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Kunte (Liangshan) Industrial Equipment Co., Ltd

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18366752565
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Shandong Jining Liangshan

Second hand boiler dust collector manufacturer price

NegotiableUpdate on 10/25

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Second hand boiler dust collector manufacturer price

Product Details

A dust collector is a device called a dust collector or dust removal equipment that separates dust from flue gas. The performance of a dust collector is expressed by the amount of gas that can be processed, the resistance loss of gas passing through the dust collector, and the dust removal efficiency. At the same time, the price, operation and cost, service life, and difficulty of operation of dust collectors are also important factors to consider their performance. Dust collector is a commonly used facility in boilers and industrial production.

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Dust hoods are installed in various dusty areas, and the dust containing gas is transported to the dust removal device through pipeline gas paths. After solid separation, the dust is collected in the dust removal device, and the clean gas is introduced into the main pipe or directly into the atmosphere, which is the entire set of equipment for dust removal. The dust collector is an important component of this equipment. From the perspective of ventilation and dust removal, dust refers to all solid small particles that can exist in a floating state in the air for a long time. It is a dispersed system called aerosol, in which air is the dispersing medium and solid particles are the dispersing phase. A dust collector is a device that separates solid small particles from aerosols.^[1]

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According to the principle of operation, dust collectors can be divided into the following types:

1. Dry mechanical dust collectors mainly refer to dust removal equipment designed for the application of dust inertia and gravity, such as settling chambers, inert dust collectors, cyclone dust collectors, and other high concentration dust collectors. They are mainly used for the separation or concentration of high concentration coarse particle size dust.

2. Wet dust collectors are dust removal devices that rely on hydraulic lubrication to separate and capture dust particles, such as spray towers, scrubbers, impact dust collectors, Venturi tubes, etc. They are commonly used in the treatment of high concentration and high air volume dust containing gases that occur in production. The separation efficiency of coarser, hydrophilic dust is higher than that of dry mechanical dust collectors.

3. A granular layer dust collector is a device that uses layers of granular materials with different particle sizes as filter media to block and filter dust contained in the air solution. Mainly used as a dust removal point in the production of building materials, metallurgy, etc., it often filters high concentration, coarse particles, and high-temperature dusty flue gas.

4. Bag filter is a dust removal device that uses fiber fabric or filling layer as the filtering medium. It has a wide range of applications, forms, dust removal air volume, and efficiency. It is mainly used in places where fine dust is captured, both in exhaust dust removal and intake air. In recent years, due to the continuous development of new filter materials, the development of fiber filtration technology has also accelerated, new products continue to emerge, and the application fields are increasingly expanding.

5. The electrostatic precipitator is a dust collector that introduces a dusty airflow into an electrostatic field. Under the action of a high-voltage electric field, the gas ionizes, producing electrons and positive ions, which respectively move towards the positive and negative poles. When the dust particles flow through the working electric field, they become negatively charged and move at a certain speed towards the settling plate opposite to their negative charge sign, where they settle and detach from the airflow, and are collected in the electrostatic precipitator. This type of dust collector has high dust removal efficiency, low resistance, and is convenient. It has a similar effect to bag filters in capturing dust particles.^[1]

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AQ coal mine bag filter

DL/T 514-2004 Electric Dust Collector

JB/T 10341-2002 Filter cartridge dust collector

JB/T 20108-2007 Pulse type Bag Dust Collector

JB/T 6409-2008 Wet electrostatic precipitator for gas use

MT 159-1995 Mining Dust Collector

JC/T 819-2007 CXBC series bag filter for cement industry

JC 837-1998 Backblowing Bag Dust Collector for Building Materials Industry

JB/T 8532-2008 Pulse Spray Bag Dust Collector

JB/T 9055-1999 Mechanical Vibration Bag Filter

The performance of a dust collector not only directly affects the reliable operation of dust removal, but also relates to the normal operation of production, the hygiene of workshop and surrounding residents, the wear and tear of fan blades, and the recycling of economically valuable materials. Therefore, it is necessary to design, select, and use dust collectors correctly. When choosing a dust collector, it is necessary to consider factors such as dust removal efficiency, pressure loss, reliability, initial investment, area, and maintenance. Based on the physical and chemical properties, characteristics, and production process requirements of the smoke and dust, a targeted dust collector should be selected.

1. According to the requirements of dust removal efficiency

The selected dust collector must meet the emission requirements.

Different dust collectors have different dust removal efficiencies. For dust removal with unstable or fluctuating operating conditions, attention should be paid to the impact of changes in flue gas treatment capacity on dust removal efficiency. During normal operation, the efficiency of the dust collector is ranked as follows: bag filter, electrostatic precipitator, Venturi dust collector, water film cyclone dust collector, cyclone dust collector, inertial dust collector, and gravity dust collector

2. According to the properties of the gas

When choosing a dust collector, factors such as gas volume, temperature, composition, and humidity must be considered. The electrostatic precipitator is suitable for purifying flue gas with high air volume and temperature<400 ℃; Bag filter is suitable for purifying flue gas with a temperature below 260 ℃, regardless of the amount of flue gas. When the temperature is above 260 ℃, the flue gas should be cooled down before using bag filter; Bag filters are not suitable for purifying high humidity and oily flue gas; The purification of flammable and explosive gases (such as coal gas) is suitable for wet dust collectors; The processing air volume of cyclone dust collectors is limited. When the air volume is large, multiple dust collectors can be connected in parallel; When it is necessary to simultaneously remove dust and purify harmful gases, spray towers and rotary film dust collectors can be considered. < p=“'>

3. According to the nature of the dust

The properties of dust include specific resistance, particle size, true density, hydrophobicity, water hardness, flammability, etc. Electrostatic precipitators are not suitable for dust with a specific resistance or too small, and bag filters are not affected by the specific resistance of dust; The concentration and particle size of dust have a significant impact on the efficiency of electrostatic precipitators, but not on bag filters; When the dust concentration of the gas is high, a pre dust removal device should be installed before the electrostatic precipitator; The type of bag filter, dust cleaning and filtering wind speed depend on the properties of the dust (particle size, ladle shape); Wet dust collectors are not suitable for purifying hydrophobic and hydraulic dust: the true density of dust has a significant impact on gravity dust collectors, inertial dust collectors, and cyclone dust collectors; For dust with high adhesion, it is easy for the dust collector working face to get tangled or blocked, therefore, dry dust removal should not be used; When dust purification encounters water and can produce flammable or hazardous mixtures, wet dust collectors should not be used.

4. Based on pressure loss and energy consumption

The resistance of bag filter is greater than that of electrostatic precipitator, but compared with the overall energy consumption of the dust collector, the difference in energy consumption between the two is not significant.

5. Based on equipment investment and operating costs

6. Requirements for water conservation and antifreeze

Areas with water resources are not suitable for using wet dust collectors; There is a problem of winter freezing in northern regions, so wet dust collectors should be avoided as much as possible.

7. Requirements for dust and gas recycling and utilization

When dust has recycling value, dry dust removal should be adopted; When dust has high recycling value, bag filter should be used; When the purified gas needs to be recycled or the purified air needs to be recycled, a bag filter should be used.^[2]

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The technical performance indicators of a dust collector mainly include dust removal efficiency, pressure loss, handling capacity, and load adaptability.^[3] 1. Dust removal efficiency
In dust removal engineering design, the rate is generally used as an assessment indicator, and sometimes the classification efficiency is also used to express it.
(1) The rate is the percentage of dust removed by the dust collector to the amount of dust entering the dust collector. The following equation represents:
H=G2÷G1×100%
In the formula, η -------- efficiency of the dust collector,%;
G1- The amount of dust entering the dust collector, g/s；
G2------- The amount of dust removed by the dust collector, g/s；
Due to the inability to directly measure the amount of dust entering the dust collector on site, the dust concentration and corresponding air volume in the inlet and outlet airflow of the dust collector should be measured first, and then calculated using the following formula:

In the formula, Q1 represents the inlet air volume of the dust collector, m3/s；
C1- inlet concentration of dust collector, mg/m3；
Q2--------- Dust collector outlet air volume, m3/s；
C2-------- Dust collector outlet concentration, mg/m3。
(2) Overall efficiency

If several dust collectors with dust removal efficiencies of η 1, η 2..., η n are connected in series during dust removal, the total dust removal efficiency is represented by η and calculated according to the following formula
h=(1-h1)(1-h2). (1-day)
(3) The penetration rate ρ is the percentage of the amount of dust at the outlet of the dust remover to the amount of dust entering the inlet, calculated according to the following formula:

(4) The classification efficiency n is the dust removal efficiency of the dust collector for a certain particle size d or particle size range △ d, as shown in the following equation

2. Pressure loss
The pressure loss of a dust collector is the difference between the airflow at the inlet and outlet of the dust collector, representing the mechanical energy consumed by the gas flowing through the dust collector. When the local resistance coefficient ξ value of the dust collector is known, it can be calculated using the following formula. On site, pressure gauges can be used to measure directly.

In the formula, △ p represents the pressure loss of the dust collector, Pa；
ρ u -------- density of the body, kg/m3；
The airflow velocity at the inlet of the dust collector, m/s。
3. Location volume
The capacity of the dust collector is generally expressed in terms of volumetric flow rate (m3/h or m3/s) or flow rate (kg/h or kg/s).
4. Load adaptability
A dust collector with good load adaptability can maintain dust removal efficiency, moderate pressure loss, and sufficiently high operational efficiency even when the volume or pollutant concentration fluctuates within a large range.^[3]

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Negative pressure blowback filter bag dust collector

Negative pressure blowback filter bag dust collector for treating industrial boiler exhaust gas pollution. Practice has shown that filter bag dust removal has the advantages of low investment, small area, large filtration area, high working performance and purification efficiency, reliable use, and easy comprehensive utilization of recovered dry smoke and dust. It effectively protects and is a reliable dust removal device with good performance that meets the requirements of current environmental protection laws.

In order to effectively control boiler exhaust gas pollution, the factory has conducted research on filter bag dust removal technology, combined with the operating characteristics of fast loading chain grate boilers, and designed a negative pressure back blowing filter bag dust collector according to production requirements and site conditions. The dust collector is located in the negative pressure zone of the boiler induced draft fan, and the induced draft fan is used to form the negative pressure of the dust collector. The medium alkaline glass fiber filter material is used to prevent the corrosion of SO2 in the flue gas.

The negative pressure back blowing bag filter fundamentally controls pollution, and the purified smoke and dust emission concentration is significantly lower.

Schematic diagram of negative pressure blowback filter bag dust collector.

1- Air inlet; 2- Motor; 3- Spiral conveyor; 4- Pool dust outlet; 5- Airflow diversion plate; 6- Dust collector; 7- Dust filtering chamber; 8- Dust filter bag; 9- Flower board; 10- Air outlet.

The boiler adopts Y5-48-6.37 centrifugal induced draft fan, with a flow rate of 12350m3/h, a pressure of 3942Pa, a speed of 2900r/min, and a power of 22kW, as the induced draft device for the negative pressure back blowing filter bag dust collector of the boiler. To ensure that the filter bag dust collector works normally or performs filter bag cleaning operations without shutting down the boiler, the dust collector is divided into three filter rooms. 22 filter bags are installed in each room, and the filter bags for dust removal can be grouped or operated in parallel. When one group of filter bags is used for dust cleaning, the other groups of filter bags remain in normal operation. The flue gas enters from the tangent line of the lower air inlet of the dust collector, and moves forward along the negative pressure airway inside the dust collector. Some dust particles settle in the dust collection hopper due to gravity; When the other part of the flue gas passes through the filter bag, the smoke and dust are trapped inside the filter bag, and the purified gas is discharged outward through the induced draft fan, thus achieving the purpose of collecting and removing smoke and dust, purifying gas, and protecting the atmosphere.

The purification mechanism of negative pressure back blowing filter bag dust collector is to use the boiler induced draft fan to form negative pressure in the dust collector, and the flue gas flows in a negative direction. Filter bag dust removal has the functions of inertia collision, screening (retention), interception, and electrostatic filtration, and can effectively capture smoke particles and suspended fine dust of coarse (≥ 10 μ m particle size) and fine (<5 μ m particle size, which are harmful to human health) particles. This is its outstanding advantage.

After the filter bag is cleaned and the dust collector runs for a period of time, a certain thickness of smoke and dust adheres to the surface of the filter bag. By controlling the blowback valve, the smoke and dust on the surface of the bag are removed.

The filter bag dust collector is located in the negative pressure zone of the induced draft fan, allowing the dust removal to work in a negative pressure state, which is beneficial for the service life of the induced draft fan and avoids wear from smoke and dust. In order to ensure the normal operation of the filter bag, a bypass flue and valve are also set up for boiler maintenance, baking, and ignition. The use of fuel containing a lot of oil smoke has a temporary impact on the filter bag.

The negative pressure blowback filter bag dust collector has a simple structure and a small area (within 30m2), and can be flexibly designed and arranged on site according to production needs.

The negative pressure back blowing filter bag dust collector has strong ability to purify dusty gases and effectively control pollution, especially after purification, the concentration of smoke and dust emissions is significantly lower than the prescribed emissions. It can be applied to small and medium-sized industrial boilers, and the dust removal efficiency can reach over 98%.

The production and operation cost of negative pressure blowback filter bag dust collector is relatively low, and the energy consumption is lower compared to similar technologies.

Negative pressure back blowing filter bag dust collector can effectively capture harmful smoke and suspended fine dust with particle size ≥ 10 μ m and<5 μ m, which plays a special role in purifying the atmosphere and protecting human health.

Biological nanofilm dust removal

Biological nanofilm dust removal equipment is a dust removal device that has begun to rise abroad. It uses biological nanofilm technology to generate dust during production and processing by spraying BME nanofilm onto the surface limit of the material. This type of dust removal technology belongs to pre emission dust removal, which has great advantages compared to other post production dust removal methods, enabling effective control of dust emission throughout the entire material production process. The dust generated during the crushing process is refined into fine materials and eventually becomes finished products, with a production rate of 0.5% -3%. In addition, it can effectively pollute PM2.5 and PM10, which complies with relevant environmental protection and energy-saving emission reduction technology policies. Compared with wet dust removal and bag dust removal, biological nanofilm dust suppression has no water pollution, no side effects on the formulation, and does not affect the quality of finished materials. It has lower investment costs and is suitable for dust pollution control in mines, buildings, quarries, yards, ports, thermal power plants, steel plants, garbage recycling and treatment sites. Nano film dust removal has been applied in different ways overseas and is gradually being applied in many provinces and cities in China.

Low voltage pulse long cloth bag

Dust collector, bag filter, bag filter

The low-pressure pulse jet long bag dust collector is a new type of bag dust collector developed based on the summary of various bag dust collectors. It adopts offline low-pressure pulse jet cleaning technology to prevent dust reattachment and loss of control, enhance the cleaning effect of the filter bag, improve filtration speed, save cleaning energy consumption and filter bag life. The dust collector adopts a PLC programmable controller to automatically control the entire process of dust cleaning and transportation. Therefore, this dust collector is a large-scale dust removal equipment with large air volume, good dust cleaning effect, high dust removal efficiency, reliable operation, convenience, and small area.

2、 Electrostatic precipitator, electrostatic precipitator, electrostatic precipitator; Alkali recovery furnace electrostatic precipitator

Working Principle:

This dust collector is mainly composed of an ash hopper, a filter chamber, a clean air chamber, a bracket, a valve, and a blowing and cleaning device. During work, dusty gas enters the ash hopper through the air duct. Large particles of dust directly fall into the bottom of the ash hopper, while smaller particles enter the filtering chamber with the airflow and are trapped on the outer surface of the filter bag. The purified flue gas enters the bag and passes through the bag mouth and the clean air chamber before entering the exhaust outlet.

As the filtration process continues, the dust on the outer surface of the filter bag continues to accumulate, and the resistance of the equipment increases accordingly. When the resistance of the equipment rises to a certain value, a cleaning operation should be carried out to remove the accumulated dust on the surface of the filter bag.

Electric bag composite dust collector, electric bag dust collector, electric bag combined dust collector;

Performance characteristics:

Adopting low-pressure pulse blowing technology, the cleaning efficiency is high and the energy consumption is low.

Use a straight through low-pressure pulse valve. The injection pressure is only 0.2-0.4 MPa, with low resistance, fast opening and closing, and strong dust cleaning ability. Due to the good cleaning effect and long cleaning cycle, the energy consumption of reverse blowing gas is reduced.

Pulse valves have a long service life and good reliability.

Due to the low injection pressure (0.2-0.4MPa), the pressure and impact force on the pulse valve diaphragm during opening and closing are relatively low. At the same time, due to the long cleaning cycle, the pulse valve opens correspondingly, thereby extending the service life and reliability of the pulse valve.

The equipment has low operating resistance and good spraying effect.

The dust collector adopts a segmented pulse back blowing offline dust cleaning method, which avoids the phenomenon of dust being repeatedly adsorbed, improves the effect of pulse blowing dust cleaning, and reduces the resistance of the bag.

The filter bag is easy to assemble and disassemble, and the fixation is reliable

When using upper suction and bag replacement, the dirty bag is placed into the ash hopper from the filter bag skeleton in the clean air chamber of the dust collector, and then removed from the ash hopper hole for bag replacement. The filter bag is fixed to the flower plate hole by the elastic expansion ring at the bag mouth, which is firmly fixed and has good sealing performance.

The air duct adopts a pipe layout with a compact structure.
Adopting advanced PLC programmable controller for the operation of the dust collector.

Using differential pressure or timing control, it has high reliability, long service life, and is easy for users to operate and use.

Specifications and technical parameters: 1. RFLML low-pressure pulse jet long bag dust collector, divided into RFLML390 and RFLML970

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bag filter

The working principle of a dust collector is as follows: the dusty gas enters the filter chamber through an open flange at the bottom, and the coarser particles directly fall into the ash bin. The dusty gas is filtered by a filter bag, and the dust is trapped on the bag surface. The clean gas passes through the bag mouth to the clean air chamber and is then released into the atmosphere by a fan. When the dust on the surface of the filter bag continues, the programmable controller starts to work. The pulse valves are opened one by one, and compressed air is sprayed through the nozzle to clean the dust on the filter bag. Suddenly, under the action of reverse airflow, the dust on the surface of the bag quickly separates from the filter bag and falls into the ash bin. The dust is discharged from the ash discharge valve.

The dust collector is mainly composed of an upper box, a middle box, an ash hopper, an inlet air flow pipe, a support filter bag and blowing device, an ash unloading device, etc. The dusty gas enters the ash hoppers of each compartment through the inlet air duct of the dust collector, and under the guidance of the ash hopper guide device, the large particles of dust are separated and directly fall into the ash hopper, while the finer dust uniformly enters the middle box and adsorbs on the outer surface of the filter bag. The clean gas passes through the filter bag and enters the upper box, and then passes through various offline valves and exhaust pipes to the atmosphere. As the filtration process progresses, the dust on the filter bag accumulates more and more. When the equipment resistance reaches the limited resistance value (usually set at 1500Pa), the cleaning control device automatically closes the offline valve in one room according to the differential pressure setting value or cleaning time setting value. Then, the electrically controlled pulse valve is opened according to the set program to stop air blowing. The compressed air is instantly sprayed to increase the pressure inside the filter bag, and the dust on the filter bag is shaken off (even if it is sticky with fine dust, it can be thoroughly cleaned) and sent to the ash hopper by the ash discharge mechanism.

cyclone dust collector

After adding a bypass, the working principle of the cyclone dust collector is that the dust containing gas enters tangentially from the inlet. As the airflow moves, it separates up and down to form a double vortex motion. The dust produces a strong separation effect at the boundary of the double vortex, and the coarser dust particles are separated to the outer wall with the downward vortex airflow. Some of the dust is led out from the middle of the bypass separation chamber, and the remaining dust is carried into the ash hopper by the downward airflow. The upward spiral vortex airflow has an effect on fine particulate dust, thereby improving dust removal efficiency. These finer dust particles are carried upwards by the upper vortex airflow, forming a strong upper dust ring under the top cover, and entering the upper part of the bypass separation chamber together with the upper vortex airflow. They are introduced into the cone through the return air outlet and merge with the internal airflow. The purified gas is discharged through the exhaust pipe, and the separated dust enters the hopper.

After entering the equipment from the top air inlet, the dusty gas passes through the cyclone separator at high speed, causing the dusty gas to spiral downwards along the axis. By using centrifugal force, the coarser particles of dust are removed, effectively controlling the initial dust concentration entering the electric field. Then, the gas enters the electric field through the lower ash hopper for operation. Due to the cross-sectional area of the lower ash hopper being several times larger than that of the inner pipe, according to the principle of moment invariance, a zero velocity interface is rapidly generated between the radial and axial wind speeds, causing heavy particulate dust in the inner pipe to settle inside the lower ash hopper. The concentration of dust entering the electric field is reduced. Low concentration dust containing gas is collected by electrostatic precipitator and condensed on the anode and cathode plates. The collected dust is transported away by the air lock and dust discharge device through dust cleaning and vibration. In order to prevent secondary dust formation in the lower ash hopper after the inner tube cyclone and electric field plate vibration, isolation cones are specially installed in the lower ash hopper.

Scope of use: Various grinding machines, crushing points, feeding ports, packaging machines, drying and various similar dispersion source treatments in industries such as cement and fertilizer.

Cartridge dust collector

Under the action of the main fan, the dust containing gas enters the gas box at the bottom of the dust collector from the air inlet at the bottom of the dust collector for pre-treatment, and then enters each dust removal chamber in the upper box from the bottom; Dust is adsorbed on the outer surface of the filter cartridge, and the filtered clean gas enters the clean air chamber of the upper box through the filter cartridge and collects at the air outlet.

As the filtration process progresses, the dust accumulated on the outer surface of the filter cartridge will accumulate more and more, which will correspondingly increase the operating resistance of the equipment. In order to ensure normal operation, the upper limit of the dust collector resistance should be maintained within the range of 1400-1600Pa. When this limit is exceeded, the PLC pulse automatic controller should issue commands through fixed resistance or timing to perform three state dust cleaning.

The dust cleaning of this filter cartridge dust collector is achieved by first cutting off the clean air outlet channel of a certain room, keeping the room in a static state of air flow, and then performing compressed air pulse back blowing dust cleaning. After a few seconds of natural settling, the clean air outlet channel of the room is opened again. This not only thoroughly cleans the dust, but also avoids the secondary adsorption of dust generated by spraying dust cleaning, thus circulating dust cleaning room by room.

Multi tube dust remover

The dusty gas enters the gas distribution chamber through the main intake pipe and then enters the annular gap between the ceramic cyclone body and the guide vane. The guide vane changes the gas from linear motion to circular motion, and the majority of the airflow follows the cyclone body in a spiral shape downwards from the cylindrical body, flowing towards the cone. The dusty gas generates centrifugal force in the middle, throwing dust particles with a density greater than that of the gas towards the cylinder wall. The dust particles lose their inertia when they interact with the cylinder wall, and rely on the momentum of the inlet velocity and downward gravity to fall along the wall into the ash discharge port and enter the main ash hopper. When the descending external air reaches the lower end of the cone, it continues to spiral in the same direction along the axis of the cyclone tube from bottom to top due to the contraction of the cone (clean air). It enters the exhaust chamber through the ceramic cyclone body exhaust pipe and exits through the main exhaust port.

Electrostatic precipitator

The electrostatic precipitator is built on the basis of electrostatic precipitator and dust source control, and is a new way to solve the problem of dust removal in small dispersed dust points. It uses the exhaust ducts or sealed covers of production equipment as electrode plates, installs discharge electrodes inside the covers or pipes, and connects to a high-voltage power source to form an electric field. When a dusty gas passes through an electric field, the dust is trapped on the hood or pipe wall under the force of the electric field, and the purified gas passes through the exhaust duct. Dust removal relies on manual vibration or self weight shedding. Especially suitable for dust dispersion points such as crushing and screening workshops, sintering conveyor belts, as well as smoke and dust purification in mine tunnels and small boilers. Although there are various forms of simple electrostatic precipitators, they can be classified into three types: hood type, tube type, and open type.

Dust removal device

The hood type dust removal device controls the locally generated dust source point within a closed hood, and applies a piezoelectric electric field or captures dust. A typical hood type dust removal device is used on process equipment for crushing, transporting, and screening raw materials, such as belt conveyors, vibrating screens, warehouse roofs, and dust points with material level differences.

Explosion-proof dust collector

Because aluminum powder dust is highly likely to occur in the presence of sparks or static electricity at a certain concentration.

Because of aluminum powder, the key factor is the concentration of aluminum powder, and the effective way to control aluminum powder is to control the concentration of aluminum powder. The tool used to control the concentration of aluminum powder in the equipment is a dust collector. As long as the dust collector of the shot blasting machine is in good working condition and has good dust removal effect, the aluminum powder concentration of the entire shot blasting cleaning machine equipment will not increase. Therefore, ensuring good dust removal effect is the key to the normal operation of the equipment. The effectiveness of dust removal mainly depends on the filtering material, and when the filtering material becomes clogged, the dust removal effect will be greatly improved. When the ventilation and filtration of the filter material are good, the pressure difference between the static pressure chamber and the dynamic pressure chamber of the dust collector will be within a fixed range. Therefore, controlling the pressure difference of the dust collector is an effective way to control its working state. Based on this, Disha Company invented an explosion-proof dust collector. The main method is to install a pressure difference controller near the dust collector of the shot blasting cleaning machine without vibration. When the dust collector of the shot blasting machine is blocked for a period of time, the pressure difference detected by the instrument will change. When the detection value exceeds the set upper and lower limits, the pressure difference controller will control the cleaning mechanism of the filter bag of the dust collector to work, such as the vibration or back blowing mechanism to remove the dust on the surface of the filter material of the dust collector, to ensure that the dust removal has a good working condition. When automatic cleaning is still not required, the differential pressure controller will control the device and automatically shut it down to prevent accidents.

To ensure safe operation, we have also installed a gravity type automatic blasting door at the key position of the shot blasting machine dust collector. This device is generally designed at the top of the shot blasting chamber and dust removal pipeline, in areas with dense dust. After calculation, the device can automatically open the door at the first occurrence to release pressure and avoid injury to equipment and personnel. After unloading, the door automatically closes by gravity.

The shot blasting machine adopts a FEF210 chamber back blowing bag type dust collector, with a dust removal efficiency of over 99% and a waste gas emission of ≤ 90mg/m3, in compliance with GBJ4-73 industrial "three wastes" emissions. The main fan power is 30kw, and the dust removal bag is made of precision sewn felt industrial filter cloth with anti-static function. The bag can be easily removed for cleaning and reuse. And the filter bag is reliably grounded during installation, which can effectively avoid the possibility of aluminum powder caused by static electricity.

Pulse bag filter

Since its introduction in the 1950s, the pulse bag filter has been widely used and continuously improved at home and abroad, and has made great progress in purifying dusty gases. Due to advanced dust cleaning technology and a large gas to cloth ratio, it has the characteristics of large air volume, small area, high purification efficiency, reliable operation, simple structure, and low maintenance. The dust removal efficiency can reach over 99%. It is a mature and relatively complete dust removal equipment.^[4]

feature

1. This dust collector adopts the technique of segmented air stop pulse blowing for dust cleaning, which overcomes the shortcomings of conventional pulse dust collectors and segmented back blowing dust collectors. It has strong dust cleaning ability, high dust removal efficiency, low emission concentration, low air leakage rate, low energy consumption, low steel consumption, small area, reliable operation, and good economic benefits. Suitable for the purification of dusty gases and material recovery in metallurgy, building materials, cement, machinery, chemical, power, and light industry industries.

2. Due to the use of split chamber air stop pulse spraying for thorough cleaning, the cleaning cycle, energy consumption, and compressed air consumption can be significantly reduced. At the same time, the fatigue level of the filter bag and pulse valve is correspondingly reduced, thereby doubling the lifespan of the filter bag and valve plate.

3. The maintenance and bag replacement can be carried out in separate rooms under normal operating conditions without stopping the fan. The filter bag mouth adopts an elastic expansion ring, which has good sealing performance and is firm and reliable. The filter bag keel adopts a polygonal shape, which not only ensures the longevity of the bag and the keel, but also facilitates the unloading of the bag.

4. The upper part of the bag is used for bag extraction. After the skeleton is replaced, the dirty bag is put into the lower ash hopper of the box and taken out from the manhole. The operating conditions for bag replacement are determined.

5. The box adopts an airtight design with good sealing performance. The inspection door is made of excellent sealing materials, and kerosene is used for leak detection during production, resulting in a very low air leakage rate.

6. The layout of the inlet and outlet air ducts is compact, with low airflow resistance.

Second hand boiler dust collector manufacturer price

The deputy general manager of the company, Wu Zhouping, said that the double harvest of enterprise output value and efficiency is partly due to the excellent development of the entire industry and demand; On the other hand, enterprises rely on the continuous upgrading of automation equipment, the continuous improvement of products and services, and the market competitiveness of new products.

Dust removal equipment has been widely used in industries such as power, water conservancy, steel, and chemical in China, making a positive contribution to effectively controlling waste emissions. However, it should also be noted that the problem of air pollution in China is still prominent. According to data released by the Environmental Protection Bureau, in July 2013, the proportion of severe pollution and severe pollution days in 74 cities was 3.2 and 0.4 percentage points respectively, and the concentrations of major pollutants were also present. Among the days exceeding the standard, ozone and PM2.5 were the primary pollutants, accounting for 71.6% and 24% of the pollution days respectively. The data shows that ozone replaced PM2.5 as the main pollutant in July.

In order to address air pollution and protect the atmosphere, China is increasingly investing in environmental protection measures, and the proportion of environmental investment in GDP is also increasing. As the main equipment manufacturing product for controlling air pollution, dust removal equipment has broad prospects for utilization.

Although the current dust removal equipment manufacturing industry in China still has low market access barriers and inconsistent standards, which result in uneven competition among enterprises participating in projects and have a certain adverse impact on the development of the industry. However, in recent years, various indicators of China's dust removal equipment manufacturing industry have maintained an average annual growth rate of over 30%, with good development prospects, making the investment prospects of China's dust removal equipment manufacturing industry still broad.^[5]

You must understand that it is a priority for individuals, "said a power company." Of course, the chairman and all other executives are under tremendous pressure. Failure cannot be tolerated. "2. Power investment: Central occupies an important position. In 2012, (RedesEnerg é ticasNaconais) shareholders.

The dust removal effect of a bag filter depends on factors that directly affect its purification efficiency and lifespan. So, what are the ten points? Affected factors

(1) Selection of filter bag: The filter bag should be made of wear-resistant and high-temperature resistant materials, such as fiberglass cloth/felt, NOMEX、 Felt, P84 felt, etc. Considering the wear resistance, durability, high temperature, and cost of filter bags, NOMEX felt is generally used in the copper industry.
(2) Temperature control: Generally, the filter bag can withstand a temperature of 200 ℃, so the inlet temperature of the treatment facility should be controlled below 200 ℃. When the flue gas after the long smoke pipe reaches the dust collector box, the temperature can be reduced to below 200 ℃. In special cases, water cooling can be carried out, and a cooler can be installed at the main smoke pipe.
(3) Fan selection: Induced draft fan is more effective than supply fan.
(4) Mechanical dust removal is more convenient and clean than manual dust removal, but the cost of mechanical dust removal is higher. Currently, pulse dust removal method is mostly used.
(5) Leakage and resistance: Theoretically, the dust removal efficiency of a bag filter is calculated to be 99%, but it cannot be achieved in actual testing, mainly due to the influence of leakage and resistance. The lower the leakage rate, the better the dust removal effect; Resistance has a certain impact on the dust removal effect. Regularly emptying the filter bag can improve the dust removal effect due to resistance.
(6) The dust collection hood should be as close as possible to the furnace head to make it easier for dust to enter the hood, collect dust, and discharge pollution in an unorganized manner.
(7) Equipment: Instruments, equipment, and cloth bags are prone to damage and should be repaired and replaced in a timely manner.
(8) Airflow velocity: At an airflow velocity of 1-3 m/s, the dust removal efficiency is generally controlled at a wind speed of 2-4 m/s.
(9) Filtering area: The larger the filtering area, the higher the dust removal efficiency, but the cost will correspondingly increase. So the air volume should be calculated in advance, and then the corresponding dust collector model should be selected.
(10) Secondary dust removal: A settling chamber is installed in front of the dust collector box to form secondary dust removal. The settling chamber can remove a portion of large particulate dust, temperature, and dust collector pressure.

3D mixer

Second hand boiler dust collector manufacturer price

In addition, the current development problems of electronic gases in China are as follows: A. The overall scale of the industry is not large, the localization rate is low, the enterprise scale is small, and it is easy to be excluded by foreign large enterprises; B. There is a lack of new material technology in manufacturing, and a large number of gas types with low technological barriers are being repeatedly constructed and expanded, resulting in serious disorderly competition; C. Some electronic gas companies have transformed from the large chemical industry or industrial gas industry, with a focus on quality awareness and philosophy.

The application of bag filter has a history of more than a hundred years, and its advantages are high dust removal efficiency (up to 99.99%), emission concentration can reach below 10mg/m ³, and classification efficiency is also very high. It has good capture efficiency for fine particles below 2.5 μ m, so it is widely used. However, after years of operation, bag filters have encountered some problems, such as easily damaged filter bags, condensation, high operating resistance, malfunctioning dust cleaning, and poor ash discharge from the ash hopper. There are many factors that can cause problems in the operation of bag filters. In addition to the dust collector itself, improper operation is also an important cause of problems during operation. This article analyzes and discusses the common problems that occur during the operation of bag filters.

1. Filter bag issue

The progress of bag filter mainly lies in the innovation of filter materials and the transformation of dust cleaning, and the filter bag is the heart of bag filter. The maintenance cost of the filter bag accounts for more than 70% of the maintenance cost of the dust collector. The filter bag is a key factor determining the performance of the dust collector. The main factors causing damage to filter bags include high temperature burning, corrosion, mechanical damage, installation, product, operation, and other factors.

1.1 High temperature flue gas damage to filter bags

(1) High temperature burning

The damage of high temperature to filter bags is fatal. For example, in a coal powder drying kiln in Heilongjiang Province, due to the extremely sticky and difficult dust cleaning of the dried coal powder particles, a large amount of dried coal powder remains on the surface of the filter bag. This dried coal powder has a very low ignition point, and when high-temperature flue gas enters the dust collector, it quickly ignites the coal powder on the surface of the filter bag, and the entire filter bag and skeleton of the dust collector are burned. From Figure 1, it can be seen that there is a large amount of dried coal powder remaining on the surface of the filter bag, and the box body can also be seen burned from the upper left corner.

(2) Mars burns through

In addition to high-temperature burning, sparks in the smoke also cause serious damage to the filter bag. During production, there will be a large amount of sparks mixed into the flue gas, such as coke ovens, drying kilns, chain furnaces, cupolas, electric furnaces, blast furnaces, and mixed iron furnaces. If the sparks are not treated in a timely manner, especially when the dust layer on the surface of the filter bag is thin, they will burn through the filter bag and form irregular circular holes (as shown in Figure 2). But when the dust layer on the surface of the filter bag is thick, sparks will not directly burn through the filter bag, but will cause dark baking marks on the surface of the filter bag.

(3) High temperature shrinkage

Another type of damage caused by high-temperature flue gas to filter bags is high-temperature shrinkage. Although the operating temperature of each filter material is different, when the flue gas temperature exceeds its operating temperature, its longitudinal shrinkage rate will cause the size of the filter bag to shorten in the length direction, and the bottom of the filter bag will tightly support the skeleton and be damaged by force (as shown in Figure 3). If the filter bag shrinks in the transverse direction, it will cause the radial size of the filter bag to decrease, and the filter bag will be tightly clamped on the skeleton, even unable to form the skeleton. Thus, the filter bag is constantly under stress, causing shrinkage deformation and brittleness of the filter bag, accelerating strength loss, and shortening the service life of the filter bag. Due to the deformation of the filter bag, it will tightly clamp onto the skeleton, making it difficult for the filter bag to deform during dust cleaning, which is not conducive to spraying and cleaning, resulting in high resistance of the filter bag.

(4) Dust from the ash hopper accumulates heat and burns the filter bag

After high-temperature dust is collected into the ash hopper, if it is not collected in time, the dust will accumulate in the hopper for a long time, causing the temperature inside the hopper to continuously rise. The filter bag will become brittle and, in severe cases, burn out under high temperature baking, especially the flammable content contained in the dust, which will burn out the filter bag inside the hopper.^[6]

1.2 Corrosion of filter bags

Corrosion is one of the common causes of filter bag damage. Due to the presence of various corrosives in flue gas and the greater corrosive effect at high temperatures, filter bag damage can occur. The main causes of corrosion include hydrolysis, oxidation, acid, and alkali corrosion. The damage is mainly caused by hydrolysis and oxidation, while acid corrosion is less and alkali corrosion is even less.

1.3 Mechanical damage

Due to the attention paid by filter material manufacturers to their products, filter materials generally do not experience mechanical damage or other issues before leaving the factory. Mechanical damage is mainly caused by wear and tear during transportation, installation, and operation.^[7]

1.4 Design Issues

Reasonable design is a prerequisite for ensuring the service life of filter bags, but in the design of bag filters, excessive emphasis is often placed on various economic indicators, which can easily overlook the rationality of the airflow field distribution in the filter chamber box. Due to the unreasonable distribution of airflow, the speed between the bags is too fast, causing damage to the filter bags from time to time. A typical example is the early mechanical rotary flat bag dust collector, whose filter box filter bag arrangement density is higher than that of the existing dust collector, resulting in the erosion and damage of the filter bag by the airflow. Improper selection of the length to diameter ratio of the filter bag can also cause wear and tear on the filter bag due to excessive bag opening speed.

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