MZPG-1 automatic backwash filter

Backwash filter is a precision equipment that uses a filter screen to directly intercept impurities in water, remove suspended solids and particulate matter, reduce turbidity, purify water quality, and reduce the production of system dirt, bacteria, algae, rust, etc., in order to purify water quality and protect other equipment in the system from normal operation. The intelligent fully automatic backwash filter adopts intelligent (PLC, PAC) design. Water enters the self-cleaning filter body through the inlet, and the system can automatically identify the degree of impurity deposition and send a signal to the discharge valve for automatic discharge. The fully automatic backwash filter overcomes many disadvantages of traditional filtration products, such as small pollutant holding capacity, susceptibility to blockage by pollutants, need to disassemble and clean the filtering part, and inability to monitor the filter status. It has the function of filtering raw water and automatically cleaning and discharging the filter element. During cleaning and discharging, the system provides uninterrupted water supply, which can monitor the working status of the filter and has a high degree of automation.

Covering various filtration precision requirements from 10um to 3000um, we provide customers with various water filtration equipment. The intelligent fully automatic backwash filter can automatically clean and discharge pollutants without the need for any external energy source for operation and control.

Scope of application

The automatic backwash filter is mainly composed of high-quality carbon steel or stainless steel simplified bodies, wedge-shaped filter screens, water flow guide valves, differential pressure controllers, electric control boxes, and sewage discharge devices. It can be used for filtering industrial wastewater, seawater, food and pharmaceutical wastewater, circulating water, as well as for emulsion regeneration, waste oil, liquid raw materials and other filtration treatments. In the metallurgical industry, petrochemical industry, power plant water supply and drainage and circulating water systems, as well as processes involving liquid medium filtration, the application of automatic backwash filters is becoming increasingly widespread. Modern metallurgical enterprises in China have introduced continuous casting water systems, blast furnace water systems, high-pressure water descaling systems for hot rolling, emulsion systems, and closed water circulation systems, all of which use automatic backwash filters extensively in liquid medium filtration systems.

The backwash filter can be installed vertically, horizontally, upside down in any direction and position, and can be used for water filtration in various industries such as industry, agriculture, municipal power, electronics, medicine, food, printing and dyeing, construction, steel, metallurgy, papermaking, etc.

working principle

When the filter is working, the water flow guide valve is in the open state, and the water enters the filter through the inlet, passes through the filter screen, and flows into the outlet. And pollutants are collected at the discharge outlet or on the inner wall of the filter screen under the action of inertia and water flow impact force. This machine adopts differential pressure control and positioning control to automatically clean the filter screen. When the differential pressure between the inlet and outlet of the filter reaches the set value or the timer reaches the preset time, the electric control box sends a signal, and the drain valve opens (the water flow guide valve is in the open state). The impurities adhered to the inner wall of the filter screen by the water flow flushing are further flushed and discharged. When the water flow guide valve is fully closed, the water flow enters the outer side of the filter screen from the inlet section mesh, and most of the clean liquid flows out from the outlet. A part of the clean liquid enters the inside of the filter screen from the outside (because the system is in a pressure relief state, the pressure inside the filter screen is lower than the outer pressure), thus backwashing the filter screen. The Johnson net of the special equipment produces a spraying effect inside the filter screen, and any magazine is washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of the filter returns to normal or the timer set time ends, the electric drain valve closes and the water flow guide valve opens. Throughout the entire process, the materials did not stop flowing, achieving continuous and automated production.

Product Features

1. Electric drive, stainless steel brush cleaning, strong pressure bearing capacity of the system;

2. Intelligent control system (PLC, PAC) control, high degree of automation, precision differential pressure control design, time control;

3. The dismantling, installation, and maintenance of steel brushes are simple and easy to operate;

4. Two adjacent cleaning cycles, with alternating forward and reverse rotation of the motor, extend the lifespan of the stainless steel brush;

5. Equipped with motor overload protection, it can effectively protect the motor.

6. Humanized design of control display interface, very easy to operate;

7. No exposed wiring on the outer surface, safe and reliable.

8. Control interface: digital display/knob/switch

9. Filter type: metal wedge mesh; The filter screen is for lifelong use and does not need to be replaced; Long service life;

10. Electric drive, stainless steel brush cleaning and sewage discharge; Less vulnerable parts, no consumables, low operating costs, and simple operation and management;

11. Control mode: differential pressure/time/manual control design;

12. During the backwash period, there is continuous flow, and the cleaning and filtering cycle can be adjusted. The default cleaning and filtering time is 10-60/s. The amount of water lost during cleaning and filtering only accounts for 0.08-0.6% of the filtered water volume;

13. High precision filtration ensures stable effluent quality, with a filtration accuracy of 10-3000 microns;

14. The working pressure can reach 1.0-1.6Mpa;

15. Single flow rate: 4-4160m ³/h.

16. Short backwash time, low flow and pressure loss

17. The device can be connected to the central control system.

18. Can be applied to different raw water quality and water requirements.

19. Unique cleaning design achieves low load, low water head, and uniform discharge;

20. The direction of the electrical control box panel can be adjusted freely to meet user requirements;

21. Automatic backwashing without interruption.

Cleaning characteristics

1. The fully automatic backwash filter adopts multiple filter cartridges for filtration, with a large effective filtration area and low pressure loss. Design the filtration area to be 3-5 times the inlet and outlet area.

2. The fully automatic backwash filter is easy to maintain and repair: a maintenance manhole is set up, the filter cartridge is easy to load and unload, and the backwash filter is easy to maintain

3. The fully automatic backwash filter adopts a structure of multiple filter cartridges filtering and cleaning each filter cartridge one by one, with uninterrupted water supply during cleaning.

4. Fully automatic backwash filter program control: Various system parameters can be set according to the actual situation of the user's site.

5. The control system of the fully automatic backwash filter: The control system has high accuracy and can adjust its working mode and operating status according to different water quality to improve its adaptability to water quality.

6. Convenient control method for fully automatic backwash filter: simultaneous or separate control of pressure difference/time, can be selected according to actual working conditions and requirements, and automatically runs; Simultaneously equipped with a manual/automatic switch, the control mode can be pre-set, and electrical interlocking can be achieved,

7. The fully automatic backwash filter is equipped with local control, and if necessary, a remote control switch can be installed to achieve both local and remote operation.

8. The fully automatic backwash filter has functions such as operating status output and fault alarm output, ensuring that the equipment is used under safe and reliable conditions

9. The fully automatic backwash filter has strong filtering ability and high flow rate: The large flow "straight through" filter widely used in coal mines can only reach a flow rate of 380L/min due to its structure, while this filter can reach 800L/min or even larger. Fully automatic filter, filter, fully integrated water processor, electronic descaling device, backwash filter with high filtration accuracy: The backwash filter has two or more sets of filter elements inside, with a large flow area and small original pressure loss, which can achieve high flow and high-precision filtration (25 m, 40 m), which is difficult to achieve with traditional filters. Quantitative pollution level of backwash filter: The filter can be equipped with pressure gauges K1 and K2 at the inlet Pi and outlet Po of the liquid, with a pressure difference of P=K1-K2, which quantitatively reflects the degree of pollution of the filter and is easy to clean at any time. Traditional filters have no secondary function.

Technical Specifications

Filtering accuracy: 10-3000 μ m

Pressure loss: ≤ 0.016 Mpa

Diameter of drain valve: DN 50 mm

Discharge time: 10-60 seconds

Power supply: AC three-phase 380V/50Hz

Control interface: digital display/knob/switch

Work pressure: ≤ 1.0Mpa (please specify when placing an order if exceeding this pressure)

Working temperature: ≤ 150 ℃ C

Cleaning time: arbitrarily set

The filtering accuracy and size can be specially customized according to user requirements

Flange connection according to GB-9119.8-88

Product Diagram

Overall dimensions

（10） Selection precautions

When choosing an intelligent fully automatic backwash filter, please consider the following parameters

Considering the installation of pipelines, it is necessary to meet the requirements of intelligent and fully automatic backwashing in the site.

Consider the flow rate of the pipeline and choose the appropriate diameter to handle the flow more effectively.

Consider the chemical properties of the filter medium, whether it contains corrosiveness, etc.

Consider the suspended solids concentration and particle size of the filter medium, and choose a suitable filter mesh.

Consider the pressure of the pipeline and provide pipeline pressure parameters.