Double stage high-pressure fan for coal powder injection furnace

Double stage high-pressure fan for coal powder injection furnaceThe core principle of coal powder is closely related to the high wind pressure, large air volume, and oil-free dry airflow it provides, which is used to achieve efficient transportation, uniform mixing, and stable suspension combustion of coal powder.

Double stage high-pressure fan for coal powder injection furnaceCapable of functions:

1. It has dual functions of blowing and suction, and can be used for both suction and blowing;

2. Running with little or no oil, the output air is clean;

3. Exhaust and supply fans are divided into:; Pneumatic conveying and pipeline conveying;

4. Can be modified to include six major features: thermal insulation, waterproofing, explosion-proof, anti-corrosion, coupling transmission, and belt transmission;

5. The shell is die cast as a whole and uses shockproof mounting feet, so its requirements for the installation foundation are also very low. It can even operate normally without fixing the feet, which is very convenient and saves installation costs and installation cycles;

6. The fan blades that generate centrifugal force are made of double-sided forward leaning multi blade, molded in one go, with high-quality dynamic balance, extremely low vibration, stable wind force, low noise, and can withstand certain frictional impact forces, with a long service life.

7. The drainage side panel has a built-in side suction port, which, when combined with the fan blades, can generate a large negative pressure suction force, making the self-priming feeding more stable.

The role of two-stage high-pressure fan in coal powder injection system

Provide stable high-pressure airflow: The two-stage high-pressure fan accelerates the air through the impeller twice, generating high air pressure (usually up to 130-150 millimeters of water column), which is used to blow coal powder from the coal injector or coal powder distributor to the burner.

Oil free dry gas source: Its output gas is clean, oil-free, and has low temperature rise, making it suitable for coal powder conveying systems that require high purity of the gas source to avoid coal powder agglomeration or pollution.

Dual use of blowing and suction: It can be switched to powder suction (negative pressure suction) or blowing (positive pressure conveying) mode according to system requirements, enhancing system flexibility.

The core combustion principle of coal powder injection furnace (independent of fan)

The combustion of coal powder injection furnace relies on suspended combustion technology, which includes:

Coal powder preparation: Raw coal is ground to a fineness of 0.05-0.1mm.

Wind powder mixing: Coal powder is carried into the furnace by a primary air (usually provided by a two-stage high-pressure fan).

Stable combustion: Rapid ignition and complete combustion are achieved through burner design (such as rich lean DC burner).

⚠️ Attention: The two-stage high-pressure fan is an auxiliary equipment in the conveying process, not the combustion principle itself. The combustion efficiency mainly depends on factors such as furnace temperature, air ratio, and coal powder fineness.

Precautions for use:

Before using the fan, it is necessary to carefully check whether the voltage and frequency indicated on the product nameplate meet local requirements, and strictly operate it according to the rated voltage of the motor

Before running the fan, it is necessary to check whether there is any collision or friction between the fan blades and the casing, whether the motor is grounded, and whether the insulation is good

3. Before running the fan, it is necessary to check whether the rotation direction of the impeller is correct before operation. If there is any abnormal noise during the trial run, it can be started

If there is any vibration phenomenon, the machine should be stopped immediately, the power should be cut off for troubleshooting, and it can only be used after it is normal

When the air intake of the fan is vertically downward or upward, the pressure bearing of the motor should be replaced before use

5. The temperature of mesons transported by the fan should not exceed 80 degrees Celsius

6. Fans should not be used in areas where water is easily sprayed or directly exposed to rain

7. Fans should not be used in environments where chemical gases are corrosive, flammable, or explosive

8. The foundation or support for fastening the fan must be firm

9. The connection of the fan pipeline network should be stable, and the weight of the pipeline should not be added to the various components of the fan

When a regulating valve is installed in the pipeline, the inlet regulating valve of the fan should be turned off before shutting down, and the outlet regulating valve should be slightly opened. After the fan is running normally, gradually open the regulating valve

Our service philosophy:

1. Pre sales service: We provide you with detailed technical parameters of the fan, and professional engineers will select the fan that is more suitable for your use. We can also customize non-standard products according to customers' special requirements, so that you can spend money more cost effectively.

2. In sales service: Our dedicated service personnel will track the goods with you until they arrive safely in your hands.

3. After sales service: We provide detailed operating instructions for each fan, and operators can follow the instructions to briefly understand the principles and precautions of the fan. If you have any unclear operations, you can consult our professional technical specialist to explain the operation plan to you.

4. Quality assurance: Except for vulnerable parts, our entire product line comes with a 12-month quality guarantee.