What is the calculation of the air consumption of the pulse precipitator?

What is the calculation of the air consumption of the pulse precipitator?

With the extension of the filtering time, the dust layer on the filter bag continues to thicken, and the resistance of the dust removal equipment continues to increase. When the resistance of the equipment rises to the set value, the dust cleaning device starts to clean the dust. First, a sub-chamber lift valve is closed to cut off the filter air flow, and then the electromagnetic pulse valve is opened. The compressed air rapidly expands in the upper case in a very short time, pours into the filter bag, causes the filter bag to expand and deform, generates vibration, and reverses the flow Under the action of scouring, the dust attached to the outer surface of the filter bag is peeled and dropped into the ash hopper. After the dust cleaning is completed, the electromagnetic pulse valve is closed, the poppet valve is opened, and the chamber is restored to the filtering state. The cleaning of each chamber is performed sequentially, from the cleaning of the first chamber to the start of the next cleaning, which is a cleaning cycle. The dust that has been intercepted after filtering and ash cleaning work falls into the ash hopper, and is concentratedly discharged by the ash unloading device at the ash hopper mouth.

So the Dalian bag filter manufacturer tells you how to calculate the air consumption of the pulse filter?

(1) Quality requirements of dust cleaning gas source. The quality of the air source used for ash cleaning has a great effect on the ash cleaning effect. The quality of the air source should meet the level 2 quality standard in the compressed air quality requirements. Among them, the maximum solid particle size is not more than 1um, the maximum pressure dew point temperature is -40 ° C, and the maximum oil content is less than 0.1mg / m3.

(2) Calculation of compressed air consumption.

 V = αnq / 1000T

In the formula: V——gas consumption, m3 / min;

α——Safety factor, it can take 1.2-1.5

n——the number of pulse valves;

q——Air consumption of each pulse valve, L / (valve.times);

T——ash cleaning cycle, min.

Note: The primary gas consumption of the pulse valve varies with the specifications of the pulse valve and the pressure of the dust cleaning gas source. For domestic 20mm and 25mm high pressure pulse valves, the air consumption is generally selected from 30-50L / (valve.times); for domestic 76.2mm low pressure pulses, the air consumption is generally selected from 150-250L / (valve.times). The imported pulse valve consumes about twice as much air as domestic valves.