Working principle and selection principle of cyclone dust collector
Cyclone dust collector is composed of cylinder, cone, intake pipe, exhaust pipe and discharge pipe. The working principle of cyclone dust collector is to make the dust-bearing air flow to rotate, with the help of centrifugal force to separate the dust particles from the air flow and collect them in the wall, and then with the help of gravity to make the dust particles fall into the ash bucket.
The selection principle of cyclone dust collector has the following aspects:
1. The gas quantity of cyclone dust collector should be consistent with the actual amount of dust-containing gas to be treated. The diameter of the dust collector should be selected as small as possible. If the required air volume is large, it is appropriate to use several small diameter cyclone dust precipitator in parallel; If the gas volume is consistent with the multi-pipe cyclone dust collector, it is appropriate to choose the multi-pipe cyclone dust collector.
2, cyclone inlet wind speed to maintain 18-23m/s, lower than 18m/s, the dust removal efficiency decreases; When the dust removal efficiency is higher than 23m/s, the improvement is not obvious, but the resistance loss increases and the power consumption increases a lot.
3. When selecting the dust collector, it is necessary to consider the resistance loss and structure form according to the working condition, so as to reduce its power consumption as far as possible and facilitate manufacturing and maintenance.
4. The dust particles that can be collected by the cyclone dust collector should be equal to or slightly less than the dust calendar of the gas being treated.
5. When the temperature of dusty gas is very high, attention should be paid to heat preservation to avoid moisture condensation in the dust collector. If the dust does not absorb water. When the dew point is 30~50℃, the temperature of the precipitator should be about 30℃ higher. If the dust is more absorbent and the dew point is 20~50℃, the temperature of the dust collector should be 40~50℃ higher than the dew point temperature.
6, cyclone dust collector structure sealing is better, to ensure that there is no air leakage, especially the negative pressure operation, more attention should be paid to the reliability of discharge cable wind device.
7, flammable and explosive dust (such as pulverized coal) should be equipped with explosion-proof devices.
8. When the dust viscosity is small, the allowable dust mass concentration is related to the cyclone diameter, that is, the larger the diameter, the greater the allowable dust mass concentration.
