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Pulse bag filter because of improper installation or operation may lead to damage to the filter bag, then we analyzed according to the actual situation of the project. Found that in half a year of operation in the filter bag damage is more, but also because of the resulting emission concentration does not meet the standard, then the unit after several downtime maintenance on the filter bag damage causes were analyzed.
1、 Filtration wind speed
In the dust collector design, if the excessive pursuit of small size, low cost is to choose too high a filtration wind speed, easy to cause the operating resistance to increase the frequency of clearing, thus greatly shortening the service life of the filter bag. Dust collector does not clear the dust when the filter wind speed selection 0.66 m/min, wind speed in a reasonable range is also to avoid the filter wind speed is too high will cause adverse effects on the filter bag.
2、Temperature influence
The service life of different filter bag materials are different, the overall service life of the filter bag material in the coating treatment is not less than 3 years, and the normal permissible flue gas operating temperature is within 100 ~ 130 ℃, and even said that the instantaneous temperature allowed by the pulse bag filter can reach 180 ℃. When the operating temperature is too high, the actual exhaust temperature is controlled at about 160℃, not exceeding the peak instantaneous temperature and continuous operation temperature of PTFE, avoiding the filter bag being burnt in a short time because of the high temperature of the flue gas. At the same time, the exhaust temperature is too low, water vapor in the flue gas condensation through the filter bag attached to the filter bag will also cause the filter bag plate.
3、 Blowing wear
When the blowing pressure is too high, it will increase the impact of the soot cleaning airflow on the filter bag, resulting in scouring wear; blowing time interval is set unreasonably frequently blowing; blowing compressed air quality is not qualified with water with oil so long time will cause the filter bag slate.
4、 Oil adhesion
Due to frequent boiler ignition start and low load operation, need to throw oil for a long time, then there will be unburned oil adhering to the filter bag, so that the filter bag gradually lose activity, thus causing serious damage.
Must look at his function unloader is divided into many kinds of models are not the same, some are high temperature resistance, some are wear-resistant, must look at this standard, can not buy wrong. Poor performance must not unloader is also divided into a lot of performance, poor performance must not, the performance of the unloader is very important, the performance of the product is not good, there may be a decline in the overall performance, and sometimes also and other equipment does not match. First look at their own manufacturers, in the selection of unloader whether you buy a dust collector or unloader, you should first look at their own manufacturers to see what model of unloader is suitable for, in making a decision, which is very important.
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Production base: Zongdian Industrial Zone, Qi County, Kaifeng City