The reason is as follows:
Always check the operation of control valve, electromagnetic pulse valve and a timer. Pulse valve diaphragm failure is a common failure, it directly influences the cleaning effect. Two prevent fire and explosion: in the exhaust gas of rotary cement kiln tail exhaust, coal mill waste gas discharged due to preparation containing CO, coal dust and other combustible material, in its content, dust concentration and a certain temperature will cause combustion and explosion accident, not only burned dust removal equipment, also affected the normal operation of the production mainframe, affected the dedusting efficiency of coke oven. The prevention of internal flow filter circuit. Because the dust source gas containing dust concentration is high, ( such as 20 g / M 3 ), a dew condensation preventing: in use to prevent gas in the bag chamber is cooled below the dew point, especially the use of coke oven in the negative pressure dust collector should be paid more attention to. Because the casing is often air leakage into the gas bag, room temperature below the dew point, the bag will be affected with damp, the dust is not loose, but sticky attached to the bag, put the fabric hole blocked, resulting in failure of the ash, coke oven collector pressure is too large, can not continue to run, some paste bag can't dust. To prevent condensation, must maintain the gas throughout the deduster and the system temperature is higher than the dew point temperature of 25~35 ℃( such as machine kiln grinding of the dew point temperature of 58 ℃, operating temperature should be 90℃), in order to guarantee the good use effect of bag. , the measures are as follows:
The addition of raw material yard. All in the production of cement raw materials, fuels and mixed material moisture range, if placed in a fixed pile to prevent rain shed, can greatly reduce the moisture content of materials, which are effective measures to decrease moisture of material. Compared with ordinary cement factory in the south of China, but the material stack shed some too small, and some are not, therefore, difficult to use dust of coke oven.
The leakage reduction. Air dust remover body part of the gap, the coke oven dust collector for air leakage should be controlled below 3.5%. The discharge of air leakage process equipment in the dust catcher system such as ball mill outlet closed unloading valve, the dust closed ash valve leakage, piping flanges, which are often ignored by maintenance personnel, therefore, increase the quantity of air leakage of unnecessary, deterioration of the operating conditions of dust collector coke oven.
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