● less ancillary equipment, investment savings, technical requirements are not as high as the electrostatic precipitator;
● can catch dust with high specific resistance, difficult to recover dust;
● stable performance of bag dust collector, good adaptability to load change, easy operation and management, especially suitable for collecting fine and dry dust, dry dust collected is easy to handle and recycle;
● can be suitable for the whole process of production dust new theory, reduce total emissions;
● bag filter is suitable for cleaning dust gas containing explosion danger or spark.
Faults of boiler bag filter
● used to deal with high relative humidity of dust gas, should take insulation measures (especially in winter), so as not to cause "paste bag" due to condensation.
● for the purification of corrosive gases, should choose the appropriate corrosion resistant filter material, for the treatment of high temperature flue gas should take cooling measures. Reduce the smoke temperature to the long-term operation of the filter bag can withstand the temperature below, and as far as possible to use high temperature resistant filter material.
● large resistance, the general pressure loss is 1000 ~ 1500Pa.
Advantages of electric precipitators
● dust removal efficiency can collect fine dust below 1um, which can control a reasonable dust removal efficiency.
● handle large amount of smoke, can be used at high temperature (up to 500℃), high pressure and high humidity occasions, can be continuous operation.
● with the characteristics of high efficiency and low resistance, the pressure loss of the precipitator is only 100 ~ 200Pa.
Faults of electric precipitators
● the equipment is large, steel consumption, needs high voltage transformer and rectifier equipment, usually the output peak voltage of high voltage power supply equipment is 70 ~ 100KV, so the investment is high.
● high technical level requirements for manufacturing, installation and management.
Low dust removal efficiency is affected by the dust resistivity is big, general comparison resistance less than 104 ~ 105 Ω · cm or greater than 1012 ~ 1015, Ω cm, dust, if do not take action, the dust removal efficiency will be affected.