(1) high dust removal efficiency: electrostatic precipitator can improve dust removal efficiency by increasing the number of electric fields, increasing the cross-sectional area of electric fields and improving the quality of power supply, thus meeting any required dust removal efficiency. It still has high dust collection efficiency for fine dust with particle size less than 10 micron.
(2) The running resistance of the equipment is small and the total energy consumption is low: the running resistance of the electrostatic precipitator is 200-300 Pa, which is about 1/8 of that of the bag filter and 1/4 of that of the electric bag filter.
(3) Large flue gas treatment capacity: At present, the maximum cross section of a single electrostatic precipitator reaches 800m2.
, the flue gas treatment capacity reached 3 million m3.
/h .(4) The operating temperature is high, which can meet different operating conditions: the general electrostatic precipitator can be used to treat 350 O.
Dust below C (5) Low maintenance cost and long service life of equipment: Due to the mature design and manufacturing technology of electrostatic precipitator, it is basically unnecessary to replace some wear-resistant and vulnerable parts during the first overhaul of electrostatic precipitator in newly-built power plant. After more than ten years of operation, a large number of electrostatic precipitators still have good inner plates and polar lines, and the service life of equipment is longer than that of other electrostatic precipitators.
Second, the bag filter
Bag filter is not affected by the physical and chemical characteristics of flue gas and is suitable for all kinds of coal.
Moreover, the dust removal efficiency is high, and the emission concentration is lower than 50mg/Nm3, which has developed rapidly in previous years. Generally, the pressure loss of bag filter is less than 2000Pa, so the system resistance is large and the fan energy consumption is high. For special dust, such as dust with low sulfur and high specific resistance, high SiO2 _ 2 _ 2 and high Al _ 2O _ 3, and occasions where there is a danger of CO explosion and it is difficult to meet the standard with conventional electrostatic precipitator, bag dust collector can be used.
Third, the electric bag dust collector
Advantages of electric bag dust collector
The electric bag composite dust collector collects 80 ~ 90% of flue gas dust through the former electrostatic precipitator, and a small amount of residual dust is collected in the filter area of the latter filter bag. At the same time, the charged dust generated by the pre-electric field can effectively improve the filtration characteristics of the dust layer deposited on the surface of the filter bag, greatly improve the permeability and dust removal performance of the filter bag, and thus achieve the effect of low resistance and high efficiency dust removal. This technology combines the two characteristics of electric dust removal and filter bag dust removal. The dust removal efficiency is not affected by coal type, flue gas conditions and fly ash characteristics, and the emission concentration can be kept below 50mg/Nm3 or even 30mg/Nm3 for a long time. Compared with the pure bag filter, the filter can maintain a lower running resistance during operation.