Experimental Study On The Effect Of ESP On Removel Performance And Setting And Characteristics Of Fine Particles

Haze pollution (PM2.5) is becoming more and more serious, which is not only a serious health hazard, but also one of the main reasons for the low visibility of atmosphere. A lot of dust emissions from coal-fired boiler are an important source of fine particulate matter (PM2.5) pollution. To meet the new air quality standards, reducing the risk to human health, the control of coal-fired boilers PM2.5 is needed. Compared with the traditional dust technology, electric bags composite dust technology has obvious advantages, "ESP-Pre Charged dust-dust bag" integrated, fine particle coagulation, large processing capacity, filter effects and low resistance. Therefore, study of the mechanism of electrical dust bags composite technology controlling PM2.5 emissions and optimization of control device is of a practical significance.In this work, the experimental system ESP complex analog Including analog flue gas generator, ESP, control unit, analyze test device front ESP fabric filter unit was designed and constructed, aiming to study the impact of electric field on properties and condensate removal of fine particles,Simulated flue gas generating device is mainly composed of air compressor, dust aerosol generator RBG-1000, induct draft fan, inverter and wind speed measuring instrument. ESP system mainly includes pre-charge zone and ESP area. Pre-charge zone output voltage 0-125kV, which can enable the automatic tracking, and output current 0-15mA. ESP area can achieve continuously adjustable voltage 0-100kV, and output current 0-10mA. Analysis test device consists of sampling gun (with PM10 cutter), FPS-4000 fine particulate matter sampler, ELPI electronic low-pressure impactor and computer. The control device can enable the entire experimental system closed, providing a theoretical basis for and efficient removal of fine particles over electric fabric filter,for improving the removal efficiency of fine particles 。The voltage, different discharge electrode, pre-chagge and the number of discharges of dust concentration on removal efficiency of fine particles PM10 was studied on ESP complex experimental system. And the effective migration velocity was calculated, and its coagulation properties were evaluated by measuring the charge on the particles of different size segments electricity. Results showed that 1) the power source filter constant in a higher operating voltage could enhance the level of fine particulate removal efficiency PM2.5; 2) The higher split four barbed wire showed better removal efficiency which could meet the need for removal of fine particles among the two commonly used discharge current industrial pole; 3) The impact of number of discharge electrode on small sizes electrode removal efficiency was greater, increasing the number of discharge electrode improved the removal efficiency of fine particles; 4) Increasing the voltage can improve the migration velocity of fine particles (0.1-1μm);5) pre-charge could improve the removel efficiency of the particles 6) As a constant current source for ultrafine particles precipitator power consumption is very low charge. The overall load power consumption of less than 5 units, the coagulation of ultra thin and weak particle was weak. Improving the constant current power supply voltage, changing discharge electrode type and increasing the number of discharge electro could not increase the number of sub-charge quantity of fine particles effectively, and thus could not enhance the properties of particle coagulation. Dutch electricity was improved, and capacity of coagulation was enhanced for the fine particles ranging from 1 to 2.5 μm.