Stainless steel wire mesh circulating water vapor membrane filter-bag type fine dust removal device for coal-fired flue gas

Abstract

The invention belongs to the technical field of dust removal for boilers, and particularly relates to a stainless steel wire mesh circulating water vapor membrane filter-bag type fine dust removal device for coal-fired flue gas. The stainless steel wire mesh circulating water vapor membrane filter-bag type fine dust removal device for coal-fired flue gas comprises a bag house, multiple stainless steel wire mesh filter-bags are vertically arranged in the bag house, and a water spray ring is arranged corresponding to the upper opening of each stainless steel wire mesh filter-bag. An ultrafine hole filter cloth of a traditional filter-bag with a large resistance is converted into a stainless steel wire mesh with a relatively small resistance, and due to the water spray ring arranged corresponding to an upper opening of each stainless steel wire mesh filter-bag, water membranes / vapor can be fully distributed on micropores of the mesh so as to intercept fine particles in a diagram-used wet method or intercept soluble micro-particles in flue gas into a water body in a water soluble mode, thereby achieving an effect of reducing the emission concentration of PM2.5. A finer dust removal index of less than or equal to 30 mg / m<3> required by the country can be realized basically, and the investment cost and operation cost of the dust removal device disclosed by the invention are far lower than those of a bag-type dust removal device.

Description

technical field [0001] The invention belongs to the technical field of bag type dust removal for boiler flue gas. Specifically, it is a coal-fired flue gas stainless steel wire mesh cloth circulating water vapor membrane filter bag type fine dust removal equipment. Background technique [0002] In the existing technology, the Chinese government has intensified the efforts to control and treat PM2.5-PM10 fine particles in response to the increasing smog pollution. Therefore, some environmental protection supervision departments in various places in my country believe that only bag dust removal can achieve the goal of controlling PM2.5. This requires that the flue gas of coal-fired boilers must use bag dust removal or electric bag dust removal for the first stage of treatment, and then go through the desulfurization required in the past and the next step of denitration and other treatment procedures, otherwise the environmental impact assessment department will not approve th...

AI Technical Summary

Problems solved by technology

However, the existing domestic glass fiber bag filter (including air intake, exhaust, back blowing or vibration cleaning system, bag room, ash discharge system, etc.) Or circulating fluidized bed boiler matching, because the power plant can control the smoke temperature stably and has economic strength support, so there are good application examples, but when it is used as a supporting application for central heating and production steam layer combustion boilers, it has been verified There are: open fire particles burning bags in the flue gas; wet flue gas and dust paste bags; running resistance gradually increases; excessive load of the induced draft fan of the boiler leads to unstable combustion of the boiler; investment and operating costs are generally expensive; the furnace unit is difficult to bear and other problems

In particular, trying to use the micropores of the glass fiber bag to remove PM2.5 particles in the flue gas has little practical effect

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