Dust removing device for flue gas discharged from boiler

Abstract

The invention discloses a dust removing device for flue gas discharged from a boiler. The dust removing device comprises a flue gas inlet pipe, a filter box, a desulfurization tank and a flue gas exhaust pipe, wherein a flue gas outlet at the right side of the flue gas inlet pipe is connected with a waste heat recovery unit; the flue gas outlet end of the waste heat recovery unit is connected witha flue gas inlet at the left end of the filter box through a pipeline; and the lower end of the filter box is provided with an ash collecting hopper connected with the inner cavity of the filter box.According to the invention, a flue gas distribution arranged in a desulfurization mechanism is used for discharging flue gas conveyed by a fan into clarified lime water in uniform and dispersed way through exhaust vents in a plurality of exhaust pipes; a submersible motor and a propeller connected with the output shaft of the submersible motor stir the clarified lime water to allow the clarifiedlime water to flow downward so as to further disperse the flue gas in the clarified lime water sufficiently, thereby greatly improving the reaction efficiency of the clarified lime water with sulfur dioxide in the flue gas, enhancing desulfurization effect, and realizing while achieving further filtration of dust in the flue gas while realizing desulfurization.

Description

technical field [0001] The invention relates to the technical field of flue gas dedusting, in particular to a boiler exhaust flue gas dedusting device. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with certain thermal energy, and a large amount of fuel will be burned during the heating of the boiler. The fuel of some boilers is mainly coal, and the flue gas of coal combustion will produce a large amount of dust and sulfur dioxide, which will seriously pollute the air and cause the deterioration of the ecological environment. Therefore, the treatment of boiler flue gas is particularly important. [0003] The existing boiler flue gas dedusting device cannot effectively recycle the waste heat in the flue gas, and the dust removal efficiency for the dust in the flue gas is not...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a boiler exhaust gas dust removal device, which aims to improve the existing boiler flue gas dust removal device for the poor recovery rate of waste heat in the flue gas, time-consuming and laborious cleaning of filter components, inconvenient disassembly and replacement of filter components and The problem of poor desulfurization effect

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