Quenching device for processing smoke generated by burning garbage and smoke processing system thereof

Abstract

The invention relates to a quenching device for processing smoke generated by burning garbage and a smoke processing system thereof. The quenching device is provided with an inlet pipeline, a quenching pipeline, an outlet pipeline, a spray cooling controller and a temperature measurer, wherein a first sprayer is installed on the inlet pipeline, and the water spraying quantity of the first sprayer is fixed; a second sprayer is installed on the outlet pipeline, and the water spraying quantity of the second sprayer is regulated and controlled by the spray cooling controller according to the temperature data fed back by the temperature measurer; the quenching pipeline is communicated with an ash bucket arranged below the quenching pipeline; the smoke processing system is provided with an acid removing tower and a bag-type dust remover; the outlet pipeline of the quenching device is communicated with an inlet end of the acid removing tower; and the temperature measurer is installed on a pipeline that the acid removing tower is connected with the bag-type dust remover. By adopting the quenching device and the smoke processing system of the invention, ash can not be deposited on an inner wall of the acid removing tower easily, the maintenance cost is lower, and the quenching device has simple installation and lower manufacturing cost.

Description

technical field [0001] The invention relates to a quenching device and a flue gas treatment system for waste incineration flue gas treatment, which are mainly used in the flue gas treatment of rubbish incineration. Background technique [0002] At present, the most common method of garbage disposal is garbage incineration, using garbage incinerators to incinerate municipal solid waste, and the heat generated can be used to generate electricity. However, the waste incinerator will produce a large amount of flue gas during the incineration process, and the flue gas contains acid gas (SO 2 , HCL, HF, etc.), dioxin-like organic pollutants, heavy metals (Cd, Hg, Pb, etc.), direct discharge into the atmosphere will cause local acid rain, greenhouse effect, etc., and cause serious pollution to the atmospheric environment. [0003] In order to remove the pollutants in the flue gas, the flue gas desulfurization process is generally used at the tail of the boiler. At present, the sem...

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Problems solved by technology

[0004] However, in this process, because the cooling of the flue gas and the deacidification reaction of the material are carried out in the reaction tower, the HCL produced in the waste incineration will be combined with Ca(OH) 2 The reaction produces calcium chloride. Calcium chloride is easy to crystallize and precipitate hexahydrate at low temperature. When heated to 260°C, it becomes white porous anhydrous calcium chloride. Calcium chloride is extremely deliquescent. Under the circumstances, it is easy to absorb moisture and accumulate into powder, resulting in dust accumulation on the inner wall of the reaction tower.

The flue gas of waste incineration also contains a large amount of dust. The dust is extremely hygroscopic and easily adheres to the inner wall of the reaction tower to form ash. Every one or two months, a thick ash will form on the inner wall of the reaction tower. layer, it must be cleaned before it can continue to be used, because the dust accumulation is serious and the cleaning is very difficult, which increases the maintenance cost of the reaction tower

[0005] The published description of the invention patent application with the application number 200810120293.1 discloses a semi-dry flue gas purification device with an independent desuperheating tower. The flue gas cooling is carried out in the desuperheating tower, and the deacidification reaction is carried out in the reaction tower, effectively It solves the problem of fouling on the inner wall of the reaction tower and the sticky bag of the bag filter, but the production cost of the desuperheating tower is relatively high. The second spray gun is set at the flue gas inlet of the reaction tower, and there is still water mist and smoke The dust in the air deliquesces when it encounters water mist and still accumulates in the reaction tower, which increases the maintenance cost of the reaction tower

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