A waste incineration power generation flue gas treatment device

Abstract

The invention relates to a flue gas treatment device for waste incineration and power generation. The flue gas generated by waste incineration and power generation passes through a flue gas semi-dry treatment device, a dry treatment device and a bag filter in sequence for treatment. A purging device is arranged on the lime silo of the slurry preparation device in the semi-dry treatment device, a plurality of lime slurry preparation tanks are arranged, and a plurality of screw quantitative feeders are correspondingly arranged to connect the lime silo discharge port and the lime slurry respectively. The feed port at the top of the preparation tank is provided with multiple inspection windows at the lower part of the lime silo. The first equal-diameter circular pipe section of the dry treatment device has the same pipe diameter, and the flue gas flows smoothly, which plays a role of voltage stabilization. After the pipe expansion section, the pipe diameter gradually increases, which slows down the flow velocity, and the elliptical pipe section installed in the variable diameter pipe expansion section has a better treatment effect and higher efficiency on the flue gas. The fly ash collected by the bag filter falls into the ash discharge device, and its structure prevents the fly ash from accumulating on the valve plate.

Description

technical field [0001] The invention relates to a waste incineration power generation flue gas treatment device, which belongs to the field of waste incineration flue gas treatment equipment. Background technique [0002] The flue gas generated in the process of waste incineration power generation needs to be treated because it contains a variety of toxic and harmful substances. In the semi-dry treatment stage, lime slurry spray is used for flue gas treatment. During the preparation process of lime slurry, single-channel structure is easy to block and cause poor powder transportation, resulting in the stop of pulping work and affecting the flue gas treatment operation. Moreover, lime powder is easily attached to the inner wall of the lime silo containing lime powder, resulting in agglomeration of the lime silo wall. The structural cross-sectional area of ​​the device in the dry treatment stage is basically unchanged, resulting in little change in the flue gas flow rate, whi...

AI Technical Summary

Problems solved by technology

However, since the fly ash falls on the valve plate in an irregular manner, it may fall near the rotating shaft of the valve plate, resulting in a short arm of force at the position where the fly ash accumulates, and there is not enough weight to press down on the valve plate for ash discharge, which may cause Cause fly ash to accumulate on the valve plate and be difficult to remove

Some electric flap ash unloading valves open the valve plate at a fixed frequency for ash discharge, but frequent opening of the valve plate causes heat loss in the flue, but if the frequency is reduced, it may cause fly ash to accumulate

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