Ammonia gas recovery structure and ammonia gas recovery method for fly ash maintenance workshop

Abstract

The invention provides an ammonia gas recovery structure and an ammonia gas recovery method for a fly ash maintenance workshop. The body health of production personnel in the workshop is guaranteed, corrosion of equipment in the workshop is reduced, ammonia gas can be recycled, and secondary pollution is reduced. An ammonia gas detector is mounted in the fly ash curing workshop; a collecting air pipe mounted in the fly ash maintenance workshop is connected with a washing tower; a first-stage packing section, a first-stage spraying section, a second-stage packing section, a second-stage spraying section and a demisting plate are sequentially arranged in the washing tower from bottom to top; the liquid storage tank is connected with a spraying water pipe through a circulating pump, and the spraying water pipe is connected with the first-stage spraying section and the second-stage spraying section; the desalted water input pipeline is connected with the liquid storage tank; the washing tower is connected with the inlet of a centrifugal fan, and the centrifugal fan is connected with the fly ash maintenance workshop; the liquid storage tank is connected with the desalted water pump, thedesalted water pump is connected with the filter, the filter is connected with the desalted water tank, the desalted water tank is connected with the transfer pump, and the transfer pump is connectedwith the SNCR system softened water tank.

Description

technical field [0001] The invention relates to an ammonia gas recovery structure and an ammonia gas recovery method in a fly ash maintenance workshop, which are mainly used in a fly ash maintenance workshop of a domestic waste incineration plant. Background technique [0002] In recent years, my country's garbage production has been increasing day by day. If a large amount of urban domestic garbage is not effectively treated, it will cause serious pollution to the urban ecological environment and the surrounding water, air, and soil. Therefore, many garbage incineration plants have also been built accordingly. stand up. Fly ash produced by waste incineration is hazardous waste, containing a large amount of heavy metals, which is extremely harmful to human body and environment. Therefore, it is necessary to stabilize the heavy metals in the fly ash to meet the landfill standards before landfilling. [0003] In the flue gas purification process of waste incineration, ammonia...

AI Technical Summary

Problems solved by technology

[0004] In many waste incineration plants, the fly ash is chelated in the incineration room and then transferred to the fly ash maintenance workshop for storage, maintenance, sampling and testing. A large amount of stabilized fly ash is stored in the fly ash maintenance workshop, resulting in ammonia odor in the fly ash maintenance workshop. Very strong, beyond the acceptable range of the human body, so that many workers' eyes and noses will be hurt by the irritating gas, and suffer from respiratory mucosal diseases

In addition, the ammonia content is too high, and there are certain safety hazards.

[0005] In the existing technology, dilute acid is often used to neutralize the ammonia gas in the fly ash maintenance workshop. Although this method can efficiently remove ammonia gas, it consumes dilute acid resources and the acid-containing wastewater generated needs further treatment.

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