Granular quicklime fixed bed dehydration and deodorization system and operation method thereof

Abstract

The invention relates to the field of household garbage disposal, in particular to a granular quicklime fixed bed dehydration and deodorization system and an operation method thereof. The system comprises an alkali liquor absorption tower, a granular quicklime fixed bed, a forced ventilation module and a circulating water heat exchange module, the granular quicklime fixed bed comprises a quicklime drying room and a dust removal room, the quicklime drying room is mainly used for removing residual moisture in circulating air and increasing the temperature of the circulating air, and the dust removal room is mainly used for intercepting and separating calcium hydroxide powder generated by reaction of quick lime and water vapor. The circulating water heat exchange module is regulated and controlled through feedback of a temperature sensor, and then the composting environment of a subsequent aerobic composting reactor is regulated and controlled. The system integrates multiple functions of circulating water heat exchange accurate temperature control, circulating air, water content control and cyclic odor absorption and degradation, so that secondary pollution and zero emission in the domestic garbage biological treatment process are achieved, meanwhile, the operation energy consumption of the treatment system is greatly reduced, and the operation cost is effectively saved.

Description

technical field [0001] The invention relates to the field of domestic waste treatment and disposal, in particular to a granular quicklime fixed bed dehydration and deodorization system and an operating method thereof. Background technique [0002] With the development of my country's economy and the improvement of people's living standards, the amount of domestic waste generated in my country has increased year by year. The "2019 China Statistical Yearbook" shows that in 2018, the total amount of domestic garbage cleared and transported in my country was 228.018 million tons, of which about 108 million tons were perishable organic waste. In addition, there are 27,000 informal landfills and more than 1,600 regular sanitary landfills in my country, and the total amount of garbage in stock has reached 8 billion tons. A large number of cities are faced with insufficient landfill storage capacity, difficulties in selecting new landfill sites, and confusion about the resistance o...

AI Technical Summary

Problems solved by technology

[0007] The dehydration and deodorization and temperature control methods of the existing domestic garbage aerobic biological treatment technology are relatively extensive, which cannot provide a good environment for the subsequent aerobic biological reaction. The present invention provides a granular quicklime fixed bed dehydration and deodorization system. After the forced ventilation module takes out the moisture and odor during the biodegradation process of domestic garbage, the odorous gas in the circulating air is removed through the lye chemical absorption method, and the moisture in the circulating air is removed in conjunction with the lye temperature difference dehydration and quicklime chemical dehydration ;Reasonably distribute the two-stage dehydration amount by controlling the temperature drop of the circulating air in the lye absorption tower to reduce the consumption of quicklime, and design the circulating water heat exchange module to make full use of the reaction heat, and finally achieve the purpose of dehydration and deodorization with zero waste output, improving It solves the problems of poor temperature control and poor dehydration efficiency, and provides a good environment for subsequent aerobic biological reactions

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