Method and system of increasing temperature of garbage piles in leachate sewer of garbage power plant in winter

Abstract

The invention discloses a method and a system of increasing temperature of garbage piles in a leachate sewer of a garbage power plant in winter and belongs to the field of household garbage incineration power generation. The method includes collecting leachate in the leachate sewer; heating the leachate collected; spraying the heated leachate to the garbage piles in the leachate sewer. The system comprises a leachate collecting pond connected with the leachate sewer, cold leachate conveying pumps, a heat pump heating device, hot leachate conveying pumps and a leachate spraying-back device. According to the arrangement, the heat pump technology is adopted to use low-temperature heat energy of circulating water of a condenser of a power generation plant, and accordingly the leachate is heated and prayed back to the garbage piles in the leachate sewer; in this way, increased is the temperature of the garbage piles in the leachate sewer of the garbage power plant in northeast cold areas in winter, and fermentation and leaching of the household garbage in the sewer are facilitated, thus heat value of the garbage incinerated in the furnace is increased, additive amount of auxiliary fuel is reduced and stable and continuous running of the garbage power plant is facilitated.

Description

technical field [0001] The invention relates to the technical field of waste incineration power generation, in particular to a method and a system for increasing the temperature of a waste pool stockpile in a waste power plant in winter. Background technique [0002] At present, domestic waste incineration power plants are all equipped with garbage pools for storing garbage. The original intention of the setting is to avoid the incinerator outage due to insufficient amount of incinerated garbage in a short period of time, resulting in an increase in the number of startups and shutdowns. For the problem that the smoke pollutants are difficult to control, the effective volume of the garbage pool is usually determined according to the garbage margin of 2 to 3 days. Domestic garbage in my country generally has the characteristics of "high moisture and low calorific value". In order to ensure that the garbage can be fully burned in the incinerator, it needs to be stacked and ferm...

AI Technical Summary

Problems solved by technology

Usually in spring, summer and autumn, the temperature in the garbage and the warehouse can meet the requirements of fermentation and drainage, but in winter, especially in the cold northeast, the temperature of the garbage entering the factory is low, and even ice and snow are mixed in it, resulting in a low temperature in the garbage pool , the fermentation and drainage effects are poor, which greatly reduces the calorific value of the waste entering the furnace, which will seriously affect the stable and continuous operation of the system

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