A pretreatment method for waste incineration in alpine underdeveloped areas

Abstract

A waste incineration pre-treatment technological method for alpine underdeveloped areas comprises the steps of manual sorting of bulky crude waste, bag tearing and ice breaking, screening, magnetic separation and water seepage in a waste storage pit. In the step of manual sorting, the bulky waste is manually separated from waste; in the step of bag tearing and ice breaking, waste bags are torn, and ice blocks and ice lumps in the waste are broken up by beating; in the step of screening, the waste is screened into oversize products and undersize products; the undersize products are mainly composed of dust and are subjected to landfill treatment after magnetic separation, and the oversize products are fed into the waste storage pit for water seepage after magnetic separation; the ferrous metal obtained through magnetic separation is collected in a centralized mode for sale. The waste incineration pre-treatment technological method has the advantages that the ice blocks and the ice lumps can be fully melted after being broken by beating, so the water content of the waste put into a furnace is lowered; as the dust in the waste is screened out, the incineration heat value is increased remarkably; the fault rate of equipment can be lowered after the ferrous metal is removed from the waste put into the furnace; accordingly, the economic benefits of a waste incineration power plant are improved remarkably.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to the technology of garbage incineration pretreatment. Specifically, it is the pretreatment process of domestic waste in waste incineration power plants before entering the furnace. It is a process that increases the calorific value of waste incineration and solves the technical problem that waste cannot be normally burned in waste incinerators in cold and underdeveloped areas in winter. Background technique [0002] In recent years, the treatment method of waste incineration power generation has developed rapidly and has become one of the main ways to deal with municipal solid waste in my country. Domestic garbage in the alpine regions with underdeveloped economy in my country has the following characteristics: [0003] 1. Garbage has more ash content and low calorific value, especially in the winter heating period, the content of dust and ice water is greater, and the ...

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Problems solved by technology

[0005] 3. Garbage contains a certain amount of ferrous metals

[0007] 1. The ash and soil components in the garbage are non-combustible inorganic substances, which will reduce the combustion calorific value of the garbage, causing the garbage to be unable to ignite and burn normally in the incinerator, and also play a role in preventing combustion, absorbing heat and wearing the furnace during the garbage incineration process A series of negative effects, such as emission, reduces the economic benefits of waste incineration power plants;

[0008] 2. In winter, the food waste and food waste in the garbage bag will freeze into blocks

Due to the low temperature in the garbage storage pit in winter, the water in the food waste components frozen into blocks seeps out in the garbage storage pit for a much longer time than in other seasons, and even the garbage entering the furnace is caused by more moisture than other seasons. The calorific value of combustion decreases, and the garbage cannot be burned normally in the furnace.

[0009] 3. The ferrous metal in the garbage will collide with the grate, or even get stuck in the crack of the grate, causing shutdown accidents

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