Method and system for separating waste for cement production

Abstract

The invention discloses a method and system for separating waste for cement production. The method comprises the following steps: firstly, separating the waste into large-grain waste and small-grain waste, then separating high-temperature flue gas and inorganic ash from the large-grain waste by heating and gasification, then conveying the high-temperature flue gas into a decomposition furnace, andconveying the inorganic ash, used as a cement kiln raw material, into a batching system. The system comprises a sieving machine; a material inlet of the sieving machine is communicated with a waste collection chamber, and a first material outlet of the sieving machine is communicated with a material inlet of a gasification furnace; a gas outlet of the gasification furnace is communicated with a high-temperature flue gas inlet of the decomposition furnace; a material outlet of the gasification furnace is communicated with a material inlet of the batching system; a second material outlet of thesieving machine is communicated with a material inlet of the decomposition furnace. According to the method and the system which are disclosed by the invention, by out-of-kiln cold and hot dual separation of the household waste, the phenomenon that the household waste with factors such as high water moisture, low heat value and non-uniform particle size is directly put into the kiln is avoided, and dioxin can be fully burnt.

Description

technical field [0001] The invention relates to a waste disposal method and system thereof, in particular to a method and system for separating waste into cement production. Background technique [0002] With the rapid development of urbanization and the improvement of people's living standards, my country's urban waste, such as: domestic garbage and municipal sludge is increasing rapidly. The removal and transportation of these wastes has become an important issue restricting the sustainable development of cities. Due to the complex components of domestic waste, low calorific value and high water content, improper treatment will cause secondary pollution. The current domestic waste and sludge treatment technologies mainly include landfill, composting, and incineration for power generation, but it is difficult to achieve terminal disposal, and secondary pollution exists to varying degrees. Especially for garbage sorting, it is difficult to guarantee the quality of sorting ...

AI Technical Summary

Problems solved by technology

However, due to factors such as moisture and calorific value of the waste itself, it is directly put into the kiln for disposal, which has a great impact on the operation of the cement kiln.

[0004] Specifically, in the prior art, waste is directly sent into the cement kiln, resulting in waste, such as: domestic waste due to factors such as high moisture content, low calorific value, and uneven particle size, which causes unfavorable operating conditions of the cement kiln impact, unable to achieve mass disposal of waste, unable to achieve the purpose of saving energy

Unable to ensure complete incineration of dioxins in garbage

Images