System and method for collaborative garbage disposal of cement clinker production line

Abstract

The invention provides a system and a method for collaborative garbage disposal of a cement clinker production line. The system comprises a garbage incinerator (1), a flue gas pipeline (2), a decomposing furnace (3), a third air duct (4), a rotary kiln (5), a grate cooler (6), a warm air pipeline (7), an air supply pipeline (8) and an oxygen enrichment system (9). The oxygen enrichment system is arranged on the air supply pipeline of the garbage incinerator, an oxygen enrichment pipeline valve (10) is arranged between the air supply pipeline and the oxygen enrichment system, and a warm air pipeline valve (11) is arranged between the warm air pipeline and the air supply pipeline. The method includes that garbage is fed in the garbage incinerator, oxygen-containing hot gas and oxygen-enriched gas are mixed to be supplied to the garbage incinerator, oxygen content and flow of the oxygen-enriched gas are regulated through the oxygen enrichment pipeline valve and the warm air pipeline valve, the garbage is dried, burned and burned out through the garbage incinerator, combustion flue gas enters the decomposing furnace through the flue gas pipeline and then is disposed by a flue gas purification system, and garbage residues after combustion enter the rotary kiln or a stock dump directly.

Description

technical field [0001] The invention relates to a system and method for treating garbage, in particular to a system and method for treating garbage by means of oxygen-enriched combustion. The treated garbage can be urban garbage or industrial garbage. Background technique [0002] Municipal waste and industrial waste have complex sources and complex compositions, among which there are many toxic and harmful substances. Various methods have been used to deal with garbage, such as landfill, composting, heat treatment, worms, feeding of garbage, bacterial digestion, water-borne method, microwave treatment or classification recycling, comprehensive utilization and so on. The heat treatment method is the most thorough treatment method with the highest reduction ratio. At present, the incineration method is mainly used, and it is also a garbage treatment method commonly used in countries all over the world. It has the advantages of large processing capacity, good capacity reductio...

AI Technical Summary

Problems solved by technology

The incinerator incineration technology is suitable for garbage with high moisture content and low calorific value. The incineration of garbage is more thorough, but the treatment process requires combustion and is prone to produce dioxins; fluidized bed incineration technology has high heat intensity, suitable for low calorific value and high water content. It has the characteristics of high garbage size, stable operation, and simple structure, but there are disadvantages such as high size requirements for the waste into the furnace, complicated follow-up treatment, and high investment; the rotary kiln incineration technology has the characteristics of stable operation and tight sealing, but it needs auxiliary fuel and complicated follow-up treatment. and other shortcomings

These technologies are applied in co-processing of waste-to-energy plants and cement clinker production lines, but they all have problems such as low combustion efficiency, the need to supplement fuel, and the actual generation of dioxins.

[0003] In the co-processing of waste in the cement clinker production line, both the waste incinerator and the clinker production line need sufficient oxygen for the combustion process, and the two have the problem of competing for hot air; when the waste moisture is high and the calorific value is low, the waste It is difficult to increase the combustion temperature and flue gas temperature in the incineration equipment. If these problems are not solved, it will be difficult to ensure the efficient operation of the waste incineration equipment

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