A process of using cement clinker production line to treat domestic waste

Abstract

The invention discloses a technology for treating domestic garbage by use of a cement clinker production line. By adopting the technology, the domestic garbage can be treated in a cement kiln without influencing the production of cement clinker; the existing clinker production line can adapt to the treatment of domestic garbage by the kiln system simply through slight transformation, and a new cement line can be established for co-treatment of the garbage project; a waste gas exchange method is adopted, the kiln tail waste gas discharged from a bypass smoke outlet and the high-temperature waste gas in a garbage incinerator are used for generating electricity through the medium-temperature medium-pressure steam generated by the heat exchange of a waste heat boiler; the quantity of smoke discharged from the bypass smoke outlet is greater than or equal to the smoke quantity at a garbage waste inlet, thus the air quantity of the kiln system is balanced, chloride ions in the kiln tail waste gas can be discharged without reducing the yield, and the shortcoming that the kiln system is hard to arrange since a high-temperature smoke pipe for garbage incineration has a large diameter is avoided at the same time; moreover, the garbage residue after high-temperature calcination at the kiln tail is used as a cement raw material so as to realize waste utilization.

Description

technical field [0001] The invention relates to the technical field of domestic waste treatment, in particular to a process for processing domestic waste by using a cement clinker production line. Background technique [0002] At present, the cement clinker production line has been used to treat domestic waste. Due to the unique process environment characteristics of cement kiln system production, it is very suitable for processing urban domestic waste, decomposing harmful components in domestic waste, and burning waste Applied in cement production, the exhaust gas is treated to meet the national emission standards before being discharged. [0003] The existing treatment method is: incinerate the garbage through the garbage incinerator, enter the high-temperature gas into the decomposition furnace for decomposition, meet the emission standard, and discharge it together with the cement kiln exhaust gas. The problems existing in the existing cement kiln waste treatment proces...

AI Technical Summary

Problems solved by technology

The problems existing in the existing cement kiln waste treatment process are: after the pyrolysis or incineration of municipal solid waste enters the calciner, the air volume of the calciner increases, and the clinker output must be reduced to meet the process requirements; due to the chlorine in the waste incineration The content of ions is high. After the flue gas enters the decomposition furnace, the chloride ions are absorbed by the material. After the material enters the kiln, after the high temperature of 1200 ° C, the chloride ions are decomposed by high temperature, forming enrichment and crust at the kiln tail, resulting in abnormal kiln system. Production; the amount of high-temperature flue gas produced by waste incineration is large, which is directly sent to the decomposition furnace, the diameter of the pipe is too large, and the arrangement of the kiln tail is difficult

The process operation is complicated, the operation is difficult and time-consuming, and the municipal solid waste cannot be completely treated

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