Cement kiln co-processing combustible waste system that can bypass waste heat power generation

Abstract

The invention relates to a system for combustible waste co-processing in cement kiln with bypass exhaust and waste heat power generation and aims to provide a system with high ability to process the combustible waste and guarantee production quality of the cement. The technical scheme includes that the system comprises a generating device, a kiln tail preheater, a kiln head waste heat boiler, a kiln tail waste heat boiler, a collecting device, an incinerator, a raw material vertical mill and a bypass exhaust device; the kiln head waste heat boiler and the kiln tail waste heat boiler are connected with the generating device, a gas inlet of the kiln head waste heat boiler is connected with a waste gas outlet of a clinker cooler, a waste gas outlet of the kiln tail preheater is connected with a gas inlet of the kiln tail waste heat boiler, and a discharging outlet of the kiln tail preheater is connected with a feeding inlet of a feed-end chamber of a rotary kiln; and a smoke outlet of the incinerator is connected to a decomposing boiler of the kiln tail preheater.

Description

technical field [0001] The invention relates to a combustible waste system, in particular to a cement kiln co-processing combustible waste system. Background technique [0002] Combustible waste refers to solid and semi-solid waste materials that have a certain calorific value and can be burned under certain conditions (the definition abroad is more extensive, and the waste produced by animal activities is more extensive) It also belongs to this category), colloquially, it is "garbage" with calorific value. Combustible waste mainly includes municipal solid waste, house straw, sludge, discarded plastic or rubber products, damaged wooden furniture, animal carcasses, spoiled food, human and animal excrement, etc. [0003] In the EU, there have been several changes in the treatment of combustible wastes such as municipal solid waste and sludge: at the beginning, it was mainly landfill and incineration, and the ash after incineration was also landfilled; in the late 1990s, sever...

AI Technical Summary

Problems solved by technology

[0007] The co-processing of combustible waste in cement kilns will bring a large number of harmful components (such as potassium, sodium, chlorine, sulfur, etc.) that affect the quality of cement. At present, the ability of cement kilns to co-process combustible waste without affecting the quality of cement is limited. ; Therefore, in order to improve the ability of cement kilns to co-process combustible wastes, some technologies adopt the method of bypass ventilation, but bypass ventilation will cause additional energy loss, so the ventilation volume is generally controlled at the kiln tail outlet of the total flue gas Amount of 5%-10%, still slightly insufficient

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