Cement kiln co-processing bypass air release system

Abstract

The invention discloses a cement kiln co-processing bypass air release system and relates to the technical field of sludge treatment. The cement kiln co-processing bypass air release system comprisesa rotary kiln, a kiln tail smoke chamber and a kiln end preheater; a waste gas opening is formed in the upper side part of the kiln tail smoke chamber; the inner wall of the waste gas opening is connected with an air inducing pipe; the tail end of the air inducing pipe is connected with a bypass air release waste heat boiler; the kiln tail preheater comprises a decomposing furnace and a multi-stage cyclone; the multi-stage cyclone is connected with a kiln tail SP waste heat boiler; the kiln tail SP waste heat boiler is connected with a grate cooler; a feed port of the kiln tail smoke chamber in the rotary kiln is connected with a discharge port of the kiln tail preheater; and a waste gas outlet of the kiln tail preheater is connected with the kiln tail SP waste heat boiler. According to the cement kiln co-processing bypass air release system, through the effects of the air inducing pipe, the bypass air release waste heat boiler, the multi-stage cyclone, the kiln tail SP waste heat boiler and the grate cooler, dust falling and dust collection of the smoke are facilitated in the heat exchange process of the boiler, the influence of smoke dust on operation of the kiln tail waste heatboiler is avoided, energy consumption can be reduced, and stable operation of the kiln tail SP waste heat boiler is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, in particular to a bypass ventilation system for collaborative treatment of cement kilns. Background technique [0002] Co-processing of urban domestic waste in the cement industry generally involves drying and dehydrating primary domestic waste and sending it to a decomposition furnace for combustion or directly sending domestic waste into a gasifier for gasification and then entering a decomposition furnace for incineration; in the traditional production process, due to The volatilization of harmful elements causes skinning and blockage, which affects the normal operation of the cement kiln system. Generally, a bypass ventilation system is required to release the flue gas at the kiln tail outside the kiln. At present, bypass ventilation technology has been widely used at home and abroad to solve the problem of harmful component circulation and reduce the content of harmful components i...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a bypass ventilation system for collaborative processing of cement kilns. The end of the induction pipe is connected to the bypass ventilation waste heat boiler, and the multi-stage cyclone is sequentially connected to the kiln tail SP waste heat boiler and grate cooler, which solves the problem. The flue gas of some bypass windproof system boilers contains a lot of dust during the heat exchange process, which is easy to affect the operation of the waste heat boiler at the kiln tail, and ultimately affects the stable operation of the cement production system

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