Alkaliferous smoke lead-in process for bypass vent power generation boiler of cement kiln and device of alkaliferous smoke lead-in process

Abstract

Disclosed is an alkaliferous smoke lead-in method for a bypass vent power generation boiler of a cement kiln. An alkaliferous smoke lead-in device for the bypass vent power generation boiler of the cement kiln is adopted. The process flow includes that smoke flows to a kiln tail smoke outlet air hose from a kiln tail smoke chamber, and then sequentially flows to a bypass vent boiler air hose, a bypass vent boiler, a dust collector, an draught fan and a chimney; the device comprises the kiln tail smoke chamber, the kiln tail outlet smoke air hose, the bypass vent boiler air hose, the bypass vent boiler, the boiler dust collector and the draught fan; a kiln tail is successively communicated with the smoke chamber kiln tail outlet air hose, the bypass vent boiler air hose, the bypass vent boiler, the dust collector, the draught fan and the chimney ; and the problem of adhesion blockage of kiln ash in a smoke air hose in a bypass vent alkali discharge process of a cement decomposing kiln is resolved, and simultaneously, the problem of adhesion blockage of the boiler, pipelines and the kiln ash in the bypass vent alkali discharge process of the cement decomposing kiln is resolved.

Description

technical field [0001] The invention relates to a process and a device for introducing alkali-containing flue gas from a cement kiln bypass-vented power generation boiler, and belongs to the field of cement production and equipment. Background technique [0002] For a long time in our country and even many parts of the world, due to the high alkali content in the production of cement raw materials, the produced clinker also has too high alkali content. Therefore, reducing the alkali content in clinker is an urgent problem to be solved by many cement manufacturers at home and abroad. [0003] At present, the main measure to reduce the alkali content in clinker at home and abroad is to carry out bypass ventilation at the kiln tail of the calcining kiln: that is, in the kiln tail smoke chamber of the kiln with the most abundant alkali content, a flue gas is extracted, and the flue gas is discharged into the kiln. The kiln dust with higher alkali content is discharged, thereby ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a process for introducing alkali-containing flue gas into a cement kiln bypass power generation boiler. During the process of air discharge and alkali discharge, the problem of sticking and clogging of flue gas duct kiln dust, and at the same time solve the problem of sticking and clogging of boilers, pipes and kiln dust during the process of cement decomposition kiln bypass air discharge and alkali discharge for power generation

[0006] Another object of the present invention is to provide a device for introducing alkali-containing flue gas from a cement kiln bypass power generation boiler; this device can solve the problem of cement decomposition by using the alkali-containing flue gas introduction process of the cement kiln bypass power generation boiler of the present invention. During the kiln bypass air release and alkali discharge process, the problem of sticking and clogging of the flue gas duct kiln ash, and at the same time, solve the problem of the boiler, pipe, and kiln ash sticking and clogging during the cement decomposition kiln bypass air discharge and alkali discharge process

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