Cyclone preheater for cement pre-decomposition kiln

Abstract

The invention discloses a cyclone preheater for a cement pre-decomposition kiln. The cyclone preheater comprises a cyclone cylinder, an ascending pipeline tangentially connected to the upper portion of the cyclone cylinder, an airflow outlet formed in the upper end of the cyclone cylinder, a discharge port formed in the lower end of the cyclone cylinder, a discharge pipe connected to the ascendingpipeline and a guide impeller. The guide impeller comprises an impeller shaft and a plurality of scraping pieces arranged outside the impeller shaft in a surrounding manner, the port, connected intothe ascending pipeline, of the discharge pipe is arranged to be a flat opening, the impeller shaft extends in the transverse direction and is rotationally installed in the flat opening, and the outercontours of the scraping pieces are tangent to the upper side wall and the lower side wall of the flat opening correspondingly. The problems of poor dispersion and a poor heat exchange effect of preheated raw material powder entering the ascending pipeline due to discontinuous and non-uniform discharging of the preheated raw material powder are solved.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to a cyclone preheater for a cement precalcining kiln. Background technique [0002] During the cement production process, the raw material needs to enter the preheater system before entering the kiln. The purpose is to exchange heat with the hot flue gas from the rotary kiln and calciner, absorb a large amount of heat energy contained in the flue gas, and improve the raw material entering the kiln. decomposition rate. [0003] The preheater system includes a multi-stage cyclone preheater. The cyclone preheater makes full use of the hot gas discharged from the rotary kiln and calciner, and realizes preheating and partial heating through the heat exchange between gas and solid and the separation of the cyclone. Breakdown function. Raw meal powder is fed from the ascending pipeline of the second-stage cyclone, exchanges heat with the hot gas from the second stage, and ente...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a cyclone preheater for cement precalcining kiln to solve the discontinuous and uneven feeding of preheated raw meal powder, resulting in the dispersion of preheated raw meal powder entering the ascending pipeline. Poor, poor heat transfer effect

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