Efficient and energy-saving vertical mill grading system

Abstract

The invention discloses an efficient and energy-saving vertical mill grading system. The system is achieved by additionally setting a recirculation air device on the basis of the existing vertical mill grader, wherein the inlet of the recirculation fan is connected with a harvester fan and the outlet is connected with a valve at the air inlet of the mill through a recirculation air valve, and the air volume of the vertical mill grading system can be changed by adjusting the frequency of the recirculation fan. In comparison with the existing technical scheme, the invention solves the problems of improving yield and precision, saving energy and lowering consumption by fully utilizing the existing process system.

Description

technical field [0001] The invention relates to a vertical mill classifier, in particular to an air circulation structure of the classifier. Background technique [0002] In the production process of cement raw meal and coal mill, due to the unreasonable matching of process system parameters such as the air volume at the inlet and outlet of the separator, the air pressure and the speed of the separator, the production output, energy consumption and product accuracy are seriously affected. The air volume of the air inlet of the powder classifier directly affects the qualified particles in the mill to be introduced into the classification area of ​​the powder classifier under the action of the negative pressure system. When the system is working, if the air volume at the inlet of the powder classifier is too low, part of the material-containing gas cannot reach the classification area, resulting in unnecessary The internal circulation of the material in the mill will increase ...

AI Technical Summary

Problems solved by technology

[0003] The present invention is mainly aimed at the fact that in the current cement raw material and coal grinding process systems, the qualified particles ground out by the mill cannot be efficiently sent to the powder selection machine, and the powder selection machine cannot efficiently sort out the qualified particles, resulting in low output. , high energy consumption and low precision, through the improvement of its structure, a high-efficiency and energy-saving vertical mill classification system is provided to achieve the purpose of improving output and precision and reducing energy consumption

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