Coal mill grinding hot air pipe and power generation hot air pipe parallel device

Abstract

The invention provides a coal mill grinding hot air pipe and power generation hot air pipe parallel device with simple structure and novel design; the device comprises a grate cooler; the features are that the grate cooler is respectively connected with a cyclone separator A and a cyclone separator B through a hot air pipe A and a hot air pipe B; the cyclone separator B is connected with a coal mill through the hot air pipe B; the cyclone separator A is connected with a kiln head through the hot air pipe A; the kiln head is connected with a kiln head waste gas blower through the hot air pipe A; the coal mill is connected with a coal mill powder concentrator through the hot air pipe A; a dust collector is respectively connected with the coal mill powder concentrator and a coal mill system blower through the hot air pipe A; ventilation areas of a power generation system hot air pipe and a whirlwind dust collector are enlarged, air speed is reduced, and dust amount can be reduced. Wearing of the whirlwind dust collector is obviously alleviated with safety and reliability, thus reducing exhaust fan power consumption, increasing generating capacity, improving coal mill output, prolonging whirlwind dust collector and hot air pipe usage period, and reducing coal mill system blast changes.

Description

technical field [0001] The invention relates to the technical field of coal milling machinery, in particular to a parallel device for coal milling hot air ducts and power generation hot air ducts. Background technique [0002] When the coal grinding system and the waste heat power generation AQC boiler are on the same side of the grate cooler of the cement rotary kiln, in order to facilitate the process layout, the coal grinding hot air and the power generation hot air generally use the same pipe and the same set of cyclone dust collectors. The result of this arrangement is: if the exhaust fan of the waste heat power generation AQC boiler is too small, the kiln head will generate positive pressure, which will affect the power generation and the clinker cooling effect; if the exhaust fan of the AQC boiler is increased, the coal The negative pressure of the grinding head will increase correspondingly, making it difficult for the exhaust fan of the coal mill system to draw air....

AI Technical Summary

Problems solved by technology

[0003] One is to increase power consumption

[0004] The second is that the wind speed in the pipeline is accelerated, so the concentration of clinker dust is increased, and the hot air pipeline and cyclone dust collector are seriously worn

[0005] The third is that the negative pressure of the grinding head and tail of the coal mill becomes larger

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