Compound pulverizing system based on coal pulverizer

A technology of a pulverizing system and a coal mill, which is used in solid separation, separation of solids from solids by air flow, grain processing, etc. Increase ventilation and other issues to achieve the effect of improving stability and combustion efficiency, improving reliability and flexibility, and stabilizing ignition and combustion
CN102189024BInactive Publication Date: 2013-03-06ZHUZHOU HUAYIN THERMAL POWER GENERATION +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHUZHOU HUAYIN THERMAL POWER GENERATION
Publication Date
2013-03-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

A compound pulverizing system based on a coal pulverizer comprises a fine powder separator, a coal dust warehouse, a coal dust feeder, a coal dust mixer, a mill fan, a coal pulverizer, a coal feeder, a crude powder separator and a primary air supply mechanism, wherein the coal feeder is connected with an inlet port of the coal pulverizer; an outlet port of the coal pulverizer is connected with the inlet port of the crude powder separator; an outlet port of the crude powder separator is divided into two routes with one route leading to the fine powder separator through a powder pipe of the coal dust warehouse and transfer valves and the other route leading to primary air pipelines through transfer valves; an exhaust gas outlet port of the fine powder separator is connected with the primary air pipelines through an exhaust pipe, the mill fan and transfer valves; a powder outlet port of the fine powder separator is connected with an inlet port of the coal dust warehouse; and an outlet port of the coal dust warehouse is connected with the primary air pipelines through powder supply pipes, the coal dust feeder and the coal dust mixer. The compound pulverizing system based on a coal pulverizer in the invention has advantages of simple and compact structure, low cost, low energy consumption and good pulverizing effect, and can be widely applied.
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Description

technical field

[0001] The invention mainly relates to the field of coal powder preparation system in coal-fired thermal power plants, in particular to a composite pulverizing equipment. Background technique

[0002] The following contradictions have always existed in the design and operation of the direct blowing pulverization system based on various steel ball coal mills (single-inlet-single-outlet and double-inlet-double-outlet type): If the output of the steel ball coal mill is too large, then The power consumption of the pulverizing unit will always be high during operation, and the economy will be worse under low load conditions; if the output of the ball mill is too small, the calorific value, moisture, ash, Due to factors such as changes in the property coefficient and the particle size of raw coal, the pulverized coal becomes coarser during operation, the pulverizing output is insufficient, the combustion stability and efficiency of the boiler decrease, and the boil...

Claims

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