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Medium-speed coal mill isobaric air chamber

A coal mill and air chamber technology, which is applied in the direction of combustion method, block/powder fuel preparation, grain processing, etc., can solve problems such as failure to operate normally, and achieve the effect of ensuring consistency, ensuring air volume, and improving uniformity

Inactive Publication Date: 2017-03-08
SHANDONG ZHONGSHI YITONG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Partial burning of the boiler will bring a series of obstacles to the operation, and in severe cases, it may even fail to operate normally

Method used

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  • Medium-speed coal mill isobaric air chamber
  • Medium-speed coal mill isobaric air chamber
  • Medium-speed coal mill isobaric air chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The utility model is described in detail below in conjunction with accompanying drawing:

[0020] The pressurized air chamber of the medium-speed coal mill includes a casing 1 and a transmission shaft 5 located on its center line. The casing 1 is provided with an air inlet 4, and one end of the casing is provided with a grinding disc 6, and a nozzle is provided on the grinding disc. 2. An arc-shaped flow equalizer 3 is installed on the inner side of the outer wall of the casing 1, and the thickness of the arc-shaped flow equalizer 3 changes along the circumferential direction of the outer wall of the casing 1;

[0021] The thickness of the arc-shaped flow equalizer 3 is smaller as it is closer to the air inlet of the air chamber cabinet in the circumferential direction.

[0022] The arc-shaped flow equalizer 3 is a cone in the axial direction close to the grinding disc, and the closer to the grinding disc, the thickness becomes smaller; the position away from the grindi...

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PUM

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Abstract

The invention discloses an isobaric air chamber of a medium speed mill. The isobaric air chamber comprises an arc-shaped flow equalizing part mounted on the inner side of an outer side wall of the air chamber, wherein the thickness of the flow equalizing part is changed in the circumference direction of the outer side wall of the air chamber; the closer the arc-shaped flow equalizing part is to the position of an air inlet of the shell of the air chamber in the circumference direction, the smaller the thickness is. The arc-shaped flow equalizing part is a cone in the position close to a abrasive disk in the axis direction, and the closer the arc-shaped flow equalizing part is to the abrasive disk, the smaller the thickness is; the arc-shaped flow equalizing part is a column in the position away from the abrasive disk. The isobaric design inside the air chamber is achieved mainly because the arc-shaped flow equalizing part is welded on the inner side of the outer side wall of the air chamber and the width (or thickness) of the flow equalizing part is changed along the circumference.

Description

technical field [0001] The invention relates to an air chamber of a medium-speed coal pulverizer, in particular to an isobaric air chamber of a medium-speed coal pulverizer. Background technique [0002] The uniformity of pulverized coal entering the furnace from each burner directly affects the combustion status of the boiler. After the primary air of the pulverizing system is mixed thoroughly in the cold state, the uniformity of the air volume and powder volume of each pulverized coal pipeline in the hot state cannot be guaranteed. After feeding coal, due to a certain gradient of pulverized coal concentration at the outlet of the pulverizer, the air volume and powder volume entering the primary air pulverized pipes of each burner have a large deviation, and the phenomenon of "partial burning" appears in the furnace. The partial burning of the boiler will bring a series of obstacles to the operation, and even fail to operate normally in severe cases. One of the main reaso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/18F23K1/00
CPCB02C23/26
Inventor 王传帅吴晓武车刚
Owner SHANDONG ZHONGSHI YITONG GRP