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Coal grinding device for thermal power plant

A thermal power plant and coal grinding technology, which is applied in the direction of drying gas arrangement, filter screen, grid, etc., can solve the problems of reducing the efficiency of grinding media, and achieve the effects of improving the efficiency of grinding media, saving time and manpower, and facilitating material loading

Inactive Publication Date: 2019-11-22
XIAN XINGYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent No. 201620888290.2 discloses a coal mill for thermal power plants. Although the coal with larger particles can be filtered through the filter, it is convenient to take out and grind the coal again, which greatly improves the efficiency of coal grinding, but it still requires manual labor. Take out the coal mines with larger particles on the filter screen, and stop the operation of the coal mill for safety when taking out the coal mines with larger particles on the filter screen, thus reducing the efficiency of the grinding media

Method used

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  • Coal grinding device for thermal power plant
  • Coal grinding device for thermal power plant
  • Coal grinding device for thermal power plant

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Experimental program
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Effect test

Embodiment 1

[0029] see Figure 1-3 A kind of coal grinding device for thermal power plants according to an embodiment of the present invention, comprising a workbench 1, a crushing device, a conveying device, an automatic screening air-drying device and a PLC controller 2, and four support columns 22 are fixedly arranged under the workbench 1, The upper surface of the workbench 1 is set as a plane, which is used to carry the crushing device, the conveying device, the automatic screening air-drying device and the PLC controller 2. The crushing device and the PLC controller 2 are arranged on one end of the workbench 1, and the conveying device is arranged under the crushing device. The conveying device is equipped with an automatic screening air-drying device at the end far away from the crushing device.

[0030] Let's talk about the specific settings and effects of its pulverizing device, conveying device, automatic screening air-drying device and PLC controller 2 below.

[0031] The crus...

Embodiment 2

[0036] see Figure 1-3 , for the conveyor belt 8, a baffle 19 is provided on the top and both sides of the conveyor belt 8, one end of the baffle 19 is fixedly connected with the outer wall of the crushing chamber 3, and the other end of the baffle 19 is fixedly connected with the outer wall of the air-drying cylinder 9, which can effectively prevent external The wind blows the pulverized coal on the conveyor belt 8 away; for the support column 22, rubber pads 20 are fixed under the support column 22, which can play the role of shock absorption and anti-skid; A hopper 21 is fixed on the feed port 7, which can increase the diameter of the feed port 7 and facilitate feeding; for the air preheater 11, the air preheater 11 is installed in the smoke exhaust passage of the boiler, and can utilize the exhaust The high-temperature flue gas in the flue channel preheats the air, thereby increasing the effect of drying the pulverized coal.

[0037] In summary, with the help of the above...

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Abstract

The invention discloses a coal grinding device for a thermal power plant. The coal grinding device for the thermal power plant comprises a workbench, a crushing device, a conveying device, an automatic screening and drying device and a PLC, wherein four supporting columns are fixedly arranged below the workbench, the crushing device and a PLC are arranged at one end of the workbench, the conveyingdevice is arranged at the lower part of the crushing device, and the automatic screening and drying device is arranged at the end, far away from the crushing device, of the conveying device; and thecrushing device comprises a crushing chamber, the crushing chamber is fixedly arranged on the workbench, and a first motor is fixedly arranged on the crushing chamber. The coal grinding device has thebeneficial effects that coal can be crushed, filtered and dried, the large-particle filtered residues in a filter cylinder can be automatically conveyed into a filter residue recovery box to be conveniently recycled and reground, shutdown is not needed for cleaning, the time and labor of cleaning waste are saved, and the efficiency of the coal grinding is further improved.

Description

technical field [0001] The invention relates to the field of thermal power plant equipment, in particular to a coal grinding device for a thermal power plant. Background technique [0002] The coal mill is the main equipment of the pulverized coal preparation system of the thermal power station. The function of the steel ball coal mill is to dry the coal, crush the coal through the steel ball and the liner in the cylinder of the steel ball mill, and grind it into coal powder to supply the boiler for combustion. In the coal-fired power plant boiler, for To improve the combustion rate and ignition performance of pulverized coal, coal pulverizers are widely used to grind raw coal into pulverized coal and send it into the furnace for combustion through pipelines. In the process of sending the raw coal into the furnace after being ground by the coal mill, there are two ways: 1. The direct blowing pulverizing system, that is, the coal is directly sent to the furnace for combustio...

Claims

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Application Information

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IPC IPC(8): B02C13/06B02C13/30B02C13/284B02C13/26B02C13/286B02C25/00B02C23/10B02C23/20B07B1/24B07B1/42F16F15/02F26B21/00
CPCB02C13/06B02C13/26B02C13/284B02C13/286B02C13/30B02C23/10B02C23/20B02C25/00B02C2013/28618B07B1/24B07B1/42F16F15/02F26B21/002F26B21/004
Inventor 许海
Owner XIAN XINGYI TECH