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An explosion-proof detection system for a coal mill

An explosion-proof detection and coal mill technology, applied in measuring devices, grain processing, instruments, etc., can solve problems such as inaccurate detection of CO content, and achieve the effect of protecting safe and reliable operation

Active Publication Date: 2018-04-20
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of inaccurate detection of CO content caused by coal powder accumulation detection probes in the detection of CO content in coal mills in the prior art, the present invention provides an explosion-proof detection system for coal mills
It can prevent the problem of inaccurate probe detection caused by the accumulation of coal powder, more accurately detect the CO content in the coal mill, and prevent the spontaneous combustion and explosion of the coal mill

Method used

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  • An explosion-proof detection system for a coal mill
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  • An explosion-proof detection system for a coal mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] combine figure 1 , 2 , 3, 4 and 5, a coal mill explosion-proof detection system of the present embodiment includes an inlet hot air pipe 4 located on the coal mill, a pulverized coal outlet pipe 1 and a raw coal inlet 2, and also includes an inert gas pipe 8, hot air Temperature sensor 62, sampling pipe 5 and raw coal inlet pressure sensor 11, hot air temperature sensor 62 is arranged on inlet hot air pipe 4, inert gas pipe 8 communicates with inlet hot air pipe 4, and sampling pipe 5 is arranged on pulverized coal outlet pipe 1 The raw coal inlet 2 is provided with a raw coal inlet pressure sensor 11, the hot air temperature sensor 62, the sampling pipe 5 and the raw coal inlet pressure sensor 11 are all connected to the control center.

[0052] The hot air temperature sensor 62 detects the temperature on the inlet hot air pipe 4, the inert gas pipe 8 is used to adjust the internal pressure of the coal mill and adjust the CO content, the sampling pipe 5 on the pulveri...

Embodiment 2

[0055] An explosion-proof detection system for a coal mill in this embodiment is further improved on the basis of Embodiment 1. The coal mill also includes a coal mill system 10 and a coal mill main body 3, and the coal mill system 10 is located in the coal mill main body 3 , the raw coal inlet 2 is located above the coal mill main body 3, and communicates with the coal grinding system 10 through the raw coal inlet pipe 21. The pressure sampling pipe 22 passes through the side wall of the raw coal inlet pipe 21 and enters the raw coal inlet pipe 21. The pressure sampling pipe 22 A raw coal inlet pressure sensor 11 is installed on one end of the raw coal inlet pipe 21, and a pressure temperature sensor 51 is installed on one end of the pulverized coal outlet pipe 1. To prevent coal dust leakage, the coal mill adopts a negative pressure system , the pressure sensors are respectively arranged at the entrance and exit of the coal mill, and the obtained effects are as follows:

[0...

Embodiment 3

[0060] A coal mill explosion-proof detection system of this embodiment is further improved on the basis of Embodiment 1 or 2. The entrance of the inlet hot air pipe 4 is provided with a three-way joint, and the three-way joint includes a three-way port 71, a three-way Port two 72 and three-way port three 73 , three-way port one 71 communicates with the inlet hot air pipe 4 , three-way port two 72 communicates with the air preheater 6 , and three-way port three 73 communicates with the inert gas pipeline 8 .

[0061] The sampling pipe 5 passes through the side wall of the pulverized coal outlet pipeline 1 and penetrates into the pulverized coal outlet pipeline 1. The end of the sampling pipe 5 located in the pulverized coal outlet pipeline 1 is provided with a pressure temperature sensor 51. The pressure temperature sensor 51 communicates with the control center. connect.

[0062] The pressure and temperature sensor 51 collects the temperature and pressure in the pulverized coa...

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Abstract

The invention discloses an anti-explosion detection system and method of a coal mill, and belongs to the technical field of coal mills. The anti-explosion detection system comprises an inlet hot air pipe, a coal dust outlet pipeline and a raw coal inlet which are all located on the coal mill. The anti-explosion detection system further comprises an inert gas pipeline, a hot air temperature sensor, a sampling pipe and a raw coal inlet pressure sensor; the inlet hot air pipe is provided with the hot air temperature sensor; the inert gas pipeline communicates with the inlet hot air pipe; the coal dust output pipeline is provided with the sampling pipe; the raw coal inlet is provided with the raw coal inlet pressure sensor; and the hot air temperature sensor, the sampling pipe and the raw coal inlet pressure sensor are all connected with a control center. Aiming at the problem that in CO content detection of a coal mill in the prior art, the CO content detection is inaccurate due to the fact that coal dust is stacked on a detection probe, through the anti-explosion detection system and method of the coal mill, the problem that the CO content detection is inaccurate due to stacking of the coal dust can be solved, the content of CO in the coal mill can be detected more accurately, and spontaneous combustion and explosion of the coal mill are prevented.

Description

technical field [0001] The invention relates to the technical field of coal mills, in particular to an explosion-proof detection system for coal mills. Background technique [0002] The coal grinding process is the process in which coal is broken and its surface area is continuously increased. Coal is ground into pulverized coal in a coal mill, mainly through crushing, crushing and grinding. In order to improve the combustion efficiency of pulverized coal, it is always hoped that the pulverized coal will be ground finer. The finer the pulverized coal, the larger the surface area in contact with the air, and the more intensified the oxidation reaction with oxygen in the air, which will cause the accumulation in the container As the temperature of the pulverized coal increases, the spontaneous combustion of the pulverized coal is more likely to cause an explosion. The coal mill is prone to spontaneous combustion and explosion during the working process, mainly due to the oxi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/04G01D21/02
CPCB02C23/04G01D21/02
Inventor 冯旭刚梁聚齐章家岩
Owner ANHUI UNIVERSITY OF TECHNOLOGY