Anti-jump milling operation method of coal mill lubricating station double-pump operation

An operation method and a thin oil station technology, applied in mechanical equipment, grain processing, fluid pressure actuation devices, etc., can solve the problems of non-disappearing DCS feedback of jumping pumps, pressure chains, unreliable electrical protection, etc., to improve safe operation coefficient, stable and reliable operation

Inactive Publication Date: 2016-02-03
DATANG QITAIHE POWER GENERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The coal mill thin oil station is an important auxiliary equipment of the coal mill. After more than ten years of operation, there have been aging phenomena to varying degrees. Although it has been maintained for many years, there are still pressure chains, jumping pump DCS feedback does not disappear, electrical Unreliable protection and many other problems

Method used

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  • Anti-jump milling operation method of coal mill lubricating station double-pump operation
  • Anti-jump milling operation method of coal mill lubricating station double-pump operation

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Experimental program
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Embodiment Construction

[0020] refer to figure 1 As shown, the operation method of double-pump operation of coal mill thin oil station to prevent skipping grinding includes the following steps:

[0021] 1) DCS gas station start command 1;

[0022] 2) The oil pump in the control cabinet selects the first oil pump to work, and the second oil pump is standby 2;

[0023] 3) The first oil pump contactor excitation 3, DCS oil pump operation feedback 4;

[0024] 4) The first oil pump runs 5;

[0025] 5) The oil pressure of the system is abnormal 6;

[0026] 6) The second oil pump of the hydraulic joint starts to run 7;

[0027] 7) DCS double pump operation alarm 8, switch the forced start switch 9;

[0028] 8) Eliminate the fault 11, the system oil pressure is normal 10, and the forced switch is released 12;

[0029] 9) The system is running normally13.

[0030] In the step 2) the control cabinet can also control the second oil pump to work, and the first oil pump is in standby 14 .

[0031] refer t...

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Abstract

The invention discloses an anti-jump milling operation method of coal mill lubricating station double-pump operation. The method comprises the steps that an air switch auxiliary contact, a thermal overload relay and an oil pressure contact are additionally arranged, combined starting of a stand-by pump is achieved, and a coal mill safe operation coefficient is increased. A forcibly opening switch is additionally arranged on an operation manipulation platform, if other problems occur in an operated oil station, an operator can enable oil station double-pump operation to be achieved by switching the forcibly opening switch, the operation is switched to a normal operation mode after a maintainer clears the failure, and it is guaranteed that stability and reliability of the coal mill operation are achieved.

Description

technical field [0001] The invention relates to an operation method for preventing grinding skipping during operation of double pumps in a thin oil station of a coal mill. Background technique [0002] Coal mill thin oil station is an important auxiliary equipment of coal mill. After more than ten years of operation, it has experienced aging phenomena to varying degrees. Although it has been maintained for many years, there are still pressure chains, jumping pump DCS feedback does not disappear, electrical Unreliable protection and many other problems. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an operation method for anti-skip grinding with double-pump operation in thin oil station of coal mill with accurate circuit action and high safety factor. [0004] In order to solve the problems referred to above, the technology and method adopted in the present invention are as follows: [0005] The operation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/02F15B20/00B02C25/00B02C23/04
Inventor 冯泰峰庞绍斌耿云杰
Owner DATANG QITAIHE POWER GENERATION
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