CN103883504A - DSC double pump hot standby control method for air separation unit liquid oxygen pump - Google Patents
DSC double pump hot standby control method for air separation unit liquid oxygen pump Download PDFInfo
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- CN103883504A CN103883504A CN201410084567.1A CN201410084567A CN103883504A CN 103883504 A CN103883504 A CN 103883504A CN 201410084567 A CN201410084567 A CN 201410084567A CN 103883504 A CN103883504 A CN 103883504A
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- liquid oxygen
- hot standby
- oxygen pump
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Abstract
The invention provides a DSC double pump hot standby control method for an air separation unit liquid oxygen pump. According to the method, it is guaranteed that a main pump and a standby pump are used at the same time, the standby pump operates at low speed, when the main pump stops because of failure, the standby pump rapidly copies all parameters of the main pump and is started to be adjusted to be in a working state of the main pump, so that the starting time of the standby pump is saved, it is guaranteed that the liquid oxygen pressure and flow can not generate high fluctuations, and production continuity of the process and follow-up processor is not affected, and economic losses caused by accidental stopping of the main pump are reduced.
Description
Technical field
The present invention relates to the hot standby controlling method of a kind of air separation facility liquid oxygen pump DCS double pump.
Background technique
Existing liquid oxygen pump, in order to reduce consumption, all adopts cold standby state at ordinary times substantially, and pump is jumped after car, liquor charging again after standby pump pressurization need to being started.But it puts into operation from cold standby to startup, the time approximately needs more than 10 minute, so once main pump fault stops, owing to starting, the standby pump time is long, gasification oxygen supply pressure keeps incessantly, must enter complete vehicle stop state, can cause rear operation to stop, again purge again after waiting oxygen supply pressure to reach requirement, continue again to feed intake, drive, thereby indirect loss is huge.
Summary of the invention
For solving the problems of the technologies described above, the invention provides the hot standby controlling method of a kind of air separation facility liquid oxygen pump DCS double pump.
Technical solution of the present invention is:
The hot standby controlling method of a kind of air separation facility liquid oxygen pump DSC double pump, is main pump and the stand by pump that utilizes DSC control system control liquid oxygen pump, switches to realize the hot standby high speed of liquid oxygen pump, it is characterized in that:
(1) liquid oxygen pump of DSC control system control possesses alternative condition, in system start-up or production process adjusting stage, is switched to hot standby state, enters steady production status and can switch to cold standby state;
(2) liquid oxygen pump is in the time of hot standby state, and main pump runs up, outwards liquor charging, and stand by pump low-speed running, micro-the opening of reflux valve returned stream.
The invention has the beneficial effects as follows:
The hot standby control system of air separation facility liquid oxygen pump double pump of the present invention has ensured that main pump and standby pump use simultaneously, standby pump is with low-speed running, after main pump stops because of fault, stand by pump copies rapidly all parameters of main pump and starts the working state of adjusting to main pump, thereby save the starting time of standby pump, and ensure that thereby liquid oxygen pressure and flow etc. can not produce large fluctuation and affect the production persistency of this operation and rear operation, reduce because main pump surprisingly stops the economic loss causing.
Brief description of the drawings
Fig. 1 is DSC system control program figure of the present invention.
Embodiment
As shown in Figure 1, the hot standby controlling method of a kind of air separation facility liquid oxygen pump DSC double pump of the present invention, is main pump and the stand by pump that utilizes DSC control system control liquid oxygen pump, switches to realize the hot standby high speed of liquid oxygen pump, it is characterized in that:
(1) liquid oxygen pump of DSC control system control possesses alternative condition, in system start-up or production process adjusting stage, is switched to hot standby state, enters steady production status and can switch to cold standby state;
(2) liquid oxygen pump is in the time of hot standby state, and main pump runs up, outwards liquor charging, and stand by pump low-speed running, micro-the opening of reflux valve returned stream.
Claims (1)
1. the hot standby controlling method of air separation facility liquid oxygen pump DSC double pump, is main pump and the stand by pump that utilizes DSC control system control liquid oxygen pump, switches to realize the hot standby high speed of liquid oxygen pump, it is characterized in that:
(1) liquid oxygen pump of DSC control system control possesses alternative condition, in system start-up or production process adjusting stage, is switched to hot standby state, enters steady production status and can switch to cold standby state;
(2) liquid oxygen pump is in the time of hot standby state, and main pump runs up, outwards liquor charging, and stand by pump low-speed running, micro-the opening of reflux valve returned stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084567.1A CN103883504A (en) | 2014-03-07 | 2014-03-07 | DSC double pump hot standby control method for air separation unit liquid oxygen pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410084567.1A CN103883504A (en) | 2014-03-07 | 2014-03-07 | DSC double pump hot standby control method for air separation unit liquid oxygen pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103883504A true CN103883504A (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410084567.1A Pending CN103883504A (en) | 2014-03-07 | 2014-03-07 | DSC double pump hot standby control method for air separation unit liquid oxygen pump |
Country Status (1)
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| CN (1) | CN103883504A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529417A (en) * | 2019-08-15 | 2019-12-03 | 西安陕鼓动力股份有限公司 | A kind of automatic on-line of multi-machine parallel connection Systems of Centrifugal Compressor Unit cuts machine operating method |
| CN112228328A (en) * | 2020-10-20 | 2021-01-15 | 中煤科工集团重庆研究院有限公司 | Hot standby switching method for double extraction pumps |
| CN112343807A (en) * | 2019-08-08 | 2021-02-09 | 内蒙古伊泰煤制油有限责任公司 | Automatic control method and device for liquid oxygen pump |
| CN113719457A (en) * | 2021-11-03 | 2021-11-30 | 华能（天津）煤气化发电有限公司 | Method for quickly switching multistage centrifugal cryogenic liquid pump of air separation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5879641A (en) * | 1981-11-07 | 1983-05-13 | Denyo Kk | Parallel running method and device of engine compressor |
| US4527953A (en) * | 1984-10-12 | 1985-07-09 | E. I. Du Pont De Nemours And Company | Pump unit for sampling air |
| CN202230380U (en) * | 2011-10-17 | 2012-05-23 | 重庆明宝科技发展有限公司 | Industrial online redundancy control system |
-
2014
- 2014-03-07 CN CN201410084567.1A patent/CN103883504A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5879641A (en) * | 1981-11-07 | 1983-05-13 | Denyo Kk | Parallel running method and device of engine compressor |
| US4527953A (en) * | 1984-10-12 | 1985-07-09 | E. I. Du Pont De Nemours And Company | Pump unit for sampling air |
| CN202230380U (en) * | 2011-10-17 | 2012-05-23 | 重庆明宝科技发展有限公司 | Industrial online redundancy control system |
Non-Patent Citations (3)
| Title |
|---|
| 丁丽君 等: "大型内压缩空分设备双泵流程中的两台低温液体泵的自动切换控制", 《气体分离》, 31 October 2010 (2010-10-31), pages 32 - 35 * |
| 吴岳棉 等: "PLC在重油脱盐系统中的应用", 《测控技术》, vol. 22, no. 8, 31 August 2003 (2003-08-31), pages 32 - 34 * |
| 张飞明: "空分设备用低温液体泵正常工作需注意的问题和措施", 《化学工程与装备》, no. 5, 31 May 2013 (2013-05-31), pages 136 - 138 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343807A (en) * | 2019-08-08 | 2021-02-09 | 内蒙古伊泰煤制油有限责任公司 | Automatic control method and device for liquid oxygen pump |
| CN110529417A (en) * | 2019-08-15 | 2019-12-03 | 西安陕鼓动力股份有限公司 | A kind of automatic on-line of multi-machine parallel connection Systems of Centrifugal Compressor Unit cuts machine operating method |
| CN112228328A (en) * | 2020-10-20 | 2021-01-15 | 中煤科工集团重庆研究院有限公司 | Hot standby switching method for double extraction pumps |
| CN113719457A (en) * | 2021-11-03 | 2021-11-30 | 华能（天津）煤气化发电有限公司 | Method for quickly switching multistage centrifugal cryogenic liquid pump of air separation device |
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Application publication date: 20140625 |
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| RJ01 | Rejection of invention patent application after publication |