CN101787971B - Method for monitoring online running state of water-ring vacuum pump - Google Patents
Method for monitoring online running state of water-ring vacuum pump Download PDFInfo
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- CN101787971B CN101787971B CN2009102270983A CN200910227098A CN101787971B CN 101787971 B CN101787971 B CN 101787971B CN 2009102270983 A CN2009102270983 A CN 2009102270983A CN 200910227098 A CN200910227098 A CN 200910227098A CN 101787971 B CN101787971 B CN 101787971B
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- vacuum pump
- temperature
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- nash hytor
- distributed control
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Abstract
The invention discloses a method for monitoring the running state of a water-ring vacuum pump. The method comprises the following steps: (1) mounting a digital thermocouple thermometer, transmitting the temperature data measured by the digital thermocouple thermometer to a data communication system, and arranging a tertiary thermal alarm system in the data communication system; (2) calculating the corresponding saturation pressure P1 according to the temperature value received by the data communication system; and (3) subtracting P2 from P1 to get delta P (delta P = P1 - P2), and starting the tertiary thermal alarm system according to the value of delta P. The invention has the following advantages: (1) the method achieves the online data tele-transmission of the temperature of the working solution of the vacuum pump, thus reducing the investment; (2) the method is capable of directly monitoring the running state of the vacuum pump; and (3) the method can effectively prevent the water-ring vacuum pump from being damaged by cavitation and monitor the running state of a generator set in a safe and economic way, thus ensuring the good economic benefit.
Description
Technical field
The present invention relates to a kind of vacuum pump on-line operation state monitoring method, especially relate to a kind of off-centre of thermal power generation unit, the monitoring method of online running state of water-ring vacuum pump.
Background technique
At present, the eccentric Nash hytor of the many employings of the condenser vacuum system of large-scale thermal power machine group when this pump moves in the rough vacuum scope, has high efficiency to pump the advantage of air.But its characteristic receives the working solution Influence of Temperature, and available maximum vacuum depends on the pairing pressure for vaporization of working solution temperature.When pressure during near the exhaust steam pressure of unit, exhaust capacity is descended, the unit soften(ing), coal consumption raises, and load carrying capacity descends during southern summer condition, has a strong impact on the Economy and the Security of unit operation; On the other hand, also can cause the cavitation of vacuum pump impeller to be damaged.At present, to the monitoring method of Nash hytor working solution temperature, all be to use the bimetallic thermometer of on-the-spot reading formula, monitor not intuitively, the working solution temperature data error that records is bigger, thereby to the running state of vacuum pump, can't directly monitor.
Summary of the invention
The technical problem that the present invention will solve is; To the cavitation phenomenons that occurs easily in the existing technology; A kind of Nash hytor method for monitoring operation states is provided; So that can directly monitor the operation conditions of Nash hytor effectively, keep watch on safety, the economical operation of unit, prevent that the vacuum pump cavitation from causing damage.
Technical solution of the present invention is that a kind of Nash hytor method for monitoring operation states that is provided is to be following step:
One, stops the Nash hytor operation; One digital thermocouple thermometer or thermal resistance thermometer is installed on the cooler front side pipeline on the working solution circulating line of this vacuum pump; And increase by one road compensating wire is connected with distributed control system on this thermometer; Thermo-electric couple temperature data or resistance and temperature data that the said temperature meter is surveyed reach distributed control system, and three grades of thermal technology's alarm systems are set in distributed control system;
Two, the temperature value that receives according to distributed control system calculates the saturation pressure P that tries to achieve the institute's working solution temperature that passes correspondence through conventional heating power
1Value;
Three, with step 2 gained saturation pressure P
1Value deduct the exhaust steam pressure P of turbine vacuum system
2Value, difference be Δ P=P
1-P
2, start three grades of alarm systems of thermal technology according to the value of Δ P:
(1), if 0.2kPa＜Δ P≤0.5kPa; Explain that Nash hytor is about to get into the cavitation state; As under this operating mode, move for a long time; With the safety and economic operation that influences unit, start three grades of warnings of thermal technology, requirement takes the measure of additional cold working medium or cleaning heat exchanger to reduce the temperature of this vacuum pump working solution;
(2), if 0.0kPa＜Δ P≤0.2kPa, explain that Nash hytor has got into the cavitation state as under this operating mode, moving for a long time, with the safety and economic operation that has a strong impact on unit, start the warning of thermal technology's secondary, get subsequent use Nash hytor ready;
(3), if Δ P≤0.0kPa; Explain that then Nash hytor has been absorbed in the cavitation state; As under this operating mode, move for a long time, will jeopardize the safety and economic operation of unit, start thermal technology's one-level and report to the police; Stop the Nash hytor to move immediately, use step (2) to be equipped with Nash hytor immediately and change this vacuum pump and launch the appendage vacuum pump of this replacing immediately.
This method beneficial effect of the invention is: (1), change on-the-spot reading formula bimetallic thermometer into digital intuitively thermal resistance thermometer; Increasing by one road compensating wire is connected with distributed control system; Just realized the real-time online teletransmission of vacuum pump working solution temperature data, little investment; (2), through heating power calculate with data relatively, can be through three grades of thermal technologies directly operation conditions of monitoring vacuum pump of reporting to the police; (3), can prevent effectively that the Nash hytor cavitation from causing damage, and effectively monitor the safety and economic operation situation of generator set, good in economic efficiency.
Embodiment
Embodiment 1
One, stops the Nash hytor operation; One digital thermocouple thermometer is installed on the cooler front side pipeline on the working solution circulating line of this vacuum pump; The digital thermocouple thermometer of K type that this thermometer adopts the safe instrument of Chinese Shanghai armour Co., Ltd to produce; On this thermometer, increasing by one road compensating wire is connected with distributed control system; The thermo-electric couple temperature data that the said temperature meter is surveyed reaches distributed control system, and three grades of thermal technology's alarm systems are set in distributed control system;
Two, the temperature value that receives according to distributed control system calculates the saturation pressure P that tries to achieve the institute's working solution temperature that passes correspondence through conventional heating power
1Value;
Three, with step 2 gained saturation pressure P
1Value deduct the exhaust steam pressure P of turbine vacuum system
2Value, Δ P=P
1-P
2:
(1), if 0.2kPa＜Δ P≤0.5kPa, start three grades of warnings of thermal technology, require to take to replenish the temperature that cold working medium reduces this vacuum pump working solution;
(2), if 0.0kPa＜Δ P≤0.2kPa, start thermal technology's secondary and report to the police, get subsequent use Nash hytor ready;
(3), if Δ P≤0.0kPa, start thermal technology's one-level and report to the police, stop the Nash hytor to move immediately, use step (2) to be equipped with this vacuum pump of Nash hytor replacing immediately and also launch the appendage vacuum pump of this replacing immediately.
Embodiment 2
One, stops the Nash hytor operation; One digital thermal resistance thermometer is installed on the cooler front side pipeline on the working solution circulating line of this vacuum pump; The digital thermal resistance thermometer of W type that this thermometer adopts Jinhua, Chinese Jiangsu self-reacting device instrument factory to produce; On this thermometer, increasing by one road compensating wire is connected with distributed control system; The resistance and temperature data that the said temperature meter is surveyed reach distributed control system, and three grades of thermal technology's alarm systems are set in distributed control system;
Two, the temperature value that receives according to distributed control system calculates the saturation pressure P that tries to achieve the institute's working solution temperature that passes correspondence through conventional heating power
1Value;
Step 3 is with embodiment 1.
Claims (1)
1. Nash hytor method for monitoring operation states, this method is following step:
(1), stops the Nash hytor operation; One digital thermocouple thermometer or thermal resistance thermometer is installed on the cooler front side pipeline on the working solution circulating line of this vacuum pump; And increase by one road compensating wire is connected with distributed control system on this thermometer; Thermo-electric couple temperature data or resistance and temperature data that the said temperature meter is surveyed reach distributed control system, and three grades of thermal technology's alarm systems are set in distributed control system;
(2), the temperature value that receives according to distributed control system, calculate the saturation pressure P that tries to achieve the institute's working solution temperature that passes correspondence through conventional heating power
1Value;
(3), with step (two) gained saturation pressure P
1Value deduct the exhaust steam pressure P of turbine vacuum system
2Value, Δ P=P
1-P
2:
(1), if 0.2kPa＜Δ P≤0.5kPa, start three grades of warnings of thermal technology, require to take the measure that replenishes cold working medium or clean heat exchanger to reduce the temperature of this vacuum pump working solution;
(2), if 0.0kPa＜Δ P≤0.2kPa, start thermal technology's secondary and report to the police, get subsequent use Nash hytor ready;
(3), if Δ P≤0.0kPa, start thermal technology's one-level and report to the police, stop the Nash hytor to move immediately, use step (2) to be equipped with this vacuum pump of Nash hytor replacing immediately and also launch the appendage vacuum pump of this replacing immediately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102270983A CN101787971B (en) | 2009-12-04 | 2009-12-04 | Method for monitoring online running state of water-ring vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102270983A CN101787971B (en) | 2009-12-04 | 2009-12-04 | Method for monitoring online running state of water-ring vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101787971A CN101787971A (en) | 2010-07-28 |
| CN101787971B true CN101787971B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102270983A Active CN101787971B (en) | 2009-12-04 | 2009-12-04 | Method for monitoring online running state of water-ring vacuum pump |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564187B (en) * | 2013-10-21 | 2017-08-22 | 江苏卓易环保科技有限公司 | A kind of waterproof method for controlling impact of saturated vapor generating equipment |
| CN104632602B (en) * | 2013-11-08 | 2017-02-15 | 中国石油天然气集团公司 | Reciprocating water injection pump state monitoring and fault diagnosis system |
| CN104265616B (en) * | 2014-09-19 | 2016-08-17 | 国家电网公司 | Converter valve inner cold water main circulation pump running status on-line monitoring and assessment system |
| CN104633457B (en) * | 2015-02-14 | 2017-08-29 | 西安热工研究院有限公司 | A kind of thermal power station's regulating valve real-time online Cavitation detection early warning system and method |
| CN110108134B (en) * | 2019-05-28 | 2020-02-07 | 国电南京电力试验研究有限公司 | Method for evaluating influence of pumping capacity of condenser vacuum pumping equipment on vacuum value |
| CN112855515B (en) * | 2021-03-12 | 2022-01-28 | 深圳市鑫路远电子设备有限公司 | Vacuum pump safety monitoring method and device |
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| CN101787971A (en) | 2010-07-28 |
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Owner name: SCIENTIFIC RESEARCH INSTITUTE OF HU NAN ELECTRIC P Free format text: FORMER NAME: HUNAN INSTITUTE OF POWER COMPANY EXPERIMENT |
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| CP01 | Change in the name or title of a patent holder |
Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Co-patentee after: Hunan Province Xiangdian Test & Research Institute Co., Ltd. Patentee after: Science Research Institute of Hunan Electric Power Co., Ltd. Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Co-patentee before: Hunan Province Xiangdian Test & Research Institute Co., Ltd. Patentee before: Hunan Institute of Power Company Experiment |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100728 Assignee: Hunan Xiangdian Test Technology Co. Ltd. Assignor: The scientific research institute|Hunan province electric power company of Hunan Province Hunan Research Institute Co Ltd Contract record no.: 2012430000189 Denomination of invention: Method for monitoring online running state of water-ring vacuum pump Granted publication date: 20120104 License type: Exclusive License Record date: 20120817 |