CN106289665A - A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online - Google Patents
A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online Download PDFInfo
- Publication number
- CN106289665A CN106289665A CN201610708365.9A CN201610708365A CN106289665A CN 106289665 A CN106289665 A CN 106289665A CN 201610708365 A CN201610708365 A CN 201610708365A CN 106289665 A CN106289665 A CN 106289665A
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- China
- Prior art keywords
- hydrogen
- leakage point
- electromotor
- generator group
- cooled generator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Abstract
The invention discloses a kind of method utilizing tracer to search hydrogen cooled generator group leakage point online, under it is characterized in that step enters: be filled with nitric oxide gas in electromotor by the hydrogen make pipeline of electromotor, after nitric oxide gas is mixed homogeneously with the hydrogen in hydrogen cooling system, the position detecting brownish red gas of emerging is leakage point.The present invention has the advantage that the hydrogen cooled generator group that the present invention is directed to on-line operation compared to existing technology; can quickly indicate the accurate location of leakage point; facilitate staff accurately, quickly position, be greatly improved accuracy and work efficiency, may insure that the normal safe of unit runs simultaneously.The method even can replace the most conventional leakage lookup method completely.
Description
Technical field
The present invention relates to generating set gas leak detection technology field, in particular one utilizes tracer online
The method searching hydrogen cooled generator group leakage point.
Background technology
The electromotor type of cooling of the heavy-duty generator group in the whole world mainly has air cooling at present, hydrogen-cooled, liquid is cold and evaporates cold
The most several forms, wherein, the most domestic large-scale thermal power machine group newly-increased in recent years, it is essentially all the hydrogen-cooled side of employing
Formula, hydrogen-cooled unit has volume little, and consumptive material is few, and heat exchange efficiency is high, the advantages such as little is lost, thus is widely used.At electromotor
In structure, it is to utilize lubricating oil system to seal hydrogen, uses special smoke exhaust fan to feel oil smoke and molten from emptying simultaneously
Solution hydrogen wherein is arranged to air.
Due to in-site installation construction or the reason such as sealing member is aging, often there is certain hydrogen and let out in hydrogen cooled generator group
Leakage quantity.According to current GB 4962-2008 " hydrogen use act of technique for security " and DL/T 607-1996, " steam turbine generator leaks
Water, leakage hydrogen inspection " in relevant regulations, the hydrogen gas leakage amount of electromotor have to comply with relevant criterion (generally leakage rate≤
12m3/ d), the safe and stable operation of guarantee unit, otherwise must shut down process.
Due to the explosion hazard of hydrogen, most conventional look for leakage method inapplicable.The most conventional leakage method of looking for is profit
Leakage point is searched for instruments such as density of hydrogen alarm or ultrasonic leak detectors.
1, utilize density of hydrogen alarm to search for leakage point.The advantage of the method is can to enter under non-stop-machine state
The online searching work of row leak source, but due to character such as hydrogen density are low, quality is little, its in atmosphere evaporation rate be exceedingly fast,
If distance leakage point distance is slightly remote (generally higher than more than 10cm), or has the interference such as air-flow, density of hydrogen instrument around leak source
Cannot accurately judge leakage point, even cannot measure the significant change of density of hydrogen.
2, utilizing the equipment such as ultrasonic leak detector to search leakage point, this method is to utilize the air current flow sound at leakage point
The difference of sound searches leak source.Its advantage is that degree of accuracy is high, can be accurately positioned leakage point, and shortcoming is owing to site environment is multiple
Miscellaneous, instrument is easy to maybe cannot to be scanned by external interference the region that part is blocked, simultaneously because must accurate scanning to letting out
Leak source instrument just can have testing result, tends to ignore some regions.
Both the above method is the domestic common online method searching hydrogen cooled generator group hydrogen leak point.But exist
Significantly shortcoming, actually used middle effect is undesirable.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one utilizes tracer to search hydrogen-cooled online
The method of group of motors leakage point.
The present invention is achieved by the following technical solutions: one utilizes tracer to search the leakage of hydrogen cooled generator group online
The method of point, it is characterised in that under step enters: be filled with nitric oxide gas in electromotor by the hydrogen make pipeline of electromotor
Body, after nitric oxide gas is mixed homogeneously with the hydrogen in hydrogen cooling system, detects the position of brownish red gas of emerging i.e.
For leakage point.
As further improvement of these options, it is supplemented in the nitric oxide gas of electromotor by hydrogen make pipeline
Volume and electromotor hydrogen cooling system in the volume ratio of hydrogen less than 0.02.
As further improvement of these options, the position detecting brownish red gas of emerging is to be observed by manual site
Detection, testing staff should use positive-pressure type respiratory organ to carry out security protection.
The present invention has the advantage that the hydrogen cooled generator group that the present invention is directed to on-line operation compared to existing technology, permissible
Quickly indicate the accurate location of leakage point, facilitate staff accurately, quickly position, be greatly improved accuracy and work effect
Rate, may insure that the normal safe of unit runs simultaneously.The method even can replace the most conventional leakage lookup side completely
Method.
Detailed description of the invention
Elaborating embodiments of the invention below, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following enforcement
Example.
A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online, it is characterised in that under step enters: logical
The hydrogen make pipeline crossing electromotor is filled with nitric oxide gas in electromotor, treats nitric oxide gas and hydrogen cooling system
After interior hydrogen mix homogeneously, the position detecting brownish red gas of emerging is leakage point.Nitric oxide gas will not be with hydrogen
There is any chemical reaction, the most not with all devices such as the stator in generator unit stator thorax, generator amature, stator cooling water pipes
Occur corrosion, oxidation, adhere to, precipitation etc. is chemically or physically reacted.If sent out Anywhere on electromotor or whole hydrogen gas system
Having given birth to leakage, nitric oxide can enter in atmospheric environment by leakage point, due to its chemical characteristic, can send out with the oxygen in air
Raw quickly reaction, generates the gas with brownish red sharp aroma: nitrogen dioxide.Utilize the difference in color and nitrogen dioxide
Penetrating odor, the position finding leakage point quickly and accurately can be beneficial to.Due to nitric oxide production chemical characteristic,
Rapid with the oxygen reaction in air, and not there is strong energy response, the product nitrogen dioxide stable chemical nature of generation,
Color is eye-catching, has penetrating odor, it is simple to finds and searches.
Volume and the electromotor hydrogen cooling system of the nitric oxide gas of electromotor it is supplemented in by hydrogen make pipeline
The volume ratio of interior hydrogen is less than 0.02.Nitrogen dioxide is the gaseous material of a kind of high activity, can cause environmental hazard, to water
Body, soil and air can pollute, and these product are combustion-supporting, poisonous, tool zest damage respiratory tract.Need strict time actually used
Control nitric oxide production usage amount, to avoid occurrence injury accident.Simultaneously need to be easy to observe when taking into account detection leakage point, we
The volume ratio of the hydrogen in the volume of nitric oxide gas and electromotor hydrogen cooling system is controlled within 2% scope (one
Nitrogen oxide gas and hydrogen gas volume ratio are not more than 1:50).
The position detecting brownish red gas of emerging is to observe detection by manual site, and testing staff should use positive-pressure type
Respiratory organ carries out security protection.Though this method is simple, but there is certain danger, need operation during Site Detection
Personnel use strict safety prevention measure, to try to avert accidents..
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Any amendment, equivalent and the improvement etc. made within principle, should be included within the scope of the present invention.
Claims (3)
1. one kind utilizes the method that tracer searches hydrogen cooled generator group leakage point online, it is characterised in that under step enters: pass through
The hydrogen make pipeline of electromotor is filled with nitric oxide gas in electromotor, in treating nitric oxide gas and hydrogen cooling system
Hydrogen mix homogeneously after, the emerge position of brownish red gas of detection is leakage point.
A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online, its feature exists
In: volume and the hydrogen in electromotor hydrogen cooling system of the nitric oxide gas of electromotor it is supplemented in by hydrogen make pipeline
The volume ratio of gas is less than 0.02.
A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online, its feature exists
In: the position detecting brownish red gas of emerging is to observe detection by manual site, and testing staff should use positive-pressure type to breathe
Device carries out security protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610708365.9A CN106289665A (en) | 2016-08-23 | 2016-08-23 | A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201610708365.9A CN106289665A (en) | 2016-08-23 | 2016-08-23 | A kind of method utilizing tracer to search hydrogen cooled generator group leakage point online |
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| CN106289665A true CN106289665A (en) | 2017-01-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389275A (en) * | 2017-08-04 | 2017-11-24 | 大唐东北电力试验研究所有限公司 | Heat exchangers for district heating leakage detection system and method |
| CN109682548A (en) * | 2018-12-07 | 2019-04-26 | 华润电力（贺州）有限公司 | A kind of online leak hunting method of hydrogen cooler of generator |
| CN109827715A (en) * | 2019-02-28 | 2019-05-31 | 重庆昌兴塑胶有限责任公司 | Pipeline surveys bad point device |
| CN110702331A (en) * | 2019-11-14 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司大理局 | Water leakage detection method, device and equipment based on converter station valve internal cooling system |
| CN114636523A (en) * | 2022-05-17 | 2022-06-17 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389275A (en) * | 2017-08-04 | 2017-11-24 | 大唐东北电力试验研究所有限公司 | Heat exchangers for district heating leakage detection system and method |
| CN109682548A (en) * | 2018-12-07 | 2019-04-26 | 华润电力（贺州）有限公司 | A kind of online leak hunting method of hydrogen cooler of generator |
| CN109827715A (en) * | 2019-02-28 | 2019-05-31 | 重庆昌兴塑胶有限责任公司 | Pipeline surveys bad point device |
| CN109827715B (en) * | 2019-02-28 | 2020-08-25 | 重庆昌兴塑胶有限责任公司 | Bad point measuring device for pipeline |
| CN110702331A (en) * | 2019-11-14 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司大理局 | Water leakage detection method, device and equipment based on converter station valve internal cooling system |
| CN114636523A (en) * | 2022-05-17 | 2022-06-17 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
| CN114636523B (en) * | 2022-05-17 | 2023-05-26 | 浙江大学 | Carrier gas bin testing device for hydrogen conveying pipeline |
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Application publication date: 20170104 |
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