CN1064270C - Hydrogen drying method for electric generator - Google Patents
Hydrogen drying method for electric generator Download PDFInfo
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- CN1064270C CN1064270C CN96116438A CN96116438A CN1064270C CN 1064270 C CN1064270 C CN 1064270C CN 96116438 A CN96116438 A CN 96116438A CN 96116438 A CN96116438 A CN 96116438A CN 1064270 C CN1064270 C CN 1064270C
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- hydrogen
- generator
- regeneration
- drier
- drying
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Abstract
The present invention relates to a method for circularly drying hydrogen of a generator. Hydrogen in the generator is dried in the forced circulation with a high flow rate by magnetic force driving fan. Drying modes is a double barrel switching over type adsorption drying, a regeneration mode is self drying hydrogen heat regeneration. When a drier is used for drying, the other drier is used for regeneration under the same pressure. Regenerated hydrogen returns to at an inlet of the magnetic force driving fan, and is circularly used. Two circular flow rates can be adjusted, and the process is full automatic. The present invention can reduce the humidity of the hydrogen in the generator, and can reduce adverse effects caused by the moisture content of the hydrogen to the safe operation of the generator.
Description
The present invention relates to the removal moisture drying method of hydrogen, especially for the dry field of hydrogen in the hydrogen-cooled generator.
The too high meeting of hydrogen humidity makes generator iron core surface oxidisation in the hydrogen cooled generator, and the rotor winding makes moist, and insulation resistance reduces, and causes generator short circuit to blow out accident.When hydrogen humidity is very big near working relative humidity, can make retaining ring crackle and can very fast expansion, especially 18MnCr retaining ring occur, its stress is very responsive to humidity.Hydrogen humidity greatly also can make hydrogen purity reduction in the machine, causes draft loss to increase and the reduction cooling effectiveness.So hydrogen humidity is very big to the safe operation influence of generator, more and more causes people's attention.
In prior art, in order to reduce hydrogen humidity in the generator, many power plant adopt improves the electrolytic hydrogen production system pressure, and normal using system pressure is 3.2MPa, and the hydrogen water capacity of electrolyzer outlet is reduced as far as possible, reaches 5g/m
3Also there are many power plant to adopt freeze drying plant, compressor cooling commonly used, hydrogen is by the freezing moisture content of removing in the machine.Under 0.3MPa, after the freezing drying, hydrogen humidity in the machine can be reduced to 4～12g/m
3Though freezing has obtained preferably effect and developed rapidly, can't reach the requirement of national energy portion, but also exist refrigerant compressor is had relatively high expectations, the machine long-term operation easily produces fault, and maintenance load is big, shortcomings such as installation requirement height.
The objective of the invention is in order to reduce the water capacity of hydrogen in the hydrogen-cooled generator, reduce the influence that the hydrogen water capacity is brought the safe operation of generator.
The present invention includes wet hydrogen with hydrogen cooled generator to carry out big forces traffic cyclic drying by the magnetic drive blower fan outside machine, and the hydrogen desiccation mode is the adsorption dry of bitubular suitching type.Dried hydrogen is sent back in the generator, to reduce the water capacity of hydrogen in the generator, prevents the generation of large turbo-type generator stator end short circuit accident.
The hydrogen that contains high humidity from generator removes by filter mechanical impurities earlier, and then through the supercharging of magnetic drive blower fan, the hydrogen after the supercharging enters drier again behind oil expeller.The hydrogen desiccation mode is the adsorption dry of bitubular suitching type.Adsorbent kind difference has silica gel, aluminium glue, molecular sieve etc.System pressure be O.25～0.7MPa, adsorption dry at normal temperatures.Flow 30～the 250Nm of hydrogen in drier
3/ h, this mode adsorption capacity big (the maximum water absorption of each switching cycle absorbing cylinder is 6kg), the dry degree of depth is good, can use continuously for a long time.When a drier when carrying out drying, another drier is being regenerated.Dried hydrogen major part is returned generating set and is recycled.Remaining small part hydrogen enters the drier inner core that is in reproduced state, the adsorbent bed excessively thermal regeneration that carries out of reverse flow after heating, and regeneration temperature is 80～120 ℃.Regeneration and hydrogen desiccation all carry out under same pressure.This regeneration is self dry hydrogen thermal regeneration, no regeneration gas discharging.The hydrogen that goes out drier after the regeneration dewaters through refrigerated separation, and hydrogen is then got back to above-mentioned magnetic drive fans entrance and recycled.Two circular flows can be regulated, in order to the aridity of hydrogen in the control hydrogen cooled generator.
By the hydrogen humidity after the drier dehumidifying is 0.05～4g/m
3, the humidity of dehumidifying back hydrogen the best is 0.05～1g/m
3The hydrogen of this drying returns generating set and recycles, and can make the generating set safe operation.
The present invention can the situation that the hydrogen water capacity is bigger in generator under, reduce humidity in the generator rapidly, can satisfy the needs of hydrogen desiccation in the generator.
Can use when the generator operation with drying device of the present invention, also can when generator outage, carry out the hydrogen recycle drying.
Hydrogen recycle among the present invention, the absorption of absorber and the control that regeneration is switched, regeneration is heated, the operations such as discharging of condensed water all both can be carried out under automatically, but also manual operation.
What hydrogen circulation fan adopted among the present invention is the magnetic drive blower fan, and no hydrogen leaks.The circulation of hydrogen is all undertaken by same magnetic drive blower fan when the adsorption dry of hydrogen and the regeneration of adsorbent.
In generating set, use the present invention, can reduce hydrogen humidity in the generator, reduce the influence that the hydrogen water capacity is brought the safe operation of generator.
Embodiment 1:
Configuration cycles absorption hydrogen drying unit on 200MW water hydrogen hydrogen cooled generator group, hydrogen in the generator is carried out the forced circulation drying of big flow by the magnetic drive blower fan, the hydrogen desiccation mode is bitubular adsorption dry, regeneration is self dry hydrogen thermal regeneration, regeneration gas is through water quench, after getting rid of free water, regeneration hydrogen enters blower fan import circulation again.Hydrogen Vapor Pressure is 0.35MPa in the motor, and temperature is 50 ℃, and the interior hydrogen water content of generator was 35g/m before drying device put into operation
3, drying device recycle hydrogen amount 200Nm
3/ h.Wherein the regeneration cycle amount is 40NM
3/ h, the drying cycles amount is 160Nm
3/ h.Per 24 hours displacement were reduced to 1kg gradually by 3.5kg after drying device put into operation.Absorbing cylinder switched regeneration once in 24 hours.Hydrogen humidity is by 35g/m in the generator
3Descend gradually, reduced to 5g/m in 24 hours
3, reduced to 1g/m in 48 hours
3, reduced to 0.4g/m in 72 hours
3, and stable.
Embodiment 2.
Configuration cycles absorption hydrogen drying unit on 300MW water hydrogen hydrogen cooled generator group, hydrogen in the generator is carried out the forced circulation drying of big flow by the magnetic drive blower fan, the hydrogen desiccation mode is bitubular adsorption dry, regeneration is self dry hydrogen thermal regeneration, regeneration gas is through water quench, after getting rid of free water, regeneration hydrogen enters blower fan import circulation again.Hydrogen Vapor Pressure is 0.290～0.335MPa in the motor, and temperature is 45～55 ℃, and the interior hydrogen water content of generator was 42g/m before drying device put into operation
3, drying device recycle hydrogen amount 250Nm
3/ h.Wherein the regeneration cycle amount is 50NM
3/ h, the drying cycles amount is 200Nm
3/ h.Absorbing cylinder switched once in 24 hours.After drying device put into operation, 24 hours displacement were reduced to after 1.9kg, 1.2kg to 120 hour stable to 0.3kg by 3.1kg.After drying device put into operation, absorbing cylinder switched once in 24 hours, and after putting into operation 24 hours, hydrogen humidity is reduced to 3.2g/m in the generator
3, reduced to 0.7g/m in 48 hours
3, reduced to 0.5g/m in 72 hours
3, reduced to 0.05g/m in 96 hours
3, and stable.Simultaneously the humidity of mending hydrogen not being limited, is 40～200Nm mending the hydrogen amount
3/ day, when hydrogen pressure was 0.6～1MPa, supplemental hydrogen not drying directly mended generator.
Embodiment 3.
Configuration cycles absorption hydrogen drying unit on 600MW water hydrogen hydrogen cooled generator group, hydrogen in the generator is carried out the forced circulation drying of big flow by the magnetic drive blower fan, the hydrogen desiccation mode is bitubular adsorption dry, regeneration is self dry hydrogen thermal regeneration, regeneration gas is through water quench, after getting rid of free water, regeneration hydrogen enters blower fan import circulation again.Hydrogen Vapor Pressure is 0.52MPa in the motor, and the generating built-in temperature is 45～55 ℃, and the interior hydrogen humidity of generator was 28g/m before drying device put into operation
3, drying device hydrogen recycle amount is 250Nm
3/ h.Wherein the regeneration cycle amount is 60NM
3/ h, the drying cycles amount is 190Nm
3/ h.After drying device put into operation, absorbing cylinder switched once in 24 hours.After drying device put into operation, 24 hours displacement were 2.5kg, after reduce to 1.5kg, 0.8kg to 96 hour stable to 0.2kg.After drying device put into operation, hydrogen humidity was reduced to 2.5g/m after 24 hours in the generator
3, reduced to 0.5g/m in 48 hours
3, reduced to 0.25g/m in 72 hours
3, and stable.
Claims (3)
1, a kind of hydrogen recycle drying means as generator, it is characterized in that: the hydrogen that contains high humidity from generator is removed earlier mechanical impurities after filtration, enter the supercharging of magnetic drive blower fan then, hydrogen after the supercharging is again behind oil expeller, enter adsorption dehumifier, described drier is to adopt adsorbent adsorption dry at normal temperatures, and system pressure is 0.25～0.7MPa, and the flow of hydrogen in drier is 30～250Nm
3/ h is 0.05～4g/m by the hydrogen humidity after the dehumidifying
3Major part is returned generating set and is recycled, remaining small part hydrogen enters the drier inner core that is in reproduced state, the adsorbent bed excessively thermal regeneration that carries out of reverse flow after heating, regeneration and hydrogen desiccation all carry out under same pressure, the hydrogen that goes out drier after the regeneration dewaters through refrigerated separation, and hydrogen is then got back to above-mentioned magnetic drive fans entrance and recycled.
2, according to the described hydrogen recycle drying means as generator of claim 1, it is characterized in that: the humidity of the hydrogen after the described dehumidifying is 0.05～1g/m
3
3, according to the described hydrogen recycle drying means as generator of claim 1, it is characterized in that: described drier regeneration temperature is 60～120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116438A CN1064270C (en) | 1996-07-24 | 1996-07-24 | Hydrogen drying method for electric generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96116438A CN1064270C (en) | 1996-07-24 | 1996-07-24 | Hydrogen drying method for electric generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1171287A CN1171287A (en) | 1998-01-28 |
| CN1064270C true CN1064270C (en) | 2001-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96116438A Expired - Fee Related CN1064270C (en) | 1996-07-24 | 1996-07-24 | Hydrogen drying method for electric generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1064270C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5861780B2 (en) * | 2012-06-25 | 2016-02-16 | 日産自動車株式会社 | Water electrolysis system |
| CN112933867A (en) * | 2021-01-29 | 2021-06-11 | 国网河北省电力有限公司衡水供电分公司 | Sulfur hexafluoride gas recovery system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61178019A (en) * | 1985-02-01 | 1986-08-09 | Osaka Gas Co Ltd | Dehydration of made-up gas |
| CN2079384U (en) * | 1990-11-05 | 1991-06-19 | 上海市江湾化工机械厂机电分厂 | Cooling type hydrogen dryer |
| CN2243331Y (en) * | 1995-09-10 | 1996-12-25 | 李明生 | Regenerating apparatus for air adsorbing drying agent by indirectly heating using waste heat |
-
1996
- 1996-07-24 CN CN96116438A patent/CN1064270C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61178019A (en) * | 1985-02-01 | 1986-08-09 | Osaka Gas Co Ltd | Dehydration of made-up gas |
| CN2079384U (en) * | 1990-11-05 | 1991-06-19 | 上海市江湾化工机械厂机电分厂 | Cooling type hydrogen dryer |
| CN2243331Y (en) * | 1995-09-10 | 1996-12-25 | 李明生 | Regenerating apparatus for air adsorbing drying agent by indirectly heating using waste heat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1171287A (en) | 1998-01-28 |
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Granted publication date: 20010411 Termination date: 20120724 |