CN206801620U - A kind of Combined Cycle Unit axle envelope electric heater system - Google Patents
A kind of Combined Cycle Unit axle envelope electric heater system Download PDFInfo
- Publication number
- CN206801620U CN206801620U CN201720657658.9U CN201720657658U CN206801620U CN 206801620 U CN206801620 U CN 206801620U CN 201720657658 U CN201720657658 U CN 201720657658U CN 206801620 U CN206801620 U CN 206801620U
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- CN
- China
- Prior art keywords
- electric heater
- steam turbine
- combined cycle
- axle envelope
- cycle unit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of Combined Cycle Unit axle envelope electric heater system, gas turbine, waste heat boiler, steam turbine, surge tank, condenser, heater, labyrinth casing；Gas turbine connects waste heat boiler, and steam turbine is front and rear to set labyrinth casing, and first connection steam turbine of waste heat boiler, Article 2 connection heater is again by the labyrinth casing before and after surge tank connection steam turbine, surge tank overflow to condenser.The beneficial effects of the utility model, shaft seal steam temperature can rapidly be brought up to the temperature to match with high pressure Inner cylinders, the characteristics of Combined Cycle Unit quickly starts is realized in the case where not influenceing the steam turbine start-stop time life-span, while avoids the phenomenon that long-time heating coil causes natural gas to waste.
Description
Technical field
It the utility model is related to a kind of Combined Cycle Unit, more particularly to a kind of Combined Cycle Unit axle envelope electrical heating
Device system.
Background technology
Gas turbine combined cycle power plant unit is that gas turbine, generator and waste heat boiler, steam turbine collectively constitute
The circulatory system, it be by the weary flue gas of the high temperature discharged after gas turbine work done by waste heat boiler recovery be converted to steam, send
Enter steam turbine generating, or the exhaust steam after the generating work done of part is used for heat supply.Common form has gas turbine, steam turbine
The single shaft combined cycle of a generator is coaxially promoted, also has gas turbine, steam turbine respectively more with generator combination respectively
Axle combined cycle.It is mainly used in generating and cogeneration of heat and power.
Combined Cycle Unit requires that start and stop are rapid, and combustion engine starts to be completed simultaneously with boiler heating boosting.Because steam turbine is hot
Need to vacuumize after first throwing axle envelope in start-up course, high pressure Inner cylinder cylinder temperature is higher, and axle envelope surge tank must reach matching
Could shaft seal steam forward after temperature.
The surge tank heating coil time is longer during steam turbine hot starting, hot start, seriously constrains Combined Cycle Unit and quickly starts
The characteristics of, while long-time heating coil causes the waste of natural gas.Combined Cycle Unit typically takes two kinds of measures at present：
(1) the quick start-up characteristic of combined cycle is sacrificed, is increased to after satisfaction requires to enter surge tank after main steam temperature
Row heating coil puts into axle envelope again after being matched with high pressure Inner cylinder cylinder temperature, while also needs to take measures to ensure that boiler boosting is controllable.
The measure is safe and reliable, but the startup time is longer, and a large amount of natural gases are wasted during heating coil.
(2) the start-stop time life-span of steam turbine is sacrificed, the temperature requirement of shaft seal steam is reduced, shortens Combined Cycle Unit
The startup time.
Although the measure can reach the purpose quickly started, but for a long time with less than high pressure Inner cylinder temperature it is excessive in the case of
Start, shorten the service life of steam turbine, long-play causes device damage.
Utility model content
Technical problem to be solved in the utility model is the provision of a kind of Combined Cycle Unit axle envelope electric heater system
System, overcomes the shortcomings of existing method, shortens Combined Cycle Unit in the case where not influenceing the steam turbine start-stop time life-span and starts
Time, natural gas dosage is saved, reach energy-conservation and the quick purpose for starting while realizing.
The utility model is that solve above-mentioned technical problem by the following technical programs：The utility model includes combustion steamer
Machine, waste heat boiler, steam turbine, surge tank, condenser, heater, labyrinth casing；Gas turbine connects waste heat boiler, before steam turbine
After labyrinth casing is set, first connection steam turbine of waste heat boiler, Article 2 connection heater connects by surge tank again
Connect the labyrinth casing before and after steam turbine, surge tank overflow to condenser.
Preferably, the heater is electric heater, and electric heater one end connects waste heat boiler, and other end connection is pressed
Case.
Preferably, set on the electric heater and press hydrophobic equipment, the no pressure without pressing hydrophobic equipment and have all the way all the way
Hydrophobic equipment is without the hydrophobic main pipe of pressure, and it is hydrophobic development unit to have the hydrophobic equipment of pressure.
Preferably, the both ends of an electric heater bypass in parallel, is all provided with the electric heater both ends and bypass
Put a manually operated door for being used to control steam to convey.
Preferably, the steam turbine is condensing-type steam turbine.
Preferably, the axle envelope for adjusting steam flow is also set up between the waste heat boiler and heater and supplies regulation
Valve.
Preferably, the heater heated perimeter is 60 DEG C -500 DEG C.
Preferably, in addition to one or two generator, gas turbine and the coaxially connected generator of steam turbine or
Gas turbine, steam turbine connect a generator respectively.
Preferably, set on the surge tank all the way without pressing hydrophobic equipment and have the hydrophobic equipment of pressure all the way, it is described thin without pressure
Wetting system is that nothing presses jellyfish pipe, and it is hydrophobic development unit to have the hydrophobic equipment of pressure.
Preferably, in addition to main inlet throttle-stop valve, one end connection waste heat boiler, the other end connect steam turbine；Also include manually operated door,
A manually operated door is set between the surge tank connection turbine inlet, set between the steam turbine exports connection surge tank
One manually operated door, a manually operated door is set between the surge tank connects condenser.
The utility model has advantages below compared with prior art：The utility model can be rapid by shaft seal steam temperature
The temperature to match with high pressure Inner cylinders is brought up to, combined cycle is realized in the case where not influenceing the steam turbine start-stop time life-span
The characteristics of unit quickly starts, while avoid the phenomenon that long-time heating coil causes natural gas to waste.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
The heater 6 of 4 condenser of gas turbine 1 waste heat boiler, 2 steam turbine, 3 surge tank 5 is dredged without jellyfish pipe 61 is pressed
The main inlet throttle-stop valve 10 of 8 generator of water flash vessel 62 manually operated door, 7 shaft seal steam regulating valve 9
Embodiment
Embodiment of the present utility model is elaborated below, the present embodiment using technical solutions of the utility model before
Put and implemented, give detailed embodiment and specific operating process, but the scope of protection of the utility model is unlimited
In following embodiments.
As shown in figure 1, the present embodiment includes gas turbine 1, waste heat boiler 2, steam turbine 3, surge tank 4, condenser
5, heater 6, labyrinth casing (does not mark) in figure；Gas turbine 1 connects waste heat boiler 2,2 first connection vapour of waste heat boiler
Turbine 3, steam turbine 3 is front and rear to set labyrinth casing (not marked in figure), and Article 2 connection heater 6 connects by surge tank 4 again
Connect the labyrinth casing before and after steam turbine 3, the overflow of surge tank 4 to condenser 5.
The heater 6 is electric heater, and electric heater one end connects waste heat boiler 2, other end connection surge tank 4.Institute
State and set on electric heater all the way without pressing hydrophobic equipment and have the hydrophobic equipment of pressure all the way, it is described without pressing hydrophobic equipment to press water for nothing
Main pipe 61, it is hydrophobic development unit 62 to have the hydrophobic equipment of pressure.
The bypass in parallel of the both ends of the electric heater, a use is respectively provided with the electric heater both ends and bypass
In the manually operated door 7 of control steam conveying.The steam turbine 3 is condensing-type steam turbine.In the waste heat boiler 2 and heater 6
Between also set up for adjust steam flow axle envelope supply regulating valve 8.The gland heater heated perimeter is 60 DEG C -500
℃。
Also include one or two generator 9,3 coaxially connected generators 9 of gas turbine 1 and steam turbine or combustion vapour
Turbine 1, steam turbine 3 connect a generator 9 respectively.Set on the surge tank 4 all the way without pressing hydrophobic equipment and have pressure all the way
Hydrophobic equipment, described without pressing hydrophobic equipment to press jellyfish pipe 61 for nothing, it is hydrophobic development unit 62 to have the hydrophobic equipment of pressure.Also include master
Porthole 10, one end connection waste heat boiler 2, other end connection steam turbine 3；Also include manually operated door 7, vapour is connected in the surge tank 4
One manually operated door 7 is set between the entrance of turbine 3, a manually operated door 7 is set between the steam turbine 3 exports connection surge tank 4,
A manually operated door 7 is set between the surge tank 4 connects condenser 5.
Gas turbine 1 is done work in utility model works process, combustion of natural gas driving, the weary cigarette of the high temperature discharged after acting
Water heating is converted to steam by gas by waste heat boiler 2, and high steam can be controlled feeding steam turbine 3 to be sent out by main inlet throttle-stop valve 10
Electricity.When the exhausted temperature heat discharged when gas turbine 1 starts at the beginning is not high, the heating effect of waste heat boiler 2 is caused
It is bad, so caused high steam temperature, pressure can not meet the requirement of gland steam, now need to be in the hot starting, hot start of steam turbine 3
During to open axle envelope 6 bodies of electric heater hydrophobic, temperature is set to the required temperature reached, opens shaft seal steam regulation
Valve 8 heats to main steam, starts when being heated to required steam supply temperature to shaft seal steam, so as to shorten steam turbine 3
The startup time.Therefore, the utility model shortens Combined Cycle Unit in the case where not influenceing the start-stop time life-span of steam turbine 3
Start the time, save natural gas dosage, reach energy-conservation with quickly starting while realizing.Consider further that electric heater breaks down
Emergency situations, electric heater in parallel set a bypass, reduce potential safety hazard.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of Combined Cycle Unit axle envelope electric heater system, it is characterised in that including gas turbine, waste heat boiler, steamer
Machine, surge tank, condenser, heater, labyrinth casing；Gas turbine connects waste heat boiler, and steam turbine is front and rear to set labyrinth casing, waste heat
First connection steam turbine of boiler, Article 2 connection heater is again by the packing before and after surge tank connection steam turbine
Body, surge tank overflow to condenser.
A kind of 2. Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that the heating
Device is electric heater, and electric heater one end connects waste heat boiler, other end connection surge tank.
3. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 2, it is characterised in that the electricity adds
Set on hot device all the way without pressing hydrophobic equipment and have the hydrophobic equipment of pressure all the way, it is described without press hydrophobic equipment be without the hydrophobic main pipe of pressure,
It is hydrophobic development unit to have the hydrophobic equipment of pressure.
4. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 2, it is characterised in that the electricity adds
The bypass in parallel of the both ends of hot device, one is respectively provided with the electric heater both ends and bypass and is used to control what steam conveyed
Manually operated door.
A kind of 5. Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that the steamer
Machine is condensing-type steam turbine.
6. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that described remaining
The axle envelope for adjusting steam flow is also set up between heat boiler and heater and supplies regulating valve.
A kind of 7. Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that the heating
Device heated perimeter is 60 DEG C -500 DEG C.
8. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that also including one
Individual or two generators, gas turbine and the coaxially connected generator of steam turbine or gas turbine, steam turbine connect respectively
One generator.
9. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that described to press
Set on case all the way without pressing hydrophobic equipment and have the hydrophobic equipment of pressure all the way, it is described without pressing hydrophobic equipment to press jellyfish pipe for nothing, have
It is hydrophobic development unit to press hydrophobic equipment.
10. a kind of Combined Cycle Unit axle envelope electric heater system according to claim 1, it is characterised in that also include
Main inlet throttle-stop valve, one end connection waste heat boiler, other end connection steam turbine；Also include manually operated door, steam turbine is connected in the surge tank
One manually operated door is set between entrance, a manually operated door is set between the steam turbine exports connection surge tank, described equal
Press case that a manually operated door is set between connecting condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720657658.9U CN206801620U (en) | 2017-06-07 | 2017-06-07 | A kind of Combined Cycle Unit axle envelope electric heater system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720657658.9U CN206801620U (en) | 2017-06-07 | 2017-06-07 | A kind of Combined Cycle Unit axle envelope electric heater system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206801620U true CN206801620U (en) | 2017-12-26 |
Family
ID=60745217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720657658.9U Expired - Fee Related CN206801620U (en) | 2017-06-07 | 2017-06-07 | A kind of Combined Cycle Unit axle envelope electric heater system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206801620U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425706A (en) * | 2018-04-28 | 2018-08-21 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of shaft seal steam supply system and its control method for double reheat power generation sets |
| CN109026188A (en) * | 2018-09-14 | 2018-12-18 | 雷泽永 | A kind of steam turbine speed control oil pump using steam overbottom pressure |
| CN113431684A (en) * | 2021-06-18 | 2021-09-24 | 湖北华电武昌热电有限公司 | Control method, device and equipment for gas circulating unit and storage medium |
| CN114008300A (en) * | 2019-09-11 | 2022-02-01 | 三菱动力株式会社 | Steam turbine |
| CN115788606A (en) * | 2022-12-15 | 2023-03-14 | 东方电气集团东方汽轮机有限公司 | Heat accumulating type shaft seal electric heating system and control method |
-
2017
- 2017-06-07 CN CN201720657658.9U patent/CN206801620U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425706A (en) * | 2018-04-28 | 2018-08-21 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of shaft seal steam supply system and its control method for double reheat power generation sets |
| CN108425706B (en) * | 2018-04-28 | 2023-11-14 | 中国大唐集团科学技术研究院有限公司华东分公司 | Shaft seal steam supply system for secondary reheating unit and control method of shaft seal steam supply system |
| CN109026188A (en) * | 2018-09-14 | 2018-12-18 | 雷泽永 | A kind of steam turbine speed control oil pump using steam overbottom pressure |
| CN109026188B (en) * | 2018-09-14 | 2024-01-16 | 雷泽永 | Steam turbine speed regulating oil pump using residual steam pressure |
| CN114008300A (en) * | 2019-09-11 | 2022-02-01 | 三菱动力株式会社 | Steam turbine |
| CN114008300B (en) * | 2019-09-11 | 2023-10-03 | 三菱重工业株式会社 | steam turbine |
| US11859505B2 (en) | 2019-09-11 | 2024-01-02 | Mitsubishi Heavy Industries, Ltd. | Steam turbine |
| CN113431684A (en) * | 2021-06-18 | 2021-09-24 | 湖北华电武昌热电有限公司 | Control method, device and equipment for gas circulating unit and storage medium |
| CN115788606A (en) * | 2022-12-15 | 2023-03-14 | 东方电气集团东方汽轮机有限公司 | Heat accumulating type shaft seal electric heating system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20180607 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |