CN206397550U - Low pressure cylinder cooling system after steam turbine optical axis heat supply transformation - Google Patents
Low pressure cylinder cooling system after steam turbine optical axis heat supply transformation Download PDFInfo
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- CN206397550U CN206397550U CN201621093983.9U CN201621093983U CN206397550U CN 206397550 U CN206397550 U CN 206397550U CN 201621093983 U CN201621093983 U CN 201621093983U CN 206397550 U CN206397550 U CN 206397550U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The utility model is related to low pressure cylinder cooling system after a kind of steam turbine optical axis heat supply transformation, including intermediate pressure cylinder, steam jet ejector and pipeline, the first entrance of the steam jet ejector is connected with medium pressure cylinder exhaust steam end, the second entrance of the steam jet ejector is connected with feed pump turbine exhaust steam end, the outlet of the steam jet ejector is connected with low pressure (LP) cylinder steam inlet, the part steam discharge of the steam jet ejector by the use of intermediate pressure cylinder, which draws gas, is used as driving vapour source, aspirate the exhaust steam of feed pump turbine, by temperature, the of a relatively high intermediate pressure cylinder steam discharge of pressure and temperature, trip temperature is entered in the relatively low feed pump turbine exhaust steam of pressure, pressure match, and use the steam after matching for optical axis cooling in low pressure (LP) cylinder, low pressure cylinder cooling system after a kind of steam turbine optical axis heat supply transformation of the present utility model, feed pump turbine exhaust steam low grade residual heat is reclaimed, middle row is saved to draw gas；The heat regenerative system amount of drawing gas after transformation is added, heat regenerative system efficiency is improved.
Description
Technical field
The utility model is related to steam turbine heat supply transformation technical field of energy utilization, and in particular to a kind of steam turbine optical axis is supplied
Low pressure cylinder cooling system after heat transformation.
Background technology
At present, under the encouraging and facilitating of national energy-saving emission reduction policy, each electricity power enterprise is in the area for possessing heat supply condition
Implement cogeneration of heat and power and heat capacity is increased by technological transformation, improve heat supply running economy, it has also become inexorable trend.
In order to improve the efficiency and safety in operation of unit, make large-scale condensing-type unit into thermal power plant unit, substantially there is three
The method of kind：One is on the steam turbine height, intermediate pressure cylinder of former condensing-type unit or on mesolow conduit, according to different heat supply pressure
Grade needs, and is drawn gas in different position punchings；Two be to be transformed the low-pressure cylinder and rotor of steam turbine, is replaced by back pressure
Thermal power plant unit, there is turbine discharge direct heating；Three be by transforming low pressure (LP) cylinder and rotor or being improved only by combustion adjustment
Back pressure, improves original circulating water temperature, by recirculated water is come heat supply by the rise of back pressure.
There is condenser to be changed to back pressure unit steam supply in steam turbine, can effectively improve the cycle efficieny of unit, but need
There is continual heat user, when back pressure unit is used for heating, other seasons in addition to winter cannot utilize.
Continual generating can be realized by more exchanging rotor in different seasons by the transformation patterns of the double back pressures of Shuangzi for this, and vapour
Turbine optical axis heat supply process is exactly a kind of heat supply pattern of the double back pressures of birotor.
Optical axis transformation is to make existing steam turbine into non-condensing thermal power plant unit, and low pressure (LP) cylinder does not enter vapour, and main steam is by high pressure
Main inlet throttle-stop valve, high voltage adjusting porthole do work into high intermediate pressure cylinder.Middle pressure vapour (excision of low plus regenerative steam) fully enters heat supply network and added
Hot device heat supply.Low pressure rotor is removed, and is replaced with an optical axis, connection High inter case and generator, is played the work of transmission moment of torsion
With.Run in Heating Period unit using optical axis scheme, i.e., back pressure machine is run, condensation mode fortune is switched back into non-heating period unit.
This renovation technique can reclaim reason low pressure (LP) cylinder into condenser exhaust steam heat, not have low pressure rotor acting after transformation, steam does not have
There is enthalpy drop, heat supply network as much as possible can be made to be used for heat supply.
Optical axis heat supply transformation after, due to low pressure gas in the jar with rotate optical axis frictional heating, it is necessary to be passed through special steaming
Vapour is cooled down to it, it is ensured that the security of unit.Common solution is to extract the part steam discharge pressure and temperature reducing of intermediate pressure cylinder
Cooled down afterwards into low pressure (LP) cylinder, the advantage of this method is that external heating load is larger, while the generating in other seasons is not influenceed, but
It is that the intermediate pressure cylinder some vapor extracted is only discharged into low pressure (LP) cylinder without externally acting, while increased temperature-decreased pressure reducer also consumes
Effective steam energy, so as to cause the waste of energy.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide low pressure after a kind of steam turbine optical axis heat supply transformation
Cylinder cooling system, by the use of a small amount of intermediate pressure cylinder steam discharge as driving steam, driving steam jet ejector reclaims feed pump steamer
Machine part low temperature, low pressure exhaust steam, output are available for the steam that low pressure (LP) cylinder is cooled down, and have reclaimed feed pump turbine exhaust steam low-grade remaining
Heat, saves middle row and draws gas；The heat regenerative system amount of drawing gas after transformation is added, heat regenerative system efficiency is improved.
Low pressure cylinder cooling system after a kind of steam turbine optical axis heat supply transformation of the present utility model, including the spray of intermediate pressure cylinder, steam
Compressor reducer and pipeline are penetrated, the first entrance of the steam jet ejector is connected with medium pressure cylinder exhaust steam end, the steam spray
The second entrance for penetrating compressor reducer is connected with feed pump turbine exhaust steam end, and the outlet of the steam jet ejector is entered with low pressure (LP) cylinder
Vapour end is connected, and the steam jet ejector is used as driving vapour source, suction feed pump turbine by the use of the part steam discharge of intermediate pressure cylinder
Exhaust steam, the of a relatively high intermediate pressure cylinder steam discharge of temperature, pressure and the relatively low feed pump turbine exhaust steam of temperature, pressure are entered
Trip temperature, pressure match, and the steam after matching is used for optical axis cooling in low pressure (LP) cylinder；
Low pressure cylinder cooling system coordinates and made when low pressure (LP) cylinder optical axis is run during heating after the steam turbine optical axis heat supply transformation
With during heating, turbine low pressure cylinder optical axis operation, the steam discharge of intermediate pressure cylinder enters heat exchangers for district heating, passes through heat supply network recirculated water
Used after heat exchange for outer net, in non-heating period, the low pressure (LP) cylinder rotor operation of steam turbine, intermediate pressure cylinder steam discharge does work into low pressure (LP) cylinder,
Steam turbine recovers pure condensate operating mode and run, steam discharge Parameter reconstruction to normal level, and now steam jet ejector is stopped using.
Further, to be provided with first on medium pressure cylinder to the first entrance pipeline of steam jet ejector electronic adjustable
The second electronic adjustable valve is provided with valve, the second entrance pipeline of the feed pump turbine to steam jet ejector.
Further, jet chimney is arranged in steam turbine platform, the steam access low pressure (LP) cylinder after temperature, pressure match is entered into vapour
Mouthful, steam discharge after low pressure (LP) cylinder cooling with low-pressure heater outlet is hydrophobic is passed through condensate system.
Further, intermediate pressure cylinder steam discharge, which is connected with, is equipped with perforate, and cooling steam enters at intermediate pressure cylinder and low pressure (LP) cylinder communicating pipe,
Steam sequentially passes through low pressure (LP) cylinder along the nozzle of dividing plate, and optical axis is cooled down, the size and intermediate pressure cylinder of cooling steam pipeline
The bore size of communicating pipe cooling steam amount needed for is determined with steam flowing pressure.
Further, cooling steam enters from the non-return flap front end of drawing gas of low-pressure heater extraction line, cooling steam
Steam discharge goes to condenser by the perforate of intermediate pressure cylinder and low pressure (LP) cylinder communicating pipe.
By such scheme, the utility model at least has advantages below：The system is made using a small amount of intermediate pressure cylinder steam discharge
For driving steam, driving steam jet ejector reclaims feed pump turbine part low temperature, low pressure exhaust steam, and output is available for low pressure (LP) cylinder
The steam of cooling, has reclaimed feed pump turbine exhaust steam low grade residual heat, saves middle row and draws gas；Add backheat system after transformation
The system amount of drawing gas, improves heat regenerative system efficiency.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, with preferred embodiment of the present utility model and coordinate accompanying drawing detailed below
Describe in detail bright as after.
Brief description of the drawings
Fig. 1 is the schematic diagram of low pressure cylinder cooling system after steam turbine optical axis heat supply transformation of the present utility model.
Embodiment
With reference to the accompanying drawings and examples, embodiment of the present utility model is described in further detail.Below
Embodiment is used to illustrate the utility model, but is not limited to scope of the present utility model.
Low pressure cylinder cooling system bag after a kind of steam turbine optical axis heat supply transformation described in the preferred embodiment of the utility model one
Intermediate pressure cylinder 1 is included, steam jet ejector 4, Steam Turbine Through IP Admission is electronic adjustable to steam jet ejector inlet duct and first
Valve 6, feed pump turbine is vented to steam jet ejector inlet duct and the second electronic adjustable valve 5, feed pump steamer
Machine 2, low pressure (LP) cylinder 3, steam inlet pipe road and cooling steam discharge line 7, first entrance and the intermediate pressure cylinder 1 of steam jet ejector 4
It is connected, the second entrance of steam jet ejector 4 is connected with feed pump turbine 2, the outlet of steam jet ejector 4 and low pressure
Cylinder 3 is connected.
Steam jet ejector 4 is arranged near the steam drain of feed pump turbine 2, is easy to extract low-temp low-pressure exhaust steam.
The most steam discharges of intermediate pressure cylinder 1 directly transfer to heating system by pipeline, and heating network heating is used.Only extract a small amount of intermediate pressure cylinder
Steam discharge is as the driving heat source of steam jet ejector 4, and steam jet ejector 4 is extracted after the exhaust steam of feed pump steamer 2, by temperature
Trip temperature, pressure are entered in the of a relatively high intermediate pressure cylinder steam discharge of degree, pressure and the relatively low feed pump turbine exhaust steam of temperature, pressure
Matching, and the jet chimney by being arranged on steam turbine platform, vapour is entered by the steam access low pressure (LP) cylinder 3 after temperature, pressure match
Mouthful.
The steam admission mode of low pressure (LP) cylinder cooling steam has two schemes：One is that, in intermediate pressure cylinder steam discharge communicating pipe perforate, cooling is steamed
Vapour enters at former intermediate pressure cylinder and low pressure (LP) cylinder communicating pipe, and nozzle of the steam along dividing plate sequentially passes through low pressure (LP) cylinder 3, and optical axis is carried out
Cooling, to be determined in practical application according to required cooling steam amount and steam flowing pressure the size of cooling steam pipeline 7 with
And the bore size of intermediate pressure cylinder communicating pipe.
Another, which enters vapour scheme, is entered from the non-return flap front end of drawing gas of a certain section of low-pressure heater extraction line, cold
But the steam discharge of steam goes to condenser by the perforate of intermediate pressure cylinder and low pressure (LP) cylinder communicating pipe.The advantage of the program be intermediate pressure cylinder with it is low
The gland steam exhauster newly opened of cylinder pressure communicating pipe is smaller.But this scheme steam need to inversely flow through static cascade, flow resistance is increased.In reality
In, specific embodiment should be selected according to field condition.
The first electronic adjustable valve is provided with the first entrance pipeline of Steam Turbine Through IP Admission 1 to steam jet ejector 4
Door 6, is provided with the second electronic adjustable valve 5 at the second entrance pipeline of feed pump turbine 2 to steam jet ejector 4,
The aperture of the second electronic adjustable valve 6 of electronic adjustable valve 5 and first is adjusted according to unit different load, is ensureing low pressure (LP) cylinder light
Under the requirement of axle cooling, optimize the rate of air sucked in required of intermediate pressure cylinder steam discharge, improve the economy of unit operation.
When low pressure cylinder cooling system mainly coordinates low pressure (LP) cylinder optical axis operation during heating after steam turbine optical axis heat supply transformation
Use, during heating, turbine low pressure cylinder optical axis operation, intermediate pressure cylinder steam discharge enters heat exchangers for district heating, passes through heat supply network recirculated water
Used after heat exchange for outer net, in non-heating period, the low pressure (LP) cylinder rotor operation of steam turbine, intermediate pressure cylinder steam discharge does work into low pressure (LP) cylinder 3,
Steam turbine recovers pure condensate operating mode and run, steam discharge Parameter reconstruction to normal level, and now steam jet ejector 4 is stopped using.
Described above is only preferred embodiment of the present utility model, is not limited to the utility model, it is noted that
For those skilled in the art, on the premise of the utility model technical principle is not departed from, it can also do
Go out some improvement and modification, these improvement and modification also should be regarded as protection domain of the present utility model.
Claims (5)
1. low pressure cylinder cooling system after a kind of steam turbine optical axis heat supply transformation, including intermediate pressure cylinder (1), steam jet ejector (4)
And pipeline, it is characterised in that the first entrance of the steam jet ejector (4) is connected with medium pressure cylinder (1) exhaust steam end, institute
The second entrance for stating steam jet ejector (4) is connected with feed pump turbine (2) exhaust steam end, the steam jet ejector
(4) outlet is connected with low pressure (LP) cylinder (3) admission end, and the steam jet ejector (4) is made using the part steam discharge of intermediate pressure cylinder (1)
For driving vapour source, the exhaust steam of suction feed pump turbine (2), by the of a relatively high intermediate pressure cylinder steam discharge of temperature, pressure and temperature, pressure
Trip temperature, pressure match are entered in the relatively low feed pump turbine exhaust steam of power, and the steam after matching is cold for low pressure (LP) cylinder (3) interior optical axis
But use；
Low pressure cylinder cooling system coordinates after the steam turbine optical axis heat supply transformation uses when low pressure (LP) cylinder optical axis is run during heating,
During heating, turbine low pressure cylinder optical axis operation, the steam discharge of intermediate pressure cylinder (1) enters heat exchangers for district heating, changed by heat supply network recirculated water
Used after heat for outer net, in non-heating period, the low pressure (LP) cylinder rotor operation of steam turbine, intermediate pressure cylinder steam discharge does work into low pressure (LP) cylinder (3),
Steam turbine recovers pure condensate operating mode and run, steam discharge Parameter reconstruction to normal level, and now steam jet ejector (4) is stopped using.
2. low pressure cylinder cooling system after steam turbine optical axis heat supply transformation according to claim 1, it is characterised in that steam turbine
The first electronic adjustable valve (6) is provided with intermediate pressure cylinder (1) exhaust steam end to the pipeline of steam jet ejector (4) first entrance,
It is electronic adjustable that second is provided with feed pump turbine (2) exhaust steam end to steam jet ejector (4) second entrance pipeline
Valve (5).
3. low pressure cylinder cooling system after steam turbine optical axis heat supply transformation according to claim 2, it is characterised in that in steam turbine
The steam that platform is arranged after jet chimney, temperature, pressure match accesses the air intake of low pressure (LP) cylinder (3), institute through the jet chimney
State that steam discharge and the low-pressure heater outlet after low pressure (LP) cylinder (3) cooling are hydrophobic to be passed through condensate system.
4. low pressure cylinder cooling system after steam turbine optical axis heat supply transformation according to claim 1, it is characterised in that in described
It is provided with perforate the steam discharge communicating pipe of cylinder pressure (1), cooling steam enters at intermediate pressure cylinder and low pressure (LP) cylinder communicating pipe, the cooling is steamed
Nozzle of the vapour along dividing plate sequentially passes through low pressure (LP) cylinder (3), and optical axis is cooled down, the size and intermediate pressure cylinder of cooling steam pipeline
The bore size of communicating pipe cooling steam amount needed for is determined with steam flowing pressure.
5. low pressure cylinder cooling system after steam turbine optical axis heat supply transformation according to claim 1, it is characterised in that described low
Cylinder pressure cooling steam enters from the non-return flap front end of drawing gas of low-pressure heater extraction line, and the steam discharge of cooling steam passes through intermediate pressure cylinder
Condenser is gone in perforate with low pressure (LP) cylinder communicating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093983.9U CN206397550U (en) | 2016-09-29 | 2016-09-29 | Low pressure cylinder cooling system after steam turbine optical axis heat supply transformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621093983.9U CN206397550U (en) | 2016-09-29 | 2016-09-29 | Low pressure cylinder cooling system after steam turbine optical axis heat supply transformation |
Publications (1)
| Publication Number | Publication Date |
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| CN206397550U true CN206397550U (en) | 2017-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621093983.9U Expired - Fee Related CN206397550U (en) | 2016-09-29 | 2016-09-29 | Low pressure cylinder cooling system after steam turbine optical axis heat supply transformation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049920A (en) * | 2017-11-21 | 2018-05-18 | 华电电力科学研究院 | Cut off the cooling system and method for work of low pressure (LP) cylinder heat supply |
| CN108487956A (en) * | 2018-03-28 | 2018-09-04 | 程琛 | A kind of remodeling method that low pressure (LP) cylinder zero is contributed |
| CN108952844A (en) * | 2018-07-13 | 2018-12-07 | 哈尔滨汽轮机厂有限责任公司 | A kind of 200MW super-pressure back pressure turbine |
| CN109026201A (en) * | 2018-10-11 | 2018-12-18 | 华电郑州机械设计研究院有限公司 | A kind of New Low Voltage cylinder optical axis cooling system |
| CN109404074A (en) * | 2018-11-05 | 2019-03-01 | 哈尔滨汽轮机厂有限责任公司 | A kind of overcritical optical axis heat supply transformation steam turbine of 350MW |
| CN109442530A (en) * | 2018-10-16 | 2019-03-08 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of turbine exhaust heat based on CO 2 trans-critical heat pump utilizes system |
| CN111456821A (en) * | 2020-03-25 | 2020-07-28 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Energy-efficient low pressure jar is cut heat supply cooling system entirely |
| CN114165302A (en) * | 2021-12-31 | 2022-03-11 | 哈尔滨汽轮机厂有限责任公司 | 200MW series ultrahigh pressure three-cylinder three-steam-exhaust flexible modified steam turbine |
-
2016
- 2016-09-29 CN CN201621093983.9U patent/CN206397550U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049920A (en) * | 2017-11-21 | 2018-05-18 | 华电电力科学研究院 | Cut off the cooling system and method for work of low pressure (LP) cylinder heat supply |
| CN108487956A (en) * | 2018-03-28 | 2018-09-04 | 程琛 | A kind of remodeling method that low pressure (LP) cylinder zero is contributed |
| CN108952844A (en) * | 2018-07-13 | 2018-12-07 | 哈尔滨汽轮机厂有限责任公司 | A kind of 200MW super-pressure back pressure turbine |
| CN109026201A (en) * | 2018-10-11 | 2018-12-18 | 华电郑州机械设计研究院有限公司 | A kind of New Low Voltage cylinder optical axis cooling system |
| CN109442530A (en) * | 2018-10-16 | 2019-03-08 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of turbine exhaust heat based on CO 2 trans-critical heat pump utilizes system |
| CN109404074A (en) * | 2018-11-05 | 2019-03-01 | 哈尔滨汽轮机厂有限责任公司 | A kind of overcritical optical axis heat supply transformation steam turbine of 350MW |
| CN109404074B (en) * | 2018-11-05 | 2023-10-10 | 哈尔滨汽轮机厂有限责任公司 | 350MW supercritical optical axis heat supply transformation steam turbine |
| CN111456821A (en) * | 2020-03-25 | 2020-07-28 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Energy-efficient low pressure jar is cut heat supply cooling system entirely |
| CN114165302A (en) * | 2021-12-31 | 2022-03-11 | 哈尔滨汽轮机厂有限责任公司 | 200MW series ultrahigh pressure three-cylinder three-steam-exhaust flexible modified steam turbine |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180428 Address after: 100040, 13 tower, 1301 tower, 1 tower, 1 building, 6 Galaxy Street, Beijing. Patentee after: Datang (Beijing) Energy Technology Co., Ltd. Address before: No. 2 North Agricultural Road, Changping District, Beijing Patentee before: China Datang Group Science & Technology Research Institute Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170811 Termination date: 20180929 |