CN208186473U - A kind of efficient heating system of cogeneration units being drawn based on steam - Google Patents
A kind of efficient heating system of cogeneration units being drawn based on steam Download PDFInfo
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- CN208186473U CN208186473U CN201820120278.6U CN201820120278U CN208186473U CN 208186473 U CN208186473 U CN 208186473U CN 201820120278 U CN201820120278 U CN 201820120278U CN 208186473 U CN208186473 U CN 208186473U
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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 discloses a kind of efficient heating systems of cogeneration units being drawn based on steam for belonging to heat supply process field.The system mainly includes the parts such as steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, high add-back hot systems, low add-back hot systems, steam extraction injector, heat exchangers for district heating.The system is drawn a part of low-pressure steam from low pressure (LP) cylinder extraction line, heats hot net water together after two bursts of steam mixing using Steam Turbine Through IP Admission steam discharge as driving vapour source.The utility model heats hot net water by being drawn the lower low pressure (LP) cylinder steam extraction of temperature, pressure, take full advantage of the heat of the lower steam of grade in low pressure (LP) cylinder, the steam extraction amount of high-grade intermediate pressure cylinder steam discharge is reduced while ensuring heat supply institute's calorific requirement and pressure, it is reduced simultaneously by the temperature difference of mixed steam and hot net water, Temperature Matching, heater damage is reduced, the thermal efficiency of unit is improved, reduces power plant's energy consumption.
Description
Technical field
The utility model belongs to heat supply process field, in particular to a kind of cogeneration units being drawn based on steam are efficient
Heating system.
Background technique
All the time, the energy has irreplaceable role in the production and living of the mankind, with the development of industry to energy
The demand in source is increasing, energy deficiency inevitably occurs, and the requirement to power plant's coal consumption has been gradually increased in country,
Thermal power plant implements the policy of " above pressing greatly small ".300MW grade and its unit below are mostly changed to heat supply to reach requirement
Unit, while being gradually increased in the demand of northern China winter heating, cogeneration units can carry out central heating in winter,
Just meet northern heat demand, therefore, cogeneration of heat and power has very big development potentiality in China.Cogeneration of heat and power has as one kind
The mode of effectiveness energy, advanced optimizes its system, improves the external China's energy development of its energy utilization rate and be of great significance.
Currently, China's cogeneration units, which are mostly used, coagulates heat supply, intermediate pressure cylinder using the pumping of intermediate pressure cylinder steam discharge heating hot net water
Steam discharge parameter is significantly larger than parameter needed for heat supply, will cause very big damage when being exchanged heat in heat exchangers for district heating, wastes
The high-grade energy of intermediate pressure cylinder steam discharge reduces the power output of unit, efficiency decline, and energy utilization is unreasonable.Therefore pass through optimization
The heating system of cogeneration units mostly replaces high-grade intermediate pressure cylinder steam discharge using pressure, the lower low-grade steam of temperature,
Make its Temperature Matching, damage reduces, and improves unit efficiency.
The utility model proposes one kind using Steam Turbine Through IP Admission steam discharge as driving vapour source, using steam extraction injector from low
It is drawn the lower steam of a part of temperature, pressure in cylinder pressure extraction line, heats the side of hot net water after two bursts of steam mixing together
Case.The heat for taking full advantage of the lower steam of grade in low pressure (LP) cylinder in this way, reduces high-grade while ensuring heat demand
The steam extraction amount of intermediate pressure cylinder steam discharge, while being reduced by the temperature difference of mixed steam and hot net water, temperature is more matched, is reduced
Heater damage, improves the thermal efficiency of unit, reduces power plant's energy consumption.
Summary of the invention
The purpose of this utility model is that the solidifying heat supply of pumping generallyd use for current China's cogeneration power plant leads to unit
Power output reduce, the problems such as efficiency is relatively low, and energy utilization is unreasonable, by propose it is a kind of using Steam Turbine Through IP Admission steam discharge as drive
Dynamic vapour source, the lower steam of a part of temperature, pressure, two strands of steam are drawn using steam extraction injector from low pressure (LP) cylinder extraction line
The scheme of hot net water is heated after mixing together.The heat for taking full advantage of the lower steam of grade in low pressure (LP) cylinder in this way is ensuring to supply
The steam extraction amount of high-grade intermediate pressure cylinder steam discharge is reduced while heat demand, while by the temperature difference of mixed steam and hot net water
It reduces, temperature more matches, and reduces heater damage, improves the thermal efficiency of unit, reduce power plant's energy consumption.
In order to achieve the above objectives, the utility model uses following technical scheme:
A kind of efficient heating system of cogeneration units being drawn based on steam, which mainly includes boiler, steam turbine
High pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, high add-back hot systems, low add-back hot systems, steam extraction injector and heat supply network add
Hot device；Steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder and the generator is contacted, and turbine low pressure cylinder is weary
Vapor outlet is connected with condenser entrance, sequentially enters after the steam exhaust remittance hot well condensed in condenser through condensate pump boosting low
Add-back hot systems, oxygen-eliminating device, feed pump and high add-back hot systems, are eventually returned to boiler；The Steam Turbine Through IP Admission steam discharge point
At two strands, one enters #5 low-pressure heater, one enters steam extraction injector entrance as driving vapour source by the first control valve；
Seven grades of steam extractions of the turbine low pressure cylinder are divided into two strands, one enters #7 low-pressure heater, one passes through the second control valve
It is connected with steam extraction injector entrance；The steam extraction injector entrance passes through pipeline and the first control valve and the second control valve respectively
It is connected with the seven grades of steam extractions of Steam Turbine Through IP Admission steam discharge and turbine low pressure cylinder, outlet is connected with heat exchangers for district heating entrance；It is described
High add-back hot systems, the hydrophobic of #1, #2, #3 high-pressure heater flow automatically step by step, finally converge together with the hydrophobic of heat exchangers for district heating
Enter oxygen-eliminating device；The low add-back hot systems, i.e. the hydrophobic of #5, #6, #7, #8 low-pressure heater are flow automatically step by step, finally import heat
Well；The heat supply network return water is sent to heat user after heat exchangers for district heating heats.
The first control valve control is entered the flow of steam extraction injector, the second control valve by Steam Turbine Through IP Admission steam discharge
Control is entered the flow of steam extraction injector by seven grades of extraction opening steam of turbine low pressure cylinder.
The steam extraction injector is that driving vapour source is drawn the lower steam turbine of temperature, pressure with Steam Turbine Through IP Admission steam discharge
The steam of seven grades of steam extractions of low pressure (LP) cylinder, two strands of steam enter in heat exchangers for district heating after being sufficiently mixed and boost in steam extraction injector and add
Hot hot net water.
The unit adjusts by adjusting the aperture of the first control valve and the second control valve in heat supply period and enters steam extraction
The intermediate pressure cylinder displacement of injector and the flow of seven grades of steam extractions of low pressure (LP) cylinder can flexibly control steam extraction injector outlet vapor ginseng
Number, to meet heat demand.
The utility model has the following advantages that and the utility model has the advantages that in unit heat supply period, using steam extraction injector from low pressure
It is drawn the lower steam of a part of temperature, pressure in cylinder extraction line, takes full advantage of the heat of the lower steam of grade in low pressure (LP) cylinder
Amount, reduces the steam extraction amount of high-grade intermediate pressure cylinder steam discharge while ensuring heat demand；Simultaneously by mixed steam with
The temperature difference of hot net water reduces, and temperature more matches, and reduces heater damage, improves the thermal efficiency of unit, make the energy of power plant
Consumption is minimized.
Detailed description of the invention
Fig. 1 is a kind of efficient heating system of cogeneration units being drawn based on steam
In figure: 1- boiler；2- steam turbine high-pressure cylinder；3-Steam Turbine Through IP Admissions；4-turbine low pressure cylinders；5-generators；6–
Condensate pump；7-hot wells；8-condensers；9-steam extraction injectors；10-heat exchangers for district heatings；11-the first control valves；12-the second controls
Valve；13- oxygen-eliminating device；14- feed pump.
Specific embodiment
The utility model provides a kind of efficient heating system of the cogeneration units being drawn based on steam, below with reference to attached
Figure and specific embodiment are described further this system working principle.
Fig. 1 is a kind of efficient heating system schematic diagram of cogeneration units being drawn based on steam
A kind of efficient heating system of cogeneration units being drawn based on steam, which is characterized in that the system mainly includes
Boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, high add-back hot systems 15, low add-back hot systems 5,
Steam extraction injector 9 and heat exchangers for district heating 10；Steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4 and the hair
Motor 5 is contacted, and 4 steam exhaust outlet of turbine low pressure cylinder is connected with 8 entrance of condenser, and the steam exhaust condensed in condenser 8 imports heat
Low add-back hot systems, oxygen-eliminating device 13, feed pump 14 and high add-back hot systems are sequentially entered through the boosting of condensate pump 6 after well 7, finally
Return to boiler 1；3 steam discharge of Steam Turbine Through IP Admission is divided into two strands, one enters #5 low-pressure heater, one passes through the first control
Valve 11 processed enters 9 entrance of steam extraction injector as driving vapour source；Seven grades of steam extractions of the turbine low pressure cylinder 4 are divided into two strands,
One enters #7 low-pressure heater, one is connected by the second control valve 12 with 9 entrance of steam extraction injector；The steam extraction injection
9 entrance of device passes through pipeline and the first control valve 11 respectively and the second control valve 12 is low with 3 steam discharge of Steam Turbine Through IP Admission and steam turbine
4 seven grades of steam extractions of cylinder pressure are connected, and outlet is connected with 10 entrance of heat exchangers for district heating；The high add-back hot systems, #1, #2, #3 high
Pressure the hydrophobic of heater is flow automatically step by step, finally imports oxygen-eliminating device 13 together with the hydrophobic of heat exchangers for district heating 10；The low add-back
Hot systems, i.e. the hydrophobic of #5, #6, #7, #8 low-pressure heater flow automatically step by step, finally import hot well 7；The heat supply network return water is through warm
Net heater 10 is sent to heat user after heating.
First control valve 11 control is entered the flow of steam extraction injector 9, the second control by 3 steam discharge of Steam Turbine Through IP Admission
Valve 12 processed controls the flow for entering steam extraction injector 9 by 4 seven grades of extraction opening steam of turbine low pressure cylinder.
The steam extraction injector 9 is that driving vapour source is drawn the lower steamer of temperature, pressure with 3 steam discharge of Steam Turbine Through IP Admission
The steam of 4 seven grades of steam extractions of machine low pressure (LP) cylinder, two strands of steam enter heat exchangers for district heating after being sufficiently mixed and boost in steam extraction injector 9
Hot net water is heated in 10.
The unit adjusts and enters by adjusting the aperture of the first control valve 11 and the second control valve 12 in heat supply period
3 displacement of intermediate pressure cylinder of steam extraction injector 9 and the flow of 4 seven grades of steam extractions of low pressure (LP) cylinder can flexibly control the outlet of steam extraction injector 9
Steam parameter, to meet heat demand.
Its course of work are as follows: in unit heat supply period, open the first control valve 11,3 steam discharge of Steam Turbine Through IP Admission enters steam extraction
Injector 9 opens the second control valve 12 as driving vapour source, and 4 seven grades of steam extractions of turbine low pressure cylinder enter the work of steam extraction injector 9
To be jetting steam caused, wherein passing through the low-pressure steam flow of 9 injection of steam extraction injector by the flow and steam extraction injection of driving steam
The characteristic of device 9 determines that two strands of steam enter heat exchangers for district heating 10 after mixing in steam extraction injector 9 and heat hot net water, after heating
Hot net water be sent to heat user.Change aperture control steam extraction injector 9 outlet for adjusting the first control valve 11 according to heating demand
Steam flow and parameter, to meet heat demand.
Above embodiment is not limitations of the present invention, and those skilled in the art are in the utility model
Technical proposal scope in the variations, modifications, additions or substitutions made, also belong to the protection scope of the utility model.
Claims (4)
1. a kind of efficient heating system of cogeneration units being drawn based on steam, which is characterized in that the system mainly includes pot
Furnace (1), steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4), high add-back hot systems, low add-back heat system
System, steam extraction injector (9) and heat exchangers for district heating (10)；The steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), steam turbine
Low pressure (LP) cylinder (4) and generator (5) are contacted, and turbine low pressure cylinder (4) steam exhaust outlet is connected with condenser (8) entrance, in condenser
(8) in condense steam exhaust import hot well (7) by condensate pump (6) boosting sequentially enter low add-back hot systems, oxygen-eliminating device (13),
Feed pump (14) and high add-back hot systems, are eventually returned to boiler (1)；Described Steam Turbine Through IP Admission (3) steam discharge is divided into two strands, and one
Stock enters #5 low-pressure heater, one enters steam extraction injector (9) entrance as driving vapour source by the first control valve (11)；Institute
Seven grades of steam extractions of the turbine low pressure cylinder (4) stated are divided into two strands, one enters #7 low-pressure heater, one passes through the second control valve
(12) it is connected with steam extraction injector (9) entrance；Described steam extraction injector (9) entrance passes through pipeline and the first control valve respectively
(11) it is connected with the second control valve (12) with (4) the seven grades of steam extractions of Steam Turbine Through IP Admission (3) steam discharge and turbine low pressure cylinder, exports
It is connected with heat exchangers for district heating (10) entrance；The high add-back hot systems, the hydrophobic of #1, #2, #3 high-pressure heater are flow automatically step by step,
Finally oxygen-eliminating device (13) are imported together with the hydrophobic of heat exchangers for district heating (10)；The low add-back hot systems, i.e. #5, #6, #7, #8
The hydrophobic of low-pressure heater is flow automatically step by step, finally imports hot well (7)；The heat supply network return water is after heat exchangers for district heating (10) are heated
It is sent to heat user.
2. a kind of efficient heating system of cogeneration units being drawn based on steam according to claim 1, feature are existed
Enter the flow of steam extraction injector (9) by Steam Turbine Through IP Admission (3) steam discharge in, described first control valve (11) control, second
Control valve (12) controls the flow for entering steam extraction injector (9) by (4) seven grades of extraction opening steam of turbine low pressure cylinder.
3. a kind of efficient heating system of cogeneration units being drawn based on steam according to claim 1, feature are existed
In the steam extraction injector (9) is that driving vapour source is drawn the lower steamer of temperature, pressure with Steam Turbine Through IP Admission (3) steam discharge
The steam of (4) seven grades of steam extractions of machine low pressure (LP) cylinder, two strands of steam add after being sufficiently mixed and boost in steam extraction injector (9) into heat supply network
Hot net water is heated in hot device (10).
4. a kind of efficient heating system of cogeneration units being drawn based on steam according to claim 1, feature are existed
In the unit is in heat supply period, by adjusting the aperture of the first control valve (11) and the second control valve (12), adjusts to enter and take out
Intermediate pressure cylinder (3) displacement of vapour injector (9) and the flow of (4) seven grades of steam extractions of turbine low pressure cylinder, can flexibly control steam extraction
Injector (9) outlet vapor parameter, to meet heat demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820120278.6U CN208186473U (en) | 2018-01-24 | 2018-01-24 | A kind of efficient heating system of cogeneration units being drawn based on steam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820120278.6U CN208186473U (en) | 2018-01-24 | 2018-01-24 | A kind of efficient heating system of cogeneration units being drawn based on steam |
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| CN208186473U true CN208186473U (en) | 2018-12-04 |
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| CN201820120278.6U Expired - Fee Related CN208186473U (en) | 2018-01-24 | 2018-01-24 | A kind of efficient heating system of cogeneration units being drawn based on steam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520203A (en) * | 2020-04-09 | 2020-08-11 | 华电电力科学研究院有限公司 | Steam turbine body and heat recovery system integrated comprehensive efficiency improving system and method under steam parameter improving condition |
| CN113654025A (en) * | 2021-08-19 | 2021-11-16 | 西安热工研究院有限公司 | Industrial steam supply system combining electric boiler and steam extraction heating |
| CN114110736A (en) * | 2021-11-25 | 2022-03-01 | 广西电网有限责任公司电力科学研究院 | Non-contact heat exchange steam supply method for extracting steam at different steam temperatures |
| CN114718677A (en) * | 2022-04-21 | 2022-07-08 | 苏州西热节能环保技术有限公司 | Deep peak regulation thermoelectric decoupling system of heat and gas supply unit |
| CN114754399A (en) * | 2022-03-11 | 2022-07-15 | 华电电力科学研究院有限公司 | Cogeneration system and method for secondary heating industrial heat supply network |
-
2018
- 2018-01-24 CN CN201820120278.6U patent/CN208186473U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520203A (en) * | 2020-04-09 | 2020-08-11 | 华电电力科学研究院有限公司 | Steam turbine body and heat recovery system integrated comprehensive efficiency improving system and method under steam parameter improving condition |
| CN113654025A (en) * | 2021-08-19 | 2021-11-16 | 西安热工研究院有限公司 | Industrial steam supply system combining electric boiler and steam extraction heating |
| CN114110736A (en) * | 2021-11-25 | 2022-03-01 | 广西电网有限责任公司电力科学研究院 | Non-contact heat exchange steam supply method for extracting steam at different steam temperatures |
| CN114754399A (en) * | 2022-03-11 | 2022-07-15 | 华电电力科学研究院有限公司 | Cogeneration system and method for secondary heating industrial heat supply network |
| CN114754399B (en) * | 2022-03-11 | 2023-08-25 | 华电电力科学研究院有限公司 | Combined heat and power generation system and method for secondary heating industrial heat supply network |
| CN114718677A (en) * | 2022-04-21 | 2022-07-08 | 苏州西热节能环保技术有限公司 | Deep peak regulation thermoelectric decoupling system of heat and gas supply unit |
| CN114718677B (en) * | 2022-04-21 | 2024-04-05 | 苏州西热节能环保技术有限公司 | Deep peak shaving thermal decoupling system of heat and gas supply unit |
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