CN206205944U - A kind of thermoelectricity decoupled system for improving hotspot stress - Google Patents
A kind of thermoelectricity decoupled system for improving hotspot stress Download PDFInfo
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- CN206205944U CN206205944U CN201621298348.4U CN201621298348U CN206205944U CN 206205944 U CN206205944 U CN 206205944U CN 201621298348 U CN201621298348 U CN 201621298348U CN 206205944 U CN206205944 U CN 206205944U
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- 230000005619 thermoelectricity Effects 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000007701 flash-distillation Methods 0.000 claims abstract description 7
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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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 thermoelectricity decoupled system for improving hotspot stress,The system includes boiler,High pressure cylinder,Low pressure (LP) cylinder,Injector,Flash tank,Air-Cooling Island,Condenser,First condensate pump,Heat exchangers for district heating,Second condensate pump and pumps for hot water supply net,Boiler is connected with high pressure cylinder,High pressure cylinder is connected with low pressure (LP) cylinder,The heated inlet of heat exchangers for district heating is connected on the pipeline between high pressure cylinder and low pressure (LP) cylinder,Main steam line connection between the injection entrance and boiler and high pressure cylinder of injector,Exhaust steam outlet of the volume suction inlet of injector respectively with the flash distillation circulation steam outlet and/or Air-Cooling Island of flash tank is connected,The mixed vapour outlet of injector is connected with the heated inlet of condenser,The import heat supply network water return pipeline connection of pumps for hot water supply net,The outlet of pumps for hot water supply net is connected with the backwater entrance of condenser,The backwater outlet of condenser is connected with the backwater entrance of heat exchangers for district heating,The hot water outlet of heat exchangers for district heating is connected with heat supply network water supply line.
Description
Technical field
The utility model is related to power industry thermoelectricity unit technical field of comprehensive utilization, and in particular to one kind improves hotspot stress
Thermoelectricity decoupled system, can be used to reclaim electric power plant circulating water and exhaust steam residual heat more specifically to one kind, improve power plant thermoelectricity
Than the system with thermoelectricity unit flexibility.
Background technology
At present, China's power industry is based on Coal-fired Thermal Power, and coal fired thermal power plant is based on condensing-type turbine generator, this
The heat utilization rate in class thermal power plant is relatively low, and more than 50% heat is carried by recirculated cooling water, is dispersed into by cooling tower
In air.Because recirculated cooling water belongs to low-grade heat source, using conventional meanses it is recycled it is less efficient.It is long-term with
Come, the recycling to this portion of energy does not cause enough attention.In addition, northern China is mainly concentrated using steam power plant
Heating, and current steam power plant when running about 20%~40% heat be discharged into air by exhaust steam in steam turbine waste heat.By
This, not only causes substantial amounts of energy dissipation, and exacerbate environmental pollution.Cogeneration of heat and power central heating enterprise exists again simultaneously
Problems with：One be urbanization process quickening, concentrated supply of heating in the city heat source insufficiency, hotspot stress is relatively low；Another is to generate electricity
Depth peak regulation cannot be carried out with heat supply, unit operation flexibility is relatively low.Therefore using advanced technological means to this portion of energy
Recycled, the flexibility for improving thermoelectricity unit operation is very important.
The content of the invention
The purpose of this utility model is the thermoelectricity decoupled system for providing a kind of simple and reasonable improved hotspot stress,
The system to be drawn gas and reclaim the waste heat of electric power plant circulating water or exhaust steam for heat supply come injection by extracting main steam or high pressure cylinder, is reduced
Steam turbine power generation amount, improves the hotspot stress of system, realizes that energy-saving and thermoelectricity decouples operation, lifts fired power generating unit flexibility,
Effectively improve the peak modulation capacity during system heat supply.
To achieve the above object, the thermoelectricity decoupled system for improving hotspot stress described in the utility model includes boiler, middle height
Cylinder pressure, low pressure (LP) cylinder, injector, flash tank, Air-Cooling Island, condenser, the first condensate pump, heat exchangers for district heating, the second condensate pump
And pumps for hot water supply net, described boiler is connected with high pressure cylinder, and high pressure cylinder is connected with low pressure (LP) cylinder, and the heating of heat exchangers for district heating enters
Mouth is connected on the pipeline between high pressure cylinder and low pressure (LP) cylinder, the master between the injection entrance and boiler and high pressure cylinder of injector
Jet chimney is connected, and the volume suction inlet of injector circulates the weary of steam outlet and/or Air-Cooling Island with the flash distillation of flash tank respectively
Vapor outlet is connected, and the outlet of the mixed vapour of injector is connected with the heated inlet of condenser, the import of pumps for hot water supply net and heat supply network
Water return pipeline is connected, and the outlet of pumps for hot water supply net is connected with the backwater entrance of condenser, and the backwater outlet of condenser adds with heat supply network
The backwater entrance connection of hot device, the hot water outlet of heat exchangers for district heating is connected with heat supply network water supply line.
Preferably, the injection entrance of the injector is also connected with the high pressure cylinder of high pressure cylinder.
The utility model has the following advantages that：It is described in the utility model improve hotspot stress thermoelectricity decoupled system with it is existing
Technology is compared, and to be drawn gas and reclaim the waste heat of electric power plant circulating water or exhaust steam for heat supply come injection by extracting main steam or high pressure cylinder,
Steam turbine power generation amount is reduced, the hotspot stress of system is improve, energy-saving and thermoelectricity is realized and is decoupled operation, improve thermoelectricity
Unit flexibility, is effectively improved the peak modulation capacity during system heat supply.Meet national energy-saving emission reduction policy, with fine society
Can benefit, environmental benefit and preferable economic benefit.
Brief description of the drawings
Fig. 1 is the structural representation of the thermoelectricity decoupled system of raising hotspot stress described in the utility model.
Specific embodiment
Following examples are used to illustrate the utility model, but are not limited to scope of the present utility model.
As shown in figure 1, the thermoelectricity decoupled system for improving hotspot stress described in the utility model includes boiler 1, high pressure cylinder
2nd, low pressure (LP) cylinder 3, injector 4, flash tank 5, Air-Cooling Island 6, condenser 7, the first condensate pump 8, heat exchangers for district heating 9, second condense
Water pump 10 and pumps for hot water supply net 11, described boiler 1 are connected with high pressure cylinder 2, and high pressure cylinder 2 is connected with low pressure (LP) cylinder 3, boiler 1
The high-temperature steam of discharge enters high pressure cylinder 2 and low pressure (LP) cylinder 3 does work, and the exhaust steam after acting is discharged by the outlet of low pressure (LP) cylinder 3；Heat
The heated inlet of net heater 9 is connected on the pipeline between high pressure cylinder 2 and low pressure (LP) cylinder 3, is taken out by the intermediate pressure cylinder of high pressure cylinder 2
The intermediate pressure cylinder for taking to draw gas and enter heat exchangers for district heating 9 by the heated inlet of heat exchangers for district heating 9, after heat release in heat exchangers for district heating 9
The solidifying water for being formed is entered the second condensate pump 10 and is discharged by the second condensate pump 10 by the solidifying water out of heat exchangers for district heating；Injection
The injection entrance of device 4 and the main steam line between boiler 1 and high pressure cylinder 2 are connected, and the high temperature extracted by main steam line steams
Vapour enters working fluid of the injector 4 as injector 4, the volume suction inlet difference of injector 4 by the injection entrance of injector 4
Exhaust steam outlet with the flash distillation circulation steam outlet and/or Air-Cooling Island 6 of flash tank 5 is connected, the sudden strain of a muscle after the flash distillation of flash tank 5
The exhaust steam for steaming circulation water vapour and/or Air-Cooling Island 6 is rolled up and is drawn onto in injector 4 as the driving fluid of injector 4, working fluid
With driving fluid momentum and mass exchange are carried out in injector 4；The mixed vapour outlet of injector 4 and the heating of condenser 7
Entrance is connected, mixed vapour the adding by condenser 7 that working fluid and driving fluid become by pressure rise after injector 4
Hot entrance enters in condenser 7, and the solidifying water formed after heat release in condenser 7 enters first by the solidifying water out of condenser 7
Condensate pump 8 is simultaneously discharged by the first condensate pump 8；The import heat supply network water return pipeline connection of pumps for hot water supply net 11, pumps for hot water supply net
11 outlet is connected with the backwater entrance of condenser 7, and the backwater outlet of condenser 7 is connected with the backwater entrance of heat exchangers for district heating 9,
The hot water outlet of heat exchangers for district heating 9 is connected with heat supply network water supply line；Heat supply network backwater enters condenser 7 simultaneously by pumps for hot water supply net 11
Once exchanged heat with mixed vapour in condenser 7, the heat supply network backwater after heat exchange enters heat exchangers for district heating 9 and in heat supply network heating
Drawn gas with intermediate pressure cylinder in device 9 and exchange heat again, heat supply network backwater sequentially passes through condenser 7 and heat exchangers for district heating 9 is heated twice, temperature liter
Confessed by heat supply network water supply line after to heat supply temperature.
Preferably, high pressure cylinder of the injection entrance of injector 4 also with high pressure cylinder 2 is connected, by the high pressure cylinder of high pressure cylinder 2
The high-temperature steam (high pressure cylinder draws gas) of extraction enters workflow of the injector 4 as injector 4 by the injection entrance of injector 4
Body.
The thermoelectricity decoupled system for improving hotspot stress described in the utility model extracts one from main steam line or high pressure cylinder
Part high-temperature steam enters injector, as the working fluid of injector, under the turbulent diffusion of jet, and can Juan Xi power plant
Exhaust steam enters injector by the circulation water vapour after flash distillation, and the relatively low fluid of the pressure that this part is inhaled into is flow type pump with injection
Body.Working fluid and driving fluid carry out momentum and mass exchange in injector, and pressure is because of the drop of flow velocity in flow process
It is low and raise.By pressure rise after injector mixed vapour into being exchanged heat with heat supply network backwater in condenser, by changing
The mixed vapour of heat flows out after condensing into water.Intermediate pressure cylinder draws gas and once exchanged heat again with hot net water by heat exchangers for district heating, takes out
Vapour is flowed out after heat exchange condenses into water, and hot net water is heated twice by condenser and heat exchangers for district heating, and temperature rises to heat supply temperature
Confessed after degree.The system is drawn gas and be used for come the waste heat of injection recovery electric power plant circulating water or exhaust steam by extracting main steam or high pressure cylinder
Heat supply, reduces steam turbine power generation amount, improves the hotspot stress of system, realizes that energy-saving and thermoelectricity decouples operation, improves
The flexibility of fired power generating unit, is effectively improved the peak modulation capacity during system heat supply.
1 describe the workflow of the thermoelectricity decoupled system for improving hotspot stress described in the utility model in detail below in conjunction with the accompanying drawings
Journey.
As shown in figure 1, from the main steam line out of boiler 1 or the high pressure cylinder of high pressure cylinder 2 extracts a part of high temperature
Steam enters injector 4, as the working fluid of injector 4, under the turbulent diffusion of jet, and can the process sudden strain of a muscle of Juan Xi power plant
The exhaust steam of circulation water vapour or Air-Cooling Island 6 after the flash distillation of steaming pot 5 enters injector 4, and the relatively low fluid of the pressure being inhaled into is to draw
Jet body, working fluid and driving fluid carry out momentum and mass exchange in injector 4.By pressure rise after injector 4
Mixed vapour into being exchanged heat with heat supply network backwater in condenser 7, the mixed vapour after heat exchange condenses into water, coagulates water by the
Flowed out after one condensate pump 8.Drawn gas on intermediate pressure cylinder before low pressure (LP) cylinder 3, once changed by heat exchangers for district heating 9 and hot net water
Heat, the steam condensation Cheng Shui after heat exchange coagulates water by being flowed out after the second condensate pump 10.Heat supply network backwater is by pumps for hot water supply net
After 11, sequentially pass through condenser 7 and heat exchangers for district heating 9 is heated twice, temperature is confessed after rising to heat supply temperature.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is to those skilled in the art apparent
's.Therefore, the these modifications or improvements on the basis of without departing from the utility model spirit, belonging to the utility model will
Seek the scope of protection.
Claims (2)
1. it is a kind of improve hotspot stress thermoelectricity decoupled system, it is characterised in that the thermoelectricity decoupled system bag of the raising hotspot stress
Include boiler, high pressure cylinder, low pressure (LP) cylinder, injector, flash tank, Air-Cooling Island, condenser, the first condensate pump, heat exchangers for district heating,
Two condensate pumps and pumps for hot water supply net, described boiler are connected with high pressure cylinder, and high pressure cylinder is connected with low pressure (LP) cylinder, heat supply network heating
The heated inlet of device is connected on the pipeline between high pressure cylinder and low pressure (LP) cylinder, injection entrance and boiler and the mesohigh of injector
Main steam line connection between cylinder, the volume suction inlet of injector circulated with the flash distillation of flash tank respectively steam outlet and/or
The exhaust steam outlet connection of Air-Cooling Island, the mixed vapour outlet of injector is connected with the heated inlet of condenser, pumps for hot water supply net
Import is connected with heat supply network water return pipeline, and the outlet of pumps for hot water supply net is connected with the backwater entrance of condenser, and the backwater of condenser goes out
Mouth is connected with the backwater entrance of heat exchangers for district heating, and the hot water outlet of heat exchangers for district heating is connected with heat supply network water supply line.
2. the thermoelectricity decoupled system of hotspot stress is improved as claimed in claim 1, it is characterised in that the injection of the injector enters
Mouth is also connected with the high pressure cylinder of high pressure cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298348.4U CN206205944U (en) | 2016-11-28 | 2016-11-28 | A kind of thermoelectricity decoupled system for improving hotspot stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621298348.4U CN206205944U (en) | 2016-11-28 | 2016-11-28 | A kind of thermoelectricity decoupled system for improving hotspot stress |
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| Publication Number | Publication Date |
|---|---|
| CN206205944U true CN206205944U (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621298348.4U Active CN206205944U (en) | 2016-11-28 | 2016-11-28 | A kind of thermoelectricity decoupled system for improving hotspot stress |
Country Status (1)
| Country | Link |
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| CN (1) | CN206205944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
-
2016
- 2016-11-28 CN CN201621298348.4U patent/CN206205944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
| CN111206970B (en) * | 2018-11-21 | 2024-03-01 | 赫普科技发展（北京）有限公司 | Peak regulating system utilizing steam jet and steam extractor in thermal power plant and control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 100043, Beijing, Financial Street (Changan) center, building 1, 13, Shijingshan District Patentee after: CES ENERGY TECHNOLOGY Co.,Ltd. Address before: 100016 Beijing 1 Jiuxianqiao Chaoyang District ten neighborhood hospital Patentee before: CES ENERGY TECHNOLOGY Co.,Ltd. |
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| CP02 | Change in the address of a patent holder | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20231121 Granted publication date: 20170531 |
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| PP01 | Preservation of patent right |