CN208253694U - A kind of waste heat recycling system reducing heat supply network return water temperature - Google Patents
A kind of waste heat recycling system reducing heat supply network return water temperature Download PDFInfo
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- CN208253694U CN208253694U CN201820249405.2U CN201820249405U CN208253694U CN 208253694 U CN208253694 U CN 208253694U CN 201820249405 U CN201820249405 U CN 201820249405U CN 208253694 U CN208253694 U CN 208253694U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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Abstract
The utility model discloses the waste heat recycling systems that one kind can reduce heat supply network return water temperature, including boiler, steam turbine, condenser, cooling tower, the first absorption heat pump, the second absorption heat pump and heat-exchange device；Boiler is connect with steam turbine, and steam turbine is connect by steam exhaust outlet with condenser, and the well connection of condenser and cooling tower, condenser also passes through the first absorption heat pump and the well of cooling tower connects；Steam turbine is connect with the first absorption heat pump, the second absorption heat pump and heat-exchange device respectively by steam extraction outlet；Heat supply network backwater outlet is connect by the first water return pipeline with the second absorption heat pump, and the second absorption heat pump is connect by the first absorption heat pump with heat-exchange device.The utility model is using heat supply network return water as the low-temperature heat source of the second absorption heat pump, to reduce heat supply network return water temperature, recycles the steam exhaust of more thermal power plant units or the waste heat of recirculated water, improves unit energy utilization rate.
Description
Technical field
The utility model relates to residual heat of electric power plant recycling fields, and in particular to one kind can reduce the remaining of heat supply network return water temperature
Recuperation of heat utilizes system.
Background technique
In " 13 " planning, National Energy Board advocates energetically uses central heating form in northern heating season, and hot
Electricity Federation production is the principal mode of current central heating, and cogeneration of heat and power is far below region boiler and all kinds of dispersions because of unit heating coal consumption
Ways of heating is the highest heat resource form of energy conversion efficiency generally acknowledged at present.Currently, there are three types of sides for the heat-supplying mode of power plant
Formula, one is directlying adopt the mode of heat exchangers for district heating heating heat supply network recirculated water, this mode is arranged using in Steam Turbine Through IP Admission
Steam extraction directly heats heat supply network recirculated water by hot water heat exchanger at vapour, has heat supply temperature relatively high and the big spy of heating area
Point still causes the condensation heat loss and the heat exchange loss of the big temperature difference of steam drainage in this way.The second is using high back pressure
Heat-supplying mode, this mode are to remove turbine low pressure cylinder exhaust stage blade, improve exhaust steam pressure and temperature, pass through condensing using steam discharge
Device directly heats heat supply network recirculated water, and the applicable heat supply network return water temperature of this mode is relatively low and supply water temperature is not high.The third is using heat
Waste heat for supplying mode is received in blowback, this mode is that the waste heat of recycling condensation recirculated water or steam exhaust directly heats heat supply network recirculated water,
This mode is also applied for that heat supply network return water temperature is relatively low and supply water temperature is not high, but also results in the condensation heat waste of steam drainage
It loses.
No matter which kind of above-mentioned heat-supplying mode, all there is a problem of at present one it is universal, i.e. heat supply network return water temperature is relatively high,
The steam exhaust of thermal power plant unit or circulating water afterheat cannot be recycled sufficiently, cause waste heat loss, cause the energy utilization rate of unit low.
Utility model content
Aiming at the problems existing in the prior art, the purpose of this utility model is to provide one kind can reduce heat supply network return water temperature
The waste heat recycling system of degree is used for power plant's heating system, using most of heat supply network return water as the Low Temperature Thermal of absorption heat pump
Source can recycle the steam exhaust of more thermal power plant units or the waste heat of recirculated water to reduce heat supply network return water temperature, improve the unit energy
Utilization rate.
In order to achieve the above object, the utility model is achieved using following technical scheme.
A kind of waste heat recycling system reducing heat supply network return water temperature, including boiler, steam turbine, condenser, cooling
Tower, the first absorption heat pump, the second absorption heat pump and heat-exchange device；The steam (vapor) outlet of the boiler and the steam turbine
The steam exhaust outlet of steam inlet connection, the steam turbine is connect with the steam inlet of the condenser, the circulation of the condenser
Water inlet is connect with the well of the cooling tower, the evaporation of the circulating water outlet of the condenser and first absorption heat pump
The connection of device entrance, the evaporator outlet of first absorption heat pump are connect with the well of the cooling tower；
The steam extraction outlet of the steam turbine is connect with the generator inlet of first absorption heat pump；The steam turbine
Steam extraction outlet is also connect with the generator inlet of second absorption heat pump；The steam extraction outlet of the steam turbine is gone back and heat exchange
The steam inlet of device connects；
The outlet of heat supply network return water is connect by the first water return pipeline with the evaporator inlet of second absorption heat pump, institute
The evaporator outlet for stating the second absorption heat pump is connect with the absorber entrance of first absorption heat pump, and described first absorbs
The condensator outlet of formula heat pump is connect with the water inlet of the heat-exchange device, and the water outlet of the heat-exchange device passes through heat supply
Pipeline is connect with the entrance that heat supply network supplies water.
The characteristics of the utility model and further improvement lies in that:
The outlet of heat supply network return water is connect by the second water return pipeline with the absorber entrance of second absorption heat pump, institute
The condensator outlet for stating the second absorption heat pump is connect with the water inlet of the heat-exchange device, the water outlet of the heat-exchange device
Mouth is connect by heat supply pipeline with the entrance that heat supply network supplies water.
The heat-exchange device is peak load calorifier.
The generator exports of first absorption heat pump are connect with condenser hotwell.
The generator exports of second absorption heat pump are connect with condenser hotwell.
The steam (vapor) outlet of the heat-exchange device is connect with condenser hotwell.
Circulating pump is connected between circulation water inlet and the well of the cooling tower of the condenser.
Recirculated water water return pipeline, institute are additionally provided between the circulating water outlet of the condenser and the well of the cooling tower
It states and is provided with valve on recirculated water water return pipeline.
Compared with prior art, the utility model has the following beneficial effects:
The waste heat recycling system for reducing heat supply network return water temperature of the utility model is based on the waste heat of absorption heat pump
Recovery technology, using the steam in steam turbine as the high temperature driven heat source of the first absorption heat pump and the second absorption heat pump,
Start the first absorption heat pump and the running of the second absorption heat pump, and using heat supply network return water as the Low Temperature Thermal of the second absorption heat pump
The steam exhaust of more thermal power plant units or the waste heat of recirculated water are recycled to reduce heat supply network return water temperature in source, further heat heat supply network and follow
Ring water supplies user, improves unit energy utilization rate, reduces the use cost of user.
Detailed description of the invention
The utility model is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is the structural representation that one kind of the utility model can reduce the waste heat recycling system of heat supply network return water temperature
Figure.
In figure: 1 boiler；2 steam turbines；3 condensers；4 cooling towers；5 first absorption heat pumps；6 second absorption heat pumps；7
Peak load calorifier；8 wells；9 circulating pumps；10 condenser hotwells；11 first water return pipelines；12 second water return pipelines；13 heating tubes
Road；14 steam exhaust outlet；15 steam extractions outlet；A heat supply network return water；B heat supply network supplies water.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with embodiment, but those skilled in the art
Member will be understood that the following example is merely to illustrate the utility model, and be not construed as limitation the scope of the utility model.
As shown in Figure 1, the utility model provides a kind of waste heat recycling system that can reduce heat supply network return water temperature, use
In power plant's heat supply, including boiler 1, steam turbine 2, condenser 3, cooling tower 4, the first absorption heat pump 5, the second absorption heat pump 6
And heat-exchange device.
Wherein, the connection relationship that can be reduced in the waste heat recycling system of heat supply network return water temperature is specific as follows:
The steam (vapor) outlet of the boiler 1 is connect by high temperature and high pressure steam pipeline with the steam inlet of the steam turbine 2, institute
The steam exhaust outlet 14 for stating steam turbine 2 is connect with the steam inlet of the condenser 3, the circulation water inlet of the condenser 3 and institute
The well 8 for stating cooling tower 4 connects, the evaporator inlet of the circulating water outlet of the condenser 3 and first absorption heat pump 5
Connection, the evaporator outlet of first absorption heat pump 5 are connect with the well 8 of the cooling tower 4.
The steam extraction outlet 15 of the steam turbine 2 is connect with the generator inlet of first absorption heat pump 5；The steamer
The steam extraction outlet 15 of machine 2 is also connect with the generator inlet of second absorption heat pump 6；The steam extraction of the steam turbine 2 exports
15 also connect with the steam inlet of heat-exchange device；
The outlet of heat supply network return water A is connected by the evaporator inlet of the first water return pipeline 11 and second absorption heat pump 6
It connects, the evaporator outlet of second absorption heat pump 6 is connect with the absorber entrance of first absorption heat pump 5, described
The condensator outlet of first absorption heat pump 5 is connect with the water inlet of the heat-exchange device, the water outlet of the heat-exchange device
Mouth is connect by heat supply pipeline 13 with the entrance of heat supply network water supply B.
The generator exports of first absorption heat pump 5 are connect with condenser hotwell 10；Second absorption heat pump
Generator exports connect with condenser hotwell 10；The steam (vapor) outlet of the heat-exchange device is connect with condenser hotwell 10.
The operation logic of the waste heat recycling system for reducing heat supply network return water temperature of the utility model is as follows:
A part of steam in steam turbine 2 is passed through in condenser 3 by 14 discharge of steam exhaust outlet by exhaust pipe, will
Recirculated water in the well 8 of cooling tower 4 is passed through in condenser 3, the steam in circulating water condenser 3, make steam condensation at
Water enables high steam to flow in 2 cylinder body of steam turbine to form pressure difference in inlet end and exhaust end in steam turbine 2,
Blade is blown, so that steam turbine 2 rotates；Recirculated water after cooling steam absorbs the heat of steam, and by the first absorption type heat
The evaporator inlet of pump 5 is passed through in the first absorption heat pump 5, as the low-temperature heat source of the first absorption heat pump 5, is passed through again later
The evaporator outlet of first absorption heat pump 5 is flowed in the well 8 of cooling tower 4 by circulating water pipeline, is formed water circulation, is continued
Steam in condenser 3 is cooled down.
Another part steam in steam turbine 2 is divided into three strands, wherein one is steamed by 15 discharge of steam extraction outlet of steam turbine 2
Vapour is passed through in the pipeline of the high-low pressure generator of the first absorption heat pump 5 by pipeline, the high temperature as the first absorption heat pump 5
Driving heat source drives the first absorption heat pump 5 to operate using high temperature and high pressure steam, and the first absorption heat pump 5 absorbs the heat of steam
Amount, and the heat supply network return water A being passed through in the first absorption heat pump 5 is heated, pass through the first absorption heat pump 5 after heat exchange
High-low pressure generator pipeline, steam drainage is discharged by generator exports；Another strand of steam is passed through the second absorption by pipeline
In the pipeline of the high-low pressure generator of formula heat pump 6, as the high temperature driven heat source of the second absorption heat pump 6, high temperature and pressure is utilized
The second absorption heat pump of steam drive 6 operates, and the second absorption heat pump 6 absorbs the heat of steam, and absorption to being passed through second
Heat supply network recirculated water in heat pump 6 is heated, and passes through the pipe of the high-low pressure generator of the second absorption heat pump 6 after heat exchange
Steam drainage is discharged by generator exports in road；Third stock steam is passed directly into heat-exchange device by pipeline, utilizes steam pair
The heat supply network recirculated water being passed through in heat-exchange device further heats, and is discharged and is steamed by the steam (vapor) outlet of heat-exchange device after heat exchange
Vapour is hydrophobic；The steam drainage that this three strands of steam are discharged after heat exchanges respectively merges, and drains into condenser hotwell 10, receives
Collect condensed water.
It is two strands that heat supply network return water A, which is divided to, and wherein one heat supply network return water is passed through the second absorption type heat by the first water return pipeline 11
In the evaporator pipeline of pump 6, as the low-temperature heat source of the second absorption heat pump 6, heat is exchanged in the second absorption heat pump 6
Afterwards, temperature reduces, then is passed into the first absorption heat pump 5, recycles the steam exhaust of more thermal power plant units or the waste heat of recirculated water,
To further heat heat supply network recirculated water, unit energy utilization rate is improved；Another gang of heat supply network return water A passes through the second water return pipeline 12
It is passed through in the second absorption heat pump 6, the waste-heat heat supply network recirculated water recycled using the second absorption heat pump 6；Finally by heat
Switch further heats heat supply network recirculated water, supplies user, reduces the use cost of user.
In the waste heat recycling system for reducing heat supply network return water temperature of the utility model, heat-exchange device adds for spike
Hot device 7 can satisfy the demand of cold season thermic load, guarantee heating quality.Heat-exchange device is also possible to other and adds substantially
Hot device can meet base heating load demand.
Further, in the waste heat recycling system for reducing heat supply network return water temperature of the utility model, the condensing
It is connected between the circulation water inlet of device 3 and the well 8 of the cooling tower 4 by circulating pump 9, circulating pump 9 is by the well of cooling tower 4
Recirculated water in 8 is delivered in condenser 3.Recirculated water in condenser 3 can be also passed directly by the way that valvular pipeline is arranged
In the well 8 of cooling tower 4, the recirculated water in condenser 3 can be controlled to adjust by valve and be passed through in the first absorption heat pump 5
Amount.
In the thermal power plant unit steam extraction waste heat recycling system of the utility model, the first absorption heat pump and second absorption
Heat pump is respectively second-kind absorption-type heat pump.
The waste heat recycling system for reducing heat supply network return water temperature of the utility model is based on the waste heat of absorption heat pump
Recovery technology, using the steam in steam turbine as the high temperature driven heat source of the first absorption heat pump and the second absorption heat pump,
Start the first absorption heat pump and the running of the second absorption heat pump, and using heat supply network return water as the Low Temperature Thermal of the second absorption heat pump
The steam exhaust of more thermal power plant units or the waste heat of recirculated water are recycled to reduce heat supply network return water temperature in source, further heat heat supply network and follow
Ring water supplies user, improves unit energy utilization rate, reduces the use cost of user.
Although having made to retouch in detail to the utility model with a general description of the specific embodiments in this specification
State, but on the basis of the utility model, it can be made some modifications or improvements, this be to those skilled in the art it is aobvious and
It is clear to.Therefore, it is practical new to belong to this for these modifications or improvements on the basis of without departing from the spirit of the present invention
The claimed range of type.
Claims (8)
1. the waste heat recycling system that one kind can reduce heat supply network return water temperature, which is characterized in that including boiler, steam turbine, coagulate
Vapour device, cooling tower, the first absorption heat pump, the second absorption heat pump and heat-exchange device；
The steam (vapor) outlet of the boiler is connect with the steam inlet of the steam turbine, and the steam exhaust outlet of the steam turbine is coagulated with described
The steam inlet of vapour device connects, and the circulation water inlet of the condenser is connect with the well of the cooling tower, the condenser
Circulating water outlet is connect with the evaporator inlet of first absorption heat pump, the evaporator outlet of first absorption heat pump
It is connect with the well of the cooling tower；
The steam extraction outlet of the steam turbine is connect with the generator inlet of first absorption heat pump；The steam extraction of the steam turbine
Outlet is also connect with the generator inlet of second absorption heat pump；The steam extraction outlet of the steam turbine is gone back and heat-exchange device
Steam inlet connection；
The outlet of heat supply network return water is connect by the first water return pipeline with the evaporator inlet of second absorption heat pump, and described the
The evaporator outlet of two absorption heat pumps is connect with the absorber entrance of first absorption heat pump, first absorption type heat
The condensator outlet of pump is connect with the water inlet of the heat-exchange device, and the water outlet of the heat-exchange device passes through heat supply pipeline
The entrance to supply water with heat supply network is connect.
2. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that heat supply network
The outlet of return water is connect by the second water return pipeline with the absorber entrance of second absorption heat pump, and described second is absorption
The condensator outlet of heat pump is connect with the water inlet of the heat-exchange device.
3. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
Heat-exchange device is peak load calorifier.
4. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
The generator exports of first absorption heat pump are connect with condenser hotwell.
5. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
The generator exports of second absorption heat pump are connect with condenser hotwell.
6. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
The steam (vapor) outlet of heat-exchange device is connect with condenser hotwell.
7. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
Circulating pump is connected between circulation water inlet and the well of the cooling tower of condenser.
8. the waste heat recycling system according to claim 1 for reducing heat supply network return water temperature, which is characterized in that described
Recirculated water water return pipeline, the recirculated water return water are additionally provided between the circulating water outlet of condenser and the well of the cooling tower
Valve is provided on pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820249405.2U CN208253694U (en) | 2018-02-12 | 2018-02-12 | A kind of waste heat recycling system reducing heat supply network return water temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820249405.2U CN208253694U (en) | 2018-02-12 | 2018-02-12 | A kind of waste heat recycling system reducing heat supply network return water temperature |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030609A (en) * | 2019-03-22 | 2019-07-19 | 中冶西北工程技术有限公司 | Circulating cooling water afterheat recycling system |
| CN110849022A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Heat gradient utilization system for indirect air cooling system |
| CN113375211A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Coal-fired unit heating system and operation method |
| CN114427762A (en) * | 2022-03-11 | 2022-05-03 | 西安热工研究院有限公司 | System and method for utilizing return water waste heat of heat supply network by adopting absorption heat pump |
-
2018
- 2018-02-12 CN CN201820249405.2U patent/CN208253694U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030609A (en) * | 2019-03-22 | 2019-07-19 | 中冶西北工程技术有限公司 | Circulating cooling water afterheat recycling system |
| CN110030609B (en) * | 2019-03-22 | 2024-06-07 | 中冶西北工程技术有限公司 | Circulating cooling water waste heat recycling system |
| CN110849022A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Heat gradient utilization system for indirect air cooling system |
| CN113375211A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Coal-fired unit heating system and operation method |
| CN113375211B (en) * | 2021-06-28 | 2022-10-11 | 大唐环境产业集团股份有限公司 | Coal-fired unit heat supply system and operation method |
| CN114427762A (en) * | 2022-03-11 | 2022-05-03 | 西安热工研究院有限公司 | System and method for utilizing return water waste heat of heat supply network by adopting absorption heat pump |
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