CN102435015B - Condensation heat recovery device in power station - Google Patents

Condensation heat recovery device in power station Download PDF

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Publication number
CN102435015B
CN102435015B CN2011102911087A CN201110291108A CN102435015B CN 102435015 B CN102435015 B CN 102435015B CN 2011102911087 A CN2011102911087 A CN 2011102911087A CN 201110291108 A CN201110291108 A CN 201110291108A CN 102435015 B CN102435015 B CN 102435015B
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China
Prior art keywords
water
pipeline
heat pump
inner loop
cwr road
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Expired - Fee Related
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CN2011102911087A
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Chinese (zh)
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CN102435015A (en
Inventor
李同强
李志搏
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Zhejiang Gongshang University
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Zhejiang Gongshang University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems

Abstract

The invention relates to a heat recovery device and discloses a condensation heat recovery device in a power station. The condensation heat recovery device comprises a steam pipeline (4), a high-temperature waste-water pipeline (6), a cooling water circulation pipeline (1) and a demineralized water pipeline (5), wherein the steam pipeline (4) is connected with a steam engine (41) and a condenser (13); the high-temperature waste-water pipeline (6) is connected with a lithium bromide refrigerating machine (8) and an absorbing heat pump (7); the cooling water circulation pipeline (1) passes through the condenser (13), absorbing heat pump (7) and the lithium bromide refrigerating machine (8) from a cooling circulation water tank (12), and returns to the cooling circulation water tank (12). In the condensation heat recovery device, condensation heat in the power station is recycled for refrigeration by adopting a heat pump technology, so that the steam-type water losing by the power station can be congealed, recovered and recycled, and the condensation heat recovery device has the advantages of high recycling ratio of water resource, energy saving and environmental protection.

Description

Condensation heat recovery device in power station
Technical field
The present invention relates to a kind of heat reclamation device, relate in particular to a kind of condensation heat recovery device in power station.
Background technology
The thermal power plant condensation heat enters atmosphere by cooling tower or Air-Cooling Island and forms huge heat-energy losses, is the low main cause of thermal power plant energy use efficiency, not only causes the waste of energy and water or electricity, has also seriously polluted atmosphere simultaneously.The thermal power plant condensation heat is emptying, is the ubiquitous problem in China and even the world, is waste, is also helpless.Yet along with the development of heat pump techniques, the particularly appearance of large high-temperature water resource heat pump, make generating set save Water Energy, recovering condensing heat will become possibility.
Summary of the invention
The present invention is directed to condensation heat in prior art, steam heat and be difficult to utilize and reclaim, a kind of water that heat pump techniques reclaims power plant's vapor form and condensation heat recovery device in power station of waste water residual heat of adopting is provided.
In order to solve the problems of the technologies described above, the present invention is solved by following technical proposals:
Condensation heat recovery device in power station, comprise steam pipework, hot waste water pipeline, cooling water circulation pipeline, demineralized water pipeline, and described steam pipework connects steam turbine and condenser; The hot waste water pipeline connects lithium bromide refrigerator and sorption type heat pump, and then boiler wastewater is discharged into to wastewater disposal basin; The cooling water circulation pipeline, from the cool cycles pond, is got back to the cool cycles pond after condenser, sorption type heat pump, lithium bromide refrigerator.The steam that steam turbine produces is delivered to condenser, steam through condenser by thermal energy transfer to the cooling water in the cooling water circulation pipeline, with the cooling water of heat energy through sorption type heat pump and with inner loop pipeline, carry out heat exchange in sorption type heat pump, inner loop pipeline by the water water-to-water heat exchanger by thermal energy transfer to the demineralized water pipeline.The hot waste water pipeline, namely boiler continuous blow-down and the sewage regularly discharged, this hot waste water pipeline is by the heat exchange at lithium bromide refrigerator and sorption type heat pump, by thermal energy transfer to cooling water circulation pipeline and CWR road, wherein the CWR road again by the water water-to-water heat exchanger by thermal energy transfer to the demineralized water pipeline.Cooling water circulation pipeline and hot waste water pipeline all pass through lithium bromide refrigerator, and the heat energy in its pipeline can be used as the heat dynamic resource of lithium bromide refrigerator, and cooling circulating water is freezed, and improve condenser efficiency.
Described cooling water circulation pipeline also passes through centrifugal heat pump, and centrifugal heat pump is arranged between sorption type heat pump and lithium bromide refrigerator.Cooling water circulation pipeline (1) also is provided with coolant circulation pump (11), and described coolant circulation pump (11) is positioned between cool cycles pond (12) and condenser (13); By centrifugal heat pump is set, the heat energy through the cooling water of sorption type heat pump can be carried out to further thermal energy exchange, by inner loop pipeline by the thermal energy transfer in the cooling water circulation pipeline to the demineralized water pipeline, improved the utilization rate of heat energy.
On described cooling water circulation pipeline, also be provided with the CWR road, the CWR road is through the water water-to-water heat exchanger, and the demineralized water pipeline also passes through the water water-to-water heat exchanger; The water inlet on CWR road is arranged between centrifugal heat pump and lithium bromide refrigerator, and the water return outlet on CWR road is arranged between condenser and sorption type heat pump.By the CWR road is set, can select to open CWR road water compensating valve, the cooling water after centrifugal heat pump carries out heat exchange is transmitted back to sorption type heat pump again and carries out heat exchange.Simultaneously, the demineralized water pipeline is also passed through on the CWR road, and a part of heat energy is directly passed to the demineralized water pipeline.
As preferably, also comprise inner loop pipeline, inner loop pipeline is through centrifugal heat pump, sorption type heat pump, lithium bromide refrigerator and water water-to-water heat exchanger.Described inner loop pipeline (3) is also with inner loop pipeline circulating pump (31) and inner loop pipeline water compensating valve (32).Inner loop pipeline carries out heat exchange by the lithium bromide refrigerator in the sorption type heat pump on the cooling water circulation pipeline, hot waste water pipeline and the centrifugal heat pump on the CWR road and obtains heat energy, then by the water water-to-water heat exchanger, the heat energy of acquisition is passed to the demineralized water pipeline in the mode of heat exchange.
As preferably, described CWR road is provided with CWR road circulating pump and CWR road water compensating valve, and CWR road water compensating valve is arranged on the CWR road entered before lithium bromide refrigerator.By opening CWR road water compensating valve, can carry out the secondary recovery utilization to the cooling water through sorption type heat pump, improve the utilization ratio of heat energy.
As preferably, described inner loop pipeline is provided with the inner loop pipeline water compensating valve.Along with the water in inner loop pipeline has certain evaporating loss at the continuous release heat energy that absorbs, therefore, logical inner loop pipeline water compensating valve can carry out certain supplementing to the water in inner loop pipeline, thus the normal operation of assurance inner loop pipeline.
The present invention, by adopting heat pump techniques, makes the water of the steam form of power plant's loss be able to condensation, recovery, and again utilizes, and has a water resource recovery utilization rate high, the advantage of energy-conserving and environment-protective.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
1-cooling water circulation pipeline wherein, 2-CWR road, the 3-inner loop pipeline, the 4-steam pipework, 5-demineralized water pipeline, 6-hot waste water pipeline, the 7-sorption type heat pump, the 8-lithium bromide refrigerator, 9-water water-to-water heat exchanger, the centrifugal heat pump of 10-, the 11-coolant circulation pump, 12-cool cycles pond, the 13-condenser, 21-CWR road circulating pump, 22-CWR road water compensating valve, 31-inner loop pipeline circulating pump, 32-inner loop pipeline water compensating valve, the 41-steam turbine, 51-demineralized water pipeline circulating pump, 52-demineralized water water return pipeline control valve, the 53-oxygen-eliminating device, the 54-sweet-water tank, the 61-wastewater disposal basin.
The specific embodiment
Below in conjunction with accompanying drawing 1 and the specific embodiment, the present invention is described in further detail:
Embodiment 1
Condensation heat recovery device in power station, as shown in Figure 1, comprise steam pipework 4, hot waste water pipeline 6, cooling water circulation pipeline 1, demineralized water pipeline 5, and described steam pipework 4 connects steam turbine 41 and condenser 13; Hot waste water pipeline 6 connects lithium bromide refrigerator 8 and sorption type heat pump 7; Cooling water circulation pipeline 1, from cool cycles pond 12, is got back to cool cycles pond 12 after condenser 13, sorption type heat pump 7, lithium bromide refrigerator 8.The steam that steam turbine 41 produces is delivered to condenser 13, steam through condenser 13 by thermal energy transfer to the cooling water in cooling water circulation pipeline 1, with the cooling water of heat energy, with inner loop pipeline 3, carry out heat exchange through sorption type heat pump 7 and sorption type heat pump 7 in, inner loop pipeline 3 pass through water water-to-water heat exchanger 9 by thermal energy transfer to demineralized water pipeline 5.Hot waste water pipeline 6 is by the heat exchange at lithium bromide refrigerator 8 and sorption type heat pump 7, by thermal energy transfer to cooling water circulation pipeline 1 and CWR road 2, wherein CWR road 2 again by water water-to-water heat exchanger 9 by thermal energy transfer to demineralized water pipeline 5.Cooling water circulation pipeline 1 and hot waste water pipeline 6 all pass through lithium bromide refrigerator 8, and the heat energy in its pipeline can be used as the heat dynamic resource of lithium bromide refrigerator 8, freezes.Hot waste water pipeline 6 passes through successively lithium bromide refrigerator 8, sorption type heat pump 7 and discharges heat energy.Wherein, cooling water circulation pipeline 1 is that j1, CWR road 2 are j6 for j4, demineralized water pipeline 5 for j5, hot waste water pipeline 6 for j3, steam pipework 4 for j2, inner loop pipeline 3.
Cooling water circulation pipeline 1 also passes through centrifugal heat pump 10, and centrifugal heat pump 10 is arranged between sorption type heat pump 7 and lithium bromide refrigerator 8.By centrifugal heat pump 10 is set, the heat energy through the cooling water of sorption type heat pump 7 can be carried out to further thermal energy exchange, by inner loop pipeline 3 by the thermal energy transfer in cooling water circulation pipeline 1 to demineralized water pipeline 5, improved the utilization rate of heat energy.Cooling water circulation pipeline 1 is provided with coolant circulation pump 11, and coolant circulation pump 11 is arranged between cool cycles pond 12 and condenser 13.Cooling water circulation pipeline 1 passes through successively sorption type heat pump 7, centrifugal heat pump 10, lithium bromide refrigerator 8 and discharges heat energy.
On cooling water circulation pipeline 1, also be provided with CWR road 2, CWR road 2 is through water water-to-water heat exchanger 9, and demineralized water pipeline 5 also passes through water water-to-water heat exchanger 9; The water inlet on CWR road 2 is arranged between centrifugal heat pump 10 and lithium bromide refrigerator 8, and the water return outlet on CWR road 2 is arranged between condenser 13 and sorption type heat pump 7.By CWR road 2 is set, can select to open CWR road water compensating valve 22, the cooling water after centrifugal heat pump 10 carries out heat exchange is transmitted back to sorption type heat pump 7 again and carries out heat exchange.Simultaneously, demineralized water pipeline 5 is also passed through on CWR road 2, and a part of heat energy is directly passed to demineralized water pipeline 5.On CWR road 2, also be provided with CWR road circulating pump 21.CWR road 2 is by absorbing heat energy at lithium bromide refrigerator 8 places, then by water water-to-water heat exchanger 9 by thermal energy transfer to demineralized water pipeline 5, then enter sorption type heat pump 7 with entering after cooling water circulation pipeline 1 before sorption type heat pump 7 converges.
Demineralized water pipeline 5 connects sweet-water tanks 54, through with water water-to-water heat exchanger 9 after by the demineralized water water return pipeline, get back to brine tank 54.Heat energy in demineralized water pipeline 5 obtains by water water-to-water heat exchanger 9.Demineralized water pipeline 5 is provided with demineralized water pipeline circulating pump 51, and demineralized water pipeline circulating pump 51 is arranged between water water-to-water heat exchanger 9 and brine tank 54.Demineralized water pipeline 5 through with water water-to-water heat exchanger 9 after absorb heat energy.After the interior water temperature of demineralized water pipeline 5 is increased to more than 90 ℃, open demineralized water water return pipeline control valve 52, by delivery to oxygen-eliminating device 53.
Also comprise inner loop pipeline 3, inner loop pipeline 3 is through centrifugal heat pump 10, sorption type heat pump 7, lithium bromide refrigerator 8 and water water-to-water heat exchanger 9.Inner loop pipeline 3 carries out heat exchange by the sorption type heat pump 7 on cooling water circulation pipeline 1, lithium bromide refrigerator 8 in hot waste water pipeline 6 and the centrifugal heat pump on CWR road 2 10 and obtains heat energy, then by water water-to-water heat exchanger 9, the heat energy of acquisition is passed to demineralized water pipeline 5 in the mode of heat exchange.Inner loop pipeline 3 is provided with inner loop pipeline circulating pump 31, and inner loop pipeline circulating pump 31 is arranged between centrifugal heat pump 10 and water water-to-water heat exchanger 9.Water in inner loop pipeline 3 obtains heat energy after centrifugal heat pump 10, temperature is increased to more than 70 ℃, now at the sorption type heat pump 7 of flowing through, because the cooling water temperature through sorption type heat pump 7 is higher, therefore after the water in inner loop pipeline 3 is continued heating, inner loop pipeline 3 is through lithium bromide refrigerator 8 release portion heat energy, and then temperature drops to below 53 ℃ after water water-to-water heat exchanger 9 continues to discharge heat energy.
CWR road 2 is provided with CWR road circulating pump 21 and CWR road water compensating valve 22, and CWR road water compensating valve 22 is arranged on and enters on lithium bromide refrigerator 8 CWR road 2 before.By opening CWR road water compensating valve 22, can carry out the secondary recovery utilization to the cooling water through sorption type heat pump 7, improve the utilization ratio of heat energy.After CWR road water compensating valve 22 is opened, through the hot water of centrifugal heat pump 10 is a part of, continue on cooling water circulation pipeline 1, another part enters CWR road 2; Now, by CWR road water compensating valve 22, supplement and enter the normal-temperature water that temperature is lower, make the water temperatures that enter before lithium bromide refrigerator 8 by CWR road 2 greatly reduce, and through lithium bromide refrigerator 8 time, absorbed heat energy, then this part heat energy has been passed to demineralized water pipeline 5 by water water-to-water heat exchanger 9.
The demineralized water water return pipeline is provided with demineralized water water return pipeline control valve 52, is provided with the deoxygenation pipeline between water water-to-water heat exchanger 9 and demineralized water water return pipeline control valve 52, and the deoxygenation pipeline is connected with oxygen-eliminating device 53.When demineralized water water return pipeline control valve 52 was opened, the water in demineralized water pipeline 5 was back to sweet-water tank 54 after by water water-to-water heat exchanger 9; When demineralized water water return pipeline control valve 52 was closed, the water in demineralized water pipeline 5 entered oxygen-eliminating device 53 by the deoxygenation pipeline after by water water-to-water heat exchanger 9.
Steam pipework 4 is through steam turbines 41, and the steam that steam turbine 41 is produced is delivered to condenser 13, steam through condenser 13 by thermal energy transfer to the cooling water in cooling water circulation pipeline 1 after solidifying water discharge.Steam work done in steam turbine that boiler produces, in the cyclic process of this heating agent, need to emit a large amount of condensation heat, steam after the steam turbine work done enters condenser 13 by steam discharge, in the process of condenser 13 condensations, discharge heat energy and condense into water and after backheat, enter again boiler, now, through the cooling water temperature in condenser 13 cooling water circulation pipelines 1, raise.
Inner loop pipeline 3 is provided with inner loop pipeline water compensating valve 32.Along with the water in inner loop pipeline 3, discharge heat energy and have certain evaporating loss constantly absorbing, therefore, logical inner loop pipeline water compensating valve 32 can carry out to the water in inner loop pipeline 3 certain supplementing, thereby guarantees the normal operation of inner loop pipeline 3.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.

Claims (4)

1. condensation heat recovery device in power station, comprise steam pipework (4), hot waste water pipeline (6), cooling water circulation pipeline (1), demineralized water pipeline (5), it is characterized in that: described steam pipework (4) connects steam turbine (41) and condenser (13); Hot waste water pipeline (6) connects lithium bromide refrigerator (8) and sorption type heat pump (7), and then boiler wastewater is discharged into to wastewater disposal basin (61); Cooling water circulation pipeline (1), from cool cycles pond (12), is got back to cool cycles pond (12) after condenser (13), sorption type heat pump (7), lithium bromide refrigerator (8) refrigeration;
Described cooling water circulation pipeline (1) also passes through centrifugal heat pump (10), and centrifugal heat pump (10) is arranged between sorption type heat pump (7) and lithium bromide refrigerator (8); Cooling water circulation pipeline (1) also is provided with coolant circulation pump (11), and described coolant circulation pump (11) is positioned between cool cycles pond (12) and condenser (13);
On described cooling water circulation pipeline (1), also be provided with CWR road (2), CWR road (2) through water water-to-water heat exchanger (9), demineralized water pipeline (5) also passes through water water-to-water heat exchanger (9); The water inlet on CWR road (2) is arranged between centrifugal heat pump (10) and lithium bromide refrigerator (8), and the water return outlet of CWR road (2) is arranged between condenser (13) and sorption type heat pump (7).
2. condensation heat recovery device in power station according to claim 1, it is characterized in that: also comprise inner loop pipeline (3), inner loop pipeline (3) is through centrifugal heat pump (10), sorption type heat pump (7), lithium bromide refrigerator (8) and water water-to-water heat exchanger (9); Described inner loop pipeline (3) is also with inner loop pipeline circulating pump (31) and inner loop pipeline water compensating valve (32).
3. condensation heat recovery device in power station according to claim 1, it is characterized in that: described CWR road (2) is provided with CWR road circulating pump (21) and CWR road water compensating valve (22), and CWR road water compensating valve (22) is arranged on and enters on lithium bromide refrigerator (8) CWR road (2) before.
4. condensation heat recovery device in power station according to claim 2, it is characterized in that: described inner loop pipeline (3) is provided with inner loop pipeline water compensating valve (32).
CN2011102911087A 2011-09-29 2011-09-29 Condensation heat recovery device in power station Expired - Fee Related CN102435015B (en)

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CN102997224A (en) * 2012-12-25 2013-03-27 浙江工商大学 Power plant condensing heat recycle system
CN102997311B (en) * 2012-12-25 2017-01-25 浙江工商大学 Power plant condensing heat recovery heat supply system
CN104807237B (en) * 2015-04-29 2017-05-24 北京中南亚太环境科技发展有限公司 Energy-saving device applying lithium bromide

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