CN109798582A - A kind of heat pump heat distribution system of depth exhaust steam residual heat recycling - Google Patents
A kind of heat pump heat distribution system of depth exhaust steam residual heat recycling Download PDFInfo
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- CN109798582A CN109798582A CN201910106461.XA CN201910106461A CN109798582A CN 109798582 A CN109798582 A CN 109798582A CN 201910106461 A CN201910106461 A CN 201910106461A CN 109798582 A CN109798582 A CN 109798582A
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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
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- 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
A kind of heat pump heat distribution system of depth exhaust steam residual heat recycling, including absorber, generator, condenser, the first jet type heat pump and heat supply network circuit；Absorber is circumscribed with turbine discharge pipeline；The liquid outlet and generator pipeline connection of absorber；Setting primary heater and condenser in the generator, primary heater heat the solution in generator；Generator liquid outlet and absorber pipeline connection；Heat supply network pipeline exports after sequentially passing through the condenser in absorber and generator；Extracted steam from turbine connects the higher pressure steam inlet of the first injector, and the low-pressure steam inlet of the first jet type heat pump is connected to the steam (vapor) outlet on generator top, the primary heater entrance of the middle pressure steam outlet connection generator of the first jet type heat pump；Heat pump system highly effective and safe can be run in the wide load range of unit, improve the driving energy of heat pump, so as to recycle more exhaust steam residual heats, improve system capacity utilization efficiency.
Description
Technical field
The invention belongs to exhaust steam of electric power plant waste heat recovering energy conserving fields, and in particular to a kind of heat pump of depth exhaust steam residual heat recycling
Heating system.
Background technique
High efficiente callback using fired power generating unit exhaust steam in steam turbine waste heat to improve China's efficiency of energy utilization, reduce environmental pollution
It is of great significance.It is to recycle it using the recycling external heat supply of exhaust steam in steam turbine waste heat of steam type lithium bromide absorption type heat pump
The effective means of waste heat.Peak regulation, longtime running are frequently participated in the reality of wide load setting in view of current China's fired power generating unit, are made
It will also be changed in a certain range for the extraction pressure of absorption heat pump driving heat source.In order to make heat pump system in unit underload
Under can also operate normally, design driving steam pressure will be less than rated load under extraction pressure.For steam type lithium bromide
Absorption heat pump, performance are driven heat source pressure influence very little, and excessively high when carry out steam pressure, can make generator generate fouling,
The problems such as corrosion, influences the safe operation of system.In addition, existing absorption type heat pump system is adopted when recycling exhaust steam in steam turbine waste heat
With the scheme of indirect utilization, steam exhaust heat is first transmitted to recirculated water, and heat pump is again using recirculated water as low-temperature heat source.The program increases
System investments and operating cost, and the quality of low-temperature heat source is reduced, influence the performance of system.
Summary of the invention
The present invention proposes a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling, can recycle more exhaust steam residual heats, mention
High system capacity utilization efficiency.
A kind of heat pump heat distribution system of depth exhaust steam residual heat recycling, including absorber, generator, condenser, the first injection
Formula heat pump and heat supply network circuit；It is characterized in that, absorber is circumscribed with turbine discharge pipeline；The liquid outlet and hair of absorber
Raw device pipeline connection；Setting primary heater and condenser in the generator, primary heater is to the solution in generator
Heating；Generator liquid outlet and absorber pipeline connection；The absorber is also circumscribed with heat supply network pipeline, and heat supply network pipeline is successively
It is exported after the condenser in absorber and generator；Primary heater access driving steam in generator is as heating warm
Source；Extracted steam from turbine connects the higher pressure steam inlet of the first jet type heat pump, and the low-pressure steam inlet of the first jet type heat pump connects
The steam (vapor) outlet in portion on the generator is connect, the primary heater of the middle pressure steam outlet connection generator of the first jet type heat pump enters
Mouthful.
The present invention is made by cancelling two links of evaporator heat release of steam exhaust and recirculated water heat exchange and recirculated water in heat pump
Heat pump system is greatly simplified, reduces system investments；Since two intermediate heat transfer process are omitted, system irreversible loss is reduced,
And recirculated water pump work can be saved, system performance greatly improves.
Heat pump system of the invention directly absorbs low-temperature steam exhaust, eliminates the evaporator link in conventional heat pump system, subtracts
Heat pump system investment and operating cost are lacked；
Present invention introduces double jet type heat pump structures on the one hand enable heat pump system in the wide load range of unit efficiently
Safe operation, on the other hand improves the driving energy of heat pump, so as to recycle more exhaust steam residual heats, improves system capacity benefit
Use efficiency；
The present invention eliminates condenser link, to Direct Air-Cooled fire due to being that steam exhaust is introduced directly into heat pump system
Heat supply network leaving water temperature can be improved for the recycling of motor group waste heat；Power generation can be reduced for the recycling of clammy fired power generating unit exhausted spare heat
Coa consumption rate.
Detailed description of the invention
Fig. 1 is jet type heat pump schematic diagram；
Fig. 2 is heat pump heat distribution system the first jet type heat pump connection schematic diagram of depth exhaust steam residual heat recycling；
Fig. 3 is heat pump heat distribution system the second jet type heat pump connection schematic diagram of depth exhaust steam residual heat recycling；
Wherein, absorber 1, generator 2, condenser 3, jet type heat pump 4A, jet type heat pump 4B, liquid knockout 5, desalination device
6, vacuum pump 7, solution pump 8, solution heat exchanger 9, valve 10, peak load calorifier 11, valve 12, boiler 13, steam turbine 14, hair
Motor 15, turbine bleed point 16, condenser 17, condensate pump 18, heat regenerative system 19, valve 20
Specific embodiment
The invention will be further described by 1-3 with reference to the accompanying drawing, it should be understood that content described herein is only used for
The bright and explanation present invention, is not intended to limit the present invention.
Jet type heat pump be a kind of structure it is simple, without mechanical moving element, safe and reliable energy saver, be widely used in
Multiple fields.Fig. 1 gives the schematic illustration of jet type heat pump, and jet type heat pump includes the higher pressure steam inlet of front end, side
The low-pressure steam inlet in face and the middle pressure steam outlet of end；Nozzle, low-pressure steam inlet are provided in higher pressure steam inlet
Positioned at the side of nozzle, high steam and low-pressure steam enter in mixing chamber mix after form middle pressure steam, it is finally last by being located at
The middle pressure steam at end exports output.High steam is introduced as power steam from higher pressure steam inlet, is formed by nozzle expansion
High speed steam flow, pressure reduction form low-pressure area, by low-pressure steam inlet draws low pressure steam to mixing chamber, reduction of speed liter after mixing
Swaging is exported through middle pressure steam at middle pressure steam of the pressure between high steam and low-pressure steam and is discharged, and its essence is utilizations
The kinetic energy of high steam promotes the pressure of low-pressure steam.
As shown in Fig. 2, a kind of steamer of coupling steam type injection-steam exhaust direct absorption combined heat-pump proposed by the present invention
Machine exhausted spare heat recovery system is by absorber 1, generator 2, condenser 3, jet type heat pump 4A, liquid knockout 5, desalination device 6, vacuum
Pump 7, solution pump 8, solution heat exchanger 9, valve 10, peak load calorifier 11, valve 12, boiler 13, steam turbine 14, generator
15, turbine bleed point 16, condenser 17, condensate pump 18, heat regenerative system 19, valve 20 etc. form.
Absorber 1 is circumscribed with turbine discharge pipeline, and turbine discharge is directly entered absorber 1；The gas of absorber 1 goes out
Mouth is connected with the incondensable gas pipeline for being provided with vacuum pump 7, and the liquid outlet of absorber 1 successively passes through on weak solution pipeline
Solution pump 8 and solution heat exchanger 9 be connected to the interior generator 2 equipped with condenser 3；Setting heating in the generator 2
Device, heater heat the solution in generator 2；The concentrated solution formed after heated pipeline heating in generator 2 is through sending out
Raw device outlet is connected with another entrance of solution heat exchanger 9, and is passed through in absorber 1 after solution heat exchanger 9；It is described
Absorber 1 be also circumscribed with heat supply network pipeline, heat supply network pipeline exports after sequentially passing through the condenser 3 in absorber 1 and generator 2,
The liquid outlet of condenser 3 is connected with hydrophobic steam condensation water lines are exported, and is provided with desalination in steam condensation water lines
Device 6.Wherein, solution is lithium-bromide solution, and the concentration of lithium-bromide solution is greater than lithium-bromide solution in absorber 1 in generator 2
Concentration, and the temperature of lithium-bromide solution is higher than the temperature of lithium-bromide solution in absorber 1 in generator 2.
Heat supply network return water, which passes sequentially through absorber 1, condenser 3, peak load calorifier 11, to be become outside heat supply network water supply to heat supply.Steamer
Machine steam extraction is passed through 11 shell-side of peak load calorifier, and setting bypasses and installs valve on peak load calorifier pipeline.
Wherein, the liquid knockout 5 for the drop being separated and recovered from steam is provided in generator 2, liquid knockout 5 is located at generator
In 2 between lithium-bromide solution liquid level and condenser 3.
Heater A access driving steam in generator 2 drives steam from jet type heat pump 4A's as heat source
Middle pressure steam outlet: extracted steam from turbine is entered by the higher pressure steam inlet of jet type heat pump 4A, and the low pressure of jet type heat pump 4A is steamed
Vapour entrance is connected to the steam (vapor) outlet on 2 top of generator, the heating of the middle pressure steam outlet connection generator 2 of jet type heat pump 4A
Device entrance；Condenser 3 is set in generator 2, and condenser vapor condensate line is connected on condenser 3；2 bottom of generator
Heating tube outlet connection driving steam drainage pipeline, driving steam drainage pipeline and condenser vapor condensate line converge
It closes, by desalination device 6 by hydrophobic feeding steam condenser of steam turbine set or oxygen-eliminating device, starts new circulation.Heater is using heating
Pipeline, the heating pipeline being arranged in generator are the shapes such as snakelike or annular.
Sufficiently to recycle exhausted spare heat, in system can additional another jet type heat pump 4B and respective heater B, be
Two jet type heat pumps and respective heater are existed simultaneously in system.As shown in figure 3, extracted steam from turbine is by another jet type heat pump
The higher pressure steam inlet of 4B enters, and the low-pressure steam inlet of jet type heat pump 4B connects steam turbine low-temperature steam exhaust, jet type heat pump
The heater B entrance of the middle pressure steam outlet connection generator 2 of 4B；By the way that part low-temperature steam exhaust is carried out by jet type heat pump
It is used for the heat source of heat pump generator after raising quality, further can sufficiently recycle the thermal energy in low-temperature steam exhaust.Two
Platform jet type heat pump can be arranged in the system of being installed on simultaneously, mutually coordinated work.
In order to realize system efficient operation in the wide load of unit, wide range of environmental conditions, in two jet type heat pumps
Valve is installed on jetting steam caused pipeline, setting bypasses and install valve between jet type heat pump entrance and exit, realizes
Jet type heat pump excision operation under certain condition.Setting bypasses and installs valve on peak load calorifier pipeline, realizes certain
Under the conditions of peak load calorifier excision operation.
System Working Principle is as follows:
Low-temperature steam exhaust enters absorber 1, is absorbed in absorber 1 by dense lithium-bromide solution, the heat that absorption process generates
It is confessed outward by hot net water；Dense lithium-bromide solution becomes dilute lithium-bromide solution after absorbing low-temperature steam exhaust, adds by solution pump 8
Pressure, solution heat exchanger 9 enter generator 2 after heating, and are heated by driving steam, release steam, form dense lithium-bromide solution, pass through
Enter absorber 1 after solution heat exchanger 4 is cooling, forms heat pump cycle.A part of steam that generator 2 generates is (referred to as by injection
Steam) low pressure gas as jet type heat pump 4A, carry out the driving after vapour is mixed through jet type heat pump 4A as generator 2 with high pressure
Steam；Another part steam that generator 2 generates heats hot net water in condenser 3, and heat is supplied outward by hot net water
Out.The steam condensate formed in the driving steam drainage and condenser 3 that generator 2 is formed is sent into Steam Turbine condensing after converging
Device starts new circulation.Heat supply network return water, which passes sequentially through absorber 1, condenser 3, peak load calorifier 11, becomes right outside heat supply network water supply
Heat supply.In order to realize system efficient operation in the wide load of unit, wide range of environmental conditions, in being steamed by injection for jet type heat pump
Valve 10 is installed, setting bypasses and install valve 20 between jet type heat pump entrance and exit, heats in spike on vapor pipeline
Setting bypasses and installs valve 12 on device pipeline, is separately implemented at jet type heat pump under certain condition, peak load calorifier excision fortune
Row.
Since incondensable gas may be contained in exhaust steam in steam turbine, vacuum pump 7 is set on absorber 1 to guarantee system
Vacuum degree；In view of the steam that generator generates may carry some lithium-bromide solution drops, to reduce lithium-bromide solution damage
Liquid knockout 5 is arranged in generator 2 to be separated and recovered from the liquid in steam in the normal operation for losing, guaranteeing jet type heat pump system
Drop.
In order to which the quality for the driving steam drainage that the steam condensation for forming condenser 3 is hydrophobic and generator 2 is formed meets
Industrial requirement is provided with desalination device 6 in the hydrophobic pipeline.
It in unit running on the lower load, just trembles with fear the phase in heating, utilizes one that jet type heat pump 4A suction generator 2 generates
Divide heat source of the steam as heat pump generator, jet type heat pump 4A puts into operation, and jet type heat pump 4B excision is out of service；
In the heating deep cold phase, increase the second heating heat using jet type heat pump 4B pumping unit low-temperature steam exhaust as heat pump generator
Source, jet type heat pump 4A, 4B put into operation simultaneously；When for thermal spike, investment peak load calorifier operation.
In unit high load capacity operating condition, in heating, just cold phase, jet type heat pump 4A bypass are opened, and extracted steam from turbine is as warm
The heat source of generator is pumped, jet type heat pump 4A, 4B excision are out of service；In the heating deep cold phase, increases and utilize injecting type heat
Second heat source of the 4B pumping unit low-temperature steam exhaust as heat pump generator is pumped, jet type heat pump 4B puts into operation；For thermal spike
When peak, investment peak load calorifier operation.
Two jet type heat pumps are mutually spare, realize work switching, can be improved for thermally safe, avoid heat supply accident.Work as spray
When penetrating formula heat pump 4A failure, jet type heat pump 4A excision is out of service, is worked independently using jet type heat pump 4B, ensures heat supply fortune
Row.When jet type heat pump 4B failure, jet type heat pump 4B excision is out of service, is worked independently using jet type heat pump 4A, protects
Hinder heat supply running.
Compared with conventional bromination lithium-absorbing formula heat pump steam turbine exhaust heat recovery system, coupling steam proposed by the present invention
Type injection-steam exhaust direct absorption combined heat-pump exhaust steam in steam turbine depth residual neat recovering system, on the one hand eliminates evaporator,
System is simplified, investment is reduced, improves system performance, reduce operating cost；Another aspect feasible system is in unit
Efficient operation in wide load, wide range of environmental conditions.
The present invention is not only suitable for being more suitable for air cooling unit for wet type cooling unit.
Finally, it should be noted that being not intended to restrict the invention the foregoing is merely explanation of the invention, although to this hair
It is bright to be described in detail, it for those skilled in the art, still can be to aforementioned documented technical solution
It modifies or equivalent replacement of some of the technical features.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling, including absorber, generator, condenser, the first injecting type
Heat pump and heat supply network circuit；It is characterized in that, absorber is circumscribed with turbine discharge pipeline；The liquid outlet of absorber and generation
Device pipeline connection；Setting primary heater and condenser, primary heater add the solution in generator in the generator
Heat；Generator liquid outlet and absorber pipeline connection；The absorber is also circumscribed with heat supply network pipeline, and heat supply network pipeline is successively worn
It is exported after crossing the condenser in absorber and generator；Primary heater access driving steam in generator is as heating warm
Source；Extracted steam from turbine connects the higher pressure steam inlet of the first jet type heat pump, and the low-pressure steam inlet of the first jet type heat pump connects
The steam (vapor) outlet in portion on the generator is connect, the primary heater of the middle pressure steam outlet connection generator of the first jet type heat pump enters
Mouthful.
2. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 1, which is characterized in that further include
Second jet type heat pump and secondary heater；Secondary heater is set in generator, is heated to the solution in generator；Occur
Secondary heater access driving steam in device is as heat source；The high pressure that extracted steam from turbine connects the second jet type heat pump is steamed
Vapour entrance, the low-pressure steam inlet of the second jet type heat pump connect turbine discharge pipeline, and the middle pressure of the second jet type heat pump is steamed
The secondary heater entrance of vapor outlet connection generator.
3. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 1, which is characterized in that further include
Peak load calorifier, heat supply network pipeline export after sequentially passing through absorber, condenser and peak load calorifier in generator, and steam turbine is taken out
Vapour connects peak load calorifier shell-side.
4. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 1, which is characterized in that condenser
It is set in generator, condenser vapor condensate line is connected on condenser；The heater outlet of generator bottom connects
Steam drainage pipeline is driven, driving steam drainage pipeline converges with condenser vapor condensate line, will be hydrophobic by desalination device
It is sent into steam condenser of steam turbine set or oxygen-eliminating device.
5. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 4, which is characterized in that heater
Using heating pipeline, the heating pipeline being arranged in generator is snakelike or annular.
6. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 1, which is characterized in that absorber
Liquid outlet be connected to generator by solution heat exchanger, the liquid outlet of generator and solution heat exchanger it is another enter
Mouth is connected, and is passed through in absorber after solution heat exchanger.
7. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 2, which is characterized in that each
Jet type heat pump is installed valve on jetting steam caused pipeline, and setting is bypassed and installed between jet type heat pump entrance and exit
Valve, setting bypasses and installs valve on peak load calorifier pipeline, distinguishes two jet type heat pumps, spikes under certain condition
Heater excision operation.
8. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 7, which is characterized in that in unit
It when running on the lower load, just trembles with fear the phase in heating, a part of steam generated using the first jet type heat pump suction generator is as warm
The first heat source of generator is pumped, the first jet type heat pump puts into operation, and the excision of the second jet type heat pump is out of service；It is supplying
The warm deep cold phase increases using the second jet type heat pump pumping unit low-temperature steam exhaust as the second heat source of heat pump generator,
Two jet type heat pumps put into operation simultaneously；When for thermal spike, investment peak load calorifier operation；
In unit high load capacity operating condition, in heating, just cold phase, the bypass of the first jet type heat pump are opened, extracted steam from turbine directly as
First heat source of heat pump generator, the excision of two jet type heat pumps are out of service；In the heating deep cold phase, increases and utilize the second spray
Second heat source of the formula heat pump pumping unit low-temperature steam exhaust as heat pump generator is penetrated, the second jet type heat pump puts into operation；
When for thermal spike, investment peak load calorifier operation.
9. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 7, which is characterized in that two sprays
The formula heat pump of penetrating is mutually spare, realizes work switching；When the first jet type heat pump failure, the excision of the first jet type heat pump stops fortune
Row, is worked independently using the second jet type heat pump, ensures heat supply running；When the second jet type heat pump failure, the second injecting type
Heat pump excision is out of service, is worked independently using the first jet type heat pump, ensures heat supply running.
10. a kind of heat pump heat distribution system of depth exhaust steam residual heat recycling according to claim 1, which is characterized in that inhaling
It receives and vacuum pump is set on device, liquid knockout is set in generator to be separated and recovered from the drop in steam.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811304557 | 2018-11-04 | ||
| CN2018113045579 | 2018-11-04 |
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| CN109798582A true CN109798582A (en) | 2019-05-24 |
| CN109798582B CN109798582B (en) | 2020-06-23 |
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| CN201910106461.XA Active CN109798582B (en) | 2018-11-04 | 2019-02-02 | Heat pump heating system capable of deeply recovering waste heat of dead steam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748873A (en) * | 2019-10-08 | 2020-02-04 | 河南理工大学 | Exhaust steam heat regeneration system of power plant |
| CN113623707A (en) * | 2021-07-19 | 2021-11-09 | 西安交通大学 | Multi-heat-source driving injection-absorption composite heat pump system and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748873A (en) * | 2019-10-08 | 2020-02-04 | 河南理工大学 | Exhaust steam heat regeneration system of power plant |
| CN110748873B (en) * | 2019-10-08 | 2021-04-16 | 河南理工大学 | Exhaust steam heat regeneration system of power plant |
| CN113623707A (en) * | 2021-07-19 | 2021-11-09 | 西安交通大学 | Multi-heat-source driving injection-absorption composite heat pump system and working method thereof |
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|---|---|
| CN109798582B (en) | 2020-06-23 |
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Address after: 100097 Floor 1-12, 120 Zizhuyuan Road, Haidian District, Beijing Applicant after: Datang (Beijing) Energy Management Co., Ltd. Applicant after: DATANG ENVIRONMENT INDUSTRY GROUP CO., LTD. Applicant after: China Datang Group Co., Ltd. Address before: 100097 Floor 1-12, 120 Zizhuyuan Road, Haidian District, Beijing Applicant before: Datang (Beijing) Energy Management Co., Ltd. Applicant before: DATANG ENVIRONMENT INDUSTRY GROUP CO., LTD. Applicant before: China Datang Power Group Corporation |
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