CN107621002A - Utilize the step heating means and system of combined heat pump recovery exhaust steam of electric power plant waste heat - Google Patents
Utilize the step heating means and system of combined heat pump recovery exhaust steam of electric power plant waste heat Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- 239000010908 plant waste Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 162
- 238000010521 absorption reaction Methods 0.000 claims abstract description 73
- 230000006835 compression Effects 0.000 claims abstract description 48
- 238000007906 compression Methods 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 26
- 239000000498 cooling water Substances 0.000 claims description 17
- 239000002918 waste heat Substances 0.000 claims description 12
- 230000000630 rising effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims 1
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 239000006096 absorbing agent Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 206010009866 Cold sweat Diseases 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002699 waste material Substances 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
- 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
Abstract
The invention discloses the step heating means and system using combined heat pump recovery exhaust steam of electric power plant waste heat,Steam Turbine including providing exhaust steam,Reclaim the condenser of exhaust steam residual heat,Drawn gas the turbine of driving using the high-grade of Steam Turbine,The compression heat pump driven using turbine,The steam type absorption heat pump that steam discharge drives after being done work using turbine,The equipment such as the peak load calorifier heated to hot net water and the above-mentioned each equipment of connection are to reclaim the vapour system of exhaust steam residual heat,Heat supply network water system and bypass water system,The characteristics of system combination compression heat pump and steam type absorption heat pump,Realize the cascade utilization for the energy grade that draws gas,The step heat exchange process of water and hot net water is bypassed by optimizing simultaneously,Make driving steam,Bypass water and hot net water the three Proper Match in heat transfer process,Reduce the irreversible loss of heat transfer process while deep exploitation exhaust steam residual heat,Improve system entirety efficiency.
Description
Technical field
The invention belongs to exhaust steam of electric power plant field of waste heat utilization, and in particular to one kind makes full use of steam-turbine acting ability
Combined heat pump is driven, reclaims the step heating means and system of exhaust steam in steam turbine waste-heat hot net water.
Background technology
Abundant exhaust steam in steam turbine residual heat resources are contained in power plant, are main at present with heat pump recovery exhaust steam in steam turbine waste heat
Exhaust steam residual heat Application way, wherein with steam-powered compression heat pump and steam type absorption heat pump using relatively broad.
For steam-powered compression heat pump, under same pressure drop amplitude, steam is stronger in pressure upper sector acting ability.
But if driving steam pressure relatively low, ability of not only doing work is smaller, and can make it that turbine volume is larger, gives site layout project band
Next difficult, equipment investment is also corresponding larger.Therefore, steam-powered compression heat pump is particularly suited for the higher field of steam pressure
Close.
For steam type absorption heat pump, double effect absorption type heat pump and single-effective absorption heat pump are broadly divided into.Double-effect absorption
Although formula heat pump can be by the use of the steam of elevated pressures as driving force, hot net water increasing extent of temperature is smaller, and device structure is complicated,
Invest it is larger, it is less to utilize project applied to large-scale exhaust steam residual heat.And if high steam is used to drive single-effective absorption hot
Pump, the acting ability of high-grade steam can not be not fully exerted, and irreversible loss is larger.In addition, for separate unit absorption type heat
For pump, it is difficult to which realization is run under conditions of evaporating temperature and the condensation temperature temperature difference are larger.
For steam type absorption heat pump, double effect absorption type heat pump and single-effective absorption heat pump are broadly divided into.Double-effect absorption
Although formula heat pump can be by the use of the steam of elevated pressures as driving force, hot net water increasing extent of temperature is smaller, and device structure is complicated,
Invest it is larger, it is less to utilize project applied to large-scale exhaust steam residual heat.And if high steam is used to drive single-effective absorption hot
Pump, the acting ability of high-grade steam can not be not fully exerted, and irreversible loss is larger.In addition, for separate unit absorption type heat
For pump, it is difficult to which realization is run under conditions of evaporating temperature and the condensation temperature temperature difference are larger.
Therefore, be can be seen that from the characteristics of above-mentioned two classes heat pump when extraction pressure is higher, using steam-powered compression
Formula heat pump not only can rationally utilize the acting capability improving efficiency of high steam, and can reduce investment.When extraction pressure drops
After low, single-effective absorption heat pump is driven with it, steam parameter and the matching of hot net water parameter are rational, both improve heat pump
Can, it in turn ensure that heat pump has larger increasing extent of temperature.The characteristic of two class heat pumps is optimized by way of combined heat pump
Integrate, be beneficial to lifting system entirety efficiency.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of acting ability driving made full use of compared with high-grade steam
The method and system of the exhaust heat stepped heating hot net water of combined heat pump recovery exhaust steam in steam turbine, this method and system effectively combine
The characteristics of steam-powered compression heat pump and steam type absorption heat pump, on the one hand realize the step profit for the energy grade that draws gas
With on the other hand, by the step heat exchange process for optimizing bypass water and hot net water so that driving steam, bypass water and hot net water
Three's energy level in heat transfer process has obtained Proper Match, while deep exploitation exhaust steam in steam turbine waste heat, reduces and changes
The irreversible loss of thermal process, effectively increase system entirety efficiency.
To solve the above problems, the technical solution used in the present invention is：
A kind of step heating means that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, this method is by Steam Turbine Gao Pin
Position, which is drawn gas, drives combining heat pump to reclaim exhaust steam in steam turbine, and step liter is carried out to hot net water using the characteristic of combining heat pump
Temperature, step cooling is carried out to bypass water, specifically includes below scheme：
1) extract Steam Turbine high-grade to draw gas, driving compression heat pump recovery exhaust steam residual heat, high-grade is drawn gas after acting
Steam discharge continue to drive steam type absorption heat pump recovery exhaust steam residual heat；
2) exhaust steam of Steam Turbine heats up through condenser heat exchange to hot net water, and the hot net water after heating sequentially enters pressure
Contracting formula heat pump, steam type absorption heat pump carry out step temperature rising；
3) using the hot net water in step 2) after condenser exchanges heat as bypass water, steam type absorption type heat is sequentially entered
Pump, compression heat pump again return to condenser after carrying out step cooling and Steam Turbine exhaust steam heat exchange heats up.
A kind of step heating system that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, the system include providing exhaust steam
Steam Turbine, the condenser for reclaiming exhaust steam residual heat, driving of being drawn gas using the high-grade of Steam Turbine turbine, utilize turbine
The compression heat pump of driving, done work using turbine after the steam type absorption heat pump that drives of steam discharge and the above-mentioned each equipment of connection
To reclaim the vapour system of exhaust steam residual heat, heat supply network water system and bypass water system, wherein：
For vapour system, Steam Turbine is drawn gas into turbine acting driving compression heat pump recovery exhaust steam residual heat,
Steam discharge driving steam type absorption heat pump recovery exhaust steam residual heat after acting；
For heat supply network water system, after once net backwater enters condenser heating by once net water return pipeline, compression is first passed through
Formula heat pump heats up, then enters once net water supply line after being heated up by steam type absorption heat pump；
For bypass water system, bypass water system bypass backwater of the water from heat supply network water system, the one of heat supply network water system
After secondary net backwater enters condenser heating by once net water return pipeline, separate and be sequentially connected in series all the way by steam type absorption heat pump
The once net water return pipeline before condenser is returned after cooling step by step with compression heat pump.
Further, in addition to it is used for the peak load calorifier for heating once net backwater, for vapour system, turbine acting
Steam discharge afterwards also separates leads to peak load calorifier for the heating of heat supply network spike, for heat supply network water system, compressed formula heat pump all the way
The hot net water to be heated up step by step with steam type absorption heat pump, then by entering once net feed pipe after peak load calorifier supplementary heating
Road.
Further, cooling water outlet pipe road is provided with after the condenser of heat supply network water system, in the cooling water water outlet
Pipeline is provided with valve, and cooling water inlet pipe road is provided with before condenser, is provided with the cooling water inlet pipe road and is used to adjust
The valve of system recovery waste heat amount.
Further, exhaust steam pipeline is provided with the exhaust steam inlet tube of condenser, exhaust steam pipeline, which is provided with, to be used to adjust
The valve of system recovery waste heat amount.
Preferably, the Steam Turbine is two groups, including #1 Steam Turbines, #2 Steam Turbines, corresponding condenser are #1
Condenser, #2 condensers, in corresponding vapour system, drawing gas for #1 Steam Turbines and drawing gas respectively by #1 vapour for #2 Steam Turbines
Take turns the jet chimney of unit and the jet chimney of #2 Steam Turbines and meet at steam main through threeway, steam main steams with turbine
Vapour entrance connects, and is drawn gas for turbine supply；Corresponding heat supply network water system, once the once net backwater of net water return pipeline is with bypassing
Water is once divided into two-way after threeway converges after #1 condensers, the heating of #2 condensers, all the way once compressed formula heat pump, steam
After the heating of type absorption heat pump, then enter once net water supply line after peak load calorifier heats, another way enters bypass water system
The Bypass hose road of system, and the once net after steam type absorption heat pump, compression heat pump cooling before return condenser successively
Water return pipeline.
Further, bypass water pump is provided with the bypass water system, providing required circulation for bypass water system moves
Power.The flow of the bypass water pump can adjust, that is, bypasses water-carrying capacity and can adjust.
Preferably, the compression heat pump, steam type absorption heat pump respectively with #1 Steam Turbines, #2 Steam Turbines one by one
Corresponding, i.e. every Steam Turbine is correspondingly arranged a source pump, and the refrigeration side and heating side between two source pumps are respectively
Adopt and be connected serially.
Preferably, Steam Turbine can also be one group or multigroup, and can be wet type cooling unit or indirect air cooling unit.
It is using beneficial effect caused by above-mentioned technical proposal：
1. the characteristics of present invention fully combines steam-powered compression heat pump and steam type absorption heat pump, with rational
Heat pump corresponding to steam pressure driving, realize the cascade utilization compared with high-grade steam acting ability.
2. bypassing water and hot net water using plural serial stage as basic ideas, step cooling and step temperature rising are realized, effectively
Reduction system heat transfer process irreversible loss.
3. combined heat pump is using the form being connected in series, according to evaporating temperature height, hot net water first passes through evaporating temperature
Relatively low heat pump, the condensation temperature for heat pumps at different levels of connecting is reduced, improve the performance of each heat pump of series connection.
4. combined heat pump improves the overall increasing extent of temperature of heat pump by using the form of plural serial stage.Solves steaming
Hair temperature is low, the high heat pump brought of condensation temperature heats up the problem of difficult.
5. for the system of exhaust steam residual heat is individually reclaimed using steam type absorption heat pump, due to combined heat pump
More high-grade steam drive compression heat pump is employed, avoids the waste for acting ability of drawing gas so that in the identical amount of drawing gas
It is lower to reclaim more exhaust steam residual heats, improve system energy efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of step heating means and system that the present invention reclaims exhaust steam of electric power plant waste heat using combined heat pump
(clammy or indirect air cooling system)；
Fig. 2 is the flow chart of step heating means and system that the present invention reclaims exhaust steam of electric power plant waste heat using combined heat pump
(direct air cooling system)；
Wherein：1.#1 Steam Turbines, 2.#2 Steam Turbines, 3.#1 condensers, 4.#2 condensers, 5. compression heat pumps, 6.
Turbine, 7. steam type absorption heat pumps, 8. peak load calorifiers, 9. bypass water pumps, 31.#1 condenser entrances, 32.#1 condensers
Outlet, 41.#2 condenser entrances, the outlet of 42.#2 condensers, 51. compression heat pump evaporators, 52. compressors, 53. compressions
Heat pump condenser, 54. choke valves, 61. turbine steam inlets, 62. turbine exhaust vents, 71. absorption heat pump generators,
72. absorption heat pump absorber, 73. absorption heat pump condensers, 74. absorption heat pump evaporators, 75. solution heat exchangers, 76.
Solution pump, 77. cryogenic fluid pumps, 81. peak load calorifier steam inlets, 82. peak load calorifier hot water inlets, 83. peak load calorifiers heat
Water out, 511. compression heat pump evaporator inlets, 512. compression heat pump evaporator outlets, 531. compression heat pump condensers
Entrance, 532. compression heat pump condensator outlets, 721. absorption heat pump absorber entrances, 722. absorption heat pump absorbers go out
Mouth, 731. absorption heat pump condenser inlets, 732. absorption heat pump condensator outlets, 741. absorption heat pump evaporators enter
Mouthful, 742. absorption heat pump evaporator outlets.
Embodiment
Invention is described in further detail below in conjunction with the accompanying drawings：
The present invention is added using the step heating means and system of combined heat pump recovery exhaust steam of electric power plant waste heat, wherein step
Hot method is to draw gas to drive combining heat pump to reclaim exhaust steam in steam turbine using Steam Turbine high-grade, utilizes combining heat pump
Characteristic carries out step temperature rising to hot net water, carries out step cooling to bypass water, specifically includes below scheme：
1) extract Steam Turbine high-grade to draw gas, driving compression heat pump recovery exhaust steam residual heat, high-grade is drawn gas after acting
Steam discharge continue to drive steam type absorption heat pump recovery exhaust steam residual heat；
2) exhaust steam of Steam Turbine heats up through condenser heat exchange to hot net water, and the hot net water after heating sequentially enters pressure
Contracting formula heat pump, steam type absorption heat pump carry out step temperature rising；
3) using the hot net water in step 2) after condenser exchanges heat as bypass water, steam type absorption type heat is sequentially entered
Pump, compression heat pump again return to condenser after carrying out step cooling and Steam Turbine exhaust steam heat exchange heats up.
Step heating system includes providing the Steam Turbine of exhaust steam, reclaims the condenser of exhaust steam residual heat, utilizes Steam Turbine
High-grade draw gas driving turbine, using turbine driving compression heat pump, done work using turbine after steam discharge drive
Steam type absorption heat pump, the equipment such as the peak load calorifier that is heated to hot net water and the above-mentioned each equipment of connection to reclaim
The vapour system of exhaust steam residual heat, heat supply network water system and bypass water system, each working-flow are as follows：For vapour system, vapour
Wheel unit draws gas into turbine acting driving compression heat pump recovery exhaust steam residual heat, and the steam discharge driving steam type after acting is inhaled
Receipts formula heat pump reclaims exhaust steam residual heat；For heat supply network water system, once net backwater is heated by once net water return pipeline into condenser
Afterwards, compression heat pump heating is first passed through, then enters once net water supply line after being heated up by steam type absorption heat pump；For side
Water passage system, bypass backwater of the water from heat supply network water system of water system is bypassed, the once net backwater of heat supply network water system is by once
After net water return pipeline enters condenser heating, separate be sequentially connected in series all the way by steam type absorption heat pump and compression heat pump by
The once net water return pipeline before condenser is returned after level cooling.
For being changed to take out solidifying Large Steam Turbine Sets by pure condensate, usual extraction pressure is higher.The driving turbine that draws gas does work
, can be with deep exploitation vapour with reference to absorption of the steam type absorption heat pump to exhaust steam for driving compression heat pump to reclaim exhaust steam
Turbine exhaust steam residual heat, improve system entirety efficiency.
It can be one group, two groups for the Steam Turbine (thermal source) in the present invention or multigroup, every group is correspondingly arranged one
Platform condenser, and every Steam Turbine is correspondingly arranged a source pump, the drawing gas of each Steam Turbine merge together for
Each turbine, which provides, drives steam, and the refrigeration side (evaporator) and heating side (condenser) between each source pump respectively use
Series system connects.In addition, the Steam Turbine of the present invention can also use wet type cooling unit or indirect air cooling unit.
Embodiment 1：
As shown in figure 1, the present embodiment utilizes system for clammy or indirect air cooling unit exhaust steam residual heat.Wherein Steam Turbine
It it is two groups, compression heat pump, steam type absorption heat pump correspond with #1 Steam Turbines, #2 Steam Turbines respectively, i.e., every
Steam Turbine is correspondingly arranged a source pump, and the refrigeration side and heating side between two source pumps respectively use series system
Connection.
The type of attachment of vapour system, heat supply network water system and bypass water system is as follows：
To vapour system, the jet chimney P2 of 1 jet chimney P1 and #2 Steam Turbine of #1 Steam Turbines 2 converges through threeway to steam
Vapour main pipe P3, is connected with turbine steam inlet 61, and turbine gland steam exhauster P4 is connected with turbine exhaust vent 62, and by threeway
It is divided into jet chimney P5 and jet chimney P6 two-way, jet chimney P5 enters steam type absorption heat pump generator 71, steam pipe
Road P6 connection peak load calorifiers steam inlet 81.
To heat supply network water system, once net water return pipeline P7 and Bypass hose road P22 converges for hot water pipeline P8, heat through threeway
Waterpipe P8 and cooling water inlet pipe road P23 converge for hot water pipeline P9 through threeway, are connected with #1 condensers entrance 31, #1 condensings
Device outlet 32 is connected with hot water pipeline P10, and hot water pipeline P10 and cooling water outlet pipe road P24 converges for hot water pipeline through threeway
P11, hot water pipeline P11 converge for hot water pipeline P12 with cooling water inlet pipe road P25 through threeway again, with #2 condensers entrance 41
Connection, #2 condensers outlet 42 are connected with hot water pipeline P13, and hot water pipeline P13 and cooling water outlet pipe road P26 converges through threeway
For hot water pipeline P14, hot water pipeline P14 is divided into two-way through threeway again, wherein heat supply network water route enter after hot water pipeline P15 with compression
Formula heat pump condenser entrance 531 is connected, and compression heat pump condensator outlet 532 is connected with hot water pipeline P16, hot water pipeline P16
Steam type absorption heat pump absorber entrance 721 is connected, the outlet 722 of steam type absorption heat pump absorber is absorption with steam type
Heat pump condenser entrance P731 is connected by hot water pipeline P17, steam type absorption heat pump condensator outlet P732 and hot-water line
Road P18 connections, hot water pipeline P18 are connected with peak load calorifier hot water inlet 82, peak load calorifier hot water outlet 83 and once net
Water supply line P19 connections.
To bypassing water system, once net water return pipeline P7 and Bypass hose road P22 converges for hot water pipeline P8, heat through threeway
Pipeline type of attachment is divided into two through threeway again with heat supply network water system, hot water pipeline P14 between waterpipe P8 and hot water pipeline P14
Road, wherein bypass waterway are connected after entering Bypass hose road P20 with steam type absorption heat pump evaporator inlet 741, steam type
Absorption heat pump evaporator outlet 742 is connected with compression heat pump evaporator inlet 511 by Bypass hose road P21, compression
Evaporator with heat pump outlet 512 is connected with Bypass hose road P22, is finally connected with water return pipeline P7.Set on Bypass hose road P22
There is bypass water pump, required circulation power is provided for bypass water system.
Vapour system, heat supply network water system and bypass water system the course of work be respectively：
To vapour system, the steam drawn by #1 steam-turbine units and #2 Steam Turbines is respectively through jet chimney P1 and steam
Pipeline P2 enters steam main P3, and steam is introduced into the acting driving compression heat pump 5 of turbine 6 and reclaims exhaust steam residual heat, works as turbine
After machine exhaust steam pressure reduces to a certain extent, turbine steam discharge enters jet chimney P4, and steam parallel connection is divided into two-way, and a part is steamed
Vapour enters jet chimney P5, and for driving steam type absorption heat pump 7 to reclaim exhaust steam residual heat, another part enters jet chimney
P6, lead to peak load calorifier 8 and heated for heat supply network spike.
To heat supply network water system, once net backwater is with bypassing water respectively after hot water pipeline P7 and hot water pipeline P22 are mixed, warp
Threeway enters hot water pipeline P8, and the hot net water of mixing is sequentially connected in series to be heated by #1 condensers 3, #2 condensers 4, #2 condensers 4
It is two-way, i.e. heat supply network water route and bypass waterway to export hot net water by hot water pipeline P14 to be divided：Wherein, heat supply network water route enters hot-water line
Road P15, still using series system, the condenser 53 of compression heat pump is first passed through, then pass through steam type absorption heat pump absorber
72 and steam type absorption heat pump condenser 73 heat up step by step, finally again by after the supplementary heating of peak load calorifier 8 by once net supply
Water pipe P19 is confessed.
To bypassing water system, once net backwater is with bypassing water respectively after hot water pipeline P7 and hot water pipeline P22 are mixed, warp
Threeway enters hot water pipeline P8, and the hot net water of mixing is sequentially connected in series to be heated by #1 condensers 3, #2 condensers 4, #2 condensers 4
It is two-way, i.e. heat supply network water route and bypass waterway to export hot net water by hot water pipeline P14 to be divided：Wherein, bypass waterway enters bypass water
Pipeline P20, it is sequentially connected in series after being cooled step by step by steam type absorption heat pump evaporator 74 and compression heat pump evaporator 51 and returns
Back-mixing chalaza.
Along heat supply network current direction, each Steam Turbine back pressure raises step by step, now can be by adjusting bypass water-carrying capacity (regulation
Bypass pump capacity) change the outlet temperature for each condenser being connected in series, so as to improve the corresponding each Steam Turbine back of the body
Pressure, and ensure each steam-turbine unit safe operation.
Control valve V2, V4 is provided with cooling water inlet pipe road P23, P25, on cooling water outlet pipe road P24, P26
Provided with control valve V1, V3, by control valve V1, V2, V3, V4 regulating system recovery waste heat amount in system operation, if
All recovery exhaust steam residual heats, valve V1, V2, V3, V4 Close All；If only recovery section exhaust steam residual heat, Open valve V1, V2,
Valve V3, V4 are remained turned-off, and when system radiating ability is inadequate, are all turned on valve V1, V2, V3, V4.
Embodiment 2：
As shown in Fig. 2 the present embodiment utilizes system for Direct Air-cooled Unit exhaust steam residual heat.System body device configuration,
Jet chimney, heat supply network waterpipe and Bypass hose road type of attachment and system operation mode are same as Example 1.Difference
It is in different in both exhaust steam cold end types of attachment：In embodiment 1 unnecessary exhaust steam heat by cooling water by cooling water water outlet
Pipeline P24 and cooling water outlet pipe road P26 take away radiating, and by being provided with the exhaust steam inlet tube of condenser in embodiment 2
Exhaust steam pipeline P27, P28, and control valve V5, V6 regulating system recovery waste heat amount, exhaust steam are set in exhaust steam pipeline P27, P28
Unnecessary exhaust steam is delivered to Air-Cooling Island cooling by pipeline P27, P28, and unnecessary excess heat is taken away by Air-Cooling Island.
By control valve V5, V6 regulating system recovery waste heat amount in operation, if all recovery exhaust steam residual heats, valve V5,
V6 Close Alls；Under normal circumstances, if only recovery section exhaust steam residual heat, Open valve V5, valve V6 are remained turned-off, when system dissipates
When heat energy power is inadequate, valve V5, V6 are all turned on.
Each equipment is described as follows：
1. steam turbine, determined according to the output of cogeneration of heat and power, be common equipment；
2. condenser, being determined according to waste heat recovery volume and heating-up temperature, clammy or indirect air cooling system can use original equipment,
But operational factor must be checked.Direct air cooling system must be newly established, and be non-standard de-sign equipment；
3. turbine, determined according to extracted steam from turbine, steam discharge parameter, be non-standard de-sign equipment；
4. compression heat pump, determined according to back pressure, heating-up temperature, be non-standard de-sign equipment；
5. steam type absorption heat pump, determine that this is non-standard de-sign equipment according to back pressure, heating-up temperature；
It is common equipment 6. peak load calorifier, being determined according to heating-up temperature；
7. bypassing water pump, determined according to bypass flow and resistance, be common equipment.
Claims (10)
- A kind of 1. step heating means that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, it is characterised in that：This method utilizes Steam Turbine high-grade, which is drawn gas, drives combining heat pump to reclaim exhaust steam in steam turbine, using the characteristic of combining heat pump to hot net water Step temperature rising is carried out, step cooling is carried out to bypass water, specifically includes below scheme：1) extract Steam Turbine high-grade draw gas, driving compression heat pump recovery exhaust steam residual heat, high-grade draw gas acting after row Vapour continues to drive steam type absorption heat pump recovery exhaust steam residual heat；2) exhaust steam of Steam Turbine heats up through condenser heat exchange to hot net water, and the hot net water after heating sequentially enters compression Heat pump, steam type absorption heat pump carry out step temperature rising；3) using the hot net water in step 2) after condenser exchanges heat as bypass water, steam type absorption heat pump, pressure are sequentially entered Contracting formula heat pump again returns to condenser and Steam Turbine exhaust steam heat exchange heating after carrying out step cooling.
- 2. utilize the step heating system of combined heat pump recovery exhaust steam of electric power plant waste heat, it is characterised in that：Including providing exhaust steam Steam Turbine, the condenser for reclaiming exhaust steam residual heat, the turbine (6) for driving of being drawn gas using the high-grade of Steam Turbine, using saturating The compression heat pump (5) of flat machine driving, done work using turbine after the steam type absorption heat pump (7) that drives of steam discharge and connection Above-mentioned each equipment with reclaim the vapour system of exhaust steam residual heat, heat supply network water system and bypass water system, wherein：For vapour system, Steam Turbine is drawn gas into turbine acting driving compression heat pump recovery exhaust steam residual heat, acting Steam discharge driving steam type absorption heat pump recovery exhaust steam residual heat afterwards；For heat supply network water system, after once net backwater enters condenser heating by once net water return pipeline (P7), compression is first passed through Formula heat pump heats up, then enters once net water supply line (P19) after being heated up by steam type absorption heat pump；For bypassing water system, bypass backwater of the water from heat supply network water system of water system, the once net of heat supply network water system are bypassed After backwater enters condenser heating by once net water return pipeline (P7), separate and be sequentially connected in series all the way by steam type absorption heat pump The once net water return pipeline (P7) before condenser is returned after cooling step by step with compression heat pump.
- 3. the step heating system according to claim 2 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：Also include being used for the peak load calorifier (8) for heating once net backwater, for vapour system, the steam discharge after turbine acting Also separate and lead to peak load calorifier (8) all the way for the heating of heat supply network spike, for heat supply network water system, compressed formula heat pump and steam The hot net water that type absorption heat pump heats up step by step, then by entering once net water supply line after peak load calorifier (8) supplementary heating (P19)。
- 4. the step heating system according to claim 3 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：Cooling water outlet pipe road is provided with after the condenser of heat supply network water system, valve is provided with the cooling water outlet pipe road, Cooling water inlet pipe road is provided with before condenser, is provided with the cooling water inlet pipe road for regulating system recovery waste heat amount Valve.
- 5. the step heating system according to claim 3 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：Exhaust steam pipeline is provided with the exhaust steam inlet tube of condenser, exhaust steam pipeline, which is provided with, is used for regulating system recovery waste heat amount Valve.
- 6. the step that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump according to any one of claim 2-5 heats system System, it is characterised in that：The Steam Turbine is two groups, including #1 Steam Turbines (1), #2 Steam Turbines (2), corresponding condenser For #1 condensers (3), #2 condensers (4), in corresponding vapour system, #1 Steam Turbines (1) are drawn gas and #2 Steam Turbines (2) Draw gas respectively by the jet chimney (P1) of #1 Steam Turbines (1) and the jet chimney (P2) of #2 Steam Turbines (2) through three direct bank remittance services Together in steam main (P3), steam main (P3) is connected with turbine steam inlet (61), is drawn gas for turbine supply；It is corresponding Heat supply network water system, once the once net backwater of net water return pipeline (P7) is with bypassing water after threeway converges once through #1 condensers (3), it is divided into two-way after #2 condensers (4) heating, all the way once compressed formula heat pump (5), steam type absorption heat pump (7) heating Afterwards, then after peak load calorifier (8) heating once net water supply line (P19) is entered, another way enters the bypass of bypass water system Waterpipe (P20), and successively through steam type absorption heat pump (7), compression heat pump (5) cooling after return condenser before once Net water return pipeline (P7).
- 7. the step heating system according to claim 6 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：Bypass water pump (9) is provided with the bypass water system, required circulation power is provided for bypass water system.
- 8. the step heating means and system according to claim 7 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, It is characterized in that：The flow of the bypass water pump (9) can adjust, that is, bypasses water-carrying capacity and can adjust.
- 9. the step heating system according to claim 6 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：The compression heat pump (5), steam type absorption heat pump (7) respectively with #1 Steam Turbines (1), #2 Steam Turbines (2) one One correspondence, i.e. every Steam Turbine are correspondingly arranged a source pump, and the refrigeration side and heating side between two source pumps are divided equally Do not adopt and be connected serially.
- 10. the step heating system according to claim 6 that exhaust steam of electric power plant waste heat is reclaimed using combined heat pump, its feature It is：Steam Turbine can also be one group or multigroup, and can be wet type cooling unit or indirect air cooling unit.
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Cited By (4)
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| CN112378112A (en) * | 2020-11-10 | 2021-02-19 | 国网天津市电力公司 | Exhaust steam waste heat utilization system and utilization method based on absorption heat pump |
| CN115468333A (en) * | 2022-07-26 | 2022-12-13 | 华能国际电力股份有限公司上海石洞口第二电厂 | Thermal power plant frequency modulation system with steam pressure tank and heat pump |
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| CN107621002A (en) * | 2016-10-09 | 2018-01-23 | 燕山大学 | Utilize the step heating means and system of combined heat pump recovery exhaust steam of electric power plant waste heat |
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