CN105823111B - Steam exhaust waste heat recovery system based on unit wet cooling unit - Google Patents

Steam exhaust waste heat recovery system based on unit wet cooling unit Download PDF

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Publication number
CN105823111B
CN105823111B CN201610344158.XA CN201610344158A CN105823111B CN 105823111 B CN105823111 B CN 105823111B CN 201610344158 A CN201610344158 A CN 201610344158A CN 105823111 B CN105823111 B CN 105823111B
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valve
water
steam
condenser
unit
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CN105823111A (en
Inventor
李岩
马懿峰
张淑彦
贾星桥
李文涛
李�杰
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Yanshan University
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Yanshan University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • 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]
    • Y02B30/62—Absorption based systems
    • Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/14—Combined heat and power generation [CHP]
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention discloses a steam exhaust waste heat recovery system based on a unit wet cooling unit. The system comprises a steam turbine unit, a steam condenser, a cooling tower, a circulating water pump, a water/water heat exchanger, a circulating water system, a heat pump and a heating network heater, wherein the circulating water system includes a heating network water pipeline, a bypass water pipeline and a mixed water pipeline; the bypass water pipeline is connected with bypass water and heating network return water; and the water/water heat exchanger is connected with steam condenser circulating water and cooling tower circulating water. The invention aims to propose the novel steam exhaust waste heat recovery system for the unit wet cooling unit, can organically combine a low vacuum technology with a heat pump technology, realizes deep utilization of steam exhaust waste heat of the steam turbine, and prominently improves the energy utilization efficiency of the steam turbine.

Description

A kind of exhaust steam residual heat recovery system based on unit style wet type cooling unit
Technical field
The invention belongs to residual heat of electric power plant reclaims field, more particularly to a kind of exhaust steam residual heat based on unit style wet type cooling unit is returned Receipts system.
Background technology
In China, fossil-fired unit accounts for more than the 70% of generator installation total capacity, and exhaust steam residual heat recovery technology can be reduced Even avoid because of steam turbine cold source energy caused by pure condensate thermal power generation, improve steam turbine efficiency of energy utilization, therefore become one The important power-saving technology of item.
In existing exhaust steam in steam turbine heat recovery technology, low-vacuum-operating technology is received significant attention with heat pump techniques： Low-vacuum-operating technical requirements greatly improve unit back pressuce, thereby result in steam turbine last stage volume flow degradation, threaten machine The operation safety of group, or even need to change final stage rotor under supplying thermal condition, thus make troubles to unit operation, it is difficult electric Factory receives；The essence of heat pump techniques is, using the acting ability resided in drawing gas, to drive inverse Carnot cycle weary to reclaim low temperature Vapour waste heat, although the technology can significantly improve system energy utilization rate, but heat pump investment is high, take up an area space greatly, riding position It is limited（For ease of waste heat extraction, it is necessary to be placed near steamer machine room A row outer circulation waterpipes）, it is not easy to power plant's planning and changes Make.
The content of the invention
The purpose of the present invention is for unit style wet type cooling unit, to propose a kind of new exhaust steam residual heat recovery system, can be by Low vacuum level technique is organically combined with heat pump techniques, realizes exhaust steam in steam turbine waste heat deep exploitation, significantly improves the energy of steam turbine Utilization ratio.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of exhaust steam residual heat recovery system based on unit style wet type cooling unit of the present invention, including the first steam-turbine unit and the Two steam-turbine units, also including heat supply network water return pipeline P1, Bypass hose road P3 and mixed water conduit P2, the heat supply network water return pipeline P1 merges access mixed water conduit P2 with Bypass hose road P3；
First steam-turbine unit and the second steam-turbine unit are respectively connected to mixed water conduit P2；
Again Jing distributing T-pipes are first to mixed water conduit P2 Jing after the first steam-turbine unit and the second steam-turbine unit Pipeline and the second pipeline；
Also include absorption heat pump, the absorption heat pump includes absorber A, condenser C, vaporizer E and generator G； The pipeline Jing evaporators with heat pump E accesses Bypass hose road P3；The pipeline Jing heat pump condenser C, absorber A are linked into heat supply network The water side entrance of heater；The water side outlet of the heat exchangers for district heating is linked into heat supply network water supply line P9；
The first pipeline Jing evaporators with heat pump E accesses Bypass hose road P3；The second pipeline Jing heat pump condenser C, Absorber A is linked into the water side entrance of heat exchangers for district heating；The water side outlet of the heat exchangers for district heating is linked into heat supply network water supply line P9；
First steam-turbine unit and the second steam-turbine unit difference Jing extracted steam from turbine pipeline P6 and extracted steam from turbine Pipeline P7 merges access and draws gas main pipeline P8, and the main pipeline P8 Jing threeways of drawing gas are respectively connected to the vapour of the heat exchangers for district heating Side entrance and the heat pump generator G；
First steam-turbine unit includes condenser and cooling tower, is provided between the condenser and the cooling tower Water/water- to-water heat exchanger, the port of export of the condenser connects the first entrance point of the water/water- to-water heat exchanger by valve K1, described The entrance point of the valve K2 and valve K3 connection condenser that the first outlet end of water/water- to-water heat exchanger passes through series connection, the water/ The second outlet end of water- to-water heat exchanger connects the entrance point of cooling tower by valve K4, and the port of export of the cooling tower passes through valve K5 Connect the second entrance point of the water/water- to-water heat exchanger；Pipeline between the valve K4 and the entrance point of the cooling tower passes through Pipeline connection between valve K6 and the valve K1 and the port of export of the condenser, the valve K5 goes out with the cooling tower Pipeline between mouth end is by the pipeline connection between valve K7 and the valve K2 and valve K3；The valve K1 is solidifying with described Pipeline between the port of export of vapour device is by the pipeline connection between valve K8 and the valve K2 and the valve K3；The valve The pipeline at door K3 two ends is respectively by the pipeline at the valve K11 two ends in valve K9 and valve K10 and mixed water conduit P2 Connection；Above-mentioned various connections pass through pipeline connection；
First steam-turbine unit is identical with the structure and annexation of second steam-turbine unit, but runs Parameter is different.
Preferably, it is provided with circulating pump between the valve K4 and the cooling tower.
Preferably, it is provided with circulating pump on the heat supply network water return pipeline P1.
Preferably, the absorption heat pump is lithium bromide absorption type heat pump.
Compared with prior art, Advantageous Effects of the invention：Bypass water is set and increased turbine condenser water inlet Flow, it is possible to decrease the water side temperature rise of condenser, both avoided unit back pressuce increases substantially the wind for affecting unit rotor safety Danger, while also solving the problems, such as that heat pump riding position is limited, is conducive to power plant to plan and transform；Exhaust steam residual heat is mainly by mixed Heshui is realized reclaiming with condenser direct heat transfer, drastically reduce the area heat pump and arranges capacity, solves heat pump and invests big, running cost With height, take up an area the big problem in space, improve the exploitativeness of heat pump techniques；Set up water/water between condenser and cooling tower to change Hot device, it is to avoid pollution of the open cooling tower to heat supply network water quality during delayed heat was discharged.
Description of the drawings
Below in conjunction with the accompanying drawings the invention will be further described for explanation.
Fig. 1 is a kind of schematic diagram of the exhaust steam residual heat recovery system based on unit style wet type cooling unit of the present invention；
Description of reference numerals：The steam-turbine units of 1- first；2- circulating pumps；3- condensers；The 31- ports of export；32- entrance points； 4- cooling towers；5- water/water- to-water heat exchanger；The entrance points of 51- first；52- first outlets end；53- second outlets end；The imports of 54- second End；6- absorption heat pumps；61st, 62- pipelines；7- heat exchangers for district heatings；71- water side entrance；72- water side outlets；73- vapour side entrance； K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11- valve；P1- heat supply network water return pipelines；P2- mixed water conduits；P3- is bypassed Waterpipe；P4, P5- exhaust equipment of LP casing road；P6, P7- extracted steam from turbine pipeline；P8- draws gas main pipeline；P9- heat supply network feed pipes Road；A- absorbers；C- condensers；E- vaporizers；G- generators；1 '-the second steam-turbine unit；3 '-condenser；31 '-outlet End；32 '-entrance point；4 '-cooling tower；5 '-water/water- to-water heat exchanger；51 '-the first entrance points；52 '-first outlet end；53 '-the second The port of export；54 '-the second entrance points；K1 ', K2 ', K3 ', K4 ', K5 ', K6 ', K7 ', K8 ', K9 ', K10 ', K11 '-valve；8、 8 '-four-way.
Specific embodiment
As shown in figure 1, a kind of exhaust steam residual heat recovery system based on unit style wet type cooling unit, including the first steam-turbine unit 1 and second steam-turbine unit 1 ', also including heat supply network water return pipeline P1, Bypass hose road P3 and mixed water conduit P2, the heat supply network Water return pipeline P1 merges access mixed water conduit P2 with Bypass hose road P3；
The steam-turbine unit 1 ' of first steam-turbine unit 1 and second is respectively connected to mixed water conduit P2；
Again Jing distributing T-pipes are the first pipeline 61 to mixed water conduit P2 Jing after steam-turbine unit 1 and steam-turbine unit 1 ' With the second pipeline 62；
Also include absorption heat pump 6, the absorption heat pump 6 includes absorber A, condenser C, vaporizer E and generator G；
The Jing evaporators with heat pump E of first pipeline 61 accesses Bypass hose road P3；The Jing heat pumps of second pipeline 62 are condensed Device C, absorber A are linked into the water side entrance 71 of heat exchangers for district heating 7；The water side outlet 72 of the heat exchangers for district heating 7 is linked into heat Net water supply line P9；
The steam-turbine unit 1 ' of first steam-turbine unit 1 and second respectively take out by Jing extracted steam from turbines pipeline P6 and steam turbine Steam pipe road P7 merges access and draws gas main pipeline P8, and respectively Jing threeways are linked into the heat exchangers for district heating 7 to the main pipeline P8 that draws gas Vapour side entrance 73 and the heat pump generator G；
First steam-turbine unit 1 includes condenser 3 and cooling tower 4, between the condenser 3 and the cooling tower 4 Water/water- to-water heat exchanger 5 is provided with, the port of export 31 of the condenser 3 connects the first of the water/water- to-water heat exchanger 5 by valve K1 Entrance point 51, the first outlet end 52 of the water/water- to-water heat exchanger 5 connects the condenser by the valve K2 and valve K3 of series connection 3 entrance points 32, the second outlet end 53 of the water/water- to-water heat exchanger 5 connects the entrance point 41 of cooling tower 4 by valve K4, described The port of export 42 of cooling tower 4 connects the second entrance point 54 of the water/water- to-water heat exchanger 5, the valve K4 and institute by valve K5 State pipeline between the entrance point 41 of cooling tower 4 by the port of export 31 of the valve K6 and valve K1 and the condenser 3 it Between pipeline connection, the pipeline between the valve K5 and the port of export 42 of the cooling tower 4 pass through the valve K7 and valve K2 And the pipeline connection between valve K3；Pipeline between the valve K1 and the port of export 31 of the condenser 3 passes through valve K8 With the pipeline connection between the valve K2 and the valve K3；The pipeline at the valve K3 two ends is respectively by valve K9 and valve The pipeline connection at the valve K11 two ends in door K10 and mixed water conduit P2, above-mentioned various connections pass through pipeline connection；
First steam-turbine unit 1 is identical with the structure and annexation of second steam-turbine unit 1 '（But Operational factor is different）, i.e., described second steam-turbine unit 1 ' includes condenser 3 ' and cooling tower 4 ', the condenser 3 ' and described Be provided with water/water- to-water heat exchanger 5 ' between cooling tower 4 ', the port of export 31 ' of the condenser 3 ' by valve K1 ' connect the water/ First entrance point 51 ' of water- to-water heat exchanger 5 ', the first outlet end 52 ' of the water/water- to-water heat exchanger 5 ' by the valve K2 ' that connects and Valve K3 ' connects the entrance point of condenser 3 ' 32 ', and the second outlet end 53 ' of the water/water- to-water heat exchanger 5 ' is by valve K4 ' The entrance point 41 ' of connection cooling tower 4 ', the port of export 42 ' of the cooling tower 4 ' connects the water/water- to-water heat exchanger by valve K5 ' 5 ' the second entrance point 54 '；Pipeline between the valve K4 ' and the entrance point 41 ' of the cooling tower 4 ' by valve K6 ' with Pipeline connection between the valve K1 ' and the port of export 31 ' of the condenser 3 ', the valve K5 ' and the cooling tower 4 ' Pipeline between the port of export 42 ' is by the pipeline connection between valve K7 ' and the valve K2 ' and valve K3 '；The valve Pipeline between K1 ' and the port of export 31 ' of the condenser 3 ' by valve K8 ' and the valve K2 ' and the valve K3 ' it Between pipeline connection；The pipeline at the valve K3 ' two ends is respectively by valve K9 ' and valve K10 ' and the mixed water conduit The pipeline connection at the valve K11 ' two ends on P2 ', above-mentioned various connections pass through pipeline connection.
Connection is realized by four-way 8 between K2, K3, K8 and K10, it is real by four-way 8 ' between K2 ', K3 ', K8 ' and K10 ' Now connect.
In the present embodiment, between the valve K4 and the cooling tower 4 circulating pump is provided with（The valve K4 ' with it is described Circulating pump is provided between cooling tower 4 '）, on the heat supply network water return pipeline P1 circulating pump 2 is provided with；Absorption heat pump 6 is bromination Lithium-absorbing formula heat pump；Condenser（3,3 '）Pass through turbine low pressure cylinder blow-off line respectively（P4, P5）Connect described first respectively The steam turbine of steam-turbine unit 1 and second steam-turbine unit 1 '.
The course of action of the present invention is as follows：
When system works, heat supply network backwater is passed through successively the first steam-turbine unit 1 and the second steam turbine after mixing with bypass water The condenser of unit 1 '（3,3’）Carry out step series connection heating, final stage condenser（3’）The mixing water Jing threeways of outflow are in former ratio Split into pipeline（61,62）：Bypass water Jing Bypass hoses road after evaporator with heat pump E coolings Jing the first pipeline 61（P3）Again with Heat supply network backwater mixes；Hot net water is by heat pump condenser C, absorber A heat temperature raisings, then is heated to supplying by heat exchangers for district heating 7 Coolant-temperature gage enters heat supply network water supply line P9.
In addition, steam turbine operation operating mode is divided into waste heat recovery operating mode and pure condensate operating mode, wherein waste heat recovery operating mode is divided into entirely Waste heat recovery operating mode in portion's reclaims operating mode with part of waste heat.Concrete operating mode is as follows：
Under whole waste heat recovery operating modes：Close the valve of the first steam-turbine unit 1（K1, K2, K3, K4, K5, K6, K7, K11）With the valve of the second steam-turbine unit 1 '（K1 ', K2 ', K3 ', K4 ', K5 ', K6 ' and, K7 ', K11 '）, and open the first steamer The valve of machine unit 1（K8, K9, K10）With the valve of the second steam-turbine unit 1 '（K8 ', K9 ', K10 '）, cooling tower（4,4 '）Stop Operation, mixing water absorbs unit whole exhaust steam residual heat by the condenser 3 that valve K9 enters the first steam-turbine unit 1, after intensification Mixing water Jing valves（K8、K10）Into mixed water conduit P2, then the second steam-turbine unit 1 ' is entered further through valve K9 ' Condenser 3 ' absorb unit whole exhaust steam residual heat, the mixing water Jing valves after intensification（K8’、K10’）Into mixed water conduit P2 End；
Reclaim under operating mode in part of waste heat：Close the valve of the first steam-turbine unit 1（K3, K6, K7, K8, K11）With second The valve of steam-turbine unit 1 '（K3 ', K6 ', K7 ', K8 ', K11 '）, and open the valve of the first steam-turbine unit 1（K1, K2, K4, K5, K9, K10）With the valve of the second steam-turbine unit 1 '（K1 ', K2 ', K4 ', K5 ', K9 ', K10 '）, cooling tower（4,4 '） Operation, mixing water absorbs unit whole exhaust steam residual heat by the condenser 3 that valve K9 enters the first steam-turbine unit 1, after intensification Mixing water Jing valves K1 enter the first entrance point of water/water- to-water heat exchanger 51, discharge part of waste heat, then through first outlet end 52, Valve（K2, K10）Into mixed water conduit, while cooling-tower circulating water Jing valves K5 enters the entrance point of water/water- to-water heat exchanger second 54, waste heat is absorbed, then cooling tower 4 is entered through second outlet end 53, valve K4 and discharge waste heat；First steam-turbine unit 1 The mixing water of outflow absorbs unit whole exhaust steam residual heat by the condenser 3 ' that valve K9 ' enters the second steam-turbine unit 1 ', rises Mixing water Jing valves K1 ' after temperature enters the entrance point 51 ' of water/water- to-water heat exchanger first, discharges part of waste heat, then through first outlet End 52 ', valve（K2 ', K10 '）Into mixed water conduit P2, while cooling-tower circulating water Jing valves K5 ' enters water/water- to-water heat exchanger Second entrance point 54 ', absorbs waste heat, then enters cooling tower 4 ' through second outlet end 53 ', valve K4 ' and discharge waste heat.
Under pure condensate operating mode：Close the valve of the first steam-turbine unit 1（K1, K2, K4, K5, K8, K9, K10, K11）With The valve of two steam-turbine units 1 '（K1 ', K2 ', K4 ', K5 ', K8 ', K9 ', K10 ', K11 '）, and open the first steam-turbine unit 1 Valve（K3, K6, K7）With the valve of the second steam-turbine unit 1 '（K3 ', K6 ', K7 '）, the condenser of the first steam-turbine unit 1 Recirculated water absorbs whole exhaust steam residual heats into condenser 3, and the condenser recirculated water Jing valves K6 after intensification enters cooling tower 4, row Whole waste heats are put, then through valve（K7, K3）It is back to condenser 3.The condenser recirculated water of the second steam-turbine unit 2 enters solidifying Vapour device 3 ' absorbs whole exhaust steam residual heats, and the condenser recirculated water Jing valves K6 ' after intensification enters cooling tower 4 ', and discharge is all remaining Heat, then through valve（K7 ', K3 '）Condenser 3 ' is back to, hot net water does not pass through condenser（3,3 '）, two steam-turbine units Independent operating.
Embodiment described above is only that the optimal way to the present invention is described, and not the scope of the present invention is carried out Limit, on the premise of without departing from design spirit of the present invention, those of ordinary skill in the art make to technical scheme Various modifications and improvement, all should fall into claims of the present invention determination protection domain in.

Claims (4)

1. a kind of exhaust steam residual heat recovery system based on unit style wet type cooling unit, including the first steam-turbine unit（1）With the second vapour Turbine unit（1’）, it is characterised in that：
Also include heat supply network water return pipeline（P1）, Bypass hose road（P3）And mixed water conduit（P2）, the heat supply network water return pipeline （P1）With Bypass hose road（P3）Merge and access mixed water conduit（P2）；
First steam-turbine unit（1）With the second steam-turbine unit（1’）It is respectively connected to mixed water conduit（P2）；
The mixed water conduit（P2）The steam-turbine units of Jing first（1）With the second steam-turbine unit（1’）Afterwards again Jing distributing T-pipes are First pipeline（61）With the second pipeline（62）；
Also include absorption heat pump（6）, the absorption heat pump（6）Including absorber（A）, condenser（C）, vaporizer（E）With Generator（G）；
First pipeline（61）Jing evaporators with heat pump（E）Access Bypass hose road（P3）；Second pipeline（62）Jing heat pumps Condenser（C）, absorber（A）It is linked into heat exchangers for district heating（7）Water side entrance（71）；The heat exchangers for district heating（7）Water side Outlet (72) is linked into heat supply network water supply line（P9）；
First steam-turbine unit（1）With the second steam-turbine unit（1’）Difference Jing the first extracted steam from turbine pipelines（P6）With Two steam turbine extraction lines（P7）Merge access to draw gas main pipeline（P8）, the main pipeline that draws gas（P8）Jing threeways are respectively connected to The heat exchangers for district heating（7）Vapour side entrance（73）With the heat pump generator（G）；
First steam-turbine unit（1）Including condenser A（3）With cooling tower A（4）, the condenser A（3）With the cooling Tower A（4）Between be provided with water/water- to-water heat exchanger（5）, the condenser A（3）The port of export（31）By the first valve A（K1）Even Connect the water/water- to-water heat exchanger（5）The first entrance point（51）, the water/water- to-water heat exchanger（5）First outlet end（52）By string Second valve A of connection（K2）With the 3rd valve A（K3）Connect the condenser A（3）Entrance point（32）, the water/water- to-water heat exchanger （5）Second outlet end（53）By the 4th valve A（K4）Connection cooling tower A（4）Entrance point（41）, the cooling tower A（4） The port of export（42）By the 5th valve A（K5）Connect the water/water- to-water heat exchanger（5）The second entrance point（54）；Described 4th Valve A（K4）With the cooling tower A（4）Entrance point（41）Between pipeline pass through the 6th valve A（K6）With first valve Door A（K1）With the condenser A（3）The port of export（31）Between pipeline connection, the 5th valve A（K5）With the cooling Tower A（4）The port of export（42）Between pipeline pass through the 7th valve A（K7）With the second valve A（K2）With the 3rd valve A（K3） Between pipeline connection；The first valve A（K1）With the condenser A（3）The port of export（31）Between pipeline by the Eight valve A（K8）With the second valve A（K2）With the 3rd valve A（K3）Between pipeline connection；The 3rd valve A （K3）The pipeline at two ends passes through respectively the 9th valve A（K9）With the tenth valve A（K10）With the mixed water conduit（P2）On 11 valve A（K11）The pipeline connection at two ends；
First steam-turbine unit（1）With second steam-turbine unit（1’）Structure it is identical with annexation；
By first steam-turbine unit（1）With second steam-turbine unit（1’）Combine and assemble, constitute the waste heat of steam turbine Operating mode and pure condensate operating mode are reclaimed, wherein waste heat recovery operating mode is divided into whole waste heat recovery operating modes with part of waste heat recovery operating mode；
Under whole waste heat recovery operating modes：Close the first steam-turbine unit（1）The first valve A（K1）, the second valve A （K2）, the 3rd valve A（K3）, the 4th valve A（K4）, the 5th valve A（K5）, the 6th valve A（K6）, the 7th valve A（K7）, 11 valve A（K11）With the second steam-turbine unit（1’）The first valve B（K1’）, the second valve B（K2’）, the 3rd valve B （K3’）, the 4th valve B（K4’）, the 5th valve B（K5’）, the 6th valve B（K6’）, the 7th valve B（K7’）, the 11st valve B （K11’）, and open the first steam-turbine unit（1）8th valve A（K8）, the 9th valve A（K9）, the tenth valve A（K10）With Two steam-turbine units（1’）The 8th valve B（K8’）, the 9th valve B（K9’）, the tenth valve B（K10’）, cooling tower A（4）, it is cold But tower B（4’）Out of service, mixing water passes through the 9th valve A（K9）Into the first steam-turbine unit（1）Condenser A（3）Inhale Receive unit whole exhaust steam residual heat, the valve A of mixing water Jing the 8th after intensification（K8）, the tenth valve A（K10）Into mixed water conduit （P2）, then further through the 9th valve B（K9’）Into the second steam-turbine unit（1’）Condenser B（3’）Absorb unit whole Exhaust steam residual heat, the valve B of mixing water Jing the 8th after intensification（K8’）, the tenth valve B（K10’）Into mixed water conduit（P2）End End；
The part of waste heat is reclaimed under operating mode：Close the first steam-turbine unit（1）The 3rd valve A（K3）, the 6th valve A （K6）, the 7th valve A（K7）, the 8th valve A（K8）, the 11st valve A（K11）With the second steam-turbine unit（1’）The 3rd valve Door B（K3’）, the 6th valve B（K6’）, the 7th valve B（K7’）, the 8th valve B（K8’）, the 11st valve B（K11’）, and beat Open the first steam-turbine unit（1）The first valve A（K1）, the second valve A（K2）, the 4th valve A（K4）, the 5th valve A（K5）、 9th valve A（K9）, the tenth valve A（K10）With the second steam-turbine unit（1’）The first valve B（K1’）, the second valve B （K2’）, the 4th valve B（K4’）, the 5th valve B（K5’）, the 9th valve B（K9’）, the tenth valve B（K10’）, cooling tower A （4）, cooling tower B（4’）Operation, mixing water passes through the 9th valve A（K9）Into the first steam-turbine unit（1）Condenser A（3） Absorb unit whole exhaust steam residual heat, mixing water Jing the first valve A after intensification（K1）Into the entrance point of water/water- to-water heat exchanger first （51）, part of waste heat is discharged, then through first outlet end（52）, the second valve A（K2）, the tenth valve A（K10）Into mixing water Pipeline, while the valve A of cooling-tower circulating water Jing the 5th（K5）Into the entrance point of water/water- to-water heat exchanger second（54）, waste heat is absorbed, then Through second outlet end（53）, the 4th valve A（K4）Into cooling tower A（4）Discharge waste heat；First steam-turbine unit（1） The mixing water of outflow passes through the 9th valve B（K9’）Into the second steam-turbine unit（1’）Condenser B（3’）Absorb unit whole Exhaust steam residual heat, mixing water Jing the first valve B after intensification（K1’）Into the entrance point of water/water- to-water heat exchanger first（51’）, release portion Divide waste heat, then through first outlet end（52’）, the second valve B（K2’）, the tenth valve B（K10’）Into mixed water conduit （P2）, while the valve B of cooling-tower circulating water Jing the 5th（K5’）Into the entrance point of water/water- to-water heat exchanger second（54’）, waste heat is absorbed, Again through second outlet end（53’）, the 4th valve B（K4’）Into cooling tower B（4’）Discharge waste heat；
Under the pure condensate operating mode：Close the first steam-turbine unit（1）The first valve A（K1）, the second valve A（K2）, the 4th valve Door A（K4）, the 5th valve A（K5）, the 8th valve A（K8）, the 9th valve A（K9）, the tenth valve A（K10）, the 11st valve A （K11）With the second steam-turbine unit（1’）Valve the first valve B（K1’）, the second valve B（K2’）, the 4th valve B（K4’）, Five valve B（K5’）, the 8th valve B（K8’）, the 9th valve B（K9’）, the tenth valve B（K10’）, the 11st valve B（K11’）, And open the first steam-turbine unit（1）The 3rd valve A（K3）, the 6th valve A（K6）, the 7th valve A（K7）With the second steamer Machine unit（1’）The 3rd valve B（K3’）, the 6th valve B（K6’）, the 7th valve B（K7’）, the first steam-turbine unit（1）'s Condenser recirculated water enters condenser A（3）Absorb whole exhaust steam residual heats, the valve A of condenser recirculated water Jing the 6th after intensification （K6）Into cooling tower A（4）, the whole waste heats of discharge, then through the 7th valve A（K7）, the 3rd valve A（K3）It is back to condenser A（3）；The condenser recirculated water of the second steam-turbine unit enters condenser B（3’）Absorb whole exhaust steam residual heats, the condensing after intensification The valve B of device recirculated water Jing the 6th（K6’）Into cooling tower B（4’）, the whole waste heats of discharge, then through the 7th valve B（K7’）, Three valve B（K3’）It is back to condenser B（3’）, hot net water is by condenser A（3）, condenser B（3’）, two steam turbine machines Group independent operating.
2. the exhaust steam residual heat recovery system based on unit style wet type cooling unit according to claim 1, it is characterised in that：It is described 4th valve A（K4）With the cooling tower A（4）Between be provided with circulating pump.
3. the exhaust steam residual heat recovery system based on unit style wet type cooling unit according to claim 1, it is characterised in that：It is described Heat supply network water return pipeline（P1）On be provided with circulating pump（2）.
4. the exhaust steam residual heat recovery system based on unit style wet type cooling unit according to claim 1, it is characterised in that：It is described Absorption heat pump（6）For lithium bromide absorption type heat pump.
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