CN202221121U - Water-water heat supply system for recovering waste condensation heat of auxiliary steam turbine of thermal power plant - Google Patents
Water-water heat supply system for recovering waste condensation heat of auxiliary steam turbine of thermal power plant Download PDFInfo
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- CN202221121U CN202221121U CN2011202508439U CN201120250843U CN202221121U CN 202221121 U CN202221121 U CN 202221121U CN 2011202508439 U CN2011202508439 U CN 2011202508439U CN 201120250843 U CN201120250843 U CN 201120250843U CN 202221121 U CN202221121 U CN 202221121U
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Abstract
The utility model relates to a water-water heat supply system for recovering waste condensation heat of an auxiliary steam turbine of a thermal power plant. The water-water heat supply system comprises the auxiliary steam turbine (1), a water-cooled condenser (2), a steam-water heat exchanger (10) and absorption heat pumps (XR1 to n). Each of the absorption heat pumps (XR1 to n) is additionally provided with a supercooler (4), and the heat supply system is additionally provided with two water-water heat exchangers. Heat-supply network return water is divided into two ways before or after entering the first water-water heat exchanger (3), one way of the heat-supply network return water enters an absorber of the first absorption heat pump (XR1) first and then enters an absorber of the second absorption heat pump (XR2), the absorption heat pumps are sequentially connected in series, the heat-supply network return water comes out of an absorber of the nth absorption heat pump (XRn) prior to entering a condenser of the nth absorption heat pump (XRn) and then is sequentially connected in series, the water finally flows out of a condenser of the first absorption heat pump, and the other way of the heat-supply network return water is connected in parallel to enter the supercoolers (4) of the absorption heat pumps. The water-water heat supply system is capable of recovering more waste condensation heat for the thermal power plant, so that operating efficiency of the heat pumps is improved and a heat supply network system is more reliable in operation.
Description
Technical field
The utility model relates to a kind of cogeneration heating system, is applicable to that the auxiliary steam turbine exhaust steam of cogeneration power plant is more energy-conservation, utilizes safely and reliably, and heat network system more utilizes condensation waste heat.
Background technology
Along with the shortage of the energy and the requirement of energy-saving and emission-reduction improve day by day, the comprehensive utilization technique of the energy is in continuous lifting.Urban planning cogeneration in the north carries out central heating, to substitute original independent boiler central heating, realizes the requirement of energy-saving and emission-reduction.Make full use of steam power plant's used heat, to improve the heat capacity of steam power plant, realize energy-saving and emission-reduction better, guarantee the safe and reliable operation of steam power plant and heat supply network simultaneously again, various new flow processs require study.Realize the more auxiliary steam turbine exhaust steam used heat that reclaims in the power plant, the most important condition is that adopting on this basis with the electricity is the source pump of power, or is the absorption type heat pump assembly of power with the heat supply network high-temperature water with the secondary net return water temperature reduction of hot user side.Heat supply network backwater through power plant is confessed carries out refrigeration cool-down, supplies the secondary net to use again as the waste heat source of heat pump, makes the heat supply network return water temperature reduce back telegram in reply factory.Power plant heat supply network backwater is introduced into former plant condenser after getting into power plant, with electric power plant circulating water be blended in heat up in the condenser after, get into absorption heat pump again, see off after in heat pump, heating up.In this system, the temperature that recirculated water goes out heat pump is the keys of heat supply network in many recovery of whole heating season condensation heat, in same outlet temperature, can reclaim more condensation waste heat, and become the another difficult problem of steam power plant's central heating technology with high-grade drawing gas less.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency; A kind of condensation waste heat of realizing reclaiming more steam power plants auxiliary steam turbine is provided, and the operational efficiency of raising heat pump and heat network system be two water ability of swimming heating systems of steam power plant's recovery subsidiary engine condensation waste heat of reliability service more.
The purpose of the utility model is achieved in that a kind of steam power plant reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine, water-cooled condenser, vapor-water heat exchanger, main steam turbine extraction steam pipe and absorption heat pump; Said absorption heat pump has the n platform; N is >=2 natural number, and high steam is extracted the thermal source of part steam as absorption heat pump and vapor-water heat exchanger out in sucking condensing turbine work done generating back.The auxiliary steam turbine exhaust steam condenses into water by condenser, and condensation waste heat is recycled.Said absorption heat pump has additional subcooler; Said heating system increase has two water water-to-water heat exchangers: the first water water-to-water heat exchanger and the second water water-to-water heat exchanger; The heat supply network backwater is divided into the absorber that two tunnel, one road heat supply network backwater is introduced into first absorption heat pump before or after the entering first water water-to-water heat exchanger, the absorber that gets into second absorption heat pump again is connected in series successively; Until the absorber that gets into n platform absorption heat pump; Go out the condenser that gets into this n platform absorption heat pump behind the absorber of n platform absorption heat pump again, be connected in series successively from n-1, n-2 then, from the condenser of first absorption heat pump, flow out at last; Another road heat supply network backwater parallel connection gets into the subcooler of each absorption heat pump; Two road heat supply network backwater merge at last; Directly or again behind vapor-water heat exchanger, see off; The cooling circulating water of said water-cooled condenser is divided into three the tunnel: the one tunnel and is connected with the first water water-to-water heat exchanger, and the second water water-to-water heat exchanger, one side is inserted on another road; The evaporimeter recirculated water of the second water water-to-water heat exchanger opposite side is introduced into the evaporimeter of absorption heat pump; Return successively then; Get into the evaporimeter of second absorption heat pump, first absorption heat pump, after first absorption heat pump flows out, return the second water water-to-water heat exchanger at last; Third Road inserts cooling device.
The utility model steam power plant reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; Described heat supply network backwater gets into and is divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and gets into second water-cooled condenser; Go out the absorber that gets into first absorption heat pump behind second water-cooled condenser again, another road heat supply network backwater do not get into second water-cooled condenser and directly parallel connection get into the subcooler of each absorption heat pump.
The utility model steam power plant reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; Described heat supply network backwater is introduced into second water-cooled condenser after getting into power plant; Go out to be further divided into behind second water-cooled condenser each absorption heat pump of serial connection behind the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump, another road heat supply network backwater parallel connection gets into the subcooler of each absorption heat pump.
The utility model steam power plant reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; The subcooler of said each absorption heat pump is merged into a subcooler; The water as refrigerant pipeline parallel connection of each absorption heat pump inserts the subcooler after this merging, and subcooler and another road heat supply network backwater that the heat supply network backwater goes out after this merging merge at last.
The beneficial effect of the utility model is:
Absorption heat pump in steam power plant has increased when subcooler and two water water-to-water heat exchangers supply heat supply in winter to do heat supply season and has moved.Heat supply network recirculated water and power plant's cool cycles water separation isolated operation.Guaranteed the water quality of hot net water, guaranteed that all kinds of heat transmission equipments can safe and reliable energy-efficient operation.Adopt heat supply network recirculated water directly to reclaim the COP value that the heat pump waste heat has more effectively improved heat pump.The working steam of heat pump will be practiced thrift more than 8% than original system.Because heat pump has been used high-grade energy less in reclaiming steam power plant's condensation waste heat process; So compare with former heat pump; Under the situation that reclaims same condensation waste heat; The temperature that goes out heat pump is lower than originally, can guarantee that so more heat supply network reclaims condenser heat and realizes maximization when heating demand descends, and is utilizing more auxiliary steam turbine exhaust steam to be used for heating in whole heating season.On the other hand, owing to reclaim same condensation heat, the circulating water temperature that goes out heat pump is low, under same outlet temperature situation, and the recyclable more condensation waste heat of heat pump.Through heat supply network recirculated water and cooling circulating water corresponding series flow in the absorber of each heat pump and condenser and evaporimeter, make the performance of heat pump obtain better optimize.The volume of heat pump, weight indicator can descend greatly, and manufacturing cost can descend simultaneously.On the other hand, because the performance optimization of heat pump, each item economic technology economic indicator of steam power plant is further enhanced.
Description of drawings
Fig. 1 (a) divides flow diagram for the heat supply network backwater that the utility model relates to before the first water water-to-water heat exchanger.
Fig. 1 (b) divides flow diagram for the heat supply network backwater that the utility model relates to behind the first water water-to-water heat exchanger.
Reference numeral among the figure:
Auxiliary steam turbine 1, water-cooled condenser 2, the first water water-to-water heat exchanger 3, subcooler 4, evaporator with heat pump circulating water pipe 5, outlet pipe 6, cooling device 7, heat supply network return branch 8, heat supply network return branch 9, vapor-water heat exchanger 10, main steam turbine extraction steam pipe 11, auxiliary steam turbine exhaust steam pipe 12, the second water water-to-water heat exchanger 13, absorption heat pump XR1 ... N.
Heat supply network backwater A, heat supply network water supply A2, main steam turbine draw gas B, high steam C, coagulate water and go out D.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in Fig. 1 (a), Fig. 1 (a) divides flow diagram for the heat supply network backwater that the utility model relates to before the first water water-to-water heat exchanger.Can find out that by Fig. 1 (a) heating system is by auxiliary steam turbine 1, water-cooled condenser 2, the first water water-to-water heat exchanger 3, subcooler 4, evaporator with heat pump circulating water pipe 5, outlet pipe 6, cooling device 7, heat supply network return branch 8, heat supply network return branch 9, vapor-water heat exchanger 10, main steam turbine extraction steam pipe 11, auxiliary steam turbine exhaust steam pipe 12, the second water water-to-water heat exchanger 13, absorption heat pump XR1 ... Compositions such as n and water pump, valve and connecting line.Said absorption heat pump XR1 ... N has the n platform, and n is >=2 natural number.Auxiliary steam turbine 1 exhaust steam inserts water-cooled condenser 2, and the heat supply network backwater is divided into two the tunnel after getting into power plant: heat supply network return branch 8 and heat supply network return branch 9.One road heat supply network return branch 8 gets into the first water water-to-water heat exchanger 3, goes out the absorber that the first water water-to-water heat exchanger, 3 backs get into first absorption heat pump XR1, goes out the absorber that gets into second absorption heat pump XR2 behind the absorber of first absorption heat pump XR1; All the other and the like;, go out the absorber that gets into n platform absorption heat pump XRn behind the absorber of n-1 platform absorption heat pump again, get into the condenser of n platform absorption heat pump XRn again; Get into the condenser of n-1 platform absorption heat pump XR2 then; All the other and the like ..., after the condenser of first absorption heat pump XR1 go out.Just get into the condenser of absorption heat pump XR2 after the minimum absorber from absorption heat pump XR2 of this one road hot net water goes out, go out the condenser that returns absorption heat pump XR1 behind the condenser of absorption heat pump XR2, the condenser from absorption heat pump XR1 goes out at last.This road heat supply network backwater is heated through the first water water-to-water heat exchanger 3; Again through first absorption heat pump XR1, second absorption heat pump XR2 ... The absorber of n platform absorption heat pump XRn add gentle n platform absorption heat pump XRn ... The condenser of second absorption heat pump XR2, first absorption heat pump XR1 is heated, and the heat supply network return water temperature is raise.Another road heat supply network return branch 9 directly parallel connection gets into each absorption heat pump XR1 ... The subcooler 4 of n.Heat exchange heats up in subcooler 4, has taken away the heat of absorption heat pump condensation water as refrigerant, and the heat of the water as refrigerant that the heat pump generator produces has obtained effective utilization.Two road heat supply network backwater merge at last, directly or again after vapor-water heat exchanger 10 heats up, see off.Because water as refrigerant cooling back gets into evaporimeter; Basically eliminated the liquid state loss that water as refrigerant gets into behind the evaporimeter self flash distillation cooling; Make water as refrigerant can all be used for refrigeration, the COP value of heat pump is improved, reached the effect that one action two gets cooling circulating water.The cooling circulating water of the water-cooled condenser 2 of steam power plant is discharged and is divided into three the tunnel; One the tunnel is connected with the first water water-to-water heat exchanger 3; One the tunnel gets into the second water water-to-water heat exchanger, 13 1 sides; Waste heat is provided for the evaporimeter of absorption heat pump, the evaporimeter recirculated water of the second water water-to-water heat exchanger, 13 opposite sides is introduced into the evaporimeter of absorption heat pump XRn, returns successively then; Get into the evaporimeter of second absorption heat pump XR2, first absorption heat pump XR1, heat again from returning the second water water-to-water heat exchanger 13 after first absorption heat pump XR1 flows out at last.Third Road outlet pipe 6 enters atmosphere to unnecessary heat through cooling device 7.In this system heat supply network recirculated water and evaporimeter recirculated water two at the most the series flow in the platform heat pump make the performance of heat pump obtain optimization, each item technical-economic index of power plant's cogeneration operation is further improved.
Shown in Fig. 1 (b), Fig. 1 (b) divides flow diagram for the heat supply network backwater that the utility model relates in the first water water-to-water heat exchanger, 3 backs.Fig. 1 (b) is behind the first water water-to-water heat exchanger 3, to be divided into two the tunnel after the heat supply network backwater gets into power plant with Fig. 1 (a) difference.
Described heat supply network backwater also can carry out heat exchange with a shared subcooler (not drawing among the figure) of many heat pumps.The water as refrigerant pipeline of each heat pump (not drawing among the figure) is connected in parallel with subcooler, through backheat pump after the subcooler heat release.After heating up in subcooler, the heat supply network backwater merges with another road.
Claims (4)
1. a steam power plant reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine (1), water-cooled condenser (2), vapor-water heat exchanger (10), main steam turbine extraction steam pipe (11) and absorption heat pump (XR1 ... N); Said absorption heat pump (XR1 ... N) the n platform is arranged; N is >=2 natural number; It is characterized in that: said absorption heat pump (XR1 ... N) have additional subcooler (4), said heating system increase has two water water-to-water heat exchangers: the first water water-to-water heat exchanger (3) and the second water water-to-water heat exchanger (13), and the heat supply network backwater is divided into two the tunnel before or after the entering first water water-to-water heat exchanger (3); One road heat supply network backwater is introduced into the absorber of first absorption heat pump (XR1); The absorber that gets into second absorption heat pump (XR2) again is connected in series successively, until the absorber that gets into n platform absorption heat pump (XRn), goes out the condenser that gets into this n platform absorption heat pump (XRn) behind the absorber of n platform absorption heat pump (XRn) again; Be connected in series successively from n-1, n-2 then, from the condenser of first absorption heat pump (XR1), flow out at last; Another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (4); Two road heat supply network backwater merge at last; Directly or again behind vapor-water heat exchanger (10), see off, the cooling circulating water of said water-cooled condenser (2) is divided into three the tunnel: the one tunnel and is connected with the first water water-to-water heat exchanger (3); The second water water-to-water heat exchanger (13) one sides are inserted on another road; The evaporimeter recirculated water of second water water-to-water heat exchanger (13) opposite side is introduced into the evaporimeter of absorption heat pump (XRn); Return successively then; Get into the evaporimeter of second absorption heat pump (XR2), first absorption heat pump (XR1), after first absorption heat pump (XR1) flows out, return the second water water-to-water heat exchanger (13) at last; Third Road inserts cooling device (7).
2. a kind of steam power plant according to claim 1 reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; It is characterized in that: described heat supply network backwater gets into and is divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and gets into second water-cooled condenser (3); Go out the absorber that gets into first absorption heat pump (XR1) behind second water-cooled condenser (3) again, another road heat supply network backwater do not get into second water-cooled condenser (3) and directly parallel connection get into each absorption heat pump (XR1 ... N) subcooler (4).
3. a kind of steam power plant according to claim 1 reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; It is characterized in that: described heat supply network backwater is introduced into second water-cooled condenser (3) after getting into power plant; Go out to be further divided into behind second water-cooled condenser (3) serial connection each absorption heat pump (XRn) behind the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump (XR1), another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (4).
4. a kind of steam power plant according to claim 1 and 2 reclaims two water ability of swimming heating systems of subsidiary engine condensation waste heat; It is characterized in that: said each absorption heat pump (XR1 ... N) subcooler (4) is merged into a subcooler; Each absorption heat pump (XR1 ... N) water as refrigerant pipeline parallel connection inserts the subcooler after this merging, and subcooler and another road heat supply network backwater that the heat supply network backwater goes out after this merging merge at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202508439U CN202221121U (en) | 2011-07-16 | 2011-07-16 | Water-water heat supply system for recovering waste condensation heat of auxiliary steam turbine of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202508439U CN202221121U (en) | 2011-07-16 | 2011-07-16 | Water-water heat supply system for recovering waste condensation heat of auxiliary steam turbine of thermal power plant |
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| Publication Number | Publication Date |
|---|---|
| CN202221121U true CN202221121U (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202508439U Withdrawn - After Issue CN202221121U (en) | 2011-07-16 | 2011-07-16 | Water-water heat supply system for recovering waste condensation heat of auxiliary steam turbine of thermal power plant |
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| CN (1) | CN202221121U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338411A (en) * | 2011-07-16 | 2012-02-01 | 双良节能系统股份有限公司 | Double-water type heat supply system for recovering condensed waste heat of auxiliary steam turbine in thermal power plant |
-
2011
- 2011-07-16 CN CN2011202508439U patent/CN202221121U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338411A (en) * | 2011-07-16 | 2012-02-01 | 双良节能系统股份有限公司 | Double-water type heat supply system for recovering condensed waste heat of auxiliary steam turbine in thermal power plant |
| CN102338411B (en) * | 2011-07-16 | 2013-05-01 | 双良节能系统股份有限公司 | Double-water type heat supply system for recovering condensed waste heat of auxiliary steam turbine in thermal power plant |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120516 Effective date of abandoning: 20130501 |
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| RGAV | Abandon patent right to avoid regrant |