CN203745866U - Thermal power plant circulating water system - Google Patents

Thermal power plant circulating water system Download PDF

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Publication number
CN203745866U
CN203745866U CN201320882005.2U CN201320882005U CN203745866U CN 203745866 U CN203745866 U CN 203745866U CN 201320882005 U CN201320882005 U CN 201320882005U CN 203745866 U CN203745866 U CN 203745866U
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CN
China
Prior art keywords
water
recirculated water
valve
recirculated
cooling tower
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Expired - Fee Related
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CN201320882005.2U
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Chinese (zh)
Inventor
万逵芳
赵文波
孙英博
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Datang Northeast Electric Power Test and Research Institute Co Ltd
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China Datang Corp Science and Technology Research Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

The utility model relates to a thermal power plant circulating water system with a waste heat recovery function. The system is composed of a first unit and a second unit. The first unit is composed of a first cooling tower, a first circulating water pump, a first condenser, a first ice breaking pipe valve, a circulating water return main pipe valve, a circulating water pipe valve, a circulating water supply main pipe valve and a circulating water booster pump. The second unit is composed of a second cooling tower, a second circulating water pump, a second condenser, a second ice breaking pipe valve, a second circulating water return main pipe first valve and a second circulating water return main pipe second valve. The thermal power plant circulating water system has the advantages of simple structure, flexible and convenient operation and adjustment, energy saving, and the like.

Description

Circulated water system of thermal power plant
Technical field
The utility model belongs to generating set cooling technology field, relates in particular to a kind of Circulated water system of thermal power plant with function of recovering waste heat.
Background technology
In recent years, cogeneration plant is aided with that absorption heat pump reclaims circulating water afterheat, the transformation that realizes energy efficiency is more and more many, but the problems such as improved heat pump and system performance assurance and recirculated water optimization operation are out in the cold, especially the optimization operation of the improved system of heat pump and circulation is combined, also there is no the case of implementing at present.
At cogeneration plant's heat pump, reclaim in circulating water afterheat modernization system, mainly contain two kinds of transform patterns, a kind of is to utilize original circulation, heat pump is series to the circulation of condenser outlet, recirculated water flows out after heat pump, by entering water circulating pump entrance, then by solidifying, all enter the upper cooling tower of heat pump or part.When two unit paired runnings, part condensate water also can be passed through together with pipeline, in parallel with adjacent machine water circulating pump outlet, then, by adjacent machine condenser, two unit circulating water outlets contact pipelines, gets back to the outlet of the machine heat pump; Another pattern is after the heat pump after series connection, then adds one group of booster, and recirculated water flows out after heat pump, by booster, boosts, and after condenser, all enters heat pump, or the upper cooling tower of part.
The heat pump of mode one is relatively simple, and investment is saved, and its subject matter is that while being greater than water tower shaft height for heat pump resistance, scheme is infeasible, simultaneously during off-design operating mode in service, to unit economic influence larger.And the impact of this off-design operating mode on economy often ignored by run unit, or be in operation and be difficult to carry out quantitative demarcation or examination.At non-severe cold season, when heating demand is lower, main frame displacement is large, and environment temperature is high, can cause circulating water temperature to raise, and economics of heat pump declines, or affects the safety of low pressure (LP) cylinder exhaust stage blade.The heat pump of mode two has increased by one group of booster and a pipeline, and investment is just relatively higher, system with regard to relative complex some.When its soluble problem is greater than water tower shaft height for heat pump resistance exactly, scheme is feasible; Also can meet the service requirement of heat pump and therrmodynamic system, off-design operating mode is little simultaneously, and economical operation especially can meet the operation needs of heating demand heat pump when lower and the security of operation of main frame.
In country, advocate energetically under the overall background of energy-saving and emission-reduction, how in field, energy consumption rich and influential family-generating plant, to carry out that the degree of depth is energy-conservation taps the latent power, become the problem that current industry is anxious to be resolved and solving.One of cold junction circulating water system optimization mode of conventional cogeneration plant, be exactly by two water circulating pumps of a unit, designing respectively or transform as high, low speed mode moves, to according to the different load of the environment temperature of Various Seasonal and power plant, the operation form combining with high low speed respectively, meeting under the prerequisite of the cooling requirement of machine group end the power consumption of alap reduction water circulating pump.The application of power plant's heat pump is again a current energy-saving and cost-reducing effective means.And cogeneration plant's cold junction Operation Mode Optimization based on heat pump residual neat recovering system, not need to reinvest, cogeneration plant's circulating cooling system is in the past combined with improved heat pump waste heat recovery, reduce energy consumption, optimize new mode and the method for operation.
Utility model content
For solving the problems of the technologies described above, it is a kind of by the improved booster of heat pump and system thereof that the utility model provides, meeting under the environment temperature of Various Seasonal and the prerequisite of the cooling needs of load variations unit, simple in structure, operation flexible adjustment convenience, the Circulated water system of thermal power plant of the consumption of economizing on energy and electricity.
Circulated water system of thermal power plant of the present utility model, by at least one unit, formed, described unit comprises First unit, described First unit is by the first steam turbine, the first condenser, the first water circulating pump, the first cooling tower, the female tube valve of the first recirculated water backwater, first pipeline valve that opens ice, the female pipe of the first recirculated water backwater, the first recirculated water water main pipe, heat pump entrance circulating water pipeline valve, booster outlet valve, booster, heat pump and booster entrance circulating water pipeline valve form, described the first cooling tower is by the first water circulating pump, recirculated water water main pipe is connected with the first condenser entrance, the first condenser outlet is divided into two-way, the female pipe of the recirculated water backwater of leading up to is connected with the first cooling tower with the female tube valve of recirculated water backwater, separately lead up to heat pump entrance circulating water pipeline valve, heat pump, booster, booster outlet valve is connected with the first recirculated water water main pipe.
Further, also comprise second unit, described second unit is comprised of the second cooling tower, the second water circulating pump, the second recirculated water water supply line, the second condenser, the second recirculated water water return pipeline, the second female tube valve of pipeline valve and the second recirculated water backwater that opens ice, described the second cooling tower is connected with the second condenser entrance with the second recirculated water water main pipe by the second water circulating pump, and the second condenser outlet is connected with the second cooling tower with the female tube valve of the second recirculated water backwater by the female pipe of the second recirculated water backwater; The first recirculated water water main pipe is connected with the second recirculated water water main pipe by the first communicating door; The female pipe of the first recirculated water backwater is connected by the female pipe of the second communicating door and the second recirculated water backwater, and the first cooling tower is connected by flashboard valve with the second cooling tower.
Further, described the first water circulating pump and the second water circulating pump are comprised of the parallel connection of pumps of 1-4 platform.
Further, described recirculated water booster is comprised of the parallel connection of pumps of 1-4 platform.
Compared with prior art, the beneficial effect of Circulated water system of thermal power plant of the present utility model and operation method thereof is:
The cogeneration plant cold junction Operation Mode Optimization of the utility model based on heat pump residual neat recovering system, do not need to reinvest, flexible adjustment, by the improved booster of heat pump and system thereof, the unit in normal when operation that is applied to power plant is cooling, meeting under the environment temperature of Various Seasonal and the prerequisite of the cooling needs of load variations unit the consumption of effectively having saved station service.The method, by power plant's circulating cooling system in the past and improved heat pump residual neat recovering system, is reasonably selected and combines, real in carrying out energy-conservation a kind of new mode and the method for taping the latent power of the degree of depth in field, generating plant.The advantages such as that this Circulated water system of thermal power plant has is simple in structure, operation flexible adjustment convenience, economizing on energy and electricity.
Accompanying drawing explanation
Fig. 1 is the Circulated water system of thermal power plant schematic diagram of a unit of the utility model;
Fig. 2 is the Circulated water system of thermal power plant schematic diagram of two units of the utility model.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
Embodiment 1
As shown in Figure 2, Circulated water system of thermal power plant of the present utility model, is comprised of First unit and second unit.
First unit is comprised of open ice pipeline valve 106, the female tube valve 105 of the first recirculated water backwater, heat pump entrance circulating water pipeline valve 109, booster entrance circulating water pipeline valve 113, the first recirculated water water main pipe 108, the female pipe 107 of the first recirculated water backwater of the first cooling tower 104, the first water circulating pump 103, heat pump 112, booster 111, the first condenser 102, first.The first cooling tower 104 is connected with the first condenser 102 entrances by the first water circulating pump 103, recirculated water water main pipe 108, the first condenser 102 outlets are divided into two-way, and the female pipe 107 of the first recirculated water backwater of leading up to is connected with the first cooling tower 104 with the female tube valve 105 of the first recirculated water backwater; Separately leading up to heat pump entrance recirculated water valve 109, heat pump 112, booster 111, booster outlet valve 110 is connected in the first communicating door downstream with the first circulating water pipeline 108.
Second unit is comprised of open ice pipeline valve 206, the second recirculated water water return pipeline 207, the second recirculated water water supply line 208 of the second steam turbine 201, the second condenser 202, the second water circulating pump 203, the second cooling tower 204, the second recirculated water water supply line valve 205, second.The second cooling tower 204 is connected with the second condenser 202 entrances with the second recirculated water water main pipe 208 by the second water circulating pump 203, and the second condenser 202 outlets are connected with the second cooling tower 204 with the female tube valve 205 of the second recirculated water backwater by the female pipe 207 of the second recirculated water backwater again.
The first recirculated water water supply line 108 is connected with second recirculated water water supply line 208 by the first communicating door 122; The female pipe 107 of the first recirculated water backwater is connected by the female pipe 207 of the first communicating door 121 and the second recirculated water backwater.The first cooling tower 104 is connected with second cooling tower 204 by gate valve 123.
When the first steam turbine 101 operation, no matter whether the second steam turbine 201 moves, in the first steam turbine 101 start-up courses, during underrun or in the situation that environment temperature is lower, only move a booster 111, can realize and meet unit cooling requirement, thereby the object of realize saving station service.Specifically by following loop, realize operation: in the first cooling tower 104 tower basins, recirculated water enters after booster 111 adherence pressures through booster entrance recirculated water valve 113, after entering the first recirculated water water main pipe 108, heat pump outlet recirculated water valve 110 enters the first condenser 102, then through the first recirculated water water return pipeline 107, the first recirculated water water return pipeline valve 105, get back to the first cooling tower 104, so move in circles.While moving with which, heat pump entrance circulating water pipeline valve 109, first opens ice pipeline valve 106, the first communicating door 122 and the second communicating door 121 etc. in closed condition.
Embodiment 2
As shown in Figure 2, the Circulated water system of thermal power plant in the utility model embodiment is comprised of First unit and second unit.
First unit is comprised of open ice pipeline valve 106, the female tube valve 105 of the first recirculated water backwater, heat pump entrance circulating water pipeline valve 109, booster entrance circulating water pipeline valve 113, the first recirculated water water main pipe 108, the female pipe 107 of the first recirculated water backwater of the first cooling tower 104, the first water circulating pump 103, heat pump 112, booster 111, the first condenser 102, first.The first cooling tower 104 is connected with the first condenser 102 entrances by the first water circulating pump 103, recirculated water water main pipe 108, the first condenser 102 outlets are divided into two-way, and the female pipe 107 of the first recirculated water backwater of leading up to is connected with the first cooling tower 104 with the female tube valve 105 of the first recirculated water backwater; Separately leading up to heat pump entrance recirculated water valve 109, heat pump 112, booster 111, booster outlet valve 110 is connected in the first communicating door downstream with the first circulating water pipeline 108.
Second unit is comprised of open ice pipeline valve 206, the second recirculated water water return pipeline 207, the second recirculated water water supply line 208 of the second steam turbine 201, the second condenser 202, the second water circulating pump 203, the second cooling tower 204, the second recirculated water water supply line valve 205, second.The second cooling tower 204 is connected with the second condenser 202 entrances with the second recirculated water water main pipe 208 by the second water circulating pump 203, and the second condenser 202 outlets are connected with the second cooling tower 204 with the female tube valve 205 of the second recirculated water backwater by the female pipe 207 of the second recirculated water backwater again.
The first recirculated water water supply line 108 is connected with second recirculated water water supply line 208 by the first communicating door 122; The female pipe 107 of the first recirculated water backwater is connected by the female pipe 207 of the first communicating door 121 and the second recirculated water backwater.The first cooling tower 104 is connected with second cooling tower 204 by gate valve 123.
When the first steam turbine 101 operation, no matter whether the second steam turbine 201 moves, during at the first steam turbine band underload or compared with underload, or in the situation that environment temperature is lower, move a booster 111 and the first water circulating pump 103 simultaneously, can realize and meet unit cooling requirement, thereby the object of realize saving station service.The first water circulating pump 103 can be the method for operation at a high speed, can be also the method for operation of low speed, to realize the operation combination of different modes.The first water circulating pump 103 now also can replace with the second water circulating pump 203.Specifically can realize by following combined loop and the method for operation: recirculated water one tunnel in the first cooling tower 104 tower basins, after booster entrance circulating water pipeline valve 113 enters booster 111 and boosts, enters the first recirculated water water main pipe 108 through booster outlet circulating water pipeline valve 110.Another road enters the first recirculated water water main pipe 108 after the first water circulating pump 103.After two path water mixes, flow through successively the first condenser 102, the first recirculated water water return pipeline 107, the first recirculated water water return pipeline valve 105, then get back to the first cooling tower 104, so moves in circles; While moving with which, heat pump entrance circulating water pipeline valve 109, first opens ice the valves such as pipeline valve 106, the first communicating door 122 and the second communicating door 121 in closed condition.
Embodiment 3
As shown in Figure 2, the Circulated water system of thermal power plant in the utility model embodiment is comprised of First unit and second unit.
First unit is comprised of open ice pipeline valve 106, the female tube valve 105 of the first recirculated water backwater, heat pump entrance circulating water pipeline valve 109, booster entrance circulating water pipeline valve 113, the first recirculated water water main pipe 108, the female pipe 107 of the first recirculated water backwater of the first cooling tower 104, the first water circulating pump 103, heat pump 112, booster 111, the first condenser 102, first.The first cooling tower 104 is connected with the first condenser 102 entrances by the first water circulating pump 103, recirculated water water main pipe 108, the first condenser 102 outlets are divided into two-way, and the female pipe 107 of the first recirculated water backwater of leading up to is connected with the first cooling tower 104 with the female tube valve 105 of the first recirculated water backwater; Separately leading up to heat pump entrance recirculated water valve 109, heat pump 112, booster 111, booster outlet valve 110 is connected in the first communicating door downstream with the first circulating water pipeline 108.
Second unit is comprised of open ice pipeline valve 206, the second recirculated water water return pipeline 207, the second recirculated water water supply line 208 of the second steam turbine 201, the second condenser 202, the second water circulating pump 203, the second cooling tower 204, the second recirculated water water supply line valve 205, second.The second cooling tower 204 is connected with the second condenser 202 entrances with the second recirculated water water main pipe 208 by the second water circulating pump 203, and the second condenser 202 outlets are connected with the second cooling tower 204 with the female tube valve 205 of the second recirculated water backwater by the female pipe 207 of the second recirculated water backwater again.
The first recirculated water water supply line 108 is connected with second recirculated water water supply line 208 by the first communicating door 122; The female pipe 107 of the first recirculated water backwater is connected by the female pipe 207 of the first communicating door 121 and the second recirculated water backwater.The first cooling tower 104 is connected with second cooling tower 204 by gate valve 123.
When the first steam turbine 101 normal operation, the second steam turbine 201 is in start-up course, under band underrun state, move a booster 111 and the second water circulating pump 203 simultaneously, also can realize and meet second requirement that unit is cooling, thereby realize the object of saving station service.The second water circulating pump 203 can be the method for operation at a high speed, can be also the method for operation of low speed, to realize the operation combination of different modes.If the first water circulating pump 103 forms by many, and has stand-by state, the second water circulating pump 203 also can replace with the first standby water circulating pump 103.Cooling tower can adopt cooling tower 104, also can adopt cooling tower 204.Circulation moisture two-way in the first cooling tower 104 tower basins, the first via enters booster 111 through booster entrance circulating water pipeline valve 113, and enters the first recirculated water water main pipe 108 by booster outlet circulating water pipeline valve 110.Another road enters the first recirculated water water main pipe 108 after the first water circulating pump boosts, after be divided into two-way, the first via enters the second recirculated water water main pipe 208, the second condenser 202 and the female pipe 207 of the second recirculated water backwater successively through the first communicating door 122.There are two kinds of selections in the recirculated water path that enters the female pipe 207 of the second recirculated water backwater, and a kind of is to enter the second cooling tower 204 through the female tube valve 205 of the second recirculated water backwater, then through gate valve 123, gets back to the first cooling tower 104; Another kind is to enter the female pipe 107 of the first recirculated water backwater through the second communicating door 121; Another road recirculated water in the first recirculated water water main pipe 108 with from the recirculated water of the first communicating door 122, converge after enter successively the first condenser 102, the female pipe 107 of the first recirculated water backwater, converge by the female tube valve 105 of the first recirculated water backwater and enter the first cooling tower 104 with recirculated water from the second communicating door 121;
Embodiment 4
In this example, with booster 111 paired runnings be No. two water circulating pumps 203, its cooling water flow is to identical with example 3.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.

Claims (4)

1. Circulated water system of thermal power plant, it is characterized in that: by least one unit, formed, described unit comprises First unit, described First unit is by the first steam turbine, the first condenser, the first water circulating pump, the first cooling tower, the female tube valve of the first recirculated water backwater, first pipeline valve that opens ice, the female pipe of the first recirculated water backwater, the first recirculated water water main pipe, heat pump entrance circulating water pipeline valve, booster outlet valve, booster, heat pump and booster entrance circulating water pipeline valve form, described the first cooling tower is by the first water circulating pump, recirculated water water main pipe is connected with the first condenser entrance, the first condenser outlet is divided into two-way, the female pipe of the recirculated water backwater of leading up to is connected with the first cooling tower with the female tube valve of recirculated water backwater, separately lead up to heat pump entrance circulating water pipeline valve, heat pump, booster, booster outlet valve is connected with the first recirculated water water main pipe.
2. Circulated water system of thermal power plant according to claim 1, it is characterized in that: also comprise second unit, described second unit is by the second cooling tower, the second water circulating pump, the second recirculated water water supply line, the second condenser, the second recirculated water water return pipeline, the second female tube valve of pipeline valve and the second recirculated water backwater that opens ice forms, described the second cooling tower is connected with the second condenser entrance with the second recirculated water water main pipe by the second water circulating pump, the second condenser outlet is connected with the second cooling tower with the female tube valve of the second recirculated water backwater by the female pipe of the second recirculated water backwater,
The first recirculated water water main pipe is connected with the second recirculated water water main pipe by the first communicating door; The female pipe of the first recirculated water backwater is connected by the female pipe of the second communicating door and the second recirculated water backwater, and the first cooling tower is connected by flashboard valve with the second cooling tower.
3. Circulated water system of thermal power plant according to claim 1 and 2, is characterized in that: the first described water circulating pump and the second water circulating pump are comprised of the parallel connection of pumps of 1-4 platform.
4. Circulated water system of thermal power plant according to claim 1, is characterized in that: described recirculated water booster is comprised of the parallel connection of pumps of 1-4 platform.
CN201320882005.2U 2013-12-30 2013-12-30 Thermal power plant circulating water system Expired - Fee Related CN203745866U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103713607A (en) * 2013-12-30 2014-04-09 中国大唐集团科学技术研究院有限公司 Circulating water system for thermal power plant and operation method thereof
CN104898630A (en) * 2015-06-01 2015-09-09 北京京能未来燃气热电有限公司 Circulating water optimization system and method
CN104958997A (en) * 2015-07-10 2015-10-07 大唐科技产业集团有限公司 Closed water circulation device
CN106088214A (en) * 2016-08-09 2016-11-09 武汉钢铁股份有限公司 A kind of enlargement method of electric power plant circulating water system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103713607A (en) * 2013-12-30 2014-04-09 中国大唐集团科学技术研究院有限公司 Circulating water system for thermal power plant and operation method thereof
CN103713607B (en) * 2013-12-30 2017-12-15 中国大唐集团科学技术研究院有限公司 Circulated water system of thermal power plant and operation method
CN104898630A (en) * 2015-06-01 2015-09-09 北京京能未来燃气热电有限公司 Circulating water optimization system and method
CN104958997A (en) * 2015-07-10 2015-10-07 大唐科技产业集团有限公司 Closed water circulation device
CN106088214A (en) * 2016-08-09 2016-11-09 武汉钢铁股份有限公司 A kind of enlargement method of electric power plant circulating water system
CN106088214B (en) * 2016-08-09 2019-05-24 武汉钢铁有限公司 A kind of enlargement method of power plant cycle water system

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Assignee: DATANG NORTHEAST ELECTRIC POWER TEST RESEARCH INSTITUTE CO., LTD.

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Denomination of utility model: Thermal power plant circulating water system

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Patentee after: Datang northeast electric power test and Research Institute Co., Ltd.

Address before: 102206 room 1349, block D, main building, North China Electric Power University, 2 North Nong Road, Changping District, Beijing.

Patentee before: China Datang Group Science & Technology Research Institute Co., Ltd.

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