CN103090358B - Cooling water heat recovery system of power plant and heat recovery method - Google Patents
Cooling water heat recovery system of power plant and heat recovery method Download PDFInfo
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- CN103090358B CN103090358B CN201310025053.4A CN201310025053A CN103090358B CN 103090358 B CN103090358 B CN 103090358B CN 201310025053 A CN201310025053 A CN 201310025053A CN 103090358 B CN103090358 B CN 103090358B
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- 239000000498 cooling water Substances 0.000 title claims abstract description 90
- 238000011084 recovery Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 144
- 238000005498 polishing Methods 0.000 claims abstract description 52
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000011144 upstream manufacturing Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 abstract description 18
- 238000009833 condensation Methods 0.000 abstract description 18
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract 1
- 241000242583 Scyphozoa Species 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The invention provides a cooling water heat recovery system of a power plant. The system comprises an auxiliary engine cooling water circulation subsystem which is provided with an auxiliary engine cooling water backwater pipeline (5) and a condensation water circulation subsystem which is provided with a condensate polishing unit (8). The cooling water heat recovery system is provided with a first heat exchanger (2) which is capable of transmitting the heat of the fluid in a low temperature pipeline to the fluid of a high temperature pipeline, the low temperature pipeline of the first heat exchanger is connected with the auxiliary engine cooling water backwater pipeline (5) in series, and the high temperature pipeline of the first heat exchanger is connected with a condensation water pipeline in the lower reaches of the condensate polishing unit in series along the flow direction of condensation water. On the other hand, the invention further provides a heat recovery method of the cooling water heat recovery system of the power plant. The cooling water heat recovery system can effectively recover the heat in the backwater of the auxiliary engine cooling water of the power plant, prevent an auxiliary engine cooling tower from discharging steam into the air, and eliminate the accident potential.
Description
Technical field
The present invention relates to field of thermal power, particularly, relate to a kind of cooling water heat recovering system and heat recovery method of power plant.
Background technology
In the water circulation system in existing thermal power plant, the subsidiary engine cooling water (wet type cooling unit is commonly referred to as out cold water) of Air-cooled Unit is for the equipment such as bearing and oil cooler of cooled electric generator, each subsidiary engine.Subsidiary engine cooling water has independently water circulation path.After absorbing the heat that the motor feels hot produces, subsidiary engine cooling water realizes the cooling of self by outdoor subsidiary engine cooling tower.That is, in the backwater path of subsidiary engine cooling water, the heat in subsidiary engine cooling water is discharged into the atmosphere by subsidiary engine cooling tower.Like this, following negative consequence is produced to I haven't seen you for ages: one, along with the release of the heat of subsidiary engine cooling water, has steam and fly away in the plant area in power plant everywhere.Especially, time in the winter time, the steam flown away is fallen on the outdoor electrical equipment below Air-Cooling Island can condense into frost, constitutes a threat to thus to the safe operation of electrical equipment; Its two, the heat in subsidiary engine cooling water is directly discharged in air, causes the waste of the energy.
In addition, in the water circulation system in existing thermal power plant, be used for repeating acting by after condensate water collecting and heating.Condensate water has independently water circulation path.Precision processing device of condensation water is provided with in order to filter the foreign material of the various physics and chemistries in condensate water in the water circulation path of condensate water.The filter core of the filter in precision processing device is normally made up of resin material, and the upper limit of this material to serviceability temperature there are certain requirements.When the water temperature of condensate water is prescribed a time limit higher than the upper of serviceability temperature of this material, the settling mode adopted in prior art is closed by the inlet valve of polisher, makes condensate water walk around polisher and directly flow through from bypass conduit.Condensate system is so just caused to lack the purge segment in polisher, unfavorable to the safe operation of condensate system.
Summary of the invention
The object of this invention is to provide a kind of cooling water heat recovering system and heat recovery method of power plant, in order to the heat recovery and utilization by the subsidiary engine cooling water backwater in subsidiary engine CWR road, and improve the operation conditions of condensate water circulation subsystem.
To achieve these goals, the invention provides a kind of cooling water heat recovering system of power plant, this cooling water heat recovering system comprises: the subsidiary engine cooling water circulation subsystem with subsidiary engine CWR road, and the condensate water circulation subsystem with condensate polishing treatment unit.The First Heat Exchanger that the heat of the fluid of cryogenic pipe can be passed in the fluid of high temperature conduit is provided with in this cooling water heat recovering system, the cryogenic pipe of this First Heat Exchanger is connected in subsidiary engine CWR road, and the high temperature conduit of this First Heat Exchanger is connected in the condensate line in the downstream of described condensate polishing treatment unit along the flow direction of condensate water.
Preferably, second heat exchanger that the heat of the fluid of high temperature conduit can be passed in the fluid of cryogenic pipe is also provided with in cooling water heat recovering system; Wherein, along the flow direction of condensate water, the high temperature conduit of the second heat exchanger is connected in the condensate line of the upstream of condensate polishing treatment unit; Along the flow direction of subsidiary engine cooling water, the cryogenic pipe of the second heat exchanger is connected in the described subsidiary engine CWR road of the cryogenic pipe upstream of First Heat Exchanger.
Preferably, the condensate water circulation subsystem flow direction also had along condensate water is connected to the condensate water low-pressure heater unit in condensate polishing treatment unit downstream; Wherein, the high temperature conduit of First Heat Exchanger is connected in the pipeline between the outlet of described condensate polishing treatment unit and the outlet of condensate water low-pressure heating unit.
Preferably, condensate water circulation subsystem also has condensate pump unit, and along the flow direction of condensate water, condensate pump unit is connected to the upstream of condensate polishing treatment unit; Wherein, the high temperature conduit of the second heat exchanger is connected in the pipeline between the outlet of condensate pump unit and the entrance of condensate polishing treatment unit.
Preferably, condensate water low-pressure heater unit comprises multiple condensate water low-pressure heater be connected in series; Wherein, the high temperature conduit of First Heat Exchanger be connected on that the flow direction along condensate water in multiple condensate water low-pressure heater arranges between first condensate water low-pressure heater and second condensate water low-pressure heater.
Preferably, First Heat Exchanger is absorption heat pump.
On the other hand, the present invention also provides a kind of heat recovery method of cooling water heat recovering system of power plant, cooling water heat recovering system comprises: the subsidiary engine cooling water circulation subsystem with subsidiary engine CWR road, and the condensate water circulation subsystem with condensate polishing treatment unit; Heat recovery method comprises: utilize the First Heat Exchanger that the heat of the fluid of cryogenic pipe can be passed in the fluid of high temperature conduit, be passed in the condensate water to be heated in the downstream of condensate polishing treatment unit by the heat of the subsidiary engine cooling water backwater in subsidiary engine CWR road.
Preferably, heat recovery method also comprises: in cooling water heat recovering system, arrange second heat exchanger that the heat of the fluid of high temperature conduit can be passed in the fluid of cryogenic pipe, before entering First Heat Exchanger at subsidiary engine cooling water backwater, utilize the condensate water of this subsidiary engine cooling water backwater to condensate polishing treatment unit upstream to cool.
Preferably, the condensate water circulation subsystem flow direction also had along condensate water is connected to the condensate water low-pressure heater unit in condensate polishing treatment unit downstream; Wherein, the high temperature conduit of First Heat Exchanger is connected in the pipeline between the outlet of condensate polishing treatment unit and the outlet of condensate water low-pressure heating unit.
Preferably, condensate water circulation subsystem also has condensate pump unit, and along the flow direction of condensate water, condensate pump unit is connected to the upstream of condensate polishing treatment unit; Wherein, the high temperature conduit of the second heat exchanger is connected in the pipeline between the outlet of condensate pump unit and the entrance of condensate polishing treatment unit.
Preferably, condensate water low-pressure heater unit comprises multiple condensate water low-pressure heater be connected in series; Wherein, between the high temperature conduit of First Heat Exchanger first condensate water low-pressure heater being connected on the flow direction along condensate water in multiple condensate water low-pressure heater and second condensate water low-pressure heater.
Preferably, First Heat Exchanger is absorption heat pump.
By technique scheme, the present invention arranges First Heat Exchanger heat being passed to the fluid in high temperature conduit from the fluid cryogenic pipe in the water circulation system in power plant.After using this First Heat Exchanger, the temperature of subsidiary engine cooling water backwater can be reduced on the one hand, thus make subsidiary engine cooling water backwater possess the temperature conditions entering next cycle period; On the other hand can the condensate water in heat-setting crystal processing unit downstream, thus contribute to the efficiency of heating surface improving condensate water low-pressure heating unit.So, effectively can recycle the heat in the backwater of subsidiary engine cooling water, reduce the loss of water circulation system; Meanwhile, subsidiary engine cooling tower can be avoided to discharged steam in air, eliminate the accident potential because steam causes in electrical equipment surface frosting.
In addition, the present invention also arranges the second heat exchanger be passed to from the fluid of high temperature conduit by heat the fluid of cryogenic pipe in the water circulation system in power plant, before entering First Heat Exchanger at subsidiary engine cooling water backwater, the condensate water of this subsidiary engine cooling water backwater to condensate polishing treatment unit upstream is utilized to cool.After using this second heat exchanger, the temperature of condensate water can be reduced on the one hand before condensate water flows into condensate polishing treatment unit, make the filter core of the filter in polisher always work in the lower state of temperature, thus improve the running environment of filter core; Subsidiary engine cooling water backwater is except having self-contained heat on the other hand, has absorbed again the heat in condensate water in the second heat exchanger extraly.Therefore can be recovered to more heat from subsidiary engine cooling water backwater in First Heat Exchanger, improve the energy conversion efficiency of First Heat Exchanger.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the partial structurtes schematic diagram of the cooling water heat recovering system according to power plant of the present invention.
Description of reference numerals
1 second heat exchanger 2 First Heat Exchanger
3 condensate water water tanks 4 condense jellyfish pipe
5 subsidiary engine CWR road 6 condensate pump unit
7 condensate water low-pressure heater unit 71 first condensate water low-pressure heaters
73 second condensate water low-pressure heaters 75 the 3rd condensate water low-pressure heater
8 condensate polishing treatment unit 81 precision processing device of condensation waters
83 shunt valves
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
It should be noted that, when not doing contrary explanation, the noun of locality " upstream " used and " downstream " refer in a cycle period, along subsidiary engine cooling water flow direction subsidiary engine cooling water first through place for " upstream ", after be " downstream " through place; In a cycle period, along condensate water flow direction condensate water first through place for " upstream ", after be " downstream " through place.
With reference to figure 1, the invention provides a kind of cooling water heat recovering system of power plant.In this cooling water heat recovering system, comprise subsidiary engine cooling water circulation subsystem and condensate water circulation subsystem.Wherein, subsidiary engine cooling water circulation subsystem has subsidiary engine CWR road 5.When after the equipment such as the bearing of subsidiary engine water quench generator, each subsidiary engine and oil cooler, concentrate and be back in subsidiary engine CWR road 5.Subsidiary engine cooling water backwater in subsidiary engine CWR road 5, through cooling, reenters next cycle period.Condensate water circulation subsystem has condensate polishing treatment unit 8.After the condensate water collected in condensate water water tank 3 is driven into condensation jellyfish pipe 4 by condensate pump unit 6, in condensate polishing treatment unit 8, carries out purified treatment and heat in condensate water low-pressure heater unit 7.
According to embodiments of the invention, condensate polishing treatment unit 8 comprises precision processing device of condensation water 81, and the shunt valve 83 between the entrance and exit being connected to precision processing device of condensation water 81.The filter core of the filter in precision processing device of condensation water 81 is the filter core of resin material, the upper limit of the operating temperature of this filter core normally 65 DEG C.Under normal operation conditions, make shunt valve 83 be in blocking state by the valve of closing on shunt valve 83, condensate water flows through from precision processing device of condensation water 81.When the temperature of condensate water exceedes this ceiling temperature, in order to protect filter core to make it be unlikely to impaired, open valve and shunt valve 83 is connected, condensate water is walked around precision processing device of condensation water 81 and is flowed away from shunt valve 83.
More specifically, according to embodiments of the invention, First Heat Exchanger 2 is set in cooling water heat recovering system.The heat of the fluid of cryogenic pipe can be passed in the fluid of high temperature conduit by this First Heat Exchanger 2.According to embodiments of the invention, this First Heat Exchanger 2 is absorption heat pump.First Heat Exchanger 2 take lithium bromide as medium, realizes heat exchange reaction under the driving of steam.As shown in fig. 1, V1 interface and V2 interface are the high temperature conduit interfaces of First Heat Exchanger 2, and V3 interface and V4 interface are the driving steam pipework interfaces of First Heat Exchanger 2, and V5 interface and V6 interface are the cryogenic pipe interfaces of First Heat Exchanger 2.According to the operation principle of First Heat Exchanger in prior art, the fluid that temperature is lower flows into the cryogenic pipe of First Heat Exchanger 2 from V5 interface, flow out from V6 interface; The fluid that temperature is higher flows into the high temperature conduit of First Heat Exchanger 2 from V1 interface, flow out from V2 interface; Drive steam to flow into First Heat Exchanger 2 from V3 interface, flow out from V4 interface.Under the driving of steam, by the effect of lithium bromide medium, the heat of the fluid of cryogenic pipe can be realized to be passed in the fluid of high temperature conduit.
According to embodiments of the invention, the cryogenic pipe of First Heat Exchanger 2 is connected in subsidiary engine CWR road 5, and the high temperature conduit of this First Heat Exchanger 2 is connected in the pipeline of the flowing of condensate water.And, according to embodiments of the invention, the high temperature conduit of First Heat Exchanger 2 is connected in the pipeline in the downstream of condensate polishing treatment unit 8, thus avoids the condensate water absorbing heat flow through from condensate polishing treatment unit 8 and damage the filter core of the filter in precision processing device of condensation water 81.Further, according to embodiments of the invention, along the flow direction of condensate water, be connected with condensate water low-pressure heater unit 7 in the downstream of condensate polishing treatment unit 8.The high temperature conduit of First Heat Exchanger 2 is connected in the pipeline between the outlet of condensate polishing treatment unit 8 and the outlet of condensate water low-pressure heating unit 7.Like this, utilize the power conversion effect of First Heat Exchanger 2, the heat in subsidiary engine cooling water backwater can be realized to be delivered in the condensate water in the downstream of condensate polishing treatment unit 8, thus realize the recovery of the heat in subsidiary engine cooling water backwater.By this, the temperature of subsidiary engine cooling water backwater can be reduced, make subsidiary engine cooling water backwater possess the temperature conditions entering next cycle period.Meanwhile, the condensate water in all right heat-setting crystal processing unit 8 downstream, thus improve condensing water temperature, improve thermodynamic system efficiency.
In more detail, according to embodiments of the invention, condensate water low-pressure heater unit 7 comprises multiple condensate water low-pressure heater be connected in series.As shown in fig. 1, along the flow direction of described condensate water, condensate water low-pressure heater unit 7 comprises first condensate water low-pressure heater, 71, second condensate water low-pressure heater 73 and the 3rd condensate water low-pressure heater 75.Should be appreciated that, three the condensate water low-pressure heaters herein enumerated are only for the purpose of description, instead of exhaustive.According to embodiments of the invention, the high temperature conduit of First Heat Exchanger 2 is connected between first condensate water low-pressure heater 71 and second condensate water low-pressure heater 73.Because condensate water heats up gradually along its flow direction in condensate water low-pressure heater unit 7, therefore, in condensate water low-pressure heater unit 7, the configuration relevant to temperature parameter of upstream can relatively lower than the configuration relevant with temperature parameter of downstream pipe.In other words, the high temperature conduit of First Heat Exchanger 2 is connected between first condensate water low-pressure heater 71 and second condensate water low-pressure heater 73, the parameter configuration of the high temperature conduit of First Heat Exchanger 2 can be reduced, thus reduce the manufacturing cost of First Heat Exchanger 2.
Continue with reference to figure 1, according to embodiments of the invention, be also provided with the second heat exchanger 1 in cooling water heat recovering system, the heat of the fluid of high temperature conduit can be passed in the fluid of cryogenic pipe by this second heat exchanger 1.According to embodiments of the invention, the second heat exchanger 1 is arranged on the upstream of First Heat Exchanger 2.Specifically, along the flow direction of condensate water, the high temperature conduit of the second heat exchanger 1 is connected in the pipeline of the condensate water of the upstream of condensate polishing treatment unit 8; Along the flow direction of subsidiary engine cooling water, the cryogenic pipe of the second heat exchanger 1 is connected in the subsidiary engine CWR road 5 of the cryogenic pipe upstream of First Heat Exchanger 2.That is, subsidiary engine cooling water backwater, before flowing in First Heat Exchanger 2, first will flow through from the second heat exchanger 1.
More specifically, according to embodiments of the invention, be connected with condensate pump unit 6 in the upstream of condensate polishing treatment unit 8, condensate water pumps into condensation jellyfish pipe 4 from condensate water water tank 3 by this condensate pump unit 6.Further, the high temperature conduit of the second heat exchanger 1 is connected in the pipeline between the outlet of condensate pump unit 6 and the entrance of condensate polishing treatment unit 8.As shown in fig. 1, in the second heat exchanger 1, the subsidiary engine cooling water backwater generation heat exchange that temperature in the condensate water that temperature in condensation jellyfish pipe 4 is higher and subsidiary engine CWR road 5 is lower, subsidiary engine cooling water absorbs the heat in the condensate water in condensation jellyfish pipe 4 as low-temperature receiver, thus, the temperature of the condensate water in condensation jellyfish pipe 4 is reduced.
As previously mentioned; the filter core of precision processing device of condensation water 81 needs to work in the temperature environment below 65 DEG C; therefore, by the second heat exchanger 1, the temperature of the condensate water of the upstream of condensate polishing treatment unit 8 is reduced, be conducive to the filter core of protect concrete polishing unit 81.Further, when subsidiary engine cooling water backwater flows out from the second heat exchanger 1, except there is self-contained heat, in the second heat exchanger 1, the heat of the condensate water in condensation jellyfish pipe 4 has been absorbed again extraly.Like this, when these subsidiary engine cooling water backwater flow in First Heat Exchanger 2, carry more heat, thus more heat can be recovered to from these subsidiary engine cooling water backwater, the energy conversion efficiency of First Heat Exchanger can be improved by this.
On the other hand, the present invention also provides a kind of heat recovery method of above-mentioned cooling water heat recovering system.The method comprises, and utilizes First Heat Exchanger 2, is passed in the condensate water to be heated in the downstream of condensate polishing treatment unit 8 by the heat of the subsidiary engine cooling water backwater in subsidiary engine CWR road 5.
More specifically, according to embodiments of the invention, first, the high temperature conduit of First Heat Exchanger 2 is connected in the pipeline in downstream of condensate polishing treatment unit 8.Secondly, the cryogenic pipe of First Heat Exchanger 2 is connected in subsidiary engine CWR road 5.Then, opening First Heat Exchanger 2 makes the heat in subsidiary engine cooling water backwater be passed to the condensate water flowed out from condensate polishing treatment unit 8, to reclaim the heat in subsidiary engine cooling water backwater.
Method provided by the invention also comprises, second heat exchanger 1 is set in cooling water heat recovering system, thus before subsidiary engine cooling water backwater enters First Heat Exchanger 2, utilize the condensate water of this subsidiary engine cooling water backwater to condensate polishing treatment unit 8 upstream to cool.
More specifically, according to embodiments of the invention, first, the high temperature conduit of the second heat exchanger 1 is connected in the pipeline of the upstream of condensate polishing treatment unit 8.Secondly, the cryogenic pipe of the second heat exchanger 1 is connected in the subsidiary engine CWR road 5 of the upstream of the cryogenic pipe of First Heat Exchanger 2.Thus, before condensate water enters condensate polishing treatment unit 8, the temperature of this condensate water is reduced.
More detailed embodiment describes in the preceding article, repeats no more herein.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. the cooling water heat recovering system in a power plant, this cooling water heat recovering system comprises: the subsidiary engine cooling water circulation subsystem with subsidiary engine CWR road (5), and the condensate water circulation subsystem with condensate polishing treatment unit (8), it is characterized in that, the First Heat Exchanger (2) that the heat of the fluid of cryogenic pipe can be passed in the fluid of high temperature conduit is provided with in this cooling water heat recovering system, the cryogenic pipe of this First Heat Exchanger (2) is connected in described subsidiary engine CWR road (5), the high temperature conduit of this First Heat Exchanger (2) is connected in the condensate line in the downstream of described condensate polishing treatment unit (8) along the flow direction of condensate water, second heat exchanger (1) that the heat of the fluid of high temperature conduit can be passed in the fluid of cryogenic pipe is also provided with in this cooling water heat recovering system, wherein, along the flow direction of condensate water, the high temperature conduit of described second heat exchanger (1) is connected in the condensate line of the upstream of described condensate polishing treatment unit (8).
2. the cooling water heat recovering system in power plant according to claim 1, it is characterized in that, along the flow direction of subsidiary engine cooling water, the cryogenic pipe of described second heat exchanger (1) is connected in the described subsidiary engine CWR road (5) of the cryogenic pipe upstream of described First Heat Exchanger (2).
3. the cooling water heat recovering system in power plant according to claim 1 and 2, it is characterized in that, the described condensate water circulation subsystem flow direction also had along described condensate water is connected to the condensate water low-pressure heater unit (7) in described condensate polishing treatment unit (8) downstream;
Wherein, the high temperature conduit of described First Heat Exchanger (2) is connected in the pipeline between the outlet of described condensate polishing treatment unit (8) and the outlet of described condensate water low-pressure heater unit (7).
4. the cooling water heat recovering system in power plant according to claim 2, it is characterized in that, described condensate water circulation subsystem also has condensate pump unit (6), along the flow direction of described condensate water, described condensate pump unit (6) is connected to the upstream of described condensate polishing treatment unit (8);
Wherein, the high temperature conduit of described second heat exchanger (1) is connected in the pipeline between the outlet of described condensate pump unit (6) and the entrance of described condensate polishing treatment unit (8).
5. the cooling water heat recovering system in power plant according to claim 3, is characterized in that, described condensate water low-pressure heater unit (7) comprises multiple condensate water low-pressure heater be connected in series;
Wherein, the high temperature conduit of described First Heat Exchanger (2) be connected on that the flow direction along described condensate water in multiple described condensate water low-pressure heater arranges between first condensate water low-pressure heater (71) and second condensate water low-pressure heater (73).
6. the cooling water heat recovering system in power plant according to claim 1, is characterized in that, described First Heat Exchanger (2) is absorption heat pump.
7. the heat recovery method of the cooling water heat recovering system in a power plant, described cooling water heat recovering system comprises: the subsidiary engine cooling water circulation subsystem with subsidiary engine CWR road (5), and the condensate water circulation subsystem with condensate polishing treatment unit (8), it is characterized in that, described heat recovery method comprises: utilize the First Heat Exchanger (2) that the heat of the fluid of cryogenic pipe can be passed in the fluid of high temperature conduit, the heat of the subsidiary engine cooling water backwater in described subsidiary engine CWR road (5) is passed in the condensate water to be heated in the downstream of described condensate polishing treatment unit (8), wherein, this heat recovery method also comprises: in described cooling water heat recovering system, arrange second heat exchanger (1) that the heat of the fluid of high temperature conduit can be passed in the fluid of cryogenic pipe, to enter First Heat Exchanger (2) at subsidiary engine cooling water backwater before, utilize the condensate water of this subsidiary engine cooling water backwater to condensate polishing treatment unit (8) upstream to cool.
8. the heat recovery method of the cooling water heat recovering system in power plant according to claim 7, it is characterized in that, the described condensate water circulation subsystem flow direction also had along described condensate water is connected to the condensate water low-pressure heater unit (7) in described condensate polishing treatment unit (8) downstream;
Wherein, the high temperature conduit of described First Heat Exchanger (2) is connected in the pipeline between the outlet of described condensate polishing treatment unit (8) and the outlet of condensate water low-pressure heater unit (7).
9. the heat recovery method of the cooling water heat recovering system in power plant according to claim 7, it is characterized in that, described condensate water circulation subsystem also has condensate pump unit (6), along the flow direction of described condensate water, described condensate pump unit (6) is connected to the upstream of described condensate polishing treatment unit (8);
Wherein, the high temperature conduit of described second heat exchanger (1) is connected in the pipeline between the outlet of described condensate pump unit (6) and the entrance of condensate polishing treatment unit (8).
10. the heat recovery method of the cooling water heat recovering system in power plant according to claim 9, is characterized in that, described condensate water low-pressure heater unit (7) comprises multiple condensate water low-pressure heater be connected in series;
Wherein, between the high temperature conduit of described First Heat Exchanger (2) first condensate water low-pressure heater (71) being connected on the flow direction along described condensate water in multiple described condensate water low-pressure heater and second condensate water low-pressure heater (73).
The heat recovery method of the cooling water heat recovering system in 11. power plants according to claim 7, is characterized in that, described First Heat Exchanger (2) is absorption heat pump.
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| CN201310025053.4A CN103090358B (en) | 2013-01-23 | 2013-01-23 | Cooling water heat recovery system of power plant and heat recovery method |
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| CN115682181B (en) * | 2022-09-19 | 2023-06-13 | 华能济南黄台发电有限公司 | Combined heat and power generation method for combined heat and power supply |
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| CN201934152U (en) * | 2010-12-29 | 2011-08-17 | 中国电力工程顾问集团公司 | Indirect air cooling system for supercritical unit or ultra-supercritical unit |
| CN102220888B (en) * | 2011-05-11 | 2015-04-01 | 北京创时能源有限公司 | Method and system for recovering circulating water residual heat of thermal power plants |
| CN202182510U (en) * | 2011-08-13 | 2012-04-04 | 双良节能系统股份有限公司 | Centralized heat supply system capable of utilizing waste heat of direct air cooling power plant |
| CN203052634U (en) * | 2013-01-23 | 2013-07-10 | 中国神华能源股份有限公司 | Cooling water heat recycling system of power plant |
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