CN110030609A - Circulating cooling water afterheat recycling system - Google Patents
Circulating cooling water afterheat recycling system Download PDFInfo
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- CN110030609A CN110030609A CN201910220755.5A CN201910220755A CN110030609A CN 110030609 A CN110030609 A CN 110030609A CN 201910220755 A CN201910220755 A CN 201910220755A CN 110030609 A CN110030609 A CN 110030609A
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- water
- condenser
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- side water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
- F28B9/06—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid with provision for re-cooling the cooling water or other cooling liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to a kind of residual heat of electric power plant recovery technology fields, disclose a kind of circulating cooling water afterheat recycling system.The circulating cooling water afterheat recycling system includes the first condenser and absorption heat pump set gradually, side entrance of the first condenser is connected with the first external steam turbine, the secondary side water outlet of first condenser is connected with the hot net water side water inlet of the heat source side water inlet of absorption heat pump and absorption heat pump simultaneously, the secondary side water inlet of first condenser is connected with the heat source side water outlet of absorption heat pump, the hot net water side water outlet of absorption heat pump is connected with the water inlet of heating network, the water return outlet of heating network is connected with the heat source side water outlet of the secondary side water inlet of the first condenser and absorption heat pump simultaneously.Circulating cooling water afterheat recycling system according to the present invention can reduce the loss of thermal energy adequately using the low grade residual heat in recirculating cooling water system.
Description
Technical field
The present invention relates to a kind of residual heat of electric power plant recovery technology fields more particularly to a kind of circulating cooling water afterheat to recycle
System.
Background technique
Currently, the generating set of the small-sized thermal power plant in China or smelter power plant for self-supply, is greatly adopted
The steam exhaust of the steam turbine discharge of generating set in condenser is cooled to condensed water with recirculating cooling water system, to reduce steam turbine
Exhaust temperature, guarantee the vacuum degree of generating set.
However, being in the prior art usually to be handled the heat in recirculating cooling water system using two ways: the
One is recirculating cooling water system is directly connected with external cooling tower, so that heat can be directly released into atmosphere, but
Which can cause the loss of a large amount of heat, to directly result in the serious waste of thermal energy；Second is by circulating cooling
Water system is connected with for the heat supply to heat user, but since the waste heat in recirculating cooling water system is low-grade with heat user
Waste heat (i.e. thermal energy is less) is difficult in heat user, is difficult to meet heat demand being used in the heat supply of heat user.
In view of the deficiencies of the prior art, those skilled in the art is badly in need of seeking a kind of circulating cooling water afterheat recycling
System can improve the temperature of recirculated cooling water, using residual heat of electric power plant adequately to improve the low-grade of recirculated cooling water
The recycling of waste heat reduces the loss of the thermal energy of power plant.
Summary of the invention
The invention proposes a kind of circulating cooling water afterheat recycling systems, can adequately utilize residual heat of electric power plant
The temperature for improving recirculated cooling water reduces the thermal energy of power plant to improve the recycling of the low grade residual heat of recirculated cooling water
Loss.
Circulating cooling water afterheat recycling system according to the present invention includes the first condenser set gradually and absorption
Formula heat pump, a side entrance of the first condenser are connected with the first external steam turbine, the secondary side water outlet of the first condenser
Mouth is connected with the hot net water side water inlet of the heat source side water inlet of absorption heat pump and absorption heat pump simultaneously, the first condenser
Secondary side water inlet be connected with the heat source side water outlet of absorption heat pump, the hot net water side water outlet of absorption heat pump and supply
The water inlet of heat supply network is connected, the water return outlet of heating network simultaneously with the secondary side water inlet of the first condenser and absorption heat pump
Heat source side water outlet is connected.
Further, circulating cooling water afterheat recycling system further includes that time of the first condenser and heating network is arranged in
The second condenser between the mouth of a river, a side entrance of the second condenser are connected with the second external steam turbine, the second condensing
The secondary side water inlet of device is connected with the water return outlet of heating network, the secondary side water outlet of the second condenser while and absorption type heat
The heat source side water outlet of pump and the secondary side water inlet of the first condenser are connected.
Further, the water of the recirculated cooling water accommodated in the first condenser, which is greater than, to be accommodated in the second condenser
The water of recirculated cooling water.
Further, circulating cooling water afterheat recycling system further includes the hot net water side water outlet with absorption heat pump
The peak load calorifier being connected and the heat supply network heat exchanger being connected with peak load calorifier, wherein the water outlet of peak load calorifier with
The primary side water inlet of heat supply network heat exchanger is connected, and the primary side water return outlet and the secondary side of the second condenser of heat supply network heat exchanger enter
The mouth of a river is connected, and the secondary side outlet of heat supply network heat exchanger is connected with heat supply secondary network.
Further, circulating cooling water afterheat recycling system further includes condensing unit and First Heat Exchanger, absorption
The steam inlet of heat pump is used to be connected with external driving jet chimney, the condensation-water drain and condensing unit of absorption heat pump
Condensing water inlet be connected, the steam inlet of peak load calorifier is used to be connected with external driving jet chimney, and spike adds
The steam (vapor) outlet of hot device is connected with the condensing water inlet of condensing unit, the condensation-water drain of condensing unit and First Heat Exchanger
Primary side water inlet is connected, and the primary side water outlet of First Heat Exchanger is connected with external sweet-water tank, First Heat Exchanger
Secondary side water inlet simultaneously be connected with the secondary side water outlet of the hot net water side water inlet of absorption heat pump and the first condenser
Logical, the secondary side water outlet of First Heat Exchanger enters water with the hot net water side water outlet of absorption heat pump and peak load calorifier simultaneously
Mouth is connected.
Further, attemperator, attemperator and condensing unit are provided on the pipeline of the steam inlet of absorption heat pump
Condensation-water drain be connected.
Further, hot net water side water inlet, the absorption type heat of the heat source side water inlet of absorption heat pump, absorption heat pump
Filter device is provided at the steam inlet of pump and the steam inlet of peak load calorifier.
Further, circulating cooling water afterheat recycling system further includes pre-heating system, and pre-heating system is changed including second
Hot device, the primary side water inlet of the second heat exchanger are connected to the primary side water return outlet of heat supply network heat exchanger, the second heat exchanger it is primary
Side water outlet is connected with the secondary side water inlet of the second condenser, the secondary side water inlet of the second heat exchanger and external unboiled water
Water source is connected, and the secondary side water outlet of the second heat exchanger is connected with external unboiled water clarifying basin.
Further, pre-heating system further includes third heat exchanger, the primary side water inlet of third heat exchanger while and heat supply network
The primary side water return outlet of heat exchanger and the primary side water inlet of the second heat exchanger are connected, the primary side water outlet of third heat exchanger
It is connected with the secondary side water inlet of the second condenser, the secondary side water inlet of third heat exchanger and external ion-exchanger phase
Connection, the secondary side water outlet of third heat exchanger are connected with external demineralized water reheater.
Further, circulating cooling water afterheat recycling system further includes cooling tower, the water inlet of cooling tower and first
The secondary side water outlet of condenser and/or the secondary side water outlet of the second condenser are connected, the water outlet of cooling tower and first
The secondary side water inlet of condenser and/or the secondary side water inlet of the second condenser are connected.
Compared with prior art, circulating cooling water afterheat recycling system of the invention has the excellent of following several respects
Point:
1) circulating cooling water afterheat recycling system of the invention can be directly by circulating cooling by absorption heat pump
Temperature in water improves, additionally it is possible to by absorption heat pump by the heat extraction of the recirculated cooling water in internal circulation system and transfer
Circulating cooling into heating system is waterborne, so as to extract low temperature exhaust heat to the greatest extent to promote the confession of recirculated cooling water
Coolant-temperature gage meets the heat demand of heating network, this just effectively avoids the low-grade remaining of recirculated cooling water in the prior art
Heat is due to the problem of temperature is lower and more difficult recycling；
2) circulating cooling water afterheat recycling system of the invention can by the second heat exchanger of setting and third heat exchanger
The preheating to unboiled water and demineralized water is realized to achieve the effect that heating, thus can after so that recirculated cooling water is passed through heat supply network heat exchanger
Further its low grade residual heat is utilized again, to realize the sufficient utilization of the step of recirculated cooling water low grade residual heat,
Unboiled water and demineralized water in the prior art are also avoided simultaneously, and preheating and heating are realized using the low-pressure steam of plant area, power plant
Mode avoids the waste of steam energy so as to save a large amount of low-pressure steam；
3) there are part pipeline or other component damage in circulating cooling water afterheat recycling system of the invention and cause
When it is unable to operate normally, can by the way that pipeline is switched to cooling tower, enable recirculated cooling water by the first condenser and/
Or second enter directly into cooling tower after condenser, so that cooling recirculation system is effectively guaranteed can be under accident situation
Normal and safe operation.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the schematic diagram of circulating cooling water afterheat recycling system according to the present invention.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
Fig. 1 shows the schematic diagram of circulating cooling water afterheat recycling system 100 according to the present invention.As shown in Figure 1,
Circulating cooling water afterheat recycling system 100 of the invention includes the first condenser 11 and absorption heat pump 2 set gradually,
Side entrance 111 of the first condenser 11 is connected with the first external steam turbine 31, and the secondary side of the first condenser 11 goes out
The mouth of a river 113 is connected with the hot net water side water inlet 23 of the heat source side water inlet 21 of absorption heat pump 2 and absorption heat pump 2 simultaneously
Logical, the secondary side water inlet 112 of the first condenser 11 is connected with the heat source side water outlet 22 of absorption heat pump 2, absorption type heat
The hot net water side water outlet 24 of pump 2 is connected with the water inlet of heating network, the water return outlet of heating network and meanwhile with the first condenser 11
Secondary side water inlet 112 be connected with the heat source side water outlet 22 of absorption heat pump 2.
When in use, recirculated cooling water passes sequentially through first to circulating cooling water afterheat recycling system 100 of the invention
The hot net water side of the secondary side water inlet 112 of condenser 11, the secondary side water outlet 113 of the first condenser 11, absorption heat pump 2
Water inlet 23, the hot net water side water outlet 24 of absorption heat pump 2, the water inlet of heating network and heating network water return outlet after, most
The secondary side water inlet 112 of the first condenser 11 is returned to, eventually to form the recirculated cooling water heating system to heating network.Meanwhile
Recirculated cooling water also pass through the secondary side water outlet 113 of the firstth condenser 11, absorption heat pump 2 heat source side water outlet 22 with
And after the heat source side water outlet 22 of absorption heat pump 2, it is eventually returned to the secondary side water inlet 112 of the first condenser 11, to be formed
The internal circulation system of recirculated cooling water.
Specifically, in recirculated cooling water heating system, after recirculated cooling water enters the first condenser 11, with the first steamer
The high-temperature steam of machine 31 carries out heat exchange, and to realize the cooling to the first steam turbine 31, the recirculated cooling water after heating enters
The secondary side of absorption heat pump 2, absorption heat pump 2 can be by the temperature exchanges of low-pressure steam to following under the action of low-pressure steam
On ring cooling water, so that the temperature of recirculated cooling water can increase again.At the same time, in internal circulation system, circulation
Cooling water is by after the heating of the first condenser 11, and recirculated cooling water point all the way enters the primary side of absorption heat pump 2, equally
Under the action of low-pressure steam, absorption heat pump 2 can be by the temperature exchange of the recirculated cooling water in primary side to secondary side
Circulating cooling is waterborne, that is to say, that the recirculated cooling water after being heated up by the first condenser 11 is under the action of absorption heat pump 2
The temperature of the recirculated cooling water in the primary side of low-pressure steam and absorption heat pump 2 can be absorbed, so that into heating network
The temperature of recirculated cooling water can further improve.
By above-mentioned setting, compared with prior art, circulating cooling water afterheat recycling system 100 of the invention passes through
Absorption heat pump 2 can directly improve the temperature in recirculated cooling water, additionally it is possible to by absorption heat pump 2 by internal circulation system
The heat extraction of interior recirculated cooling water and to be transferred to the circulating cooling in heating system waterborne, so as to mention to the greatest extent
Low temperature exhaust heat is taken to promote the supply water temperature of recirculated cooling water, meets the heat demand of heating network, this just effectively avoids existing
There is the low grade residual heat of the recirculated cooling water in technology due to the problem of temperature is lower and more difficult recycling.Therefore, of the invention
Circulating cooling water afterheat recycling system 100 be more advantageous to recirculated cooling water waste heat recycling and utilization.In addition, by inhaling
The recirculated cooling water in internal circulation system after shrinkage temperature turns again in the first condenser 11, additionally it is possible to reduce the first condenser
The temperature of 11 secondary side water inlet 112, so as to the first condenser 11 of more efficiently raising to the first steam turbine 31
Cooling effect.
In preferred embodiment as shown in Figure 1, circulating cooling water afterheat recycling system 100 may also include setting
The second condenser 12 between the first condenser 11 and the water return outlet of heating network, a side entrance 121 of the second condenser 12
It is connected with the second external steam turbine 32, the secondary side water inlet 122 of the second condenser 12 is connected with the water return outlet of heating network
It is logical, the secondary side water outlet 123 of the second condenser 12 while heat source side water outlet 22 and the first condenser with absorption heat pump 2
11 secondary side water inlet 112 is connected to.
By above-mentioned setting, recirculated cooling water successively passes through the two-stage heat exchange of the second condenser 12 and the first condenser 11
Afterwards, it is capable of the temperature of direct step by step raising recirculated cooling water, to be more advantageous to the low grade residual heat of recirculated cooling water
Recycling and utilization.Preferably, the power of the second steam turbine 32 is smaller than the power of the first steam turbine 31, such as the first steam turbine 31
Power when being 25MW, the power of the second steam turbine 31 can be 12MW, so that the heat by the second condenser 12 exchanges
It can satisfy the cooling requirement to the first steam turbine 31 into the recirculated cooling water of the first condenser 11 afterwards, that is to say, that power
The heat that bigger steam turbine generates is more, more with the heat of circulating cooling water coke slurry, as long as it follows that steam turbine
Power increase or meet recirculated cooling water step by step to the cooling requirement of steam turbine, the embodiment of the present invention be not limited to only two it is solidifying
The scheme of vapour device.
In one preferred embodiment, the water of the recirculated cooling water accommodated in the first condenser 11 can be greater than the
The water of the recirculated cooling water accommodated in two condensers 12.By the setting, biggish first condenser 11 of water content is not only
Effectively the first steam turbine 31 can be cooled down, recirculated cooling water is also enabled more fully to absorb the first steamer
The heat of machine 31, adequately to improve the temperature of recirculated cooling water.For example, the water of the recirculated cooling water in the first condenser 11
Amount is about 5500t/h, and the water of the recirculated cooling water in the second condenser 12 is about 2800t/h.
In preferred embodiment as shown in Figure 1, circulating cooling water afterheat recycling system 100 may also include and inhale
The peak load calorifier 41 being connected of hot net water side water outlet 24 of receipts formula heat pump 2 and the heat supply network being connected with peak load calorifier 41 change
Hot device 42, wherein the water outlet 411 of peak load calorifier 41 is connected with the primary side water inlet 421 of heat supply network heat exchanger 42, heat supply network
The primary side water return outlet 422 of heat exchanger 42 is connected with the secondary side water inlet 122 of the second condenser 12, heat supply network heat exchanger 42
Secondary side outlet 423 is connected with heating network.By the setting, in the difficult cold phase, environment temperature is lower and makes recirculated cooling water
Supply water temperature it is lower when, the recirculated cooling water into heating network can initially enter and carry out heat temperature raising in peak load calorifier 41,
So that the temperature of recirculated cooling water can satisfy the heat demand of heating network.What needs to be explained here is that in the first end cold phase, to confession
Coolant-temperature gage is of less demanding, and the circulating cooling coolant-temperature gage of the hot net water side water outlet 24 of absorption heat pump 2 can satisfy heating network
When heat demand, recirculated cooling water can be discharged by the hot net water side of the connection absorption heat pump 2 in parallel with peak load calorifier 41
The bypass (not shown) of the water inlet of mouth 24 and heating network is directly entered heating network heat supply.
In preferred embodiment as shown in Figure 1, circulating cooling water afterheat recycling system 100 may also include condensation
Device 51 and First Heat Exchanger 52, the steam inlet 25 of absorption heat pump 2 are used to (not show in figure with external driving jet chimney
It is connected out), the condensation-water drain 26 of absorption heat pump 2 is connected with the condensing water inlet 511 of condensing unit 51, spike heating
The steam inlet 412 of device 41 is used to be connected with external driving jet chimney (not shown), the steaming of peak load calorifier 41
Vapor outlet 413 is connected with the condensing water inlet 511 of condensing unit 51, and the condensation-water drain 512 of condensing unit 51 is changed with first
The primary side water inlet 521 of hot device 52 is connected, the primary side water outlet 522 of First Heat Exchanger 52 and external sweet-water tank phase
Connection, the secondary side water inlet 523 of First Heat Exchanger 52 are solidifying with the hot net water side water inlet 23 of absorption heat pump 2 and first simultaneously
The secondary side water outlet 113 of vapour device 11 is connected, the secondary side water outlet 524 of First Heat Exchanger 52 simultaneously with absorption heat pump 2
Hot net water side water outlet 24 be connected with the water inlet 414 of peak load calorifier 41.
By above-mentioned setting, condensing unit 51 and First Heat Exchanger 52 can act on 2 He of absorption heat pump convenient for steam
Peak load calorifier 41 and condense into the recycling after condensed water, condensed water after the recovery has a large amount of heat, in this way, solidifying from first
The circulating cooling moisture that the secondary side water outlet 113 of vapour device 11 is discharged all the way can be with the after the secondary side of First Heat Exchanger 52
The primary side of one heat exchanger 52 carries out heat exchange, so that temperature when recirculated cooling water enters heating network is further improved,
And then it is more advantageous to the recycling and utilization of the low grade residual heat of recirculated cooling water.Meanwhile the recirculated cooling water to heat up again can also
It is enough to reduce the quantity of steam for being applied to peak load calorifier 41.
In preferred embodiment as shown in Figure 1, it may be provided on the pipeline of the steam inlet of absorption heat pump 2 25
Attemperator 53, attemperator 53 can be connected with the condensation-water drain 512 of condensing unit 52.Pass through the setting, it is ensured that absorption
The stabilization of driving vapour source (i.e. low-pressure steam) temperature of heat pump 2, avoids the pipe network temperature due to low-pressure steam too high to absorption
The normal operation of heat pump 2 has an impact.
In a preferred embodiment, the heat supply network of the heat source side water inlet 21 of absorption heat pump 2, absorption heat pump 2
It may be provided at the steam inlet 412 of water side water inlet 23, the steam inlet 25 of absorption heat pump 2 and peak load calorifier 41
Filter device (not shown) to ensure the cleannes of recirculated cooling water and steam into absorption heat pump 2, and enters
The cleannes of the steam of peak load calorifier 41, the problem of avoiding clogging.
In preferred embodiment as shown in Figure 1, circulating cooling water afterheat recycling system 100 may also include preheating
System, pre-heating system may include the second heat exchanger 61, primary side water inlet 611 and the heat supply network heat exchanger 42 of the second heat exchanger 61
Primary side water return outlet 422 is connected, and the secondary side of the primary side water outlet 612 of the second heat exchanger 61 and the second condenser 12 enters water
Mouth 122 is connected, and the secondary side water inlet 613 of the second heat exchanger 61 can be connected with external unboiled water water source, the second heat exchanger
61 secondary side water outlet 614 can be connected with external unboiled water clarifying basin.
Preferably, pre-heating system may also include third heat exchanger 62, and the primary side water inlet 621 of third heat exchanger 62 is simultaneously
It is connected with the primary side water inlet 611 of the primary side water return outlet 422 of heat supply network heat exchanger 42 and the second heat exchanger 61, third heat exchange
The primary side water outlet 622 of device 62 is connected with the secondary side water inlet 122 of the second condenser 12, third heat exchanger 62 it is secondary
Side water inlet 623 can be connected with external ion-exchanger, and the secondary side water outlet 624 of third heat exchanger 62 can be with outside
Demineralized water reheater is connected.
Since power plants generating electricity unit inevitably has loss of steam and water in process of production, often need to mend to system
Fill the demineralized water with certain temperature and water quality qualification.Between being all from of demineralized water waterwheel used in power plant, change the water between waterwheel
Source is generally derived from underground unboiled water or rivers prefiltration unboiled water, and temperature is lower directly to be used, before entering unboiled water clarifying basin
It needs unboiled water carrying out pre-heating temperature elevation, so that the flocculants such as bodied ferric sulfate reach best purification effect.By purifying, filtering
Unboiled water be pumped in ion-exchanger by clear water, with remove the hard salt in water formed demineralized water, demineralized water preheating rise
It is then sent through after temperature in boiler feed and carries out next stage processing.Circulating cooling water afterheat recycling system 100 of the invention is logical
The effect of the pre-heating temperature elevation to unboiled water and demineralized water can be realized by crossing the second heat exchanger 61 of setting and third heat exchanger 62, to make to follow
Ring cooling water can further utilize its low grade residual heat again after passing through heat supply network heat exchanger 42, to realize recirculated cooling water
Low grade residual heat makes full use of, while also avoiding unboiled water and demineralized water in the prior art and being steamed using the low pressure of plant area, power plant
Vapour realizes that the mode of preheating and heating avoids the waste of steam energy so as to save a large amount of low-pressure steam.
Specifically, the recirculated cooling water that the primary side water return outlet 422 of heat supply network heat exchanger 42 is discharged, by heat supply network heat exchanger
Still there is waste heat, by by the primary side water return outlet 422 of heat supply network heat exchanger 42 and the after the heat exchange of 42 primary side and secondary side
The primary side water inlet 611 of two heat exchangers 61 and/or the primary side water inlet 621 of third heat exchanger 62 are connected to, so that having remaining
The recirculated cooling water of heat be able to enter the primary side to the second heat exchanger 61 with the unboiled water of the secondary side to the second heat exchanger 61 into
Row preheating, and/or enter the primary side of third heat exchanger 62 and carried out in advance with the demineralized water of the secondary side to third heat exchanger 62
Heat, so as to directly improve the temperature of unboiled water and/or demineralized water.In addition, by the second heat exchanger 61 and/or third heat exchanger
After 62 heat exchange, the recirculated cooling water that temperature reduces also is more advantageous to it into the second condenser 12 or the first condenser 11
Afterwards to the cooling effect of the second steam turbine 32 or the first steam turbine 31.
Preferably, it may be provided with dirt separator 43 (as shown in Figure 1) on the main line of heat supply network heat exchanger 42 and pre-heating system, with
Guarantee cleaning of the cooling cycle water being discharged by the primary side water return outlet 422 of heat supply network heat exchanger 42 when entering pre-heating system
Degree.It is further preferred that settable multiple pressure-detecting device (not shown)s, multiple flow detectors on each connecting line
(not shown) and multiple temperature sensor (not shown)s, and temperature sensor can be chain with controller signals, with
Guarantee the normal and safe operation of circulating cooling water afterheat recycling system 100.
In preferred embodiment as shown in Figure 1, circulating cooling water afterheat recycling system 100 may also include cooling
Tower 7, the water inlet 71 of cooling tower 7 can be secondary with the secondary side water outlet 113 of the first condenser 11 and/or the second condenser 12
Side water outlet 123 is connected, and the water outlet 72 of cooling tower 7 can be with the secondary side water inlet 112 and/or second of the first condenser 11
The secondary side water inlet 122 of condenser 12 is connected.By the setting, when circulating cooling water afterheat of the invention recycles system
It, can be by the way that pipeline be switched to cooling when having part pipeline or other component damage in system 100 and it being caused to be unable to operate normally
Tower 7 enables recirculated cooling water to enter directly into cooling tower 7 after the first condenser 11 and/or the second condenser 12,
It can be in the normal and safe operation under accident situation to which cooling recirculation system be effectively guaranteed.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.Especially, as long as there is no knots
Structure conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The present invention does not limit to
In specific embodiment disclosed herein, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of circulating cooling water afterheat recycling system, which is characterized in that including the first condenser set gradually and suction
Receipts formula heat pump, a side entrance of first condenser are connected with the first external steam turbine, first condenser
Secondary side water outlet enters water with the heat source side water inlet of the absorption heat pump and the hot net water side of the absorption heat pump simultaneously
Mouth is connected, and the secondary side water inlet of first condenser is connected with the heat source side water outlet of the absorption heat pump, institute
The hot net water side water outlet for stating absorption heat pump is connected with the water inlet of heating network, the water return outlet of the heating network simultaneously with institute
The secondary side water inlet for stating the first condenser is connected with the heat source side water outlet of the absorption heat pump.
2. circulating cooling water afterheat recycling system according to claim 1, which is characterized in that the recirculated cooling water
Waste heat recycling system further includes the second condensing being arranged between first condenser and the water return outlet of the heating network
Device, a side entrance of second condenser are connected with the second external steam turbine, the secondary side of second condenser
Water inlet is connected with the water return outlet of the heating network, the secondary side water outlet of second condenser simultaneously with it is described absorption
The heat source side water outlet of heat pump is connected with the secondary side water inlet of first condenser.
3. circulating cooling water afterheat recycling system according to claim 2, which is characterized in that first condenser
The water of interior accommodated recirculated cooling water is greater than the water of the recirculated cooling water accommodated in second condenser.
4. circulating cooling water afterheat recycling system according to claim 2, which is characterized in that the recirculated cooling water
Waste heat recycling system further include the peak load calorifier being connected with the hot net water side water outlet of the absorption heat pump and with
The heat supply network heat exchanger that the peak load calorifier is connected, wherein the water outlet of the peak load calorifier and the one of heat supply network heat exchanger
Secondary side water inlet is connected, the secondary side water inlet phase of the primary side water return outlet of the heat supply network heat exchanger and second condenser
Connection, the secondary side outlet of the heat supply network heat exchanger are connected with heat supply secondary network.
5. circulating cooling water afterheat recycling system according to claim 4, which is characterized in that the recirculated cooling water
Waste heat recycling system further includes condensing unit and First Heat Exchanger, and the steam inlet of the absorption heat pump is used for and outside
Driving jet chimney be connected, the condensation-water drain of the absorption heat pump is connected with the condensing water inlet of the condensing unit
Logical, the steam inlet of the peak load calorifier is used to be connected with external driving jet chimney, the steaming of the peak load calorifier
Vapor outlet is connected with the condensing water inlet of the condensing unit, the condensation-water drain of the condensing unit and first heat exchange
The primary side water inlet of device is connected, and the primary side water outlet of the First Heat Exchanger is connected with external sweet-water tank, institute
State the secondary side water inlet of First Heat Exchanger while hot net water side water inlet and first condensing with the absorption heat pump
The secondary side water outlet of device is connected, the secondary side water outlet of the First Heat Exchanger while the heat supply network with the absorption heat pump
Water side water outlet is connected with the water inlet of the peak load calorifier.
6. circulating cooling water afterheat recycling system according to claim 5, which is characterized in that in the absorption type heat
Attemperator is provided on the pipeline of the steam inlet of pump, the attemperator is connected with the condensation-water drain of the condensing unit.
7. circulating cooling water afterheat recycling system according to claim 5, which is characterized in that the absorption heat pump
Heat source side water inlet, the hot net water side water inlet of the absorption heat pump, the steam inlet of the absorption heat pump and institute
It states and is provided with filter device at the steam inlet of peak load calorifier.
8. circulating cooling water afterheat recycling system according to claim 6 or 7, which is characterized in that the circulation is cold
But water waste heat recycling system further includes pre-heating system, and the pre-heating system includes the second heat exchanger, second heat exchanger
Primary side water inlet be connected with the primary side water outlet of the heat supply network heat exchanger, the water outlet of the primary side of second heat exchanger
Mouth is connected with the secondary side water inlet of second condenser, the secondary side water inlet of second heat exchanger and external life
Water water source is connected, and the secondary side water outlet of second heat exchanger is connected with external unboiled water clarifying basin.
9. circulating cooling water afterheat recycling system according to claim 8, which is characterized in that the pre-heating system is also
Including third heat exchanger, the primary side water inlet of the third heat exchanger while the primary side water return outlet with the heat supply network heat exchanger
It is connected with the primary side water inlet of second heat exchanger, the primary side water outlet of the third heat exchanger is solidifying with described second
The secondary side water inlet of vapour device is connected, and the secondary side water inlet of the third heat exchanger is connected with external ion-exchanger
Logical, the secondary side water outlet of the third heat exchanger is connected with external demineralized water reheater.
10. the circulating cooling water afterheat recycling system according to Claims 2 or 3, which is characterized in that the circulation
Cooling water heat recycling system further includes cooling tower, the secondary side of the water inlet of the cooling tower and first condenser
The secondary side water outlet of water outlet and/or second condenser is connected, and the water outlet of the cooling tower is solidifying with described first
The secondary side water inlet of the secondary side water inlet of vapour device and/or second condenser is connected.
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| CN209910021U (en) * | 2019-03-22 | 2020-01-07 | 中冶西北工程技术有限公司 | Circulating cooling water waste heat recycling system |
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| CN101619662A (en) * | 2009-08-14 | 2010-01-06 | 清华大学 | Method for recovering waste heat of thermal power plant and heating and supplying heat to hot water in a stepping way |
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