CN106440903B - Heat reservoir for extraction condensing type cogeneration unit - Google Patents
Heat reservoir for extraction condensing type cogeneration unit Download PDFInfo
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- CN106440903B CN106440903B CN201610912983.5A CN201610912983A CN106440903B CN 106440903 B CN106440903 B CN 106440903B CN 201610912983 A CN201610912983 A CN 201610912983A CN 106440903 B CN106440903 B CN 106440903B
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- 238000000605 extraction Methods 0.000 title claims abstract description 52
- 238000005338 heat storage Methods 0.000 claims abstract description 83
- 238000009825 accumulation Methods 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 239000008400 supply water Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 53
- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/028—Control arrangements therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention provides a kind of heat reservoirs for extraction condensing type cogeneration unit, including：Heat storage exchanger, heat release heat exchanger, heat-storing device, circulating pump and control valve.Heat storage exchanger, heat-storing device, circulating pump and control valve group are at heat accumulation circuit；Heat release heat exchanger, heat-storing device, circulating pump and control valve group are at heat release circuit.Wherein, heat storage exchanger couples with the output end of main bleed steam pipework；For heat accumulation circuit, the main steam extraction that the circuit working medium in heat accumulation circuit is exported with the output end of main bleed steam pipework exchanges heat in heat storage exchanger, and stores heat in heat-storing device；For heat release circuit, the circuit working medium in heat release circuit exchanges heat with target fluid working medium to be heated in heat release heat exchanger after obtaining heat in heat-storing device.Heat reservoir provided by the invention can improve the adjustability that unit electricity is contributed under the premise of guarantee Electricity Federation production unit total heating demand.
Description
Technical field
The present invention relates to technical field of energy utilization, and in particular to a kind of heat accumulation system for extraction condensing type cogeneration unit
System.
Background technology
Cogeneration of heat and power is a kind of energy conserving system using energy cascade utilization principle, raising efficiency of energy utilization.It is at this
In system, the high temperature and high pressure steam that the heating of the combustion of fossil fuel such as coal and natural gas obtains first be used to generate electricity, the steam after power generation
It is used for heat supply again.Therefore co-generation unit has energy saving, reduction atmosphere pollution, saving urban land etc. many excellent
Point.
Existing cogeneration units mainly have two kinds of back pressure type and extraction condensing type.Wherein, extraction condensing type unit is in operational process
In, by certain temperature, the superheated steam of certain pressure (such as temperature is about 250 DEG C, and absolute pressure is about 0.21MPa) is from steam turbine
It is drawn into heat supply initial station and is used to heat hot net water (i.e. heat supply water type is chiefly used in northern China heat supply in winter), or will directly steam
Vapour transfers to heat user (i.e. for steam type, being chiefly used in industrial heat).The waste heat of steam is utilized in this process, improves primary energy
Utilization ratio.
In heat supply period, in order to ensure heating load, there is minimum main steam amount in cogeneration units, therefore steam flows through steamer
There are lower limits for the amount of work of machine.This means that there is always minimum generated energy for cogeneration units, i.e., unit is with " electricity determining by heat "
Mode operation limits the regulating power of electricity output.
Invention content
For the defects in the prior art, the present invention provides a kind of heat reservoir for extraction condensing type cogeneration unit,
The adjustability that unit electricity is contributed can be improved under the premise of guarantee cogeneration units total heating demand.
In order to solve the above technical problems, the present invention provides following technical scheme：
A kind of heat reservoir for extraction condensing type cogeneration unit, including：
Heat storage exchanger, heat release heat exchanger, heat-storing device, circulating pump and control valve；
Wherein, heat storage exchanger, heat-storing device, circulating pump and control valve couple composition heat accumulation circuit successively；Heat release exchanges heat
Device, heat-storing device, circulating pump and control valve couple composition heat release circuit successively；
Wherein, heat storage exchanger couples with the output end of main bleed steam pipework；For heat accumulation circuit, control valve control with
And under the driving of circulating pump, the main steam extraction that the circuit working medium in heat accumulation circuit is exported with the output end of main bleed steam pipework is in heat storage and exchange
It exchanges heat in device, and stores heat in heat-storing device；For heat release circuit, in the control of control valve and the drive of circulating pump
Under dynamic, the circuit working medium in heat release circuit exchanges heat with target fluid working medium to be heated in heat release after obtaining heat in heat-storing device
It exchanges heat in device.
Preferably, the system is used for heat supply water type extraction condensing type cogeneration unit；
Correspondingly, the heat storage exchanger also couples with heat supply initial station；Wherein, the main steam extraction is all in heat storage exchanger
It is exported after exchanging heat to heat supply initial station；
Or part exchanges heat in heat storage exchanger, another part is directly output to the heat supply initial station；The heat release is changed
Hot device couples with heat supply initial station；Wherein, target fluid working medium to be heated all exported after heat release heat exchanger exchanges heat to
The heat supply initial station；Or part exchanges heat in heat storage exchanger, another part is directly output to the heat supply initial station.
Preferably, the heat storage exchanger and heat supply initial station coupled in series, the heat release heat exchanger and heat supply initial station
Coupled in series.
Preferably, the heat storage exchanger and heat supply initial station coupled in series, the heat release heat exchanger and heat supply initial station
Parallel connection.
Preferably, the heat storage exchanger and heat supply initial station parallel connection, the heat release heat exchanger and heat supply initial station
Coupled in series.
Preferably, the heat storage exchanger and heat supply initial station parallel connection, the heat release heat exchanger and heat supply initial station
Parallel connection.
Preferably, the system is used for for steam type extraction condensing type cogeneration unit；The heat storage exchanger and main steam extraction
The output end of pipeline couples；
Specifically, there are one control valve, the first end of the control valve and institutes for the output end setting of the main bleed steam pipework
The output end connection of main bleed steam pipework is stated, second end is coupled by a straight-through valve with user's heat supply end, and third end is straight-through by one
Valve couples with heat storage exchanger；
The heat release heat exchanger and heater coupled in series, the heater are exported for that will pass through the heat release heat exchanger
Heating after target fluid working medium be heated to target temperature.
Preferably, the transition temperature range of the heat accumulation working medium in the heat-storing device is 40 DEG C~500 DEG C.
It as shown from the above technical solution, can be provided by the present invention for the heat reservoir of extraction condensing type cogeneration unit
When steamer owner's extraction for heat supply amount is higher than the thermic load of user, using heat accumulation circuit from the vapor absorption part in main bleed steam pipework
Heat is stored in heat-storing device；When steamer owner's extraction for heat supply amount is less than the thermic load of user, discharged using heat release circuit
The energy of heat-storing device storage.The present invention realizes the decoupling that cogeneration units electricity is contributed and heat is contributed, to improve heat
Produce the flexibility of unit in Electricity Federation.
Description of the drawings
It, below will be to embodiment or existing skill in order to illustrate more clearly of the present embodiment or technical solution in the prior art
Attached drawing is briefly described needed in art description, it should be apparent that, the accompanying drawings in the following description is the one of the present invention
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1-Fig. 3 is heat storage exchanger provided by Embodiment 2 of the present invention to connect with heat supply initial station, heat release heat exchanger and confession
The hot concatenated structural schematic diagram in initial station；
Fig. 4-Fig. 6 is heat storage exchanger provided by Embodiment 2 of the present invention to connect with heat supply initial station, heat release heat exchanger and confession
Hot initial station structural schematic diagram in parallel；
Fig. 7-Fig. 9 is heat storage exchanger provided by Embodiment 2 of the present invention and the heat supply in parallel, heat release heat exchanger in initial station and confession
The hot concatenated structural schematic diagram in initial station；
Figure 10-Figure 12, heat release heat exchangers in parallel with heat supply initial station that be heat storage exchanger provided by Embodiment 2 of the present invention and
Heat supply initial station structural schematic diagram in parallel；
Figure 13-Figure 15 is the heat accumulation system being used for for steam type extraction condensing type cogeneration unit that the embodiment of the present invention three proposes
System structural schematic diagram；
In Fig. 1-15,1 is heat supply initial station, and 2 be extracted steam from turbine, and 3 be condenser or oxygen-eliminating device entrance, and 5 be that hot net water returns
Water pipe, 6 be circulating pump, and 7 be hot net water feed pipe, and 8 be heat supply network circuit, and 9 be heating steam, and 10 be heater, and 11 be water pump, 12
It is cold water inlet, 13 be heat storage exchanger, and 14 be heat release heat exchanger, and 15 be heat-storing device, and 16 be circulating pump, and 17 be control valve,
18 be heat accumulation circuit, and 19 be heat release circuit, and 20 and 21 are control valves, and 22,23,24 and 25 be straight-through valve.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention carries out clear, complete description.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Nearly ten years, with the development of the regenerative resources such as wind-force, photovoltaic, electric power system dispatching is contributed to having each power plant
Flexibility demand it is growing.However a large amount of cogeneration units present in electric system at present, regulating power is limited,
Make electric system receive the pin of regenerative resource to be greatly limited.Therefore, there is an urgent need for invent a kind of effective thermoelectricity decoupling system
System is to improve the flexibility of unit electricity output.
The purpose of the present invention is to propose to a kind of heat reservoirs for improving extraction condensing type cogeneration unit flexibility, with reality
Now the electricity of cogeneration units is contributed and heat output decouples to a certain extent.The system can be not only used for heat supply water type thermoelectricity connection
Unit is produced, and can be used for for steam type cogeneration units.Under the premise of guarantee cogeneration units total heating demand, improve
The adjustability that unit electricity is contributed.
Embodiment one
The embodiment of the present invention one provides a kind of heat reservoir for extraction condensing type cogeneration unit, which includes：
Heat storage exchanger, heat release heat exchanger, heat-storing device, circulating pump and control valve；In the present embodiment, control valve is real using triple valve
It is existing, naturally it is also possible to disclosure satisfy that the control valve of demand using four-way valve, five-way valve etc..
Wherein, heat storage exchanger, heat-storing device, circulating pump and control valve couple composition heat accumulation circuit successively；Heat release exchanges heat
Device, heat-storing device, circulating pump and control valve couple composition heat release circuit successively；
Wherein, heat storage exchanger couples with the output end of main bleed steam pipework；For heat accumulation circuit, control valve control with
And under the driving of circulating pump, the main steam extraction that the circuit working medium in heat accumulation circuit is exported with the output end of main bleed steam pipework is in heat storage and exchange
It exchanges heat in device, and stores heat in heat-storing device；For heat release circuit, in the control of control valve and the drive of circulating pump
Under dynamic, the circuit working medium in heat release circuit exchanges heat with target fluid working medium to be heated in heat release after obtaining heat in heat-storing device
It exchanges heat in device.
Here, the circuit working medium in heat accumulation circuit or heat release circuit can be conduction oil or high pressure water etc..
Here, for heat supply water type cogeneration units, target fluid working medium to be heated includes being returned by hot net water
The hot net water of water pipe outflow.For for steam type cogeneration units, target fluid working medium to be heated is drawn including outside
The cold water entered.
Here, by the control to control valve and circulating pump, heat accumulation is carried out by heat accumulation circuit, and return by heat release
Road carries out heat release.Specifically, when steamer owner's extraction for heat supply amount is higher than heat user end load, using heat accumulation circuit from main steam extraction
Vapor absorption partial heat in pipeline, is stored in heat-storing device.When steamer owner's extraction for heat supply amount is negative less than heat user end
When lotus, the energy of heat release circuit release heat-storing device storage is utilized.
Heat reservoir provided in this embodiment for extraction condensing type cogeneration unit, can be in steamer owner's extraction for heat supply amount
When higher than heat user end load, using heat accumulation circuit from the vapor absorption partial heat in main bleed steam pipework, it is stored in heat accumulation dress
In setting；When steamer owner's extraction for heat supply amount is less than heat user end load, the energy of heat release circuit release heat-storing device storage is utilized
Amount.The present embodiment realizes the decoupling that cogeneration units electricity is contributed and heat is contributed, to improve the spirit of cogeneration units
Activity.
Embodiment two
In the present embodiment, the heat reservoir is used for heat supply water type extraction condensing type cogeneration unit.
Referring to Fig. 1, the heat storage exchanger 13 also couples with heat supply initial station 1；Wherein, the main steam extraction is all changed in heat accumulation
Hot device 13 exports after countercurrent flow occurs to heat supply initial station 1 (such as heat storage exchanger 13 is coupled with heat supply initial station 1)；
Or part exchanges heat in heat storage exchanger, another part be directly output to heat supply initial station (such as heat storage exchanger 13 and
Heat supply initial station 1 is in parallel to be coupled).
In addition, the heat release heat exchanger 14 also couples with heat supply initial station 1, target fluid working medium to be heated is all in heat release
Output occurs after countercurrent flow for heat exchanger 14, and to heat supply initial station 1, (such as heat release heat exchanger 14 and heat supply 1 are connected connection at first stop
Knot)；Or part exchanges heat in heat storage exchanger, another part is directly output to the heat supply (such as heat release heat exchanger at first stop
14 are coupled with 1 parallel connection of heat supply initial station).
In the first realization method of the present embodiment, the heat storage exchanger and heat supply initial station coupled in series, institute
State heat release heat exchanger and heat supply initial station coupled in series.
Preferably, the first end of the heat storage exchanger couples with the output end of main bleed steam pipework, second end and the confession
Hot initial station couples；Specifically, the first end of the heat release heat exchanger couples with hot net water backwater end, and second end is first with the heat supply
It stands connection.
Referring to Fig. 1, Fig. 2, Fig. 3, the heat storage exchanger 13 and 1 coupled in series of heat supply initial station, the heat release heat exchange
Device 14 and 1 coupled in series of heat supply initial station；
Wherein, the first end of the heat storage exchanger 13 couples with the output end of main bleed steam pipework, second end and the confession
Hot initial station 1 couples.The output end of the main bleed steam pipework is for exporting extracted steam from turbine, such as the extracted steam from turbine 2 in Fig. 1.
Wherein, the first end of the heat release heat exchanger 14 couples with hot net water backwater end, second end and heat supply initial station 1
Connection.The hot net water backwater end is used to export the return water flow of hot net water, such as the hot net water return pipe 5 in Fig. 3, the hot net water
Return pipe 5 is exactly the return water flow for exporting hot net water.
In second of realization method of the present embodiment, the heat storage exchanger and heat supply initial station coupled in series, institute
State heat release heat exchanger and the parallel connection of heat supply initial station.
Preferably, the first end of the heat storage exchanger couples with the output end of main bleed steam pipework, second end and the confession
Hot initial station couples；
Preferably, the third comprising the heat supply initial station is obtained simultaneously after the heat release heat exchanger and the parallel connection of heat supply initial station
Join branch and the 4th parallel branch comprising heat release heat exchanger；
Correspondingly, there are one control valve, the first end of the control valve and the heat supply networks for the hot net water backwater end setting
Water backwater end couples, and second end couples with third parallel branch, and third end couples with the 4th parallel branch；
Wherein, in third parallel branch further include a straight-through valve, the first end of the straight-through valve and the second of the control valve
End connection, second end couple with heat supply initial station；
Further include a straight-through valve, the third end of the first end of the straight-through valve and the control valve in 4th parallel branch
Connection, second end couple with the heat release heat exchanger.
Referring to Fig. 4, Fig. 5, Fig. 6, the heat storage exchanger 13 and 1 coupled in series of heat supply initial station, the heat release heat exchange
Device 14 and heat supply 1 parallel connection of initial station；
Wherein, the first end of the heat storage exchanger 13 couples with the output end of main bleed steam pipework, second end and the confession
Hot initial station 1 couples.The output end of the main bleed steam pipework is for exporting extracted steam from turbine, such as the extracted steam from turbine 2 in Fig. 4.
Wherein, the heat release heat exchanger 14 and heat supply 1 parallel connection of initial station, obtain the third for including heat supply initial station 1
Parallel branch and the 4th parallel branch comprising heat release heat exchanger 14；
Correspondingly, hot net water backwater end setting is there are one control valve 21, the first end of the control valve 21 with it is described
Hot net water backwater end couples, and second end couples with third parallel branch, and third end couples with the 4th parallel branch；
Wherein, in third parallel branch further include a straight-through valve 24, the first end of the straight-through valve 24 and the control valve 21
Second end connection, second end and the heat supply 1 couple at first stop；
Further include a straight-through valve 25, the first end of the straight-through valve 25 and the control valve 21 in 4th parallel branch
Third end couples, and second end couples with the heat release heat exchanger 14.
In the third realization method of the present embodiment, the heat storage exchanger and heat supply initial station parallel connection, institute
State heat release heat exchanger and heat supply initial station coupled in series.
Preferably, the comprising the heat supply initial station is obtained after the heat storage exchanger and heat supply initial station parallel connection
One parallel branch and the second parallel branch comprising heat storage exchanger；
Correspondingly, there are one control valve, threeway may be used in the control valve for the output end setting of the main bleed steam pipework
Valve, four-way valve or two two-way valves are realized.The first end of the control valve couples with the output end of the main bleed steam pipework, and second
End couples with the first parallel branch, and third end couples with the second parallel branch；
Wherein, in the first parallel branch further include a straight-through valve, the first end of the straight-through valve and the second of the control valve
End connection, second end couple with heat supply initial station；
Further include a straight-through valve, the third end of the first end of the straight-through valve and the control valve in second parallel branch
Connection, second end couple with the heat storage exchanger；
Specifically, the first end of the heat release heat exchanger couples with hot net water backwater end, second end and heat supply initial station
Connection.
Referring to Fig. 7, Fig. 8, Fig. 9, the heat storage exchanger 13 and the heat supply 1 parallel connection of initial station are obtained comprising described
First parallel branch of heat supply initial station and the second parallel branch comprising heat storage exchanger 13；
Correspondingly, there are one control valve 20, the first ends of the control valve 20 for the output end setting of the main bleed steam pipework
Couple with the output end of the main bleed steam pipework, second end couples with the first parallel branch, and third end joins with the second parallel branch
It connects；
Wherein, in the first parallel branch further include a straight-through valve 22, the first end of the straight-through valve 22 and the control valve 20
Second end connection, second end and the heat supply 1 couple at first stop；
Further include a straight-through valve 23, the first end of the straight-through valve 23 and the control valve 20 in second parallel branch
Third end couples, and second end couples with the heat storage exchanger 13.
Wherein, the heat release heat exchanger 14 and 1 coupled in series of heat supply initial station；Wherein, the first of the heat release heat exchanger 14
End couples with hot net water backwater end, and second end couples with heat supply initial station 1.The hot net water backwater end is for exporting hot net water
Return water flow, such as the hot net water return pipe 5 in Fig. 3, which is exactly the return water water for exporting hot net water
Stream.
In the 4th kind of realization method of the present embodiment, the heat storage exchanger and heat supply initial station parallel connection, institute
State heat release heat exchanger and the parallel connection of heat supply initial station.
Preferably, the comprising the heat supply initial station is obtained after the heat storage exchanger and heat supply initial station parallel connection
One parallel branch and the second parallel branch comprising heat storage exchanger；
Correspondingly, there are one control valve, the first end of the control valve and institutes for the output end setting of the main bleed steam pipework
The output end connection of main bleed steam pipework is stated, second end couples with the first parallel branch, and third end couples with the second parallel branch；
Wherein, in the first parallel branch further include a straight-through valve, the first end of the straight-through valve and the second of the control valve
End connection, second end couple with heat supply initial station；
Further include a straight-through valve, the third end of the first end of the straight-through valve and the control valve in second parallel branch
Connection, second end couple with the heat storage exchanger；
Specifically, the third comprising the heat supply initial station is obtained simultaneously after the heat release heat exchanger and the parallel connection of heat supply initial station
Join branch and the 4th parallel branch comprising heat release heat exchanger；
Correspondingly, there are one control valve, the first end of the control valve and the heat supply networks for the hot net water backwater end setting
Water backwater end couples, and second end couples with third parallel branch, and third end couples with the 4th parallel branch；
Wherein, in third parallel branch further include a straight-through valve, the first end of the straight-through valve and the second of the control valve
End connection, second end couple with heat supply initial station；
Further include a straight-through valve, the third end of the first end of the straight-through valve and the control valve in 4th parallel branch
Connection, second end couple with the heat release heat exchanger.
Referring to Figure 10, Figure 11, Figure 12, the heat storage exchanger 13 and the heat supply 1 parallel connection of initial station obtain including institute
State the first parallel branch of heat supply initial station and the second parallel branch comprising heat storage exchanger 13；
Correspondingly, there are one control valve 20, the first ends of the control valve 20 for the output end setting of the main bleed steam pipework
Couple with the output end of the main bleed steam pipework, second end couples with the first parallel branch, and third end joins with the second parallel branch
It connects；
Wherein, in the first parallel branch further include a straight-through valve 22, the first end of the straight-through valve 22 and the control valve 20
Second end connection, second end and the heat supply 1 couple at first stop；
Further include a straight-through valve 23, the first end of the straight-through valve 23 and the control valve 20 in second parallel branch
Third end couples, and second end couples with the heat storage exchanger 13.
Wherein, the heat release heat exchanger 14 and heat supply 1 parallel connection of initial station, obtain the third for including heat supply initial station 1
Parallel branch and the 4th parallel branch comprising heat release heat exchanger 14；
Correspondingly, hot net water backwater end setting is there are one control valve 21, the first end of the control valve 21 with it is described
Hot net water backwater end couples, and second end couples with third parallel branch, and third end couples with the 4th parallel branch；
Wherein, in third parallel branch further include a straight-through valve 24, the first end of the straight-through valve 24 and the control valve 21
Second end connection, second end and the heat supply 1 couple at first stop；
Further include a straight-through valve 25, the first end of the straight-through valve 25 and the control valve 21 in 4th parallel branch
Third end couples, and second end couples with the heat release heat exchanger 14.
By the scheme recorded above it is found that the present embodiment two propose for heat supply water type extraction condensing type cogeneration unit
Heat reservoir is divided into storing discharging heat exchanger, and parallel, heat release is changed with heat supply initial station tandem, heat storage exchanger and heat supply initial station
Hot device is parallel with heat supply initial station with the parallel and storing discharging heat exchanger in heat supply initial station.Its structure is successively such as Fig. 1~Figure 12 institutes
Show.The heat reservoir includes heat storage exchanger 13, heat release heat exchanger 14, heat-storing device 15, circulating pump 16, control valve 17.Heat accumulation
Device 15, circulating pump 16, control valve 17 and heat storage exchanger 13 are unified into heat accumulation circuit 18, and circuit working medium is conduction oil or high pressure water
Deng.Heat-storing device 15, circulating pump 16, control valve 17 and heat release heat exchanger 14 are unified into heat release circuit 19, and circuit working medium is conduction oil
Or high pressure water etc..Heat storage exchanger 13 and heat supply initial station 1 in main bleed steam pipework with series connection (Fig. 1~Fig. 6) or parallel connection (Fig. 7~
Figure 12) mode couples, and main steam extraction is made to exchange heat respectively with circuit working medium and hot net water.Heat release heat exchanger 14 and heat supply initial station 1 are in heat
Coupled in a manner of series connection (Fig. 1~Fig. 3, Fig. 7~Fig. 9) or (Fig. 4~Fig. 6, Figure 10~Figure 12) in parallel in network pipeline, makes hot net water
It exchanges heat respectively with circuit working medium and main steam extraction.When circuit working medium in heat accumulation circuit 18 and heat release circuit 19 flows through heat-storing device 15
It exchanges heat with heat accumulation working medium therein.
Heat storage exchanger 13 and heat supply initial station 1 can connect (Fig. 1~Fig. 6) in main bleed steam pipework, heat storage exchanger 13
Upstream in heat supply initial station 1, its purpose is that：So that main steam extraction is first exchanged heat with higher temperature and circuit working medium, after with lower temperature
Degree exchanges heat with hot net water.
Heat storage exchanger 13 and heat supply initial station 1 also can in main bleed steam pipework in parallel (Fig. 7~Figure 12), its purpose is that：It can
By adjusting control valve 20 and straight-through valve 22 and 23, make part or all of main steam extraction with higher temperature and the heat exchange of circuit working medium and
Hot net water exchanges heat.
Heat release heat exchanger 14 and heat supply initial station 1 can connect (Fig. 1~Fig. 3, Fig. 7~Fig. 9) in heat supply network pipeline, heat release heat exchange
Device 14 is located at the upstream of heat supply initial station 1, its purpose is that：So that hot net water is first exchanged heat with lower temperature and circuit working medium, after with compared with
High temperature exchanges heat with main steam extraction.
Heat release heat exchanger 14 and heat supply initial station 1 also can in main bleed steam pipework in parallel (Fig. 4~Fig. 6, Figure 10~Figure 12),
Purpose is：Part or all of hot net water can be made with lower temperature and circuit by adjusting control valve 21 and straight-through valve 24 and 25
Working medium exchanges heat and main steam extraction heat exchange.
The phase transition temperature that heat accumulation working medium in heat-storing device 15 is selected need to be less than main steam extraction inlet temperature, be returned higher than hot net water
Coolant-temperature gage, such as phase transition temperature are 40 DEG C~500 DEG C of phase-change material, and Li Chu is：Not only heat can be absorbed from main steam extraction, but also
Heat can be discharged to hot net water.
In summary, the heat reservoir packet being used for for steam type extraction condensing type cogeneration unit that the embodiment of the present invention proposes
Include heat accumulation process and exothermic process.
Wherein, heat accumulation process is as shown in the bold portion of Fig. 2,5,8 and 11.During this heat accumulation, the entrance of control valve 17
End is connected to heat accumulation circuit outlet end.Under the driving of circulating pump 16, circuit working medium in heat accumulation circuit 18 with partly or entirely
Countercurrent flow occurs in heat storage exchanger 13 for main steam extraction, and coincidence circuit working medium stores heat in heat-storing device 15.It flows at this time
The main steam extraction for going out heat storage exchanger 13 will be fed directly at heat user.
Wherein, exothermic process is as shown in the bold portion of Fig. 3,6,9 and 12.In this exothermic process, the entrance of control valve 17
End is connected to heat release circuit outlet end.Under the driving of circulating pump 16, the circuit working medium in heat release circuit 19 is with cold water in heat release
Countercurrent flow occurs in heat exchanger 14, coincidence circuit working medium obtains heat from heat-storing device 15.Heat release heat exchanger is flowed out at this time
14 water, which will enter in heater 10, is heated to target temperature, is transported at heat user.
Embodiment three
In the present embodiment, above-mentioned heat reservoir is used for for steam type extraction condensing type cogeneration unit.
Referring to Figure 13~15, the system is used for for steam type extraction condensing type cogeneration unit；The heat storage exchanger 13
Couple with the output end of main bleed steam pipework；
Specifically, the output end setting of the main bleed steam pipework is there are one control valve 20, the first end of the control valve with
The output end of the main bleed steam pipework couples, and second end is coupled by a straight-through valve 22 with user's heat supply end (not shown),
Heating steam is provided to user's heat supply end, such as the heating steam 9 in Figure 13；Third end passes through a straight-through valve 23 and heat storage exchanger
13 connections.
10 coupled in series of the heat release heat exchanger 14 and heater, the heater 10 exchange heat for that will pass through the heat release
Target fluid working medium after the heating that device 14 exports is heated to target temperature.
Preferably, the transition temperature range of the heat accumulation working medium in the heat-storing device 15 is 40 DEG C~500 DEG C.
Referring to Figure 13~15.The heat reservoir includes：Heater 10, heat storage exchanger 13, heat release heat exchanger 14, heat accumulation dress
Set 15, circulating pump 16, control valve 17.Heat-storing device 15, circulating pump 16, control valve 17 and heat storage exchanger 13 are unified into heat accumulation circuit
18, circuit working medium is conduction oil or high pressure water etc..Heat-storing device 15, circulating pump 16, control valve 17 and heat release heat exchanger 14 are unified into
Heat release circuit 19, circuit working medium are conduction oil or high pressure water etc..Heat storage exchanger 13 is in a branch of main bleed steam pipework.It is logical
Control valve 20 and straight-through valve 22 and 23 are overregulated, partly or entirely main steam extraction line working medium heat exchange is made.Heat release heat exchanger 14 and plus
Hot device 10 couples in a series arrangement, and heating cold water to target temperature is to user's heat supply.In heat accumulation circuit 18 and heat release circuit 19
It exchanges heat with heat accumulation working medium therein when circuit working medium flows through heat-storing device 15.
Heat storage exchanger 13 in a branch of main bleed steam pipework, its purpose is that：It can be by adjusting control valve 20 and straight
Port valve 22 and 23 makes part or all of main steam extraction exchange heat with circuit working medium.
Heat release heat exchanger 14 and heater 10 are connected in pipeline, and heat release heat exchanger 14 is located at the upstream of heater 10,
Purpose is：So that cold water is first exchanged heat with lower temperature and circuit working medium, target temperature is heated to by heater 10.
The phase transition temperature that heat accumulation working medium in heat-storing device 15 is selected need to be less than main steam extraction inlet temperature, be higher than cold water temperature
Degree, such as phase transition temperature are 40 DEG C~500 DEG C of phase-change material, and benefit is：Not only heat can be absorbed from main steam extraction, but also can be to
Cold water discharges heat.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "upper", "lower" is base
It in orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than indicates or imply
Signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to this
The limitation of invention.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense.Example
Such as, can be fixedly connected, can also be detachable connection, or be integrally coupled；It can be mechanical attachment, can also be Electricity Federation
It connects；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.For this
For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Above example is only used to illustrate the technical scheme of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these are changed or replace
It changes, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of heat reservoir for extraction condensing type cogeneration unit, which is characterized in that including：
Heat storage exchanger, heat release heat exchanger, heat-storing device, circulating pump and control valve；
Wherein, heat storage exchanger, heat-storing device, circulating pump and control valve couple composition heat accumulation circuit successively；Heat release heat exchanger, storage
Thermal, circulating pump and control valve couple composition heat release circuit successively；
Wherein, heat storage exchanger couples with the output end of main bleed steam pipework；For heat accumulation circuit, control valve control and follow
Under the driving of ring pump, the main steam extraction that the circuit working medium in heat accumulation circuit is exported with the output end of main bleed steam pipework is in heat storage exchanger
It exchanges heat, and stores heat in heat-storing device；For heat release circuit, in the control of control valve and the driving of circulating pump
Under, the circuit working medium in heat release circuit is after obtaining heat with target fluid working medium to be heated in heat release heat exchanger in heat-storing device
It is middle to exchange heat.
2. system according to claim 1, which is characterized in that the system is used for heat supply water type extraction condensing type cogeneration machine
Group；
Correspondingly, the heat storage exchanger also couples with heat supply initial station；Wherein, the main steam extraction all occurs in heat storage exchanger
It is exported after heat exchange to heat supply initial station；
Or part exchanges heat in heat storage exchanger, another part is directly output to the heat supply initial station；
The heat release heat exchanger couples with heat supply initial station；Wherein, target fluid working medium to be heated is all sent out in heat release heat exchanger
It is exported after raw heat exchange to heat supply initial station；
Or part exchanges heat in heat storage exchanger, another part is directly output to the heat supply initial station.
3. system according to claim 2, which is characterized in that the heat storage exchanger and the heat supply initial station are connected connection
It connects, the heat release heat exchanger and heat supply initial station coupled in series.
4. system according to claim 2, which is characterized in that the heat storage exchanger and the heat supply initial station are connected connection
It connects, the heat release heat exchanger and the parallel connection of heat supply initial station.
5. system according to claim 2, which is characterized in that the heat storage exchanger is in parallel with heat supply initial station
It connects, the heat release heat exchanger and heat supply initial station coupled in series.
6. system according to claim 2, which is characterized in that the heat storage exchanger is in parallel with heat supply initial station
It connects, the heat release heat exchanger and the parallel connection of heat supply initial station.
7. system according to claim 1, which is characterized in that the system is used for for steam type extraction condensing type cogeneration machine
Group；The heat storage exchanger couples with the output end of main bleed steam pipework；
Specifically, there are one control valve, the first end of the control valve and the masters for the output end setting of the main bleed steam pipework
The output end of bleed steam pipework couples, and second end is coupled by a straight-through valve with user's heat supply end, third end by a straight-through valve and
Heat storage exchanger couples；
The heat release heat exchanger and heater coupled in series, the heater will be for that will pass through adding for heat release heat exchanger output
Target fluid working medium after heat is heated to target temperature.
8. system according to any one of claims 1 to 7, which is characterized in that the heat accumulation working medium in the heat-storing device
Transition temperature range be 40 DEG C~500 DEG C.
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| CN108613153A (en) * | 2018-05-16 | 2018-10-02 | 思安新能源股份有限公司 | A kind of heat reservoir |
| CN109139153B (en) * | 2018-07-27 | 2023-12-26 | 国能龙源蓝天节能技术有限公司 | Heat storage type auxiliary peak shaving heat supply system and method for coal-fired generator set |
| CN109869205B (en) * | 2019-03-26 | 2020-06-02 | 清华大学 | Heat storage, power generation and heat supply system for cogeneration unit |
| CN113503196B (en) * | 2021-06-25 | 2023-04-21 | 中国电建集团福建省电力勘测设计院有限公司 | Combined cycle cogeneration system based on integrated heat storage |
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| JPS6441793A (en) * | 1987-08-07 | 1989-02-14 | Toshiba Corp | Heat storage device |
| CN1963371A (en) * | 2006-12-06 | 2007-05-16 | 中国科学院电工研究所 | A solar high temperature modularization heat reservoir |
| CN101392736B (en) * | 2008-05-29 | 2011-09-14 | 中国科学技术大学 | Solar low-temperature thermal power generation and cold- thermal co-feeding system |
| CN203550483U (en) * | 2013-11-12 | 2014-04-16 | 攀枝花市农林科学研究院 | Solar drying device with auxiliary heating function |
| CN104456528A (en) * | 2014-11-05 | 2015-03-25 | 江苏太阳宝新能源有限公司 | Method and system for comprehensively utilizing stored energy and smart power grid |
| CN105114138B (en) * | 2015-08-12 | 2016-08-31 | 中国科学院工程热物理研究所 | A kind of low temperature energy-storing and power-generating system and operation method thereof |
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