CN109751652A - 300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system - Google Patents
300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system Download PDFInfo
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- CN109751652A CN109751652A CN201910209175.6A CN201910209175A CN109751652A CN 109751652 A CN109751652 A CN 109751652A CN 201910209175 A CN201910209175 A CN 201910209175A CN 109751652 A CN109751652 A CN 109751652A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 88
- 238000001816 cooling Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000008236 heating water Substances 0.000 claims abstract description 17
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims description 37
- 238000007906 compression Methods 0.000 claims description 37
- 238000010521 absorption reaction Methods 0.000 claims description 26
- 238000000605 extraction Methods 0.000 claims description 19
- 239000008400 supply water Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- 238000009510 drug design Methods 0.000 abstract description 2
- 238000010795 Steam Flooding Methods 0.000 description 8
- 230000009466 transformation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010009866 Cold sweat Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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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
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- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The invention discloses 300MW and ratings above wet type cooling unit high back pressure and heat pump united heating systems, the heating system includes high back pressure condenser, heat pump unit, peak load calorifier, 1# unit, 2# unit, feed pump turbine and small turbine, heating water return pipeline is connect by pipeline with the water inlet of high back pressure condenser, and heating return water carries out level-one heating in high back pressure condenser；The water outlet of high back pressure condenser is connected by pipeline and the water inlet of heat pump unit, and heating return water carries out second level heating in heat pump unit；The water outlet of heat pump unit is connected by the water inlet of pipeline and peak load calorifier.By the rational design to heat pump process, feed pump turbine exhausted spare heat or subsidiary engine cooling water heat effectively reduce the dosage of high-grade steam, expand external heat capacity as low order heat source for heat pump, and runing adjustment is flexible, and efficiency of energy utilization is high.
Description
Technical field
It is high using technical field, especially 300MW and ratings above wet type cooling unit that the present invention relates to low-grade industrial exhaust heats
Back pressure and heat pump united heating system.
Background technique
High back pressure circulating water heating technology is to improve the pressure of steam exhaust in condenser, the vacuum degree of reduction condenser, mention
Condenser is changed to the heat supply network heater of heating system by high coolant water temperature, and the recirculated water of heat supply network is directly used as cooling water,
The vaporization potentiality heat cycles water for making full use of condensing-type unit steam discharge, is reduced to zero for cold source energy, to improve unit
Thermal efficiency of cycle.Using this method heat supply, under the premise of not increasing unit generation capacity, reduces heat supply steam extraction amount, increases
Area of heat-supply service, remarkable in economical benefits.
From the point of view of the current domestic system parameter using low vacuum circulating water heating technology, since steam turbine is transported steadily in the long term
Exhaust temperature is not higher than 80 DEG C of limitation when row, considers condenser terminal difference, the recirculated water leaving water temperature of Heat Supplying with Low Vacuum is generally not
Higher than 75 DEG C, supply water temperature range be generally 60-75 DEG C, return water temperature range be generally 40-55 DEG C, corresponding operation back pressure is
25-45kPa。
The steam discharge of the feed pump turbine of conventional 300MW and ratings above wet type cooling unit is directly discharged into main condenser, so
Cooling cycle is carried out by the recirculated water of water tower afterwards, the driving steam of feed pump turbine is that the 0.5MPa or more of main steam turbine is pressed
The steam extraction of power.For high back pressure thermal power plant unit, if using same steam supply and the type of cooling, non-heating period, i.e. pure condensate
Operating condition can run as low back pressure routine pure condensate unit, will not be influenced by any factor, but arrived Heating Period, i.e. highback
Press operating condition, heat supply will be carried out using high back pressure, due to the raising of main steam turbine back pressure will lead to feed pump turbine into vapour pressure
Power and corresponding exhaust steam pressure increase, and the power output of feed pump turbine will reduce, the revolving speed of feed pump turbine itself
Deviate design value, cause vibration to aggravate, influence unit safety operation, Tong Liao area must be carried out to feed pump turbine at this time,
Whole high-low pressure nozzles, rotor, partition are replaced, this not only adds the workloads of dismounting components, unit safety operation is influenced,
Also add a large amount of investment.
At this stage, clammy fired power generating unit high back pressure transformation problems faced has, first, feed pump turbine exhaust steam pressure without
The problem of method matches, needs to be transformed small machine ontology and corresponding pipeline, more exchanging rotor or the individual condenser of increase；The
Two, feed pump turbine ontology and corresponding pipeline are transformed, Heating Season and non-heating season need replacing rotor, project amount compared with
Greatly, investment is larger, and needs small machine vapour source being adjusted to high pressure cylinder steam discharge, reduces unit cycle efficieny；Third, setting are special
Feed pump turbine condenser, counter investment is larger, system complex, and small machine steam exhaust can not utilize, and the 4th, it is existing
For wet type cooling unit subsidiary engine cooling water heat temperature generally at 30-40 DEG C, grade is lower, it is difficult to directly utilize.
Summary of the invention
The object of the present invention is to provide 300MW and ratings above wet type cooling unit high back pressure and heat pump united heating systems,
300MW and ratings above wet type cooling unit tow taste heat can not be utilized directly at this stage, unit high back pressure is transformed and water supply for solution
Pump the technical problems such as steam turbine exhaust pressure can not match, energy utilization rate is low.
To achieve the above object, the present invention adopts the following technical scheme: one aspect of the present invention provides 300MW and ratings above
Wet type cooling unit high back pressure and heat pump united heating system, the heating system include that high back pressure condenser, heat pump unit, spike add
Hot device, 1# unit, 2# unit, feed pump turbine and small turbine, heating water return pipeline pass through pipeline and high back pressure condenser
Water inlet connection, heating return water carries out level-one heating in high back pressure condenser；
The water outlet of high back pressure condenser is connected by the water inlet of pipeline and heat pump unit, heating return water in heat pump unit into
The heating of row second level；
The water outlet of heat pump unit is connected by the water inlet of pipeline and peak load calorifier；Heating return water in peak load calorifier into
The heating of row three-level；The driving heat source of heat pump unit is the high-grade steam in extraction for heat supply main pipe, and low level heat energy is water supply mercury vapour
Turbine discharge waste heat；
The water outlet of peak load calorifier connects heating water supply line, and the driving heat source of peak load calorifier is small steam turbine exhaust steam or pumping
High-grade steam in vapour heat supply main pipe.(heating return water is finally heated to after supply water temperature through heating water supply line
Send out steam power plant.
Further, it is arranged between the pipeline of high back pressure condenser water inlet and the pipeline of high back pressure condenser water outlet
There is the first bypass pipe；The first by-passing valve is additionally provided on first bypass pipe.
Further, 300MW and ratings above wet type cooling unit, one has carried out high back pressure transformation, and another is normal back pressure.
Further, 300MW and ratings above wet type cooling unit, feed pump are dragged with steam turbine.
Further, the driving heat source of high back pressure condenser is 1# unit 25-45 kPa steam exhaust.
Further, the heating water supply water temperature of peak load calorifier water outlet is less than or equal to 130 DEG C.
Further, small steam turbine exhaust steam pressure is 0.11 MPa-0.25MPa(absolute pressure).
Further, feed pump turbine exhaust steam pressure is 4.9-20kPa(absolute pressure).
Further, heat pump unit is absorption heat pump；The pipeline of absorption heat pump water inlet and the pipeline of water outlet
Between be provided with the second bypass pipe；The second by-passing valve is provided on second bypass pipe.
Further, heat pump unit includes compression heat pump and surface exchanger；The driving heat source of compression heat pump is steam extraction
High-grade steam in heat supply main pipe, the low level heat energy of compression heat pump are the steam exhaust of feed pump turbine discharge；
The heating return water that primary heating is completed in high back pressure condenser enters the water inlet of compression heat pump, compression by pipeline
Formula heat pump water outlet is connected to by pipeline with the water inlet of surface exchanger, and the water outlet of surface exchanger passes through pipeline and point
The water inlet of peak heater is connected to.
Further, is provided between the pipeline of compression heat pump water inlet and the pipeline of compression heat pump water outlet
Three bypass pipes；Third by-passing valve is additionally provided on third bypass pipe.
Further, normal pressure condenser is provided between feed pump turbine and compression heat pump, in normal pressure condenser and pressure
Partial circulating cooling water pump is provided between contracting formula heat pump, feed pump turbine exhausted spare heat is heated by normal pressure condenser through compressing
Formula heat pump extracts the cooling circulating water after heat, recycles in cycles.
Further, heat pump unit includes compression heat pump and surface exchanger；The driving heat source of compression heat pump is steam extraction
High-grade steam in heat supply main pipe, the low level heat energy of compression heat pump are auxiliary machine circulating cooling waters.
Another aspect of the present invention provides 300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, packet
Include high back pressure condenser, heat pump unit, peak load calorifier, 1# unit, 2# unit feed pump turbine and small turbine；Heating is returned
Waterpipe is connect by pipeline with the water inlet of high back pressure condenser, and heating return water carries out level-one in high back pressure condenser and adds
Heat；High back pressure condenser water outlet is connected by pipeline and the water inlet of heat pump unit, and heating return water carries out in heat pump unit
Second level heating；The water outlet of heat pump unit is connected by the water inlet of pipeline and peak load calorifier, and heating return water is heated in spike
Three-level heating is carried out in device, the water outlet of peak load calorifier accesses heating water supply line；
Small steam turbine exhaust steam main line is provided with the first branch pipe and the second branch pipe, and steam discharge is sent into absorption heat pump by the first branch pipe,
Driving heat source as absorption heat pump；
The driving heat source of peak load calorifier is that the second branch pipe of the high-grade steam or small turbine in extraction for heat supply main pipe is sent out
Steam discharge.
Further, bypath valve is provided on the first branch pipe and the second branch pipe.
The beneficial effects of the present invention are embodied in:
1, existing 300MW and ratings above wet type cooling unit are general only to carry out high back pressure transformation, Ling Yitai to a wherein unit
Do not adjust transformation, and facing can not matching problem with feed pump turbine exhaust steam pressure.The present invention provides 300MW and ratings above
Wet type cooling unit high back pressure and heat pump united heating system pass through the rational design to heat pump process, feed pump turbine row
Vapour waste heat or subsidiary engine cooling water heat effectively reduce the dosage of high-grade steam, expand external heat supply as low order heat source for heat pump
Ability, runing adjustment is flexible, and efficiency of energy utilization is high.
2, by the way that using the steam discharge of small turbine as the driving steam of absorption heat pump, absorption heat pump runing time can
To greatly prolong.
3, low level heat energy of the subsidiary engine cooling water heat as steam drive compression heat pump increases external heat capacity.
4, wet type cooling unit high back pressure and heat pump united heat supply are realized and are made full use of to low-grade heat source, are returned to heating
Water has carried out step heating, reduces heat transfer process irreversible loss, and operating cost is low.
System provided by the invention can sufficiently recycle feed pump turbine exhausted spare heat and subsidiary engine cooling water heat, step
Heating, runing adjustment is flexible, and efficiency of energy utilization is high.
Other features and advantages of the present invention will be illustrated in the following description, and partly becomes from specification
It is clear that understand through the implementation of the invention.The main object of the present invention and further advantage can be by the description
Specifically noted scheme is achieved and obtained.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is the flow diagram of the embodiment of the present invention one.
Fig. 2 is the flow diagram of the embodiment of the present invention two.
Fig. 3 is the flow diagram of the embodiment of the present invention three.
Fig. 4 is the flow diagram of the embodiment of the present invention four.
Appended drawing reference: 1-1# unit, 2-2# unit, 3- small turbine, the first by-passing valve of 4-, the second by-passing valve of 5-, 6-
Three by-passing valves, the 4th by-passing valve of 7-, the 5th by-passing valve of 8-, 9- high back pressure condenser, 10- absorption heat pump, the heating of 11- spike
Device, 12- feed pump turbine, 13- compression heat pump, 14- surface exchanger, 15- partial circulating cooling water pump, 16- extraction for heat supply
Main pipe.
Specific embodiment
Carry out the technical solution that the present invention will be described in detail by the following examples, embodiment below is only exemplary,
It is only capable of for explanation and illustration technical solution of the present invention, and the limitation to technical solution of the present invention cannot be construed to.
300MW and ratings above wet type cooling unit, one has carried out high back pressure transformation, and another is normal back pressure.300MW and
Ratings above wet type cooling unit, feed pump are dragged with steam turbine.
Embodiment 1
As shown in Figure 1,300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, including high back pressure condensing
Device 9, absorption heat pump 10, peak load calorifier 11,1# unit 1,2# unit 2, feed pump turbine 12 and small turbine 3.
Heat supply network supplies water after exchanging heat with the terminal temperature difference of thermal substation, by flowing back to steam power plant for hot water return line.Then
Heating water return pipeline is connect by pipeline with the water inlet of high back pressure condenser 9, and heating return water carries out in high back pressure condenser 9
Level-one heating heats up；
The water outlet of high back pressure condenser 9 is connect by pipeline with the water inlet of absorption heat pump 10, and absorption heat pump 10 is intake
Mouthful at pipeline and water outlet pipeline between be provided with the second bypass pipe；The second by-passing valve 5 is provided on second bypass pipe.
Heating return water carries out the heating and continuous heating of second level in absorption heat pump 10；Absorption heat pump 10 is that ultralow pressure steam can drive
It is dynamic, it is greater than 0.11MPa(absolute pressure) more than.High back pressure condenser 9 is according to the different operating conditions of heat supply network return water temperature, in real time
Adjust its load.
Wherein, the low level heat energy of absorption heat pump 10 is 12 exhausted spare heat of feed pump turbine, exhaust steam pressure 4.9-
20kPa absolute pressure.Source is the high-grade steam in extraction for heat supply main pipe 16.The water outlet of absorption heat pump 10 by pipeline with
The water inlet of peak load calorifier 11 connects, and heating return water carries out being less than after three-level heating in peak load calorifier 11 being equal to
130 DEG C of discharge temperature is sent out.
The water outlet access heating water supply line of peak load calorifier 11 simultaneously sends out steam power plant, recycles in cycles.Spike adds
The driving heat source of hot device 11 is 3 steam discharge of 0.5Mpa or more high-grade steam or small turbine in extraction for heat supply main pipe 16.Small vapour
3 exhaust steam pressure of turbine is 0.11 MPa-0.25MPa(absolute pressure).
Specifically, the heat source of high back pressure condenser 9 is the 1 25kPa-45kPa steam exhaust of 1# unit.High back pressure condenser 9 is intake
The first bypass pipe is provided between the pipeline of 9 water outlet of pipeline and high back pressure condenser at mouthful；It is also set on first bypass pipe
It is equipped with normally closed first by-passing valve 4, when 9 failure of high back pressure condenser is exited and put into operation, the first by-passing valve 4 is opened.
It is provided with the 4th bypass pipe between extraction for heat supply main pipe 16 and peak load calorifier 11, is additionally provided on the 4th bypass pipe
4th by-passing valve 7.The 5th by-passing valve 8 is provided between extraction for heat supply main pipe 16 and small turbine 3.
Embodiment 2,300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, with embodiment 1, difference
It is in shown in Figure 2.Heat pump unit can be the absorption heat pump 10 of ultralow pressure driving, and driving heat source is small steamer
3 steam discharge of machine, exhaust steam pressure are 0.11 MPa-0.25MPa(absolute pressure)；Low level heat energy is 12 steam discharge of feed pump turbine, row
Steam pressure is 4.9-20kPa(absolute pressure).
Heating water return pipeline is connect by pipeline with the water inlet of high back pressure condenser 9, and heating return water is in high back pressure condensing
Level-one heating is carried out in device 9；9 water outlet of high back pressure condenser is connect by pipeline with the water inlet of absorption heat pump 10, heating
Return water carries out second level heating in absorption heat pump 10；The water outlet of absorption heat pump 10 passes through pipeline and peak load calorifier 11
Water inlet connection, heating return water carry out three-level heating in peak load calorifier 11, and peak load calorifier 11 is finally by heating return pipe
After road is heated to supply water temperature, steam power plant is sent out by heating water supply line, is recycled in cycles.
3 steam discharge main line of small turbine is provided with the first branch pipe and the second branch pipe, wherein steam discharge is sent by the first branch pipe to be inhaled
Receipts formula heat pump 10, the driving heat source as absorption heat pump 10；The low level heat energy of absorption heat pump 10 is feed pump turbine 12
Steam discharge.The driving heat source of peak load calorifier 11 be extraction for heat supply main pipe 16 on high-grade steam or small turbine 3 through second
The steam discharge that pipe is sent out.
Embodiment 3,300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, with embodiment 1, difference
It is in shown in Figure 3.Heat pump unit includes compression heat pump 13 and surface exchanger 14.Heating water return pipeline passes through pipe
Road is connect with the water inlet of high back pressure condenser 9, and heating return water carries out level-one heating in high back pressure condenser 9；
9 water outlet of high back pressure condenser is connect by pipeline with the water inlet of heat pump unit internally compressed heat pump 13, compression type heat
The water outlet of pump 13 extracts steam drive compression by the water inlet connection surface heat exchanger 14 of pipeline and surface exchanger 14
13 small turbine of heat pump, 3 exhaust steam heat；
The water outlet of surface exchanger 14 is connect by pipeline with the water inlet of peak load calorifier 11；Heating return water is heated in spike
Level Four heating is carried out in device 11.The water outlet connection heating water supply line of peak load calorifier 11 simultaneously sends out steam power plant, in cycles
Circulation.
The low level heat energy of compression heat pump 13 is the 4.9Kpa steam exhaust that feed pump turbine 12 is discharged, and driving heat source is steam extraction
High-grade steam (steam of 0.5MPa or more) in heat supply main pipe 16.82 DEG C of 13 maximum water temperature of compression heat pump and with
On, the steam discharge of steam drive compression heat pump 13 carries out surface exchanger 14 to be heated to 110 DEG C or more.
Specifically, being arranged between the pipeline of 13 water outlet of pipeline and compression heat pump of 13 water inlet of compression heat pump
There is third bypass pipe；Third by-passing valve 6 is additionally provided on third bypass pipe.Between feed pump turbine 12 and compression heat pump 13
It is provided with normal pressure condenser, partial circulating cooling water pump 15, feed pump are provided between normal pressure condenser and compression heat pump 13
12 exhausted spare heat of steam turbine heats the cooling circulating water after compression heat pump 13 extracts heat, Zhou Erfu by normal pressure condenser
Begin circulation.Partial circulating cooling water pump 15 is additionally provided between feed pump turbine 12 and compression heat pump 13.
Embodiment 4,300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, with embodiment 3, difference
It is in shown in Figure 4.The low level heat energy of compression heat pump 13 is 12 recirculated cooling water of feed pump turbine, driving heat source
For the high-grade steam (steam of 0.5MPa or more) in extraction for heat supply main pipe 16.82 DEG C of 13 maximum water temperature of compression heat pump
Or more, the steam discharge of steam drive compression heat pump 13 carries out surface exchanger 14 to be heated to 110 DEG C or more.
In above-described embodiment 1-4, the heat pump unit may include: 82 DEG C of highest outlet temperature or more steam drive from
The steam drive absorption heat pump 10 of heart compression heat pump 13 or 95 DEG C of highest outlet temperature or more.And wherein, time of heat supply network
Water cascade and high back pressure condenser 9,82 DEG C of highest outlet temperature or more of steam drive centrifugal compression-type heat pump 13 or outlet temperature
The steam drive absorption heat pump 10 and peak load calorifier 11 of 95 DEG C of degree or more exchange heat, and pass through after being heated to heat supply temperature
Heat supply water supply line sends out steam power plant.Shut-off valve is provided in extraction for heat supply main pipe 16.
To sum up, the present invention is in steam power plant by the way of the combination of high back pressure condenser 9, heat pump unit and peak load calorifier 11
Recycle the mode of the return water of steam power plant's waste heat and heat supply network of stepped heating, the one side effective recycling cold end of steam power plant
Loss, efficiency of energy utilization is high, and various ways are heated in another aspect high back pressure, heat pump and steam extraction, and runing adjustment is flexible, to mention
High system comprehensive energy utilization efficiency reduces heat cost.
The foregoing is merely the preferable specific embodiments of the present invention, but scope of protection of the present invention is not limited thereto,
The change or replacement that anyone skilled in the art is expected in the technical scope disclosed by the present invention should all be contained
Lid is within protection scope of the present invention.
Claims (10)
1.300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, it is characterised in that: the heating system
Including high back pressure condenser (9), heat pump unit, peak load calorifier (11), 1# unit (1), 2# unit (2), feed pump turbine
(12) it is connect by pipeline with the water inlet of high back pressure condenser (9) with small turbine (3), heating water return pipeline, heating return water
Level-one heating is carried out in high back pressure condenser (9)；
The water outlet of high back pressure condenser (9) is connected by pipeline and the water inlet of heat pump unit, and heating return water is in heat pump unit
Interior progress second level heating；
The water outlet of heat pump unit is connect by pipeline with the water inlet of peak load calorifier (11)；Heating return water is in peak load calorifier
(11) three-level heating is carried out in；The driving heat source of heat pump unit is the high-grade steam on extraction for heat supply main pipe (16), low level heat
Source is feed pump turbine (12) exhausted spare heat；
The water outlet of peak load calorifier (11) connects heating water supply line, and the driving heat source of peak load calorifier (11) is small turbine
(3) high-grade steam in steam discharge or extraction for heat supply main pipe (16).
2. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, is provided between the pipeline of high back pressure condenser (9) water inlet and the pipeline of high back pressure condenser (9) water outlet
Bypass line；The first by-passing valve (4) are additionally provided on first bypass pipe.
3. 300MW as claimed in claim 2 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, the driving heat source of high back pressure condenser (9) is 1# unit (1) 25kPa-45kPa steam exhaust.
4. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, the heating water supply water temperature of peak load calorifier (11) water outlet is less than or equal to 130 DEG C.
5. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, small turbine (3) exhaust steam pressure is 0.11 MPa-0.25MPa.
6. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, feed pump turbine (12) exhaust steam pressure is 4.9-20kPa.
7. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, heat pump unit is absorption heat pump (10)；The pipeline of the pipeline of absorption heat pump (10) water inlet and water outlet it
Between be provided with the second bypass pipe；The second by-passing valve (5) are provided on second bypass pipe.
8. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, heat pump unit includes compression heat pump (13) and surface exchanger (14)；The driving heat source of compression heat pump (13) is to take out
High-grade steam in vapour heat supply main pipe (16), the low level heat energy of compression heat pump (13) are feed pump turbine (12) discharges
Steam exhaust；
The heating return water that primary heating is completed in high back pressure condenser (9) enters the water inlet of compression heat pump (13) by pipeline
Mouthful, compression heat pump (13) water outlet is connected to by pipeline with the water inlet of surface exchanger (14), surface exchanger (14)
Water outlet be connected to the water inlet of peak load calorifier (11) by pipeline.
9. 300MW as described in claim 1 and ratings above wet type cooling unit high back pressure and heat pump united heating system, feature
It is, heat pump unit includes compression heat pump (13) and surface exchanger (14)；The driving heat source of compression heat pump (13) is to take out
The low level heat energy of high-grade steam in vapour heat supply main pipe (16), compression heat pump (13) is auxiliary machine circulating cooling water.
10.300MW and ratings above wet type cooling unit high back pressure and heat pump united heating system, which is characterized in that including high back pressure
Condenser (9), heat pump unit, peak load calorifier (11), 1# unit (1), 2# unit (2) feed pump turbine (12) and small steamer
Machine (3)；Heating water return pipeline is connect by pipeline with the water inlet of high back pressure condenser (9), and heating return water is in high back pressure condensing
Level-one heating is carried out in device (9)；High back pressure condenser (9) water outlet is connected by pipeline and the water inlet of heat pump unit, heating
Return water carries out second level heating in heat pump unit；The water outlet of heat pump unit passes through the water inlet of pipeline and peak load calorifier (11)
Connection, heating return water carry out three-level heating in peak load calorifier (11), and the water outlet access heating of peak load calorifier (11) supplies
Waterpipe；
Small turbine (3) steam discharge main line is provided with the first branch pipe and the second branch pipe, and steam discharge is sent into absorption type heat by the first branch pipe
It pumps (10), the driving heat source as absorption heat pump (10)；
The driving heat source of peak load calorifier (11) is the of the high-grade steam or small turbine (3) on extraction for heat supply main pipe (16)
The steam discharge that two branch pipes are sent out.
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| CN201910209175.6A CN109751652B (en) | 2019-03-19 | 2019-03-19 | High back pressure and heat pump combined heat supply system of 300MW and above grade wet cooling unit |
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| CN201910209175.6A CN109751652B (en) | 2019-03-19 | 2019-03-19 | High back pressure and heat pump combined heat supply system of 300MW and above grade wet cooling unit |
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| CN109751652B CN109751652B (en) | 2024-02-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664491A (en) * | 2020-07-09 | 2020-09-15 | 哈尔滨汽轮机厂辅机工程有限公司 | Multi-unit coupled waste heat cascade utilization heat supply network system and method |
| CN114963274A (en) * | 2022-06-21 | 2022-08-30 | 西安西热节能技术有限公司 | Wind, light, electricity and ground thermal coupling distributed heating system and method |
| CN115247826A (en) * | 2022-07-25 | 2022-10-28 | 西安西热节能技术有限公司 | High back pressure heat supply unit thermodynamic system of coupling voltage compression heat pump |
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| CN114963274A (en) * | 2022-06-21 | 2022-08-30 | 西安西热节能技术有限公司 | Wind, light, electricity and ground thermal coupling distributed heating system and method |
| CN115247826A (en) * | 2022-07-25 | 2022-10-28 | 西安西热节能技术有限公司 | High back pressure heat supply unit thermodynamic system of coupling voltage compression heat pump |
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