CN208253695U - A kind of power plant's step heating system based on absorption heat pump and steam jet ejector - Google Patents
A kind of power plant's step heating system based on absorption heat pump and steam jet ejector Download PDFInfo
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- CN208253695U CN208253695U CN201820427972.2U CN201820427972U CN208253695U CN 208253695 U CN208253695 U CN 208253695U CN 201820427972 U CN201820427972 U CN 201820427972U CN 208253695 U CN208253695 U CN 208253695U
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 85
- 238000010438 heat treatment Methods 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 95
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 16
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000005086 pumping Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
Power plant's step heating system based on absorption heat pump and steam jet ejector that the utility model discloses a kind of, including steam turbine, condenser, cooling tower, absorption heat pump, first order steam jet ejector, second level steam jet ejector and the first heat-exchange device；The steam exhaust outlet of steam turbine is connect with first order steam jet ejector；The steam extraction outlet of steam turbine is connect with absorption heat pump, is also connect with first order steam jet ejector and second level steam jet ejector；First order steam jet ejector and the series connection of second level injector, and connect respectively with the first heat-exchange device；Heat supply network return water is connect with absorption heat pump, and absorption heat pump is connect with the first heat-exchange device, and the water outlet of the first heat-exchange device feeds to heat user.The utility model can be with heat supply temperature demand difference, the operation order and mode of flexible modulation absorption heat pump, steam jet ejector and heat-exchange device, to control heat supply temperature in Heating Period.
Description
Technical field
The utility model relates to residual heat of electric power plant recycling and heat supply process fields, and in particular to one kind is based on absorption type heat
Power plant's step heating system of pump and steam jet ejector.
Background technique
Cogeneration of heat and power is the principal mode of central heating, and cogeneration of heat and power is because unit heating coal consumption is far below region boiler and each
Class disperses ways of heating, is the highest heat resource form of energy conversion efficiency generally acknowledged at present.
Currently, there are three types of modes for the heat-supplying mode of power plant, added one is directlying adopt middle row's steam extraction by heat exchangers for district heating
The mode of heat supply network recirculated water has the characteristics that heat supply temperature is relatively high and invests fewer；But it can make in this way
It is lost at the condensation heat loss and exhaust steam residual heat of steam drainage；The second is this mode is to remove vapour using high back pressure heat-supplying mode
Turbine low pressure (LP) cylinder exhaust stage blade improves exhaust steam pressure and temperature, directly heats heat supply network recirculated water by condenser using steam discharge；This
The applicable heat supply network return water temperature of mode is relatively low and supply water temperature is not high, but its flexible adjustment is not high, and needs sufficiently large
Thermal loads；The third is using heat pump recovery waste heat heat-supplying mode, this mode is the remaining of recycling condensation recirculated water or steam exhaust
Heat directly heats heat supply network recirculated water, this mode is also applied for that heat supply network return water temperature is relatively low and supply water temperature is not high, but also can
Cause the condensation heat loss of steam drainage.
No matter which kind of above-mentioned heating form, require using a large amount of high-quality steam, have in terms of energy conservation certain bad
Gesture will cause hydrophobic condensation heat loss.Meanwhile above-mentioned heat-supplying mode is to the bad adaptability that is flexibly matched with of thermic load, Bu Nenggen
Heat-supplying mode is adjusted according to the variation of heat supply network thermic load, causes energy utilization rate low, the economy of unit is deteriorated.
Utility model content
Aiming at the problems existing in the prior art, the purpose of this utility model is to provide one kind based on absorption heat pump and
Power plant's step heating system of steam jet ejector, can reduce in row and high row's extraction high-quality steam, to solve heat supply temperature
The problem of flexible adjustment difference.
In order to achieve the above object, the utility model is achieved using following technical scheme.
A kind of power plant's step heating system based on absorption heat pump and steam jet ejector, including it is steam turbine, condenser, cold
But tower, absorption heat pump, first order steam jet ejector, second level steam jet ejector and the first heat-exchange device；The steam turbine
Steam exhaust outlet connect with the steam inlet of the condenser, the condenser recycle water inlet and the cooling tower well
Connection, the circulating water outlet of the condenser are connect with the evaporator inlet of the absorption heat pump, the absorption heat pump
Evaporator outlet is connect with the well of the cooling tower；The steam turbine steam exhaust outlet also with the first order steam jet ejector
Driving fluid entrance connection；The steam extraction outlet of the steam turbine is connect with the generator inlet of the absorption heat pump；It is described
The Working-fluid intaking of first order steam jet ejector, the second level steam jet ejector Working-fluid intaking respectively with the vapour
The steam extraction of turbine exports connection；The driving fluid entrance of the second level steam jet ejector and the first order steam jet ejector
Fluid-mixing outlet connection；The fluid-mixing outlet of the first order steam jet ejector, the second level steam jet ejector it is mixed
Fluid outlet is closed also to connect with the steam inlet of first heat-exchange device respectively；The outlet of heat supply network return water passes through water return pipeline
It is connect with the absorber entrance of the absorption heat pump, the condensator outlet of the absorption heat pump and first heat exchange fill
The water inlet connection set, the water outlet of first heat-exchange device are connect by heat supply pipeline with the entrance that heat supply network supplies water.
The characteristics of the utility model and further improvement lies in that:
Power plant's step heating system based on absorption heat pump and steam jet ejector further includes the second heat-exchange device,
The steam inlet of second heat-exchange device and the steam extraction of the steam turbine are exported and are connected, and second heat-exchange device enters
The mouth of a river is connect with the water outlet of first heat-exchange device, the water outlet of second heat-exchange device by heat supply pipeline with
The entrance connection that heat supply network supplies water.
It is arranged at the first heat-exchange device between the first order steam jet ejector and first heat-exchange device
There is the first valve.
The fluid-mixing outlet of the first order steam jet ejector and the driving fluid of the second level steam jet ejector enter
The second valve is provided at the steam jet ejector of the second level between mouthful.
The steam extraction of the steam turbine, which is exported, is arranged third between the Working-fluid intaking of the second level steam jet ejector
Valve.
The steam extraction of the steam turbine, which is exported, is provided with the 4th valve between the steam inlet of second heat-exchange device.
First heat-exchange device is heat exchangers for district heating.
Second heat-exchange device is peak load calorifier.
The generator exports of the absorption heat pump are connected to drain tank by pipeline.
The steam (vapor) outlet of first heat-exchange device is connected to drain tank by pipeline.
The steam (vapor) outlet of second heat-exchange device is connected to drain tank by pipeline.
Circulating pump is connected between circulation water inlet and the well of the cooling tower of the condenser.
Recirculated water water return pipeline, institute are additionally provided between the circulating water outlet of the condenser and the well of the cooling tower
It states and is provided with valve on recirculated water water return pipeline.
Compared with prior art, the utility model has the following beneficial effects:
Power plant's step heating system based on absorption heat pump and steam jet ejector of the utility model, can be with Heating Period
Interior heat supply temperature demand is different, the operation order and mode of flexible modulation absorption heat pump, steam jet ejector and heat-exchange device,
To control heat supply temperature.In the process, circulating water afterheat can also be recycled, the cold end loss of unit is reduced, reduces simultaneously
The pumping of middle row or high row, improve the economy of unit and the utilization efficiency of non-renewable energy, reduce the use cost of user；
In addition, it is poor to also reduce temperature gradient of hot net water during circulating-heating, to reduceLoss.
Detailed description of the invention
The utility model is described in further details in the following with reference to the drawings and specific embodiments.
Fig. 1 is a kind of reality of power plant's step heating system based on absorption heat pump and steam jet ejector of the utility model
Apply the structural schematic diagram of example；
Fig. 2 is the structural schematic diagram of the first steam jet ejector or the second steam jet ejector in Fig. 1.
In figure: 1 steam turbine；2 condensers；3 cooling towers；4 absorption heat pumps；5 first order steam jet ejectors；6 first heat are handed over
Changing device；7 second level steam jet ejectors；8 second heat-exchange devices；9 circulating pumps；10 wells；11 drain tanks；12 first valves；
13 second valves；14 third valves；15 the 4th valves；16 boilers；17 Working-fluid intakings；18 driving fluid entrances；19 mixing
Fluid outlet.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with embodiment, but those skilled in the art
Member will be understood that the following example is merely to illustrate the utility model, and be not construed as limitation the scope of the utility model.
As shown in Figure 1, the utility model provide it is a kind of based on power plant's step of absorption heat pump and steam jet ejector supply
Hot systems, including steam turbine 1, condenser 2, cooling tower 3, absorption heat pump 4, first order steam jet ejector 5, the first heat exchange dress
Set 6；The steam exhaust outlet of the steam turbine 1 is connect with the steam inlet of the condenser 2, the circulation water inlet of the condenser 2
It is connect with the well 10 of the cooling tower 3, the circulating water outlet of the condenser 2 and the evaporator of the absorption heat pump 4 enter
Mouth connection, the evaporator outlet of the absorption heat pump 4 are connect with the well 10 of the cooling tower 3；The steam exhaust of the steam turbine 1
Outlet is also connect with the driving fluid entrance 18 of the first order steam jet ejector 5；The steam turbine 1 steam extraction outlet with it is described
The generator inlet of absorption heat pump 4 connects；The Working-fluid intaking 17 of the first order steam jet ejector 5, the second level
The Working-fluid intaking 17 of steam jet ejector 7 exports with the steam extraction of the steam turbine 1 connect respectively；The second level steam injection
The driving fluid entrance 18 of device 7 is connect with the fluid-mixing of the first order steam jet ejector 5 outlet 19；The first order steam
The fluid-mixing outlet 19 of injector 5, the fluid-mixing of the second level steam jet ejector 7 outlet 19 are also respectively with described first
The steam inlet of heat-exchange device 6 connects；The outlet of heat supply network return water passes through the absorber of water return pipeline and the absorption heat pump 4
Entrance connection, the condensator outlet of the absorption heat pump 4 connect with the water inlet of first heat-exchange device 6, and described the
The water outlet of one heat-exchange device 6 is connect by heat supply pipeline with the entrance that heat supply network supplies water.
Wherein, close to the first heat-exchange device between the first order steam jet ejector 5 and first heat-exchange device 6
The first valve 12 is provided at 6.
The fluid-mixing outlet 19 of the first order steam jet ejector 5 and the flow type pump with injection of the second level steam jet ejector 7
The second valve 13 is provided at the second steam jet ejector between body entrance 18.
Further, power plant's step heat supply provided by the utility model based on absorption heat pump 4 and steam jet ejector
System further includes the second heat-exchange device 8, and the steam inlet of second heat-exchange device 8 and the steam extraction of the steam turbine 1 go out
Mouth connection, the water inlet of second heat-exchange device 8 are connect with the water outlet of first heat-exchange device 6, and described second
The water outlet of heat-exchange device 8 is connect by heat supply pipeline with the entrance that heat supply network supplies water.
Wherein, between the steam extraction outlet and the Working-fluid intaking 17 of the second level steam jet ejector 7 of the steam turbine 1
Third valve 14 is set.
The steam extraction of the steam turbine 1, which is exported, is provided with the 4th valve between the steam inlet of second heat-exchange device 8
Door 15.
In power plant's step heating system based on absorption heat pump 4 and steam jet ejector of the utility model, the first heat is handed over
Changing device 6 is heat exchangers for district heating, is also possible to other primary calorifiers, can meet base heating load demand；Second heat exchange dress
8 are set as peak load calorifier 7, can satisfy the demand of cold season thermic load, guarantees heating quality.
In addition, in power plant's step heating system based on absorption heat pump 4 and steam jet ejector of the utility model, condensing
It is connected between the circulation water inlet of device 2 and the well 10 of cooling tower 3 by circulating pump 9, circulating pump 9 is by the well 10 of cooling tower 3
Interior recirculated water is delivered in condenser 2.Recirculated water in condenser 2 can be also passed directly into cold by the valvular pipeline of setting
But in the well 10 of tower 3, the recirculated water in condenser 2 can be controlled to adjust by valve and be passed through the amount in the first absorption heat pump 4.
The utility model be based on steam jet ejector, steam jet ejector be one kind be widely used in petroleum, chemical industry, refrigeration and
The important equipment of food industry.The structure of steam jet ejector is simple, without moving component, it by the quality of a series of complex,
Momentum and energy exchange, it is jetting steam caused using high pressure-temperature working steam volume suction low-pressure low-temperature, form one middle pressure medium temperature
Mixed vapour have certain applying value in Heat Supply Engineering to realize the compression to low-pressure injection steam, it can be with
In the case where steam turbine 1 is not transformed, the back pressure of part steam exhaust is improved, for heating heat supply network recirculated water.
Based on above-mentioned theory, the step heat supply system of power plant based on absorption heat pump 4 and steam jet ejector of the utility model
The operation logic of system is specific as follows:
(1) it heats just latter stage, heat supply temperature is low, heats heat supply network using absorption heat pump 4 and first order steam jet ejector 5 and follows
Ring water: the steam inlet of steam turbine 1 is connect by high temperature and high pressure steam pipeline with the steam (vapor) outlet of boiler of power plant 16, steam turbine 1
The steam exhaust of outlet is divided into two strands, one driving fluid as first order steam jet ejector 5, and another plume is to condenser 2；Condensing
The circulation water inlet of device 2 is connect with the well 10 of cooling tower 3, and the recirculated water of condenser 2 is divided into two strands, one flows into absorption type heat
In the evaporator pipeline of pump 4, as the low-temperature heat source of absorption heat pump 4, after the cooling of absorption heat pump 4, then it is back to cold
But the well 10 of tower 3, recycles.
The pumping of steam turbine 1 is divided into two strands, closes third valve 14 and the 4th valve 15, one is passed through absorption heat pump 4
High-low pressure generator pipeline in, the high temperature driven heat source as absorption heat pump 4；Another plume is sprayed to first order steam
Device 5 closes the second valve 13 as working fluid, opens the first valve 12, makes the fluid-mixing of first order steam jet ejector 5
It flows in the first heat-exchange device 6, the heat source as heating heat supply network return water.
Heat supply network return water first flows into the absorber of absorption heat pump 4, again from the condenser mouth of absorption heat pump 4 after being heated
Outflow, flows to the water inlet of the first heat-exchange device 6, after being heated, flows out from the water outlet of the first heat-exchange device 6, and lead to
It crosses heat supply pipeline and is connect with the entrance that heat supply network supplies water, directly feed to heat user；The steam drainage of absorption heat pump 4 and the first heat are handed over
The hydrophobic of changing device 6 all flows to drain tank 11.
(2) the heating time cold phase, heat supply temperature is relatively high, using absorption heat pump 4, first order steam jet ejector 5 and second
Grade 7 series system of steam jet ejector heats heat supply network recirculated water: the steam inlet of steam turbine 1 passes through high temperature and high pressure steam pipeline and electricity
The steam (vapor) outlet of factory's boiler 16 connects, and the steam exhaust that steam turbine 1 exports is divided into two strands, one is as first order steam jet ejector 5
Driving fluid, another plume is to condenser 2；The circulation water inlet of condenser 2 is connect with the well 10 of cooling tower 3, condenser 2
Recirculated water is divided into two strands, one is flowed into the evaporator pipeline of absorption heat pump 4, as the low-temperature heat source of absorption heat pump 4, warp
After crossing the cooling of absorption heat pump 4, then it is back to the well 10 of cooling tower 3, recycled.
The pumping of steam turbine 1 is divided into three strands, one is passed through in the pipeline of high-low pressure generator of absorption heat pump 4, as
The high temperature driven heat source of absorption heat pump 4；Another plume opens the second valve as working fluid to first order steam jet ejector 5
Door 13 closes the first valve 12, the fluid-mixing of first order steam jet ejector 5 is made to flow to the low pressure of second level steam jet ejector 7
Entrance, the driving fluid as second level steam jet ejector 7；Open third valve 14, close the 4th valve 15, third plume to
Second level steam jet ejector 7, as working fluid, the fluid-mixing of second level steam jet ejector 7 flows to the first heat-exchange device 6
Steam inlet, by two-stage steam jet ejector series connection after, the temperature for flowing to the fluid of the first heat-exchange device 6 further mentions
Height, the heat source as heating heat supply network return water.
Heat supply network return water first flows into the absorber of absorption heat pump 4, again from the condenser mouth of absorption heat pump 4 after being heated
Outflow, flows to the water inlet of the first heat-exchange device 6, after being heated, flows out from the water outlet of the first heat-exchange device 6, and lead to
It crosses heat supply pipeline and is connect with the entrance that heat supply network supplies water, directly feed to heat user；The steam drainage of absorption heat pump 4 and the first heat are handed over
The hydrophobic of changing device 6 all flows to drain tank 11.
(3) heat severe cold device, heating temperature demand highest, using absorption heat pump 4, first order steam jet ejector 5 and the
7 series system of second steam injector and the first heat-exchange device 6, the second heat-exchange device 8 heat heat supply network recirculated water: steamer
The steam inlet of machine 1 is connect by high temperature and high pressure steam pipeline with the steam (vapor) outlet of boiler of power plant 16, the steam exhaust that steam turbine 1 exports
It is divided into two strands, one driving fluid as first order steam jet ejector 5, another plume is to condenser 2；The circulation of condenser 2
Water inlet is connect with the well 10 of cooling tower 3, and the recirculated water of condenser 2 is divided into two strands, one flows into the evaporation of absorption heat pump 4
In device pipeline, as the low-temperature heat source of absorption heat pump 4, after the cooling of absorption heat pump 4, then it is back to the water of cooling tower 3
Well 10, recycles.
The pumping of steam turbine 1 is divided into four strands, one is passed through in the pipeline of high-low pressure generator of absorption heat pump 4, as
The high temperature driven heat source of absorption heat pump 4；Another plume opens the second valve as working fluid to first order steam jet ejector 5
Door 13 closes the first valve 12, the fluid-mixing of first order steam jet ejector 5 is made to flow to the low pressure of second level steam jet ejector 7
Entrance, the driving fluid as second level steam jet ejector 7；Third stock opens third valve 14, flows to the injection of second level steam
Device 7, as working fluid, the fluid-mixing of second level steam jet ejector 7 flows to the steam inlet of the first heat-exchange device 6, warp
After crossing the series connection of two-stage steam jet ejector, the temperature for flowing to the fluid of the first heat-exchange device 6 is further increased, as heating heat supply network
The heat source of return water；The 4th valve 15 is opened, the 4th plume is to the second heat-exchange device 8, as further heating heat supply network return water
Heat source.
Heat supply network return water first flows into the absorber of absorption heat pump 4, again from the condenser mouth of absorption heat pump 4 after being heated
Outflow, flows to the water inlet of the first heat-exchange device 6, after being heated, flows out from the water outlet of the first heat-exchange device 6, followed by
Afterflow enters the water inlet of the second heat-exchange device 8, after the further heating of the second heat-exchange device 8, feeds to heat user；It inhales
The steam drainage of receipts formula heat pump 4, the first heat-exchange device 6 and the hydrophobic of the second heat-exchange device 8 all flow to drain tank 11.
According to the operation logic of above system, valve rationally can be set on each pipeline, to reach according to different heat supplies
Demand and flexible modulation heat supply route and heat supply temperature realize the purpose of step heat supply.
Specifically, by taking certain power plant as an example, using the power plant based on absorption heat pump 4 and steam jet ejector of the utility model
Step heating system carries out heat supply, wherein the first heat-exchange device 6 is heat exchangers for district heating, and the second heat-exchange device 8 adds for spike
Hot device.
In Heating Period, heat supply network circulating water flow is 9300t/h, and heat supply network return water temperature is 55 DEG C, by absorption heat pump 4 the
Temperature is upgraded to 75 DEG C after primary heating, heat exchange；It carries out second by steam jet ejector to heat, temperature is upgraded to 95 DEG C after heat exchange
It (in just latter stage of heating, only puts into first order steam jet ejector 5 and is heated, temperature is upgraded to 86 DEG C after heat exchange, by heating network
It send to user；In the heat supply time cold phase, series connection puts into operation the first order and second level steam jet ejector 7 is heated, temperature liter after heat exchange
It is 95 DEG C, send by heating network to user), third time heating is carried out by peak load calorifier, temperature is upgraded to 115 after heat exchange
DEG C, it send by heating network to user.
In terms of heat supply network circulating water flow 9300t/h, in Heating Period heat supply network recirculated water, absorption heat pump 4, steam jet ejector,
Calculate the temperature and thermal balance relationship between double-bank heater.
In entire Heating Period, absorption heat pump 4 is run in declared working condition, and thermal balance relationship is as follows:
4 temperature (DEG C) of heat supply network recirculated water entry/exit absorption heat pump: 55/75；
The heat (MW) that heat supply network recirculated water absorbs in absorption heat pump 4: 216.3；Remaining hot water entry/exit absorption heat pump 4
Temperature (DEG C): 40/32；
The excess heat (MW) of recovery waste heat water: 92.85；
The pressure (MPa) of driving steam: 0.25；
The temperature (DEG C) of driving steam: 193.6；
The steam consumption (t/h) of driving steam: 174；
Heat pump COP value are as follows: 1.75；
1. heating first latter stage, heat supply network recirculated water:
The temperature (DEG C) of heat supply network recirculated water entry/exit heater: 75/85；
The heat (MW) that heat supply network recirculated water absorbs in the heater: 108.1；First order steam jet ejector 5:
The pressure (MPa) of high-pressure work steam: 0.5；
The temperature (DEG C) of high-pressure work steam: 229；
The quantity of steam (t/h) of high-pressure work steam: 66；
The pressure (MPa) of injection steam exhaust: 0.008；
The temperature (DEG C) of injection steam exhaust: 41；
The quantity of steam (t/h) of injection steam exhaust: 100
The pressure (MPa) of mixed vapour: 0.07；
The temperature (DEG C) of mixed vapour: 89；
2. the heating time cold phase, heat supply network recirculated water:
The temperature (DEG C) of heat supply network recirculated water entry/exit heater: 75/95；
The heat (MW) that heat supply network recirculated water absorbs in the heater: 217.2；Second level steam jet ejector 7:
The pressure (MPa) of high-pressure work steam: 0.5；
The temperature (DEG C) of high-pressure work steam: 229；
The quantity of steam (t/h) of high-pressure work steam: 164；
The pressure (MPa) of 5 mixed vapour of injection first order steam jet ejector: 0.07；
The temperature (DEG C) of 5 mixed vapour of injection first order steam jet ejector: 89；
The quantity of steam (t/h) of 5 mixed vapour of injection first order steam jet ejector: 166；
The pressure (MPa) of the mixed vapour of second level steam jet ejector 7: 0.1；
The temperature (DEG C) of 7 mixed vapour of second level steam jet ejector: 99；
3. heating freeze-up, heat supply network recirculated water:
The temperature (DEG C) of heat supply network recirculated water entry/exit peak load calorifier: 95/115；
The heat (MW) that heat supply network recirculated water absorbs in peak load calorifier: 218.4；
The pressure (MPa) of the high temperature and high pressure steam of peak load calorifier: 0.5；
The temperature (DEG C) of the high temperature and high pressure steam of peak load calorifier: 229；
The steam consumption (t/h) of the high temperature and high pressure steam of peak load calorifier: 310；
It, can be significantly by embodiments above it is found that the utility model recycles circulating water afterheat using absorption heat pump 4
Reduce cold end loss；Using steam jet ejector series connection heat supply, it is possible to reduce pumping, while heat supply network in heating process can be reduced and followed
The temperature gradient of ring water is poor, to reduceLoss.It, can flexible modulation absorption with the difference of heat supply temperature demand in Heating Period
Formula heat pump 4, first order steam jet ejector 5, second level steam jet ejector 7, the first heat-exchange device 6 and the second heat-exchange device 8
Operation order and mode, come rationally control heat supply temperature, improve the economy of unit and the utilization rate of non-renewable energy, reduction
The use cost of user.
Although having made to retouch in detail to the utility model with a general description of the specific embodiments in this specification
State, but on the basis of the utility model, it can be made some modifications or improvements, this be to those skilled in the art it is aobvious and
It is clear to.Therefore, it is practical new to belong to this for these modifications or improvements on the basis of without departing from the spirit of the present invention
The claimed range of type.
Claims (8)
1. a kind of power plant's step heating system based on absorption heat pump and steam jet ejector, which is characterized in that including steam turbine,
Condenser, cooling tower, absorption heat pump, first order steam jet ejector, second level steam jet ejector and the first heat-exchange device；
The steam exhaust outlet of the steam turbine is connect with the steam inlet of the condenser, the circulation water inlet of the condenser and institute
The well connection of cooling tower is stated, the circulating water outlet of the condenser is connect with the evaporator inlet of the absorption heat pump, institute
The evaporator outlet for stating absorption heat pump is connect with the well of the cooling tower；
The steam exhaust outlet of the steam turbine is also connect with the driving fluid entrance of the first order steam jet ejector；
The steam extraction outlet of the steam turbine is connect with the generator inlet of the absorption heat pump；
The Working-fluid intaking difference of the Working-fluid intaking of the first order steam jet ejector, the second level steam jet ejector
Steam extraction with the steam turbine, which exports, to be connected；
The fluid-mixing of the driving fluid entrance of the second level steam jet ejector and the first order steam jet ejector, which exports, to be connected
It connects；
The fluid-mixing outlet of the first order steam jet ejector, the fluid-mixing outlet of the second level steam jet ejector also divide
It is not connect with the steam inlet of first heat-exchange device；
The outlet of heat supply network return water is connect by water return pipeline with the absorber entrance of the absorption heat pump, the absorption heat pump
Condensator outlet connect with the water inlet of first heat-exchange device, the water outlet of first heat-exchange device passes through confession
Heat pipeline is connect with the entrance that heat supply network supplies water.
2. power plant's step heating system according to claim 1 based on absorption heat pump and steam jet ejector, feature
It is, further includes the second heat-exchange device, the steam inlet of second heat-exchange device and the steam extraction of the steam turbine exports
Connection, the water inlet of second heat-exchange device are connect with the water outlet of first heat-exchange device, and second heat is handed over
The water outlet of changing device is connect by heat supply pipeline with the entrance that heat supply network supplies water.
3. power plant's step heating system according to claim 2 based on absorption heat pump and steam jet ejector, feature
It is, first heat-exchange device is heat exchangers for district heating.
4. power plant's step heating system according to claim 2 based on absorption heat pump and steam jet ejector, feature
It is, second heat-exchange device is peak load calorifier.
5. power plant's step heating system according to claim 1 based on absorption heat pump and steam jet ejector, feature
It is, the generator exports of the absorption heat pump are connected to drain tank by pipeline.
6. power plant's step heating system according to claim 1 based on absorption heat pump and steam jet ejector, feature
It is, the steam (vapor) outlet of first heat-exchange device is connected to drain tank by pipeline.
7. power plant's step heating system according to claim 2 based on absorption heat pump and steam jet ejector, feature
It is, the steam (vapor) outlet of second heat-exchange device is connected to drain tank by pipeline.
8. power plant's step heating system according to claim 1 based on absorption heat pump and steam jet ejector, feature
It is, is connected with circulating pump between circulation water inlet and the well of the cooling tower of the condenser.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286728A (en) * | 2018-03-28 | 2018-07-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of power plant's step heating system |
| CN113375209A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Large temperature difference heat supply method and system for coal-fired unit coupling compression heat pump |
| CN113375210A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Cold end waste heat supply method and system of coupling absorption heat pump |
| CN113819678A (en) * | 2021-10-22 | 2021-12-21 | 安徽普泛能源技术有限公司 | Multi-heat-source generator unit with ejector and absorption type refrigerating system thereof |
-
2018
- 2018-03-28 CN CN201820427972.2U patent/CN208253695U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286728A (en) * | 2018-03-28 | 2018-07-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of power plant's step heating system |
| CN113375209A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Large temperature difference heat supply method and system for coal-fired unit coupling compression heat pump |
| CN113375210A (en) * | 2021-06-28 | 2021-09-10 | 大唐环境产业集团股份有限公司 | Cold end waste heat supply method and system of coupling absorption heat pump |
| CN113819678A (en) * | 2021-10-22 | 2021-12-21 | 安徽普泛能源技术有限公司 | Multi-heat-source generator unit with ejector and absorption type refrigerating system thereof |
| CN113819678B (en) * | 2021-10-22 | 2022-11-22 | 安徽普泛能源技术有限公司 | Multi-heat-source generator unit with ejector and absorption type refrigerating system thereof |
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