CN207686774U - A kind of power plant's coupling absorption type heat pump heat distribution system - Google Patents
A kind of power plant's coupling absorption type heat pump heat distribution system Download PDFInfo
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- CN207686774U CN207686774U CN201721502037.XU CN201721502037U CN207686774U CN 207686774 U CN207686774 U CN 207686774U CN 201721502037 U CN201721502037 U CN 201721502037U CN 207686774 U CN207686774 U CN 207686774U
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 68
- 230000008878 coupling Effects 0.000 title description 9
- 238000010168 coupling process Methods 0.000 title description 9
- 238000005859 coupling reaction Methods 0.000 title description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000000605 extraction Methods 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 239000000498 cooling water Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 6
- 239000002918 waste heat Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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Abstract
The utility model is related to a kind of power plant to couple absorption type heat pump heat distribution system comprising：Steam turbine, including sequentially connected high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder；Absorption heat pump, water at low temperature water inlet pipe and water at low temperature outlet pipe are communicated in circulating cooling water loop；The extraction opening of intermediate pressure cylinder is connected with the air intake of the air intake of heat exchangers for district heating and absorption heat pump simultaneously；The high-temperature water outlet pipe of absorption heat pump is connected with the water inlet pipe of the water inlet pipe of short distance heat user and heat exchangers for district heating simultaneously, and high-temperature inlet water pipe is connected with the outlet pipe of the primary net outlet pipe of thermal substation and short distance heat user simultaneously.The power plant couples absorption type heat pump heat distribution system, in the case where not increasing installed capacity, increases generated energy, improves the energy utilization rate of power plant, and it is big to solve the problems, such as that steam extraction heating hot net water damages.
Description
Technical field
The utility model relates to steam power plant's heat supply process field, and in particular to a kind of power plant's coupling absorption heat pump heat supply system
System.
Background technology
Recently as being continuously increased for urban architecture, causes extraneous thermal load demands to increase year by year, need central heating
Net heats for more buildings.However one side boiler dilatation needs power plant to have enlarging place enough, it can be existing by this area
The limitation of reality condition, on the other hand harsh discharge standard, limits the newly-built and enlarging of heat source to a certain extent.It is energy saving to subtract
Row is the theme advocated of country, and cogeneration of heat and power is energy-saving effective way.As domestic heat demand increasingly increases, supply
Thermal technology is also in diversification, and the steam discharge of conventional steam extraction heat supply unit contains a large amount of waste heat.Since this partial heat temperature is relatively low
It is directly discharged in environment, can not directly be used in actual production process, to cause the waste of a large amount of waste heats.
Large-scale take out in China coagulates thermoelectricity unit at present, and heat supply extraction temperature is existing mostly in 200~300 DEG C of temperature ranges
Temperature levels of the design supply and return water temperature of heat supply network at 130 DEG C/70 DEG C, heat supply extraction temperature and heat supply network return water temperature presence are very big
The temperature difference, directly using heat supply steam extraction heating heat supply network return water will produce prodigious damage, be unfavorable for energy-saving.
Heat-supplying mode in the prior art mainly has extraction for heat supply and high back pressure heat supply, wherein extraction for heat supply mode application
The most extensively, refer to the steam for doing work(from steam turbine extraction section, the heat supply side of heat supply network return water is heated into heat exchangers for district heating
Formula, there are the prodigious temperature difference for this heat-supplying mode heat supply extraction temperature and heat supply network return water temperature, directly heat supply steam extraction are utilized to heat
Heat supply network return water will produce prodigious damage；And high back pressure heat supply refer to air-cooled high back pressure thermal power plant unit use water at low temperature direct-furnish pattern
Heat supply, although loss caused by being avoided that extraction for heat supply pattern, heat supply network supply water temperature is between 60 DEG C~70 DEG C, temperature
Relatively low, heat supply is unsuitable for remote heat supply apart from limited.
Utility model content
The purpose of this utility model is to provide a kind of power plant's coupling absorption type heat pump heat distribution system, is not increasing installed capacity
In the case of, increase generated energy, improve the energy utilization rate of power plant, it is big to solve the problems, such as that steam extraction heating hot net water damages.
In order to solve the above technical problems, power plant's coupling absorption type heat pump heat distribution system provided by the utility model includes：
Steam turbine, including sequentially connected high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder；Absorption heat pump, water at low temperature water inlet pipe and water at low temperature
Outlet pipe is communicated in circulating cooling water loop；The outlet pipe of heat exchangers for district heating is connected with the primary net water inlet pipe of thermal substation, institute
The secondary network outlet pipe for stating thermal substation is connected with the water inlet pipe of remote heat user, the secondary network water inlet pipe of the thermal substation and institute
The outlet pipe for stating remote heat user is connected；The extraction opening of medium pressure cylinder while the air intake with the heat exchangers for district heating and institute
The air intake for stating absorption heat pump is connected, and it is equipped with the second extraction control valve between the air intake of the absorption heat pump,
It is additionally provided with third extraction control valve, the condensation water out of the absorption heat pump between the air intake of the heat exchangers for district heating
It is connected to therrmodynamic system with the condensation water out of the heat exchangers for district heating；The high-temperature water outlet pipe of the absorption heat pump simultaneously with
The water inlet pipe of the short distance heat user is connected with the water inlet pipe of heat exchangers for district heating, high-temperature inlet water pipe simultaneously with the thermal substation
Primary net outlet pipe be connected with the outlet pipe of the short distance heat user.
In power plant's coupling absorption type heat pump heat distribution system provided by the utility model, absorption heat pump is using steam turbine
Intermediate pressure cylinder steam extraction is as driving heat source, using circulating cooling water of power plant as heat pump low-temperature heat source, by low grade residual heat (Waste
Heat) it is subject to upgrading utilization.Meanwhile water at low temperature direct-furnish pattern, no steam extraction is used to heat link, avoid for short distance heat user heat supply
Steam extraction directly heats hot net water and causes larger loss；And it is that remote heat user heat supply is heated using first and second net step
Pattern promotes heating parameter by heat exchangers for district heating using intermediate pressure cylinder steam extraction to once netting heating of supplying water.
Specifically, absorption heat pump is under driving of the intermediate pressure cylinder steam extraction as driving heat source of steam turbine, and extraction follows
The waste heat of cooling water in ring chilled(cooling) water return (CWR) heats hot net water, and the hot net water part after heating is used for short distance heat user
Heat supply is carried out, and another part is reached into certain temperature by heat exchangers for district heating heating, into thermal substation to remote heat user
Heat supply is carried out, the hot net water after short distance heat user and thermal substation heat exchange flows back in absorption heat pump, constitutes one and follow again
Ring.And secondary network water flows back to thermal substation again after after thermal substation is heated being remote heat user heat supply, constitutes another solely
Vertical cycle.
In heat supply period, can according to the difference of outdoor temperature, adjust the second extraction control valve to control the temperature of hot net water,
And then the heat supply situation that control is short distance heat user, meanwhile, it can be by adjusting third extraction control valve, to control heat supply network heating
Device to the heating state of primary net water, and then control be remote heat user heat supply situation, it is simple in structure, convenient for control.
Steam turbine is connect with generator to produce electricl energy, but in the generation of electrical energy during, inevitably can be due to various reasons
Generate a certain amount of loss, the i.e. non-a hundred percent of conversion ratio.Therefore, power plant provided by the utility model couples absorption heat pump
In heating system, absorption heat pump is directly to use the intermediate pressure cylinder steam extraction of steam turbine as driving heat source, compared to electronic heat
For pump, under identical drive condition, the loss of energy in the conversion process is saved, and then effectively improve using energy source
Rate.
Using recirculated cooling water as low-temperature heat source, extracts heat using absorption heat pump and to user's heat supply, on the one hand return
Circulating water afterheat has been received, the heating load of heating system is improved, has solved the imbalance between supply and demand of heating system；On the other hand, into heat supply network
The heat supply network coolant-temperature gage of heater increases, and the irreversible loss in heat exchangers for district heating is reduced, and steam extraction thermal energy is efficiently used；Together
When, steam turbine heat supply steam extraction amount is also reduced, generated energy can be increased in the case where not increasing installed capacity, improve power plant
Energy utilization rate.
Optionally, the circulating cooling water loop include sequentially connected condenser, hot water valve, booster, cooling tower and
The low temperature water inlet pipe of water circulating pump, the absorption heat pump is connect with the outlet pipe of the booster, the absorption heat pump
Low temperature outlet pipe is connected with the water inlet pipe of the cooling tower.
Optionally, the intermediate pressure cylinder extraction opening of the steam turbine and second extraction control valve, third extraction control valve it
Between be additionally provided with the first extraction control valve.
Optionally, the absorption heat pump is lithium bromide absorption type heat pump.
Optionally, the first drain valve is equipped between the condensation water out and the therrmodynamic system of the absorption heat pump；Institute
It states and is equipped with the second drain valve between the condensation water out of heat exchangers for district heating and the therrmodynamic system.
Description of the drawings
Fig. 1 is the structural schematic diagram of power plant's coupling absorption type heat pump heat distribution system provided by the utility model.
In attached drawing 1, the reference numerals are as follows：
1- high pressure cylinders；2- intermediate pressure cylinders；3- low pressure (LP) cylinders；4- generators；The first extraction control valves of 5-；The second extraction regulations of 6-
Valve；7- third extraction control valves；8- absorption heat pumps；The first drain valves of 9-；10- short distance heat users；11- heat exchangers for district heatings；
12- thermal substations；The remote heat users of 13-；The second drain valves of 14-；15- condensers；16- hot water valves；17- boosters；18- is cooled down
Tower；19- water circulating pumps.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution of the utility model, below in conjunction with the accompanying drawings and have
The utility model is described in further detail for body embodiment.
Referring to FIG. 1, Fig. 1 is the structural representation of power plant's coupling absorption type heat pump heat distribution system provided by the utility model
Figure.
As shown in Figure 1, the utility model embodiment provides a kind of power plant's coupling 8 heating system of absorption heat pump, packet
It includes：Steam turbine, including sequentially connected high pressure cylinder 1, intermediate pressure cylinder 2 and low pressure (LP) cylinder 3；Absorption heat pump 8, water at low temperature water inlet pipe and
Water at low temperature outlet pipe is communicated in circulating cooling water loop；The outlet pipe of heat exchangers for district heating 11 is intake with the primary net of thermal substation 12
Pipe is connected, and the secondary network outlet pipe of thermal substation 12 is connected with the water inlet pipe of remote heat user 13, the secondary network of thermal substation 12 into
Water pipe is connected with the outlet pipe of remote heat user 13；The extraction opening of intermediate pressure cylinder 2 simultaneously with the air intake of heat exchangers for district heating 11 and
The air intake of absorption heat pump 8 is connected, and it is equipped with the second extraction control valve 6 between the air intake of absorption heat pump 8, with
Third extraction control valve 7 is additionally provided between the air intake of heat exchangers for district heating 11, the condensation water out and heat supply network of absorption heat pump 8 add
The condensation water out of hot device 11 is connected to therrmodynamic system；The high-temperature water outlet pipe of absorption heat pump 8 simultaneously with short distance heat user
10 water inlet pipe is connected with the water inlet pipe of heat exchangers for district heating 11, and high-temperature inlet water pipe is discharged with the primary net of thermal substation 12 simultaneously
Pipe is connected with the outlet pipe of short distance heat user 10.
Wherein, absorption heat pump 8 is cooled down using 2 steam extraction of intermediate pressure cylinder of steam turbine as driving heat source using power plant cycle
Water is subject to upgrading as heat pump low-temperature heat source, by low grade residual heat (technique waste heat) and utilizes.Meanwhile it being supplied for short distance heat user 10
Thermal recovery water at low temperature direct-furnish pattern, no steam extraction heat link, avoid steam extraction from directly heating hot net water and cause larger loss；And
First and second net step heating mode is used for 13 heat supply of remote heat user, passes through heat exchangers for district heating using 2 steam extraction of intermediate pressure cylinder
11 pairs of primary nets supply water and heat, and promote heating parameter.
Specifically, absorption heat pump 8 is the extraction under driving of 2 steam extraction of intermediate pressure cylinder as driving heat source of steam turbine
The waste heat of cooling water in circulating cooling water loop heats hot net water, and the hot net water part after heating is used to use closely heat
Family 10 carries out heat supply, and another part is reached certain temperature by the heating of heat exchangers for district heating 11, into thermal substation 12 to long distance
Heat supply is carried out from heat user 13, the hot net water after short distance heat user 10 and thermal substation 12 exchange heat flows back to absorption heat pump again
In 8, a cycle is constituted.And secondary network water flows back to again after after thermal substation 12 is heated being 13 heat supply of remote heat user
Thermal substation 12 constitutes another independent cycle.
In heat supply period, the second extraction control valve 6 can be adjusted to control the temperature of hot net water according to the difference of outdoor temperature
Degree, and then the heat supply situation for short distance heat user 10 is controlled, meanwhile, it can be by adjusting third extraction control valve 7, to control heat
Net heater 11 to the heating state of primary net water, and then control be remote heat user 13 heat supply situation, it is simple in structure, just
In control.
Steam turbine is connect with generator 4 to produce electricl energy, but in the generation of electrical energy during, inevitably can be due to various reasons
Generate a certain amount of loss, the i.e. non-a hundred percent of conversion ratio.Therefore, the power plant that the present embodiment is provided couples absorption heat pump 8
In heating system, absorption heat pump 8 is directly to use 2 steam extraction of intermediate pressure cylinder of steam turbine as driving heat source, compared to electronic
For heat pump, under identical drive condition, the loss of energy in the conversion process is saved, and then effectively improve using energy source
Rate.
Using recirculated cooling water as low-temperature heat source, extracts heat using absorption heat pump 8 and to user's heat supply, on the one hand return
Circulating water afterheat has been received, the heating load of heating system is improved, has solved the imbalance between supply and demand of heating system；On the other hand, into heat supply network
The heat supply network coolant-temperature gage of heater 11 increases, and the irreversible loss in heat exchangers for district heating 11 is reduced, and steam extraction thermal energy has obtained effective profit
With；Meanwhile steam turbine heat supply steam extraction amount is also reduced, generated energy can be increased in the case where not increasing installed capacity, improved
The energy utilization rate of power plant.
In the above-described embodiments, circulating cooling water loop includes sequentially connected condenser 15, hot water valve 16, booster
17, the low temperature water inlet pipe of cooling tower 18 and water circulating pump 19, absorption heat pump 8 is connect with the outlet pipe of booster 17, absorption
The low temperature outlet pipe of heat pump 8 is connected with the water inlet pipe of cooling tower 18.Certainly, in the present embodiment, simultaneously to circulating cooling water loop
It is not specifically limited, absorption heat pump 8 can also be communicated in auxiliary machine circulating cooling water pipeline, wherein subsidiary engine circulating cooling
The outlet pipe of water is connect with the water inlet pipe of cooling tower 18, and the return pipe of auxiliary machine circulating cooling water connects with the outlet pipe of cooling tower 18
It connects.
But it sets circulating cooling water loop to include sequentially connected condenser 15, hot water valve 16, booster 17, cooling
The scheme of tower 18 and water circulating pump 19 is come relative to the scheme being communicated in absorption heat pump 8 in auxiliary machine circulating cooling water circuit
It says, cooling water water is larger, and contained waste heat is more, and absorption heat pump 8 can be extracted more by the circulating cooling water loop
Heat.
In the above-described embodiments, 2 extraction opening of intermediate pressure cylinder and the second extraction control valve 6, third extraction control valve 7 of steam turbine
Between be additionally provided with the first extraction control valve 5, wherein the first extraction control valve 5 leads to for controlling the total steam extraction amount of intermediate pressure cylinder 2
It crosses the second extraction control valve 6 and third extraction control valve 7 adjusts the quantity of steam entered in absorption heat pump 8 and enters heat supply network and heats
Quantity of steam in device, to balance the heat supply situation of short distance heat user 10 and remote heat user 13.Meanwhile it happening suddenly
Steam extraction can be closed when event by closing the first extraction control valve 5.
In the above-described embodiments, absorption heat pump 8 is selected as lithium bromide absorption type heat pump 8, certainly in the present embodiment,
Ammonia water absorbing heat pump 8 can be selected, is not limited specifically.
In the above-described embodiments, the first drain valve 9 is equipped between the condensation water out and therrmodynamic system of absorption heat pump 8；
The second drain valve 14 is equipped between the condensation water out and therrmodynamic system of heat exchangers for district heating 11, the first drain valve 9 and second is hydrophobic
The setting of valve 14 is discharged as early as possible convenient for condensed water, while being automatically prevented from the leakage of steam to the maximum extent.
The power plant couples 8 heating system of absorption heat pump, after heat supply period, closes the first extraction control valve 5, second
Extraction control valve 6, third extraction control valve 7, hot water valve 16, booster 17, absorption heat pump 8, the first drain valve 9 and second
Unit is switched to pure condensate operation by drain valve 14.
Above are merely preferred embodiments of the utility model, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (5)
1. a kind of power plant couples absorption type heat pump heat distribution system, which is characterized in that including：
Steam turbine, including sequentially connected high pressure cylinder (1), intermediate pressure cylinder (2) and low pressure (LP) cylinder (3)；
Absorption heat pump (8), water at low temperature water inlet pipe and water at low temperature outlet pipe are communicated in circulating cooling water loop；
The outlet pipe of heat exchangers for district heating (11) is connected with the primary net water inlet pipe of thermal substation (12), the thermal substation (12) it is secondary
Net outlet pipe is connected with the water inlet pipe of remote heat user (13), secondary network water inlet pipe and the long distance of the thermal substation (12)
Outlet pipe from heat user (13) is connected；
The extraction opening of medium pressure cylinder (2) while air intake and the absorption heat pump (8) with the heat exchangers for district heating (11)
Air intake be connected, and its between the air intake of the absorption heat pump (8) be equipped with the second extraction control valve (6), with institute
It states and is additionally provided with third extraction control valve (7), the condensed water of the absorption heat pump (8) between the air intake of heat exchangers for district heating (11)
The condensation water out of outlet and the heat exchangers for district heating (11) is connected to therrmodynamic system；
The high-temperature water outlet pipe of the absorption heat pump (8) while water inlet pipe and heat exchangers for district heating with short distance heat user (10)
(11) water inlet pipe is connected, and high-temperature inlet water pipe is warm with the primary net outlet pipe of the thermal substation (12) and the short distance simultaneously
The outlet pipe of user (10) is connected.
2. power plant according to claim 1 couples absorption type heat pump heat distribution system, which is characterized in that the recirculated cooling water
Circuit includes sequentially connected condenser (15), hot water valve (16), booster (17), cooling tower (18) and water circulating pump (19),
The low temperature water inlet pipe of the absorption heat pump (8) is connect with the outlet pipe of the booster (17), the absorption heat pump (8)
Low temperature outlet pipe is connected with the water inlet pipe of the cooling tower (18).
3. power plant according to claim 1 or 2 couples absorption type heat pump heat distribution system, which is characterized in that the steam turbine
Intermediate pressure cylinder extraction opening and second extraction control valve (6), third extraction control valve be additionally provided with the first extraction regulation between (7)
Valve (5).
4. power plant according to claim 1 or 2 couples absorption type heat pump heat distribution system, which is characterized in that described absorption
Heat pump (8) is lithium bromide absorption type heat pump (8).
5. power plant according to claim 1 or 2 couples absorption type heat pump heat distribution system, which is characterized in that described absorption
The first drain valve (9) is equipped between the condensation water out and the therrmodynamic system of heat pump (8)；The heat exchangers for district heating (11) is coagulated
It bears water and is equipped with the second drain valve (14) between outlet and the therrmodynamic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502037.XU CN207686774U (en) | 2017-11-10 | 2017-11-10 | A kind of power plant's coupling absorption type heat pump heat distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721502037.XU CN207686774U (en) | 2017-11-10 | 2017-11-10 | A kind of power plant's coupling absorption type heat pump heat distribution system |
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| Publication Number | Publication Date |
|---|---|
| CN207686774U true CN207686774U (en) | 2018-08-03 |
Family
ID=62989340
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721502037.XU Expired - Fee Related CN207686774U (en) | 2017-11-10 | 2017-11-10 | A kind of power plant's coupling absorption type heat pump heat distribution system |
Country Status (1)
| Country | Link |
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| CN (1) | CN207686774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454248A (en) * | 2019-07-23 | 2019-11-15 | 上海发电设备成套设计研究院有限责任公司 | A kind of heating steam pressurizing transmission system |
-
2017
- 2017-11-10 CN CN201721502037.XU patent/CN207686774U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454248A (en) * | 2019-07-23 | 2019-11-15 | 上海发电设备成套设计研究院有限责任公司 | A kind of heating steam pressurizing transmission system |
| CN110454248B (en) * | 2019-07-23 | 2021-12-10 | 上海发电设备成套设计研究院有限责任公司 | Heat supply steam pressure boost conveying system |
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Granted publication date: 20180803 |