CN205560932U - Cold junction waste heat cascade utilization heating system - Google Patents
Cold junction waste heat cascade utilization heating system Download PDFInfo
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- CN205560932U CN205560932U CN201620052417.7U CN201620052417U CN205560932U CN 205560932 U CN205560932 U CN 205560932U CN 201620052417 U CN201620052417 U CN 201620052417U CN 205560932 U CN205560932 U CN 205560932U
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Abstract
The utility model provides a cold junction waste heat cascade utilization heating system, includes steam turbine, condenser, heat pump unit, temperature regulation unit, draws forth the drive steam pipework from the steam turbine and is connected to the heat pump unit, and closed circulation system is constituteed with the condenser in heat pump unit connection to circulating cooling water pipe way, and the recirculated cooling water who follows the heat pump outflow gets into the condenser and carries out the single heat, the temperature regulation unit carries out the temperature regulation compensation to heat supply network water and the recirculated cooling water who gets into the heat pump, makes heat pump set retrieve power plant's cold junction waste heat ability maximize, has extended the heat pump in the application of some in cold areas power plant in the north.
Description
Technical field
The utility model belongs to power plant for energy conservation field, is specifically related to a kind of cold end bootstrap system
Background technology
Coal is that (proportion accounting for primary energy consumption 2014 is 64.2% to the main primary energy of China, within 2015, estimates
It is 63.3%), it is concentrated mainly on thermoelectricity, metallurgy and building material industry.Fired power generating unit is main force's generating set of China, its installation
Capacity accounts for about the 73% of total installed capacity of electricity capacity, and generated energy accounts for the ratio of gross generation more than 80%.Thus reduction thermal motor
The coal consumption of group, improves power plant efficiency, and the energy-saving and emission-reduction to China are significant.
Heat pump is that one utilizes high-grade heat energy as drive energy, reclaims low grade heat energy and is used for heat supply or the equipment of intensification,
It is widely used in the fields such as power plant, oil, chemical industry and metallurgy.It is inevitably present during the heat to power output of power plant
Intrinsic cold source energy, modern power plants thermal efficiency of cycle is 40%～57%.Heat pump is used to reclaim the recirculated water/weary of steam power plant
Vapour cold end low temperature exhaust heat, can improve the heat-economy of power plant, have significant energy-saving effect.
Suitably low-temperature heat source is one of key factor determining heat pump application.The feature of northern area heat supply in winter is: different
The outdoor temperature of heating period changes greatly and day and night temperature is relatively big, needs frequently to adjust the supply and return water temperature of a heat supply network,
The circulating cooling water temperature of power plant self also changes greatly simultaneously, makes the actual recovered waste heat amount of heat pump, heating leaving water temperature be subject to
Considerable influence.Particularly having arrived freeze-up, heat supply network return water temperature is in extremely high value, and circulating cooling coolant-temperature gage is in extremely low value,
All strong influence heating performances of heat pump.Heat pump in use needs that COP performance curve carries out test and revises.
Power plant only relies on change condenser circulating cooling water flow and indirectly regulates circulating cooling coolant-temperature gage at present, is limited by unit
Efficiency and equipment performance requirement, the effect of this regulative mode is the most limited, and primarily to adjusts unit output rather than be
Guarantee heat pump subsidiary engine heating performance.Additionally, northerly some areas, owing to circulating cooling coolant-temperature gage in winter is too low, heat
Pump cannot work at all, largely have impact on it and uses popularization.
Utility model content
The purpose of this utility model is to provide a kind of Appropriate application power plant cold end (recirculated water/exhaust steam) waste heat, improves energy profit
By efficiency, it is achieved the cold end bootstrap system of power plant for energy conservation consumption reduction.
To achieve these goals, the technical solution of the utility model is: the exhaust heat stepped heating system that utilizes of a kind of cold end, bag
Including steam turbine, condenser, heat pump unit, thermostat unit, gas turbine exhaust gas enters condenser, in condenser with follow
Ring cooling water carries out heat exchange；It is characterized in that, draw from steam turbine and drive steam pipework to be connected to heat pump unit, heat pump list
Unit is connected to recirculated cooling water pipeline, forms closed circulation system with condenser, and the recirculated cooling water flowed out from heat pump enters solidifying
Vapour device once heats；Heat pump unit is also connected with heat supply heat supply network.
Further, heat pump unit has circulating cooling water inlet and circulating cooling water out, is connected to coagulate by pipeline respectively
The circulating cooling water pipe in vapour device downstream and the circulating cooling water pipe of condenser upstream side, form closed circulation system with condenser.
Further, including the first thermostat unit, the first thermostat unit is connected to heat pump unit with bypass mode
Heat supply network water pipe, can carry out temperature regulation to the hot net water flowed into；
Further, including the second thermostat unit, the second thermostat unit is connected to heat pump unit with bypass mode
Circulating cooling water pipe, can carry out temperature regulation to the recirculated cooling water flowed into.
Further, the first thermostat unit, the second thermostat unit may be configured as an integral unit, for flow into
Heat exchange is carried out one time between hot net water and recirculated cooling water.
Further, the first thermostat unit, the second thermostat unit are set to an integral unit, use water-water to change
Hot device, carries out heat exchange between a heat supply network backwater and the recirculated cooling water flowed into.
Further, the first thermostat unit passes through heat supply network backwater water inlet pipe and heat supply network backwater exit branch with bypass mode
It is connected to a heat supply network return pipe of heat pump unit；Second thermostat unit is cold by recirculated cooling water water inlet pipe and circulation
But water exit branch is connected to the recirculated cooling water inlet tube of heat pump unit with bypass mode.
Further, on the recirculated cooling water inlet tube between recirculated cooling water water inlet pipe and recirculated cooling water exit branch
Circulating cooling water regulating valve is installed；Heat supply network backwater water inlet pipe is provided with heat supply network water regulating valve, enters at recirculated cooling water
Circulating cooling water regulating valve is installed on water arm.
The utility model is according to the principle of energy cascade utilization, it is possible to effectively regulate and avoid heat supply network backwater, recirculated cooling water
Temperature fluctuation off-design value, ensures the steady safe operation of heat pump, makes source pump reclaim power plant's cold end waste heat ability and maximizes.
Eliminate the microthermal climate restriction to heat pump application to a certain extent simultaneously, expand heat pump at north part cold district electricity
The application of factory.
Accompanying drawing explanation
Fig. 1 is heating system structure schematic diagram；
Wherein 1 steam turbine, 2 cooling towers, 3 condensers, 4 heat pumps, 5 heat supply network backwater, 6 one times heat supply network supplies water, and 7
Driving steam, 8 condense water, 9 heat pump import recirculated cooling waters, and 10 heat pump outlet recirculated cooling waters, 11 recirculated cooling waters follow
Ring water pump, 12 water-water heat exchangers, 13 circulating cooling water regulating valves, 14 circulating cooling water regulating valves, 15 hot net water regulations
Valve
Detailed description of the invention
1 pair of the utility model is further described below in conjunction with the accompanying drawings, it will be appreciated that content described herein is only used for
Bright and explain the utility model, be not used to limit the utility model.
Heating system in the utility model includes steam turbine 1, cooling tower 2, condenser 3, and gas turbine exhaust gas enters condenser,
In condenser, recirculated cooling water carries out heat exchange, and the recirculated cooling water entrance cooling tower after heat absorption heats up cools,
And circulate inflow condenser.Heating system still further comprises heat pump unit, and heat pump unit can use steam-powered absorption
Heat pump is it can also be used to steam-powered compression heat pump etc..Drawing from steam turbine 1 drives steam pipework to be connected to heat pump unit.
Heat pump unit has circulating cooling water inlet and circulating cooling water out, is connected to following of condenser downstream by pipeline respectively
Ring cooling water pipe and the circulating cooling water pipe of condenser upstream side, form closed circulation system with condenser, flows out from heat pump
Recirculated cooling water enters condenser and once heats.Heat pump unit also has a heat supply network backwater import and a heat supply network supplies water
Outlet, connects heat supply network return pipe and heat supply network feed pipe respectively.
Heating system still further comprises the first thermostat unit, the second thermostat unit, and the first thermostat unit leads to
Cross heat supply network backwater water inlet pipe and heat supply network backwater exit branch and be connected to a heat supply network return pipe of heat pump unit with bypass mode,
The heat supply network backwater flowed into can be carried out temperature regulation；Second thermostat unit is by recirculated cooling water water inlet pipe and follows
Ring cooling water exit branch is connected to the recirculated cooling water inlet tube of heat pump unit with bypass mode, can be to the circulating cooling flowed into
Water carries out temperature regulation.
First thermostat unit, the second thermostat unit may be configured as an integral unit, and water-water can be used further to change
Hot device, carries out heat exchange between a heat supply network backwater and the recirculated cooling water flowed into.
On recirculated cooling water inlet tube between recirculated cooling water water inlet pipe and recirculated cooling water exit branch, circulation is installed
Cooling sea water regulating valve；Heat supply network backwater water inlet pipe is provided with heat supply network water regulating valve, recirculated cooling water water inlet pipe is pacified
Equipped with circulating cooling water regulating valve.By the aperture Reasonable adjustment of three regulation valves, change working regulation can be realized
The recirculated cooling water flowed out from heat pump passes through water-water heat exchanger, utilizes heat supply network backwater to carry out secondary cascade heating.Regulation
Enter the hot net water of heat pump, circulating cooling coolant-temperature gage
When heating system is run,
The driving steam 7 extracting certain pressure from steam turbine 1 enters heat pump 4, is condensed into condensation water 8 after heat release.
Working method one, when outdoor circulating cooling coolant-temperature gage of cold phase first, last tentatively declines:
Circulating cooling water regulating valve 13 is opened, and circulating cooling water regulating valve 14 and heat supply network water regulating valve 15 are closed.
A recirculated cooling water extraction part for condenser 3 outlet enters heat pump 4 by circulating cooling water regulating valve 13, and remaining is straight
Tap into and carry out heat exchange cooling into cooling tower 2.
Heat pump outlet recirculated cooling water 10 enters condenser 3 through recirculated cooling water water circulating pump 11, discharges with steam turbine 1
Exhaust steam carry out heat exchange.Now for the once heating of heat pump outlet recirculated cooling water 10, water temperature improves about 6～11 DEG C.
Heat pump outlet recirculated cooling water 10, after once heating, enters heat pump 4 heat release.
Working method two, when freeze-up outdoor circulating cooling coolant-temperature gage is decreased obviously:
Circulating cooling water regulating valve 13 cuts out, and circulating cooling water regulating valve 14 and heat supply network water regulating valve 15 are opened.
The winter severe cold phase, heat supply network water supply 5 water temperature after overregulating ordinarily be about 55～60 DEG C.From a heat supply network backwater 5
In female pipe, an extraction part is by heat supply network water regulating valve 15, enters water-water heat exchanger 12 and carries out heat release cooling, returns mother
After heat supply network backwater 5 mixing of Guan Yuyuan, enter heat pump 4 and be heated up.
Heat pump outlet recirculated cooling water 10 enters after condenser 3 once heats through recirculated cooling water water circulating pump 11,
A part is directly entered cooling tower 2 desuperheat, and the remaining water-water heat exchanger 12 that enters is by a heat supply network water supply 5.Heating carries out two
Secondary step heat temperature raising, enters back into heat pump 4.Heat supply network water supply 5 and circulating cooling water temperature difference are about about 25～40 DEG C.
In the actual application of heat pump, along with the decline of outdoor temperature, its performance with heat supply network return water temperature rising, follow
The decline of ring cooling water temperature and reduce.The utility model is according to the principle of energy cascade utilization, it is possible to effectively regulates and avoids
Heat supply network backwater, the temperature fluctuation off-design value of recirculated cooling water, ensure the steady safe operation of heat pump, make source pump reclaim
Power plant's cold end waste heat ability maximizes.Eliminate the microthermal climate restriction to heat pump application to a certain extent simultaneously, expand
Heat pump is in the application of north part cold district power plant.
This heating system is not limited to use the steam power plant of steam turbine it can also be used to the cold end waste heat of Combined cycle gas-steam turbine unit
Utilize system；
It is not limited to reclaim the heat pump of circulating cooling water afterheat it can also be used to the heat of the cold end low-temperature heat source waste heat recovery such as exhaust steam
Pumping system.
Finally it is noted that the foregoing is only explanation of the present utility model, it is not limited to the utility model, although
Being described in detail the utility model, for a person skilled in the art, it still can be to aforementioned described
Technical scheme modify, or wherein portion of techniques feature is carried out equivalent.All in spirit of the present utility model and
Within principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (8)
1. cold end is exhaust heat stepped utilizes a heating system, and including steam turbine, condenser, heat pump unit, thermostat unit, gas turbine exhaust gas enters condenser, carries out heat exchange with recirculated cooling water in condenser；It is characterized in that, drawing from steam turbine and drive steam pipework to be connected to heat pump unit, heat pump unit is connected to recirculated cooling water pipeline, forms closed circulation system with condenser, and the recirculated cooling water entrance condenser flowed out from heat pump once heats；Heat pump unit is also connected with heat supply heat supply network.
Heating system the most according to claim 1, it is characterized in that, heat pump unit has circulating cooling water inlet and circulating cooling water out, it is connected to circulating cooling water pipe and the circulating cooling water pipe of condenser upstream side in condenser downstream respectively by pipeline, forms closed circulation system with condenser.
Heating system the most according to claim 1, it is characterised in that include the first thermostat unit, the first thermostat unit is connected to a heat supply network water pipe of heat pump unit with bypass mode, the hot net water flowed into can be carried out temperature regulation.
Heating system the most according to claim 3, it is characterised in that include that the second thermostat unit, the second thermostat unit are connected to the circulating cooling water pipe of heat pump unit with bypass mode, can carry out temperature regulation to the recirculated cooling water flowed into.
Heating system the most according to claim 4, it is characterised in that the first thermostat unit, the second thermostat unit may be configured as an integral unit, carries out heat exchange one time for flow between hot net water and recirculated cooling water.
Heating system the most according to claim 5, it is characterised in that the first thermostat unit, the second thermostat unit are set to an integral unit, uses water-water heat exchanger, carries out heat exchange between a heat supply network backwater and the recirculated cooling water flowed into.
Heating system the most according to claim 4, it is characterised in that the first thermostat unit is connected to a heat supply network return pipe of heat pump unit by heat supply network backwater water inlet pipe and heat supply network backwater exit branch with bypass mode；Second thermostat unit is connected to the recirculated cooling water inlet tube of heat pump unit by recirculated cooling water water inlet pipe and recirculated cooling water exit branch with bypass mode.
Heating system the most according to claim 7, it is characterised in that be provided with circulating cooling water regulating valve on the recirculated cooling water inlet tube between recirculated cooling water water inlet pipe and recirculated cooling water exit branch；Heat supply network backwater water inlet pipe is provided with heat supply network water regulating valve, recirculated cooling water water inlet pipe is provided with circulating cooling water regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620052417.7U CN205560932U (en) | 2016-01-14 | 2016-01-14 | Cold junction waste heat cascade utilization heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620052417.7U CN205560932U (en) | 2016-01-14 | 2016-01-14 | Cold junction waste heat cascade utilization heating system |
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| Publication Number | Publication Date |
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| CN205560932U true CN205560932U (en) | 2016-09-07 |
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ID=56820302
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| CN201620052417.7U Active CN205560932U (en) | 2016-01-14 | 2016-01-14 | Cold junction waste heat cascade utilization heating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546618A (en) * | 2016-01-14 | 2016-05-04 | 大唐(北京)能源管理有限公司 | Heating system and heating method for gradient utilization for cold-end waste heat |
| CN107289491A (en) * | 2017-08-04 | 2017-10-24 | 中能信创（北京）售电有限公司 | The heating system that a kind of residual heat of condensed water is coupled with waste water residual heat |
| CN112944451A (en) * | 2021-04-15 | 2021-06-11 | 晟源高科(北京)科技有限公司 | Natural gas energy supplementing graded utilization system based on pressure isolation station and adjusting method |
-
2016
- 2016-01-14 CN CN201620052417.7U patent/CN205560932U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546618A (en) * | 2016-01-14 | 2016-05-04 | 大唐(北京)能源管理有限公司 | Heating system and heating method for gradient utilization for cold-end waste heat |
| CN105546618B (en) * | 2016-01-14 | 2024-01-12 | 万隆新材(北京)科技有限公司 | Cascade utilization heat supply system and method for cold end waste heat |
| CN107289491A (en) * | 2017-08-04 | 2017-10-24 | 中能信创（北京）售电有限公司 | The heating system that a kind of residual heat of condensed water is coupled with waste water residual heat |
| CN112944451A (en) * | 2021-04-15 | 2021-06-11 | 晟源高科(北京)科技有限公司 | Natural gas energy supplementing graded utilization system based on pressure isolation station and adjusting method |
| CN112944451B (en) * | 2021-04-15 | 2022-05-27 | 晟源高科(北京)科技有限公司 | Natural gas energy supplementing graded utilization system based on pressure isolation station and adjusting method |
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| GR01 | Patent grant |