CN205979722U - Cold junction waste heat cascade utilization economizer system - Google Patents
Cold junction waste heat cascade utilization economizer system Download PDFInfo
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- CN205979722U CN205979722U CN201620782773.4U CN201620782773U CN205979722U CN 205979722 U CN205979722 U CN 205979722U CN 201620782773 U CN201620782773 U CN 201620782773U CN 205979722 U CN205979722 U CN 205979722U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model provides a cold junction waste heat cascade utilization economizer system, is including getting thermal system, heat medium control system, heating system, get hot system access circulating cooling water pipe way, thermal system and heating system are got in the connection of heat medium control system, get heat pump unit connection circulating cooling water pipe way and the intermediary water pipe way among the heat medium control system in the thermal system, intermediary's water tube coupling heating system among the heat medium control system, heating system insert wind in the boiler or secondary air system, and waste heat recovery and ladder utilization have reduced the loss of power device cold junction, have improved power device efficiency, install annual hours of operation and improve greatly, and economic nature improves greatly.
Description
Technical field
This utility model belongs to power plant for energy conservation field and in particular to a kind of cold end UTILIZATION OF VESIDUAL HEAT IN energy conserving system
Background technology
Coal is that (proportion accounting for primary energy consumption 2014 is 64.2% to the main primary energy of China, and 2015 pre-
It is calculated as 63.3%), it is concentrated mainly on thermoelectricity, metallurgical and building material industry.Fired power generating unit is main force's generating set of China, its installation
Capacity accounts for the 73% about 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 be a kind of using high-grade heat energy as drive energy, reclaim low grade heat energy setting for heat supply or intensification
Standby, it is widely used in the fields such as power plant, oil, chemical industry and metallurgy.Inevitably deposit during the heat to power output of power plant
In intrinsic cold source energy, modern power plants thermal efficiency of cycle is 40%～57%.Using heat pump reclaim steam power plant recirculated water/
Exhaust steam cold end low temperature exhaust heat, can improve the heat-economy of power plant, have significant energy-saving effect.
, there is load variations problem using the heat user of reclaimed heat in existing cold end residual-heat utilization technology.Winter has
A large amount of heat user, spring and summer autumn does not have heat user substantially.Reclaim the front-mounted heating (preheating) that heat is mainly used in Winter heat supply.This
Just there is very big application limitation.And in non-confession thermal region (such as southern province) and non-confession hot season (spring and summer autumn), waste heat
Retracting device cannot put into operation, and annual hours of operation is very effective.Largely reduce the economy of residual heat using device.
Utility model content
The purpose of this utility model is to provide one kind rationally to utilize power plant's cold end (recirculated water/exhaust steam) waste heat, improves energy
Source utilization ratio, realizes 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：A kind of exhaust heat stepped utilization energy conserving system of cold end,
Including taking hot systems, heating agent control system, heating system；Hot systems are taken to access recirculated cooling water pipeline, heating agent control system is even
Access hot systems and heating system；It is characterized in that：The heat pump unit in hot systems is taken to connect recirculated cooling water pipeline and heating agent
Intermediary's water lines in control system, in heating agent control system, intermediary's water lines connect heating system, and heating system accesses boiler
First air or secondary air system.
Further, hot systems are taken to include steam turbine, condenser, heat pump unit；Draw from steam turbine and drive steam pipework
Connect to heat pump unit, after heat pump unit heat exchange, condense into water；Condenser recirculated water accesses through water pump and recirculated water oral siphon
Heat pump unit, accesses cooling tower circulating water system through recirculated water return pipe after cooling；The intermediary's water carrying out closed cycle is through intermediary
Water oral siphon accesses heat pump unit, accesses heating system through intermediary's water return pipe after intensification.
Further, heating system includes boiler First air or secondary air system, boiler First air or secondary wind heating system
System；Intermediary's water after heating up in heat pump unit, accesses heating system, with boiler First air or the secondary wind heat exchange of inflow, in
Heat transfer in Jie's water is to boiler First air or secondary wind so as to heat up；Intermediary's water after cooling turns again to heat pump unit,
Boiler First air after intensification or secondary wind air inlet preheater continue to heat up.
Further, boiler First air or secondary wind heating system are to be arranged in air channel after First air or overfire air fan
One group or several groups of heating surfaces, its structure is made up of finned tube and header, including for accessing boiler First air or secondary air system
Inlet portion and export department；Intermediary's water accesses in finned tube.
Further, in succession and take hot systems in one end of heating agent control system, and the other end is ined succession heating system, including intermediary's water
Return pipe and intermediary's water oral siphon；Intermediary's water return pipe is additionally coupled to heat exchanger, accesses boiler First air after heat exchanger again
Or the oral siphon of secondary wind heating system；The return pipe of boiler First air or secondary wind heating system takes back intermediary after water pump
Water oral siphon.
Further, heat exchanger passes through pipeline and regulating valve introduces auxiliary heating working medium, is added using steam or hot water auxiliary
Hot mediation water.
Further, take be provided between intermediary's water return pipe of hot systems side and intermediary's water oral siphon bypass branch and
Regulating valve.
Further, heating agent control system also includes water charging system, pressure fixing system, drainage.
This utility model, according to the principle of energy cascade utilization, takes heat using heat pump from condenser recirculated water, heats one
Secondary wind or secondary wind, so that First air or secondary wind suitably heat up, thus improving boiler efficiency, reach the effect of energy-conservation.This
Cold end exhaust heat stepped utilization energy conserving system, has following features：
Take heat from condenser recirculated water, for heating boiler First air or secondary wind, properly increase pathogenic wind-warm.Waste heat recovery
And ladder utilizes, decrease power set cold end loss, improve power plant effiiency.
Overcome the limitation of other cold end residual-heat utilization technology.Heat user is boiler First air or secondary wind.Device one
The four seasons in year can put into operation, and can apply for thermal region and non-confession thermal region.The annual hours of operation of device greatly improves,
The economy of residual heat using device greatly improves.
Brief description
Fig. 1 is residual neat recovering system structural representation；
Specific embodiment
1 pair of this utility model is further described it will be appreciated that content described herein is only used for below in conjunction with the accompanying drawings
Description and interpretation this utility model, is not used to limit this utility model.
The exhaust heat stepped utilization energy conserving system of cold end of the present utility model, including three systems：A takes hot systems, B heating agent to control
System, C heating system；
Hot systems are taken to include steam turbine 1, condenser 2, heat pump unit 3；Heating system includes boiler First air or secondary wind
System, boiler First air or secondary wind heating system；Heating agent controls (hydrophily) system to include closed cycle intermediary water (hydrophily), pipe
Road, valve, heating vapour system, water charging system, pressure fixing system, drainage etc..
1st, hot systems are taken
Hot systems are taken to include steam turbine 1, condenser 2, heat pump unit 3.
The soda pop fluid entering heat pump unit has：The driving steam drawn from steam turbine by steam pipework 11；Condenser
Recirculated water；Closed cycle intermediary water (hydrophily).
Drawing from steam turbine drives steam pipework 11 to connect to heat pump unit, condenses into water after heat pump unit heat exchange.From
Heat pump unit is discharged condensate and is passed through the solidifying water heat regenerative system of pipeline 12 access.
Condenser recirculated water accesses heat pump unit from water pipe 8 through water pump 17 and recirculated water oral siphon 10, through circulation after cooling
Water return pipe 9 accesses and flows back to water pipe 7 from cooling tower 4, accesses condenser circulation.
Closed cycle intermediary water (hydrophily) accesses heat pump unit with uniform temperature through intermediary's water oral siphon 14, in warp after intensification
Jie's water return pipe 13 accesses heating system, in order to heating boiler First air or secondary wind, improves pathogenic wind-warm.With First air or secondary wind
Carry out the closed cycle intermediary water after heat exchange cooling and turn again to heat pump unit, constitute a circulation.Closed cycle intermediary water follows
Ring back and forth runs, and takes heat using heat pump from condenser recirculated water, then transfers heat to boiler First air or secondary wind.
2nd, heating system
Heating system includes boiler First air or secondary air system, boiler First air or secondary wind heating system.
Boiler First air or secondary wind heating system be as arranged in air channel 6 after First air or overfire air fan one group or
Several groups of heating surfaces.It is similar to that boiler economizer, is made up of finned tube and header.Including for access boiler First air or
The inlet portion 15 of secondary air system and export department 16.
Closed cycle intermediary water (hydrophily) after heating up in heat pump unit, accesses heating system, and intermediary's water walks flue wing
In piece heating surface of tubes pipe, with flowed into by inlet portion 15 and outside finned tube flowing boiler First air or secondary wind heat exchange, close
Then heat transfer in formula circulation intermediary's water (hydrophily) passes through export department 16 to boiler First air or secondary wind so as to heat up
Flow out and enter air preheater again.Closed cycle intermediary water after cooling turns again to heat pump unit, the boiler First air after intensification
Or secondary wind air inlet preheater continues to heat up.
3rd, heating agent controls (hydrophily) system
Heating agent controls (hydrophily) system to include closed cycle intermediary water (hydrophily), pipeline, valve, heating vapour system, benefit
Water system, pressure fixing system, drainage etc..
It is an intermediary system that heating agent controls (hydrophily) system, ins succession and take hot systems in one end, and the other end is ined succession heating system.
Closed cycle intermediary water circulation is back and forth run.By taking hot systems, the heat in condenser recirculated water passes to hydrophily；Logical
Cross heating system, by the heat transfer in hydrophily to boiler First air or secondary wind.
It is desalted water that heating agent controls the intermediary's water (hydrophily) in (hydrophily) system.The purpose of heating agent control system is in control
The temperature of Jie's water；Water charging system, pressure fixing system, drainage etc. belong to the regulating measure of system operation needs.
Intermediary's water return pipe 13 of heat pump unit connects to heat exchanger 19, by access after heat exchanger 19 boiler First air or
The oral siphon of secondary wind heating system；The return pipe of boiler First air or secondary wind heating system takes back intermediary after passing through water pump 18
Water oral siphon 14.Heat exchanger 19 passes through pipeline 22 and regulating valve 20 introduces auxiliary heating working medium, can be using steam or hot water auxiliary
Heating intermediary water, when heat pump unit takes shortage of heat, provided auxiliary heating is adjusted by regulating valve it is ensured that boiler First air or
The heating-up temperature of secondary wind；It is provided with bypass branch between intermediary's water return pipe 13 and intermediary's water oral siphon 14 of heat pump unit side
With regulating valve 21, for adjusting heat pump unit heat exchange amount, when taking heat excessive, open and adjust valve, make a part of intermediary
Water does not pass through heat pump unit, reduces actual heat exchange amount.
When whole energy conserving system runs,
Enter heat pump using the driving steam taking hot systems to extract certain pressure from steam turbine, after heat release, be condensed into condensation
Water；Heat pump work absorbs the circulating water afterheat accessing, intermediary's water in heating agent control system for the heating, the intermediary's water after heating
Access boiler First air or secondary wind heating system, heated boiler First air or secondary wind by intermediary's water heat release.
Normal operation mode：When heat pump unit takes heat and the guarantor between boiler First air or institute's calorific requirement of secondary wind that heats
During fair weighing apparatus, intermediary's water of heating agent control system all carries out heat exchange transmission.
Compensate working method：When heat pump unit takes shortage of heat, intermediary's water is heated further by supplementary heat exchanger, profit
With regulating valve adjustment provided auxiliary heating it is ensured that the heating-up temperature of boiler First air or secondary wind；
Bypass mode：When heat pump unit takes heat excessive, open the bypass in parallel of intermediary's water heat absorbing end, using tune
Section valve adjustment makes a part of intermediary water not pass through heat pump unit, reduces actual heat exchange amount.
In the actual application of heat pump, with the decline of outdoor temperature, its performance is with circulating cooling coolant-temperature gage
Drop and reduce.This utility model, according to the principle of energy cascade utilization, can effectively adjust and avoid boiler First air or secondary
The heating-up temperature of wind, the temperature fluctuation off-design value of recirculated cooling water, ensure the steady safe operation of heat pump, so that source pump is returned
Receive power plant's cold end waste heat maximized.Eliminate the restriction to heat pump application for the microthermal climate simultaneously to a certain extent, expand
The application in northern part cold district power plant for the heat pump.
This heating system is not limited to steam power plant using steam turbine it can also be used to the cold end of Combined cycle gas-steam turbine unit
Bootstrap system；It is not limited to reclaim the heat pump of circulating cooling water afterheat it can also be used to more than the cold end low-temperature heat source such as exhaust steam
The heat pump of recuperation of heat.
Finally it should be noted that：The foregoing is only explanation of the present utility model, be not limited to this utility model, to the greatest extent
Pipe has been described in detail to this utility model, and for a person skilled in the art, it still can be remembered to aforementioned
The technical scheme carrying is modified, or carries out equivalent to wherein some technical characteristics.All in spirit of the present utility model
Within principle, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.
Claims (8)
1. the exhaust heat stepped utilization energy conserving system of a kind of cold end, including taking hot systems, heating agent control system, heating system；Take heat system
System accesses recirculated cooling water pipeline, and the connection of heating agent control system takes hot systems and heating system；It is characterized in that：Take in hot systems
Heat pump unit connect intermediary's water lines in recirculated cooling water pipeline and heating agent control system, intermediary's water in heating agent control system
Pipeline connects heating system, and heating system accesses boiler First air or secondary air system.
2. cold end according to claim 1 exhaust heat stepped using energy conserving system it is characterised in that taking hot systems to include steamer
Machine, condenser, heat pump unit；Drawing from steam turbine drives steam pipework to connect to heat pump unit, solidifying after heat pump unit heat exchange
Form water；Condenser recirculated water accesses heat pump unit through water pump and recirculated water oral siphon, accesses through recirculated water return pipe after cooling
Cooling tower circulating water system；The intermediary's water carrying out closed cycle accesses heat pump unit through intermediary's water oral siphon, through intermediary after intensification
Water return pipe accesses heating system.
3. cold end according to claim 1 exhaust heat stepped using energy conserving system it is characterised in that heating system includes boiler
First air or secondary air system, boiler First air or secondary wind heating system；Intermediary's water after heating up in heat pump unit, accesses
Heating system, with boiler First air or the secondary wind heat exchange of inflow, the heat transfer in intermediary's water is to boiler First air or secondary
Wind is so as to heat up；Intermediary's water after cooling turns again to heat pump unit, the boiler First air after intensification or secondary wind air inlet
Preheater continues to heat up.
4. the exhaust heat stepped utilization energy conserving system of cold end according to claim 3 is it is characterised in that boiler First air or secondary
Wind heating system is a group or several groups of heating surfaces being arranged in air channel after First air or overfire air fan, its structure by finned tube and
Header forms, including inlet portion and export department for accessing boiler First air or secondary air system；Intermediary's water accesses finned tube
Interior.
5. the exhaust heat stepped utilization energy conserving system of cold end according to claim 1 it is characterised in that heating agent control system one
In succession and take hot systems in end, the other end is ined succession heating system, including intermediary's water return pipe and intermediary's water oral siphon；Intermediary's water return pipe
It is additionally coupled to heat exchanger, access the oral siphon of boiler First air or secondary wind heating system after heat exchanger again；Boiler is once
The return pipe of wind or secondary wind heating system takes back intermediary's water oral siphon after water pump.
6. the exhaust heat stepped utilization energy conserving system of cold end according to claim 5 it is characterised in that heat exchanger pass through pipeline and
Regulating valve introduces auxiliary heating working medium, using steam or hot water auxiliary heating intermediary water.
7. cold end according to claim 5 exhaust heat stepped using energy conserving system it is characterised in that taking hot systems side
It is provided with bypass branch and regulating valve between intermediary's water return pipe and intermediary's water oral siphon.
8. the exhaust heat stepped utilization energy conserving system of cold end according to claim 5 is it is characterised in that heating agent control system is also wrapped
Include water charging system, pressure fixing system, drainage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620782773.4U CN205979722U (en) | 2016-07-15 | 2016-07-15 | Cold junction waste heat cascade utilization economizer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620782773.4U CN205979722U (en) | 2016-07-15 | 2016-07-15 | Cold junction waste heat cascade utilization economizer system |
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| Publication Number | Publication Date |
|---|---|
| CN205979722U true CN205979722U (en) | 2017-02-22 |
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| CN201620782773.4U Active CN205979722U (en) | 2016-07-15 | 2016-07-15 | Cold junction waste heat cascade utilization economizer system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016241A (en) * | 2016-07-15 | 2016-10-12 | 大唐(北京)能源管理有限公司 | Cold-end waste heat gradient-utilization energy-saving system and method |
-
2016
- 2016-07-15 CN CN201620782773.4U patent/CN205979722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106016241A (en) * | 2016-07-15 | 2016-10-12 | 大唐(北京)能源管理有限公司 | Cold-end waste heat gradient-utilization energy-saving system and method |
| CN106016241B (en) * | 2016-07-15 | 2024-06-11 | 大唐环境产业集团股份有限公司 | Cold end waste heat cascade utilization energy-saving system and method |
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