CN105757644A - Energy-saving and emission-reducing system and method for thermal power plant - Google Patents
Energy-saving and emission-reducing system and method for thermal power plant Download PDFInfo
- Publication number
- CN105757644A CN105757644A CN201610271041.3A CN201610271041A CN105757644A CN 105757644 A CN105757644 A CN 105757644A CN 201610271041 A CN201610271041 A CN 201610271041A CN 105757644 A CN105757644 A CN 105757644A
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- Prior art keywords
- water
- heat
- closed
- miniature
- heat pump
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to an energy-saving and emission-reducing system and method for a thermal power plant.At present, no thermal-power-plant energy-saving and emission-reducing system and method capable of effectively reducing the power generation cost of a thermal power plant, saving energy and indirectly reducing emission exist.The system comprises a power station boiler and a steam turbine, and is characterized by further comprising an open-type water system, a closed-type water heat exchanger, a closed-type water system, a miniature heat pump driving steam source, a miniature heat pump and a heating-network secondary water heat exchanger; the open-type water system and the closed-type water system are connected through the closed-type water heat exchanger, the closed-type water system is connected with the miniature heat pump, the miniature heat pump is connected with the heating-network secondary water heat exchanger, and the steam turbine and the miniature heat pump are connected through the miniature heat pump driving steam source.According to the method, in the heating-network heat supply period, the heat of the closed-type water system is transferred to a heating network system through the miniature heat pump, it is achieved that an open-type water pump is stopped to save energy and reduce emission, the heat of the closed-type water system is transferred to a heating network for use, and indirect energy saving and indirect emission reduction are achieved.By means of the system and method, the power generation cost of a thermal power plant can be effectively reduced, and energy can be saved.
Description
Technical field
The present invention relates to a kind of energy saving for power plants emission-reducing system and method, especially relate to a kind of thermal power plant's closed Water System energy reutilization system and method, it is possible to the existing machine set system of Appropriate application, utilize the energy that closed Water System is wasted, stoppage in transit open type water pump, thus reaching the purpose of energy-saving and emission-reduction.
Background technology
In totally ten eight the fifth plenary sessions are passed through " Central Committee of the Communist Party of China is about the suggestion formulating the 13rd five-year-plan of national economy and social development " like never before " green " is orientated as " idea of development " together with " innovation, coordination, open, shared ", as " 13 " so that more over a long time China five develop on a large scale one of thinking, developing direction, development impetus, through each link in each field of " 13 " socio-economic development." 13 ", as the important transition period of China's economic new and old development kinetic energy, Green Development is expected to become new power, promotes sustained economic growth, upgrading upgrading.
" 13 ", China to be accomplished to the year two thousand twenty per GDP carbon emission international commitments low-carbon (LC) target than decline 40%～45% in 2005, and to be that the China proposed in Sino-U.S. climate change joint statement to reach long-term low carbon development target in the peak value of carbon emission about the year two thousand thirty and lays the foundation, in the environmental index such as prevention and control of air pollution, to have obtained significant results simultaneously.Meanwhile, " 13 " period is the critical period that China builds up well-off society comprehensively, China's GDP speedup has proceeded to high speed and has increased, in the process of new normality, industrialization, Development of China's Urbanization has been enter into the new stage, economic transition, the energy also faces a lot of difficulty transition, properly handle the relation of resource environment and the sustainable development of socio-economy, and it is big according to 18, 18 three neutralize new spirit and the new demand that the Fourth Plenary Session Of the Party Central Committee proposes, in-depth reform, run the country according to law, promote energy revolution, adapt to new situations science adjustment and improve the thinking of Policy of carbon reduction.
For this, saving energy emissions-reducing becomes the most important thing of energy field work.Also there are some energy saving for power plants emission-reducing systems now, if publication date is on 09 30th, 2015, publication number is in the Chinese patent of CN104949100A, disclose a kind of energy saving for power plants system, this energy saving for power plants system adopts installs flue gas heat-exchange unit Mist heat recovering at boiler back end ductwork, utilizing this partial heat to add heat primary air, secondary wind and condensation water, thus reducing boiler coal consumption, the effects of energy saving and emission reduction of this energy saving for power plants system can also improve further.
There is presently no a kind of reasonable in design, it is possible to effectively reduce the cost of electricity-generating of thermal power plant, save the energy, the energy saving for power plants emission-reducing system of indirect emissions-reducing and method.
Summary of the invention
It is an object of the invention to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, it is possible to effectively reduce the cost of electricity-generating of thermal power plant, save the energy, the energy saving for power plants emission-reducing system of indirect emissions-reducing and method.
This invention address that the problems referred to above be the technical scheme is that, this energy saving for power plants emission-reducing system includes station boiler, steam turbine, condenser and power plant cooling tower, described steam turbine and station boiler connect, described condenser and steam turbine connect, described power plant cooling tower and condenser connect, its construction features is in that: also include open water system, closed-up water heat exchanger, closed Water System, miniature heat pump drives vapour source, miniature heat pump and heat supply network secondary water water-to-water heat exchanger, described open water system and closed Water System are connected by closed-up water heat exchanger, described closed Water System and miniature heat pump connect, described miniature heat pump and heat supply network secondary water water-to-water heat exchanger connect, described heat supply network secondary water water-to-water heat exchanger and heat user connect, described steam turbine and miniature heat pump drive vapour source to connect by miniature heat pump.
A kind of energy saving for power plants discharge-reducing method, it is characterized in that: use described energy saving for power plants emission-reducing system, the step of described energy saving for power plants discharge-reducing method is as follows: in the heat supply network heat supply phase, the heat of closed Water System is converted to heat network system heating heat supply network backwater by miniature heat pump, realize stoppage in transit open type water pump energy-saving and emission-reduction, the heat of closed Water System is transferred to again heat supply network and utilizes, it is achieved indirect energy saving reduces discharging；In the non-heat supply phase, the heat of closed Water System uses open water system to be transferred to circulation discharge.
As preferably, miniature heat pump of the present invention drives vapour source to be five sections of steam supplies that draw gas, and miniature heat pump is positioned at closed Water System according to flow process after closed-up water heat exchanger, cools down to closed Water System with miniature heat pump during acting on heat supply phase stoppage in transit open type water pump.
As preferably, miniature heat pump of the present invention drives the energy of five sections of the vapour source energy drawn gas and closed Water System to be all transferred to the backwater of heat supply network recirculated water.
The present invention is compared with prior art, have the following advantages and effect: structure is very simple, it is easy to existing equipment is transformed, it is easy to be extended and applied, wide market, five sections of main steam turbine draw gas and only transform supply driving vapour source, just can be realized stoppage in transit open type water pump by simple structure and reduce the requirement of unit station service power consumption rate, it is achieved closed Water System energy recycling reaches the purpose of energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is the structural representation of energy saving for power plants emission-reducing system in the embodiment of the present invention.
In figure: 1 station boiler；2 steam turbines；3 condensers；4 power plant cooling towers；5 open water systems；6 closed-up water heat exchangers；7 closed Water System；8 miniature heat pumps drive vapour source；9 miniature heat pumps；10 heat supply network secondary water water-to-water heat exchangers；11 heat user.
Detailed description of the invention
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following example are explanation of the invention and the invention is not limited in following example.
Embodiment.
Referring to Fig. 1, the energy saving for power plants emission-reducing system in the present embodiment includes station boiler 1, steam turbine 2, condenser 3, power plant cooling tower 4, open water system 5, closed-up water heat exchanger 6, closed Water System 7, miniature heat pump driving vapour source 8, miniature heat pump 9 and heat supply network secondary water water-to-water heat exchanger 10.
Steam turbine 2 and station boiler 1 in the present embodiment connect, condenser 3 and steam turbine 2 connect, power plant cooling tower 4 and condenser 3 connect, open water system 5 and closed Water System 7 are connected by closed-up water heat exchanger 6, closed Water System 7 and miniature heat pump 9 connect, miniature heat pump 9 and heat supply network secondary water water-to-water heat exchanger 10 connect, and heat supply network secondary water water-to-water heat exchanger 10 and heat user 11 connect, and steam turbine 2 and miniature heat pump 9 drive vapour source 8 to connect by miniature heat pump.
In the present embodiment, the step of energy saving for power plants discharge-reducing method is as follows: in the heat supply network heat supply phase, the heat of closed Water System 7 is converted to heat network system heating heat supply network backwater by miniature heat pump 9, realize stoppage in transit open type water pump energy-saving and emission-reduction, the heat of closed Water System 7 is transferred to again heat supply network and utilizes, it is achieved indirect energy saving reduces discharging；In the non-heat supply phase, the heat of closed Water System 7 uses open water system 5 to be transferred to circulation discharge.
Miniature heat pump drives vapour source 8 to be five sections of steam supplies that draw gas, and miniature heat pump 9 is positioned at closed Water System 7 according to flow process after closed-up water heat exchanger 6, cools down to closed Water System 7 with miniature heat pump 9 during acting on heat supply phase stoppage in transit open type water pump.Miniature heat pump drives the energy of 8 five sections of the vapour source energy drawn gas and closed Water System 7 to be all transferred to the backwater of heat supply network recirculated water, compares noenergy loss with the original five sections heating heat exchangers for district heatings that draw gas.Non-heating period system switches to original open water system 5 and cools down closed Water System.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different, and the above content described in this specification is only to present configuration example explanation.All equivalences done according to the structure described in inventional idea of the present invention, feature and principle change or simple change, are all included in the protection domain of patent of the present invention.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art; without departing from the structure of the present invention or surmount the scope that present claims book is defined, protection scope of the present invention all should be belonged to.
Claims (4)
1. an energy saving for power plants emission-reducing system, including station boiler, steam turbine, condenser and power plant cooling tower, described steam turbine and station boiler connect, described condenser and steam turbine connect, described power plant cooling tower and condenser connect, it is characterized in that: also include open water system, closed-up water heat exchanger, closed Water System, miniature heat pump drives vapour source, miniature heat pump and heat supply network secondary water water-to-water heat exchanger, described open water system and closed Water System are connected by closed-up water heat exchanger, described closed Water System and miniature heat pump connect, described miniature heat pump and heat supply network secondary water water-to-water heat exchanger connect, described heat supply network secondary water water-to-water heat exchanger and heat user connect, described steam turbine and miniature heat pump drive vapour source to connect by miniature heat pump.
2. an energy saving for power plants discharge-reducing method, it is characterized in that: use energy saving for power plants emission-reducing system as claimed in claim 1, the step of described energy saving for power plants discharge-reducing method is as follows: in the heat supply network heat supply phase, the heat of closed Water System is converted to heat network system heating heat supply network backwater by miniature heat pump, realize stoppage in transit open type water pump energy-saving and emission-reduction, the heat of closed Water System is transferred to again heat supply network and utilizes, it is achieved indirect energy saving reduces discharging；In the non-heat supply phase, the heat of closed Water System uses open water system to be transferred to circulation discharge.
3. energy saving for power plants discharge-reducing method according to claim 2, it is characterized in that: miniature heat pump drives vapour source to be five sections of steam supplies that draw gas, miniature heat pump is positioned at closed Water System according to flow process after closed-up water heat exchanger, cools down to closed Water System with miniature heat pump during acting on heat supply phase stoppage in transit open type water pump.
4. energy saving for power plants discharge-reducing method according to claim 2, it is characterised in that: miniature heat pump drives the energy of five sections of the vapour source energy drawn gas and closed Water System to be all transferred to the backwater of heat supply network recirculated water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271041.3A CN105757644A (en) | 2016-04-27 | 2016-04-27 | Energy-saving and emission-reducing system and method for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271041.3A CN105757644A (en) | 2016-04-27 | 2016-04-27 | Energy-saving and emission-reducing system and method for thermal power plant |
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| Publication Number | Publication Date |
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| CN105757644A true CN105757644A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610271041.3A Pending CN105757644A (en) | 2016-04-27 | 2016-04-27 | Energy-saving and emission-reducing system and method for thermal power plant |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2455579A (en) * | 2007-12-13 | 2009-06-17 | Martin Perrin | Heat pump comprising an inverter drive compressor |
| CN201836968U (en) * | 2010-10-26 | 2011-05-18 | 北京国电电科院节能技术有限公司 | Cogeneration energy saving device utilizing waste heat of indirect air cooling unit for heat supply |
| CN202007693U (en) * | 2011-02-17 | 2011-10-12 | 华电电力科学研究院 | Recovery device for low-temperature waste heat in power plant |
| CN102721094A (en) * | 2012-06-14 | 2012-10-10 | 华电电力科学研究院 | Heating system for recycling waste heat of open circulating water in power plant |
-
2016
- 2016-04-27 CN CN201610271041.3A patent/CN105757644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2455579A (en) * | 2007-12-13 | 2009-06-17 | Martin Perrin | Heat pump comprising an inverter drive compressor |
| CN201836968U (en) * | 2010-10-26 | 2011-05-18 | 北京国电电科院节能技术有限公司 | Cogeneration energy saving device utilizing waste heat of indirect air cooling unit for heat supply |
| CN202007693U (en) * | 2011-02-17 | 2011-10-12 | 华电电力科学研究院 | Recovery device for low-temperature waste heat in power plant |
| CN102721094A (en) * | 2012-06-14 | 2012-10-10 | 华电电力科学研究院 | Heating system for recycling waste heat of open circulating water in power plant |
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Application publication date: 20160713 |