CN214403695U - Cogeneration system coupled with geothermal energy - Google Patents
Cogeneration system coupled with geothermal energy Download PDFInfo
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- CN214403695U CN214403695U CN202023279193.9U CN202023279193U CN214403695U CN 214403695 U CN214403695 U CN 214403695U CN 202023279193 U CN202023279193 U CN 202023279193U CN 214403695 U CN214403695 U CN 214403695U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The utility model provides a combined heat and power generation system with geothermal energy coupling, the system includes steam ejector, absorption heat pump, heat supply network water heater, and the high temperature heat source of absorption heat pump is regarded as to the low temperature heat source of ground hot water as absorption heat pump after the low temperature steam that takes out from the steam turbine mixes with high temperature steam to heat the heat supply network circulating water. The utility model discloses an absorption heat pump retrieves the heat transfer to geothermal water, make full use of geothermal resource abundant area's geothermal energy, and reduced the steam extraction volume to coal generating set, make more steam can do work in the steam turbine, increased the generated energy of unit, therefore have characteristics such as efficient, economic environmental protection can regenerate.
Description
Technical Field
The utility model relates to a combined heat and power generation field especially relates to and uses in order to provide the combined heat and power generation system of efficiency with the geothermal energy coupling.
Background
In some northern areas, the time for residents to get warm is long and the temperature required is high, and common heat sources are provided by power plants in a unified manner. In order to meet the heat demand, the cogeneration is developed rapidly, most units in the north are subjected to heat supply transformation, and most units are subjected to extraction condensing heat supply in a steam extraction mode through a middle and low pressure cylinder communicating pipe. The heat supply mode has the defects of low efficiency, and the reason is that the steam with higher superheat degree in the heat supply network heater exchanges heat with the heat supply network water to cause larger work doing capacity loss, influence on the output of a unit, reduce the efficiency of the unit and have higher energy consumption. Steam of a steam turbine in a condensing heat supply mode is often far higher than steam parameters required by a heat supply network heater, so that high-grade steam of a unit is easily lost, the advantage of gradient utilization of combined heat and power generation energy is not fully exploited, and particularly, the energy-saving advantage of combined heat and power generation of a pure condensing reforming unit is different from that of a designed heat supply machine in the same grade. Therefore, in the process of cogeneration construction and transformation, a cogeneration system needs to be deeply researched, the cogeneration process is known from the perspective of the whole system, comprehensive performance analysis is carried out on a heat source, a heat supply network and heat users, and the energy-saving potential of the cogeneration system is deeply excavated. In order to more efficiently utilize a steam extraction and heat supply system of a steam turbine and realize deep energy conservation of a cogeneration unit, the steam extraction and heat supply system of the steam turbine is optimized according to the thermodynamic principle and following the energy conservation principle of 'temperature matching and cascade utilization', so that the steam extraction of the steam turbine is matched with the quality of a steam source required by a heat supply network side, on the basis of meeting the heat supply demand of the heat supply network, the steam extraction of a lower stage of the steam turbine is considered to replace a part of original middle and low pressure cylinder communicating pipes to extract steam to enter a heat supply network heater according to the characteristics of the steam turbine, the energy level matching of the steam turbine side and the heat supply network side is realized, the steam extraction amount of high-quality steam extraction can be effectively reduced, and the reasonable utilization of energy is realized.
In fact, in some northern areas, geothermal resources are abundant and are not easy to use. If only geothermal water is used for heating, the temperature of tail water is too high, coal-fired, oil-fired, gas-fired or electric boilers and the like are also needed as supplementary heat sources, and the geothermal energy is not fully utilized actually, so that the waste of low-grade heat sources is caused.
It can be known from the above that how to save steam extraction of the steam turbine and replace the steam extraction of the steam turbine to supply heat to the water in the residential heat supply network is a problem faced by the cogeneration unit, and the solution to this problem needs to be not only reconstructed from the steam extraction scheme of the unit itself, but also considered from the heat source of replacing heating, so that how to fully utilize geothermal resources to replace the steam in the unit to heat the water in the heat supply network is an urgent problem to be solved in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. To this end, the utility model provides a combined heat and power generation system with geothermal energy coupling, the system includes: the system comprises a boiler, a steam turbine, a condenser, a low-pressure heater, a deaerator, a high-pressure heater and a generator; boiler, steam turbine, generator, high pressure feed ware, oxygen-eliminating device, low pressure feed ware link to each other in proper order, constitute a complete thermal power generation subsystem, still include steam ejector, absorption heat pump, heat supply network water heater, wherein:
the low-temperature steam and the high-temperature steam respectively extracted from the steam turbine are mixed at the steam ejector, then enter the absorption heat pump and provide a high-temperature heat source for the absorption heat pump, and the steam is condensed and then returns to a water-steam circulating system of the thermal power generation subsystem;
the geothermal water enters the heat supply network water heater, exchanges heat with the heat supply network circulating water flowing out of the absorption heat pump, then enters the absorption heat pump, provides a low-temperature heat source for the absorption heat pump, heats the heat supply network circulating water, and then flows out of the absorption heat pump and is refilled underground;
and the heat supply network circulating water enters the absorption heat pump, is heated and then enters the heat supply network water heater, and then flows out and is provided for a heat user.
Furthermore, high-temperature steam extracted from the steam turbine is 3 extracted steam, low-temperature steam extracted from the steam turbine is 5 extracted steam, the steam ejector takes the 3 extracted steam as working steam, and the 5 extracted steam as injection steam to be mixed into a high-temperature heat source for supplying heat to the absorption heat pump.
Further, the boiler is a coal-fired boiler or a biomass boiler.
Further, the absorption heat pump is a lithium bromide heat pump.
Further, the feed water pump is used for providing power for a water-steam circulating system of the thermal power generation subsystem.
The utility model provides a pair of with combined heat and power generation system of geothermal energy coupling retrieves the heat transfer through absorption heat pump to geothermal water, make full use of geothermal resource abundance area's geothermal energy, and reduced the steam extraction volume to coal generating set, make more steam can do work in the steam turbine, increased the generated energy of unit, therefore have characteristics such as efficient, economic environmental protection can be regenerated.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a cogeneration system coupled with geothermal energy according to the present invention.
Wherein, 1-a boiler; 2-a steam turbine; 3-a condenser; 4-a steam ejector; 5- #6 low pressure heater; 6- #5 low pressure heater; 7-a deaerator; 8- #4 low pressure heater; 9-a water supply pump; 10- #2 high pressure heater; 11- #1 high pressure heater; 12-a generator; 13-an absorption heat pump; 14-heat supply network water heater
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In addition, in the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, they may be mechanically or electrically connected, or they may be connected to each other within two elements, directly or indirectly through an intermediate medium, and those skilled in the art may understand the specific meanings of the above terms according to specific situations.
Further, in the description of any method below, any process or method description in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system.
The present embodiment discloses a cogeneration system coupled with geothermal energy, said system comprising: a boiler 1, a steam turbine 2, a condenser 3 and a #6 low-pressure heater 5; a #5 low-pressure heater 6, a #4 low-pressure heater 8, a deaerator 7, a water feed pump 9, a #2 high-pressure heater 10, a #1 high-pressure heater 11 and a generator 12; boiler 1, steam turbine 2, generator 12, high pressure feed water heater 10-11, oxygen-eliminating device 7, low pressure feed water heater 5-6, 8 link to each other in proper order, constitute a complete thermal power generation subsystem, the system still includes steam ejector 4, absorption heat pump 13, heat supply network water heater 14, wherein:
the low-temperature steam and the high-temperature steam respectively extracted from the steam turbine 2 are mixed at the steam ejector 4, then enter the absorption heat pump 13 and provide a high-temperature heat source for the absorption heat pump 13, and the steam is condensed and then returns to a water-steam circulating system of the thermal power generation subsystem;
the geothermal water enters the heat supply network water heater 14, exchanges heat with the heat supply network circulating water flowing out of the absorption heat pump 13, then enters the absorption heat pump 13, provides a low-temperature heat source for the absorption heat pump 13, heats the heat supply network circulating water, and then flows out of the absorption heat pump 13 and is refilled underground;
the heat supply network circulating water enters the absorption heat pump 13, is heated and then enters the heat supply network water heater 14, and then flows out and is provided for heat users.
Specifically, the high-temperature steam extracted from the steam turbine is 3 extracted steam, the low-temperature steam extracted from the steam turbine is 5 extracted steam, and the steam ejector 4 takes the 3 extracted steam as working steam and the 5 extracted steam as injection steam to be mixed into a high-temperature heat source for supplying heat to the absorption heat pump 13.
Specifically, the boiler 1 is a coal-fired boiler or a biomass boiler.
Specifically, the absorption heat pump 13 is a lithium bromide heat pump.
Specifically, the system further comprises a water feeding pump 9, and the water feeding pump 9 is used for providing power for a water-steam circulating system of the thermal power generation subsystem.
The utility model discloses can reach following technological effect:
1. the geothermal energy of the areas with rich geothermal resources is fully utilized, and the problems of large steam quantity and serious heat loss required by the heat supply of the coal-fired unit are reduced.
2. Compared with the conventional heat supply, the geothermal water resource heat supply has the advantage of being renewable.
3. The absorption heat pump is used for recovering and exchanging geothermal water, so that geothermal water energy as a low-grade heat source is effectively recovered, and heat supply network water is fully heated in the heat pump.
4. After the steam ejector is used, high-temperature high-pressure steam is used for pumping low-temperature low-pressure steam and is mixed into steam with proper parameters for use, the consumption of high-grade steam is further reduced, more steam can work in the steam turbine, and the generating capacity of the unit is increased.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A cogeneration system coupled with geothermal energy, the system comprising: the system comprises a boiler (1), a steam turbine (2), a condenser (3), low-pressure heaters (5-6, 8), a deaerator (7), high-pressure heaters (10-11) and a generator (12); boiler (1), steam turbine (2), generator (12), high pressure feed water heater (10-11), oxygen-eliminating device (7), low pressure feed water heater (5-6, 8) link to each other in proper order, constitute a complete thermal power generation subsystem, its characterized in that: still include steam ejector (4), absorption heat pump (13), heat supply network water heater (14), wherein:
low-temperature steam and high-temperature steam respectively extracted from the steam turbine (2) are mixed at the steam ejector (4), then enter the absorption heat pump (13) and provide a high-temperature heat source for the absorption heat pump (13), and the steam is condensed and then returns to a water-steam circulating system of the thermal power generation subsystem;
the geothermal water enters the heat supply network water heater (14), exchanges heat with the heat supply network circulating water flowing out of the absorption heat pump (13), then enters the absorption heat pump (13), provides a low-temperature heat source for the absorption heat pump (13), heats the heat supply network circulating water, and then flows out of the absorption heat pump (13) and is refilled underground;
the heat supply network circulating water enters the absorption heat pump (13), is heated and then enters the heat supply network water heater (14), and then flows out and is provided for a heat user.
2. The system of claim 1, wherein: the high-temperature steam extracted from the steam turbine is 3 extracted steam, the low-temperature steam extracted from the steam turbine is 5 extracted steam, the steam ejector (4) takes the 3 extracted steam as working steam, and the 5 extracted steam as injection steam to be mixed into a high-temperature heat source for supplying heat to the absorption heat pump (13).
3. The system of claim 1, wherein: the boiler (1) is a coal-fired boiler or a biomass boiler.
4. The system of claim 1, wherein: the absorption heat pump (13) is a lithium bromide heat pump.
5. The system of claim 1, wherein: the system also comprises a feed water pump (9), wherein the feed water pump (9) is used for providing power for the water-steam circulating system of the thermal power generation subsystem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023279193.9U CN214403695U (en) | 2020-12-29 | 2020-12-29 | Cogeneration system coupled with geothermal energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023279193.9U CN214403695U (en) | 2020-12-29 | 2020-12-29 | Cogeneration system coupled with geothermal energy |
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| CN214403695U true CN214403695U (en) | 2021-10-15 |
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| CN202023279193.9U Active CN214403695U (en) | 2020-12-29 | 2020-12-29 | Cogeneration system coupled with geothermal energy |
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