CN211777845U - Geothermal photo-thermal combined type continuous power generation system - Google Patents
Geothermal photo-thermal combined type continuous power generation system Download PDFInfo
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- CN211777845U CN211777845U CN202020092732.9U CN202020092732U CN211777845U CN 211777845 U CN211777845 U CN 211777845U CN 202020092732 U CN202020092732 U CN 202020092732U CN 211777845 U CN211777845 U CN 211777845U
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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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- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The utility model provides a geothermal photo-thermal combined type continuous power generation system, which comprises a geothermal water circulating system, a photo-thermal heat collection system, a power generation system and a condensation system; the geothermal water circulating system is connected with the photo-thermal heat collecting system, and the working medium provides energy for the power generation system to generate power through the geothermal water circulating system and/or the photo-thermal heat collecting system; the power generation system is connected with the condensing system, and the condensing system condenses exhaust of the power generation system and then sends the exhaust into the geothermal water circulating system. This practicality utilizes solar energy and parallelly connected combined cycle power generation system of geothermal energy, will utilize solar energy power generation and geothermal energy electricity generation organic to combine together, has improved combined cycle power generation system's thermal efficiency.
Description
Technical Field
The utility model relates to a renewable resources power generation technical field especially relates to a geothermal light and heat combined type continuous power generation system.
Background
Geothermal resources are renewable clean energy, have the characteristics of cleanness, environmental protection, wide application, good stability, cyclic utilization and the like, are not interfered by external factors such as seasons, climates, day and night changes and the like, and are realistic and competitive new energy.
China has abundant geothermal resources and wide distribution, is the first major country for directly utilizing world geothermal energy, but a large amount of medium-temperature geothermal resources (90-150 ℃) are adopted for single geothermal heating, the temperature requirement is lower (about 50 ℃), and the waste of geothermal energy grade is caused from the thermodynamic perspective; and the annual heating time is generally 4-5 months, so that the capability of geothermal resources cannot be fully exerted, and the project revenue generating capacity and profit space are limited. In the aspect of geothermal power generation, although China actively explores and makes contributions to the field of medium-temperature and low-temperature geothermal power generation, low-parameter heat source power generation is generally low in efficiency, small in installed load and limited in profitability due to the limited grade of geothermal resources.
Solar energy is also a renewable clean energy, and along with the continuous improvement of the photo-thermal power generation technology, the efficiency of the photo-thermal power generation system with high steam parameters is greatly improved. However, solar energy is significantly affected by factors such as time and weather, and although the photo-thermal power station is installed in a large scale, the load fluctuation is significant and the photo-thermal power station cannot continuously operate, so that the load of power grid peak regulation is increased, and light abandon is easily caused. In order to realize continuous operation, some photo-thermal projects adopt gas afterburning or energy storage devices, but the former has high operation cost, and the latter has large investment and unsatisfactory project benefits.
Compared with the characteristics of two clean renewable energy sources of terrestrial heat and solar energy, complementary conditions exist in the aspects of energy grade, space-time distribution rule, power generation utilization scale, energy utilization hours and the like, so that the terrestrial heat and the solar energy are compounded, the advantages of the two clean renewable energy sources can be made up for the deficiencies, and the advantages of the two clean renewable energy sources are exerted to the maximum.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a continuous power generation system of geothermal light and heat combined type.
The technical scheme of the utility model is as follows:
a geothermal photo-thermal composite continuous power generation system comprising:
the system comprises a geothermal water circulating system, a photo-thermal heat collecting system, a power generation system and a condensing system;
the geothermal water circulating system is connected with the photo-thermal heat collection system through a pipeline, and the working medium provides energy through the geothermal water circulating system and/or the photo-thermal heat collection system and supplies the energy to the power generation system for power generation;
the power generation system is connected with the condensing system through a pipeline, and the condensing system condenses exhaust of the power generation system and then sends the exhaust into the geothermal water circulating system.
Optionally, the power generation system includes a high-pressure turbine generator set, a first generator, a low-pressure turbine generator set, and a second generator;
the photo-thermal heat collection system, the high-pressure turbine generator set and the first generator are sequentially connected through pipelines;
the geothermal water circulating system, the low-pressure turbine generator set and the second generator are sequentially connected through pipelines;
the high-pressure turbine generator set is connected with the low-pressure turbine generator set through a pipeline, and the low-pressure turbine generator set is connected with the condensing system through a pipeline.
Optionally, the geothermal water circulation system comprises a submersible pump, a cyclone sand remover, a geothermal heat exchanger, a geothermal tail water filter and a recharging pressure pump which are connected in sequence;
the geothermal heat exchanger is connected with the photo-thermal heat collection system through a pipeline;
the geothermal heat exchanger, the low-pressure turbine generator set and the second generator are sequentially connected through pipelines.
Optionally, the geothermal water circulation system further comprises a geothermal production well and a geothermal recharging well, the submersible pump is arranged in the geothermal production well, and the recharging pressure pump is arranged in the geothermal recharging well.
Optionally, the high-pressure turbine generator set is a back pressure turbine, and the low-pressure turbine generator set is an ORC turbine generator set.
Optionally, the system further comprises a control system, wherein the control system comprises a first valve, a second valve and a third valve; the first valve is arranged on a connecting pipeline between the geothermal heat exchanger and the photo-thermal heat collection system; the second valve is arranged on a connecting pipeline between the geothermal heat exchanger and the low-pressure turbine generator set; and the third valve is arranged on a connecting pipeline between the high-pressure turbine generator set and the low-pressure turbine generator set.
Optionally, the condensing system comprises a condenser and a working medium pump; the condenser is connected with the low-pressure turbine generator set through a pipeline; and the condenser condenses the exhaust gas of the power generation system and then sends the exhaust gas into the geothermal heat exchanger through the working medium pump.
Optionally, the system further comprises a cooling system, wherein the cooling system comprises a cooling tower and a cooling water pump; and the condenser is connected with the cooling tower pipeline through the cooling water pump.
This practicality has following beneficial effect:
the combined cycle power generation system with the parallel connection of the solar energy and the geothermal energy is used, the solar power generation and the geothermal energy power generation are organically combined, and the heat efficiency of the combined cycle power generation system is improved; when solar radiation is sufficient and available in the daytime, geothermal energy and solar energy are combined to generate power, when the solar radiation is cloudy or at night, geothermal energy is used for transitional power generation, and solar energy can be used for power generation independently in the daytime, so that combined cycle uninterrupted power generation is realized.
Further, a first valve, a second valve and a third valve are adopted; the first valve is arranged on a connecting pipeline of the geothermal heat exchanger and the photothermal heat collection system; the second valve is arranged on a connecting pipeline of the geothermal heat exchanger and the low-pressure turbine generator set; and the third valve is arranged on a connecting pipeline between the high-pressure turbine generator set and the low-pressure turbine generator set. When the illumination is sufficient in the daytime, the second valve is kept closed, the first valve and the third valve are opened, the system realizes a complete high-pressure and low-pressure unit combined operation mode, and geothermal energy and solar energy are fully utilized to generate electricity. When the solar radiation is insufficient at night, in cloudy days and the like, the second valve is gradually opened, the first valve and the third valve are gradually closed, the system is stably transited to the low-voltage unit operation mode, the geothermal energy is adopted for power generation, the continuous and stable output of electric power and the slow change of load are realized, and the influence of the interruption or sudden change of the load on the power grid is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the embodiment of the present invention.
1-a geothermal production well; 2-cyclone desander; 3-geothermal heat exchanger; 4-geothermal tail water filter; 5-recharging the pressure pump; 6-geothermal recharging well; 7-a photo-thermal heat collection system; 8-a high-pressure turbine generator set; 9-a low-pressure turbine generator set; 10-a condenser; 11-a working medium pump; 12-a cooling tower; 13-a cooling water pump; 14-a submersible pump; 15-a first valve; 16-a second valve; 17-third valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
Fig. 1 is a schematic structural diagram of the present application, and fig. 2 is a schematic structural diagram of the present application, as shown in fig. 1 and fig. 2:
a geothermal photo-thermal combined type continuous power generation system comprises a geothermal water circulating system, a photo-thermal heat collection system 7, a power generation system and a condensation system; the geothermal water circulating system is connected with the photo-thermal heat collecting system 7, and the working medium provides energy through the geothermal water circulating system and/or the photo-thermal heat collecting system 7 to supply the power generating system with the energy for power generation; and the power generation system is connected with the condensing system, and the condensing system condenses the exhaust gas of the power generation system and then sends the exhaust gas into the geothermal water circulating system.
The geothermal water circulating system comprises a submersible pump 14, a geothermal production well 1, a rotational flow sand remover 2, a geothermal heat exchanger 3, a geothermal tail water filter 4, a recharging pressure pump 5 and a geothermal recharging well 6.
The geothermal fluid in the geothermal production well 1 is extracted by a submersible pump 14, sand is removed by a cyclone desander 2 and enters a geothermal heat exchanger 3, the geothermal fluid in the geothermal heat exchanger 3 is transferred to a low boiling point circulating working medium through heat exchange, and the cooled geothermal fluid is filtered by a geothermal tail water filter 4 and then is sent to a geothermal recharging well 6 by a recharging pressure pump 5.
The geothermal fluid comprises geothermal steam type fluid, geothermal steam-water mixed type fluid or geothermal hot water type fluid. The circulating medium adopts a low boiling point working medium which comprises a single organic working medium, a multi-element organic working medium, carbon dioxide and the like.
The geothermal heat exchanger 3 can adopt a mode that a circulating working medium flows through a tube side and geothermal water flows through a shell side, or a mode that the circulating working medium flows through the shell side and geothermal water flows through the tube side.
The power generation system comprises a high-pressure turbine generator set 8, a first generator, a low-pressure turbine generator set 9 and a second generator;
the photo-thermal heat collection system 7, the high-pressure turbine generator set 8 and the first generator are sequentially connected;
the geothermal water circulating system, the low-pressure turbine generator set 9 and the second generator are connected in sequence;
the high-pressure turbine generator set 8 is connected with the low-pressure turbine generator set 9, and the low-pressure turbine generator set 9 is connected with the condensing system.
The system comprises a geothermal heat exchanger 3, a circulating working medium outlet of the geothermal heat exchanger 3, a circulating working medium inlet of a photothermal heat collecting system 7, a high-boiling point circulating working medium outlet of the photothermal heat collecting system 7, a high-pressure turbine generator set 8 and a low-pressure turbine generator set 9, a steam discharge outlet of the low-pressure turbine generator set 9, a condenser 10, a liquid working medium outlet of the condenser 10, a low-temperature working medium loop pipeline, a working medium pump 11, a high-pressure turbine generator set 8, a first generator, a low-pressure turbine generator set 9, a second generator, a geothermal heat exchanger 3, a cooling water inlet of the condenser 10, a cooling water outlet of a cooling tower 12, a water inlet of the cooling tower 12, a cooling water outlet of the condenser 10, a cooling water pump 13, a pipeline, a circulating working medium inlet of the low-temperature turbine generator set 9, wherein, the high-pressure turbine generator set 8 adopts a back pressure turbine.
A first valve 15 is arranged between the outlet of the circulating working medium of the geothermal heat exchanger 3 and the inlet of the circulating working medium of the photothermal heat collection heat exchange system 7, a second valve 16 is arranged between the outlet of the circulating working medium of the geothermal heat exchanger 3 and the steam inlet of the low-pressure turbine generator set 9, and a third valve 17 is arranged between the back pressure turbine and the low-pressure turbine generator set 9.
Valves are arranged on the pipeline loop of the geothermal water circulating system, the connecting pipeline of the photo-thermal heat collecting system, the connecting pipeline of the power generating system and the pipelines of the condensing system and the cooling system.
The low-parameter and low-boiling-point circulating working medium which is heated and gasified in the geothermal heat exchanger 3 enters the photo-thermal heat collection and heat exchange system 7 and is further heated into high-parameter superheated gas by the gathered solar radiation heat, the high-parameter superheated gas is sequentially sent into the back pressure turbine and the low-pressure turbine generator set 9 to respectively drive the first generator and the second generator to generate electricity, exhaust gas after acting enters the condenser 10 and is cooled and liquefied into liquid working medium by circulating cooling water, and the liquid working medium is sent into the geothermal heat exchanger 3 again by the working medium pump 11 to complete thermodynamic cycle. The low-pressure turbine generator set 9 adopts an ORC turbine generator set, and the ORC turbine is used for realizing that Organic Rankine Cycle (ORC for short) using low-boiling point Organic matters as working media enters the interior of the ORC turbine generator set to perform mechanical expansion work so as to drive the generator to generate electricity.
The number of the geothermal production wells 1 is determined according to the minimum working medium flow required by the low-pressure turbine generator set and the heat source load required by the parameters; the number of the geothermal recharge wells 6 is determined according to the number of geothermal production wells and geothermal geological recharge conditions; the solar heat collector of the photo-thermal heat collection and exchange system 7 can be in the form of one or a combination of a groove type, a tower type, a butterfly type and a linear Fresnel type.
And the circulating cooling water of the cooling tower 12 is sent to the condenser 10 by the circulating cooling water pump 11 to cool the exhaust gas of the low-pressure turbine generator set 9, and is sent to the cooling tower 12 again to be cooled, so that the cooling water circulation is completed. The cooling tower 12 can be replaced by an open water cooling system in areas where surface water sources are sufficient and allowed to be used, and an air cooling system in areas with water shortage or drought.
When solar radiation is sufficient and available in the daytime, the second valve 16 of the valve is kept closed, the first valve 15 and the third valve 17 are opened, the system realizes a complete high-pressure and low-pressure unit combined operation mode, and geothermal energy and solar energy are fully utilized to generate electricity.
When insufficient solar radiation occurs at night, cloudy days and the like, the second valve 16 is gradually opened, the first valve 15 and the third valve 17 are gradually closed, the system is stably transited to a low-voltage unit operation mode, geothermal energy is adopted for power generation, continuous and stable output of electric power and slow change of load are realized, and the influence of discontinuous or sudden change of load on a power grid is avoided.
This practicality utilizes solar energy and parallelly connected combined cycle power generation system of geothermal energy, will utilize solar energy power generation and geothermal energy electricity generation organic to combine together, has improved combined cycle power generation system's thermal efficiency.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. A geothermal photo-thermal composite continuous power generation system, comprising:
the system comprises a geothermal water circulating system, a photo-thermal heat collecting system, a power generation system and a condensing system;
the geothermal water circulating system is connected with the photo-thermal heat collection system through a pipeline, and the working medium provides energy through the geothermal water circulating system and/or the photo-thermal heat collection system and supplies the energy to the power generation system for power generation;
the power generation system is connected with the condensing system through a pipeline, and the condensing system condenses exhaust of the power generation system and then sends the exhaust into the geothermal water circulating system.
2. The geothermal photothermal composite continuous power generation system according to claim 1, wherein: the power generation system comprises a high-pressure turbine generator set, a first generator, a low-pressure turbine generator set and a second generator;
the photo-thermal heat collection system, the high-pressure turbine generator set and the first generator are sequentially connected through pipelines;
the geothermal water circulating system, the low-pressure turbine generator set and the second generator are sequentially connected through pipelines;
the high-pressure turbine generator set is connected with the low-pressure turbine generator set through a pipeline, and the low-pressure turbine generator set is connected with the condensing system through a pipeline.
3. The geothermal photothermal composite continuous power generation system according to claim 2, wherein:
the geothermal water circulating system comprises a submersible pump, a rotational flow desander, a geothermal heat exchanger, a geothermal tail water filter and a recharging pressure pump which are connected in sequence;
the geothermal heat exchanger is connected with the photo-thermal heat collection system through a pipeline;
the geothermal heat exchanger, the low-pressure turbine generator set and the second generator are sequentially connected through pipelines.
4. The geothermal photothermal composite continuous power generation system according to claim 3, wherein: the geothermal water circulating system also comprises a geothermal production well and a geothermal recharging well, the submersible pump is arranged in the geothermal production well, and the recharging pressure pump is arranged in the geothermal recharging well.
5. The geothermal photothermal composite continuous power generation system according to claim 4, wherein: the high-pressure turbine generator set is a back pressure turbine, and the low-pressure turbine generator set is an ORC turbine generator set.
6. The geothermal photothermal composite continuous power generation system according to claim 5, wherein: the system also includes a control system including a first valve, a second valve, a third valve; the first valve is arranged on a connecting pipeline between the geothermal heat exchanger and the photo-thermal heat collection system; the second valve is arranged on a connecting pipeline between the geothermal heat exchanger and the low-pressure turbine generator set; and the third valve is arranged on a connecting pipeline between the high-pressure turbine generator set and the low-pressure turbine generator set.
7. The geothermal photothermal composite continuous power generation system according to claim 6, wherein: the condensing system comprises a condenser and a working medium pump; the condenser is connected with the low-pressure turbine generator set through a pipeline; and the condenser condenses the exhaust gas of the power generation system and then sends the exhaust gas into the geothermal heat exchanger through the working medium pump.
8. The geothermal photothermal composite continuous power generation system according to claim 7, wherein: the system also comprises a cooling system, wherein the cooling system comprises a cooling tower and a cooling water pump; and the condenser is connected with the cooling tower pipeline through the cooling water pump.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102143A (en) * | 2020-01-16 | 2020-05-05 | 河北绿源地热能开发有限公司 | Geothermal photo-thermal combined type continuous power generation system |
| CN112594619A (en) * | 2020-12-14 | 2021-04-02 | 大连理工江苏研究院有限公司 | Underground tunnel geothermal energy auxiliary lighting system and method thereof |
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2020
- 2020-01-16 CN CN202020092732.9U patent/CN211777845U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102143A (en) * | 2020-01-16 | 2020-05-05 | 河北绿源地热能开发有限公司 | Geothermal photo-thermal combined type continuous power generation system |
| CN112594619A (en) * | 2020-12-14 | 2021-04-02 | 大连理工江苏研究院有限公司 | Underground tunnel geothermal energy auxiliary lighting system and method thereof |
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