Method and device for enhancing geothermal power generation by coupling wind, light and abandoned electricity with electric boiler
By using wind and light abandoned electric boiler to generate steam and geothermal fluid for heat exchange and power generation, the problem of geothermal power generation being affected by resource attenuation and flow fluctuations is solved, and the power generation is increased and the system stability is enhanced.
Patent Information
- Application Number
- CN202411797071.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-02-21
AI Technical Summary
Geothermal power generation is affected by resource attenuation, flow fluctuations and cold source temperature changes, resulting in limited power generation. The volatility and intermittent nature of wind and light power waste have huge pressure on peak shaving and absorption of power grids, and there is a lack of effective solutions.
The electric boiler is driven through the wind and light depreciation, the water is heated into steam, and the steam and hot water generated by the geothermal fluid enter the geothermal power generation module for heat exchange and power generation, and the steam storage tank is used to store excess steam to cope with the fluctuations in the wind and light depreciation.
While saving wind and light power waste, the power generation of geothermal power generation system is increased, the stability of geothermal power generation system is enhanced, and the problem of geothermal power generation is effectively solved.
Smart Images
Figure CN119492035A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of electric power engineering, and in particular to a method and device for enhancing geothermal power generation by coupling wind and solar power abandonment with an electric boiler. Background Art
[0002] Large-scale access to the power grid by wind power and photovoltaic power, while optimizing the power supply structure, has resulted in huge pressure on the peak load regulation and absorption of the power grid due to its volatility and intermittent defects, and serious wind and solar power abandonment. Geothermal power generation is stable and has a high number of hours of utilization. It can support the basic load of the power grid and enhance the stability of the power grid by benchmarking thermal power. However, its power generation is affected by factors such as resource attenuation fluctuations and cold source temperature changes. It is difficult to reach full power generation, which greatly affects the power generation and thus the economic benefits of the power station. There is currently no implemented solution to the problem that geothermal power stations cannot generate full power due to resource attenuation, flow fluctuations and cold source temperature changes. Summary of the invention
[0003] In order to overcome the problem that geothermal power generation is limited by resource attenuation, flow fluctuations and cold source temperature changes, the present invention provides a method and device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers.
[0004] The technical solution adopted by the present invention to solve its technical problem is:
[0005] A method of coupling wind and solar power curtailment with electric boilers to enhance geothermal power generation. When there is wind and solar power curtailment, the wind and solar power curtailment is used to drive the electric boiler to heat water into steam. The steam, together with the steam and hot water generated by the geothermal fluid, enter the geothermal power generation module for heat exchange and power generation.
[0006] In this application, while saving a large amount of wind and solar power abandonment, the power generation of the geothermal power generation system is increased and the stability of the geothermal power generation system is enhanced.
[0007] In some embodiments, when there is wind and solar power curtailment, the curtailed wind and solar power is used to drive the electric boiler to heat water into steam. A portion of the steam enters the geothermal power generation module together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation, and the excess steam is stored in a steam storage tank. When the wind and solar power curtailment is insufficient, the electric boiler stops working, and the steam in the steam storage tank enters the geothermal power generation module together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation.
[0008] In some embodiments, steam from the electric boiler passes through the geothermal power generation module and is converted into condensed water and then transported back to the electric boiler for circulation.
[0009] The present invention also provides a device for enhancing geothermal power generation by coupling wind and solar power abandonment with an electric boiler, comprising a geothermal power generation module, a production well and a reinjection well, wherein both the production well and the reinjection well are connected to the geothermal power generation module, and further comprising an electric boiler for receiving wind and solar power abandonment and generating steam, wherein the steam generated by the electric boiler is connected to the geothermal power generation module through a pipeline.
[0010] In some embodiments, a steam storage tank is also included. The steam generated by the electric boiler can enter the steam storage tank through a pipeline, and the steam in the steam storage tank can enter the geothermal power generation module through the pipeline.
[0011] In some embodiments, a first outflow channel is included, which connects the geothermal power generation module and the electric boiler and is used to recover steam from the electric boiler after it becomes condensed water in the geothermal power generation module.
[0012] In some embodiments, a steam-water separator is provided between the production well and the geothermal power generation module, and the steam output by the steam-water separator enters the geothermal power generation module through the first inflow channel; the hot water output by the steam-water separator enters the geothermal power generation module through the second inflow channel.
[0013] In some embodiments, steam from the electric boiler, steam from the steam-water separator, and hot water from the steam-water separator circulate in the geothermal power generation module through separate pipelines.
[0014] In some embodiments, the steam from the steam-water separator is converted into condensed water in the geothermal power generation module and then reinjected into the reinjection well through the second outflow channel, and the hot water from the steam-water separator is also reinjected into the reinjection well through the second outflow channel after passing through the geothermal power generation module.
[0015] The beneficial effects of the present invention are:
[0016] While saving a large amount of wind and solar power curtailment, it increases the power generation of the geothermal power generation system and enhances the stability of the geothermal power generation system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of the device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers provided by the present invention.
[0018] Markings in the figure are: 1-production well, 2-steam-water separator, 3-first inflow channel, 4-second inflow channel, 5-third inflow channel, 6-geothermal power generation module, 7-first outflow channel, 8-second outflow channel, 9-return pump, 10-reinjection pump, 11-reinjection well, 12-steam storage tank, 13-electric boiler. DETAILED DESCRIPTION
[0019] The present invention is further described below in conjunction with the accompanying drawings.
[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0021] Professional term explanation
[0022] ⑴ Geothermal power generation: a power generation method that converts the heat energy carried by geothermal fluid into electrical energy.
[0023] ⑵ Wind and solar power curtailment: Wind and solar power curtailment refers to the phenomenon that during the process of wind and solar power generation, the generated electricity cannot be effectively utilized or is forced to be shut down due to insufficient grid acceptance capacity or electricity demand being lower than power generation.
[0024] ⑶ Thermal storage electric boiler 13: It is a device that uses electrical energy to heat water or other media, stores thermal energy and releases heat when needed.
[0025] (4) Geothermal power generation module 6: A complete set of mechanical equipment consisting of turbines, generators and other equipment that converts the thermal energy carried by geothermal fluid into electrical energy.
[0026] ⑸Geothermal fluid: includes geothermal water, geothermal steam and associated non-condensable gases.
[0027] (6) Production well 1: A geothermal well that can stably produce steam, hot water or a steam-water mixture from a geothermal reservoir.
[0028] ⑺ Steam-water separator 2: A device for separating steam and hot water in geothermal fluid.
[0029] ⑻Recharge pump 10: A circulation pump used to pressurize the geothermal fluid after heat exchange in the power generation module.
[0030] (9) Return water pump 9: A circulating water pump used to pressurize the condensed water after the steam produced by the thermal storage electric boiler 13 exchanges heat with the geothermal power generation module 6.
[0031] ⑽Regulating shut-off valve: A valve used to control the flow of fluid (such as liquid or gas). Its main function is to regulate flow and pressure, and at the same time it can completely close the fluid channel when necessary.
[0032] Combination Figure 1 As shown, the present invention provides a method and device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers.
[0033] A method for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers. When there is wind and solar power abandonment, the wind and solar power abandonment is used to drive the electric boiler 13 to heat water into steam. The steam, together with the steam and hot water generated by the geothermal fluid, enter the geothermal power generation module 6 for heat exchange and power generation.
[0034] In this application, while saving a large amount of wind and solar power abandonment, the power generation of the geothermal power generation system is increased and the stability of the geothermal power generation system is enhanced.
[0035] In this embodiment, when there is wind and solar power curtailment, the wind and solar power curtailment is used to drive the electric boiler 13 to heat water into steam. A portion of the steam enters the geothermal power generation module 6 together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation, and the excess steam is stored in the steam storage tank 12; when the wind and solar power curtailment is insufficient, the electric boiler 13 stops working, and the steam in the steam storage tank 12 enters the geothermal power generation module 6 together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation.
[0036] By providing the steam storage tank 12, the stability of geothermal power generation is further improved.
[0037] In this embodiment, the steam from the electric boiler 13 is converted into condensed water after passing through the geothermal power generation module 6 and is transported back to the electric boiler 13 for circulation.
[0038] The device for enhancing geothermal power generation by coupling abandoned power with an electric boiler 13 comprises a geothermal power generation module 6, a production well 1 and a reinjection well 11, both of which are connected to the geothermal power generation module 6, and an electric boiler 13 for receiving abandoned wind and solar power to generate steam, and the steam generated by the electric boiler 13 is connected to the geothermal power generation module 6 through a pipeline. In this embodiment, the electric boiler 13 is a heat storage electric boiler 13.
[0039] In this embodiment, a steam storage tank 12 is also included. The steam generated by the electric boiler 13 can enter the steam storage tank 12 through a pipeline, and the steam in the steam storage tank 12 can enter the geothermal power generation module 6 through the pipeline.
[0040] In this embodiment, the steam from the electric boiler 13 directly to the geothermal power generation module 6 and the steam from the steam storage tank 12 to the geothermal power generation module 6 both enter the geothermal power generation module 6 through the third inflow channel 5. Figure 1 As shown, in this embodiment, a plurality of regulating shut-off valves are provided to realize the connection and shut-off, as well as the flow control among the electric boiler 13, the steam storage tank 12 and the geothermal power generation module 6.
[0041] In this embodiment, a first outflow channel 7 is included, which connects the geothermal power generation module 6 and the electric boiler 13 and is used to recover the steam from the electric boiler 13 after it is converted into condensed water in the geothermal power generation module 6. A return pump 9 is provided on the first outflow channel 7.
[0042] In this embodiment, a steam-water separator 2 is provided between the production well 1 and the geothermal power generation module 6, and the steam output by the steam-water separator 2 enters the geothermal power generation module 6 through the first inflow channel 3; the hot water output by the steam-water separator 2 enters the geothermal power generation module 6 through the second inflow channel 4.
[0043] In this embodiment, the steam from the electric boiler 13 , the steam from the steam-water separator 2 , and the hot water from the steam-water separator 2 circulate in the geothermal power generation module 6 through independent pipelines.
[0044] In this embodiment, the steam from the steam-water separator 2 is converted into condensed water in the geothermal power generation module 6 and then re-injected into the re-injection well 11 through the second outflow channel 8. The hot water from the steam-water separator 2 is also re-injected into the re-injection well 11 through the second outflow channel 8 after passing through the geothermal power generation module 6. A re-injection pump 10 is provided on the second outflow channel 8.
[0045] The device operation mode:
[0046] The geothermal fluid is transported from the geothermal production well 1 to the wellhead steam-water separator 2, separated into hot water and steam, which are respectively sent to the geothermal power generation module 6 for heat exchange, driving the geothermal power generation module 6 to generate electricity. After the heat exchange, the geothermal hot water and condensate are pressurized and recharged to the recharge well 11 through the recharge pump 10, completing a cycle.
[0047] When there is wind and solar power abandonment, the abandoned wind and solar power is used to drive the electric boiler 13 to heat water into steam. A part of it enters the geothermal power generation module 6 together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation, and the excess is stored in the steam storage tank 12; when the wind and solar power abandonment is insufficient, the electric boiler 13 stops working and transports the steam in the steam storage tank 12 into the geothermal power generation module 6 for heat exchange and power generation. After the heat exchange is completed, the steam becomes condensed water and is transported to the electric boiler 13 through the return pump 9 for the next cycle.
[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers, characterized in that: When there is wind and solar power abandonment, the abandoned wind and solar power is used to drive the electric boiler (13) to heat water into steam, and the steam, steam generated by geothermal fluid and hot water enter the geothermal power generation module (6) together for heat exchange and power generation.
2. The method for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 1 is characterized in that: When there is wind and solar power abandonment, the abandoned wind and solar power is used to drive the electric boiler (13) to heat water into steam. A portion of the steam enters the geothermal power generation module (6) together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation, and the excess steam is stored in the steam storage tank (12); When the wind and solar power curtailment is insufficient, the electric boiler (13) stops working, and the steam in the steam storage tank (12) is fed into the geothermal power generation module (6) together with the steam and hot water generated by the geothermal fluid for heat exchange and power generation.
3. The method for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 1 or 2, characterized in that: The steam from the electric boiler (13) passes through the geothermal power generation module (6) and is converted into condensed water, which is then transported back to the electric boiler (13) for circulation.
4. A device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boilers, comprising a geothermal power generation module (6), a production well (1) and a reinjection well (11), wherein the production well (1) and the reinjection well (11) are both connected to the geothermal power generation module (6), and characterized in that: It also comprises an electric boiler (13) for receiving abandoned wind and solar power to generate steam. The steam generated by the electric boiler (13) is connected to the geothermal power generation module (6) through a pipeline.
5. The device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 4 is characterized in that: It also comprises a steam storage tank (12), the steam generated by the electric boiler (13) can enter the steam storage tank (12) through a pipeline, and the steam in the steam storage tank (12) can enter the geothermal power generation module (6) through the pipeline.
6. The device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 4 is characterized in that: It comprises a first outflow channel (7), which connects the geothermal power generation module (6) and the electric boiler (13) and is used for recovering steam from the electric boiler (13) after it is converted into condensed water in the geothermal power generation module (6).
7. The device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to any one of claims 4 to 6, characterized in that: A steam-water separator (2) is provided between the production well (1) and the geothermal power generation module (6); the steam output by the steam-water separator (2) enters the geothermal power generation module (6) through a first inflow channel (3); and the hot water output by the steam-water separator (2) enters the geothermal power generation module (6) through a second inflow channel (4).
8. The device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 7 is characterized in that: Steam from the electric boiler (13), steam from the steam-water separator (2), and hot water from the steam-water separator (2) circulate in the geothermal power generation module (6) through independent pipelines.
9. The device for enhancing geothermal power generation by coupling wind and solar power abandonment with electric boiler according to claim 7 is characterized in that: Steam from the steam-water separator (2) is converted into condensed water in the geothermal power generation module (6) and then reinjected into the reinjection well (11) through the second outflow channel (8); hot water from the steam-water separator (2) is also reinjected into the reinjection well (11) through the second outflow channel (8) after passing through the geothermal power generation module (6).