Medium regulating and controlling device for medium-deep geothermal orifice
By designing a medium -deep geothermal port medium regulatory device including buffer tank and exhaust valve, the problem of being unable to discharge the gas in the oil sleeve in time in the existing technology, realize the effective return and return of the medium, improve the ground, improve the ground, and improve the ground. The efficiency of thermal energy mining.
Patent Information
- Application Number
- CN202421104049.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing medium and deep geothermal orifice medium return pipe system and medium return pipe system do not have a gas storage and exhaust device system, which leads to the failure to discharge the gas in the oil casing in time when the heated medium is injected for the first time, affecting the return and return of the medium. .
Design a medium -deep geothermal port medium regulatory device, including buffer tanks, exhaust valves, medium returning pipes in the flow pipes, air -liquid separators, seamless steel pipe welding flange and PE polyethylene Essence The device automatically discharges the gas accumulation of gas accumulation through the combination of the buffer tank and the exhaust valve to solve the problem of gas accumulation.
The gas in the oil sleeve in time is achieved when the media is injected for the first time to ensure the effective return and return of the medium, which improves the mining efficiency of geothermal energy and the safety of equipment.
Smart Images
Figure CN222417999U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of medium control auxiliary components for medium-deep geothermal orifice, and in particular relates to a medium control device for medium-deep geothermal orifice. Background Art
[0002] At present, a medium-deep geothermal hole refers to a heat extraction device used to utilize heat sources with a temperature greater than 80 degrees in underground rock formations with a depth of about 2000-3000 meters. When extracting heat from the geothermal hole, a well mouth medium control device needs to be set to control the medium.
[0003] Through the above analysis, the problems and defects of the prior art are as follows:
[0004] At present, the orifice medium return pipe system and the medium return pipe system are not equipped with a gas storage and exhaust device system. When the heated medium is injected for the first time, the internal gas of the entire oil casing and the insulation inner pipe cannot be discharged in time, causing gas accumulation in the entire oil casing system and affecting the return and reflux of the medium. Utility Model Content
[0005] In view of the problems existing in the prior art, the utility model provides a medium control device for a medium-deep geothermal orifice.
[0006] The utility model is implemented as follows: a medium control device for a medium at a medium-deep geothermal orifice, the device comprising a buffer tank, a gas exhaust valve connected to the top of the buffer tank, a medium reflux pipe flange connected to the middle of the buffer tank, a gas-liquid separator connected to the middle of the buffer tank, a seamless steel pipe welding flange connected just below the center of the gas-liquid separator, the seamless steel pipe welding flange connected to a PE polyethylene heated reflux inner pipe, the lower end of the buffer tank connected to an oil casing, an inner tube and outer tube annular space is provided inside the oil casing, an insulating inner tube is provided on one side of the inner tube and outer tube annular space, the control device also comprises an inner tube heat collection reflux device, a metal gravity heat extraction rod and a heat collection conical sealer.
[0007] Furthermore, the seamless steel pipe welding flange connects the buffer tank and the insulated inner pipe. The buffer tank is interconnected through the seamless steel pipe welding flange and the insulated inner pipe, and the heated medium at the bottom of the oil casing is output to the buffer tank. The medium outputs the heat to the external pipeline, and the external pipeline absorbs the temperature of the heated medium.
[0008] Furthermore, the buffer tank is connected to a medium return pipe flange, and the heated medium flows from the medium return pipe flange through the return pipe into the annular space of the insulation inner pipe and outer pipe.
[0009] Furthermore, the heated medium in the annular space of the inner tube and the outer tube circulates to the bottom of the inner tube heat collection and reflux device under pressure, and continues to absorb the heat transferred by the heat collection conical sealer, the metal gravity heating rod and the outer tube wall, and then is transported to the external pipeline by the inner tube heat collection and reflux device and the PE polyethylene heated reflux inner tube pipeline. In the process of the reflux medium flowing into the buffer tank, the buffer tank can buffer and reduce the pressure of the reflux medium to a certain extent through its own large volume, and at the same time, the compressed air in the buffer tank is discharged to the outside. When the circular head gas is exhausted, the exhaust valve will automatically close.
[0010] Furthermore, the inner tube heat collection and reflow device is arranged above the metal gravity heat extraction rod, and the metal gravity heat extraction rod is arranged above the heat collection conical sealer.
[0011] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the utility model are as follows:
[0012] First, the utility model provides a medium control device for medium-deep geothermal orifice. Specifically, when the reflux medium is injected for the first time, the medium in the annulus between the outer casing and the inner pipe is pushed by pressure to fill the annulus with liquid. At this time, the gas in the annulus is discharged, and the pressure in the pipe increases accordingly. The buffer tank accumulates the air squeezed out of the liquid medium in the annulus, and automatically opens the automatic exhaust valve on the buffer tank to discharge it to the outside, thereby solving the technical problem of being able to timely discharge the gas in the inner and outer pipes of the oil casing when the first reflux medium is injected.
[0013] The utility model can realize the function of discharging gas from the first injected medium, is beneficial to the stability of the efficiency of the reflux medium and the return medium, and realizes timely discharging of gas from the inner and outer surfaces of the petroleum casing.
[0014] Second, the technical problems of the prior art solved by the utility model are mainly reflected in the following aspects:
[0015] First, the medium control in the geothermal exploitation process in the prior art is not perfect, and there are often problems such as large heat loss and poor medium circulation. These problems not only affect the efficiency of geothermal energy exploitation, but may also cause equipment damage and safety hazards. The utility model aims to solve these problems by designing a medium control device for a medium-deep geothermal orifice, and realize effective circulation of the medium and efficient transfer of heat.
[0016] Secondly, traditional geothermal mining equipment is often complex in structure, cumbersome to operate, and inconvenient to install and maintain. The utility model simplifies the structure and optimizes the layout to make the device more compact, easy to install and operate. At the same time, the utility model also adopts a modular design, which is convenient for customization and expansion according to specific needs.
[0017] In addition, the utilization of geothermal energy in the existing technology often has problems such as low energy utilization efficiency and serious environmental pollution. The utility model reduces heat loss and improves energy utilization efficiency by adopting efficient thermal insulation materials and heat conduction technology. At the same time, by optimizing the medium circulation path and control strategy, the impact on the environment is reduced, and green and sustainable geothermal mining is achieved.
[0018] Through the implementation of this utility model, significant technical progress has been achieved:
[0019] 1. Improved geothermal energy extraction efficiency: By optimizing the medium circulation path and heat transfer method, the utility model achieves efficient medium circulation and rapid heat transfer, thereby improving geothermal energy extraction efficiency.
[0020] 2. Reduced energy loss: The use of advanced insulation materials and heat conduction technology effectively reduces the loss of heat during the transfer process and improves energy utilization efficiency.
[0021] 3. Simplified equipment structure: By simplifying the structure and optimizing the layout, the device is made more compact, easier to install and operate, and the maintenance cost is reduced.
[0022] 4. Improved environmental friendliness: By optimizing medium circulation and regulation strategies, the impact on the environment is reduced, and green and sustainable geothermal exploitation is achieved.
[0023] In summary, the utility model achieves significant technological progress by solving the problems existing in the prior art and provides a more efficient and environmentally friendly solution for the exploitation and utilization of geothermal energy.
[0024] Third, the technical solution of this utility model fills the technical gap in the industry at home and abroad:
[0025] The utility model discloses a medium control device for a medium-deep geothermal orifice, which fills the technical gap in the field of medium control technology for medium-deep geothermal air, and uses reflux medium to collect and accumulate the entire oil inner and outer casing gas into a buffer tank and discharge it in time.
[0026] The technical solution of the utility model overcomes technical prejudice: the utility model provides a medium-deep geothermal hole heat-collecting conical sealer device, which is installed at the bottom of the oil casing, and solves the problems and risks existing in the existing geothermal technology; for example: when hot water from geothermal wells is used to extract heat, the underground pressurized water pressure will be destroyed, and the extraction of geothermal water will cause ground subsidence, thereby affecting the safety of linear engineering, and the discharge of tail water may pollute the geological environment. The present invention overcomes the difficulties of the above geothermal well water heat extraction technology, and solves the risks of polluting the geological environment, and solves the desire of people to "extract heat without taking water". The final successful realization also fills the technical gap in the geothermal heat extraction industry at a depth of 2000 meters to 3000 meters underground at home and abroad. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a general structural diagram between the buffer tank and the oil casing provided by the embodiment of the utility model;
[0028] Figure 2 It is a general structural diagram between the internal heat collection and reflow device and the heat collection conical sealer provided in the embodiment of the utility model;
[0029] In the figure: 1. Exhaust valve; 2. Buffer tank; 3. Medium return pipe flange; 4. Gas-liquid separator; 5. Medium return pipe flange; 6. Seamless steel pipe welding flange; 7. PE polyethylene heated return inner pipe; 8. Oil casing; 9. Inner pipe heat collection return device; 10. Heat collection cone sealer; 11. Metal gravity heating rod; 12. Annular space between inner and outer pipes; 13. Insulated inner pipe. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0031] As attached Figure 1-2 As shown, a medium control device for a medium at a medium-deep geothermal orifice comprises a buffer tank 2, wherein an exhaust valve 1 is connected to the top position of the buffer tank 2, a medium return pipe flange 3 is connected to the middle position of the buffer tank 2, a gas-liquid separator 4 is connected to the middle position of the buffer tank 2, a seamless steel pipe welding flange 6 is connected directly below the center of the gas-liquid separator 4, the seamless steel pipe welding flange 6 is connected to a PE polyethylene heated return inner pipe 7, the lower end of the buffer tank 2 is connected to an oil casing 8, an inner tube and outer tube annular space 12 is provided inside the oil casing 8, an insulating inner tube 13 is provided on one side of the inner tube and outer tube annular space 12, and the control device also comprises an inner tube heat collection return device 9, a metal gravity heat extraction rod 11 and a heat collection conical sealer 10.
[0032] The seamless steel pipe welding flange 6 connects the buffer tank 2 and the insulated inner tube 13. The buffer tank 2 is interconnected through the seamless steel pipe welding flange 6 and the insulated inner tube 13, and the heated medium at the bottom of the oil casing is output to the buffer tank. The medium outputs the heat to the external pipeline, and the external pipeline absorbs the temperature of the heated medium.
[0033] The buffer tank 2 is connected with a medium return pipe flange 5 , and the heated medium flows from the medium return pipe flange 5 through the return pipe into the annular space 12 of the outer pipe of the heat-insulating inner pipe 13 .
[0034] The heated medium in the annular space 12 of the inner and outer tubes circulates to the bottom of the inner tube heat collection and reflux device 9 under pressure, and continues to absorb the heat transferred by the heat collection conical sealer 10, the metal gravity heating rod 11 and the outer tube wall, and then is transported to the external pipeline by the inner tube heat collection and reflux device 9 and the PE polyethylene heated reflux inner tube 7 pipeline. In the process of the reflux medium flowing into the buffer tank 2, the buffer tank 2 can use its large volume to buffer and reduce the pressure of the reflux medium to a certain extent, and at the same time, the compressed air in the buffer tank 2 is discharged to the outside. When the circular head gas is exhausted, the exhaust valve 1 will automatically close.
[0035] The inner tube heat collection and reversing device 9 is arranged above the metal gravity heat extraction rod 11 , and the metal gravity heat extraction rod 11 is arranged above the heat collection conical sealer 10 .
[0036] Working principle: During operation, the utility model separates the medium return fluid from the medium reflux fluid through the gas-liquid partition plate 4 arranged in the middle of the buffer tank, and the two cannot communicate with each other. Through the seamless steel pipe welding flange 6, this pipe connects the buffer tank 2 and the heat-insulating inner pipe 13. This function is to output the heated medium from the bottom of the oil casing to the buffer tank 2, and the medium outputs the heat to the external pipeline. After the external pipeline absorbs the temperature of the heated medium, it flows into the annular space 12 of the outer pipe of the heat-insulating inner pipe through the return pipe from the flange port 5 of the medium return pipe, and circulates to the bottom of the inner pipe heat collection and reflux device 9 under pressure to continue to absorb the heat transferred by the heat collection conical sealer 10 and the metal gravity heating rod and the outer casing wall. Then, it is transported to the external pipeline by the inner pipe heat collection and reflux device and the PE polyethylene inner pipe 7 pipeline. In the process of the reflux medium flowing into the buffer tank 2, the buffer tank 2 can buffer and weaken the pressure of the reflux medium to a certain extent through its own large volume. At the same time, the compressed air in the buffer tank 2 is discharged to the outside. When the circular head gas is exhausted, the exhaust valve 1 will automatically close. In this way, the workflow of discharging gas by injecting the medium for the first time is realized.
[0037] The specific application embodiment provided by the utility model is as follows: the heated medium at the bottom of the petroleum casing is output to the buffer tank, and the medium outputs the heat to the external pipeline. After the external pipeline absorbs the temperature of the heated medium, the medium returns to the annular space of the heat-insulating inner and outer pipes through the return pipe from the flange of the medium return pipe, and circulates to the bottom of the inner pipe heat collection and reflux device under pressure to continue to absorb the heat transferred by the heat collection conical sealer, the metal gravity heating rod and the outer casing wall, and then is transported to the external pipeline by the inner pipe heat collection and reflux device and the PE polyethylene heated reflux inner pipe. In the process of the reflux medium flowing into the buffer tank, the buffer tank can buffer and reduce the pressure of the reflux medium to a certain extent through its own large volume, and at the same time, the compressed air in the buffer tank is discharged to the outside. When the circular head gas is exhausted, the exhaust valve will automatically close.
[0038] The following are two specific embodiments of the medium-deep geothermal orifice medium control device:
[0039] Embodiment 1
[0040] In an actual geothermal mining project, a medium-deep geothermal orifice medium control device was used. First, a buffer tank was installed, and an exhaust valve was installed on its top to ensure that the gas can be discharged smoothly during operation. The medium return pipe flange was connected to the middle position of the buffer tank so that the medium can return smoothly. At the same time, a gas-liquid separator was installed in the buffer tank to achieve effective separation of gas and liquid.
[0041] Just below the gas-liquid separator, a seamless steel pipe welding flange is connected, and through it, a PE polyethylene heated return inner pipe is connected. In this way, the heated medium can flow smoothly into the buffer tank through the return inner pipe. In addition, the lower end of the buffer tank is connected to the oil casing, which has an inner and outer pipe annular space inside. A heat-insulating inner pipe is installed on one side of the space to reduce heat loss.
[0042] In actual operation, the device was started and it was observed that the heated medium was output from the bottom of the oil casing to the buffer tank through the seamless steel pipe welding flange and the heat-insulating inner pipe. The medium outputs heat to the external pipeline in the buffer tank, which absorbs and takes away the temperature of the heated medium. Subsequently, the cooled medium flows again into the annular space of the heat-insulating inner pipe and outer pipe through the medium return pipe flange and the return pipe, realizing the recycling of the medium.
[0043] Embodiment 2
[0044] In another geothermal project, the medium-deep geothermal orifice medium control device was customized for installation and adjustment according to the specific geological conditions and mining requirements. First, the installation position and height of the buffer tank were determined according to the actual situation on site, and the corresponding exhaust valve and medium return pipe flange were installed.
[0045] Then, according to the depth and temperature distribution of the geological heat reservoir, the appropriate length of the insulated inner pipe and seamless steel pipe welding flange were selected. During the installation process, special attention was paid to the sealing of the insulated inner pipe to ensure that heat would not be lost through the pipe wall.
[0046] After the device was installed, it was tested and run. By observing and recording data, it was found that the heated medium could smoothly pass through the seamless steel pipe welding flange and the insulated inner pipe into the buffer tank and effectively transfer the heat to the external pipe. At the same time, the cooled medium could also smoothly return to the annular space of the insulated inner pipe and outer pipe through the medium return pipe flange and the return pipe, realizing the continuous circulation of the medium.
[0047] Through these two embodiments, it can be seen that the medium control device for the medium-deep geothermal orifice has good effect and reliability in practical application, can effectively control the medium flow and heat transfer in the geothermal exploitation process, and improve the exploitation efficiency and utilization benefit of geothermal energy.
[0048] The utility model provides a medium control device for medium in deep geothermal orifice, which belongs to the technical field of medium control auxiliary components for medium in deep geothermal orifice. Specifically, when the reflux medium is injected for the first time, the medium in the annulus between the outer casing and the inner pipe fills the annulus with liquid under the pressure. At this time, the gas in the annulus is discharged, and the pressure in the pipe increases accordingly. The buffer tank accumulates the air squeezed out of the liquid medium in the annulus, and automatically opens the automatic exhaust valve on the buffer tank to discharge it to the outside, thereby solving the technical problem of being able to discharge the gas in the inner and outer pipes of the oil casing in time when the first reflux medium is injected.
[0049] The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the prior art. The following content is described in conjunction with data, charts, etc. of the test process.
[0050] The typical operating performance analysis of the embodiment is shown in the figure:
[0051] 1. Actual test results of thermal measurement operation
[0052] Numeric Total outlet water temperature of heat extraction side (℃) 40.7℃ Total outflow and return water temperature on the heat extraction side (℃) 23.1℃ <![CDATA[Total flow rate on the heat extraction side (m 3 / h)]]> 33.9 Heat extraction capacity of single hole on the heat extraction side (KW) 696.8 Heat extraction per meter of heat extraction hole (W / M) 248.9
[0053] 2. User-side working condition measurement results
[0054] Numeric User side water temperature (℃) 41 User side return water temperature (℃) 35.7 <![CDATA[Circulation water volume on the user side (m 3 / h)]]> 13.9 Total heat on user side (kw) 814 Actual heating area (㎡) 15000 Heat supplied by users per unit area (w / ㎡) 54
[0055] 3. Actual test results of energy consumption and energy efficiency of working system
[0056] Numeric Heating unit power (KW) 116.4 User side water pump power (KW) 13 Heat source side water pump power (KW) 12.7 Heating unit COP 6.9 User side water pump delivery coefficient WTF1 62.4 Take the water pump delivery coefficient WTFs on the heat source side 54.7 Heat source energy efficiency COPns 6.3 System Energy Efficiency COPsys 5.7
[0057] Through the measured results in the above three tables, we can see that this technology has the characteristics of high temperature on the heat source side, large heat extraction, and high system operating performance. It can reduce operating costs, reduce heating energy consumption, and further improve economic benefits. It has better application prospects for promoting building energy conservation and efficient and clean heating.
[0058] The above description is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.
Claims
1. A medium-deep geothermal orifice medium control device, characterized in that: This device includes a buffer tank, the top of which is connected to an exhaust valve, the middle of which is connected to a medium reflux pipe flange, the middle of which is connected to a gas-liquid separator, a seamless steel pipe welding flange is connected directly below the center of the gas-liquid separator, the seamless steel pipe welding flange is connected to a PE polyethylene heated reflux inner pipe, the lower end of the buffer tank is connected to an oil casing, the inside of the oil casing has an inner tube and outer tube annular space, an insulating inner tube is provided on one side of the inner tube and outer tube annular space, and the medium control device for the medium-deep geothermal orifice also includes an inner tube heat collection reflux device, a metal gravity heat extraction rod and a heat collection conical sealer.
2. The medium-deep geothermal orifice medium control device according to claim 1, characterized in that: The seamless steel pipe welding flange connects the buffer tank and the insulated inner pipe. The buffer tank is interconnected through the seamless steel pipe welding flange and the insulated inner pipe, and the heated medium at the bottom of the oil casing is output to the buffer tank. The medium outputs the heat to the external pipeline, and the external pipeline absorbs the temperature of the heated medium.
3. The medium-deep geothermal orifice medium control device according to claim 2, characterized in that: The buffer tank is connected with a medium return pipe flange, and the heated medium flows from the medium return pipe flange through the return pipe into the annular space of the heat-insulating inner and outer pipes.
4. The medium-deep geothermal orifice medium control device according to claim 1, characterized in that: The heated medium in the annular space of the inner tube and the outer tube circulates to the bottom of the inner tube heat collection and reflux device under pressure, and continues to absorb the heat transferred by the heat collection conical sealer, the metal gravity heating rod and the outer tube wall, and then is transported to the external pipeline by the inner tube heat collection and reflux device and the PE polyethylene heated reflux inner tube pipeline. In the process of the reflux medium flowing into the buffer tank, the buffer tank can buffer and reduce the pressure of the reflux medium to a certain extent through its own large volume, and at the same time, the compressed air in the buffer tank is discharged to the outside. When the circular head gas is exhausted, the exhaust valve will automatically close.
5. The medium-deep geothermal orifice medium control device according to claim 1, characterized in that: The inner tube heat collection and reflow device is arranged above the metal gravity heat extraction rod, and the metal gravity heat extraction rod is arranged above the heat collection conical sealer.