Energy recycling method in nitrogen dissolution-preventing and water dissolution cavity-making process

Abstract

The invention relates to the technical field of energy recovery and utilization, in particular to an energy recovery and utilization method in a nitrogen dissolution preventing and water dissolution cavity making process. A power generation device comprises a base, a first power generator and a water pipe; the outer side wall of the water pipe is fixedly connected to the top end of the outer wall of the base through a pair of first square plates; a square shell is fixedly connected to the top end of the outer side wall of the water pipe and communicates with the water pipe. A water pipe is connected with a brine discharging channel, brine flows into the water pipe and impacts a group of rotating plates when flowing in the water pipe, so that the group of rotating plates rotate, the rotating plates rotate to drive a rotating shaft to rotate, the rotating shaft rotates to drive a rotor of a first power generator to rotate so as to generate power, and potential energy of the brine is converted into electric energy; and the brine finally flows into the heat energy recovery device for geothermal energy recovery, so that the device not only recycles the geothermal energy of the brine, but also recycles the potential energy of brine flowing, thereby further reducing the consumption and waste of energy.

Description

Technical Field

[0001] The invention relates to the technical field of energy recovery and utilization, and in particular to a method for recovering and utilizing energy in a nitrogen-resistance-dissolving and water-dissolving cavity-making process. Background Art

[0002] In underground salt mining, nitrogen-resistance water-soluble cavity-making technology is mostly used. This technology is to inject nitrogen into the cavity to form a nitrogen isolation layer on the top of the cavity. Since nitrogen is insoluble in water and does not react with salt rock, and its density is lighter than water, it can effectively prevent fresh water from directly contacting salt rock and protect the cavity roof from excessive dissolution. In addition, nitrogen-resistance water-soluble cavity-making technology does not use harmful chemicals, and has the advantages of low cost of nitrogen and ensuring the stability and sealing of the cavity shape, so it is widely used in underground salt mining.

[0003] In the prior art, although the geothermal energy in the brine in the underground salt mine is recovered and utilized to generate electricity during underground salt mining, the potential energy generated by the flow of the brine is not well utilized, so that the potential energy generated by the flow of the brine is wasted, resulting in a waste of energy and an increase in the cost of energy consumption. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that during underground salt mining, although the geothermal energy in the brine in the underground salt mine is recovered and utilized to generate electricity, the potential energy generated by the flow of the brine is not well utilized, so that the potential energy generated by the flow of the brine is wasted, thereby causing a waste of energy and increasing the cost of energy consumption. A method for recovering and utilizing energy in a nitrogen-resisting water-soluble cavity making process is proposed.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A method for energy recovery and utilization in a nitrogen-resistance-water-solution cavity-making process, the method comprising the following steps: Step 1: Select a certain volume of underground salt mine; Step 2: In the early stage of underground salt mining, nitrogen is injected to form a nitrogen isolation layer at the top of the cavity to prevent rapid dissolution and thus expand the lower cavity; Step 3: Establish a connecting channel between the ground and underground storage spaces, including a water injection channel and a brine discharge channel; Step 4: Close the valve in the brine discharge channel at night, and then use a high-pressure pump to inject water into the water injection channel. During the water injection process, the water injection pressure gradually increases to 6-7Mpa. During the continuous water injection and cavity creation process, the nitrogen that is resistant to dissolution will be compressed and store energy; Step 5: During the day, open the valve in the brine discharge channel to discharge the brine. At the same time, the high-pressure pump continues to inject water. When the brine is discharged under the action of pressure, the potential energy of the brine flow will be converted into electrical energy through the power generation device; Step 6: When the high-pressure pump is injecting water, electricity is transmitted to the high-pressure pump through the power generation device to keep the water injection pressure at 6-7Mpa; Step 7: When the brine is discharged through the brine discharge channel, the temperature of the brine is 50-60°C. After the brine passes through the power generation device to generate electricity, it enters the heat recovery device, so that the heat recovery device recovers and reuses the geothermal energy in the brine.

[0006] As a preferred embodiment of the present invention, the power generation device includes a base, a first generator and a water pipe; the outer wall of the water pipe is fixedly connected to the top end of the outer wall of the base through a pair of first square plates; a square shell is fixedly connected to the top end of the outer wall of the water pipe, and the square shell is connected to the water pipe; the bottom end of the outer wall of the heat recovery device is fixedly connected to the top end of the outer wall of the base, and one end of the outer wall of the water pipe is connected to the heat recovery device; the bottom end of the outer wall of the first generator is fixedly connected to the top end of the outer wall of the base; a rotating shaft is provided at the output end of the first generator, and one end of the outer wall of the rotating shaft passes through one side of the outer wall of the square shell and is located in the square shell; a group of rotating plates are fixedly connected to the outer wall of one end of the rotating shaft located in the square shell, and a group of rotating plates are respectively located in the square shell and the water pipe.

[0007] As a preferred embodiment of the present invention, a second generator is provided at the top of the outer wall of the base; a first rotating shaft is provided at the output end of the second generator; a first bevel gear is fixedly connected to the outer side wall of one end of the rotating shaft located outside the square shell; a second bevel gear is fixedly connected to one end of the outer wall of the first rotating shaft, and the first bevel gear and the second bevel gear are meshed with each other, and the radius of the first bevel gear is greater than the radius of the second bevel gear.

[0008] As a preferred embodiment of the present invention, the rotating plate includes a square plate and a buffer shell; one end of the outer wall of the square plate is fixedly connected to the outer wall of the rotating shaft; a sliding groove is provided on one side of the outer wall of the square plate; the inner wall of the buffer shell is slidably connected to the outer wall of the square plate, and one side of the outer wall of the buffer shell is slidably connected to one side of the inner wall of the sliding groove, and a sealed space is formed between the buffer shell and the square plate; a pair of first springs are fixedly connected to one side of the outer wall of the square plate, and one end of the outer wall of the pair of first springs is fixedly connected to one side of the inner wall of the buffer shell, and the first springs are located in the sealed space.

[0009] As a preferred embodiment of the present invention, the bottom end of the outer wall of the second generator is slidably connected to the top end of the outer wall of the base; a pair of limit grooves are provided at the top end of the outer wall of the base; a bolt is threadedly connected to the top end of the outer wall of the bottom plate of the second generator, and the bottom end of the outer wall of the bolt passes through the bottom plate of the second generator, and the bolt is threadedly connected to the bottom plate of the second generator; the bolt matches a pair of limit grooves.

[0010] As a preferred embodiment of the present invention, a third bevel gear is fixedly connected to the outer wall of one end of the rotating shaft located in the square shell; the inner wall of the water pipe is rotatably connected to a rotating rod through a first block; a fourth bevel gear is fixedly connected to one end of the outer wall of the rotating rod, and the fourth bevel gear and the third bevel gear are meshed with each other; an annular cleaning plate is rotatably connected to the inner wall of the water pipe; a group of cleaning rods are provided on one side of the outer wall of the annular cleaning plate; a first annular rack is fixedly connected to the other side of the outer wall of the annular cleaning plate, and the first annular rack is rotatably connected to the inner wall of the water pipe; a fifth gear is fixedly connected to the other end of the outer wall of the rotating rod, and the fifth gear and the first annular rack are meshed with each other.

[0011] As a preferred embodiment of the present invention, one end of the outer wall of the cleaning rod is rotatably connected to one side of the outer wall of the annular cleaning plate; an annular groove is provided on the outer wall of the cleaning rod; a sixth gear is fixedly connected to the inner wall of the annular groove; a second annular rack is fixedly connected to the inner wall of the water pipe, and the second annular rack is meshed with a group of sixth gears.

[0012] As a preferred embodiment of the present invention, the rotating rod includes a circular shell and a circular rod; the outer side wall of the circular rod is slidably connected to the inner side wall of the circular shell; one end of the outer wall of the fifth gear is fixedly connected to one end of the outer wall of the circular rod; a second spring is fixedly connected to one side of the inner wall of the circular shell, and one end of the outer wall of the second spring is fixedly connected to one end of the outer wall of the circular rod; the outer side wall of the circular rod is rotatably connected to a trapezoidal block; the outer side wall of the water pipe is threadedly connected to a threaded rod, and one end of the outer wall of the threaded rod passes through the outer side wall of the water pipe and is located in the water pipe; one end of the outer wall of the threaded rod located in the water pipe is rotatably connected to a movable plate, and one side of the outer wall of the movable plate is slidably connected to the inclined surface of the trapezoidal block.

[0013] As a preferred embodiment of the present invention, a first square shell is fixedly connected to the top of the outer wall of the water pipe, and the first square shell is connected to the water pipe; the inner wall of the first square shell is slidably connected to a limiting plate, and the limiting plate matches the water pipe; a group of circular holes are opened on one side of the outer wall of the limiting plate; a stretching rod is fixedly connected to the top of the outer wall of the limiting plate, and the top of the outer wall of the stretching rod passes through the first square shell, and the stretching rod is slidably connected to the first square shell.

[0014] As a preferred embodiment of the present invention, a pair of fixing grooves are provided on one side of the outer wall of the stretching rod; one side of the outer wall of the first square shell is slidably connected to a pulling rod through a connecting plate, and the connecting plate is L-shaped; a fixing block is fixedly connected to one end of the outer wall of the pulling rod, and the fixing block matches the fixing groove; a fourth spring is fixedly connected to one end of the outer wall of the fixing block, and one end of the outer wall of the fourth spring is fixedly connected to one side of the inner wall of the connecting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotating plate includes a square plate and a buffer shell. When the rotating plate is impacted by brine, the brine will first impact the buffer shell, and the buffer shell will drive the first spring to contract, thereby partially relieving the buffer force, thereby partially relieving the impact force of the first wave, thereby reducing the damage to the rotating plate, increasing the service life of the rotating plate, and making the overall device safer and more stable.

[0016] 2. When the rotating shaft rotates, the rotation of the rotating shaft will drive the third bevel gear to rotate. Since a fourth bevel gear is fixedly connected to one end of the outer wall of the rotating rod, and the fourth bevel gear and the third bevel gear are meshed with each other, the rotation of the third bevel gear drives the rotating rod to rotate through the fourth bevel gear. The rotation of the rotating rod will drive the fifth gear to rotate. Since the fifth gear is meshed with the first annular rack and the other side of the outer wall of the annular cleaning plate is fixedly connected to the first annular rack, and the first annular rack is rotatably connected to the inner wall of the water pipe, the rotation of the fifth gear will drive the first annular rack and the annular cleaning plate to rotate. The rotation of the annular cleaning plate will drive a group of cleaning rods to rotate, so that the rotation of a group of cleaning rods will clean the salt on the inner wall of the water pipe, thereby making the brine safer and more stable during transportation, and also making it less likely for the salt in the brine to increase energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0018] Figure 1 It is the main structure diagram of the present invention; Figure 2 It is a structural diagram of the first generator, the second generator, the base and the rotating plate of the present invention; Figure 3 It is a partial structural diagram of the present invention; Figure 4 It is an exploded structural diagram of the square plate and the buffer shell of the present invention; Figure 5 It is an exploded structural diagram of the rotating rod and the annular cleaning plate of the present invention; Figure 6 It is an exploded structural diagram of the circular shell and the circular rod of the present invention; Figure 7The exploded structural diagram of the cleaning rod and the sixth gear of the present invention; Figure 8 It is an exploded structural diagram of the first square shell and the current limiting plate of the present invention; Fig. 9 For the present invention Figure 8 A partial enlarged view of point A.

[0019] In the figure: 1, power generation device; 101, base; 102, first generator; 103, water pipe; 2, square shell; 3, heat recovery device; 4, rotating shaft; 5, rotating plate; 6, second generator; 7, first rotating shaft; 8, first bevel gear; 9, second bevel gear; 501, square plate; 502, buffer shell; 10, slide groove; 11, limit groove; 12, bolt; 13, third bevel gear; 14, rotating rod; 15, fourth Bevel gear; 16, annular cleaning plate; 17, cleaning rod; 18, first annular rack; 19, fifth gear; 20, annular groove; 21, sixth gear; 22, second annular rack; 141, circular shell; 142, circular rod; 23, trapezoidal block; 24, threaded rod; 25, moving plate; 26, first square shell; 27, current limiting plate; 28, circular hole; 29, stretching rod; 30, fixed groove; 31, pulling rod; 32, fixed block. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 7As shown, a method for energy recovery and utilization in a nitrogen-resistance-dissolving and water-dissolving cavity-making process is implemented based on a power generation device 1, which includes a base 101, a first generator 102 and a water pipe 103; the outer wall of the water pipe 103 is fixedly connected to the top of the outer wall of the base 101 through a pair of first square plates; a square shell 2 is fixedly connected to the top of the outer wall of the water pipe 103, and the square shell 2 is connected to the water pipe 103; the bottom end of the outer wall of the heat recovery device 3 is fixedly connected to the top of the outer wall of the base 101, and one end of the outer wall of the water pipe 103 is connected to the heat recovery device 3; the bottom end of the outer wall of the first generator 102 is fixedly connected to the top of the outer wall of the base 101; a rotating shaft 4 is provided at the output end of the first generator 102, and one end of the outer wall of the rotating shaft 4 passes through one side of the outer wall of the square shell 2 and is located in the square shell 2; a group of rotating shafts are fixedly connected to the outer wall of one end of the rotating shaft 4 located in the square shell 2 Plate 5, and a group of rotating plates 5 are respectively located in the square shell 2 and the water pipe 103. By connecting the water pipe 103 with the brine discharge channel, when the brine is discharged from the brine discharge channel, the brine will flow into the water pipe 103. Because a group of rotating plates 5 are respectively located in the square shell 2 and the water pipe 103, when the brine flows in the water pipe 103, it will impact a group of rotating plates 5, so that a group of rotating plates 5 rotates. The rotation of the rotating plates 5 will drive the rotating shaft 4 to rotate, and the rotation of the rotating shaft 4 will drive the rotor of the first generator 102 to rotate to generate electricity, thereby converting the potential energy generated by the flow of brine into electrical energy, and the brine flowing in the water pipe 103 will eventually flow into the heat recovery device 3 for geothermal energy recovery, so that the device not only recovers the geothermal energy of the brine but also recovers the potential energy of the brine flow, thereby further saving energy consumption and waste, and improving energy utilization efficiency.

[0022] The rotating plate 5 includes a square plate 501 and a buffer shell 502; one end of the outer wall of the square plate 501 is fixedly connected to the outer wall of the rotating shaft 4; a slide groove 10 is provided on one side of the outer wall of the square plate 501; the inner wall of the buffer shell 502 is slidably connected to the outer wall of the square plate 501, and one side of the outer wall of the buffer shell 502 is slidably connected to one side of the inner wall of the slide groove 10, and a sealed space is formed between the buffer shell 502 and the square plate 501; a pair of first springs are fixedly connected to one side of the outer wall of the square plate 501, and one end of the outer wall of the pair of first springs is fixedly connected to one side of the inner wall of the buffer shell 502, and the first spring is located in the sealed space. When brine impacts the rotating plate 5 to rotate the rotating plate 5, when a rotating plate 5 is in the brine When the rotating plate 5 enters the square shell 2 under the impact of brine, another rotating plate 5 will appear in the water pipe 103 and be subjected to the impact of brine. Because the brine has a large impact force under the action of pressure, and the impact force of the rotating plate 5 every time it just contacts the brine has the greatest destructive force, which makes the rotating plate 5 easy to be damaged. The rotating plate 5 includes a square plate 501 and a buffer shell 502, so that when the rotating plate 5 contacts the impact of brine, the brine will first impact the buffer shell 502, and the buffer shell 502 will drive the first spring to contract, thereby dissolving a part of the buffer force, so that a part of the impact force of the first wave is dissipated, thereby reducing the damage to the rotating plate 5, increasing the service life of the rotating plate 5, and making the overall device safer and more stable.

[0023] The outer side wall of one end of the rotating shaft 4 located in the square shell 2 is fixedly connected with a third bevel gear 13; the inner side wall of the water pipe 103 is rotatably connected with a rotating rod 14 through a first block; a fourth bevel gear 15 is fixedly connected with one end of the outer wall of the rotating rod 14, and the fourth bevel gear 15 and the third bevel gear 13 are meshed with each other; the inner side wall of the water pipe 103 is rotatably connected with an annular cleaning plate 16; a group of cleaning rods 17 are provided on one side of the outer wall of the annular cleaning plate 16; a first annular rack 18 is fixedly connected to the other side of the outer wall of the annular cleaning plate 16. The first annular rack 18 is rotatably connected to the inner wall of the water pipe 103; the other end of the outer wall of the rotating rod 14 is fixedly connected with a fifth gear 19, and the fifth gear 19 and the first annular rack 18 are meshed with each other. Because brine is a high-concentration salt water containing multiple chemical components, brine will form salt when flowing in the water pipe 103. The salt formation of brine will not only cause a hard scale layer to form on the inner wall of the water pipe 103, thereby causing pipe blockage, but also the salt formation of brine will increase the roughness of the inner wall of the pipe, increasing the resistance of the brine during the flow process. Increase, thereby leading to increased energy consumption. When the rotating shaft 4 rotates, the rotation of the rotating shaft 4 will drive the third bevel gear 13 to rotate. Because a fourth bevel gear 15 is fixedly connected to one end of the outer wall of the rotating rod 14, and the fourth bevel gear 15 is meshed with the third bevel gear 13, the rotation of the third bevel gear 13 drives the rotating rod 14 to rotate through the fourth bevel gear 15. The rotation of the rotating rod 14 will drive the fifth gear 19 to rotate. Because the fifth gear 19 is meshed with the first annular rack 18, and the first annular rack 18 is fixedly connected to the other side of the outer wall of the annular cleaning plate 16, and the first annular rack 18 is rotatably connected to the inner wall of the water pipe 103, the rotation of the fifth gear 19 will drive the first annular rack 18 and the annular cleaning plate 16 to rotate. The rotation of the annular cleaning plate 16 will drive a group of cleaning rods 17 to rotate, so that the rotation of a group of cleaning rods 17 will clean the salt on the inner wall of the water pipe 103, so that the brine is safer and more stable during transportation, and the salt of the brine is not easy to increase energy consumption.

[0024] A second generator 6 is provided at the top of the outer wall of the base 101; a first rotating shaft 7 is provided at the output end of the second generator 6; a first bevel gear 8 is fixedly connected to the outer side wall of one end of the rotating shaft 4 located outside the square shell 2; a second bevel gear 9 is fixedly connected to one end of the outer wall of the first rotating shaft 7, and the first bevel gear 8 and the second bevel gear 9 are meshed with each other, and the radius of the first bevel gear 8 is greater than the radius of the second bevel gear 9. When the rotating shaft 4 rotates, the rotation of the rotating shaft 4 will drive the first bevel gear 8 to rotate. Because the first bevel gear 8 and the second bevel gear 9 are meshed with each other, the rotation of the first bevel gear 8 will drive the second bevel gear 9 to rotate, and the rotation of the second bevel gear 9 will drive the rotor of the second generator 6 to rotate through the first rotating shaft 7 to generate electricity, so that the device can recycle more energy through the potential energy of brine flow, and because the radius of the first bevel gear 8 is greater than the radius of the second bevel gear 9, the rotation speed of the second generator 6 is greater than the first generator 102, thereby generating more electrical energy, so that the device not only further improves the energy utilization efficiency, but also reduces the cost of energy consumption.

[0025] One end of the outer wall of the cleaning rod 17 is rotatably connected to one side of the outer wall of the annular cleaning plate 16; an annular groove 20 is provided on the outer wall of the cleaning rod 17; a sixth gear 21 is fixedly connected to the inner wall of the annular groove 20; a second annular rack 22 is fixedly connected to the inner wall of the water pipe 103, and the second annular rack 22 is meshed with a group of sixth gears 21. When the cleaning rod 17 moves in a circle around the center point of the annular cleaning plate 16, the rotation of the cleaning rod 17 will drive the sixth gear 21 to rotate. 1 meshes with each other, so that when the sixth gear 21 rotates, the second annular rack 22 does not move and thus rotates, so that the sixth gear 21 drives the cleaning rod 17 to rotate, so that when the cleaning rod 17 cleans the salt on the inner wall of the water pipe 103, the self-rotation of the cleaning rod 17 can not only improve the efficiency of cleaning the salt, but also the self-rotation of the cleaning rod 17 makes the salt on the outer surface of the cleaning rod 17 rub against the salt on the inner wall of the water pipe 103, so that not only the salt on the inner wall of the water pipe 103 is cleaned, but also the salt on the outer surface of the cleaning rod 17 is cleaned.

[0026] The rotating rod 14 includes a circular shell 141 and a circular rod 142; the outer wall of the circular rod 142 is slidably connected to the inner wall of the circular shell 141; one end of the outer wall of the fifth gear 19 is fixedly connected to one end of the outer wall of the circular rod 142; a second spring is fixedly connected to one side of the inner wall of the circular shell 141, and one end of the outer wall of the second spring is fixedly connected to one end of the outer wall of the circular rod 142; the outer wall of the circular rod 142 is rotatably connected to a trapezoidal block 23; the outer wall of the water pipe 103 is threadedly connected to a threaded rod 24, and one end of the outer wall of the threaded rod 24 penetrates the outer wall of the water pipe 103 and is located in the water pipe 103; one end of the outer wall of the threaded rod 24 located in the water pipe 103 is rotatably connected to a moving plate 25, and one side of the outer wall of the moving plate 25 is slidably connected to the trapezoidal block 23 The inclined surface of the trapezoidal block 23 drives the circular rod 142 to move backward, so that the fifth gear 19 is disengaged from the first annular rack 18, so that the cleaning rod 17 does not rotate. When the cleaning rod 17 needs to be rotated, the threaded rod 24 can be reversed. When the device needs to reduce the burden of the rotating plate 5 or does not need to clean the salt temporarily, the cleaning rod 17 can be stopped by rotating the threaded rod 24.

[0027] The bottom end of the outer wall of the second generator 6 is slidably connected to the top end of the outer wall of the base 101; a pair of limiting grooves 11 are provided at the top end of the outer wall of the base 101; the top end of the outer wall of the bottom plate of the second generator 6 is threadedly connected with a bolt 12, and the bottom end of the outer wall of the bolt 12 penetrates the bottom plate of the second generator 6, and the bolt 12 is threadedly connected to the bottom plate of the second generator 6; the bolt 12 matches the pair of limiting grooves 11. When the potential energy of the brine is low or reduced, the potential energy of the brine may not be able to drive the first generator 102 and the second generator 6 to operate at the same time. Because the bottom end of the outer wall of the second generator 6 is slidably connected to the top end of the outer wall of the base 101, When the potential energy of the brine is low or reduced, the bolt 12 is rotated to move the bolt 12 out of the limiting groove 11, thereby releasing the fixation of the second generator 6 and the base 101, and then the second generator 6 is moved to disengage the first bevel gear 8 and the second bevel gear 9. When the second generator 6 moves to a certain position, the bolt 12 is rotated to make the bolt 12 snap into another limiting groove 11 to complete the fixation of the second generator 6. At this time, the potential energy of the brine only needs to drive the first generator 102 to run, so that the device can adjust the position of the second generator 6 according to the potential energy generated by the brine, so that the first generator 102 can operate normally.

[0028] Example 2: Please refer to Figure 1 and Figure 8-Figure 9As shown, a first square shell 26 is fixedly connected to the top of the outer wall of the water pipe 103, and the first square shell 26 is connected to the water pipe 103; the inner wall of the first square shell 26 is slidably connected to a limiting plate 27, and the limiting plate 27 matches the water pipe 103; a group of circular holes 28 are opened on one side of the outer wall of the limiting plate 27; a stretching rod 29 is fixedly connected to the top of the outer wall of the limiting plate 27, and the top of the outer wall of the stretching rod 29 passes through the first square shell 26, and the stretching rod 29 is slidably connected to the first square shell 26. When the brine is discharged, the brine will have different flow velocities due to the pressure, so that the impact force of the brine on the rotating plate 5 The brine is different, so that when the pressure is high, the rotating plate 5 is easily damaged, thereby greatly reducing the service life of the rotating plate 5. By matching the limiting plate 27 with the water pipe 103, when the impact force of the brine is large, the limiting plate 27 can be lowered, so that the impact force of the brine will first impact the limiting plate 27, and then continue to flow through the circular hole 28 on the limiting plate 27, and then contact the rotating plate 5. Because the brine first contacts the limiting plate 27 and then contacts the rotating plate 5, the limiting plate can play a buffering role, so that the impact force of the rotating plate 5 that subsequently contacts the brine is reduced, thereby ensuring the safety of the rotating plate 5.

[0029] A pair of fixing grooves 30 are provided on one side of the outer wall of the stretching rod 29; a pull rod 31 is slidably connected to one side of the outer wall of the first square shell 26 through a connecting plate, and the connecting plate is L-shaped; a fixing block 32 is fixedly connected to one end of the outer wall of the pull rod 31, and the fixing block 32 matches the fixing groove 30; a fourth spring is fixedly connected to one end of the outer wall of the fixing block 32, and one end of the outer wall of the fourth spring is fixedly connected to one side of the inner wall of the connecting plate. When the current limiting plate 27 is not needed, the fixing block 32 is inserted into the fixing groove 30 below the stretching rod 29, so that the fixing block 32 fixes the stretching rod 29 and the current limiting plate 27. The limiting plate 27 is fixed to a certain position so that it will not move. When the limiting plate 27 needs to be used, the pulling rod 31 is pulled to drive the fixing block 32 to move out of the fixing groove 30 and contact the fixing of the limiting plate 27, so that the limiting plate 27 moves downward under the action of gravity. At this time, the pulling rod 31 is released, and the spring of the fourth spring will drive the fixing block 32 to be stuck into the fixing groove 30 on the stretching rod 29 to complete the fixing of the limiting plate 27. When the limiting plate 27 is used to limit and buffer the brine, the limiting plate 27 is not easy to move, thereby making the operation of the device simpler and more convenient when using or not using the limiting plate 27.

[0030] When the present invention is in use, at the initial stage of underground salt mining, nitrogen is first injected to form a nitrogen isolation layer on the top of the cavity to prevent rapid dissolution and thus expand the lower cavity, and then a connecting channel between the ground and the underground storage space is established, the connecting channel including a water injection channel and a brine discharge channel. At night, the valve in the brine discharge channel is closed, and then water is injected into the water injection channel by a high-pressure pump, so that during the water injection process, the water injection pressure is gradually increased to 6-7Mpa. During the continuous water injection and cavity formation process, the dissolution-resistant nitrogen will be compressed to store energy. During the day, the pressure of the underground storage space has reached the standard. At this time, the valve in the brine discharge channel is opened to discharge the brine. At the same time, the high-pressure pump continues to inject water. When the brine is discharged under the action of pressure, the water pipe 103 is first connected to the brine discharge channel to allow the brine to flow out. When flowing in the water pipe 103, it will impact a group of rotating plates 5, causing the group of rotating plates 5 to rotate. The rotation of the rotating plates 5 will drive the rotating shaft 4 to rotate. The rotation of the rotating shaft 4 will drive the rotor of the first generator 102 to rotate to generate electricity, thereby converting the potential energy generated by the flow of brine into electrical energy. When the high-pressure pump is injecting water during brine discharge, the power is transmitted to the high-pressure pump through the power generation device 1, so that the high-pressure pump operates through self-sufficient electricity, reducing the cost of electricity use, and keeping the injection pressure at 6-7Mpa, thereby ensuring that the brine has sufficient potential energy when discharging brine. When the brine is discharged through the brine discharge channel, the temperature of the brine is 50-60°C, so that when the brine flows into the heat recovery device 3 through the water pipe 103, the heat recovery device 3 recovers and reuses the geothermal energy in the brine. Thereby, the energy utilization efficiency of the device is improved. When the brine impacts the rotating plate 5 to rotate the rotating plate 5, when one rotating plate 5 enters the square shell 2 under the impact of the brine, the other rotating plate 5 will appear in the water pipe 103 and withstand the impact of the brine. Because the brine has a large impact force under the action of pressure, and the impact force of the rotating plate 5 every time it just contacts the brine has the greatest destructive force, so that the rotating plate 5 is easily damaged. The rotating plate 5 includes a square plate 501 and a buffer shell 502, so that when the rotating plate 5 contacts the impact of brine, the brine will first impact the buffer shell 502, and the buffer shell 502 will drive the first spring to contract, thereby dissolving a part of the buffer force, so that the impact force of the first wave is partially dissipated, thereby reducing the damage to the rotating plate 5, and making the rotating plate 5 The service life of the rotating shaft 4 is increased, and the overall device is safer and more stable. When the rotating shaft 4 rotates, the rotation of the rotating shaft 4 will drive the third bevel gear 13 to rotate. Because the fourth bevel gear 15 is fixedly connected to one end of the outer wall of the rotating rod 14, and the fourth bevel gear 15 is meshed with the third bevel gear 13, the rotation of the third bevel gear 13 drives the rotating rod 14 to rotate through the fourth bevel gear 15, and the rotation of the rotating rod 14 will drive the fifth gear 19 to rotate. Because the fifth gear 19 is meshed with the first annular rack 18, and the first annular rack 18 is fixedly connected to the other side of the outer wall of the annular cleaning plate 16, and the first annular rack 18 is rotatably connected to the inner wall of the water pipe 103, the rotation of the fifth gear 19 will drive the first annular rack 18 and the annular cleaning plate 16 to rotate.The rotation of the annular cleaning plate 16 will drive a group of cleaning rods 17 to rotate, so that the rotation of the group of cleaning rods 17 will clean the salt on the inner wall of the water pipe 103, so that the brine is safer and more stable during transportation, and the salt accumulation of the brine is not easy to increase the energy consumption. When the cleaning rods 17 make a circular motion around the center point of the annular cleaning plate 16, the rotation of the cleaning rods 17 will drive the sixth gear 21 to rotate. Because the second annular rack 22 and a group of sixth gears 21 are meshed with each other, when the sixth gear 21 rotates, the second annular rack 22 does not move, so it rotates, so that the sixth gear 21 drives the cleaning rods 17 to rotate, so that when the cleaning rods 17 clean the salt on the inner wall of the water pipe 103, the self-rotation of the cleaning rods 17 can not only improve the cleaning efficiency. The efficiency of cleaning salt is improved, and the self-rotation of the cleaning rod 17 causes the salt on the outer surface of the cleaning rod 17 to rub against the salt on the inner wall of the water pipe 103, thereby not only cleaning the salt on the inner wall of the water pipe 103, but also cleaning the salt on the outer surface of the cleaning rod 17. The rotating rod 14 includes a circular shell 141 and a circular rod 142, so that when the threaded rod 24 is rotated, the threaded rod 24 is threadedly connected with the water pipe 103, so that the rotation of the threaded rod 24 causes the threaded rod 24 to move, and the movement of the threaded rod 24 drives the moving plate 25 to move. The movement of the moving plate 25 causes one side of the outer wall of the moving plate 25 to slide on the inclined surface of the trapezoidal block 23, so that the trapezoidal block 23 drives the circular rod 142 to move backward, so that the fifth gear 19 is disengaged from the first annular rack 18, so that the cleaning rod 17 will not rotate. When the cleaning rod 17 needs to be rotated, the threaded rod 24 can be reversed. Therefore, when the device needs to reduce the burden of the rotating plate 5 or does not need to clean the salt temporarily, the cleaning rod 17 can be stopped by rotating the threaded rod 24. When the rotating shaft 4 rotates, the rotation of the rotating shaft 4 will drive the first bevel gear 8 to rotate. Because the first bevel gear 8 and the second bevel gear 9 are meshed with each other, the rotation of the first bevel gear 8 will drive the second bevel gear 9 to rotate. The rotation of the second bevel gear 9 will drive the rotor of the second generator 6 to rotate through the first rotating shaft 7 to generate electricity. Therefore, the device can recycle more energy through the potential energy of the brine flow. In addition, the radius of the first bevel gear 8 is greater than the radius of the second bevel gear 9, so that the rotation speed of the second generator 6 is greater than The first generator 102 generates more electric energy, so that the device not only further improves the energy utilization efficiency, but also reduces the cost of energy consumption. When the potential energy of the brine is low or reduced, the potential energy of the brine may not be able to drive the first generator 102 and the second generator 6 to operate at the same time. Because the bottom end of the outer wall of the second generator 6 is slidably connected to the top end of the outer wall of the base 101, when the potential energy of the brine is low or reduced, the bolt 12 is rotated to move the bolt 12 out of the limit groove 11, and the fixation of the second generator 6 and the base 101 is released, and then the second generator 6 is moved to disengage the first bevel gear 8 and the second bevel gear 9. When the second generator 6 moves to a certain position, the bolt 12 is rotated to make the bolt 12 stuck in another limit groove 11.After the second generator 6 is fixed, the potential energy of the brine only needs to drive the first generator 102 to run, so that the device can adjust the position of the second generator 6 according to the potential energy generated by the brine, so that the first generator 102 can operate normally. When the brine is discharged, the flow rate of the brine will be different due to the size of the pressure, so that the impact force of the brine on the rotating plate 5 is different, so that the brine is easy to lose the rotating plate 5 under a large pressure, thereby greatly reducing the service life of the rotating plate 5. By matching the limiting plate 27 with the water pipe 103, when the impact force of the brine is large, the limiting plate 27 can be lowered, so that the impact force of the brine will first impact the limiting plate 27, and then continue to flow through the circular hole 28 on the limiting plate 27, and then contact the rotating plate 5. Because the brine first contacts the limiting plate 27 and then contacts the rotating plate 5, the limiting plate can play a buffering role. The impact force of the rotating plate 5 that subsequently contacts the brine is reduced, thereby ensuring the safety of the rotating plate 5, and the fixing block 32 is inserted into the fixing groove 30 below the stretching rod 29, so that the fixing block 32 fixes and limits the stretching rod 29 and the current limiting plate 27 so that they will not move. When the current limiting plate 27 needs to be used, the pulling rod 31 is pulled so that the pulling rod 31 drives the fixing block 32 to move out of the fixing groove 30 and contact the fixing of the current limiting plate 27, so that the current limiting plate 27 moves downward under the action of gravity. At this time, the pulling rod 31 is released, and the spring of the fourth spring drives the fixing block 32 to be inserted into the fixing groove 30 above the stretching rod 29 to complete the fixing of the current limiting plate 27, so that the current limiting plate 27 is not easy to move when the current limiting plate 27 is limiting and buffering the brine, thereby making the operation of the device simpler and more convenient when using and not using the current limiting plate 27.

[0031] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for energy recovery and utilization in the process of nitrogen-resistance dissolution and water-dissolution cavity making, It is characterized in that The method comprises the following steps: Step 1: Select a certain volume of underground salt mine; Step 2: In the early stage of underground salt mining, nitrogen is injected to form a nitrogen isolation layer at the top of the cavity to prevent rapid dissolution and thus expand the lower cavity; Step 3: Establish a connecting channel between the ground and underground storage spaces, including a water injection channel and a brine discharge channel; Step 4: Close the valve in the brine discharge channel at night, and then use a high-pressure pump to inject water into the water injection channel. During the water injection process, the water injection pressure gradually increases to 6-7Mpa. During the continuous water injection and cavity creation process, the nitrogen that is resistant to dissolution will be compressed and store energy; Step 5: During the day, the valve in the brine discharge channel is opened to discharge the brine. At the same time, the high-pressure pump continues to inject water. When the brine is discharged under the action of pressure, the potential energy of the brine flow is converted into electrical energy through the power generation device (1); Step 6: When the high-pressure pump is injecting water, electricity is transmitted to the high-pressure pump through the power generation device (1) so that the injection pressure is maintained at 6-7 MPa; Step 7: When the brine is discharged through the brine discharge channel, the temperature of the brine is 50-60° C. The brine is passed through the power generation device (1) to generate electricity, and then enters the heat recovery device (3), so that the heat recovery device (3) recovers and reuses the geothermal energy in the brine.

2. The energy recovery and utilization method in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 1, It is characterized in that The power generation device (1) comprises a base (101), a first generator (102) and a water pipe (103); the outer wall of the water pipe (103) is fixedly connected to the top of the outer wall of the base (101) via a pair of first square plates; a square shell (2) is fixedly connected to the top of the outer wall of the water pipe (103), and the square shell (2) is connected to the water pipe (103); the bottom end of the outer wall of the heat recovery device (3) is fixedly connected to the top of the outer wall of the base (101), and one end of the outer wall of the water pipe (103) is connected to the heat recovery device (3); The first generator (102) is connected to an energy recovery device (3); the bottom end of the outer wall of the first generator (102) is fixedly connected to the top end of the outer wall of the base (101); a rotating shaft (4) is provided at the output end of the first generator (102), and one end of the outer wall of the rotating shaft (4) passes through one side of the outer wall of the square shell (2) and is located in the square shell (2); a group of rotating plates (5) are fixedly connected to the outer wall of one end of the rotating shaft (4) located in the square shell (2), and the group of rotating plates (5) are respectively located in the square shell (2) and in the water pipe (103).

3. The energy recovery and utilization method in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 2, It is characterized in that A second generator (6) is provided at the top end of the outer wall of the base (101); a first rotating shaft (7) is provided at the output end of the second generator (6); a first bevel gear (8) is fixedly connected to the outer wall of one end of the rotating shaft (4) located outside the square shell (2); a second bevel gear (9) is fixedly connected to one end of the outer wall of the first rotating shaft (7), and the first bevel gear (8) and the second bevel gear (9) are meshed with each other, and the radius of the first bevel gear (8) is greater than the radius of the second bevel gear (9).

4. The energy recovery and utilization method in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 2, It is characterized in that The rotating plate (5) comprises a square plate (501) and a buffer shell (502); one end of the outer wall of the square plate (501) is fixedly connected to the outer wall of the rotating shaft (4); a slide groove (10) is provided on one side of the outer wall of the square plate (501); the inner wall of the buffer shell (502) is slidably connected to the outer wall of the square plate (501), and one side of the outer wall of the buffer shell (502) is slidably connected to one side of the inner wall of the slide groove (10), and a sealed space is formed between the buffer shell (502) and the square plate (501); a pair of first springs are fixedly connected to one side of the outer wall of the square plate (501), and one end of the outer wall of the pair of first springs is fixedly connected to one side of the inner wall of the buffer shell (502), and the first springs are located in the sealed space.

5. The energy recovery and utilization method in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 3, It is characterized in that The bottom end of the outer wall of the second generator (6) is slidably connected to the top end of the outer wall of the base (101); a pair of limit grooves (11) are provided at the top end of the outer wall of the base (101); a bolt (12) is threadedly connected to the top end of the outer wall of the bottom plate of the second generator (6), and the bottom end of the outer wall of the bolt (12) passes through the bottom plate of the second generator (6), and the bolt (12) is threadedly connected to the bottom plate of the second generator (6); the bolt (12) matches the pair of limit grooves (11).

6. The energy recovery and utilization method in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 2, It is characterized in that The outer wall of one end of the rotating shaft (4) located in the square shell (2) is fixedly connected to a third bevel gear (13); the inner wall of the water pipe (103) is rotatably connected to a rotating rod (14) through a first block; one end of the outer wall of the rotating rod (14) is fixedly connected to a fourth bevel gear (15), and the fourth bevel gear (15) and the third bevel gear (13) are meshed with each other; the inner wall of the water pipe (103) is rotatably connected to an annular cleaning plate (16); a group of cleaning rods (17) are provided on one side of the outer wall of the annular cleaning plate (16); the other side of the outer wall of the annular cleaning plate (16) is fixedly connected to a first annular rack (18), and the first annular rack (18) is rotatably connected to the inner wall of the water pipe (103); the other end of the outer wall of the rotating rod (14) is fixedly connected to a fifth gear (19), and the fifth gear (19) and the first annular rack (18) are meshed with each other.

7. The method for energy recovery and utilization in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 6, It is characterized in that One end of the outer wall of the cleaning rod (17) is rotatably connected to one side of the outer wall of the annular cleaning plate (16); an annular groove (20) is formed on the outer wall of the cleaning rod (17); a sixth gear (21) is fixedly connected to the inner wall of the annular groove (20); a second annular rack (22) is fixedly connected to the inner wall of the water pipe (103), and the second annular rack (22) is meshed with a set of sixth gears (21).

8. The method for energy recovery and utilization in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 7, It is characterized in that The rotating rod (14) comprises a circular shell (141) and a circular rod (142); the outer wall of the circular rod (142) is slidably connected to the inner wall of the circular shell (141); one end of the outer wall of the fifth gear (19) is fixedly connected to one end of the outer wall of the circular rod (142); a second spring is fixedly connected to one side of the inner wall of the circular shell (141), and one end of the outer wall of the second spring is fixedly connected to one end of the outer wall of the circular rod (142); the outer wall of the circular rod (142) is rotatably connected to a trapezoidal block (23); the outer wall of the water pipe (103) is threadedly connected to a threaded rod (24), and one end of the outer wall of the threaded rod (24) penetrates the outer wall of the water pipe (103) and is located in the water pipe (103); one end of the outer wall of the threaded rod (24) located in the water pipe (103) is rotatably connected to a movable plate (25), and one side of the outer wall of the movable plate (25) is slidably connected to the inclined surface of the trapezoidal block (23).

9. The method for energy recovery and utilization in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 2, It is characterized in that A first square shell (26) is fixedly connected to the top of the outer wall of the water pipe (103), and the first square shell (26) is in communication with the water pipe (103); a limiting plate (27) is slidably connected to the inner wall of the first square shell (26), and the limiting plate (27) matches the water pipe (103); a group of circular holes (28) are provided on one side of the outer wall of the limiting plate (27); a stretching rod (29) is fixedly connected to the top of the outer wall of the limiting plate (27), and the top of the outer wall of the stretching rod (29) passes through the first square shell (26), and the stretching rod (29) is slidably connected to the first square shell (26).

10. The method for energy recovery and utilization in the process of nitrogen-resistance dissolution and water-dissolution cavity making according to claim 9, It is characterized in that A pair of fixing grooves (30) are formed on one side of the outer wall of the stretching rod (29); a pulling rod (31) is slidably connected to one side of the outer wall of the first square shell (26) via a connecting plate, and the connecting plate is L-shaped; a fixing block (32) is fixedly connected to one end of the outer wall of the pulling rod (31), and the fixing block (32) matches the fixing groove (30); a fourth spring is fixedly connected to one end of the outer wall of the fixing block (32), and one end of the outer wall of the fourth spring is fixedly connected to one side of the inner wall of the connecting plate.

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