A salt cavity structure and a method for using the salt cavity for waste disposal and energy storage

Abstract

The present application provides a salt cavity structure and a method for using the salt cavity for waste disposal and energy storage, including a waste disposal cavity, a waste injection cavity and an energy storage cavity, wherein injection channels are provided between the waste disposal cavity, the waste injection cavity and the energy storage cavity and the ground surface, the waste disposal cavity and the energy storage cavity are respectively arranged on both sides of the waste injection cavity, the bottom of the energy storage cavity is located above the horizontal plane where the top of the waste injection cavity is located, and forms a mutually incompatible critical plane with the energy storage. By step one, an injection channel is opened, a waste disposal cavity and a waste injection cavity are dissolved and constructed, and a first connecting channel is opened, by step two, an energy storage cavity is opened and a second connecting channel is opened, by step three, a pipeline and a ground device are installed in the wellbore, by step four, liquid waste is treated and energy is stored, and by step five, energy materials are extracted, the problem that the salt cavity cannot be used for waste disposal and energy storage at the same time in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of waste disposal, and in particular to a salt cavity structure and a method for using the salt cavity for waste disposal and energy storage. Background Art

[0002] The composition of waste is extremely complex, including a variety of toxic and hazardous substances, such as radioactive elements, organic matter, heavy metals, organic and inorganic salts and other pollutants. The traditional disposal methods of these wastes are surface accumulation, shallow surface landfill, incineration, etc., because these treatment methods cannot fundamentally isolate the waste from the biosphere permanently, and thus cannot completely eliminate the impact of these pollutants on the ecological environment. Due to the low permeability, good creep characteristics and damage self-recovery characteristics of salt rock, salt cavities are widely used in the storage of fossil energy reserves such as oil and natural gas, compressed gas energy storage, alkali slag backfill and other projects, so the comprehensive utilization of underground space in salt cavities is also increasingly valued.

[0003] Existing technologies mainly focus on salt cavity construction, using salt cavities for energy storage or using salt cavities for waste disposal. As the country's requirements for environmental protection become higher and higher, the requirements for waste disposal will also become higher and higher, resulting in higher and higher waste disposal costs. Summary of the invention

[0004] The object of the present invention is to provide a salt chamber structure and a method for using the salt chamber for waste disposal and energy storage, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A salt chamber structure comprises a waste disposal chamber, a waste perfusion chamber and an energy storage chamber, wherein the waste disposal chamber, the waste perfusion chamber and the energy storage chamber are all opened in a salt layer below the ground surface, and perfusion channels are opened between the waste disposal chamber, the waste perfusion chamber and the energy storage chamber and the ground surface, and the perfusion channel between the energy storage chamber and the ground surface is formed by a third wellbore, the waste disposal chamber and the energy storage chamber are respectively arranged on both sides of the waste perfusion chamber, and the bottom of the energy storage chamber is located above the horizontal plane where the top of the waste perfusion chamber is located, a first connecting channel is provided between the waste disposal chamber and the waste perfusion chamber, and the waste disposal chamber and the waste perfusion chamber are conductively connected through the first connecting channel, and a second connecting channel is provided between the waste perfusion chamber and the energy storage chamber, one end of the second connecting channel is conductively connected to the top of the waste perfusion chamber, and the other end of the second connecting channel is conductively connected to the bottom of the energy storage chamber.

[0007] As a further solution of the present invention: the injection channel between the waste disposal chamber and the ground surface is composed of a first wellbore, and a detachable chemical injection pipe is provided inside the first wellbore. The chemical injection pipe is inserted into the inside of the first wellbore, and one end of the chemical injection pipe is located at the opening between the first wellbore and the ground surface, and the other end of the chemical injection pipe extends to the inside of the waste disposal chamber. A discharge gap is left between the outer wall of the chemical injection pipe and the inner wall of the first wellbore. A detachable chemical injection pipe is provided inside the first wellbore, so that the chemical injection pipe can be easily removed and replaced after being used for a period of time in the chemically corrosive first wellbore.

[0008] As a further solution of the present invention: the injection channel between the waste injection chamber and the ground surface is composed of a second wellbore, and a detachable waste slurry injection pipe is provided inside the second wellbore, one end of the waste slurry injection pipe is located at the opening between the second wellbore and the ground surface, and the other end of the waste slurry injection pipe extends to the interior of the waste injection chamber.

[0009] As a further solution of the present invention: a waste slurry preparation device is provided at one end of the opening between the second wellbore and the ground surface, and waste slurry is injected into the waste injection chamber through the waste slurry preparation device via the waste slurry injection pipe, so that liquid waste inside the waste injection chamber can flow back between the first connecting channel and the second connecting channel.

[0010] As a further solution of the present invention: the bottom of the waste disposal chamber and the bottom of the waste perfusion chamber are on the same horizontal plane, one end of the first connecting channel is conductively connected to the bottom of the waste disposal chamber, and the other end of the first connecting channel is conductively connected to the bottom of the waste disposal chamber, and the liquid waste inside the waste disposal chamber flows into the interior of the waste disposal chamber for chemical treatment through the first connecting channel.

[0011] As a further solution of the present invention: the top of the waste infusion chamber is connected to the bottom of the energy storage chamber through a second connecting channel. When energy storage is performed, the liquid waste inside the waste infusion chamber flows to the inside of the waste disposal chamber through the second connecting channel for chemical treatment. When energy extraction is performed, the liquid waste inside the waste infusion chamber flows to the inside of the energy storage chamber through the second connecting channel to discharge the stored energy to the surface, thereby completing the extraction and utilization of the stored energy.

[0012] The method of using a salt cavity for waste disposal and energy storage is implemented according to the above-mentioned salt cavity structure, and the implementation steps include:

[0013] Step 1: Open a first wellbore, a second wellbore, a first connecting channel, construct a waste disposal salt cavity and a waste injection salt cavity, drill into the underground salt layer through horizontal well connection technology at positions above the waste disposal cavity and the waste injection cavity on the surface to obtain the first wellbore and the second wellbore, and use water solution mining technology to dissolve and construct the waste disposal salt cavity, the waste injection salt cavity and the first connecting channel respectively;

[0014] Step 2: Open a third wellbore, a second connecting channel, and build an energy reserve salt cavity. Use a horizontal directional well connection technology to build a third wellbore connecting the waste injection salt cavity and the surface at a position above the energy reserve salt cavity on the surface. Use a backward dissolution mining technology to dissolve and build the energy reserve salt cavity and the second connecting channel.

[0015] Step three, installing pipelines and ground devices in the wellbore, installing a reagent injection pipe inside the first wellbore obtained in step one, and putting waste treatment reagents into the waste disposal chamber through the reagent injection pipe, so that the waste treatment reagents fall into the waste disposal chamber, and the waste treatment reagents in the waste disposal chamber react with the liquid waste; installing a waste slurry injection pipe inside the second wellbore obtained in step one, and providing a waste slurry preparation device above the second wellbore, and injecting waste slurry into the waste perfusion chamber through the waste slurry preparation device through the waste slurry injection pipe;

[0016] Step 4, liquid waste treatment and energy storage, through the waste slurry preparation device in step 3, the waste slurry is injected into the waste injection cavity through the waste slurry injection pipe, and the liquid waste in the waste injection cavity flows back into the waste disposal cavity through the first connecting channel obtained in step 1, until the original liquid material in the waste disposal cavity is completely emptied, at the same time, the reagent injection pipe in the first wellbore is opened to put waste treatment reagents into the waste disposal cavity, so that the chemical agents reduce or eliminate the toxicity and harmfulness of the liquid waste in the waste disposal cavity, and the energy material to be stored is continuously injected into the energy storage salt cavity through the third wellbore obtained in step 2, and the energy material from the energy storage cavity discharges the liquid waste treated with chemical agents in the waste disposal cavity to the surface through the first wellbore, until the critical plane of incompatibility between the reserve energy and the liquid waste in the energy storage cavity is located at a distance of 3 to 5 m above the horizontal plane where the top of the second connecting channel 8 is located, and the injection of energy material is stopped, the first wellbore is closed, and the third wellbore is closed, and the treatment of liquid waste and the storage of energy material are completed;

[0017] Step 5: Extraction of energy materials. After the liquid waste in the waste disposal chamber is treated, the third wellbore is opened, and the waste slurry is injected into the waste infusion chamber through the waste slurry injection pipe by the waste slurry preparation device in step 3, so that the liquid waste in the waste infusion chamber flows back into the energy storage chamber through the second connecting channel obtained in step 2, so that the energy storage chamber is lifted from the critical plane well energy storage chamber to the third wellbore, and the reserve energy is discharged to the surface through the third wellbore, thereby completing the extraction and utilization of the reserve energy in the energy storage chamber.

[0018] As a further solution of the present invention: the vertical cross-sectional height of the first connecting channel and the second connecting channel in step one is greater than 8m, and a certain amount of sediment is inevitably accumulated inside the first connecting channel and the second connecting channel. The material exchange between the waste disposal chamber, the waste infusion chamber and the energy storage chamber is smooth through the first connecting channel and the second connecting channel with a cross-sectional height greater than 8m.

[0019] As a further solution of the present invention: the critical plane in step four should be located at a position not less than 3 to 5 meters above the horizontal plane where the top of the second connecting channel is located, so as to prevent the reserved energy inside the energy storage chamber from flowing back between the waste disposal chamber and the waste infusion chamber, while ensuring that there is a larger energy storage space inside the energy storage chamber.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a salt cavity structure and a method for using the salt cavity for waste disposal and energy storage. By providing a waste disposal cavity, a waste injection cavity and an energy storage cavity, waste disposal and energy storage can be performed simultaneously. At the same time, through the second connecting channel between the waste injection cavity and the energy storage cavity, liquid waste can enter the energy storage cavity through the second connecting channel, so that oil substances in the waste can flow smoothly into the energy storage cavity and form a mutually insoluble critical plane with the reserve energy. By injecting waste slurry into the second wellbore, liquid waste can enter the waste disposal cavity, the waste injection cavity and the energy storage cavity respectively, realizing the waste disposal and the storage and extraction of energy substances, solving the problem in the prior art that the salt cavity cannot be used for waste disposal and energy storage at the same time, and achieving the technical effect of low-cost large-scale waste disposal and efficient energy storage at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0023] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0024] Figure 1 A schematic diagram of the structure of a salt chamber provided in an embodiment of the present application.

[0025] Figure 2 for Figure 1 Schematic diagram of the locally enlarged structure of A in the middle.

[0026] Figure 3 A schematic diagram of energy storage in a method for waste disposal and energy storage using a salt cavity provided in an embodiment of the present application.

[0027] Figure 4 A schematic diagram of the workflow of a method for waste disposal and energy storage using a salt chamber provided in an embodiment of the present application.

[0028] Figure 5 A schematic diagram of the process of extracting and utilizing reserved energy in a method for waste disposal and energy storage using a salt cavity provided in an embodiment of the present application.

[0029] In the figure: 1-first wellbore, 3-second wellbore, 5-third wellbore, 2-waste disposal chamber, 4-waste injection chamber, 6-energy storage chamber, 7-first connecting channel, 8-second connecting channel, 9-ground surface, 10-slurry waste, 11-waste slurry preparation device, 12-reserve energy, 13-waste treatment agent, 14-critical plane, 15-waste slurry injection pipe, 16-agent injection pipe, discharge gap 101. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] Please refer to the attached Figures 1 to 5 The present application provides a salt chamber structure and a method for using the salt chamber for waste disposal and energy storage, including:

[0032] A salt chamber structure includes a waste disposal chamber 2, a waste perfusion chamber 4 and an energy storage chamber 6, wherein the waste disposal chamber 2, the waste perfusion chamber 4 and the energy storage chamber 6 are all opened in the salt rock layer below the ground surface 9, and perfusion channels are opened between the waste disposal chamber 2, the waste perfusion chamber 4 and the energy storage chamber 6 and the ground surface 9, and the perfusion channel between the energy storage chamber 6 and the ground surface 9 is formed by a third wellbore 5.

[0033] The waste disposal chamber 2 and the energy storage chamber 6 are respectively arranged on both sides of the waste perfusion chamber 4, and the bottom of the energy storage chamber 6 is located above the horizontal plane where the top of the waste perfusion chamber 4 is located. A first connecting channel 7 is provided between the waste disposal chamber 2 and the waste perfusion chamber 4, and the waste disposal chamber 2 and the waste perfusion chamber 4 are conductively connected through the first connecting channel 7. A second connecting channel 8 is provided between the waste perfusion chamber 4 and the energy storage chamber 6, and one end of the second connecting channel 8 is conductively connected to the top of the waste perfusion chamber 4, and the other end of the second connecting channel 8 is conductively connected to the bottom of the energy storage chamber 6.

[0034] The injection channel between the waste disposal chamber 2 and the ground surface 9 is composed of a first wellbore 1. A detachable chemical injection pipe 16 is provided inside the first wellbore 1. The chemical injection pipe 16 is inserted into the first wellbore 1. One end of the chemical injection pipe 16 is located at the opening between the first wellbore 1 and the ground surface 9. The other end of the chemical injection pipe 16 extends to the interior of the waste disposal chamber 2. A discharge gap 101 is left between the outer wall of the chemical injection pipe 16 and the inner wall of the first wellbore 1. A detachable chemical injection pipe 16 is provided inside the first wellbore 1, so that the chemical injection pipe 16 can be easily removed and replaced after being used for a period of time in the chemically corrosive first wellbore 1.

[0035] The injection channel between the waste injection chamber 4 and the ground surface 9 is formed by the second wellbore 3. A detachable waste slurry injection pipe 15 is provided inside the second wellbore 3. One end of the waste slurry injection pipe 15 is located at the opening between the second wellbore 3 and the ground surface 9, and the other end of the waste slurry injection pipe 15 extends to the interior of the waste injection chamber 4.

[0036] refer to Figure 3 A waste slurry preparation device 11 is provided at one end of the waste slurry injection pipe 15 located at the opening between the second wellbore 3 and the ground surface 9. The waste slurry is injected into the waste injection chamber 4 through the waste slurry preparation device 11 through the waste slurry injection pipe 15, so that the liquid waste 10 in the waste injection chamber 4 can flow back between the first connecting channel 7 and the second connecting channel 8.

[0037] The bottom of the waste disposal chamber 2 and the bottom of the waste infusion chamber 4 are on the same horizontal plane, one end of the first connecting channel 7 is conductively connected to the bottom of the waste disposal chamber 2, and the other end of the first connecting channel 7 is conductively connected to the bottom of the waste infusion chamber 4, and the liquid waste 10 inside the waste infusion chamber 4 flows into the interior of the waste disposal chamber 2 for chemical treatment through the first connecting channel 7.

[0038] The method of using a salt cavity for waste disposal and energy storage is implemented according to the above-mentioned salt cavity structure, and the implementation steps include:

[0039] Step one, open a first wellbore 1, a second wellbore 3, a first connecting channel 7, construct a waste disposal salt cavity 2 and a waste injection salt cavity 4, and drill into the underground salt layer at a position above the waste disposal cavity 2 and the waste injection cavity 4 on the surface 9 through horizontal well connection technology to obtain the first wellbore 1 and the second wellbore 3, and use horizontal well water solution mining technology to dissolve and construct the waste disposal salt cavity 2, the waste injection salt cavity 4 and the first connecting channel 7 in the first wellbore 1 and the second wellbore 3 respectively, and the first connecting channel 7 is connected to the bottom of the waste disposal cavity 2 and the waste injection cavity 4 respectively.

[0040] Step 2: open a third wellbore 5, a second connecting channel 8, and build an energy storage salt cavity 6. At a position above the energy storage salt cavity 6 on the surface 9, a third wellbore 5 connected to the top of the waste injection salt cavity 4 is built using horizontal directional well connection technology. The energy storage salt cavity 6 and the second connecting channel 8 are dissolved and constructed using backward dissolution mining technology.

[0041] Step three, installing a pipe column and a ground device in the wellbore, installing a reagent injection pipe 16 in the first wellbore 1 obtained in step one, and putting a waste treatment reagent 13 into the waste disposal chamber 2 through the reagent injection pipe 16, so that the waste treatment reagent 13 falls into the waste disposal chamber 2, and the waste treatment reagent 13 in the waste disposal chamber 2 reacts with the liquid waste 10; installing a waste slurry injection pipe 15 in the second wellbore 3 obtained in step one, and providing a waste slurry preparation device 11 above the second wellbore 3, and injecting waste slurry into the waste perfusion chamber 4 through the waste slurry preparation device 11 through the waste slurry injection pipe 15;

[0042] Step 4, liquid waste treatment and energy storage, through the waste slurry preparation device 11 in step 3, the waste slurry is injected into the waste injection chamber 4 through the waste slurry injection pipe 15, and the liquid waste 10 in the waste injection chamber 4 flows back into the waste disposal chamber 2 through the first connecting channel 7 obtained in step 1, until the original liquid material (saturated brine or treated liquid waste) in the waste disposal chamber 2 is completely emptied, at the same time, the chemical injection pipe 16 in the first wellbore 1 is opened to put the waste treatment chemical 13 into the waste disposal chamber 2, so that the chemical 13 reduces or eliminates the toxicity and harmfulness of the liquid waste 10 in the waste disposal chamber, and the first connecting channel 7 obtained in step 2 is used to inject the waste treatment chemical 13 into the waste disposal chamber 2. The third wellbore 5 continuously injects the reserve energy 12 required for storage into the energy storage salt cavity 6, and the reserve energy 12 from the energy storage cavity 6 discharges the liquid waste 10 treated with the chemical agent 13 in the waste disposal cavity 2 through the first connecting channel 7 and the second connecting channel 8 through the discharge gap 101 in the first wellbore 1 to the ground surface 9, until the incompatible critical plane 14 between the reserve energy 12 in the energy storage cavity 6 and the liquid waste 10 is located 3 to 5 meters above the horizontal plane where the top of the second connecting channel 8 is located, and then the injection of the reserve energy 12 is stopped, the first wellbore 1 is closed, and the third wellbore 5 is closed, and the treatment of the liquid waste 10 and the storage of the energy material 12 are completed;

[0043] Step 5: Extraction of energy materials. After the liquid waste 10 in the waste disposal chamber 2 is processed, the third wellbore 5 is opened, and the waste slurry is injected into the waste infusion chamber through the waste slurry injection pipe 15 by the waste slurry preparation device 11 in step 3, so that the liquid waste 10 in the waste infusion chamber 4 flows back into the energy storage chamber 6 through the second connecting channel 8 obtained in step 2, so that the energy storage chamber 6 lifts the reserve energy 12 in the energy storage chamber 6 to the third wellbore 5 through the critical plane 14, and the reserve energy 12 is discharged to the surface 9 through the third wellbore 5, thereby completing the extraction and utilization of the reserve energy 12 in the energy storage chamber 6.

[0044] In step one and step two, the cross-sectional height of the first connecting channel 7 and the second connecting channel 8 is greater than 8m. A certain amount of solid sediment is inevitably accumulated inside the first connecting channel 7 and the second connecting channel 8. The first connecting channel 7 and the second connecting channel 8 with a cross-sectional height of 8m enable smooth material exchange between the waste disposal chamber 2, the waste infusion chamber 4 and the energy storage chamber 6.

[0045] The critical plane 14 in step 4 should be located at a position not less than 3 to 5 m above the horizontal plane where the top of the second connecting channel 8 is located.

[0046] The working process is as follows: firstly, the liquid waste 10 is processed and the reserve energy 12 is stored, the third shaft 5 is closed by the external gate valve, the external gate valve of the discharge gap 101 is opened, the external gate valve of the second shaft 3 is opened, and the liquid waste 10 is injected into the waste injection chamber 4 through the waste slurry injection pipe 15 by the waste slurry preparation device 11 arranged above the second shaft 3, so that the liquid waste 10 in the waste injection chamber 4 flows back to the waste disposal chamber 2 through the first connecting channel 7 until the original liquid substances in the waste disposal chamber 2 are completely emptied;

[0047] The second shaft 3 is closed by an external gate valve, the discharge gap 101 is closed by an external gate valve, and at the same time, the reagent injection pipe 16 is opened to inject the waste treatment reagent 13 into the waste treatment chamber 2, so that the chemical reagent reduces or eliminates the toxicity and harmfulness of the liquid waste 10 in the waste treatment chamber 2. After the liquid waste 10 is treated, the external gate valve of the reagent injection pipe 16 is closed;

[0048] Open the external gate valve of the third shaft 5, open the external gate valve of the discharge gap 101, and inject the reserve energy 12 into the energy storage chamber 6 through the energy transmission pipeline at the surface 9 through the third shaft 5. As the reserve energy 12 is continuously injected into the energy storage chamber 6, the liquid waste 10 after chemical treatment is discharged from the surface 9 along the discharge gap 101 until the critical plane 14 is 3 to 5 meters above the horizontal plane where the top of the second connecting channel 8 is located. Close the external gate valves of the third shaft 5 and the discharge gap 101 to complete the treatment of the liquid waste 10 and the storage of the energy 12. Figure 4 shown.

[0049] After the treatment of the liquid waste 10 is completed, the external gate valves of the second wellbore 3 and the third wellbore 5 are opened, and the liquid waste 10 is injected into the waste injection chamber 4 through the waste slurry injection pipe 15 by the waste slurry preparation device 11 arranged above the second wellbore 3, so that the liquid waste 10 in the waste injection chamber 4 flows back to the energy storage chamber 6 through the second connecting channel 8, so that the energy storage chamber 6 lifts the reserve energy 12 in the energy storage chamber 6 to the third wellbore 5 through the critical plane 14, and the reserve energy 12 is discharged from the energy storage chamber 6 through the third wellbore 5, thereby completing the extraction and utilization of the reserve energy 12 in the energy storage chamber 6, as shown in FIG. Figure 5 shown.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0052] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A salt cavity structure, characterized in that: The invention comprises a waste disposal chamber, a waste perfusion chamber and an energy storage chamber, wherein the waste disposal chamber, the waste perfusion chamber and the energy storage chamber are all opened in the salt layer below the ground surface, and perfusion channels are opened between the waste disposal chamber, the waste perfusion chamber and the energy storage chamber and the ground surface, and the perfusion channel between the energy storage chamber and the ground surface is formed by a third wellbore, and the waste disposal chamber and the energy storage chamber are respectively arranged on both sides of the waste perfusion chamber, and the bottom of the energy storage chamber is located above the horizontal plane where the top of the waste perfusion chamber is located, and a first connecting channel is provided between the waste disposal chamber and the waste perfusion chamber, and the waste disposal chamber and the waste perfusion chamber are conductively connected through the first connecting channel, and a second connecting channel is provided between the waste perfusion chamber and the energy storage chamber, and one end of the second connecting channel is conductively connected to the top of the waste perfusion chamber, and the other end of the second connecting channel is conductively connected to the bottom of the energy storage chamber.

2. A salt chamber structure according to claim 1, characterized in that: The injection channel between the waste disposal chamber and the ground surface is composed of a first wellbore. A detachable chemical injection pipe is provided inside the first wellbore. The chemical injection pipe is inserted into the first wellbore. One end of the chemical injection pipe is located at the opening between the first wellbore and the ground surface, and the other end of the chemical injection pipe extends to the interior of the waste disposal chamber. An annular discharge gap is left between the outer wall of the chemical injection pipe and the inner wall of the first wellbore.

3. A salt chamber structure according to claim 1, characterized in that: The injection channel between the waste injection cavity and the ground surface is formed by a second wellbore, and a detachable waste slurry injection pipe is provided inside the second wellbore. One end of the waste slurry injection pipe is located at the opening between the second wellbore and the ground surface, and the other end of the waste slurry injection pipe extends to the interior of the waste injection cavity.

4. A salt chamber structure according to claim 3, characterized in that: A waste slurry preparation device is provided at one end of the waste slurry injection pipe located at the opening between the second wellbore and the ground surface, and waste slurry is injected into the waste injection cavity through the waste slurry preparation device via the waste slurry injection pipe.

5. A salt chamber structure according to any one of claims 1 to 4, characterized in that: The bottom of the waste disposal chamber and the bottom of the waste infusion chamber are on the same horizontal plane, one end of the first connecting channel is conductively connected to the bottom of the waste disposal chamber, and the other end of the first connecting channel is conductively connected to the bottom of the waste infusion chamber.

6. A method for waste disposal and energy storage using a salt cavity, characterized in that: According to a salt cavern structure according to any one of claims 1 to 5, wherein the perfusion channel between the waste disposal cavity and the ground surface is formed by a first wellbore, and the perfusion channel between the waste perfusion cavity and the ground surface is formed by a second wellbore, the implementation steps include: Step 1: Open a first wellbore, a second wellbore, a first connecting channel, construct a waste disposal cavity and a waste injection cavity, drill into the underground salt layer through horizontal well connection technology at positions above the waste disposal cavity and the waste injection cavity on the surface to obtain the first wellbore and the second wellbore, and use water solution mining technology to dissolve and construct the waste disposal cavity, the waste injection cavity and the first connecting channel respectively; Step 2: Open a third wellbore, a second connecting channel, and build an energy storage cavity. Use a horizontal directional well connection technology to build a third wellbore connecting the energy storage cavity and the surface at a position above the energy storage cavity on the surface. Use a backward dissolution mining technology to dissolve and build the energy storage cavity and the second connecting channel. Step three, installing a pipe column and a ground device in the wellbore, installing a reagent injection pipe inside the first wellbore obtained in step one, and putting waste treatment reagents into the waste disposal cavity through the reagent injection pipe, so that the waste treatment reagents fall into the waste disposal cavity, and the waste treatment reagents in the waste disposal cavity react with the liquid waste; installing a waste slurry injection pipe inside the second wellbore obtained in step one, and providing a waste slurry preparation device above the second wellbore, and injecting waste slurry into the waste perfusion cavity through the waste slurry preparation device through the waste slurry injection pipe; Step 4, liquid waste treatment and energy storage, through the waste slurry preparation device in step 3, the waste slurry is injected into the waste injection cavity through the waste slurry injection pipe, and the liquid waste in the waste injection cavity flows back into the waste disposal cavity through the first connecting channel obtained in step 1, until the original liquid material in the waste disposal cavity is completely emptied, at the same time, the reagent injection pipe in the first wellbore is opened to put the waste treatment reagent into the waste disposal cavity, so that the waste treatment reagent reduces or eliminates the toxicity and harmfulness of the liquid waste in the waste disposal cavity, and the energy material to be stored is injected into the energy storage cavity through the third wellbore obtained in step 2, and the energy material from the energy storage cavity discharges the liquid waste in the waste disposal cavity treated by the waste treatment reagent to the surface through the first wellbore, until the critical plane of incompatibility between the energy material stored in the energy storage cavity and the liquid waste is located at a distance of 3 to 5 m above the horizontal plane where the top of the second connecting channel is located, and the injection of energy material is stopped, the first wellbore is closed, and the third wellbore is closed, and the treatment of liquid waste and the storage of energy material are completed; Step five: extraction of energy materials. After the liquid waste in the waste disposal chamber is treated in step four, the third wellbore is opened, and the waste slurry is injected into the waste infusion chamber through the waste slurry injection pipe by the waste slurry preparation device in step three, so that the liquid waste in the waste infusion chamber flows back into the energy storage chamber through the second connecting channel obtained in step two, so that the energy storage chamber lifts the energy material stored in the energy storage chamber to the third wellbore through the critical plane, and the energy material is discharged to the surface through the third wellbore, thereby completing the extraction and utilization of the energy material in the energy storage chamber.

7. The method for waste disposal and energy storage using salt chambers according to claim 6 is characterized in that: The cross-sectional heights of the first connecting channel and the second connecting channel in step 1 and step 2 are greater than 8 m.

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