High-pressure servo control system and method for salt cavern sediment void energy storage simulation experiment

Abstract

The application discloses a high-pressure servo control system and method for a salt cavern sediment gap energy storage simulation experiment, comprising a high-pressure salt cavity simulation system, a gas-phase injection system and a liquid-phase injection system. The high-pressure salt cavity simulation system comprises a high-pressure cavity and a halogen discharge pipe connected to the high-pressure cavity through a communication pipe. Back pressure valves are arranged on the inlet and outlet pipelines of the high-pressure cavity. The high-pressure cavity sets a target pressure threshold through the back pressure valves to realize a high-pressure environment. The gas-phase injection system is used for injecting gas into the high-pressure salt cavity simulation system and comprises a gas-liquid separation tank and gas-phase injection halogen discharge pipelines and gas-phase halogen injection exhaust pipelines connected in parallel with the gas-liquid separation tank. The liquid-phase injection system is used for injecting liquid into the high-pressure salt cavity simulation system and comprises a water storage tank and liquid-phase injection halogen discharge pipelines and liquid-phase halogen injection exhaust pipelines connected in parallel with the water storage tank. The application can simulate a high-pressure brine environment in an actual salt cavity and realize alternating cycle control of gas injection and halogen injection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of salt cavern energy storage, and particularly relates to a high-pressure servo control system and method for salt cavern sediment gap energy storage simulation experiment. BACKGROUND

[0002] All salt cavern gas storage in China is built in stratified salt rock formed by lacustrine deposition, which has the characteristics of small salt layer thickness, many interlayers and high insoluble impurity content. The cavity formed after the salt layer is dissolved to form a cavity is buried by a large amount of insoluble sediment, and the effective volume of the gas storage is small. Using the sediment gap to store gas can solve the problem of insufficient effective gas storage volume of high-impurity salt mines.

[0003] The burial depth of a salt cavity is generally 1000 meters, and the brine column pressure of the brine in the cavity is about 10 MPa. However, the current sediment gap energy storage simulation experiment is carried out under low pressure (less than 1 MPa), which cannot truly simulate the high-pressure brine environment in the actual salt cavity.

[0004] During the actual gas injection and brine discharge process, clean water needs to be injected into the brine discharge well for backwashing at regular intervals to prevent crystallization and blockage of the brine discharge pipe or blockage of the sediment particles in the horizontal cavity, which leads to failure of the gas injection and brine discharge. This process needs to be alternately cycled through the processes of gas injection and brine discharge. However, the current sediment gap energy storage simulation experiment device cannot control the alternating cycle of the two processes. SUMMARY

[0005] To solve the above problems, the present application provides a high-pressure servo control system and method for salt cavern sediment gap energy storage simulation experiment, which can truly simulate the high-pressure brine environment in the actual salt cavity, realize the alternating cycle control of gas injection and brine discharge, fill the gap of the current salt cavity experiment simulation system, and the technical solution is as follows:

[0006] The first aspect of the present application provides a high-pressure servo control system for salt cavern sediment gap energy storage simulation experiment, which comprises a high-pressure salt cavity simulation system, a gas phase injection system and a liquid phase injection system. The high-pressure salt cavity simulation system comprises a high-pressure cavity and a brine discharge pipe connected to the high-pressure cavity through a communication pipe. Back pressure valves are respectively arranged on the inlet and outlet pipelines of the high-pressure cavity. The high-pressure cavity sets a target pressure threshold through the back pressure valves to realize a high-pressure environment. The gas phase injection system is used for injecting gas into the high-pressure salt cavity simulation system, and comprises a gas-liquid separation tank and gas phase gas injection and brine discharge pipelines and gas phase brine injection and gas discharge pipelines connected in parallel with the gas-liquid separation tank. The liquid phase injection system is used for injecting liquid into the high-pressure salt cavity simulation system, and comprises a water storage tank and liquid phase gas injection and brine discharge pipelines and liquid phase brine injection and gas discharge pipelines connected in parallel with the water storage tank.

[0007] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, a first liquid flow meter is arranged on the liquid-phase gas injection and halogen discharge pipeline, a plunger pump connected with the water storage tank, a PLC frequency converter, and a second liquid flow meter are arranged on the liquid-phase halogen injection and gas discharge pipeline. The PLC frequency converter is used to collect the value of the second liquid flow meter in real time, and sends a feedback signal to the plunger pump in real time to control the pumping rate of the plunger pump. The plunger pump is used to provide constant-flow high-pressure brine in the halogen injection and gas discharge process.

[0008] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, a gas cylinder and a first gas flow controller are arranged on the gas-phase gas injection and halogen discharge pipeline, and a second gas flow controller and a venting pipeline connected with the second gas flow controller are arranged on the gas-phase halogen injection and gas discharge pipeline. The first gas flow controller is used to control the injected gas to be injected into the high-pressure chamber at a given flow rate.

[0009] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, the communication pipeline is a variable-diameter pipeline, and the diameter of the variable-diameter pipeline gradually decreases along the direction from the high-pressure chamber to the halogen discharge pipeline. The variable-diameter pipeline is used to simulate the sand plug state of the sediment particles.

[0010] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, one end of the communication pipeline is connected with the bottom of the high-pressure chamber, and the communication pipeline is arranged horizontally, and the halogen discharge pipeline is arranged vertically.

[0011] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, a plurality of windows are arranged on the high-pressure chamber along the depth direction.

[0012] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, a brine pore pressure sensor is arranged on the high-pressure chamber along the depth direction to monitor the brine pore pressure in the sediment.

[0013] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, a pressure gauge is arranged on the high-pressure chamber inlet pipeline to monitor the pressure of the injected gas in real time, and a pressure gauge is arranged on the halogen discharge pipeline outlet pipeline to monitor the pressure of the discharged brine in real time.

[0014] For example, in the high-pressure servo control system of the salt cavern sediment interstice energy storage simulation experiment provided in an embodiment, high-pressure nitrogen is stored in the gas cylinder.

[0015] The second aspect of the application provides a high-pressure servo control method for a salt cavern sediment gap energy storage simulation experiment, which adopts the high-pressure servo control system for the salt cavern sediment gap energy storage simulation experiment, and comprises the following steps:

[0016] S1: preparing a high-impurity salt mine sediment sample; controlling the sediment particle gradation and layering the sediment particles to the high-pressure chamber;

[0017] S2: starting a liquid phase injection system, filling the high-pressure chamber with saturated brine, and enabling the saturated brine to flow out through a gas-liquid separation tank;

[0018] S3: setting a target threshold value of a high-pressure chamber inlet and outlet back pressure valve, starting a gas phase injection system, injecting nitrogen into the high-pressure chamber, and establishing a high-pressure brine environment;

[0019] S4: starting the liquid phase injection system, injecting the brine into the high-pressure chamber in a high-pressure servo control mode, and discharging the gas;

[0020] S5: closing the gas inlet switch and the brine inlet switch, opening the vent valve and the brine discharge switch, depressurizing the high-pressure chamber, and discharging the sediment to prepare for the next experimental process;

[0021] The S3 and the S4 are cyclically repeated, and the injection and discharge of the brine and the injection and discharge of the gas can be alternately cycled.

[0022] The high-pressure servo control system and method for the salt cavern sediment gap energy storage simulation experiment provided by some embodiments of the application have the following beneficial effects: the application can simulate the high-pressure brine environment in an actual salt chamber, realize the alternative cycle control of the injection and discharge of the brine and the injection and discharge of the gas, and fill the gap of the current salt chamber experimental simulation system; the real high-pressure servo environment makes the experimental data more accurate, the designed high-pressure chamber structure can withstand a pressure of 15 MPa or above, the back pressure valve is added to the inlet and outlet of the high-pressure chamber, the target threshold value is set, the high-pressure environment in the high-pressure chamber is realized, the designed servo control structure is adopted, the data of the PLC frequency converter is collected and fed back in real time, the injection rate of the plunger pump is controlled, the brine flow is controlled, and the purpose of high-pressure servo control injection is realized; the cycle of the injection and discharge of the brine and the injection and discharge of the gas makes the experimental process more reasonable, the electrical control gas phase injection and liquid phase injection valves are adopted, the two cycle processes of the injection and discharge of the brine and the injection and discharge of the gas can be dynamically switched, and the process is switched constantly, so that the alternative cycle control of the two processes of the injection and discharge of the brine and the injection and discharge of the gas can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0024] Figure 1 The high-pressure servo control system structure diagram for the salt cavern sediment gap energy storage simulation experiment of the present application;

[0025] Figure 2 The high-pressure servo control method flow chart for the salt cavern sediment gap energy storage simulation experiment of the present application. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0027] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood as the usual meanings understood by those of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and the like used in the present disclosure do not represent any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and the like mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and the like are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0028] The first aspect of the present application provides a high-pressure servo control system for a salt cavern sediment gap energy storage simulation experiment, such as Figure 1As shown, the high-pressure salt cavity simulation system 100, the gas phase injection system 200 and the liquid phase injection system 300, the high-pressure cavity simulation system 100 includes a high-pressure chamber 110 and a halogen discharge pipe 130 connected to the high-pressure chamber 110 through a communication pipe 120, a back pressure valve is arranged on the inlet and outlet pipe of the high-pressure chamber 110, specifically, a back pressure valve P2 is arranged on the outlet pipe of the halogen discharge pipe 130, a back pressure valve P1 is arranged on the inlet pipe of the high-pressure chamber 110, and the high-pressure chamber 110 realizes high-pressure environment by setting target pressure threshold value through the back pressure valve; the gas phase injection system 200 is used for injecting gas into the high-pressure salt cavity simulation system 100, including a gas-liquid separation tank 210 and a gas phase injection halogen discharge pipe 220 and a gas phase injection halogen exhaust pipe 230 connected in parallel with the gas-liquid separation tank 210 respectively; the liquid phase injection system 300 is used for injecting liquid into the high-pressure salt cavity simulation system 100, including a water storage tank 310 and a liquid phase injection halogen discharge pipe 320 and a liquid phase injection halogen exhaust pipe 330 connected in parallel with the water storage tank 310 respectively.

[0029] The high-pressure salt cavity simulation system 100 of the present application is used to simulate the change of gas-liquid interface and sediment state in high-pressure gas injection halogen discharge process, and the real high-pressure servo environment makes the experimental data more accurate. The designed high-pressure chamber 110 structure can withstand a pressure of 15 MPa or above, overcoming the defects of the existing sediment void energy storage simulation experiment which is carried out in a low pressure (less than 1 MPa) state and cannot truly simulate the high-pressure brine environment of the salt cavity in the field.

[0030] For example, in one embodiment provided by the high-pressure servo control system of the salt cave sediment void energy storage simulation experiment, as shown in Figure 1 As shown, the communication pipe 120 is a variable diameter pipe, and the diameter of the variable diameter pipe gradually decreases along the direction from the high-pressure chamber 110 to the halogen discharge pipe 130, and the variable diameter communication pipe 120 is used to simulate the sediment particle sand plugging state.

[0031] Among them, the variable diameter pipe 120 is arranged along the horizontal direction, one end is connected with the bottom of the high-pressure chamber 110, and the halogen discharge pipe 130 is arranged along the vertical direction.

[0032] According to the above embodiment, the high-pressure chamber 110 is used to simulate the change of gas-liquid interface and sediment state in the high-pressure gas injection and brine discharge process, the high-pressure chamber 110 sets a target pressure threshold by using a back pressure valve to realize a high-pressure environment, when the pressure in the high-pressure chamber 110 reaches the set target pressure threshold, the back pressure valve is automatically opened, and the brine in the chamber is discharged under the pushing action of the gas pressure; during the experiment, the high-pressure chamber 110 is layered filled with sediment particles, and the space between the particles is filled with brine, the pressure gauge on the inlet pipeline of the high-pressure chamber 110 monitors the injected gas pressure in real time, and the pressure gauge on the outlet pipeline of the brine discharge pipe 130 monitors the discharged brine pressure in real time. The high-pressure chamber 110 is provided with three windows 140 in the upper, middle and lower directions along the depth direction, so that the sediment particle migration in the high-pressure chamber 110 can be observed. The variable-diameter communication pipe 120 is used to simulate the sand plug state of the sediment particles, the variable-diameter pipe is used to gradually reduce the cross-sectional area to increase the brine discharge flow rate, and the bottom sediment particles are carried to simulate the particle migration and plugging phenomenon. The increase of the injected gas pressure reflects the occurrence of the sand plug of the sediment particles, and the flow rate of the discharged brine is monitored to analyze the starting flow rate of the sediment particles.

[0033] For example, in the high-pressure servo control system for the salt cavern sediment void energy storage simulation experiment provided in an embodiment, as shown in Figure 1 A first liquid flow meter 321 is arranged on the liquid-phase gas injection and brine discharge pipeline 320, a plunger pump 331 connected with the water storage tank 310, a PLC frequency converter 332 and a second liquid flow meter 333 are arranged on the liquid-phase brine injection and gas discharge pipeline 330, the PLC frequency converter 332 is used to collect the value of the second liquid flow meter 333 in real time, and sends a feedback signal to the plunger pump 331 in real time to control the pumping rate of the plunger pump 331, and the plunger pump 331 is used to provide high-pressure brine with constant flow rate in the brine injection and gas discharge process.

[0034] The first liquid flow meter 321 and the second liquid flow meter 333 are clamp-on flow meters.

[0035] According to the above embodiment, the high-precision metering plunger pump 331 provides high-pressure brine in the brine injection and gas discharge process, cooperates with the liquid flow meter and the PLC frequency converter 332 to provide brine with constant flow rate, and forms a high-pressure servo control structure; the PLC frequency converter 332 is used to collect the flow value of the liquid flow meter in real time, and sends a feedback signal to the plunger pump 331 in real time to control the pumping rate of the plunger pump 331, so as to achieve the purpose of controlling the brine injection rate, and realize high-pressure servo control injection.

[0036] For example, in the high-pressure servo control system for the salt cavern sediment void energy storage simulation experiment provided in an embodiment, as shown in Figure 1As shown, the gas cylinder 221 and the first gas flow controller 222 connected in parallel are arranged on the gas phase injection gas displacement brine pipeline 220, and the second gas flow controller 231 and the vent pipeline 232 connected with the second gas flow controller 231 are arranged on the gas phase injection brine displacement gas pipeline 230. The first gas flow controller 222 is used to control the injected gas to be injected into the high-pressure chamber 110 at a given flow rate.

[0037] The gas cylinder 221 stores high-pressure nitrogen gas.

[0038] According to the above embodiment, the nitrogen gas cylinder 221 provides pure high-pressure nitrogen gas for gas injection. The gas flow controller controls the injected nitrogen gas to be injected into the high-pressure chamber 110 at a given flow rate, achieving the purpose of controlling the gas injection rate. The gas-liquid separation tank 210 separates the liquid in the injected nitrogen gas or separates the liquid in the vented nitrogen gas, preventing the monitoring accuracy of the physical simulation system from being affected.

[0039] The high-pressure servo control system of the salt cavern sediment gap energy storage simulation experiment of the present application adopts electrically controlled valves of the gas phase injection system 200 and the liquid phase injection system 300, which can dynamically switch between the two circulation processes of gas injection brine displacement and brine injection gas displacement. Specifically, by closing the gas phase injection system 200 and opening the liquid phase injection system 300, the brine injection gas displacement experiment can be carried out through the high-pressure chamber 110 inlet and outlet pressure reducing valves after the chamber is pressure maintained. By constantly switching this process, the two processes of gas injection brine displacement and brine injection gas displacement can be alternately and cyclically carried out. The present application provides a simulation experiment system for the alternative and cyclic control of gas injection brine displacement and brine injection gas displacement, which fills the technical gap that the current indoor experiment device can simultaneously realize the simulation of the two situations.

[0040] For example, in one embodiment, the high-pressure servo control system of the salt cavern sediment gap energy storage simulation experiment provided by the present application is provided with a brine pore pressure sensor arranged along the depth direction of the low-pressure chamber 122 to monitor the brine pore pressure in the sediment.

[0041] The second aspect of the present application provides a salt cavern sediment gap energy storage simulation experiment method, which uses the above-mentioned high-pressure servo control system of the salt cavern sediment gap energy storage simulation experiment to carry out experiments, such as Figure 2 As shown, the method comprises the following steps:

[0042] S1: Prepare a high-impurity salt mine sediment sample; control the sediment particle gradation, and layer the sediment particles to the high-pressure chamber 110, specifically:

[0043] Open the high-pressure chamber 110 top cover, according to the average particle size of the sediment particles from small to large, the sediment particles are layered and stacked into the high-pressure chamber 110 until the sediment is stacked to 1 / 2-2 / 3 of the total height of the high-pressure chamber 110; Install different transition size reducing communication pipe 120 (for example, the pipe diameter transition size is DN100-DN100, DN100-DN50, DN100-DN25) to simulate the plugging phenomenon of the sediment particles in the horizontal reducing communication pipe 120;

[0044] S2 starts the liquid phase injection system 300, fills the high-pressure chamber 110 with saturated brine, so that the saturated brine can flow out through the gas-liquid separation tank 210, specifically:

[0045] By default, all valves are in the closed state, open HQ01, HQ02, ZF04, start the high-precision plunger pump 331, pump the brine into the high-pressure chamber 110 until the high-pressure chamber 110 and the brine discharge pipe 130 are completely filled with brine, and the brine can flow out through the gas-liquid separation tank 210;

[0046] S3 sets the target threshold value of the high-pressure chamber 110 inlet and outlet back pressure valve, starts the gas phase injection system 200, injects nitrogen into the high-pressure chamber 110 to establish a high-pressure brine environment, specifically:

[0047] Set the back pressure valve P1 pressure to the target setting value 8MPa. For the high-pressure chamber 110 inlet and outlet pressure gauges P1, P2, set the data sampling frequency to 1 second or 2 seconds; For the first gas flow controller 222, the second gas flow controller 231, the first liquid flow meter 321 and the second liquid flow meter 333, set the data sampling frequency to 1 second or 2 seconds, complete the preparation work of various monitoring instruments;

[0048] Slowly open the nitrogen cylinder switch K1, inject nitrogen into the high-pressure chamber 110, the gas passes through the gas-liquid separation tank 210, discharges the liquid that may be carried in the gas, and the gas enters the high-pressure chamber 110. After the pressure in the high-pressure chamber 110 reaches the set pressure value 8MPa, the back pressure valve P2 automatically opens, and the brine in the chamber is pushed by the gas pressure and enters the water storage tank 310 through the brine discharge pipe 130, switch HQ01, HQ03 and first liquid flow meter 321, complete the gas injection and brine discharge simulation experiment in the sediment;

[0049] S4 first stops S3, closes the gas inlet switch K1, QD01, closes the brine discharge switch HQ03, opens the switch HQ02, starts the high-precision plunger pump 331, sets the target value of the second liquid flow meter 333 to control the injection rate of the plunger pump 331, and injects the brine into the vertical brine discharge pipe 130 at a uniform speed. After the brine pressure reaches the target pressure value set by the needle valve ZF04, the gas passes through the second gas flow controller 231 and then enters the vent line 232 to vent.

[0050] Wherein, the S3 and S4 can be circulated back and forth, by performing the switching operation function in step S3 and step S4, the injection of brine exhaust and injection of gas exhaust brine simulation experiment process can be alternately circulated.

[0051] S5 closes the inlet switch and the inlet switch, opens the vent valve and the exhaust switch, depressurizes the high-pressure chamber, discharges the sediment and prepares for the next experiment process, specifically, after the experiment, close the inlet switch QD01, close the exhaust switch HQ03, open the exhaust needle valve ZF04, discharge the gas in the chamber, open the exhaust switch LQ01 to discharge the remaining brine in the high-pressure chamber 110, open the chamber top cover to replace different sediment particles, refill the sample and perform the experiment.

[0052] All the data in the experiment process are recorded by the monitoring instrument; the data in the experiment process can be exported and processed in other drawing software, and the experiment is ended.

[0053] The high-pressure servo control system and method of the salt cavern sediment void energy storage simulation experiment of the application can simulate the high-pressure brine environment in the actual salt chamber and realize the alternative circulation control of the injection of gas exhaust and the injection of brine exhaust.

[0054] Although the embodiments of the application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, it can be fully applied to various fields suitable for the application, and other modifications can be easily realized by those skilled in the art, therefore, the application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A high-pressure servo control system for a salt cavern sediment gap energy storage simulation experiment, characterized in that, include: A high-pressure brine chamber simulation system includes a high-pressure chamber and a brine discharge pipe connected to the high-pressure chamber via a connecting pipe. Back pressure valves are respectively installed on the inlet and outlet pipes of the high-pressure chamber. The high-pressure chamber achieves a high-pressure environment by setting a target pressure threshold through the back pressure valves. A gas phase injection system for injecting gas into the high-pressure salt chamber simulation system includes a gas-liquid separator and a gas phase gas injection and brine discharge pipeline and a gas phase brine injection and exhaust pipeline respectively connected in parallel with the gas-liquid separator. A liquid phase injection system is used to inject liquid into the high-pressure salt chamber simulation system, including a water storage tank and a liquid phase gas injection and brine discharge pipeline and a liquid phase brine injection and exhaust pipeline respectively connected in parallel with the water storage tank; The connecting pipe is a variable diameter pipe, and the diameter of the variable diameter pipe gradually decreases along the direction from the high-pressure chamber to the brine discharge pipe. The variable diameter pipe is used to simulate the state of sand blockage by sediment particles. One end of the connecting pipe is connected to the bottom of the high-pressure chamber. The connecting pipe is arranged horizontally, and the brine discharge pipe is arranged vertically.

2. The high-pressure servo control system for the salt caverns' sedimentation gap energy storage simulation experiment according to claim 1, characterized in that, A first liquid flow meter is installed on the liquid phase gas injection and brine discharge pipeline. A plunger pump, a PLC frequency converter, and a second liquid flow meter are installed on the liquid phase brine injection and exhaust pipeline connected to the water storage tank. The PLC frequency converter is used to collect the value of the second liquid flow meter in real time and control the pumping rate of the plunger pump by sending a feedback signal to the plunger pump in real time. The plunger pump is used to provide high-pressure brine with a constant flow rate during the brine injection and exhaust process.

3. The high-pressure servo control system for the simulation experiment of the salt caverns energy storage with sedimentation gap according to claim 1, characterized in that, A gas cylinder and a first gas flow controller are provided on the gas phase injection and effluent discharge pipeline. A second gas flow controller and a venting pipeline connected to the second gas flow controller are provided on the gas phase injection and effluent discharge pipeline. The first gas flow controller is used to control the injected gas to be injected into the high-pressure chamber at a given flow rate.

4. The high-pressure servo control system for the simulation experiment of the salt caverns energy storage with sedimentation gap according to claim 1, characterized in that, Several viewing windows are opened along the depth direction in the high-pressure chamber.

5. The high pressure servo control system for the simulation experiment of the salt caverns energy storage with sedimentation gap according to claim 1, characterized in that, A brine pore pressure sensor is installed along the depth direction in the high-pressure chamber to monitor the brine pore pressure in the sediment.

6. The high pressure servo control system for the simulation experiment of the salt caverns energy storage with sedimentation gap according to claim 1, characterized in that, A pressure gauge is installed on the inlet pipe of the high-pressure chamber to monitor the pressure of the injected gas in real time, and a pressure gauge is installed on the outlet pipe of the brine discharge pipe to monitor the pressure of the discharged brine in real time.

7. The high pressure servo control system for the simulation experiment of the energy storage in the salt caverns' sedimentation gap according to claim 3, characterized in that, The gas cylinder contains high-pressure nitrogen.

8. The method of claim 1-7, wherein the high pressure servo control system for the simulation experiment of the salt caverns energy storage with sedimentation gap is characterized in that, Includes the following steps: S1. Prepare high-impurity salt ore sediment samples; control the particle size distribution of the sediment and stack the sediment particles in layers into the high-pressure chamber. S2 starts the liquid phase injection system, filling the high-pressure chamber with saturated brine, allowing the saturated brine to flow out through the gas-liquid separator. S3 sets the target threshold for the back pressure valves at the inlet and outlet of the high-pressure chamber, starts the gas phase injection system, injects nitrogen into the high-pressure chamber, and establishes a high-pressure brine environment; S4 starts the liquid phase injection system, injecting brine into the high-pressure chamber in a high-pressure servo control mode and venting gas. S5 closes the air inlet switch and brine inlet switch, opens the vent valve and brine discharge switch to depressurize the high-pressure chamber and discharge the sediment in preparation for the next experimental process; S3 and S4 are repeated in a cycle, which can be used to perform alternating cycles of brine injection and venting and brine injection and venting simulation experiments.

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