Gas purification device and method in compressed air energy storage

Abstract

The present application provides a gas purification device and method in compressed air energy storage, wherein the gas purification device in the compressed air energy storage comprises: a working chamber provided with a first end and a second end, the first end is provided with a gas inlet for the compressed gas in the underground salt cavity to flow into the working chamber, and the second end is provided with: a gas outlet for the purified gas in the working chamber to flow out; an adjustable guide grid, provided on the air inlet side of the working chamber, for uniformly and directionally treating the compressed gas in the underground salt cavity flowing into the working chamber; an electrostatic adsorption plate, provided on the bottom of the working chamber, for adsorbing the salt slag and salt dust of the compressed gas in the underground salt cavity flowing into the working chamber; a slag discharge port, provided on the air outlet side of the working chamber, close to the electrostatic adsorption plate, and the working chamber can be a cylindrical working chamber. The above scheme achieves the effect of efficiently removing the salt slag and salt dust of the compressed gas in the underground salt cavity flowing through.

Description

Technical Field

[0001] The present application belongs to the technical field of compressed air energy storage, and in particular, relates to a gas purification device and method in compressed air energy storage. Background Art

[0002] Renewable clean energy is the trend of energy development. Compressed air energy storage is an important form of energy storage and another technology suitable for large-scale power energy storage after pumped storage. In addition to the advantages of high energy storage, compressed air energy storage also has the advantages of high energy density, high power density, low operating cost and long service life. Compressed air energy storage technology mainly includes: traditional compressed air energy storage, adiabatic compressed air energy storage, isothermal compressed air energy storage, cryogenic compressed air energy storage, supercritical compressed air energy storage, etc. Among them, adiabatic compressed air storage is widely used. Taking the storage of electric energy as an example, the compressed air energy storage system can be mainly divided into two basic working processes: energy storage and energy release. When storing energy, the motor drives the compressor to absorb air from the environment, compress it to a high pressure state and store it in the gas storage reservoir. The electric energy is converted into the internal energy of the compressed air in this process; when releasing energy, the compressed air stored in the gas storage device enters the air turbine to expand and generate power, and the internal energy and potential energy contained in the compressed air are converted back into electric energy.

[0003] Salt cavern compressed air energy storage is a compressed air energy storage method, which refers to the use of electrical energy to compress air and store it in underground salt caverns during the low load period of the power grid, and release the compressed air in the underground salt caverns to drive air turbines to generate electricity during the peak load period of the power grid. Under the power generation condition of this energy storage method, high-pressure gas flows from the underground salt caverns through pipelines at high speed to the ground power station. Due to the presence of sediment in the underground salt caverns and the generation of new sediment due to collapse during operation, the high-speed gas may carry the sediment into the pipeline. Solid sediment is very destructive to high-speed rotating air turbines, which can easily cause problems such as blade damage.

[0004] There is no effective solution to the problem that the slag entrainment phenomenon in the existing salt cavern compressed air energy storage system affects the operating safety and efficiency of the unit. Summary of the invention

[0005] The purpose of the present application is to provide a gas purification device and method in compressed air energy storage, which can efficiently remove salt residue and salt dust from the compressed gas flowing through an underground salt cavity.

[0006] The present application provides a gas purification device and method in compressed air energy storage, which is implemented as follows:

[0007] A gas purification device in a compressed air energy storage, comprising:

[0008] A working chamber having a first end and a second end, wherein the first end is provided with a gas inlet for compressed gas in the underground salt chamber to flow into the working chamber, and the second end is provided with a gas outlet for purified gas in the working chamber to flow out;

[0009] An adjustable guide grid is arranged at the air inlet side of the working chamber, and is used to uniformly and directionally process the compressed gas in the underground salt cavity flowing into the working chamber;

[0010] An electrostatic adsorption plate is arranged at the bottom of the working chamber and is used to adsorb salt slag and salt dust of the compressed gas flowing into the underground salt cavity of the working chamber;

[0011] The slag discharge port is arranged at the gas outlet side inside the working chamber and close to the electrostatic adsorption plate, wherein the working chamber is a cylindrical working chamber.

[0012] In one embodiment, the gas purification device in the above-mentioned compressed air energy storage may also include: a flow meter and a measurement and control system, wherein: the flow meter is arranged at the gas inlet, for detecting the flow rate of the compressed gas in the underground salt cavity flowing into the working cavity, and sending the detected flow rate data to the measurement and control system; the measurement and control system is used to adjust the angle of the adjustable guide grid according to the flow rate data.

[0013] In one embodiment, the gas purification device in the above-mentioned compressed air energy storage may also include: a hydraulic cylinder, connected to the measurement and control system; a transmission mechanism, connected to the hydraulic cylinder and the adjustable guide fence, and the measurement and control system adjusts the stroke of the hydraulic cylinder to drive the transmission mechanism to move, so as to achieve angle adjustment of the adjustable guide fence.

[0014] In one embodiment, the gas purification device in the above-mentioned compressed air energy storage may also include: a weighing sensor, arranged under the electrostatic adsorption plate, for weighing the salt slag and salt dust adsorbed by the electrostatic adsorption plate, and sending a trigger signal to the measurement and control system when the weighing value reaches a preset threshold; the measurement and control system is used to adjust the adjustable guide grid to a slag discharge condition in response to the trigger signal, so as to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

[0015] In one embodiment, the gas inlet arranged at the first end includes: a first air inlet and a second air inlet, and correspondingly, the flow meter includes: a first flow meter and a second flow meter, wherein the first flow meter is arranged on the first air inlet, and the second flow meter is arranged on the second air inlet, and the first air inlet and the second air inlet are arranged horizontally and parallelly.

[0016] In one embodiment, the adjustable guide fence is an airfoil guide fence, the cross section of the airfoil guide fence is an airfoil, and the overall shape is an arc.

[0017] A method for purifying gas based on the above-mentioned gas purification device in compressed air energy storage comprises:

[0018] In the case of delivering compressed gas in the underground salt cavity to the gas purification device, obtaining a gas flow rate at a gas inlet in the gas purification device;

[0019] According to the gas flow rate, determining the angle of the adjustable guide grid as a target angle;

[0020] Controlling the adjustable guide fence to rotate to the target angle;

[0021] The compressed gas in the underground salt cavity is controlled to flow through the adjustable guide grid, and the salt residue and salt dust of the compressed gas are adsorbed by the electrostatic adsorption plate to obtain purified gas and output it.

[0022] In one embodiment, determining the angle of the adjustable guide grid according to the gas flow rate includes:

[0023] The angle of the adjustable guide grid is calculated according to the following formula:

[0024]

[0025] Wherein, θ represents the angle of the adjustable guide grid, C represents the length of the working cavity, and D0 represents the inner diameter of the working cavity;

[0026] in:

[0027]

[0028] Wherein, V1 represents the flow rate of the first air inlet, V2 represents the flow rate of the second air inlet, and D m Indicates the diameter of the first and second air inlets.

[0029] In one embodiment, the adjustable guide fence is an airfoil guide fence, the cross section of the airfoil guide fence is an airfoil, and the overall shape is an arc. The arc radius of the adjustable guide fence is determined according to the following formula:

[0030]

[0031] Among them, R b represents the arc radius of the adjustable guide grid, α=2β, where β is the angle between the normal line of the airfoil end surface and the bearing tangent line, R represents the radius of the working cavity, and L represents the distance from the intersection of the airfoil midline of the airfoil guide grid and the longitudinal section of the working cavity to the top of the working cavity.

[0032] In one embodiment, the process of controlling the compressed gas in the underground salt cavity to flow through the adjustable guide grid and adsorbing salt slag and salt dust of the compressed gas through the electrostatic adsorption plate also includes:

[0033] Receive a trigger signal sent by a weighing sensor when the weighing value reaches a preset threshold;

[0034] In response to the trigger signal, the adjustable guide grid is adjusted to a slag discharge condition to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

[0035] An electronic device comprises a processor and a memory for storing instructions executable by the processor, wherein the processor executes the steps of the above method when executing the instructions.

[0036] A computer-readable storage medium stores a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0037] The gas purification device and method in the compressed air energy storage provided by the present application, by setting a gas inlet, a gas outlet, an adjustable guide grid and an electrostatic adsorption plate, can uniformly and directionally treat the compressed gas in the underground salt cavity flowing into the working cavity and adsorb the salt slag and salt dust of the compressed gas in the underground salt cavity flowing into the working cavity. The above scheme solves the problem that the slag entrainment phenomenon in the existing salt cavern compressed air energy storage system affects the operating safety and efficiency of the unit, and achieves the technical effect of efficiently removing the salt slag and salt dust of the compressed gas in the underground salt cavity flowing through. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a structural schematic diagram of an embodiment of a gas purification device in a compressed air energy storage provided by the present application;

[0040] Figure 2 It is a structural block diagram and method signal flow diagram of a gas purification device in a compressed air energy storage provided by the present application;

[0041] Figure 3 It is a front view of the flow guide mechanism in the gas purification device in the compressed air energy storage provided by the present application;

[0042] Figure 4It is a side view of the flow guide mechanism in the gas purification device in the compressed air energy storage provided by the present application;

[0043] Figure 5 It is a schematic diagram of the angle adjustment of the airfoil guide fence provided in the present application;

[0044] Figure 6 It is a schematic diagram of determining the arc angle of the airfoil guide grid provided in the present application;

[0045] Figure 7 This is a method flow chart of an embodiment of a purification method based on a gas purification device in a compressed air energy storage provided by the present application;

[0046] Figure 8 It is a hardware structure block diagram of an electronic device for a purification method of a gas purification device in a compressed air energy storage provided by the present application;

[0047] Fig. 9 It is a schematic diagram of the module structure of an embodiment of a purification device based on a gas purification device in compressed air energy storage provided in the present application. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0049] Considering that there are sediments in underground salt cavities and new sediments are generated due to collapse during operation, high-speed gas may carry sediments into the pipeline. Solid sediments are very destructive to high-speed rotating air turbines, which can easily cause problems such as blade damage. In addition, in the form of multi-salt cavern gas storage, due to the different depths of salt caverns and the resistance coefficients of the gas transmission system, there are differences in the exhaust speed and air pressure of different salt cavern gas storage cavities, which will affect the stable operation of the generator set.

[0050] For industrial dust removal, gravity sedimentation, centrifugal separation, filtration (T-method), liquid washing (wet method), electrostatics, sound waves and ultrasound can be used. However, since air turbines have requirements for gas humidity, liquid washing cannot be used; since centrifugal separation, electrostatics and sound waves require the gas to be still or slow, they cannot be applied to compressed air energy storage. Gravity sedimentation only has a sedimentation effect on large solid impurities, and has no obvious effect on micro salt dust. There is no effective way to remove slag from high-speed and high-pressure air containing salt slag and salt dust of different sizes, that is, there is no effective way to remove slag, dust, convergence and pressure stabilization of salt cavern compressed air energy storage power generation gas. The slag and liquid entrainment phenomenon of the compressed air energy storage system affects the operating safety and efficiency of the unit, and the existing slag and liquid removal methods cannot meet the requirements of the compressed storage system.

[0051] At present, the problem of air slag entrainment at the inlet of air turbines is generally solved by adding a filter at the inlet. However, if the mesh number of the filter is too low, the filtering effect cannot be achieved, and if the mesh number is too high, the gas flow resistance will be increased. Long-term blockage of the filter and accumulation of sediment in front of the filter will also increase the gas flow resistance.

[0052] In this example, in order to solve the slag problem of high-pressure and high-speed power generation gas working fluid in salt cavern compressed air energy storage power station, a gas purification device and method for compressed air energy storage of salt cavern gas are proposed, wherein the gas purification device in the compressed air energy storage comprises: a working chamber, comprising a first end and a second end, the first end is provided with: a first gas inlet and a second gas inlet, and the second end is provided with: a gas outlet; an adjustable guide grid is provided on the air inlet side inside the working chamber, an electrostatic adsorption plate is arranged at the bottom of the working chamber, and a slag discharge port is provided on the outlet side of the working chamber near the electrostatic adsorption plate, wherein the working chamber can be a cylindrical working chamber. After entering the working chamber, the slag-carrying gas has a reduced flow velocity under the action of the guide grid, and the salt slag and salt dust in the slag-carrying gas fall on the electrostatic adsorption plate, and the purified air flows out through the outlet.

[0053] The gas purification device can improve the quality of power generation gas in compressed air energy storage, reduce pipeline pressure resistance, and improve power generation efficiency and safety.

[0054] Specifically, in this example, a gas purification device is provided, such as Figure 1As shown, when the system is working, high-pressure and high-speed gas enters the working chamber from the inlet 1, and its speed is evenly distributed and reduced in the working chamber 3 through the airfoil guide grid 2. The velocity meter 10 measures the gas velocity at the inlet 1. The measurement and control system 7 adjusts the angle of the airfoil guide grid 2 by controlling the hydraulic cylinder and the transmission mechanism 4 according to the velocity measured by the velocity meter 10 to meet the requirements of different inlet flow velocities. The airfoil guide grid 2 adjusts the angle under the control of the hydraulic cylinder and the transmission mechanism 4 to adjust the working condition. The salt slag and salt dust in the gas fall onto the electrostatic adsorption plate 5 under the action of gravity and static electricity. Among them, a weight sensor 6 can be provided under the electrostatic adsorption plate 5, and the weight data is obtained by measuring the weight sensor 6. The weight data is transmitted to the measurement and control system 7. The measurement and control system 7 adjusts the angle of the airfoil guide grid 2 by controlling the hydraulic cylinder and the transmission mechanism 4 according to the flow measured by the air flow meter 10 to switch the device working condition to the slag discharge working condition. The salt slag adsorbed on the electrostatic adsorption plate 5 is discharged from the device through the slag discharge port 8, and the gas after slag removal and confluence leaves the device through the outlet 6.

[0055] like Figure 2 As shown, the weight signal of the weighing sensor and the flow signal of the flow meter are transmitted to the measurement and control system, and the measurement and control system sends a control signal to adjust the stroke of the hydraulic cylinder, and then adjust the angle of the airfoil guide grid, thereby adjusting the flow velocity distribution and switching working conditions.

[0056] The front view of the guide mechanism can be as follows Figure 3 As shown, the side view can be Figure 4 As shown in the figure, the guide mechanism includes: measurement and control system, hydraulic cylinder, transmission mechanism, airfoil guide fence and auxiliary accessories such as bearings. Among them, the cross section of the airfoil guide fence is airfoil-shaped to achieve the effect of reducing wind resistance. The overall shape of the airfoil guide fence is arc-shaped, which can guide the inflowing gas to both sides of the flow direction, thereby ensuring that the flow velocity on the left and right sides of the tank is evenly distributed. Figure 3 As shown in the figure, the arrow direction is the direction of gas force. By adjusting the angle of the airfoil guide plate, the airflow can be evenly distributed above and below the tank. Figure 4 As shown in the figure, the arrow direction is the rotation direction of the airfoil guide plate. Figure 5 As shown, under the slag discharge condition, the angle of the airfoil guide grid points to the electrostatic adsorption plate, and the high-speed fluid flows toward the electrostatic adsorption plate, forming high pressure at the adsorption plate, blowing up the salt slag and salt dust, and discharging the salt slag and salt dust through the slag discharge port 8.

[0057] Among them, the airfoil guide fence pitch angle θ can be calculated as follows:

[0058] The air flow meter measures the air flow rates V1 and V2, and according to the inlet pipe diameter D m and the inner diameter D0 of the working chamber determine the horizontal flow velocity V h :

[0059]

[0060] Assuming the total length of the working tank is C, the blade angle is calculated based on the horizontal velocity:

[0061]

[0062] Furthermore, the airfoil guide fence 2 is designed to be arc-shaped along the blade span direction, and the measurement and control system 7 can calculate the arc R in the following manner: b :

[0063] like Figure 6 As shown, the intersection point P of the centerline of the airfoil in the airfoil guide grid and the centerline of the tank body corresponds to the elevation of the centerline of the inlet pipe. The intake airflow is perpendicular to the airfoil guide grid. Due to the arc shape of the airfoil guide grid, the airflow deviates to both sides, and the airflow exit direction is the tangent direction of the tank wall. The incident angle and the exit angle are both β, α = 2β, so the angle between the airfoil end face normal and the bearing tangent is β, and the airfoil arc radius R b for:

[0064]

[0065] Among them, R b represents the arc radius of the adjustable guide grid, α=2β, where β is the angle between the normal line of the airfoil end surface and the bearing tangent line, R represents the radius of the working cavity, and L represents the distance from the intersection of the airfoil midline of the airfoil guide grid and the longitudinal section of the working cavity to the top of the working cavity.

[0066] In the above example, a device and method for solid separation, convergence and pressure stabilization of salt cavern gas are provided, which can reduce the slag content in the power generation gas on the basis of the existing compressed air energy storage system, thereby effectively improving the safety and stability of the air turbine operation. Furthermore, through the use of adjustable blades, the angle under different flow rates can be adjusted to improve the uniformity of the gas flow rate distribution, and automatic control can be achieved through the measurement and control of the adsorption plate and the guide grid. Furthermore, because the airfoil guide plate adopts an arc design, the uniformity of the gas distribution in the tank can be improved. The automatic discharge of salt slag and salt dust can be achieved by switching the guide mechanism, which improves the automation level of system maintenance.

[0067] In an embodiment of the present application, a gas purification device in a compressed air energy storage is provided, which may include:

[0068] 1) A working chamber having a first end and a second end, wherein the first end is provided with a gas inlet for compressed gas in the underground salt chamber to flow into the working chamber, and the second end is provided with a gas outlet for purified gas in the working chamber to flow out;

[0069] 2) an adjustable guide grid, arranged at the air inlet side of the working chamber, for uniformly and directionally treating the compressed gas in the underground salt cavity flowing into the working chamber;

[0070] 3) an electrostatic adsorption plate, arranged at the bottom of the working chamber, for adsorbing salt residue and salt dust of the compressed gas flowing into the underground salt chamber of the working chamber;

[0071] 4) A slag discharge port is arranged at the gas outlet side inside the working chamber and at a position close to the electrostatic adsorption plate, wherein the working chamber can be a cylindrical working chamber.

[0072] That is, by setting the electrostatic adsorption plate, the salt slag and salt dust in the gas can be adsorbed, and by the adjustable guide grid, the gas can be uniformly and directionally treated. Furthermore, by setting the slag discharge port, the adsorbed salt slag and salt dust can be discharged in time, so that the gas purification device can be used all the time, avoiding frequent replacement of the gas purification device.

[0073] Because the adjustable guide grid can achieve uniform and directional treatment of the gas flowing through, it is necessary to adjust the angle of the adjustable guide grid based on the gas flow rate. In order to achieve automatic control of the adjustable guide grid, it can be controlled by a measurement and control system, and the flow rate of the gas inlet is detected by setting a flow meter. Based on this, in one embodiment, the gas purification device in the compressed air energy storage can also include: a flow meter and a measurement and control system, wherein: the flow meter is set at the gas inlet, which is used to detect the flow rate of the compressed gas in the underground salt cavity flowing into the working cavity, and the detected flow rate data is sent to the measurement and control system; the measurement and control system is used to adjust the angle of the adjustable guide grid according to the flow rate data.

[0074] Considering that it is difficult to transport gas with a single air inlet, in this example, the number of air inlets is 2, that is, the gas inlet set at the first end includes: a first air inlet and a second air inlet, and correspondingly, the flow meter includes: a first flow meter and a second flow meter, wherein the first flow meter is set on the first air inlet, and the second flow meter is set on the second air inlet, and the first air inlet and the second air inlet are set horizontally and parallel. Based on this, the first flow meter and the second flow meter will measure a flow rate data. Based on the flow rate data, the measurement and control system can calculate the angle of the adjustable guide grid according to the following formula:

[0075]

[0076] Wherein, θ represents the angle of the adjustable guide grid, C represents the length of the working cavity, and D0 represents the inner diameter of the working cavity;

[0077] in:

[0078]

[0079] Wherein, V1 represents the flow rate of the first air inlet, V2 represents the flow rate of the second air inlet, and D m Indicates the diameter of the first and second air inlets.

[0080] The gas purification device in the above-mentioned compressed air energy storage may also include: a hydraulic cylinder, connected to the measurement and control system; a transmission mechanism, connected to the hydraulic cylinder and the adjustable guide grid, and the measurement and control system adjusts the stroke of the hydraulic cylinder to drive the transmission mechanism to move, so as to achieve angle adjustment of the adjustable guide grid.

[0081] That is, the angle adjustment of the adjustable guide fence is achieved through auxiliary accessories such as the measurement and control system, hydraulic cylinder, transmission mechanism, airfoil guide fence and bearings. Among them, the cross-section of the airfoil guide fence can be an airfoil to achieve the effect of reducing wind resistance. The overall shape of the airfoil guide fence is arc-shaped, which can guide the incoming gas to both sides of the flow direction, thereby ensuring that the flow velocity on the left and right sides of the tank is evenly distributed. By adjusting the angle of the airfoil guide plate, the airflow can be evenly distributed above and below the tank. Under the slag discharge condition, the angle of the airfoil guide fence points to the electrostatic adsorption plate, and the high-speed fluid flows to the electrostatic adsorption plate, forming high pressure at the adsorption plate, blowing up the salt slag and salt dust, and discharging the salt slag and salt dust through the slag discharge port.

[0082] In one embodiment, the gas purification device in the above-mentioned compressed air energy storage may also include: a weighing sensor, arranged below the electrostatic adsorption plate, for weighing the salt slag and salt dust adsorbed by the electrostatic adsorption plate, and sending a trigger signal to the measurement and control system when the weighing value reaches a preset threshold; a measurement and control system, for adjusting the adjustable guide grid to a slag discharge condition in response to the trigger signal, so as to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

[0083] That is, a weighing sensor can be provided under the electrostatic adsorption plate, and the weight data is obtained by measuring the weight sensor. The weight data is transmitted to the measurement and control system, and the measurement and control system switches the device working condition to the slag discharge working condition by controlling the hydraulic cylinder and the transmission mechanism to adjust the angle of the airfoil guide grid according to the flow measured by the air flow meter, and the salt slag adsorbed on the electrostatic adsorption plate is discharged from the device through the slag discharge port.

[0084] Based on the above-mentioned gas purification device in the compressed air energy storage, a purification method is also provided in this example, including:

[0085] Figure 7It is a method flow chart of an embodiment of a purification method based on a gas purification device in compressed air energy storage provided by the present application. Although the present application provides method operation steps or device structures as shown in the following embodiments or drawings, more or fewer operation steps or module units may be included in the method or device based on routine or no creative labor. In the steps or structures where there is no necessary causal relationship logically, the execution order of these steps or the module structure of the device is not limited to the execution order or module structure described in the embodiments of the present application and shown in the drawings. When the method or module structure described is applied to an actual device or terminal product, it can be connected according to the method or module structure shown in the embodiment or drawings for sequential execution or parallel execution (for example, a parallel processor or a multi-threaded processing environment, or even a distributed processing environment).

[0086] Specifically, Figure 7 As shown, the above-mentioned purification method based on the gas purification device in the compressed air energy storage may include the following steps:

[0087] Step 701: When the compressed gas in the underground salt cavity is transported to the gas purification device, the gas flow rate of the gas inlet in the gas purification device is obtained;

[0088] Step 702: determining the angle of the adjustable guide grid as a target angle according to the gas flow rate;

[0089] Step 703: Control the adjustable guide fence to rotate to the target angle;

[0090] Step 704: Control the compressed gas in the underground salt cavity to flow through the adjustable guide grid, and adsorb salt residue and salt dust in the compressed gas through the electrostatic adsorption plate to obtain purified gas and output it.

[0091] In the above step 702, according to the gas flow rate, the angle of the adjustable guide grid can be determined according to the following formula:

[0092]

[0093] Wherein, θ represents the angle of the adjustable guide grid, C represents the length of the working cavity, and D0 represents the inner diameter of the working cavity;

[0094] in:

[0095]

[0096] Wherein, V1 represents the flow rate of the first air inlet, V2 represents the flow rate of the second air inlet, and D m Indicates the diameter of the first and second air inlets.

[0097] The cross-section of the above-mentioned airfoil guide grid can be airfoil-shaped to achieve the effect of reducing wind resistance. The overall shape of the airfoil guide grid is arc-shaped, which can guide the incoming gas to both sides of the flow direction, thereby ensuring that the flow velocity on the left and right sides of the tank is evenly distributed. By adjusting the angle of the airfoil guide plate, the airflow can be evenly distributed above and below the tank. Under slag discharge conditions, the angle of the airfoil guide grid points to the electrostatic adsorption plate, and the high-speed fluid flows toward the electrostatic adsorption plate, forming high pressure at the adsorption plate, blowing up the salt slag and salt dust, and discharging the salt slag and salt dust through the slag discharge port. Among them, the arc radius of the adjustable guide grid can be determined according to the following formula:

[0098]

[0099] Among them, R b represents the arc radius of the adjustable guide grid, α=2β, where β is the angle between the normal line of the airfoil end surface and the bearing tangent line, R represents the radius of the working cavity, and L represents the distance from the intersection of the airfoil midline of the airfoil guide grid and the longitudinal section of the working cavity to the top of the working cavity.

[0100] In order to effectively reuse the purification device, a weighing sensor can be set under the electrostatic adsorption plate, and the salt slag and salt dust adsorbed by the electrostatic adsorption plate can be weighed by the weighing sensor, and when the weighing value reaches a preset threshold, a trigger signal is sent to the measurement and control system; the measurement and control system is used to adjust the adjustable guide grid to the slag discharge condition in response to the trigger signal. Under the slag discharge condition, the angle of the airfoil guide grid points to the electrostatic adsorption plate, and the high-speed fluid flows to the electrostatic adsorption plate, forming a high pressure at the adsorption plate, blowing up the salt slag and salt dust, and discharging the salt slag and salt dust through the slag discharge port. In one embodiment, the process of controlling the compressed gas in the underground salt cavity to flow through the adjustable guide grid and adsorbing the salt slag and salt dust of the compressed gas through the electrostatic adsorption plate also includes: receiving a trigger signal sent by the weighing sensor when the weighing value reaches a preset threshold; in response to the trigger signal, adjusting the adjustable guide grid to the slag discharge condition to discharge the salt slag and salt dust on the electrostatic adsorption plate through the slag discharge port.

[0101] In the above example, the expansion cavity is used to reduce the flow rate to achieve the sedimentation of impurities in the high-speed fluid of the compressed air energy storage system. The flow rate of the imported high-speed fluid in the expansion cavity is reduced by 90%, the slag and dust entrainment capacity is reduced, and the impurities fall under the action of gravity. The removal of electrolyte particles in the gas is achieved by electrostatic adsorption. The electrostatic adsorption plate arranged in the working chamber adsorbs the electrolyte particles including salt dust in the gas through adsorption. The diversion effect of the airfoil guide plate is used to achieve the uniform distribution of the fluid velocity in the expansion cavity under a small pressure resistance. The airfoil guide plate arranged at the air inlet makes the high-speed gas evenly distributed in the expansion cavity, effectively reducing the flow rate and increasing the dust removal effect. At the same time, the airfoil guide plate has a small resistance to the flow. Furthermore, the airfoil guide plate adopts an arc design to ensure that the gas flows left and right in the tank along the mainstream direction, improving the uniformity of the gas distribution in the tank. The trumpet-shaped outlet with a large front and a small back is used to achieve a smooth flow of the airflow in the cavity, reduce backflow, and effectively control the pressure resistance.

[0102] The method embodiments provided in the above embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on an electronic device as an example, 8 is a hardware structure block diagram of an electronic device for a purification method of a gas purification device in a compressed air energy storage provided by the present application. Figure 8 As shown, the electronic device 100 may include one or more (only one is shown in the figure) processors 02 (the processor 02 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 04 for storing data, and a transmission module 06 for communication functions. It can be understood by those skilled in the art that Figure 8 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 8 More or fewer components as shown, or with Figure 8 Different configurations are shown.

[0103] The memory 04 can be used to store software programs and modules of application software, such as the program instructions / modules corresponding to the purification method of the gas purification device in the compressed air energy storage in the embodiment of the present application. The processor 02 executes various functional applications and data processing by running the software programs and modules stored in the memory 04, that is, the purification method of the gas purification device in the compressed air energy storage based on the above-mentioned application is realized. The memory 04 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 04 may further include a memory remotely arranged relative to the processor 02, and these remote memories may be connected to the electronic device 100 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0104] The transmission module 06 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the electronic device 100. In one example, the transmission module 06 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission module 06 can be a radio frequency (Radio Frequency, RF) module, which is used to communicate with the Internet wirelessly.

[0105] At the software level, the above-mentioned purification device based on the gas purification device in the compressed air energy storage can be as follows Fig. 9 As shown, including:

[0106] An acquisition module 901 is used to acquire a gas flow rate at a gas inlet in a gas purification device when the compressed gas in the underground salt cavity is transported to the gas purification device;

[0107] A determination module 902 is used to determine the angle of the adjustable guide grid as a target angle according to the gas flow rate;

[0108] A control module 903, used for controlling the adjustable guide fence to rotate to the target angle;

[0109] The purification module 904 is used to control the compressed gas in the underground salt chamber to flow through the adjustable guide grid, and adsorb salt residue and salt dust in the compressed gas through the electrostatic adsorption plate to obtain purified gas and output it.

[0110] In one embodiment, the determination module 902 may specifically calculate the angle of the adjustable guide grid according to the following formula:

[0111]

[0112] Wherein, θ represents the angle of the adjustable guide grid, C represents the length of the working cavity, and D0 represents the inner diameter of the working cavity;

[0113] in:

[0114]

[0115] Wherein, V1 represents the flow rate of the first air inlet, V2 represents the flow rate of the second air inlet, and D m Indicates the diameter of the first and second air inlets.

[0116] In one embodiment, the adjustable guide fence is an airfoil guide fence, the cross section of the airfoil guide fence is an airfoil, and the overall shape is an arc. The arc radius of the adjustable guide fence is determined according to the following formula:

[0117]

[0118] Among them, R b represents the arc radius of the adjustable guide grid, α=2β, where β is the angle between the normal line of the airfoil end surface and the bearing tangent line, R represents the radius of the working cavity, and L represents the distance from the intersection of the airfoil midline of the airfoil guide grid and the longitudinal section of the working cavity to the top of the working cavity.

[0119] In one embodiment, the purification module 904 is used to receive a trigger signal sent by a weighing sensor when the weighing value reaches a preset threshold value during the process of controlling the compressed gas in the underground salt chamber to flow through the adjustable guide grid and adsorbing the salt slag and salt dust of the compressed gas through the electrostatic adsorption plate; in response to the trigger signal, the adjustable guide grid is adjusted to a slag discharge condition to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

[0120] That is, the angle adjustment of the adjustable guide fence is achieved through auxiliary accessories such as the measurement and control system, hydraulic cylinder, transmission mechanism, airfoil guide fence and bearings. Among them, the cross-section of the airfoil guide fence can be an airfoil to achieve the effect of reducing wind resistance. The overall shape of the airfoil guide fence is arc-shaped, which can guide the incoming gas to both sides of the flow direction, thereby ensuring that the flow velocity on the left and right sides of the tank is evenly distributed. By adjusting the angle of the airfoil guide plate, the airflow can be evenly distributed above and below the tank. Under the slag discharge condition, the angle of the airfoil guide fence points to the electrostatic adsorption plate, and the high-speed fluid flows to the electrostatic adsorption plate, forming high pressure at the adsorption plate, blowing up the salt slag and salt dust, and discharging the salt slag and salt dust through the slag discharge port.

[0121] The embodiments of the present application also provide a specific implementation of an electronic device that can implement all the steps in the purification method based on the gas purification device in the compressed air energy storage in the above embodiment. The electronic device specifically includes the following contents: a processor, a memory, a communication interface and a bus; wherein the processor, the memory, and the communication interface communicate with each other through the bus; the processor is used to call the computer program in the memory, and when the processor executes the computer program, all the steps in the purification method based on the gas purification device in the compressed air energy storage in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0122] Step 1: When the compressed gas in the underground salt cavity is transported to the gas purification device, a gas flow rate at a gas inlet in the gas purification device is obtained;

[0123] Step 2: According to the gas flow rate, determining the angle of the adjustable guide grid as the target angle;

[0124] Step 3: Control the adjustable guide fence to rotate to the target angle;

[0125] Step 4: Control the compressed gas in the underground salt cavity to flow through the adjustable guide grid, and adsorb the salt residue and salt dust of the compressed gas through the electrostatic adsorption plate to obtain purified gas and output it.

[0126] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps in the purification method based on the gas purification device in the compressed air energy storage in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the purification method based on the gas purification device in the compressed air energy storage in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0127] Step 1: When the compressed gas in the underground salt cavity is transported to the gas purification device, a gas flow rate at a gas inlet in the gas purification device is obtained;

[0128] Step 2: According to the gas flow rate, determining the angle of the adjustable guide grid as the target angle;

[0129] Step 3: Control the adjustable guide fence to rotate to the target angle;

[0130] Step 4: Control the compressed gas in the underground salt cavity to flow through the adjustable guide grid, and adsorb the salt residue and salt dust of the compressed gas through the electrostatic adsorption plate to obtain purified gas and output it.

[0131] From the above description, it can be seen that the embodiment of the present application arranges a gas inlet, a gas outlet, an adjustable guide grid and an electrostatic adsorption plate, so that the compressed gas flowing into the underground salt cavity of the working cavity is uniformly and directionally processed and the salt slag and salt dust of the compressed gas flowing into the underground salt cavity of the working cavity are adsorbed. The above scheme solves the problem that the slag entrainment phenomenon existing in the existing salt cavern compressed air energy storage system affects the operating safety and efficiency of the unit, and achieves the technical effect of efficiently removing the salt slag and salt dust of the compressed gas flowing through the underground salt cavity.

[0132] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0133] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0134] Although the present application provides method operation steps as described in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0135] Although the present specification embodiment provides the method operation steps as described in the embodiment or flow chart, more or less operation steps may be included based on conventional or non-creative means. The order of steps listed in the embodiment is only one way in the order of execution of many steps, and does not represent a unique execution order. When the device or terminal product in practice is executed, it can be executed in sequence or in parallel (such as a parallel processor or a multi-threaded processing environment, or even a distributed data processing environment) according to the method shown in the embodiment or the accompanying drawings. The term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not clearly listed, or also includes elements inherent to such process, method, product or equipment. In the absence of more restrictions, it is not excluded that there are other identical or equivalent elements in the process, method, product or equipment including the elements.

[0136] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0137] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0138] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0139] Those skilled in the art will appreciate that the embodiments of this specification may be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may take the form of complete hardware embodiments, complete software embodiments or embodiments combining software and hardware. Moreover, the embodiments of this specification may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0140] The present specification embodiments may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present specification embodiments may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0141] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0142] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A gas purification device in compressed air energy storage, characterized in that: include: A working chamber having a first end and a second end, wherein the first end is provided with a gas inlet for compressed gas in the underground salt chamber to flow into the working chamber, and the second end is provided with a gas outlet for purified gas in the working chamber to flow out; An adjustable guide grid is arranged at the air inlet side of the working chamber, and is used to uniformly and directionally process the compressed gas in the underground salt cavity flowing into the working chamber; An electrostatic adsorption plate is arranged at the bottom of the working chamber and is used to adsorb salt slag and salt dust of the compressed gas flowing into the underground salt cavity of the working chamber; The slag discharge port is arranged at the gas outlet side inside the working cavity, wherein the working cavity is a cylindrical working cavity.

2. The gas purification device in the compressed air energy storage according to claim 1 is characterized in that: Also includes: Flow meter and measurement and control system, including: The velocity meter is arranged at the gas inlet, and is used to detect the velocity of the compressed gas in the underground salt cavity flowing into the working cavity, and sends the detected velocity data to the measurement and control system; The measurement and control system is used to adjust the angle of the adjustable guide grid according to the flow velocity data.

3. The gas purification device in the compressed air energy storage according to claim 2 is characterized in that: Also includes: A hydraulic cylinder connected to the measurement and control system; The transmission mechanism is connected with the hydraulic cylinder and the adjustable guide fence. The measurement and control system adjusts the stroke of the hydraulic cylinder to drive the transmission mechanism to move, so as to achieve angle adjustment of the adjustable guide fence.

4. The gas purification device in the compressed air energy storage according to claim 2 is characterized in that: Also includes: A weighing sensor is arranged below the electrostatic adsorption plate, and is used to weigh the salt residue and salt dust adsorbed by the electrostatic adsorption plate, and send a trigger signal to the measurement and control system when the weighing value reaches a preset threshold; The measurement and control system is used to adjust the adjustable guide grid to a slag discharge condition in response to the trigger signal, so as to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

5. The gas purification device in the compressed air energy storage according to claim 2 is characterized in that: The gas inlet arranged at the first end includes: a first air inlet and a second air inlet, and correspondingly, the flow meter includes: a first flow meter and a second flow meter, wherein the first flow meter is arranged on the first air inlet, and the second flow meter is arranged on the second air inlet, and the first air inlet and the second air inlet are arranged horizontally and parallelly.

6. The gas purification device in the compressed air energy storage according to claim 1, characterized in that: The adjustable guide fence is an airfoil guide fence, the cross section of the airfoil guide fence is an airfoil, and the overall shape is an arc.

7. A method for purifying a gas in a compressed air energy storage device according to any one of claims 1 to 6, characterized in that: include: In the case of delivering compressed gas in the underground salt cavity to the gas purification device, obtaining a gas flow rate at a gas inlet in the gas purification device; According to the gas flow rate, determining the angle of the adjustable guide grid as a target angle; Controlling the adjustable guide fence to rotate to the target angle; The compressed gas in the underground salt cavity is controlled to flow through the adjustable guide grid, and the salt residue and salt dust of the compressed gas are adsorbed by the electrostatic adsorption plate to obtain purified gas and output it.

8. The method according to claim 7, characterized in that Determining the angle of the adjustable guide grid according to the gas flow rate includes: The angle of the adjustable guide grid is calculated according to the following formula: Wherein, θ represents the angle of the adjustable guide grid, C represents the length of the working cavity, and D0 represents the inner diameter of the working cavity; in: Wherein, V1 represents the flow rate of the first air inlet, V2 represents the flow rate of the second air inlet, and D m Indicates the diameter of the first and second air inlets.

9. The method according to claim 7, characterized in that: The adjustable guide fence is an airfoil guide fence, the cross section of the airfoil guide fence is an airfoil, and the overall shape is an arc. The arc radius of the adjustable guide fence is determined according to the following formula: Among them, R b represents the arc radius of the adjustable guide grid, α=2β, where β is the angle between the normal line of the airfoil end surface and the bearing tangent line, R represents the radius of the working cavity, and L represents the distance from the intersection of the airfoil midline of the airfoil guide grid and the longitudinal section of the working cavity to the top of the working cavity.

10. The method according to claim 7, characterized in that The process of controlling the compressed gas in the underground salt cavity to flow through the adjustable guide grid and adsorbing salt slag and salt dust of the compressed gas through the electrostatic adsorption plate also includes: Receive a trigger signal sent by a weighing sensor when the weighing value reaches a preset threshold; In response to the trigger signal, the adjustable guide grid is adjusted to a slag discharge condition to discharge the salt slag and salt dust on the electrostatic adsorption plate through a slag discharge port.

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