Filtering and deslagging device and control method

Abstract

The invention provides a filtering and deslagging device and a control method, and the filtering and deslagging device comprises a cylindrical shell which is a hollow cylinder provided with an inlet end and an outlet end; the elliptical filter screen is arranged in the cylindrical shell in a steerable manner; the filter screen switcher is connected with the elliptical filter screen and is used for controlling the elliptical filter screen to rotate to a first position when the filtering and deslagging device is in a filtering working condition and controlling the elliptical filter screen to rotate to a second position when the filtering and deslagging device is in a self-cleaning working condition; and the residue discharging opening is formed in the position, matched with the oval filter screen, of the lower surface of the cylindrical shell and used for discharging residues on the oval filter screen under the condition that the filtering and residue removing device is in the self-cleaning working condition. According to the scheme, on the basis of an existing compressed air energy storage system, the slag content of power generation gas can be reduced, and the operation stability of a compressed air energy storage unit is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of renewable clean energy, and in particular relates to a filtering and deslagging device and a control method. Background Art

[0002] Renewable clean energy is the future development trend of the energy field. With the high proportion of renewable energy such as wind and light connected, the technology that can smooth the output fluctuations of wind and solar power sources and improve the network quality has become a key technology. Compressed air energy storage, as an important form of energy storage, is another technology suitable for large-scale power energy storage after pumped storage. In addition to 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. At present, clean compressed air energy storage technology is the main development direction, among which adiabatic compressed air energy storage is a better energy storage technology. 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. During energy storage, the electric motor can drive 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; during energy release, the compressed air stored in the gas storage device enters the air turbine to expand and generate electricity, 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 cavities during the low load period of the power grid, and release the compressed air in the underground salt cavities to drive air turbines to generate electricity during the peak load period of the power grid. Under the power generation condition, this energy storage method causes high-pressure gas to flow from the underground salt cavity through a pipeline to the ground power station at a high speed. Since there is sediment in the underground salt cavity and new sediment is generated due to collapse during operation, the high-speed gas may carry the sediment into the pipeline. The damage of solid sediment to high-speed rotating air turbines is catastrophic, and may cause accidents such as blade damage. In addition, in the form of multi-salt cavern gas storage, due to the different depths of the salt cavity and the resistance coefficient of the gas transmission system, the exhaust speed and air pressure of different salt cavern gas storage cavities are different, which affects the stable operation of the generator set.

[0004] There is currently no effective solution to the problem that slag and liquid inclusion phenomena in compressed air energy storage systems affect the operating safety and efficiency of the units. Summary of the invention

[0005] The purpose of the present application is to provide a filtering and removing slag device and a control method, which can effectively deal with the slag and liquid entrainment phenomenon in the compressed air energy storage system and realize efficient filtration of compressed air in underground salt chambers.

[0006] The present application provides a filtering and deslagging device and a control method which are implemented as follows:

[0007] A filtering and deslagging device, comprising:

[0008] A cylindrical shell, wherein the cylindrical shell is a hollow cylinder provided with an inlet end and an outlet end;

[0009] An elliptical filter screen is steerably disposed inside the cylindrical housing;

[0010] a filter screen switcher connected to the elliptical filter screen, and used to control the elliptical filter screen to rotate to a first position when the filtering and deslagging device is in a filtering state, and to control the elliptical filter screen to rotate to a second position when the filtering and deslagging device is in a self-cleaning state, wherein in the first position, the first vertex of the elliptical filter screen contacts the upper edge of the cylindrical shell, and the second vertex contacts the lower edge of the cylindrical shell, and in the second position, the first vertex of the elliptical filter screen contacts the lower edge of the cylindrical shell, and the second vertex contacts the upper edge of the cylindrical shell;

[0011] A slag discharge port is arranged on the lower surface of the cylindrical shell at a position adapted to the elliptical filter screen, and is used to discharge the residue on the elliptical filter screen when the filtering and slag removal device is in a self-cleaning condition.

[0012] In one embodiment, the elliptical filter screen comprises: a first filter screen and a second filter screen, wherein the first filter screen is arranged near the inlet end, the second filter screen is arranged near the outlet end, and the mesh number of the first filter screen is smaller than the mesh number of the second filter screen; accordingly, the slag discharge port comprises: a first slag discharge port and a second slag discharge port, wherein the first slag discharge port is arranged at a position adapted to the first filter screen, and the second slag discharge port is arranged at a position adapted to the second filter screen.

[0013] In one embodiment, the above device further comprises:

[0014] A first pressure sensor disposed between the inlet end and the elliptical filter, for detecting the pressure of the gas before passing through the elliptical filter as first pressure data;

[0015] A second pressure sensor disposed between the elliptical filter and the outlet end, for detecting the pressure of the gas after passing through the elliptical filter as second pressure data;

[0016] The controller is used to obtain the first pressure data and the second pressure data, and control the filter switch according to the first pressure data and the second pressure data.

[0017] In one embodiment, the above-mentioned device also includes: an electromagnetic brake connected to the elliptical filter, which is used to power on and lock it when the filter switch controls the elliptical filter to rotate to the first position, or when the filter switch controls the elliptical filter to rotate to the second position.

[0018] In one embodiment, the above device further comprises:

[0019] An outlet valve, arranged at the outlet end, for controlling whether the outlet end is connected;

[0020] A slag discharge valve, arranged at the slag discharge port, for controlling whether the slag discharge port is connected;

[0021] When the filtering and deslagging device is in filtering condition, the outlet valve is in an open state and the slag discharge valve is in a closed state;

[0022] When the filtering and deslagging device is in the self-cleaning condition, the outlet valve is in the closed state and the slag discharge valve is in the open state.

[0023] In one embodiment, the outer ring skeleton shape of the elliptical filter is:

[0024]

[0025] Wherein, x represents the lateral length of the elliptical filter, y represents the longitudinal length of the elliptical filter, D represents the inner diameter of the cylindrical shell, and θ represents the angle formed between the plane of the elliptical filter and the axis of the cylindrical shell when the elliptical filter rotates to the first position, wherein 0°<θ<90°.

[0026] In one embodiment, the filtering and deslagging device is arranged between the collection tree and the primary heat exchanger of the pipeline on the power generation side of the salt cavern compressed air energy storage power station.

[0027] A method for controlling the above-mentioned filtering and deslagging device comprises:

[0028] When the filtering and deslagging device is in filtering working condition, obtaining pressure data of the inlet end and the outlet end of the cylindrical shell;

[0029] Calculating the difference between the pressure data at the inlet end and the pressure data at the outlet end;

[0030] When the difference is greater than a preset threshold, the filter switch is controlled to rotate the elliptical filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the elliptical filter.

[0031] In one embodiment, after controlling the filter switch to rotate the elliptical filter from the first position to the second position, the method further includes: controlling the electromagnetic brake to be energized and locked.

[0032] A computer-readable storage medium stores a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0033] The present application provides a filtering and deslagging device, which includes: a cylindrical shell, which is a hollow cylinder provided with an inlet end and an outlet end; an elliptical filter screen, which is rotatably arranged inside the cylindrical shell; a filter screen switcher, connected to the elliptical filter screen, and used to control the elliptical filter screen to rotate to a first position when the filtering and deslagging device is in a filtering condition, and to control the elliptical filter screen to rotate to a second position when the filtering and deslagging device is in a self-cleaning condition, in which the first vertex of the elliptical filter screen contacts the upper edge of the cylindrical shell, and the second vertex contacts the lower edge of the cylindrical shell, and in the second position, the first vertex of the elliptical filter screen contacts the lower edge of the cylindrical shell, and the second vertex contacts the upper edge of the cylindrical shell; a slag discharge port, which is arranged on the lower surface of the cylindrical shell, at a position adapted to the elliptical filter screen, and is used to discharge residue on the elliptical filter screen when the filtering and deslagging device is in a self-cleaning condition. The above scheme can reduce the slag content of power generation gas and improve the operating stability of compressed air energy storage units on the basis of the existing compressed air energy storage system. By using an inclined elliptical filter, the gas filtering area is increased and the filter pressure resistance is reduced; the direction of the inclined elliptical filter is switched by a switch, achieving the technical effect of online rapid recoil filtration and improving self-cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 It is a structural schematic diagram of an embodiment of a filtering and deslagging device provided in the present application;

[0036] Figure 2 It is a structural schematic diagram of a filtering and deslagging device in a self-cleaning mode provided by the present application;

[0037] Figure 3 It is a structural schematic diagram of a filtering and deslagging device provided in the present application and provided with two filter screens;

[0038] Figure 4 This is a method flow chart of an embodiment of a control method for a filtering and deslagging device provided in the present application;

[0039] Figure 5 It is a method flow chart of another embodiment of the control method of the filtering and deslagging device provided by the present application;

[0040] Figure 6 It is a structural schematic diagram of the recoil self-cleaning filtering and deslagging device provided by the present application;

[0041] Figure 7 is a top view of the recoil self-cleaning filtering and deslagging device provided by the present application;

[0042] Figure 8 It is a front view of the recoil self-cleaning filtering and deslagging device provided by the present application;

[0043] Fig. 9 It is a schematic diagram of gas flow under filtering conditions provided by this application;

[0044] Fig.10 It is a schematic diagram of gas flow under the self-cleaning condition provided by the present application;

[0045] Fig.11 It is a signal flow chart of the recoil self-cleaning filtering and deslagging device provided by the present application;

[0046] Fig.12 It is a schematic diagram of the size structure of the elliptical filter provided in this application;

[0047] Fig.13 It is a hardware structure block diagram of an electronic device of a control method provided by the present application;

[0048] Fig.14 It is a schematic diagram of the module structure of an embodiment of the control device provided in the present application. DETAILED DESCRIPTION

[0049] 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.

[0050] The existing compressed air energy storage gas filter device is an ordinary filter. The blockage of the filter will lead to an increase in pressure resistance, affecting the power generation efficiency. Furthermore, it will also affect the stability of the compressed air energy storage power station gas transmission system. For the cleaning of the filter, it is generally necessary to open the gas transmission pipeline in the shutdown state and clean or replace the filter manually. This filter cleaning method is relatively complicated and time-consuming, and requires a large manpower cost.

[0051] Based on this, a filtering and slag removal device is provided in this example. Figure 1 As shown, it may include:

[0052] A cylindrical shell 101, which is a hollow cylinder provided with an inlet end 1011 and an outlet end 1012;

[0053] The elliptical filter screen 102 is steerably disposed inside the cylindrical housing;

[0054] The filter switch 103 is connected to the elliptical filter and is used to control the elliptical filter to rotate to the first position when the filtering and deslagging device is in the filtering state, and to control the elliptical filter to rotate to the second position when the filtering and deslagging device is in the self-cleaning state. Figure 1 As shown, in the first position, the first vertex of the elliptical filter contacts the upper edge of the cylindrical shell, and the second vertex contacts the lower edge of the cylindrical shell. Figure 2 As shown, in the second position, the first vertex of the elliptical filter screen contacts the lower edge of the cylindrical shell, and the second vertex contacts the upper edge of the cylindrical shell; and when in the filtering condition, the surface of the filter screen facing the inlet end faces the slag discharge port in the second position, so that the residue on the filter screen can be effectively removed;

[0055] The slag discharge port 104 is arranged on the lower surface of the cylindrical shell at a position adapted to the elliptical filter screen, and is used to discharge the residue on the elliptical filter screen when the filtering and deslagging device is in a self-cleaning state.

[0056] That is, by providing a filter switch and a rotatable filter, under filtering conditions, the front of the filter filters the passing gas, and under self-cleaning conditions, the filter is cleaned by the passing wind, and the cleaned residue is directly discharged through the residue discharge port. In this way, the filter can be cleaned by the filter switch without removing the filter for cleaning, thereby achieving simple and efficient filter cleaning.

[0057] During implementation, in order to realize automatic filter screen cleaning control, the above-mentioned filtering and deslagging device may further include:

[0058] A first pressure sensor disposed between the inlet end and the elliptical filter, for detecting the pressure of the gas before passing through the elliptical filter as first pressure data;

[0059] A second pressure sensor disposed between the elliptical filter and the outlet end, for detecting the pressure of the gas after passing through the elliptical filter as second pressure data;

[0060] The controller is used to obtain the first pressure data and the second pressure data, and control the filter switch according to the first pressure data and the second pressure data.

[0061] That is, by setting pressure sensors before the gas passes through the filter and after the gas passes through the filter, respectively, the pressure sensors are used to detect the pressure before the gas passes through the filter and the pressure after the gas passes through the filter, and whether the filter is cleaned is determined based on the pressure difference between the pressure before the gas passes through the filter and the pressure after the gas passes through the filter. Because the more impurities attached to the filter, the greater the pressure difference. Based on this, a pressure difference threshold can be set. If the pressure difference reaches the pressure difference threshold, the filter switch can be automatically triggered to switch the elliptical filter, and the elliptical filter can be converted from the first position to the second position, thereby removing impurities on the filter.

[0062] Furthermore, in order to fix the elliptical filter in the first position or the second position to avoid poor filtering and cleaning effects due to movement, in this example, an electromagnetic brake is also provided in the filtering and slag removal device, which is connected to the elliptical filter and is used to electrically lock the elliptical filter when the filter switch controls the elliptical filter to rotate to the first position, or when the filter switch controls the elliptical filter to rotate to the second position. That is, the locking requirement of the filter is achieved by the electromagnetic brake. Specifically, the above-mentioned elliptical filter is rotatably installed in the cylindrical housing 101 through the filter shaft, and the electromagnetic brake is installed on the non-drive side of the filter shaft of the elliptical filter to prevent the filter from rotating due to the unbalanced force of the airflow after being locked.

[0063] In order to ensure the flow direction of gas in the cleaning state and the filtering state, the above-mentioned filtering and slag removal device can also be provided with: an outlet valve, arranged at the outlet end, for controlling whether the outlet end is connected; a slag discharge valve, arranged at the slag discharge port, for controlling whether the slag discharge port is connected; when the filtering and slag removal device is in the filtering condition, the outlet valve is in the open state, and the slag discharge valve is in the closed state; when the filtering and slag removal device is in the self-cleaning condition, the outlet valve is in the closed state, and the slag discharge valve is in the open state.

[0064] Among them, the above-mentioned outlet valve, slag discharge valve, electromagnetic brake, etc. are all electronic control valves, and the controller can realize the control of these electronic control valves.

[0065] That is, the pressure signals of the pressure sensor at the inlet and the pressure sensor at the outlet are transmitted to the controller, and the controller calculates the pressure difference on both sides of the elliptical filter. When the pressure difference is greater than the threshold, the controller transmits the signal to the filter switcher, the outlet valve, the slag discharge valve and the electromagnetic brake. The outlet valve is closed, the slag discharge valve is opened, the electromagnetic brake is powered off and released, the filter switcher is activated to reverse the elliptical filter, and then the electromagnetic brake is powered on and locked.

[0066] The outer ring skeleton shape of the above-mentioned elliptical filter can be expressed as:

[0067]

[0068] Wherein, x represents the lateral length of the elliptical filter, y represents the longitudinal length of the elliptical filter, D represents the inner diameter of the cylindrical shell, and θ represents the angle formed between the plane of the elliptical filter and the axis of the cylindrical shell when the elliptical filter rotates to the first position, wherein 0°<θ<90°.

[0069] Considering that when filtering gas, if two filter screens can be set, one coarse screen and one fine screen, the filtering accuracy can be effectively improved. Based on this, in one embodiment, Figure 3 As shown, the above-mentioned elliptical filter may include: a first filter 1021 and a second filter 1022, wherein the first filter is arranged near the inlet end, and the second filter is arranged near the outlet end, and the mesh number of the first filter is smaller than the mesh number of the second filter, that is, the first filter realizes coarse screening, and the second filter realizes fine screening; accordingly, the slag discharge port may include: a first slag outlet 1041 and a second slag outlet 1042, wherein the first slag outlet is arranged at a position adapted to the first filter, and the second slag outlet is arranged at a position adapted to the second filter.

[0070] Correspondingly, in the case where the elliptical filter includes: a first filter 1021 and a second filter 1022, two filter switchers can also be provided, one for steering control of the first filter and the other for steering control of the second filter.

[0071] When the elliptical filter includes: a first filter 1021 and a second filter 1022, the pressure sensor may be arranged in one of the following ways:

[0072] 1) A pressure sensor is set at the inlet end and a pressure sensor is set at the outlet end, and the two filters are uniformly controlled by the pressure difference detected by the two sensors;

[0073] 2) A pressure sensor (sensor 1) is set at the inlet end, a pressure sensor (sensor 2) is set between the two filters, and a pressure sensor (sensor 3) is set at the outlet end. The first filter is controlled by the pressure difference detected by sensor 1 and sensor 2, and the second filter is controlled by the pressure difference detected by sensor 2 and sensor 3. At the same time, the two filters are uniformly controlled by the pressure difference detected by sensor 1 and sensor 3.

[0074] The above-mentioned filtering and deslagging device can be set between the pipeline collection tree on the power generation side of the salt cavern compressed air energy storage power station and the primary heat exchanger. It is completely different from the existing installation of a filter screen at the ground outlet. By setting a filtering and deslagging device between the pipeline collection tree on the power generation side of the salt cavern compressed air energy storage power station and the primary heat exchanger, it is simpler and more controllable to implement, and the filtering effect is better. It can directly prevent the slag-containing gas from entering the heat exchanger, thereby improving the protection of the heat exchanger.

[0075] It is impossible to determine the mesh number of the existing filter. If the mesh number 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. In this case, by setting up multiple filters with different mesh numbers for filtering and realizing self-cleaning of the filter, it can be achieved that while effective filtration is achieved, the gas flow resistance will not be significantly increased, and the effects of slag removal, dust removal, convergence and pressure stabilization of the salt cavern compressed air energy storage power generation gas are achieved, thereby meeting the needs of the pressure storage system.

[0076] In this example, a method for controlling the above-mentioned filtering and deslagging device is also provided. Figure 4 It is a method flow chart of an embodiment of the method for controlling the above-mentioned filtering and deslagging device 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 is applied to an actual device or terminal product, it can be connected according to the method or module structure shown in the embodiments 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).

[0077] Specifically, Figure 4 As shown, the above control method may include the following steps:

[0078] Step 401: When the filtering and deslagging device is in a filtering state, obtain pressure data of the inlet end and the outlet end of the cylindrical shell;

[0079] Step 402: Calculate the difference between the pressure data at the inlet and the pressure data at the outlet;

[0080] Step 403: When the difference is greater than a preset threshold, the filter switch is controlled to rotate the elliptical filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the elliptical filter.

[0081] In this example, a method for controlling the above-mentioned filtering and deslagging device is also provided, for the case where two filter screens and three pressure sensors are set, such as Figure 5 As shown, the following steps may be included:

[0082] Step 501: When the filtering and deslagging device is in filtering working condition, obtain pressure data of the inlet end of the cylindrical shell, pressure data between the first filter screen and the second filter screen, and pressure data of the outlet end;

[0083] Step 502: Calculate the difference between the pressure data at the inlet and the pressure data between the first filter and the second filter as the first difference, calculate the difference between the pressure data between the first filter and the second filter and the pressure data at the outlet as the second difference; calculate the difference between the pressure data at the inlet and the pressure data at the outlet as the third difference;

[0084] Step 503: When the first difference is greater than a preset threshold, the filter screen switch is controlled to rotate the first filter screen from the first position to the second position, and the outlet valve is controlled to be closed and the slag discharge valve is controlled to be opened to achieve self-cleaning of the first filter screen;

[0085] Step 504: when the second difference is greater than a preset threshold, controlling the filter switcher to rotate the second filter from the first position to the second position, and controlling the outlet valve to close and the slag discharge valve to open, so as to achieve self-cleaning of the second filter;

[0086] Step 505: When the third difference is greater than a preset threshold, the filter switch is controlled to rotate the first filter and the second filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the first filter and the second filter.

[0087] That is, when the filtering and deslagging device is in the filtering condition, the gas enters the filter housing through the inlet valve, the pressure sensor at the inlet end measures the inlet gas pressure, and the gas passes through the elliptical filter, which filters the gas. The gas leaves the device through the outlet valve. When the filtering and deslagging device is in the self-cleaning condition, the elliptical filter is reversed, and the gas passes through the filter in the opposite direction, taking away the impurities on the filter, and the impurities taken away leave the device from the slag discharge port to achieve the purpose of cleaning the filter. And when the filtering and deslagging device is in the filtering condition, the pressure signals of the pressure sensor at the inlet end and the pressure sensor at the outlet end are transmitted to the controller, and the controller calculates the pressure difference on both sides of the elliptical filter. When the pressure difference is greater than the threshold, the controller transmits the signal to the filter switcher, the outlet valve, the slag discharge valve and the electromagnetic brake, controls the outlet valve to close, the slag discharge valve to open, the electromagnetic brake is powered off and released, the filter switcher is actuated, the elliptical filter is reversed, and then the electromagnetic brake is powered on and locked. That is, after the filter switcher is controlled to rotate the elliptical filter from the first position to the second position, the electromagnetic brake is powered on and locked.

[0088] The above method is described below in conjunction with a specific embodiment. However, it should be noted that this specific embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application.

[0089] The problem of slag entrained in power generation gas can be solved by installing a filter at the ground outlet, but the mesh number of the filter cannot be effectively determined. If the mesh number is too low, the filtering effect cannot be achieved. If the mesh number is too high, the gas flow resistance will increase. Long-term blockage of the filter and the accumulation of sediment in front of the filter will also increase the gas flow resistance. Furthermore, since the air turbine has requirements for gas humidity, the liquid washing method cannot be used for the filter. In addition, since the centrifugal separation method, electrostatic method, and ultrasonic method require the gas to be still or at a low speed, they cannot be applied to compressed air energy storage. For the cleaning of the filter, the gas pipeline is generally opened in the shutdown state, and the filter is cleaned or replaced manually. The operation is relatively complicated and time-consuming, and the labor cost required is relatively high.

[0090] In this example, a backwash self-cleaning filter and slag removal device is provided. Figure 6 As shown, it includes: an inlet valve 1, an inlet pressure sensor 2, a filter housing 3, an elliptical filter 4, a filter switch 5, a slag discharge valve 6, an outlet pressure sensor 7, an outlet valve 8 and an electromagnetic brake 9. When the device is in the filtering condition, the gas enters the filter housing 3 through the inlet valve 1, and the inlet pressure sensor 2 measures the inlet gas pressure. The gas passes through the elliptical filter 4, and the elliptical filter 4 filters the gas. The gas leaves the device through the outlet valve 8. When the device is in the self-cleaning condition, the elliptical filter 4 is reversed, and the gas passes through the filter in the opposite direction, taking away the impurities on the filter, and the impurities taken away leave the device from the slag discharge valve 6 to achieve the purpose of cleaning the filter.

[0091] like Figure 7 The figure shows a top view of the above-mentioned recoil self-cleaning filtering and deslagging device, as shown in FIG. Figure 8 Shown is a front view of the above-mentioned recoil self-cleaning filtering and deslagging device.

[0092] For the above-mentioned backwash self-cleaning filtering and deslagging device, there may be two operating conditions: filtering condition and self-cleaning condition, such as Fig. 9 As shown in the figure, it is the filtering condition. Under the filtering condition, the slag discharge valve 6 is closed, the outlet valve 8 is opened, and the gas flows along the direction of the dotted arrow, from the front side of the elliptical filter 4 to the back side of the elliptical filter 4, and the impurities remain on the front side of the elliptical filter 4. Fig.10 As shown, it is a self-cleaning condition. Under the self-cleaning condition, the slag discharge valve 6 is opened, the outlet valve 8 is closed, and the gas flows in the direction of the dotted arrow from the back side of the elliptical filter 4 to the front side of the elliptical filter 4. Impurities leave the front side of the elliptical filter 4 and are discharged from the device along with the gas through the slag discharge valve 6. Furthermore, an electromagnetic brake 9 is installed on the non-driving side of the filter shaft of the recoil self-cleaning filtering and deslagging device to prevent the filter from rotating due to the unbalanced force of the airflow after being locked.

[0093] The signal flow chart of the above-mentioned backwash self-cleaning filter and slag removal device can be as follows: Fig.11 As shown, the pressure signals of the inlet pressure sensor 2 and the outlet pressure sensor 7 are transmitted to the controller, and the controller calculates the pressure difference on both sides of the elliptical filter 4. When the pressure difference is greater than the threshold value, the controller transmits the signal to the filter switch 5, the outlet valve 8, the slag discharge valve 6 and the electromagnetic brake 9, the outlet valve 8 is closed, the slag discharge valve 6 is opened, the electromagnetic brake 9 is powered off and released, the filter switch 5 is activated, the elliptical filter 4 is reversed, and then the electromagnetic brake 9 is powered on and locked.

[0094] like Fig.12 As shown in the figure, it is a schematic diagram of the size structure of the elliptical filter. The outer ring skeleton of the elliptical filter can be expressed as:

[0095]

[0096] Wherein, x represents the lateral length of the elliptical filter, y represents the longitudinal length of the elliptical filter, D represents the inner diameter of the cylindrical shell, and θ represents the angle formed between the plane of the elliptical filter and the axis of the cylindrical shell when the elliptical filter rotates to the first position, wherein 0°<θ<90°.

[0097] That is, an elliptical filter is used, the shape of which is determined by the inner diameter of the device and the slope of the filter, and the angle between the inclined filter and the axis of the device is between 0 and 90 degrees. An electric motor is used as a filter switching device, and the automatic switching of filtering and cleaning conditions is achieved through online angle switching. A pressure sensor is used to measure the pressure difference before and after the filter to achieve online measurement of the filter blockage rate. A controller is used to remotely evaluate the filter blockage rate based on the pressure difference and automatically control the switch and valve to achieve automatic condition switching.

[0098] In the above example, a recoil self-cleaning filter slag removal device is provided, which is installed between the collection tree and the primary heat exchanger of the pipeline on the power generation side of the salt cavern compressed air energy storage power station. In the working state, the inlet and outlet valves are opened and the slag discharge valve is closed. High-pressure gas enters the filter housing through the inlet valve, the inlet pressure sensor measures the inlet gas pressure, and the outlet pressure sensor measures the outlet gas pressure. The pressure signal is transmitted to the controller, and the controller calculates the inlet and outlet pressure difference in real time as a basis for judging the filtering condition. The gas flows from the front to the back of the elliptical filter through the elliptical filter, and the elliptical filter filters the gas. The filtered gas leaves the device through the outlet valve. When the inlet and outlet pressure difference calculated by the controller reaches the critical value, the outlet valve is closed, the slag discharge valve is opened, the elliptical filter is reversed, and the gas flows from the back to the front of the elliptical filter through the elliptical filter, taking away the impurities on the filter, and leaves the device through the slag discharge valve.

[0099] The recoil self-cleaning filtering and slag removal device provided in the above example can reduce the slag content of power generation gas and improve the operating stability of the compressed air energy storage unit on the basis of the existing compressed air energy storage system. By using an inclined elliptical filter, the gas filtering area is increased and the filter pressure resistance is reduced; the direction of the inclined elliptical filter is switched by a switch, achieving the technical effect of online rapid recoil filtration and improving self-cleaning efficiency. Furthermore, by setting the inlet and outlet pressure sensors, the purpose of automatic evaluation and automatic cleaning of the filter blockage rate can be achieved, which improves the degree of automation of the device.

[0100] 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, Fig.13 is a hardware structure block diagram of an electronic device of a control method provided by this application. Fig.13 As shown, the electronic device 10 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 Fig.13The structure shown is only for illustration and does not limit the structure of the above electronic device. Fig.13 More or fewer components as shown, or with Fig.13 Different configurations shown.

[0101] The memory 04 can be used to store software programs and modules of application software, such as program instructions / modules corresponding to the control method 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 control method of 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 examples, 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 10 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 combinations thereof.

[0102] 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 10. 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.

[0103] At the software level, the above control device can be Fig.14 As shown, including:

[0104] An acquisition module 1401 is used to acquire pressure data of the inlet end and the outlet end of the cylindrical shell when the filtering and deslagging device is in a filtering state;

[0105] A calculation module 1402, used to calculate the difference between the pressure data at the inlet end and the pressure data at the outlet end;

[0106] The control module 1403 is used to control the filter switch to rotate the elliptical filter from the first position to the second position when the difference is greater than a preset threshold, and control the outlet valve to close and the slag discharge valve to open to achieve self-cleaning of the elliptical filter.

[0107] In one embodiment, when the filtering and deslagging device is in a filtering condition, the pressure data of the inlet end of the cylindrical shell, the pressure data between the first filter screen and the second filter screen, and the pressure data of the outlet end are obtained; the difference between the pressure data at the inlet end and the pressure data between the first filter screen and the second filter screen is calculated as the first difference, and the difference between the pressure data between the first filter screen and the second filter screen and the pressure data at the outlet end is calculated as the second difference; the difference between the pressure data at the inlet end and the pressure data at the outlet end is calculated as the third difference; when the first difference is greater than a preset threshold, the filter switch is controlled to enable the filter switch to switch the filter to the filter. The first filter is rotated from the first position to the second position, and the outlet valve is controlled to be closed, and the slag discharge valve is controlled to be opened, so as to realize self-cleaning of the first filter; when the second difference is greater than the preset threshold, the filter switch is controlled to rotate the second filter from the first position to the second position, and the outlet valve is controlled to be closed, and the slag discharge valve is controlled to be opened, so as to realize self-cleaning of the second filter; when the third difference is greater than the preset threshold, the filter switch is controlled to rotate the first filter and the second filter from the first position to the second position, and the outlet valve is controlled to be closed, and the slag discharge valve is controlled to be opened, so as to realize self-cleaning of the first filter and the second filter.

[0108] The embodiments of the present application also provide a specific implementation of an electronic device capable of implementing all the steps of the control method in the above embodiments, wherein 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 a computer program in the memory, and when the processor executes the computer program, all the steps of the control method in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0109] Step 1: When the filtering and deslagging device is in a filtering state, obtain pressure data of the inlet end and the outlet end of the cylindrical shell;

[0110] Step 2: Calculate the difference between the pressure data at the inlet and the pressure data at the outlet;

[0111] Step 3: When the difference is greater than a preset threshold, the filter switch is controlled to rotate the elliptical filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the elliptical filter.

[0112] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the control method in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the control method in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0113] Step 1: When the filtering and deslagging device is in a filtering state, obtain pressure data of the inlet end and the outlet end of the cylindrical shell;

[0114] Step 2: Calculate the difference between the pressure data at the inlet and the pressure data at the outlet;

[0115] Step 3: When the difference is greater than a preset threshold, the filter switch is controlled to rotate the elliptical filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the elliptical filter.

[0116] From the above description, it can be seen that the above scheme can reduce the slag content of power generation gas and improve the operating stability of compressed air energy storage units on the basis of the existing compressed air energy storage system. By using an inclined elliptical filter, the gas filtering area is increased and the filter pressure resistance is reduced; the direction of the inclined elliptical filter is switched by a switch, achieving the technical effect of online rapid recoil filtration and improving self-cleaning efficiency.

[0117] 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.

[0118] 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.

[0119] 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).

[0120] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a vehicle-mounted human-computer interaction device, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0126] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0127] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0128] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0129] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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 filtering and deslagging device, characterized in that: include: A cylindrical shell, wherein the cylindrical shell is a hollow cylinder provided with an inlet end and an outlet end; An elliptical filter screen is steerably disposed inside the cylindrical housing; a filter screen switcher connected to the elliptical filter screen, and used to control the elliptical filter screen to rotate to a first position when the filtering and deslagging device is in a filtering state, and to control the elliptical filter screen to rotate to a second position when the filtering and deslagging device is in a self-cleaning state, wherein in the first position, the first vertex of the elliptical filter screen contacts the upper edge of the cylindrical shell, and the second vertex contacts the lower edge of the cylindrical shell, and in the second position, the first vertex of the elliptical filter screen contacts the lower edge of the cylindrical shell, and the second vertex contacts the upper edge of the cylindrical shell; A slag discharge port is arranged on the lower surface of the cylindrical shell at a position adapted to the elliptical filter screen, and is used to discharge the residue on the elliptical filter screen when the filtering and slag removal device is in a self-cleaning condition.

2. The filtering and deslagging device according to claim 1, characterized in that: The elliptical filter screen comprises: a first filter screen and a second filter screen, wherein the first filter screen is arranged near the inlet end, the second filter screen is arranged near the outlet end, and the mesh number of the first filter screen is smaller than the mesh number of the second filter screen; correspondingly, the slag discharge port comprises: a first slag outlet and a second slag outlet, wherein the first slag outlet is arranged at a position adapted to the first filter screen, and the second slag outlet is arranged at a position adapted to the second filter screen.

3. The filtering and deslagging device according to claim 1, characterized in that: Also includes: A first pressure sensor disposed between the inlet end and the elliptical filter, for detecting the pressure of the gas before passing through the elliptical filter as first pressure data; A second pressure sensor disposed between the elliptical filter and the outlet end, for detecting the pressure of the gas after passing through the elliptical filter as second pressure data; The controller is used to obtain the first pressure data and the second pressure data, and control the filter switch according to the first pressure data and the second pressure data.

4. The filtering and deslagging device according to claim 1, characterized in that: Also includes: The electromagnetic brake is connected to the elliptical filter and is used to be powered on and locked when the filter switch controls the elliptical filter to rotate to the first position, or when the filter switch controls the elliptical filter to rotate to the second position.

5. The filtering and deslagging device according to claim 1, characterized in that: Also includes: An outlet valve, arranged at the outlet end, for controlling whether the outlet end is connected; A slag discharge valve, arranged at the slag discharge port, for controlling whether the slag discharge port is connected; When the filtering and deslagging device is in filtering condition, the outlet valve is in an open state and the slag discharge valve is in a closed state; When the filtering and deslagging device is in the self-cleaning condition, the outlet valve is in the closed state and the slag discharge valve is in the open state.

6. The filtering and deslagging device according to claim 1, characterized in that: The outer ring skeleton shape of the elliptical filter is: Wherein, x represents the lateral length of the elliptical filter, y represents the longitudinal length of the elliptical filter, D represents the inner diameter of the cylindrical shell, and θ represents the angle formed between the plane of the elliptical filter and the axis of the cylindrical shell when the elliptical filter rotates to the first position, wherein 0°<θ<90°.

7. The filtering and deslagging device according to claim 1, characterized in that: The filtering and deslagging device is arranged between the collecting tree and the primary heat exchanger of the pipeline on the power generation side of the salt cavern compressed air energy storage power station.

8. A method for controlling the filtering and deslagging device according to any one of claims 1 to 7, characterized in that: include: When the filtering and deslagging device is in filtering working condition, obtaining pressure data of the inlet end and the outlet end of the cylindrical shell; Calculating the difference between the pressure data at the inlet end and the pressure data at the outlet end; When the difference is greater than a preset threshold, the filter switch is controlled to rotate the elliptical filter from the first position to the second position, and the outlet valve is controlled to close and the slag discharge valve is controlled to open to achieve self-cleaning of the elliptical filter.

9. The method according to claim 8, characterized in that After controlling the filter switcher to rotate the elliptical filter from the first position to the second position, the method further includes: Control the electromagnetic brake to energize and lock.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 8 to 9 are implemented.

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