Automatic ash removal device and method for carbon calcination flue gas SCR denitration catalyst

Abstract

Disclosed is a carbon calcination flue gas SCR denitration catalyst automatic ash removal device and method. In the device, catalyst gaps exist between adjacent SCR denitration catalysts and between the SCR denitration catalyst and the shell. Every two filter screens are arranged obliquely on a single SCR denitration catalyst to form a triangular structure. A blocking plate cover is arranged in the catalyst gap. Based on the rotation of the connecting rod, the blocking plate is lifted to open the catalyst gap and is lowered to close the catalyst gap. In response to the pressure difference data, the control system determines that the filter screen ash accumulation state exceeds the predetermined range, sends an ash blowing signal to the shock wave ash blowing device to perform the ash blowing operation, and sends a lifting signal to the execution motor. The blocking plate is lifted with the rotation of the connecting rod to open the catalyst gap. The dust passes through the catalyst gap to the flue gas outlet under the double action of the ash blowing operation and the through flow of the opened catalyst gap. The device effectively reduces the ash accumulation and blockage of the SCR denitration catalyst and the surface filter screen and reduces the denitration effect.

Description

Technical Field

[0001] This invention relates to the field of carbon calcination flue gas emission treatment technology, and in particular to an automatic ash removal device and method for SCR denitrification catalyst in carbon calcination flue gas. Background Technology

[0002] In the calcination section of aluminum anode production, NO is emitted from the raw flue gas. x Content at 200mg / m 3 The levels are around [number], exceeding industry and local environmental protection standards, necessitating flue gas denitrification treatment according to environmental requirements. However, using only SNCR at the high-temperature section of the calciner outlet for denitrification is insufficient due to process efficiency limitations, failing to fully meet emission standards and ensure stable operation. To ensure NO [missing information - likely related to emissions standards]... x To achieve ideal and stable emissions, a two-stage SNCR+SCR denitrification method is used, based on the calcination flue gas temperature and actual NO₂ levels. x The content must be effectively controlled. Due to the high sulfur content in the flue gas, the presence of some fly ash components, and the formation of ammonium bisulfate during the denitrification process, the filter screen on the surface of the SCR denitrification catalyst becomes severely and frequently clogged with ash. This affects the catalyst's operation and performance, leading to excessive NOx emissions and increased load on the denitrification system. This results in a vicious cycle of ammonia escape, severe ammonium bisulfate buildup, and instability in the equipment system.

[0003] In summary, although existing technologies employ sonic soot blowing for targeted solutions, they cannot meet the cleaning requirements or effectively alleviate ash accumulation and blockage. They also have drawbacks such as direct damage to the catalyst when using shock wave soot blowers, high energy consumption and catalyst failure when using steam soot blowers, leading to increased flue gas resistance, high operating costs for denitrification, and forced shutdown of manual mechanical cleaning.

[0004] The information disclosed in the background section is only intended to enhance the understanding of the background of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic ash removal device and method for SCR denitrification catalyst in carbon calcination flue gas. This invention realizes the composition of carbon calcination flue gas, the arrangement position and temperature range of SCR catalyst in the SNCR+SCR two-stage denitrification method, the current status of ash accumulation, and sonic soot blowing and shock wave direct soot blowing. It overcomes the defects in actual operation, such as ash accumulation and blockage, resulting in low overall operational stability, increased ammonia escape due to increased ammonia injection after blockage, serious ammonium bisulfate, and a vicious cycle that affects the stable operation of the equipment system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to the present invention includes:

[0008] The shell has a flue gas inlet for introducing carbon calcination flue gas and a flue gas outlet after desulfurization;

[0009] Multiple SCR denitrification catalysts are arranged laterally in the shell and located between the flue gas inlet and the flue gas outlet. There are catalyst gaps between adjacent SCR denitrification catalysts and between the SCR denitrification catalysts and the shell.

[0010] Multiple filters are used to filter the carbon calcination flue gas from the flue gas inlet. Two filters are arranged at an angle on a single SCR denitrification catalyst to form a triangular structure.

[0011] A lifting movable baffle device includes,

[0012] Actuating motor,

[0013] A first rotating shaft, which is drively connected to the actuator motor, extends horizontally and is rotatably supported via bearings.

[0014] A first connecting rod is perpendicularly connected to the first rotating shaft to rotate with the first rotating shaft.

[0015] A connecting rod, which is vertically connected to the first connecting rod and remains horizontal, rotates with the first connecting rod.

[0016] A blocking plate is disposed over the catalyst gap. Based on the rotation of the connecting rod, the blocking plate is raised to open the catalyst gap and lowered to close the catalyst gap.

[0017] A shock wave blowing device, comprising a blowpipe directed toward the filter to controllably eject sound waves for blowing soot.

[0018] A catalyst pressure differential monitoring device, comprising,

[0019] A pre-catalytic negative pressure monitoring unit is installed above the SCR denitrification catalyst to measure the pre-catalytic negative pressure data.

[0020] A post-catalytic negative pressure monitoring unit is installed below the SCR denitrification catalyst to measure the post-catalytic negative pressure data.

[0021] In response to the front and rear negative pressure data, the catalyst front and rear pressure difference monitoring device generates pressure difference data;

[0022] The control system is connected to the shock wave soot blowing device, the actuator motor, and the catalyst differential pressure monitoring device.

[0023] In response to the differential pressure data, the control system determines that the dust accumulation on the filter screen exceeds the predetermined range, sends a soot blowing signal to the shock wave soot blowing device to perform a soot blowing operation, and sends a lifting signal to the actuator motor. The blockage plate is lifted along with the connecting rod to open the catalyst gap. Under the dual action of the soot blowing operation and the flow through the opened catalyst gap, the dust passes through the catalyst gap and is discharged from the flue gas outlet.

[0024] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, in response to differential pressure data, the control system determines that the filter screen ash accumulation status has returned to a predetermined range, sends a stop blowing signal to the shock wave soot blowing device to stop the soot blowing operation, and sends a descent signal to the actuator motor, causing the blocking plate to descend with the connecting rod to close the catalyst gap.

[0025] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, the magnitude of the sound wave is positively correlated with the magnitude of the pressure difference data.

[0026] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, the blockage plate is fixedly connected to the connecting rod via a vertical rod.

[0027] In the aforementioned automatic soot removal device for SCR denitrification catalyst in carbon calcination flue gas, the angle of the sound wave ejected by the shock wave blowing device flues up and down based on the tilt angle of the top surface of the filter screen and the SCR denitrification catalyst.

[0028] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, each SCR denitrification catalyst is provided with two filter screens forming a herringbone structure.

[0029] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, the blockage plate is a horizontal plate.

[0030] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, the angle of inclination of the filter screen relative to the top surface of the SCR denitrification catalyst is 20°-80°.

[0031] In the aforementioned automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, the control system includes a PLC or DCS system.

[0032] The operating method of an automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas includes the following steps.

[0033] The front negative pressure monitoring unit measures the front negative pressure data before catalysis, and the rear negative pressure monitoring unit measures the rear negative pressure data after SCR denitrification catalyst catalysis. In response to the front negative pressure data and the rear negative pressure data, the pressure difference monitoring device before and after the catalyst generates pressure difference data.

[0034] In response to the differential pressure data, the control system determines that the dust accumulation on the filter screen exceeds a predetermined range, sends a soot blowing signal to the shock wave soot blowing device to perform a soot blowing operation, and sends a lifting signal to the actuator motor. The shock wave soot blowing device sprays a sound wave of predetermined size and angle toward the filter screen according to the soot blowing signal. The blockage plate is lifted as the connecting rod rotates to open the catalyst gap. Under the dual action of the soot blowing operation and the flow through the opened catalyst gap, the dust passes through the catalyst gap and is discharged from the flue gas outlet.

[0035] In response to the differential pressure data, the control system determines that the filter screen dust accumulation is within a predetermined range, sends a stop blowing signal to the shock wave soot blowing device to stop the soot blowing operation, and sends a descent signal to the actuator motor, causing the blockage plate to descend with the connecting rod to close the catalyst gap.

[0036] In the above technical solution, the automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas provided by the present invention has the following beneficial effects: Compared with the prior art, the present invention is automatically executed, requiring only monitoring personnel to monitor the data and operating status, effectively reducing the ash accumulation and blockage of the SCR denitrification catalyst and surface filter screen caused by flue gas ash accumulation during calcination, and improving the continuous and stable operation of waste heat boilers and environmental protection systems. It effectively alleviates the vicious cycle caused by increased system resistance due to SCR filter screen blockage and deterioration of catalyst operating effect, leading to increased ammonia water consumption for denitrification, increased ammonia escape, and the formation of ammonium bisulfate in flue gas, which further leads to adhesion and blockage of the subsequent heat exchanger tube walls, improving the operating efficiency of waste heat boilers and environmental protection systems, and reducing the frequency of shutdown and maintenance. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0038] Figure 1 This is a schematic diagram of the structure of an automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas under soot blowing operation, provided in an embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of the structure of an automatic ash removal device for SCR denitrification catalyst of carbon calcination flue gas under normal conditions, provided in an embodiment of the present invention.

[0040] Figure 3 This is a schematic diagram of the structure of a lifting movable baffle device for an automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, provided in an embodiment of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this invention, it should be understood that the terms center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "multiple" means two or more, unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms installation, connection, linking, fixing, etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0049] See Figure 1-3 As shown, in one embodiment, the automatic ash removal device for the carbon calcination flue gas SCR denitrification catalyst 2 of the present invention includes,

[0050] The shell 7 has a flue gas inlet 8 for introducing carbon calcination flue gas and a flue gas outlet 9 after desulfurization;

[0051] Multiple SCR denitrification catalysts 2 are arranged laterally in the shell 7 and located between the flue gas inlet 8 and the flue gas outlet 9. There are catalyst gaps 10 between adjacent SCR denitrification catalysts 2 and between the SCR denitrification catalysts 2 and the shell 7.

[0052] Multiple filters 3 filter the carbon calcination flue gas from the flue gas inlet 8. Two filters 3 are arranged at an angle on a single SCR denitrification catalyst 2 to form a triangular structure.

[0053] The lifting movable baffle device 4 includes,

[0054] Actuator 11,

[0055] A first rotating shaft 12, which is drively connected to the actuator 11, extends horizontally and is rotatably supported via a bearing 16.

[0056] The first connecting rod 13 is perpendicularly connected to the first rotating shaft 12 so as to rotate with the first rotating shaft 12.

[0057] Link 14, which is vertically connected to the first connecting rod 13 and remains horizontal, rotates with the first connecting rod 13.

[0058] A blocking plate 17 is disposed over the catalyst gap 10. Based on the rotation of the connecting rod 14, the blocking plate 17 is raised to open the catalyst gap 10 and lowered to close the catalyst gap 10.

[0059] Shockwave blowing device 1, which includes a blowpipe directed toward the filter screen 3 to controllably spray sound waves for blowing soot.

[0060] Catalyst differential pressure monitoring device 5, which includes,

[0061] The pre-catalytic negative pressure monitoring unit 18 is located above the SCR denitrification catalyst 2 to measure the pre-catalytic negative pressure data.

[0062] The post-catalytic negative pressure monitoring unit 19 is located below the SCR denitrification catalyst 2 to measure the post-catalytic negative pressure data.

[0063] In response to the front negative pressure data and the back negative pressure data, the catalyst front and back pressure difference monitoring device 5 generates pressure difference data;

[0064] Control system 6, which is connected to the shock wave soot blowing device 1, the actuator 11, and the catalyst pressure difference monitoring device 5,

[0065] In response to the differential pressure data, the control system 6 determines that the dust accumulation state of the filter screen 3 exceeds the predetermined range, sends a soot blowing signal to the shock wave soot blowing device 1 to perform the soot blowing operation, and sends a lifting signal to the actuator motor 11. The blockage plate 17 is lifted as the connecting rod 14 rotates to open the catalyst gap 10. Under the dual action of the soot blowing operation and the flow through the opened catalyst gap 10, the dust passes through the catalyst gap 10 and is discharged from the flue gas outlet 9.

[0066] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, in response to differential pressure data, the control system 6 determines that the ash accumulation state of the filter screen 3 has returned to a predetermined range, sends a stop blowing signal to the shock wave soot blowing device 1 to stop the soot blowing operation, and sends a descent signal to the actuator motor 11, so that the blocking plate 17 descends with the connecting rod 14 to close the catalyst gap 10.

[0067] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the magnitude of the sound wave is positively correlated with the magnitude of the pressure difference data.

[0068] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the blockage plate 17 is fixedly connected to the connecting rod 14 via a vertical rod 15.

[0069] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the angle of the sound wave ejected by the shock wave blowing device 1 fluctuates up and down based on the tilt angle of the top surface of the filter screen 3 and the SCR denitrification catalyst 2.

[0070] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, two filter screens 3 forming a herringbone structure are provided on a single SCR denitrification catalyst 2.

[0071] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the blockage plate 17 is a horizontal plate.

[0072] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the angle of inclination of the filter screen 3 relative to the top surface of the SCR denitrification catalyst 2 is 20°-80°.

[0073] In a preferred embodiment of the automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas, the control system 6 includes a PLC or DCS system.

[0074] In one embodiment, the automatic ash removal device for the carbon calcination flue gas SCR denitrification catalyst 2 includes an automatically adjustable lifting movable baffle device 4, a shock wave soot blowing device 1, a front and rear pressure difference monitoring device, and a control system 6. Based on the pressure difference before and after the catalyst, the ash accumulation status of the filter screen 3 on the catalyst surface is determined. By adjusting the working state of the lifting movable baffle device 4 and engaging the shock wave soot blowing device 1, the ash accumulation on the surface of the filter screen 3 is effectively cleaned. A large amount of the removed ash does not pass through the catalyst or clog it, improving the ash interception effect of the filter screen 3 and the cleaning effect of the soot blower, achieving an ideal operating state for effectively handling catalyst surface and filter screen 3 clogging.

[0075] In one embodiment, the system monitors the ash accumulation on the catalyst filter screen 3 based on the pressure difference data before and after the catalyst from the pressure difference monitoring device. As ash accumulates on the surface of the catalyst filter screen 3, the pressure difference before and after the catalyst gradually increases. After reaching the set value, the lifting movable baffle device 4 activates, raising the filter screen 3. During the raising process, the catalyst gap 10 between the catalysts is opened. Further, the catalyst gap 10 includes the gap between the catalyst and the furnace wall. The blocking plate 17 also includes a connecting baffle for sealing the gap between the catalyst and the furnace wall. As the flue gas velocity increases instantaneously due to the opening of the gap, a large portion of the ash accumulated on the surface of the new catalyst filter screen 3 is carried away in the gap. At the same time, the shock wave blowing device 1 is activated, and the shock wave jet pipe blows the filter screen 3. After the blowing is completed, the lifting movable baffle device 4 resets. During the reset process, the catalyst gaps between catalysts and between catalysts and furnace walls are closed, and the instantaneous flow velocity of the catalyst flow section increases. This causes the fine dust that has fallen off the filter screen 3 to pass through the catalyst flow section and be carried away with the flue gas, thus achieving the cleaning process of the catalyst and the filter screen 3 on the catalyst surface. After completion, the system returns to stable operating conditions and continues to operate.

[0076] In one embodiment, the filter screen 3 is changed to a triangular filter screen 3 with a 60° tilt angle to facilitate the sliding of surface ash along the angle. It is fixedly placed on the top surface of the catalyst and further supported on the top surface support frame to expand the filtration flow area. At the same time, the distance between the filter screen 3 and the catalyst is increased to prevent the shock wave soot blowing from directly acting on the catalyst surface and causing damage, and to provide space for the modified weakened shock wave soot blowing nozzle. The lifting movable baffle device 4 automatically lifts after the set conditions are met according to the pressure difference before and after the catalyst, and the gaps between catalysts and between the catalyst and the furnace wall are closed, and then links with the shock wave soot blowing device 1 to blow soot, completing the cleaning process.

[0077] In one embodiment, the differential pressure monitoring device controls the shock wave soot blowing device 1 to operate for further soot removal based on the ash accumulation caused by the extended operating cycle and the set value, with manual intervention if necessary. The device achieves effective online treatment of catalyst filter screen 3 and catalyst ash accumulation, eliminating the need to damage the catalyst by directly using shock wave soot blowing or to shut down the waste heat boiler and environmental protection system for cooling and manual cleaning after the ash accumulation reaches a certain severity.

[0078] In one embodiment, the filter screen 3 consists of a filter screen 3 and a support bracket. Increasing the original flat filter screen 3's filtration area and changing it to a triangular design with a 60° tilt angle facilitates the removal of accumulated dust from the filter screen 3 surface during soot blowing. Simultaneously, increasing the distance between the filter screen 3 and the catalyst prevents direct impact of the shock wave soot blowing on the catalyst surface, thus preventing damage and providing space for the modified weakened shock wave soot blowing nozzle. Two negative pressure monitoring points are set before and after the catalyst. The difference in negative pressure before and after the catalyst indicates the clogging status of the catalyst filter screen 3 and the catalyst. For example, after cleaning or with a designed pressure difference of 200 kPa, as the system operates and dust accumulates on the catalyst filter screen 3 surface, the pressure difference will gradually increase. When a certain value is reached, soot blowing is required. The device detects the increase in actual pressure difference and transmits a signal to the DCS system according to the set value. Based on the program settings, the system issues a command to activate the automatically adjustable lifting baffle device 4 and the shock wave soot blowing device 1.

[0079] The operating method of an automatic ash removal device for SCR denitrification catalyst 2 in carbon calcination flue gas includes the following steps.

[0080] The front negative pressure monitoring unit 18 measures the front negative pressure data before catalysis, and the rear negative pressure monitoring unit 19 measures the rear negative pressure data after SCR denitrification catalyst 2 is catalyzed. In response to the front negative pressure data and the rear negative pressure data, the catalyst front and rear pressure difference monitoring device 5 generates pressure difference data.

[0081] In response to the differential pressure data, the control system 6 determines that the dust accumulation state of the filter screen 3 exceeds the predetermined range, sends a soot blowing signal to the shock wave soot blowing device 1 to perform a soot blowing operation, and sends a lifting signal to the actuator motor 11. The shock wave soot blowing device 1 sprays a sound wave of predetermined size and predetermined angle toward the filter screen 3 according to the soot blowing signal. The blockage plate 17 is lifted as the connecting rod 14 rotates to open the catalyst gap 10. Under the dual action of the soot blowing operation and the flow through the opened catalyst gap 10, the dust passes through the catalyst gap 10 and is discharged from the flue gas outlet 9.

[0082] In response to the differential pressure data, the control system 6 determines that the dust accumulation state of the filter screen 3 is within a predetermined range, sends a stop blowing signal to the shock wave soot blowing device 1 to stop the soot blowing operation, and sends a descent signal to the actuator motor 11, so that the blocking plate 17 descends with the connecting rod 14 to close the catalyst gap 10.

[0083] Finally, it should be noted that the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0084] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas, characterized in that, It includes: The shell has a flue gas inlet for introducing carbon calcination flue gas and a flue gas outlet after denitrification; Multiple SCR denitrification catalysts are arranged laterally in the shell and located between the flue gas inlet and the flue gas outlet. There are catalyst gaps between adjacent SCR denitrification catalysts and between the SCR denitrification catalysts and the shell. Multiple filters are used to filter the carbon calcination flue gas from the flue gas inlet. Two filters are arranged at an angle on a single SCR denitrification catalyst to form a triangular structure. A lifting movable baffle device includes, Actuating motor, A first rotating shaft, which is drively connected to the actuator motor, extends horizontally and is rotatably supported via bearings. A first connecting rod is perpendicularly connected to the first rotating shaft to rotate with the first rotating shaft. A connecting rod, which is vertically connected to the first connecting rod and remains horizontal, rotates with the first connecting rod. A blocking plate is disposed over the catalyst gap. Based on the rotation of the connecting rod, the blocking plate is raised to open the catalyst gap and lowered to close the catalyst gap. A shock wave blowing device, comprising a blowpipe directed toward the filter to controllably eject sound waves for blowing soot. A catalyst pressure differential monitoring device, comprising, A pre-catalytic negative pressure monitoring unit is installed above the SCR denitrification catalyst to measure the pre-catalytic negative pressure data. A post-catalytic negative pressure monitoring unit is installed below the SCR denitrification catalyst to measure the post-catalytic negative pressure data. In response to the front and rear negative pressure data, the catalyst front and rear pressure difference monitoring device generates pressure difference data; The control system is connected to the shock wave soot blowing device, the actuator motor, and the catalyst differential pressure monitoring device. The angle of the sound waves ejected by the shock wave blowing device fluctuates up and down based on the tilt angle of the top surface of the filter and the SCR denitrification catalyst. Each SCR denitrification catalyst has two filters forming a herringbone structure.

2. The automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to claim 1, characterized in that, The magnitude of the sound wave is directly related to the magnitude of the pressure difference data.

3. The automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to claim 1, characterized in that, The blocking plate is fixedly connected to the connecting rod via a vertical rod.

4. The automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to claim 1, characterized in that, The blocking plate is a horizontal plate.

5. The automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to claim 1, characterized in that, The filter screen is tilted at an angle of 20°-80° relative to the top surface of the SCR denitrification catalyst.

6. The automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to claim 1, characterized in that, The control system includes a PLC or DCS system.

7. The operating method of the automatic ash removal device for SCR denitrification catalyst in carbon calcination flue gas according to any one of claims 1-6, characterized in that, It includes the following steps, The front negative pressure monitoring unit measures the front negative pressure data before catalysis, and the rear negative pressure monitoring unit measures the rear negative pressure data after SCR denitrification catalyst catalysis. In response to the front negative pressure data and the rear negative pressure data, the pressure difference monitoring device before and after the catalyst generates pressure difference data. In response to the differential pressure data, the control system determines that the dust accumulation on the filter screen exceeds a predetermined range, sends a soot blowing signal to the shock wave soot blowing device to perform a soot blowing operation, and sends a lifting signal to the actuator motor. The shock wave soot blowing device sprays a sound wave of predetermined size and angle toward the filter screen according to the soot blowing signal. The blockage plate is lifted as the connecting rod rotates to open the catalyst gap. Under the dual action of the soot blowing operation and the flow through the opened catalyst gap, the dust passes through the catalyst gap and is discharged from the flue gas outlet. In response to the differential pressure data, the control system determines that the filter screen dust accumulation is within a predetermined range, sends a stop blowing signal to the shock wave soot blowing device to stop the soot blowing operation, and sends a descent signal to the actuator motor, causing the blockage plate to descend with the connecting rod to close the catalyst gap.

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