Fuel gas SCR (Selective Catalytic Reduction) denitration catalyst module

Abstract

The invention relates to the technical field of denitration catalyst modules, in particular to a gas flue gas SCR denitration catalyst module which comprises a structural frame with a square tube channel, and the two ends of the square tube channel are the gas inlet end and the gas outlet end respectively; the plurality of transverse components and the plurality of vertical components are alternately connected at a right angle of 90 degrees to form a continuous rectangular wave-shaped catalytic unit module; the catalytic unit modules are arranged in the square tube channels, the catalytic unit modules and the square tube channels jointly define a plurality of longitudinal main channels arranged in parallel, and a transverse channel is arranged between any two adjacent longitudinal main channels. A convection and side flow combined mode is formed by utilizing aperture difference, and the peak regulation working condition of the gas turbine generator set can be adapted by utilizing switching of the longitudinal main channel.

Description

Technical Field

[0001] This invention relates to the technical field of denitrification catalyst modules, specifically a gas-fired SCR denitrification catalyst module. Background Technology

[0002] With the increasing proportion of gas turbines and gas boilers in the power system, especially the widespread application of peak-shaving units, the requirements for flue gas denitrification systems are becoming increasingly stringent. Selective catalytic reduction (SCR) technology is currently the most mature and efficient denitrification method, and its core component is the SCR catalyst. Existing SCR catalysts are mainly divided into three categories: honeycomb, plate, and corrugated plate. Honeycomb catalysts mainly have square or regular polygonal honeycomb channels, corrugated plate catalysts have approximately single-peak waveform channels, and plate catalysts have narrow rectangular channels. The flue gas passing through the catalyst mainly flows in a straight axial direction. Although the structure is simple, the axial flow leads to a short contact time between the gas and the catalyst wall and low mass transfer efficiency. Especially under high flue gas velocity conditions or fluctuating operating conditions, the denitrification efficiency of the catalyst must be stably maintained at over 90% or even higher to meet the national requirements for ultra-low NOx emissions. This necessitates increasing the amount of catalyst used, which leads to a sharp increase in catalyst pressure loss.

[0003] Currently, flue gas flowing through honeycomb, flat plate, and corrugated plate catalyst modules still primarily exhibits uniaxial flow, lacking effective lateral mixing. This results in significant concentration gradients within the catalyst channels, leading to vigorous front-end reactions and insufficient utilization at the rear, resulting in low overall catalyst utilization, shortened lifespan, and increased ammonia escape risk. In scenarios involving frequent start-ups and shutdowns of gas-fired peak-shaving units and significant load fluctuations, these existing modules struggle to simultaneously achieve high denitrification efficiency and low system pressure drop, often exhibiting the following technical defects: First, the single gas flow path results in weak lateral diffusion and low catalyst utilization, typically only 60-75%. Second, to ensure denitrification efficiency, it is necessary to increase the catalyst loading or flue gas velocity, leading to a significant increase in system pressure drop, often exceeding 800-1200 Pa, increasing induced draft fan energy consumption. Finally, insufficient lateral mixing at low loads and low flow rates significantly reduces denitrification efficiency; excessive pressure drop at high loads affects the safe operation of the unit. Summary of the Invention

[0004] This invention provides a gas-fired SCR denitrification catalyst module, which constructs a convection channel through a continuous rectangular wave structure, significantly reducing pressure loss. It utilizes differences in pore size or thickness to form a combination of convection and side flow, and can also adapt to peak-shaving conditions by switching the longitudinal main channel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A gas-fired SCR denitrification catalyst module includes: The structure has a square tube channel, with the two ends of the square tube channel being the air inlet and the air outlet, respectively; horizontal and vertical components, multiple of which are alternately connected at 90° right angles to form a continuous rectangular wave-shaped catalytic unit module; the catalytic unit module is disposed within the square tube channel and together with it encloses multiple parallel longitudinal main channels, and a horizontal channel is formed between any two adjacent longitudinal main channels.

[0006] Optionally, the transverse component is a transverse catalyst plate, which can be any type of catalyst, such as honeycomb, flat plate, or corrugated plate. The vertical component is a vertical catalyst plate, which can be any type of catalyst, such as honeycomb, flat plate, or corrugated plate. The aperture of the transverse component is less than or equal to the aperture of the vertical component, or the thickness of the transverse component is greater than or equal to the thickness of the vertical component.

[0007] Optionally, a guide groove is provided at the top of the structural frame, and an assembly block is slidably installed in the guide groove. The sliding path of the assembly block coincides with the path of the longitudinal main channel, and the bottom of the assembly block is fixedly connected to the top of the transverse member. The assembly block can slide along the extension direction of the longitudinal main channel, so that the transverse member moves to a preset alternating position. When the transverse member slides to the alternating position, the shape of the two adjacent longitudinal main channels is switched, restoring the initial 180° rotation symmetrical state.

[0008] Optionally, a traction channel is pre-set at the top of the structural frame, and a second pull rope is pre-embedded in the traction channel. One end of the second pull rope is fixedly connected to the outer wall of the assembly block after a U-shaped turn. A first pull rope slides through the outer wall of the structural frame. One end of the first pull rope extends into the guide groove and is fixedly connected to the outer wall of the assembly block. Both the first pull rope and the second pull rope can be associated with an external winch to control the sliding and locking of the assembly block.

[0009] Optionally, a detection component can be assembled within the longitudinal main channel. The detection component includes a reaction carrier that can be fixedly installed within the longitudinal main channel. The reaction carrier is designed with an approach structure. Under the action of an external structure, the approach structure can be displaced into the channel of the vertical component. The approach structure includes a linkage column, which is a columnar structure. Multiple probes are installed at the front end of the linkage column. The multiple probes are distributed in a circumferential array and can extend into the channel of the vertical component.

[0010] Optionally, the reaction carrier includes an assembly plate with multiple cylindrical grooves. A pressure sensor is fixedly installed at the bottom of the cylindrical groove. The proximity structure is slidably installed inside the cylindrical groove. A functional spring is fixedly installed between the bottom of the linkage column and the pressure surface of the pressure sensor.

[0011] Optionally, the reaction carrier includes an assembly cylinder with multiple embedded grooves along its diameter. The linkage column is slidably assembled inside the embedded grooves, and the embedded grooves are fitted with damping inner sleeves to limit the displacement of the linkage column. A PVDF piezoelectric film-wrapped sensor is installed inside the assembly cylinder along its axis, and the annular outer wall of the PVDF piezoelectric film-wrapped sensor is a pressure surface.

[0012] Optionally, a right-angle notch is reserved at the connection between the horizontal member and the vertical member. An angle iron filler strip is installed at the right-angle notch. One right-angle outer wall of the angle iron filler strip is fixedly connected to the outer wall of the end of the vertical member. The other right-angle outer wall of the angle iron filler strip is tightly fitted to the outer wall of the horizontal member. The two ends of the inclined outer wall of the angle iron filler strip are respectively connected to the outer walls of the horizontal member and the vertical member to form a guiding inclined surface. A heat-resistant sealing sleeve is wrapped around the right-angle outer wall of the angle iron filler strip.

[0013] This invention provides a gas-fired SCR denitrification catalyst module, which has the following advantages compared to the prior art:

[0014] I. By designing a continuous rectangular wave-shaped catalytic unit module, the path characteristics of the continuous rectangular wave are utilized to create differences in the positions of the transverse components in adjacent longitudinal main channels. This results in differences in the air velocity and pressure flowing through each longitudinal main channel, which forces the gas that originally flows longitudinally to flow laterally. This increases the contact opportunities and path between the flue gas and the catalyst surface, and also expands the actual flow area of ​​the flue gas through the lateral flow structure. Thus, while ensuring denitrification efficiency, it effectively solves the problem of excessive pressure loss caused by the high specific surface area of ​​small channels under the traditional single flow path.

[0015] Second, by setting the transverse components as transverse catalyst plates with smaller apertures and the vertical components as vertical catalyst plates with larger apertures, when the flue gas flows in the longitudinal main channel and impacts the transverse catalyst plate at the end, the slightly smaller aperture creates a certain flow resistance, forcing the flue gas to actively seek a path with less resistance to escape, thus more smoothly entering the channels of the vertical catalyst plate with larger apertures. Based on the original longitudinal flow, transverse side flow is realized more efficiently. This not only increases the contact reaction time between the flue gas and the vertical catalyst plate, but also further optimizes the overall pressure drop, enhances the full and uniform mixing of reactants in the flue gas, and improves the effective utilization rate and conversion rate of the catalyst.

[0016] Third, the controllable position of the transverse components enables the switching of the longitudinal main channel. Before and after the switching of the longitudinal main channel, the direction of the transverse displacement of the flue gas will also change accordingly. Flue gas can enter from both ends of the vertical catalyst plate channel, thereby effectively improving the utilization efficiency of the vertical catalyst plate and also improving the denitrification efficiency of the flue gas. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the external structure of the present invention without the driving structure; Figure 2 This is a three-dimensional structural diagram of the exterior of the present invention; Figure 3 For the present invention Figure 1 The front view; Figure 4 For the present invention along Figure 3 A schematic diagram of the structure viewed in section AA; Figure 5 For the present invention along Figure 3 A structural schematic diagram of the cross-section at point BB; Figure 6 This is a schematic diagram of the structure of the reaction carrier in Example 1 of the present invention; Figure 7 This is a schematic diagram of the structure of the reaction carrier in Example 2 of the present invention; Figure 8 For the present invention Figure 7 The right view; Figure 9 For the present invention along Figure 8 A structural schematic diagram showing the cross-section at the CC section; Figure 10 This is a schematic diagram of the external three-dimensional structure of the longitudinal main channel switching state in this invention.

[0018] In the diagram: 1. Structural frame; 2. Horizontal component; 3. Vertical component; 4. Angle iron filler strip; 5. Heat-resistant sealing sleeve; 6. First pull rope; 7. Assembly block; 8. Guide groove; 9. Second pull rope; 11. Pressure sensor; 12. Linkage column; 13. Functional spring; 14. Probe; 15. Assembly plate; 16. Assembly cylinder; 17. Damping inner sleeve; 18. PVDF piezoelectric film wrapped sensor. Detailed Implementation

[0019] 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, and 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.

[0020] Please see Figures 1 to 10 This invention provides a technical solution: a gas-fired SCR denitrification catalyst module, comprising: The structure frame 1 has a square tube channel, with the two ends of the square tube channel being the air inlet and the air outlet, respectively; horizontal components 2 and vertical components 3, multiple horizontal components 2 and vertical components 3 are alternately connected at 90° right angles to form a continuous rectangular wave-shaped catalytic unit module; the catalytic unit module is set inside the square tube channel and together with it encloses multiple parallel longitudinal main channels, and a horizontal channel is formed between any two adjacent longitudinal main channels.

[0021] In existing technologies, the gas flow path is single, the lateral diffusion capacity is weak, and the effective utilization rate of the catalyst is low, typically only 60% to 75%. Furthermore, to ensure denitrification efficiency, it is necessary to increase the catalyst loading or the flue gas velocity, which leads to a significant increase in system pressure drop and increased induced draft fan energy consumption. Therefore, in order to reduce pressure loss and ensure efficiency, the denitrification catalyst module is designed as a continuous rectangular wave, thus forming multiple linearly arranged longitudinal main channels. Two adjacent longitudinal main channels are separated only by a vertical component 3. However, due to the continuous rectangular path, the positions of the two lateral components 2 in the two adjacent longitudinal main channels are different, resulting in different air velocity and pressure in the longitudinal main channels. This leads to a pressure difference between the two adjacent longitudinal main channels, i.e., Bernoulli's principle, which enables the flowing gas to undergo transverse flow, allowing the gas to form two-dimensional convection between the longitudinal main channels and the lateral channels, thereby reducing pressure loss and improving the denitrification efficiency of the flue gas.

[0022] Among the more important ones, such as Figure 1 The catalyst plate channels shown are circular, but they can also be square, single-peak waveform, or narrow rectangle, which can be adjusted according to the application environment, specific flue conditions, and denitrification conditions.

[0023] In a preferred embodiment, the transverse component 2 is a transverse catalyst plate, which can be any type of catalyst, such as honeycomb, flat plate, or corrugated plate (hereinafter the same). The vertical component 3 is a vertical catalyst plate. The aperture of the transverse component 2 is smaller than that of the vertical component 3. In this embodiment, when the flue gas flows in the longitudinal main channel, when it impacts the transverse catalyst plate at the end of the flow path, the slightly smaller aperture of the transverse catalyst plate forces the flue gas to escape to find a transverse path, thereby entering the aperture of the vertical catalyst plate and further realizing side-flow denitrification. The cooperation between the transverse catalyst plate and the vertical catalyst plate forms a combination of convection and side-flow. At the same time, the side-flow structure can increase the flow area of ​​the flue gas, reduce pressure loss, and also solve the pressure loss problem caused by the high specific surface area of ​​the small channel.

[0024] In a preferred embodiment, a guide groove 8 is provided at the top of the structural frame 1, and an assembly block 7 is slidably installed within the guide groove 8. The sliding path of the assembly block 7 coincides with the path of the longitudinal main channel, and the bottom of the assembly block 7 is fixedly connected to the top of the transverse member 2. The assembly block 7 can slide along the extension direction of the longitudinal main channel, causing the transverse member 2 to move to a preset alternating position. When the transverse member 2 slides to the alternating position, the shape of the two adjacent longitudinal main channels is switched, restoring the initial 180° rotational symmetrical state. Please refer to [link to relevant documentation]. Figure 4 and Figure 10 , Figure 10 The display shows the state before and after the longitudinal main channel switching. Figure 4 The dashed boxes within the longitudinal main channel indicate alternating positions. In existing technologies, under peak-shaving conditions, temperature and flow fluctuate drastically, and the existing fixed structure cannot adapt dynamically. This leads to catalyst overload and blockage at the front end, and idleness at the rear end. By designing the displacement of the transverse component 2, the state of the longitudinal main channel can be altered, thus changing the flow pressure or velocity of the flue gas within the longitudinal channel. Specifically, in a continuous rectangular wave-shaped catalytic unit module, due to the asymmetrical position of the transverse component 2, the geometry of adjacent longitudinal main channels is not perfectly mirrored, resulting in uneven pressure distribution after intake. Long-term operation exacerbates local blockage and uneven catalyst utilization. The displacement of the transverse component 2 in this embodiment… The usage state of the longitudinal channels can be changed, so that the transverse catalyst plates in each longitudinal main channel can be evenly pressurized. This slightly reduces the resistance of channels with higher pressure and slightly increases the resistance of channels with lower pressure, making the pressure drop of adjacent channels more consistent. Secondly, the positions of multiple transverse components 2 can be uniformly adjusted to keep them in the same position, eliminating the continuous rectangular wave state. At this time, the flue gas flow rate or flow pressure of multiple longitudinal main channels is consistent, thus adapting to the dynamic operating conditions of the peak-shaving unit. At low load, appropriate displacement increases the resistance of the transverse channels, thereby strengthening the side flow and improving efficiency. At high load, displacement reduces the resistance of the transverse channels, reduces the total pressure loss, and protects the fan.

[0025] Based on the embodiment of alternating displacement of transverse component 2, an embodiment of a driving structure is provided. A traction channel is pre-set at the top of the structural frame 1, and a second pull rope 9 is pre-embedded in the traction channel. One end of the second pull rope 9 is U-shaped and fixedly connected to the outer wall of the assembly block 7. A first pull rope 6 slides through the outer wall of the structural frame 1. One end of the first pull rope 6 extends into the guide groove 8 and is fixedly connected to the outer wall of the assembly block 7. Both the first pull rope 6 and the second pull rope 9 can be associated with an external winch to control the sliding and locking of the assembly block 7. Please refer to [link to relevant documentation]. Figure 5The enlarged view shows that by controlling the first and second pull ropes, the position of the assembly block in the guide groove can be adjusted, thereby controlling the displacement of the transverse components to achieve the switching of the longitudinal main channel or to release the continuous rectangular wave state to adapt to the peak shaving unit.

[0026] More importantly, the direction of the lateral displacement of the flue gas will also change relative to the longitudinal channel switching. Flue gas can enter from both ends of the vertical catalyst plate channel, thereby effectively improving the utilization efficiency of the vertical catalyst plate and the denitrification efficiency of the flue gas.

[0027] Based on the embodiment of alternating displacement of transverse component 2, an implementation scheme for a detection assembly is provided. A detection component can be assembled within the longitudinal main channel. The detection component includes a reaction carrier that can be fixedly installed within the longitudinal main channel. The reaction carrier is designed with an approach structure, which can be displaced into the channel of the vertical component 3 under the action of an external structure. The approach structure includes a linkage column 12, which is a columnar structure. Multiple probes 14 are installed at the front end of the linkage column 12, arranged in a circumferential array. The probes 14 can extend into the channel of the vertical component 3. In this embodiment, when it is necessary to switch the state of the longitudinal main channel... It is necessary to detect crystallization blockage and other issues in the three channels of the vertical component. In the field of industrial SCR, blockage at the inlet end is the most direct macroscopic manifestation of preferential deactivation at the front end of the channel. At this time, the pressure drop increases locally, the flow area decreases, and the denitrification efficiency begins to decline. When the transversely flowing flue gas over-reacts the front end of the vertical catalyst plate channel, the channel needs to be reversed. However, the vertical catalyst plate is difficult to rotate. By utilizing the displacement of the transverse catalyst plate and Bernoulli's action, the pressure values ​​in two adjacent longitudinal main channels can be swapped, thereby changing the flow direction of the flue gas and ultimately maximizing the utilization of the vertical catalyst plate channel.

[0028] The specific detection process involves using external equipment to control the approach structure to move closer, allowing multiple probes 14 to enter the channel. The blocking strength is used to determine the blockage at the front end of the channel, and further to determine whether the position of the transverse component 2 needs to be changed.

[0029] Examples of two reaction carriers are provided. Example 1:

[0030] The reaction carrier includes an assembly plate 15, on which multiple cylindrical grooves are formed. A pressure sensor 11 is fixedly installed at the bottom of each cylindrical groove. A proximity structure is slidably installed inside the cylindrical groove. A functional spring 13 is fixedly installed between the bottom of the linkage column 12 and the pressure surface of the pressure sensor 11. (See also...) Figure 6In this embodiment, multiple test points need to be designed, preferably with representative channels. When a blockage occurs in a representative channel, the test result can be determined. Secondly, regional testing can also be carried out according to the channel distribution of the vertical catalyst plate. For example, multiple adjacent structures distributed in an array can simultaneously detect the blockage in a unit area, and the data performance of the pressure sensor 11 can be used to make a judgment. Example 2:

[0031] The reaction carrier includes an assembly cylinder 16, which has multiple embedded grooves along its diameter. A linkage column 12 is slidably assembled inside these grooves, and a damping inner sleeve 17 is installed within each groove to limit the displacement of the linkage column 12. A PVDF piezoelectric film-wrapped sensor 18 is mounted inside the assembly cylinder 16 along its axis. The annular outer wall of the PVDF piezoelectric film-wrapped sensor 18 is a pressure surface. Please refer to [link / reference]. Figures 7 to 9 In this embodiment, the assembly cylinder 16 can be rotated upward by an external structure to insert the proximity structure into the channel, and then rolled up and down, so that the proximity structure can comprehensively test the blockage of the channel. This is suitable for more precise industrial applications. The working principle of the PVDF piezoelectric film wrapped sensor 18 is that a large PVDF piezoelectric film is tightly wrapped around the outer wall of the cylinder. The film itself is a continuous piezoelectric material. Pressure at any point will cause local deformation of the film and generate an electric charge signal, which can be detected by leading out the lead wire.

[0032] In summary, further, a right-angle notch is reserved at the connection between the horizontal member 2 and the vertical member 3. An angle iron filler strip 4 is installed at the right-angle notch. One right-angled outer wall of the angle iron filler strip 4 is fixedly connected to the outer wall of the end of the vertical member 3, and the other right-angled outer wall of the angle iron filler strip 4 is tightly fitted to the outer wall of the horizontal member 2. The two ends of the inclined outer wall of the angle iron filler strip 4 are respectively connected to the outer walls of the horizontal member 2 and the vertical member 3 to form a guiding inclined surface. Furthermore, a heat-resistant sealing sleeve 5 is wrapped around the right-angled outer wall of the angle iron filler strip 4. (See also...) Figure 4 Detailed magnified images and Figure 10 In this embodiment, the angle iron filler strip 4 is designed to improve the robustness of the entire module, while its guide slope provides guidance and diversion for flue gas entering the longitudinal main channel.

[0033] By utilizing the combination of the above structures, a convection channel can be constructed through a continuous rectangular wave structure, which significantly reduces pressure loss. The difference in aperture can be used to form a combination of convection and lateral flow. The switching of the longitudinal main channel can also be used to adapt to peak shaving conditions.

[0034] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the specification and drawings can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas SCR denitrification catalyst module, characterized in that: include: A structural frame with a square tube channel (1), the two ends of the square tube channel are the air inlet and the air outlet, respectively; The horizontal component (2) and the vertical component (3) are connected alternately at 90° right angles to form a continuous rectangular wave-shaped catalytic unit module; The catalytic unit module is disposed within the square tube channel and together with it forms multiple parallel longitudinal main channels, and a transverse channel is provided between any two adjacent longitudinal main channels.

2. The flue gas SCR denitrification catalyst module according to claim 1, characterized in that: The transverse component (2) is a transverse catalyst plate, and the vertical component (3) is a vertical catalyst plate. The aperture of the transverse component (2) is smaller than that of the vertical component (3).

3. The flue gas SCR denitrification catalyst module according to claim 1, characterized in that: The top of the structural frame (1) is provided with a guide groove (8), and an assembly block (7) is slidably installed in the guide groove (8). The sliding path of the assembly block (7) is consistent with the path direction of the longitudinal main channel, and the bottom of the assembly block (7) is fixedly connected to the top of the transverse member (2). The assembly block (7) can slide along the extension direction of the longitudinal main channel, so that the transverse component (2) can move to a preset alternating position; When the transverse member (2) slides to the alternating position, the shape of the two adjacent longitudinal main channels is switched and restored to the initial 180° rotation symmetrical state.

4. The gas-fired SCR denitrification catalyst module according to claim 3, characterized in that: The top of the structural frame (1) is pre-set with a traction channel. A second pull rope (9) is pre-embedded in the traction channel. One end of the second pull rope (9) is fixedly connected to the outer wall of the assembly block (7) after a U-shaped turn. A first pull rope (6) slides through the outer wall of the structural frame (1). One end of the first pull rope (6) extends into the guide groove (8) and is fixedly connected to the outer wall of the assembly block (7). Both the first pull rope (6) and the second pull rope (9) can be associated with an external winch to control the sliding and locking of the assembly block (7).

5. The gas-fired SCR denitrification catalyst module according to claim 3, characterized in that: The longitudinal main channel can be equipped with a detection component. The detection component includes a reaction carrier that can be fixedly installed in the longitudinal main channel. The reaction carrier is designed with an approach structure. The approach structure can be displaced into the channel of the vertical component (3) under the action of the external structure. The approach structure includes a linkage column (12). The linkage column (12) is a columnar structure. Multiple probes (14) are installed at the front end of the linkage column (12). The multiple probes (14) are distributed in a circumferential array. The probes (14) can extend into the channel of the vertical component (3).

6. The gas-fired SCR denitrification catalyst module according to claim 5, characterized in that: The reaction carrier includes an assembly plate (15), on which multiple cylindrical grooves are provided. A pressure sensor (11) is fixedly installed at the bottom of the cylindrical groove. The proximity structure is slidably installed inside the cylindrical groove. A functional spring (13) is fixedly installed between the bottom of the linkage column (12) and the pressure surface of the pressure sensor (11).

7. The gas-fired SCR denitrification catalyst module according to claim 5, characterized in that: The reaction carrier includes an assembly cylinder (16), which has multiple embedded grooves along its diameter. The linkage column (12) is slidably assembled inside the embedded grooves, and the embedded grooves are equipped with a damping inner sleeve (17) to limit the displacement of the linkage column (12). A PVDF piezoelectric film wrapped sensor (18) is installed inside the assembly cylinder (16) along its axis. The annular outer wall of the PVDF piezoelectric film wrapped sensor (18) is a pressure surface.

8. The gas-fired SCR denitrification catalyst module according to any one of claims 1-7, characterized in that: A right-angle notch is reserved at the connection between the horizontal member (2) and the vertical member (3). An angle iron filler strip (4) is installed at the right-angle notch. One right-angle outer wall of the angle iron filler strip (4) is fixedly connected to the outer wall of the end of the vertical member (3). The other right-angle outer wall of the angle iron filler strip (4) is tightly fitted to the outer wall of the horizontal member (2). The two ends of the inclined outer wall of the angle iron filler strip (4) are respectively connected to the outer walls of the horizontal member (2) and the vertical member (3) to form a guiding inclined surface. A heat-resistant sealing sleeve (5) is wrapped around the right-angle outer wall of the angle iron filler strip (4).

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