Catalytic recovery equipment for petrochemical tail gas

Abstract

The utility model relates to tail gas catalytic recovery technical field, concretely relates to petroleum chemical tail gas catalytic recovery equipment, include: box assembly, it includes catalytic tank and base, the catalytic tank one side wall top is provided with the input pipe, and the bottom of opposite other side wall is provided with the output pipe, catalytic assembly, it includes setting in the catalytic tank inside at least one catalytic plate, the catalytic plate includes the catalytic region for placing catalytic material and the turbulence hole region for the tail gas flow after catalysis to the catalytic plate below, the turbulence hole region is provided with a plurality of turbulence holes, support lifting assembly, it sets up in the catalytic tank inside, is used for fixing and lifting the catalytic plate, through above setting, can control the flow path of tail gas, ensure that the tail gas of waiting for catalyzing can fully contact catalytic material, effectively improved catalytic effect, makes it when being applied to the tail gas of catalyzing different components, can all ensure the catalytic efficiency and catalytic effect of high efficiency.

Description

Technical Field

[0001] This utility model relates to a catalytic recovery device for petrochemical tail gas, belonging to the field of tail gas catalytic recovery technology. Background Technology

[0002] Petrochemical production processes generate large amounts of complex exhaust gases, which contain both valuable recyclable components and pollutants harmful to the environment. Catalytic recovery equipment uses a catalyst placed in the catalytic chamber to cause specific chemical reactions in the exhaust gases as they flow through the catalyst, thereby achieving the conversion and recovery of target substances.

[0003] Currently, exhaust gas catalytic recovery equipment adopts a fixed catalytic bed structure. This structure is simplistic, and several problems have been found during its use that need to be improved:

[0004] First, the catalyst bed in existing catalytic recovery equipment is fixed in position and cannot be moved. The gas flow path formed by it is unchanging. When the tail gas flow rate, composition or reaction load changes, it cannot adjust the gas flow path according to different operating conditions, resulting in poor applicability and poor catalytic effect.

[0005] Secondly, existing catalytic recovery equipment lacks convenience in terms of maintenance. The loading, replacement, and cleaning of catalysts, as well as the repair of seals inside the reactor, usually require complex disassembly processes, resulting in long downtime for equipment maintenance and affecting production efficiency and continuity. Therefore, researching a new type of petrochemical tail gas catalytic recovery equipment is of great practical significance. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing a catalytic recovery device for petrochemical tail gas.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a petrochemical tail gas catalytic recovery equipment, characterized in that it includes: a box assembly, which includes a catalytic box and a base, a sealed door is provided at the front opening of the catalytic box, the base is fixedly connected to the bottom of the catalytic box, an input pipe is provided at the top of one side wall of the catalytic box, and an output pipe is provided at the bottom of the opposite side wall.

[0008] A catalytic assembly includes at least one catalytic plate disposed inside the catalytic chamber, an input pipe located above the catalytic plate, an output pipe located below the catalytic plate, the catalytic plate including a catalytic region for placing catalytic substances and a turbulence hole region for the catalytically catalyzed exhaust gas to flow to the area below the catalytic plate, the turbulence hole region being provided with several turbulence holes;

[0009] A lifting support assembly is provided inside the catalytic converter box to fix and lift the catalytic plate.

[0010] Furthermore, the supporting lifting assembly includes lifting columns disposed opposite to the inner surfaces of the two side walls of the catalyst tank, a lifting frame slidably sleeved on the lifting column, and the lifting frame being fixed at a preset position of the lifting column by a limiting assembly;

[0011] The lifting frame includes a left sliding plate and a right sliding plate, and a base plate that connects the left sliding plate and the right sliding plate respectively. The left sliding plate and the right sliding plate have the same structure, and both have openings for accommodating the lifting column at the positions corresponding to the lifting column. The lifting frame is provided with a fixing part for installing the catalytic plate. The left sliding plate, the right sliding plate and the base plate are all provided with sealing gaskets on the side near the inner side of the catalytic chamber. When the lifting frame is installed in place, the sealing gaskets provided on the left sliding plate, the right sliding plate and the base plate abut against the inner side of the catalytic chamber.

[0012] Furthermore, the limiting component includes a plurality of insertion holes equally spaced on the lifting column, and limiting seats respectively disposed on the left sliding plate and the right sliding plate, wherein the limiting seats are provided with limiting portions adapted to the insertion holes.

[0013] Furthermore, the limiting part is a pin inserted into the limiting seat. By inserting the pin into the socket, the lifting frame is fixed at a preset position of the lifting column.

[0014] Furthermore, the limiting part includes a connecting block disposed within the limiting seat. One side of the connecting block is provided with a pull rod extending through to the outside of the limiting seat and two guide rods located at both ends of the pull rod and slidingly cooperating with the limiting seat. A spring is sleeved on the guide rod. One end of the spring abuts against the inner side of the connecting seat and the other end abuts against the connecting block. A pin that cooperates with the insertion hole is disposed on the other side of the connecting block.

[0015] Furthermore, the fixing part is a slide bar respectively disposed on the opposite sides of the left slide plate and the right slide plate, the free ends of the slide bar extend upward and downward respectively to form flanges, and the corresponding position of the catalyst plate is provided with a slide groove that slides and engages with the slide bar;

[0016] A sealing gasket is provided on the side of the base plate near the catalytic plate. When the catalytic plate is installed in place, the catalytic plate abuts against the sealing gasket on the side of the base plate near the catalytic plate.

[0017] Furthermore, the catalytic region is located on one side of the catalytic plate, the turbulence hole region is located on the other side of the catalytic plate, and six catalytic plates are arranged in a vertical array inside the catalytic chamber, with the turbulence hole regions of adjacent catalytic plates staggered left and right.

[0018] Furthermore, the turbulence orifice includes a contraction section and an expansion section. The cross-sectional area of ​​the contraction section gradually decreases along the exhaust gas flow direction, while the cross-sectional area of ​​the expansion section gradually increases along the exhaust gas flow direction. The large opening side of the contraction section is connected to the upper surface of the catalytic plate, and the large opening side of the expansion section is connected to the lower surface of the catalytic plate. The small opening side of the contraction section is connected to the small opening side of the expansion section. The side of the expansion section near the catalytic region is a vertically downward straight structure.

[0019] Furthermore, after the catalyst plate and the lifting frame are installed in place, their front surfaces near the sealed door are flush and both are provided with sealing gaskets.

[0020] The sealed door is provided with locking strips on the left and right sides behind it. The free ends of the locking strips extend to the left and right respectively with flanges. The catalytic box has a locking groove that matches the position of the locking strip. The lower inner side of the sealed door is rounded.

[0021] Furthermore, a first magnetic block is embedded in the top and bottom of the catalytic chamber, and a second magnetic block is embedded in the sealed door at the position corresponding to the first magnetic block, which is magnetically attracted to it.

[0022] The beneficial effects of this utility model are as follows: Through the above settings, catalytic recovery of petrochemical tail gas is achieved. Furthermore, by limiting the arrangement of the input and output pipes and dividing the catalytic plate area, the flow path of the tail gas can be controlled to ensure that the tail gas to be catalyzed can fully contact the catalytic substance, effectively improving the catalytic effect. Secondly, by setting up a support lifting component, the height of the catalytic plate can be adaptively adjusted according to the different components in the tail gas and the catalytic reaction characteristics of different catalytic substances. This not only further plans the flow path of the tail gas and achieves dynamic adaptation of the tail gas flow path, further ensuring the catalytic effect, but also effectively improves the applicability of the catalytic recovery equipment described in this application. It solves the problem that traditional fixed catalytic equipment cannot adapt to different working conditions, ensuring high catalytic efficiency and catalytic effect when applied to catalyze tail gas with different components. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the catalytic recovery equipment provided in an embodiment of the present utility model;

[0024] Figure 2 A three-dimensional structural diagram of a catalytic recovery device for disassembling a sealed door, provided for an embodiment of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the lifting frame provided in an embodiment of the present utility model;

[0026] Figure 4 for Figure 2Enlarged view at point B in the middle;

[0027] Figure 5 This is a schematic cross-sectional view of the limiting part provided in an embodiment of the present utility model;

[0028] Figure 6 This is a three-dimensional structural diagram of the catalytic plate provided in an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of the turbulence hole provided in an embodiment of the present utility model;

[0030] Figure 8 for Figure 1 Enlarged view of point A in the middle.

[0031] Reference numerals: 1. Catalytic converter; 2. Base; 3. Sealed door; 4. Input pipe; 5. Output pipe; 6. Catalytic plate; 61. Catalytic zone; 62. Baffle hole zone; 621. Baffle hole; 6211. Contraction section; 6212. Expansion section; 7. Lifting column; 71. Insertion hole; 8. Lifting frame; 81. Left sliding plate; 82. Right sliding plate; 83. Base plate; 84. Opening slot; 9. Limiting seat; 10. Pin; 11. Connecting block; 12. Pull rod; 13. Guide rod; 14. Spring; 15. Sliding bar; 16. Flange; 17. Slide groove; 18. Slot; 19. First magnetic block. Detailed Implementation

[0032] The specific embodiments of this utility model are described in detail below. This utility model can be implemented in many ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used is for describing particular embodiments only and is not intended to limit the scope of this invention.

[0034] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 utility model 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 utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Example

[0037] like Figure 1-6 As shown, this utility model provides a catalytic recovery device for petrochemical tail gas, comprising:

[0038] The housing assembly includes a catalytic chamber 1 and a base 2. A sealed door 3 is provided at the front opening of the catalytic chamber 1. The base 2 is fixedly connected to the bottom of the catalytic chamber 1. An input pipe 4 is provided at the top of one side wall of the catalytic chamber 1, and an output pipe 5 is provided at the bottom of the opposite side wall.

[0039] A catalytic assembly includes at least one catalytic plate 6 disposed inside the catalytic chamber 1, an input pipe 4 located above the catalytic plate 6, an output pipe 5 located below the catalytic plate 6, the catalytic plate 6 including a catalytic region 61 for placing catalytic substances and a turbulence hole region 62 for the catalytically catalyzed exhaust gas to flow to the area below the catalytic plate 6, the turbulence hole region 62 being provided with several turbulence holes 621;

[0040] A lifting support assembly, located inside the catalytic converter 1, is used to fix and raise / lower the catalytic plate 6. It is understood that, as... Figure 1 As shown, the left side wall of the catalytic chamber 1 is provided with an input pipe 4, and the right side wall is provided with an output pipe 5. The input pipe 4 is used to transport the exhaust gas into the catalytic chamber 1. The exhaust gas in the catalytic chamber 1 comes into contact with the catalytic material in the catalytic zone 61 for catalysis, and then flows through the turbulence hole zone 62 to the bottom of the catalytic plate 6. Then, the above catalytic process is repeated with other catalytic plates 6 until the catalytic exhaust gas is transported to the next process through the output pipe 5. The type of catalytic material can be selected according to the different components contained in the exhaust gas to be catalyzed. The catalytic material is common knowledge known to those skilled in the art and will not be described in detail here.

[0041] This application achieves catalytic recovery of petrochemical tail gas through the above settings. Furthermore, by limiting the positions of the input pipe 4 and output pipe 5 and dividing the area of ​​the catalytic plate 6, the flow path of the tail gas can be controlled, ensuring that the tail gas to be catalyzed can fully contact the catalytic substance, effectively improving the catalytic effect. Secondly, by setting up a support lifting component, the height of the catalytic plate 6 can be adaptively adjusted according to the different components in the tail gas and the catalytic reaction characteristics of different catalytic substances. This not only further plans the flow path of the tail gas and achieves dynamic adaptation of the tail gas flow path, further ensuring the catalytic effect, but also effectively improves the applicability of the catalytic recovery equipment described in this application. It solves the problem that traditional fixed catalytic equipment cannot adapt to different operating conditions, ensuring high catalytic efficiency and catalytic effect when applied to catalyzing tail gas with different components.

[0042] Specifically, such as Figure 1-4 As shown, the supporting lifting assembly includes lifting columns 7 disposed opposite to the inner surfaces of the two side walls of the catalyst tank 1. A lifting frame 8 is slidably sleeved on the lifting columns 7. The lifting frame 8 is fixed to a preset position of the lifting columns 7 by a limiting component. The lifting frame 8 includes a left sliding plate 81 and a right sliding plate 82, and a base plate 83 connecting the left sliding plate 81 and the right sliding plate 82 respectively. The left sliding plate 81 and the right sliding plate 82 have the same structure. They are provided with opening slots 84 for accommodating the lifting columns 7 at the positions corresponding to the lifting columns 7. The lifting frame 8 is provided with a fixing part for installing the catalyst plate 6. Sealing gaskets are provided on the side of the left sliding plate 81, the right sliding plate 82 and the base plate 83 near the inner side of the catalyst tank 1. When the lifting frame 8 is installed in place, the sealing gaskets provided on the left sliding plate 81, the right sliding plate 82 and the base plate 83 abut against the inner side of the catalyst tank 1. It should be noted that the lifting column 7 is welded and fixed to the inner surface of the side wall of the catalytic converter 1, and the left sliding plate 81, right sliding plate 82 and bottom plate 83 are welded and fixed together. The sealing gasket is made of rubber. While realizing the up and down movement of the catalytic plate 6, the opening groove 84 can limit the lifting frame 8, restricting it to move up and down only along the length extension direction of the lifting column 7, effectively ensuring smooth adjustment and avoiding jamming during the lifting adjustment process. Furthermore, by setting the sealing gasket, it can prevent the exhaust gas from escaping along the gap between the lifting frame 8 and the inner side wall of the catalytic converter 1 during the exhaust gas catalysis process, further ensuring that the exhaust gas and the catalytic substance are in full contact, effectively improving the catalytic quality.

[0043] Specifically, such as Figure 4As shown, the limiting component includes a plurality of insertion holes 71 equidistantly opened on the lifting column 7, and limiting seats 9 respectively disposed on the left sliding plate 81 and the right sliding plate 82. The limiting seat 9 is provided with a limiting part adapted to the insertion hole 71. The limiting part is a pin 10 inserted into the limiting seat 9. By inserting the pin 10 into the insertion hole 71, the lifting frame 8 is fixed at a preset position on the lifting column 7. When it is necessary to adjust the height of the catalyst plate 6, the pin 10 is manually pulled out to release the limiting constraint on the lifting frame 8. Then, after adjusting to a suitable height, the pin 10 is manually inserted into the insertion hole 71 to fix the lifting frame 8 at that height.

[0044] In other embodiments of this utility model, such as Figure 5 As shown, the limiting part includes a connecting block 11 disposed within the limiting seat 9. A pull rod 12 extending through the outside of the limiting seat 9 is disposed on one side of the connecting block 11, along with two guide rods 13 located at both ends of the pull rod 12 and slidably engaged with the limiting seat 9. A spring 14 is sleeved on each guide rod 13, with one end of the spring 14 abutting against the inner side of the connecting seat and the other end abutting against the connecting block 11. A pin 10 engaging with the insertion hole 71 is disposed on the other side of the connecting block 11. This design continuously provides preload, preventing the pin 10 from loosening due to operational vibration, thus avoiding loosening and detachment of the lifting frame 8 during operation and effectively ensuring operational stability.

[0045] Specifically, such as Figure 3 , 4 As shown, the fixing part consists of slide bars 15 respectively disposed on opposite sides of the left slide plate 81 and the right slide plate 82. The free ends of the slide bars 15 extend upward and downward respectively to form flanges 16. A groove 17 is formed at the corresponding position of the catalyst plate 6 to slide and engage with the slide bars 15. A sealing gasket is provided on the side of the base plate 83 near the catalyst plate 6. When the catalyst plate 6 is installed in place, the catalyst plate 6 abuts against the sealing gasket on the side of the base plate 83 near the catalyst plate 6. It should be noted that the flanges 16 and the slide bars 15 are integral structures formed by processing. First, through the above... The design allows for the detachable installation of the catalytic plate 6. By pulling the catalytic plate 6 forward, it can be extracted from the lifting frame 8 using the cooperation of the sliding groove 17 and the sliding strip 15. This facilitates subsequent replacement or cleaning of the catalyst material, effectively improving work efficiency. Furthermore, after the catalytic plate 6 is extracted, its position can be adjusted by rotating it laterally. By changing the position of the catalytic plate 62, multiple options for the exhaust gas flow path can be achieved. Secondly, by further incorporating the flange 16 and sealing gasket, the detachable installation is achieved while also preventing exhaust gas from escaping into the chamber, further improving catalytic quality.

[0046] Specifically, such as Figure 6 As shown, the catalytic region 61 is located on one side of the catalytic plate 6, and the turbulence hole region 62 is located on the other side of the catalytic plate 6. Six catalytic plates 6 are arranged in a vertical array inside the catalytic chamber 1, with the turbulence hole regions 62 of adjacent catalytic plates 6 staggered horizontally. It should be noted that, for ease of illustration, only one catalytic plate 6 is shown in the accompanying drawings. The number of catalytic plates 6 can be adjusted according to the actual usage environment and performance requirements, and is not limited to the number shown in this embodiment. It can be understood that the input pipe 4 is located above the uppermost catalytic plate 6, and the output pipe 5 is located below the lowermost catalytic plate 6. Six lifting frames 8 are correspondingly arranged inside the catalytic chamber 1. The horizontal staggered arrangement refers to the fact that the turbulence hole regions 62 of adjacent catalytic plates 6 are not aligned vertically. For example, the turbulence hole region 62 of one catalytic plate 6 is located within the catalytic chamber 1. On the left side, the turbulence hole area 62 of the catalyst plate 6 below it is located on the right side inside the catalyst box 1; by setting multiple sets of catalyst plates 6 with adjustable height intervals, the vertical spacing and the position of the turbulence hole area 62 can be adjusted in two dimensions, and different exhaust gas flow paths can be designed according to different catalytic needs. In this embodiment, by setting the turbulence hole areas 62 of adjacent catalyst plates 6 to be staggered left and right, the exhaust gas forms an S-shaped flow path, which effectively prolongs the residence time of the exhaust gas in each layer of catalyst plate 6 area, ensuring that the exhaust gas can fully contact the catalytic material, ensuring that the exhaust gas achieves uniform catalytic treatment in the catalyst box 1, and further improving the catalytic effect.

[0047] Specifically, such as Figure 7As shown, the turbulence hole 621 includes a contraction section 6211 and an expansion section 6212. The cross-sectional area of ​​the contraction section 6211 gradually decreases along the exhaust gas flow direction, and the cross-sectional area of ​​the expansion section 6212 gradually increases along the exhaust gas flow direction. The large opening side of the contraction section 6211 is connected to the upper surface of the catalyst plate 6, and the large opening side of the expansion section 6212 is connected to the lower surface of the catalyst plate 6. The small opening side of the contraction section 6211 is connected to the small opening side of the expansion section 6212. The side of the expansion section 6212 near the catalyst region 61 is a vertically downward straight structure. With this configuration, when the exhaust gas enters the contraction section 6211 from the upper surface of the catalytic plate 6, its flow rate gradually increases, ensuring that the exhaust gas can quickly pass through the turbulence hole area 62. Then, the exhaust gas continues to flow into the expansion section 6212, where the exhaust gas flow is fully expanded, allowing it to diffuse evenly into the lower catalytic region 61. Furthermore, by setting the side near the catalytic region 61 as a vertically downward straight structure, the residence time of the exhaust gas in the catalytic region 61 of the lower catalytic plate 6 can be extended, preventing it from rapidly diffusing into the turbulence hole area 62 of the lower catalytic plate 6, further ensuring catalytic uniformity. It also forces the exhaust gas to flow close to the straight wall surface and guides it to generate a vertically downward jet during the expansion process. The shear force of the jet then breaks the reacted gas film on the surface of the catalytic material in the lower catalytic region 61, further ensuring catalytic efficiency and the activity of the catalytic material.

[0048] Specifically, such as Figure 1-2 As shown, after the catalytic plate 6 and the lifting frame 8 are installed in place, their front faces near the sealed door 3 are flush and both are equipped with sealing gaskets; the sealed door 3 has retaining strips on its rear left and right sides, and the free ends of the retaining strips extend to the left and right respectively with flanges. The catalytic box 1 has a retaining groove 18 corresponding to the position of the retaining strip, as shown. Figure 8As shown, the lower inner side of the sealed door 3 is rounded. Considering that certain types of catalysts may have their chemical properties affected by continuous light exposure, the sealed door 3 is opened and closed by a sliding mechanism, allowing for partial opening. In actual use, catalysts that require light protection and do not need replacement are placed on the upper catalyst plate 6, while catalysts that do not require light protection and need to be replaced during the catalytic process are placed on the lower catalyst plate 6. When replacing the catalyst, simply pull the sealed door 3 upwards to the catalyst plate 6 where the catalyst needs to be replaced. The location allows for the replacement of the catalyst while reducing the light intensity and exposure time of the catalyst in the upper catalyst plate 6, effectively ensuring the chemical properties of the catalyst and guaranteeing catalytic efficiency and effect. Furthermore, because it is necessary to ensure a certain degree of airtightness between each catalyst plate 6, after the airtight door 3 is closed, the sealing gaskets on the front end faces of the catalyst plate 6 and the lifting frame 8 abut against the inner side of the airtight door 3. By setting the lower inner side of the airtight door 3 as a rounded corner, it can play a guiding role and avoid the problem of the airtight door 3 being unable to close.

[0049] Specifically, to facilitate the fixing of the sealed door 3, a first magnetic block 19 is embedded at the top and bottom of the catalytic box 1, and a second magnetic block is embedded in the sealed door 3 at the position corresponding to the first magnetic block 19.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] For those skilled in the art, various modifications and improvements can be made without departing from the concept of this utility model, and these modifications and improvements are all within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims.

Claims

1. A catalytic recovery apparatus for petrochemical off-gases, characterized in that, include: The housing assembly includes a catalytic converter and a base. The catalytic converter has a sealed door at its front opening. The base is fixedly connected to the bottom of the catalytic converter. An input pipe is provided at the top of one side wall of the catalytic converter, and an output pipe is provided at the bottom of the opposite side wall. A catalytic assembly includes at least one catalytic plate disposed inside the catalytic chamber, an input pipe located above the catalytic plate, an output pipe located below the catalytic plate, the catalytic plate including a catalytic region for placing catalytic substances and a turbulence hole region for the catalytically catalyzed exhaust gas to flow to the area below the catalytic plate, the turbulence hole region being provided with several turbulence holes; A lifting support assembly is provided inside the catalytic converter box to fix and lift the catalytic plate.

2. The petroleum chemical tail gas catalytic recovery apparatus according to claim 1, characterized by, The supporting lifting assembly includes lifting columns disposed opposite to the inner surfaces of the two side walls of the catalyst tank, a lifting frame slidably sleeved on the lifting column, and the lifting frame being fixed at a preset position of the lifting column by a limiting assembly; The lifting frame includes a left sliding plate and a right sliding plate, and a base plate that connects the left sliding plate and the right sliding plate respectively. The left sliding plate and the right sliding plate have the same structure, and both have openings for accommodating the lifting column at the positions corresponding to the lifting column. The lifting frame is provided with a fixing part for installing the catalytic plate. The left sliding plate, the right sliding plate and the base plate are all provided with sealing gaskets on the side near the inner side of the catalytic chamber. When the lifting frame is installed in place, the sealing gaskets provided on the left sliding plate, the right sliding plate and the base plate abut against the inner side of the catalytic chamber.

3. The petroleum chemical tail gas catalytic recovery apparatus according to claim 2, characterized by, The limiting component includes a plurality of insertion holes equally spaced on the lifting column, and limiting seats respectively disposed on the left and right sliding plates, wherein the limiting seats are provided with limiting portions adapted to the insertion holes.

4. The petrochemical off-gas catalytic recovery apparatus according to claim 3, characterized by The limiting part is a pin inserted into the limiting seat. By inserting the pin into the socket, the lifting frame is fixed at the preset position of the lifting column.

5. The petroleum chemical tail gas catalytic recovery apparatus according to claim 3, characterized by The limiting part includes a connecting block disposed within the limiting seat. A pull rod extending through to the outside of the limiting seat is disposed on one side of the connecting block, and two guide rods located at both ends of the pull rod and slidingly engaged with the limiting seat. A spring is sleeved on the guide rod, with one end of the spring abutting against the inner side of the connecting seat and the other end abutting against the connecting block. A pin engaging with the insertion hole is disposed on the other side of the connecting block.

6. The petrochemical tail gas catalytic recovery equipment according to any one of claims 2-5, characterized in that, The fixing part is a slide bar respectively disposed on the opposite sides of the left slide plate and the right slide plate. The free ends of the slide bars extend upward and downward respectively to form flanges. The corresponding position of the catalyst plate is provided with a slide groove that slides and engages with the slide bar. A sealing gasket is provided on the side of the base plate near the catalytic plate. When the catalytic plate is installed in place, the catalytic plate abuts against the sealing gasket on the side of the base plate near the catalytic plate.

7. The petrochemical off-gas catalytic recovery apparatus according to claim 6, characterized by The catalytic region is located on one side of the catalytic plate, and the turbulence hole region is located on the other side of the catalytic plate. Six catalytic plates are arranged in a vertical array inside the catalytic box, and the turbulence hole regions of adjacent catalytic plates are staggered left and right.

8. The petrochemical off-gas catalytic recovery apparatus according to claim 7, characterized by The turbulence orifice includes a contraction section and an expansion section. The cross-sectional area of ​​the contraction section gradually decreases along the exhaust gas flow direction, and the cross-sectional area of ​​the expansion section gradually increases along the exhaust gas flow direction. The large opening side of the contraction section is connected to the upper surface of the catalytic plate, and the large opening side of the expansion section is connected to the lower surface of the catalytic plate. The small opening side of the contraction section is connected to the small opening side of the expansion section. The side of the expansion section near the catalytic region is a vertically downward straight structure.

9. The petrochemical off-gas catalytic recovery apparatus according to claim 8, characterized by After the catalyst plate and the lifting frame are installed in place, their front surfaces near the sealed door are flush and both are equipped with sealing gaskets. The sealed door is provided with locking strips on the left and right sides behind it. The free ends of the locking strips extend to the left and right respectively with flanges. The catalytic box has a locking groove that matches the position of the locking strip. The lower inner side of the sealed door is rounded.

10. The petrochemical off-gas catalytic recovery apparatus according to claim 9, characterized by The top and bottom of the catalytic chamber are each embedded with a first magnetic block, and the sealed door is embedded with a second magnetic block that magnetically attracts the first magnetic block.

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