Device for hardening end of denitration catalyst

Abstract

The application discloses a denitration catalyst end hardening device and belongs to the technical field of denitration catalysts. The device comprises a hardening barrel for containing hardening liquid, wherein a through hole is arranged on the top cover of the hardening barrel; a placing box for containing the denitration catalyst is arranged and can move up and down along the through hole of the hardening barrel, and a water-permeable plate is arranged on the bottom of the placing box; a driving mechanism for driving the placing box to move is fixed on the top cover of the hardening barrel and comprises a linear execution assembly, wherein the output end of the linear execution assembly acts on the placing box and drives the placing box to move downwards into the hardening barrel or upwards to the outside of the hardening barrel. The denitration catalyst end hardening device is simple in structure and reliable in control mode.

Description

Technical Field

[0001] This invention relates to the field of denitrification catalyst technology, and in particular to a denitrification catalyst end hardening device. Background Technology

[0002] Denitrification catalysts are used in power plant denitrification systems. In the SCR reaction, they are substances that promote the selective chemical reaction between the reducing agent and nitrogen oxides in the flue gas at a certain temperature. Currently, denitrification catalysts are basically based on TiO2, with V2O5 as the main active component and WO3 and MoO3 as antioxidant and anti-poisoning auxiliary components. Catalyst types can be divided into three categories: plate type, honeycomb type, and corrugated plate type. To improve the performance of denitrification catalysts, both ends need to be hardened during the production process. A common method is to immerse one end of the denitrification catalyst in a special hardening solution. The end of the catalyst will absorb the hardening solution, thus achieving the purpose of end hardening.

[0003] Currently, the end hardening of some denitrification catalysts is done manually, which cannot guarantee efficiency and is not safe. To solve these problems, various manufacturers have begun to design denitrification catalyst end hardening devices that can achieve automatic control. For example, CN113181975B discloses a self-replenishing liquid balance type denitrification catalyst end hardening device and hardening process, including an impregnation tank, a freeze-drying mechanism, and an automatic gripping mechanism. The denitrification catalyst is simultaneously impregnated by multiple gripping components of the automatic gripping mechanism, and the rotation of the slots is controlled by a rotating wheel, so that the denitrification catalyst in multiple integrated slots is impregnated sequentially, increasing the denitrification catalyst throughput per unit time. However, when using the mechanical gripper, each catalyst strip needs to be aligned with the mechanical gripper. At the same time, catalyst may fall off when gripping the catalyst strip. Moreover, the existing solution tank is very low, and it may tip over when placing the catalyst to be hardened. In addition, the device has a complex structure, which greatly increases the cost of catalyst hardening. Summary of the Invention

[0004] Therefore, this invention proposes a denitrification catalyst end hardening device with simple structure and high working reliability.

[0005] To address the aforementioned technical problems, the present invention provides the following technical solution: A denitrification catalyst end hardening device includes: a hardening tank for containing hardening liquid, the top cover of the hardening tank having a perforation; a placement box for containing the denitrification catalyst, movable up and down along the perforation of the hardening tank, the bottom of the placement box having a permeable plate; and a driving mechanism for driving the placement box to move, fixed to the top cover of the hardening tank, including a linear actuator, the output end of the linear actuator acting on the placement box, driving the placement box to move downward along the perforation into the hardening tank or upward to the outside of the hardening tank. In some embodiments of the present invention, the placement box includes a box body with an opening on one side and a box cover that opens or closes the opening. The sides of the box body and the box cover that cooperate with each other are respectively provided with a magnetic attraction structure and a positioning structure.

[0006] In some embodiments of the present invention, the magnetic attraction structure includes dissimilar magnetic strips respectively disposed on opposite sides of the main body of the box and the box cover; the positioning structure includes positioning holes and positioning posts respectively disposed on opposite sides of the main body of the box and the box cover, the positioning posts being inserted into the positioning holes.

[0007] In some embodiments of the present invention, the driving mechanism includes a support frame for supporting the linear actuator, the lower end of the support frame being fixed to the top cover of the hardened barrel, the top plate of the support frame being used to mount the linear actuator, and the output end of the linear actuator being connected to the top wall of the placement box.

[0008] In some embodiments of the present invention, the driving mechanism further includes a guide assembly, the guide assembly including a guide post fixed to the top cover of the hardening barrel, a guide hole provided on the top wall of the placement box, the guide hole being fitted onto the guide post; a baffle plate is provided on the top of the guide post, the baffle plate limiting the maximum upward movement of the placement box.

[0009] In some embodiments of the present invention, a limiting mechanism is further included to restrict the movement of the placement box toward the inside of the hardening barrel. The limiting mechanism includes a fixed support fixed to the top cover of the hardening barrel and a plurality of baffles slidably connected to the fixed support. The baffles can slide into or out of the fixed support in a horizontal direction. When the baffles slide out of the fixed support, they cooperate with the top wall of the placement box to prevent the placement box from moving downward.

[0010] In some embodiments of the present invention, the limiting mechanism further includes a push rod for pushing the baffle to move. The push rod is slidably supported on the first side wall of the fixed support. The end of the push rod is fixed to the first end of the baffle, and the second end of the baffle slides into or out of the second side wall of the fixed support.

[0011] In some embodiments of the present invention, a slide rail extending in a horizontal direction is provided on the fixed support, and an opening communicating with the slide rail is provided on the second side wall of the fixed support. The vertical dimension of the slide rail is larger than the vertical dimension of the opening. The baffle includes a first support plate extending in a horizontal direction and a second support plate extending in a vertical direction. The first support plate cooperates with the opening, and the second support plate cooperates with the slide rail.

[0012] In some embodiments of the present invention, a first magnetic pole is provided on the side wall of the second support plate of the baffle away from the push rod, and a second magnetic pole is provided on the inner wall of the second side wall of the fixed support, wherein the first magnetic pole and the second magnetic pole have opposite magnetic properties.

[0013] In some embodiments of the present invention, a purification component located below the hardening barrel is also included. The purification component includes a purification box connected to the hardening barrel via a first pipe, and a switch valve is provided on the first pipe. A filter screen is provided inside the purification box, and the bottom wall of the purification box is connected to a second pipe.

[0014] The technical solution of the present invention has the following technical effects compared with the prior art: In the denitration catalyst end hardening device provided by the present invention, the placement box containing the denitration catalyst is moved linearly to the inside of the hardening barrel by controlling the drive mechanism. Since the bottom of the placement box is a water-permeable structure, the lower end of the denitration catalyst can be immersed in the hardening liquid in the hardening barrel along with the placement box, so as to achieve end hardening of the denitration catalyst. The structure is simple and the control method is simple and reliable.

[0015] Furthermore, in the denitrification catalyst end hardening device provided by the present invention, the sides of the box body and the box cover plate are respectively provided with magnetic attraction structure and positioning structure; the box cover plate and the box body can be detachably connected through the magnetic attraction structure and the positioning structure, which facilitates the placement of the catalyst, and the positioning structure makes the positioning reliability of the box cover plate high.

[0016] Furthermore, in the denitrification catalyst end hardening device provided by the present invention, the driving mechanism also includes a guide component. When the driving mechanism drives the placement box to move up and down, the guide holes on the placement box slide along the surface of the guide column to achieve stable movement of the placement box and avoid the problem of different hardening areas at the ends of different catalyst strips due to the placement box being tilted.

[0017] Furthermore, the denitrification catalyst end hardening device provided by the present invention also includes a limiting mechanism for restricting the movement of the placement box towards the inside of the hardening barrel. When the placement box moves downward, its top wall is blocked by a baffle to limit further downward movement. The descent height of the placement box can be limited by controlling the extension of baffles at different heights.

[0018] Furthermore, in the denitrification catalyst end hardening device provided by the present invention, by setting a purification mechanism, after the device completes the hardening treatment of the end of the denitrification catalyst, the hardening liquid has good filtration and purification characteristics, and the hardening liquid can be recycled to reduce pollution. Attached Figure Description

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein: Figure 1 This is a schematic diagram of a specific embodiment of the denitrification catalyst end hardening device of the present invention; Figure 2 This is another schematic diagram of a specific embodiment of the denitrification catalyst end hardening device of the present invention; Figure 3 This is a partial structural schematic diagram of a specific embodiment of the denitrification catalyst end hardening device of the present invention; Figure 4 This is a schematic diagram of a specific embodiment of the cover plate in the denitrification catalyst end hardening device of the present invention; Figure 5 This is a schematic diagram of a specific embodiment of the limiting mechanism in the denitrification catalyst end hardening device of the present invention; Figure 6 This is another schematic diagram of a specific embodiment of the limiting mechanism in the denitrification catalyst end hardening device of the present invention; Figure 7 This is a schematic diagram of a specific embodiment of the purification component in the denitrification catalyst end hardening device of the present invention. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1 , Figure 2 The figure shows a specific embodiment of the denitrification catalyst end hardening device (hereinafter referred to as catalyst hardening device) provided by the present invention, which achieves the hardening of the denitrification catalyst end by means of automatic control.

[0025] The catalyst hardening device includes a hardening tank 2 for containing the hardening liquid, a placement box 4 for containing the denitrification catalyst, and a drive mechanism 5 for moving the placement box 4. The hardening tank 2 is supported on a platform 1, which is supported on the ground by four support legs 7. The top cover 22 of the hardening tank 2 has perforations, allowing the placement box 4 to move up and down along these perforations. The bottom plate 412 of the placement box 4 has a grid, permeable holes, or other permeable structures. The lower end of the catalyst placed in the placement box 4 can be immersed in the hardening liquid in the hardening tank 2, achieving end hardening of the denitrification catalyst. The drive mechanism 5 is fixed to the top cover 22 of the hardening tank 2 and includes a linear actuator 52 for outputting linear motion. The output end of the linear actuator 52 acts on the placement box 4, driving the placement box 4 to move downwards along the perforations into the hardening tank 2 or upwards to the outside of the hardening tank 2.

[0026] In the above-mentioned catalyst hardening device, the placement box 4 containing the denitrification catalyst can be moved linearly to the inside of the hardening barrel 2 by controlling the drive mechanism 5. Since the bottom of the placement box 4 is a water-permeable structure, the lower end of the denitrification catalyst can be immersed in the hardening liquid in the hardening barrel 2 along with the placement box 4, so as to achieve end hardening of the denitrification catalyst. The structure is simple and the control method is simple and reliable.

[0027] Specifically, in one optional embodiment, the hardening tank 2 is composed of a tank body 21 with an opening on the upper side and a top cover 22 detachably connected together, and the detachable connection is achieved by bolting. The hardening liquid is injected into the hardening tank 2 by opening the top cover 22.

[0028] Specifically, in one alternative implementation, such as Figure 3 , Figure 4 As shown, the placement box 4 includes a main body 41 with an opening on one side and a cover plate 42 that opens or closes the opening. The sides of the main body 41 and the cover plate 42 that mate are respectively provided with a magnetic attraction structure and a positioning structure; the magnetic attraction structure and the positioning structure enable a detachable connection between the cover plate 42 and the main body 41. More specifically, the placement box 4 has an overall polygonal box structure, for example, a box with a rectangular cross-section. The main body 41 has an opening on its vertical side wall, and the side wall of the main body 41 with the opening is a rectangular frame. The cover plate 42 is connected to the rectangular frame of the main body 41.

[0029] Specifically, such as Figure 3 , Figure 4 As shown, a magnetic strip 411 made of magnetic material (e.g., a permanent magnet) is provided on the surface of the rectangular frame of the main body 41 of the box, and magnetic strips 421 with opposite polarities are provided in the corresponding areas of the box cover 42 to achieve mutual attraction between the two. Of course, for those skilled in the art, the magnetic structure on one side of the main body 41 and the box cover 42 can also be made of magnetic material (e.g., metals such as nickel and iron).

[0030] To improve the connection and positioning stability between the main body 41 and the cover plate 42, the positioning structure includes positioning holes and positioning posts 422 respectively provided on the opposite sides of the main body 41 and the cover plate 42. When the cover plate 42 is connected to the main body 41, the positioning posts 422 are inserted into the positioning holes to facilitate the operation and positioning of the cover plate 42.

[0031] Specifically, the structure of the linear actuator 52 is not unique. In one optional embodiment, the linear actuator 52 is a hydraulic cylinder; in other alternative embodiments, the linear actuator 52 can also be a pneumatic cylinder or a linear motor, etc. Figure 3 As shown, the drive mechanism 5 includes a support frame 51 for supporting the linear actuator 52. The lower end of the support frame 51 is fixed to the top cover 22 of the hardening barrel 2. The top plate of the support frame 51 is located on the upper side of the top wall 43 of the placement box 4. It is used to install the hydraulic cylinder, and the piston rod of the hydraulic cylinder is connected to the top wall 43 of the placement box 4.

[0032] To improve the stability of the placement box 4 during vertical movement, the drive mechanism 5 also includes a guide component, specifically, such as... Figure 3As shown, the guiding assembly includes four guide posts 54 fixed to the top cover 22 of the hardening barrel 2. The top wall 43 of the placement box 4 has a connecting edge that extends beyond the box body. Guide holes are provided at the four corners of the connecting edge of the top wall 43 of the placement box 4. The guide holes are fitted onto the guide posts 54. When the driving mechanism 5 drives the placement box 4 to move up and down, the four guide holes on the placement box 4 slide along the surfaces of the four guide posts 54 to achieve stable movement of the placement box 4 and avoid the placement box 4 from tilting, which would cause different hardening areas at the ends of different catalyst strips.

[0033] More specifically, such as Figure 1 As shown, the top of the guide post 54 is provided with a baffle 55, which is located on the upper side of the top wall 43 of the placement box 4. When the placement box 4 moves upward, the baffle 55 restricts the maximum upward movement of the placement box 4.

[0034] To control the hardening length of the catalyst strip, such as Figure 1 , Figure 6 and Figure 7 As shown, the catalyst hardening device also includes a limiting mechanism 6 for restricting the movement of the placement box 4 towards the inside of the hardening barrel 2. Specifically, the limiting mechanism 6 includes a fixed support 61 fixed to the top cover 22 of the hardening barrel 2, and several baffles 62 slidably connected to the fixed support 61. The baffles 62 can slide into or out of the fixed support 61 in a horizontal direction. When the baffles 62 slide out of the fixed support 61, the top wall 43 of the placement box 4 is blocked by the baffles 62, thereby restricting the placement box 4 from continuing to move downward. By controlling the extension of the baffles 62 at different heights, the descent height of the placement box can be limited.

[0035] Specifically, the fixed support 61 includes a first sidewall and a second sidewall that are arranged opposite each other and extend vertically. A slide rail 63 extending horizontally is provided between the first sidewall and the second sidewall of the fixed support 61. An opening 68 communicating with the slide rail 63 is provided on the second sidewall of the fixed support 61. The depth of the slide rail 63 in the vertical direction is greater than the vertical dimension of the opening 68. The baffle 62 includes a first support plate 621 extending horizontally and a second support plate 622 extending vertically. The upper and lower surfaces of the first support plate 621 are slidably engaged with the upper and lower sidewalls of the opening 68, and the upper and lower surfaces of the second support plate 622 are slidably engaged with the upper and lower sidewalls of the slide rail 63.

[0036] To ensure the position of the baffle 62 sliding out of the fixed support 61 is determined, a first magnetic pole 64 is provided on the side wall of the second support plate 622 near the first support plate 621, and a second magnetic pole 67 is provided on the inner wall of the second side wall of the fixed support 61 (i.e., the inner walls located on the upper and lower sides of the opening 68). The first magnetic pole 64 and the second magnetic pole 67 have opposite magnetic properties. When the second support plate 622 of the baffle 62 moves to the side close to the opening 68, the first magnetic pole 64 and the second magnetic pole 67 attract each other, fixing the baffle 62 to the fixed support 61, thus improving the limiting stability of the limiting mechanism 6.

[0037] Specifically, in order to facilitate the movement of the baffle 62, in an optional embodiment, the limiting mechanism 6 further includes a push rod 65 for pushing the baffle 62 to move. The push rod 65 is slidably supported on the first side wall of the fixed support 61. One end of the push rod 65 is fixed to the second support plate 622 of the baffle 62. The other end of the push rod 65 is provided with a push plate 66 with a cross-section larger than other areas of the push rod 65, so as to facilitate the operator to push the push rod 65.

[0038] Specifically, in order to reliably support the placement box 4, multiple sets of limiting mechanisms 6 are provided. For example, a set of limiting mechanisms 6 is provided on each of the opposite sides of the placement box 4, and the placement box 4 is supported by two baffles 62.

[0039] Specifically, such as Figure 1 , Figure 2 and Figure 7 As shown, the catalyst hardening device also includes a purification component 8 located below the hardening tank 2. The purification component 8 includes a purification box 81, which is fixed to the lower side wall of the hardening tank 2 by a connecting rod 82. The purification box 81 is connected to the hardening tank 2 via a first pipe 84. A switch valve 85 is provided on the first pipe 84, which is used to control the purification operation of the hardening liquid to open or close. A filter screen 87 is provided inside the purification box 81, so that the liquid discharged from the hardening tank 2 after the end of the denitrification catalyst has been hardened can be filtered and purified inside the purification box 81 by the filter screen 87. The bottom wall of the purification box 81 is connected to a second pipe 83, and the purified liquid is discharged from the second pipe 83. After the purification box 81 has been used for a long time, the door panel 86 can be opened to clean the filter screen 87 inside the purification box 81.

[0040] The working process of hardening the end of the denitrification catalyst using the above-mentioned catalyst hardening device is as follows: the denitrification catalyst is placed inside the placement box 4, the box cover 42 is closed, the linear actuator 52 (i.e., the hydraulic rod) is started, and the output end of the hydraulic rod drives the placement box 4 to move, so that the placement box 4 enters the hardening tank 2. The hardening liquid in the hardening tank 2 enters the placement box 4 through the bottom grid of the placement box 4 to harden the end of the denitrification catalyst inside the placement box 4.

[0041] According to the pre-set end hardening area of ​​the denitrification catalyst, the limiting mechanism 6 is adjusted as follows: push the push rod 65 to move the baffle 62 out of the fixed support 61, the second support plate 622 of the baffle 62 moves inside the fixed support 61, the second support plate 622 uses the first magnetic pole 64 to magnetically attract the second magnetic pole 67 inside the fixed support 61 to realize the fixed connection between the baffle 62 and the fixed support 61, and the part of the baffle 62 located outside the fixed support 61 limits the top plate of the placement box 4 to realize the adjustment of the end hardening area of ​​the denitrification catalyst.

[0042] After hardening is completed, the process of purifying and adjusting the hardening liquid in the hardening tank 2 is as follows: Open the switch valve 85 on the first pipe 84, and the liquid that has completed the hardening of the end of the denitrification catalyst enters the interior of the purification tank 81 through the first pipe 84. The liquid comes into contact with the filter screen 87 inside the purification tank 81. The filter screen 87 filters and purifies the liquid and discharges it to the outside through the second pipe 83.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for end-hardening a denitrification catalyst, characterized in that, include: A hardening tank for containing hardening liquid, wherein the top cover of the hardening tank is provided with perforations; The placement box for containing the denitrification catalyst can move up and down along the perforations of the hardened barrel, and the bottom of the placement box is provided with a water-permeable plate. A drive mechanism for moving the placement box is fixed to the top cover of the hardening barrel, and includes a linear actuator. The output end of the linear actuator acts on the placement box, driving the placement box to move downward along the perforation into the hardening barrel or upward to the outside of the hardening barrel. It also includes a limiting mechanism for restricting the placement box from moving inward toward the hardening barrel. The limiting mechanism includes a fixed support fixed to the top cover of the hardening barrel and a plurality of baffles slidably connected to the fixed support. The baffles can slide into or out of the fixed support in the horizontal direction. The limiting mechanism also includes a push rod for pushing the baffle to move. The push rod is slidably supported on the first side wall of the fixed support. The end of the push rod is fixed to the first end of the baffle. The second end of the baffle slides into or out of the second side wall of the fixed support. The fixed support is provided with a slide rail extending in the horizontal direction, and the second side wall of the fixed support is provided with an opening communicating with the slide rail. The vertical dimension of the slide rail is larger than the vertical dimension of the opening. The baffle includes a first support plate extending in the horizontal direction and a second support plate extending in the vertical direction. The first support plate cooperates with the opening, and the second support plate cooperates with the slide rail. A first magnetic pole is provided on the side wall of the second support plate of the baffle away from the push rod, and a second magnetic pole is provided on the inner wall of the second side wall of the fixed support. The first magnetic pole and the second magnetic pole have opposite magnetic properties. When the baffle slides out of the fixed support, it is used to cooperate with the top wall of the placement box to prevent the placement box from moving downward.

2. The denitrification catalyst end hardening device according to claim 1, characterized in that, The placement box includes a main body with an opening on one side and a box cover that opens or closes the opening. The sides of the main body and the box cover that cooperate with each other are respectively provided with a magnetic attraction structure and a positioning structure.

3. The denitrification catalyst end hardening device according to claim 2, characterized in that, The magnetic attraction structure includes dissimilar magnetic strips respectively disposed on opposite sides of the main body of the box and the box cover; the positioning structure includes positioning holes and positioning posts respectively disposed on opposite sides of the main body of the box and the box cover, with the positioning posts inserted into the positioning holes.

4. The denitrification catalyst end hardening device according to claim 1, characterized in that, The drive mechanism includes a support frame for supporting the linear actuator, the lower end of the support frame being fixed to the top cover of the hardened barrel, the top plate of the support frame being used to mount the linear actuator, and the output end of the linear actuator being connected to the top wall of the placement box.

5. The denitrification catalyst end hardening device according to claim 4, characterized in that, The driving mechanism further includes a guide assembly, which includes a guide post fixed to the top cover of the hardening barrel, a guide hole provided on the top wall of the placement box, and the guide hole fitted onto the guide post; a baffle is provided on the top of the guide post, and the baffle restricts the maximum upward movement of the placement box.

6. The denitrification catalyst end hardening device according to claim 1, characterized in that, It also includes a purification assembly located below the hardening barrel. The purification assembly includes a purification box that is connected to the hardening barrel through a first pipe. The first pipe is equipped with a switch valve. The purification box is equipped with a filter screen. The bottom wall of the purification box is connected to a second pipe.

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