Mechanism for detecting wear performance of SCR denitration catalyst

Abstract

This invention discloses a mechanism for detecting the wear performance of SCR denitrification catalysts, comprising a support plate with a pipe assembly on its upper surface. The pipe assembly includes two symmetrically arranged L-shaped vent pipes, with a connection port at one end of each vent pipe facing each other. A drive assembly is detachably mounted in the center of the upper surface of the support plate. The drive assembly includes a base plate with U-shaped plates at both ends of its upper surface. A motor is fixedly mounted in the center of one side of each U-shaped plate. The motor is connected via a motor shaft to a rotating shaft that can be rotatably mounted between the U-shaped plates. This mechanism for detecting the wear performance of SCR denitrification catalysts achieves automatic sealing and limiting of the honeycomb catalyst through gear meshing and threaded engagement, eliminating the need for manual installation and sealing, greatly reducing the labor intensity of workers. Furthermore, it avoids gas leakage caused by air gaps during connection, which could interfere with the test results, thus improving the accuracy of the detection.

Description

Technical Field

[0001] This invention belongs to the field of SCR denitrification catalyst wear performance testing technology, specifically relating to a mechanism for testing the wear performance of SCR denitrification catalysts. Background Technology

[0002] Currently, domestic requirements for air pollutant emissions are becoming increasingly stringent, and large-scale coal-fired power plants have largely implemented ultra-low emission policies for flue gas pollutants. Selective nitrification reduction (SCR) has become the mainstream denitrification technology in coal-fired power plants due to its high efficiency and mature process. The denitrification catalyst is the core technology of the denitrification process, and ensuring its quality is crucial. Catalysts are typically arranged in high-dust environments and are constantly subjected to scouring from fly ash in the flue gas during operation. If the catalyst's wear resistance is insufficient, it will affect the denitrification efficiency. For honeycomb catalysts, it may even lead to the collapse of the catalyst layer, affecting the safe operation of the denitrification system.

[0003] Currently, in the industrial production process of honeycomb catalysts, in order to ensure product quality, it is necessary to randomly sample honeycomb catalysts on the production line for testing. During the testing process, the actual working environment of the honeycomb catalyst is generally simulated, that is, a connecting pipeline is used to transport high-speed flue gas for flushing, so as to detect the wear performance of the honeycomb catalyst.

[0004] To ensure the stability and accuracy of the testing process, the gas velocity at both ends of the pipeline is unstable compared to the velocity at the middle position when the gas is transported in the pipeline, which can easily affect the accuracy of the test results. Therefore, the testing process generally selects to set a honeycomb catalyst in the middle section of the pipeline. However, this can also affect the pipeline's sealing performance. Because the honeycomb catalyst is set in the middle section of the pipeline, there is a gap between the two ends and the honeycomb catalyst, which can cause gas leakage and interfere with the testing process, affecting the accuracy of the honeycomb catalyst wear performance test. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanism for detecting the wear performance of SCR denitrification catalysts, so as to solve the problems mentioned in the background art.

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

[0007] A mechanism for detecting the wear performance of SCR denitrification catalyst includes a support plate with a pipe assembly on its upper end face;

[0008] The pipeline assembly includes two symmetrically arranged L-shaped ventilation pipes with a connection port at one end facing each other. A drive assembly is detachably mounted in the center of the upper surface of the support plate. The drive assembly includes a base plate with U-shaped plates at both ends of its upper surface. A motor is fixedly mounted in the center of one side of the U-shaped plate. The motor is connected to a rotating shaft that can be rotatably mounted in the center between the U-shaped plates via a motor shaft. A fixing ring is fixedly sleeved in the center of the outer edge of the rotating shaft. A connecting plate is constructed on the outer edge of the fixing ring. A test assembly is detachably connected to the end of the connecting plate away from the fixing ring, and a columnar block is constructed inside the connecting plate. The test assembly includes a receiving cylinder, and a honeycomb catalyst body is detachably disposed inside the receiving cylinder. A connecting shaft is fixedly mounted in the center at both ends of the columnar block, and a drive gear is fixedly mounted in the end of the connecting shaft away from the columnar block.

[0009] The outer edge of each of the opposite ends of the ventilation pipes is provided with an external thread, and a rotating toothed ring is threadedly installed on the outer edge of each of the opposite ends of the ventilation pipes to fit the external thread. The outer edge of the rotating toothed ring is provided with a tooth groove that can mesh with the drive gear. The end of the rotating toothed ring away from the ventilation pipe is rotatably connected to a mounting base. An annular seat is fixedly installed in the center of the end of the mounting base away from the rotating toothed ring. A rubber sealing ring is bonded and fixed to the side of the annular seat away from the mounting base. Both ends of the receiving cylinder are provided with sealing grooves that are adapted to the rubber sealing ring for insertion and sealing. A limiting stop ring is constructed on the inner edge of the annular seat, one end of which can abut against the honeycomb catalyst body.

[0010] Furthermore, an annular positioning groove is provided on the inner edge surface of the opposite end of the ventilation pipe, and an annular positioning plate is installed on the inner edge surface of the mounting base facing the ventilation pipe. The annular positioning plate can be adapted to be movably inserted and installed in the annular positioning groove.

[0011] Furthermore, the rotating toothed ring has an annular groove centered at one end facing the mounting base, and a connecting ring that can be rotatably inserted into the annular groove is mounted on the side of the mounting base away from the annular base. A bearing is provided at the connection between the connecting ring and the inner wall of the annular groove.

[0012] Furthermore, a positioning insert plate is installed on the outer edge surface of the receiving cylinder, and a slot for inserting the positioning insert plate is centrally located at the end of the connecting plate away from the fixing ring. The surface of the connecting plate is provided with a fixing screw that can be screwed into the positioning insert plate at one end.

[0013] Furthermore, a fixing plate is centrally mounted on both sides of the base plate, and fixing bolts are equidistantly arranged on the upper surface of the fixing plate. One end of each fixing bolt can be screwed into the bearing plate.

[0014] Furthermore, a guide plate is provided on one side of the upper end face of the bearing plate, and an arc-shaped guide plate is installed on the top of the guide plate. One end of the guide plate is attached to the end of the receiving cylinder and the bending angle is adapted to the receiving cylinder. A fixing block is provided at the bottom of the guide plate, and one side of the fixing block is welded to the bearing plate.

[0015] Furthermore, a fixed seat is fixedly installed on one side of the bearing plate where the guide plate is provided, and a pneumatic telescopic rod is fixedly installed in the center of the fixed seat on the side away from the guide plate. One end of the pneumatic telescopic rod extends out of the fixed seat and is fixedly connected to a pusher plate, which can be movably extended and retracted inside the bearing cylinder.

[0016] Compared with the prior art, the present invention has the following advantages: thanks to the arrangement of the bearing plate, motor, rotating shaft, fixed ring, connecting plate, columnar block, connecting shaft, drive gear, housing cylinder, ventilation pipe, connecting port, external threaded part and rotating toothed ring, when testing the wear performance of honeycomb catalyst, the honeycomb catalyst body is placed in the housing cylinder, and the housing cylinder is deflected by starting the motor, so that the outer edge of the drive gear meshes with the outer edge of the rotating toothed ring, thereby pushing the mounting seat towards the housing cylinder through the thread action, and then causing the ring seat to move towards the housing cylinder, and the rubber sealing ring is inserted into the sealing groove opened at the end of the housing cylinder, thereby realizing the sealed connection and installation of the housing cylinder, avoiding the situation that gas leakage and interference with the test results are caused by the presence of air gap during connection, and the connection process is more convenient, which is conducive to realizing automated connection and sealing;

[0017] Thanks to the configuration of the housing, honeycomb catalyst body, external thread, rotating gear ring, mounting base, annular seat, and limiting ring, during the meshing of the outer edge of the drive gear and the outer edge of the rotating gear ring, the mounting base and annular seat move synchronously toward the housing, thereby driving the limiting ring to extend into the housing. The housing then abuts and limits the two ends of the honeycomb catalyst body, thus preventing the honeycomb catalyst body from moving when high-speed airflow passes through, which helps to ensure the stability of the honeycomb catalyst body testing process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the pipeline assembly and the test assembly of the present invention in a separated state;

[0020] Figure 3 This is a cross-sectional view of the pipeline assembly and test assembly of the present invention in the connected state;

[0021] Figure 4 This is a schematic diagram of the structure of the driving component of the present invention;

[0022] Figure 5 For the present invention Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0023] In the diagram: 1. Bearing plate; 2. Guide plate; 3. Material guide plate; 4. Fixed seat; 5. Pneumatic telescopic rod; 6. Pushing plate; 7. Drive assembly; 701. Base plate; 702. U-shaped plate; 703. Fixed plate; 704. Fixing bolt; 705. Motor; 706. Rotating shaft; 707. Fixing ring; 708. Connecting plate; 709. Columnar block; 710. Connecting shaft; 711. Drive gear; 712. Loading cylinder; 713. Positioning insert plate; 714. Honeycomb catalyst body; 8. Ventilation pipe; 9. Connection port; 10. External threaded part; 11. Rotating gear ring; 12. Mounting seat; 13. Connecting ring; 14. Annular positioning groove; 15. Annular positioning plate; 16. Annular seat; 17. Rubber sealing ring; 18. Limiting stop ring. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] like Figures 1-5 As shown, the mechanism for detecting the wear performance of SCR denitrification catalyst includes a support plate 1 with a pipe assembly on its upper surface. The pipe assembly includes two symmetrically arranged L-shaped ventilation pipes 8, with a connection port 9 at one end of each ventilation pipe 8 facing each other. A drive assembly 7 is detachably mounted in the center of the upper surface of the support plate 1. The drive assembly 7 includes a base plate 701 with U-shaped plates 702 at both ends of its upper surface. A motor 705 is fixedly mounted in the center of one side of the U-shaped plate 702. The motor 705 is connected to a rotating shaft 7, which is rotatably mounted in the center between the U-shaped plates 702, via a motor shaft. 06. A fixing ring 707 is centrally fixedly sleeved on the outer edge surface of the rotating shaft 706. A connecting plate 708 is constructed on the outer edge surface of the fixing ring 707. A test component is detachably connected to one end of the connecting plate 708 away from the fixing ring 707. A columnar block 709 is constructed inside the connecting plate 708. The test component includes a receiving cylinder 712. A honeycomb catalyst body 714 is detachably disposed inside the receiving cylinder 712. A connecting shaft 710 is centrally fixedly installed at both ends of the columnar block 709. A drive gear 711 is fixedly installed at one end of the connecting shaft 710 away from the columnar block 709.

[0026] Each of the opposite ends of the ventilation pipe 8 has an external thread 10 on its outer edge, and a rotating gear ring 11 is threaded onto the opposite end of the ventilation pipe 8 to fit the external thread 10. The outer edge of the rotating gear ring 11 has a toothed groove that meshes with the drive gear 711. The deflection radius of the drive gear 711 intersects with the toothed groove on the outer edge of the rotating gear ring 11, and the deflection radius does not contact the bottom of the toothed groove, thus ensuring stable meshing between the rotating gear ring 11 and the drive gear 711. The rotating toothed ring 11 can be rotated and moved to push the seal. The end of the rotating toothed ring 11 away from the ventilation pipe 8 is rotatably connected to the mounting base 12. The end of the mounting base 12 away from the rotating toothed ring 11 is centrally fixedly mounted with an annular seat 16. The side of the annular seat 16 away from the mounting base 12 is bonded and fixedly attached with a rubber sealing ring 17. Both ends of the receiving cylinder 712 are centrally provided with sealing grooves for the rubber sealing ring 17 to be inserted and sealed. The inner edge surface of the annular seat 16 is constructed with a limiting stop ring 18 that can abut against the honeycomb catalyst body 714.

[0027] During the meshing process between the outer edge of the drive gear 711 and the outer edge of the rotating gear ring 11, the mounting seat 12 and the ring seat 16 move synchronously toward the housing cylinder 712, thereby driving the limiting ring 18 to extend into the housing cylinder 712, and the housing cylinder 712 abuts and limits the two ends of the honeycomb catalyst body 714.

[0028] like Figure 3 and Figure 5 As shown, an annular positioning groove 14 is provided on the inner edge surface of the opposite end of the ventilation pipe 8. An annular positioning plate 15 is installed on the inner edge surface of the mounting base 12 facing the ventilation pipe 8. The annular positioning plate 15 can be adapted to be movably inserted and installed in the annular positioning groove 14. An annular groove is provided in the center of the end of the rotating toothed ring 11 facing the mounting base 12. A connecting ring 13 that can be rotatably inserted and installed in the annular groove is provided on the side of the mounting base 12 away from the annular seat 16. A bearing is provided at the connection between the connecting ring 13 and the inner wall of the annular groove. By providing a bearing at the connection between the connecting ring 13 and the inner wall of the annular groove, the stability during the pushing process of the mounting base 12 can be improved.

[0029] like Figure 1 and Figure 4 As shown, a positioning insert plate 713 is installed on the outer edge of the mounting cylinder 712. A slot for the positioning insert plate 713 to be inserted is centrally located at the end of the connecting plate 708 away from the fixing ring 707. A fixing screw with one end can be screwed into the positioning insert plate 713 is provided on the surface of the connecting plate 708. Fixing plates 703 are centrally installed on both sides of the base plate 701. Fixing bolts 704 are equidistantly arranged on the upper surface of the fixing plate 703. One end of the fixing bolt 704 can be screwed into the bearing plate 1.

[0030] By inserting the positioning plate 713 into the slot and fixing it with fixing screws, the housing 712 can be disassembled and replaced, so that the housing 712 can be replaced according to the size of the honeycomb catalyst body 714.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, a guide plate 2 is provided on one side of the upper end face of the bearing plate 1. An arc-shaped guide plate 3 is installed at the top of the guide plate 2. One end of the guide plate 3 is attached to the end of the receiving cylinder 712 and the bending angle is adapted to the receiving cylinder 712. A fixing block is provided at the bottom of the guide plate 2. One side of the fixing block is welded to the bearing plate 1. A fixing seat 4 is fixedly installed on the side of the bearing plate 1 where the guide plate 2 is provided. A pneumatic telescopic rod 5 is fixedly installed in the center on the side of the fixing seat 4 away from the guide plate 2. One end of the pneumatic telescopic rod 5 extends out of the fixing seat 4 and is fixedly connected to a pusher plate 6. The pusher plate 6 can be movably extended and retracted inside the receiving cylinder 712.

[0032] Working principle: In use, this mechanism for detecting the wear performance of SCR denitrification catalysts involves placing the honeycomb catalyst body 714 inside the housing 712, then inserting the positioning plate 713 into the slot at the end of the connecting plate 708, and securing the positioning plate 713 with screws. Next, starting the motor 705 causes the rotating shaft 706 to rotate, thereby rotating the fixing ring 707. This, in turn, causes the connecting plate 708 to drive the drive gear 711 and the housing 712 to deflect, resulting in the housing 712 gradually deflecting. During the process, the outer edge of the drive gear 711 meshes with the outer edge of the external thread 10, and the meshing action drives the rotating gear ring 11 to rotate. The threaded engagement between the rotating gear ring 11 and the external thread 10 pushes the mounting seat 12 and the annular seat 16, thereby causing the rubber sealing ring 17 to be inserted into the sealing groove at the end of the housing cylinder 712, thus achieving a sealed connection and installation of the housing cylinder 712. Simultaneously, the annular seat 16 pushes the limiting stop ring 18 into the housing cylinder 712 during its movement, until... The end of the limiting ring 18 abuts against the end of the honeycomb catalyst body 714, placing the honeycomb catalyst body 714 in the middle position of the receiving cylinder 712 and limiting both ends. Then, high-pressure airflow is introduced into the ventilation pipe 8 to test the wear performance of the honeycomb catalyst body 714. After the test is completed, the reverse start 715 can be reversed to disengage the receiving cylinder 712 from the connection port 9 and deflect it by one unit of right angle. Then, by activating the pneumatic telescopic rod 5, the pusher plate 6 can be pushed into the receiving cylinder 712 by the rod of the pneumatic telescopic rod 5. In step 2, the honeycomb catalyst body 714 is pushed out of the receiving cylinder 712 by the pusher plate 6. The pushed honeycomb catalyst body 714 is guided to slide down by the guide plate 3 and the guide plate 2. This mechanism for detecting the wear performance of SCR denitrification catalyst achieves automatic sealing and limiting of the honeycomb catalyst through gear meshing and thread engagement. It eliminates the need for manual installation and sealing, greatly reducing the labor intensity of workers. In addition, it avoids gas leakage caused by the presence of air gaps during connection and prevents interference with the test results, which is conducive to improving the accuracy of the test.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A mechanism for detecting the wear performance of SCR denitrification catalyst, comprising a support plate (1) with a pipe assembly on its upper end face; Its features are: The pipe assembly includes two symmetrically arranged L-shaped ventilation pipes (8), with a connection port (9) at one end of each ventilation pipe (8) facing each other. A drive assembly (7) is detachably mounted in the center of the upper surface of the support plate (1). The drive assembly (7) includes a base plate (701) with U-shaped plates (702) at both ends of its upper surface. A motor (705) is fixedly mounted in the center of one side of the U-shaped plate (702). The motor (705) is connected to a rotating shaft (706) that can be rotatably mounted in the center between the U-shaped plates (702) via a motor shaft. A centrally fixed sleeve is mounted on the outer edge of the rotating shaft (706). A fixing ring (707) is provided, and a connecting plate (708) is constructed on the outer edge surface of the fixing ring (707). A test component is detachably connected to one end of the connecting plate (708) away from the fixing ring (707), and a columnar block (709) is constructed inside the connecting plate (708). The test component includes a receiving cylinder (712), and a honeycomb catalyst body (714) is detachably disposed inside the receiving cylinder (712). A connecting shaft (710) is fixedly installed at both ends of the columnar block (709), and a drive gear (711) is fixedly installed at one end of the connecting shaft (710) away from the columnar block (709). Each of the opposite ends of the ventilation pipe (8) is provided with an external thread (10), and a rotating toothed ring (11) is threadedly installed on the opposite end of the ventilation pipe (8) in conjunction with the external thread (10). The outer edge of the rotating toothed ring (11) is provided with a tooth groove that can mesh with the drive gear (711). The end of the rotating toothed ring (11) away from the ventilation pipe (8) is rotatably connected to a mounting seat (12). The end of the mounting seat (12) away from the rotating toothed ring (11) is centrally fixedly mounted with an annular seat (16). The side of the annular seat (16) away from the mounting seat (12) is bonded and fixedly attached with a rubber sealing ring (17). Both ends of the receiving cylinder (712) are centrally provided with sealing grooves that are adapted to the rubber sealing ring (17) for insertion and sealing. The inner edge of the annular seat (16) is constructed with a limiting stop ring (18) that can abut against the honeycomb catalyst body (714).

2. The mechanism for detecting the wear performance of SCR denitrification catalyst according to claim 1, characterized in that: An annular positioning groove (14) is provided on the inner edge of the opposite end of the ventilation pipe (8). An annular positioning plate (15) is installed on the inner edge of the mounting base (12) facing the ventilation pipe (8). The annular positioning plate (15) can be adapted to be movably inserted and installed in the annular positioning groove (14).

3. The mechanism for detecting the wear performance of an SCR denitrification catalyst according to claim 2, characterized in that: The rotating toothed ring (11) has an annular groove in the center of one end facing the mounting base (12). The mounting base (12) is equipped with a connecting ring (13) that can be rotatably inserted into the annular groove on the side away from the annular seat (16). A bearing is provided at the connection between the connecting ring (13) and the inner wall of the annular groove.

4. The mechanism for detecting the wear performance of SCR denitrification catalyst according to claim 1, characterized in that: A positioning insert plate (713) is installed on the outer edge of the mounting cylinder (712). The connecting plate (708) has a slot in the center at the end away from the fixing ring (707) for the positioning insert plate (713) to be inserted and installed. The surface of the connecting plate (708) is provided with a fixing screw that can be screwed into the positioning insert plate (713) at one end.

5. The mechanism for detecting the wear performance of an SCR denitrification catalyst according to claim 1, characterized in that: The base plate (701) has a fixing plate (703) installed in the center on both sides. The upper surface of the fixing plate (703) is provided with fixing bolts (704) at equal intervals. One end of the fixing bolt (704) can be screwed into the bearing plate (1).

6. A mechanism for detecting the wear performance of an SCR denitrification catalyst according to any one of claims 4 or 5, characterized in that: A guide plate (2) is provided on one side of the upper end face of the bearing plate (1). An arc-shaped guide plate (3) is installed on the top of the guide plate (2). One end of the guide plate (3) is attached to the end of the receiving cylinder (712) and the bending angle is adapted to the receiving cylinder (712). A fixing block is provided at the bottom of the guide plate (2). One side of the fixing block is welded to the bearing plate (1).

7. The mechanism for detecting the wear performance of an SCR denitrification catalyst according to claim 6, characterized in that: A fixed seat (4) is fixedly installed on one side of the bearing plate (1) where the guide plate (2) is located. A pneumatic telescopic rod (5) is fixedly installed in the center of the fixed seat (4) away from the guide plate (2). One end of the pneumatic telescopic rod (5) extends out of the fixed seat (4) and is fixedly connected to a pusher plate (6). The pusher plate (6) can be movably extended and retracted inside the container cylinder (712).

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