Novel catalytic plate fixing support for regeneration test of passive hydrogen recombiner

Abstract

The invention relates to a novel catalytic plate fixing bracket for a regeneration test of a passive hydrogen recombiner, which is applied to the regeneration test of the passive hydrogen recombiner in a nuclear power plant. Two heat insulation handles are arranged above the short edges of the two sides of the square frame A; three supporting rods A in one group are uniformly distributed on the inner side of the square frame A; two supporting frames in one group are arranged below the three supporting rods A; the upper ends of the 41 isolation frames penetrate through and are fixed in the vertical short side openings in the two sides of the two supporting frames in the upper group; the lower ends of the 41 isolation frames penetrate through and are fixed in the vertical short side openings in the two sides of the two supporting frames in the lower group; the two supporting frames in the lower group are fixed on the upper sides of the three supporting rods A in the lower group; the three supporting rods A in the lower group are fixed on the upper side of the square frame B; four supporting rods B in two groups are arranged on the inner sides of the short edges of the square frame A and the square frame B; the high-temperature catalytic sheet in the test process can be fixed and transferred.

Description

Technical Field

[0001] The invention relates to a novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket, which is applied to the passive hydrogen recombiner regeneration test of nuclear power plants and can fix and transfer high-temperature catalytic plates during the test. Background Art

[0002] The passive hydrogen recombiner is in standby mode when the nuclear power plant is operating normally. The catalytic plates installed in the passive hydrogen recombiner are placed in the containment for a long time, which may absorb various substances in the air, such as dust, paint volatiles, halogen substances and water vapor, resulting in a decrease in the catalytic activity of the catalytic plates, and then the hydrogen removal capacity of the passive hydrogen recombiner is reduced. Therefore, in order to ensure the functionality and reliability of the passive hydrogen recombiner, it is necessary to conduct in-service inspections during overhauls and carry out performance tests and regeneration tests of the passive hydrogen recombiner catalytic plates.

[0003] When testing the performance of the catalytic plates of the passive hydrogen recombiner, three catalytic metal plates are placed in a small room at 50°C, and a test gas containing hydrogen (3% H2 + 97% air) is passed through the catalytic metal plates. If the hydrogen concentration drops below 75% of the initial concentration within 15 minutes, the test result is qualified. If the performance test of the catalytic plates in the same hydrogen recombiner fails twice in a row, a regeneration test is required for the entire catalytic plate (80 or 160 plates). The catalytic plates are placed in a heating cabinet, the temperature is adjusted to 200±3°C, and the regeneration gas (5% H2 + 95% N2) is introduced for reduction regeneration. The catalytic plates are taken out after 15 or 20 minutes.

[0004] The original passive hydrogen recombiner regeneration test catalytic plate fixing bracket had no anti-scalding design. During the regeneration test, the test personnel directly contacted the high-temperature bracket and catalytic plate, which could easily cause burns; the regeneration bracket could not be applied to plates of different sizes. Summary of the invention

[0005] The purpose of the present invention is to provide a novel catalytic plate fixing bracket for a passive hydrogen recombiner regeneration test, which can facilitate the transfer of the bracket and the catalytic plate during the passive hydrogen recombiner regeneration test; the bracket can adapt to the mainstream catalytic plate sizes at home and abroad, and the catalytic plate can be fully placed in the regeneration gas atmosphere, so that the catalytic plate can be easily taken and placed, and the wear of the catalyst coating caused by friction with the bracket during the taking and placing process can be prevented; the gripper can quickly and stably transfer the bracket, prevent the catalytic plate from slipping during the movement of the bracket, and prevent burns to personnel caused by the high temperature of the bracket.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A novel non-active hydrogen recombiner regeneration test catalytic plate fixing bracket, two heat-insulating handles are arranged above the short sides of both sides of a square frame A; a group of three support rods A are evenly distributed on the inside of the square frame A; a group of two support frames are arranged below the three support rods A; the upper ends of 41 isolation frames pass through and are fixed in the vertical short side openings on both sides of the group of two support frames located above; the lower ends of 41 isolation frames pass through and are fixed in the vertical short side openings on both sides of the group of two support frames located below; the group of two support frames below is fixed to the upper side of the group of three support rods A below; the group of three support rods A below is fixed to the upper side of the square frame B; two groups of four support rods B are arranged inside the short sides of the square frames A and B.

[0008] It also includes a special gripper for matching use, which includes a tool frame and a tool hook. Two groups of four tool hooks are respectively arranged on the short sides of both sides of the tool frame.

[0009] Place the catalytic plate to be regenerated vertically in the gap of the isolation frame, hold the special gripper, hook the four tool hooks on the insulation handle, place the bracket and the catalytic plate in the oven of the regeneration device, detach the four tool hooks from the insulation handle, take the special gripper out of the oven, close the oven door, adjust the oven temperature to the test temperature of 200°C, introduce regeneration gas, and conduct a catalytic plate regeneration test; after the regeneration test is completed, open the oven, hold the special gripper, hook the four tool hooks on the insulation handle, and move the bracket and the catalytic plate out of the oven; after the temperature of the catalytic plate drops to room temperature, move the regenerated catalytic plate out of the bracket, and repeat the above steps until the regeneration test of all catalytic plates is completed.

[0010] The heat-insulating handle is a 130mm×50mm C-shaped structure with two rounded top corners. Two supports are set in the middle of the C-shaped structure. The heat-insulating handle is made of 6mm diameter stainless steel round steel.

[0011] Square frame A is a 236mm×350mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel; square frame B is a 244mm×359mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel.

[0012] The upper ends of the 41 isolation frames are of a concave-shaped structure, and the lower ends are of a C-shaped structure. The longest sides of the upper and lower ends are welded and made of 3mm diameter stainless steel round steel. The distance between each of the 41 isolation frames is 3mm.

[0013] Support rod A is a stainless steel round rod with a length of 224 mm and a diameter of 6 mm; support rod B is a stainless steel round rod with a length of 181 mm and a diameter of 6 mm.

[0014] The support frame is a U-shaped frame with a total length of 324mm, a horizontal long side width of 18mm, a vertical short side width of 10mm on both sides, and 41 pairs of 3mm diameter circular holes evenly distributed at intervals of 6.5mm on both sides of the short sides; 2 groups of U-shaped openings of the support frames are arranged outwards, with the U-shaped right-angled long sides parallel and the plane distance of 160mm.

[0015] The tool frame is a 344mm×120mm rectangular frame with four rounded corners, and is made of 10mm diameter stainless steel round steel; extraction handles are set on the inner side of the long sides of both sides of the tool frame, and are made of 6mm diameter stainless steel round steel.

[0016] The tool hook is a 50mm×30mm L-shaped structure with rounded top corners, and is made of 3mm diameter stainless steel round steel; the 4 tool hooks are divided into 2 groups and are set on the short sides of both sides of the tool frame, and the spacing between each group of tool hooks is 93mm.

[0017] The beneficial effects achieved by the present invention are:

[0018] The size of the regeneration bracket is suitable for non-active hydrogen recombiner catalytic plates of different sizes produced by domestic and foreign manufacturers; there is a special hook on the regeneration bracket, and the regeneration bracket can be sent into or moved out of the oven through a special gripper to avoid direct contact between personnel and the 200-degree high-temperature regeneration bracket and oven, effectively preventing personnel from being scalded; after the bracket is installed with the catalytic plate, a special gripper can be used to prevent the bracket from tilting during movement and the catalytic plate from sliding off the bracket; the spacing between the catalytic plates is reasonable, and the catalytic plates can be fully regenerated during the regeneration test, and the spacing between the support frames is reasonable to prevent the catalyst coating from falling off due to friction between the catalytic plate and the bracket during loading and unloading; the structure is strong, and the bracket and gripper materials can withstand the high temperature of the regeneration test.

[0019] The common sizes of catalytic plates of domestic manufacturers are 300*150*0.3mm and 300*150*0.6mm, and the common sizes of catalytic plates of foreign manufacturers are 290*140*0.3mm. The present invention is used for periodic testing and regeneration devices based on universal passive hydrogen recombiners, and is suitable for passive hydrogen recombiner catalytic plates of different sizes produced by domestic and foreign manufacturers. This bracket can install 40 catalytic plates at the same time. The spacing of the isolation frames in the bracket is reasonable, which can keep the appropriate distance between the catalytic plates. The round steel has a small diameter and a small contact surface with the catalytic plate, so that the catalytic plate is fully exposed to the regeneration gas atmosphere to ensure the regeneration effect; the catalytic plate in the bracket is easy to install and remove, and it is not easy to cause damage to the catalyst coating during the installation and removal of the catalytic plate from the bracket. The special gripper tool can easily take the regeneration bracket, effectively keep the bracket balanced during the movement process, and prevent the catalytic plate from falling; the nuclear power plant staff does not directly contact the high-temperature bracket, which effectively reduces the risk of scalding during the test operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A schematic diagram of a novel catalyst plate fixing bracket for a passive hydrogen recombiner regeneration test;

[0021] Figure 2 It is a side view of a catalyst plate fixing bracket for a new type of passive hydrogen recombiner regeneration test;

[0022] Figure 3 This is the front view of the gripper;

[0023] Figure 4 This is the top view of the gripper;

[0024] In the figure: heat-insulating handle 1.1, square frame A1.2, isolation frame 1.3, square frame B1.4, support rod A1.5, support rod B1.6, support frame 1.7, tool frame 2.1, tool hook 2.2. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] The present invention is used for a universal passive hydrogen recombiner periodic test and regeneration device, comprising a catalyst plate regeneration bracket and an auxiliary bracket gripper. The regeneration bracket comprises a heat insulation handle 1.1, a square frame A1.2, an isolation frame 1.3, a square frame B1.4, a support rod A1.5, a support rod B1.6, and a support frame 1.7, and the bracket extraction gripper comprises a tool frame 2.1 and a tool hook 2.2.

[0027] Two heat-insulating handles 1.1 are arranged above the short sides of both sides of the square frame A1.2; a group of three supporting rods A1.5 are evenly distributed on the inner side of the square frame A1.2; a group of two supporting frames 1.7 are arranged below the three supporting rods A1.5; the upper ends of 41 isolation frames 1.3 pass through and are fixed in the vertical short side openings on both sides of the group of two supporting frames 1.7 located above; the lower ends of 41 isolation frames 1.3 pass through and are fixed in the vertical short side openings on both sides of the group of two supporting frames 1.7 located below; the group of two supporting frames 1.7 located below is fixed to the upper side of the group of three supporting rods A1.5 located below; the group of three supporting rods A1.5 located below is fixed to the upper side of the square frame B1.4; two groups of four supporting rods B1.6 are arranged on the inner sides of the short sides of the square frames A1.2 and B1.4; two groups of four tool hooks 2.2 are arranged on the short sides of both sides of the tool frame 2.1 respectively.

[0028] The heat-insulating handle 1.1 is a 130mm×50mm “C”-shaped structure with two rounded corners. Two supports are set in the middle of the “C”-shaped structure. The heat-insulating handle 1.1 is made of 6mm diameter stainless steel round steel. The square frame A1.2 is a 236mm×350mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel. The 41 isolation frames 1.3 have a “concave”-shaped structure at the upper end and a “C”-shaped structure at the lower end. The longest sides of the upper and lower ends are welded and connected, and are made of 3mm diameter stainless steel round steel. The distance between the 41 isolation frames 1.3 is 3mm. The square frame B1.4 is a 244mm×359mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel. The support rod A1.5 is a 224mm long and 6mm diameter stainless steel round bar. The support rod B1.6 is a 181mm long and 6mm diameter stainless steel round bar. The support frame 1.7 is a "U"-shaped frame with a total length of 324mm, a horizontal long side width of 18mm, a vertical short side width of 10mm on both sides, and 41 pairs of 3mm diameter round holes evenly distributed at intervals of 6.5mm on the short sides of both sides. The two groups of U-shaped openings of the support frame 1.7 are arranged outwards, and the long sides of the U-shaped right angles are parallel and the plane distance is 160mm. The tool frame 2.1 is a 344mm×120mm rectangular frame with rounded corners on the four vertices, made of 10mm diameter stainless steel round steel. Extraction handles are set on the inner sides of the long sides of the tool frame 2.1, made of 6mm diameter stainless steel round steel. The tool hook 2.2 is a 50mm×30mm "L"-shaped structure with rounded corners, made of 3mm diameter stainless steel round steel. The four tool hooks 2.2 are divided into two groups and are set on the short sides of the tool frame 2.1. The spacing between each group of tool hooks 2.2 is 93mm.

[0029] The heat-insulating handle 1.1, the square frame A1.2, the isolation frame 1.3, the square frame B1.4, the support rod A1.5, the support rod B1.6, and the support frame 1.7 are all connected by welding. The tool hook 2.2 and the tool frame 2.1 are all connected by welding.

[0030] Place the catalytic plate to be regenerated vertically in the gap of the isolation frame 1.3, hold the special gripper, hook its four tool hooks 2.2 on the insulation handle 1.1, place the bracket and the catalytic plate in the oven of the regeneration device, detach the four tool hooks 2.2 from the insulation handle 1.1, take the special gripper out of the oven, close the oven door, adjust the oven temperature to the test temperature of 200°C, pass the regeneration gas, and conduct the catalytic plate regeneration test. After the regeneration test is completed, open the oven, hold the special gripper, hook its four tool hooks 2.2 on the insulation handle 1.1, and move the bracket and the catalytic plate out of the oven. After the plate temperature drops to room temperature, move the regenerated catalytic plate out of the bracket, and repeat the above steps until all catalytic plate regeneration tests are completed.

Claims

1. A novel catalyst plate fixing bracket for passive hydrogen recombiner regeneration test, characterized in that: Two heat-insulating handles are set above the short sides of both sides of the square frame A; a group of 3 support rods A are evenly distributed on the inner side of the square frame A; a group of 2 support frames are set below the 3 support rods A; the upper ends of 41 isolation frames pass through and are fixed in the vertical short side openings on both sides of the group of 2 support frames located above; the lower ends of 41 isolation frames pass through and are fixed in the vertical short side openings on both sides of the group of 2 support frames located below; the lower group of 2 support frames is fixed to the upper side of the group of 3 support rods A below; the lower group of 3 support rods A is fixed to the upper side of the square frame B; 2 groups of 4 support rods B are set on the inner sides of the short sides of the square frames A and B.

2. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized in that: It also includes a special gripper for matching use, which includes a tool frame and a tool hook. Two groups of four tool hooks are respectively arranged on the short sides of both sides of the tool frame.

3. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 2 is characterized in that: Place the catalytic plate to be regenerated vertically in the gap of the isolation rack, hold the special gripper, hook the four tool hooks on the heat-insulating handle, place the bracket and the catalytic plate in the oven of the regeneration device, detach the four tool hooks from the heat-insulating handle, take the special gripper out of the oven, close the oven door, adjust the oven temperature to the test temperature of 200°C, pass the regeneration gas, and conduct the catalytic plate regeneration test; after the regeneration test is completed, open the oven, hold the special gripper, hook the four tool hooks on the heat-insulating handle, and move the bracket and the catalytic plate out of the oven; After the temperature of the catalytic plate drops to room temperature, the regenerated catalytic plate is removed from the bracket and the above steps are repeated until the regeneration test of all catalytic plates is completed.

4. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized in that: The heat-insulating handle is a 130mm×50mm C-shaped structure with two rounded top corners. Two supports are set in the middle of the C-shaped structure. The heat-insulating handle is made of 6mm diameter stainless steel round steel.

5. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized in that: Square frame A is a 236mm×350mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel; square frame B is a 244mm×359mm rectangular frame with four rounded corners, made of 6mm diameter stainless steel round steel.

6. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized in that: The upper ends of the 41 isolation frames are of a concave-shaped structure, and the lower ends are of a C-shaped structure. The longest sides of the upper and lower ends are welded and made of 3mm diameter stainless steel round steel. The distance between each of the 41 isolation frames is 3mm.

7. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized by: Support rod A is a stainless steel round rod with a length of 224 mm and a diameter of 6 mm; support rod B is a stainless steel round rod with a length of 181 mm and a diameter of 6 mm.

8. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 1 is characterized by: The support frame is a U-shaped frame with a total length of 324mm, a horizontal long side width of 18mm, a vertical short side width of 10mm on both sides, and 41 pairs of 3mm diameter circular holes evenly distributed at intervals of 6.5mm on both sides of the short sides; 2 groups of U-shaped openings of the support frames are arranged outwards, with the U-shaped right-angled long sides parallel and the plane distance of 160mm.

9. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 2 is characterized by: The tool frame is a 344mm×120mm rectangular frame with four rounded corners, and is made of 10mm diameter stainless steel round steel; extraction handles are set on the inner side of the long sides of both sides of the tool frame, and are made of 6mm diameter stainless steel round steel.

10. The novel passive hydrogen recombiner regeneration test catalytic plate fixing bracket according to claim 2 is characterized in that: The tool hook is a 50mm×30mm L-shaped structure with rounded top corners, and is made of 3mm diameter stainless steel round steel; the 4 tool hooks are divided into 2 groups and are set on the short sides of both sides of the tool frame, and the spacing between each group of tool hooks is 93mm.

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