Experimental low-temperature Claus sulfur recovery device

Abstract

The invention relates to an experimental low-temperature Claus sulfur recovery device, and relates to the technical field of sulfur recovery technology.The experimental low-temperature Claus sulfur recovery device comprises a workbench and a sulfur recovery assembly, four supporting columns are arranged on the lower end face of the workbench, a protective shell is arranged on the workbench, supporting rods are arranged in the supporting columns, and moving rollers are arranged at the bottom ends of the supporting rods; a first rack is arranged on one side of the supporting rod, a rotating wheel is arranged in the supporting column, a lifting plate is arranged on the other side of the rotating wheel, a second rack is arranged on one side of the lifting plate, a lifting groove is formed in one side of the supporting column, a lifting block is arranged in the lifting groove, one end of the lifting block is fixedly connected with the lifting plate, and the other end of the lifting block is fixedly connected with a vertical rod. Lifting air cylinders are arranged at the two ends of the protective shell correspondingly, cross rods are arranged on piston rods of the lifting air cylinders, and the two ends of each cross rod are connected with the two vertical rods on the same side correspondingly. The stable and fixed states of the workbench are switched by changing the position of the moving roller, so that the workbench is convenient to move, the flexibility of equipment is improved, and various experiments can be conveniently carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of sulfur recovery processes, and more particularly to a low-temperature Claus sulfur recovery device for experimental use. Background Art

[0002] The low-temperature Claus sulfur recovery device is an improved traditional Claus process, specifically designed to improve sulfur recovery efficiency under lower temperature conditions. This technology is particularly suitable for treating acid gas streams containing low concentrations of H2S and can achieve higher sulfur recovery rates while reducing energy consumption.

[0003] The related technology can refer to the patent with the publication number CN101519192B, which discloses a low-temperature Claus sulfur recovery process and device. The process includes a thermal reaction section, a catalytic reaction section, and a tail gas incineration section: in the combustion furnace of the thermal reaction section, part of the hydrogen sulfide reacts with oxygen to be converted into sulfur dioxide, and at high temperature, hydrogen sulfide and sulfur dioxide undergo a Claus reaction to generate sulfur. The process gas after sulfur separation enters the catalytic reaction section; in each reactor of the catalytic reaction section, hydrogen sulfide and sulfur dioxide successively undergo a conventional Claus reaction, catalyst regeneration, sub-dew point and sub-freezing point low-temperature Claus reactions; the tail gas after sulfur separation after the catalytic reaction section enters the tail gas incineration section and is incinerated and discharged in the tail gas incinerator. This application uses a lower reaction temperature, which is beneficial to the chemical equilibrium shifting towards the direction of sulfur generation. Therefore, the sulfur conversion rate and recovery rate are improved, and the process flow is simple, the equipment and investment are relatively small, the operating cost is low, and it is more environmentally friendly.

[0004] In view of the above related technology, in the actual application of sulfur recovery using the low-temperature Claus process, most of the existing devices are designed for large-scale industrial production, with high system integration, fixed structures, and poor flexibility, making it difficult to meet the needs of systematically studying the low-temperature Claus reaction characteristics during scientific research and process optimization. Therefore, there is an urgent need to develop an experimental low-temperature Claus sulfur recovery device suitable for laboratory environments. Summary of the Invention

[0005] In order to improve the flexibility of the device, the present invention provides an experimental low-temperature Claus sulfur recovery device.

[0006] The present invention provides an experimental low-temperature Claus sulfur recovery device, adopting the following technical solutions: A low-temperature Claus sulfur recovery device for experiments, comprising a workbench and a sulfur recovery assembly arranged on the workbench. Four support columns are provided at the lower end surface of the workbench. A protective shell is arranged on the workbench, and the sulfur recovery assembly is located inside the protective shell. The support columns are hollow cavities. A support rod is arranged inside the support columns. A moving roller is provided at the bottom end of the support rod. A first rack is arranged on one side of the support rod. A rotating wheel is arranged inside the support column. A lifting plate is arranged on the side of the rotating wheel away from the support rod. A second rack is arranged on the side of the lifting plate close to the rotating wheel. The rotating wheel is respectively engaged with the first rack and the second rack. A lifting groove is opened on one side of the support column. A lifting block is slidably connected inside the lifting groove. One end of the lifting block is fixedly connected to the lifting plate, and the other end is fixedly connected to a vertical rod. The vertical rod penetrates through the workbench. Lifting cylinders are provided at both ends of the protective shell. A cross bar is fixedly connected to the piston rod of the lifting cylinder. The two ends of the cross bar are respectively connected to the two vertical rods on the same side.

[0007] By adopting the above technical solution, when it is necessary to change the position of the device, the staff first starts the lifting cylinder. The lifting cylinder drives the cross bar to move upward, thereby driving the vertical rod to move upward. The upward movement of the vertical rod drives the rotating wheel to rotate, thereby driving the support rod to descend. The descent of the support rod will drive the moving roller to move downward, thereby gradually supporting the entire device. Since it is an experimental device, the overall weight is within the structural bearing range. At this time, with the assistance of the moving roller, it is convenient to change the position of the device, which is beneficial to improving the flexibility of the equipment; when it is necessary to fix the device, the staff starts the lifting cylinder again. The lifting cylinder descends, thereby driving the vertical rod to descend, and at the same time the support rod moves upward, so that the support point of the device is transferred from the moving roller to the support column and the vertical rod, which is beneficial to ensuring the stability of the device.

[0008] Optionally, movable holes are opened on both sides of the protective shell. Sliding folding doors are arranged at the movable holes of the protective shell. Two clamping rings are arranged inside the protective shell. The two clamping rings are oppositely arranged on the inner wall of the sliding folding door. The clamping rings are located at one end of the sliding folding door close to the combustion furnace. When the workbench is stable, the top end of the support rod is located inside the clamping ring, and the bottom end of the vertical rod and the bottom end of the support column are located on the same horizontal plane.

[0009] By adopting the above technical solution, when the device is idle, the moving roller serves as the main support point. At this time, the staff can open the sliding folding door to repair or replace the internal equipment. Also, because the device has a certain temperature change inside during operation, it is necessary to ensure the safety of the protective shell during operation; therefore, when it is necessary to fix the position, the staff starts the lifting cylinder. The lifting cylinder descends, thereby driving the vertical rod to descend, and at the same time the support rod moves upward, so that the support point of the device is transferred from the moving roller to the support column and the vertical rod. At the same time, the top end of the support rod will gradually pass through the clamping ring, realizing the internal fixation of the sliding folding door to prevent it from being accidentally opened during the operation, which may lead to experimental accidents, and is beneficial to improving the safety of the device.

[0010] Optionally, the sulfur recovery component includes a combustion furnace for performing partial oxidation reaction of H2S. The combustion furnace is located inside the protective shell. An intake pipe is connected to one side of the combustion furnace, and an intake valve is provided on the intake pipe. The other side of the combustion furnace is sequentially connected to a waste heat boiler through a pipeline for recovering heat, a primary catalytic reactor for carrying out the Claus reaction, a primary sulfur condenser for cooling the gas, a secondary catalytic reactor for reacting the remaining gas, and a secondary sulfur condenser for sulfur condensation. A storage tank is also provided inside the protective shell. The primary sulfur condenser, the primary catalytic reactor, the secondary catalytic reactor, and the secondary sulfur condenser are all connected to the storage tank. One end of the storage tank away from the combustion furnace is connected to a second outlet pipe, and one end of the secondary sulfur condenser away from the combustion furnace is connected to a first outlet pipe. Outlet valves are provided on both the first outlet pipe and the second outlet pipe. Specific catalysts are pre-loaded inside both the primary catalytic reactor and the secondary catalytic reactor.

[0011] By adopting the above technical solution, when sulfur needs to be recovered through the sulfur recovery component, the staff opens the intake valve, absorbs the sour gas containing hydrogen sulfide through the intake pipe, and makes it react with oxygen in the combustion furnace to generate sulfur dioxide ( ). The gas coming out of the combustion furnace passes through the waste heat boiler to recover heat for preheating the feed gas or generating steam. The gas enters the primary catalytic reactor, and under the action of the supported catalyst, H2S and SO2 carry out the Claus reaction to generate elemental sulfur ( ). The reaction product enters the primary sulfur condenser to condense the generated sulfur vapor into liquid sulfur, which flows into the storage tank. The gas that has not fully reacted continues to enter the secondary catalytic reactor to carry out the Claus reaction again. The sulfur generated by the reaction is further condensed and separated in the secondary sulfur condenser, and the condensed and separated liquid sulfur will be collected in the storage tank, and the residual gas is collected through the first outlet pipe.

[0012] Optionally, both ends of the cross bar are fixedly connected with connecting rods. The connecting rods are horizontally arranged. One end of the connecting rod is fixedly connected to the cross bar, and the other end is hinged with a connecting rod. A push rod is provided between adjacent connecting rods. A fixing groove for fixing the pipeline is opened on the push rod. When the workbench is stable, the intake pipe, the first outlet pipe, and the second outlet pipe are respectively located at the fixing grooves of the corresponding push rods.

[0013] By adopting the above technical solution, when the device needs to be fixed, the staff starts the lifting cylinder. The lifting cylinder drives the cross bar to move downward, thereby driving the connecting rod to move downward, and then driving the connecting rod to move downward. Then the staff pulls down the push rod to fix the fixing groove of the push rod to the corresponding pipeline, avoiding the situation that the pipeline shakes due to the instability of the air flow when transporting gas, which is beneficial to improving the stability of the device; when the device needs to be moved, the staff can directly push the equipment through the push rod, which is convenient for operation and beneficial to improving work efficiency.

[0014] Optionally, Co-Mo is used as the catalyst in the primary catalytic reactor, and Al2O3 is used as the catalyst in the secondary catalytic reactor.

[0015] By adopting the above technical solution, in the primary catalytic reactor, since the H2S concentration in the gas is relatively high, an efficient catalyst is required to ensure that as much H2S as possible is converted into sulfur. Therefore, the Co-Mo based catalyst is selected to maximize the utilization of its high activity characteristics and achieve a high conversion rate in the initial conversion stage. After the primary catalytic reaction, most of the H2S has been converted into sulfur, and the H2S concentration in the gas entering the secondary catalytic reactor has been significantly reduced. At this time, using alumina as the catalyst can not only continue to capture the remaining H2S, but also be an economical and effective solution, avoiding the use of expensive Co-Mo catalysts throughout the system.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects: By providing a workbench, a sulfur recovery component, support columns, a protective shell, support rods, moving rollers, a first rack, a rotating wheel, a lifting plate, a second rack, a lifting groove, a lifting block, a vertical rod, a lifting cylinder, and a crossbar, when the position of the device needs to be changed, the operator first starts the lifting cylinder. The lifting cylinder drives the crossbar to move upward, thereby driving the vertical rod to move upward. The upward movement of the vertical rod drives the rotating wheel to rotate, thereby driving the support rod to descend. The descent of the support rod drives the moving roller to descend, gradually supporting the entire device. Since it is an experimental device and the overall weight is within the load-bearing range of the structure, with the assistance of the moving roller at this time, it is convenient to change the position of the device, which is beneficial to improving the flexibility of the equipment; when the device needs to be fixed, the operator starts the lifting cylinder again. The lifting cylinder descends, driving the vertical rod to descend, and at the same time the support rod moves upward, so that the support point of the device is transferred from the moving roller to the support column and the vertical rod, which is beneficial to ensuring the stability of the device. By providing a combustion furnace, an inlet pipe, an inlet valve, a waste heat boiler, a primary catalytic reactor, a primary sulfur condenser, a secondary catalytic reactor, a secondary sulfur condenser, and a storage tank, when sulfur needs to be recovered through the sulfur recovery component, the operator opens the inlet valve and absorbs the sour gas containing hydrogen sulfide through the inlet pipe, making it react with oxygen in the combustion furnace to generate sulfur dioxide. The gas leaving the combustion furnace passes through the waste heat boiler to recover heat for preheating the raw material gas or generating steam. The gas enters the primary catalytic reactor, and under the action of the supported catalyst, H2S and SO2 undergo the Claus reaction to generate elemental sulfur. The reaction product enters the primary sulfur condenser to condense the generated sulfur vapor into liquid sulfur, which flows into the storage tank. The gas that has not fully reacted continues to enter the secondary catalytic reactor for the Claus reaction again. The sulfur generated by the reaction is further condensed and separated in the secondary sulfur condenser, and the condensed liquid sulfur is collected in the storage tank. The residual gas is collected via the first outlet pipe. By setting a cross bar, a connecting rod, a connecting rod, a push rod and a fixing groove, when the workbench is stable, for the intake pipe, the first outlet pipe and the second outlet pipe, when a fixing device is needed, the staff starts the lifting cylinder, the lifting cylinder drives the cross bar to move downward, thereby driving the connecting rod to move downward, and then driving the connecting rod to move downward. Then, the staff pulls down the push rod to fix the fixing groove of the push rod to the corresponding pipeline, avoiding the situation of shaking due to the instability of the air flow when the pipeline transports gas, which is beneficial to improving the stability of the device; when the device needs to be moved, the staff can directly push the device through the push rod, which is convenient for operation and beneficial to improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of a low-temperature Claus sulfur recovery device for experimental use.

[0018] Figure 2 is a schematic diagram of the structure of removing the top cover of the protective shell of a low-temperature Claus sulfur recovery device for experimental use.

[0019] Figure 3 is Figure 2 the enlarged view of part A in

[0020] Figure 4 is a partial schematic diagram highlighting the moving component.

[0021] Description of the reference numerals: 1, workbench; 2, sulfur recovery component; 21, combustion furnace; 211, intake pipe; 212, intake valve; 22, waste heat boiler; 23, primary catalytic reactor; 24, primary sulfur condenser; 25, secondary catalytic reactor; 251, first outlet pipe; 26, secondary sulfur condenser; 27, storage tank; 271, second outlet pipe; 28, outlet valve; 3, moving component; 31, support column; 32, rotating wheel; 33, protective shell; 331, movable hole; 332, sliding folding door; 333, snap ring; 34, support rod; 35, moving roller; 36, first rack; 37, lifting plate; 371, second rack; 38, lifting block; 381, vertical rod; 382, cross bar; 383, connecting rod; 384, connecting rod; 385, push rod; 386, fixing groove; 39, lifting cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below with reference to all the drawings.

[0023] The embodiments of the present invention disclose a low-temperature Claus sulfur recovery device for experimental use.

[0024] Referring to Figures 1 to 4, A low-temperature Claus sulfur recovery device for experiments, comprising a workbench 1, a sulfur recovery component 2, and a moving component 3. The sulfur recovery component 2 is arranged on the workbench 1, and the moving component 3 is arranged on the lower end surface of the workbench 1. The workbench 1 supports and fixes the components of the device. The sulfur recovery component 2 absorbs the acidic gas containing H2S and generates elemental sulfur. The moving component 3 controls the flexibility of the device to ensure its stability during the working state.

[0025] Refer to Figures 1 to 4 , The sulfur recovery component 2 includes a combustion furnace 21 for performing the partial oxidation reaction of H2S. The combustion furnace 21 is located inside a protective shell 33. One side of the combustion furnace 21 is connected to an inlet pipe 211, and an inlet valve 212 is provided on the inlet pipe 211. The other side of the combustion furnace 21 is sequentially connected to a waste heat boiler 22 through a pipeline for recovering heat; a first-stage catalytic reactor 23 for performing the Claus reaction; a first-stage sulfur condenser 24 for cooling the gas; a second-stage catalytic reactor 25 for reacting the remaining gas and a second-stage sulfur condenser 26 for sulfur condensation. A storage tank 27 is also provided inside the protective shell 33. The first-stage sulfur condenser 24, the first-stage catalytic reactor 23, the second-stage catalytic reactor 25, and the second-stage sulfur condenser 26 are all connected to the storage tank 27. One end of the storage tank 27 away from the combustion furnace 21 is connected to a second outlet pipe 271, and one end of the second-stage sulfur condenser 26 away from the combustion furnace 21 is connected to a first outlet pipe 251. Outlet valves 28 are provided on both the first outlet pipe 251 and the second outlet pipe 271. Specific catalysts are pre-loaded inside both the first-stage catalytic reactor 23 and the second-stage catalytic reactor 25.

[0026] Refer to Figures 1 to 4 , When sulfur needs to be recovered through the sulfur recovery component 2, the staff opens the inlet valve 212 and absorbs the acid gas containing hydrogen sulfide through the inlet pipe 211, making it react with oxygen inside the combustion furnace 21 to generate sulfur dioxide ( ), The gas exiting the combustion furnace 21 passes through the waste heat boiler 22 to recover heat for preheating the raw material gas or generating steam. The gas enters the first-stage catalytic reactor 23, and under the action of the supported catalyst, H2S and SO2 undergo the Claus reaction to generate elemental sulfur ( ), The reaction product enters the first-stage sulfur condenser 24 to condense the generated sulfur vapor into liquid sulfur, which then flows into the storage tank 27. The gas that has not fully reacted continues to enter the second-stage catalytic reactor 25 for the Claus reaction again. The sulfur generated by the reaction is further condensed and separated in the second-stage sulfur condenser 26. The condensed and separated liquid sulfur will be collected into the storage tank 27, and the residual gas is collected via the first outlet pipe 251.

[0027] Refer to Figures 1 to 4, the catalyst in the primary catalytic reactor 23 is Co-Mo, and the catalyst in the secondary catalytic reactor 25 is Al2O3. In the primary catalytic reactor 23, since the H2S concentration in the gas is relatively high, an efficient catalyst is required to ensure that as much H2S as possible is converted into sulfur. Therefore, the Co-Mo-based catalyst is selected to maximize the use of its high-activity characteristics and achieve a high conversion rate in the initial conversion stage. After the primary catalytic reaction, most of the H2S has been converted into sulfur, and the H2S concentration in the gas entering the secondary catalytic reactor 25 has decreased significantly. At this time, using alumina as the catalyst can not only continue to capture the remaining H2S but also serve as an economical and effective solution, avoiding the use of expensive Co-Mo catalysts throughout the system.

[0028] Refer to Figures 1 to 4 , the moving component 3 includes four support columns 31 and rotating wheels 32 arranged inside the support columns 31. The four support columns 31 are evenly arranged on the lower end surface of the workbench 1. A protective shell 33 is provided on the workbench 1, and the sulfur recovery component 2 is located inside the protective shell 33. The support column 31 is a hollow cavity, and a support rod 34 is provided inside the support column 31. A moving roller 35 is provided at the bottom end of the support rod 34. A first rack 36 is provided on one side of the support rod 34. A lifting plate 37 is provided on the side of the rotating wheel 32 away from the support rod 34. A second rack 371 is provided on the side of the lifting plate 37 close to the rotating wheel 32. The rotating wheel 32 is respectively engaged with the first rack 36 and the second rack 371. A lifting groove is formed on one side of the support column 31, and a lifting block 38 is slidably connected inside the lifting groove. One end of the lifting block 38 is fixedly connected to the lifting plate 37, and the other end is fixedly connected to a vertical rod 381. The vertical rod 381 passes through the workbench 1. Lifting cylinders 39 are provided at both ends of the protective shell 33. A cross bar 382 is fixedly connected to the piston rod of the lifting cylinder 39. The two ends of the cross bar 382 are respectively connected to the two vertical rods 381 on the same side.

[0029] Refer to Figures 1 to 4 , when it is necessary to change the position of the device, the staff first starts the lifting cylinder 39. The lifting cylinder 39 drives the cross bar 382 to move upward, thereby driving the vertical rod 381 to move upward. The upward movement of the vertical rod 381 drives the rotating wheel 32 to rotate, thereby driving the support rod 34 to descend. The descent of the support rod 34 will drive the moving roller 35 to descend, thereby gradually supporting the entire device. Since it is an experimental device, the overall weight is within the structural bearing range. At this time, with the assistance of the moving roller 35, it is convenient to change the position of the device, which is beneficial to improving the flexibility of the equipment; when it is necessary to fix the device, the staff starts the lifting cylinder 39 again. The lifting cylinder 39 descends, thereby driving the vertical rod 381 to descend. At the same time, the support rod 34 moves upward, so that the support point of the device is transferred from the moving roller 35 to the support column 31 and the vertical rod 381, which is beneficial to ensuring the stability of the device.

[0030] Reference Figures 1 to 4 As shown in Figures 1 to 4 , movable holes 331 are formed on both sides of the protective shell 33. A sliding folding door 332 is provided at the movable hole 331 of the protective shell 33. Two clamping rings 333 are arranged inside the protective shell 33. The two clamping rings 333 are oppositely arranged on the inner wall of the sliding folding door 332. The clamping ring 333 is located at one end of the sliding folding door 332 close to the combustion furnace 21. When the workbench 1 is stable, the top end of the support rod 34 is located inside the clamping ring 333, and the bottom end of the vertical rod 381 and the bottom end of the support column 31 are on the same horizontal plane.

[0031] Reference Figures 1 to 4 As shown in Figures 1 to 4 , when the device is idle, the moving roller 35 serves as the main support point. At this time, the staff can open the sliding folding door 332 to repair or replace the internal equipment. Also, because the device has a certain temperature change inside during operation, the safety of the protective shell 33 during operation needs to be ensured. Therefore, when the position needs to be fixed, the staff starts the lifting cylinder 39, and the lifting cylinder 39 descends, thereby driving the vertical rod 381 to descend. At the same time, the support rod 34 moves upward, so that the support point of the device is transferred from the moving roller 35 to the support column 31 and the vertical rod 381. At the same time, the top end of the support rod 34 will gradually pass through the clamping ring 333 to fix the sliding folding door 332 from the inside, preventing it from being accidentally opened during operation and causing experimental accidents, which is beneficial to improving the safety of the device.

[0032] Reference Figures 1 to 4 As shown in Figures 1 to 4 , connecting rods 383 are fixedly connected to both ends of the cross bar 382. The connecting rods 383 are horizontally arranged. One end of the connecting rod 383 is fixedly connected to the cross bar 382, and the other end is hinged with a connecting rod 384. A push rod 385 is arranged between adjacent connecting rods 384. Fixing grooves 386 for fixing pipelines are formed on the push rod 385. When the workbench 1 is stable, the intake pipe 211, the first exhaust pipe 251, and the second exhaust pipe 271 are respectively located at the fixing grooves 386 of the corresponding push rods 385.

[0033] Reference Figures 1 to 4 When the device needs to be fixed, the staff starts the lifting cylinder 39. The lifting cylinder 39 drives the cross bar 382 to descend, thereby driving the connecting rod 383 to move downward, and further driving the connecting rod 384 to move downward. Then the staff pulls down the push rod 385 to fix the corresponding pipeline in the fixing groove 386 of the push rod 385, preventing the pipeline from shaking due to the instability of the air flow when transporting gas, which is beneficial to improving the stability of the device. When the device needs to be moved, the staff can directly push the equipment through the push rod 385, which is convenient for operation and beneficial to improving work efficiency.

[0034] The implementation principle of a low-temperature Claus sulfur recovery device for experiments in an embodiment of the present invention is as follows: When sulfur needs to be recovered through the sulfur recovery component 2, the staff opens the intake valve 212, absorbs the sour gas containing hydrogen sulfide through the intake pipe 211, and makes it react with oxygen in the combustion furnace 21 to generate sulfur dioxide ( ), the gas exiting the combustion furnace 21 passes through the waste heat boiler 22 to recover heat for preheating the feed gas or generating steam. The gas enters the first-stage catalytic reactor 23, where H2S and SO2 undergo the Claus reaction to generate elemental sulfur ( ). The reaction product enters the first-stage sulfur condenser 24 to condense the generated sulfur vapor into liquid sulfur, which then flows into the storage tank 27. The gas that has not fully reacted continues to enter the second-stage catalytic reactor 25 for another Claus reaction. The sulfur generated by the reaction is further condensed and separated in the second-stage sulfur condenser 26. The condensed and separated liquid sulfur will be collected in the storage tank 27, and the residual gas is collected via the first outlet pipe 251.

[0035] The above are all preferred embodiments of the present invention. The protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A low-temperature Claus sulfur recovery device for experiments, comprising a workbench (1) and a sulfur recovery component (2) arranged on the workbench (1), characterized in that, The lower end surface of the workbench (1) is provided with four support columns (31). A protective shell (33) is arranged on the workbench (1). The sulfur recovery assembly (2) is located inside the protective shell (33). The support column (31) is a hollow cavity. A support rod (34) is arranged inside the support column (31). A moving roller (35) is arranged at the bottom end of the support rod (34). A first rack (36) is arranged on one side of the support rod (34). A rotating wheel (32) is arranged inside the support column (31). A lifting plate (37) is arranged on the side of the rotating wheel (32) away from the support rod (34). A second rack (371) is arranged on the side of the lifting plate (37) close to the rotating wheel (32). The rotating wheel (32) is respectively meshed with the first rack (36) and the second rack (371). A lifting groove is formed on one side of the support column (31). A lifting block (38) is slidably connected inside the lifting groove. One end of the lifting block (38) is fixedly connected to the lifting plate (37), and the other end is fixedly connected to a vertical rod (381). The vertical rod (381) penetrates through the workbench (1). Lifting cylinders (39) are arranged at both ends of the protective shell (33). A cross bar (382) is fixedly connected to the piston rod of the lifting cylinder (39). The two ends of the cross bar (382) are respectively connected to the two vertical rods (381) on the same side.

2. The experimental low-temperature Claus sulfur recovery device according to claim 1, wherein, Moving holes (331) are formed on both sides of the protective shell (33). A sliding folding door (332) is arranged at the moving hole (331) of the protective shell (33). Two clamping rings (333) are arranged inside the protective shell (33). The two clamping rings (333) are oppositely arranged on the inner wall of the sliding folding door (332). The clamping ring (333) is located at one end of the sliding folding door (332) close to the combustion furnace (21). When the workbench (1) is stable, the top end of the support rod (34) is located inside the clamping ring (333), and the bottom end of the vertical rod (381) and the bottom end of the support column (31) are located on the same horizontal plane.

3. An experimental low-temperature Claus sulfur recovery device according to claim 1, characterized in that, The sulfur recovery component (2) includes a combustion furnace (21) for performing partial oxidation reaction of H2S. The combustion furnace (21) is located inside the protective shell (33). One side of the combustion furnace (21) is connected to an intake pipe (211), and an intake valve (212) is provided on the intake pipe (211). The other side of the combustion furnace (21) is sequentially connected to a waste heat boiler (22) through a pipeline for recovering heat; a first-stage catalytic reactor (23) for carrying out the Claus reaction; a first-stage sulfur condenser (24) for cooling the gas; a second-stage catalytic reactor (25) for reacting the remaining gas and a second-stage sulfur condenser (26) for sulfur condensation. A storage tank (27) is further provided inside the protective shell (33). The first-stage sulfur condenser (24), the first-stage catalytic reactor (23), the second-stage catalytic reactor (25) and the second-stage sulfur condenser (26) are all connected to the storage tank (27). One end of the storage tank (27) far from the combustion furnace (21) is connected to a second outlet pipe (271), and one end of the second-stage sulfur condenser (26) far from the combustion furnace (21) is connected to a first outlet pipe (251). Outlet valves (28) are provided on both the first outlet pipe (251) and the second outlet pipe (271). Specific catalysts are pre-loaded inside both the first-stage catalytic reactor (23) and the second-stage catalytic reactor (25).

4. An experimental low-temperature Claus sulfur recovery device according to claim 3, characterized in that, Both ends of the cross bar (382) are fixedly connected with connecting rods (383). The connecting rods (383) are horizontally arranged. One end of the connecting rod (383) is fixedly connected with the cross bar (382), and the other end is hinged with a connecting rod (384). A push rod (385) is provided between adjacent connecting rods (384). A fixing groove (386) for fixing the pipeline is formed on the push rod (385). When the workbench (1) is stable, the intake pipe (211), the first outlet pipe (251) and the second outlet pipe (271) are respectively located at the fixing grooves (386) of the corresponding push rods (385).

5. An experimental low-temperature Claus sulfur recovery device according to claim 3, characterized in that, The catalyst in the first-stage catalytic reactor (23) is Co-Mo, and the catalyst in the second-stage catalytic reactor (25) is Al2O3.

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