Catalytic Performance Test Equipment for Catalysts Used in Thermochemical Sulfur-Iodine Cycle Hydrogen Production

Abstract

The catalyst catalytic performance test equipment for hydrogen production by the thermochemical sulfur-iodine cycle disclosed by the present invention belongs to the technical field of hydrogen production. A plurality of reaction tubes are vertically arranged, and only the catalyst layers in all the reaction tubes are different; a spiral heat conduction tube is arranged in the reaction tube, and the heat conduction tube is arranged in a spiral shape along the axial direction of the reaction tube. The heat conduction tube passes through the heat conduction layer and the catalyst layer, and the heat conduction tube is connected to high-temperature flue gas; at the bottom end in the reaction tube, there is a cylindrical bin with a gradually increasing diameter coaxially. A turbine coaxially installed with the feed pipe is arranged in the cylindrical bin, and the turbine can be fixedly installed or rotatably installed relative to the feed pipe. When rotatably installed, the gas generated by the catalytic reaction can be pumped downward, and when fixedly installed, the injection disk on the feed pipe can eject sulfuric acid in a rotating posture around. The present invention can conduct the catalytic activity test comparison of various catalysts, with sufficient reaction, laying a foundation for the accuracy of the test results.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production equipment, and specifically to a catalytic performance test equipment for a catalyst used in the thermochemical sulfur-iodine cycle for hydrogen production. Background Art

[0002] The sulfur-iodine cycle for hydrogen production is a thermochemical cycle for hydrogen production, aiming to produce hydrogen efficiently and sustainably. Its basic principle is as follows: The sulfur-iodine cycle for hydrogen production is mainly based on a series of chemical reactions. The whole process consists of three main reaction steps to form a cycle, continuously consuming water to produce hydrogen and oxygen.

[0003] In the first step, the Bunsen reaction: Sulfur dioxide (SO 2 ), iodine (I 2 ) and water (H 2 O) react to form sulfuric acid (H 2 SO 4 ) and hydroiodic acid (HI). The chemical equation is S0 2 +I+2H 2 O=H 2 SO 4 +2HI. This reaction can occur at a relatively low temperature, generally around 90 - 120 °C.

[0004] In the second step: Sulfuric acid decomposition reaction: When the sulfuric acid generated in the first step is heated to a high temperature, under the action of a catalyst, it will decompose to produce sulfur dioxide, oxygen and water. The chemical equation is 2H 2 S0 4 =2SO 2 +0 2 +2H 2 O. The sulfur dioxide generated by decomposition can be recycled back to the first step reaction to continue participating in the reaction.

[0005] In the third step: Hydroiodic acid decomposition reaction: Hydroiodic acid decomposes into hydrogen and iodine at a certain temperature (about 300 - 500 °C). The chemical equation is 2HI = H 2 + I 2 , and the iodine generated can also be recycled back to the first step reaction for reuse.

[0006] The raw material for the cycle process of the sulfur-iodine cycle for hydrogen production is mainly water. Water is an extremely abundant resource on the earth. As long as there is sufficient energy supply (such as nuclear energy, solar energy, etc.), hydrogen can be continuously produced. It is a sustainable hydrogen production method. Theoretically, the energy conversion efficiency of the sulfur-iodine cycle for hydrogen production is relatively high. Compared with some traditional hydrogen production methods, it can utilize energy more effectively to convert water into hydrogen. In addition, the whole process does not produce greenhouse gas emissions and no other pollutants are generated, which is environmentally friendly and meets the requirements of green energy development.

[0007] In the entire process of hydrogen production by the sulfur-iodine cycle, as one of the core research aspects of the catalyst, the research on the catalytic decomposition reaction of sulfuric acid mainly focuses on the activity research of its catalyst. Currently, the experiments on this type of catalyst in the sulfur-iodine cycle for hydrogen production mainly rely on the existing sulfur-iodine cycle hydrogen production equipment, that is, carried out on the sulfuric acid decomposition reaction device. When the existing device is used for experiments, generally high-temperature flue gas heating is adopted. During the reaction process of each group of catalysts, they are tested in the same device. Therefore, the catalysts need to be successively put in one by one, and the experiments are carried out separately, and the reaction products are collected and recorded for analysis. In this process, it is very difficult to ensure that the temperature of the flue gas is consistent. Moreover, the collection of the gas generated by catalysis after the reaction is not thorough enough, resulting in a direct impact on the result of detecting the catalytic activity by the method of gas metering. Therefore, it is very necessary to design a special test equipment for more accurately and reliably studying the catalytic activity of the catalyst. Summary of the Invention

[0008] In view of the above introduction of the technical status quo, the purpose of the present invention is to provide a test equipment for the catalytic performance of the catalyst for thermochemical sulfur-iodine cycle hydrogen production. This test equipment can quickly and accurately carry out catalytic reaction experiments on the premise that the reaction conditions other than the catalyst are consistent.

[0009] To achieve the above purpose, a test equipment for the catalytic performance of the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to the present invention includes a reaction tube for the catalytic decomposition of sulfuric acid. Heat-conducting layers are filled in the upper and lower parts of the reaction tube, and a catalyst layer is filled between the two heat-conducting layers. The feed pipe for supplying sulfuric acid to output upward axially passes through the reaction tube, and its top end is located at the inner wall near the top end of the reaction tube; three reaction tubes are vertically arranged, and only the catalyst layers in the three reaction tubes are different from each other; a spiral heat-conducting tube is arranged in the reaction tube, and the heat-conducting tube is arranged in a spiral shape along the axial direction of the reaction tube. The heat-conducting tube passes through the heat-conducting layer and the catalyst layer, and one end of the heat-conducting tube is connected to high-temperature flue gas, and the other end extends out of the reaction tube; at the bottom end in the reaction tube, there is a cylindrical chamber with a larger diameter coaxially. A turbine coaxially installed with the feed pipe is arranged in the cylindrical chamber, and the turbine can be fixedly installed or rotatably installed relative to the feed pipe. Among them, when the turbine is rotatably installed around the feed pipe, the gas generated by the catalytic reaction can be pumped downward and discharged through the exhaust holes of the cylindrical chamber; when the turbine is fixedly installed with the feed pipe, the gas generated by the catalytic reaction pushes the turbine to rotate downward, so that the feed pipe rotates synchronously with it, and a spray disc is fixed on the top outlet of the feed pipe, and the spray disc can spray sulfuric acid in a rotating posture around.

[0010] In this embodiment, the axle of the turbine is a hollow structure, which is coaxially sleeved on the feed pipe. The axle includes a first sleeve, a second sleeve and a third sleeve connected in sequence. The first sleeve is fixed on the end face of the turbine, and the other two sleeves are fixed as a whole; the second sleeve and the first sleeve are each provided with an annular step on the end faces that are connected to each other, and the two annular steps are spliced ​​and combined into an annular groove, and an annular expansion ring is embedded in the annular groove; it also includes a locking cylinder, which is coaxially threadedly installed on the second sleeve, and when the locking cylinder is screwed upwards to contact with the end face of the turbine, the expansion ring is squeezed to the position where the first sleeve and the second sleeve are fixed as a whole.

[0011] In this embodiment, when the locking cylinder does not cover the expansion ring, the first sleeve and the second sleeve form a fitting relationship in which they can be relatively rotatably installed. When the locking cylinder completely covers the expansion ring, the first sleeve and the second sleeve form a fitting relationship in which they are fixed as one.

[0012] In this embodiment, a locking screw is screwed into the side wall of the locking cylinder, and the locking screw extends into a threaded blind hole on the third sleeve to fix the locking cylinder on the third sleeve, and at this time the locking cylinder does not cover the expansion ring.

[0013] In this embodiment, a plane bearing is also installed on the end face between the first sleeve and the second sleeve, the feed pipe bearing passes through the plane bearing, and the first sleeve and the feed pipe are in friction contact. When the expansion ring is not squeezed by the locking tube, the gas generated by the catalytic reaction carries the turbine and the feed pipe to rotate synchronously relative to the second sleeve. When the expansion ring is squeezed, the driving assembly connected to the third sleeve can enable the first sleeve to overcome the friction and rotate relative to the feed pipe.

[0014] In this embodiment, the driving assembly includes a driving bin and an impeller installed in the driving bin. The impeller is coaxially fixed on the third sleeve. One end of the driving bin is connected to the bottom end of the heat pipe so that when the high-temperature flue gas flows into the driving bin through the heat pipe, it drives the impeller and the third sleeve to rotate and is discharged through the exhaust pipe installed on the driving bin.

[0015] In this embodiment, gas outlet holes are arranged around the bottom side wall of the cylindrical bin, and all the gas outlet holes are connected to an annular gas collecting hood sleeved on the outer wall of the cylindrical bin, and the gas collecting hood is used to discharge gas toward the gas container.

[0016] In this embodiment, the expansion ring is a hollow structure, and its outer surface is convex in an arc shape facing outwards.

[0017] In this embodiment, the interior of the expansion ring has an annular cavity with an equilateral triangle cross section, and one of the vertices is arranged toward the center of the outer side of the expansion ring.

[0018] In this embodiment, all reaction tubes are fixed in a heat-insulating chamber. The top ports of all the heat-conducting tubes are connected to an air supply pipeline, and all the air supply pipelines are connected to a main pipeline arranged horizontally. The main pipeline is located above the heat-insulating chamber and is connected to the chimney of high-temperature flue gas.

[0019] Beneficial effects: The present invention is provided with multiple groups of reaction tubes, and corresponding catalysts are respectively and simultaneously put in. With other conditions unchanged, high-temperature flue gas is simultaneously introduced into each reaction tube to ensure that the heat source supply conditions are as consistent as possible. Then, as needed, a turbine is used to actively discharge the gas generated during the reaction, so that the reaction gas can be discharged more thoroughly, and then accurately collected and measured, which is conducive to accurately calculating and evaluating the catalytic activity. That is to say, the turbine can be powerfully driven by the flow force when the flue gas is discharged, and the gas generated by the catalytic reaction can be discharged more quickly for centralized collection. In addition, if the turbine and the feed pipe are integrally rotationally matched, then when the gas generated by the reaction flows downward and pushes the turbine, it will also drive the feed pipe to rotate, so that sulfuric acid is sprayed out rotatably from the top port of the feed pipe, more evenly dispersed in the heat-conducting layer. After being evenly heated, it evenly flows through the catalyst layer, makes uniform contact with the catalyst and fully reacts, which also lays a foundation for the accuracy of the research on catalytic activity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following are the auxiliary diagrammatic illustrations for explaining some specific embodiments described in this specification. The described drawings are mainly the specific operation execution structures or method principles of some embodiments of the present invention, but this does not mean that the physical structure or operation steps of the present invention can only be those shown in the drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a schematic structural diagram inside the cylindrical bin;

[0023] Figure 3 is an external structural diagram of the turbine;

[0024] Figure 4 is Figure 2 the enlarged structural diagram at position A in

[0025] Figure 5 is Figure 4 the enlarged structural diagram at position B in

[0026] Figure 6 is the installation structural diagram of the injection disc.

[0027] Description of component labels: reaction tube 1, heat conduction layer 2, catalyst layer 3, heat conduction pipe 4, cylindrical bin 5, feed pipe 6, turbine 7, first sleeve 8, second sleeve 9, third sleeve 10, locking screw 11, locking cylinder 12, threaded blind hole 13, injection disc 14, expansion ring 15, plain bearing 16, air supply pipe 17, main pipe 18, drive bin 19, impeller 20, exhaust pipe 21, air outlet hole 22, gas collecting hood 23, heat insulation chamber 24. Specific implementation mode

[0028] The embodiments of the present invention will be comprehensively described below. Some core features of the embodiments will be specifically shown in the drawings, where the same or similar reference numerals in the drawings represent the same or similar technical features, or structures or steps or processes with similar functions. Based on these embodiments, other embodiments that can be replaced by those of ordinary skill in the art without creative efforts also fall within the protection scope of the present invention.

[0029] Please refer to Figure 1 the structure shown. The catalyst catalytic performance test equipment for the thermochemical sulfur-iodine cycle hydrogen production in this embodiment includes a reaction tube 1 for the catalytic decomposition of sulfuric acid. The upper and lower parts inside the reaction tube 1 are both filled with a heat conduction layer 2 composed of silicon carbide, and a catalyst layer 3 is filled between the two heat conduction layers 2. Specifically, catalysts that can be selected for the test, such as silicon carbide and aluminum oxide, etc., can be used as direct carriers, and the load can be precious metals such as platinum, or metal oxides such as iron sesquioxide. Tests are carried out with different catalyst types or different dosages of the same catalyst. This experimental equipment also includes a feed pipe 6 for supplying sulfuric acid to output from bottom to top. After passing through the reaction tube 1 axially, its top end is located at the inner wall near the top end of the reaction tube 1, and sulfuric acid is sprayed out from here. In order to compare the catalytic performance, three reaction tubes 1 are vertically provided. Only the catalyst layer 3 in the three reaction tubes 1 is different from each other, that is, the remaining heat conduction layers 2 are the same, and the difference lies in the catalysts contained. Specifically, a spiral heat conduction pipe 4 can be provided inside the reaction tube 1. The heat conduction pipe 4 is arranged spirally along the axial direction of the reaction tube 1. The heat conduction pipe 4 passes through the heat conduction layer 2 and the catalyst layer 3 to directly transfer heat to the corresponding parts. Moreover, one end of the heat conduction pipe 4 is connected to high-temperature flue gas, and the other end extends outside the reaction tube 1 to introduce high-temperature flue gas as a direct heat source. At the same time, a cylindrical bin 5 with a larger diameter is coaxially provided at the bottom end inside the reaction tube 1. Inside this cylindrical bin 5, a turbine 7 coaxially installed with the feed pipe 6 is specifically provided, and the turbine 7 can be fixedly or rotatably installed relative to the feed pipe 6, that is, its installation state can be adjusted according to the use. Specifically, when the turbine 7 rotates around the feed pipe 6, the gas generated by the catalytic reaction can be pumped downward and discharged through the exhaust hole of the cylindrical bin 5, and the gas generated by the catalytic reaction can be actively discharged, mainly sulfur dioxide and oxygen generated by the catalytic reaction of sulfuric acid, and possibly water vapor gasified at high temperature.

[0030] In the experiment, when the turbine 7 and the feed pipe 6 are fixedly installed, the gas generated by the catalytic reaction pushes the turbine 7 downward to rotate, so that the feed pipe 6 rotates synchronously with it, and as Figure 6 shown, a spray disc 14 is fixed at the top outlet of the feed pipe 6, so that the spray disc 14 can spray sulfuric acid around in a rotating posture, enabling the sulfuric acid to better pass through the heat conduction layer 2 and disperse in the catalyst layer 3 for catalytic decomposition reaction.

[0031] The axle of this turbine 7 is of a hollow structure to facilitate coaxial sleeving on the feed pipe 6, as Figures 2 - 4 shown. The axle includes a first sleeve 8, a second sleeve 9, and a third sleeve 10 connected in sequence. The first sleeve 8 is fixed on the end face of the turbine 7 and moves synchronously with it, while the other two sleeves are fixed together and can be integrally formed. In addition, on the end faces where the second sleeve 9 and the first sleeve 8 are butted against each other, there is an annular step respectively, and the two annular steps are spliced together to form an annular groove. An annular expansion ring 15 is embedded in this annular groove, and the expansion ring 15 will expand in the vertical direction when subjected to external extrusion. In addition, this embodiment further includes a locking cylinder 12, which is coaxially threadedly fitted and installed on the second sleeve 9. When the locking cylinder 12 is screwed upward until it abuts against the end face of the turbine 7, the expansion ring 15 is squeezed to the position where the first sleeve 8 and the second sleeve 9 are fixed together, that is, the expansion degree of the expansion ring 15 at this time, as Figure 4 shown, makes the first sleeve 8 and the second sleeve 9 axially squeeze and contact each other to be connected as a whole.

[0032] Specifically, it can be: when the locking cylinder 12 does not cover the expansion ring 15, the expansion ring 15 is not squeezed by the locking cylinder 12, and the first sleeve 8 and the second sleeve 9 form a relatively rotatable mounting fit relationship. When the locking cylinder 12 completely covers the expansion ring 15, the expansion ring 15 is squeezed, and at this time, the first sleeve 8 and the second sleeve 9 form a fixedly connected fit relationship.

[0033] In addition, as Figures 4 - 5 shown, a locking screw 11 is also screwed into the side wall of this locking cylinder 12, and the locking screw 11 extends into a threaded blind hole 13 on the third sleeve 10 to fix the locking cylinder 12 on the third sleeve 10. And at this time, the locking cylinder 12 does not cover the expansion ring 15, that is, the first sleeve 8 and the second sleeve 9 are not connected as a whole at this time, so the locking cylinder 12 can maintain its inherent position by relying on the locking screw 11.

[0034] As Figure 4As shown, in this embodiment, a plane bearing 16 is also installed on the end surface between the first sleeve 8 and the second sleeve 9, and the bearing of the feed pipe 6 passes through the plane bearing 16, and the first sleeve 8 and the feed pipe 6 are in friction contact, that is, the two will not rotate relative to each other under a certain torque, but temporarily form a whole. When the expansion ring 15 is not squeezed by the locking cylinder 12, the gas generated by the catalytic reaction flows downward, and can drive the turbine 7 and the feed pipe 6 to rotate synchronously relative to the second sleeve 9. The rotation of the feed pipe 6 can realize the rotary spraying of sulfuric acid; when the expansion ring 15 is squeezed, the driving assembly connected to the third sleeve 10 can make the first sleeve 8 overcome the friction and rotate relative to the feed pipe 6, that is, the driving force of the driving assembly can make the three sleeves and the locking cylinder 12 connected as a whole rotate around the feed pipe 6 together, so that the turbine 7 can actively draw the gas generated by the sulfuric acid catalytic reaction downward.

[0035] The structure of the above drive components, specifically, Figure 2 , mainly includes a driving chamber 19 and an impeller 20 installed in the driving chamber 19, the impeller 20 is coaxially fixed on the third sleeve 10, one end of the driving chamber 19 is connected to the bottom end of the heat pipe 4, so that when the high-temperature flue gas flows into the driving chamber 19 through the heat pipe 4, the impeller 20 and the third sleeve 10 are driven to rotate, that is, the turbine 7 is driven to rotate, and the flue gas is discharged through the exhaust pipe 21 installed on the driving chamber 19, so as to realize the operation of actively and thoroughly discharging the catalytic reaction gas, which is convenient for measuring the catalytic reaction gas generated in each reaction tube 1 to evaluate the activity of the catalyst.

[0036] In the above structure, if Figure 2 As shown, gas outlet holes 22 are provided around the bottom side wall of the cylindrical bin 5, and all the gas outlet holes 22 are connected to the annular gas collecting hood 23 sleeved on the outer wall of the cylindrical bin 5. The gas collecting hood 23 is used to discharge gas toward the gas container to fully collect the gas generated by the catalytic reaction.

[0037] As a specific implementation structure, such as Figure 4 The expansion ring 15 is a hollow structure, and its outer surface is convex in an arc shape (not shown in the figure), which is mainly convenient for squeezing the locking tube 12. When it is made, the interior of the expansion ring 15 has an annular cavity with an equilateral triangle cross section, and one of the vertices is set toward the center of the outer side of the expansion ring 15, which has a large squeezing force generated by expansion deformation.

[0038] In addition, in the above embodiments, Figure 1, all reaction tubes 1 are fixed within a heat insulation chamber 24. The top ports of all heat conduction tubes 4 are connected to an air supply pipeline 17. The air supply pipelines 17 have the same length and are all connected to a main pipeline 18 arranged horizontally. The main pipeline 18 is located above the heat insulation chamber 24 and is connected to the chimney of high-temperature flue gas, so as to synchronously transport high-temperature flue gas at the same temperature to each reaction tube 1, ensuring that the temperature of the catalytic reaction is consistent, in order to better distinguish the catalytic activities of various catalysts.

[0039] The above series of specific implementation details only show some preferred embodiments in the inventive concept itself, and cannot be used to limit the protection scope of the claims of the present invention. Based on the understanding of the above embodiments, those of ordinary skill in the art can simply change the design idea by referring to the basic principles recorded in the claims of the present invention, but these changed designs still fall within the protection scope of the invention.

Claims

1. A catalytic performance test device for a catalyst for thermochemical sulfur-iodine cycle hydrogen production, comprising a reaction tube (1) for catalytic decomposition of sulfuric acid, wherein the upper and lower parts of the reaction tube (1) are filled with heat-conducting layers (2), and a catalyst layer (3) is filled between the two heat-conducting layers (2); a feed pipe (6) for supplying sulfuric acid from bottom to top axially passes through the reaction tube (1), and its top outlet is located near the top of the reaction tube (1); characterized in that: A plurality of reaction tubes (1) are vertically arranged, and only the catalyst layers (3) in all the reaction tubes (1) are different from each other; a spiral heat-conducting tube (4) is arranged in the reaction tube (1), and the heat-conducting tube (4) is arranged in a spiral shape along the axial direction of the reaction tube (1). The heat-conducting tube (4) passes through the heat-conducting layer (2) and the catalyst layer (3), and one end of the heat-conducting tube (4) is connected to the high-temperature flue gas, and the other end extends out of the reaction tube (1); A cylindrical bin (5) with a larger diameter is coaxially provided at the bottom end of the reaction tube (1), and a turbine (7) is provided in the cylindrical bin (5) and is coaxially installed with the feed pipe (6). The turbine (7) can be installed fixedly or relatively rotatably with the feed pipe (6), wherein: When the turbine (7) is installed to rotate around the feed pipe (6), the gas generated by the catalytic reaction can be pumped downward and discharged through the exhaust hole of the cylindrical bin (5); When the turbine (7) and the feed pipe (6) are fixedly installed, the gas generated by the catalytic reaction pushes the turbine (7) downward to rotate, so that the feed pipe (6) rotates synchronously with it, and a spray disc (14) is fixed on the top outlet of the feed pipe (6), and the spray disc (14) can spray sulfuric acid in a rotating posture toward the surroundings.

2. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 1, characterized in that: The wheel shaft of the turbine (7) is a hollow structure, which is coaxially sleeved on the feed pipe (6), and the wheel shaft comprises a first sleeve (8), a second sleeve (9) and a third sleeve (10) connected in sequence, the first sleeve (8) is fixed on the end face of the turbine (7), and the other two sleeves are fixed as a whole; the end faces of the second sleeve (9) and the first sleeve (8) that are butted against each other are each provided with an annular step, and the two annular steps are spliced ​​and combined into an annular groove, and an annular expansion ring (15) is embedded in the annular groove; It also includes a locking cylinder (12) which is coaxially threadedly mounted on the second sleeve (9), and when the locking cylinder (12) is screwed upwards to come into contact with the end face of the turbine (7), the expansion ring (15) is squeezed to a position where the first sleeve (8) and the second sleeve (9) are fixed as a whole.

3. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 2, characterized in that: When the locking cylinder (12) does not cover the expansion ring (15), the first sleeve (8) and the second sleeve (9) form a fitting relationship in which they can be relatively rotatably installed. When the locking cylinder (12) completely covers the expansion ring (15), the first sleeve (8) and the second sleeve (9) form a fitting relationship in which they are fixed as one.

4. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 2, characterized in that: A locking screw (11) is also screwed into the side wall of the locking cylinder (12), and the locking screw (11) extends into a threaded blind hole (13) on the third sleeve (10) to fix the locking cylinder (12) on the third sleeve (10), and at this time the locking cylinder (12) does not cover the expansion ring (15).

5. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 2, characterized in that: A plane bearing (16) is also installed on the end surface between the first sleeve (8) and the second sleeve (9), and the bearing of the feed pipe (6) passes through the plane bearing (16), and the first sleeve (8) and the feed pipe (6) are in friction contact. When the expansion ring (15) is not squeezed by the locking cylinder (12), the gas generated by the catalytic reaction drives the turbine (7) and the feed pipe (6) to rotate synchronously relative to the second sleeve (9). When the expansion ring (15) is squeezed, the driving component connected to the third sleeve (10) can enable the first sleeve (8) to overcome the friction force and rotate relative to the feed pipe (6).

6. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 5, characterized in that: The driving assembly comprises a driving chamber (19) and an impeller (20) installed in the driving chamber (19); the impeller (20) is coaxially fixed on the third sleeve (10); one end of the driving chamber (19) is connected to the bottom end of the heat conducting pipe (4), so that when the high-temperature flue gas flows into the driving chamber (19) through the heat conducting pipe (4), the impeller (20) and the third sleeve (10) are driven to rotate, and the high-temperature flue gas is discharged through a smoke exhaust pipe (21) installed on the driving chamber (19).

7. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 2, characterized in that: Gas outlet holes (22) are arranged around the bottom side wall of the cylindrical bin (5), and all the gas outlet holes (22) are connected to an annular gas collecting hood (23) sleeved on the outer wall of the cylindrical bin (5), and the gas collecting hood (23) is used to discharge gas toward the gas container.

8. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 3, characterized in that: The expansion ring (15) is a hollow structure, and its outer surface is convex in an arc shape facing outwards.

9. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 8, characterized in that: The expansion ring (15) has an annular cavity with an equilateral triangle cross section inside, and one of the vertices is arranged toward the center of the outer side of the expansion ring (15).

10. The catalytic performance testing equipment for the catalyst for thermochemical sulfur-iodine cycle hydrogen production according to claim 1, characterized in that: All reaction tubes (1) are fixed in an insulation chamber (24), and the top ports of all the heat-conducting tubes (4) are connected to an air supply pipe (17). The air supply pipe (17) is connected to a horizontally arranged main pipe (18). The main pipe (18) is located above the insulation chamber (24) and is connected to a chimney of high-temperature flue gas.

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