Catalytic performance test equipment for catalyst for thermochemical sulfur-iodine cycle hydrogen production

Abstract

The invention discloses catalytic performance test equipment for a catalyst for thermochemical sulfur-iodine cycle hydrogen production, and belongs to the technical field of hydrogen preparation, a plurality of reaction tubes are vertically arranged, and only catalyst layers in all the reaction tubes are different from one another; a spiral heat conduction pipe is arranged in the reaction pipe, the heat conduction pipe is spirally arranged in the axial direction of the reaction pipe, the heat conduction pipe penetrates through the heat conduction layer and the catalyst layer, and the heat conduction pipe is connected with high-temperature flue gas; a cylindrical bin with the diameter becoming larger is coaxially arranged at the bottom end in the reaction pipe, a turbine coaxially installed with the feeding pipe is arranged in the cylindrical bin, the turbine and the feeding pipe can be fixed or relatively rotationally installed, gas generated by catalytic reaction can be pumped downwards when the turbine is rotationally installed, and gas generated by catalytic reaction can be pumped downwards when the turbine is fixedly installed. And the spraying disc on the feeding pipe can spray sulfuric acid towards the periphery in a rotating posture. The catalytic activity test comparison of various catalysts can be carried out, the reaction is sufficient, and a foundation is laid for the accuracy of a test result.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen preparation equipment, in particular to catalytic performance testing equipment for catalysts used in thermochemical sulfur-iodine cycle hydrogen production. Background Art

[0002] Sulfur-iodine cycle hydrogen production is a thermochemical cycle hydrogen production method that aims to produce hydrogen efficiently and sustainably. Its basic principles are as follows: Sulfur-iodine cycle hydrogen production is mainly based on a series of chemical reactions. The whole process consists of three main reaction steps forming a cycle, which continuously consumes water to produce hydrogen and oxygen.

[0003] The first step is the Bunsen reaction: sulfur dioxide (SO2), iodine (I2) and water (H2O) react to produce sulfuric acid (H2SO4) and hydroiodic acid (HI). The chemical formula is SO2+I+2H2O=H2SO4+2HI. This reaction can be carried out at a relatively low temperature, generally around 90-120°C.

[0004] Step 2: Sulfuric acid decomposition reaction: When the sulfuric acid generated in the first step is heated to a high temperature, it will decompose to produce sulfur dioxide, oxygen and water under the action of a catalyst. The chemical equation is 2H2S04=2SO2+02+2H2O. The sulfur dioxide produced by the decomposition can be recycled back to the first step to continue participating in the reaction.

[0005] Step 3: Hydroiodic acid decomposition reaction: Hydroiodic acid decomposes into hydrogen and simple substance at a certain temperature (about 300-500℃), and the chemical equation is 2HI=H2+I2. The generated iodine can also be recycled back to the first step reaction and used again.

[0006] The raw material of the sulfur-iodine cycle hydrogen production process 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 way to produce hydrogen. In theory, the energy conversion efficiency of sulfur-iodine cycle hydrogen production is high. Compared with some traditional hydrogen production methods, it can more effectively use energy to convert water into hydrogen. In addition, the entire process does not produce greenhouse gas emissions, and no other pollutants are generated. It is environmentally friendly and meets the requirements of green energy development.

[0007] In the whole process of sulfur-iodine cycle hydrogen production, as one of the core research of catalysts, the research on the catalytic decomposition reaction of sulfuric acid is mainly focused on the activity research of its catalyst. At present, the experiments on this type of catalyst in sulfur-iodine cycle hydrogen production mainly rely on the existing sulfur-iodine cycle hydrogen production equipment, that is, they are carried out on the sulfuric acid decomposition reaction device. When the existing device is tested, high-temperature flue gas is generally used for heating. During the reaction process of each group of catalysts, they are tested in the same device. Therefore, the catalysts must be added one by one, and the tests are carried out separately and the reaction products are collected for record analysis. In this process, it is difficult to ensure that the temperature of the flue gas is consistent. Moreover, the collection of the gas produced by the catalysis after the reaction is not thorough, resulting in the direct impact on the result of the final gas metering method for detecting the catalytic activity. Therefore, it is very necessary to design a special test equipment for more accurate and reliable catalyst activity research. Summary of the invention

[0008] In view of the introduction of the above technical status, the purpose of the present invention is to provide a catalytic performance test equipment for catalysts used in thermochemical sulfur-iodine cycle hydrogen production. This test equipment can simulate the catalytic reaction test quickly and accurately under the premise of consistent reaction conditions other than the catalyst.

[0009] To achieve the above-mentioned purpose, a catalytic performance test device for a catalyst for hydrogen production by thermochemical sulfur-iodine cycle of the present invention comprises a reaction tube for catalytic decomposition of sulfuric acid, wherein the upper and lower parts of the reaction tube are filled with heat-conducting layers, a catalyst layer is filled between the two heat-conducting layers, and a feed pipe for supplying sulfuric acid from bottom to top passes axially through the reaction tube, and its top end is located near the inner wall of 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 pipe is arranged in the reaction tube, and the heat-conducting pipe passes through the heat-conducting layer and the catalyst layer along the axial direction of the reaction tube, and one end of the heat-conducting pipe is connected to the high-temperature flue gas. The other end of the reaction tube is connected, and the other end extends out of the reaction tube; a cylindrical bin with an enlarged diameter is coaxially provided at the bottom end of the reaction tube, and a turbine coaxially installed with the feed pipe is provided in the cylindrical bin, and the turbine can be fixedly or relatively rotatably installed with the feed pipe, wherein, 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 hole of the cylindrical bin; when the turbine and the feed pipe are fixedly installed, the gas generated by the catalytic reaction pushes the turbine downward to rotate, so that the feed pipe rotates synchronously with it, and an injection disk is fixed on the top outlet of the feed pipe, and the injection disk can spray sulfuric acid toward the surrounding in a rotating posture.

[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 an insulation chamber, and the top ports of all the heat conduction tubes are connected to an air supply pipe, and the air supply pipes are connected to a horizontally arranged main pipe. The main pipe is located above the insulation chamber and is connected to the chimney of the high-temperature flue gas.

[0019] Beneficial effects: The present invention sets up multiple groups of reaction tubes, and respectively puts in corresponding catalysts at the same time, and other conditions remain unchanged, so that high-temperature flue gas can enter each reaction tube at the same time, ensuring that the heat source supply conditions are as consistent as possible, and then, according to needs, the gas generated during the reaction is actively discharged by using a turbine, which can discharge the reaction gas more thoroughly, and then accurately collect and measure, which is conducive to accurately calculating and evaluating the catalytic activity, that is, the turbine can be strongly driven by the flow force when the flue gas is discharged, and the gas generated by the catalytic reaction is discharged more quickly for centralized collection. In addition, if the turbine and the feed pipe rotate in unison, then when the gas generated by the reaction flows downward and drives the turbine, it will also rotate with the feed pipe, so that sulfuric acid is rotated and sprayed out from the top port of the feed pipe, and is more evenly dispersed in the heat-conducting layer. After being fully and evenly heated, it flows evenly through the catalyst layer, uniformly contacts with the catalyst and fully reacts, which also lays a foundation for the accuracy of the study of catalytic activity. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure inside the cylindrical silo; Figure 3 This is the appearance structure diagram of the turbine; Figure 4 yes Figure 2 A magnified view of the structure at A in FIG. Figure 5 yes Figure 4 A magnified view of the structure at B in the middle; Figure 6 This is the installation structure diagram of the injection disc.

[0022] Explanation of component numbers: reaction tube 1, heat conducting layer 2, catalyst layer 3, heat conducting tube 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, plane bearing 16, air supply pipe 17, main pipe 18, drive bin 19, impeller 20, smoke exhaust pipe 21, air outlet 22, gas collecting hood 23, thermal insulation chamber 24. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be fully described below, and some core features of the embodiments will be specifically shown in the accompanying drawings, wherein 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. Other embodiments replaced by ordinary technicians based on these embodiments without the need for creative work also belong to the protection scope of the present invention.

[0024] See also Figure 1 The structure shown, the catalytic performance test equipment for the catalyst for the thermochemical sulfur-iodine cycle hydrogen production in this embodiment, includes a reaction tube 1 for catalytic decomposition of sulfuric acid, the upper and lower parts of the reaction tube 1 are filled with a heat-conducting layer 2 composed of silicon carbide, and a catalyst layer 3 is filled between the two heat-conducting layers 2. Specifically, the test can use a catalyst such as silicon carbide, aluminum oxide, etc. as a direct carrier, and the load can be a precious metal such as platinum, or a metal oxide such as ferric oxide, and the test is carried out with different catalyst types or different amounts of the same catalyst. This experimental equipment also includes a feed pipe 6 for sulfuric acid to be output from bottom to top. After axially passing through the reaction tube 1, its top is located near the inner wall of the top of the reaction tube 1, and sulfuric acid is sprayed from here. In order to compare the catalytic performance, this reaction tube 1 is vertically provided with three, and only the catalyst layer 3 in the three reaction tubes 1 is different from each other, that is, the rest of the heat-conducting layer 2 is the same, and the catalyst contained is different. Specifically, a spiral heat pipe 4 can be provided in the reaction tube 1, and the heat pipe 4 is arranged in a spiral shape along the axial direction of the reaction tube 1. The heat pipe 4 passes through the heat conductive layer 2 and the catalyst layer 3 to directly transfer heat to the corresponding parts, and one end of the heat pipe 4 is connected to the high-temperature flue gas, and the other end extends out of the reaction tube 1 to introduce the 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 of the reaction tube 1. In this cylindrical bin 5, a turbine 7 is specially provided coaxially with the feed pipe 6, and the turbine 7 can be fixedly or relatively rotated with the feed pipe 6, that is, its installation state can be adjusted according to use. Specifically, when the turbine 7 is installed 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 exhausted, mainly sulfur dioxide and oxygen generated after the catalytic reaction of sulfuric acid, and water vapor gasified at high temperature that may exist.

[0025] 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 Figure 6 As shown, a spray disc 14 is fixed on the top outlet of the feed pipe 6, so that the spray disc 14 can spray sulfuric acid in a rotating manner around, allowing the sulfuric acid to better pass through the heat conductive layer 2 and disperse in the catalyst layer 3 to perform a catalytic decomposition reaction.

[0026] The axle of the turbine 7 is a hollow structure so as to be coaxially sleeved on the feed pipe 6. Figure 2-4 , 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 therewith, while the other two sleeves are fixed as a whole and can be formed as one piece. In addition, an annular step is provided on each of the end faces where the second sleeve 9 and the first sleeve 8 are butted against each other. The two annular steps are spliced ​​and combined into an annular groove. An annular expansion ring 15 is embedded in the annular groove. The expansion ring 15 extends and expands in the vertical direction due to the compression from the outside. In addition, the present embodiment also includes a locking cylinder 12. The locking cylinder 12 is coaxially threadedly mounted on the second sleeve 9, and when the locking cylinder 12 is screwed upward to contact with 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 as a whole. That is, the expansion degree of the expansion ring 15 at this time is as shown in FIG. Figure 4 , so that the first sleeve 8 and the second sleeve 9 are axially pressed into contact and connected as a whole.

[0027] Specifically, when the locking cylinder 12 does not cover the expansion ring 15 and the expansion ring 15 is not squeezed by the locking cylinder 12, 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 expansion ring 15 is squeezed, and at this time, the first sleeve 8 and the second sleeve 9 form a fitting relationship in which they are fixed as one.

[0028] In addition, if Figure 4-5 In the present locking cylinder 12, a locking screw 11 is also screwed into the side wall, 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. 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. Then the locking cylinder 12 can rely on the locking screw 11 to maintain its inherent position.

[0029] like 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] In addition, in the above embodiments, Figure 1All reaction tubes 1 are fixed in an insulation chamber 24, and the top ports of all heat-conducting tubes 4 are connected to an air supply pipe 17. The air supply pipes 17 have the same length and are connected to a horizontally arranged main pipe 18. The main pipe 18 is located above the insulation chamber 24 and is connected to the chimney of the high-temperature flue gas, so that the high-temperature flue gas of the same temperature is synchronously delivered to each reaction tube 1, ensuring the consistency of the temperature of the catalytic reaction, so as to better distinguish the catalytic activity of each catalyst.

[0034] The above series of specific implementation details are merely some preferred embodiments of the present invention and cannot be used to limit the protection scope of the claims of the present invention. A person skilled in the art can simply change the design ideas based on the understanding of the above embodiments and the reference to the basic principles recorded in the claims of the present invention. However, these design changes 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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