A spiral bend heat storage gas-solid phase reactor

Abstract

The present invention belongs to the technical field of thermal storage reactors, specifically a spiral elbow thermal storage gas-solid phase reactor, comprising a reactor shell and an inner spiral reaction unit, an outer spiral reaction unit and an elbow connecting pipe respectively placed in the reactor shell, the inner spiral reaction unit and the outer spiral reaction unit both spiral upward from the bottom of the reactor shell in the axial direction of the reactor shell, the elbow connecting pipe is placed in the radial direction of the reactor shell, the inner spiral reaction unit is connected to the outer spiral reaction unit through the elbow connecting pipe, a hydrogen inlet and a hydrogen outlet are respectively provided on the reactor shell, the hydrogen inlet is connected to the hydrogen outlet through the outer spiral reaction unit, the elbow connecting pipe and the inner spiral reaction unit in sequence, and the reactor shell is further filled with thermal storage material. The thermal storage gas-solid phase reactor of the present invention adopts a double spiral and elbow coupled structure, which can enhance heat transfer, realize heat storage function, and improve hydrogen storage and release performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal storage reactors, in particular to a spiral elbow thermal storage gas-solid phase reactor, which is particularly suitable for hydrogen storage and release gas-solid phase reactions of metal hydrides. Background Art

[0002] Hydrogen exists mainly in the form of gas, with a very low density. It is easy to diffuse in the air and is flammable and explosive. Based on these characteristics, the safety of hydrogen storage and transportation has become a research focus in the process of people using hydrogen. Currently, the more common and practical means of hydrogen storage and transportation include: high-pressure gaseous hydrogen storage, low-temperature liquid hydrogen storage, metal hydride hydrogen storage, coordination hydride hydrogen storage, inorganic and organic hydrogen storage, and adsorption hydrogen storage. Today's hydrogen storage methods are divided into three types: gaseous hydrogen storage, liquid hydrogen storage, and solid hydrogen storage. Gaseous hydrogen storage requires heavy pressure-resistant containers, which poses a safety hazard of leakage and container explosion. Liquid hydrogen storage requires a lot of cooling energy, which increases the cost of hydrogen storage. Solid-state hydrogen storage can generally be safe, efficient, and high-density, and is a more ideal hydrogen storage method. Among them, metal hydride hydrogen storage has the advantages of high hydrogen storage density, good safety, and high hydrogen purity, and is widely used as a core component of hydrogen storage systems.

[0003] Since metal hydrides release a large amount of heat during the hydrogen absorption process, the thermal stress caused by uneven temperature distribution and the extrusion stress caused by the volume expansion of the metal hydride during the reaction process can seriously damage the heat exchange channels inside the reactor. When the thermal stress is too large, the heat exchange tubes will bend and deform, affecting the subsequent use of the reaction device and thus restricting the performance improvement of the reaction system. Therefore, enhanced heat transfer in hydrogen storage reactors plays a very important role in the hydrogen storage process.

[0004] At present, spiral tube reactors are commonly used to solve the problem of heat exchange tube deformation. At the same time, this reactor has a large heat exchange area and a small heat transfer distance. At present, single spiral tube reactors have problems such as uneven reaction heat within the system and poor heat transfer capacity. Double spiral tube reactors have two spiral tubes that react independently of each other, the overall reaction rate is inconsistent, and the internal uniformity is poor. However, for gas-solid reactions with a large number of thermal effects, multiple spiral tube reactors need to be set up. The existing spiral tube reactors have independent heat exchange in the spiral tubes and no coupling design, which affects the overall heat transfer efficiency of the reactor. Therefore, it is necessary to design a coupled multi-spiral tube reactor to improve the hydrogen storage and release performance. Summary of the Invention

[0005] In order to overcome the technical problems of uneven reaction heat and poor heat exchange capacity in existing reactors, the present invention discloses a spiral elbow thermal storage gas-solid phase reactor, which adopts a double helix and elbow coupling structure to enhance heat transfer, realize heat storage function, and improve hydrogen storage and release performance.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A spiral elbow heat storage gas-solid phase reactor comprises a reactor shell and an inner spiral reaction unit, an outer spiral reaction unit and an elbow connecting pipe respectively arranged in the reactor shell, wherein the inner spiral reaction unit and the outer spiral reaction unit both spiral upward from the bottom of the reactor shell in the axial direction of the reactor shell, the elbow connecting pipe is arranged in the radial direction of the reactor shell, the inner spiral reaction unit is connected with the outer spiral reaction unit via the elbow connecting pipe, a hydrogen inlet and a hydrogen outlet are respectively provided on the reactor shell; the hydrogen inlet is connected with the hydrogen outlet via the outer spiral reaction unit, the elbow connecting pipe and the inner spiral reaction unit in sequence, the reactor shell is further filled with a heat storage material, and the heat storage material is both located outside the inner spiral reaction unit and outside the outer spiral reaction unit.

[0008] Furthermore, the inner spiral reaction unit includes an inner spiral reaction tube and an inner spiral tube upper end panel and an inner spiral tube lower end panel respectively placed at both ends of the inner spiral reaction tube; the inner spiral tube lower end panel is located at the bottom of the reactor shell, and the inner spiral reaction tube spirals upward from the bottom of the reactor shell in the axial direction within the reactor shell. A gas phase mesh pipe is arranged in the inner spiral reaction tube along the axial direction of the inner spiral reaction tube, one end of the gas phase mesh pipe is in contact with the inner spiral tube lower end panel, and the other end of the gas phase mesh pipe passes through the inner spiral tube upper end panel and is connected to the hydrogen outlet; the hydrogen inlet is connected to the gas phase mesh pipe in the inner spiral reaction tube in sequence through the outer spiral reaction unit and the elbow connecting pipe; the heat storage material is located outside the inner spiral reaction tube.

[0009] Furthermore, the inner spiral reaction unit also includes a solid phase reaction material placed in the inner spiral reaction tube and located outside the gas phase mesh tube.

[0010] Furthermore, the outer spiral reaction unit includes an outer spiral reaction tube and an outer spiral tube upper end panel and an outer spiral tube lower end panel respectively placed at both ends of the outer spiral reaction tube; the outer spiral tube lower end panel is placed on the inner bottom of the reactor shell, and the outer spiral reaction tube spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell. A gas phase mesh pipe is arranged in the outer spiral reaction tube along the axial direction of the outer spiral reaction tube, one end of the gas phase mesh pipe is in contact with the outer spiral tube lower end panel, and the other end of the gas phase mesh pipe is connected to the hydrogen inlet through the outer spiral tube upper end panel; the gas phase mesh pipe in the outer spiral reaction tube is connected to the gas phase mesh pipe in the inner spiral reaction tube via a bent pipe connecting pipe, and the heat storage material is located outside the outer spiral reaction tube.

[0011] Furthermore, the outer spiral reaction unit also includes a solid phase reaction material placed in the outer spiral reaction tube and located outside the gas phase mesh tube.

[0012] Furthermore, there are one or more curved connecting pipes; the multiple curved connecting pipes are evenly distributed along the ascending direction of the outer spiral reaction tube.

[0013] Furthermore, the helix angle of the outer spiral reaction tube is 15° to 35°, the pitch is 5mm to 50mm, and the inner diameter of the outer spiral reaction tube is 1mm to 10mm.

[0014] Furthermore, the helix angle of the inner spiral reaction tube is 5° to 20°, and the pitch is 5mm to 50mm; the inner diameter of the inner spiral reaction tube is 1mm to 10mm.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention realizes the coupling of double spiral tubes by arranging a connecting elbow between the two spiral units, which has strong heat transfer capacity. The spiral tubes are arranged inside and outside the reactor to be heated evenly, the temperature difference of the bed is small, the thermal stress generated is small, and the heat exchange capacity in the reactor is improved.

[0017] 2. The reactor provided by the present invention has a heat storage material arranged inside the reactor, which can evenly store heat, achieve uniform phase change inside the reactor, and has good heat storage characteristics.

[0018] 3. The reactor provided by the present invention has a fast reaction speed. The inner spiral reaction tube and the outer spiral reaction tube are connected by a bend pipe, so that the reaction inside and outside the reactor is uniform, and a stable reaction state of the reactor can be quickly achieved.

[0019] 4. The inner spiral reaction tube of the present invention is connected to the hydrogen outlet, and the outer spiral reaction tube is connected to the hydrogen inlet. When inflating, gas is introduced through the hydrogen inlet connected to the outer spiral tube, and the gas reaches the inner spiral reaction tube through the connecting elbow. The reactor is filled with hydrogen from the outside to the inside. When deflating, the gas generated by the outer spiral reaction tube is released to the inner spiral reaction tube through the connecting elbow and discharged from the hydrogen outlet. The reactor degases hydrogen from the inside to the outside. The reactor realizes the separation of hydrogen absorption and degassing, and the hydrogen charging and degassing process can be switched through the interface, which is convenient and flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structural diagram of the reactor provided by the present invention;

[0021] Figure 2 Schematic diagram of concentric spiral bend;

[0022] Figure 3 It is a top view of the concentric spiral bend;

[0023] Figure 4 for Figure 1 A half-section diagram of

[0024] Figure 5 for Figure 2 A half-section diagram of

[0025] Figure 6 Schematic diagram of the hydrogen storage reactor model;

[0026] Figure 7 Schematic diagram of single helix, double helix, double helix and bent tube models;

[0027] Figure 8 is the reaction fraction of the three models;

[0028] Figure 9 is the bed temperature of the three model solid reaction materials;

[0029] Figure 10 is the temperature of the phase change materials of the three models;

[0030] in:

[0031] 1—Hydrogen inlet; 2—Hydrogen outlet; 3—Reactor upper cover; 4—Reactor side wall; 5—Reactor lower cover; 6—Inner spiral reaction tube; 7—Outer spiral reaction tube; 8—Bend connecting tube; 9—Upper end panel of outer spiral tube; 10—Upper end panel of inner spiral tube; 11—Heat storage material; 12—Solid phase reaction material; 13—Gas phase mesh pipe; 14—Lower end panel of outer spiral tube; 15—Lower end panel of inner spiral tube. DETAILED DESCRIPTION

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] See also Figure 1 A spiral elbow heat storage gas-solid phase reactor comprises a reactor shell and an inner spiral reaction unit, an outer spiral reaction unit and an elbow connecting pipe 8 respectively arranged in the reactor shell.

[0034] See also Figure 1 The reactor shell has a cylindrical cavity structure. Specifically, it includes a reactor sidewall plate 4, a reactor upper cover plate 3 positioned at the top of the reactor sidewall plate 4, and a reactor lower cover plate 5 positioned at the bottom of the reactor sidewall plate 4. The reactor sidewall plate 4 has a cylindrical structure. The reactor upper cover plate 3 is provided with a hydrogen inlet 1 and a hydrogen outlet 2.

[0035] See also Figures 2 to 5The inner spiral reaction unit is placed on the inner bottom surface of the reactor shell, that is, on the reactor lower cover plate 5 in the reactor shell, and spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell until it is close to the reactor upper cover plate 3, and the inner spiral reaction unit is connected with the hydrogen outlet 2; the outer spiral reaction unit is placed on the inner bottom surface of the reactor shell, that is, on the reactor lower cover plate 5 in the reactor shell, and spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell until it is close to the reactor upper cover plate 3, and the outer spiral reaction unit is connected with the hydrogen inlet 1; the inner spiral reaction unit and the outer spiral reaction unit are connected through an elbow connecting pipe 8, and the elbow connecting pipe 8 is placed in the radial direction of the reactor shell, and the reactor shell is also filled with heat storage material 11, and the heat storage material 11 is located outside the inner spiral reaction unit and outside the outer spiral reaction unit.

[0036] See also Figures 2 to 5 Specifically, the inner spiral reaction unit includes an inner spiral reaction tube 6 and an inner spiral tube upper end panel 10 and an inner spiral tube lower end panel 15 respectively arranged at both ends of the inner spiral reaction tube 6; the inner spiral tube lower end panel 15 is located at the bottom of the reactor shell, the inner spiral tube lower end panel 15 is located on the reactor lower cover plate 5, and the inner spiral tube upper end panel 10 is close to the reactor upper cover plate 3; the inner spiral reaction tube 6 spirals upward from the bottom of the reactor shell in the axial direction within the reactor shell, and a gas phase mesh pipe 13 is arranged in the inner spiral reaction tube 6 along the axial direction of the inner spiral reaction tube 6, one end of the gas phase mesh pipe 13 is in contact with the inner spiral tube lower end panel 15, and the other end of the gas phase mesh pipe 13 passes through the inner spiral tube upper end panel 10 and is connected with the hydrogen outlet 2; the gas phase mesh pipe 13 in the inner spiral reaction tube 6 is connected with the outer spiral reaction unit through a bend connecting pipe 8; the heat storage material 11 is located outside the inner spiral reaction tube 6.

[0037] The inner spiral reaction unit further includes a solid phase reaction material 12 placed in the inner spiral reaction tube 6 and located outside the gas phase mesh tube 13 .

[0038] See also Figures 2 to 5Specifically, the outer spiral reaction unit includes an outer spiral reaction tube 7 and an outer spiral tube upper end panel 9 and an outer spiral tube lower end panel 14 respectively placed at both ends of the outer spiral reaction tube 7; the outer spiral tube lower end panel 14 is placed on the bottom of the reactor shell, the outer spiral tube lower end panel 14 is located on the reactor lower cover plate 5, the outer spiral tube upper end panel 9 is close to the reactor upper cover plate 3, the outer spiral reaction tube 7 spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell, and a gas phase mesh pipe 13 is arranged in the outer spiral reaction tube 7 along the axial direction of the outer spiral reaction tube 7, one end of the gas phase mesh pipe 13 is in contact with the outer spiral tube lower end panel 14, and the other end of the gas phase mesh pipe 13 passes through the outer spiral tube upper end panel 9 and is connected with the hydrogen inlet 1; the gas phase mesh pipe 13 in the inner spiral reaction tube 6 is connected with the gas phase mesh pipe 13 in the outer spiral reaction tube 7 through the elbow connecting pipe 8, and the heat storage material 11 is located outside the outer spiral reaction tube 7.

[0039] The outer spiral reaction unit further includes a solid phase reaction material 12 placed in the outer spiral reaction tube 7 and located outside the gas phase mesh tube 13 .

[0040] There are one or more elbow connecting pipes 8, and the plurality of elbow connecting pipes 8 are evenly distributed along the ascending direction of the outer spiral reaction tube 7. In this embodiment, there are five elbow connecting pipes 8.

[0041] During implementation, the helix angle of the outer spiral reaction tube 7 is 15° to 35°, the pitch is 5 mm to 50 mm, and the inner diameter of the outer spiral reaction tube 7 is 1 mm to 10 mm.

[0042] During implementation, the helical angle of the inner spiral reaction tube 6 is 5° to 20°, the pitch is 5 mm to 50 mm, and the inner diameter of the inner spiral reaction tube 6 is 1 mm to 10 mm.

[0043] When the inner spiral reaction tube 6 and the outer spiral reaction tube 7 spiral upward along the central axis of the reactor shell, forming a concentric spiral structure.

[0044] The heat storage material 11 is a phase change material, including but not limited to sodium sulfate decahydrate, paraffin, etc. The solid phase reaction material 12 is a hydrogen storage material, including but not limited to magnesium nickel alloy, lanthanum nickel alloy, etc.

[0045] The spiral elbow heat storage gas-solid phase reactor provided by the present invention adopts an inner spiral reaction tube and an outer spiral reaction tube to form a concentric spiral tube, and is connected and coupled by an elbow connecting tube 8 to achieve double spiral tube coupling communication, thereby improving the heat exchange capacity in the reactor. During inflation, hydrogen enters the gas phase mesh pipe 13 in the outer spiral reaction tube 7 from the hydrogen inlet 1, and then enters the gas phase mesh pipe 13 in the inner spiral reaction tube 6 through the elbow connecting tube 8. Under the action of the solid phase reaction material 12 in the inner spiral reaction tube 6 and the outer spiral reaction tube 7, hydrogen undergoes phase change and is stored in the gas phase mesh pipe 13 in the inner spiral reaction tube 6 and the gas phase mesh pipe 13 in the outer spiral reaction tube 7; the heat storage material 11 absorbs the heat of the phase change and stores it. During degassing, under the action of the heat stored in the heat storage material 11, the solid hydrogen is released from the outer spiral reaction tube gas 7 through the elbow connecting tube 8 to the inner spiral reaction tube 6 in a gaseous state and is discharged from the hydrogen outlet 2.

[0046] In order to illustrate the heat storage and heat exchange performance of the spiral elbow thermal storage gas-solid phase reactor provided by the present invention, the following experimental verification was carried out.

[0047] Experimental group: The spiral elbow regenerative gas-solid phase reactor provided by the present invention has a double spiral tube + elbow structure.

[0048] During the experiment, the shell of the gas-solid phase reactor is a cylindrical container with a radius of 50mm and a height of 25mm. Inside it are two spiral pipes, which are connected by elbows. A hydrogen pipe with a diameter of 2mm is passed into each spiral pipe. The interior of the cylinder is filled with phase change material, and the interior of the spiral pipe and the elbow is solid-phase reaction material. The model diagram of the experimental group reactor is shown in the figure. Figure 6 As shown, (a) is an overall schematic diagram; (b) is a top view schematic diagram; and (c) is a top view internal structure diagram.

[0049] At the same time, the following two comparison groups were set up.

[0050] Comparative group 1: a single spiral tube is provided in the reactor shell, that is, it does not contain an inner spiral unit and an elbow connecting tube 8 .

[0051] Comparative Group 2: A double helical tube is installed in the reactor shell, and both of the double helical tubes spiral upward along the central axis of the reactor shell, that is, no elbow connecting tube 8 is included.

[0052] In both the control group and the experimental group, the heat storage material 11 was sodium sulfate decahydrate, and the solid phase reaction material 12 was lanthanum nickel alloy.

[0053] The volumes of the inner spiral reaction tube 6 , the outer spiral reaction tube 7 and the gas phase mesh tube 13 can be calculated with reference to the following formula.

[0054]

[0055] Where: r ais the radius of the corresponding spiral tube; b is the pitch of the corresponding spiral tube; r c is the spiral radius; h is the height of the corresponding spiral tube.

[0056] The reactor structure affects the contact area and heat transfer between the hydrogen storage material and the phase change material. This paper discusses the effects of three different reactor structures on the hydrogen storage reactor when other parameters remain unchanged.

[0057] See also Figure 7 , three reactor structures, among which (a1), (b1) and (c1) are schematic diagrams of the reactor models of comparison group 1 (single spiral tube reactor), comparison group 2 (double spiral reactor) and experimental group (spiral tube + elbow reactor), respectively; (a2), (b2) and (c2) are top views corresponding to (a1), (b1) and (c1), respectively.

[0058] from Figure 7 It can be seen that the total volume of the reactor is fixed, and the size and number of the spiral pipes are limited. Under this condition, the present invention increases the additional contact area by designing the elbow connecting pipe 8.

[0059] The hydrogen absorption and desorption processes of the experimental group and two control groups were simulated, and the reaction fraction, bed temperature at different reaction times, and phase change material layer temperature were calculated. The results are as follows: Figures 8 to 10 shown.

[0060] like Figure 8 As shown in the reaction fraction diagram of the hydrogen absorption process, the reaction efficiency of the single helix model is significantly lower than that of the other two models. When the reaction fraction reaches 63.2%, the reaction time of the single helix model is 240s, the reaction time of the double helix model is 184s, and the reaction time of the double helix and elbow model is 174s.

[0061] Comparison shows that the hydrogen absorption time of the double helix and curved tube coupled model provided by the present invention is 27.5% faster than that of the existing single helix model and 5.43% faster than that of the existing double helix model. When the hydrogen absorption reaction reaches 99.3%, the hydrogen absorption time required by the double helix and curved tube provided by the present invention is shorter than that of the other two comparison models, indicating that the spiral curved tube regenerative gas-solid phase reactor provided by the present invention has a fast hydrogen absorption rate.

[0062] See also Figure 9 Each set of images shows the bed temperature at 500s, 750s, 1000s, 1250s, and 1500s, respectively. This comparison demonstrates that the spirally bent regenerative gas-solid reactor provided by the present invention effectively removes unheated air from the bed, resulting in a more uniform temperature within the reactor and a lower average temperature, enabling a rapid return to steady-state reaction.

[0063] See also Figure 10 , the temperature comparison of the phase change material layer. Since heat is quickly transferred from the solid material layer to the phase change material layer during the reaction, the phase change material absorbs the heat released by the hydrogen storage reaction and undergoes phase change. The spiral bend thermal storage gas-solid phase reactor provided by the present invention has the highest temperature of the phase change material layer, indicating that this type of reactor has a faster heat transfer rate than the other two models of reactors.

[0064] As the reaction proceeds, heat is gradually stored in the form of latent heat by the phase change material, and the regional temperature gradually decreases. Near the end of the reaction, the phase change material temperature of the spiral bend thermal storage gas-solid phase reactor provided by the present invention is lower than the phase change material temperature of the other two comparative model reactors, indicating that the spiral bend thermal storage gas-solid phase reactor provided by the present invention, its phase change material maximizes the storage of heat in the form of latent heat, and very little is stored in the form of sensible heat, and the phase change material utilization rate is the highest. The temperatures of the other two types of phase change materials are higher, indicating that part of the heat is still stored in the form of sensible heat at this time, so part of the phase change material has not yet undergone phase change heat storage.

[0065] In summary, the spiral bend thermal storage gas-solid phase reactor provided by the present invention has the highest effective utilization rate of the phase change material in the reactor, the fastest heat transfer rate, and the best heat transfer performance during the hydrogen absorption reaction, so the solid material reaction rate is the fastest.

Claims

1. A spiral bend regenerative gas-solid phase reactor, characterized in that: The invention comprises a reactor shell and an inner spiral reaction unit, an outer spiral reaction unit and an elbow connecting pipe (8) respectively arranged in the reactor shell, wherein the inner spiral reaction unit and the outer spiral reaction unit are both spiraled upward from the bottom of the reactor shell in the axial direction of the reactor shell, the elbow connecting pipe (8) is arranged in the radial direction of the reactor shell, and the inner spiral reaction unit is connected with the outer spiral reaction unit through the elbow connecting pipe (8); a hydrogen inlet (1) and a hydrogen outlet (2) are respectively arranged on the reactor shell; the hydrogen inlet (1) is connected with the hydrogen outlet (2) in sequence through the outer spiral reaction unit, the elbow connecting pipe (8) and the inner spiral reaction unit; the reactor shell is further filled with a heat storage material (11), and the heat storage material (11) is both located outside the inner spiral reaction unit and outside the outer spiral reaction unit; the spiral elbow heat storage gas-solid phase reactor is used for hydrogen storage-solid phase reaction of metal hydride; There are multiple curved connecting pipes (8); the multiple curved connecting pipes (8) are evenly distributed along the ascending direction of the outer spiral reaction tube (7).

2. The spiral bend thermal storage gas-solid phase reactor according to claim 1, characterized in that: The inner spiral reaction unit comprises an inner spiral reaction tube (6) and an inner spiral tube upper end panel (10) and an inner spiral tube lower end panel (15) respectively arranged at both ends of the inner spiral reaction tube (6); the inner spiral tube lower end panel (15) is located at the bottom of the reactor shell, the inner spiral reaction tube (6) spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell, a gas phase mesh pipe (13) is arranged in the inner spiral reaction tube (6) along the axial direction of the inner spiral reaction tube (6), one end of the gas phase mesh pipe (13) contacts the inner spiral tube lower end panel (15), and the other end of the gas phase mesh pipe (13) passes through the inner spiral tube upper end panel (10) and is connected to the hydrogen outlet (2); the hydrogen inlet (1) is connected to the gas phase mesh pipe (13) in the inner spiral reaction tube (6) in sequence through the outer spiral reaction unit and the elbow connecting pipe (8); the heat storage material (11) is located outside the inner spiral reaction tube (6).

3. The spiral bend thermal storage gas-solid phase reactor according to claim 2, characterized in that: The inner spiral reaction unit further includes a solid phase reaction material (12) placed in the inner spiral reaction tube (6) and located outside the gas phase mesh tube (13).

4. The spiral bend thermal storage gas-solid phase reactor according to claim 3, characterized in that: The outer spiral reaction unit comprises an outer spiral reaction tube (7) and an outer spiral tube upper end panel (9) and an outer spiral tube lower end panel (14) respectively placed at both ends of the outer spiral reaction tube (7); the outer spiral tube lower end panel (14) is placed on the bottom of the reactor shell, the outer spiral reaction tube (7) spirals upward from the bottom of the reactor shell in the axial direction of the reactor shell, a gas phase mesh pipe (13) is arranged in the outer spiral reaction tube (7) along the axial direction of the outer spiral reaction tube (7), one end of the gas phase mesh pipe (13) contacts the outer spiral tube lower end panel (14), and the other end of the gas phase mesh pipe (13) passes through the outer spiral tube upper end panel (9) and is connected to the hydrogen inlet (1); the gas phase mesh pipe (13) in the outer spiral reaction tube (7) is connected to the gas phase mesh pipe (13) in the inner spiral reaction tube (6) via the elbow connecting pipe (8), and the heat storage material (11) is located outside the outer spiral reaction tube (7).

5. The spiral bend thermal storage gas-solid phase reactor according to claim 4, characterized in that: The outer spiral reaction unit further includes a solid phase reaction material (12) placed in the outer spiral reaction tube (7) and located outside the gas phase mesh tube (13).

6. The spiral bend thermal storage gas-solid phase reactor according to claim 5, characterized in that: The outer spiral reaction tube (7) has a spiral angle of 15° to 35°, a pitch of 5 mm to 50 mm, and an inner diameter of 1 mm to 10 mm.

7. The spiral bend thermal storage gas-solid phase reactor according to claim 6, characterized in that: The helical angle of the inner spiral reaction tube (6) is 5° to 20°, and the pitch is 5 mm to 50 mm; the inner diameter of the inner spiral reaction tube (6) is 1 mm to 10 mm.

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