Hydrogen deoxidizer and hydrogen purification system for water electrolysis hydrogen production

Abstract

The application discloses a hydrogen deoxidizer for water electrolysis hydrogen production and a hydrogen purification system, and belongs to the field of equipment used in electrolysis process for producing non-metals. The application firstly provides a hydrogen deoxidizer, which is provided with a feeding opening and a discharging opening on the side of an outer cylinder. A material supporting body capable of moving up and down is arranged in the inner part of the outer cylinder and around an inner cylinder. A space above the material supporting body is a filler space for loading a catalyst. When the filler is needed, the material supporting body is moved upwards to be higher than the discharging opening. When the discharging is needed, the material supporting body is moved downwards to make the discharging opening communicate with the filler space above the material supporting body. The deoxidizer is convenient for replacing the catalyst, and solves the technical problem that the existing deoxidizer is difficult to operate in replacing the catalyst. In addition, the deoxidizer is combined with three drying towers to form a set of hydrogen purification system, and can be used for hydrogen purification.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of equipment for non-metal electrolysis process, in particular to a hydrogen deoxidizer and hydrogen purification system for water electrolysis hydrogen production. BACKGROUND

[0002] Water electrolysis hydrogen production is a relatively convenient method for producing hydrogen. In the electrolytic cell filled with electrolyte, direct current is passed in, and water molecules on the electrode undergo electrochemical reaction to decompose into hydrogen and oxygen. It is not difficult to see from the principle that the hydrogen produced by electrolysis usually contains a small amount of oxygen and gaseous water. As a chemical raw material and energy carrier, the purity and impurity content of hydrogen have different requirements for different application scenarios. Therefore, hydrogen purification is an essential part of the water electrolysis hydrogen production process.

[0003] In the prior art, the purification system for water electrolysis hydrogen production is a device for deep processing of hydrogen produced in the hydrogen production process, and its core components include a catalytic deoxidizer and an adsorption dehydration drying tower. The core task of the catalytic deoxidizer is to remove impurity oxygen in hydrogen. In the deoxidation process of electrolytic hydrogen, the commonly used catalyst is palladium, which can effectively promote the reaction between hydrogen and oxygen due to its high activity and excellent selectivity. To ensure the stable speed of the catalytic reaction, the deoxidizer usually adopts internal heating. This heating method increases the temperature of the entire system, providing the necessary kinetic energy for hydrogen and oxygen molecules, thereby accelerating their chemical reaction on the surface of the palladium catalyst. The product of this reaction is water, which is then separated and treated. After this series of process flows, the oxygen content in the hydrogen will be significantly reduced.

[0004] Figure 2 The structure of a common deoxidizer in the prior art is shown. The deoxidizer is an inner and outer cylinder structure, the catalyst is filled between the outer cylinder and the inner cylinder, and the explosion-proof electric heating assembly is installed in the inner cylinder. The raw hydrogen gas enters the inner cylinder from the upper end inlet of the deoxidizer, is heated by the electric heating element, and flows through the catalyst bed layer from bottom to top. The oxygen in the raw hydrogen gas reacts with hydrogen to form water under the action of the catalyst, and the oxygen content in the hydrogen gas flowing out of the outlet can be reduced to below 1 ppm. The water generated by the reaction is in gaseous form and flows out of the deoxidizer with the hydrogen gas. In the subsequent cooler, the water is condensed, filtered in the gas-water separator, and discharged from the system.

[0005] In the prior art, the catalyst (usually palladium, platinum, etc. supported on an alumina carrier) in the deoxidizer promotes the reaction of trace oxygen in hydrogen with hydrogen to generate water. In actual operation, the catalyst will gradually lose activity or performance due to various reasons. Catalyst deactivation or performance degradation directly affects the deoxidation effect and requires regular replacement of the catalyst. The above-mentioned existing deoxidizer has the technical problem of difficult catalyst replacement operation. SUMMARY

[0006] The application aims to provide a hydrogen deoxidizer and a hydrogen purification system for water electrolysis hydrogen production.

[0007] The technical scheme adopted by the application is as follows: in a first aspect, the application provides a hydrogen deoxidizer for water electrolysis hydrogen production, which comprises an outer cylinder and an inner cylinder, the inner cylinder is arranged in the outer cylinder in a nested mode; a gas discharge pipe is arranged on the upper part of the side surface of the outer cylinder, the top end of the inner cylinder is closed and extends beyond the top end of the outer cylinder, a gas inlet pipe is arranged on the part of the inner cylinder extending beyond the top end of the outer cylinder; the bottom end opening of the inner cylinder in the outer cylinder is communicated with the inner part of the outer cylinder; an anti-explosion electric heating assembly is arranged in the inner cylinder; a feeding opening and a discharging opening are arranged on the side surface of the outer cylinder, the feeding opening is arranged on the upper part of the side surface of the outer cylinder; the discharging opening is arranged on the lower part of the side surface of the outer cylinder and is higher than the bottom end opening of the inner cylinder; a material support capable of moving up and down is arranged in the inner part of the outer cylinder and surrounds the inner cylinder, air holes are arranged on the material support; a space above the material support is a filling space, which is used for loading catalysts; a lifting driving device is arranged at the bottom of the outer cylinder; the material support is connected with the lifting driving device through a support frame, the material support can be driven to move up and down along the inner cylinder through the lifting driving device; when filling is needed, the material support is moved upward to extend beyond the discharging opening; when discharging is needed, the material support is moved downward to make the discharging opening communicated with the filling space above the material support.

[0008] In a second aspect, the application provides a hydrogen purification system, which comprises the above deoxidizer and three drying towers, the drying towers are inner-outer cylinder structures and comprise outer cylinders and inner cylinders; the inner cylinders are arranged in the outer cylinders in a nested mode; the inner part of the outer cylinder is a closed chamber, a gas discharge pipe is arranged on the side surface of the outer cylinder; the inner cylinder penetrates into the inner part of the outer cylinder from the top end of the outer cylinder; the top end of the inner cylinder is closed and extends beyond the top part of the outer cylinder, a gas inlet pipe is arranged on the part of the inner cylinder extending beyond the top part of the outer cylinder; the bottom end opening of the inner cylinder is communicated with the inner part of the outer cylinder; an anti-explosion electric heating assembly is arranged in the inner cylinder; the bottom of the outer cylinder is closed by a lower end cover, a material support with fixed position is arranged in the inner part of the outer cylinder and surrounds the inner cylinder, air holes are arranged on the material support, a space above the material support is a filling space, which is used for loading molecular sieves; hydrogen first passes through the deoxidizer, oxygen in the hydrogen reacts with hydrogen to generate water under the action of the catalyst; then, the gas passes through a deoxidizing cooler to condense gaseous water in the gas into liquid water, and then enters a first gas-water separator for gas-water separation; then, the gas enters the drying towers for drying; the three drying towers are periodically and alternately used for work and regeneration.

[0009] The beneficial effects of the present application are that the present application first provides a hydrogen deoxidizer for hydrogen production by water electrolysis, and the deoxidizer provided by the present application is provided with a feeding opening and a discharging opening on the side surface of the outer cylinder; a material supporting body capable of moving up and down is arranged around the inner cylinder inside the outer cylinder, and the material supporting body is provided with a ventilation hole; the space above the material supporting body is a filling space, and the filling space is used for loading catalysts; the bottom of the outer cylinder is provided with a lifting driving device; the material supporting body is connected with the lifting driving device through a supporting frame, and the material supporting body can be driven to move up and down along the inner cylinder through the lifting driving device; when filling is needed, the material supporting body moves upwards to exceed the discharging opening; when discharging is needed, the material supporting body moves downwards to make the discharging opening communicate with the filling space above the material supporting body; the deoxidizer is convenient for replacing catalysts, and solves the technical problem that the existing deoxidizer is difficult to operate in replacing catalysts. In addition, the deoxidizer is combined with three drying towers to form a set of hydrogen purification system, which can be used for hydrogen purification. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 The process flow chart before hydrogen produced by the electrolytic cell in the prior art is shown to the purification equipment.

[0011] Figure 2 The structural schematic diagram of a common deoxidizer in the prior art is shown.

[0012] Figure 3 The three-dimensional structure display diagram of the deoxidizer provided by the present application is shown.

[0013] Figure 4 The side sectional view of the deoxidizer in the present application is shown. Figure 3

[0014] Figure 5 The internal structure display diagram of the deoxidizer in the present application is shown. Figure 3

[0015] Figure 6 The schematic diagram of the material supporting body located above the discharging opening when loading catalysts is shown.

[0016] Figure 7 The schematic diagram of the material supporting body moving downwards into the discharging opening is shown.

[0017] Figure 8 The three-dimensional structure display diagram of the discharging opening in the present application is shown.

[0018] Figure 9 The structure display diagram of the deoxidizer which can be assembled in the present application is shown.

[0019] Figure 10 The perspective view of the outer cylinder in the present application is shown.

[0020] ​​Figure 11 Fig. 1 shows a structural view of the first sealing cover of the present application.

[0021] Figure 12 Fig. 2 shows a structural view of the inner cylinder assembly of the present application.

[0022] Figure 13 Fig. 3 shows a perspective view of the internal structure of the inner cylinder assembly of the present application.

[0023] Figure 14 Fig. 4 shows a view of the downward spiral channel provided inside the inner cylinder body of the present application.

[0024] Figure 15 Fig. 5 shows a view of the second mounting mode of the diffusion plate of the present application.

[0025] Figure 16 Fig. 6 shows a sectional view of the base of the present application.

[0026] Figure 17 Fig. 7 shows an exploded view of the internal structure of the base of the present application.

[0027] Figure 18 Fig. 8 shows a view of the circular ring plate-shaped material support body of the present application provided with a ring of downward extending cover portions at the edge thereof.

[0028] Figure 19 Fig. 9 shows a view of the cover portions of the present application covering the discharge port.

[0029] Figure 20 Fig. 10 shows a view of the cover portions of the present application descending to expose the discharge port.

[0030] Figure 21 Fig. 11 shows a view of the upper surface of the material support body of the present application improved to be inclined.

[0031] Figure 22 Fig. 12 shows a view of the second material support body provided by the present application Figure 1 .

[0032] Figure 23 Fig. 13 shows a view of the second material support body provided by the present application Figure 2 .

[0033] Figure 24 Fig. 14 shows a view of a long diffusion tube of the present application.

[0034] Figure 25 Fig. 15 shows a structural view of the first vibration drive provided by the present application.

[0035] Figure 26 Fig. 16 shows a structural view of the second vibration drive provided by the present application.

[0036] Figure 27A schematic diagram of a hydrogen purification system is shown.

[0037] Figure 28 A structural display diagram of a drying tower is shown.

[0038] Figure 29 A perspective structural display diagram of a skid-mounted hydrogen purification system is shown.

[0039] Explanation of reference signs: outer cylinder 1, gas discharge pipe 101, charging port 102, discharging port 103, filler space 104, first flange connection part 105, first sealing cover 106, first support part 107, first connection part 108, first threaded rod 109, rectangular sealing cover 110, second support part 111, second connection part 112, second threaded rod 113, material guide plate 114, mounting pipe 115, sealing end cover 116; inner cylinder 2, gas inlet pipe 201, second flange connection part 202; explosion-proof electric heating assembly 3, temperature sensor 4, material support 5, covering part 501, mounting through hole 502, diffusion pipe 503, elastic rubber ring 504; lifting driving device 6, support frame 7, cross support plate 701, support rod 702; base 8, fourth flange connection part 801, bottom sealing cover 802, sealing cover support 803, inner sealing cover 804; outer cylinder flange connection cover 9, explosion-proof box 10, third flange connection part 1001, flow equalizing plate 11, spiral body 12, spiral channel 1201; diffusion plate 13, voice coil motor 14, moving part 1401, lower end cover 15; electrolytic cell A1, first hydrogen separator A2, first hydrogen scrubber A3, first hydrogen cooler A4, first hydrogen drop catcher A5; deoxidizer B, deoxidizing cooler C, first drying tower D1, second drying tower D2, third drying tower D3; first drying cooler E1, second drying cooler E2, third drying cooler E3; first gas-water separator F1, second gas-water separator F2, third gas-water separator F3, fourth gas-water separator F4. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Referring to Figure 1 The process flow chart shown is the process flow chart of the prior art electrolytic cell A1 generating hydrogen gas to the purification equipment. As shown in the figure, in the electrolytic cell A1, water generates hydrogen gas and oxygen gas under the action of direct current; wherein, the hydrogen gas and the electrolyte enter the first hydrogen gas separator A2 in the auxiliary equipment frame under the action of the hydrogen alkaline solution circulating pump and the gas lifting force, and the gas-liquid separation is carried out under the action of gravity, the separated hydrogen gas removes the alkali steam entrained in the gas through the first hydrogen gas scrubber A3, and then the gas is cooled to below 35℃ through the first hydrogen gas cooler A4, and then the free water is removed through the first hydrogen gas drip catcher A5; after that, the gas is raised to the rated pressure (or given pressure) under the action of the membrane regulating valve, and then sent to the purification equipment for purification.

[0045] The deoxidizer is the first process equipment in the purification equipment. As Figure 2The structure of a common deoxidizer in the prior art is shown. The deoxidizer shown in the figure is an inner and outer cylinder structure, including an outer cylinder body 1 and an inner cylinder body 2; the inner cylinder body 2 is nested in the inner part of the outer cylinder body 1. Specifically, the inner part of the outer cylinder body 1 is a closed chamber, and a gas discharge pipe 101 is arranged on the side of the outer cylinder body 1. The inner cylinder body 2 penetrates into the inner part of the outer cylinder body 1 from the top end of the outer cylinder body 1; the top end of the inner cylinder body 2 is closed and protrudes from the top of the outer cylinder body 1, and a gas inlet pipe 201 is arranged on the part of the inner cylinder body 2 protruding from the top of the outer cylinder body 1. The bottom of the inner cylinder body 2 is open and communicates with the inner part of the outer cylinder body 1. A filler space is formed between the inner cylinder body 2 and the outer cylinder body 1, and a catalyst for deoxidation is filled in the filler space. In addition, an explosion-proof electric heating assembly 3 is arranged in the inner part of the inner cylinder body 2; two temperature sensors 4 are arranged at the top and bottom of the catalyst filler respectively, for detecting and controlling the reaction temperature.

[0046] The working principle of the above deoxidizer is as follows: raw hydrogen gas enters the inner cylinder body 2 from the gas inlet pipe 201 at the upper end of the deoxidizer, is heated by the explosion-proof electric heating assembly 3, and then diffuses into the catalyst from the bottom opening of the inner cylinder body 2; during the process of flowing through the catalyst bed from bottom to top, a small amount of oxygen in the hydrogen gas can react with the hydrogen gas to generate gaseous water, and the reacted hydrogen gas and gaseous water are discharged from the gas discharge pipe 101 of the deoxidizer; then enter the deoxidizing cooler C to condense the gaseous water in the gas into liquid water, and then enter the first gas-water separator F1 for gas-water separation; and then enter the drying device for drying.

[0047] In the prior art, the catalyst (usually a noble metal such as palladium or platinum supported on an alumina carrier) in the deoxidizer promotes the reaction of a small amount of oxygen in the hydrogen gas with the hydrogen gas to generate water. In actual operation, the catalyst will gradually lose activity or performance due to various reasons.

[0048] Firstly, physical blockage and pollution (main reason): water vapor poisoning: the hydrogen gas coming out of the electrolytic tank A1 is high-temperature saturated water vapor. Although there is usually a cooler and a gas-water separator before the deoxidizer, the gas may still carry fine water droplets or be in a high humidity state. These water will condense and soak the catalyst carrier, covering the active sites and causing the reaction efficiency to decrease. Long-term water vapor soaking may also cause the structural strength of the catalyst carrier (such as alumina) to decrease or even powder.

[0049] Secondly, impurity pollution: the raw material for electrolytic water is deionized water, which has very high purity, but there may still be a trace amount of impurities (such as metal ions) that may be brought into the purification system with the hydrogen gas. These impurities will be adsorbed on the surface of the catalyst, causing it to be "poisoned" and lose activity.

[0050] Third, sintering of active components: Deoxidation is an exothermic reaction that generates localized high temperatures. Although the system has temperature control, prolonged exposure to high temperatures may cause precious metal particles to migrate, aggregate, and grow (sinter), resulting in a reduction in the total active surface area and decreased catalytic activity.

[0051] Catalyst deactivation or performance degradation directly affects deoxygenation efficiency, necessitating periodic catalyst replacement. The existing deoxygenators described above present technical challenges due to the difficulty of catalyst replacement operations.

[0052] To address the aforementioned problems, this application first provides a hydrogen deoxygenator for hydrogen production via water electrolysis. See also... Figure 3 The image shown is a three-dimensional structural diagram of a deaerator B provided in this application. Figure 4 What is shown is Figure 3 Side sectional view of deaerator B. Figure 5 What is shown is Figure 3 A diagram showing the internal structure of deaerator B.

[0053] like Figures 3 to 5 As shown, the deaerator B includes a cylindrical outer cylinder 1 and a cylindrical inner cylinder 2; the inner cylinder 2 is nested inside the outer cylinder 1. Specifically, the top and bottom of the outer cylinder 1 are closed, and the interior of the outer cylinder 1 is a closed chamber. A gas exhaust pipe 101 is provided on the upper side of the outer cylinder 1. The cylindrical inner cylinder 2 is inserted into the interior of the outer cylinder 1 from the top. Preferably, the inner cylinder 2 is coaxially arranged with the outer cylinder 1. The top of the inner cylinder 2 is closed and extends beyond the top of the outer cylinder 1, and a gas inlet pipe 201 is provided on the portion of the inner cylinder 2 extending beyond the top of the outer cylinder 1; the bottom opening of the inner cylinder 2 inside the outer cylinder 1 communicates with the interior of the outer cylinder 1. An explosion-proof electric heating assembly 3 is provided inside the inner cylinder 2.

[0054] like Figure 4 , Figure 5 As shown, to facilitate catalyst replacement, in this embodiment of the application, a feed port 102 and a discharge port 103 are provided on the side of the outer cylinder 1. The feed port 102 is located on the upper part of the side of the outer cylinder 1, and the discharge port 103 is located on the lower part of the side of the outer cylinder 1, and the discharge port 103 is higher than the bottom opening of the inner cylinder 2. The feed port 102 and the discharge port 103 are sealed with an openable sealing cap.

[0055] Figure 5 In the illustrated embodiment, the feed port 102 is an upwardly curved circular tube with a circular opening at its end, and a circular sealing cap is provided on the circular opening. The discharge port 103 is a discharge channel formed by four sides; as shown... Figure 5 As shown, the four faces constituting the discharge port 103 extend from the notch on the outer cylinder 1 away from the outer cylinder 1, forming a rectangular opening at the end. The rectangular opening is positioned diagonally downwards, and a rectangular sealing cap 110 is provided on the rectangular opening.Figure 8 Figure 6 shows a perspective view of the discharge port 103 in the embodiment of the present application. As shown in Figure 6, the upper and lower faces of the discharge port 103 extend outwardly away from each other, wherein the upper face of the discharge port 103 is inclined upwardly and the lower face of the discharge port 103 is inclined downwardly; the height of the internal passage of the discharge port 103 gradually increases outwardly from the notch on the outer cylinder 1. Figure 6 As shown in Figure 6, the upper and lower faces of the discharge port 103 extend outwardly away from each other, wherein the upper face of the discharge port 103 is inclined upwardly and the lower face of the discharge port 103 is inclined downwardly; the height of the internal passage of the discharge port 103 gradually increases outwardly from the notch on the outer cylinder 1. Figure 8 As shown in Figure 6, the left and right faces of the discharge port 103 gradually approach each other during the outward extension from the notch on the outer cylinder 1. The long and flat notch on the outer cylinder 1 is converted into a rectangular opening with the end directed obliquely downward through the four faces of the discharge port 103, facilitating the setting of a sealing cover. This discharge passage also facilitates the smooth discharge of the material. Figure 8 As shown in Figure 6, the width of the long and flat notch on the outer cylinder 1 is less than half the circumference of the outer cylinder 1 and greater than one fourth of the circumference of the outer cylinder 1.

[0056] As shown in Figure 6, the long and flat notch on the outer cylinder 1 is less than half the circumference of the outer cylinder 1 and greater than one fourth of the circumference of the outer cylinder 1. Figure 5 As shown in Figure 6, the long and flat notch on the outer cylinder 1 is less than half the circumference of the outer cylinder 1 and greater than one fourth of the circumference of the outer cylinder 1. As shown in Figure 6, the long and flat notch on the outer cylinder 1 is less than half the circumference of the outer cylinder 1 and greater than one fourth of the circumference of the outer cylinder 1.

[0057] The bottom of the outer cylinder 1 is provided with a lifting drive device 6. The material support body 5 is connected to the lifting drive device 6 through a support frame 7, and the material support body 5 can be driven to move up and down along the inner cylinder 2 by the lifting drive device 6. When filling is required, the material support body 5 moves upwardly beyond the discharge port 103, at which time the discharge port 103 is located below the material support body 5, and the material support body 5 separates the filling space 104 above it from the discharge port 103, at which time the catalyst is filled and the catalyst will not enter the discharge port 103. Figure 6 Figure 7 shows a schematic view of the material support body 5 located above the discharge port 103 when filling the catalyst.

[0058] When it is needed to discharge the material, the material support 5 moves downwardly into the discharge port 103, so that the discharge port 103 communicates with the filling space 104 above the material support 5, and the catalyst in the filling space 104 can enter the discharge port 103, and the discharge can be carried out by opening the sealing cover on the discharge port 103. Figure 7 Fig. 3 shows a schematic diagram of the material support 5 moving downwardly into the discharge port 103. At this time, the upper surface of the material support 5 is higher than the lower edge of the notch on the outer cylinder 1, or is flush with the lower edge of the notch on the outer cylinder 1. The upper surface of the material support 5 cannot be lower than the lower edge of the discharge port 103, otherwise the material is not easy to discharge.

[0059] The above deoxidizer B provided by the present application is convenient to replace the catalyst, and solves the technical problem of difficult operation in replacing the catalyst of the existing deoxidizer B.

[0060] Further, the present application also provides an assemblable deoxidizer B. As shown in Figure 9 Fig. 5 shows a structural display diagram of an assemblable deoxidizer B according to the present application. The assemblable deoxidizer B comprises an outer cylinder 1, an inner cylinder assembly, and a base 8. As shown in Figure 10 Fig. 6 shows a perspective view of the outer cylinder 1 in the embodiment of the present application. The outer cylinder 1 is in a cylindrical shape, and the upper opening and the lower opening of the outer cylinder 1 are provided with annular first flange connecting portions 105. The upper part of the side surface of the outer cylinder 1 is provided with a filling port 102 and a gas discharge pipe 101, Figure 10 Fig. 6 shows that the gas discharge pipe 101 is higher than the filling port 102, and the gas discharge pipe 101 is staggered with the filling port 102 in position, so as to avoid the catalyst entering the gas discharge pipe 101 to cause blockage when filling. The lower part of the side surface of the outer cylinder 1 is provided with a discharge port 103. The filling port 102 and the discharge port 103 are closed by openable sealing covers.

[0061] Figure 10 Fig. 7 shows that in the embodiment, the filling port 102 is an upwardly curved circular pipe, the end of the circular pipe forms a circular opening, and a circular first sealing cover 106 is arranged on the circular opening. As shown in Figure 11The first sealing cover 106 is shown in the structure display diagram. As shown in the figure, the left side of the first sealing cover 106 is hinged with the charging port 102, and the right side of the first sealing cover 106 is provided with a locking structure; specifically, the first sealing cover 106 extends out the first supporting part 107 on the right side, and the circular opening edge of the charging port 102 extends out the first connecting part 108 opposite to the first supporting part 107; the first supporting part 107 and the first connecting part 108 are provided with threaded through holes in communication; the first threaded rod 109 is used to pass through the threaded through holes on the first supporting part 107 and the first connecting part 108 to connect the right side of the first sealing cover 106 to the first connecting part 108. The first threaded rod 109 is screwed with the threaded through hole. The contact surface of the first sealing cover 106 with the circular opening of the charging port 102 is provided with an annular sealing ring, and the first sealing cover 106 is locked, and the sealing is performed through the sealing ring. When charging, the first threaded rod 109 is rotated to exit the first connecting part 108, and then the first sealing cover 106 is turned to the left side to expose the circular opening for charging.

[0062] As shown in the figure, Figure 8 In a specific embodiment of the present application, the discharge port 103 is a discharge channel enclosed by four surfaces; a rectangular opening is formed at the end, the rectangular opening is arranged obliquely downward, and a rectangular sealing cover 110 is arranged on the rectangular opening. As shown in the figure, Figure 8 The right side of the rectangular sealing cover 110 is hinged with the rectangular opening, the left side of the rectangular sealing cover 110 extends out the second supporting part 111, and the edge of the rectangular opening extends out the second connecting part 112 opposite to the second supporting part 111; the second supporting part 111 and the second connecting part 112 are provided with threaded through holes in communication; the second threaded rod 113 is used to pass through the threaded through holes on the second supporting part 111 and the second connecting part 112 to connect the left side of the rectangular sealing cover 110 to the second connecting part 112. The second threaded rod 113 is screwed with the threaded through hole. The contact surface of the rectangular sealing cover 110 with the rectangular opening is provided with an annular sealing ring, and the rectangular sealing cover 110 is locked, and the sealing is performed through the sealing ring. When discharging, the second threaded rod 113 is rotated to exit the second connecting part 112, and then the rectangular sealing cover 110 is turned to the right side to expose the rectangular opening for discharging.

[0063] Further, as shown in the figure, Figure 10 In a specific embodiment of the present application, a conical guide plate 114 can also be arranged inside the outer cylinder 1, and the guide plate 114 is arranged below the charging port 102. The guide plate 114 extends downward and inward, and a circular notch is formed in the center of the guide plate 114. As shown in the figure, Figure 5 In the assembled deoxidizer B, the inner cylinder 2 passes through the circular notch in the center of the guide plate 114, and a gap is left between the edge of the circular notch and the outer wall of the inner cylinder 2, which allows the material to pass and fall into the space below.

[0064] Further, as shown in Figure 10 In one embodiment of the present application, two mounting pipes 115 for mounting temperature sensor 4 are further provided on the side wall of outer cylinder 1. One of the mounting pipes 115 is provided on the upper part of the side wall of outer cylinder 1 at the same height as the gas discharge pipe 101. The other mounting pipe 115 is provided on the lower part of the side wall of outer cylinder 1 at a lower height than the discharge port 103. The outer side opening end of the mounting pipe 115 is mounted with a circular sealing end cover 116, and the temperature sensor 4 is mounted on the sealing end cover 116, with the temperature sensor 4 extending into the interior of outer cylinder 1.

[0065] As shown in Figure 12 The structure of the inner cylinder assembly of the present application is shown. Figure 13 The internal structure perspective view of the inner cylinder assembly of the present application is shown. The inner cylinder assembly includes inner cylinder 2, outer cylinder flange connection cover 9, explosion-proof box 10, and explosion-proof electric heating assembly 3. The outer cylinder flange connection cover 9 is disc-shaped with a through hole in the middle; the inner cylinder 2 is cylindrical, with a gas inlet pipe 201 provided on the upper part of the side of the inner cylinder 2, and a second flange connection part 202 provided on the top opening edge of the inner cylinder 2; the inner cylinder 2 passes through the through hole in the middle of the outer cylinder flange connection cover 9, and the through hole position is sealed and connected by welding; the explosion-proof box 10 is installed on the top opening of the inner cylinder 2. The explosion-proof box 10 is cylindrical, with a third flange connection part 1001 provided on the edge of the bottom surface of the explosion-proof box 10; the explosion-proof electric heating assembly 3 is connected to the bottom surface of the explosion-proof box 10. The explosion-proof box 10 is flange-connected to the top opening of the inner cylinder 2. The explosion-proof electric heating assembly 3 installed on the bottom surface of the explosion-proof box 10 extends into the interior of the inner cylinder 2. As shown in Figure 3 The outer cylinder flange connection cover 9 covers the top opening of the outer cylinder 1, and is flange-connected.

[0066] Further, in one embodiment of the present application, a circular ring-shaped flow equalizing plate 11 can be further provided on the inner cylinder 2, with a circular through hole provided in the middle of the flow equalizing plate 11, and air holes distributed on the flow equalizing plate 11. The inner cylinder 2 passes through the through hole in the middle of the flow equalizing plate 11, and the through hole position is connected by welding. As shown in Figure 5 In the assembled deoxidizer B, the flow equalizing plate 11 is located inside the outer cylinder 1, and the flow equalizing plate 11 is higher than the charging port 102 and lower than the gas discharge pipe 101.

[0067] The explosion-proof electric heating assembly 3 in the present application can be selected from the following forms.

[0068] As shown in the embodiment shown in Figure 13 The explosion-proof electric heating assembly 3 includes two U-shaped heating pipes arranged in parallel. Of course, the heating pipes can also be designed in other shapes such as spiral shape. By increasing the heat exchange surface area of the heating pipes, the heating efficiency can be improved.

[0069] In a preferred embodiment, a downward-facing spiral channel 1201 is provided inside the inner cylinder 2. This enhances the heating effect by increasing the length of the gas passage path. Figure 14 The diagram shows the downward-facing spiral channel 1201 inside the inner cylinder 2 of this application. A cylindrical heating tube is positioned along the axis of the inner cylinder 2, and a spiral body 12 is arranged along the axis of the heating tube, forming the downward-facing spiral channel 1201. A gas inlet pipe 201 connects to the spiral channel 1201, and gas entering through the gas inlet pipe 201 flows downward along the spiral channel 1201. The bottom outlet of the spiral channel 1201 connects to the diffusion space.

[0070] When the heating tube is heated, it is heated together with the spiral body 12. The gas flows through the spiral channel 1201 to increase the temperature.

[0071] Furthermore, the aforementioned existing deoxidizer B often suffers from low catalyst utilization efficiency due to uneven airflow distribution. Therefore, in one specific embodiment of this application, a conical diffuser plate 13 is provided below the opening at the bottom of the inner cylinder 2. The diameter of the diffuser plate 13 is larger than the diameter of the inner cylinder 2, and the diffuser plate 13 is coaxially arranged with the inner cylinder 2, with its tip pointing upwards. Gas exiting from the opening at the bottom of the inner cylinder 2 diffuses outwards along the conical surface of the diffuser plate 13, then passes upwards through the vents on the material support 5 and enters the catalyst bed for catalytic reaction.

[0072] There are several ways to install the diffuser plate 13, such as... Figure 14 As shown, the diffuser plate 13 can be connected to the bottom end of the heating tube. Figure 15 The diagram shown illustrates the second installation method of the diffusion plate 13 in this application. Figure 15 In the middle, the diffuser plate 13 is installed on the inner cover 804 of the base 8.

[0073] like Figure 16 The image shown is a cross-sectional view of the base 8 of this application. (As shown...) Figure 17 The figure shows an exploded view of the internal structure of the base 8 of this application. The base 8 is cylindrical, and the upper and lower opening edges of the base 8 are provided with annular fourth flange connection parts 801; a bottom cover 802 is installed at the bottom of the base 8, and the upper opening of the base 8 is connected to the lower opening of the outer cylinder 1 by a flange. A lifting drive device 6 is installed inside the base 8 and on the bottom cover 802; the lifting drive device 6 shown in the figure is a hydraulic cylinder, with the piston rod of the hydraulic cylinder facing upward, and a support frame 7 is provided at the top of the piston rod; the support frame 7 shown in the figure includes a cross support plate 701 and four support rods 702; four support arms are arranged in a circular array on the cross support plate 701, and a vertically upward support rod 702 is provided at the end of each support arm; the tops of the four support rods 702 are detachably connected to a material support body 5.

[0074] Figure 17The material support 5 shown in the figure is a circular ring, and the surface is covered with air holes. The top end of the four support rods 702 is provided with a threaded connection hole, and the material support 5 is correspondingly provided with a through hole for connection. The material support 5 is detachably connected to the top end of the four support rods 702 by using a bolt.

[0075] Further, in order to avoid direct contact of the gas with the lifting driving device 6, in one specific embodiment of the present application, an inner cover 804 is arranged in the base 8. As shown in the figure, Figure 16 As shown in the figure, the circular inner cover 804 is detachably mounted in the base 8, and the inner cover 804 is located above the lifting driving device 6. The four support rods 702 pass through the through holes on the inner cover 804 and extend into the inside of the outer cylinder 1. Specifically, a plurality of cover supports 803 are arranged on the inner wall of the base 8, and the plurality of cover supports 803 are at the same height. The bottom edge of the inner cover 804 is lapped on the cover supports 803, and threaded connection holes are arranged on the inner cover 804 and the cover supports 803. The inner cover 804 is fixed on the cover supports 803 by using a bolt. In order to improve the sealing performance, a ring of elastic sealing rings is arranged on the edge of the inner cover 804, and the sealing rings are in interference fit with the inner wall of the base 8. In addition, linear bearings are arranged in the through holes on the inner cover 804 through which the four support rods 702 pass. The support rods 702 pass through the linear bearings and move up and down.

[0076] In the present application, the material support 5 can adopt the following forms.

[0077] Figure 16 As shown in the figure, the material support 5 is a circular ring plate, and the surface is covered with air holes. In this scheme, the discharge port 103 is in communication with the inside of the outer cylinder 1, and part of the gas will accumulate in the discharge port 103. In order to solve this technical problem, in one improved scheme of the present application, a circular ring plate-shaped material support 5 is arranged on the edge of the material support 5. As shown in the figure, Figure 18 As shown in the figure, a circular ring plate-shaped material support 5 is arranged on the edge of the material support 5. As shown in the figure, Figure 19 As shown in the figure, the cover part 501 covers the discharge port 103. As shown in the figure, Figure 20 As shown in the figure, the cover part 501 descends to expose the discharge port 103. As shown in the figure, Figure 19 As shown in the figure, when the upper surface of the material support 5 is raised to be higher than the discharge port 103, the cover part 501 covers the discharge port 103. As shown in the figure, Figure 20 As shown in the figure, when the upper surface of the material support 5 descends into the discharge port 103, the discharge port 103 is in communication with the filler space 104.

[0078] Further, when the upper surface of the material support 5 is a plane, it is difficult to discharge the material. In one improved scheme of the present application, the upper surface of the material support 5 is improved to be an inclined surface. As shown in the figure, Figure 21The upper surface of the material support 5 is improved to be inclined surface. As shown in Figure 21 The upper surface of the material support 5 is improved to be inclined surface. The inclined surface is lower on the side of the discharge port 103 than on the side away from the discharge port 103.

[0079] The upper surface of the material support 5 is improved to be inclined surface. As shown in Figure 22 The upper surface of the material support 5 is improved to be inclined surface. As shown in Figure 1 . Figure 23 The upper surface of the material support 5 is improved to be inclined surface. As shown in Figure 2 In an alternative, the material support 5 is a cylindrical shell with a through hole in the middle, and the inner cylinder 2 passes through the through hole. The side of the cylindrical shell is raised to cover the discharge port 103. The upper surface of the material support 5 is inclined surface, which is lower on the side of the discharge port 103 than on the side away from the discharge port 103. A plurality of mounting through holes 502 are provided on the upper surface of the material support 5, and a diffusion pipe 503 is mounted in each mounting through hole 502. Figure 22 The diffusion pipe 503 is a cylindrical hollow pipe, which is detachably mounted in the mounting through hole 502 and protrudes from the upper surface of the material support 5. The diffusion pipe 503 is provided with diffusion holes on the surface. The gas enters the diffusion pipe 503 from the mounting through hole 502, and then enters the catalyst bed for reaction through the diffusion holes.

[0080] In a specific embodiment of the present application, eight mounting through holes 502 are arranged in a ring array on the upper surface of the material support 5. The mounting through holes 502 are provided with internal threads, and the diffusion pipe 503 is provided with external threads. The diffusion pipe 503 is screwed into the mounting through hole 502. Preferably, the top of the diffusion pipe 503 is hemispherical, and is provided with diffusion holes facing outward.

[0081] Figure 22 The diffusion pipe 503 is relatively short and protrudes from the upper surface of the material support 5. In order to fully utilize the catalyst, the length of the diffusion pipe 503 can be designed to be longer in the present application. As shown in Figure 24 The diffusion pipe 503 is relatively short and protrudes from the upper surface of the material support 5. In order to fully utilize the catalyst, the length of the diffusion pipe 503 can be designed to be longer in the present application. As shown in

[0082] Further, in an alternative, the material support 5 in the present application can be vibrated, the vibration makes the material on the material support 5 more evenly distributed, avoiding the material to be accumulated on one side when filling. In addition, the vibration function can accelerate the discharging speed when discharging. Of course, the vibration can also make the material accumulated for a long time loose, avoiding caking. The present application is provided with a vibration drive for driving vibration, and the installation position of the vibration drive can be selected as the following preferred position.

[0083] As shown in Figure 25 , it is a structure display diagram of the first vibration drive provided by the present application. In a specific embodiment of the present application, four support rods 702 are each provided with a vibration drive at the top end, and the vibration drive can adopt a cylindrical voice coil motor 14, and the moving part 1401 of the voice coil motor 14 is connected with the material support 5. Preferably, the four support rods 702 adopt hollow pipes, and the wires of the voice coil motor 14 are routed inside the support rods 702. After the voice coil motor 14 is started, the material support 5 is vibrated up and down. Further, as shown in Figure 25 , the inner edge and the outer edge of the material support 5 are provided with annular elastic rubber rings 504, avoiding rigid collision with the outer cylinder 1 and the inner cylinder 2 when the material support 5 is vibrated.

[0084] As shown in Figure 26 , it is a second vibration drive structure display diagram provided by the present application. In another alternative of the present application, a cylindrical voice coil motor 14 is mounted on the cross support plate 701 and at the bottom end of the four support rods 702, and the body of the cylindrical voice coil motor 14 is fixed on the cross support plate 701, and the moving part 1401 of the voice coil motor 14 is connected with the support rod 702 together.

[0085] Further, the present application provides a hydrogen purification system, as shown in Figure 27 , it is a schematic diagram of the hydrogen purification system of the present application. The system adopts a deoxidizer B plus three drying towers working process. The system is also the mainstream process system at present.

[0086] The hydrogen purification system mainly includes: one deoxidizer B, three drying towers, four coolers, four gas-water separators; in order to facilitate the description, the three drying towers are respectively named as the first drying tower D1, the second drying tower D2, and the third drying tower D3; the four coolers are respectively named as the deoxidation cooler C, the first drying cooler E1, the second drying cooler E2, and the third drying cooler E3; the four gas-water separators are respectively named as the first gas-water separator F1, the second gas-water separator F2, the third gas-water separator F3, and the fourth gas-water separator F4. The devices are connected through pipelines. Among them, the deoxidizer B, the deoxidation cooler C, and the first gas-water separator F1 are used together; each drying tower is matched with a drying cooler and a gas-water separator.

[0087] The working principle of the hydrogen purification system is as follows: hydrogen first passes through the deoxidizer B, and under the action of the catalyst, the oxygen in the hydrogen reacts with the hydrogen to generate water. Then, the gas passes through the deoxidizing cooler C to condense the gaseous water in the gas into liquid water, and then enters the first gas-water separator F1 for gas-water separation; then enters the drying tower for drying. The three drying towers are periodically alternately worked and regenerated, so their design conditions are completely the same. The drying tower is provided with molecular sieve, which has a certain adsorption effect on water, oxygen and other impurities, so as to achieve the purpose of removing water.

[0088] As Figure 28 shown is a structure display diagram of a drying tower provided by the present application. The drying tower structure is basically the same as the structure of the deoxidizer B in the present application, and is also an inner and outer cylinder structure, including an outer cylinder body 1 and an inner cylinder body 2; the inner cylinder body 2 is nested in the inner part of the outer cylinder body 1. The inner part of the outer cylinder body 1 is a closed chamber, and a gas discharge pipe 101 is arranged on the side of the outer cylinder body 1. The inner cylinder body 2 penetrates into the inner part of the outer cylinder body 1 from the top end of the outer cylinder body 1; the top end of the inner cylinder body 2 is closed and protrudes from the top of the outer cylinder body 1, and a gas inlet pipe 201 is arranged on the part of the inner cylinder body 2 protruding from the top of the outer cylinder body 1. The bottom of the inner cylinder body 2 is open and communicates with the inner part of the outer cylinder body 1. An explosion-proof electric heating assembly 3 is arranged in the inner cylinder body 2.

[0089] The difference between the drying tower and the deoxidizer B of the present application is that the bottom of the outer cylinder body 1 is closed by a lower head 15, a position-fixed material support body 5 is arranged in the inner part of the outer cylinder body 1 around the inner cylinder body 2, the material support body 5 is provided with a vent hole, and the space above the material support body 5 is a packing space 104 for loading molecular sieve.

[0090] The three drying towers are periodically alternately worked and regenerated, and the main working processes can be switched by pneumatic ball valves to realize automatic control requirements. Through the switching of the valves, the working process can be in the following three states.

[0091] ① State 1: the first drying tower D1 adsorbs; the second drying tower D2 regenerates and cold blows; and the third drying tower D3 secondly adsorbs.

[0092] ② State 2: the first drying tower D1 secondly adsorbs; the second drying tower D2 adsorbs; and the third drying tower D3 regenerates and cold blows.

[0093] ③ State 3: the first drying tower D1 regenerates and cold blows; the second drying tower D2 secondly adsorbs; and the third drying tower D3 adsorbs.

[0094] In the adsorption state: the drying tower is not heated, and full gas volume of hydrogen is introduced for operation, at this time, the water in the hydrogen after deoxidation will be adsorbed on the surface of the molecular sieve, and the hydrogen drying process is completed.

[0095] Regeneration, cold blowing state: including heating stage and blowing cold stage. Among them, the heating stage: the electric heating component (electric heating pipe) in the drying tower works with power on, the temperature in the drying tower will gradually rise, the water adsorbed on the molecular sieve will be gradually desorbed, when the temperature at the upper part of the drying tower reaches the interlocking limit value, regeneration is completed, at this time the control electric heating element stops heating. The blowing cold stage: after the electric heating element of the drying tower stops heating, the hydrogen gas flow with lower temperature continues to flow through the drying tower according to the original path, so that the drying tower cools down, and when the temperature reaches the set temperature, the blowing cold stage of the drying tower is completed, and the working state is switched.

[0096] Secondary adsorption state: the drying tower removes the water in the hydrogen gas (regeneration, cold blowing gas) by adsorption of the molecular sieve.

[0097] The principle of regeneration is to use hydrogen to raise the temperature of the molecular sieve in the drying tower to 250℃, so that the adsorbed impurities are desorbed and taken out of the system. The water resolved by the molecular sieve is first condensed by the cooler, and the condensed water is automatically discharged through the automatic valve. The regeneration process has no hydrogen discharge, and the blowing cold stage has a vacuum treatment to release the adsorbed impurities. The discharge amount is not greater than 0.5% of the total H2 production per cycle.

[0098] In a specific embodiment of the present application, the working process of the drying tower is as follows: at the beginning, the first drying tower D1 is regenerated, the second drying tower D2 works, and the third drying tower D3 works. Every 36 hours is a cycle period. Specifically, first, hydrogen enters the first drying tower D1, where the hydrogen is heated by the electric heating pipe, the heated hydrogen raises the temperature of the molecular sieve in the first drying tower D1 to 250℃, the water and impurities in the molecular sieve are vaporized and desorbed and taken out of the tower, and the condensed water is generated by the cooler, and the condensed water is automatically discharged to the outside of the system through the water collector. Hydrogen continues to enter the second drying tower D2 and is primary dried, and finally hydrogen enters the third drying tower D3 and is dried again to obtain qualified hydrogen which is then sent to the storage tank; 8 hours later, the first drying tower D1 completes heating and enters the blowing cold stage, the first drying tower D1 is no longer heated, (4 hours later, the first drying tower D1 enters the working state), at the same time, the raw hydrogen directly enters the second drying tower D2, the second drying tower D2 starts to heat and regenerate, and then the hydrogen enters the third drying tower D3 and is dried to obtain qualified hydrogen for external supply; 8 hours later, the second drying tower D2 enters the blowing cold stage (4 hours later, it enters the working state), at the same time, the third drying tower D3 starts to heat and regenerate, and the first drying tower D1 which has completed the blowing cold stage enters the working state; the first drying tower D1 works for 12 hours and then enters the heating and regeneration stage. In this way, a cycle is completed.

[0099] In a cycle, each drying tower is heated and regenerated for 8 hours and blown cold for 4 hours. The adsorption period of the drying tower is 12 hours, and the cycle of the three drying towers is 36 hours. Since the three drying towers are periodically switched to work, the design conditions of the three drying towers are the same.

[0100] Further, the present application also provides a skid-mounted hydrogen purification system for overall transportation. As shown in Figure 29 The present application is a skid-mounted hydrogen purification system. The hydrogen purification system is installed on a steel chassis. The largest and highest deoxidizer B and three drying towers are installed in the back row. The four coolers with medium volume and height are installed in the middle row. The four gas-water separators with the smallest volume and the lowest height are installed in the front row. The deoxidizing cooler C is arranged in front of the deoxidizer B, and the first gas-water separator F1 is arranged in front of the deoxidizing cooler C. Each drying tower is correspondingly provided with a drying cooler and a gas-water separator in front.

[0101] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, modifications can be made to these features and embodiments to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A hydrogen deoxidizer for hydrogen production by water electrolysis, characterized by, The deoxygenator comprises an outer cylinder (1) and an inner cylinder (2), the inner cylinder (2) is nested in the outer cylinder (1); a gas discharge pipe (101) is arranged on the upper part of the side of the outer cylinder (1), the top of the inner cylinder (2) is closed and exceeds the top of the outer cylinder (1), a gas inlet pipe (201) is arranged on the part of the inner cylinder (2) exceeding the top of the outer cylinder (1); the bottom opening of the inner cylinder (2) located in the inner part of the outer cylinder (1) is communicated with the inner part of the outer cylinder (1); an explosion-proof electric heating assembly (3) is arranged in the inner part of the inner cylinder (2); a feeding opening (102) and a discharging opening (103) are arranged on the side of the outer cylinder (1), the feeding opening (102) is located on the upper part of the side of the outer cylinder (1); the discharging opening (103) is located on the lower part of the side of the outer cylinder (1), and the discharging opening (103) is higher than the bottom opening of the inner cylinder (2); a material supporting body (5) capable of moving up and down is arranged in the inner part of the outer cylinder (1) and around the inner cylinder (2), and air holes are arranged on the material supporting body (5); a space above the material supporting body (5) is a filling space (104) for loading catalyst; a lifting driving device (6) is arranged at the bottom of the outer cylinder (1); the material supporting body (5) is connected with the lifting driving device (6) through a supporting frame (7), and the material supporting body (5) can be driven to move up and down along the inner cylinder (2) by the lifting driving device (6); when filling is needed, the material supporting body (5) is moved upwards to exceed the discharging opening (103); when discharging is needed, the material supporting body (5) is moved downwards to make the discharging opening (103) communicated with the filling space (104) above the material supporting body (5).

2. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 1, characterized by, The deoxygenator comprises an outer cylinder (1), an inner cylinder assembly and a base (8), which are connected through flanges.

3. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 2, characterized by, A conical guide plate is arranged in the inner part of the outer cylinder (1), and the guide plate is arranged below the feeding opening (102); the guide plate extends downwards and inwards, and a circular gap is formed in the center of the guide plate; in the assembled deoxygenator, the inner cylinder (2) passes through the circular gap in the center of the guide plate, and a gap is left between the edge of the circular gap and the outer wall of the inner cylinder (2), which allows the material to pass through and fall into the space below.

4. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 2, characterized by, The inner cylinder assembly comprises an inner cylinder (2), an outer cylinder flange connecting cover (9), an explosion-proof box (10) and an explosion-proof electric heating assembly (3); a through hole is arranged in the middle of the outer cylinder flange connecting cover (9); the cylindrical inner cylinder (2) passes through the through hole in the middle of the outer cylinder flange connecting cover (9), and the through hole is connected by welding sealing; the explosion-proof box (10) is installed on the top opening of the inner cylinder (2) through flange connection; the explosion-proof electric heating assembly (3) is connected to the bottom surface of the explosion-proof box (10); a flow equalizing plate (11) is arranged on the inner cylinder (2), and air holes are arranged on the flow equalizing plate (11); in the assembled deoxygenator, the flow equalizing plate (11) is located in the inner part of the outer cylinder (1), and the flow equalizing plate (11) is higher than the feeding opening (102) and lower than the gas discharge pipe (101).

5. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 2, characterized by, The bottom of the base (8) is provided with a bottom cover (802), and the opening of the base (8) is connected with the lower opening of the outer cylinder (1) by flange connection; the lifting driving device (6) is installed on the inside of the base (8) and the bottom cover (802); the lifting driving device (6) is a hydraulic cylinder, the piston rod of the hydraulic cylinder is upward, and a support frame (7) is arranged at the top end of the piston rod; the support frame (7) comprises a cross support plate (701) and four support rods (702); four support arms are arranged in an annular array on the cross support plate (701), and one vertical upward support rod (702) is arranged at the end of each support arm; the four support rods (702) are detachably connected with the material support body (5) at the top ends; an inner cover (804) is arranged in the base (8), and the inner cover (804) is located above the lifting driving device (6); the support rods (702) pass through the through holes in the inner cover (804) and extend into the inside of the outer cylinder (1).

6. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 1, characterized by, The explosion-proof electric heating assembly (3) comprises a heating pipe; the heating pipe is two U-shaped heating pipes arranged in parallel; or the heating pipe is a spiral heating pipe; or the heating pipe is arranged in the inner cylinder (2) along the axis, a spiral body (12) is arranged along the axis direction of the heating pipe, and a downward spiral channel (1201) is formed in the spiral body (12); the gas inlet pipe (201) is connected with the spiral channel (1201), and the gas entering from the gas inlet pipe (201) flows downward along the spiral channel (1201) and enters the diffusion space.

7. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 1, characterized by, A conical diffusion plate (13) is arranged below the bottom end opening of the inner cylinder (2), the diameter of the diffusion plate (13) is greater than the diameter of the inner cylinder (2), the diffusion plate (13) is coaxial with the inner cylinder (2), and the tip of the diffusion plate (13) is upward.

8. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 1, characterized by, The feeding port (102) is an upwardly curved circular pipe, the end of the circular pipe is provided with a circular opening, and a circular sealing cover is arranged on the circular opening; the discharging port (103) is a discharging channel surrounded by four surfaces; the four surfaces forming the discharging port (103) extend away from the outer cylinder (1) from the notch on the outer cylinder (1), and form a rectangular opening at the end, the rectangular opening is arranged obliquely downward, and a rectangular sealing cover is arranged on the rectangular opening.

9. The hydrogen deoxidizer for hydrogen production by water electrolysis according to claim 1, characterized by, The upper surface of the material support body (5) is a plane or an inclined surface; when the upper surface is an inclined surface, the side away from the discharging port (103) is higher than the side close to the discharging port (103); the material support body (5) is provided with a covering part (501), when the upper surface of the material support body (5) is raised to be higher than the discharging port (103), the covering part (501) can cover the discharging port (103); the material support body (5) can be vibrated by vibration driving, and the vibration driving is installed on the support frame (7).

10. A hydrogen purification system, characterized by, The deoxidizer of any one of claims 1-9 further comprises three drying towers, the drying tower is an inner and outer cylinder structure, comprising an outer cylinder (1) and an inner cylinder (2); the inner cylinder (2) is nested in the inner part of the outer cylinder (1); the inner part of the outer cylinder (1) is a closed chamber, and the outer cylinder (1) is provided with a gas discharge pipe (101) on the side; the inner cylinder (2) penetrates into the inner part of the outer cylinder (1) from the top of the outer cylinder (1); the top of the inner cylinder (2) is closed and exceeds the top of the outer cylinder (1), and the part of the inner cylinder (2) exceeding the top of the outer cylinder (1) is provided with a gas inlet pipe (201); the bottom of the inner cylinder (2) is open and communicates with the inner part of the outer cylinder (1); the inner part of the inner cylinder (2) is provided with an explosion-proof electric heating assembly (3); the bottom of the outer cylinder (1) is closed by a lower head (15), and the inner part of the outer cylinder (1) is provided with a fixed-position material support (5) around the inner cylinder (2), the material support (5) is provided with a vent hole, and the space above the material support (5) is a filler space (104) for loading molecular sieve; hydrogen gas first passes through the deoxidizer, and under the action of the catalyst, the oxygen in the hydrogen gas reacts with the hydrogen gas to generate water; then, the gas passes through the deoxidizing cooler to condense the gaseous water in the gas into liquid water, and then enters the first gas-water separator for gas-water separation; then, it enters the drying tower for drying; the three drying towers work periodically and alternately and are regenerated.

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