Multi-layer microwave dehydration reactor structure for hydrogen purification

Abstract

According to the multilayer microwave dehydration reactor structure for hydrogen purification, a gas outlet pipeline, a drainage pipeline and a dehydrating agent discharge port are arranged at the lower end of a reactor, an inner side smooth reflecting frame is annularly arranged on the inner wall of a main tank body, and the inner side smooth reflecting frame is in the shape of an annular cylinder; a plurality of microwave generators are arranged on the inner side surface of the inner side smooth reflecting frame in an embedded annular equidistant array mode, a plurality of layers of reaction dehydrating agents are horizontally arranged on the inner side of the inner side smooth reflecting frame in the transverse direction, the microwave dehydrating technology is adopted instead of a traditional electric heating mode, efficiency is higher, and energy consumption is lower. The deoxidation reactor is combined to lead out hot air for collaborative dehydration, heat energy is fully utilized, efficiency is improved, and energy consumption is reduced; due to the fact that microwave heating is high in penetrability, directly acts on water molecules and is not subjected to traditional heat transfer heating dehydration, dehydration is quicker, cooling is quicker, cooling and heating time is short, and produced hydrogen is purer.

Description

Technical Field

[0001] This article belongs to the technical field of microwave dehydration reactors, and specifically relates to a multi-layer microwave dehydration reactor structure for hydrogen purification. Background Art

[0002] Currently, pressure swing adsorption (PSA) or temperature swing adsorption (TSA) are widely used methods in the field of gas purification. Since the purity of hydrogen produced by electrolysis is already relatively high, basically above 99%, the purification capacity of traditional PSA is limited if further improvements are made. Therefore, catalytic deoxygenation combined with TSA purification is often used in hydrogen production by electrolysis to obtain higher-purity hydrogen without sacrificing hydrogen and hydrogen production capacity.

[0003] As the temperature of the gas delivery pipe drops, moisture in the gas will separate and condense, sometimes even freezing, causing gas supply problems. The presence of moisture not only reduces the hydrogen pipeline's transport capacity and the gas's calorific value, but also, under certain conditions, can form hydrates, clogging pipelines and equipment, increasing pressure drop in the gas gathering pipeline and impacting smooth gas supply. When the gas contains acidic gases, liquid water can accelerate H2S and CO2 corrosion on pipelines and equipment. Therefore, deep dehydration is even more necessary to prevent the formation of ice or hydrates at condensation temperatures. This ensures that the water content requirements for subsequent gas processing, pipeline transportation, and commercial hydrogen are met.

[0004] However, the existing traditional electric heating (heat conduction) form has low efficiency and high energy consumption. It requires slow heating of hydrogen, has weak heating penetration, and takes a long time to cool and heat. The produced hydrogen also contains impurities. Utility Model Content

[0005] In order to solve the above problems, this paper proposes a multi-layer microwave dehydration reactor structure for hydrogen purification. The reactor is a vertical split tank body. The upper end of the main tank body of the reactor is connected to the cover through a flange surface. The upper end of the reactor is provided with an air inlet channel and a dehydrating agent inlet. The lower end of the reactor is provided with an air outlet pipe, a drainage pipe and a dehydrating agent outlet. The inner wall of the main tank body is provided with an inner smooth reflection frame in an annular shape. The inner smooth reflection frame is in the shape of an annular cylinder. The inner surface of the inner smooth reflection frame is embedded with a plurality of microwave generators in an annular equidistant array. The inner side of the inner smooth reflection frame is provided with a plurality of microwave generators in a horizontal direction. The outer side of each layer of reaction dehydrating agent is provided with a dehydrating agent upper baffle, a dehydrating agent lower baffle and a fixed side baffle. The microwave generators are all horizontally facing the interior of the main tank body. Microwave dehydration technology is adopted instead of the traditional electric heating (heat conduction). The efficiency is higher and the energy consumption is lower. The hot air is drawn out in combination with the deoxygenation reactor for collaborative dehydration, which makes full use of thermal energy, improves efficiency and saves energy. Since microwave heating has strong penetrability and acts directly on water molecules, it uses non-traditional heat transfer heating dehydration, so the dehydration is faster and the cooling is faster. Therefore, the cooling and heating time are short and the produced hydrogen is purer.

[0006] The main tank body is in the shape of a U-shaped tank body, and the upper end surface of the main tank body is provided with a flange surface, and the inner vertical surface of the main tank body is embedded with an inner smooth reflector frame, and the bottom outer center of the main tank body is provided with a drainage pipe vertically, and the bottom outer side of the main tank body is provided with an air outlet pipe and a dehydrating agent outlet obliquely and symmetrically. The shape of the cover is an arc-shaped spherical cover, and the bottom end surface of the cover is provided with a flange surface, and the upper outer center of the cover is provided with an air inlet channel vertically, and the upper outer side of the cover is provided with a dehydrating agent addition port obliquely. The U-shaped tank body can facilitate the arrangement of the inner smooth reflector frame and the baffle inside the main tank body. After installation, it is connected and sealed with the cover from above through the flange surface, and the top-in and bottom-out arrangement facilitates the rapid discharge of materials after reaction.

[0007] The inner smooth reflector is in the shape of an annular cylindrical frame, and the surface of the inner smooth reflector is a highly reflective surface. A plurality of generator assembly holes are arranged in an annular equidistant array on the surface of the inner smooth reflector. The generator assembly holes are all horizontal through holes, and microwave generators are arranged inside the generator assembly holes. The inner smooth reflector can not only conveniently assemble the microwave generator and the baffle plate, but also achieve efficient reflection of microwaves through the smooth surface of the reflector, thereby improving the efficiency of microwave use.

[0008] The microwave generator is a high-frequency, high-penetration heating microwave generator. The generating head of the microwave generator is located inside the main tank. The microwave generator can be used to conveniently heat the inside of the reactor with microwaves, achieving higher efficiency and lower energy consumption.

[0009] The upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent are both bracket-type circular baffle plates. Air guide holes are provided on the surfaces of the upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent. The air guide holes are dense supporting air holes. A fixed side baffle is provided in an outer ring between the upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent. The fixed side baffle is in the shape of an annular plate. The air guide holes on the surfaces of the upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent can allow the dehydrating agent to pass through between the dehydrating agents by blowing air from top to bottom. The lower baffle has the function of guiding air and supporting the catalyst, and the upper baffle ensures that the compacted dehydrating agent does not move or blow away.

[0010] The fixed side baffle is in the shape of an annular plate or annular net. The outer surface of the fixed side baffle is a highly reflective surface. The baffle is made of high-strength fiberglass net, lightweight ceramic tube, etc. to fix the position of the catalyst to avoid lateral displacement.

[0011] The reaction dehydrating agent is a composite dehydrating particle with a particle size of 3-5mm and 1.5-3.0mm. The reaction dehydrating agent includes 13x molecular sieve, alumina and color-changing silica gel. The composite dehydrating agent can not only quickly absorb the water molecules inside the gas, but also can be used repeatedly through standing and reprocessing, thereby improving economic efficiency.

[0012] Beneficial effects:

[0013] The reactor uses microwave dehydration technology instead of traditional electric heating (heat conduction), which is more efficient and has lower energy consumption. It is combined with the deoxygenation reactor to draw out hot air for collaborative dehydration, making full use of thermal energy, improving efficiency and saving energy consumption. Due to the strong penetrability of microwave heating, it acts directly on water molecules, rather than traditional heat transfer heating dehydration, so its dehydration is faster and the cooling is faster. Therefore, its cooling and heating time is short, and the hydrogen produced is purer.

[0014] The U-shaped tank body makes it possible to conveniently set a smooth inner reflector frame and baffle inside the main tank body. After installation, it is connected and sealed with the cover through the flange surface from above, and the top-in and bottom-out setting facilitates the rapid discharge of materials after reaction.

[0015] The smooth inner reflector frame not only facilitates the assembly of the microwave generator and the retaining frame, but also enables efficient reflection of microwaves through the smooth surface of the reflector frame, thereby improving the efficiency of microwave use.

[0016] The air guide holes on the surface of the upper baffle and the lower baffle of the dehydrating agent can allow the dehydrating agent to be blown from top to bottom to allow the gas to pass through the dehydrating agent. The lower baffle has the function of guiding air and supporting the catalyst, and the upper baffle ensures that the compacted dehydrating agent does not move or be blown away.

[0017] The composite dehydrating agent can not only quickly absorb the water molecules inside the gas, but also can be used repeatedly through standing and reprocessing, thereby improving economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an internal cross-sectional view of a multi-layer microwave dehydration reactor structure for hydrogen purification;

[0019] In the figure; 1, air inlet channel, 2, dehydrating agent addition port, 3, microwave generator, 4, dehydrating agent upper baffle, 5, inner smooth reflection frame, 6, reaction dehydrating agent, 7, air outlet pipe, 8, drainage pipe, 9, dehydrating agent discharge port, 10, dehydrating agent lower baffle, 11, fixed side baffle, 12, flange surface, 13, sealing cover. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] Air inlet channel 1, dehydrating agent adding port 2, microwave generator 3, dehydrating agent upper baffle 4, inner smooth reflection frame 5, reaction dehydrating agent 6, air outlet pipe 7, drainage pipe 8, dehydrating agent discharge port 9, dehydrating agent lower baffle 10, fixed side baffle 11, flange surface 12, and cover 13.

[0022] like Figure 1 As shown;

[0023] A multi-layer microwave dehydration reactor structure for hydrogen purification, the reactor is a vertical split tank body, the upper end of the main tank body of the reactor is connected to the cover 13 through a flange surface 12, the upper end of the reactor is provided with an air inlet channel 1 and a dehydrating agent inlet 2, the lower end of the reactor is provided with an air outlet pipe 7, a drainage pipe 8 and a dehydrating agent outlet 9, an inner smooth reflection frame 5 is provided in an annular shape on the inner wall of the main tank body, the inner smooth reflection frame 5 is in the shape of an annular cylinder, and a plurality of microwave generators 3 are embedded in the inner surface of the inner smooth reflection frame 5 in an annular equidistant array. Several layers of reaction dehydrating agent 6 are arranged horizontally on the inside, and the outside of each layer of reaction dehydrating agent 6 is provided with a dehydrating agent upper baffle 4, a dehydrating agent lower baffle 10 and a fixed side baffle 11. The microwave generator 3 is all horizontally facing the inside of the main tank body. The shape of the main tank body is a U-shaped tank body. The upper end surface of the main tank body is provided with a flange surface 12. The vertical surface of the inner side of the main tank body is embedded with an inner smooth reflection frame 5. The center of the bottom outside of the main tank body is vertically provided with a drainage pipe 8. The outer side of the bottom of the main tank body is obliquely symmetrically provided with an outlet pipe 7 and a dehydrating agent outlet 9, and a cover 13. The shape is an arc-shaped spherical cover, the bottom end surface of the cover 13 is provided with a flange surface 12, the upper end of the cover 13 is provided with an air inlet channel 1 vertically at the center of the outer side, the upper end of the cover 13 is provided with a dehydrating agent addition port 2 obliquely, the inner smooth reflector 5 is shaped like an annular cylindrical frame, the surface of the inner smooth reflector 5 is a highly reflective surface, the surface of the inner smooth reflector 5 is provided with a plurality of generator assembly holes in an annular equidistant array, the generator assembly holes are all horizontal through holes, the inside of the generator assembly holes are provided with a microwave generator 3, the microwave generator 3 is a high-frequency and high-penetration heating microwave device, the microwave The generating head of the generator 3 is inside the main tank body, the dehydrating agent upper baffle 4 and the dehydrating agent lower baffle 10 are both bracket-type circular baffles, and the surfaces of the dehydrating agent upper baffle 4 and the dehydrating agent lower baffle 10 are provided with air guide holes, and the air guide holes are intensive supporting air holes. A fixed side baffle 11 is provided in an outer ring between the dehydrating agent upper baffle 4 and the dehydrating agent lower baffle 10. The fixed side baffle 11 is in the shape of a ring plate, and the outer surface of the fixed side baffle 11 is a highly reflective surface. The reaction dehydrating agent 6 is a composite dehydrated particle, and the reaction dehydrating agent 6 includes 13x molecular sieve, alumina and color-changing silica gel.

[0024] Implementation examples;

[0025] The dehydrating agent is gradually and layer by layer added into the inner smooth reflector through the open flange surface 12. First, small particles of dehydrating agent 1.5-3.0 mm are placed into the inner smooth reflector of the lower layer. The mesh diameter of the dehydrating agent lower baffle 10 of the inner smooth reflector of the bottom layer is 0.5 mm. Then, large particles of catalyst 3-5 mm are placed into the inner smooth reflector of the upper layer. The mesh diameter of the dehydrating agent lower baffle 10 of the inner smooth reflector of the upper layer is 0.5 mm. This arrangement can effectively reduce the generation and deposition of broken catalyst and cause gas dust pollution.

[0026] During use, the air inlet pipe will fill the hydrogen with a relatively high temperature into it, and at the same time, the microwave generator 3 will be started to emit to the interior of the main tank body. The microwaves will be repeatedly reflected by the smooth surface of the inserted smooth reflector and the fixed side baffle 11, so that the heat of the microwaves is concentrated, and the hydrogen entering the tank body reacts with the dehydrating agent, so that the dehydrating agent can adsorb the saturated molecular sieve and quickly remove moisture.

[0027] The dehydrating agent in the reaction is slowly blown downward through the air guide holes on the surface of the baffle, passing through each layer of baffle in turn, thereby achieving high-efficiency repeated use of the dehydrating agent, until the dehydrating agent completely falls to the bottom of the tank and is discharged together.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-layer microwave dehydration reactor structure for hydrogen purification, wherein the reactor is a vertically split tank body, the upper end of the main tank body of the reactor is connected to the cover via a flange surface, the upper end of the reactor is provided with an air inlet channel and a dehydrating agent inlet, and the lower end of the reactor is provided with an air outlet pipe, a drainage pipe and a dehydrating agent outlet, characterized in that: An inner smooth reflector is provided in an annular shape on the inner wall of the main tank body. The inner smooth reflector is in the shape of an annular cylinder. A plurality of microwave generators are provided in an embedded annular equidistant array on the inner surface of the inner smooth reflector. A plurality of layers of reaction dehydrating agents are provided horizontally on the inner side of the inner smooth reflector. An upper dehydrating agent baffle, a lower dehydrating agent baffle and a fixed side baffle are provided on the outer side of each layer of reaction dehydrating agent. The microwave generators are all horizontally facing the interior of the main tank body.

2. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The main tank body is in the shape of a U-shaped tank body, the upper end surface of the main tank body is provided with a flange surface, the inner vertical surface of the main tank body is embedded with an inner smooth reflector frame, a drainage pipe is vertically provided in the center of the bottom outer side of the main tank body, and an air outlet pipe and a dehydrating agent outlet are obliquely symmetrically provided on the outer side of the bottom of the main tank body.

3. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The shape of the cover is an arc-shaped spherical cover, the bottom end surface of the cover is provided with a flange surface, the center of the upper end of the cover is vertically provided with an air inlet channel, and the upper end of the cover is obliquely provided with a dehydrating agent addition port.

4. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The inner smooth reflector frame is shaped like an annular cylindrical frame, and the surface of the inner smooth reflector frame is a highly reflective surface. The surface of the inner smooth reflector frame is provided with a plurality of generator assembly holes in an annular equidistant array. The generator assembly holes are all horizontal through holes, and microwave generators are provided inside the generator assembly holes.

5. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The microwave generator is a high-frequency and high-penetration heating microwave generator, and the generating heads of the microwave generator are all arranged inside the main tank body.

6. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent are both bracket-type circular baffle plates. Air guide holes are provided on the surfaces of the upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent. The air guide holes are dense supporting air holes. A fixed side baffle is provided in an outer ring between the upper baffle plate of the dehydrating agent and the lower baffle plate of the dehydrating agent.

7. The multi-layer microwave dehydration reactor structure for hydrogen purification according to claim 1, characterized in that: The fixed side baffle is in the shape of an annular plate or an annular net, and the outer surface of the fixed side baffle is a highly reflective surface.

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