CN219174636U

CN219174636U - Dryer regenerative heater for electrolytic water hydrogen production equipment

Info

Publication number: CN219174636U
Application number: CN202223290362.8U
Authority: CN
Inventors: 乔传宝; 尹淑彦; 张�荣
Original assignee: Shanghai Zhonghydrogen New Energy Technology Co ltd
Current assignee: Shanghai Zhonghydrogen New Energy Technology Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-06-13
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a dryer regeneration heater for electrolytic water hydrogen production equipment, and relates to the technical field of electrolytic water hydrogen production, wherein a dryer regeneration heating device comprises an oil tank, a peristaltic pump and a catalytic heater; the catalytic heater comprises a cylinder, a catalyst carrier, an air inlet pipe, an air outlet pipe and a fan, wherein the catalyst carrier is positioned in the cylinder, an air outlet of the fan is connected with an inlet end of the air inlet pipe, an outlet end of the air inlet pipe is connected with one end of the catalyst carrier, and the other end of the catalyst carrier is connected with the air outlet pipe; the peristaltic pump is provided with an oil inlet pipe and an oil outlet pipe, and the oil outlet pipe is inserted into the air inlet pipe. According to the utility model, methanol is used as fuel, flameless catalytic combustion is carried out on the methanol and the oxygen in the catalytic heater, a large amount of heat is released, the temperature is controllable, and the methanol and the oxygen are used as heat required by the regeneration of the dryer, so that the electric energy consumption is low; the peristaltic pump inputs methanol to the catalytic heater through the oil outlet pipe, and the front oil pipe of the oil outlet pipe surrounds the outer wall of the hydrogen supply pipeline, exchanges heat with hydrogen in the hydrogen supply pipeline, and can cool the hydrogen.

Description

Dryer regenerative heater for electrolytic water hydrogen production equipment

Technical Field

The utility model relates to the technical field of water electrolysis hydrogen production equipment, in particular to a dryer regeneration heater for water electrolysis hydrogen production equipment, which realizes desiccant regeneration.

Background

The hydrogen producing process with water as material includes introducing DC power into electrolytic tank filled with potassium hydroxide or sodium hydroxide, electrochemical reaction of water molecule on electrode to decompose into hydrogen and oxygen, and electrolysis to obtain hydrogen containing trace oxygen and water vapor, which is first deoxidized and then dried to obtain high purity hydrogen. After the drying tower runs for a long time, the drying tower reaches an adsorption saturation state, and the moisture in the drying tower needs to be removed, so that the drying agent is regenerated. The heat required by the regeneration of the common drying agent adopts electric heating, and the energy consumption is higher.

The utility model of China patent application No. 202210868259.2 discloses a regeneration system and a regeneration method of an adsorbent for producing hydrogen by electrolyzing water, wherein the regeneration system comprises a plurality of drying towers and inert gas inlets; each drying tower is provided with an air inlet pipeline and an air outlet pipeline respectively, the inert gas inlet is communicated with the air inlet pipeline of each drying tower through a first pipeline and a second pipeline, the first pipeline is provided with a heater or the inside of each drying tower is provided with a heater, and the second pipeline is provided with a heat exchanger. The heat source for regeneration of the desiccant in this patent is a heater.

The utility model patent in China with the application number of 202021406993.X discloses a heat exchange system of an electrolytic water hydrogen production system, which comprises a hydrogen production system, a hydrogen cooling device, a deoxidizing device and a drying device which are sequentially connected, wherein heat generated by operation in the electrolytic water hydrogen storage system is recovered into a drying agent regeneration process in the drying device for heating, so that consumption of independently setting electric energy is omitted, and heat is recovered and utilized. However, the heat recovered in this patent is difficult to reach the high temperature of dry instant regeneration.

The utility model patent of China with the application number of 202122641908.9 discloses a hydrogen purification system and an electrolyzed water hydrogen production system, which comprises three dryers, wherein the three dryers share a regeneration circulation module, the number of heaters and coolers is reduced, and a first gas heat exchanger is arranged in the regeneration circulation system, so that low-temperature regenerated hydrogen before regeneration and regenerated high-temperature regenerated tail gas can be subjected to heat exchange, the waste heat of the high-temperature regenerated tail gas can be fully utilized, and the power consumption of a subsequent heater and a subsequent cooler can be obviously reduced. The three dryers are supplied with heat by one heater, and a large amount of electric energy is wasted.

In view of this, there is a need to develop a new dryer regenerative heater in view of the above problems.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a dryer regeneration heater for an electrolytic water hydrogen production device, which uses methanol catalytic combustion as a heat source to supply heat required by desiccant regeneration.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the dryer regeneration heater for the electrolytic water hydrogen production equipment comprises an electrolytic tank, a hydrogen supply pipeline and a dryer, wherein a hydrogen outlet of the electrolytic tank is connected with the hydrogen supply pipeline, the hydrogen supply pipeline is connected with the dryer, the dryer regeneration heater comprises an oil tank, a peristaltic pump and a catalytic heater, and methanol is contained in the oil tank;

the catalytic heater comprises a cylinder, a catalyst carrier coated with a methanol combustion catalyst, an air inlet pipe, an air outlet pipe and a fan, wherein the catalyst carrier is positioned in the cylinder, two end parts of the cylinder are respectively provided with round openings, the air inlet pipe and the air outlet pipe are respectively inserted into the two round openings of the cylinder, the fan is positioned outside the cylinder, an air outlet of the fan is connected with an inlet end of the air inlet pipe, an outlet end of the air inlet pipe is connected with one end of the catalyst carrier, and the other end of the catalyst carrier is connected with an inlet end of the air outlet pipe;

the peristaltic pump is provided with an oil inlet pipe and an oil outlet pipe, the oil inlet pipe is connected with the oil tank, and the oil outlet pipe is inserted into the air inlet pipe.

By adopting the technical scheme, the peristaltic pump is used for inputting methanol into the catalyst carrier, the fan is used for inputting air into the catalyst carrier, the methanol and the oxygen generate flameless catalytic combustion reaction on the methanol combustion catalyst in the catalyst carrier, a large amount of heat is released, and the air outlet pipe outputs hot air to the drying tower to supply heat for the regeneration of the drying agent in the drying tower. When the fan and the peristaltic pump work, only a small amount of electric power is needed, so that the overall energy consumption of the water electrolysis hydrogen production equipment can be reduced.

Preferably, the oil outlet pipe comprises a front oil pipe and a rear oil pipe, wherein two ends of the front oil pipe are respectively connected with the peristaltic pump and the rear oil pipe, the front oil pipe spirally surrounds the outer wall of the hydrogen supply pipeline, the rear oil pipe spirally surrounds the outer wall of the catalyst carrier, and the rear oil pipe is inserted into the air inlet pipe.

Through adopting above-mentioned technical scheme, at first, peristaltic pump is followed advance oil pipe with the methyl alcohol in the oil tank and is drawn into preceding oil pipe from the oil feed pipe, the temperature of electrolysis trough output hydrogen is about 65-85 ℃, because preceding oil pipe encircles on the outer wall of hydrogen supply pipeline, the hydrogen supply pipeline can heat the methyl alcohol in preceding oil pipe and the preceding oil pipe, then high temperature methyl alcohol is inputed in the back oil pipe, back oil pipe can preheat the catalyst carrier, back oil pipe is inputed the air-supply line with high temperature methyl alcohol again, the fan starts, with methyl alcohol and air blow into in the catalyst carrier, methyl alcohol takes place flameless catalytic combustion reaction with oxygen on the catalyst carrier, release heat.

Preferably, the three-way pipe comprises a return pipe and a three-way pipe, wherein one end of the return pipe is connected with a first joint of the three-way pipe, the other end of the return pipe is connected with an oil tank, a second joint and a third joint of the three-way pipe are respectively connected with a front oil pipe and a rear oil pipe, a first valve is arranged on the return pipe, and a second valve is arranged on the rear oil pipe.

Through adopting above-mentioned technical scheme, when the desicator does not need dry regeneration, catalytic heater does not work, and the hydrogen that the electrolysis trough produced still needs the condensation, and at this moment, the second valve is closed, opens first valve, and the peristaltic pump starts the back, in the methanol pumping preceding oil pipe of oil tank, the hydrogen condensation cooling in the hydrogen supply pipeline is to the methanol in preceding oil pipe, and in the methanol in preceding oil pipe was input back to the back flow through first valve, in the follow back flow returns the oil tank again.

Preferably, the catalyst carrier is a cylinder, the catalyst carrier and the cylinder are coaxially arranged, a plurality of hollow flow passages are arranged in the catalyst carrier, and a methanol combustion catalyst is coated in a plurality of the hollow flow passages.

By adopting the technical scheme, the air and the methanol which are input into the catalyst carrier flow through a plurality of hollow flow channels, the contact area between the methanol, the oxygen and the catalyst carrier is large, the reaction is more sufficient, and the released heat is high.

Preferably, two catalyst carriers are arranged in the cylinder, and a space is arranged between the two catalyst carriers.

By adopting the technical scheme, the space between the two catalyst carriers is used for disturbing the air flow of the methanol and the air; if the tail gas after the reaction of the former catalyst carrier contains a small amount of unreacted methanol, the unreacted methanol is input into the latter catalyst carrier, the gas flow is disturbed by the interval between the two catalyst carriers, and the methanol and the oxygen are more likely to collide with the inner walls of a plurality of hollow flow channels, so that the reaction rate of the methanol is improved.

Preferably, one end of the air outlet pipe far away from the cylinder is provided with a pipe joint, the air outlet pipe is connected with one end of a hot gas pipeline through the pipe joint, and the other end of the hot gas pipeline is connected with the dryer.

By adopting the technical scheme, as the pipe diameter of the air outlet pipe is larger than that of the hot gas pipeline, after the pipe joint is required to be changed in diameter, the air outlet pipe is communicated with the hot gas pipeline.

Compared with the related art, the dryer regeneration heater for the water electrolysis hydrogen production equipment has the following beneficial effects:

1. the utility model takes methanol as fuel, methanol and oxygen generate flameless catalytic combustion in the catalytic heater, release a large amount of heat, have controllable temperature, and have little electric energy consumption as the heat required by the regeneration of the dryer.

2. According to the peristaltic pump disclosed by the utility model, methanol is input into the catalytic heater through the oil outlet pipe, the front oil pipe of the oil outlet pipe surrounds the outer wall of the hydrogen supply pipeline, so that the condensation effect on hydrogen in the hydrogen supply pipeline is achieved, the hydrogen can be cooled without using a condenser, the rear oil pipe of the oil outlet pipe surrounds the outer wall of the catalyst carrier, the catalyst carrier can be preheated, and the catalytic efficiency of the catalyst carrier is improved.

3. Through being equipped with back flow and three-way pipe, when catalytic heater is inoperative, first valve is opened, and the second valve is closed, and the peristaltic pump draws in preceding oil pipe with the methyl alcohol, from back flow back to in the oil tank again, can be to the hydrogen condensation in the hydrogen supply pipeline.

Drawings

FIG. 1 is a perspective view of a dryer regenerative heater for an electrolyzed water hydrogen plant;

FIG. 2 is a front view of a dryer regeneration heater for use in an electrolyzed water hydrogen plant;

FIG. 3 is a cross-sectional view taken along the direction B-B in FIG. 2;

fig. 4 is a schematic diagram of the structure of a dryer regenerative heater for an electrolytic water hydrogen plant.

Reference numerals: 1. an electrolytic cell; 2. a hydrogen supply line; 3. a dryer; 4. an oil tank; 5. a peristaltic pump; 51. an oil inlet pipe; 52. an oil outlet pipe; 521. a front oil pipe; 522. a rear oil pipe; 523. a second valve; 53. a return pipe; 531. a first valve; 54. a three-way pipe; 6. a catalytic heater; 61. a cylinder; 62. a catalyst carrier; 63. an air inlet pipe; 64. an air outlet pipe; 641. a tube interface; 65. a blower; 7. a hot gas line; 8. a controller; 9. and a reversing valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and examples.

It should be noted that in the description of the present utility model, the terms "mounted," "disposed," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, the connection can be fixed connection, detachable connection or integral connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a dryer regeneration heater for an electrolyzed water hydrogen production apparatus, which is used for supplying heat to a dryer 3, wherein the electrolyzed water hydrogen production apparatus is provided with an electrolyzer 1, a hydrogen supply pipeline 2 and the dryer 3, a hydrogen outlet of the electrolyzer 1 is connected with the hydrogen supply pipeline 2, the hydrogen supply pipeline 2 is connected with the dryer 3, a drying agent is arranged in the dryer 3, hydrogen generated by the electrolyzer 1 is conveyed into the dryer 3 through the hydrogen supply pipeline 2, and the dryer 3 dehumidifies the hydrogen to obtain dry hydrogen. The drying agent regeneration heat supply device comprises an oil tank 4, a peristaltic pump 5 and a catalytic heater 6, wherein methanol is contained in the oil tank 4, the peristaltic pump 5 is used for pumping the methanol, the catalytic heater 6 uses the methanol as fuel for catalyzing and heating, and the generated heat is used for supplying heat to the dryer 3.

Further, the catalytic heater 6 includes a cylinder 61, a catalyst carrier 62, an air inlet pipe 63, an air outlet pipe 64 and a fan 65, the inside of the cylinder 61 is a cylindrical cavity, a methanol combustion catalyst is coated in the catalyst carrier 62, the catalyst carrier 62 is arranged in the cylinder 61, both ends of the cylinder 61 are respectively provided with a circular opening, the air inlet pipe 63 and the air outlet pipe 64 are respectively inserted into the two circular openings, and the air inlet pipe 63, the air outlet pipe 64 and the cylinder 61 are in sealing connection. The fan 65 is located outside one end of the cylinder 61, the air outlet of the fan 65 is connected with the inlet end of the air inlet pipe 63, the outlet end of the air inlet pipe 63 is connected with one end of the catalyst carrier 62, and the other end of the catalyst carrier 62 is connected with the inlet end of the air outlet pipe 64. The air output from the blower 65 flows through the air inlet pipe 63, the catalyst carrier 62 and the air outlet pipe 64 in order, and is used for inputting air into the catalyst carrier 62. The outlet end of the air outlet pipe 64 is connected to the dryer 3, and hot air is supplied to the dryer 3 for regeneration heat supply of the drying agent in the dryer 3.

The peristaltic pump 5 is used for supplying methanol to the catalytic heater 6, the peristaltic pump 5 is provided with an oil inlet pipe 51 and an oil outlet pipe 52, one end of the oil inlet pipe 51, which is far away from the peristaltic pump 5, is connected with the oil tank 4 and is used for extracting the methanol in the oil tank 4, one end of the oil outlet pipe 52, which is far away from the peristaltic pump 5, is inserted into the air inlet pipe 63 and is used for inputting the methanol into the air inlet pipe 63, and air output by the fan 65 is used for blowing the methanol into the catalyst carrier 62.

The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the embodiments and the protection scope of the present utility model.

The present utility model has the following embodiments based on the above description:

further, the oil outlet pipe 52 includes a front oil pipe 521 and a rear oil pipe 522, one end of the front oil pipe 521 is connected to the peristaltic pump 5, the other end of the front oil pipe 521 is connected to one end of the oil outlet pipe 52, and the other end of the oil outlet pipe 52 penetrates the cylinder 61 and is inserted into the air inlet pipe 63. The front oil pipe 521 is spirally wound on the outer wall of the hydrogen supply pipeline 2, the rear oil pipe 522 is spirally wound on the outer wall of the catalyst carrier 62, the temperature output by the electrolytic tank 1 is about 65-85 ℃, the hydrogen in the hydrogen supply pipeline 2 exchanges heat with the methanol in the front oil pipe 521, the hydrogen is condensed and cooled, the methanol is heated to form high-temperature methanol, the methanol is input into the rear oil pipe 522, the rear oil pipe 522 preheats the catalyst carrier 62, the temperature of the catalyst carrier 62 is increased, and the catalytic efficiency of the catalyst carrier 62 is greatly improved.

The three-way pipe 54 is provided with a first joint, a second joint and a third joint, one end of the three-way pipe 54 is connected with the first joint, the other end of the three-way pipe 53 is connected with the oil tank 4, the second joint and the third joint are respectively connected with the front oil pipe 521 and the rear oil pipe 522, a first valve 531 is arranged on the three-way pipe 53, and a second valve 523 is arranged on the rear oil pipe 522. When the catalytic heater 6 works, the second valve 523 is opened, the first valve 531 is closed, and methanol is input into the catalytic heater 6; when the catalytic heater 6 does not work and still needs to condense the hydrogen supply pipeline 2, the first valve 531 is opened, the second valve 523 is closed, and after the methanol in the front oil pipe 521 exchanges heat with the hydrogen in the hydrogen supply pipeline 2, the methanol flows into the return pipe 53 and flows back into the oil tank 4 from the return pipe 53, so that continuous condensation of the hydrogen supply pipeline 2 is realized.

In addition, the catalyst carrier 62 is cylindrical, and a plurality of hollow flow passages and a plurality of hollow channels are arranged in the catalyst carrier 62The flow channels all penetrate from one end of the catalyst carrier 62 to the other end, and a plurality of hollow flow channels are internally coated with a methanol combustion catalyst, wherein the methanol combustion catalyst is Al ₂ O ₃ The balls carry 1% by mass of metal catalyst particles; al (Al) ₂ O ₃ The ball is a ball star structure made of alumina as a matrix, and platinum elements with the mass fraction of 1% are mixed to promote the catalytic combustion of methanol.

When one catalyst carrier 62 is insufficient to react the input methanol completely, two catalyst carriers 62 are arranged in the cylinder 61, and a space is reserved between the two catalyst carriers 62, so that the space can disturb the air flow, methanol and air do not need to move, methanol and oxygen are easier to collide with the inner wall of the hollow flow passage, the contact probability with the methanol combustion catalyst is improved, and the catalytic combustion efficiency is improved.

Further, a pipe joint 641 is provided at an end of the air outlet pipe 64 away from the cylinder 61, the air outlet pipe 64 is connected to one end of the hot gas line 7 through the pipe joint 641, and the other end of the hot gas line 7 is connected to the dryer 3; since the pipe diameter of the air outlet pipe 64 is larger than the pipe diameter of the hot gas pipeline 7, the pipe joint 641 is required to be changed in diameter, and then the air outlet pipe 64 is connected with the hot gas pipeline 7.

Further optimizing the above embodiment, as shown in fig. 4, the electrolytic water hydrogen production device generally has three dryers 3, so as to implement alternate dehumidification, regeneration and cooling, one dryer 3 dehumidifies hydrogen, one dryer 3 regenerates the drying agent in the dryer 3, and one dryer 3 cools after regeneration; the inlets of the three dryers 3 are connected with air inlet pipes, the other end of the hot gas pipeline 7 is connected with the air inlet pipes of the three dryers 3 through a reversing valve 9, and the hot gas pipeline 7 is controlled to be communicated with one dryer 3 through the reversing valve 9.

The outer wall of the dryer 3 is sleeved with a sleeve (not shown in the figure), an air heating cavity is formed between the sleeve and the outer wall of the dryer 3, an inlet is formed in the lower end of the sleeve, an outlet is formed in the upper end of the sleeve, an air inlet pipe of the dryer 3 is connected with the inlet, and hot air generated by the catalytic heater 6 is input into the air heating cavity to heat the dryer 3 from the outside. In other embodiments, the outer wall of the dryer 3 has no sleeve, and the hot air generated by the catalytic heater 6 is introduced into the dryer 3 from the air inlet pipe.

The peristaltic pump is characterized by further comprising a controller 8, wherein the fan 65, the first valve 531, the second valve 523, the reversing valve 9 and the peristaltic pump 5 are all in circuit connection with the controller 8, and the controller 8 is used for controlling the fan 65, the first valve 531, the second valve 523, the reversing valve 9 and the peristaltic pump 5 to work.

Further, the catalyst support 62 may be formed of cordierite honeycomb ceramics or metal.

The working principle of the utility model is described as follows: when the dryer 3 needs heat to regenerate the drying agent, the catalytic heater 6 is started, the peristaltic pump 5 pumps the methanol in the oil tank 4 into the front oil pipe 521, the methanol in the front oil pipe 521 exchanges heat with the hydrogen in the hydrogen supply pipeline 2, the temperature of the hydrogen is reduced, the temperature of the methanol is increased, the methanol is input into the rear oil pipe 522, the methanol in the rear oil pipe 522 exchanges heat with the catalyst carrier 62 and is input into the air inlet pipe 63, the fan 65 blows air into the air inlet pipe 63, the air blows the methanol into the catalyst carrier 62 together, the methanol and the oxygen perform catalytic combustion reaction on the methanol combustion catalyst in the catalyst carrier 62, the heat is released, high-temperature air is formed, the high-temperature air enters the sleeve from the air outlet pipe 64, the hot air pipeline 7 and the air inlet pipe, the air heating cavity heats the dryer 3 from the outside, and the regeneration of the drying agent is realized. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A dryer regeneration heater for an electrolyzed water hydrogen production plant, the electrolyzed water hydrogen production plant is provided with an electrolytic tank (1), a hydrogen supply pipeline (2) and a dryer (3), a hydrogen outlet of the electrolytic tank (1) is connected with the hydrogen supply pipeline (2), and the hydrogen supply pipeline (2) is connected with the dryer (3), characterized in that the dryer regeneration heater comprises an oil tank (4), a peristaltic pump (5) and a catalytic heater (6);

the catalytic heater (6) comprises a cylinder (61), a catalyst carrier (62) coated with a methanol combustion catalyst, an air inlet pipe (63), an air outlet pipe (64) and a fan (65), wherein the catalyst carrier (62) is positioned in the cylinder (61), round openings are formed in two end parts of the cylinder (61), the air inlet pipe (63) and the air outlet pipe (64) are respectively inserted into the two round openings of the cylinder (61), the fan (65) is positioned outside the cylinder (61), an air outlet of the fan (65) is connected with an inlet end of the air inlet pipe (63), an outlet end of the air inlet pipe (63) is connected with one end of the catalyst carrier (62), and the other end of the catalyst carrier (62) is connected with an inlet end of the air outlet pipe (64);

the peristaltic pump (5) is provided with an oil inlet pipe (51) and an oil outlet pipe (52), the oil inlet pipe (51) is connected with the oil tank (4), and the oil outlet pipe (52) is inserted into the air inlet pipe (63).

2. The dryer regeneration heater for a water electrolysis hydrogen plant according to claim 1, wherein the oil outlet pipe (52) comprises a front oil pipe (521) and a rear oil pipe (522), both ends of the front oil pipe (521) are respectively connected with the peristaltic pump (5) and the rear oil pipe (522), the front oil pipe (521) spirally surrounds the outer wall of the hydrogen supply pipeline (2), the rear oil pipe (522) spirally surrounds the outer wall of the catalyst carrier (62), and the rear oil pipe (522) is inserted into the air inlet pipe (63).

3. The dryer regeneration heater for water electrolysis hydrogen production equipment according to claim 2, further comprising a return pipe (53) and a three-way pipe (54), wherein one end of the return pipe (53) is connected with a first joint of the three-way pipe (54), the other end of the return pipe (53) is connected with the oil tank (4), a second joint and a third joint of the three-way pipe (54) are respectively connected with a front oil pipe (521) and a rear oil pipe (522), a first valve (531) is arranged on the return pipe (53), and a second valve (523) is arranged on the rear oil pipe (522).

4. The dryer regeneration heater for a water electrolysis hydrogen plant according to claim 1, wherein the catalyst carrier (62) is cylindrical, a plurality of hollow flow channels are provided in the catalyst carrier (62), and a methanol combustion catalyst is coated in each of the plurality of hollow flow channels.

5. A dryer regeneration heater for a water electrolysis hydrogen plant according to claim 4, wherein there are two catalyst carriers (62) within the cylinder (61), with a spacing between the two catalyst carriers (62).

6. Dryer regeneration heater for a water electrolysis hydrogen plant according to claim 1, characterized in that the end of the air outlet pipe (64) remote from the cylinder (61) is provided with a pipe connection (641), the air outlet pipe (64) is connected with one end of a hot gas pipe (7) through the pipe connection (641), and the other end of the hot gas pipe (7) is connected with the dryer (3).