CN220485336U - Hydrogen purification system and hydrogen production system - Google Patents

Abstract

The utility model relates to the field of hydrogen production, and provides a hydrogen purification system and a hydrogen production system. The hydrogen purification system includes: a deoxidizing module; at least three dryers, each dryer is provided with a first inlet and outlet connected with the deoxidizing module, a second inlet and outlet connected with the discharging branch, and a water absorbing structure and a first heating device which are sequentially arranged in a flow channel between the first inlet and outlet and the second inlet and outlet; the inlet end of the purging branch is connected with the discharge branch, and the outlet end of the purging branch is connected with the second inlets and outlets of all the dryers; and the two ends of the cooling branch are connected with the first inlets and outlets of all the dryers, and the cooling branch is used for cooling hydrogen. Both ends of cooling branch road all are connected with the first access of all desicators for all desicators can share a cooling branch road and cool off regeneration hydrogen, thereby reduce the quantity of cooling branch road, and then reach the effect of simplifying hydrogen purification system's structure and reducing hydrogen purification system's cost.

Description

Hydrogen purification system and hydrogen production system

Technical Field

The utility model relates to the technical field of hydrogen production, in particular to a hydrogen purification system and a hydrogen production system.

Background

The hydrogen production by water electrolysis is one of the widely used means for preparing hydrogen at the present stage, and the hydrogen generated in the hydrogen production process by water electrolysis contains trace oxygen and a large amount of water vapor, so that in order to improve the purity of the hydrogen, the hydrogen is generally required to be purified by a hydrogen purification system.

In the related art, a hydrogen purification system generally includes a deoxidizing module for removing trace oxygen from hydrogen gas and a drying module for removing moisture from hydrogen gas. In order to achieve the effect of recycling, the drying module generally comprises three dryers, one of the three dryers is in a working state, one of the three dryers is in a regeneration state, the other dryer is in a regenerated hydrogen dehumidification state, and the states of the three dryers are switched in a circulating manner. The dryer in the working state is used for drying the hydrogen discharged by the deoxidizing module, and part of the hydrogen after being dried is used as regenerated hydrogen to enter the dryer in the regeneration state for purging so as to eliminate water vapor in the dryer in the regeneration state. After being discharged from the dryer in a regeneration state, the hydrogen containing water vapor enters a corresponding cooling branch for cooling, and at the moment, part of the water vapor is condensed into water and discharged. The cooled hydrogen enters a dryer in a regenerated hydrogen dehumidification state for drying, and the dried hydrogen enters the downstream.

In the above-mentioned related art, every desicator all is equipped with corresponding cooling branch road, and every cooling branch road all is equipped with respective corresponding cooler to carry the regenerated hydrogen of steam and cool off, make the quantity of hydrogen purification system's cooler more, lead to hydrogen purification system's area big, the structure is complicated, and the cost is higher.

Disclosure of Invention

The utility model provides a hydrogen purification system and a hydrogen production system, which are used for solving or improving the defects of large occupied area, complex structure and higher cost of the hydrogen purification system caused by the fact that each dryer is provided with a corresponding cooling branch in the related technology, and realizing the effect of simplifying the structure of the hydrogen purification system.

The present utility model provides a hydrogen purification system comprising:

a deoxidizing module for eliminating oxygen in the hydrogen;

at least three dryers, each dryer is provided with a first inlet and outlet connected with the deoxidizing module, a second inlet and outlet connected with the discharging branch, and a water absorbing structure and a first heating device which are sequentially arranged in a flow channel between the first inlet and outlet and the second inlet and outlet;

the inlet end of the purging branch is connected with the discharge branch, and the outlet end of the purging branch is connected with the second inlets and outlets of all the dryers;

and the two ends of the cooling branch are connected with the first inlets and outlets of all the dryers, and the cooling branch is used for cooling hydrogen.

According to the hydrogen purification system provided by the utility model, the cooling branch comprises a first control valve, a first cooler and a second control valve which are arranged in series, the number of the first control valve and the number of the second control valve are the same as the number of the dryers, the inlet end of the cooling branch is connected with the first inlet and the first outlet of each dryer through the corresponding first control valve, and the outlet end of the cooling branch is connected with the first inlet and the second inlet of each dryer through the corresponding second control valve.

According to the hydrogen purification system provided by the utility model, the cooling branch further comprises a first gas-liquid separator, and the first gas-liquid separator is connected in series between the first cooler and the second control valve.

According to the hydrogen purification system provided by the utility model, the hydrogen purification system further comprises a regenerated hydrogen discharge branch, the outlet end of the discharge branch is provided with a discharge control valve, the first ends of the regenerated hydrogen discharge branch are connected with all the second inlets and outlets, and the second ends of the regenerated hydrogen discharge branch are connected with the outlet end of the discharge control valve.

According to the hydrogen purification system provided by the utility model, the exhaust branch further comprises a first detection device, the first detection device is arranged at the inlet end of the exhaust control valve and is used for detecting the pressure value of hydrogen, and the first detection device and the exhaust control valve are both connected with the control system of the hydrogen purification system so that the control system of the hydrogen purification system can control the opening of the purge branch and the opening of the cooling branch based on the product dew point value.

According to the hydrogen purification system provided by the utility model, the discharge branch further comprises a second detection device, the second detection device is arranged at the outlet end of the discharge branch and is used for detecting the product dew point value of hydrogen, and the second detection device, the purging branch and the cooling branch are all connected with the control system of the hydrogen purification system.

According to the hydrogen purification system provided by the utility model, the dryer further comprises a first temperature detection device, the first temperature detection device is arranged in the flow channel between the first heating device and the water absorption structure and is used for detecting the temperature value of hydrogen, and the first heating device and the first temperature detection device are both connected with the control system of the hydrogen purification system.

According to the hydrogen purification system provided by the utility model, the deoxidizing module comprises a deoxidizing device and a second cooler, wherein the deoxidizing device is provided with an air inlet, an air outlet, a second heating device and a catalyst layer, wherein the second heating device and the catalyst layer are sequentially arranged in a flow passage between the air inlet and the air outlet, the air outlet is connected with the second cooler, and the second cooler is connected with the dryer.

According to one hydrogen purification system provided by the utility model, the deoxidizing module further comprises a second gas-liquid separator, and the second gas-liquid separator is connected to the downstream of the second cooler.

The utility model also provides a hydrogen production system comprising the hydrogen purification system.

The hydrogen purification system provided by the utility model can eliminate trace oxygen in hydrogen through arranging the deoxidizing module, and can dry and dehydrate the hydrogen through arranging the dryer. By providing a purge branch, a portion of the hydrogen in the exhaust branch can be directed to the dryer in a regenerated state. The hydrogen sweeps the dryer in the regeneration state, so that the moisture in the dryer is removed, the hydrogen is discharged from the dryer in the regeneration state, the discharged hydrogen enters a cooling branch for cooling, and the moisture is condensed and separated out. And the hydrogen discharged from the cooling branch is fed into the dryer in the regenerated hydrogen dehumidification state, and is dried by the dryer in the regenerated hydrogen dehumidification state, and the dried hydrogen is discharged from the dryer in the regenerated hydrogen dehumidification state to the discharge branch.

By the arrangement, the two ends of the cooling branch are connected with the first inlets and outlets of all the dryers, so that all the dryers can share one cooling branch to cool regenerated hydrogen, the number of the cooling branches is reduced, and the effects of simplifying the structure of the hydrogen purification system and reducing the cost of the hydrogen purification system are achieved.

The hydrogen production system provided by the utility model comprises the hydrogen purification system provided by the utility model, so that all the advantages of the hydrogen purification system are simultaneously contained.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hydrogen purification system provided in some embodiments of the utility model.

Reference numerals:

1. a deoxidizing module; 101. a deoxidizer; 101-1, an air inlet; 101-2, an air outlet; 101-3, a second heating device; 101-4, a catalyst layer; 102. a second cooler; 103. a second gas-liquid separator; 2. a dryer; 201. a first access port; 202. a second inlet and outlet; 203. a water absorbing structure; 204. a first heating device; 205. a first temperature detection device; 3. a purge branch; 301. purging an air inlet valve; 4. a cooling branch; 401. a first control valve; 402. a first cooler; 403. a second control valve; 404. a first gas-liquid separator; 5. a regenerated hydrogen discharge branch; 501. a regenerated hydrogen gas discharge valve; 6. a discharge branch; 601. a discharge control valve; 602. a first detection device; 603. a second detection device; 604. a discharge valve; 7. and a feed valve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The hydrogen purification system provided in the embodiment of the present utility model is described below with reference to fig. 1.

Specifically, the hydrogen purification system includes a deoxygenation module 1, a dryer 2, a purge leg 3, and a cooling leg 4.

Wherein the deoxidizing module 1 is used for eliminating oxygen in hydrogen. For example, the deoxidizing module 1 may react a trace amount of oxygen in the hydrogen gas with the hydrogen gas to generate water under the action of a catalyst by using the principle of oxidation-reduction reaction.

The number of the dryers 2 is at least three, and each dryer 2 is provided with a first inlet and outlet 201 connected with the deoxidizing module 1, a second inlet and outlet 202 connected with the discharging branch 6, and a water absorbing structure 203 and a first heating device 204 which are sequentially arranged in a flow channel between the first inlet and outlet 201 and the second inlet and outlet 202. Alternatively, the water absorbing structure 203 may be a molecular sieve packed in the dryer 2. In the case where the number of the dryers 2 is three, when the hydrogen purification system is operated, one of the three dryers 2 is in an operating state, one is in a regenerated state, and the other is in a regenerated hydrogen dehumidified state. When the number of the dryers 2 is three or more, at least one of the number of the dryers 2 in the operating state, the number of the dryers 2 in the regenerated state, and the number of the dryers 2 in the regenerated hydrogen dehumidification state is two when the hydrogen purification system is operated. Optionally, the exhaust branch 6 is used for connection to a downstream hydrogen treatment system.

The inlet end of the purge branch 3 is connected to the exhaust branch 6, and the outlet end of the purge branch 3 is connected to the second inlets and outlets 202 of all the dryers 2, so that the purge branch 3 can introduce the hydrogen of the exhaust branch 6 into any one of the dryers 2.

The cooling branch 4 is used for cooling the hydrogen. Both ends of the cooling branch 4 are connected to the first inlets and outlets 201 of all the dryers 2 so that the hydrogen discharged from the first inlet and outlet 201 of any one dryer 2 can be cooled by the cooling branch 4 and then enter the other dryer 2.

The operation of the hydrogen purification system provided in this embodiment will be described below with reference to fig. 1, in which three dryers 2 in fig. 1 are defined as a first dryer 2, a second dryer 2 and a third dryer 2 in this order from left to right, and the first dryer 2 is in operation, the second dryer 2 is in regeneration, and the third dryer 2 is in regenerated hydrogen dehumidification, for the sake of clarity of description. The specific operation process is as follows:

the hydrogen to be purified first enters the deoxidizing module 1, and trace oxygen in the hydrogen is eliminated by the deoxidizing module 1. The hydrogen discharged from the deoxidizing module 1 enters the first dryer 2 through the first inlet and outlet 201 of the first dryer 2, and is dried and dehydrated by the first dryer 2. The hydrogen discharged through the second inlet 202 of the first dryer 2 enters the discharge branch 6 and is conveyed downstream by the discharge branch 6. Wherein a portion of the hydrogen exiting the branch 6 enters the purge branch 3 and is directed by the purge branch 3 to the second inlet 202 of the second dryer 2. The hydrogen gas entering the second dryer 2 is heated by the first heating device 204, flows through the water absorbing structure 203 to dry and regenerate the water absorbing structure 203, so that the water in the water absorbing structure 203 is removed. The moisture carried by the hydrogen in the second dryer 2 is discharged from the first inlet and outlet 201 of the second dryer 2 and enters the cooling branch 4 for cooling, and the moisture carried by the hydrogen is condensed and separated out in the cooling process. The hydrogen discharged through the cooling branch 4 enters the third dryer 2 from the first inlet and outlet 201 of the third dryer 2, is dried by the third dryer 2, and is discharged to the discharge branch 6 from the second inlet and outlet 202 of the third dryer 2. When the first dryer 2 cannot meet the drying requirement for hydrogen, then the three dryers 2 perform state switching, specifically, the first dryer 2 is switched to a regeneration state, the second dryer 2 is switched to a regenerated hydrogen dehumidification state, and the third dryer 2 is switched to an operation state.

By means of the arrangement, two ends of the cooling branch 4 are connected with the first inlets and outlets 201 of all the dryers 2, so that all the dryers 2 can share one cooling branch 4 to cool regenerated hydrogen, the number of the cooling branches 4 is reduced, and the effects of simplifying the structure of the hydrogen purification system and reducing the cost of the hydrogen purification system are achieved.

In some embodiments provided by the present utility model, the cooling branch 4 comprises a first control valve 401, a first cooler 402 and a second control valve 403 arranged in series. The number of the first control valves 401 and the second control valves 403 is the same as that of the dryers 2, and the first control valves 401 and the second control valves 403 are in one-to-one correspondence with the dryers 2. The inlet end of the cooling branch 4 is connected to the first inlet and outlet 201 of each dryer 2 via a respective first control valve 401, and the outlet end of the cooling branch 4 is connected to the first inlet and outlet 201 of each dryer 2 via a respective second control valve 403. Alternatively, first cooler 402 is a shell-and-tube heat exchanger, a double-tube heat exchanger, or a plate heat exchanger.

In this embodiment, during the operation of the hydrogen purification system, the first control valve 401 corresponding to the dryer 2 in the regenerated state is opened, the second control valve 403 corresponding to the dryer 2 in the regenerated hydrogen dehumidified state is opened, and the remaining first control valve 401 and second control valve 403 are closed. This allows the hydrogen gas with water vapor discharged from the dryer 2 in the regenerated state to pass through the first cooler 402 to be cooled, and then enter the dryer 2 in the regenerated hydrogen dehumidification state. Optionally, the first control valve 401 and the second control valve 403 are both connected to a control system of the hydrogen purification system, so that the opening and closing of both the first control valve 401 and the second control valve 403 are controlled by the control system.

In some embodiments provided by the present utility model, the cooling branch 4 further comprises a first gas-liquid separator 404. The first gas-liquid separator 404 is connected in series between the first cooler 402 and the second control valve 403, and the first gas-liquid separator 404 is used for separating the hydrogen and the water vapor discharged from the first cooler 402.

In some embodiments provided by the present utility model, the hydrogen purification system further comprises a regenerated hydrogen vent bypass 5. The outlet end of the exhaust branch 6 is provided with an exhaust control valve 601, the first end of the regenerated hydrogen exhaust branch 5 is connected with all the second inlets and outlets 202, and the second end of the regenerated hydrogen exhaust branch 5 is connected with the outlet end of the exhaust control valve 601.

In the present embodiment, the second inlet 202 of the dryer 2 in the dehumidified state of the regenerated hydrogen gas is communicated with the outlet end of the discharge control valve 601 through the regenerated hydrogen gas discharge branch 5, so that the regenerated hydrogen gas can be introduced into the discharge branch 6 through the regenerated hydrogen gas discharge branch 5. By arranging the discharge control valve 601, on one hand, the pressure of hydrogen in the hydrogen purification system can be regulated so that the pressure of the hydrogen purification system can be kept stable, and on the other hand, the pressure difference between the product hydrogen and the regenerated hydrogen can be balanced so as to ensure that the regenerated hydrogen can be smoothly discharged.

Alternatively, the regenerated hydrogen discharge branch 5 includes regenerated hydrogen discharge valves 501, and the number of the regenerated hydrogen discharge valves 501 is the same as and one-to-one corresponding to the number of the dryers 2. I.e. the regenerated hydrogen discharge branch 5 is connected to each dryer 2 through a respective regenerated hydrogen discharge valve 501. During normal operation of the hydrogen purification system, the regenerated hydrogen discharge valve 501 corresponding to the dryer 2 in the dehumidified state of the regenerated hydrogen is opened, and the remaining regenerated hydrogen discharge valves 501 are closed. Alternatively, the regenerated hydrogen discharge valve 501 may be connected to a control system of the hydrogen purification system to control the opening and closing of the regenerated hydrogen discharge valve 501 by the control system.

In some embodiments provided by the present utility model, purge branch 3 comprises purge inlet valve 301. The number of purge inlet valves 301 is the same as and corresponds one to the number of dryers 2, and purge branches 3 are connected to each dryer 2 by means of respective purge inlet valves 301. During purging, the purge inlet valve 301 corresponding to the dryer 2 in the regenerated state is opened, and the remaining purge inlet valves 301 are closed, so that the hydrogen of the exhaust branch 6 passes through the purge branch 3 into the dryer 2 in the regenerated state. Alternatively, the purge inlet valve 301 may be connected to a control system of the hydrogen purification system, so that the control system controls the opening and closing of the purge inlet valve 301.

In some embodiments of the present utility model, the exhaust branch 6 further includes a first detecting device 602, where the first detecting device 602 is disposed at an inlet end of the exhaust control valve 601 and is used to detect a pressure value of the hydrogen, and both the first detecting device 602 and the exhaust control valve 601 are connected to a control system of the hydrogen purification system. Alternatively, the first detection device 602 is provided as a pressure transmitter or a pressure sensor. The control system controls the opening degree of the discharge control valve 601 based on the pressure value.

Specifically, the control system controls the opening degree of the discharge control valve 601 to be increased when the determined pressure value is higher than the target pressure value, and controls the opening degree of the discharge control valve 601 to be decreased when the determined pressure value is lower than the target pressure value. It should be noted that, the control system is generally provided with a comparison module for comparing the magnitude of the pressure value with the target pressure value, and can output a high level or a low level based on the difference of the comparison results for controlling the opening degree of the discharge control valve 601, and thus, no improvement of the control system itself is involved.

By such arrangement, the opening degree of the discharge control valve 601 can be automatically adjusted, so that the pressure of the hydrogen purification system is kept stable, and the regenerated hydrogen can be ensured to be smoothly discharged.

In some embodiments provided by the present utility model, the discharge branch 6 further comprises a second detection means 603, the second detection being arranged at the outlet end of the discharge branch 6, e.g. the second detection means 603 being arranged at the outlet end of the discharge control valve 601. The second detecting device 603 is used for detecting the product dew point value of the hydrogen. For example, the second detection device 603 may be a dew point meter. The second detection device 603, the purging branch 3 and the cooling branch 4 are all connected with a control system of the hydrogen purification system, and the control system controls the opening and closing of the purging branch 3 and the opening and closing of the cooling branch 4 based on the dew point value of the product.

Specifically, when the control system determines that the product dew point value is higher than the target dew point value, it indicates that the dryer 2 currently in operation cannot meet the drying requirement for hydrogen, so the control system controls the purge branch 3 to be opened and controls the cooling branch 4 to be opened so as to regenerate the dryer 2. It should be noted that the control system is generally provided with a comparison module, which can be used to compare the product dew point value with the target dew point value, and can output a high level or a low level based on the comparison result, so as to control the opening and closing of the control valves in the two branches of the purge branch 3 and the cooling branch 4, and thus, no improvement of the control system itself is involved.

So set up, hydrogen purification system can confirm whether to open and sweep branch road 3 and cooling branch road 4 based on the product dew point value of the hydrogen of exhaust branch road 6 exhaust voluntarily to sweep the desicator 2 that is in operating condition, so need not manual intervention, thereby make hydrogen purification system's degree of automation higher.

In some embodiments provided by the present utility model, the dryer 2 further comprises a first temperature detection device 205, for example the first temperature detection device 205 may be a temperature sensor. The first temperature detecting means 205 is provided in the flow path between the first heating means 204 and the water absorbing structure 203, and is used to detect the temperature value of the hydrogen gas. The first heating device 204 and the first temperature detecting device 205 are both connected to a control system of the hydrogen purification system. The control system controls the power of the first heating device 204 based on the temperature value. The first heating device 204 is an electric heater.

By this arrangement, in the process of regenerating the dryer 2 in a state, it is possible to ensure that the temperature of the hydrogen gas satisfies the regeneration requirement of the dryer 2.

In some embodiments provided by the present utility model, the deoxygenation module 1 includes a deoxygenator 101 and a second cooler 102. The deoxidizer 101 is provided with an air inlet 101-1, an air outlet 101-2, a second heating device 101-3 and a catalyst layer 101-4 which are sequentially disposed in a flow path between the air inlet 101-1 and the air outlet 101-2. The air outlet 101-2 is connected to a second cooler 102, and the second cooler 102 is connected to the dryer 2.

In this embodiment, in the process of deoxidizing hydrogen, hydrogen enters the deoxidizer 101 through the air inlet 101-1, is heated by the second heating device 101-3, flows through the catalyst layer 101-4, reacts with a small amount of oxygen to form water under the action of the catalyst, and the deoxidized hydrogen is discharged from the air outlet 101-2 and enters the second cooler 102 for cooling.

In some embodiments provided by the present utility model, the deoxidizing module 1 further comprises a second gas-liquid separator 103, the second gas-liquid separator 103 being connected downstream of the second cooler 102 for separating the hydrogen gas and the water vapor discharged from the second cooler 102.

In some embodiments of the present utility model, the hydrogen purification system further comprises a feeding valve 7, the number of feeding valves 7 is the same as and corresponds to the number of dryers 2, and the deoxidizing modules 1 are connected to the first inlet and outlet 201 of each dryer 2 through the corresponding feeding valve 7. During operation, the feed valve 7 corresponding to the dryer 2 in operation is opened and the remaining feed valves 7 are closed so that the hydrogen gas discharged from the deoxygenation module 1 can enter the dryer in operation.

In some embodiments provided by the present utility model, the discharge branch 6 further includes discharge valves 604, and the number of the discharge valves 604 is the same as and corresponds to the number of the dryers 2 one by one, and the discharge branch 6 is connected to the second inlet 202 of each dryer 2 through the corresponding discharge valve 604. During operation, the discharge valve 604 corresponding to the dryer 2 in operation is opened to introduce the dried hydrogen into the discharge branch 6, and the remaining discharge valves 604 are closed.

The embodiment of the utility model also provides a hydrogen production system.

Specifically, the hydrogen production system includes a hydrogen purification system as described above.

It should be noted that the hydrogen production system includes the hydrogen purification system, and all the advantages of the hydrogen purification system are also included, which will not be described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A hydrogen purification system, comprising:

a deoxidizing module (1) for eliminating oxygen in the hydrogen;

at least three dryers (2), wherein each dryer (2) is provided with a first inlet and outlet (201) connected with the deoxidizing module (1), a second inlet and outlet (202) connected with the discharging branch (6), and a water absorbing structure (203) and a first heating device (204) which are sequentially arranged in a flow channel between the first inlet and outlet (201) and the second inlet and outlet (202);

the inlet end of the purging branch (3) is connected with the discharge branch (6), and the outlet end of the purging branch (3) is connected with the second inlets and outlets (202) of all the dryers (2);

and the two ends of the cooling branch (4) are connected with the first inlets and outlets (201) of all the dryers (2), and the cooling branch (4) is used for cooling hydrogen.

2. The hydrogen purification system according to claim 1, wherein the cooling branch (4) comprises a first control valve (401), a first cooler (402) and a second control valve (403) arranged in series, the number of both the first control valve (401) and the second control valve (403) being the same as the number of the dryers (2), the inlet end of the cooling branch (4) being connected to the first inlet (201) of each of the dryers (2) by means of the respective first control valve (401), the outlet end of the cooling branch (4) being connected to the first inlet (201) of each of the dryers (2) by means of the respective second control valve (403).

3. The hydrogen purification system according to claim 2, wherein the cooling branch (4) further comprises a first gas-liquid separator (404), the first gas-liquid separator (404) being connected in series between the first cooler (402) and the second control valve (403).

4. The hydrogen purification system according to claim 1, further comprising a regenerated hydrogen discharge branch (5), wherein an outlet end of the discharge branch (6) is provided with a discharge control valve (601), wherein a first end of the regenerated hydrogen discharge branch (5) is connected to all the second inlets and outlets (202), and wherein a second end of the regenerated hydrogen discharge branch (5) is connected to an outlet end of the discharge control valve (601).

5. The hydrogen purification system according to claim 4, characterized in that the exhaust branch (6) further comprises a first detection device (602), the first detection device (602) being arranged at the inlet end of the exhaust control valve (601) and being adapted to detect the pressure value of the hydrogen, the first detection device (602) and the exhaust control valve (601) being both connected to the control system of the hydrogen purification system.

6. The hydrogen purification system according to claim 1, wherein the exhaust branch (6) further comprises a second detection device (603), the second detection device (603) is arranged at an outlet end of the exhaust branch (6) and is used for detecting a product dew point value of hydrogen, and the second detection device (603), the purge branch (3) and the cooling branch (4) are all connected with a control system of the hydrogen purification system, so that the control system of the hydrogen purification system can control the purge branch (3) to be opened and the cooling branch (4) to be opened based on the product dew point value.

7. The hydrogen purification system according to claim 1, wherein the dryer (2) further comprises a first temperature detection device (205), the first temperature detection device (205) is disposed in a flow channel between the first heating device (204) and the water absorbing structure (203) and is used for detecting a temperature value of hydrogen, and the first heating device (204) and the first temperature detection device (205) are connected to a control system of the hydrogen purification system.

8. The hydrogen purification system according to any one of claims 1 to 7, wherein the deoxidizing module (1) comprises a deoxidizer (101) and a second cooler (102), the deoxidizer (101) is provided with an air inlet (101-1), an air outlet (101-2), and a second heating device (101-3) and a catalyst layer (101-4) which are sequentially arranged in a flow path between the air inlet (101-1) and the air outlet (101-2), the air outlet (101-2) is connected with the second cooler (102), and the second cooler (102) is connected with the dryer (2).

9. The hydrogen purification system according to claim 8, wherein the deoxygenation module (1) further comprises a second gas-liquid separator (103), the second gas-liquid separator (103) being connected downstream of the second cooler (102).

10. A hydrogen production system comprising a hydrogen purification system as claimed in any one of claims 1 to 9.