Green hydrogen continuous drying system and treatment method thereof

Abstract

The invention relates to a green hydrogen continuous drying system which comprises a cooler, a gas-liquid separator, a supercharger, a hydrogen drying module, a regenerated gas drying module and a connecting pipeline. The hydrogen drying module comprises a raw material hydrogen inlet, a product hydrogen outlet, a regenerated gas inlet, a drying tower a, a drying tower b, a regenerated gas outlet and a heater; each drying tower is respectively communicated with the raw material hydrogen inlet, the product hydrogen outlet, the regenerated gas inlet and the regenerated gas outlet; the heater is arranged in the hydrogen drying module; the cooler is respectively communicated with the hydrogen drying module and the gas-liquid separator; the supercharger is respectively communicated with the gas-liquid separator and the regenerated gas drying module; and the gas outlet end of the regeneration gas drying module is communicated with the regeneration gas inlet. The method has the advantages that the amount of regenerated gas for hydrogen drying is greatly reduced, and the problem that a matched dewatering and drying system cannot work at the load of 0-100% due to load change of a hydrogen production system in an existing treatment mode is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas purification and relates to a green hydrogen continuous drying system and a treatment method thereof. BACKGROUND

[0002] A conventional water electrolysis hydrogen production system uses commercial power to produce hydrogen, and the power supply is stable. The load range of the water electrolysis hydrogen production system is determined by the electrolytic cell. According to the existing technical level, the load of the water electrolysis hydrogen production system is between 30 and 100 percent. The hydrogen produced by water electrolysis contains water, which needs to be dried. To realize continuous drying of hydrogen, it is subject to the hard condition that the traditional hydrogen drying tower needs 10 to 20 percent of regeneration gas. Therefore, the processing load of the traditional hydrogen dehydration and drying system is between 10 and 100 percent.

[0003] New energy photovoltaic and wind power hydrogen production is affected by natural conditions and has the characteristics of unstable power supply. The power load range is 0 to 100 percent. The hydrogen production capacity of the water electrolysis hydrogen production equipment also fluctuates between 0 and 100 percent of the rated hydrogen production. At this time, the green hydrogen continuous drying system in the related technology cannot be applied.

[0004] CN116216642B discloses a hydrogen purification and drying method and system. The amount of regeneration gas is 8 to 24 percent of the rated hydrogen production. The amount of regeneration gas determines the load range of the hydrogen purification and drying system. Therefore, it cannot meet the needs of 0 to 100 percent load green hydrogen purification. Therefore, it is urgent to propose a green hydrogen continuous drying system and a treatment method thereof. SUMMARY

[0005] PURPOSE OF THE INVENTION

[0006] The purpose of the present application is to provide a green hydrogen continuous drying system and a treatment method thereof to solve the problem that the green hydrogen continuous drying system cannot work at 0 to 100 percent load due to changes in the load of the hydrogen production system in the existing treatment method.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A green hydrogen continuous drying system comprises a cooler, a gas-liquid separator, a booster, a hydrogen drying module, a regeneration gas drying module and corresponding connecting pipelines.

[0009] The hydrogen drying module comprises a raw hydrogen inlet, a product hydrogen outlet, a regeneration gas inlet, a drying tower a, a drying tower b, a regeneration gas outlet and a heater, the drying tower a and the drying tower b are in communication with each other, and each drying tower is in communication with the raw hydrogen inlet, the product hydrogen outlet, the heater outlet and the regeneration gas outlet through a connecting pipeline; the heater is used for heating dry regeneration gas, the dry regeneration gas refers to the gas flowing out of the regeneration gas inlet; the gas flowing out of the regeneration gas outlet is high-temperature regeneration gas; the cooler is used for reducing the temperature of the high-temperature regeneration gas to obtain low-temperature regeneration gas; the low-temperature regeneration gas refers to the gas flowing out of the cooler; the gas-liquid separator is used for removing free water in the low-temperature regeneration gas; the booster is used for increasing the pressure of the low-temperature regeneration gas to obtain high-pressure regeneration gas; and the regeneration gas module is used for drying the high-pressure regeneration gas.

[0010] As a further description of the above scheme, when the green hydrogen continuous drying system is running, the drying tower a, the drying tower b and the regeneration gas drying module have the following working connection procedures:

[0011] The first working connection procedure: the drying tower b is independent, and the drying tower a and the regeneration gas drying module are connected in series;

[0012] The second working connection procedure: the drying tower b and the drying tower a are connected in series in turn, and the regeneration gas drying module is independent;

[0013] The third working connection procedure: the drying tower a is independent, and the drying tower b and the regeneration gas drying module are connected in series;

[0014] The fourth working connection procedure: the drying tower a and the drying tower b are connected in series in turn, and the regeneration gas drying module is independent.

[0015] As a further description of the above scheme, the green hydrogen continuous drying system further comprises a valve group, the valve group comprises on-off valves aa, ab, ac, ad, ae, ba, bb, bc, bd, be and corresponding connecting pipelines;

[0016] The A interface of the drying tower a is connected to the B port of the on-off valve aa, the B port of the on-off valve ad and the B port of the on-off valve be through connecting pipelines; the B interface of the drying tower a is connected to the A port of the on-off valve ab, the A port of the on-off valve ac and the A port of the on-off valve ae through connecting pipelines; the A interface of the drying tower b is connected to the B port of the on-off valve ba, the B port of the on-off valve bd and the B port of the on-off valve ae through connecting pipelines; and the B interface of the drying tower b is connected to the A port of the on-off valve bb, the A port of the on-off valve bc and the A port of the on-off valve be through connecting pipelines;

[0017] The raw hydrogen inlet is connected to the A port of the on-off valve aa and the A port of the on-off valve ba through a connecting pipeline; the product hydrogen outlet is connected to the B port of the on-off valve ab and the B port of the on-off valve bb through a connecting pipeline;

[0018] The regeneration gas inlet is connected to the heater inlet through a connecting pipeline; the regeneration gas outlet is connected to the A port of the on-off valve ad, the A port of the on-off valve bd and the cooler inlet through a connecting pipeline; the heater outlet is connected to the B port of the on-off valve ac and the B port of the on-off valve bc through a connecting pipeline; the cooler outlet is connected to the gas-liquid separator inlet through a connecting pipeline; the gas-liquid separator gas phase outlet is connected to the booster inlet through a connecting pipeline; and the booster outlet is connected to the regeneration gas drying module through a connecting pipeline.

[0019] As a further description of the above scheme, the above green hydrogen continuous drying system further comprises a free water outlet, a first analysis port and a second analysis port,

[0020] The free water outlet is connected to the gas-liquid separator liquid phase outlet through a connecting pipeline;

[0021] The first analysis port is in communication with the B interface of the drying tower a;

[0022] The second analysis port is in communication with the B interface of the drying tower b.

[0023] As a further description of the above scheme, the above green hydrogen continuous drying system further comprises a regeneration gas supplement port; the regeneration gas supplement port is arranged on the connecting pipeline between the cooler and the regeneration gas outlet.

[0024] As a further description of the above scheme, the hydrogen drying module further comprises a vent port and an auxiliary valve group; the auxiliary valve group comprises an on-off valve ca, an on-off valve cb, a regulating valve da, a regulating valve db and corresponding connecting pipelines;

[0025] The vent port is connected to the B port of the on-off valve ca through a connecting pipeline; the A port of the on-off valve ca is connected to the A port of the regulating valve da through a connecting pipeline; the B port of the regulating valve da is connected to the regeneration gas outlet through a connecting pipeline; the B port of the on-off valve cb is connected to the A interface of the drying tower a through a connecting pipeline; the A port of the on-off valve cb is connected to the A port of the regulating valve db through a connecting pipeline; and the B port of the regulating valve db is connected to the A interface of the drying tower b through a connecting pipeline.

[0026] As a further description of the above scheme, the drying tower a and the drying tower b are both filled with adsorbents, the adsorbents are used for adsorbing and drying water in hydrogen, and the adsorbents are one or more combinations of molecular sieves, active alumina and silica gel;

[0027] The cooler uses cooling water or air as the cooling medium;

[0028] The heater uses resistance wire, steam or heat-conducting oil as the heating medium;

[0029] The booster is a booster fan or a compressor;

[0030] The regeneration gas drying module is a temperature swing adsorption gas drying device or a pressure swing adsorption gas drying device.

[0031] A processing method applied to the above-mentioned green hydrogen continuous drying system, starting any one of the plurality of drying towers in the hydrogen drying module as the first drying tower to adsorb the raw hydrogen gas entering from the raw hydrogen gas inlet, and the adsorbed raw hydrogen gas is dried and flows out from the product gas outlet as product gas;

[0032] When the first drying tower is in the adsorption process, the second drying tower enters the regeneration process; when the second drying tower is regenerating, the regeneration gas drying module is started to dry the regeneration gas, and the regeneration gas flowing out from the regeneration gas inlet flows through the heater, the second drying tower, the regeneration gas outlet, the cooler, the gas-liquid separator, the booster, and the regeneration gas drying module in turn, and then flows into the regeneration gas inlet again to form a closed loop;

[0033] When the regeneration of the second drying tower is completed, the first drying tower and the second drying tower enter the serial adsorption process in turn to adsorb the raw hydrogen gas, and the adsorbed raw hydrogen gas is dried and flows out from the product gas outlet as product gas; the regeneration gas drying module enters the standby process;

[0034] When the adsorbent in the first drying tower is saturated, the adsorption of the raw hydrogen gas is stopped, and the regeneration process is entered;

[0035] The above-mentioned switching of the drying towers in the hydrogen drying module for adsorption, regeneration and serial adsorption is repeated, and the operation of the regeneration gas drying module for work and standby is repeated, which is cyclic and reciprocating, to realize continuous drying of the raw hydrogen gas.

[0036] As a further description of the above-mentioned scheme, the drying tower is provided with two, which are drying tower a and drying tower b, and when the hydrogen continuous drying process is performed, the following steps are included:

[0037] Step 1: drying tower a is regenerated, drying tower b is adsorbed, the regeneration gas drying module is working, and the end of step 1 is marked by the end of the regeneration of drying tower a;

[0038] Step 2: drying tower b and drying tower a are sequentially adsorbed in series, and the regeneration gas drying module is waiting, and the end of step 2 is marked by the fact that the dew point monitored by the second analysis port reaches the set threshold value;

[0039] Step 3: drying tower a adsorption, drying tower b regeneration, regeneration gas drying module working, the end of step 3 is the end of drying tower b regeneration;

[0040] Step 4: drying tower a and drying tower b in turn series adsorption, regeneration gas drying module waiting, the end of step 4 is that the dew point monitored by the first analysis port reaches the set threshold;

[0041] Step 5: repeat steps 1 to 4 to realize continuous drying of hydrogen.

[0042] As a further description of the above scheme, the regeneration gas refers to the gas used for the regeneration of the hydrogen drying module; the regeneration gas drying module working refers to the regeneration gas drying module adsorbing and drying the regeneration gas; the regeneration gas drying module waiting refers to the regeneration gas drying module not adsorbing and drying the regeneration gas; in step 1, the raw hydrogen enters from the raw hydrogen inlet, flows through the drying tower b to obtain the product gas, and the product gas flows out through the product gas outlet; the regeneration gas enters from the regeneration gas inlet, flows through the heater, the drying tower a, the regeneration gas outlet, the cooler, the gas-liquid separator, the booster, and the regeneration gas drying module in turn, and then flows into the regeneration gas inlet again to form a closed loop; in this step, after the regeneration gas flows through the cooler, the water vapor in the regeneration gas separates out free water due to the decrease in temperature, and the free water flows out from the free water outlet;

[0043] In step 2, the raw hydrogen enters from the raw hydrogen inlet, flows through the drying tower b and the drying tower a in turn to obtain the product gas, and the product gas flows out through the product gas outlet;

[0044] In step 3, the raw hydrogen enters from the raw hydrogen inlet, flows through the drying tower a to obtain the product gas, and the product gas flows out through the product gas outlet; the regeneration gas enters from the regeneration gas inlet, flows through the heater, the drying tower b, the regeneration gas outlet, the cooler, the gas-liquid separator, the booster, and the regeneration gas drying module in turn, and then flows into the regeneration gas inlet again to form a closed loop; in this step, after the regeneration gas flows through the cooler, the water vapor in the regeneration gas separates out free water due to the decrease in temperature, and the free water flows out from the free water outlet;

[0045] In step 4, the raw hydrogen enters from the raw hydrogen inlet, flows through the drying tower a and the drying tower b in turn to obtain the product gas, and the product gas flows out through the product gas outlet.

[0046] As a further description of the above scheme, the adsorption refers to a process in which the moisture in the raw hydrogen gas is adsorbed by the adsorbent filled in the drying tower a or the drying tower b to obtain dried product hydrogen gas; after the adsorbent is saturated, the adsorbent needs to be regenerated; when the adsorbent is regenerated, the moisture adsorbed by the adsorbent is desorbed; after the regeneration is completed, the adsorbent regains the adsorption capacity for the moisture; the regeneration includes two stages of heating regeneration and cold blowing regeneration; the heating regeneration is performed first, and then the cold blowing regeneration is performed;

[0047] The heating regeneration stage:

[0048] The regeneration gas enters the heater through the regeneration gas inlet, is heated to 120-280 DEG C, and then enters the drying tower a or the drying tower b in the heating regeneration process to desorb the moisture adsorbed by the adsorbent in the drying tower; after the regeneration gas exits the drying tower a or the drying tower b, the regeneration gas flows out through the regeneration gas outlet;

[0049] The end of the heating regeneration is marked by the fact that the high-temperature regeneration gas temperature of the regeneration gas outlet reaches 120-280 DEG C;

[0050] The cold blowing regeneration stage:

[0051] The regeneration gas enters the heater through the regeneration gas inlet, and then enters the drying tower a or the drying tower b in the cold blowing regeneration process to cool the adsorbent in the drying tower a or the drying tower b; at this time, the heater does not heat; the regeneration gas takes away the heat of the adsorbent in the drying tower a or the drying tower b; after the regeneration gas exits the drying tower a or the drying tower b, the regeneration gas flows out through the regeneration gas outlet;

[0052] The end of the cold blowing regeneration is marked by the fact that the high-temperature regeneration gas temperature of the regeneration gas outlet reaches 4-45 DEG C.

[0053] As a further description of the above scheme, in steps 2 and 4, the dew point threshold values of the drying tower a and the drying tower b outlets are the same, and are-40 DEG C to-80 DEG C.

[0054] As a further description of the above scheme, the method for adsorbing and drying the regeneration gas by the regeneration gas drying module includes a gas drying method with regeneration gas loss and a gas drying method without regeneration gas loss; the regeneration gas drying module uses secondary regeneration gas for regeneration; the secondary regeneration gas refers to the gas used for the regeneration of the drying tower in the regeneration gas drying module;

[0055] When the gas drying method with regeneration gas loss is used: the regeneration gas drying and the regeneration of the drying tower in the regeneration gas drying module are performed simultaneously; the total consumption amount of the secondary regeneration gas in the regeneration gas drying module is 1-4% of the total amount of the raw hydrogen gas treated in the same period, and the secondary regeneration gas and the regeneration gas are the same gas;

[0056] When the gas drying method without loss of regeneration gas is adopted: the regeneration of the drying tower in the regeneration gas drying module and the regeneration gas drying must be carried out at the same time; the secondary regeneration gas in the regeneration gas drying module has no consumption, and the secondary regeneration gas and the regeneration gas must be the same gas.

[0057] As a further description of the above scheme, the regeneration gas is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; the secondary regeneration gas is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; when the gas drying method with loss of regeneration gas is adopted: the regeneration of the drying tower in the regeneration gas drying module and the regeneration gas drying is replaced by being carried out at different times, and the secondary regeneration gas and the regeneration gas are replaced by being different gases.

[0058] As a further description of the above scheme, the cooler inlet comprises pressure monitoring, and when the pressure of the cooler inlet is lower than 0.1-2 MPa, the regeneration gas is supplemented to the cooler inlet from the regeneration gas supplementing port to make the pressure reach 0.1-2 MPa.

[0059] As a further description of the above scheme, the auxiliary valve group is used for emptying before regeneration and pressurizing after regeneration of the drying tower a and the drying tower b;

[0060] The emptying before regeneration can reduce the pressure of the drying tower in the hydrogen gas drying module which is about to be in the regeneration process, and the pressure reaches 0-2 MPa after emptying; the emptying time before regeneration needs to be controlled within 1-30 min; the method for controlling the emptying time before regeneration is as follows: the opening degree of the regulating valve da is adjusted to control the emptying flow, the switch valve ca in the auxiliary valve group is opened at the beginning of the emptying before regeneration, and the remaining valves are closed; the emptying before regeneration is implemented before steps 1 and 3, and steps 1 and 3 can be entered only after the emptying before regeneration is ended.

[0061] The pressurizing after regeneration is to pressurize the drying tower in the hydrogen gas drying module which ends the regeneration process to the working pressure, and the pressure reaches 0.6-2 MPa after pressurizing; the pressurizing time after regeneration needs to be controlled within 1-30 min; the method for controlling the pressurizing time after regeneration is as follows: the opening degree of the regulating valve db is adjusted to control the pressurizing flow, the switch valve cb in the auxiliary valve group is opened at the beginning of the pressurizing after regeneration, and the remaining valves are closed; the pressurizing after regeneration is implemented before steps 2 and 4, and steps 2 and 4 can be entered only after the pressurizing after regeneration is ended.

[0062] Advantages and effects of the present application:

[0063] 1. The present application provides a green hydrogen continuous drying system and its processing method. In the present application, the two drying towers of the hydrogen drying module can dry the raw hydrogen when they are sequentially connected in series. When one of the drying towers is independently adsorbed, the other drying tower is regenerated by the recycled regeneration gas dried by the regeneration gas drying module, and the raw hydrogen can also be dried. The drying capacity of the independent adsorption and series adsorption is 0-100% of the total design of the raw hydrogen, and the regeneration gas is an independent circulation loop, which is independent of the raw hydrogen gas volume. Therefore, the continuous operation can be realized when the raw gas load changes in the range of 0-100%, thereby realizing the requirement of new energy hydrogen drying processing load of 0-100%.

[0064] 2. In the present application, the two drying towers of the hydrogen drying module are sequentially connected in series before switching the drying towers. The second drying tower in series plays a redundant protection role for the first drying tower, avoiding the situation that the product gas dew point exceeds the threshold value in the traditional switching tower moment, and greatly improving the reliability and stability of the hydrogen purification system.

[0065] 3. Under the premise that the two drying towers in the hydrogen drying module can work in series, the drying outlet of each drying tower in the hydrogen drying module of the present application is provided with a dew point analysis port. The dew point value monitored by the analysis port is used as the switching standard of the working steps of the drying tower in the hydrogen drying module. The green hydrogen continuous drying system provided by the present application fully utilizes the drying tower working capacity surplus set according to the empirical value and theoretical value in the traditional hydrogen drying device, fully utilizes the adsorption performance of the drying module, and greatly improves the working efficiency of the hydrogen purification system.

[0066] 4. The present application consists of two modules, a hydrogen drying module and a regeneration gas drying module. The hydrogen drying module is used to adsorb the moisture in the raw hydrogen to obtain product hydrogen. The regeneration gas drying module is used to dry the regeneration gas recycled by the hydrogen drying module. In the present application, the regeneration gas is circulated in a closed system, and the regeneration gas is not consumed. When the regeneration gas drying module uses a drying device without secondary regeneration gas consumption to dry the regeneration gas, the secondary regeneration gas is not consumed, and the processing gas volume of the regeneration gas drying module is only 10-20% of the raw hydrogen gas volume. Compared with the traditional hydrogen drying device, the investment cost is greatly saved. When the regeneration gas drying module uses a drying device with regeneration gas consumption to dry the regeneration gas, the consumption of the secondary regeneration gas is 10-20% of the processing volume of the regeneration gas drying module, which is equivalent to 1-4% of the raw hydrogen processing volume, and the consumption of the regeneration gas is also greatly saved.

[0067] The system and the processing method thereof provided by the application have high operation flexibility, can perfectly match the high operation flexibility requirement of high-purity green hydrogen production, save the land occupation area, construction cost and operation cost of the system, and reduce the management difficulty and cost, and thus can be applied to industrial processing and is suitable for large-scale promotion. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 A schematic diagram of a green hydrogen continuous drying system according to an embodiment of the application;

[0069] Figure 2 A schematic diagram of a double-tower continuous drying system with regeneration gas consumption used in a regeneration gas drying module of a green hydrogen continuous drying system according to an embodiment of the application;

[0070] Figure 3 A schematic diagram of a double-tower continuous drying system without regeneration gas consumption used in a regeneration gas drying module of a green hydrogen continuous drying system according to an embodiment of the application;

[0071] Figure 4 A schematic diagram of a three-tower continuous drying system without regeneration gas consumption used in a regeneration gas drying module of a green hydrogen continuous drying system according to an embodiment of the application.

[0072] In the drawings, the components represented by each mark are listed as follows:

[0073] 1-hydrogen drying module, 2-regeneration gas drying module, 11-drying tower a, 12-drying tower b, 13-heater, 14-cooler, 15-gas-liquid separator, 16- booster, 21-raw hydrogen inlet, 22-product hydrogen outlet, 23-vent port, 24-regeneration gas inlet, 25-regeneration gas outlet, 26-free water outlet, 27-regeneration gas supplement port, 311-switching valve aa, 312-switching valve ab, 313-switching valve ac, 314-switching valve ad, 315-switching valve ae, 321-switching valve ba, 322-switching valve bb, 323-switching valve bc, 324-switching valve bd, 325-switching valve be, 411-switching valve ca, 412-switching valve cb, 511-regulating valve da, 512-regulating valve db, 211-regeneration gas inlet a, 212-regeneration gas outlet a, 213-regeneration gas vent port a, 214-regeneration gas drying tower aa, 215-regeneration gas drying tower ab, 216-regeneration gas heater a, 221-regeneration gas inlet b, 222-regeneration gas outlet b, 223-regeneration gas water outlet b, 224-regeneration gas drying tower ba, 225-regeneration gas drying tower bb, 226-regeneration gas cooler b, 227-regeneration gas gas-liquid separator b, 228-regeneration gas heater b, 231-regeneration gas inlet c, 232-regeneration gas outlet c, 233-regeneration gas drying tower ca, 234-regeneration gas drying tower cb, 235-regeneration gas drying tower cc, 236-regeneration gas heater, 237-regeneration gas gas-liquid separator c, 238-regeneration gas water cooler c, 239-regeneration gas water outlet c. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0075] The green hydrogen continuous drying system of the present application comprises a cooler 14, a gas-liquid separator 15, a booster 16, a hydrogen drying module 1, a regeneration gas drying module 2 and corresponding connecting pipelines;

[0076] The hydrogen drying module 1 comprises a raw hydrogen inlet 21, a product hydrogen outlet 22, a regeneration gas inlet 24, a drying tower a 11, a drying tower b 12, a regeneration gas outlet 25 and a heater 13, wherein the drying tower a 11 and the drying tower b 12 are communicated with each other, and each drying tower is communicated with the raw hydrogen inlet 21, the product hydrogen outlet 22, the outlet of the heater 13 and the regeneration gas outlet 25 through a connecting pipe; the heater 13 is arranged on the connecting pipe in the hydrogen drying module 1 and used for heating dry regeneration gas, wherein the dry regeneration gas is the gas flowing out of the regeneration gas inlet 24; the gas flowing out of the regeneration gas outlet 25 is high-temperature regeneration gas; the cooler 14 is used for reducing the temperature of the high-temperature regeneration gas to obtain low-temperature regeneration gas; the low-temperature regeneration gas refers to the gas flowing out of the cooler 14; the gas-liquid separator 15 is used for removing free water in the low-temperature regeneration gas; and the booster 16 is used for increasing the pressure of the low-temperature regeneration gas to obtain high-pressure regeneration gas; and the regeneration gas module 2 is used for drying the high-pressure regeneration gas.

[0077] The green hydrogen continuous drying system and the treatment method thereof can dry raw hydrogen when two drying towers of the hydrogen drying module are sequentially connected in series, one drying tower of the hydrogen drying module is independently adsorbed, and the other drying tower is regenerated by using recycled regeneration gas dried by the regeneration gas drying module.

[0078] The green hydrogen continuous drying system has the following working connection procedures when the drying tower a 11, the drying tower b 12 and the regeneration gas drying module 2 are working:

[0079] The first working connection procedure is that the drying tower b 12 is independent, and the drying tower a 11 and the regeneration gas drying module 2 are connected in series, wherein the independent drying tower b 12 refers to independent adsorption of the drying tower b 12.

[0080] The second working connection procedure is that the drying tower b 12 and the drying tower a 11 are sequentially connected in series, and the regeneration gas drying module 2 is independent, wherein the independent regeneration gas drying module 2 refers to entering the waiting procedure.

[0081] The third working connection procedure is that the drying tower a 11 is independent, and the drying tower b 12 and the regeneration gas drying module 2 are connected in series, wherein the independent drying tower a 11 refers to independent adsorption of the drying tower a 11.

[0082] The fourth working connection process: the drying tower a11 and the drying tower b12 are connected in sequence, and the regeneration gas drying module 2 is independent, wherein the regeneration gas drying module 2 enters the waiting process.

[0083] In the present application, the hydrogen gas drying module 1 is connected in sequence before switching the drying tower, and the second drying tower in sequence plays a redundant protection role for the first drying tower, which can stably and continuously output dried product gas, and greatly improves the reliability and stability of the hydrogen purification system.

[0084] The green hydrogen continuous drying system of the present application further comprises a valve group 4, wherein the valve group 4 comprises on-off valves aa311, ab312, ac313, ad314, ae315, ba321, bb322, bc323, bd324, be325 and corresponding connecting pipelines;

[0085] The A interface of the drying tower a11 is connected to the B port of the on-off valve aa311, the B port of the on-off valve ad314 and the B port of the on-off valve be325 through connecting pipelines; the B interface of the drying tower a11 is connected to the A port of the on-off valve ab312, the A port of the on-off valve ac313 and the A port of the on-off valve ae315 through connecting pipelines; the A interface of the drying tower b12 is connected to the B port of the on-off valve ba321, the B port of the on-off valve bd324 and the B port of the on-off valve ae315 through connecting pipelines; the B interface of the drying tower b12 is connected to the A port of the on-off valve bb322, the A port of the on-off valve bc323 and the A port of the on-off valve be325 through connecting pipelines;

[0086] The raw material hydrogen inlet 21 is connected to the A port of the on-off valve aa311 and the A port of the on-off valve ba321 through connecting pipelines; the product hydrogen outlet 22 is connected to the B port of the on-off valve ab312 and the B port of the on-off valve bb322 through connecting pipelines;

[0087] The regeneration gas inlet 24 is connected to the inlet of the heater 13 through connecting pipelines; the regeneration gas outlet 25 is connected to the A port of the on-off valve ad314, the A port of the on-off valve bd324 and the inlet of the cooler 14 through connecting pipelines; the outlet of the heater 13 is connected to the B port of the on-off valve ac313 and the B port of the on-off valve bc323 through connecting pipelines; the outlet of the cooler 14 is connected to the inlet of the gas-liquid separator 15 through connecting pipelines; the gas phase outlet of the gas-liquid separator 15 is connected to the inlet of the booster 16 through connecting pipelines; the outlet of the booster 16 is connected to the regeneration gas drying module 2 through connecting pipelines.

[0088] The green hydrogen continuous drying system of the present application further comprises a free water outlet 26, a first analysis port 126 and a second analysis port 127,

[0089] The free water outlet 26 is connected to the liquid phase outlet of the gas-liquid separator 15 through a connecting pipeline;

[0090] The first analysis port 126 is in communication with the B interface of the drying tower a11;

[0091] The second analysis port 127 is in communication with the B interface of the drying tower b12.

[0092] The green hydrogen continuous drying system of the present application further comprises a regeneration gas supplement port 27; wherein the regeneration gas supplement port 27 is arranged on the connecting pipeline between the cooler 14 and the regeneration gas outlet 25.

[0093] The hydrogen drying module 1 of the present application further comprises a vent port 23 and an auxiliary valve group 3; wherein the auxiliary valve group 3 comprises an on-off valve ca411, an on-off valve cb412, a regulating valve da511, a regulating valve db512 and corresponding connecting pipelines;

[0094] The vent port 23 is connected to the B port of the on-off valve ca411 through a connecting pipeline; the A port of the on-off valve ca411 is connected to the A port of the regulating valve da511 through a connecting pipeline; the B port of the regulating valve da511 is connected to the regeneration gas outlet 25 through a connecting pipeline; the B port of the on-off valve cb412 is connected to the A interface of the drying tower a11 through a connecting pipeline; the A port of the on-off valve cb412 is connected to the A port of the regulating valve db512 through a connecting pipeline; the B port of the regulating valve db512 is connected to the A interface of the drying tower b12 through a connecting pipeline.

[0095] The drying tower a11 and the drying tower b12 of the present application are both filled with adsorbents; wherein the adsorbents are used for adsorbing and drying the water in hydrogen, and the adsorbents are one or more combinations of molecular sieves, activated alumina and silica gel;

[0096] The cooler 14 uses cooling water or air as the cooling medium;

[0097] The heater 13 uses resistance wire, steam or heat-conducting oil as the heating medium;

[0098] The booster 16 is a booster fan or a compressor;

[0099] The regeneration gas drying module 2 is a temperature swing adsorption gas drying device or a pressure swing adsorption gas drying device.

[0100] The method for processing raw hydrogen gas using the green hydrogen continuous drying system is as follows: one of the plurality of drying towers in the hydrogen drying module 1 is started as a first drying tower to adsorb raw hydrogen gas entering the raw hydrogen gas inlet 21, and the adsorbed raw hydrogen gas is dried and flows out of the product gas outlet 22 as product gas;

[0101] When the first drying tower is in the adsorption process, the second drying tower enters the regeneration process; when the second drying tower is regenerated, the regeneration gas drying module 2 is started to dry the regeneration gas, and the regeneration gas flowing out of the regeneration gas inlet 24 flows through the heater 13, the second drying tower, the regeneration gas outlet 25, the cooler 14, the gas-liquid separator 15, the booster 16, the regeneration gas drying module 2, and then flows into the regeneration gas inlet 24 again to form a closed loop;

[0102] When the regeneration of the second drying tower is completed, the first drying tower and the second drying tower enter the serial adsorption process in turn to adsorb raw hydrogen gas, and the adsorbed raw hydrogen gas is dried and flows out of the product gas outlet 22 as product gas; the regeneration gas drying module 2 enters the standby process;

[0103] When the adsorbent in the first drying tower is saturated, the adsorption of raw hydrogen gas is stopped, and the first drying tower enters the regeneration process;

[0104] The above-mentioned switching of the drying towers in the hydrogen drying module 1 for adsorption, regeneration and serial adsorption is repeated, and the operation of the regeneration gas drying module 2 for work and standby is repeated, so that the raw hydrogen gas drying is continuously realized.

[0105] The present application comprises a hydrogen drying module and a regeneration gas drying module. The hydrogen drying module is used to adsorb moisture in raw hydrogen gas to obtain product hydrogen gas, and the regeneration gas drying module is used to dry the regeneration gas circulated in the hydrogen drying module. In the present application, the regeneration gas is circulated in a closed system, and the regeneration gas is not consumed. When the regeneration gas drying module uses a drying device without regeneration gas consumption to dry the regeneration gas, the secondary regeneration gas is not consumed, and the processing gas volume of the regeneration gas drying module is only 10-20% of the raw hydrogen gas volume, which greatly saves the investment cost compared with the traditional hydrogen drying device. When the regeneration gas drying module uses a drying device with regeneration gas consumption to dry the regeneration gas, the consumption of the secondary regeneration gas is 10-20% of the processing volume of the regeneration gas drying module, which is equivalent to 1-4% of the raw hydrogen gas processing volume, and also greatly saves the consumption of the regeneration gas.

[0106] The drying tower of the present application is provided with two drying towers, namely drying tower a11 and drying tower b12. In the hydrogen continuous drying process, the following steps are included:

[0107] Step 1: drying tower a11 regeneration, drying tower b12 adsorption, regeneration gas drying module 2 works, the end of step 1 is the end of drying tower a11 regeneration;

[0108] Step 2: drying tower b12 and drying tower a11 in turn series adsorption, regeneration gas drying module 2 waits, the end of step 2 is that the dew point monitored by the second analysis port 127 reaches the set threshold value;

[0109] Step 3: drying tower a11 adsorption, drying tower b12 regeneration, regeneration gas drying module 2 works, the end of step 3 is the end of drying tower b12 regeneration;

[0110] Step 4: drying tower a11 and drying tower b12 in turn series adsorption, regeneration gas drying module 2 waits, the end of step 4 is that the dew point monitored by the first analysis port 126 reaches the set threshold value;

[0111] Step 5: repeat steps 1 to 4 to realize continuous drying of hydrogen.

[0112] The application introduces a drying tower series working mode, which can fully utilize the adsorption capacity of the drying tower. Because two drying towers are connected in series, the two drying towers are connected in series in turn before switching the drying tower, and the second drying tower connected in series plays a redundant protection role for the first drying tower, avoiding the situation that the product gas dew point exceeds the threshold value at the moment of switching the drying tower in the traditional working mode, and greatly improving the reliability and stability of the hydrogen purification system working;

[0113] Under the premise that drying tower a11 and drying tower b12 can work in series, the application creatively uses the dew point value monitored by the analysis port as the switching standard of the drying tower working step in the hydrogen drying module 1. The green hydrogen continuous drying system provided by the application fully utilizes the drying tower working capacity surplus set according to the empirical value and the theoretical value in the traditional hydrogen drying device, fully utilizes the adsorption performance of the drying module, and greatly improves the working efficiency of the hydrogen purification system;

[0114] The regeneration gas of the application refers to the gas used for the regeneration of the hydrogen drying module 1; wherein the working of the regeneration gas drying module 2 refers to the adsorption drying of the regeneration gas by the regeneration gas drying module 2; the waiting of the regeneration gas drying module 2 refers to that the regeneration gas drying module 2 does not adsorb and dry the regeneration gas; in step 1, the raw hydrogen enters from the raw hydrogen inlet 21, flows through the drying tower b12 to obtain product gas, and the product gas flows out through the product gas outlet 22; the regeneration gas enters from the regeneration gas inlet 24, sequentially flows through the heater 13, the drying tower a11, the regeneration gas outlet 25, the cooler 14, the gas-liquid separator 15, the booster 16, and the regeneration gas drying module 2, and then flows into the regeneration gas inlet 24 again to form a closed loop; in this step, after the regeneration gas flows through the cooler 14, the water vapor in the regeneration gas is separated out due to the decrease of temperature, and the free water flows out from the free water outlet 26;

[0115] In step 2, the raw hydrogen enters from the raw hydrogen inlet 21, sequentially flows through the drying tower b12 and the drying tower a11 to obtain product gas, and the product gas flows out through the product gas outlet 22;

[0116] In step 3, the raw hydrogen enters from the raw hydrogen inlet 21, flows through the drying tower a11 to obtain product gas, and the product gas flows out through the product gas outlet 22; the regeneration gas enters from the regeneration gas inlet 24, sequentially flows through the heater 13, the drying tower b12, the regeneration gas outlet 25, the cooler 14, the gas-liquid separator 15, the booster 16, and the regeneration gas drying module 2, and then flows into the regeneration gas inlet 24 again to form a closed loop; in this step, after the regeneration gas flows through the cooler 14, the water vapor in the regeneration gas is separated out due to the decrease of temperature, and the free water flows out from the free water outlet 26;

[0117] In step 4, the raw hydrogen enters from the raw hydrogen inlet 21, sequentially flows through the drying tower a11 and the drying tower b12 to obtain product gas, and the product gas flows out through the product gas outlet 22; in the application, due to the series adsorption of the two drying towers, the dryness of the product gas is better than that of the traditional hydrogen drying device.

[0118] The adsorption of the application refers to the process that the water in the raw hydrogen is adsorbed by the adsorbent filled in the drying tower a11 or the drying tower b12 to obtain dry product hydrogen; after the adsorbent is saturated, it needs to be regenerated; during the regeneration, the water adsorbed by the adsorbent is desorbed; after the regeneration is completed, the adsorbent regains the adsorption capacity for water; the regeneration includes a heating regeneration stage and a cold blowing regeneration stage, and the heating regeneration stage is performed first and then the cold blowing regeneration stage is performed;

[0119] Heating regeneration stage:

[0120] The regeneration gas enters the heater 13 through the regeneration gas inlet 24, is heated to 120-280 DEG C, and then enters the drying tower a11 or the drying tower b12 in the heating regeneration process to desorb the moisture adsorbed by the adsorbent in the corresponding drying tower, and the high-temperature regeneration gas is discharged from the drying tower a11 or the drying tower b12 and then flows out from the regeneration gas outlet 25;

[0121] The end of the heating regeneration is marked by the temperature of the high-temperature regeneration gas flowing out from the regeneration gas outlet 25 reaching 120-280 DEG C;

[0122] Cold-blowing regeneration stage:

[0123] The regeneration gas enters the heater 13 through the regeneration gas inlet 24, and then enters the drying tower a11 or the drying tower b12 in the cold-blowing regeneration process, and the adsorbent in the drying tower a11 or the drying tower b12 is blown cold at this time, and the heater 13 does not heat, and the heat of the adsorbent in the drying tower a11 or the drying tower b12 is taken away by the regeneration gas, and the high-temperature regeneration gas is discharged from the drying tower a11 or the drying tower b12 and then flows out from the regeneration gas outlet 25;

[0124] The end of the cold-blowing regeneration is marked by the temperature of the high-temperature regeneration gas flowing out from the regeneration gas outlet 25 reaching 4-45 DEG C.

[0125] In steps 2 and 4 of the application, the dew point threshold values of the drying tower a1 and the drying tower b2 are the same, and are-40 DEG C to-80 DEG C.

[0126] The method for adsorbing and drying the regeneration gas in the regeneration gas drying module 2 includes a gas drying method with regeneration gas loss and a gas drying method without regeneration gas loss; the secondary regeneration gas is used for regeneration in the regeneration gas drying module 2; and the secondary regeneration gas is the gas used for regeneration of the drying tower in the regeneration gas drying module 2.

[0127] When the gas drying method with regeneration gas loss is used: the regeneration gas drying and the regeneration of the drying tower in the regeneration gas drying module 2 are simultaneously performed; the total consumption amount of the secondary regeneration gas in the regeneration gas drying module 2 is 1-4% of the total amount of the raw hydrogen treated in the same period, and the secondary regeneration gas and the regeneration gas are the same gas.

[0128] When the gas drying method without regeneration gas loss is used: the regeneration gas drying and the regeneration of the drying tower in the regeneration gas drying module 2 must be simultaneously performed; the secondary regeneration gas in the regeneration gas drying module 2 has no consumption, and the secondary regeneration gas and the regeneration gas must be the same gas, and the application reduces the consumption of the regeneration gas by recycling the regeneration gas.

[0129] For example, Figure 2As shown, it is a double-tower continuous drying system structure with regeneration gas consumption used in the regeneration gas drying module of the green hydrogen continuous drying system; the connection mode and structure of the regeneration gas drying module 2 are similar to those of the hydrogen drying module 1, including the regeneration gas inlet a211, the regeneration gas outlet a212, the regeneration gas venting port a213, the regeneration gas drying tower aa214, the regeneration gas drying tower ab215, the regeneration gas heater a216, the valve group 21 and the related connecting pipelines; the difference lies in that the secondary regeneration gas of the main regeneration drying module 2 is no longer recycled and dried but directly vented, and this structure is suitable for implementation in projects with surplus nitrogen, carbon dioxide and other oxygen-free gases.

[0130] As shown, it is a double-tower continuous drying system structure with regeneration gas consumption used in the regeneration gas drying module of the green hydrogen continuous drying system; the connection mode and structure of the regeneration gas drying module 2 are similar to those of the hydrogen drying module 1, including the regeneration gas inlet a211, the regeneration gas outlet a212, the regeneration gas venting port a213, the regeneration gas drying tower aa214, the regeneration gas drying tower ab215, the regeneration gas heater a216, the valve group 21 and the related connecting pipelines; the difference lies in that the secondary regeneration gas of the main regeneration drying module 2 is no longer recycled and dried but directly vented, and this structure is suitable for implementation in projects with surplus nitrogen, carbon dioxide and other oxygen-free gases. Figure 3 As shown, it is a double-tower continuous drying system structure with regeneration gas consumption used in the regeneration gas drying module of the green hydrogen continuous drying system; the connection mode and structure of the regeneration gas drying module 2 are similar to those of the hydrogen drying module 1, including the regeneration gas inlet a211, the regeneration gas outlet a212, the regeneration gas venting port a213, the regeneration gas drying tower aa214, the regeneration gas drying tower ab215, the regeneration gas heater a216, the valve group 21 and the related connecting pipelines; the difference lies in that the secondary regeneration gas of the main regeneration drying module 2 is no longer recycled and dried but directly vented, and this structure is suitable for implementation in projects with surplus nitrogen, carbon dioxide and other oxygen-free gases.

[0131] As shown, it is a double-tower continuous drying system structure with regeneration gas consumption used in the regeneration gas drying module of the green hydrogen continuous drying system; the connection mode and structure of the regeneration gas drying module 2 are similar to those of the hydrogen drying module 1, including the regeneration gas inlet a211, the regeneration gas outlet a212, the regeneration gas venting port a213, the regeneration gas drying tower aa214, the regeneration gas drying tower ab215, the regeneration gas heater a216, the valve group 21 and the related connecting pipelines; the difference lies in that the secondary regeneration gas of the main regeneration drying module 2 is no longer recycled and dried but directly vented, and this structure is suitable for implementation in projects with surplus nitrogen, carbon dioxide and other oxygen-free gases. Figure 4 As shown, it is a double-tower continuous drying system structure with regeneration gas consumption used in the regeneration gas drying module of the green hydrogen continuous drying system; the connection mode and structure of the regeneration gas drying module 2 are similar to those of the hydrogen drying module 1, including the regeneration gas inlet a211, the regeneration gas outlet a212, the regeneration gas venting port a213, the regeneration gas drying tower aa214, the regeneration gas drying tower ab215, the regeneration gas heater a216, the valve group 21 and the related connecting pipelines; the difference lies in that the secondary regeneration gas of the main regeneration drying module 2 is no longer recycled and dried but directly vented, and this structure is suitable for implementation in projects with surplus nitrogen, carbon dioxide and other oxygen-free gases.

[0132] The regeneration gas of the present application is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; the sub-regeneration gas is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; when the gas drying method with regeneration gas loss is adopted: the regeneration of the drying tower in the regeneration gas drying and regeneration gas drying module 2 is not performed at the same time, the sub-regeneration gas and the regeneration gas are replaced by different gases, and the constraint condition that must be performed at the same time is reduced, and the regeneration of the drying tower in the regeneration gas drying module can be processed at any time and in any place according to the conventional method.

[0133] The cooler 14 inlet of the present application contains pressure monitoring, when the cooler 14 inlet pressure is lower than 0.1-2MPa, the regeneration gas is supplemented to the cooler 14 inlet from the regeneration gas supplement port 27 to make the pressure reach 0.1-2MPa.

[0134] The auxiliary valve group 3 of the present application is used for emptying before regeneration and pressurizing after regeneration of the drying tower a11 and the drying tower b12;

[0135] The emptying before regeneration can reduce the pressure of the drying tower in the hydrogen gas drying module 1 which is about to be in the regeneration process, and the pressure reaches 0-2MPa after emptying; the emptying time before regeneration needs to be controlled within 1-30min; the method for controlling the emptying time before regeneration is as follows: adjusting the opening degree of the regulating valve da511 to control the emptying flow, when the emptying before regeneration starts, the on-off valve ca411 in the auxiliary valve group 3 is opened, and the remaining valves are closed, when the emptying pressure reaches the set value, the on-off valve ca411 is closed; the emptying before regeneration is implemented before steps 1 and 3 start, and only after the emptying before regeneration ends can steps 1 and 3 be entered.

[0136] The pressurizing after regeneration is to pressurize the drying tower in the hydrogen gas drying module 1 which ends the regeneration process to the working pressure, and the pressure reaches 0.6-2MPa after pressurizing; the pressurizing time after regeneration needs to be controlled within 1-30min; the method for controlling the pressurizing time after regeneration is as follows: adjusting the opening degree of the regulating valve db512 to control the pressurizing flow, when the pressurizing after regeneration starts, the on-off valve cb412 in the auxiliary valve group 3 is opened, and the remaining valves are closed, when the pressurizing pressure reaches the set value, the on-off valve cb412 is closed; the pressurizing after regeneration is implemented before steps 2 and 4 start, and only after the pressurizing after regeneration ends can steps 2 and 4 be entered.

[0137] The present application will be specifically described below in combination with specific embodiments, wherein in all the following embodiments, the hydrogen raw gas used has a normal pressure dew point of-22℃ and a pressure of 1.6MPa; the drying tower in the hydrogen gas drying module and the regeneration gas drying module is heated to a regeneration temperature of 220℃ and a cold blow regeneration temperature of 40℃; the drying tower in the hydrogen gas drying module which needs to be regenerated enters the regeneration process after being depressurized to 0.4MPa; the adsorbent loading of the drying tower a and the drying tower b is 750kg of 5A molecular sieve.

[0138] The hydrogen gas drying module product hydrogen gas normal pressure dew point is -75°C, and the pressure is 1.55 MPa; the two drying tower adsorbent loads in the regeneration gas drying module are both 75 kg of 5A molecular sieve; the drying tower in the regeneration gas drying module must be decompressed to 0.01 MPa before regeneration; the drying tower in the regeneration gas drying module is regenerated by decompression for 0.5 h, heating regeneration for 3.9 h, cold blowing for 1.7 h, and pressure charging for 0.5 h to complete regeneration; the regeneration gas drying module outlet drying regeneration gas normal pressure dew point is -75°C, and the pressure is 0.4 MPa.

[0139] Example 1

[0140] The regeneration gas drying module uses a double-tower continuous drying system with regeneration gas consumption; the regeneration gas used for regeneration of the drying tower in the hydrogen gas drying module uses hydrogen, and the flow rate is 915 Nm 3 / h; the secondary regeneration gas used for regeneration of the drying tower in the regeneration gas drying module uses hydrogen, and the flow rate is 80 Nm 3 / h; the raw material hydrogen flow rate is 4000 Nm 3 / h, and the working load is 100%.

[0141] The green hydrogen continuous drying system enters step 1: drying tower b is independently adsorbed, drying tower a is regenerated, the regeneration gas of the regeneration gas drying module one drying tower drying cycle, and the drying tower a is regenerated; after heating regeneration of the drying tower a for 4.8 h, the outlet temperature reaches 220°C, heating regeneration is ended, after cold blowing regeneration for 1.8 h, the outlet temperature reaches 40°C, cold blowing regeneration is ended, drying tower b is independently adsorbed for 6.6 h, and the drying tower b processes raw material gas with a quantity of 26400 Nm 3 ; at this time, the drying tower a regeneration is ended, and step 2 is entered;

[0142] Step 2: drying tower b and drying tower a are sequentially adsorbed in series, and the regeneration gas drying module waits, after series adsorption for 5.4 h, drying tower b and drying tower a are in series, and process raw material gas with a quantity of 21600 Nm 3 ; monitoring shows that the drying tower b outlet dew point is higher than -75°C, and step 3 is entered;

[0143] Step 3: drying tower a is independently adsorbed, drying tower b is regenerated, the regeneration gas of the regeneration gas drying module one drying tower drying cycle, and the drying tower a is regenerated; after heating regeneration of the drying tower b for 4.8 h, the outlet temperature reaches 220°C, heating regeneration is ended, after cold blowing regeneration for 1.8 h, the outlet temperature reaches 40°C, cold blowing regeneration is ended, drying tower a is independently adsorbed for 6.6 h, and the drying tower a processes raw material gas with a quantity of 26400 Nm 3 ; at this time, the drying tower b regeneration is ended, and step 4 is entered;

[0144] Step 4: Dryer Tower A and Dryer Tower B are connected in series for adsorption, and the regeneration gas drying module is waiting. After 5.4 hours of series adsorption, the total amount of raw material gas processed by Dryer Tower A and Dryer Tower B in series is 21600 Nm 3 Step 4 ends when the dew point of the outlet of Dryer Tower A is higher than -75℃.

[0145] This example completes a cycle of continuous hydrogen drying from Step 1 to Step 4, which takes 24 hours, and processes 96000 Nm 3 of raw material hydrogen gas, and outputs 95160 Nm 3 of product hydrogen gas; the amount of secondary regeneration gas used is 1056 Nm 3 , and the amount of vented hydrogen gas accounts for 1.1% of the raw material hydrogen gas, and the proportion of the amount of hydrogen gas vented for regeneration is extremely small.

[0146] Example 2

[0147] The regeneration gas drying module of this example uses a double-tower continuous drying system with regeneration gas consumption; the regeneration gas used for the regeneration of the drying tower in the hydrogen drying module is hydrogen, with a flow rate of 915 Nm 3 / h; the secondary regeneration gas used for the regeneration of the drying tower in the regeneration gas drying module is nitrogen, with a flow rate of 85 Nm 3 / h; the flow rate of the raw material hydrogen gas is 4000 Nm 3 / h, and the working load is 100%.

[0148] The green hydrogen continuous drying system enters Step 1: Dryer Tower B is adsorbed alone, and Dryer Tower A is regenerated. The regeneration gas of the regeneration gas drying module is used for the drying cycle of the first drying tower, and the first drying tower is regenerated. After 4.8 hours of heating and regeneration, the outlet temperature of Dryer Tower A reaches 220℃, and the heating and regeneration ends. After 1.8 hours of cold blow regeneration, the outlet temperature reaches 40℃, and the cold blow regeneration ends. Dryer Tower B is adsorbed alone for 6.6 hours, and the amount of raw material gas processed by Dryer Tower B is 26400 Nm 3 At this time, the regeneration of Dryer Tower A ends, and Step 2 begins.

[0149] Step 2: Dryer Tower B and Dryer Tower A are connected in series for adsorption, and the regeneration gas drying module is waiting. After 5.4 hours of series adsorption, the total amount of raw material gas processed by Dryer Tower B and Dryer Tower A in series is 21600 Nm 3 Step 3 begins when the dew point of the outlet of Dryer Tower B is higher than -75℃.

[0150] Step 3: Dryer Tower A is adsorbed alone, and Dryer Tower B is regenerated. The regeneration gas of the regeneration gas drying module is used for the drying cycle of the first drying tower, and the first drying tower is regenerated. After 4.8 hours of heating and regeneration, the outlet temperature of Dryer Tower B reaches 220℃, and the heating and regeneration ends. After 1.8 hours of cold blow regeneration, the outlet temperature reaches 40℃, and the cold blow regeneration ends. Dryer Tower A is adsorbed alone for 6.6 hours, and the amount of raw material gas processed by Dryer Tower A is 26400 Nm 3; at this time, the drying tower b regeneration ends, step 4 is entered;

[0151] Step 4: drying tower a and drying tower b are sequentially connected in series adsorption, and the regeneration gas drying module waits. After 5.4h of series adsorption, the drying tower a and the drying tower b are connected in series to process 21600Nm 3 of raw material gas. After monitoring that the dew point of the outlet of the drying tower a is higher than -75℃, step 4 ends.

[0152] This embodiment completes one cycle of continuous hydrogen drying from step 1 to step 4, which takes 24h, and processes 96000Nm 3 of raw material hydrogen. The output product hydrogen is 95160Nm 3 ; the consumption of secondary regeneration gas is 1122Nm 3 ; the nitrogen gas venting accounts for 1.17% of the raw material hydrogen, and the proportion of the nitrogen gas venting for regeneration is extremely small.

[0153] After the main regeneration drying module ends regeneration, no hydrogen is used for replacement. The instantaneous maximum nitrogen content in the product hydrogen is ≤5ppm, and the instantaneous minimum nitrogen content is not detected.

[0154] Example 3

[0155] This embodiment uses a double-tower continuous drying system with regeneration gas consumption for the regeneration gas drying module. The regeneration gas used for the regeneration of the drying tower in the hydrogen drying module is nitrogen, with a flow rate of 920Nm 3 / h; the secondary regeneration gas used for the regeneration of the drying tower in the regeneration gas drying module is nitrogen, with a flow rate of 87Nm 3 / h; the flow rate of the raw material hydrogen is shown in Table 1:

[0156] Flow Nm 3 / h]]> 300 0 1000 3000 4000 2000 0 300 Time h 4 8 1 2 18 7 8 6 Load ％ 7.5 0 50 100 100 50 0 7.5

[0157] Table 1

[0158] The green hydrogen continuous drying system enters step 1: drying tower b is adsorbed alone, drying tower a is regenerated, the regeneration gas drying module is dried in one drying tower, the regeneration gas is dried in one drying tower, and the regeneration gas is dried in one drying tower. The regeneration gas drying module is dried in one drying tower. After 4.8h of heating and regeneration of the drying tower a, the outlet temperature reaches 220℃, and the heating and regeneration ends. After 1.8h of cold blowing regeneration, the outlet temperature reaches 40℃, and the cold blowing regeneration ends. The drying tower b is adsorbed alone for 6.6h, and the drying tower b processes 1200Nm 3 of raw material gas. At this time, the drying tower a regeneration ends, and step 2 is entered.

[0159] Step 2: drying tower b and drying tower a are sequentially connected in series adsorption, and the regeneration gas drying module waits. After 18.35h of series adsorption, the drying tower b and the drying tower a are connected in series to process 46800Nm 3 of raw material gas. After monitoring that the dew point of the outlet of the drying tower b is higher than -75℃, step 3 is entered.

[0160] Step 3: drying tower a is independently adsorbed, drying tower b is regenerated, the regeneration gas drying module is regenerated, the regeneration gas of the drying tower drying cycle, drying tower b is regenerated; after drying tower b is heated for 4.8 h, the outlet temperature reaches 220℃, the heating regeneration is ended, after the cold blowing regeneration is performed for 1.8 h, the outlet temperature reaches 40℃, the cold blowing regeneration is ended, drying tower a is independently adsorbed for 6.6 h, and the drying tower a processes 26400 Nm 3 of raw material gas; at this time, drying tower b is regenerated, and step 4 is entered;

[0161] Step 4: drying tower a and drying tower b are sequentially adsorbed in series, the regeneration gas drying module is waiting, after the series adsorption is performed for 22.45 h, drying tower a and drying tower b process 21600 Nm 3 of raw material gas, and step 4 is ended after it is monitored that the outlet dew point of drying tower a is higher than -75℃;

[0162] The hydrogen continuous drying in the embodiment is completed in one cycle from step 1 to step 4, and the time consumption is 54 h, 96000 Nm 3 of raw material hydrogen is processed, the usage of secondary regeneration gas is 1148.4 Nm 3 , the nitrogen venting accounts for 1.2% of the raw material hydrogen, the proportion of the nitrogen venting for regeneration is extremely small. When the hydrogen drying module is used for hydrogen replacement, 20 Nm 3 of hydrogen is consumed per time, which accounts for 0.02% of the raw material hydrogen.

[0163] After the hydrogen drying module is regenerated, the instantaneous maximum nitrogen content in the product hydrogen is ≤65 ppm, and the instantaneous minimum nitrogen content is not detected. After the hydrogen drying module is regenerated, 20 Nm 3 of hydrogen is used for replacement, the instantaneous maximum nitrogen content in the product hydrogen is ≤5 ppm, and the instantaneous minimum nitrogen content is not detected. After the regeneration gas drying module 2 is regenerated, hydrogen is not used for replacement.

[0164] In the embodiment, 96000 Nm 3 of raw material hydrogen is processed by the hydrogen drying module, and 95160 Nm 3 of product hydrogen is output, and the specific product hydrogen flow is shown in Table 2.

[0165] Flow Nm 3 / h]]> 297.4 0 991.3 2973.8 3965 1982.5 0 297.4 Time h 4 8 1 2 18 7 8 6

[0166] Table 2

[0167] Example 4

[0168] The regeneration gas drying module uses a double-tower continuous drying system without regeneration gas consumption. The two drying towers in the regeneration gas drying module are filled with 120 kg of 5A molecular sieve. The dry regeneration gas at the outlet of the regeneration gas drying module has a dew point of -40°C at a pressure of 0.4 MPa. The secondary regeneration gas is directly used as the regeneration gas. The raw hydrogen flow is shown in Table 1.

[0169] The regeneration gas used for the regeneration of the drying tower in the hydrogen drying module uses hydrogen, with a flow of 915 Nm 3 / h. The secondary regeneration gas used for the regeneration of the drying tower in the regeneration gas drying module uses hydrogen, with a flow of 915 Nm 3 / h. The raw hydrogen flow is shown in Table 1.

[0170] The green hydrogen continuous drying system enters Step 1: single adsorption of drying tower b, regeneration of drying tower a, regeneration gas drying module one drying tower drying cycle regeneration gas, regeneration of drying tower a; after 4.8 h of heating regeneration, the outlet temperature of drying tower a reaches 220°C, and the heating regeneration is completed. After 1.8 h of cold blow regeneration, the outlet temperature reaches 40°C, and the cold blow regeneration is completed. The single adsorption of drying tower b lasts for 6.6 h, and the drying tower b processes 1200 Nm 3 ; at this time, the regeneration of drying tower a is completed, and Step 2 is entered.

[0171] Step 2: drying tower b and drying tower a are sequentially connected in series for adsorption, and the regeneration gas drying module waits. After 18.35 h of series adsorption, the drying tower b and the drying tower a process 46800 Nm 3 of raw material gas. When the outlet dew point of drying tower b is higher than -60°C, Step 3 is entered.

[0172] Step 3: single adsorption of drying tower a, regeneration of drying tower b, regeneration gas drying module one drying tower drying cycle regeneration gas drying tower regeneration; after 4.8 h of heating regeneration, the outlet temperature of drying tower b reaches 220°C, and the heating regeneration is completed. After 1.8 h of cold blow regeneration, the outlet temperature reaches 40°C, and the cold blow regeneration is completed. The single adsorption of drying tower a lasts for 6.6 h, and the drying tower a processes 26400 Nm 3 ; at this time, the regeneration of drying tower b is completed, and Step 4 is entered.

[0173] Step 4: drying tower a and drying tower b are sequentially connected in series for adsorption, and the regeneration gas drying module waits. After 22.45 h of series adsorption, the drying tower a and the drying tower b process 21600 Nm 3 of raw material gas. When the outlet dew point of drying tower a is higher than -60°C, Step 4 is completed.

[0174] This embodiment completes one cycle of hydrogen continuous drying from Step 1 to Step 4, which takes 54 h and processes 96000 Nm 3, the hydrogen dry module product hydrogen normal pressure dew point is -60℃, the pressure is 1.55MPa; the secondary regeneration gas usage is 0.

[0175] The raw material hydrogen treated by the hydrogen dry module in the example is 96000Nm 3 , the output product hydrogen is 95160Nm 3 , the specific product hydrogen flow is shown in Table 2.

[0176] Example 5

[0177] The regeneration gas dry module in the example uses a three-tower continuous drying system without regeneration gas consumption, the adsorbent loading in the three drying towers in the regeneration gas dry module is 120kg of 5A molecular sieve; the regeneration gas dry module outlet dry regeneration gas normal pressure dew point is -65℃, the pressure is 0.4MPa, the secondary regeneration gas is directly used as the regeneration gas. The raw material hydrogen flow is shown in Table 1.

[0178] The green hydrogen continuous drying system enters step 1: drying tower b single adsorption, drying tower a regeneration, regeneration gas dry module one drying tower drying cycle regeneration gas, one drying tower regeneration, one drying tower auxiliary adsorption regeneration gas; after drying tower a heating regeneration for 4.8h, the outlet temperature reaches 220℃, the heating regeneration ends, after cold blowing regeneration for 1.8h, the outlet temperature reaches 40℃, the cold blowing regeneration ends, drying tower b single adsorption for 6.6h, the drying tower b treats raw material gas of 1200Nm 3 ; at this time, drying tower a regeneration ends, enters step 2;

[0179] Step 2: drying tower b and drying tower a in turn series adsorption, regeneration gas dry module waits, after series adsorption for 18.35h, drying tower b and drying tower a series treat raw material gas of 46800Nm 3 , monitor that the drying tower b outlet dew point is higher than -60℃, enters step 3;

[0180] Step 3: drying tower a single adsorption, drying tower b regeneration, regeneration gas dry module one drying tower drying cycle regeneration gas one drying tower regeneration; after drying tower b heating regeneration for 4.8h, the outlet temperature reaches 220℃, the heating regeneration ends, after cold blowing regeneration for 1.8h, the outlet temperature reaches 40℃, the cold blowing regeneration ends, drying tower a single adsorption for 6.6h, the drying tower a treats raw material gas of 26400Nm 3 ; at this time, drying tower b regeneration ends, enters step 4;

[0181] Step 4: drying tower a and drying tower b in turn series adsorption, regeneration gas dry module waits, after series adsorption for 22.45h, drying tower a and drying tower b series treat raw material gas of 21600Nm 3 , after monitor that the drying tower a outlet dew point is higher than -60℃, step 4 ends;

[0182] This embodiment from step 1 to step 4 completes a cycle of continuous drying of hydrogen, takes 54h, and processes raw hydrogen 96000Nm 3 The product hydrogen of the hydrogen drying module has an atmospheric pressure dew point of -60℃ and a pressure of 1.55MPa; and the amount of secondary regeneration gas used is 0.

[0183] In this embodiment, the hydrogen drying module processes raw hydrogen 96000Nm 3 , and outputs product hydrogen 95160Nm 3 The specific product hydrogen flow is shown in Table 2.

[0184] In the present application, the traditional double-tower continuous drying structure and method with regeneration gas consumption are used to realize continuous drying of hydrogen with a load of 0-100%, a double-tower series working mode is added to the traditional double-tower continuous drying structure, the control of dew point on the cut tower is realized, and the product gas quality is ensured. The circulation drying of regeneration gas is increased, the amount of regeneration gas is reduced, and in embodiments 4 and 5, the double-tower drying with regeneration gas consumption is used for the regeneration gas, which can realize the drying of product hydrogen without regeneration gas consumption; in embodiments 1, 2 and 3, the double-tower drying with regeneration gas consumption is used for the regeneration gas, which can realize the drying of product hydrogen with 1.2% of the amount of raw gas consumed.

[0185] The above is only a few embodiments of the present application, and does not limit the present application in any form. Although the present application discloses the above preferred embodiments, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, which is equivalent to the equivalent embodiments, and belongs to the scope of the technical solution.

Claims

1. A green hydrogen continuous drying system, characterized in that, The hydrogen drying module (1) comprises a raw hydrogen inlet (21), a product hydrogen outlet (22), a regeneration gas inlet (24), a drying tower a (11), a drying tower b (12), a regeneration gas outlet (25) and a heater (13), the drying tower a (11) and the drying tower b (12) are in communication with each other, and each drying tower is in communication with the raw hydrogen inlet (21), the product hydrogen outlet (22), the heater (13) outlet and the regeneration gas outlet (25) through the connecting pipeline respectively; the heater (13) is used for heating dry regeneration gas, the dry regeneration gas refers to the gas flowing out of the regeneration gas inlet (24); the gas flowing out of the regeneration gas outlet (25) is high-temperature regeneration gas; the cooler (14) is used for reducing the temperature of the high-temperature regeneration gas to obtain low-temperature regeneration gas; the low-temperature regeneration gas refers to the gas flowing out of the cooler (14); the gas-liquid separator (15) is used for removing free water in the low-temperature regeneration gas; the booster (16) is used for increasing the pressure of the low-temperature regeneration gas to obtain high-pressure regeneration gas; and the regeneration gas module (2) is used for drying the high-pressure regeneration gas. When the green hydrogen continuous drying system is running, the drying tower a (11), the drying tower b (12) and the regeneration gas drying module (2) have the following working connection processes:

2. The continuous green hydrogen drying system of claim 1, wherein, The first working connection process: the drying tower b (12) is independent, and the drying tower a (11) and the regeneration gas drying module (2) are connected in series; The second working connection process: the drying tower b (12) and the drying tower a (11) are connected in series in turn, and the regeneration gas drying module (2) is independent; The third working connection process: the drying tower a (11) is independent, and the drying tower b (12) and the regeneration gas drying module (2) are connected in series; The fourth working connection process: the drying tower a (11) and the drying tower b (12) are connected in series in turn, and the regeneration gas drying module (2) is independent. The valve group (4) comprises on-off valves aa (311), on-off valves ab (312), on-off valves ac (313), on-off valves ad (314), on-off valves ae (315), on-off valves ba (321), on-off valves bb (322), on-off valves bc (323), on-off valves bd (324), on-off valves be (325) and corresponding connecting pipelines.

3. The continuous green hydrogen drying system of claim 1, wherein, ​ The A interface of the drying tower a (11) is connected with the B port of the switch valve aa (311), the B port of the switch valve ad (314) and the B port of the switch valve be (325) through a connecting pipeline; the B interface of the drying tower a (11) is connected with the A port of the switch valve ab (312), the A port of the switch valve ac (313) and the A port of the switch valve ae (315) through a connecting pipeline; the A interface of the drying tower b (12) is connected with the B port of the switch valve ba (321), the B port of the switch valve bd (324) and the B port of the switch valve ae (315) through a connecting pipeline; the B interface of the drying tower b (12) is connected with the A port of the switch valve bb (322), the A port of the switch valve bc (323) and the A port of the switch valve be (325) through a connecting pipeline; The raw material hydrogen gas inlet (21) is connected with the A port of the switch valve aa (311) and the A port of the switch valve ba (321) through a connecting pipeline; the product hydrogen gas outlet (22) is connected with the B port of the switch valve ab (312) and the B port of the switch valve bb (322) through a connecting pipeline; The regeneration gas inlet (24) is connected with the inlet of the heater (13) through a connecting pipeline; the regeneration gas outlet (25) is connected with the A port of the switch valve ad (314), the A port of the switch valve bd (324) and the inlet of the cooler (14) through a connecting pipeline; the outlet of the heater (13) is connected with the B port of the switch valve ac (313) and the B port of the switch valve bc (323) through a connecting pipeline; the outlet of the cooler (14) is connected with the inlet of the gas-liquid separator (15) through a connecting pipeline; the outlet of the gas-liquid separator (15) is connected with the inlet of the booster (16) through a connecting pipeline; the outlet of the booster (16) is connected with the regeneration gas drying module (2) through a connecting pipeline.

4. The continuous green hydrogen drying system of claim 1, wherein, It also includes a free water outlet (26), a first analysis port (126) and a second analysis port (127), The free water outlet (26) is connected with the liquid phase outlet of the gas-liquid separator (15) through a connecting pipeline; The first analysis port (126) is in communication with the B interface of the drying tower a (11); The second analysis port (127) is in communication with the B interface of the drying tower b (12).

5. The continuous green hydrogen drying system of claim 1, wherein, It also includes a regeneration gas supplement port (27); the regeneration gas supplement port (27) is arranged on the connecting pipeline between the cooler (14) and the regeneration gas outlet (25).

6. The continuous green hydrogen drying system of claim 1, wherein, The hydrogen gas drying module (1) also includes a vent port (23) and an auxiliary valve group (3); the auxiliary valve group (3) includes a switch valve ca (411), a switch valve cb (412), a regulating valve da (511), a regulating valve db (512) and corresponding connecting pipelines; The venting port (23) is connected with the B port of the switch valve ca (411) through a connecting pipeline; the A port of the switch valve ca (411) is connected with the A port of the regulating valve da (511) through a connecting pipeline; the B port of the regulating valve da (511) is connected with the regenerating gas outlet (25) through a connecting pipeline; the B port of the switch valve cb (412) is connected with the A interface of the drying tower a (11) through a connecting pipeline, and the A port of the switch valve cb (412) is connected with the A port of the regulating valve db (512) through a connecting pipeline; the B port of the regulating valve db (512) is connected with the A interface of the drying tower b (12) through a connecting pipeline.

7. The continuous green hydrogen drying system of claim 1, wherein, The drying tower a (11) and the drying tower b (12) are both filled with adsorbents, and the adsorbents are used for adsorbing and drying the water in the hydrogen; the adsorbents are one or more combinations of molecular sieves, active alumina and silica gel; The cooler (14) uses cooling water or air as the cooling medium; The heater (13) uses resistance wire, steam or heat-conducting oil as the heating medium; The booster (16) is a booster fan or a compressor; The regenerating gas drying module (2) is a temperature swing adsorption gas drying device or a pressure swing adsorption gas drying device.

8. A processing method applied to the green hydrogen continuous drying system in any one of claims 1-7, characterized in that, one of the plurality of drying towers in the hydrogen drying module (1) is started as a first drying tower to adsorb the raw hydrogen entering from the raw hydrogen inlet (21), and the adsorbed raw hydrogen is dried and flows out from the product gas outlet (22) as product gas; when the first drying tower is in the adsorption process, the second drying tower enters the regeneration process; when the second drying tower is regenerated, the regenerating gas drying module (2) is started to dry the regenerating gas, and the regenerating gas flowing out from the regenerating gas inlet (24) flows through the heater (13), the second drying tower, the regenerating gas outlet (25), the cooler (14), the gas-liquid separator (15), the booster (16), the regenerating gas drying module (2) in turn and then flows into the regenerating gas inlet (24) again to form a closed loop; when the regeneration of the second drying tower is completed, the first drying tower and the second drying tower enter the series adsorption process in turn to adsorb the raw hydrogen, and the adsorbed raw hydrogen is dried and flows out from the product gas outlet (22) as product gas; the regenerating gas drying module (2) enters the standby process; when the adsorbent in the first drying tower is saturated, the adsorption of the raw hydrogen is stopped, and the first drying tower enters the regeneration process; The above-mentioned switching of the drying towers in the hydrogen drying module (1) for the adsorption, regeneration and series adsorption operations is repeated, and the operation of the regenerating gas drying module (2) for the working and standby operations is repeated, so that the raw hydrogen drying is continuously realized.

9. The treatment method according to claim 8, characterized in that, The drying tower is provided with two drying towers, namely the drying tower a (11) and the drying tower b (12), and the following steps are included in the continuous hydrogen drying process: Step 1: drying tower a (11) regeneration, drying tower b (12) adsorption, regeneration gas drying module (2) work, the end of step 1 is drying tower a (11) regeneration end; Step 2: drying tower b (12) and drying tower a (11) in turn series adsorption, regeneration gas drying module (2) waiting, step 2 end of the sign is by the second analysis mouth (127) monitored dew point reaches the set threshold value; Step 3: drying tower a (11) adsorption, drying tower b (12) regeneration, regeneration gas drying module (2) work, the end of step 3 is drying tower b (12) regeneration end; Step 4: drying tower a (11) and drying tower b (12) in turn series adsorption, regeneration gas drying module (2) waiting, step 4 end of the sign is by the first analysis mouth (126) monitored dew point reaches the set threshold value; Step 5: repeat step 1 to step 4, realize hydrogen continuous drying.

10. The processing method according to claim 9, characterized in that, The regeneration gas refers to the gas used for hydrogen drying module (1) regeneration; the regeneration gas drying module (2) work refers to the regeneration gas drying module (2) adsorption drying regeneration gas; the regeneration gas drying module (2) waiting refers to the regeneration gas drying module (2) does not adsorb drying regeneration gas; in step 1, the raw hydrogen enters from the raw hydrogen inlet (21), and the product gas is obtained after flowing through the drying tower b (12), and the product gas flows out through the product gas outlet (22); the regeneration gas enters from the regeneration gas inlet (24), and flows through the heater (13), drying tower a (11), regeneration gas outlet (25), cooler (14), gas-liquid separator (15), booster (16), regeneration gas drying module (2) in turn, and then flows into the regeneration gas inlet (24) again, forming a closed loop; in this step, the water vapor in the regeneration gas is separated out free water after flowing through the cooler (14), and the free water flows out from the free water outlet (26); In step 2, the raw hydrogen enters from the raw hydrogen inlet (21), and the product gas is obtained after flowing through the drying tower b (12) and drying tower a (11) in turn, and the product gas flows out through the product gas outlet (22); In step 3, the raw hydrogen enters from the raw hydrogen inlet (21), and the product gas is obtained after flowing through the drying tower a (11), and the product gas flows out through the product gas outlet (22); the regeneration gas enters from the regeneration gas inlet (24), and flows through the heater (13), drying tower b (12), regeneration gas outlet (25), cooler (14), gas-liquid separator (15), booster (16), regeneration gas drying module (2) in turn, and then flows into the regeneration gas inlet (24) again, forming a closed loop; in this step, the water vapor in the regeneration gas is separated out free water after flowing through the cooler (14), and the free water flows out from the free water outlet (26); In step 4, the raw hydrogen enters from the raw hydrogen inlet (21), and the product gas is obtained after flowing through the drying tower a (11) and drying tower b (12) in turn, and the product gas flows out through the product gas outlet (22).

11. The treatment method of claim 9, wherein The adsorption refers to a process that the moisture in the raw hydrogen is adsorbed by the adsorbent filled in the drying tower a (11) or the drying tower b (12) to obtain dried product hydrogen or regenerated gas; after the adsorbent is saturated, it needs to be regenerated, and when the regeneration is performed, the moisture adsorbed by the adsorbent is desorbed, and after the regeneration is completed, the adsorbent regains the adsorption capacity for the moisture; the regeneration comprises a heating regeneration stage and a cold blowing regeneration stage, and the regeneration is performed in the heating regeneration stage first and then in the cold blowing regeneration stage; The heating regeneration stage: The regenerated gas enters the heater (13) from the regenerated gas inlet (24) and is heated to 120-280 DEG C, and then enters the drying tower a (11) or the drying tower b (12) in the heating regeneration process to desorb the moisture adsorbed by the adsorbent in the drying tower, and the high-temperature regenerated gas flows out from the regenerated gas outlet (25) after the drying tower a (11) or the drying tower b (12); The sign of the end of the heating regeneration is that the temperature of the high-temperature regenerated gas flowing out from the regenerated gas outlet (25) reaches 120-280 DEG C; The cold blowing regeneration stage: The regenerated gas enters the heater (13) from the regenerated gas inlet (24) and then enters the drying tower a (11) or the drying tower b (12) in the cold blowing regeneration process, and blows cold to the adsorbent in the drying tower a (11) or the drying tower b (12), at this time, the heater (13) does not heat, the regenerated gas takes away the heat of the adsorbent in the drying tower a (11) or the drying tower b (12), and the high-temperature regenerated gas flows out from the regenerated gas outlet (25) after the drying tower a (11) or the drying tower b (12); The sign of the end of the cold blowing regeneration is that the temperature of the high-temperature regenerated gas flowing out from the regenerated gas outlet (25) reaches 4-45 DEG C.

12. The treatment method of claim 9, wherein, In the steps 2 and 4, the dew point threshold values of the drying tower a (1) and the drying tower b (2) are the same, and are-40 DEG C to-80 DEG C.

13. The treatment method of claim 10, wherein, The method for adsorbing and drying the regenerated gas by the regenerated gas drying module (2) comprises a gas drying method with regenerated gas loss and a gas drying method without regenerated gas loss; the regenerated gas drying module (2) uses secondary regenerated gas for regeneration; the secondary regenerated gas refers to the gas used for the regeneration of the drying tower in the regenerated gas drying module (2); When the gas drying method with regenerated gas loss is adopted: the regenerated gas drying and the regeneration of the drying tower in the regenerated gas drying module (2) are performed simultaneously; the total consumption amount of the secondary regenerated gas in the regenerated gas drying module (2) is 1-4% of the total amount of the raw hydrogen treated in the same period, and the secondary regenerated gas and the regenerated gas are the same gas; When the gas drying method without regenerated gas loss is adopted: the regenerated gas drying and the regeneration of the drying tower in the regenerated gas drying module (2) must be performed simultaneously; the secondary regenerated gas in the regenerated gas drying module (2) has no consumption, and the secondary regenerated gas and the regenerated gas must be the same gas.

14. The processing method according to claim 13, characterized by, The regenerating gas is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; the sub-regenerating gas is one or more of hydrogen, nitrogen, carbon dioxide, argon and helium; when the gas drying method with regenerating gas loss is used: the regenerating replacement of the drying tower in the regenerating gas drying and the regenerating gas drying module (2) is not performed at the same time, and the sub-regenerating gas and the regenerating gas are replaced by different gases.

15. The processing method of claim 9, wherein, The cooler (14) inlet contains pressure monitoring, when the cooler (14) inlet pressure is lower than 0.1-2 MPa, the regenerating gas is supplemented to the cooler (14) inlet from the regenerating gas supplement port (27), so that the pressure reaches 0.1-2 MPa.

16. The processing method of claim 9, wherein, The auxiliary valve group (3) is used for the drying tower a (11) and the drying tower b (12) to be emptied before regeneration and to be pressurized after regeneration. The pre-regeneration emptying can reduce the pressure of the drying tower in the hydrogen gas drying module (1) which is about to be in the regeneration process, and the pressure reaches 0-2 MPa after emptying; the pre-regeneration emptying time needs to be controlled within 1-30 min; the method for controlling the pre-regeneration emptying time is as follows: adjusting the opening degree of the regulating valve da (511) to control the emptying flow, when the pre-regeneration emptying starts, the on-off valve ca (411) in the auxiliary valve group (3) is opened, and the remaining valves are closed, when the emptying pressure reaches the set value, the on-off valve ca (411) is closed; the pre-regeneration emptying is implemented before steps 1 and 3, and only after the pre-regeneration emptying is ended, steps 1 and 3 can be entered. The post-regeneration pressurizing is to pressurize the drying tower in the hydrogen gas drying module (1) which ends the regeneration process to the working pressure, and the pressure reaches 0.6-2 MPa after pressurizing; the post-regeneration pressurizing time needs to be controlled within 1-30 min; the method for controlling the post-regeneration pressurizing time is as follows: adjusting the opening degree of the regulating valve db (512) to control the pressurizing flow, when the post-regeneration pressurizing starts, the on-off valve cb (412) in the auxiliary valve group (3) is opened, and the remaining valves are closed, when the post-regeneration pressurizing pressure reaches the set value, the on-off valve cb (412) is closed; the post-regeneration pressurizing is implemented before steps 2 and 4, and only after the post-regeneration pressurizing is ended, steps 2 and 4 can be entered.

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