Treatment device and hydrogen production system

Abstract

The utility model discloses a treatment device and a hydrogen production system, and belongs to the field of hydrogen production. The treatment device is applied to the hydrogen production system and comprises deoxidation equipment, a deoxidation cooler and a gas-liquid separator which are connected in sequence, the gas inlet of the drying equipment is connected with the gas outlet of the gas-liquid separator, and the regenerated gas return port is connected to the gas inlet of the gas-liquid separator; a gas taking opening is formed in the upper part of the wall surface of the pipeline between the deoxidation cooler and the gas-liquid separator, the first end of the regenerated gas taking pipe is connected to the gas taking opening, and the second end of the regenerated gas taking pipe is connected to the regenerated gas taking opening of the drying equipment. The regeneration gas return port of the drying equipment is connected to the gas inlet of the gas-liquid separator, so that the gas-liquid separation equipment of the drying equipment is omitted, the volume of the treatment device is reduced, the size of a skid is reduced, the cost is saved, and meanwhile, gas is taken from the top of a pipeline between the deoxidation cooler and the gas-liquid separator to serve as regeneration gas; free water flowing into a regeneration gas loop is reduced, and the power consumption of drying equipment is reduced.

Description

Technical Field

[0001] This application belongs to the field of hydrogen production technology, and in particular relates to a processing device and a hydrogen production system. Background Technology

[0002] As hydrogen production systems become increasingly larger, in order to shorten project cycles, reduce on-site installation, and save land, the processing units of hydrogen production systems are usually supplied as skids. The skids of the processing units integrate the equipment and processes required for post-processing into a single skid or container. The skids of larger-scale processing units are larger in size, making them difficult to transport, and larger-scale processing units also have higher requirements for the stability of the hydrogen production system. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the related art. To this end, this application proposes a processing device and a hydrogen production system, wherein the processing device is relatively small in size.

[0004] In a first aspect, this application provides a processing apparatus for use in a hydrogen production system, comprising:

[0005] The deoxygenation equipment, deoxygenation cooler, and gas-liquid separator are connected in sequence.

[0006] The drying equipment has an air inlet connected to the air outlet of the gas-liquid separator, and a regenerated gas return port connected to the air inlet of the gas-liquid separator.

[0007] A regenerated gas intake pipe is provided with an intake port on the upper part of the pipe wall between the deoxygenator and the gas-liquid separator. The first end of the regenerated gas intake pipe is connected to the intake port, and the second end is connected to the regenerated gas intake port of the drying equipment.

[0008] According to the processing apparatus of this application, by connecting the regeneration gas return port of the drying equipment to the inlet of the gas-liquid separator, the gas-liquid separator of the drying equipment is eliminated, the size of the processing apparatus is reduced, the size of the skid is reduced, and the cost is saved. At the same time, gas is taken from the top of the pipeline between the deoxygenator and the gas-liquid separator as regeneration gas, reducing the free water flowing into the regeneration gas circuit and reducing the power consumption of the drying equipment.

[0009] According to one embodiment of this application, the regenerated gas intake pipe gradually increases in height from the first end to the second end.

[0010] According to the processing apparatus of this application, by designing the regenerated gas intake pipe to gradually increase in height from the first end to the second end, free water is prevented from entering the regenerated gas circuit, thereby improving the hot and cold blowing efficiency of the regenerated gas circuit.

[0011] According to one embodiment of this application, the outlet of the drying equipment is provided with an outlet pressure regulating valve, and the inlet of the gas-liquid separator is provided with a regeneration gas flow regulating valve.

[0012] According to the processing device of this application, by adding a gas-liquid separator between the regenerated gas flow regulating valve and the outlet pressure regulating valve, the buffer volume between the two valves is increased, the mutual influence between the two valves is reduced, and the system stability is high.

[0013] According to one embodiment of this application, the outlet of the deoxygenating cooler is connected to the inlet of the gas-liquid separator via a main crude hydrogen pipeline, the first end of the regenerated gas intake pipe is connected to the intake port of the main crude hydrogen pipeline at a first location, the regenerated gas return port of the drying equipment is connected to the second location of the main crude hydrogen pipeline, and the regenerated gas flow regulating valve is located between the first and second locations of the main crude hydrogen pipeline.

[0014] According to the processing apparatus of this application, by connecting the first end of the regenerated gas intake pipe to the top of the main crude hydrogen pipeline at the first location, free water can be prevented from entering the regenerated gas cold blowing and hot blowing circuits of the drying equipment. By setting a regenerated gas flow regulating valve between the first and second locations of the main crude hydrogen pipeline, the flow rate of the regenerated gas entering the drying equipment can be minimized, thereby reducing energy loss and lowering costs.

[0015] According to one embodiment of this application, a regeneration gas cooler is provided at the regeneration gas return port of the drying equipment, and a regeneration gas flow meter is provided between the regeneration gas intake pipe and the main crude hydrogen pipeline at the first intake port.

[0016] According to the processing apparatus of this application, a regeneration gas cooler is installed at the regeneration gas return port of the drying equipment to cool the regeneration gas and condense the water in the regeneration gas after hot blowing, so that the hydrogen entering the drying equipment for adsorption drying is purer and the adsorption efficiency is higher. A regeneration gas flow meter is installed to detect the flow rate of the regeneration gas flowing into the drying equipment.

[0017] According to one embodiment of this application, the drying equipment includes: a plurality of drying towers, wherein the inlet of each drying tower is connected to one of the outlets of the gas-liquid separator and the main crude hydrogen pipeline, and the outlets of each drying tower are connected to one of the inlet of the gas-liquid separator and the outside.

[0018] According to the processing apparatus of this application, by setting up multiple drying towers and connecting them with the gas-liquid separator, the main crude hydrogen pipeline and the outside world, the drying towers can be configured for different operating conditions, which has strong adaptability and flexibility, and high hydrogen drying efficiency.

[0019] According to one embodiment of this application, the drying equipment includes a first drying tower, a second drying tower, and a third drying tower, wherein,

[0020] The first drying tower is configured for product gas drying. The air inlet of the first drying tower is connected to the air outlet of the gas-liquid separator, and the air outlet of the first drying tower is connected to the outside.

[0021] The second drying tower is configured for hot blowing of regenerated gas, and the regenerated gas return port of the second drying tower is connected to the second part of the main crude hydrogen pipeline.

[0022] The third drying tower is configured for regenerated gas cold blowing operation. The regenerated gas intake of the third drying tower is connected to the second end of the regenerated gas intake pipe, and the outlet of the third drying tower is connected to the inlet of the second drying tower.

[0023] According to the processing apparatus of this application, by setting the drying equipment into multiple drying towers, the drying towers can be configured to different operating conditions, enabling continuous drying with high drying efficiency.

[0024] According to one embodiment of this application, the drying equipment further includes: a dust filter, the air inlet of which is connected to one of the plurality of drying towers, the air outlet of which is connected to the outside, and an outlet pressure regulating valve is provided at the air outlet of the dust filter.

[0025] According to the processing apparatus of this application, by setting a dust filter in the drying equipment to filter the dust contained in the hydrogen product gas as it passes through the drying tower, the purity of the hydrogen product gas is relatively high.

[0026] According to one embodiment of this application, the drying equipment further includes a regeneration gas heater, the inlet of which is connected to one of the plurality of drying towers, and the regeneration gas heater is used to heat the regeneration gas.

[0027] According to the processing apparatus of this application, the regeneration gas is heated to a suitable temperature by a regeneration gas heater so that the regeneration gas can enter the second drying tower for hot blowing, thereby improving the regeneration efficiency of the adsorbent.

[0028] Secondly, this application provides a hydrogen production system, which includes:

[0029] The processing apparatus as described above;

[0030] The hydrogen production unit has its hydrogen-side outlet connected to the processing unit.

[0031] According to the hydrogen production system of this application, the hydrogen side outlet of the hydrogen production unit is connected to the processing unit to facilitate the output of qualified hydrogen product gas. The process flow is relatively simple, the skid size and cost are low, and the system operates stably.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0034] Figure 1 This is one of the structural schematic diagrams of the processing device provided in the embodiments of this application;

[0035] Figure 2 This is a second schematic diagram of the processing device provided in the embodiments of this application;

[0036] Figure 3 This is the third schematic diagram of the processing device provided in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the first end and the air intake of the processing device provided in the embodiments of this application.

[0038] Figure label:

[0039] Deoxygenation equipment 1;

[0040] Deoxygenator 2, outlet 21 of deoxygenator 2, air intake 22;

[0041] Gas-liquid separator 3, gas outlet 31 of gas-liquid separator, gas inlet 32 ​​of gas-liquid separator, regeneration gas flow regulating valve 4;

[0042] Drying equipment 5, first drying tower 51(a), second drying tower 51(b), third drying tower 51(c), dust filter 52, dust filter inlet 521, dust filter outlet 522, regeneration gas heater 53, regeneration gas heater inlet 531, drying equipment inlet 54, drying equipment regeneration gas return port 55, drying equipment regeneration gas intake port 56, drying equipment outlet 57, outlet pressure regulating valve 6;

[0043] Regenerated gas intake pipe 7, first end 71, second end 72;

[0044] Main coarse hydrogen pipeline 8, first point 81, second point 82, gas outlet of main coarse hydrogen pipeline 83;

[0045] 91. Regenerated gas flow meter; 92. Regenerated gas cooler. Detailed Implementation

[0046] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0047] The principle of the processing device proposed in this application will be explained in detail below:

[0048] In related technologies, hydrogen production systems are becoming increasingly large-scale. In order to shorten project cycles, reduce on-site installation, and save project land, the processing units of hydrogen production systems are usually supplied as skids. The skids of the processing units integrate the equipment and processes required for post-processing into a single skid or container. The skids of larger-scale processing units are large in size, making them difficult to transport, and larger-scale processing units have higher requirements for the stability of the hydrogen production system.

[0049] To address this technical problem, this application provides a processing apparatus, as described below. Figures 1-4 A processing apparatus according to an embodiment of this application is described.

[0050] like Figure 1 As shown, the processing apparatus of this application embodiment is applied to a hydrogen production system and includes: a deoxygenation device 1, a deoxygenation cooler 2, a gas-liquid separator 3, a drying device 5, and a regeneration gas intake pipe 7.

[0051] Deoxygenation equipment 1, deoxygenation cooler 2 and gas-liquid separator 3 are connected in sequence.

[0052] In this embodiment, the crude hydrogen containing oxygen and saturated water after gas-liquid separation enters the deoxygenation device 1 for deoxygenation. The deoxygenated hot crude hydrogen is cooled by the deoxygenation cooler 2 and the gas-liquid separator 3 separates the condensate.

[0053] The deoxygenation equipment 1 can adopt deoxygenation schemes such as built-in electric heating, chemical deoxygenation, adsorbent deoxygenation or other deoxygenation processes, and no specific restrictions are made in this embodiment.

[0054] The air inlet 54 of the drying equipment is connected to the air outlet 31 of the gas-liquid separator, and the regeneration gas return port 55 of the drying equipment is connected to the air inlet 32 ​​of the gas-liquid separator.

[0055] In this embodiment, the regeneration gas return port 55 of the drying equipment is connected to the inlet 32 ​​of the gas-liquid separator, and the outlet of the deoxygenator cooler 2 is connected to the inlet 32 ​​of the gas-liquid separator. The crude hydrogen after deoxygenation and cooling, along with the regeneration gas, flows into the gas-liquid separator 3 for gas-liquid separation. The hydrogen product gas and hydrogen regeneration gas after gas-liquid separation enter the drying equipment 5 for drying.

[0056] like Figure 4As shown, an air intake port 22 is provided on the upper part of the wall of the pipeline between the deoxygenator cooler 2 and the gas-liquid separator 3. The first end 71 of the regeneration gas intake pipe 7 is connected to the air intake port 22, and the second end 72 of the regeneration gas intake pipe 7 is connected to the regeneration gas intake port 56 of the drying equipment.

[0057] like Figure 4 As shown, in this embodiment, the first end 71 of the regeneration gas intake pipe 7 is connected to the intake port 22 at the top of the pipeline between the deoxygenator cooler 2 and the gas-liquid separator 3, and the crude hydrogen gas located at the top of the pipeline after deoxygenation by the deoxygenator cooler 2 is taken as the regeneration gas of the drying device 5 and flows into the drying device 5.

[0058] In related technologies, hydrogen production systems are becoming increasingly large-scale. To shorten project cycles, reduce on-site installation, and save land, hydrogen production system processing units are typically supplied as skids. The skid of the processing unit integrates the equipment and processes required for post-processing into a single skid or container. The crude hydrogen after deoxygenation and cooling and the regenerated gas after cooling are separated separately in the processing unit, which is equipped with two sets of gas-liquid separators. There are many related equipment, level gauges, control valves, control points, manual valves, and pipelines, resulting in a large production scale for the processing unit. The skids of the processing unit are also large, making them difficult to transport and costly. Furthermore, large-scale processing units place higher demands on the stability of the hydrogen production system.

[0059] In this embodiment, the processing apparatus consists of a deoxygenation device 1, a deoxygenation cooler 2, and a gas-liquid separator 3 connected sequentially. The crude hydrogen containing oxygen and saturated water after gas-liquid separation enters the deoxygenation device 1, deoxygenation cooler 2, and gas-liquid separator 3 for deoxygenation, cooling, and gas-liquid separation. The resulting hydrogen flows into the drying device 5 for adsorption. A regeneration gas intake pipe 7 collects hydrogen without free water from the top of the pipeline between the deoxygenation cooler 2 and the gas-liquid separator 3 and flows into the drying device 5 as regeneration gas, preventing free water from entering the regeneration gas circuit. The regeneration gas flows out from the regeneration gas return port 55 of the drying device and, together with the hydrogen containing free water, enters the gas-liquid separator 3 for gas-liquid separation before flowing into the drying device 5 for adsorption. Since a separate gas-liquid separator 3 is not required for the regeneration gas, the number of components in the drying device 5, such as the gas-liquid separator 3, corresponding level gauges, drain valves, instrument control points, level gauge root valves, and pipelines, is reduced. This simplifies the process flow, reduces the investment cost of the skid, decreases the size of the skid, and lowers the stability requirements of the hydrogen production system.

[0060] According to the processing apparatus provided in the embodiments of this application, by connecting the regeneration gas return port 55 of the drying equipment to the air inlet 32 ​​of the gas-liquid separator, the gas-liquid separation equipment of the drying equipment 5 is eliminated, the volume of the processing apparatus is reduced, the size of the skid is reduced, and the cost is saved. At the same time, gas is taken from the top of the pipeline between the deoxygenator 2 and the gas-liquid separator 3 as regeneration gas, reducing the free water flowing into the regeneration gas circuit and reducing the power consumption of the drying equipment 5.

[0061] In some embodiments, the regenerated gas intake pipe 7 gradually increases in height from the first end 71 to the second end 72.

[0062] The regenerated gas intake pipe 7 can take various structures. It can be a straight line rising, a stepped rise, a curved rise, or other shapes. No specific restrictions are imposed in this embodiment.

[0063] In this embodiment, the regeneration gas intake pipe 7 gradually increases in height from the first end 71 to the second end 72, which can prevent free water from entering the regeneration gas circuit.

[0064] According to the processing apparatus provided in the embodiments of this application, by designing the regenerated gas intake pipe 7 with a gradually increasing structure from the first end 71 to the second end 72, free water is prevented from entering the regenerated gas circuit, thereby improving the hot and cold blowing efficiency of the regenerated gas circuit.

[0065] In some embodiments, such as Figure 1 As shown, an outlet pressure regulating valve 6 is provided at the outlet 57 of the drying equipment, and a regeneration gas flow regulating valve 4 is provided at the inlet 32 ​​of the gas-liquid separator.

[0066] In related technologies, because the drying equipment between the two regulating valves, namely the regenerated gas flow regulating valve and the outlet pressure regulating valve, is filled with molecular sieves, the buffer volume between the two valves is small, and the regulation of the two valves affects each other, resulting in insufficient system stability.

[0067] In this embodiment, a drying device 5 and a gas-liquid separator 3 are installed between the regeneration gas flow regulating valve 4 and the outlet pressure regulating valve 6. This increases the buffer volume between the regeneration gas flow regulating valve 4 and the outlet pressure regulating valve, reduces the mutual influence of the two valves, and improves the stability of the operation of the processing device.

[0068] According to the processing device provided in the embodiments of this application, by adding a gas-liquid separator 3 between the regenerated gas flow regulating valve 4 and the outlet pressure regulating valve 6, the buffer volume between the two valves is increased, the mutual influence between the two valves is reduced, and the system stability is high.

[0069] In some embodiments, the processing apparatus may further include a main coarse hydrogen pipeline 8.

[0070] like Figure 1 As shown, the main coarse hydrogen pipeline 8 is connected between the outlet 21 of the deoxygenator cooler and the inlet of the gas-liquid separator 3.

[0071] The main coarse hydrogen pipeline 8 may include a first point 81 and a second point 82.

[0072] The first end 71 of the regenerated gas intake pipe 7 is connected to the intake port 22 at the top of the first location 81 of the main coarse hydrogen pipeline 8 to prevent free water from entering the regenerated gas circuit.

[0073] The regeneration gas return port 55 of the drying equipment is connected to the second point 82 of the main crude hydrogen pipeline 8, and the regeneration gas flow regulating valve 4 is set between the first point 81 and the second point 82 of the main crude hydrogen pipeline 8.

[0074] In this embodiment, the first point 81 of the main crude hydrogen pipeline 8 is connected to the first end 71 of the regenerated gas intake pipe 7 and the deoxygenator 2. The second point 82 of the main crude hydrogen pipeline 8 is connected to the regenerated gas return port 55 of the drying equipment and the gas-liquid separator 3. The regenerated gas flow regulating valve 4 is set between the first point 81 and the second point 82 of the main crude hydrogen pipeline 8. The crude hydrogen cooled by the deoxygenator 2 flows through the main crude hydrogen pipeline 8. Part of the crude hydrogen is used as regenerated gas and flows from the first point 81 of the main crude hydrogen pipeline 8 into the regenerated gas intake pipe 7 and then enters the drying equipment 5 for cold blowing and hot blowing. The other part of the hydrogen enters the gas-liquid separator 3 together with the regenerated gas flowing out of the regenerated gas return port 55 of the drying equipment through the second point 82 of the main crude hydrogen pipeline 8 for gas-liquid separation. The hydrogen after gas-liquid separation is used as product gas and enters the drying equipment 5 for adsorption drying. After drying, the product gas is discharged.

[0075] Understandably, the flow rates of product gas and regenerated gas are controlled by the regenerated gas flow regulating valve 4 between the first point 81 and the second point 82 of the main crude hydrogen pipeline 8. When the opening of the regenerated gas flow regulating valve 4 increases, the amount of regenerated gas flowing from the first point 81 of the main crude hydrogen pipeline 8 into the regenerated gas intake pipe 7 and then into the drying equipment 5 decreases. When the opening of the regenerated gas flow regulating valve 4 decreases, the amount of regenerated gas flowing from the first point 81 of the main crude hydrogen pipeline 8 into the regenerated gas intake pipe 7 and then into the drying equipment 5 increases.

[0076] According to the processing apparatus provided in the embodiments of this application, by setting the first end 71 of the regenerated gas intake pipe 7 to be connected to the top of the first point 81 of the main crude hydrogen pipeline 8, free water can be prevented from entering the regenerated gas cold blowing and hot blowing circuits of the drying equipment 5. By setting the regenerated gas flow regulating valve 4 between the first point 81 and the second point 82 of the main crude hydrogen pipeline 8, the flow rate of the regenerated gas entering the drying equipment 5 can be minimized, reducing energy loss and lowering costs.

[0077] In some embodiments, such as Figure 1 As shown, a regeneration gas cooler 92 can be installed at the regeneration gas return port 55 of the drying equipment, and a regeneration gas flow meter 91 can be installed between the regeneration gas intake pipe 7 and the main coarse hydrogen pipeline 8 at the top of the intake port 22 of the first location 81.

[0078] In this embodiment, a regeneration gas cooler 92 can be provided at the regeneration gas return port 55 of the drying equipment. After the regeneration gas is hot-blown on the drying equipment 5, it is cooled by the regeneration gas cooler 92 and the condensate is separated. The regeneration gas after the condensate is separated enters the gas-liquid separator 3 together with the product gas for gas-liquid separation. A regeneration gas flow meter 91 can be provided between the top of the regeneration gas intake pipe 7 and the main crude hydrogen pipeline 8 at the first location 81 to facilitate the detection of the regeneration gas flow rate into the drying equipment 5.

[0079] According to the processing apparatus of this application, a regeneration gas cooler 92 is installed at the regeneration gas return port 55 of the drying equipment to cool the regeneration gas and condense the water in the regeneration gas after hot blowing, so that the hydrogen entering the drying equipment 5 for adsorption drying is purer and the adsorption efficiency is higher. A regeneration gas flow meter 91 is installed to detect the flow rate of the regeneration gas flowing into the drying equipment 5.

[0080] In some embodiments, the drying equipment 5 may include a plurality of drying towers.

[0081] A drying tower typically includes a tower body, an air inlet, an air outlet, an adsorbent packing layer, a media inlet, and a media outlet. The drying tower can be made of materials such as stainless steel or carbon steel to ensure corrosion resistance and strength. The adsorbent can include a variety of materials, such as at least one of activated alumina, silica gel, activated carbon, and molecular sieves.

[0082] The drying tower is configured such that its inlet can be selectively connected to the outlet 31 of the gas-liquid separator and the outlet 83 of the main coarse hydrogen pipeline, and its outlet can be selectively connected to the inlet 32 ​​of the gas-liquid separator and the outside environment.

[0083] It is understandable that the drying tower is configured such that its inlet can be selectively connected to the outlet 31 of the gas-liquid separator and the outlet 83 of the main crude hydrogen pipeline, meaning that the drying tower is connected to one of the outlets of the gas-liquid separator and the main crude hydrogen pipeline under different operating conditions. The drying tower is also configured such that its outlets are selectively connected to the inlet 32 ​​of the gas-liquid separator and the outside environment, meaning that the drying tower is connected to one of the inlet 32 ​​of the gas-liquid separator and the outside environment under different operating conditions.

[0084] In this embodiment, when any drying tower is configured such that its inlet is connected to the outlet 31 of the gas-liquid separator, the drying tower is in product gas drying mode and its outlet is connected to the outside. When any drying tower is configured such that its inlet is connected to the outlet 83 of the main coarse hydrogen pipeline through the regenerated gas intake pipe 7, the drying tower is in regenerated gas cold blowing mode. When the outlet of the drying tower is connected to the remaining drying tower, the remaining drying tower is in regenerated gas hot blowing mode.

[0085] According to the processing apparatus provided in the embodiments of this application, by setting up multiple drying towers and connecting them with the gas-liquid separator 3, the main crude hydrogen pipeline 8 and the outside world, the drying towers can be configured for different working conditions, which has strong adaptability and flexibility, and high hydrogen drying efficiency.

[0086] In some embodiments, such as Figure 1 As shown, the drying equipment 5 may include a first drying tower 51(a), a second drying tower 51(b), and a third drying tower 51(c).

[0087] like Figure 3 As shown, the first drying tower 51(a) is configured for product gas drying. The air inlet of the first drying tower 51(a) is connected to the air outlet 31 of the gas-liquid separator, and the air outlet of the first drying tower 51(a) is connected to the outside.

[0088] The second drying tower 51(b) is configured for hot blowing of regenerated gas, and the regenerated gas return port of the second drying tower 51(b) is connected to the second part 82 of the main crude hydrogen pipeline 8.

[0089] The third drying tower 51(c) is configured for regeneration gas cold blowing operation. The regeneration gas inlet of the third drying tower 51(c) is connected to the second end 72 of the regeneration gas inlet pipe 7, and the outlet of the third drying tower 51(c) is connected to the inlet of the second drying tower 51(b).

[0090] like Figure 1 As shown, the hollow arrows indicate the direction of hydrogen product gas, and the solid arrows indicate the direction of hydrogen regeneration gas.

[0091] In this embodiment, the outlet of the gas-liquid separator of the hydrogen production system outputs crude hydrogen containing oxygen and saturated water. The crude hydrogen enters the deoxygenation equipment 1 through the inlet of the deoxygenation equipment 1 for deoxygenation. After deoxygenation in the deoxygenation equipment 1, the crude hydrogen enters the deoxygenation cooler 2 through the inlet of the deoxygenation cooler 2 for cooling and separation of condensate. The crude hydrogen cooled and separated from the condensate by the deoxygenation cooler 2 enters the drying equipment 5.

[0092] like Figure 2 As shown, a portion of the crude hydrogen enters the first drying tower 51(a) through the regeneration gas flow regulating valve 4 for adsorption drying. The crude hydrogen regeneration gas that does not pass through the regeneration gas flow regulating valve 4 enters the third drying tower 51(c) for cold blowing. After cold blowing, it is heated to a suitable temperature and enters the second drying tower 51(b) for hot blowing. The regeneration gas after hot blowing is cooled by the regeneration gas cooler 92 and the condensate is separated. Then, it enters the gas-liquid separator 3 together with the product gas for gas-liquid separation. The regeneration gas and the product gas after gas-liquid separation in the gas-liquid separator 3 enter the first drying tower 51(a) together as product gas for adsorption drying. After drying, it is discharged from the drying equipment 5.

[0093] It is understood that in some embodiments, the drying equipment 5 may also be other process schemes, including but not limited to the second drying tower 51(b) being configured for product gas drying, the first drying tower 51(a) being configured for regeneration gas hot blowing, and the third drying tower 51(c) being configured for regeneration gas cold blowing; or, the third drying tower 51(c) being configured for product gas drying, the second drying tower 51(b) being configured for regeneration gas hot blowing, and the first drying tower 51(a) being configured for regeneration gas cold blowing, etc.

[0094] According to the processing apparatus provided in the embodiments of this application, by setting the drying equipment 5 into multiple drying towers, the drying towers can be configured to different operating conditions, and continuous drying can be carried out with high drying efficiency.

[0095] In some embodiments, the drying device 5 may further include a dust filter 52.

[0096] The air inlet 521 of the dust filter is connected to one of the multiple drying towers, and the air outlet 522 of the dust filter is connected to the outside. An outlet pressure regulating valve 6 is provided at the air outlet 522 of the dust filter.

[0097] In this embodiment, as Figure 1 As shown, the outlet of the gas-liquid separator of the hydrogen production system outputs crude hydrogen containing oxygen and saturated water. The crude hydrogen enters the deoxygenation equipment 1 through the inlet of the deoxygenation equipment 1 for deoxygenation. After deoxygenation in the deoxygenation equipment 1, the crude hydrogen enters the deoxygenation cooler 2 through the inlet of the deoxygenation cooler 2 to cool and condense the water vapor in the crude hydrogen. The crude hydrogen cooled and separated by the deoxygenation cooler 2 enters the drying equipment 5.

[0098] A portion of the crude hydrogen enters the first drying tower 51(a) through the regeneration gas flow regulating valve 4 for adsorption drying. The crude hydrogen regeneration gas that does not pass through the regeneration gas flow regulating valve 4 enters the third drying tower 51(c) for cold blowing. After cold blowing, it is heated to a suitable temperature and enters the second drying tower 51(b) for hot blowing. The regeneration gas after hot blowing is cooled by the regeneration gas cooler 92 and the condensate is separated. Then, it enters the gas-liquid separator 3 together with the product gas for gas-liquid separation. The regeneration gas and the product gas after gas-liquid separation in the gas-liquid separator 3 enter the first drying tower 51(a) together as product gas for adsorption drying. After drying, the adsorbent is filtered through the dust filter 52. The filtered pure hydrogen gas is discharged from the drying equipment 5 through the outlet pressure regulating valve 6.

[0099] Understandably, the outlet pressure regulating valve 6 adjusts the flow rate of pure hydrogen gas exiting the drying equipment 5 by controlling its opening degree.

[0100] According to the processing apparatus provided in the embodiments of this application, by setting a dust filter 52 in the drying equipment 5 to filter the dust contained in the hydrogen product gas when it passes through the drying tower, the purity of the hydrogen product gas is relatively high.

[0101] In some embodiments, the drying device 5 may further include a regeneration gas heater 53.

[0102] The inlet 531 of the regenerated gas heater is connected to one of the multiple drying towers, and the regenerated gas heater 53 is used to heat the regenerated gas.

[0103] In this embodiment, as Figure 1 As shown, the outlet of the gas-liquid separator of the hydrogen production system outputs crude hydrogen containing oxygen and saturated water. The crude hydrogen enters the deoxygenation equipment 1 through the inlet of the deoxygenation equipment 1 for deoxygenation. After deoxygenation in the deoxygenation equipment 1, the crude hydrogen enters the deoxygenation cooler 2 through the inlet of the deoxygenation cooler 2 to cool and condense the water vapor in the crude hydrogen. The crude hydrogen cooled and separated by the deoxygenation cooler 2 enters the drying equipment 5.

[0104] A portion of the crude hydrogen enters the first drying tower 51(a) through the regeneration gas flow regulating valve 4 for adsorption drying. The crude hydrogen regeneration gas that does not pass through the regeneration gas flow regulating valve 4 enters the third drying tower 51(c) for cold blowing. After cold blowing, it is heated to a suitable temperature by the regeneration gas heater 53 and enters the second drying tower 51(b) for hot blowing. The regeneration gas after hot blowing is cooled by the regeneration gas cooler 92 and the condensate is separated. Then, it enters the gas-liquid separator 3 together with the product gas for gas-liquid separation. The regeneration gas and the product gas after gas-liquid separation in the gas-liquid separator 3 enter the first drying tower 51(a) together as product gas for adsorption drying. After drying, the adsorbent is filtered through the dust filter 52. The filtered pure hydrogen gas is discharged from the drying equipment 5 through the outlet pressure regulating valve 6.

[0105] According to the processing apparatus provided in the embodiments of this application, the regeneration gas is heated to a suitable temperature by the regeneration gas heater 53 so that the regeneration gas can enter the second drying tower 51(b) for hot blowing, thereby improving the regeneration efficiency of the adsorbent.

[0106] This application also provides a hydrogen production system.

[0107] The hydrogen production system includes a processing unit and a hydrogen production unit.

[0108] The processing device is the processing device described in the above embodiment;

[0109] The hydrogen-side outlet of the hydrogen production unit is connected to the processing unit.

[0110] The hydrogen production unit is the core part of the hydrogen production system, responsible for producing hydrogen by electrolysis of water. It mainly includes components such as an electrolyzer. A gas-liquid mixture flows out of the hydrogen side outlet of the hydrogen production unit. After the gas-liquid mixture passes through the gas-liquid separator of the hydrogen production system to separate the incompletely reacted water or other liquids, the crude hydrogen containing oxygen and saturated water flows into the treatment unit for deoxygenation and drying.

[0111] The hydrogen production system provided in the embodiments of this application is connected to the processing device through the hydrogen side outlet of the hydrogen production device, so as to output qualified hydrogen product gas. The process flow is relatively simple, the skid size and cost are low, and the system operates stably.

[0112] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0113] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0114] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0115] In the description of this application, "multiple" means two or more.

[0116] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0117] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0118] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0119] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A processing apparatus for use in a hydrogen production system, characterized in that, include: The deoxygenation equipment, deoxygenation cooler, and gas-liquid separator are connected in sequence. The drying equipment has an air inlet connected to the air outlet of the gas-liquid separator, and a regenerated gas return port connected to the air inlet of the gas-liquid separator. A regenerated gas intake pipe is provided with an intake port on the upper part of the pipe wall between the deoxygenator and the gas-liquid separator. The first end of the regenerated gas intake pipe is connected to the intake port, and the second end is connected to the regenerated gas intake port of the drying equipment.

2. The processing apparatus according to claim 1, characterized in that, The regenerated gas intake pipe gradually increases in height from the first end to the second end.

3. The processing apparatus according to claim 1, characterized in that, The drying equipment is equipped with an outlet pressure regulating valve at its outlet, and the gas-liquid separator is equipped with a regeneration gas flow regulating valve at its inlet.

4. The processing apparatus according to claim 3, characterized in that, The outlet of the deoxygenator cooler is connected to the inlet of the gas-liquid separator via a main crude hydrogen pipeline. The first end of the regenerated gas intake pipe is connected to the intake port of the main crude hydrogen pipeline at the first location. The regenerated gas return port of the drying equipment is connected to the second location of the main crude hydrogen pipeline. The regenerated gas flow regulating valve is located between the first and second locations of the main crude hydrogen pipeline.

5. The processing apparatus according to claim 4, characterized in that, A regeneration gas cooler is provided at the regeneration gas return port of the drying equipment, and a regeneration gas flow meter is provided between the regeneration gas intake pipe and the main crude hydrogen pipeline at the first intake port.

6. The processing apparatus according to claim 4 or 5, characterized in that, The drying equipment includes: multiple drying towers, wherein the air inlet of each drying tower is connected to one of the air outlets of the gas-liquid separator and the main coarse hydrogen pipeline, and the air outlet of each drying tower is connected to one of the air inlets of the gas-liquid separator and the outside.

7. The processing apparatus according to claim 4, characterized in that, The drying equipment includes a first drying tower, a second drying tower, and a third drying tower, wherein, The first drying tower is configured for product gas drying. The air inlet of the first drying tower is connected to the air outlet of the gas-liquid separator, and the air outlet of the first drying tower is connected to the outside. The second drying tower is configured for hot blowing of regenerated gas, and the regenerated gas return port of the second drying tower is connected to the second part of the main crude hydrogen pipeline. The third drying tower is configured for regenerated gas cold blowing operation. The regenerated gas intake of the third drying tower is connected to the second end of the regenerated gas intake pipe, and the outlet of the third drying tower is connected to the inlet of the second drying tower.

8. The processing apparatus according to claim 6, characterized in that, The drying equipment further includes a dust filter, the air inlet of which is connected to one of the multiple drying towers, the air outlet of which is connected to the outside, and an outlet pressure regulating valve is provided at the air outlet of the dust filter.

9. The processing apparatus according to claim 6, characterized in that, The drying equipment further includes a regenerated gas heater, the inlet of which is connected to one of the plurality of drying towers, and the regenerated gas heater is used to heat the regenerated gas.

10. A hydrogen production system, characterized in that, include: The processing apparatus as described in any one of claims 1-9; The hydrogen production unit has its hydrogen-side outlet connected to the processing unit.

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