Electrolytic hydrogen production equipment

Abstract

The present application relates to an electrolytic hydrogen production apparatus, comprising: a plurality of electrolytic cells; a plurality of first exhaust pipes, each first exhaust pipe being communicated with a corresponding electrolytic cell so as to exhaust the generated first gas; the first detection device comprises a plurality of first detection modules, and each first detection module is connected with the corresponding first exhaust pipe; each first exhaust pipe is connected with the first treatment device; each first exhaust pipe has a first state communicating with the corresponding first detection module and a second state communicating with the first processing device; in the first state, each first detection module is used for detecting the purity of first gas exhausted by the corresponding first exhaust pipe; and in the second state, the first treatment device is used for carrying out washing, cooling and gas-liquid separation on the first gas converged by the plurality of first exhaust pipes. The electrolytic hydrogen production equipment can be used for respectively testing the purity of gas generated by a plurality of electrolytic cells so as to accurately judge which electrolytic cell generates unqualified gas purity.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen preparation, and in particular to an electrolytic hydrogen production device. Background Art

[0002] Hydrogen production by water electrolysis is currently a commonly used method for producing hydrogen. During the electrolysis process, gas leakage will occur at the diaphragm, with oxygen on the anode side leaking to the cathode side, and hydrogen on the cathode side leaking to the anode side, resulting in the resulting gas quality not meeting the standards. Therefore, after completing operations such as gas washing, cooling, and gas-liquid separation, it is necessary to monitor the hydrogen content in oxygen and the oxygen content in hydrogen. With the rapid development of the hydrogen production industry by electrolysis, hydrogen production by a single electrolyzer can no longer meet existing needs. Therefore, manufacturers have gradually begun to produce hydrogen simultaneously through multiple electrolyzers. However, in the related art, when multiple electrolyzers are producing hydrogen at the same time, the existing gas purity monitoring cannot accurately determine which electrolyzer produces gas with unqualified purity. Utility Model Content

[0003] Based on this, it is necessary to provide an electrolytic hydrogen production device that can individually test the purity of the gas produced by multiple electrolyzers, so as to accurately determine which electrolyzer has unqualified gas purity.

[0004] A hydrogen production device by electrolysis, comprising:

[0005] A plurality of electrolytic cells, each for electrolyzing water;

[0006] A plurality of first exhaust pipes, each of which is connected to a corresponding electrolytic cell to discharge a generated first gas, wherein the first gas is one of oxygen and hydrogen;

[0007] A first detection device, comprising a plurality of first detection modules, each of which is connected to a corresponding first exhaust pipe; and

[0008] a first processing device, each of the first exhaust pipes being connected to the first processing device;

[0009] Each of the first exhaust pipes has a first state in which it is connected to the corresponding first detection module, and a second state in which it is connected to the first processing device; in the first state, each of the first detection modules is used to detect the purity of the first gas discharged from the corresponding first exhaust pipe; in the second state, the first processing device is used to wash, cool and separate the gas-liquid of the first gas introduced into the multiple first exhaust pipes.

[0010] In some embodiments, when the first detection module detects that the purity of the first gas is not lower than a preset value, the corresponding first exhaust pipe is configured to switch from the first state to the second state.

[0011] In some embodiments, each of the first detection modules includes a first separation scrubber, a drying mechanism and a purity detector connected in sequence, wherein the first separation scrubber and the corresponding first exhaust pipe can be selectively connected, the drying mechanism is used to dry the first gas discharged through the first separation scrubber, and the purity detector is used to detect the purity of the first gas.

[0012] In some embodiments, the drying mechanism includes a plurality of dryers connected in sequence, each dryer having a drying chamber for accommodating a desiccant, a plurality of baffles extending from the side walls of the drying chamber and arranged at intervals along the height direction thereof, and any two adjacent baffles in the height direction are arranged on two pairs of side walls of the drying chamber.

[0013] In some embodiments, a flow meter is provided between the drying mechanism and the purity detector.

[0014] In some embodiments, the first processing device includes a second separation scrubber, a cooler, and a gas-liquid separator connected in sequence, wherein the second separation scrubber and the first exhaust pipe can be selectively connected, the cooler is used to cool the first gas discharged through the second separation scrubber, and the gas-liquid separator is used to separate the first gas and the liquid entrained therein.

[0015] In some embodiments, at least one of the first separation scrubber and the second separation scrubber comprises:

[0016] a separation element, comprising a separation chamber, and a mixing inlet and a first overflow port connected to the separation chamber, wherein the mixing inlet is used for allowing the first gas discharged from the first exhaust pipe to flow into the separation chamber, and the first overflow port is used for allowing the first gas to be discharged after removing the entrained liquid in the separation chamber;

[0017] A washing element comprises a washing chamber, a washing inlet and a second overflow port connected to the washing chamber, wherein the washing inlet is connected to the first overflow port so as to allow the first gas to pass below the level of the washing liquid in the washing chamber, and the second overflow port is used to discharge the first gas that overflows the level of the washing liquid.

[0018] In some embodiments, the electrolysis hydrogen production equipment also includes a cooling liquid loop for circulating cooling liquid, and a heat exchange device for providing low-temperature cooling liquid, and the heat exchange device and the cooler are located on the cooling liquid loop.

[0019] In some embodiments, when the first gas is hydrogen, two hydrogen branch pipes are connected in parallel at the gas outlet of the gas-liquid separator, one of the two hydrogen branch pipes is used to collect hydrogen with qualified purity, and the other is used to discharge hydrogen with unqualified purity.

[0020] In some embodiments, the electrolytic hydrogen production equipment further includes a second detection device, a second processing device and a plurality of second exhaust pipes, each of the second exhaust pipes is connected to a corresponding one of the electrolytic cells to discharge the generated second gas, one of the first gas and the second gas is oxygen, and the other is hydrogen; the second detection device includes a plurality of second detection modules, each second detection module is connected to a corresponding one of the second exhaust pipes; each of the second exhaust pipes is connected to the second processing device;

[0021] Each second exhaust pipe has a third state in which it is connected to the corresponding second detection module, and a fourth state in which it is connected to the second processing device; in the third state, each second detection module is used to detect the purity of the second gas discharged from the corresponding second exhaust pipe; in the fourth state, the second processing device washes, cools and separates gas and liquid from the second gas introduced by multiple second exhaust pipes.

[0022] The above-mentioned electrolytic hydrogen production equipment is provided with multiple electrolytic cells to electrolyze water to meet the higher hydrogen production demand. Each first exhaust pipe is used to discharge the first gas (hydrogen or oxygen) electrolyzed in the corresponding electrolytic cell. In the first state, each first detection module is connected to the corresponding first exhaust pipe, so that the first gas discharged from each first exhaust pipe can be sent to the corresponding first detection module respectively to complete the purity detection of the first gas generated by each electrolytic cell respectively. In the second state, each first exhaust pipe is connected to the first processing device, so that the first gas discharged from each first exhaust pipe can be collected and sent to the first processing device to centrally complete the washing, cooling and gas-liquid separation of the first gas generated by all electrolytic cells. The first exhaust pipe can be switched between the first state and the second state. Therefore, by switching the state of the first exhaust pipe, the first processing device can perform gas purity detection on the first gas generated by the corresponding electrolytic cell through each first detection module before washing, cooling and gas-liquid separation of the first gas, and respectively judge whether the purity of the first gas generated by each electrolytic cell is qualified. In this way, there will be no problem of being unable to distinguish which electrolytic cell has produced gas of unqualified purity when washing, cooling and gas-liquid separation are first performed and then combined for purity testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic diagram of an electrolytic hydrogen production device in an embodiment of the present application.

[0024] FIG. 2 is a schematic diagram of a first processing device in an embodiment of the present application.

[0025] FIG. 3 is a schematic diagram of a first detection module in an embodiment of the present application.

[0026] FIG. 4 is a schematic diagram of a dryer in one embodiment of the present application.

[0027] Reference numerals:

[0028] 100. Electrolyzer;

[0029] 210, first exhaust pipe; 211, detection branch pipe; 212, processing branch pipe; 220, second exhaust pipe;

[0030] 300, first detection module; 310, first separation washer; 320, drying mechanism; 321, dryer; 322, drying chamber; 323, baffle; 330, purity detector; 340, flow meter; 350, mounting plate;

[0031] 400, first treatment device; 410, second separation scrubber; 411, separation element; 4111, separation chamber; 4112, mixing inlet; 4113, first overflow outlet; 4114, inlet pipe; 412, washing element; 4121, washing chamber; 4122, washing inlet; 4123, second overflow outlet; 4124, overflow pipe; 420, cooler; 430, gas-liquid separator; 440, hydrogen branch pipe; 450, discharge pipe; 461, exhaust main pipe; 462, drain pipe; 463, drain;

[0032] 500, cooling liquid circuit; 510, liquid supply section; 520, liquid return section;

[0033] 610, second detection module; 620, second processing device;

[0034] 700, water tank; 710, water supply pipe; 721, first drainage branch pipe; 722, second drainage branch pipe; 723, third drainage branch pipe; 724, fourth drainage branch pipe; 725, fifth drainage branch pipe; 726, drainage collecting pipe. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0038] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0041] Referring to FIGS. 1 to 3 , an electrolytic hydrogen production device provided in an embodiment of the present application includes a plurality of electrolytic cells 100, a plurality of first exhaust pipes 210, a first detection device and a first processing device 400, wherein the first detection device includes a plurality of first detection modules 300. The plurality of electrolytic cells 100 are used for electrolyzing water, and each first exhaust pipe 210 is connected to a corresponding electrolytic cell 100 to discharge the generated first gas, which is one of oxygen and hydrogen. Each first detection module 300 is connected to a corresponding first exhaust pipe 210. Each first exhaust pipe 210 is connected to the first processing device 400. Each first exhaust pipe 210 has a first state in which it is connected to the corresponding first detection module 300, and a second state in which it is connected to the first processing device 400. In the first state, each first detection module 300 is used to detect the purity of the first gas discharged from the corresponding first exhaust pipe 210; in the second state, the first processing device 400 is used to wash, cool and separate the first gas collected by the plurality of first exhaust pipes 210.

[0042] The above-mentioned electrolytic hydrogen production equipment is provided with a plurality of electrolytic cells 100 to electrolyze water to meet the higher hydrogen production demand. Each first exhaust pipe 210 is used to discharge the first gas (hydrogen or oxygen) electrolyzed in the corresponding electrolytic cell 100. In the first state, each first detection module 300 is connected to the corresponding first exhaust pipe 210, so that the first gas discharged from each first exhaust pipe 210 can be respectively sent to the corresponding first detection module 300 to respectively complete the purity detection of the first gas generated by each electrolytic cell 100. In the second state, each first exhaust pipe 210 is connected to the first processing device 400, so that the first gas discharged from each first exhaust pipe 210 can be collected and sent to the first processing device 400, so as to centrally complete the washing, cooling and gas-liquid separation of the first gas generated by all electrolytic cells 100. The first exhaust pipe 210 can be switched between the first state and the second state. Therefore, by switching the state of the first exhaust pipe 210, before the first processing device 400 performs washing, cooling and gas-liquid separation on the first gas, the first gas generated by the corresponding electrolytic cell 100 can be tested for gas purity by each first detection module 300 to determine whether the purity of the first gas generated by each electrolytic cell 100 is qualified. In this way, the problem of being unable to distinguish which electrolytic cell 100 has unqualified gas purity will not occur when washing, cooling and gas-liquid separation are performed first and then the purity test is performed together.

[0043] It should be noted that, in FIG1 , the green line represents the hydrogen flow path, the red line represents the oxygen flow path, the yellow line represents the coolant loop, and the blue line represents the water flow path, and the arrows on each line indicate the flow direction of the flow path.

[0044] In the embodiments of the present application, "plurality" refers to at least two, such as two, three, etc. For example, in the embodiment shown in FIG1, two electrolytic cells 100 are provided, and correspondingly, two sets of first exhaust pipes 210 corresponding thereto are provided, and the first detection device includes two sets of first detection modules 300 corresponding thereto. In other embodiments, the number of electrolytic cells 100, first exhaust pipes 210, and first detection modules 300 may be further increased.

[0045] 1 to 3 , in some embodiments, when the first detection module 300 detects that the purity of the first gas is not lower than a preset value, the corresponding first exhaust pipe 210 is configured to switch from the first state to the second state.

[0046] Specifically, the above-mentioned "preset value" can be set manually. Taking the first gas as hydrogen as an example, when the first detection module 300 detects that the purity of the first gas is not less than the preset value, it means that the purity of the hydrogen is high, that is, the oxygen content in the hydrogen is low, which meets the preparation requirements. At this time, the first exhaust pipe 210 can be switched from the first state to the second state, and the hydrogen with qualified purity generated by each electrolyzer 100 is passed into the first processing device 400, and operations such as washing, cooling and gas-liquid separation are performed on it. That is, before washing, cooling and gas-liquid separation of the first gas, the purity of the first gas generated by the corresponding electrolyzer 100 is detected by each first detection module 300, and after the detection is completed and the purity meets the requirements, the subsequent operation is performed. In this way, before the subsequent operation is performed, it can be distinguished which electrolyzer 100 produces the gas with unqualified purity, so as to check the cause, and after the purity is qualified, the subsequent operation is performed.

[0047] Referring to Figures 1, 3 and 4, in some embodiments, each first detection module 300 includes a first separation scrubber 310, a drying mechanism 320 and a purity detector 330 that are connected in sequence, wherein the first separation scrubber 310 and the corresponding first exhaust pipe 210 can be selectively connected, the drying mechanism 320 is used to dry the first gas discharged through the first separation scrubber 310, and the purity detector 330 is used to detect the purity of the first gas.

[0048] Specifically, the end of each first exhaust pipe 210 is connected with a detection branch pipe 211 and a processing branch pipe 212, and the detection branch pipe 211 and the processing branch pipe 212 are arranged in parallel. The first separation scrubber 310 and the corresponding detection branch pipe 211 can be selectively connected, and the first treatment device 400 and the processing branch pipe 212 at the end of each first exhaust pipe 210 can be selectively connected. Among them, the selective connection is realized by the opening and closing of the valves arranged on the detection branch pipe 211 and the processing branch pipe 212. When the first separation scrubber 310 and the corresponding detection branch pipe 211 are connected, the first gas generated by the corresponding electrolytic cell 100 discharged from the first exhaust pipe 210 can be discharged into the first separation scrubber 310 through the corresponding detection branch pipe 211 to perform gas-liquid separation and washing on the first gas. After the gas-liquid separation and washing are completed, the first gas flows into the drying mechanism 320 for drying, and after drying, flows into the purity detector 330 for purity detection. After the detection is completed, the first gas can be discharged to the outside.

[0049] If the purity detector 330 is used to detect the purity of hydrogen, when the oxygen content in the hydrogen is too high, the purity detector 330 will be damaged. Therefore, if the purity is detected to be unqualified, the first separation scrubber 310 and the corresponding detection branch pipe 211 can be disconnected to directly discharge the first gas to the outside, or the first gas can be discharged to the outside after passing through the first separation scrubber 310 or the drying mechanism 320. Similarly, if the purity detector 330 is used to detect the purity of oxygen, there are similar problems and the above operation can also be performed.

[0050] Referring to Figures 1, 3 and 4, in some embodiments, the drying mechanism 320 includes a plurality of dryers 321 connected in sequence, the dryer 321 has a drying chamber 322 for accommodating a desiccant, a plurality of baffles 323 extending from the side walls of the drying chamber 322 and arranged at intervals along its height direction, and any two adjacent baffles 323 in the height direction are disposed on two pairs of side walls of the drying chamber 322.

[0051] Specifically, the inlet and outlet of the dryer 321 are arranged at both ends of the dryer 321 in the height direction. The first gas entering the drying chamber 322 will flow through the desiccant and then be discharged to remove the moisture carried by the first gas after being washed by the first separation scrubber 310, thereby ensuring the accuracy of the next step of purity detection. Any two adjacent baffles 323 in the height direction are arranged on the two opposite side walls of the drying chamber 322, so that the first gas can be shielded and can only flow through the gap between the adjacent baffles 323, so that its flow path is a wavy line, so as to extend its flow path in the drying chamber 322, thereby drying more thoroughly.

[0052] In the embodiment shown in the drawings, the drying mechanism 320 includes two sequentially connected dryers 321. In other embodiments, the number of dryers 321 may also be increased.

[0053] 1 , 3 and 4 , in some embodiments, a flow meter 340 is provided between the drying mechanism 320 and the purity detector 330 .

[0054] Specifically, the flow meter 340 and the purity detector 330 are fixedly mounted on the mounting plate 350 to realize the integration of the two, so that the structure has a higher degree of integration, a more compact structure distribution, and a smaller occupied space. Before the first gas enters the purity detector 330, the flow rate is first detected by the flow meter 340. After the flow rate is stable, the inlet switch of the purity detector 330 is turned on to send the first gas therein for purity detection to improve the detection accuracy.

[0055] Referring to Figures 1 to 3, in some embodiments, the first processing device 400 includes a second separation scrubber 410, a cooler 420 and a gas-liquid separator 430 connected in sequence, wherein the second separation scrubber 410 and the first exhaust pipe 210 can be selectively connected, the cooler 420 is used to cool the first gas discharged through the second separation scrubber 410, and the gas-liquid separator 430 is used to separate the first gas and the liquid entrained therein.

[0056] Specifically, the second separation scrubber 410 and the processing branch pipe 212 at the end of each first exhaust pipe 210 can be selectively connected. When the second separation scrubber 410 is connected to the processing branch pipe 212, the first gas produced by the electrolytic cell 100 discharged from the first exhaust pipe 210 can be discharged into the second separation scrubber 410 through the processing branch pipe 212 to perform gas-liquid separation and washing on the first gas. An overflow pipe 4124 is connected between the cooler 420 and the second separation scrubber 410. After the gas-liquid separation and washing are completed, the first gas flows into the cooler 420 through the overflow pipe 4124 to cool down and cool down, so as to avoid the first gas with too high temperature being directly discharged and scalding the staff. A discharge pipe 450 is connected between the cooler 420 and the gas-liquid separator 430. After the first gas is cooled and the temperature reaches the emission standard, the first gas flows into the gas-liquid separator 430 through the discharge pipe 450 to perform gas-liquid separation to separate the dry first gas and the moisture carried when it is washed by the second separation scrubber 410. The gas-liquid separator 430 is connected to an exhaust main pipe 461 and a drain pipe 462, which are arranged in parallel. The dry first gas separated by the gas-liquid separator 430 is discharged through the exhaust main pipe 461, and the separated water is discharged through the drain pipe 462. A drain 463 is provided on the drain pipe 462. The on-off and flow rate of the drain pipe 462 can be adjusted by controlling the drain 463.

[0057] Referring to FIGS. 1 to 3 , in some embodiments, at least one of the first separation scrubber 310 and the second separation scrubber 410 includes a separation element 411 and a washing element 412. The separation element 411 has a separation chamber 4111, and a mixing inlet 4112 and a first overflow port 4113 connected to the separation chamber 4111. The mixing inlet 4112 is used to allow the first gas discharged from the first exhaust pipe 210 to flow into the separation chamber 4111, and the first overflow port 4113 is used to allow the first gas that has removed the entrained liquid in the separation chamber 4111 to be discharged. The washing element 412 has a washing chamber 4121, and a washing inlet 4122 and a second overflow port 4123 connected to the washing chamber 4121. The washing inlet 4122 and the first overflow port 4113 are connected to allow the first gas to pass below the level of the washing liquid in the washing chamber 4121, and the second overflow port 4123 is used to allow the first gas that overflows the level of the washing liquid to be discharged.

[0058] Specifically, the first separation scrubber 310 and the second separation scrubber 410 have the same structure, and the second separation scrubber 410 shown in FIG. 3 is used as an example for explanation. The mixing inlet 4112 is connected to the processing branch pipe 212, and the first gas produced by each electrolytic cell 100 discharged from the processing branch pipe 212 at the end of each first exhaust pipe 210 can flow into the separation chamber 4111 through the mixing inlet 4112, and gas-liquid separation is performed in the separation chamber 4111. After gas-liquid separation, the electrolyte carried by the first gas remains in the separation chamber 4111, and the separated first gas flows into the inlet pipe 4114 connected thereto through the first overflow port 4113. The inlet pipe 4114 extends into the washing chamber 4121 through the washing inlet 4122, and the washing chamber 4121 contains washing liquid, such as water. The inlet pipe 4114 extends below the liquid surface of the washing liquid to pass the first gas into the washing liquid for washing to remove impurities therein, and the clean first gas after washing overflows from the surface of the washing liquid and is discharged through the second overflow port 4123. Among them, the separation element 411 can directly select a component that can achieve gas-liquid separation in the prior art.

[0059] 1 to 3 , in some embodiments, the electrolytic hydrogen production equipment further includes a cooling liquid loop 500 for circulating cooling liquid, and a heat exchange device for providing low-temperature cooling liquid, and the heat exchange device and the cooler 420 are located on the cooling liquid loop 500 .

[0060] Specifically, the cooling liquid circuit 500 includes a liquid supply section 510 and a liquid return section 520, and a heat exchange device (omitted in the figure) is connected between the liquid supply section 510 and the liquid return section 520. The liquid supply section 510 is used to provide low-temperature cooling liquid to the cooler 420 to cool the cooler 420. The high-temperature cooling liquid that has heated up after absorbing the heat of the cooler 420 flows into the heat exchange device through the liquid return section 520 for heat exchange and cooling, and becomes a low-temperature cooling liquid again, and flows to the cooler 420 through the liquid supply section 510 again. In this way, the cooler 420 can be continuously cooled, so that it can continuously cool the first gas to ensure that the discharged first gas will not burn the staff due to excessive temperature. Among them, the cooling liquid can be water, or other liquids.

[0061] 1 to 3 , in some embodiments, when the first gas is hydrogen, two hydrogen branch pipes 440 are connected in parallel at the gas outlet of the gas-liquid separator 430 , one of the two hydrogen branch pipes 440 is used to collect hydrogen with qualified purity, and the other is used to discharge hydrogen with unqualified purity.

[0062] Specifically, when the first gas is hydrogen, two hydrogen branch pipes 440 are connected in parallel to the end of the exhaust main pipe 461, one of which is used to collect hydrogen with qualified purity and discharge it into a hydrogen bottle for storage, and the other is used to discharge hydrogen with unqualified purity. By controlling the opening and closing of the valves provided on the two hydrogen branch pipes 440, the first gas can be discharged into the required hydrogen branch pipe 440.

[0063] Referring to FIGS. 1 to 3, in some embodiments, the electrolytic hydrogen production equipment further includes a second detection device, a second processing device 620 and a plurality of second exhaust pipes 220, and the second detection device includes a plurality of second detection modules 610. Each second exhaust pipe 220 is connected to a corresponding electrolyzer 100 to discharge the generated second gas, one of the first gas and the second gas is oxygen, and the other is hydrogen. Each second detection module 610 is connected to a corresponding second exhaust pipe 220; each second exhaust pipe 220 is connected to the second processing device 620. Each second exhaust pipe 220 has a third state in which it is connected to the corresponding second detection module 610, and a fourth state in which it is connected to the second processing device 620. In the third state, each second detection module 610 is used to detect the purity of the second gas discharged from the corresponding second exhaust pipe 220; in the fourth state, the second processing device 620 washes, cools and separates the second gas collected by the plurality of second exhaust pipes 220.

[0064] Specifically, the structures of the second detection module 610 and the first detection module 300 are basically similar, and the structures of the second processing device 620 and the first processing device 400 are basically similar, which will not be described in detail here. In the above embodiment, before the first processing device 400 processes the first gas, each first detection module 300 can respectively perform gas purity detection on the first gas generated by the corresponding electrolytic cell 100 to determine whether the purity of the first gas generated by each electrolytic cell 100 is qualified; before the second processing device 620 processes the second gas, each second detection module 610 can respectively perform gas purity detection on the second gas generated by the corresponding electrolytic cell 100 to determine whether the purity of the second gas generated by each electrolytic cell 100 is qualified.

[0065] 1 to 3 , in some embodiments, the electrolytic hydrogen production equipment further includes a water tank 700 , which is used to provide water required for washing to each separation scrubber.

[0066] Specifically, the outlet of the water tank 700 is connected to a water supply pipe 710, which is divided into six branches, respectively sending water to the second separation scrubber 410 and the two first separation scrubbers 310, the separation scrubbers in the two second detection modules 610, and the separation scrubber in the second treatment device 620. Taking the first detection module 300 and the first treatment device 400 as an example, the liquid condensed from the first gas in the cooler 420 due to the temperature reduction can be discharged into the separation chamber 4111 through the fourth drainage branch pipe 724. The washing liquid (water) in one of the first separation scrubbers 310 can be discharged into the separation chamber 4111 through the fifth drainage branch pipe 725. In the second separation scrubber 410, the washing liquid (water) in the washing chamber 4121 can be discharged into the separation chamber 4111 through the first drainage branch pipe 721, and discharged together with the liquid in the separation chamber 4111 through the second drainage branch pipe 722. The washing liquid (water) in the other first separation washer 310 can be discharged through the third drainage branch pipe 723, and after being collected with the liquid discharged from the second drainage branch pipe 722, it is collected into the drainage pipe 462 from the drainage collection pipe 726 and then discharged together.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An electrolytic hydrogen production device, characterized in that: The electrolytic hydrogen production equipment comprises: A plurality of electrolytic cells, each for electrolyzing water; A plurality of first exhaust pipes, each of which is connected to a corresponding electrolytic cell to discharge a generated first gas, wherein the first gas is one of oxygen and hydrogen; A first detection device, comprising a plurality of first detection modules, each of which is connected to a corresponding first exhaust pipe; and a first processing device, each of the first exhaust pipes being connected to the first processing device; Each of the first exhaust pipes has a first state in which it is connected to the corresponding first detection module, and a second state in which it is connected to the first processing device; in the first state, each of the first detection modules is used to detect the purity of the first gas discharged from the corresponding first exhaust pipe; in the second state, the first processing device is used to wash, cool and separate the gas-liquid of the first gas introduced into the multiple first exhaust pipes.

2. The electrolytic hydrogen production equipment according to claim 1, characterized in that: When the first detection module detects that the purity of the first gas is not lower than a preset value, the corresponding first exhaust pipe is configured to switch from the first state to the second state.

3. The electrolytic hydrogen production equipment according to claim 1, characterized in that: Each of the first detection modules includes a first separation scrubber, a drying mechanism and a purity detector which are connected in sequence, wherein the first separation scrubber and the corresponding first exhaust pipe can be selectively connected, the drying mechanism is used to dry the first gas discharged through the first separation scrubber, and the purity detector is used to detect the purity of the first gas.

4. The electrolytic hydrogen production equipment according to claim 3, characterized in that: The drying mechanism comprises a plurality of dryers connected in sequence, each dryer having a drying chamber for accommodating a desiccant, a plurality of baffles extending from the side walls of the drying chamber and arranged at intervals along the height direction thereof, and any two adjacent baffles in the height direction are arranged on two pairs of side walls of the drying chamber.

5. The electrolytic hydrogen production equipment according to claim 3, characterized in that: A flow meter is provided between the drying mechanism and the purity detector.

6. The electrolytic hydrogen production equipment according to claim 3, characterized in that: The first treatment device includes a second separation scrubber, a cooler and a gas-liquid separator which are connected in sequence, wherein the second separation scrubber and the first exhaust pipe can be selectively connected, the cooler is used to cool the first gas discharged through the second separation scrubber, and the gas-liquid separator is used to separate the first gas from the liquid entrained therein.

7. The electrolytic hydrogen production equipment according to claim 6, characterized in that: At least one of the first separation scrubber and the second separation scrubber comprises: a separation element, comprising a separation chamber, and a mixing inlet and a first overflow port connected to the separation chamber, wherein the mixing inlet is used for allowing the first gas discharged from the first exhaust pipe to flow into the separation chamber, and the first overflow port is used for allowing the first gas to be discharged after removing the entrained liquid in the separation chamber; A washing element comprises a washing chamber, a washing inlet and a second overflow port connected to the washing chamber, wherein the washing inlet is connected to the first overflow port so as to allow the first gas to pass below the level of the washing liquid in the washing chamber, and the second overflow port is used to discharge the first gas that overflows the level of the washing liquid.

8. The electrolytic hydrogen production equipment according to claim 6, characterized in that: The electrolytic hydrogen production equipment also includes a cooling liquid loop for circulating cooling liquid, and a heat exchange device for providing low-temperature cooling liquid. The heat exchange device and the cooler are located on the cooling liquid loop.

9. The electrolytic hydrogen production equipment according to claim 6, characterized in that: When the first gas is hydrogen, two hydrogen branch pipes are connected in parallel at the gas outlet of the gas-liquid separator, one of the two hydrogen branch pipes is used to collect hydrogen with qualified purity, and the other is used to discharge hydrogen with unqualified purity.

10. The electrolytic hydrogen production equipment according to any one of claims 1 to 9, characterized in that: The electrolytic hydrogen production equipment also includes a second detection device, a second processing device and a plurality of second exhaust pipes, each of which is connected to a corresponding electrolytic cell to discharge the generated second gas, one of the first gas and the second gas is oxygen, and the other is hydrogen; the second detection device includes a plurality of second detection modules, each of which is connected to a corresponding second exhaust pipe; each of the second exhaust pipes is connected to the second processing device; Each of the second exhaust pipes has a third state in communication with the corresponding second detection module, and a fourth state in communication with the second processing device; In the third state, each second detection module is used to detect the purity of the second gas discharged from the corresponding second exhaust pipe; in the fourth state, the second processing device washes, cools and separates the second gas introduced by multiple second exhaust pipes.

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