Hydrogen production treatment device and hydrogen production system

Abstract

The utility model relates to a hydrogen production treatment device and a hydrogen production system. The hydrogen production treatment device comprises a shell, a separator arranged in the shell, a scrubber and a cooler arranged in the scrubber, and liquid and gas are preliminarily separated in the separator. The gas flowing upwards flows into the scrubber, so that the gas exchanges heat with a cooler in the scrubber, and steam mixed in the gas is further condensed into liquid and is separated from the gas again; meanwhile, the alkali liquor steam can be washed away by washing liquid such as pure water in the washer, so that liquid mixed in the gas is treated more thoroughly, and the purity of the gas is increased. The cooler is arranged in the washer, so that the cooler does not occupy extra space, the layout of the hydrogen production treatment device is more compact, and the occupied space is reduced. The cooler is arranged in the scrubber, so that not only is liquid in high-temperature gas cooled, but also the scrubbing solution is preheated, the subsequent scrubbing solution can be supplemented into the electrolytic bath, and the recycling of heat is realized.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production, and in particular to a hydrogen production processing device and a hydrogen production system. Background Art

[0002] With the rapid development of the hydrogen energy industry, large-scale water electrolysis hydrogen production has become the future development trend of green hydrogen. The water electrolysis hydrogen production device is mainly composed of an electrolyzer, a gas-liquid processor, and a gas purification device.

[0003] In existing water electrolysis hydrogen production devices, multiple components such as hydrogen-oxygen separators, scrubbers, gas-water separators, electrolyte heat exchangers, gas heat exchangers, and gas filters are all independently arranged, resulting in a large space occupied by the water electrolysis hydrogen production device. Utility Model Content

[0004] Based on this, it is necessary to provide a hydrogen production processing device to address the problem that the existing hydrogen production device occupies a large space.

[0005] A hydrogen production processing device is applied to a hydrogen production system, and the hydrogen production processing device comprises:

[0006] A shell body provided with a gas outlet;

[0007] A separator is arranged in the housing; the separator has a separation inlet and a separation outlet, and the separation inlet is used to introduce gas mixed with liquid;

[0008] a scrubber, the scrubber being disposed in the housing and located above the separator;

[0009] Cooler; the cooler is arranged in the scrubber; the cooler is used to perform heat exchange with the gas mixed with liquid to separate the gas and the liquid, the separated gas flows out through the gas outlet, and the separated liquid flows out through the separation outlet.

[0010] In one embodiment, the scrubber includes a first channel and a second channel connected to the first channel, and the flow paths of the gas in the first channel and the second channel are opposite;

[0011] The cooler is disposed in the first channel.

[0012] In one of the embodiments, at least one layer of first bubble refining net is disposed in the scrubber.

[0013] In one of the embodiments, a guide channel is further provided in the shell, and the guide channel is located above the separator and on the inner side of the cooler; the guide channel is used to guide the gas mixed with liquid in the separator to flow into the scrubber.

[0014] In one of the embodiments, a second bubble refinement net is provided between the guide channel and the scrubber.

[0015] In one of the embodiments, a dripping net is disposed in the housing, and the dripping net is located between the scrubber and the gas outlet.

[0016] In one embodiment, the separator includes a plurality of separation plates arranged at intervals, and gaps between adjacent separation plates form flow channels, and the flow channels are connected to the separation outlet.

[0017] In one of the embodiments, an overflow channel is provided in the shell, one end of the overflow channel is connected to the scrubber, and the other end of the overflow channel is connected to the separation outlet.

[0018] In one embodiment, the housing is provided with a cooling medium inlet and a cooling medium outlet connected to the cooler; the cooling medium outlet is located above the cooling medium inlet; and / or

[0019] The separation inlet is located above the separation outlet.

[0020] A hydrogen production system comprises the hydrogen production processing device as described above.

[0021] The above-mentioned hydrogen production processing device introduces the gas mixed with liquid such as alkali liquid into the separator through the separation inlet. The density of the liquid is greater than that of the air, and the density of the gas is less than that of the air, so the gas flows upward and the liquid flows downward, and the liquid and the gas are initially separated in the separator. Subsequently, the gas flowing upward flows into the scrubber. On the one hand, the cooler contains a cooling medium with a lower temperature, so that the gas exchanges heat with the cooler in the scrubber, and the steam mixed in the gas is further condensed into liquid and separated from the gas again; on the other hand, the alkali liquid steam will be washed away by the washing liquid in the scrubber, such as pure water, so that the liquid mixed in the gas is treated more thoroughly, thereby removing the liquid mixed in the gas and increasing the purity of the gas. Since the cooler is arranged in the scrubber, the cooler does not occupy additional space, making the layout of the hydrogen production processing device more compact and reducing the occupied space. At the same time, by arranging the cooler in the scrubber, not only the liquid in the high-temperature gas is cooled, but also the washing liquid is preheated. The subsequent washing liquid can be added to the electrolyzer to realize heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is an isometric view of a hydrogen production processing device provided in one embodiment of the present application.

[0023] FIG. 2 is a side view of the hydrogen production processing device shown in FIG. 1 .

[0024] FIG. 3 is a schematic diagram of the AA section of the hydrogen production processing device shown in FIG. 2 .

[0025] FIG. 4 is a side view of the hydrogen production processing device shown in FIG. 1 at another viewing angle.

[0026] FIG. 5 is a top view of the hydrogen production processing device shown in FIG. 1 .

[0027] Figure numbers: 100, hydrogen production processing device; 110, shell; 111, gas outlet; 112, guide channel; 113, second bubble refinement network; 114, overflow channel; 120, separator; 121, separation inlet; 122, separation outlet; 123, separation plate; 124, flow channel; 130, scrubber; 131, first channel; 132, second channel; 133, scrubbing liquid inlet; 140, cooler; 141, cooling medium inlet; 142, cooling medium outlet; 150, first bubble refinement network; 160, droplet catcher. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] During the water electrolysis process, the normal operating temperature of the electrolyzer is around 85°C, and the generated hydrogen (or oxygen) enters the separator together with the electrolyte in the form of gas-liquid mixture. When the bubbles burst, a large number of fine droplets are generated to form alkaline mist, which is discharged with the hydrogen (or oxygen), affecting the quality of the gas, the possible purification treatment downstream, and the analysis of the gas quality by the instrument. Therefore, it is particularly important to separate the alkaline solution carried in the gas.

[0035] Based on this, an embodiment of the present application provides a hydrogen production processing device 100 applied to a hydrogen production system, referring to Figures 1 and 3, the hydrogen production processing device 100 includes a shell 110, a separator 120, a scrubber 130 and a cooler 140, the shell 110 is provided with a gas outlet 111; the separator 120 is arranged in the shell 110; the separator 120 has a separation inlet 121 and a separation outlet 122, the separation inlet 121 is used to introduce gas mixed with liquid; the scrubber 130 is arranged in the shell 110 and is located above the separator 120; the cooler 140 is arranged in the scrubber 130; the cooler 140 is used to perform heat exchange with the gas mixed with liquid to separate the gas and the liquid, the separated gas flows out through the gas outlet 111, and the separated liquid flows out through the separation outlet 122.

[0036] The above-mentioned hydrogen production processing device 100 introduces the gas mixed with liquid into the separator 120 through the separation inlet 121. The density of the liquid is greater than that of the air, and the density of the gas is less than that of the air. Therefore, the gas flows upward and the liquid flows downward. The liquid and the gas will be initially separated in the separator 120. The separated gas may still carry some alkali liquid vapor or droplets. Subsequently, the gas flowing upward flows into the scrubber 130. On the one hand, the cooler 140 contains a cooling medium with a lower temperature, so that the gas and the cooler 140 in the scrubber 130 perform heat exchange, and the vapor mixed in the gas is further condensed into liquid and separated from the gas again; on the other hand, the alkali liquid vapor will be washed away by the washing liquid in the scrubber 130, such as pure water, so that the liquid mixed in the gas is treated more thoroughly, thereby removing the liquid mixed in the gas and increasing the purity of the gas. Since the cooler 140 is arranged in the scrubber 130, the cooler 140 does not occupy additional space, making the layout of the hydrogen production processing device 100 more compact and reducing the occupied space. At the same time, by arranging the cooler 140 in the scrubber 130, not only the liquid in the high-temperature gas is cooled, but also the scrubbing liquid is preheated. The scrubbing liquid can be subsequently replenished into the electrolytic cell to realize heat recovery and utilization.

[0037] The mixed liquid may be alkali liquid vapor or water vapor, etc. Further, the separation outlet 122 may be connected to the electrolyzer of the hydrogen production system, so that the separated alkali liquid can be recycled into the electrolyzer, which can effectively slow down the loss of alkaline substances in the electrolyzer; at the same time, it can also reduce the waste of alkali resources, ensure the concentration of alkali liquid in the electrolyzer, and thus ensure the unit gas production of the electrolyzer.

[0038] 3 and 4 , in some embodiments, the separation inlet 121 is located above the separation outlet 122. Since the separation outlet 122 is used to allow the condensed liquid to flow out, the height of the separation outlet 122 is set lower than the height of the separation inlet 121 to prevent the condensed liquid from being discharged from the separation inlet 121, thereby ensuring the stability of the liquid outflow.

[0039] Referring to FIGS. 3 and 4 , in one embodiment, the shell 110 is provided with a cooling medium inlet 141 and a cooling medium outlet 142 which are connected to the cooler 140; the cooling medium outlet 142 is located above the cooling medium inlet. The cooling medium inlet 141 and the cooling medium outlet 142 are both provided on the side wall of the shell 110. By providing the cooling medium outlet 142 above the cooling medium inlet, the flow resistance of the cooling medium in the cooler 140 can be increased, thereby extending the heat exchange time between the cooling medium and the gas mixed with liquid, making the heat exchange more sufficient, improving the condensation effect of the liquid mixed in the gas, and further improving the gas-liquid separation effect. The cooling medium can be a gaseous cooling medium such as nitrogen, etc., or a liquid cooling medium such as water, ethylene glycol solution, etc.

[0040] As shown in FIG4 , in some embodiments, the cooler 140 may specifically include a cooling pipe, and the cooling pipe may include a curved section, and the curved section may be one or more of a spiral type, an S-type, and a vortex type. The curved section can extend the length of the cooling pipe, thereby extending the flow path of the cooling medium in the cooling pipe, so that the heat exchange time between the cooling medium and the gas mixed with liquid is longer, thereby improving the condensation effect on the liquid, and then the separation effect of the gas and the liquid. The material of the cooling pipe is preferably a material with high thermal conductivity, such as stainless steel, copper, aluminum, titanium, etc. A cooling pipe with high thermal conductivity can speed up the heat exchange between the cooling medium and the gas mixed with liquid, thereby improving the cooling efficiency.

[0041] Referring to FIG. 3 , in one embodiment, the separator 120 includes a plurality of separation plates 123 arranged at intervals, and the gaps between adjacent separation plates 123 form flow channels 124, and the flow channels 124 are connected to the separation outlet 122. Under the wall attachment effect, the liquid mixed in the gas can adhere to the separation plates 123, so that the liquid is more likely to gather and flow downward to the outlet of the separator 120; at the same time, the separation plates 123 can play a certain guiding role, so that the separated liquid can flow along the wall surface of the separation plates 123 to the outlet of the separator 120, thereby improving the separation effect of gas and liquid and reducing the water content in the gas.

[0042] Referring to FIG. 3 , in one embodiment, the scrubber 130 includes a first channel 131 and a second channel 132 connected to the first channel 131, and the gas flows in opposite paths in the first channel 131 and the second channel 132; the cooler 140 is disposed in the first channel 131. By providing the first channel 131 and the second channel 132 with opposite flow paths, the gas flow path is extended, thereby reducing the gas flow rate, so that the gas mixed with liquid is evenly dispersed in the scrubbing liquid and fully contacts the cooler 140 and the scrubbing liquid, and the contact area between the gas and the scrubbing liquid is increased, thereby improving the adsorption and cooling effect of liquid impurities in the gas, improving the gas-liquid separation effect, and thereby reducing the water content in the gas.

[0043] Referring to FIG. 3 , in one embodiment, at least one layer of the first bubble refinement net 150 is provided in the scrubber 130. The first bubble refinement net 150 is provided to disperse and refine large bubbles into small bubbles, so as to facilitate the separation of gas and liquid. The first bubble refinement net 150 is provided with two layers, one layer is located at the outlet of the scrubber 130, and the other layer is located in the second channel 132 and close to the outlet of the scrubber 130, so as to improve the gas-liquid separation efficiency.

[0044] Referring to FIGS. 1 to 2 , further, a washing liquid inlet 133 is provided on the side wall of the housing 110, and the washing liquid inlet 133 is connected to the washer 130, so as to realize the replenishment of the washing liquid. The shape of the housing 110 can be a rectangular parallelepiped, a cylinder, etc. In the present embodiment, the top and the bottom of the housing 110 are roughly hemispherical, and the middle part of the housing 110 is roughly cylindrical. The material of the housing 110 is preferably a corrosion-resistant material to prevent the housing 110 from being damaged by corrosion, so as to ensure that the housing 110 can operate stably and also extend the service life of the housing 110.

[0045] Referring to FIG. 3 , in one embodiment, a guide channel 112 is further provided in the housing 110, and the guide channel 112 is located above the separator 120 and inside the cooler 140; the guide channel 112 is used to guide the gas mixed with liquid in the separator 120 to flow into the scrubber 130. By providing the guide channel 112 and arranging it inside the cooler 140, on the one hand, the flow path of the gas can be extended, and on the other hand, the gas and the cooler 140 also have sufficient heat exchange time, thereby improving the condensation effect of the liquid impurities, so that the separated droplets can flow into the separator 120 under the action of their own gravity, thereby reducing the water content in the gas.

[0046] Referring to FIG3 , in one embodiment, a second bubble refinement net 113 is provided between the guide channel 112 and the scrubber 130. The outlet of the guide channel 112 is provided with the second bubble refinement net 113, through which large bubbles are preliminarily dispersed to facilitate separation of gas and liquid.

[0047] Referring to FIG3 , in one embodiment, a dripping net 160 is disposed in the housing 110, and the dripping net 160 is located between the scrubber 130 and the gas outlet 111. By providing the dripping net 160, trace liquid mixed in the gas is captured again, further reducing the water content of the gas finally discharged from the gas outlet 111, thereby improving the gas purity.

[0048] Referring to FIG. 3 , in one embodiment, an overflow channel 114 is provided in the housing 110, one end of the overflow channel 114 is connected to the scrubber 130, and the other end is connected to the separation outlet 122. When the washing liquid in the scrubber 130 absorbs part of the alkali solution and water vapor, the liquid level of the washing liquid will be higher than the overflow channel 114, so that it can enter the separator 120 from the overflow channel 114, and flow back to the electrolytic cell through the separation outlet 122, so as to realize the recycling of the alkali solution and the washing liquid.

[0049] Furthermore, an embodiment of the present application also provides a hydrogen production system (not shown), including an electrolyzer and the hydrogen production processing device 100 as described above. Among them, the separation outlet 122 can be connected to the electrolyzer. The hydrogen production system uses the hydrogen production processing device 100 so that the liquid mixed in the discharged gas is treated more thoroughly, thereby increasing the purity of the gas. Since the cooler 140 is arranged in the scrubber 130, the cooler 140 does not occupy additional space, making the layout of the hydrogen production system more compact and reducing the occupied space. At the same time, by arranging the cooler 140 in the scrubber 130, not only the liquid in the high-temperature gas is cooled, but also the scrubbing liquid is preheated. The scrubbing liquid can be subsequently added to the electrolyzer to achieve heat recovery.

[0050] 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.

[0051] 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. A hydrogen production processing device, characterized in that: Applied to a hydrogen production system, the hydrogen production processing device comprises: A housing (110) is provided with a gas outlet (111); A separator (120) is arranged in the housing (110); the separator (120) has a separation inlet (121) and a separation outlet (122); the separation inlet (121) is used to introduce gas mixed with liquid; a scrubber (130), the scrubber (130) being arranged in the housing (110) and located above the separator (120); A cooler (140); the cooler (140) is arranged in the scrubber (130); the cooler (140) is used to perform heat exchange with the gas mixed with the liquid so as to separate the gas and the liquid, the separated gas flows out through the gas outlet (111), and the separated liquid flows out through the separation outlet (122).

2. The hydrogen production processing device according to claim 1, characterized in that: The scrubber (130) comprises a first channel (131) and a second channel (132) communicating with the first channel (131), and the flow paths of gas in the first channel (131) and the second channel (132) are opposite; The cooler (140) is arranged in the first channel (131).

3. The hydrogen production processing device according to claim 1, characterized in that: At least one layer of first bubble refining net (150) is arranged in the scrubber (130).

4. The hydrogen production processing device according to claim 1, characterized in that: A guide channel (112) is also provided in the shell (110); the guide channel (112) is located above the separator (120) and inside the cooler (140); the guide channel (112) is used to guide the gas mixed with liquid in the separator (120) to flow into the scrubber (130).

5. The hydrogen production processing device according to claim 4, characterized in that: A second bubble refining net (113) is provided between the flow guide channel (112) and the scrubber (130).

6. The hydrogen production processing device according to claim 1, characterized in that: A dripping net (160) is arranged in the housing (110), and the dripping net (160) is located between the scrubber (130) and the gas outlet (111).

7. The hydrogen production processing device according to claim 1, characterized in that: The separator (120) comprises a plurality of separation plates (123) arranged at intervals, wherein gaps between adjacent separation plates (123) form flow channels (124), and the flow channels (124) are in communication with the separation outlet (122).

8. The hydrogen production processing device according to claim 1, characterized in that: An overflow channel (114) is provided in the housing (110); one end of the overflow channel (114) is in communication with the scrubber (130), and the other end of the overflow channel (114) is in communication with the separation outlet (122).

9. The hydrogen production processing device according to claim 1, characterized in that: The housing (110) is provided with a cooling medium inlet (141) and a cooling medium outlet (142) which are in communication with the cooler (140); the cooling medium outlet (142) is located above the cooling medium inlet; and / or The separation inlet (121) is located above the separation outlet (122).

10. A hydrogen production system, characterized in that: It comprises the hydrogen production processing device as described in any one of claims 1 to 9.

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