Washer and hydrogen production system

Abstract

The utility model discloses a washer and a hydrogen production system, the washer is used for washing gas in the hydrogen production system and comprises a shell, a communicating pipe and a gas distribution assembly, a washing cavity is formed at the bottom of the inner side of the shell, and the shell is provided with a gas inlet and a gas outlet; the communicating pipe is provided with a first end and a second end, the first end is communicated with the gas inlet, and the second end extends into the washing cavity; the gas distribution assembly is arranged in the washing cavity and communicated with the second end, a plurality of gas outlets are formed in the gas distribution assembly, and the gas outlets are arranged in the radial direction and the axial direction of the shell in a staggered mode. According to the technical scheme, the gas washing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, in particular to a scrubber and a hydrogen production system. Background Art

[0002] As a green and pollution-free energy carrier, hydrogen energy can achieve efficient conversion of hydrogen energy into electrical energy through water electrolysis technology. It is expected to serve as an important regulating means of wind and photovoltaic power generation to better serve people's daily life and industrial production.

[0003] In the prior art, the hydrogen and oxygen produced by the electrolyzer still carry alkali solution after separation, and need to be washed by a scrubber to reduce the load of the back-end equipment and save costs. However, with the increase in the scale of hydrogen production, the poor washing effect of the scrubber caused by factors such as uneven air distribution has become more and more serious, which in turn leads to poor quality of hydrogen entering the purification system (high alkali content), which is very likely to cause poisoning of the purification system catalyst, affecting the efficiency of the purification system and increasing the investment cost of the purification system catalyst. Utility Model Content

[0004] The main purpose of the utility model is to provide a scrubber, aiming to improve the scrubbing efficiency of gas.

[0005] To achieve the above-mentioned purpose, the scrubber proposed in the utility model is used to scrub the gas in the hydrogen production system, and the scrubber comprises:

[0006] The shell has a washing chamber formed on the inner bottom, and the shell is provided with a gas inlet and a gas outlet;

[0007] a connecting pipe having a first end and a second end, wherein the first end is connected to the gas inlet and the second end extends into the washing chamber; and

[0008] A gas distribution component is placed in the washing chamber and connected to the second end. The gas distribution component is provided with a plurality of gas outlets, and each of the gas outlets is staggered along the radial direction and the axial direction of the shell.

[0009] Optionally, the gas distribution assembly includes an annular tube arranged around the outer periphery of the second end, a plurality of the annular tubes are arranged at intervals along the extension direction of the second end, the contour lines of the annular tubes have different radii, and the gas outlet is arranged on the annular tube.

[0010] Optionally, in a direction toward the first end, the radius of each of the annular tubes increases layer by layer.

[0011] Optionally, at least a portion of the axis of the air outlet is inclined toward the second end, and / or at least a portion of the axis of the air outlet is inclined in a direction away from the second end.

[0012] Optionally, the pipe radius of the annular tube is R, the distance between two adjacent annular tubes in the radial direction of the shell is A, and the distance between two adjacent annular tubes in the axial direction of the shell is B, and the inclination angle between the axis of the air outlet and the horizontal direction is P0, and P2-P1<P0<P2+P1;

[0013] in,

[0014] Optionally, at least part of the gas outlet is configured as a drain outlet, which is opened facing the bottom wall of the washing chamber and is used to drain the liquid in the gas distribution assembly.

[0015] Optionally, the scrubber further comprises a defoaming assembly, wherein the defoaming assembly is built into the scrubbing chamber and is located on a side of the gas distribution assembly close to the first end.

[0016] Optionally, the defoaming assembly includes a first defoaming orifice plate and a second defoaming orifice plate arranged at intervals along the axial direction of the shell, the first defoaming orifice plate is located between the gas distribution assembly and the second defoaming orifice plate, and in the axial direction of the shell, the first through hole of the first defoaming orifice plate and the second through hole of the second defoaming orifice plate are staggered.

[0017] Optionally, the scrubber further comprises a cooling device, and the cooling device is arranged on the outer wall of the shell.

[0018] Optionally, the cooling device is configured as a half-tube jacket, the half-tube jacket comprising a jacket body, a circulating coolant inlet and a circulating coolant outlet provided on the jacket body, and the half-tube jacket is wound around the outer wall of the shell.

[0019] Optionally, a hydrophilic structure is provided on the inner wall of the scrubber, and the hydrophilic structure is at least located on a path where the gas flowing out of the scrubbing chamber diffuses to the gas outlet.

[0020] Optionally, the scrubber further comprises a gas-liquid separation component, which is connected to an edge of the gas outlet and is used to perform at least one gas-liquid separation operation on the gas flowing into the gas-liquid separation component.

[0021] Optionally, the gas-liquid separation component includes a shell and a liquid collector, the shell is connected to the shell body and is provided with a first port and a second port, and the liquid collector is located between the first port and the second port.

[0022] Optionally, the liquid collector comprises a primary liquid catching screen and a secondary liquid catching screen. In the axial direction of the shell, the thickness of the primary liquid catching screen is H1, the thickness of the secondary liquid catching screen is H2, and H2=2H1.

[0023] Optionally, the washing chamber is provided with a liquid replenishing port for replenishing washing liquid into the washing chamber.

[0024] Optionally, the scrubber further includes a liquid replenishing pipeline, which is connected to the liquid replenishing port and is provided with a liquid replenishing through hole.

[0025] Optionally, the infusion pipeline includes a main pipeline and a plurality of branch pipelines, the main pipeline is connected to the infusion port, the branch pipeline is connected to the main pipeline and extends in a direction away from the main pipeline, and the branch pipeline is provided with the infusion through hole.

[0026] Optionally, the branch pipelines are arranged at intervals along the circumference of the main pipeline;

[0027] And / or, the branch pipelines are arranged at intervals along the radial direction of the main pipeline.

[0028] Optionally, the liquid infusion holes are provided in plurality and are arranged at intervals along the circumference of the branch pipeline;

[0029] And / or, the liquid infusion holes are provided in plurality and are arranged at intervals along the extension direction of the branch pipeline.

[0030] Optionally, in the extension direction of the branch pipelines, the corresponding fluid infusion holes on two adjacent branch pipelines are staggered.

[0031] Optionally, the shell comprises an upper head, a cylinder and a lower head connected in sequence, the upper head is provided with the gas outlet, and the cylinder is provided with the gas inlet and overflow hole;

[0032] The washing chamber includes a first chamber and a second chamber. The first chamber is formed in the lower head and has the gas distribution assembly built in. The second chamber is formed in the cylinder and is located between the overflow hole and the lower head. The overflow hole is connected to the separator in the hydrogen production system.

[0033] The utility model also provides a hydrogen production system, which comprises the scrubber as described above.

[0034] In the technical solution of the utility model, the gas distribution component is built into the washing chamber of the shell. The washing chamber is located at the bottom of the shell, and the second end of the connecting pipe extends into the washing chamber. The gas distribution component can be arranged away from the gas inlet, so that the gas ejected from the gas outlet of the gas distribution component rises from bottom to top, thereby realizing the re-separation of the alkali liquid entrained in the gas and effectively extending the time for the gas to flow through the washing liquid, thereby improving the washing efficiency; combined with the staggered arrangement of the gas outlets on the gas distribution component in the radial and axial directions of the shell, the washing space of the washing chamber can be fully utilized, the dead zone of the washing liquid can be reduced, and the rapid agglomeration of the gas after the jet can be reduced, thereby improving the distribution uniformity of the gas during washing, thereby improving the mixing degree of the gas and the washing liquid, and further improving the washing efficiency of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0036] Figure 1 This is a schematic structural diagram of an embodiment of a scrubber of the utility model;

[0037] Figure 2 for Figure 1 Schematic diagram of the parameters of the gas distribution component;

[0038] Figure 3 for Figure 2 A three-dimensional schematic diagram of a gas distribution assembly;

[0039] Figure 4 for Figure 1 Structural schematic diagram of the cooling device and the hydrophilic structure;

[0040] Figure 5 for Figure 1 Schematic diagram of the structure of the liquid trap;

[0041] Figure 6 for Figure 1 Schematic diagram of the assembly of the liquid replenishment pipeline and the gas distribution component;

[0042] Figure 7 for Figure 6 Schematic diagram of the structure of the fluid replenishment pipeline;

[0043] Figure 8 for Figure 1 Front view of the fluid infusion line.

[0044] Description of Figure Numbers:

[0045]

[0046]

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral 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 the present invention can be understood according to specific circumstances.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0052] The utility model provides a scrubber used for scrubbing gas in a hydrogen production system.

[0053] Reference Figures 1 to 5 In an embodiment of the utility model, the scrubber includes a shell 10, a connecting pipe 20 and a gas distribution assembly 30; a washing chamber 11 is provided at the inner bottom of the shell 10, and the shell 10 is provided with a gas inlet 131 and a gas outlet 121; the connecting pipe 20 has a first end 21 and a second end 22, the first end 21 is connected to the gas inlet 131, and the second end 22 extends into the washing chamber 11; the gas distribution assembly 30 is placed in the washing chamber 11 and connected to the second end 22, and the gas distribution assembly 30 is provided with a plurality of gas outlets 311, and each of the gas outlets 311 is staggered along the radial and axial directions of the shell 10, such a configuration helps to improve the gas washing effect in the hydrogen production system, thereby reducing the load of the back-end equipment and reducing the cost.

[0054] The hydrogen production system includes hydrogen production equipment, a separator, a scrubber, and a back-end device. The separator is used to separate the hydrogen and oxygen produced by the hydrogen production equipment. The scrubber mainly plays the role of washing the gas, and the back-end device can play a purification role. Among them, the scrubber is provided with a gas inlet 131 and a gas outlet 121. The first end 21 of the connecting pipe 20 passes through the gas inlet 131 and is connected to the separator to ensure that the gas enters the shell 10 to complete the washing. The gas outlet 121 is connected to the back-end device to further purify or collect the washed gas. The gas inlet 131 can be opened on the top wall, side wall or bottom wall of the shell 10, and the gas outlet 121 can be opened on the top wall or side wall of the shell 10.

[0055] Specifically, the connecting pipe 20 extends the second end 22 connected to the gas distribution component 30 into the washing chamber 11, wherein the washing chamber 11 stores washing liquid (such as desalted water), and the gas distribution component 30 is built into the washing chamber 11 and immersed in the washing liquid. When the gas is discharged from the connecting pipe 20 to the washing chamber 11, because the washing chamber 11 is located at the bottom of the shell 10, the gas outlet 121 is set away from the washing chamber 11, and the gas ejected from the gas outlet 311 of the gas distribution component 30 rises from bottom to top, thereby realizing the re-separation of the alkali liquid entrained in the gas, and effectively extending the time for the gas to flow through the washing liquid, thereby improving the washing efficiency; and, by staggering the radial and axial directions of the gas outlets 311 in the shell 10, the spatial distribution is formed, which can fully utilize the washing space of the washing chamber 11 and reduce the dead zone of the washing liquid, and can also reduce the rapid aggregation of the gas after the jet, and evenly distribute the gas in the washing chamber 11 to improve the mixing degree of the gas and the washing liquid. Such a setting helps to further improve the washing efficiency of the gas.

[0056] In the technical solution of the present utility model, the gas distribution component 30 is built into the washing chamber 11 of the shell 10. The washing chamber 11 is located at the bottom of the shell 10, and the second end of the connecting pipe 20 extends into the washing chamber 11. The gas distribution component 30 can be arranged away from the gas inlet 131, so that the gas ejected from the gas outlet 311 of the gas distribution component 30 rises from bottom to top, thereby realizing the re-separation of the alkali liquid entrained in the gas and effectively extending the time for the gas to flow through the washing liquid, thereby improving the washing efficiency; with the staggered arrangement of the gas outlets 311 on the gas distribution component 30 in the radial and axial directions of the shell 10, the washing space of the washing chamber 11 can be fully utilized, the dead zone of the washing liquid can be reduced, and the rapid agglomeration of the gas after the jet can be reduced, thereby improving the distribution uniformity of the gas during washing, thereby improving the mixing degree of the gas and the washing liquid, and further improving the washing efficiency of the gas.

[0057] Reference Figures 1 to 3 In one embodiment, the gas distribution assembly 30 includes an annular tube 31 arranged around the outer periphery of the second end 22, and a plurality of the annular tubes 31 are arranged at intervals along the extension direction of the second end 22, and the radius of the contour line of each annular tube 31 is different. The gas outlet 311 is arranged on the annular tube 31 to ensure that the gas outlets 311 located on each annular tube 31 can be staggered from each other in the radial and axial directions of the shell 10, thereby greatly reducing the possibility of convergence of the gases ejected from the annular tubes 31, improving the distribution uniformity of the gas during washing, and improving the washing effect of the gas.

[0058] Specifically, each annular tube 31 is connected to the second end 22 and is arranged near the end of the second end 22 away from the first end 21, so as to ensure that each annular tube 31 is reliably distributed in the washing chamber 11 and fully utilize the washing space of the washing chamber 11, and also help to extend the time for the gas to flow through the washing liquid; wherein, the contour lines corresponding to each annular tube 31 are all circular, which can reduce the fluid resistance and reduce the collision between the gas and the inner wall of the annular tube 31, improve the smoothness of the flow of the gas in the annular tube 31, and at the same time, can evenly distribute the gas flowing from the second end 22 to the annular tube 31, thereby improving the uniformity of the distribution of the gas flow ejected by the gas distribution component 30. In addition, it can also match the specific shape structure of the washing chamber 11, for example, each annular tube 31 adopts a different arrangement order and / or adopts a contour line of a different shape to match the structure of the washing chamber 11, so that the washing space of the washing chamber 11 can be fully utilized, so as to achieve the purpose of reducing the dead zone of the washing liquid and improving the gas washing effect, and at the same time, reasonably reduce the occupied space of the shell 10 and reduce the cost.

[0059] In the direction toward the first end 21, the radius of each of the annular tubes 31 may be gradually increased or decreased, or may be increased first and then decreased. However, considering that the further the second end 22 extends downward, the greater the pressure drop, that is, the greater the fluid resistance, preferably, in one embodiment, in the direction toward the first end 21, the radius of each of the annular tubes 31 increases layer by layer, that is, Figure 1 As shown, in the axial direction of the shell 10, the length of the radially extending annular tube 31 gradually becomes shorter from top to bottom. At this time, the less water needs to be discharged from the annular tube 31, the smaller the gas resistance is, which facilitates the smooth injection of gas. In addition, the staggered arrangement of the gas outlets 311 in the radial and axial directions of the shell 10 causes the injected airflow to be spatially distributed in an inverted cone, which enables the gas to be evenly distributed in the washing chamber 11 to a great extent, reduces the rapid aggregation of the gas after the jet, improves the mixing efficiency of the gas and the washing liquid in the washing chamber 11, and enhances the gas washing effect.

[0060] Reference Figure 2 In one embodiment, at least part of the axis of the gas outlet 311 is inclined toward the second end 22, and / or at least part of the axis of the gas outlet 311 is inclined in a direction away from the second end 22, so as to reduce the influence of horizontal resistance on the gas, and at the same time, reduce the rapid coalescence of the gas jet, improve the mixing degree of the gas and the washing liquid, and thus improve the gas washing effect. Among them, the two gas outlets 311 inclined in different directions can be arranged in pairs and symmetrically distributed along the axial direction, and then, the two pairs of gas outlets 311 can be arranged in multiple pairs at intervals along the extension direction of the ring tube 31, so as to fully increase the number of gas outlets 311 on the ring tube 31, and at the same time ensure the staggered arrangement of each gas outlet 311.

[0061] Specifically, the pipe radius of the annular tube 31 is R, the distance between two adjacent annular tubes 31 in the radial direction of the shell 10 is A, and the distance between two adjacent annular tubes 31 in the axial direction of the shell 10 is B, and the inclination angle between the axis of the air outlet 311 and the horizontal direction is P0, P2-P1<P0<P2+P1;

[0062] in,

[0063] It can be understood that when the axis of the gas outlet 311 is inclined in the direction away from the second end 22, the inclination angle between the axis of the gas outlet 311 and the horizontal direction satisfies: P2-P1<P0<P2+P1, ensuring that, except for the annular tube 31 located on the uppermost layer, the gas ejected from the gas outlet 311 of the remaining annular tubes 31 can be ejected to the annular tube 31 of the upper layer, thereby reducing the possibility of the gas ejected from the two adjacent annular tubes 31 intersecting, reliably reducing the rapid coalescence of the gas jet, and improving the degree of mixing of the gas and the washing liquid.

[0064] Reference Figure 3In one embodiment, at least part of the gas outlet 311 is configured as a drain outlet, which is opened facing the bottom wall of the washing chamber 11 and is used to empty the liquid in the gas distribution component 30. It can be understood that the gas distribution component 30 includes a plurality of annular pipes 31, and each annular pipe 31 is provided with an outlet 311 on the pipe wall close to the bottom wall of the washing chamber 11. When the hydrogen production system is shut down, the gas outlet 311 is configured as a drain outlet, and the fluid in the annular pipe 31 can be discharged from the gas distribution component 30 through the drain outlet, wherein a plurality of drain outlets can be arranged at intervals to improve the emptying efficiency.

[0065] Optionally, in one embodiment, the scrubber further includes a defoaming assembly 40, which is built into the washing chamber 11 and is located on the side of the gas distribution assembly 30 close to the first end 21. It can be understood that the defoaming assembly 40 is immersed in the washing liquid. When the gas is ejected from the gas distribution assembly 30, the gas smoothly ascends under the action of the defoaming assembly 40, which helps to improve the gas washing effect.

[0066] like Figure 1 As shown, in one embodiment, the defoaming assembly 40 includes a first defoaming orifice plate 41 and a second defoaming orifice plate 42 which are spaced apart along the axial direction of the shell 10, and the first defoaming orifice plate 41 is located between the gas distribution assembly 30 and the second defoaming orifice plate 42, and in the axial direction of the shell 10, the first through hole of the first defoaming orifice plate 41 and the second through hole of the second defoaming orifice plate 42 are staggered, which has a better bubble breaking effect and improves the mixing degree of the gas and the washing liquid.

[0067] Specifically, the first defoaming orifice plate 41 is located between the gas distribution component 30 and the second defoaming orifice plate 42. During the upward gas washing process, small bubbles will gather and merge into large bubbles. When the large bubbles pass through the first defoaming orifice plate 41, the first defoaming orifice plate 41 can break the large bubbles. At the same time, it has a rectifying effect on the upward bubble flow, thereby reducing the risk of deviation caused by the aggregation of large bubbles and improving the gas washing effect. The first defoaming orifice plate 41 and the cavity wall of the washing chamber 11 are fixed by, for example, welding; the second defoaming orifice plate 42 is arranged near the cavity mouth of the washing chamber 11, that is, near the liquid surface of the washing liquid. Before the gas diffuses out of the washing chamber 11, the small bubbles after rectification and breaking need to pass through the second defoaming orifice plate 42 for secondary breaking, which can further improve the bubble breaking effect and improve the mixing degree of the gas and the washing liquid. The second defoaming orifice plate 42 is arranged near the liquid surface, which can also prevent the washing liquid from generating a large number of bubbles due to airflow disturbance, thereby stabilizing the liquid surface and reducing the fluctuation amplitude of the liquid surface. Of course, in other embodiments, the defoaming assembly 40 only includes the first defoaming orifice plate 41 or the second defoaming orifice plate 42, which can also play the role of breaking bubbles.

[0068] The staggered arrangement of the first through holes of the first defoaming hole plate 41 and the second through holes of the second defoaming hole plate 42 helps to prolong the contact time between the bubbles and the second defoaming hole plate 42, improves the bubble breaking effect, and at the same time, fully mixes the gas and the washing liquid to improve the gas washing effect.

[0069] Optionally, in one embodiment, the scrubber further comprises a cooling device, and the cooling device is disposed on the outer wall of the shell 10 to reduce the temperature inside the scrubber, ensure that the temperature of the scrubbing liquid is appropriate, and ensure the scrubbing effect of the gas.

[0070] Specifically, Figure 4 As shown, the cooling device is configured as a half-pipe jacket 50, and the half-pipe jacket 50 includes a jacket body 51, a circulating coolant inlet 52 and a circulating coolant outlet 53 arranged on the jacket body 51. The half-pipe jacket 51 is arranged around the outer wall of the shell 10, and its cross-section is semicircular. The circulating coolant inlet 52 is located above the circulating coolant outlet 53, which is used for the circulating coolant to flow downward in rotation, thereby cooling the wall surface of the shell 10. Compared with the prior art, a galvanized iron shell is provided, and the middle is filled with aluminum silicate fiber felt to act as an anti-scalding layer. The shell can meet the anti-scalding requirements, but it will keep the scrubber warm, which is not conducive to the heat dissipation of the scrubber. When the temperature of the scrubbing liquid in the scrubber is high, it is easy to cause a decrease in the washing effect. The half-pipe jacket 50 can effectively reduce the risk of heat accumulation inside the scrubber and improve the washing effect of the gas.

[0071] Optionally, in one embodiment, a hydrophilic structure 60 is provided on the inner wall of the scrubber, and the hydrophilic structure 60 is at least located on the path where the gas flowing out of the scrubbing chamber 11 diffuses to the gas outlet 121. In conjunction with the inner wall cooled by the cooling device, the hydrophilic structure 60 is in a low-temperature state, and can condense the alkaline liquid in the gas and fall back into the scrubbing chamber 11, thereby achieving gas de-alkalization.

[0072] Specifically, Figure 4 As shown, the hydrophilic structure 60 is configured as a hydrophilic coating and is disposed on the inner wall. Since the washed gas has a high temperature when it diffuses out of the washing chamber 11, in the process of diffusing to the gas outlet 121, after the high-temperature gas contacts the hydrophilic coating in a low-temperature state, a large number of tiny droplets will condense on the surface of the inner wall, and a large number of tiny droplets will aggregate into large droplets and flow back to the washing chamber 11, thereby improving the de-alkalization effect of the gas. The hydrophilic coating is at least located on the path from the gas flowing out of the washing chamber 11 to the gas outlet 121. It can be understood that the hydrophilic coating can be located only above the washing chamber 11, and the gas flowing out of the washing chamber 11 is de-alkalized. The hydrophilic coating can also be disposed on the wall of the washing chamber 11. Of course, other structures that can achieve gas de-alkalization are also applicable to this application and are not limited here.

[0073] Reference Figure 1 and Figure 5 In one embodiment, the scrubber also includes a gas-liquid separation component 70, which is connected to the edge of the gas outlet 121 and is used to perform at least one gas-liquid separation operation on the gas flowing into the gas-liquid separation component 70, thereby improving the dealkalization effect of the alkali liquid entrained in the gas after washing, improving the gas quality, reducing the load of the back-end equipment, ensuring the safe operation of the back-end equipment, and reducing the operation and maintenance cost of the hydrogen production system.

[0074] Specifically, in one embodiment, the gas-liquid separation component 70 includes a shell 71 and a liquid collector 72, the shell 71 is connected to the shell 10, and is provided with a first port 711 and a second port 712, the liquid collector 72 is located between the first port 711 and the second port 712, the gas that has been dealkalized by the hydrophilic structure 60 enters the shell through the first port 711, and obtains a gas of good quality under the separation effect of the liquid collector 72, the gas flows to the back-end equipment through the second port 712, and can be purified or stored in the next process. A convex portion for fixing the liquid collector 72 is provided in the shell, and a plurality of convex portions can be arranged at intervals to improve the assembly stability of the liquid collector 72 and ensure the separation effect of the liquid collector 72 on the gas.

[0075] Reference Figure 5 In one embodiment, the liquid collector 72 includes a primary liquid collector screen 721 and a secondary liquid collector screen 722. In the axial direction of the shell 10, the thickness of the primary liquid collector screen 721 is H1, and the thickness of the secondary liquid collector screen 722 is H2, H2=2H1, wherein the primary liquid collector screen 721 is arranged near the gas outlet 121 (the first port 711), and can be configured as a 316L pure metal screen, and the secondary liquid collector screen 722 is arranged on the side of the primary liquid collector screen 721 away from the first port 711, and can be configured as a 316L metal and PTFE (polytetrafluoroethylene) ) is used, according to the gradual enhancement of the liquid capture capacity, to gradually separate and remove the tiny droplets in the gas, and under the same working conditions, the mixed wire mesh has higher removal efficiency and precision for micron-sized droplets than the metal wire mesh, for example, the removal efficiency of 3-micron droplets can reach 99.9%, thereby achieving efficient gas washing; further, the thickness ratio of the first-level liquid capture wire mesh 721 and the second-level liquid capture wire mesh 722 is limited to H2=2H1, which can extend the time for the gas to flow through the liquid capture device 72, and at the same time, enhance the ability to remove the alkaline droplets entrained by the gas after washing, and effectively improve the quality of the back-end gas. In other embodiments, the liquid capture device 72 includes but is not limited to the wire mesh liquid capture device 72.

[0076] Optionally, in one embodiment, the shell 71 is further provided with a maintenance port 713, and the maintenance port 713 is detachably connected to the cover 73, so as to facilitate maintenance and replacement of the liquid collector 72. The cover 73 and the shell 71 can be assembled by threaded connection, mortise and tenon joints, etc.

[0077] Combined with reference Figure 1 , Figures 6 to 8 In one embodiment, the washing chamber 11 is provided with a liquid replenishing port 141 for replenishing washing liquid into the washing chamber 11. By replenishing washing liquid with a lower temperature (such as desalted water) into the washing chamber 11 through the liquid replenishing port 141, the washing liquid with a lower temperature is mixed with the high-temperature washing liquid to reduce the temperature of the washing liquid, thereby ensuring the washing effect on the gas.

[0078] Furthermore, in one embodiment, the washer also includes a liquid replenishing pipeline 80, which is connected to the liquid replenishing port 141 and is provided with a liquid replenishing through hole 83. With such a configuration, the low-temperature washing liquid flowing into the liquid replenishing port 141 can be passed into the liquid replenishing pipeline 80 and ejected into the washing chamber 11 through the liquid replenishing through hole 83. Compared with directly replenishing the washing liquid from the liquid replenishing port 141, it can not only guide the low-temperature washing liquid, but also speed up the mixing speed of the low-temperature washing liquid and the high-temperature washing liquid, which helps to quickly reduce the temperature of the washing liquid in the washing chamber 11 and improve the washing effect of the washer.

[0079] like Figures 6 to 8 As shown, the replenishment pipeline 80 includes a main pipeline 81 and multiple branch pipelines 82, the main pipeline 81 is connected to the replenishment port 141, the branch pipeline 82 is connected to the main pipeline 81 and extends in a direction away from the main pipeline 81, and the branch pipeline 82 is provided with the replenishment hole 83. It can be understood that each branch pipeline 82 can be connected to the main pipeline 81 through a transfer pipeline and is evenly arranged in the washing chamber 11, wherein the branch pipeline 82 is provided with a replenishment hole 83, and a plurality of replenishment holes 83 can be provided, so that the low-temperature washing liquid at the replenishment port 141 can be ejected at any position on the washing chamber 11, and the direction and height of each ejected water flow are different, thereby reducing the occurrence of dead zones, ensuring that the high-temperature washing liquid at any position in the washing chamber 11 is mixed and cooled with the corresponding low-temperature washing liquid, and reliably avoiding the phenomenon of slow cooling of the washing liquid, achieving a rapid drop in the temperature of the washing liquid in the washing chamber 11, and at the same time, significantly improving the washing effect and reducing the load on the back-end equipment.

[0080] Reference Figure 7In one embodiment, each of the branch pipes 82 is arranged at intervals along the circumference of the main pipe 81; and / or each of the branch pipes 82 is arranged at intervals along the radial direction of the main pipe 81. With this arrangement, each branch pipe 82 is spatially distributed, wherein each branch pipe 82 is evenly spaced in the washing chamber 11, which can improve the uniformity of distribution of the low-temperature washing liquid in the washing chamber 11, thereby improving the mixing effect of the low-temperature washing liquid and the high-temperature washing liquid, and improving the washing effect of the scrubber.

[0081] Reference Figure 7 In one embodiment, a plurality of the liquid replenishing holes 83 are provided, and are arranged at intervals along the circumference of the branch pipeline 82; and / or a plurality of the liquid replenishing holes 83 are provided, and are arranged at intervals along the extension direction of the branch pipeline 82. In this way, as many liquid replenishing holes 83 as possible can be arranged in the radial and axial directions of the branch pipeline 82 to fully mix the low-temperature washing liquid and the high-temperature washing liquid, so as to achieve the purpose of reliable and uniform cooling.

[0082] Furthermore, in one embodiment, in the extension direction of the branch pipeline 82, on two adjacent branch pipelines 82, the corresponding fluid infusion holes 83 on the two branch pipelines 82 are staggered. Figure 8 As shown, the distance between the two liquid replenishment holes 83 located on two adjacent branch pipelines 82 is h, so as to ensure that the ejected water flows are staggered with each other, effectively reduce the possibility of the ejected water flows from the two adjacent branch pipelines 82 intersecting, and improve the cooling efficiency.

[0083] Reference Figure 1 In one embodiment, the shell 10 includes an upper head 12, a cylinder 13 and a lower head 14 connected in sequence, the upper head 12 is provided with the gas outlet 121, and the cylinder 13 is provided with the gas inlet 131 and the overflow hole 132;

[0084] The washing chamber 11 includes a first chamber and a second chamber. The first chamber is formed in the lower head 14 and has the gas distribution assembly 30 built therein. The second chamber is formed in the cylinder 13 and is located between the overflow hole 132 and the lower head 14. The overflow hole 132 is connected to the separator in the hydrogen production system.

[0085] It can be understood that the uppermost annular tube 31 in the gas distribution assembly 30 is close to the weld line position of the cylinder 13 and the lower head 14, and does not exceed the position of the weld line. With the inverted cone distribution of each annular tube 31, the gas distribution assembly 30 can further make full use of the first cavity in the lower head 14, which helps to reduce the height of the shell 10. Of course, in other embodiments, part of the gas distribution assembly 30 can be partially located in the cylinder 13. A support seat 90 can be connected to the outside of the lower head 14 to support the scrubber.

[0086] The gas inlet 131 and the gas outlet 121 are arranged away from the washing chamber 11 to prevent the washing liquid from flowing out through the gas inlet 131 and the gas outlet 121. The overflow hole 132 is arranged close to the second chamber. When the low-temperature washing liquid is replenished into the washing chamber 11 through the liquid replenishing port 141, the low-temperature washing liquid is mixed with the high-temperature washing liquid to achieve a cooling effect. At the same time, part of the washing liquid (washing liquid mixed with alkali solution) overflows back into the separator through the overflow hole 132 to realize water replenishment of the hydrogen production system.

[0087] After separation by the separator of the hydrogen production system, the gas generated by electrolysis of water enters the washing chamber 11 through the connecting pipe 20. After the gas reaches the second end 22 of the connecting pipe 20, it is uniformly ejected through the gas outlet 311 of the gas distribution component 30, and is evenly distributed in the washing chamber 11 to mix with the washing liquid to achieve gas washing. Then, the gas goes up from bottom to top, passing through the first defoaming orifice plate 41 and the second defoaming orifice plate 42 in turn, improving the bubble crushing effect and gas washing effect. Then, the gas diffused from the washing chamber 11 is de-alkalied with the cooperation of the cooling device and the hydrophilic structure 60, and flows upward steadily. The gas enters the gas separation component through the gas outlet 121 to perform at least one gas-liquid separation operation, thereby obtaining a higher quality gas. During the washing process, low-temperature washing liquid can be added to the washing chamber 11 through the liquid replenishment port 141, and after mixing the high-temperature washing liquid, the washing liquid mixed with alkali liquid flows back to the separator through the overflow hole 132 to achieve water replenishment of the hydrogen production system.

[0088] The utility model also proposes a hydrogen production system, which includes a scrubber. The specific structure of the scrubber refers to the above-mentioned embodiment. Since the hydrogen production system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0089] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A scrubber for scrubbing gas in a hydrogen production system, characterized in that: include: The shell has a washing chamber formed on the inner bottom, and the shell is provided with a gas inlet and a gas outlet; A connecting pipe having a first end and a second end, wherein the first end is connected to the gas inlet and the second end extends into the washing chamber; as well as A gas distribution component is placed in the washing chamber and connected to the second end. The gas distribution component is provided with a plurality of gas outlets, and each of the gas outlets is staggered along the radial direction and the axial direction of the shell.

2. The scrubber according to claim 1, characterized in that The gas distribution component includes an annular tube arranged around the outer periphery of the second end. A plurality of the annular tubes are arranged at intervals along the extension direction of the second end. The radius of the contour line of each annular tube is different. The gas outlet is arranged on the annular tube.

3. The scrubber according to claim 2, characterized in that In the direction toward the first end, the radius of each of the ring tubes increases layer by layer.

4. The scrubber according to claim 2, characterized in that The axis of at least part of the air outlet is inclined toward the second end, and / or the axis of at least part of the air outlet is inclined in a direction away from the second end.

5. The scrubber according to claim 4, characterized in that The pipe radius of the annular tube is R, the distance between two adjacent annular tubes in the radial direction of the shell is A, and the distance between two adjacent annular tubes in the axial direction of the shell is B, and the inclination angle between the axis of the air outlet and the horizontal direction is P0, P2-P1<P0<P2+P1; in, 6. The scrubber according to claim 2, characterized in that At least part of the gas outlet is configured as a drain port, which is opened facing the bottom wall of the washing chamber and is used to drain the liquid in the gas distribution assembly.

7. The scrubber according to claim 1, characterized in that The scrubber further comprises a defoaming assembly, which is built into the scrubbing chamber and is located on a side of the gas distribution assembly close to the first end.

8. The scrubber according to claim 7, characterized in that The defoaming assembly includes a first defoaming orifice plate and a second defoaming orifice plate which are spaced apart along the axial direction of the shell, the first defoaming orifice plate is located between the gas distribution assembly and the second defoaming orifice plate, and in the axial direction of the shell, the first through holes of the first defoaming orifice plate and the second through holes of the second defoaming orifice plate are staggered.

9. The scrubber according to claim 1, characterized in that The scrubber further comprises a cooling device, and the cooling device is arranged on the outer wall of the shell.

10. The scrubber according to claim 9, characterized in that The cooling device is configured as a half-tube jacket, which includes a jacket body, a circulating coolant inlet and a circulating coolant outlet arranged on the jacket body, and the half-tube jacket is wound around the outer wall of the shell.

11. The scrubber according to claim 1, characterized in that A hydrophilic structure is provided on the inner wall of the scrubber, and the hydrophilic structure is at least located on the path where the gas flowing out of the scrubbing chamber diffuses to the gas outlet.

12. The scrubber according to claim 1, characterized in that The scrubber also includes a gas-liquid separation component, which is connected to the edge of the gas outlet and is used to perform at least one gas-liquid separation operation on the gas flowing into the gas-liquid separation component.

13. The scrubber according to claim 12, characterized in that The gas-liquid separation component comprises a shell and a liquid collector. The shell is connected to the housing and is provided with a first port and a second port. The liquid collector is located between the first port and the second port.

14. The scrubber according to claim 13, characterized in that The liquid collector comprises a primary liquid-catching screen and a secondary liquid-catching screen. In the axial direction of the shell, the thickness of the primary liquid-catching screen is H1, and the thickness of the secondary liquid-catching screen is H2, where H2=2H1.

15. The scrubber according to claim 1, characterized in that The washing chamber is provided with a liquid replenishing port for replenishing washing liquid into the washing chamber.

16. The scrubber according to claim 15, characterized in that The scrubber further comprises a liquid replenishing pipeline, which is communicated with the liquid replenishing port and is provided with a liquid replenishing through hole.

17. The scrubber according to claim 16, characterized in that The infusion pipeline includes a main pipeline and a plurality of branch pipelines. The main pipeline is connected to the infusion port. The branch pipeline is connected to the main pipeline and extends in a direction away from the main pipeline. The branch pipeline is provided with the infusion holes.

18. The scrubber according to claim 17, characterized in that The branch pipelines are arranged at intervals along the circumference of the main pipeline; And / or, the branch pipelines are arranged at intervals along the radial direction of the main pipeline.

19. The scrubber according to claim 17, characterized in that The liquid infusion holes are provided in plurality and are arranged at intervals along the circumference of the branch pipeline; And / or, the liquid infusion holes are provided in plurality and are arranged at intervals along the extension direction of the branch pipeline.

20. The scrubber according to claim 17, wherein: In the extending direction of the branch pipelines, the corresponding fluid infusion holes on two adjacent branch pipelines are staggered.

21. The scrubber according to claim 1, characterized in that The shell comprises an upper head, a cylinder and a lower head connected in sequence, the upper head is provided with the gas outlet, and the cylinder is provided with the gas inlet and overflow hole; The washing chamber includes a first chamber and a second chamber. The first chamber is formed in the lower head and has the gas distribution assembly built in. The second chamber is formed in the cylinder and is located between the overflow hole and the lower head. The overflow hole is connected to the separator in the hydrogen production system.

22. A hydrogen production system, characterized in that: Comprising a scrubber as claimed in any one of claims 1 to 21.

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