Cleaning device for water electrolysis product gas and water electrolysis system
By replacing the traditional packing design with mixing and heat exchange components in the water electrolysis system, the problems of small operating range and high height of the water electrolysis system are solved, enabling wider application and higher efficiency and energy saving.
Patent Information
- Application Number
- CN202522305561.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Existing water electrolysis systems have a limited operating range and their cleaning devices are too tall, making them unsuitable for applications in fully off-grid environments and northern regions.
A mixing component replaces the packing material in the traditional separator. The mixing component receives the product gas to be cleaned and fresh replenishment water, forms a mixture, and then separates the clean product gas in the separator. The heat exchange component is used to achieve preliminary cooling and heat recovery.
It improves the adaptability of the operating range, reduces the overall height of the cleaning device, expands the application range, and enhances water electrolysis efficiency and energy saving effect.
Smart Images
Figure CN223688466U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of water electrolysis hydrogen production, especially relates to a water electrolysis product gas cleaning device and water electrolysis system. BACKGROUND
[0002] In the field of water electrolysis hydrogen production, the water electrolysis system includes an electrolytic tank and a cleaning device, water is electrolyzed in the electrolytic tank to produce hydrogen and oxygen, the hydrogen and oxygen have high temperature and corrosive liquid, if not treated, the corrosive liquid can corrode downstream equipment, and the corrosive liquid in the high-temperature product gas needs to be washed by using a washing liquid in the cleaning device, and the hydrogen and oxygen are cooled at the same time, wherein the washing liquid usually uses fresh water.
[0003] The cleaning device in the prior art usually has a filler arranged in the interior, the filler is used to mix the hydrogen or oxygen and the fresh water, the conventional design using the filler to wash has certain limitations on the operation range, and sufficient residence time and contact surface also need to be provided to achieve the target, so that the height of the cleaning device cannot be reduced. However, the development direction of the current water electrolysis system is off-grid, and there is no need to use thermal power, and green hydrogen is produced by coupling renewable energy power generation such as wind energy and solar energy. Since the renewable energy fluctuates greatly, the operation range is very large, but the conventional design using the filler to wash is difficult to meet the requirement of a larger operation range. In addition, when the application site is in a northern region, the cleaning device is usually placed indoors in the northern region, so the cleaning device using the conventional filler has certain requirements on the height. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problem that the operation range of the water electrolysis system in the prior art is small and the height of the cleaning device thereof is high, and provides an energy-saving water electrolysis product gas cleaning device and water electrolysis system.
[0005] The utility model solves the above technical problems through the following technical scheme:
[0006] The utility model provides a water electrolysis product gas cleaning device, the water electrolysis product gas cleaning device includes a separation tank, and the water electrolysis product gas cleaning device further includes:
[0007] A mixing assembly is used for receiving product gas to be cleaned and fresh water, and the mixing assembly is used for mixing the product gas to be cleaned and the fresh water to form a mixture.
[0008] A first passage is connected between the mixing assembly and the separation tank, the first passage is used for guiding the mixture into the separation tank, and the separation tank is used for separating clean product gas from the mixture.
[0009] In the present scheme, the packing in the conventional separation tank is replaced by a mixing assembly for receiving the product gas to be cleaned and fresh make-up water, mixing the product gas to be cleaned with the fresh make-up water to form a mixture, and introducing the mixture into the separation tank through a first passage and separating the clean product gas in the separation tank, thereby completing the washing of the corrosive liquid in the product gas to be cleaned and simultaneously cooling the product gas to be cleaned. The use of the mixing assembly can meet the requirements of a large operating range and has better adaptability. Meanwhile, the device is arranged outside the separation tank, and the separation tank does not need to be provided with packing, so that the overall height of the water electrolysis product gas cleaning device can be reduced to adapt to lower height limit requirements and have a wider application range.
[0010] Preferably, the water electrolysis product gas cleaning device is used in a water electrolysis system having an electrolysis tank, and the water electrolysis product gas cleaning device further comprises:
[0011] a heat exchange assembly provided with a product gas to be cleaned inlet for introducing the high-temperature product gas to be cleaned from the electrolysis tank, the high-temperature product gas to be cleaned being preliminarily cooled after flowing through the heat exchange assembly to form the product gas to be cleaned;
[0012] a second passage connecting the heat exchange assembly and the mixing assembly, the mixing assembly or the second passage being provided with a fresh make-up water inlet;
[0013] a third passage connecting the separation tank and the heat exchange assembly, the separation tank being used to separate the mixture into the clean product gas and intermediate make-up water, and the third passage being used to introduce the intermediate make-up water into the heat exchange assembly, and the heat exchange assembly being capable of exchanging heat between the intermediate make-up water and the high-temperature product gas to be cleaned to form hot make-up water;
[0014] a fourth passage connecting the heat exchange assembly and the electrolysis tank, the fourth passage being used to finally introduce the hot make-up water into the electrolysis tank.
[0015] The high-temperature product gas to be cleaned generated by electrolysis of the electrolysis tank is preliminarily cooled in the heat exchange assembly to form the product gas to be cleaned, the product gas to be cleaned is introduced into the mixing assembly through the second passage, the product gas to be cleaned and the fresh make-up water are mixed in the mixing assembly to form a mixture, the mixture is introduced into the separation tank through the first passage between the mixing assembly and the separation tank, the mixture is separated into the clean product gas and the intermediate make-up water in the separation tank, the intermediate make-up water flows into the heat exchange assembly through the third passage between the separation tank and the heat exchange assembly, and the intermediate make-up water exchanges heat with the high-temperature product gas to be cleaned in the heat exchange assembly to form the hot make-up water, and the hot make-up water is introduced into the electrolysis tank for water electrolysis, so that the heat in the high-temperature product gas to be cleaned can be used to heat the make-up water, the temperature of the electrolysis water entering the electrolysis tank is increased, the electrolysis efficiency of the water electrolysis is improved, and the energy-saving effect is achieved.
[0016] Preferably, the heat exchange assembly comprises a containing cavity and a first mixing device arranged in the containing cavity, the high-temperature product gas to be cleaned flows through the first mixing device to form the preliminarily cooled product gas to be cleaned, and the intermediate supplementary water flows into the containing cavity from the third passage and exchanges heat with the high-temperature product gas to be cleaned flowing through the heat exchanger.
[0017] The high-temperature product gas to be cleaned flows through the first mixing device to form the preliminarily cooled product gas to be cleaned, the product gas to be cleaned flows into the mixing assembly from the first passage, the intermediate supplementary water flows into the containing cavity from the third passage, the intermediate supplementary water exchanges heat with the high-temperature product gas to be cleaned flowing through the first mixing device in the containing cavity, the intermediate supplementary water absorbs the heat of the high-temperature product gas to be cleaned to form the hot supplementary water, and the hot supplementary water flows into the electrolytic cell from the containing cavity to participate in water electrolysis. The above structure can realize heat exchange between the high-temperature product gas to be cleaned and the intermediate supplementary water in a relatively simple structure, and the high-temperature product gas to be cleaned and the intermediate supplementary water are not directly contacted, thereby improving safety.
[0018] Preferably, the first mixing device comprises a first mixing pipeline and a plurality of first mixing units fixed in the first mixing pipeline, the plurality of first mixing units are sequentially arranged along the flow direction, and the plurality of first mixing units cut and mix the fluid flowing through the first mixing pipeline.
[0019] In the present scheme, the plurality of first mixing units are sequentially arranged along the flow direction, so that heat exchange between the intermediate supplementary water and the high-temperature product gas to be cleaned is more sufficient, the heat exchange effect is improved, and the water electrolysis efficiency and energy saving effect are further improved.
[0020] Preferably, the mixing assembly comprises a plurality of second mixing devices, and the plurality of second mixing devices are sequentially and serially arranged along the flow direction.
[0021] In the present scheme, the plurality of second mixing devices are sequentially and serially arranged along the flow direction, so that the product gas to be cleaned and the fresh supplementary water are mixed multiple times in the plurality of second mixing devices, the product gas to be cleaned and the fresh supplementary water are mixed more sufficiently, and the washing and cooling effects of the product gas to be cleaned are improved.
[0022] Preferably, the second mixing device comprises a second mixing pipeline and a plurality of second mixing units fixed in the second mixing pipeline, the plurality of second mixing units are sequentially arranged along the flow direction, and the plurality of second mixing units cut and mix the fluid flowing through the second mixing pipeline.
[0023] In the scheme, by sequentially arranging multiple second mixing units along the flow direction, the mixing effect of the product gas to be cleaned and the fresh supplementary water can be further improved, so that the product gas to be cleaned and the fresh supplementary water are mixed more fully, and the washing and cooling effect of the product gas to be cleaned is further improved.
[0024] Preferably, multiple second mixing devices are arranged in the horizontal direction, and multiple second mixing devices are sequentially connected by arc-shaped pipelines.
[0025] In each second mixing device, multiple second mixing units are arranged in the vertical direction and along the same straight line.
[0026] In the scheme, by arranging multiple second mixing devices in the horizontal direction, sequentially connecting multiple second mixing devices by arc-shaped pipelines, and arranging multiple second mixing units in the vertical direction and along the same straight line in each second mixing device, the overall structure of the mixing assembly is more compact, the volume of the product gas cleaning device of water electrolysis is reduced, and the occupied space is smaller. At the same time, the vertically arranged second mixing units are also more conducive to the flow mixing of the product gas to be cleaned and the fresh supplementary water.
[0027] Preferably, multiple second mixing devices are arranged in the horizontal direction, and multiple second mixing devices are sequentially connected by arc-shaped pipelines.
[0028] In each second mixing device, multiple second mixing units are arranged in the horizontal direction and along the same straight line.
[0029] In the scheme, by arranging multiple second mixing devices in the horizontal direction, sequentially connecting multiple second mixing devices by arc-shaped pipelines, and arranging multiple second mixing units in the horizontal direction and along the same straight line in each second mixing device, the overall structure of the mixing assembly is also more compact, the volume of the product gas cleaning device of water electrolysis is reduced, and the occupied space is smaller.
[0030] Preferably, a gas-liquid separator is arranged in the separation tank, the outlet of the mixing assembly is communicated with the gas-liquid separator, and the gas-liquid separator is used to separate the mixture into intermediate product gas and intermediate supplementary water.
[0031] And / or, the product gas cleaning device of water electrolysis further comprises a pump, and the pump is used to pump the intermediate supplementary water into the heat exchange assembly.
[0032] And / or, a wire mesh demister is further arranged in the separation tank, and the wire mesh demister is used to remove liquid in the intermediate product gas to obtain the clean product gas.
[0033] In the scheme, by setting a gas-liquid separator in the separation tank, the mixture flows from the mixing assembly into the gas-liquid separator, and is separated into clean product gas and intermediate makeup water by the gas-liquid separator. In addition, the separated intermediate makeup water is pumped into the heat exchange assembly by the pump, so that sufficient flow power can be provided for the intermediate makeup water, and the water electrolysis product gas cleaning device runs more smoothly. By setting a wire mesh demister in the separation tank, the clean product gas flows through the wire mesh demister and removes liquid in the wire mesh demister before flowing out of the separation tank, so that the purity of the clean product gas can be improved.
[0034] The utility model also provides a water electrolysis system, water electrolysis system includes water electrolysis product gas's cleaning device and electrolytic cell.
[0035] In the scheme, the water electrolysis system includes a water electrolysis product gas cleaning device and an electrolytic cell. The electrolytic cell generates a high-temperature product gas to be cleaned, which flows into the water electrolysis product gas cleaning device for washing and cooling, and separates clean product gas and intermediate makeup water.
[0036] The utility model has the following positive progress effects:
[0037] The mixing assembly is used to receive the product gas to be cleaned and fresh makeup water, and mix the cleaned product gas with the fresh makeup water to form a mixture. The mixture is then introduced into the separation tank through the first passage and separated into clean product gas in the separation tank, thereby completing the washing of the corrosive liquid in the product gas to be cleaned and simultaneously cooling the product gas to be cleaned. The use of the mixing assembly can meet the requirements of a large operating range, and has better adaptability. At the same time, the equipment is located outside the separation tank, and no packing is needed in the separation tank, thereby reducing the overall height of the water electrolysis product gas cleaning device to adapt to lower height limit requirements and have a wider application range. BRIEF DESCRIPTION OF DRAWINGS
[0038] Figure 1 It is a structural schematic view of the water electrolysis system according to the embodiment 1 of the utility model.
[0039] Figure 2 It is a side view structural schematic view of the water electrolysis product gas cleaning device according to the embodiment 1 of the utility model.
[0040] Figure 3 It is a top view structural schematic view of the water electrolysis product gas cleaning device according to the embodiment 2 of the utility model.
[0041] Explanation of reference signs:
[0042] Water electrolysis system 100
[0043] Electrolytic cell 110
[0044] Water supply device 120
[0045] Cooler 130
[0046] Gas tank 140
[0047] Cooling water tank 150
[0048] Separation device 160
[0049] Heat exchange device 170
[0050] Filter 180
[0051] Alkali tank 190
[0052] Water electrolysis product gas cleaning device 200
[0053] Separation tank 300
[0054] Gas-liquid separator 310
[0055] Wire mesh demister 320
[0056] Mixture inlet 330
[0057] Intermediate make-up water outlet 340
[0058] Clean product gas outlet 350
[0059] Heat exchange assembly 400
[0060] Containing cavity 410
[0061] First mixing device 420
[0062] First mixing pipeline 421
[0063] First mixing unit 422
[0064] Intermediate make-up water inlet 430
[0065] Hot make-up water outlet 440
[0066] To-be-cleaned high-temperature product gas inlet 450
[0067] To-be-cleaned product gas outlet 460
[0068] Mixing assembly 500
[0069] Second mixing device 510
[0070] Second mixing pipeline 511
[0071] Second mixing unit 512
[0072] To-be-cleaned product gas inlet 520
[0073] Fresh water intake 530
[0074] Pump 600
[0075] First Passage 710
[0076] Second Pathway 720
[0077] Third Pathway 730
[0078] Fourth Pathway 740 Detailed Implementation
[0079] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the following embodiments.
[0080] Example 1
[0081] like Figure 1 As shown, this embodiment provides a water electrolysis system 100, which includes a water electrolysis product gas cleaning device 200 and an electrolysis cell 110.
[0082] The high-temperature product gas to be cleaned generated by electrolysis in electrolytic cell 110 flows into the water electrolysis product gas cleaning device 200. In the water electrolysis product gas cleaning device 200, it is washed and cooled, and clean product gas and intermediate makeup water are separated. The intermediate makeup water then exchanges heat with the high-temperature product gas to be cleaned in the heat exchange component 400 to form hot makeup water. The hot makeup water is introduced into electrolytic cell 110 from the water electrolysis product gas cleaning device 200. In this way, the heat of the high-temperature product gas to be cleaned is used to improve the electrolysis efficiency of electrolytic cell 110, and at the same time, it achieves energy saving effect.
[0083] like Figure 2 As shown, the water electrolysis product gas cleaning device 200 includes a separation tank 300 and a mixing component 500. The mixing component 500 receives the product gas to be cleaned and fresh makeup water, and mixes the product gas to be cleaned with the fresh makeup water to form a mixture. The water electrolysis product gas cleaning device 200 also includes a first passage 710 connecting the mixing component and the separation tank. The first passage 710 is used to introduce the mixture into the separation tank 300, and the separation tank 300 is used to separate the mixture into clean product gas and intermediate makeup water.
[0084] The mixing assembly 500 is used to replace the filler in the conventional separation tank, and is used to receive the product gas to be cleaned and fresh make-up water, and mix the product gas to be cleaned and the fresh make-up water to form a mixture, and then the mixture is introduced into the separation tank 300 through the first passage 710 and separated into clean product gas and intermediate make-up water in the separation tank 300, so as to complete the washing of the corrosive liquid in the product gas to be cleaned, and at the same time, the product gas to be cleaned is cooled. The use of the mixing assembly 500 can meet the requirements of a large operating range, and has higher adaptability. At the same time, the device is arranged outside the separation tank 300, and the separation tank 300 does not need to be provided with a filler, so that the overall height of the water electrolysis product gas cleaning device can be reduced, so as to adapt to lower height limit requirements, and the application range is wider.
[0085] The water electrolysis product gas cleaning device 200 further comprises a heat exchange assembly 400, a second passage 720, a third passage 730 and a fourth passage 740. The heat exchange assembly 400 is provided with a product gas to be cleaned inlet 450 for introducing the high-temperature product gas to be cleaned from the electrolysis tank 110. After the product gas to be cleaned flows through the heat exchange assembly 400, the product gas to be cleaned is preliminarily cooled. The second passage 720 connects the heat exchange assembly 400 and the mixing assembly 500. The mixing assembly 500 or the second passage 720 is provided with a fresh make-up water inlet 530. The third passage 730 connects the separation tank 300 and the heat exchange assembly 400, and is used to introduce the intermediate make-up water into the heat exchange assembly 400. The heat exchange assembly 400 can use the product gas to be cleaned to heat exchange the intermediate make-up water to form hot make-up water. The fourth passage 740 connects the heat exchange assembly 400 and the separation device 160, and is used to finally introduce the hot make-up water into the electrolysis tank 110 through the separation device 160.
[0086] In the embodiment, the second passage 720 is provided with a product gas to be cleaned inlet 520. The high-temperature product gas to be cleaned generated by electrolysis of the electrolysis tank 110 is preliminarily cooled in the heat exchange assembly 400 to form the product gas to be cleaned. The mixing assembly 500 is provided with a fresh make-up water inlet 530. The product gas to be cleaned is introduced into the mixing assembly 500 through the second passage 720. The product gas to be cleaned and the fresh make-up water are mixed in the mixing assembly 500 to form a mixture. The mixture is introduced into the separation tank 300 through the first passage 710 between the mixing assembly 500 and the separation tank 300. The mixture is separated into clean product gas and intermediate make-up water in the separation tank 300. The intermediate make-up water flows into the heat exchange assembly 400 through the third passage 730 between the separation tank 300 and the heat exchange assembly 400. The intermediate make-up water is further heat exchanged with the product gas to be cleaned in the heat exchange assembly 400 to form hot make-up water. The hot make-up water is introduced into the electrolysis tank 110 through the separation device 160 for water electrolysis. Therefore, the heat of the product gas to be cleaned can be used to heat the make-up water, the temperature of the electrolysis water entering the electrolysis tank 110 is increased, the electrolysis efficiency of the water electrolysis is improved, and the energy-saving effect is achieved.
[0087] The heat exchange assembly 400 comprises a containing cavity 410 and a first mixing device 420 arranged in the containing cavity 410, and the first mixing device 420 is a static mixer. The first mixing device 420 is provided with a to-be-cleaned high-temperature product gas inlet 450 and a to-be-cleaned product gas outlet 460, the to-be-cleaned high-temperature product gas inlet 450 is communicated with the electrolytic cell 110 through the separation device 160 and is used for guiding the to-be-cleaned high-temperature product gas to flow in, and the to-be-cleaned product gas outlet 460 is communicated with the second passage 720. The to-be-cleaned high-temperature product gas flows through the first mixing device 420 and then flows into the mixing assembly 500 from the second passage 720, the intermediate supplementary water flows from the separation tank 300 through the third passage 730, and flows into the containing cavity 410 from the intermediate supplementary water inlet 430, and exchanges heat with the to-be-cleaned high-temperature product gas flowing through the first mixing device 420.
[0088] The to-be-cleaned high-temperature product gas is preliminarily cooled after flowing through the first mixing device 420 to form the to-be-cleaned product gas, and then flows into the mixing assembly 500 from the second passage 720. The intermediate supplementary water flows into the containing cavity 410 from the separation tank 300 through the third passage 730, exchanges heat with the to-be-cleaned high-temperature product gas flowing through the first mixing device 420 in the containing cavity 410, absorbs the heat of the to-be-cleaned high-temperature product gas to form the hot supplementary water, and then finally flows into the electrolytic cell 110 to participate in water electrolysis after flowing out of the containing cavity 410 through the hot supplementary water outlet 440. The above structure can realize heat exchange between the to-be-cleaned high-temperature product gas and the intermediate supplementary water in a relatively simple structure, and the to-be-cleaned high-temperature product gas and the intermediate supplementary water are not directly contacted, thereby improving the safety.
[0089] The first mixing device 420 comprises a first mixing pipeline 421 and a plurality of first mixing units 422 fixed in the first mixing pipeline 421, and the plurality of first mixing units 422 are sequentially arranged along the flow direction and cut and mix the fluid flowing through the first mixing pipeline 421. By sequentially arranging the plurality of first mixing units 422 along the flow direction, the heat exchange between the intermediate supplementary water and the to-be-cleaned high-temperature product gas can be more sufficient, the heat exchange effect is improved, and the water electrolysis efficiency and the energy saving effect are further improved.
[0090] The plurality of first mixing units 422 are sequentially and spacedly arranged along the vertical direction, which is consistent with the arrangement direction of the second mixing units 512 in the mixing assembly 500, so that the structure of the cleaning device 200 of the water electrolysis product gas is more compact, and the occupied volume is further reduced. In other embodiments, other specific structures of the first mixing device 420 considered appropriate by those skilled in the art can also be selected.
[0091] The mixing assembly 500 includes multiple second mixing devices 510, which are connected in series along the flow direction. Each second mixing device 510 is a static mixer. By connecting multiple second mixing devices 510 in series along the flow direction, the gas to be cleaned and the fresh replenishment water can be mixed multiple times within the multiple second mixing devices 510, resulting in more thorough mixing and improved washing and cooling effects on the gas to be cleaned.
[0092] The second mixing device 510 includes a second mixing pipe 511 and a plurality of second mixing units 512 fixed within the second mixing pipe 511. The plurality of second mixing units 512 are arranged sequentially along the flow direction to cut and mix the fluid flowing through the second mixing pipe 511. By arranging a plurality of second mixing units 512 sequentially along the flow direction, the mixing effect of the product gas to be cleaned and the fresh replenishment water can be further improved, making the product gas to be cleaned and the fresh replenishment water more thoroughly mixed, thereby further improving the washing and cooling effect of the product gas to be cleaned. In this embodiment, the mixing assembly 500 includes two second mixing devices 510, and each second mixing device 510 includes three second mixing units 512. In other embodiments, other specific numbers of second mixing devices 510 and second mixing units 512 that are deemed suitable by those skilled in the art can also be selected.
[0093] like Figure 2 As shown, multiple second mixing devices 510 are arranged at intervals in the horizontal direction and are connected sequentially by arc-shaped pipes. Within each second mixing device 510, multiple second mixing units 512 are arranged at intervals in the vertical direction and along the same straight line. By arranging the second mixing devices 510 at intervals in the horizontal direction, connecting them sequentially by arc-shaped pipes, and arranging multiple second mixing units 512 at intervals in the vertical direction and along the same straight line within each second mixing device 510, the overall structure of the mixing assembly 500 is made more compact, reducing the volume of the water electrolysis product gas cleaning device 200 and occupying less space. Simultaneously, the vertically spaced and straight-lined arrangement of the second mixing units 512 also facilitates the flow and mixing of the product gas to be cleaned and the fresh replenishment water.
[0094] The separation tank 300 is provided with a gas-liquid separator 310, and the outlet of the mixing assembly 500 is communicated with the gas-liquid separator 310. The gas-liquid separator 310 is used to separate the mixture into intermediate product gas and intermediate make-up water. The separation tank 300 is provided with a mixture inlet 330, and the mixture inlet 330 is communicated with the gas-liquid separator 310. The mixture flows into the gas-liquid separator 310 through the mixture inlet 330 from the mixing assembly 500 and is separated into clean product gas and intermediate make-up water through the gas-liquid separator 310. The clean product gas flows out from the clean product gas outlet 350 of the make-up water, and the intermediate make-up water flows out from the intermediate make-up water outlet 340 of the separator.
[0095] The water electrolysis product gas cleaning device 200 further comprises a pump 600, which is used to pump the intermediate make-up water into the heat exchange assembly 400. The separated make-up water is pumped into the heat exchange assembly 400 through the pump 600, so that sufficient flow power can be provided for the intermediate make-up water, and the water electrolysis product gas cleaning device 200 runs more smoothly.
[0096] The separation tank 300 is further provided with a wire mesh demister 320, which is used to remove liquid in the intermediate product gas. By arranging the wire mesh demister 320 in the separation tank 300, the intermediate product gas is de-liquidized in the wire mesh demister 320 to obtain clean product gas, so that the purity of the clean product gas product can be improved.
[0097] As shown in Figure 1 The water electrolysis system 100 further comprises a water supply device 120, a cooler 130, a cooling water tank 150, and a gas storage tank 140. The water supply device 120 is used to provide fresh make-up water for the mixing assembly 500. The cooler 130 is used to cool the exported clean product gas. The exported clean product gas is stored in the gas storage tank 140. The cooling water tank 150 provides cooling water for the cooler 130.
[0098] The water electrolysis system 100 further comprises a separation device 160, a heat exchange device 170, a filter 180, and an alkali tank 190. The electrolysis tank 110 electrolyzes the to-be-cleaned high-temperature product gas. The to-be-cleaned high-temperature product gas is first separated in the separation device 160, then introduced into the mixing assembly 500 to mix with fresh make-up water, and then the intermediate make-up water is separated in the separation tank 300. The intermediate make-up water forms hot make-up water with the to-be-cleaned high-temperature product gas in the heat exchange assembly 400. The hot make-up water flows back into the separation device 160, and then flows into the heat exchange device 170 and the filter 180 in sequence. The hot make-up water is mixed with alkali in the alkali tank 190 and reenters the electrolysis tank 110 to participate in water electrolysis.
[0099] Embodiment 2
[0100] The structure of this embodiment is basically the same as that of embodiment 1, and the same structure will not be described in detail. The difference between them is that:
[0101] As Figure 3 In the present embodiment, in each second mixing device 510, the plurality of second mixing units 512 are arranged in a horizontal direction and in a same straight line. In other embodiments, the internal structure of the mixing assembly 500 can also be arranged in other manners, and a person skilled in the art can select a suitable arrangement manner of the internal structure of the mixing assembly 500 according to actual conditions.
[0102] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship of the device or element in the normal use, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application in this respect.
[0103] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.
Claims
1. A water electrolysis product gas cleaning device comprising a knock-out drum, characterized in that, The water electrolysis product gas cleaning device further comprises: a mixing assembly for receiving a product gas to be cleaned and fresh make-up water, and for mixing the product gas to be cleaned with the fresh make-up water to form a mixture; a first passage connecting the mixing assembly and the separation tank, for guiding the mixture into the separation tank, and the separation tank is used for separating the mixture into a clean product gas.
2. The water electrolysis product gas cleaning device of claim 1, wherein, The water electrolysis product gas cleaning device is used in a water electrolysis system with an electrolytic cell, and the water electrolysis product gas cleaning device further comprises: a heat exchange assembly provided with an inlet for guiding a high-temperature product gas to be cleaned from the electrolytic cell, and the high-temperature product gas to be cleaned forms a preliminarily cooled product gas to be cleaned after flowing through the heat exchange assembly; a second passage connecting the heat exchange assembly and the mixing assembly, and the mixing assembly or the second passage is provided with an inlet for fresh make-up water; a third passage connecting the separation tank and the heat exchange assembly, the separation tank is used for separating the mixture into the clean product gas and intermediate make-up water, and the third passage is used for guiding the intermediate make-up water into the heat exchange assembly, and the heat exchange assembly can use the high-temperature product gas to be cleaned to heat exchange the intermediate make-up water to form hot make-up water; a fourth passage connecting the heat exchange assembly and the electrolytic cell, and the fourth passage is used for finally guiding the hot make-up water into the electrolytic cell.
3. The water electrolysis product gas scrubbing device of claim 2, wherein, The heat exchange assembly comprises a containing cavity and a first mixing device arranged in the containing cavity, and the high-temperature product gas to be cleaned forms the preliminarily cooled product gas to be cleaned after flowing through the first mixing device, and the intermediate make-up water flows into the containing cavity from the separation tank through the third passage and exchanges heat with the high-temperature product gas to be cleaned flowing through the first mixing device.
4. The water electrolysis product gas cleaning device of claim 3, wherein, The first mixing device comprises a first mixing pipeline and a plurality of first mixing units fixed in the first mixing pipeline, and the plurality of first mixing units are sequentially arranged along the flow direction to cut and mix the fluid flowing through the first mixing pipeline.
5. The water electrolysis product gas scrubbing device of claim 1, wherein, The mixing assembly comprises a plurality of second mixing devices, and the plurality of second mixing devices are sequentially arranged in series along the flow direction.
6. The water electrolysis product gas scrubbing device of claim 5, wherein, The second mixing device comprises a second mixing pipeline and a plurality of second mixing units fixed in the second mixing pipeline, and the plurality of second mixing units are sequentially arranged along the flow direction to cut and mix the fluid flowing through the second mixing pipeline.
7. The water electrolysis product gas scrubbing device of claim 6, wherein, The plurality of second mixing devices are arranged in the horizontal direction and are sequentially connected through the arc-shaped pipelines between the plurality of second mixing devices. In each second mixing device, the plurality of second mixing units are arranged in the vertical direction and along the same straight line.
8. The water electrolysis product gas scrubbing device of claim 6, wherein, The plurality of second mixing devices are arranged in the horizontal direction and are sequentially connected through the arc-shaped pipelines between the plurality of second mixing devices. In each second mixing device, the plurality of second mixing units are arranged in the horizontal direction and along the same straight line.
9. The water electrolysis product gas scrubbing device of claim 2, wherein, The separation tank is provided with a gas-liquid separator, an outlet of the mixing assembly is communicated with the gas-liquid separator, and the gas-liquid separator is used for separating the mixture into intermediate product gas and the intermediate supplementary water; And / or, the water electrolysis product gas cleaning device further comprises a pump, and the pump is used for pumping the intermediate supplementary water into the heat exchange assembly; And / or, the separation tank is further provided with a wire mesh demister, and the wire mesh demister is used for removing liquid in the intermediate product gas to obtain the clean product gas.
10. A water electrolysis system, characterized by The water electrolysis system comprises the water electrolysis product gas cleaning device according to any one of claims 1-9 and an electrolytic tank.