CN220224362U - Device for removing crude hydrogen alkali fog of electrolytic tank - Google Patents
Device for removing crude hydrogen alkali fog of electrolytic tank Download PDFInfo
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- CN220224362U CN220224362U CN202320961507.8U CN202320961507U CN220224362U CN 220224362 U CN220224362 U CN 220224362U CN 202320961507 U CN202320961507 U CN 202320961507U CN 220224362 U CN220224362 U CN 220224362U
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- fog
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- 239000003513 alkali Substances 0.000 title claims abstract description 125
- 239000001257 hydrogen Substances 0.000 title claims abstract description 99
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 99
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000003595 mist Substances 0.000 claims abstract description 49
- 238000000926 separation method Methods 0.000 claims abstract description 39
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 28
- 238000007865 diluting Methods 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims description 42
- 238000005868 electrolysis reaction Methods 0.000 claims description 10
- 238000003795 desorption Methods 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 64
- 239000007789 gas Substances 0.000 description 33
- 239000000945 filler Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 15
- 238000012546 transfer Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The utility model relates to a device for removing crude hydrogen alkali mist of an electrolytic cell, which comprises the electrolytic cell, a separation system and a pressure lifting system arranged between the electrolytic cell and the separation system, wherein the pressure lifting system is used for diluting the crude hydrogen containing alkali mist and increasing the pressure of the crude hydrogen to remove part of alkali mist, and a liquid outlet at the bottom end of the separation system is also respectively communicated with the electrolytic cell and the pressure lifting system. Compared with the prior art, the utility model firstly mixes the crude hydrogen containing alkali mist with water through the pressure lifting system, and increases the pressure thereof to remove part of the alkali mist, and then separates for the second time, so that the concentration of the alkali mist is reduced to 0.1-0.3%, and crystallization in downstream equipment is avoided.
Description
Technical Field
The utility model relates to the technical field of electrolytic hydrogen treatment, in particular to a device for removing crude hydrogen alkali fog of an electrolytic tank.
Background
With the increasing low-carbon emission reduction demands, green hydrogen preparation technology is widely paid attention to, and water electrolysis hydrogen production by using renewable energy sources is the process with the lowest carbon emission in numerous hydrogen source schemes at present. The popularization and application of hydrogen in the fields of energy storage, chemical industry, metallurgy, distributed generation and the like become one of effective ways for controlling greenhouse gas emission and slowing down global temperature rise. The original purpose of green utilization of hydrogen energy is maintained, the green hydrogen preparation technology represented by the hydrogen production by the electrolysis of water through a proton exchange membrane is actively developed, and the fusion development with renewable energy sources is realized.
Currently, in the market progress, alkaline Water Electrolysis (AWE) is dominant as the most mature electrolysis technology, especially for some large-scale projects. AWE uses aqueous potassium hydroxide (KOH) as an electrolyte to separate water to produce hydrogen and oxygen.
In general, low-voltage AWE electrolytic tanks developed based on chlor-alkali industry have the characteristics of high operation safety coefficient, high current density and high efficiency, and are especially favored by foreign users. But the operating pressure of low pressure AWE cells is typically maintained in the range of 20 to 30 kPag. It must pass through a compression section before entering a downstream section. Because of the low operating pressure, alkali mist is easy to be entrained in the gas-liquid separation process and enters the compressor. The alkali mist was 30% KOH droplets.
The flow has the following defects:
(1) Because the operating pressure of the electrolytic cell is low, if conventional demister devices and methods are used, such as efficient demisters for washing towers, fiber demisters, plate demisters, and the like. The greater pressure drop results in a lower initial stage compressor inlet pressure, increasing downstream compressor energy consumption. If dead zones occur in the local areas, the alkali liquor also becomes crystallized and plugs the demister.
(2) Because the operating pressure of the electrolytic cell is lower, the operating pressure is usually 20-30 kPag, alkali mist is removed before compression, and the size of the gas-liquid separator is larger than that of the gas-liquid separator after compression, so that the investment and the occupied area of the gas-liquid separator are increased.
(3) Since only a certain amount of alkali mist can be removed if the conventional demisting apparatus and method are used. If a water washing process is adopted, the liquid-gas ratio is too small to achieve the washing removal. If the washing amount is increased or the height of the filling layer for washing is increased, the gas resistance is also increased, and the power consumption of the subsequent compressor is increased.
(4) In the subsequent compression process of the residual alkali mist, 30% KOH in the alkali mist can be crystallized and separated out in the interior of the compressor and is locally accumulated due to the evaporation of moisture. The damage condition of the compressor is easy to occur after long-time operation.
(5) When the device is stopped, nitrogen purging is needed, and the partial pressure of water is reduced, so that the residual alkali liquor in the pipeline is easy to crystallize.
The key point of solving the defects of the flow is to remove the alkali fog of crude hydrogen as much as possible and avoid alkali liquor crystallization in the subsequent compressor. While keeping the power consumption of the subsequent compressor as low as possible.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a device for removing the crude hydrogen alkali fog of the electrolytic tank.
The method is a flow for directly removing the crude hydrogen alkali fog of the electrolytic tank in the pressure lifting process, solves the problem that KOH crystallization damages a compressor after heating water vapor is evaporated in the subsequent conventional compression process in the current crude hydrogen product containing the alkali fog, and can solve the problem of pipeline valve blockage caused by KOH crystallization.
The aim of the utility model can be achieved by the following technical scheme:
the utility model provides a device for removing alkali mist of crude hydrogen of an electrolytic cell, which comprises the electrolytic cell and a separation system connected with an outlet at one end of the electrolytic cell, and further comprises a pressure lifting system arranged between the electrolytic cell and the separation system, wherein the pressure lifting system is used for diluting the crude hydrogen of the alkali mist from the electrolytic cell and increasing the pressure of the crude hydrogen of the alkali mist so as to remove part of the alkali mist, and a liquid outlet at the bottom end of the separation system is also respectively connected with the electrolytic cell and the pressure lifting system.
Further, the pressure lifting system is selected from any one of a jet screw compressor, a water ring compressor, a venturi jet pump, or a dynamic wave scrubber.
Further, when the pressure lifting system is a jet screw compressor, a water ring compressor or a venturi jet pump, the separation system is a gas-liquid separator.
Furthermore, when the pressure lifting system is a Venturi jet pump, a high-pressure circulating washing water pump is further arranged at the liquid outlet at the bottom of the gas-liquid separator.
Further, when the pressure lifting system is a dynamic wave scrubber, the separation system is a dynamic wave scrubber, and a high-pressure circulating scrubbing water pump is further arranged at a liquid outlet at the bottom of the dynamic wave scrubber.
Further, the gas-liquid separator is internally provided with a filler or a sprayer, and the filler in the gas-liquid separator is any filler in any form and material, such as structured filler and random packing;
the sprayer in the gas-liquid separator adopts any form of spray head, and the spray head only needs to cover the gas-liquid separator uniformly.
Further, the dynamic wave washing tower is internally provided with a filler, and the filler is of any form and material, such as regular filler and random filler.
Still further, demisters are provided in the gas-liquid separator and the dynamic wave scrubber, and the demister type may be any type, such as a wire mesh demister, a baffle demister, a fiber demister, a swirl tube demister, or other high-efficiency demisters.
Based on the device of one of the technical schemes, the method for removing the crude hydrogen alkali fog of the electrolytic tank comprises the following steps: introducing the alkali-containing fog crude hydrogen in the electrolytic tank into a pressure lifting system, separating the alkali-containing fog crude hydrogen through the pressure lifting system for the first time, separating the alkali-containing fog crude hydrogen through a separating system for the second time, enabling the separated crude hydrogen to flow out from a top air outlet of the separating system, and enabling the separated dilute alkaline water to flow out to the electrolytic tank and the pressure lifting system for recycling through a bottom liquid outlet of the separating system.
Further, when the pressure lifting system is an injection screw compressor, the separation system is a gas-liquid separator, the crude hydrogen containing alkali mist enters the injection screw compressor for primary separation, then enters the gas-liquid separator for secondary separation to obtain the crude hydrogen and dilute alkaline water with the KOH concentration of 0.1-0.3%,
the primary separation process comprises the following steps: mixing the alkali-containing fog crude hydrogen with circulating washing water in a jet screw compressor, and raising the pressure of the alkali-containing fog crude hydrogen to 2-30 bar;
the secondary separation process comprises the following steps: separating the crude hydrogen containing alkali mist mixed with water by a gas-liquid separator to obtain the entrainment quantity of 100-1000 mg/Nm 3 The gas phase and pure water entering from the upper part of the filler in the gas-liquid separator are subjected to gas-liquid mass transfer on the surface of the filler, so that the alkali fog concentration in the gas phase is further diluted, the alkali fog concentration is filtered by a demister of the gas-liquid separator, finally, the alkali fog concentration flows out from a top gas outlet of the gas-liquid separator, and waste liquid flows out from a bottom liquid outlet of the gas-liquid separator, so that purified crude hydrogen and dilute alkali water with KOH concentration of 0.1-0.3% are respectively obtained.
Further, when the pressure lifting system is a water-ring compressor, the separation system is a gas-liquid separator, the alkali-mist-containing crude hydrogen enters the water-ring compressor for primary separation, then enters the gas-liquid separator for secondary separation to obtain crude hydrogen and dilute alkali water with the KOH concentration of 0.1-0.3%,
the primary separation process comprises the following steps: mixing the alkali-containing fog crude hydrogen with circulating washing water in a water ring type compressor, and raising the pressure of the alkali-containing fog crude hydrogen to 2-30 bar;
the secondary separation process comprises the following steps: separating the crude hydrogen containing alkali mist mixed with water by a gas-liquid separator to obtain the entrainment quantity of 100-1000 mg/Nm 3 The gas phase and the pure water entering from the upper part of the filler in the gas-liquid separator carry out gas-liquid mass transfer on the surface of the filler, thereby further dilutingThe alkali fog concentration in the outgas phase is filtered by a demister of the gas-liquid separator, and finally flows out from a top gas outlet of the gas-liquid separator, and the waste liquid flows out from a bottom liquid outlet of the gas-liquid separator, so that purified crude hydrogen and dilute alkali water with KOH concentration of 0.1% -0.3% are respectively obtained.
Further, when the pressure lifting system is a Venturi jet pump, the separation system is a gas-liquid separator, the crude hydrogen containing alkali mist enters the Venturi jet pump for primary separation, then enters the gas-liquid separator for secondary separation to obtain the crude hydrogen and the dilute alkaline water with the KOH concentration of 0.1-0.3%,
the primary separation process comprises the following steps: mixing the alkali-containing mist crude hydrogen with circulating spraying water in a venturi jet pump, and lifting the pressure of the alkali-containing mist crude hydrogen to 1-100 kPa;
the secondary separation process comprises the following steps: separating the crude hydrogen containing alkali mist mixed with water by a gas-liquid separator to obtain the entrainment quantity of 100-1000 mg/Nm 3 The gas phase and pure water entering from the upper part of the filler in the gas-liquid separator carry out gas-liquid mass transfer on the surface of the filler, so that the alkali fog concentration in the gas phase is further diluted, the alkali fog is filtered by a demister of the gas-liquid separator, finally, the alkali fog flows out from a top air outlet of the gas-liquid separator, waste liquid flows out from a bottom liquid outlet of the gas-liquid separator, purified crude hydrogen and dilute alkali water with KOH concentration of 0.1-0.3% are respectively obtained, and the dilute alkali water flows into an electrolytic tank and a Venturi jet pump after flowing through a high-pressure circulating washing water pump.
Further, when the pressure lifting system is a dynamic wave scrubber, the separation system is a dynamic wave scrubber, the crude hydrogen containing alkali mist enters the dynamic wave scrubber for primary separation, then enters the dynamic wave scrubber for secondary separation, crude hydrogen and dilute alkaline water containing KOH with concentration of 0.1-0.3% are obtained,
the primary separation process comprises the following steps: the crude hydrogen gas containing alkali mist reversely passes through a foam layer in the dynamic wave scrubber, and the pressure drop of the crude hydrogen gas containing alkali mist is stably maintained to be less than 1-2 kPa;
the secondary separation process comprises the following steps: separating the crude hydrogen gas containing alkali mist passing through the foam layer by a dynamic wave washing tower to obtain entrainmentThe amount is 100-1000 mg/Nm 3 The gas phase and pure water entering from the upper part of the filler in the dynamic wave washing tower carry out gas-liquid mass transfer on the surface of the filler, so that the alkali fog concentration in the gas phase is further diluted, the alkali fog is filtered by a demister of the dynamic wave washing tower, finally, the alkali fog flows out from an air outlet at the top of the dynamic wave washing tower, waste liquid flows out from a liquid outlet at the bottom of the dynamic wave washing tower, purified crude hydrogen and dilute alkali water with KOH concentration of 0.1-0.3% are respectively obtained, and the dilute alkali water flows into an electrolytic tank and the dynamic wave washing device after flowing through a high-pressure circulating washing water pump.
Compared with the prior art, the utility model has the following beneficial effects:
(1) In the process of removing the crude hydrogen alkali mist of the electrolytic tank, the utility model cancels the flow design that the crude hydrogen containing alkali mist directly enters a gas-liquid separator or a water scrubber from the electrolytic tank, but increases the primary separation of a pressure lifting system to remove part of the alkali mist in the crude hydrogen (namely, the crude hydrogen containing alkali mist is mixed with water and the pressure thereof is increased, so that the alkali mist in the crude hydrogen is absorbed and diluted by water), and then carries out secondary separation by the gas-liquid separator or the water scrubber, so that the concentration of KOH in the alkali mist is reduced to 0.1-0.3%, the high-concentration alkali mist is prevented from being brought into a downstream device and the crystallization condition is generated in downstream equipment or a pipeline, and the operation safety of the equipment is ensured.
(2) The pressure lifting system can be used for various pressure lifting devices, and is simple to operate and high in efficiency.
Drawings
FIG. 1 is a schematic diagram of the structure of an apparatus for removing crude hydrogen alkali mist from an electrolytic cell comprising a jet screw compressor.
FIG. 2 is a schematic structural view of an apparatus for removing crude hydrogen alkali mist from an electrolytic tank, which comprises a water ring type compressor.
FIG. 3 is a schematic structural diagram of an apparatus for removing crude hydrogen alkali mist from an electrolytic cell comprising a venturi jet pump.
FIG. 4 is a schematic structural diagram of an apparatus for removing crude hydrogen alkali mist from an electrolytic cell comprising a dynamic wave scrubber.
The figures are identified as follows:
the device comprises an electrolytic tank 1, a jet screw compressor 2, a water ring compressor 3, a venturi jet pump 4, a dynamic wave scrubber 5, a gas-liquid separator 6, a dynamic wave scrubber 7, a high-pressure circulating washing water pump 8 and a valve 9.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
In the following embodiments, unless otherwise specified, functional components or structures are indicated as conventional components or structures adopted in the art to achieve the corresponding functions.
Example 1:
as shown in figure 1, the device for removing the crude hydrogen alkali fog of the electrolytic tank comprises an electrolytic tank 1, an injection screw compressor 2 and a gas-liquid separator 6 which are sequentially connected through pipelines, wherein a liquid outlet at the bottom of the gas-liquid separator 6 is also communicated with the electrolytic tank 1 and the injection screw compressor 2, and a valve 9 is further arranged on a pipeline in front of the electrolytic tank 1 and the water ring compressor 3.
The method for removing the crude hydrogen alkali fog of the electrolytic tank by using the device comprises the following steps: the alkali-containing fog crude hydrogen generated by the electrolytic tank 1 enters the water spraying screw compressor 2, the circulating washing water and the alkali-containing fog crude hydrogen enter the water spraying screw compressor 2 together, the alkali-containing fog crude hydrogen and the circulating washing water are fully mixed in a gap of the water spraying screw compressor 2, then the pressure is increased to 2-30 bar, as the alkali fog is redissolved in the added circulating washing water, the alkali solution concentration is further diluted, and then the alkali-containing fog crude hydrogen which is pressurized and mixed with water enters the high-efficiency gas-liquid separator 6 again for gas-liquid separation. The gas phase entrainment quantity from the high-efficiency gas-liquid separator 6 is 100-1000 mg/Nm 3 The gas phase enters from the bottom of the filler, carries out gas-liquid mass transfer with pure water entering from the upper part of the filler on the surface of the filler, further dilutes the alkali fog concentration carried by the gas phase and reduces entrainment, finally purified gas phase flows out from the gas outlet at the top of the high-efficiency gas-liquid separator 6, and waste liquid flows out from the liquid outlet at the bottom of the high-efficiency gas-liquid separator 6, so that purified crude hydrogen and dilute alkali water with KOH concentration of 0.1-0.3% are respectively obtained.
By this removal ofThe process of removing the crude hydrogen alkali fog of the electrolytic tank is finally 100-1000 mg/Nm 3 KOH is diluted to 0.1-0.3% from the original 30% under the gas phase entrainment quantity, so that the requirement of a downstream compressor on particles is met, and the bearable range of the downstream compressor or a reciprocating compressor on crystals is reached.
Example 2:
as shown in figure 2, the device for removing the crude hydrogen alkali fog of the electrolytic tank comprises an electrolytic tank 1, a water ring type compressor 3 and a gas-liquid separator 6 which are connected through pipelines in sequence, wherein a liquid outlet at the bottom of the gas-liquid separator 6 is also communicated with the electrolytic tank 1 and the water ring type compressor 3, and a valve 9 is further arranged on the pipeline in front of the electrolytic tank 1 and the water ring type compressor 3.
The method for removing the crude hydrogen alkali fog of the electrolytic tank by using the device comprises the following steps: the alkali-containing fog crude hydrogen generated by the electrolytic tank 1 enters the water ring type compressor 3, the circulating washing water and the alkali-containing fog crude hydrogen enter the water ring type compressor 3 together, the alkali-containing fog crude hydrogen and the circulating washing water are fully mixed in a gap of the water ring type compressor 3, then the pressure is increased to 2-30 bar, as the alkali fog is redissolved in the added circulating washing water, the alkali concentration is further diluted, and then the alkali-containing fog crude hydrogen which is pressurized and mixed with water enters the high-efficiency gas-liquid separator 6 again for gas-liquid separation. The gas phase entrainment quantity from the high-efficiency gas-liquid separator 6 is 100-1000 mg/Nm 3 The gas phase enters from the bottom of the filler, carries out gas-liquid mass transfer with pure water entering from the upper part of the filler on the surface of the filler, further dilutes the alkali fog concentration carried by the gas phase and reduces entrainment, finally purified gas phase flows out from the gas outlet at the top of the high-efficiency gas-liquid separator 6, and waste liquid flows out from the liquid outlet at the bottom of the high-efficiency gas-liquid separator 6, so that purified crude hydrogen and dilute alkali water with KOH concentration of 0.1-0.3% are respectively obtained.
Through the process of removing the crude hydrogen alkali fog of the electrolytic tank, the final concentration is 100-1000 mg/Nm 3 KOH is diluted to 0.1-0.3% from the original 30% under the gas phase entrainment quantity, so that the requirement of a downstream compressor on particles is met, and the bearable range of the downstream compressor or a reciprocating compressor on crystals is reached.
Example 3:
as shown in figure 3, the device for removing the crude hydrogen alkali fog of the electrolytic tank comprises an electrolytic tank 1, a venturi jet pump 4 and a gas-liquid separator 6 which are connected through pipelines in sequence, wherein a high-pressure circulating washing water pump 8 is further connected to a liquid outlet at the bottom of the gas-liquid separator 6, and the electrolytic tank 1 and the venturi jet pump 4 are communicated.
The method for removing the crude hydrogen alkali fog of the electrolytic tank by using the device comprises the following steps: the alkali-containing fog crude hydrogen generated by the electrolytic tank 1 enters the venturi jet pump 4, the circulating washing water from the high-pressure circulating washing water pump 8 and the alkali-containing fog crude hydrogen enter the venturi jet pump 4 together, so that the pressure of the alkali-containing fog crude hydrogen is raised to 1-100 kPa, the alkali-containing crude hydrogen and the circulating washing water are fully mixed in the venturi jet pump 4, as the alkali fog is redissolved in the added circulating washing water, the alkali concentration is further diluted, and then the pressurized alkali-containing fog crude hydrogen mixed with water enters the high-efficiency gas-liquid separator 6 again for gas-liquid separation. The gas phase entrainment quantity from the high-efficiency gas-liquid separator 6 is 100-1000 mg/Nm 3 The gas phase enters from the bottom of the filler, carries out gas-liquid mass transfer with pure water entering from the upper part of the filler on the surface of the filler, further dilutes the alkali fog concentration entrained by the gas phase and reduces entrainment, finally purified gas phase flows out from the gas outlet of the high-efficiency gas-liquid separator 6, waste liquid flows out from the liquid outlet at the bottom of the high-efficiency gas-liquid separator 6, purified crude hydrogen and dilute alkaline water with KOH concentration of 0.1-0.3% are respectively obtained, and the dilute alkaline water flows to the electrolytic tank 1 and the Venturi jet pump 4 respectively after flowing through the high-pressure circulating washing water pump 8.
Through the process of removing the crude hydrogen alkali fog of the electrolytic tank, the final concentration is 100-1000 mg/Nm 3 KOH is diluted to 0.1-0.3% from the original 30% under the gas phase entrainment quantity, so that the requirement of a downstream compressor on particles is met, and the bearable range of the downstream compressor or a reciprocating compressor on crystals is reached.
Example 4:
as shown in fig. 4, the device for removing the crude hydrogen alkali fog of the electrolytic tank comprises an electrolytic tank 1, a dynamic wave scrubber 5 and a dynamic wave scrubber 7 which are connected through pipelines in sequence, wherein a high-pressure circulating washing water pump 8 is also connected to a liquid outlet at the bottom of the dynamic wave scrubber 10, and the electrolytic tank 1 and the dynamic wave scrubber 5 are connected.
The method for removing the crude hydrogen alkali fog of the electrolytic tank by using the device comprises the following steps: the crude hydrogen containing alkali mist generated by the electrolytic tank 1 enters the dynamic wave washer 5, the crude hydrogen containing alkali mist reversely passes through a foam layer of the dynamic wave washer 5 (the foam layer is provided by a high-pressure circulating washing water pump 8 and a spray head), the pressure drop of the crude hydrogen containing alkali mist is stably maintained to be smaller than 1 to 2kPa, the crude hydrogen containing alkali mist and circulating washing water are fully mixed in the dynamic wave washing pipe 5, the concentration of alkali solution is further diluted because the alkali mist is redissolved in the circulating washing water, the crude hydrogen containing alkali mist passing through the foam layer is separated by the dynamic wave washing tower 7, and the entrainment quantity is 100 to 1000mg/Nm 3 The gas phase enters from the bottom of the filler, and carries out gas-liquid mass transfer with pure water entering from the upper part of the filler on the surface of the filler, so as to further dilute the alkali fog concentration in the gas phase, finally, the purified gas phase flows out from an air outlet at the top of the dynamic wave washing tower 7, the waste liquid flows out from an air outlet at the bottom of the dynamic wave washing tower 7, purified crude hydrogen and dilute alkaline water with KOH concentration of 0.1-0.3% are respectively obtained, and the dilute alkaline water also flows into the electrolytic tank 1 and the dynamic wave washing device 5 after flowing through the high-pressure circulating washing water pump 8.
Through the process of removing the crude hydrogen alkali fog of the electrolytic tank, the final concentration is 100-1000 mg/Nm 3 KOH is diluted to 0.1-0.3% from the original 30% under the gas phase entrainment quantity, so that the requirement of a downstream compressor on particles is met, and the bearable range of the downstream compressor or a reciprocating compressor on crystals is reached.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.
Claims (5)
1. The utility model provides a device of crude hydrogen alkali fog of desorption electrolysis trough, includes electrolysis trough (1) and switch-on electrolysis trough (1) one end export's piece of separation system, its characterized in that, the device is still including locating electrolysis trough (1) with pressure lift system between the piece of separation system, pressure lift system is used for diluting and comes from contain the crude hydrogen of alkali fog of electrolysis trough (1) and improves contain the crude hydrogen pressure of alkali fog in order to detach some alkali fog, the bottom liquid outlet of piece of separation system still is switch-on respectively electrolysis trough (1) and pressure lift system.
2. The device for removing crude hydrogen alkali mist of an electrolytic tank according to claim 1, characterized in that the pressure lifting system is selected from any one of a jet screw compressor (2), a water ring compressor (3), a venturi jet pump (4), or a dynamic wave scrubber (5).
3. A device for removing alkaline mist of crude hydrogen from an electrolytic tank according to claim 2, characterized in that when the pressure lifting system is a jet screw compressor (2), a water ring compressor (3) or a venturi jet pump (4), the separation system is a gas-liquid separator (6).
4. A device for removing crude hydrogen alkali mist of an electrolytic tank according to claim 3, characterized in that when the pressure lifting system is a venturi jet pump (4), a high-pressure circulating washing water pump (8) is further arranged at the bottom liquid outlet of the gas-liquid separator (6).
5. The device for removing the crude hydrogen alkali mist of the electrolytic tank according to claim 2, wherein when the pressure lifting system is a dynamic wave scrubber (5), the separation system is a dynamic wave scrubber (7), and a high-pressure circulating washing water pump (8) is further arranged at a bottom liquid outlet of the dynamic wave scrubber (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320961507.8U CN220224362U (en) | 2023-04-25 | 2023-04-25 | Device for removing crude hydrogen alkali fog of electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320961507.8U CN220224362U (en) | 2023-04-25 | 2023-04-25 | Device for removing crude hydrogen alkali fog of electrolytic tank |
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| Publication Number | Publication Date |
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| CN220224362U true CN220224362U (en) | 2023-12-22 |
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| CN202320961507.8U Active CN220224362U (en) | 2023-04-25 | 2023-04-25 | Device for removing crude hydrogen alkali fog of electrolytic tank |
Country Status (1)
| Country | Link |
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| CN (1) | CN220224362U (en) |
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2023
- 2023-04-25 CN CN202320961507.8U patent/CN220224362U/en active Active
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