CN213596423U - Water electrolysis hydrogen production system - Google Patents
Water electrolysis hydrogen production system Download PDFInfo
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- CN213596423U CN213596423U CN202022620017.0U CN202022620017U CN213596423U CN 213596423 U CN213596423 U CN 213596423U CN 202022620017 U CN202022620017 U CN 202022620017U CN 213596423 U CN213596423 U CN 213596423U
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 89
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 142
- 230000003197 catalytic effect Effects 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 238000005406 washing Methods 0.000 claims abstract description 29
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims description 179
- 239000007789 gas Substances 0.000 claims description 55
- 239000002274 desiccant Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 230000001502 supplementing effect Effects 0.000 claims description 15
- 239000003792 electrolyte Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 description 10
- 238000011069 regeneration method Methods 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000007809 chemical reaction catalyst Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229940021013 electrolyte solution Drugs 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
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- 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
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a hydrogen production system by electrolyzing water. The water electrolysis hydrogen production system comprises: the electrolytic water mechanism, catalytic oxidation mechanism, at least one first dry mechanism, cooling separation washing mechanism and at least one second dry mechanism that connect gradually, and, first dry mechanism still with electrolytic water mechanism connects, second dry mechanism still with first dry mechanism heat conduction is connected. The embodiment of the utility model provides a pair of electrolytic water hydrogen manufacturing system, simple structure, convenient to use, it can carry out recycle to the heat that carries out the follow-up processing in-process at hydrogen, and then has practiced thrift the energy consumption in hydrogen preparation, the collection, and then has reduced manufacturing cost.
Description
Technical Field
The utility model relates to a hydrogen production system, in particular to water electrolysis hydrogen production system, which belongs to the technical field of hydrogen production equipment.
Background
The water electrolysis is an important hydrogen production method, can be applied to the fields of metal smelting, coal chemical industry, petroleum refining, wind-solar power generation and energy storage, fuel cells and the like, does not generate greenhouse gases in the hydrogen production process, is considered as an important hydrogen production method, and hydrogen produced by water electrolysis is generally mixed with a small amount of oxygen, water vapor and electrolyte and needs to be removed through steps of separation, washing and the like to obtain high-purity hydrogen; however, the existing deoxygenation drying method mainly adopts temperature swing adsorption, uses a solid adsorbent to adsorb oxygen and moisture, and regenerates the adsorbent by a heating method, and the process usually uses electric heating for energy supply, so that the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an electrolytic water hydrogen production system to overcome the defects in the prior art.
For realizing the purpose of the utility model, the utility model discloses a technical scheme include:
the embodiment of the utility model provides an electrolytic water hydrogen production system, including electrolytic water mechanism, catalytic oxidation mechanism, at least one first dry mechanism, cooling separation washing mechanism and at least one second dry mechanism that connect gradually, and, the first dry mechanism still with the electrolytic water mechanism is connected, the second dry mechanism still with first dry mechanism heat conduction is connected; wherein,
the water electrolysis mechanism is at least used for preparing and obtaining hydrogen, and the hydrogen is contained in the mixed gas led out from the water electrolysis mechanism;
the catalytic oxidation mechanism is at least used for enabling hydrogen and oxygen in the mixed gas to generate catalytic reaction and enabling the temperature of the mixed gas to rise above a specified temperature;
the first drying mechanism is at least used for exchanging heat with the mixed gas and condensing part of gas in the mixed gas to form a liquid-phase medium, and the liquid-phase medium flows back to the water electrolysis hydrogen production mechanism;
the cooling separation washing mechanism is at least used for removing low-boiling-point impurities in the mixed gas;
the second drying mechanism is at least used for removing moisture in the mixed gas so as to obtain high-purity hydrogen.
Compared with the prior art, the hydrogen production system by water electrolysis provided by the embodiment of the utility model has simple structure and convenient use, and can recycle the heat in the subsequent treatment process of hydrogen, thereby saving the energy consumption in the preparation and collection of hydrogen and further reducing the production cost;
the embodiment of the utility model provides a pair of electrolytic water hydrogen manufacturing system utilizes the catalytic oxidation combustor to desorption the trace oxygen in the hydrogen, emits the heat simultaneously to retrieve this heat and the partial sensible heat of gas, and utilize the heat of retrieving to heat the drier and regenerate, reduced the energy consumption of drier at regeneration process.
Drawings
Fig. 1 is a schematic structural diagram of a system for producing hydrogen by electrolyzing water according to an exemplary embodiment of the present invention.
Detailed Description
In view of the deficiencies in the prior art, the inventor of the present invention has made extensive studies and practices to provide the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The embodiment of the utility model provides an electrolytic water hydrogen production system, including electrolytic water mechanism, catalytic oxidation mechanism, at least one first dry mechanism, cooling separation washing mechanism and at least one second dry mechanism that connect gradually, and, the first dry mechanism still with the electrolytic water mechanism is connected, the second dry mechanism still with first dry mechanism heat conduction is connected; wherein,
the water electrolysis mechanism is at least used for preparing and obtaining hydrogen, and the hydrogen is contained in the mixed gas led out from the water electrolysis mechanism;
the catalytic oxidation mechanism is at least used for enabling hydrogen and oxygen in the mixed gas to generate catalytic reaction and enabling the temperature of the mixed gas to rise above a specified temperature;
the first drying mechanism is at least used for exchanging heat with the mixed gas and condensing part of gas in the mixed gas to form a liquid-phase medium, and the liquid-phase medium flows back to the water electrolysis hydrogen production mechanism;
the cooling separation washing mechanism is at least used for removing low-boiling-point impurities in the mixed gas;
the second drying mechanism is at least used for removing moisture in the mixed gas so as to obtain high-purity hydrogen.
Further, the first drying mechanism comprises a first drying tower, and the first drying tower is provided with an air inlet connected with the catalytic oxidation mechanism, an air outlet connected with the cooling, separating and washing mechanism and a liquid reflux outlet connected with the water electrolysis mechanism.
Further, the second drying mechanism comprises a second drying tower, one end of the second drying tower is provided with an air inlet connected with the cooling, separating and washing mechanism, and the other end of the second drying tower is provided with an air outlet, wherein the second drying tower is arranged outside the first drying tower, and the tower wall of the second drying tower is in heat conduction connection with the tower wall of the first drying tower, or the second drying tower is overlapped with part of the tower wall of the first drying tower.
Further, the second drying mechanism comprises a second drying tower, one end of the second drying tower is provided with an air inlet connected with the cooling, separating and washing mechanism, and the other end of the second drying tower is provided with an air outlet, wherein the second drying tower is arranged inside the first drying tower.
In some specific embodiments, the first drying tower and the second drying tower are integrally arranged, and the first drying tower and the second drying tower are separated by a metal with good thermal conductivity.
Further, at least the tower wall of the second drying tower is a metal layer with good heat conductivity.
Furthermore, a heat insulation layer is arranged outside the first drying tower and/or the second drying tower, or the first drying tower and the second drying tower are arranged in a heat insulation structure.
Furthermore, the second drying tower is also connected with a vacuum pump, and the vacuum pump is at least used for forming a negative pressure environment in the second drying tower.
Furthermore, the second drying tower is further connected to a heat supplementing mechanism, the heat supplementing mechanism is at least used for heating the second drying tower so as to enable the temperature in the second drying tower to reach a specified temperature capable of regenerating the drying agent in the second drying tower, and the heat supplementing mechanism can be a heater or the like.
In some specific embodiments, the system for producing hydrogen by electrolyzing water comprises a plurality of first drying mechanisms and a plurality of second drying mechanisms, wherein the plurality of first drying mechanisms are arranged independently of each other and are respectively connected with the catalytic oxidation mechanism, the water electrolysis mechanism and the cooling, separating and washing mechanism, and the plurality of second drying mechanisms are arranged independently of each other and are respectively connected with the cooling, separating and washing mechanism.
Furthermore, the water electrolysis hydrogen production system also comprises a hydrogen collecting and storing mechanism, and the hydrogen collecting and storing mechanism is connected with the second drying mechanism.
Further, the water electrolysis mechanism comprises an electrolytic cell, a pure water supplementing mechanism and an electrolyte recycling and supplementing mechanism.
Further, the catalytic oxidation mechanism includes a catalytic burner.
Further, the cooling, separating and washing mechanism comprises a cooler, a separator and a washer.
The technical solution, the implementation process and the principle thereof will be further explained with reference to the drawings.
Referring to fig. 1, a water electrolysis hydrogen production system includes a water electrolysis mechanism 10, a catalytic combustor 20, at least one first drying tower 30, a cooling separation washing mechanism, and at least one second drying tower 40, wherein the water electrolysis mechanism 10, the catalytic combustor 20, the at least one first drying tower 30, the cooling separation washing mechanism, and the at least one second drying tower 40 are sequentially connected by a connecting pipeline, the first drying tower 30 is further connected with the water electrolysis mechanism 10, and the second drying tower 40 is further connected with the first drying tower 30 in a heat conduction manner.
Specifically, one end of the first drying tower 30 has an air inlet 31 connected to the catalytic oxidation mechanism 10, the other end has an air outlet 32 connected to the cooling separation washing mechanism and a liquid reflux outlet 33 connected to the electrolyzed water mechanism 10, one end of the second drying tower 40 is provided with an air inlet 41 connected to the cooling separation washing mechanism, a vacuum pumping air outlet 43 connected to a vacuum pump, and the other end is provided with an air outlet 42, wherein the second drying tower 40 is connected to the first drying tower 30 in a heat conducting manner, so that the heat in the mixed gas output from the catalytic combustor 20 is transferred to the second drying tower 40, and the heat in the mixed gas output from the catalytic combustor 20 is utilized to heat the second drying tower 40, so that the temperature in the second drying tower 40 reaches a specified temperature at which the drying agent therein can be regenerated.
Specifically, referring to fig. 1 again, the second drying tower 40 is disposed inside the first drying tower 30, the tower wall of the first drying tower 30 is a metal layer with good thermal conductivity, and an insulating layer is disposed outside the first drying tower 30; of course, the second drying tower 40 may also be disposed outside the first drying tower 30 and disposed side by side with the first drying tower 30, the second drying tower 40 and the first drying tower 30 may have a shared tower wall, the shared tower wall is a metal layer with good thermal conductivity, and the first drying tower 30 and the second drying tower 40 are both provided with heat insulating layers, and the material and the thickness of the heat insulating layers may adopt materials and parameters known to those skilled in the art, which are mainly used to realize heat insulation of the first drying tower 30 and the second drying tower 40.
Specifically, the first drying tower 30 is at least used for exchanging heat with the mixed gas output by the catalytic combustor 20, and condensing part of the gas in the mixed gas to form a liquid-phase medium, and the liquid-phase medium flows back to the water electrolysis hydrogen production mechanism; the cooling separation washing mechanism is at least used for removing low-boiling-point impurities in the mixed gas; the second drying tower 40 is at least used for removing moisture in the mixed gas, so that high-purity hydrogen is obtained.
Specifically, it can be understood that the first drying tower 30 and the second drying tower 40 may also be integrally disposed, the first drying tower 30 and the second drying tower 40 may be two portions of the same drying tower, the two portions are separated by a metal layer with good thermal conductivity, the two portions are relatively independent, the two portions may be disposed side by side, or may be disposed in a sleeve manner, fig. 1 shows that the first drying tower 30 and the second drying tower 40 are respectively an outer layer structure and an inner layer structure of a jacketed drying tower, and the structures of the first drying tower and the second drying tower are mainly for implementing sufficient heat exchange between the second drying tower and the mixed gas entering the first drying tower.
Specifically, the water electrolysis hydrogen production system further comprises a vacuum pump, the vacuum pump is connected with the vacuumizing air outlet 43 of the second drying tower 40, and the vacuum pump is at least used for forming a negative pressure environment required by desiccant regeneration in the second drying tower 40, wherein the vacuum pump can tolerate gas with higher humidity.
Specifically, the system for producing hydrogen by electrolyzing water further comprises a heat supplementing mechanism, the heat supplementing mechanism is connected with the second drying tower 40, the heat supplementing mechanism is at least used for heating the second drying tower 40 so that the temperature in the second drying tower 40 reaches a specified temperature capable of regenerating the drying agent in the second drying tower, the heat supplementing mechanism can be a heater or the like, the heat supplementing mechanism can adopt devices known to those skilled in the art, and the specific power, model and the like of the heat supplementing mechanism can be selected according to specific needs.
Specifically, the system for producing hydrogen by electrolyzing water may include a plurality of first drying towers 30 and a plurality of second drying towers 40, wherein the plurality of first drying towers 30 are independently arranged and respectively connected to the catalytic oxidation mechanism, the water electrolysis mechanism 10 and the cooling, separating and washing mechanism, and the plurality of second drying towers 40 are independently arranged and respectively connected to the cooling, separating and washing mechanism; it should be noted that, the plurality of first drying towers 30 may correspond to the plurality of second drying towers 40 one to one, each first drying tower 30 may form a drying unit with one second drying tower 40, of course, each first drying tower 30 may be connected to the plurality of second drying towers 40, each second drying tower may also be connected to the plurality of first drying towers 30, but it is necessary to set a valve for controlling opening and closing on a connection line between the plurality of first drying towers 30 and the plurality of second drying towers 40, so as to control the trend of the mixture.
Specifically, the second drying tower 40 is filled with a drying agent, and the drying agent includes alumina, silica gel, potassium carbonate, and the like; the plurality of second drying towers 40 may be operated in a cycle, that is, the plurality of second drying towers 40 may be sequentially operated in a cycle of three steps of adsorption, heating to regenerate the drying agent, and cooling.
Specifically, the water electrolysis hydrogen production system further comprises a hydrogen collecting and storing mechanism, and the hydrogen collecting and storing mechanism is connected with the second drying tower 40.
Specifically, the water electrolysis mechanism 10 is at least used for preparing and obtaining hydrogen gas contained in the mixed gas derived from the water electrolysis mechanism, the water electrolysis mechanism 10 includes an electrolytic cell, a pure water supplement mechanism, an electrolyte recovery supplement mechanism, and the like, and the water electrolysis mechanism 10 may adopt a commercially available device, and the structure thereof is not particularly limited.
The water electrolysis hydrogen production is a convenient method for producing hydrogen. Direct current is introduced into an electrolytic cell filled with electrolyte, and water molecules are subjected to electrochemical reaction on electrodes and are decomposed into hydrogen and oxygen.
When a direct current is applied to some aqueous electrolyte solutions, the substance to be decomposed is completely unrelated to the original electrolyte, and water is decomposed as a solvent, and the original electrolyte remains in the water, and sulfuric acid, sodium hydroxide, potassium hydroxide and the like are all the electrolytes.
In the electrolysis of water, since pure water has a low ionization degree and a low conductivity, and is typically a weak electrolyte, the electrolyte needs to be added to increase the conductivity of the solution, so that water can be smoothly electrolyzed into hydrogen and oxygen.
Specifically, the catalytic combustor 20 is at least used for causing hydrogen and oxygen in the mixed gas to perform a catalytic reaction and raising the temperature of the mixed gas to be higher than a specified temperature, the catalytic combustor 20 is filled with an oxyhydrogen reaction catalyst, the oxyhydrogen reaction catalyst may be active copper, nickel-chromium alloy, palladium molecular sieve, palladium alumina, palladium carbon fiber, platinum alumina, ruthenium alumina, rhodium alumina, or the like, the catalytic combustor 20 may be commercially available, and the specific structure thereof is not specifically limited.
Specifically, the cooling, separating and washing mechanism may be an existing device, which includes a cooler, a separator, a washer, and the like, and the specific structure thereof is not particularly limited.
Specifically, the embodiment of the utility model provides a working process and the principle of electrolytic water hydrogen production system include at least:
hydrogen is generated through electrolysis of the water electrolysis mechanism 10, and the hydrogen generated by the water electrolysis mechanism 10 comprises a small amount of oxygen, a certain amount of water vapor and electrolyte;
the mixed gas is firstly introduced into a catalytic combustor 20, under the action of a proper amount of catalyst, hydrogen and oxygen generate controllable reaction, the oxygen is removed and releases heat, and the temperature of the mixed gas is raised to be higher than the specified temperature required by the regeneration of a drying agent;
introducing the mixed gas into the first drying tower 30, and fully exchanging heat with the second drying tower 40, wherein the temperature of the drying agent in the second drying tower 40 is within a temperature range enabling the drying agent to be regenerated, and the second drying tower 40 can be pumped to a negative pressure regeneration atmosphere or environment through a vacuum pump;
after the mixed gas is led out from the first drying tower 30, most of low-boiling-point impurities are removed after the mixed gas is subjected to separation, washing, cooling and other treatment, the rest of the mixed gas enters the second drying tower 40, the drying agent in the second drying tower 40 is in an adsorption state, and after micro moisture in the mixed gas is adsorbed, pure hydrogen is obtained at the outlet of the second drying tower 40.
Certainly, the embodiment of the utility model provides a working process of electrolytic water hydrogen production system still includes:
the drying agents in the second drying towers 40 are sequentially circulated for adsorption and regeneration, each cycle comprises three processes of adsorption, heating regeneration and cooling, and the time length of each process is determined according to the number of the second drying towers and the adsorption capacity of the drying agents.
Specifically, the high-temperature mixed gas obtained after catalytic oxidation only flows into the first drying tower corresponding to the second drying tower in the heating regeneration stage, and no high-temperature mixed gas flows in the first drying tower corresponding to the second drying tower in the cooling stage.
The heat required by the regeneration of a plurality of drying agents exceeds the heat supplied by the high-temperature mixed gas in the first drying tower, and the heat compensator supplies the rest energy.
Example 1
A hydrogen production system (ALK) by alkaline electrolysis of water comprises a catalytic burner 20, 3 jacketed drying towers and a vacuum pump, wherein during normal operation, hydrogen is generated by a cathode of an electrolytic cell, the dry basis of the hydrogen is about 99.8 percent of hydrogen and 0.2 percent of oxygen, and a certain amount of water vapor and electrolyte are contained.
Specifically, the working process of the alkaline electrolyzed water hydrogen production system (ALK) comprises the following steps: hydrogen firstly flows into a catalytic combustor 20, the hydrogen and oxygen generate catalytic reaction to release heat and generate a small amount of water vapor in the catalytic combustor 20, the obtained hot hydrogen has the temperature of about 110-, the same applies below); the inner layers of the three jacketed drying towers are filled with potassium carbonate as drying agents, and the drying agents in the jacketed drying towers adsorb residual trace moisture until the humidity of the gas reaches the specified standard.
In the process, the gas inlet 41 and the gas outlet 42 of the inner layer of the jacketed drying tower are closed, the vacuumizing gas outlet 43 is opened, the inner layer of the jacketed drying tower is vacuumized by a vacuum pump, and the drying agent filled in the inner layer of the jacketed drying tower A is in a vacuum heating regeneration stage; a gas inlet and a gas outlet of the inner layer of the jacketed drying tower B are opened, a vacuumizing gas outlet is closed, and the jacket drying tower B is in an adsorption state; all outlets and inlets of the jacketed drying tower C are closed and in a cooling state, and the cycle operation timing sequence of the three jacketed drying towers is shown in table 1.
Compared with the prior art, the hydrogen production system by water electrolysis provided by the embodiment of the utility model has simple structure and convenient use, and can recycle the heat in the subsequent treatment process of hydrogen, thereby saving the energy consumption in the preparation and collection of hydrogen and further reducing the production cost; and, the embodiment of the utility model provides a pair of electrolytic water hydrogen manufacturing system utilizes the catalytic oxidation combustor to desorption the trace oxygen in the hydrogen, emits the heat simultaneously to retrieve this heat and the partial sensible heat of gas, and utilize the heat of retrieving to heat the drier and regenerate, reduced the energy consumption of drier at regeneration process.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and therefore, the protection scope of the present invention should not be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A system for producing hydrogen by electrolyzing water, comprising: the device comprises an electrolytic water mechanism, a catalytic oxidation mechanism, at least one first drying mechanism, a cooling separation washing mechanism and at least one second drying mechanism which are sequentially connected, wherein the first drying mechanism is also connected with the electrolytic water mechanism, and the second drying mechanism is also in heat conduction connection with the first drying mechanism; wherein,
the water electrolysis mechanism is at least used for preparing and obtaining hydrogen, and the hydrogen is contained in the mixed gas led out from the water electrolysis mechanism;
the catalytic oxidation mechanism is at least used for enabling hydrogen and oxygen in the mixed gas to generate catalytic reaction and enabling the temperature of the mixed gas to rise above a specified temperature;
the first drying mechanism is at least used for exchanging heat with the mixed gas and condensing part of gas in the mixed gas to form a liquid-phase medium, and the liquid-phase medium flows back to the water electrolysis hydrogen production mechanism;
the cooling separation washing mechanism is at least used for removing low-boiling-point impurities in the mixed gas;
the second drying mechanism is at least used for removing moisture in the mixed gas so as to obtain high-purity hydrogen.
2. The system for producing hydrogen by electrolyzing water according to claim 1, characterized in that: the first drying mechanism comprises a first drying tower, and the first drying tower is provided with an air inlet connected with the catalytic oxidation mechanism, an air outlet connected with the cooling, separating and washing mechanism and a liquid reflux outlet connected with the water electrolysis mechanism.
3. A system for producing hydrogen by electrolyzing water as claimed in claim 2, wherein: the second drying mechanism comprises a second drying tower, one end of the second drying tower is provided with an air inlet connected with the cooling, separating and washing mechanism, the other end of the second drying tower is provided with an air outlet, the second drying tower is arranged outside the first drying tower, the tower wall of the second drying tower is in heat conduction connection with the tower wall of the first drying tower, or the second drying tower is overlapped with part of the tower wall of the first drying tower.
4. A system for producing hydrogen by electrolyzing water as claimed in claim 2, wherein: the second drying mechanism comprises a second drying tower, one end of the second drying tower is provided with an air inlet connected with the cooling, separating and washing mechanism, and the other end of the second drying tower is provided with an air outlet, wherein the second drying tower is arranged inside the first drying tower;
and/or the first drying tower and the second drying tower are arranged into a whole and are formed by separating good heat conduction metal.
5. The system for producing hydrogen by electrolyzing water according to claim 3 or 4, characterized in that: and at least the tower wall of the second drying tower is a metal layer with good heat conductivity.
6. The system for producing hydrogen by electrolyzing water according to claim 5, characterized in that: and a heat insulation layer is arranged outside the first drying tower and/or the second drying tower, or the first drying tower and the second drying tower are arranged in a heat insulation structure.
7. The system for producing hydrogen by electrolyzing water according to claim 5, characterized in that: the second drying tower is further connected with a vacuum pump, and the vacuum pump is at least used for forming a negative pressure environment in the second drying tower.
8. The system for producing hydrogen by electrolyzing water according to claim 5, characterized in that: the second drying tower is also connected with a heat supplementing mechanism, and the heat supplementing mechanism is at least used for heating the second drying tower so as to enable the temperature in the second drying tower to reach a specified temperature capable of enabling the drying agent in the second drying tower to be regenerated.
9. The system for producing hydrogen by electrolyzing water according to claim 1, comprising a plurality of first drying mechanisms and a plurality of second drying mechanisms, wherein the plurality of first drying mechanisms are arranged independently of each other and are respectively connected with the catalytic oxidation mechanism, the water electrolysis mechanism and the cooling, separating and washing mechanism, and the plurality of second drying mechanisms are arranged independently of each other and are respectively connected with the cooling, separating and washing mechanism;
and/or the water electrolysis hydrogen production system further comprises a hydrogen collecting and storing mechanism, and the hydrogen collecting and storing mechanism is connected with the second drying mechanism.
10. The system for producing hydrogen by electrolyzing water according to claim 1, characterized in that: the water electrolysis mechanism comprises an electrolytic bath, a pure water supplementing mechanism and an electrolyte recycling and supplementing mechanism;
and/or, the catalytic oxidation mechanism comprises a catalytic burner;
and/or the cooling separation washing mechanism comprises a cooler, a separator and a washer.
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| CN202022620017.0U CN213596423U (en) | 2020-11-13 | 2020-11-13 | Water electrolysis hydrogen production system |
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Inventor after: Zhao Hong Inventor after: Wang Haicheng Inventor after: Zhen Chongli Inventor before: Zhao Hong Inventor before: Zhang Jie Inventor before: Wang Haicheng Inventor before: Liang Xin |