CN114703493A - System and method for coupling application of hydrogen production by new energy and carbon dioxide capture - Google Patents
System and method for coupling application of hydrogen production by new energy and carbon dioxide capture Download PDFInfo
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- CN114703493A CN114703493A CN202210327219.7A CN202210327219A CN114703493A CN 114703493 A CN114703493 A CN 114703493A CN 202210327219 A CN202210327219 A CN 202210327219A CN 114703493 A CN114703493 A CN 114703493A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 240
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 120
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 120
- 239000001257 hydrogen Substances 0.000 title claims abstract description 85
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 85
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 285
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 180
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 95
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 85
- 239000012528 membrane Substances 0.000 claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000011780 sodium chloride Substances 0.000 claims abstract description 34
- 238000010248 power generation Methods 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 25
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 24
- 238000007670 refining Methods 0.000 claims abstract description 20
- 238000005341 cation exchange Methods 0.000 claims description 54
- 239000003011 anion exchange membrane Substances 0.000 claims description 25
- 238000002360 preparation method Methods 0.000 claims description 25
- 238000012545 processing Methods 0.000 claims description 22
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 20
- 238000005868 electrolysis reaction Methods 0.000 claims description 14
- -1 hydroxide ions Chemical class 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 150000002500 ions Chemical class 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 11
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 10
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 238000005342 ion exchange Methods 0.000 claims description 3
- 229910001415 sodium ion Inorganic materials 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 150000002431 hydrogen Chemical class 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000011161 development Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
- C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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Abstract
The invention discloses a system and a method for coupling application of new energy hydrogen production and carbon dioxide capture, which comprises a new energy power generation device, an ion membrane electrolytic hydrogen production system and a carbon dioxide capture and storage system, wherein the ion membrane electrolytic hydrogen production system comprises a saturated sodium chloride solution refining and concentrating device, a demineralized water adding device for preparing hydrogen and caustic soda, a sodium chloride solution adding device, a demineralized water adding device for preparing hydrochloric acid, a demineralized water adding device for preparing oxygen, an ion membrane electrolytic hydrogen production device, a hydrogen collection and treatment device, a sodium hydroxide solution collection and conveying device, a sodium chloride dilute solution collection and conveying device and a hydrochloric acid solution collection and conveying device; the system and the method can prepare green hydrogen, and simultaneously solve the problems of large energy consumption and high cost of the traditional carbon dioxide trapping technology.
Description
Technical Field
The invention belongs to the technical field of new energy hydrogen production and carbon dioxide capture, and particularly relates to a system and a method for coupling new energy hydrogen production and carbon dioxide capture.
Background
The emission of carbon dioxide does not exist in the hydrogen production process by using new energy, and the generated hydrogen is green hydrogen, so that the hydrogen production method is a future development direction of hydrogen production. The chemical absorption method for capturing the carbon dioxide is an effective way for solving the problem of carbon dioxide generated by burning fossil fuel and realizing the carbon peak reaching and carbon neutralization targets. However, the current carbon capture technology, whether the capture before combustion or after combustion of fossil fuel generally has the problems of large energy consumption and high cost, and has the problem of capturing the carbon emitted in a manner of increasing the carbon emission, which all limit the popularization of the carbon capture technology. In view of the above problems, whether a new energy technology can be used for solving the problems of large energy consumption and high cost of the traditional carbon dioxide capture technology is a future development direction, and the green research meaning for realizing the carbon capture process through the new energy technology is significant.
Therefore, the development of a technology for capturing carbon dioxide by using new energy and preparing green hydrogen simultaneously has important theoretical and application values.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for hydrogen production by new energy and carbon dioxide capture coupling application.
In order to achieve the aim, the system for the new energy hydrogen production and carbon dioxide paving and coupling application comprises a new energy power generation device, an ion membrane electrolysis hydrogen production system and a carbon dioxide trapping and storing system, wherein the ion membrane electrolysis hydrogen production system comprises a saturated sodium chloride solution refining and concentrating device, a demineralized water adding device for preparing hydrogen and caustic soda, a sodium chloride solution adding device, a demineralized water adding device for preparing hydrochloric acid, a demineralized water adding device for preparing oxygen, an ion membrane electrolysis hydrogen production device, a hydrogen collecting and processing device, a sodium hydroxide solution collecting and conveying device, a sodium chloride dilute solution collecting and conveying device and a hydrochloric acid solution collecting and conveying device; the ion membrane electrolytic hydrogen production device comprises a negative electrode, a cation exchange membrane prepared from sodium hydroxide, an anion exchange membrane, a cation exchange membrane prepared from hydrochloric acid and a positive electrode which are sequentially distributed, wherein the positive electrode and the negative electrode are respectively connected with a new energy power generation device;
the inlet of a channel formed between the cathode and the cation exchange membrane prepared by sodium hydroxide is communicated with the outlet of a demineralized water adding device prepared by hydrogen and caustic soda; a hydrogen outlet of a channel formed between the cathode and the sodium hydroxide cation exchange membrane is communicated with a hydrogen collecting and processing device, and a sodium hydroxide solution outlet of a channel formed between the cathode and the sodium hydroxide cation exchange membrane is communicated with a sodium hydroxide solution collecting and conveying device;
the inlet of a channel formed between the sodium hydroxide preparation cation exchange membrane and the anion exchange membrane is communicated with the outlet of the sodium chloride solution adding device, and the outlet of the channel formed between the sodium hydroxide preparation cation exchange membrane and the anion exchange membrane is communicated with the inlet of the sodium chloride dilute solution collecting and conveying device;
an inlet of a channel formed between the anion exchange membrane and the cation exchange membrane prepared by hydrochloric acid is communicated with an outlet of a desalted water adding device prepared by hydrochloric acid; an outlet of a channel formed between the anion exchange membrane and the hydrochloric acid preparation cation exchange membrane is communicated with an inlet of the hydrochloric acid solution collecting and conveying device;
an inlet of a channel formed between the cation exchange membrane prepared by hydrochloric acid and the anode is communicated with an inlet of a demineralized water adding device prepared by oxygen;
the outlet of the sodium hydroxide solution collecting and conveying device and the outlet of the hydrochloric acid solution collecting and conveying device are communicated with the inlet of the carbon dioxide capturing and storing system.
The carbon dioxide capturing and storing system comprises a high carbon dioxide content gas collecting and conveying device, a sodium hydroxide solution storing and conveying device, a hydrochloric acid solution storing and conveying device, a carbon dioxide capturing device, a carbon dioxide separating device and a carbon dioxide collecting and processing device;
the outlet of the sodium hydroxide solution collecting and conveying device is communicated with the inlet of the sodium hydroxide solution storing and conveying device, the outlet of the sodium hydroxide solution storing and conveying device is communicated with the inlet of the carbon dioxide capturing device, the outlet of the hydrochloric acid solution collecting and conveying device is communicated with the inlet of the hydrochloric acid solution storing and conveying device, and the outlet of the hydrochloric acid solution storing and conveying device is communicated with the inlet of the carbon dioxide separating device; the outlet of the high carbon dioxide content gas collecting and conveying device is communicated with a carbon dioxide collecting device, the liquid outlet of the carbon dioxide collecting device is communicated with a carbon dioxide separating device, and the carbon dioxide outlet of the carbon dioxide separating device is communicated with a carbon dioxide collecting and processing device.
The liquid outlet of the carbon dioxide separation device and the liquid outlet of the sodium chloride dilute solution collecting and conveying device are communicated with the inlet of the saturated sodium chloride solution refining and concentrating device.
The ion membrane electrolysis hydrogen production system also comprises an oxygen collecting and processing device; the outlet of the channel formed between the hydrochloric acid preparation cation exchange membrane and the anode is communicated with the oxygen collection and treatment device.
The method for hydrogen production by new energy and carbon dioxide paving coupling application comprises the following steps:
the method comprises the following steps that a new energy power generation device is used for supplying power to a cathode and an anode, a demineralized water adding device prepared from hydrogen and caustic soda is used for introducing demineralized water into a channel formed between the cathode and a sodium hydroxide cation exchange membrane, a sodium chloride solution adding device is used for introducing a saturated sodium chloride solution into a channel formed between the sodium hydroxide cation exchange membrane and an anion exchange membrane, a demineralized water adding device prepared from hydrochloric acid is used for introducing demineralized water into a channel formed between the anion exchange membrane and a hydrochloric acid cation exchange membrane, and a demineralized water adding device prepared from oxygen is used for introducing demineralized water into a channel formed between the hydrochloric acid cation exchange membrane and the anode;
the desalted water is reduced into hydrogen at the negative electrode, hydroxide ions are generated at the same time, under the action of an electric field, sodium ions pass through a cation exchange membrane prepared by sodium hydroxide to be combined with the hydroxide ions to generate sodium hydroxide, the desalted water is oxidized into oxygen at the positive electrode to generate hydrogen ions at the same time, and under the action of the electric field, the generated hydrogen ions pass through a cation exchange membrane prepared by hydrochloric acid to be combined with chloride ions which also pass through an anion exchange membrane under the action of the electric field to generate hydrochloric acid;
the generated hydrogen enters a hydrogen collecting and processing device for drying, compressing and storing;
the generated sodium hydroxide solution is conveyed to a sodium hydroxide solution storage and conveying device by a sodium hydroxide solution collecting and conveying device for storage, and the generated hydrochloric acid solution is conveyed to a hydrochloric acid solution storage and conveying device by a hydrochloric acid solution collecting and conveying device for storage;
the dilute sodium chloride solution after ion exchange is recovered to a saturated sodium chloride solution refining and concentrating device through a dilute sodium chloride solution collecting and conveying device for refining and concentrating;
when carbon dioxide capture is required, the sodium hydroxide solution storage and conveying device conveys the sodium hydroxide solution to the carbon dioxide capture device, gas with high carbon dioxide content in the carbon dioxide capture device and the sodium hydroxide solution run in a countercurrent mode, and excessive carbon dioxide and the sodium hydroxide solution react to generate sodium bicarbonate solution by controlling the conveying flow of the sodium hydroxide solution so as to remove carbon dioxide;
the hydrochloric acid solution storage and conveying device conveys the hydrochloric acid solution to the carbon dioxide separation device, the sodium bicarbonate solution and the hydrochloric acid solution generated by the carbon dioxide capture device in the carbon dioxide separation device run in a countercurrent mode, the conveying flow of the hydrochloric acid solution is controlled, the sodium bicarbonate solution and the hydrochloric acid completely react to generate a sodium chloride solution and carbon dioxide, the generated sodium chloride solution flows back to the saturated sodium chloride solution refining and concentrating device for refining and concentrating, and the generated carbon dioxide enters the carbon dioxide collection and treatment device for drying and compression storage.
The new energy power generation device adopts a power generation mode of wind power generation, photovoltaic power generation, tidal power generation and the like.
The invention has the following beneficial effects:
when the system and the method for coupling the new energy hydrogen production and the carbon dioxide capture are specifically operated, the ion membrane electrolysis hydrogen production system utilizes the electricity output by the new energy power generation device to generate the sodium hydroxide solution, the hydrogen, the oxygen and the hydrochloric acid, so that the high-purity sodium hydroxide and the hydrochloric acid are prepared as the raw materials for capturing the carbon dioxide while preparing the green hydrogen for storing energy, and then the carbon dioxide capture and storage system is utilized for paving and storing the carbon dioxide, so that the problems of large energy consumption and high cost of the traditional carbon dioxide capture technology are solved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic diagram of an apparatus for producing hydrogen by ionic membrane electrolysis 7 according to the present invention.
Wherein, 1 is a saturated sodium chloride solution refining and concentrating device, 2 is a demineralized water adding device prepared from hydrogen and caustic soda, 3 is a sodium chloride solution adding device, 4 is a demineralized water adding device prepared from hydrochloric acid, 5 is a demineralized water adding device prepared from oxygen, 6 is a new energy power generation device, 7 is an ion membrane electrolysis hydrogen production device, 8 is a hydrogen collecting and processing device, 9 is a sodium hydroxide solution collecting and conveying device, 10 is a sodium chloride dilute solution collecting and conveying device, 11 is a hydrochloric acid solution collecting and conveying device, 12 is an oxygen collecting and processing device, 13 is a high-carbon dioxide-content gas collecting and conveying device, 14 is a carbon dioxide collecting and conveying device, 15 is a sodium hydroxide solution storing and conveying device, 16 is a carbon dioxide separating device, 17 is a hydrochloric acid solution storing and conveying device, 18 is a carbon dioxide collecting and processing device, 19 is a cathode, 20 is a cation exchange membrane prepared from sodium hydroxide, 21 is anion exchange membrane, 22 is hydrochloric acid to prepare cation exchange membrane, and 23 is anode.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of the various regions, layers and their relative sizes, positional relationships are shown in the drawings as examples only, and in practice deviations due to manufacturing tolerances or technical limitations are possible, and a person skilled in the art may additionally design regions/layers with different shapes, sizes, relative positions, according to the actual needs.
Referring to fig. 1 and fig. 2, the system for hydrogen production from new energy and carbon dioxide laying coupling application of the invention comprises a new energy power generation device (6), an ionic membrane electrolysis hydrogen production system and a carbon dioxide capture and storage system;
the ion membrane electrolytic hydrogen production system comprises a saturated sodium chloride solution refining and concentrating device 1, a demineralized water adding device 2 for preparing hydrogen and caustic soda, a sodium chloride solution adding device 3, a demineralized water adding device 4 for preparing hydrochloric acid, a demineralized water adding device 5 for preparing oxygen, an ion membrane electrolytic hydrogen production device 7, a hydrogen collecting and processing device 8, a sodium hydroxide solution collecting and conveying device 9, a sodium chloride dilute solution collecting and conveying device 10, a hydrochloric acid solution collecting and conveying device 11 and an oxygen collecting and processing device 12; the carbon dioxide capturing and storing system comprises a high carbon dioxide content gas collecting and conveying device 13, a carbon dioxide capturing device 14, a sodium hydroxide solution storing and conveying device 15, a carbon dioxide separating device 16, a hydrochloric acid solution storing and conveying device 17 and a carbon dioxide collecting and processing device 18;
the ion membrane electrolysis hydrogen production device 7 comprises a negative electrode 19, a sodium hydroxide prepared cation exchange membrane 20, an anion exchange membrane 21, a hydrochloric acid prepared cation exchange membrane 22 and a positive electrode 23 which are sequentially distributed, wherein the positive electrode 23 and the negative electrode 19 are respectively connected with the new energy power generation device 6;
the inlet of a channel formed between the cathode 19 and the sodium hydroxide prepared cation exchange membrane 20 is communicated with the outlet of the demineralized water adding device 2 prepared by hydrogen and caustic soda; a hydrogen outlet of a channel formed between the cathode 19 and the sodium hydroxide preparation cation exchange membrane 20 is communicated with the hydrogen collecting and processing device 8, and a sodium hydroxide solution outlet of a channel formed between the cathode 19 and the sodium hydroxide preparation cation exchange membrane 20 is communicated with the sodium hydroxide solution collecting and conveying device 9;
the inlet of a channel formed between the sodium hydroxide preparation cation exchange membrane 20 and the anion exchange membrane 21 is communicated with the outlet of the sodium chloride solution adding device 3, and the outlet of the channel formed between the sodium hydroxide preparation cation exchange membrane 20 and the anion exchange membrane 21 is communicated with the inlet of the sodium chloride dilute solution collecting and conveying device 10;
the inlet of a channel formed between the anion exchange membrane 21 and the cation exchange membrane 22 prepared by hydrochloric acid is communicated with the outlet of the desalted water adding device 4 prepared by hydrochloric acid; the outlet of a channel formed between the anion exchange membrane 21 and the hydrochloric acid preparation cation exchange membrane 22 is communicated with the inlet of the hydrochloric acid solution collecting and conveying device 11;
an inlet of a channel formed between the hydrochloric acid preparation cation exchange membrane 22 and the anode 23 is communicated with an inlet of the oxygen preparation demineralized water adding device 5, and an outlet of the channel formed between the hydrochloric acid preparation cation exchange membrane 22 and the anode 23 is communicated with the oxygen collection processing device 12;
the outlet of the sodium hydroxide solution collecting and conveying device 9 is communicated with the inlet of the carbon dioxide collecting device 14 through a sodium hydroxide solution storing and conveying device 15, and the outlet of the hydrochloric acid solution collecting and conveying device 11 is communicated with the inlet of the carbon dioxide separating device 16 through a hydrochloric acid solution storing and conveying device 17; the outlet of the high carbon dioxide content gas collecting and conveying device 13 is communicated with the carbon dioxide collecting device 14, the liquid outlet of the carbon dioxide collecting device 14 is communicated with the inlet of the carbon dioxide separating device 16, the carbon dioxide outlet of the carbon dioxide separating device 16 is communicated with the carbon dioxide collecting and processing device 18, and the liquid outlet of the carbon dioxide separating device 16 is communicated with the liquid outlet of the sodium chloride dilute solution collecting and conveying device 10 and the inlet of the saturated sodium chloride solution refining and concentrating device 1.
The specific working process of the invention is as follows:
when the new energy hydrogen production is started, the new energy power generation device 6 is connected with the negative electrode 19 and the positive electrode 23, the demineralized water adding device 2 for preparing hydrogen and caustic soda introduces demineralized water into a channel formed between the negative electrode 19 and the sodium hydroxide cation exchange membrane 20, wherein the flow of the demineralized water is adjusted according to the current density and the concentration of a sodium hydroxide solution, and the current density is controlled to be 3.0kA/m2～9.0kA/m2Controlling the concentration of sodium hydroxide to be about 1 mol/L; a sodium chloride solution adding device 3 introduces saturated sodium chloride solution into a channel formed between a sodium hydroxide preparation cation exchange membrane 20 and an anion exchange membrane 21, a desalted water adding device 4 prepared by hydrochloric acid introduces desalted water into a channel formed between the anion exchange membrane 21 and a hydrochloric acid preparation cation exchange membrane 22, wherein the concentration of hydrochloric acid is about 1mol/L, and a desalted water adding device 5 prepared by oxygen introduces desalted water into a channel formed between the hydrochloric acid preparation cation exchange membrane 22 and an anode 23;
the desalted water is reduced into hydrogen at the negative electrode 19, hydroxide ions are generated at the same time, under the action of an electric field, the sodium ions pass through a sodium hydroxide preparation cation exchange membrane 20 to be combined with the hydroxide ions to generate sodium hydroxide, the desalted water is oxidized into oxygen at the positive electrode 23 to generate hydrogen ions at the same time, and under the action of the electric field, the generated hydrogen ions pass through a hydrochloric acid preparation cation exchange membrane 22 to be combined with chloride ions which also pass through an anion exchange membrane 21 under the action of the electric field to generate hydrochloric acid;
the generated hydrogen enters a hydrogen collecting and processing device 8 for drying and compression storage, and the generated byproduct oxygen enters an oxygen collecting and processing device 12 for drying and compression storage;
the generated sodium hydroxide solution is conveyed to a sodium hydroxide solution storage and conveying device 15 by a sodium hydroxide solution collecting and conveying device 9 to be stored as an absorption liquid for capturing carbon dioxide, and the generated hydrochloric acid solution is conveyed to a hydrochloric acid solution storage and conveying device 17 by a hydrochloric acid solution collecting and conveying device 11 to be stored as a separation liquid for separating carbon dioxide;
the dilute sodium chloride solution after ion exchange is recovered to a saturated sodium chloride solution refining and concentrating device 1 through a dilute sodium chloride solution collecting and conveying device 10 for refining and concentrating;
when carbon dioxide capture is required, the sodium hydroxide solution storage and conveying device 15 conveys the sodium hydroxide solution into the carbon dioxide capture device 14, gas with high carbon dioxide content and the sodium hydroxide solution in the carbon dioxide capture device 14 run in a countercurrent mode, the conveying flow of the sodium hydroxide solution is controlled, so that excessive carbon dioxide and the sodium hydroxide solution react to generate sodium bicarbonate solution to remove carbon dioxide, and gas with low residual carbon dioxide content is directly discharged;
the hydrochloric acid solution storage and transportation device 17 transports the hydrochloric acid solution into the carbon dioxide separation device 16, the sodium bicarbonate solution and the hydrochloric acid solution generated by the carbon dioxide capture device 14 in the carbon dioxide separation device 16 run in a countercurrent mode, the transportation flow rate of the hydrochloric acid solution is controlled, the sodium bicarbonate solution and the hydrochloric acid completely react to generate a sodium chloride solution and carbon dioxide, wherein the hydrochloric acid completely reacts with the sodium bicarbonate solution when the pH value is close to 7.0 by monitoring the pH value of a hydrochloric acid flow path, in addition, the generated sodium chloride solution flows back to the saturated sodium chloride solution refining and concentrating device 1 for refining and concentrating, and the generated carbon dioxide enters the carbon dioxide collection and treatment device 18 for drying and compression storage.
The new energy power generation device 6 is a power supply for hydrogen production by electrolysis, and the power generation mode can be wind power generation, photovoltaic power generation, tidal power generation and the like.
Claims (6)
1. A system for coupling and applying hydrogen production by new energy and carbon dioxide capture is characterized by comprising a new energy power generation device (6), an ionic membrane electrolysis hydrogen production system and a carbon dioxide capture and storage system, wherein the ionic membrane electrolysis hydrogen production system comprises a saturated sodium chloride solution refining and concentrating device (1), a demineralized water adding device (2) for preparing hydrogen and caustic soda, a sodium chloride solution adding device (3), a demineralized water adding device (4) for preparing hydrochloric acid, a demineralized water adding device (5) for preparing oxygen, an ionic membrane electrolysis hydrogen production device (7), a hydrogen collection and treatment device (8), a sodium hydroxide solution collection and conveying device (9), a sodium chloride dilute solution collection and conveying device (10) and a hydrochloric acid solution collection and conveying device (11); the ionic membrane electrolytic hydrogen production device (7) comprises a negative electrode (19), a sodium hydroxide prepared cation exchange membrane (20), an anion exchange membrane (21), a hydrochloric acid prepared cation exchange membrane (22) and a positive electrode (23) which are distributed in sequence, wherein the positive electrode (23) and the negative electrode (19) are respectively connected with the new energy power generation device (6);
an inlet of a channel formed between the cathode (19) and the sodium hydroxide preparation cation exchange membrane (20) is communicated with an outlet of the demineralized water adding device (2) prepared from hydrogen and caustic soda; a hydrogen outlet of a channel formed between the cathode (19) and the sodium hydroxide preparation cation exchange membrane (20) is communicated with the hydrogen collecting and processing device (8), and a sodium hydroxide solution outlet of a channel formed between the cathode (19) and the sodium hydroxide preparation cation exchange membrane (20) is communicated with the sodium hydroxide solution collecting and conveying device (9);
the inlet of a channel formed between the sodium hydroxide preparation cation exchange membrane (20) and the anion exchange membrane (21) is communicated with the outlet of the sodium chloride solution adding device (3), and the outlet of the channel formed between the sodium hydroxide preparation cation exchange membrane (20) and the anion exchange membrane (21) is communicated with the inlet of the sodium chloride dilute solution collecting and conveying device (10);
an inlet of a channel formed between the anion exchange membrane (21) and the cation exchange membrane (22) prepared by hydrochloric acid is communicated with an outlet of the desalted water adding device (4) prepared by hydrochloric acid; an outlet of a channel formed between the anion exchange membrane (21) and the hydrochloric acid preparation cation exchange membrane (22) is communicated with an inlet of the hydrochloric acid solution collecting and conveying device (11);
an inlet of a channel formed between the hydrochloric acid prepared cation exchange membrane (22) and the anode (23) is communicated with an inlet of a desalted water adding device (5) prepared by oxygen;
the outlet of the sodium hydroxide solution collecting and conveying device (9) and the outlet of the hydrochloric acid solution collecting and conveying device (11) are communicated with the inlet of the carbon dioxide capturing and storing system.
2. The system for coupling new energy hydrogen production and carbon dioxide capture as claimed in claim 1, wherein the system for capturing and storing carbon dioxide comprises a high carbon dioxide content gas collecting and conveying device (13), a sodium hydroxide solution storing and conveying device (15), a hydrochloric acid solution storing and conveying device (17), a carbon dioxide capturing device (14), a carbon dioxide separating device (16) and a carbon dioxide collecting and processing device (18);
the outlet of the sodium hydroxide solution collecting and conveying device (9) is communicated with the inlet of a sodium hydroxide solution storing and conveying device (15), the outlet of the sodium hydroxide solution storing and conveying device (15) is communicated with the inlet of a carbon dioxide capturing device (14), the outlet of a hydrochloric acid solution collecting and conveying device (11) is communicated with the inlet of a hydrochloric acid solution storing and conveying device (17), and the outlet of the hydrochloric acid solution storing and conveying device (17) is communicated with the inlet of a carbon dioxide separating device (16); the outlet of the high carbon dioxide content gas collecting and conveying device (13) is communicated with a carbon dioxide collecting device (14), the liquid outlet of the carbon dioxide collecting device (14) is communicated with a carbon dioxide separating device (16), and the carbon dioxide outlet of the carbon dioxide separating device (16) is communicated with a carbon dioxide collecting and processing device (18).
3. The system for coupling hydrogen production from new energy sources and carbon dioxide paving and application as claimed in claim 2, characterized in that the liquid outlet of the carbon dioxide separation device (16) and the liquid outlet of the sodium chloride dilute solution collecting and conveying device (10) are communicated with the inlet of the saturated sodium chloride solution refining and concentrating device (1).
4. The system for hydrogen production from new energy sources and carbon dioxide paving combined application according to claim 1, characterized in that the system for hydrogen production from ion membrane electrolysis further comprises an oxygen collecting and processing device (12); the outlet of a channel formed between the hydrochloric acid prepared cation exchange membrane (22) and the anode (23) is communicated with the oxygen collection and treatment device (12).
5. A method for coupling new energy hydrogen production and carbon dioxide paving application, which is characterized in that the system for coupling new energy hydrogen production and carbon dioxide paving application based on claim 2 comprises the following steps:
a new energy power generation device (6) is used for supplying power to a negative electrode (19) and a positive electrode (23), demineralized water prepared from hydrogen and caustic soda is introduced into a channel formed between the negative electrode (19) and a cation exchange membrane (20) prepared from sodium hydroxide by a demineralized water adding device (2), saturated sodium chloride solution is introduced into a channel formed between the cation exchange membrane (20) prepared from sodium hydroxide and an anion exchange membrane (21) by a sodium chloride solution adding device (3), demineralized water is introduced into a channel formed between the anion exchange membrane (21) and a cation exchange membrane (22) prepared from hydrochloric acid by a demineralized water adding device (4), and demineralized water is introduced into a channel formed between the cation exchange membrane (22) prepared from hydrochloric acid by a demineralized water adding device (5) prepared from oxygen and the channel formed between the cation exchange membrane (22) prepared from hydrochloric acid and the positive electrode (23);
the desalted water is reduced into hydrogen at a negative electrode (19) and simultaneously generates hydroxide ions under the action of an electric field, the sodium ions pass through a sodium hydroxide preparation cation exchange membrane (20) to be combined with the hydroxide ions to generate sodium hydroxide, the desalted water is oxidized into oxygen at a positive electrode (23) and simultaneously generates hydrogen ions, and under the action of the electric field, the generated hydrogen ions pass through a hydrochloric acid preparation cation exchange membrane (22) to be combined with chloride ions which also pass through an anion exchange membrane (21) under the action of the electric field to generate hydrochloric acid;
the generated hydrogen enters a hydrogen collecting and processing device (8) for drying, compressing and storing;
the generated sodium hydroxide solution is conveyed to a sodium hydroxide solution storage and conveying device (15) by a sodium hydroxide solution collecting and conveying device (9) for storage, and the generated hydrochloric acid solution is conveyed to a hydrochloric acid solution storage and conveying device (17) by a hydrochloric acid solution collecting and conveying device (11) for storage;
the dilute sodium chloride solution after ion exchange is recycled to a saturated sodium chloride solution refining and concentrating device (1) for refining and concentrating through a dilute sodium chloride solution collecting and conveying device (10);
when carbon dioxide capture is needed, the sodium hydroxide solution storage and conveying device (15) conveys the sodium hydroxide solution into the carbon dioxide capture device (14), gas with high carbon dioxide content in the carbon dioxide capture device (14) and the sodium hydroxide solution run in a countercurrent mode, and excessive carbon dioxide and the sodium hydroxide solution react to generate sodium bicarbonate solution by controlling the conveying flow of the sodium hydroxide solution so as to remove the carbon dioxide;
the hydrochloric acid solution storage and conveying device (17) conveys the hydrochloric acid solution into the carbon dioxide separation device (16), the sodium bicarbonate solution and the hydrochloric acid solution generated by the carbon dioxide capture device (14) in the carbon dioxide separation device (16) run in a countercurrent mode, the conveying flow rate of the hydrochloric acid solution is controlled, the sodium bicarbonate solution and the hydrochloric acid completely react to generate a sodium chloride solution and carbon dioxide, the generated sodium chloride solution flows back to the saturated sodium chloride solution refining and concentrating device (1) for refining and concentrating, and the generated carbon dioxide enters the carbon dioxide collection and treatment device (18) for drying and compression storage.
6. The method for hydrogen production and carbon dioxide paving combined application by new energy resources as claimed in claim 5, characterized in that the new energy power generation device (6) generates power in a wind power generation mode, a photovoltaic power generation mode or a tidal power generation mode.
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| WO2024016114A1 (en) * | 2022-07-18 | 2024-01-25 | 势加透博（北京）科技有限公司 | Method and device for carbon capture coupled hydrogen production |
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