CN107502918B - Device for preparing high-pressure hydrogen and oxygen by using grouped electrodes - Google Patents

Device for preparing high-pressure hydrogen and oxygen by using grouped electrodes Download PDF

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Publication number
CN107502918B
CN107502918B CN201710904138.8A CN201710904138A CN107502918B CN 107502918 B CN107502918 B CN 107502918B CN 201710904138 A CN201710904138 A CN 201710904138A CN 107502918 B CN107502918 B CN 107502918B
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conductor
electrode
conductive frame
oxygen
bearing conductive
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CN107502918A (en
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韩炜
丹尼斯·普腾科
李俊志
周亮
韩晓松
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Jilin Guantong Energy Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
    • C25B11/03Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
    • C25B11/031Porous electrodes
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00Electrolytic production of inorganic compounds or non-metals
    • C25B1/01Products
    • C25B1/02Hydrogen or oxygen
    • C25B1/04Hydrogen or oxygen by electrolysis of water
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/36Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention discloses a device for preparing high-pressure hydrogen and oxygen by using grouped electrodes, and belongs to the technical field of energy development. Comprises an electrolysis chamber, an electrode, a first conductor, a second conductor, a first bearing conductive frame, a second bearing conductive frame, a third conductor and a top cover; an electrode chamber is arranged in the electrolysis chamber, electrodes are arranged in the electrode chamber, the electrodes consist of inert electrodes and active electrodes, the electrodes are alternately and rigidly arranged between a first conductor and a second conductor, the active electrodes are fixed on the first conductor, the inert electrodes are fixed on the second conductor, and the first conductor and the second conductor are respectively fixed on a first bearing conductive frame and a second bearing conductive frame; the upper end of the top cover is provided with an exhaust pipe, and the lower end of the electrolysis chamber is provided with a water inlet pipe. The invention adopts the device composed of groups of alternate active and inert electrodes to separately prepare hydrogen and oxygen, improves the pressure of gas, reduces unit energy consumption and improves the productivity of the device under the condition of not using a separation membrane.

Description

Device for preparing high-pressure hydrogen and oxygen by using grouped electrodes
Technical Field
The invention belongs to the technical field of energy development, and particularly relates to a device for preparing high-pressure hydrogen and oxygen by using grouped electrodes.
Background
Hydrogen is the main industrial raw material, is also the most important industrial gas and special gas, and has wide application in petrochemical industry, electronic industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and other aspects. Hydrogen is also an ideal energy source, and thus has attracted research into methods and apparatuses for producing hydrogen. The traditional method for preparing high-pressure hydrogen and oxygen by utilizing alkaline electrolyte to electrolyze water consumes a large amount of electric energy, so that the high-pressure hydrogen and oxygen are difficult to prepare with high efficiency and low energy consumption, and meanwhile, the high-pressure hydrogen and oxygen cannot be prepared under the condition of not using a compression device.
Disclosure of Invention
In order to solve the above problems, the present invention provides an apparatus for preparing high pressure hydrogen and oxygen using a set of electrodes, comprising an electrolysis chamber 1, an electrode 2, a first conductor 5, a second conductor 6, a first load-bearing conductive frame 7, a second load-bearing conductive frame 8, a third conductor 11 and a top cover 12; the top cover 12 is positioned at the upper part of the electrolysis chamber 1 and is connected with the second bearing conductive frame 8 through the third conductive body 11, the first bearing conductive frame 7 and the second bearing conductive frame 8 are vertically arranged in the electrolysis chamber, the first bearing conductive frame 7 is positioned in the middle of the electrolysis chamber 1, the upper end of the first bearing conductive frame is connected with the third conductive body 11, the lower end of the first bearing conductive frame is connected with the bottom of the electrolysis chamber 1, and the second bearing conductive frame 8 is welded on the inner walls at two sides of the electrolysis chamber; an electrode chamber is arranged in the electrolysis chamber 1, an electrode 2 is arranged in the electrode chamber, the electrode 2 consists of an inert electrode 3 and an active electrode 4, the electrodes are alternately and rigidly arranged between a first conductor 5 and a second conductor 6, the active electrode 4 is fixed on the first conductor 5, the inert electrode 3 is fixed on the second conductor 6, and the first conductor 5 and the second conductor 6 are respectively fixed on a first bearing conductive frame 7 and a second bearing conductive frame 8; the first electric conductor 5 is connected with the third electric conductor 11 through the first bearing electric conductor frame 7, and the second electric conductor 6 is connected with the electrolysis chamber 1 through the second bearing electric conductor frame 8; the top cover 12 is provided with an exhaust pipe at the upper end and a water inlet pipe at the lower end of the electrolysis chamber 1.
Further, the active electrode 4 is a metal block made of porous nickel or iron through sintering, the mass is 20-24kg, and the inert electrode 3 is an iron sheet.
Further, the third electric conductor 11 is a disc-shaped flange, and the first electric conductor 5, the second electric conductor 6 and the third electric conductor 11 are all made of steel products.
Further, the electrolytic chamber is filled with alkaline electrolyte, and the mass concentration is 20% -25%.
Further, the number of the electrode chambers is 1-3.
Further, the first bearing conductive frame 7 and the second bearing conductive frame 8 are made of steel products.
Further, the first electric conductor 5 and the second electric conductor 6 are respectively fixed on the first bearing electric conductor frame 7 and the second bearing electric conductor 8 through a first thread 9 and a second thread 10.
The invention relates to a device for preparing high-pressure hydrogen and oxygen by using grouped electrodes, which has the following working principle: first, the electrolytic chamber 1 is filled with an alkaline electrolyte, and the alkaline electrolyte permeates all the components installed in the electrolytic chamber 1, and the electrolytic chamber 1 and the third electric conductor 11 are supplied with a potential having a sign alternating periodically. For example, if a positive potential is applied to the third electrical conductor 11 and a negative potential is applied to the electrolysis chamber 1, since the electrolysis chamber 1 is connected to the second load-bearing conductive frame 8 and, in turn, to the second electrical conductor 6, and the inert electrode 3 is connected to the first electrical conductor 5, that is to say the inert electrode becomes cathodic with the negative potential, hydrogen is released, corresponding reaction (1):
H 2 O+e - =1/2H 2 +OH -
at the same time, the third conductor 11 is connected to the first load-bearing conductive frame 7 and the first conductor 5, and the active electrode 4 is connected to the first conductor 5, so that the active electrode 4 becomes anode by positive potential, the released oxygen is absorbed by the active electrode 4, and the process of releasing hydrogen is continued until the active electrode 4 is completely oxidized. The polarity of the electrodes is changed after complete oxidation. The third conductor 11 is connected to a negative potential and the electrolytic cell 1 is connected to a positive potential. The inert electrode 3 is now in the anodic operating state and the active electrode 4 is in the cathodic operating state. Oxygen is released at the inert electrode 3, corresponding to reaction (2):
2OH - =H 2 O+1/2O 2 +2e -
at the same time, the reduction of the active electrode 4 is carried out, and the released hydrogen is absorbed by the active electrode. The process of releasing oxygen continues until the active electrode 4 is completely reduced. The next cycle is then performed.
That is, only hydrogen is released from the inert electrode during the hydrogen cycle and only oxygen is released from the inert electrode during the oxygen cycle.
The released gas is discharged through an exhaust pipe installed on the top cover 12, and water used in the electrolysis process is injected through a water inlet pipe at the bottom of the electrolysis chamber 1.
Compared with the prior art, the invention has the following advantages:
(1) The invention adopts the device composed of groups of alternate active and inert electrodes to separately prepare hydrogen and oxygen, improves the pressure of gas, reduces unit energy consumption and improves the productivity of the device under the condition of not using a separation membrane.
(2) The installation of active and inert electrode spacers reduces the gas-liquid flow hydraulic resistance in the electrolysis chamber, improves productivity, and ensures high maintainability of the device due to the detachable components, thereby improving the operation safety of the device.
(3) Meanwhile, a plurality of high-voltage electrolytic chambers can be connected in series, and a plurality of groups of electrode groups can be installed in each electrolytic chamber, so that the electrolytic efficiency and the gas yield are greatly improved.
Drawings
FIG. 1 is a schematic structural view of an apparatus for preparing high pressure hydrogen and oxygen using a set of electrodes according to the present invention;
FIG. 2 is a top view of an apparatus for producing high pressure hydrogen and oxygen using unitized electrodes according to this invention;
in the figure: the electrolytic cell comprises an electrolytic chamber 1, an electrode 2, an inert electrode 3, an active electrode 4, a first conductor 5, a second conductor 6, a first bearing conductive frame 7, a second bearing conductive frame 8, a first thread 9, a second thread 10, a third conductor 11 and a top cover 12.
Detailed Description
Example 1
The invention relates to a device for preparing high-pressure hydrogen and oxygen by using grouped electrodes, wherein an electrolysis chamber is a 40-liter high-pressure electrolysis chamber cast by alloy steel, the thickness of the wall of the electrolysis chamber is 6mm, the length of the electrolysis chamber is 1050mm, the diameter of the electrolysis chamber is 219mm, and the weight of the electrolysis chamber is 1.5kg. The method comprises the steps of distributing 3 electrode chambers with the size of 301 х and х 16 in an electrolysis chamber, setting the interval of 60mm, arranging electrodes 2 in the electrode chambers, wherein each electrode 2 consists of an inert electrode 3 and an active electrode 4, the active electrode is 20kg of metal blocks made of porous iron, firstly mixing 20kg of iron powder and 10kg of aluminum powder by using a ball mill, sintering the mixture into blocks in a tubular furnace under the hydrogen atmosphere, setting the sintering temperature at 800 ℃, and putting the metal blocks into 30% potassium hydroxide solution to dissolve aluminum after sintering is completed to form porous metal blocks. The inert electrode is an iron sheet, and the electrolytic chamber is filled with potassium hydroxide solution with concentration of 20%. The first, second and third conductors and the first and second load-bearing frames are made of steel products.
The device consists of an electrolysis chamber 1, an electrode 2, a top cover 12, an active electrode 4, an inert electrode 3, a first conductor 5, a second conductor 6, a first bearing conductive frame 7, a second bearing conductive frame 8, a first thread 9, a second thread 10 and a third conductor 11; wherein an electrode chamber is arranged in the electrolysis chamber, an electrode 2 is arranged in the electrode chamber, the electrode 2 consists of an inert electrode 3 and an active electrode 4, the electrode 2 is alternately and rigidly arranged between a first conductor 5 and a second conductor 6, a third conductor 11 is a disc-shaped flange connection top cover 12 and the electrolysis chamber 1, the upper end of a first bearing conductive frame 7 is welded on the third conductor 11, the lower end is welded at the bottom of the electrolysis chamber 1, and a second bearing conductive frame 8 is symmetrically welded on the inner walls of two sides of the electrolysis chamber 1. The active electrode 4 is fixed on the first conductor 5, the inert electrode 3 is fixed on the second conductor 6, and the first conductor 5 and the second conductor 6 are respectively fixed on the first bearing conductive frame 7 and the second bearing conductive frame 8 through a first thread 9 and a second thread 10; the first electric conductor 5 is connected with the third electric conductor 11 through the first bearing electric conductor frame 7, and the second electric conductor 6 is connected with the electrolysis chamber 1 through the second bearing electric conductor frame 8; the top cover 12 is provided with an exhaust pipe at the upper end and a water inlet pipe at the lower end of the electrolysis chamber 1.
The device works as follows: first, the electrolytic chamber 1 is filled with an alkaline electrolyte, and the alkaline electrolyte permeates all the elements installed in the electrolytic chamber 1, and the electrolytic chamber 1 and the third electric conductor 11 are supplied with a potential having a sign alternating periodically. If a positive potential is applied to the third electrical conductor 11 and a negative potential is applied to the electrolysis chamber 1, the inert electrode 3 is connected to the first electrical conductor 6, since the electrolysis chamber 1 is connected to the second load-bearing conductive frame 8 and to the first electrical conductor 6, i.e. the inert electrode becomes cathodic to release hydrogen, corresponding reaction (1):
H 2 O+e - =1/2H 2 +OH -
at the same time, the third conductor 11 is connected to the first load-bearing conductive frame 7 and the first conductor 5, and the active electrode 4 is connected to the first conductor 5, so that the active electrode 4 becomes anode by positive potential, the released oxygen is absorbed by the active electrode 4, and the process of releasing hydrogen is continued until the active electrode 4 is completely oxidized. The polarity of the electrodes is changed after complete oxidation. The third conductor 11 is connected to a negative potential and the electrolytic cell 1 is connected to a positive potential. The inert electrode 3 is now in the anodic operating state and the active electrode 4 is in the cathodic operating state. Oxygen is released at the inert electrode 3, corresponding to reaction (2):
2OH - =H 2 O+1/2O 2 +2e ②
at the same time, the reduction of the active electrode 4 is carried out, and the released hydrogen is absorbed by the active electrode. The oxygen release process continues until the active electrode 4 is completely reduced, and then the next cycle is performed.
That is, only hydrogen is released from the inert electrode during the hydrogen cycle and only oxygen is released from the inert electrode during the oxygen cycle.
The released gas is discharged through an exhaust pipe installed on the top cover 12, and water used in the electrolysis process is injected through a water inlet pipe at the bottom of the electrolysis chamber 1.
The hydrogen production of the apparatus was 0.8 cubic meter/hour and the oxygen production was 0.4 cubic meter/hour.

Claims (8)

1. An apparatus for producing high pressure hydrogen and oxygen, characterized in that: comprises an electrolysis chamber (1), an electrode (2), a first conductor (5), a second conductor (6), a first bearing conductive frame (7), a second bearing conductive frame (8), a third conductor (11) and a top cover (12); the top cover (12) is positioned at the upper part of the electrolysis chamber (1) and is connected with the second bearing conductive frame (8) through a third conductive body (11), the first bearing conductive frame (7) is vertically arranged in the electrolysis chamber, the first bearing conductive frame (7) is positioned in the middle of the electrolysis chamber (1), the upper end of the first bearing conductive frame (7) is connected with the third conductive body (11), the lower end of the first bearing conductive frame is connected with the bottom of the electrolysis chamber (1), and the second bearing conductive frame (8) is welded on the inner walls of the two sides of the electrolysis chamber; an electrode chamber is arranged in the electrolysis chamber, an electrode (2) is arranged in the electrode chamber, the electrode (2) consists of an inert electrode (3) and an active electrode (4), the electrode is alternately and rigidly arranged between a first conductor (5) and a second conductor (6), the active electrode (4) is fixed on the first conductor (5), the inert electrode (3) is fixed on the second conductor (6), and the first conductor (5) and the second conductor (6) are respectively fixed on a first bearing conductive frame (7) and a second bearing conductive frame (8); the upper end of the top cover (12) is provided with an exhaust pipe, and the lower end of the electrolysis chamber (1) is provided with a water inlet pipe;
wherein the active electrode (4) becomes anode with positive potential, the released oxygen is absorbed by the active electrode (4), the active electrode (4) becomes cathode with negative potential, the released hydrogen is absorbed by the active electrode (4), only hydrogen is released on the inert electrode in hydrogen circulation, and only oxygen is released on the inert electrode in oxygen circulation.
2. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the active electrode (4) is a metal block prepared from porous nickel or iron through sintering, and the mass is 20-24kg.
3. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the inert electrode (3) is an iron sheet.
4. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the third conductor (11) is a disc-shaped flange; the first conductor (5) and the second conductor (6) and the third conductor (11) are made of steel.
5. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the electrolytic chamber (1) is filled with alkaline electrolyte, and the mass concentration is 20% -25%.
6. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the number of the electrode chambers is 1-3.
7. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the first bearing conductive frame (7) and the second bearing conductive frame (8) are made of steel products.
8. An apparatus for producing high pressure hydrogen and oxygen according to claim 1, wherein: the first conductor (5) and the second conductor (6) are respectively fixed on the first bearing conductive frame (7) and the second bearing conductive frame (8) through a first thread (9) and a second thread (10).
CN201710904138.8A 2017-09-29 2017-09-29 Device for preparing high-pressure hydrogen and oxygen by using grouped electrodes Active CN107502918B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB421310A (en) * 1932-03-24 1934-12-18 Druckzersetzer G M B H Improvements in electrolytic decomposing devices
CN1133619A (en) * 1993-09-06 1996-10-16 氢技术有限公司 Improvements in electrolysis systems
UA29392U (en) * 2007-09-24 2008-01-10 A M Pidhornyi Inst Of Problems Device for production of hydrogen and oxygen of high pressure
CN105926001A (en) * 2016-05-04 2016-09-07 吉林大学 High-pressure electrolysis water control system and control method thereof
CN207452267U (en) * 2017-09-29 2018-06-05 吉林科领科技有限公司 The device of high pressure hydrogen and oxygen is prepared using group of electrodes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB421310A (en) * 1932-03-24 1934-12-18 Druckzersetzer G M B H Improvements in electrolytic decomposing devices
US2007096A (en) * 1932-03-24 1935-07-02 Firm Druckzersetzer G M B H Pressure electrolyzer for the production of hydrogen and oxygen
CN1133619A (en) * 1993-09-06 1996-10-16 氢技术有限公司 Improvements in electrolysis systems
UA29392U (en) * 2007-09-24 2008-01-10 A M Pidhornyi Inst Of Problems Device for production of hydrogen and oxygen of high pressure
CN105926001A (en) * 2016-05-04 2016-09-07 吉林大学 High-pressure electrolysis water control system and control method thereof
CN207452267U (en) * 2017-09-29 2018-06-05 吉林科领科技有限公司 The device of high pressure hydrogen and oxygen is prepared using group of electrodes

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Inventor after: Han Wei

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