CN109626333B - Electrochemistry ceramic membrane oxygen generator and oxygen generating equipment thereof - Google Patents
Electrochemistry ceramic membrane oxygen generator and oxygen generating equipment thereof Download PDFInfo
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- CN109626333B CN109626333B CN201910074248.5A CN201910074248A CN109626333B CN 109626333 B CN109626333 B CN 109626333B CN 201910074248 A CN201910074248 A CN 201910074248A CN 109626333 B CN109626333 B CN 109626333B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0251—Physical processing only by making use of membranes
- C01B13/0255—Physical processing only by making use of membranes characterised by the type of membrane
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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
- B01D53/32—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 by electrical effects other than those provided for in group B01D61/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/12—Oxygen
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/001—Physical processing by making use of membranes
- C01B2210/0012—Physical processing by making use of membranes characterised by the membrane
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- General Chemical & Material Sciences (AREA)
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Abstract
The application discloses oxygen machine is produced to electrochemistry ceramic membrane and oxygen generating equipment thereof relates to oxygen generation technical field. The electrochemical ceramic membrane oxygen generator comprises a ceramic membrane stack, an airflow distributor, a heater, a double-helix exchanger and a thermal isolation sleeve; the ceramic membrane stack comprises electrochemical ceramic membranes which are vertically and parallelly stacked and one side of each electrochemical ceramic membrane is closed to form a vertical cavity, the other side of each electrochemical ceramic membrane stack is connected with an oxygen output pipe through a ceramic pipe, the bottom of the ceramic membrane stack is tightly pressed with the upper surface of an airflow distributor, and a heater is arranged at the lower end of the airflow distributor; and double-spiral heat exchangers are wrapped outside the ceramic membrane stack, the airflow distributor and the heater, thermal isolation sleeves are sleeved at two ends of the double-spiral heat exchangers, and the double-spiral interaction device is arranged. The electrochemical ceramic membrane oxygen generator and the oxygen generating equipment thereof can be used for preparing pure oxygen, high-purity oxygen and ultra-pure oxygen on site, are small in size, light in weight and low in cost, and are suitable for rapid deployment.
Description
Technical Field
The application relates to the technical field of oxygen generation, in particular to an electrochemical ceramic membrane oxygen generator and oxygen generation equipment thereof.
Background
At present, oxygen is mainly obtained by separation, and three technical methods of air separation are adopted: cryogenic method, adsorption method, organic membrane separation method.
A deep cooling method: the method is characterized in that the air is liquefied through a series of processes by utilizing the difference of the boiling points of all components in the air, and the different components are separated through rectification. The method can realize the full separation of air components, the fine purification of products, the large-scale device and the dual-element state (liquid state and gaseous state), so the industrialization of the production device is dominant. Cryogenic air separation is currently the most widely used industrial application. The concentration of the oxygen produced by the cryogenic method can reach more than 99.5 percent, but pure oxygen, high-purity oxygen and ultra-pure oxygen cannot be directly produced.
An adsorption method: the purpose of finally separating oxygen is achieved by utilizing the selective adsorption of the molecular sieve on nitrogen molecules, and the technical process is simple, convenient to operate and low in running cost. The oxygen concentration reaches 96% at most, the number of moving parts is large, regular maintenance is needed, and the failure rate is high.
Organic membrane separation method: the organic membrane separation method is to make oxygen in air pass through membrane preferentially under the driving of pressure difference by utilizing the difference of permeation rate of each component in air when it passes through membrane so as to obtain oxygen-enriched air. The organic membrane separation technology is a new technology and has the advantages of low energy consumption, flexible operation and the like. The research of organic membranes is applied to medical treatment, fermentation industry, chemical industry, oxygen-enriched combustion and the like. Because the oxygen-nitrogen separation coefficient of the organic film is low, the thermal stability is poor, the service life is short, and the organic film is easy to block, the purity of an oxygen product is generally less than or equal to 45 percent, and the oxygen generation capacity is small, so that the requirements of the metallurgy industry and the three chemical industries on oxygen consumption and oxygen quality cannot be met.
The existing oxygen generation technology can not simultaneously prepare pure oxygen, high-purity oxygen and ultra-pure oxygen on site, and can not simultaneously meet the oxygen demand of various industries: the cryogenic process gas separation can be realized only in a low-temperature environment below 100K, the investment is large, the cryogenic process gas separation method is only suitable for a large-scale gas separation process, oxygen prepared by the cryogenic process needs to be subpackaged, distributed and stored for medical and other small and medium-scale dispersed application occasions, the fire protection requirement is high, and the existing production and use cannot be realized; the oxygen concentration of the product of the membrane separation method is lower (lower than 45 percent), the scale is suitable for small and medium-sized production, and the product is only suitable for the fields with low oxygen concentration requirements such as eutrophic combustion, medical care and the like at the present stage; the concentration of the product of oxygen production by the adsorption method is lower than 96%, a plurality of moving parts are provided, the noise is large, the regular maintenance is required, the concentration pressure is attenuated along with the increase of the service life, the failure rate is improved, and the use cost is high.
Disclosure of Invention
The application provides an electrochemical ceramic membrane oxygen generator, which comprises a ceramic membrane stack, an airflow distributor, a heater, a double-helix exchanger and a thermal isolation sleeve; the ceramic membrane stack comprises electrochemical ceramic membranes which are vertically and parallelly stacked and one side of each electrochemical ceramic membrane is closed to form a vertical cavity, the other side of each electrochemical ceramic membrane stack is connected with an oxygen output pipe through a ceramic pipe, the bottom of the ceramic membrane stack is tightly pressed with the upper surface of an airflow distributor, and a heater is arranged at the lower end of the airflow distributor; and double-spiral heat exchangers are wrapped outside the ceramic membrane stack, the airflow distributor and the heater, thermal isolation sleeves are sleeved at two ends of the double-spiral heat exchangers, and the double-spiral interaction device is arranged.
As described above, the electrochemical ceramic membrane is a sheet-shaped member made of a composite ceramic material having a six-layer structure, and the six-layer structure sequentially includes the permeable LCM layer, the composite electrode layer, the dense solid oxide electrolyte layer, the composite electrode layer, the permeable LCM layer, and the dense LCM layer from top to bottom.
The electrochemical ceramic membrane is tightly combined with the adjacent layer through sintering, and a microtube for collecting oxygen is arranged between the compact LCM layer and the permeable LCM layer.
As above, wherein the electrode layer is coated at the junction of the ceramic tube and the ceramic membrane stack, the composite electrode layer connecting the electrochemical ceramic membrane sheets, and the microtubes connecting the dense LCM layer and the penetrable LCM layer of each electrochemical ceramic membrane sheet.
The electrochemical ceramic membrane oxygen generator also comprises a sleeve pipe, wherein one part of the sleeve pipe is embedded in the two ends of the double-spiral heat exchanger, and the other part of the sleeve pipe is exposed outside the two ends of the double-spiral heat exchanger.
The application also provides oxygen production equipment which comprises an equipment body, wherein the electrochemical ceramic membrane oxygen generator is fixedly connected in the equipment body, and a control box is also arranged in the equipment body; the control box is electrically connected with the electrochemical ceramic membrane oxygen generator and is used for controlling the electrochemical ceramic membrane oxygen generator to generate oxygen and output oxygen.
As above, wherein the apparatus body comprises a front panel, a rear panel, two parallel side panels, a bottom plate and a cover plate parallel to the bottom plate; the front panel is provided with an operation switch, a control panel, an LED indicator light and a display screen, and a power supply connecting wire and an oxygen output tube extend from the interior of the oxygen generating equipment to the exterior of the rear panel; the side panel is provided with an air vent.
As above, the control box is internally provided with a control chip, a display module, a detection module and a power supply module; the control chip is electrically connected with the display module, the detection module, the power supply module and the electrochemical ceramic membrane oxygen generator; the display module controls the display screen to display the current operation state; the oxygen concentration and the air pressure in the module oxygen generating equipment are detected, and the power supply module is used for supplying power to the whole oxygen generating equipment.
The double-spiral type heat exchanger is characterized in that the two ends of the double-spiral type heat exchanger are respectively provided with a sleeve, the sleeve is exposed out of the two ends of the double-spiral type heat exchanger, and the electrochemical ceramic membrane oxygen generator is fixedly connected with the bracket.
The oxygen generation equipment further comprises an air inlet fan, wherein the air inlet fan is fixed in the equipment body and is arranged to blow wind to the electrochemical ceramic membrane oxygen generator.
The beneficial effect that this application realized is as follows:
(1) the electrochemical ceramic membrane technology is adopted, main components have no moving parts, no noise and no pollution, only electric energy is consumed, 1MPa oxygen flow can be provided without additional compression, and pure oxygen, high-purity oxygen and ultra-pure oxygen can be prepared on site;
(2) the oxygen production capacity of the system can be conveniently expanded by expanding the electrochemical ceramic membrane oxygen production module, a more complex oxygen production device is formed, the technology is optimal, and the structure is simple and reliable.
(3) Compared with the traditional air separation mode, the method is more economical, the cost of each cubic of high-purity oxygen is about 2 degrees electricity, but the method is small in size and light in weight, is suitable for rapid deployment, and saves the use cost of maintaining and purchasing a gas cylinder and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is an external structural view of an oxygen plant provided in an embodiment of the present application;
FIG. 2 is a structural diagram of the interior of an oxygen plant provided in an embodiment of the present application;
FIG. 3 is a connection diagram of control box components in an oxygen plant provided by an embodiment of the present application;
FIG. 4 is a cross-sectional view of an electrochemical ceramic membrane oxygen generator;
FIG. 5 is a longitudinal cut view of an electrochemical ceramic membrane oxygen generator;
fig. 6 is a structural view of an electrochemical ceramic membrane sheet constituting a ceramic membrane stack in an electrochemical ceramic membrane oxygen generator.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 some, not all, embodiments of the present invention. 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.
As shown in fig. 1, the present embodiment provides an oxygen production apparatus, which includes an apparatus body 1, where the apparatus body 1 is a rectangular parallelepiped surrounded by a front panel 11, a rear panel 12, two parallel side panels (not shown), a bottom plate 13, and a cover plate 14 parallel to the bottom plate 13. An operation switch 111, a control panel 112, an indicator light 113 and a display screen 114 are arranged on the front panel 11, wherein the operation switch 111 is used for controlling the oxygen production equipment to be turned on or turned off, the control panel 112 is used for facilitating a user to select the requirement of oxygen purity, the indicator light 113 is used for indicating the current state of the oxygen production equipment, for example, a green light is displayed to ensure normal operation, a red light is displayed to warn abnormal oxygen production, and the display screen 114 is used for displaying prompt information; the power supply connecting wire and the oxygen output pipe extend from the interior of the oxygen generating equipment to the exterior of the rear panel; preferably, the side panels are opened at the upper and lower ends thereof with air vents 15, which may be provided as louvers or honeycomb-shaped air vents, etc.
With continuing reference to fig. 2, fig. 2 is a schematic diagram of the internal structure of the oxygen plant. In the embodiment of the application, the inside of the equipment body 1 is divided into the control box 2 and the oxygen generating box 3 by the baffle, the area close to the front panel is the control box 2, as shown in fig. 3, a control chip 21, a display module 22, a detection module 23 and a power supply module 24 are arranged in the control box 2, wherein the control chip 21 is connected with the display module 22, the detection module 23 and the power supply module 24 by leads, and the control chip 21 uniformly controls each part to operate correctly according to set parameters to monitor the operation state of the whole machine; the display module 22 controls the display screen 114 on the front panel 11 to display the current operating state, including prompt information such as oxygen generation start, current output oxygen purity, please use for reassurance, etc.; the detection module 23 is used for detecting the oxygen concentration and the air pressure in the oxygen generating tank, and the power supply module 24 is used for supplying power to the whole oxygen generating equipment.
An oxygen production box 3 is arranged in an area formed by the baffle and the rear panel in the equipment body 1, an electrochemical ceramic membrane oxygen generator 31 is arranged in the oxygen production box 3, and the electrochemical ceramic membrane oxygen generator 31 is fixed on a bottom plate 13 of the oxygen production equipment; the electrochemical ceramic membrane oxygen generator 31 is a hollow cylinder with two ends being reduced, the openings at the two ends of the cylinder of the electrochemical ceramic membrane oxygen generator 31 are respectively connected with a trapezoidal support 32 through fixing bolts, specifically, first fixing holes are formed in the two sides of the opening edges at the two ends of the electrochemical ceramic membrane oxygen generator, second fixing holes are formed in the top ends of two bevel edge supports of the trapezoidal support 32, the first fixing holes of the electrochemical ceramic membrane oxygen generator 31 and the second fixing holes of the trapezoidal support 32 are screwed in a matched mode through fixing bolts and nuts, and the bases of the two trapezoidal supports 32 are respectively fixed on the bottom plate 13 of the equipment body through bolts; an air inlet fan 33 is fixedly arranged in the oxygen generating box 3, the air inlet fan 33 blows air to the electrochemical ceramic membrane oxygen generator 31, and preferably, the air inlet fan 33 is arranged at the bottom of the electrochemical ceramic membrane oxygen generator 31 and fixed on the bottom plate 13.
In this embodiment, the lead wires extending from the inside of the electrochemical ceramic membrane oxygen generator 31 to the outside of the openings at the two ends of the cylinder are electrically connected to the control chip 21 and the power supply module 24 in the control box 2, the control chip 21 controls the electrochemical ceramic membrane oxygen generator 31 to perform oxygen generation operation, and the power supply module 24 supplies power to the electrochemical ceramic membrane oxygen generator 31.
With continuing reference to fig. 4 and 5, fig. 4 is a cross-sectional view of the electrochemical ceramic membrane oxygen generator, and fig. 5 is a longitudinal view of the electrochemical ceramic membrane oxygen generator.
In this embodiment, the electrochemical ceramic membrane oxygen generator 31 includes a ceramic membrane stack 311, an airflow distributor 312, a heater 313, a double-spiral heat exchanger 314 wrapped outside the oxygen generating module, a thermal isolation sleeve 315 sleeved at two ends of the double-spiral heat exchanger 314, and a sleeve 316 partially fixed and nested inside two ends of the double-spiral heat exchanger 314, wherein a part of the sleeve 316 is nested inside two ends of the double-spiral heat exchanger 314, please refer to the internal structure diagram of the oxygen generating apparatus of fig. 2, another part of the sleeve 316 is exposed outside the double-spiral heat exchanger 314, and the trapezoidal bracket 32 is fixed on the exposed sleeve 316 by bolts.
The ceramic membrane stack 311 is composed of N (preferably, N is 30, and may be set as required) electrochemical ceramic membranes, the N electrochemical ceramic membranes are vertically stacked in parallel, and one side of the N electrochemical ceramic membranes is sealed to form (N-1) vertical cavities with upper and lower openings, and the stacking of the plurality of electrochemical ceramic membranes can expand the oxygen generation capacity.
Fig. 6 is a structural view of an electrochemical ceramic membrane under a microscope, each electrochemical ceramic membrane is a sheet-shaped member made of a Composite ceramic material having a six-layer structure with a thickness of about 2mm, and the six-layer structure sequentially includes a permeable LCM layer (LCM, Liquid Composite Molding process), a Composite electrode layer (Composite electrode), a dense solid oxide electrolyte layer, a Composite electrode layer, a permeable LCM layer, and a dense LCM layer from top to bottom, wherein the thickness of the solid oxide electrolyte layer is not more than 100 μm, the thinner the electrolyte layer is, the lower the resistance is, the less energy consumed during operation is, and the smaller the thermal stress acting on the electrochemical ceramic membrane is; each layer is tightly bonded to adjacent layers by a sintering process, wherein microtubes (or channels) are provided between the dense LCM layer and the permeable LCM layer for collecting separated oxygen.
Specifically, composite electrode layers are arranged on the upper surface and the lower surface of a solid oxide electrolyte layer in the electrochemical ceramic membrane, namely, for example, an anode film is arranged on the lower surface of the electrolyte layer, and a cathode film is arranged on the upper surface of the electrolyte layer; the electrode materials for forming the anode film and the cathode film are the same material, and can also be different materials; in addition, in order to increase the conductivity of the electrode film, metal silver or metal copper may be added to the conductive material, or a copper film or a silver film may be chemically deposited on the electrode film formed of the electrode material.
The electrode film may cover the entire surface of the electrolyte membrane, that is, the electrode material is coated on the entire upper and lower surfaces of the electrolyte membrane; in order to avoid short-circuiting, the electrode film may be coated only on a partial region of the surface of the electrolyte membrane.
The embodiment of the application also provides a preparation method of the electrochemical ceramic membrane, which specifically comprises the following steps:
s1: preparing a solid oxide electrolyte layer:
as an example, a solid oxide electrolyte layer may be prepared with a gadolinium oxide doped cerium oxide (GCO) electrolyte material as a solid oxide. In addition to selecting gadolinium oxide doped cerium oxide (GCO) as the electrolyte material, in the embodiment of the present invention, samarium oxide doped cerium oxide (SCO) may also be selected as the electrolyte material. In addition, a mixture of gadolinium oxide doped cerium oxide (GCO) and samarium oxide doped cerium oxide (SCO) can be selected as the electrolyte material, and the weight ratio of the gadolinium oxide doped cerium oxide (GCO) to the samarium oxide doped cerium oxide (SCO) can be any proportion.
It should be noted that the size of the electrolyte layer prepared by the embodiment of the present invention can be any size according to the oxygen generation rate.
S2: sintering a composite electrode layer of an anode electrode material on the lower surface of the solid oxide electrolyte layer, sintering a composite electrode layer of a cathode electrode material on the upper surface of the electrolyte membrane:
in the embodiment of the invention, the anode electrode material and the cathode electrode material can be lanthanum strontium manganate La0.8Sr0.2MnO3Lanthanum strontium cobaltite La doped with iron0.6Sr0.4Co0.8Fe0.2O3Iron-doped barium strontium cobaltate Ba0.5Sr0.5Co0.8Fe0.2O3-δOne or two of them.
As an example, lanthanum manganate containing a small amount of metallic silver may be selectedStrontium La0.8Sr0.2MnO3(LSM), method for preparing the electrode material: lanthanum strontium manganate La0.8Sr0.2MnO3(LSM) powder was impregnated with a 2mol/L solution of AgNO3, followed by calcination.
S3: sintering the permeable LCM layer on the upper and lower parts of the electrolyte layer coated with the composite electrode layer:
s4: and continuously sintering the compact LCM layer outside one layer which can penetrate through the LCM layer, and keeping the sintered diaphragm at a certain temperature for a certain time to form the electrochemical ceramic diaphragm.
For example, after sintering, the ceramic membrane is held at 1200 ℃ for 2 hours to bond the materials between the layers to form the electrochemical ceramic membrane.
In the embodiment of the application, one side of the ceramic membrane stack 311 is closed, the ceramic tube 317 is integrally arranged on the other side of the ceramic membrane stack 311, an electrode layer is coated at the joint of the ceramic tube 317 and the ceramic membrane stack 311, and the electrode layer is connected with a composite electrode layer of electrochemical ceramic membranes and is connected with a microtube between a compact LCM layer and a penetrable LCM layer of each electrochemical ceramic membrane for collecting oxygen separated by the electrochemical ceramic membranes; the other end of the ceramic tube 317 is connected with an oxygen output tube 318, preferably, the ceramic tube 317 is reduced to connect with the oxygen output tube 318, the width of the oxygen output tube 318 is set to be smaller than that of the ceramic tube 317, and the width of the oxygen output tube 318 is suitable for users.
In the embodiment, oxygen molecules flowing through the cathode side of the electrochemical ceramic membrane are dissociated into oxygen ions, the oxygen ions generate a large number of movable oxygen vacancy defects when being heated to 750 ℃ by a heater, and the oxygen vacancies move directionally when an electrochemical potential gradient exists, so that the directional transmission of the oxygen ions is realized; the oxygen ions release electrons at one side of the anode of the electrochemical ceramic membrane to recombine into oxygen molecules, high-purity oxygen is obtained by collecting the oxygen molecules through a microtube in the electrochemical ceramic membrane and is output to the outside of the oxygen generating equipment through a ceramic tube and an oxygen output tube for users to use.
Continuing to refer back to fig. 5, the bottom of the ceramic membrane stack formed by stacking the N electrochemical ceramic membranes vertically and in parallel is pressed against the upper surface of an air distributor, preferably the air distributor is a screen-shaped metal plate, air can be uniformly blown to the vertical cavity of the ceramic membrane stack, and the size of the air distributor is set to be the same as that of the ceramic membrane stack; the two ends of the airflow distributor are downwards provided with supports for connecting with heaters, the heaters are arranged to be the same as the ceramic membrane stack in size, the heaters are uniformly tiled into electric heating plates by a plurality of heating rods, and the heat resistance of the electric heating plates needs to be higher than the temperature required by oxygen generation, such as 750 degrees.
Winding a double-spiral heat exchanger outside the ceramic membrane stack, the airflow distributor and the heater along the direction of the oxygen output pipe, wherein the double-spiral heat exchanger is stacked into a spiral shape by a hot fluid pipeline and a cold fluid pipeline, and the hot fluid pipeline and the cold fluid pipeline are separated by a heat exchange partition plate; the double-spiral heat exchanger can reduce heat flow resistance, and the spiral flow enables fluid to form circular flow, so that the heat transfer performance is better.
In this application embodiment, because the internal temperature of the electrochemical ceramic membrane oxygen generator is too high, thermal isolation sleeves are sleeved at two ends of the double-spiral heat exchanger, a thermal isolation area is formed in the electrochemical ceramic membrane oxygen generator, preferably, the width of each thermal isolation sleeve is smaller than the width from the edge of the ceramic membrane stack to the edge of the double-spiral heat exchanger, that is, the width of an area, which is not sleeved with the thermal isolation sleeve, in the middle of the double-spiral heat exchanger should be larger than the width of the internal ceramic membrane stack, so that the exhaust gas can be discharged to the outside of the double-spiral heat exchanger through the largest contact surface.
The oxygen production process of the oxygen production equipment comprises the following steps:
when the power connecting line is connected with a power supply and is electrified, the operation switch on the front panel is turned on, the LED indicating lamp is turned on, the oxygen purity (including pure oxygen, high-purity oxygen and ultra-pure oxygen) which needs to be output at present is set through the control panel, the power supply module supplies power for the electrochemical ceramic membrane oxygen generator, and the control chip controls the electrochemical ceramic membrane oxygen generator to work.
Specifically, fresh air is input from an air inlet fan of the electrochemical ceramic membrane oxygen generator, the fresh air is preheated by a double-spiral heat exchanger, the preheated air is heated to 750 ℃ by a heater, and is uniformly blown to a vertical cavity in a stacked ceramic membrane stack by an airflow distributor, and pure oxygen, high-purity oxygen and ultra-pure oxygen are obtained on the inner surface of an anode by separation of a ceramic membrane. Collecting oxygen into an oxygen channel of the ceramic membrane stack through a micro tube (or a groove) in the ceramic membrane stack, and outputting the oxygen for a user; waste gas rises to the double-spiral heat exchanger from the vertical cavity in the ceramic membrane stack, is cooled by the double-spiral heat exchanger and is discharged to the outside of the machine.
The beneficial effect that this application realized is as follows:
(1) the electrochemical ceramic membrane technology is adopted, main components have no moving parts, no noise and no pollution, only electric energy is consumed, 1MPa oxygen flow can be provided without additional compression, and pure oxygen, high-purity oxygen and ultra-pure oxygen can be prepared on site;
(2) the oxygen production capacity of the system can be conveniently expanded by expanding the electrochemical ceramic membrane oxygen production module to form a more complex oxygen production device.
(3) The technology is optimal, the structure is simple and reliable, and a prototype machine has been verified and tested for 50000 hours.
(4) Compared with the traditional air separation mode, the method is more economical, the cost of each cubic of high-purity oxygen is about 2 degrees, the use cost of maintaining and purchasing a gas cylinder and the like is saved, and the total cost of ownership is optimal.
(5) Small volume and light weight, and is suitable for rapid deployment.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. An electrochemical ceramic membrane oxygen generator is characterized by comprising a ceramic membrane stack, an airflow distributor, a heater, a double-helix exchanger and a thermal isolation sleeve; the ceramic membrane stack comprises electrochemical ceramic membranes which are vertically and parallelly stacked and one side of each electrochemical ceramic membrane is closed to form a vertical cavity, the other side of each electrochemical ceramic membrane stack is connected with an oxygen output pipe through a ceramic pipe, the bottom of the ceramic membrane stack is tightly pressed with the upper surface of an airflow distributor, and a heater is arranged at the lower end of the airflow distributor; wrapping double-spiral heat exchangers outside the ceramic membrane stack, the airflow distributor and the heater, and sleeving thermal isolation sleeves at two ends of the double-spiral heat exchangers;
an air inlet fan is fixed at the bottom of the electrochemical ceramic membrane oxygen generator and blows air to the electrochemical ceramic membrane oxygen generator, a double-spiral exchanger enables fluid to form a circular flow, an air flow distributor is arranged to be a screen-shaped metal plate, and the air is uniformly blown to a vertical cavity of a ceramic membrane stack;
the electrochemical ceramic membrane is a sheet-shaped component formed by composite ceramic materials with a six-layer structure, and the six-layer structure sequentially comprises a first permeable LCM layer, a first composite electrode layer, a compact solid oxide electrolyte layer, a second composite electrode layer, a second permeable LCM layer and a compact LCM layer from top to bottom;
specifically, composite electrode layers are arranged on the upper surface and the lower surface of a solid oxide electrolyte layer in the electrochemical ceramic membrane, namely an anode film is arranged on the lower surface of the electrolyte layer, and a cathode film is arranged on the upper surface of the electrolyte layer;
each layer of the electrochemical ceramic membrane is tightly combined with the adjacent layer through sintering, and a microtube for collecting oxygen is arranged between the compact LCM layer and the second permeable LCM layer.
2. An electrochemical ceramic membrane oxygen generator as claimed in claim 1, wherein the junction of the ceramic tube and ceramic membrane stack is coated with an electrode layer, a composite electrode layer connecting the electrochemical ceramic membrane sheets, and a microtube connecting the dense LCM layer and the second permeable LCM layer of each electrochemical ceramic membrane sheet.
3. An electrochemical ceramic membrane oxygen generator as claimed in claim 1, further comprising a sleeve partially nested inside the two ends of the double-spiral heat exchanger and partially exposed outside the two ends of the double-spiral heat exchanger.
4. An oxygen production device, which comprises a device body, wherein the electrochemical ceramic membrane oxygen generator as claimed in any one of claims 1 to 3 is fixedly connected in the device body, and a control box is also arranged in the device body; the control box is electrically connected with the electrochemical ceramic membrane oxygen generator and is used for controlling the electrochemical ceramic membrane oxygen generator to generate oxygen and output oxygen.
5. The oxygen plant as recited in claim 4, wherein the plant body comprises a front panel, a rear panel, two parallel side panels, a bottom panel, and a cover panel parallel to the bottom panel; the front panel is provided with an operation switch, a control panel, an LED indicator light and a display screen, and a power supply connecting wire and an oxygen output tube extend from the interior of the oxygen generating equipment to the exterior of the rear panel; the side panel is provided with an air vent.
6. The oxygen generation plant of claim 4, wherein a control chip, a display module, a detection module and a power supply module are arranged in the control box; the control chip is electrically connected with the display module, the detection module, the power supply module and the electrochemical ceramic membrane oxygen generator; the display module controls the display screen to display the current operation state; the oxygen concentration and the air pressure in the module oxygen generating equipment are detected, and the power supply module is used for supplying power to the whole oxygen generating equipment.
7. The oxygen plant as recited in claim 4, wherein the tubes of the electrochemical ceramic membrane oxygen generator exposed outside the two ends of the double-spiral heat exchanger are fixedly connected with the support, and the electrochemical ceramic membrane oxygen generator is fixed on the bottom plate of the oxygen plant through the support.
8. The oxygen plant as recited in claim 4, further comprising an inlet fan fixed within the plant body and positioned to direct air toward the electrochemical ceramic membrane oxygen generator.
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| CN201910074248.5A CN109626333B (en) | 2019-01-25 | 2019-01-25 | Electrochemistry ceramic membrane oxygen generator and oxygen generating equipment thereof |
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| CN201910074248.5A CN109626333B (en) | 2019-01-25 | 2019-01-25 | Electrochemistry ceramic membrane oxygen generator and oxygen generating equipment thereof |
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| CN109626333B true CN109626333B (en) | 2019-12-31 |
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| CN110327743A (en) * | 2019-07-27 | 2019-10-15 | 北京汉华元生科技有限公司 | Electrochemistry ceramic membrane oxygen generation system with self heating function |
| CN110240121A (en) * | 2019-07-27 | 2019-09-17 | 北京汉华元生科技有限公司 | With the field hospital's electrochemistry ceramic membrane oxygen generation system for filling bottle function |
| CN110217762A (en) * | 2019-07-27 | 2019-09-10 | 北京汉华元生科技有限公司 | Electrochemistry ceramics nitrogen gas generating system by membrane |
| CN114634164B (en) * | 2022-03-31 | 2024-04-30 | 合肥氢成科技有限公司 | Oxygen purifying device of ceramic oxygen pump and oxyhydrogen fuel cell |
| CN114622231A (en) * | 2022-03-31 | 2022-06-14 | 中国科学技术大学先进技术研究院 | Ceramic hydrogen pump and hydrogen purification device of hydrogen-oxygen fuel cell |
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