CN114199964B - Electrochemical test electrode suitable for subcritical/supercritical water system - Google Patents
Electrochemical test electrode suitable for subcritical/supercritical water system Download PDFInfo
- Publication number
- CN114199964B CN114199964B CN202111508920.0A CN202111508920A CN114199964B CN 114199964 B CN114199964 B CN 114199964B CN 202111508920 A CN202111508920 A CN 202111508920A CN 114199964 B CN114199964 B CN 114199964B
- Authority
- CN
- China
- Prior art keywords
- temperature
- resistant
- pressure
- subcritical
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/301—Reference electrodes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
An electrochemical test electrode suitable for subcritical/supercritical water systems comprises an outer high-temperature and high-pressure resistant metal connecting pipe, a signal test transmission assembly and an end sealing and fastening assembly; the outer high-temperature and high-pressure resistant metal connecting pipe is communicated with the inside of the high-temperature and high-pressure reaction kettle; the signal test transmission assembly comprises an external high-temperature-resistant ceramic tube and a central signal transmission wire, wherein the internal part of the external high-temperature-resistant ceramic tube consists of a signal generation area at the bottom, a ceramic powder filling area at the middle part and high-temperature-resistant filling glue at the top, the signal generation area is used as a probe, stable potential is provided at a determined temperature, the bottom end of the central signal transmission wire is connected with the signal generation area, and the external high-temperature-resistant ceramic tube passes through an external high-temperature-resistant high-pressure metal connecting tube and at least enables the signal generation area to extend into the high-temperature high-pressure reaction kettle; the end sealing fastening assembly is arranged at the top of the outer high-temperature-resistant high-pressure-resistant metal connecting pipe and used for compressing and sealing the external high-temperature-resistant ceramic pipe. The invention can realize in-situ electrochemical test under subcritical/supercritical environment water system.
Description
Technical Field
The invention belongs to the technical field of electrochemical testing, relates to a material corrosion testing and electrochemical energy conversion research instrument under a high-temperature high-pressure water environment system, and particularly relates to an electrochemical testing electrode suitable for a subcritical/supercritical water system.
Background
Subcritical water (Subcritical Water) refers to water which still remains in a liquid state when heated from an atmospheric boiling point temperature (100 ℃) to a supercritical point (374 ℃) thereof under a certain pressure (less than or equal to 22.05 MPa), and has wide application prospects due to the special properties: the subcritical water extraction technology can be used for carrying out environmental sample separation and determination, and subcritical hydrothermal liquefaction can be used for realizing conversion of biomass into biological oil.
Supercritical water refers to water in a special state with temperature and pressure exceeding the critical point (374.15 ℃ and 22.1 MPa), has excellent heat conduction and heat storage capacity, and has been widely used as a thermal medium for large thermal power generating units and future supercritical water cooled reactor nuclear power plants. In addition, the main physical parameters such as density, viscosity, ionic area and dielectric constant are obviously reduced, the diffusion coefficient is higher, the mass transfer performance is good, and the supercritical water can be completely mutually dissolved with nonpolar gases such as oxygen, nitrogen and the like and most of organic matters, so that the rapid development of supercritical water serving as a reactant and a reaction medium in the fields of harmless treatment and recycling of organic pollutants, preparation of new materials, synthesis of new energy, conversion of electrochemical energy and the like is promoted.
However, in subcritical/supercritical water systems, serious equipment corrosion problems generally exist, so that normal operation of a reactor is affected, potential equipment hidden danger is brought, and in-situ electrochemical test research is needed for knowing real-time information of electrochemical corrosion behavior of equipment in high-temperature and high-pressure water environment; meanwhile, in the related studies of electrochemical synthesis and energy conversion using high-temperature and high-pressure water as a medium, it is also necessary to monitor the internal environmental conditions of the reactor such as pH and dissolved oxygen. Currently, electrochemical testing is an international frontier for studying problems related to equipment corrosion in-situ behavior, electrochemical synthesis, energy conversion and the like in subcritical/supercritical water systems.
Electrochemical in situ studies typically use a three-electrode system consisting of a working electrode, a reference electrode, and a counter electrode. The biggest difficulty in developing online electrochemical in-situ research tests under subcritical/supercritical water system is in manufacturing of electrodes. The reference electrode is used as a comparison standard of a measuring electrode system, and the performance of the reference electrode directly influences the accuracy and stability of an electrochemical measuring result, so that the development of the reference electrode suitable for electrochemical measurement in a high-temperature high-pressure water environment system is necessary. The existing high-temperature high-pressure water system reference electrode at present has the following problems:
(1) The high temperature capability is insufficient: the current high temperature resistant upper limit of the reference electrode used in the fields of nuclear power and the like is 250 ℃, and the electrochemical test requirement of a subcritical/supercritical water system above 250 ℃ cannot be met.
(2) High pressure sealing problem: under a subcritical/supercritical water environment system, the sealing material is easy to be influenced by high temperature to fail, so that liquid in the reactor leaks, and potential safety hazards are brought.
(3) Insulation problem: in the electrochemical test process, weak current is required to pass through an external lead of the reference electrode, and insulation protection is difficult to be carried out on a signal generation area and a central transmission lead in the signal test transmission assembly under the high-temperature and high-pressure environment.
Disclosure of Invention
In order to overcome the defects of the prior art, solve the problem that the existing reference electrode cannot be effectively applied to electrochemical test research in high-temperature and high-pressure water environment with the temperature of more than 250 ℃, the invention aims to provide an electrochemical test electrode suitable for a subcritical/supercritical water system, the reference electrode is realized through a signal test transmission component, the cooling protection is carried out on the electrode by adopting a cooling water jacket, and the sealing and fastening component at the end part of the electrode is prevented from losing efficacy due to high temperature, so that the electrode is effectively applied to a supercritical water environment with the temperature of up to 550 ℃, and meanwhile, a high-temperature and high-pressure resistant metal connecting pipe at the outer side can be selected to be welded or connected with a reaction kettle cover through a flange according to requirements, and the like, so that the electrode is convenient to replace.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an electrochemical test electrode suitable for subcritical/supercritical water systems comprises an outer high-temperature and high-pressure resistant metal connecting pipe, a signal test transmission assembly and an end sealing and fastening assembly;
the outer high-temperature and high-pressure resistant metal connecting pipe is communicated with the inside of the high-temperature and high-pressure reaction kettle;
the signal test transmission assembly comprises an external high-temperature-resistant ceramic tube and a central signal transmission wire, wherein the internal part of the external high-temperature-resistant ceramic tube consists of a signal generation region at the bottom, a ceramic powder filling region at the middle part and high-temperature-resistant filling glue at the top, the signal generation region is used as a probe, the probe has stable potential at a determined temperature, the bottom end of the central signal transmission wire is connected with the signal generation region, and the external high-temperature-resistant ceramic tube passes through an external high-temperature-resistant high-pressure-resistant metal connecting tube and at least enables the signal generation region to extend into the high-temperature high-pressure reaction kettle;
the end sealing and fastening assembly is arranged at the top of the outer high-temperature-resistant high-pressure-resistant metal connecting pipe and used for compressing and sealing the external high-temperature-resistant ceramic pipe.
In one embodiment of the invention, a through hole is arranged on the kettle cover of the high-temperature high-pressure reaction kettle, and the outer high-temperature high-pressure resistant metal connecting pipe is connected to the kettle cover and communicated with the inside of the high-temperature high-pressure reaction kettle through the through hole.
In one embodiment of the invention, a cooling water jacket is arranged on the periphery of the outer high-temperature and high-pressure resistant metal connecting pipe.
In one embodiment of the invention, the central signal transmission wire penetrates through the ceramic powder filling area and the high-temperature-resistant filling glue and outwards penetrates out, and the central signal transmission wire wraps the insulating coating layer on the parts of the ceramic powder filling area and the high-temperature-resistant filling glue, and is exposed on the parts of the signal generation area.
In one embodiment of the invention, the external high temperature resistant ceramic tube material is yttria stabilized zirconia, the ceramic powder filling area is filled with zirconia powder, and the insulating coating layer is a quartz tube or yttria stabilized zirconia tube.
In one embodiment of the invention, the signal generating region is filled with a sensitive substance having a definite and stable potential at a subcritical/supercritical water system temperature of 200-550 ℃, and the central signal transmission wire is exposed at a part of the signal generating region and is wrapped by the sensitive substance.
In one embodiment of the invention, the sensitive substance has definite stoichiometric composition and stable components at the temperature of a subcritical/supercritical water system of 200-550 ℃, does not undergo chemical reaction, has single oxidation state and has definite thermodynamic properties.
In one embodiment of the invention, the sensitive substance is a metal and a mixture powder of metal oxides of the metal, or a mixture powder of different metal oxides of the same metal. For example, the sensitive substance may be a mixture powder of magnesium and magnesium oxide, or a mixture powder of ferric oxide and ferric oxide.
In one embodiment of the invention, the end sealing and fastening assembly comprises a pressing piece A, a pressing piece B, an elastic sealing piece, a fastening pressing cap and a sealing and fastening joint, wherein through holes for a central signal transmission wire to pass through are arranged on the pressing piece A, the pressing piece B and the elastic sealing piece, and the central signal transmission wire extending out of the upper end of the high-temperature resistant packing is wrapped with an insulating coating layer and then sequentially passes through the pressing piece B, the pressing piece A and the through holes on the elastic sealing piece to extend to the outside; the sealing fastening joint is connected with the inner thread of the outer high-temperature and high-pressure resistant metal connecting pipe through the outer thread at the bottom; the fastening press cap is connected with the external thread at the upper end of the sealing fastening joint through the internal thread; and the compression piece B and the elastic sealing piece are extruded inwards in the screwing process of the sealing fastening joint, the compression piece A and the elastic sealing piece are extruded downwards in the screwing process of the fastening pressing cap, and the signal test transmission assembly is hung below through a central signal transmission wire wrapping the insulating coating layer.
Compared with the prior art, the invention has the beneficial effects that:
1. temperature and pressure increase tolerated: in the reference electrode, the periphery of the high-temperature high-pressure metal connecting pipe at the outer side is wrapped with the cooling water jacket, the temperature of the sealing and fastening component at the end part of the electrode is reduced by cooling water, so that the sealing material is prevented from losing efficacy, and the stable electrochemical in-situ test can be performed in a high-temperature high-pressure water system at 200-550 ℃.
2. The service life of the signal test transmission assembly of the core is long: in the reference electrode, the signal test transmission assembly is hung to have certain flexibility and is not easy to damage, and various materials are filled in the ceramic tube to form a entity, so that the reference electrode has strong pressure resistance.
3. Realize effective sealing: in the reference electrode, the signal test transmission assembly is effectively sealed by adopting ceramic powder and high-temperature-resistant filling glue, so that the signal generation area is insulated from the external water environment; meanwhile, an end sealing assembly is used for sealing the end of the electrode, so that the problems of leakage of the reaction kettle and the like are prevented.
4. The disassembly and the replacement are convenient: in the reference electrode, the connection mode of the outer high-temperature and high-pressure resistant metal connecting pipe and the high-temperature and high-pressure reaction kettle cover is various, so that the electrode is convenient to maintain and replace, and the reference electrode is applicable to various high-temperature and high-pressure reaction devices.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Wherein: 1. a compressing piece A;2. a pressing piece B;3. the outer side is high-temperature and high-pressure resistant; 4. a cooling water jacket; 5. a kettle cover; 6. an external high-temperature-resistant ceramic tube; 7. a signal generation region; 8. a central signal transmission wire; 9. an insulating coating layer; 10. a ceramic powder filling region; 11. high-temperature-resistant filling glue; 12. an elastic seal; 13. sealing and fastening the joint; 14. and fastening the press cap.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
in the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, the invention is an electrochemical test electrode suitable for subcritical/supercritical water systems, and comprises an outer high-temperature and high-pressure resistant metal connecting pipe 3, a signal test transmission component and an end sealing fastening component.
The outer high-temperature and high-pressure resistant metal connecting pipe 3 is communicated with the inside of the high-temperature and high-pressure reaction kettle and is mainly used as a channel of a signal test transmission assembly.
The signal testing and transmitting assembly mainly comprises an external high-temperature-resistant ceramic tube 6 and a central signal transmission wire 8. The external high-temperature-resistant ceramic tube 6 is arranged in the external high-temperature-resistant high-pressure-resistant metal connecting tube 3, and the bottom of the external high-temperature-resistant ceramic tube extends into the high-temperature high-pressure reaction kettle. The internal part of the external high-temperature-resistant ceramic tube 6 consists of three areas, namely a signal generating area 7 at the bottom, a ceramic powder filling area 10 in the middle and high-temperature-resistant filling glue 11 at the top. The bottom end of the central signal transmission wire 8 is connected with the signal generation area 7, and the part of the external high-temperature-resistant ceramic tube 6 in the high-temperature high-pressure reaction kettle at least comprises the whole signal generation area 7 and can comprise a part of ceramic powder filling area 10.
The end sealing fastening component is arranged at the top of the outer high-temperature and high-pressure resistant metal connecting pipe 3 and mainly used for tightly pressing and sealing the outer high-temperature resistant ceramic pipe 6 in the outer high-temperature and high-pressure resistant metal connecting pipe 3.
According to the structure, in the use process, the signal testing transmission assembly immersed in the subcritical/supercritical high-temperature high-pressure water system has a stable potential at the temperature of the testing environment in the signal generation area 7, oxygen anions generated in the high-temperature high-pressure water pass through the external high-temperature resistant ceramic tube 6, weak current is formed by acting on the central signal transmission wire 8 in the signal generation area 7, and the weak current signal is transmitted to the external electrochemical testing equipment, so that the function of the reference electrode is realized, and the invention can stably work under the high-temperature high-pressure water system at 200-550 ℃.
The electrochemical test target comprises a pH value, a potential value, electrochemical impedance spectrum analysis and the like, and the reference electrode provided by the invention has the function of providing a stable reference value and does not bear a detection task. For example, assuming that the sensitive substance added to the signal generating region 7 is a Hg/HgO mixture, at a certain temperature, for example, 300 ℃, there is a known and stable potential (assuming 100 mV), the potential of the electrode in the 300 ℃ environment is considered to be 100mV (without considering factors such as the liquid connection potential, the simplified principle), and the actual potential value of the electrode to be measured can be obtained by subtracting 100mV from the potential measured by the electrode to be measured in the same environment or adding 100mV to the potential measured by the electrode to be measured. Similarly, at 200 ℃, there is a known and stable potential (assuming 50 mV), then we consider that the potential of the electrode in 200 ℃ environment is 50mV, and using this as a reference, subtracting 50mV from the potential measured by the electrode under test in the same environment or adding 50mV to obtain the actual potential value of the electrode under test.
With continued reference to fig. 1, further implementation details of the present invention are as follows:
the kettle cover 5 of the high-temperature high-pressure reaction kettle is provided with a through hole, and the outer high-temperature high-pressure resistant metal connecting pipe 3 is connected with the kettle cover 5 and communicated with the inside of the high-temperature high-pressure reaction kettle through the through hole. The connection mode can be welding, flange connection and the like, is convenient to detach, and is applicable to various different devices. The outer side high temperature and high pressure resistant metal connecting pipe 3 is wrapped and provided with a cooling water jacket 4, and the temperature of the end sealing and fastening assembly is reduced through cooling water, so that the failure of an elastic component in the end sealing and fastening assembly can be prevented.
The bottom end of the external high temperature resistant ceramic tube 6 is opened and the top end is sealed. Specifically, the signal generating region 7 is insulated and sealed by the ceramic powder filling region 10 and the high temperature resistant filler paste 11. The external high-temperature-resistant ceramic tube 6 has good anion selective permeability so as to ensure weak current. For example, the material of the external refractory ceramic tube 6 may be yttria stabilized zirconia.
The signal generating region 7 is used as a probe, and needs to have a stable potential at a certain temperature, and may be implemented, for example, by filling a sensitive material having a certain and stable potential at a certain temperature, and the central signal transmission wire 8 is exposed at a portion of the signal generating region 7 and is wrapped with the filled sensitive material. The sensitive substance needs to have definite stoichiometric composition, stable components, no chemical reaction, single oxidation state, definite thermodynamic property and temperature-related potential at a specific temperature. Thus, during use, the sensitive material of the signal generating region 7 has a stable potential at the corresponding temperature.
The specific temperature of the invention is at least 200-550 ℃ subcritical/supercritical water system temperature.
In an embodiment of the invention, the sensitive substance may be selected from a mixture powder of a metal and a metal oxide of the metal, for example, a mixture powder of magnesium and magnesium oxide; or a mixture powder of different metal oxides of the same metal, such as a mixture powder of ferric oxide and ferric oxide.
The upper part of the signal generating area 7 is continuously filled with zirconia powder and high-temperature-resistant filling glue 11, so that the middle part of the whole external high-temperature-resistant ceramic tube is a ceramic powder filling area 10, and the upper part is high-temperature-resistant filling glue 11. The central signal transmission wire 8 penetrates through the ceramic powder filling area 10 and the high-temperature-resistant filling adhesive 11 and penetrates outwards, and the part of the central signal transmission wire 8 in the ceramic powder filling area 10 and the high-temperature-resistant filling adhesive 11 can be wrapped with the insulating coating layer 9, but the part of the signal generating area 7 needs to be exposed, so that the signal change of the signal generating area 7 can be obtained. For example, the ceramic powder filling area 10 may be filled with zirconia powder, and the insulating coating layer 9 is a heat shrink tube. In the embodiment of the present invention, the insulating coating 9 may be a quartz tube or a yttria-stabilized zirconia tube.
The end sealing and fastening assembly comprises a pressing piece A1, a pressing piece B2, an elastic sealing piece 12, a fastening pressing cap 14 and a sealing and fastening joint 13, through holes for the central signal transmission wire 8 to pass through are uniformly formed in the pressing piece A1, the pressing piece B2 and the elastic sealing piece 12, and the central signal transmission wire 8 extending out of the upper end of the high-temperature-resistant filling glue 11 sequentially passes through the pressing piece B2, the pressing piece A1 and the through holes in the elastic sealing piece 12 to extend to the outside after wrapping the insulating coating layer 9; the sealing fastening joint 13 is connected with the inner thread of the outer high-temperature and high-pressure resistant metal connecting pipe 3 through the bottom outer thread; the fastening press cap 14 is connected with the external thread at the upper end of the sealing fastening joint 13 through the internal thread; the compression piece B2 and the elastic sealing piece 12 are extruded inwards in the screwing process of the sealing fastening joint 13, the compression piece A1 and the elastic sealing piece 12 are extruded downwards in the screwing process of the fastening press cap 14, and the signal test transmission assembly is hung below through the central signal transmission wire 8 wrapping the insulating coating layer 9, so that certain flexibility of the signal test transmission assembly is ensured, the problems of fracture and the like caused by pressure change are avoided, and meanwhile, the end part is sealed.
The foregoing is merely illustrative of the technical idea of the present invention, and the scope of the present invention is not limited thereto, but any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the scope of the claims of the present invention.
Claims (5)
1. An electrochemical test electrode suitable for subcritical/supercritical water systems is characterized by comprising an outer high-temperature and high-pressure resistant metal connecting pipe (3), a signal test transmission assembly and an end sealing and fastening assembly;
the outer high-temperature and high-pressure resistant metal connecting pipe (3) is communicated with the inside of the high-temperature and high-pressure reaction kettle, and a cooling water jacket (4) is arranged at the periphery of the outer high-temperature and high-pressure resistant metal connecting pipe (3);
the signal test transmission assembly comprises an external high-temperature-resistant ceramic tube (6) and a central signal transmission wire (8), wherein the interior of the external high-temperature-resistant ceramic tube (6) consists of a signal generation region (7) at the bottom, a ceramic powder filling region (10) at the middle and a high-temperature-resistant filling adhesive (11) at the top, the signal generation region (7) is used as a probe, the probe has stable potential at a determined temperature, the bottom end of the central signal transmission wire (8) is connected into the signal generation region (7), and the external high-temperature-resistant ceramic tube (6) extends into the high-temperature high-pressure reaction kettle through an external high-temperature-resistant metal connecting tube (3) at least by the signal generation region (7);
the end sealing and fastening assembly is arranged at the top of the outer high-temperature-resistant high-pressure-resistant metal connecting pipe (3) and is used for tightly pressing and sealing the external high-temperature-resistant ceramic pipe (6);
the signal generation area (7) is filled with a sensitive substance with a definite and stable potential at the temperature of a subcritical/supercritical water system of 200-550 ℃, and the central signal transmission wire (8) is exposed at the part of the signal generation area (7) and is wrapped by the sensitive substance; the sensitive substance has definite stoichiometric composition and stable components at the temperature of a subcritical/supercritical water system of 200-550 ℃, does not generate chemical reaction, has single oxidation state and definite thermodynamic property; the sensitive substance is a mixture powder of magnesium and magnesium oxide or a mixture powder of ferric oxide and ferric oxide;
the end sealing and fastening assembly comprises a pressing piece A (1), a pressing piece B (2), an elastic sealing piece (12), a fastening pressing cap (14) and a sealing and fastening joint (13), wherein through holes for a central signal transmission wire (8) to pass through are uniformly formed in the pressing piece A (1), the pressing piece B (2) and the elastic sealing piece (12), and the central signal transmission wire (8) extending out of the upper end of the high-temperature-resistant filling glue (11) sequentially passes through the pressing piece B (2), the pressing piece A (1) and the through holes in the elastic sealing piece (12) to extend to the outside after wrapping an insulating coating layer (9); the sealing fastening joint (13) is connected with the inner thread of the outer high-temperature and high-pressure resistant metal connecting pipe (3) through the outer thread at the bottom; the fastening press cap (14) is connected with the external thread at the upper end of the sealing fastening joint (13) through the internal thread; the compression piece B (2) and the elastic sealing piece (12) are pressed inwards in the screwing process of the sealing fastening joint (13), the compression piece A (1) and the elastic sealing piece (12) are pressed downwards in the screwing process of the fastening pressing cap (14), and the signal test transmission assembly is hung below through the central signal transmission wire (8) wrapping the insulating coating layer (9).
2. Electrochemical test electrode suitable for subcritical/supercritical water systems according to claim 1, characterized in that the lid (5) of the autoclave is provided with a through hole, and the outer high temperature and high pressure resistant metal nipple (3) is connected to the lid (5) and is connected to the inside of the autoclave through the through hole.
3. Electrochemical test electrode suitable for subcritical/supercritical water systems according to claim 1, characterized in that the central signal transmission wire (8) passes through the ceramic powder filling area (10) and the high temperature resistant filling glue (11) outwards, and the central signal transmission wire (8) wraps the insulating coating layer (9) at the parts of the ceramic powder filling area (10) and the high temperature resistant filling glue (11), and is exposed at the parts of the signal generating area (7).
4. An electrochemical test electrode suitable for subcritical/supercritical water systems according to claim 3, characterized in that the external high temperature resistant ceramic tube (6) is made of yttria stabilized zirconia, the ceramic powder filling area (10) is filled with zirconia powder, and the insulating coating layer (9) is made of quartz tube or yttria stabilized zirconia tube.
5. Electrochemical test electrode suitable for use in subcritical/supercritical water systems according to claim 1, characterized in that the sensitive substance is a metal and a mixture powder of metal oxides of the metal, or a mixture powder of different metal oxides of the same metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508920.0A CN114199964B (en) | 2021-12-10 | 2021-12-10 | Electrochemical test electrode suitable for subcritical/supercritical water system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508920.0A CN114199964B (en) | 2021-12-10 | 2021-12-10 | Electrochemical test electrode suitable for subcritical/supercritical water system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114199964A CN114199964A (en) | 2022-03-18 |
| CN114199964B true CN114199964B (en) | 2023-05-30 |
Family
ID=80652326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111508920.0A Active CN114199964B (en) | 2021-12-10 | 2021-12-10 | Electrochemical test electrode suitable for subcritical/supercritical water system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114199964B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114778649B (en) * | 2022-05-09 | 2024-01-09 | 西安交通大学 | Electrochemical testing device suitable for subcritical/supercritical water system |
| CN114813545B (en) * | 2022-05-09 | 2024-06-18 | 西安交通大学 | Supercritical water system electrochemical corrosion behavior online test system |
| CN114858896B (en) * | 2022-05-09 | 2023-06-27 | 西安交通大学 | Multifunctional electrochemical research platform suitable for subcritical/supercritical water environment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986366A (en) * | 2021-02-24 | 2021-06-18 | 中国核动力研究设计院 | Sensor for in-situ measurement of pH of high-temperature and high-pressure water and measurement method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216288C (en) * | 2002-07-08 | 2005-08-24 | 中国科学院金属研究所 | On-line testing method for PH value of bypass supercritical water oxidation environment and private apparatus thereof |
| CN100575940C (en) * | 2005-02-06 | 2009-12-30 | 张荣华 | A kind of High Temperature High Pressure H 2Chemical sensor and preparation method thereof |
| CN101470093B (en) * | 2008-04-16 | 2012-07-04 | 中国科学院金属研究所 | Working electrode for implementing electro-chemical test of high-temperature high-pressure water solution system |
| CN104792839B (en) * | 2015-03-27 | 2017-04-19 | 中国科学院金属研究所 | Ceramic film electrode capable of realizing electrochemical testing of high-temperature and high-pressure water |
| CN106248760B (en) * | 2016-09-09 | 2018-12-14 | 中广核研究院有限公司 | Measure the solid-phase reference electrode lambda sensor that oxygen activity is dissolved in liquid metal |
| US11428623B2 (en) * | 2019-12-20 | 2022-08-30 | West Virginia University Board of Governors on behalf of West Virginia University | High temperature corrosion sensor |
| CN112098315A (en) * | 2020-10-10 | 2020-12-18 | 西安热工研究院有限公司 | Working electrode for realizing electrochemical test in high-temperature and high-pressure water |
-
2021
- 2021-12-10 CN CN202111508920.0A patent/CN114199964B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986366A (en) * | 2021-02-24 | 2021-06-18 | 中国核动力研究设计院 | Sensor for in-situ measurement of pH of high-temperature and high-pressure water and measurement method |
Non-Patent Citations (2)
| Title |
|---|
| MIN-HAO YUAN等.DC Water Plasma at Atmospheric Pressure for the Treatment of Aqueous Phenol.Environ. Sci. Technol.2010,第44卷(第12期),第4710-4715页. * |
| 李艳辉等.超临界水热燃烧技术研究及应用进展.化工进展.2016,第35卷(第7期),第1942-1955页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114199964A (en) | 2022-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114199964B (en) | Electrochemical test electrode suitable for subcritical/supercritical water system | |
| CN104792839B (en) | Ceramic film electrode capable of realizing electrochemical testing of high-temperature and high-pressure water | |
| CN109731531B (en) | Hydrothermal large-cavity high-temperature high-pressure experimental device and experimental method | |
| CN103398798B (en) | A kind of thermocouple temperature measuring apparatus for hyperbaric environment | |
| CN104634837B (en) | Electrochemical sensor and preparation method thereof | |
| JPH0675048B2 (en) | Conductivity probe for use in the presence of high intensity nuclear radiation | |
| CN103116046B (en) | Preparation method for absorbing mixed fused salt carbon felt electrodes | |
| US6551478B1 (en) | Flexible high-temperature pH probe | |
| CN114858896B (en) | Multifunctional electrochemical research platform suitable for subcritical/supercritical water environment | |
| CN107976468B (en) | In-situ measurement device for conductivity of water rock containing pores | |
| CN206862552U (en) | For measuring the pressure transmitter of high-tension switch gear | |
| CN203396509U (en) | A thermocouple temperature measuring device used under high pressure environment | |
| CN205691995U (en) | The composite control apparatus administered for 750 kilovolts of GIS air chamber excessive water content | |
| WO2016099330A1 (en) | Sensor for sensing hydrogen in gaseous media | |
| CN116399919B (en) | Lead-based fast reactor dissolved oxygen sensor | |
| CN208736825U (en) | For the experiment device for couple corrosion under high temperature and high pressure environment | |
| CN102998031A (en) | Pressure sensor and method for manufacturing same | |
| CN202734918U (en) | High-temperature and high-pressure resistant sectional capacitance level transmitter | |
| JPS5838746B2 (en) | Measuring device and reference electrode for measuring the amount of dissolved oxygen in liquid | |
| CN108565516A (en) | A kind of inner pressure of lithium ion battery monitoring device | |
| CN103123314B (en) | Stress corrosion monitoring system | |
| JP2001174397A (en) | Corrosion potential measuring device | |
| EP3236249B1 (en) | Sensor for sensing hydrogen in liquid and gaseous media | |
| CN208284595U (en) | A kind of inner pressure of lithium ion battery monitoring device and its monitoring system | |
| CN117405582A (en) | Device for online measurement of carbon steel corrosion rate in heating pipe network and use method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |