CN115814702A - Propeller type hydrogen permeation single-window autoclave - Google Patents

Propeller type hydrogen permeation single-window autoclave Download PDF

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Publication number
CN115814702A
CN115814702A CN202211240251.8A CN202211240251A CN115814702A CN 115814702 A CN115814702 A CN 115814702A CN 202211240251 A CN202211240251 A CN 202211240251A CN 115814702 A CN115814702 A CN 115814702A
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CN
China
Prior art keywords
autoclave
single window
propeller
hydrogen permeation
window
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Pending
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CN202211240251.8A
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Chinese (zh)
Inventor
刘翠伟
王财林
李玉星
朱梦泽
张睿
韩辉
徐修赛
胡其会
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China University of Petroleum East China
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China University of Petroleum East China
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Priority to CN202211240251.8A priority Critical patent/CN115814702A/en
Publication of CN115814702A publication Critical patent/CN115814702A/en
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    • 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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/133Renewable energy sources, e.g. sunlight

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  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

The invention relates to the technical field of hydrogen permeation test devices, in particular to a propeller type hydrogen permeation single-window autoclave which comprises an autoclave body and a single window, wherein the autoclave body is provided with the single window; the sample clamp is of a hollow structure, is arranged on the single window, one end of the sample clamp is used for clamping a sample and penetrates through the single window to extend into the kettle body, and the other end of the sample clamp is connected with a hydrogen permeation testing device; the stirring assembly comprises a propeller extending into the kettle body and a drive of the propeller; according to the invention, the propeller disturbs the hydrogen in the high-pressure kettle, and the flow of the hydrogen in the pipeline is simulated, so that the hydrogen permeation degree of the hydrogen to the material in a motion state can be tested.

Description

Propeller type hydrogen permeation single-window autoclave
Technical Field
The invention relates to the technical field of hydrogen permeation test devices, in particular to a propeller type hydrogen permeation single-window autoclave.
Background
Hydrogen energy is a clean, zero-carbon secondary energy source, has high energy density, and has great development potential in future renewable novel energy systems. The hydrogen production by water electrolysis and the byproduct hydrogen production in petrochemical industry, which are renewable energy sources, are the main sources of hydrogen energy, and the hydrogen-doped natural gas transportation and the pure hydrogen transportation are usually completed by pipelines.
Hydrogen enters the metal of the pipeline to influence the plasticity and toughness of the matrix, so that the corrosion of the pipeline is accelerated; hydrogen is adsorbed on the surface of pipeline steel, so that the mechanical property of the pipeline is reduced; after the surface of the material is corroded, hydrogen permeation is easily generated, so that hydrogen embrittlement is caused, and hydrogen induced cracking and corrosion fatigue are generally caused by the hydrogen embrittlement. Therefore, the research on the permeation erosion of the pipe under the hydrogen flowing state is particularly important for conveying natural gas and pure hydrogen by hydrogen doping. The existing hydrogen permeation autoclave can only test the hydrogen permeation degree of hydrogen in a static state, and cannot truly simulate the hydrogen permeation in the dynamic hydrogen conveying process.
Disclosure of Invention
The invention aims to provide a propeller type hydrogen permeation single window autoclave so as to solve the problem that the existing hydrogen permeation autoclave can only test the hydrogen permeation degree of hydrogen in a static state. In order to achieve the above object, the present invention is achieved by the following technical solutions:
the invention provides a propeller type hydrogen permeation single window autoclave, which comprises:
a kettle body with a single window;
the sample clamp is of a hollow structure, is arranged on the single window, one end of the sample clamp is used for clamping a sample and penetrates through the single window to extend into the kettle body, and the other end of the sample clamp is connected with a hydrogen permeation testing device;
and the stirring assembly comprises a propeller extending into the kettle body and a drive of the propeller.
As a further technical scheme, the single-view window is arranged on the side wall of the kettle body and is of a hollow shell structure, and the sample clamp is connected with the sample clamp in a sealing mode.
As a further technical scheme, the single window is of a three-order structure, the first order and the third order are cylindrical, the first order is connected with the side wall of the kettle body, the diameter of the first order is smaller than that of the other orders, the second order is in a horn shape, and the first order and the third order are connected.
As a further technical scheme, the sample clamp comprises a pressing seat and a hexagonal gland, and the hexagonal gland is matched with the third-order thread of the single window to keep the pressing seat matched with the single window.
As a further technical scheme, the pressing seat is of a hollow three-step structure, the first step and the second step are both cylindrical shells, the outer diameter of the second step is larger than that of the first step, and the third step is a cylindrical shell which is obliquely cut.
As a further technical scheme, the first step of the pressing seat is provided with a first clamping part and a second clamping part which are used for clamping the sample.
As a further technical scheme, a pressing cap in threaded fit with the pressing seat is further arranged on the first step of the pressing seat, and the clamping force between the first clamping part and the second clamping part is maintained through the pressing cap.
As a further technical scheme, the hydrogen permeation testing device is an electrolytic cell which is provided with two electrodes, and a sodium hydroxide solution is filled in the electrolytic cell to serve as an electrolyte.
As a further technical scheme, the upper end of the kettle body is provided with a kettle cover, the drive is installed on the kettle cover, and the driven rotating shaft extends into the kettle body.
As a further technical scheme, the propeller consists of four rectangular blades.
The beneficial effects of the invention are as follows:
(1) According to the invention, the sample clamp penetrates through the single window of the autoclave body to send the sample into the autoclave body, the propeller for stirring hydrogen is arranged in the autoclave body, the hydrogen in the autoclave is disturbed by the propeller, the flow of the hydrogen in the pipeline is simulated, and the hydrogen permeation degree of the hydrogen to the material in a motion state can be tested. Compared with the existing autoclave which can only simulate the static state of hydrogen, the simulation effect is more accurate and is closer to the actual situation.
(2) The invention simulates the hydrogen permeation degree of hydrogen to materials under different flowing states by replacing different propeller forms and changing the rotating speed of the propellers.
(3) The single window and the pressure seat are of three-order structures, the single window and the pressure seat form a good assembly relation, the pressure seat and the single window can be fixed through the hexagonal gland at the end part, the sealing structure is arranged between the single window and the pressure seat to prevent hydrogen in the autoclave from leaking, the pressure in the autoclave is ensured to be maintained at a certain value, and the safety of an experimental environment is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention. It will be further appreciated that the drawings are for simplicity and clarity and have not been set forth to scale. The invention will now be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
FIG. 1 shows an isometric view of a propeller-type hydrogen permeation single window autoclave of an embodiment of the present invention;
FIG. 2 shows a front view of a propeller-type hydrogen permeation single window autoclave in an embodiment of the present invention;
FIG. 3 shows a cross-sectional view of a propeller-type hydrogen permeation single window autoclave in an embodiment of the present invention;
FIG. 4 shows an isometric view of a specimen holder in an embodiment of the invention;
FIG. 5 shows a cross-sectional view of a sample holder in an embodiment of the invention;
FIG. 6 shows an isometric view of a mixing head in an embodiment of the invention;
figure 7 shows an isometric view of a propeller in an embodiment of the invention.
In the figure: 1. a kettle cover; 2. a kettle body; 3. a propeller; 4. pressing the cap; 5. a first clamping portion; 6. a second clamping portion; 7. pressing a base; 8. a hexagonal gland bush; 9. a rectangular gland; 10. an electrolytic cell; 11. a sample; 12. a single window; 13. a stirring head; 14. a connecting shaft; 15. and (4) bolts.
Detailed Description
The technical solutions in the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 7, the present embodiment provides a propeller-type hydrogen permeation single window autoclave, which comprises an autoclave body 2, a sample holder, and an agitation assembly, wherein the autoclave body 2 is an autoclave, and the inside thereof can be filled with hydrogen gas. The sample anchor clamps can be used to centre gripping sample and stretch into the internal portion of cauldron for the sample contacts with the internal portion hydrogen of cauldron. The stirring assembly comprises a propeller 3 extending into the kettle body 2 and a drive thereof, and can stir hydrogen in the kettle body to simulate the flow of the hydrogen in a pipeline.
As shown in fig. 1, 2 and 3, the kettle body 2 has a single window 12. The upper end of the kettle body 2 is provided with a kettle cover 1, the kettle cover 1 is driven to be installed on the kettle cover, and the driven rotating shaft extends into the kettle body 2. The drive is a mixing head 13, the rotation axis of which is connected to a connecting shaft 14, the propeller 3 being mounted on the connecting shaft 14.
Be furnished with gas outlet, air inlet, various instruction dials and mix head 13 on the kettle cover 1, mix the head structure as shown in figure 6, adopt current stirring head can, mix the head can be frequently, stir head 13 and kettle cover 1 and pass through threaded connection, and carry out the line between stirring head 13 and the kettle cover 1 and seal. The stirring head 13 is connected to the connecting shaft 14 by a screw, and the connecting shaft 14 is connected to the propeller 3 by a screw. Kettle cover 1 and the kettle body 2 link to each other through bolt 15, and have the internal thread in the single vision window for fixed hexagonal gland 8, and then fixed with the sample anchor clamps.
As shown in fig. 7, the propeller 3 is composed of four rectangular blades, and the flow state of gas under various working conditions can be simulated by replacing the propellers in different forms, so as to explore the hydrogen permeation degree of the sample under various working conditions.
In the embodiment, the propeller disturbs the hydrogen in the autoclave, and the flow of the hydrogen in the pipeline is simulated, so that the hydrogen permeation degree of the hydrogen to the material in a motion state can be tested. Compared with the existing autoclave which can only simulate the static state of hydrogen, the simulation effect is more accurate and is closer to the actual situation.
As shown in figure 3, the single window 12 is located on the side wall of the kettle 2, and is welded with the kettle to form a whole, and is a hollow shell structure, the single window 12 is a three-order structure, the first order and the third order are cylindrical, the first order is connected with the side wall of the kettle 2, and the diameter of the first order is smaller than that of the other orders, the diameter of the third order is larger and is provided with an internal thread, the second order is horn-shaped, and the first order and the third order are connected.
As shown in fig. 4 and 5, the sample clamp is composed of a pressing cap 4, a first clamping portion 5, a second clamping portion 6, a pressing base 7, a hexagonal gland 8 and a rectangular gland 9, and the sample clamp is installed in a single window of the kettle body after being assembled.
The pressing seat 7 is of a hollow three-order structure, the first order and the second order are both cylindrical shells, and a rectangular groove is formed in the inner side of the first order and used for placing an O-shaped sealing ring; the second step external diameter is greater than the first step, and the third step is the cylindrical shell of slant cutting.
The first stage of the pressure foot 7 is provided with a first clamping part 5 and a second clamping part 6 for clamping a test specimen 11. First clamping part 5 is a cylinder, and the degree of depth cylinder is set for to the undercut in the bottom to dig a rectangle recess, set up O shape sealing washer, the round platform of the degree of depth is set for to the undercut in the top, and the bottom of round platform is put in first clamping part 5 tops, constitutes a through-hole jointly. The second clamping part 6 is a cylinder, a round table with a set depth is cut in the bottom, the bottom of the round table is arranged at the bottom of the second clamping part, the cylinder with the set depth is cut in the top, a ring with the set depth is cut outside, a rectangular groove is dug in the top, and an O-shaped sealing ring is arranged.
The first step of the pressure seat 7 is provided with a pressure cap 4 matched with the pressure seat in a threaded manner, the pressure cap 4 is a cylinder, the bottom of the cylinder with the set depth is cut, an internal thread is arranged on the cylinder, the top of the cylinder with the set depth is cut, and the bottom of the circular truncated cone is arranged at the top of the cover cap to jointly form a through hole. The pressing cap 4 is connected with the pressing seat 7 through internal threads.
The sample is a circular thin sheet and is fixed by the first clamping part 5 and the second clamping part 6, the sealing of high-pressure hydrogen is realized by the O-shaped sealing ring, the fixing of the sample 11 is realized by rotating the pressing cap 4, and the clamping force between the first clamping part 5 and the second clamping part 6 is maintained by the pressing cap 4.
One part of the hexagonal gland is a hexagonal prism, the other part of the hexagonal gland is a cylinder and is provided with an internal thread and an external thread, the external thread is connected with the single viewing window of the high-pressure kettle, the internal thread is connected with the rectangular gland, the hexagonal gland is integrally provided with a circular through hole, and the hexagonal gland 8 is matched with the third-order thread of the single viewing window 12 to keep the matching of the pressure seat 7 and the single viewing window 12.
In order to prevent high-pressure gas in the autoclave body from leaking out of the single-view window 12 and the joint of the stirring head and the valve cover, the sample clamp is hermetically connected with the single-view window 12, and meanwhile, the sample and the joint of the stirring head and the valve cover are also hermetically treated. Three O-shaped sealing rings are adopted, and two linear sealing are adopted. The three O-shaped sealing rings are respectively positioned between the first clamping part 5 and the sample 11, between the second clamping part 6 and the sample 11, and between the first stage of the pressing seat 7 and the first stage of the single-view window of the high-pressure single-view window kettle body 2. The linear seal is positioned between the second stage of the pressure seat 7 and the second stage of the single-view window of the high-pressure single-view window kettle body 2 and between the stirring head 13 and the kettle cover 1.
The sample anchor clamps are hollow structure, and one end is used for centre gripping sample 11 and passes single window 12 and stretch into the cauldron body 2 inside, and the other end is connected hydrogen permeation testing arrangement. The hydrogen permeation testing device is an electrolytic cell 10, which is provided with two electrodes and is internally filled with a sodium hydroxide solution serving as an electrolyte. The electrolytic cell 10 is a Devanathan-Stachyrski double-sided electrolytic cell, and the sample 11 is sealed between the high-pressure reaction single window kettle body 2 (hydrogen charging side) and the electrolytic cell 10 (hydrogen measuring side). And taking an Hg/HgO electrode as a reference electrode and a high-purity graphite electrode as an auxiliary electrode.
The whole kettle body is made of Hastelloy, is a nickel-based corrosion-resistant alloy, has good corrosion resistance and thermal stability, and ensures the stability of the kettle body in the experimental process and the experimental safety.
The autoclave of this embodiment is equipped with a stirring head, a propeller, a sample holder, and a hydrogen permeation electrolytic cell device, and simulates hydrogen gas flowing in a pipe by the propeller 3, and real-time hydrogen permeation monitoring of a sample 11 by the electrolytic cell 10, and simulates the hydrogen permeation degree of hydrogen gas to the pipe at different flow rates by adjusting the engine speed.
When the autoclave is assembled, the stirring head 13 is connected with the autoclave cover 1 in a threaded fit manner, the stirring head 13 is connected with the connecting shaft 14 in a threaded fit manner, the selected propeller 3 is connected with the connecting shaft 14 in a threaded fit manner, and the autoclave cover 1 is connected with the single-view-window autoclave body 2 through the bolt 15; three O-shaped sealing rings are arranged in three rectangular grooves of a first clamping part 5 and a second clamping part 6, and a sample is fixed through the first clamping part 5 and the second clamping part 6; the first clamping part 5 and the second clamping part 6 are arranged in a first-step hollow cylinder of a pressing seat 7, a pressing cap 4 is connected with the pressing seat 7 through threads, and a sample 11 is clamped tightly; the hexagonal gland 8 is connected with the single-view window of the single-view window kettle body 2 through threads; the rectangular gland 9 is connected with the hexagonal gland 8 through threads; the electrolytic cell 10 is connected with the rectangular gland 9 in an interference fit manner, and the installation is finished.
When in use, nitrogen is firstly used to remove residual gas in the kettle body, and the nitrogen is filled and discharged for three times. And after the current is stable, filling experimental gas, opening a stirring head, adjusting the revolution number, and performing related experimental detection.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims (10)

1. A propeller-type hydrogen permeation single window autoclave, comprising:
a kettle body with a single window;
the sample clamp is of a hollow structure, is arranged on the single window, one end of the sample clamp is used for clamping a sample and penetrates through the single window to extend into the kettle body, and the other end of the sample clamp is connected with a hydrogen permeation testing device;
and the stirring assembly comprises a propeller extending into the kettle body and a drive of the propeller.
2. The propeller-type hydrogen permeation single window autoclave of claim 1, wherein the single window is formed in a side wall of the autoclave body and has a hollow shell structure, and the sample holder is hermetically connected with the single window.
3. The propeller-type autoclave for hydrogen permeation with single window as claimed in claim 2, wherein the single window has a three-step structure, the first and third steps are cylindrical, the first step is connected to the sidewall of the autoclave body and has a diameter smaller than the other steps, and the second step is horn-shaped and connects the first and third steps.
4. The propeller-type hydrogen infiltration single window autoclave of claim 3, wherein the sample clamp comprises a pressure seat and a hexagonal gland, and the engagement of the pressure seat and the single window is maintained through the cooperation of the hexagonal gland and the third step of the single window.
5. The propeller-type hydrogen permeation single window autoclave of claim 4, wherein the pressure seat is a hollow three-step structure, the first step and the second step are both cylindrical shells, the second step has a larger outer diameter than the first step, and the third step is a cylindrical shell with an oblique cut.
6. The propeller-type hydrogen permeation single window autoclave of claim 4, wherein the first stage of the pressure seat is provided with a first clamping portion and a second clamping portion for clamping a sample.
7. The propeller-type hydrogen permeation single window autoclave of claim 6, wherein the first stage of the pressure seat is further provided with a pressure cap in threaded engagement therewith, and the clamping force between the first clamping portion and the second clamping portion is maintained by the pressure cap.
8. The propeller-type hydrogen permeation single window autoclave of claim 1, wherein the hydrogen permeation testing apparatus is an electrolytic cell equipped with two electrodes and a sodium hydroxide solution is contained therein as an electrolyte.
9. The propeller-type hydrogen permeation single window autoclave of claim 1, wherein the upper end of the autoclave body is provided with an autoclave cover, the drive is mounted on the autoclave cover, and the rotating shaft of the drive extends into the autoclave body.
10. The propeller-type hydrogen infiltration single window autoclave of claim 1, wherein the propeller is comprised of four rectangular blades.
CN202211240251.8A 2022-10-11 2022-10-11 Propeller type hydrogen permeation single-window autoclave Pending CN115814702A (en)

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CN202211240251.8A CN115814702A (en) 2022-10-11 2022-10-11 Propeller type hydrogen permeation single-window autoclave

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6058765A (en) * 1998-07-20 2000-05-09 Intevep, S.A. Apparatus and method for monitoring hydrogen permeation
CN202693457U (en) * 2012-08-14 2013-01-23 中国石油大学(北京) Hydrogen penetration detecting device in high-temperature high-pressure hydrothion environment
CN104897490A (en) * 2014-12-02 2015-09-09 浙江工业大学 Dynamic testing apparatus and testing method for high-pressure hydrogen permeation
BR102015006902A2 (en) * 2015-03-27 2016-12-20 Inst Alberto Luiz Coimbra De Pós Graduação E Pesquisa De Engenharia Coppe Ufrj hydrogen permeation test system and method
CN106872337A (en) * 2017-04-21 2017-06-20 北京科技大学 The experimental provision and application method of hydrogen infiltration under a kind of constant stress stress state
CN108051365A (en) * 2018-01-09 2018-05-18 西安摩尔石油工程实验室股份有限公司 High temperature and pressure hydrogen diffusion test set

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6058765A (en) * 1998-07-20 2000-05-09 Intevep, S.A. Apparatus and method for monitoring hydrogen permeation
CN202693457U (en) * 2012-08-14 2013-01-23 中国石油大学(北京) Hydrogen penetration detecting device in high-temperature high-pressure hydrothion environment
CN104897490A (en) * 2014-12-02 2015-09-09 浙江工业大学 Dynamic testing apparatus and testing method for high-pressure hydrogen permeation
BR102015006902A2 (en) * 2015-03-27 2016-12-20 Inst Alberto Luiz Coimbra De Pós Graduação E Pesquisa De Engenharia Coppe Ufrj hydrogen permeation test system and method
CN106872337A (en) * 2017-04-21 2017-06-20 北京科技大学 The experimental provision and application method of hydrogen infiltration under a kind of constant stress stress state
CN108051365A (en) * 2018-01-09 2018-05-18 西安摩尔石油工程实验室股份有限公司 High temperature and pressure hydrogen diffusion test set

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