CN115030883A - Cyclone separator suitable for ionic liquid hydrogen compressor and working method thereof - Google Patents

Cyclone separator suitable for ionic liquid hydrogen compressor and working method thereof Download PDF

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Publication number
CN115030883A
CN115030883A CN202210680890.XA CN202210680890A CN115030883A CN 115030883 A CN115030883 A CN 115030883A CN 202210680890 A CN202210680890 A CN 202210680890A CN 115030883 A CN115030883 A CN 115030883A
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ionic liquid
cyclone
super
outer cylinder
cylinder
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CN115030883B (en
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王玲子
冯健美
郭怡
彭学院
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Xian Jiaotong University
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Xian Jiaotong University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123—Fluid connections
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The invention discloses a cyclone separator suitable for an ionic liquid hydrogen compressor and a working method thereof. The invention realizes the rectification of the liquid film on the wall surface by means of the action of the surface gradient force and the pattern of the leaf vein-shaped super-hydrophilic ionic liquid coating, accelerates the diversion of the liquid film, and ensures that the inner wall surface of the separator is difficult to deposit a sheet of liquid film, thereby effectively reducing the possibility that liquid drops impact the liquid film to splash. The coating can also effectively prevent the hydrogen from directly contacting with the wall surface of the separator, thereby avoiding the hydrogen embrittlement phenomenon and prolonging the service life of the separator.

Description

Cyclone separator suitable for ionic liquid hydrogen compressor and working method thereof
Technical Field
The invention belongs to the field of hydrogen energy storage and transportation equipment, and relates to a cyclone separator suitable for an ionic liquid hydrogen compressor and a working method thereof.
Background
Hydrogen energy has become an important choice for international energy revolution with its ubiquitous, clean nature and potential for commercial deployment. The novel ionic liquid compressor is an ideal scheme for compressing hydrogen in a hydrogen filling station, but during operation, the reciprocating oscillation of the liquid piston can cause the problem of two-phase mixing of hydrogen and ionic liquid. In a hydrogen fuel cell vehicle system, the existence of impurity components can cause catalyst deactivation and seriously affect the performance of the fuel cell vehicle, so the requirement on the purity of hydrogen by a gas end is extremely high. In the existing compressor system, a mechanical separator is usually used as a primary separation device, and fine liquid droplets which are not completely separated are adsorbed by a filter element.
For the ionic liquid hydrogen compressor system, the performance of the gas-liquid separator is very important, because the ionic liquid is very expensive and is 10-25 times of that of common lubricating oil, the efficiency of the gas-liquid separator is improved, the recovery rate of the ionic liquid can be improved, and the running cost of the compressor system is greatly reduced. And the efficiency of the gas-liquid separator is improved, so that the load of the secondary filter element is reduced, and the service life of the filter element with high price is prolonged. In conclusion, the efficient hydrogen-ionic liquid gas-liquid separator is very important for the efficient and stable operation of the ionic liquid hydrogen compressor system, thereby playing a very important role in the field of hydrogen energy storage and transportation.
For gas-liquid two-phase mixtures in compressor systems, it is common to use a cyclone as its coarse separation device. The cyclone separator has the advantages of small volume and high efficiency, so the cyclone separator can also be applied to an ionic liquid hydrogen compressor system as primary separation equipment. The cyclone separator mainly comprises a mixed gas inlet pipe, a cyclone outer cylinder, a cyclone inner cylinder, a top exhaust pipe and a bottom liquid discharge pipe. Patent document CN111365210B proposes an efficient pressurization zero-clearance ionic liquid compressor with an accurately adjustable piston stroke, which includes a gas-liquid separation mechanism, and uses a magnetostrictive displacement sensor to measure the piston displacement in a hydraulic cylinder, so as to realize accurate control of the piston stroke. The system comprises a gas-liquid separator, but the specific form of the separator is not involved, so that the separation efficiency in practical application is difficult to ensure.
As the density of the hydrogen is lower than that of media such as air compressed conventionally, and the viscosity of the ionic liquid is higher than that of the traditional lubricating oil, the ionic liquid is easy to adhere to the inner wall surface of the separator in a sheet manner, and when the liquid film is accumulated to be thicker, a large amount of secondary small droplets are splashed from the liquid film to enter the gas phase field under the rubbing and entrainment action of the rotating airflow.
Disclosure of Invention
The invention aims to solve the problem of splashing of a wall surface liquid film in a traditional cyclone gas-liquid separator, and provides a cyclone separator suitable for an ionic liquid hydrogen compressor and a working method thereof.
The technical scheme adopted by the invention is as follows:
the cyclone separator suitable for the ionic liquid hydrogen compressor comprises a cyclone separator body, wherein a plurality of super-hydrophilic ionic liquid coatings which are obliquely arranged are arranged on the inner wall surface of a cylindrical cyclone outer cylinder of the cyclone separator body, the patterns of the super-hydrophilic ionic liquid coatings are in a vein shape, the super-hydrophilic ionic liquid coatings which are obliquely arranged are uniformly distributed at intervals in the circumferential direction of the inner wall surface of the cylindrical cyclone outer cylinder, and other areas of the inner wall surface of the cylindrical cyclone outer cylinder are provided with super-hydrophobic ionic liquid coatings.
Preferably, the super-hydrophilic ionic liquid coating is arranged on the inner wall surface of the cylindrical cyclone outer cylinder in the following mode: the cylindrical cyclone outer barrel rotates and descends in a mode of following the liquid film in the cylindrical cyclone outer barrel, namely, the main part of the texture is not vertical to the bottom of the barrel body, but inclines along the moving direction of the flow field.
Preferably, the vein texture of the super-ionophilic liquid coating slopes in the cyclone barrel in a direction away from the inlet along the direction of movement of the gas-liquid two-phase mixture in the cylindrical cyclone outer barrel.
Preferably, the upper end of the super-hydrophilic ionic liquid coating is positioned below the gas-liquid mixture inlet of the cyclone separator body and in the area between the cylindrical cyclone inner cylinder and the cylindrical cyclone outer cylinder of the cyclone separator body, and the lower end of the super-hydrophilic ionic liquid coating extends to the bottom of the cylindrical cyclone outer cylinder.
Preferably, the graph of the super-hydrophilic ionic liquid coating comprises a main part and branch parts which are arranged on two sides of the main part in a staggered mode along the height direction of the main part, and the main part inclines along the direction of a flow field in the cylindrical cyclone outer cylinder.
Preferably, the trunk part is thin to thick from top to bottom, and the branches are thin at the top and thick at the bottom.
Preferably, the branch is gradually longer from top to bottom.
Preferably, the inclination angle of the main axis relative to the axis of the cylindrical cyclone outer cylinder is 45-70 degrees, and the inclination angle of the branch axis relative to the main axis is 45 +/-5 degrees.
Preferably, in the cyclone separator body, an upper cylinder cover and a lower cylinder cover are respectively arranged at the upper end and the lower end of the cylindrical cyclone outer cylinder, a top exhaust pipe and a bottom liquid discharge pipe are respectively coaxially arranged at the respective central positions of the upper cylinder cover and the lower cylinder cover, a cylindrical cyclone inner cylinder is coaxially connected to the bottom of the cyclone upper cylinder cover, the cylindrical cyclone inner cylinder is coaxial with the cyclone upper cylinder cover and the top exhaust pipe, a gas-liquid mixture inlet is tangentially connected to the cylindrical cyclone outer cylinder, and the gas-liquid mixture inlet is communicated with the upper part of an annular cavity formed by the cylindrical cyclone outer cylinder and the cylindrical cyclone inner cylinder.
The working method of the cyclone separator suitable for the ionic liquid hydrogen compressor comprises the following steps:
the hydrogen-ionic liquid two-phase mixture tangentially enters an annular cavity formed by the cylindrical cyclone outer cylinder and the cylindrical cyclone inner cylinder along a gas-liquid mixture inlet of the cyclone separator body and rotates, ionic liquid drops move on the radial outer side of a rotating flow field in the rotating motion process, and hydrogen moves on the radial inner side of the rotating flow field;
when the ionic liquid drops impact the super-hydrophilic ionic liquid coating on the inner wall surface of the cylindrical cyclone outer cylinder, the ionic liquid drops are adhered to the surface of the super-hydrophilic ionic liquid coating and spread out, and are gathered in the area of the super-hydrophilic ionic liquid coating;
when the ionic liquid drops impact the super-hydrophobic ionic liquid coating on the inner wall surface of the cylindrical cyclone outer cylinder, the ionic liquid drops shrink into beads, and the ionic liquid on the surface of the super-hydrophobic ionic liquid coating moves to the region of the super-hydrophilic ionic liquid coating and gathers after mutual contact and movement;
the ionic liquid gathered to the super-hydrophilic ionic liquid coating finally moves to the bottom of the cylindrical cyclone outer cylinder along the vein structure and flows away, and separation of ionic liquid drops and hydrogen is completed.
The invention has the following beneficial effects:
compared with the prior art, the invention has the following beneficial effects:
the invention provides a cyclone separator suitable for an ionic liquid hydrogen compressor, wherein a vein-shaped super-hydrophilic ionic liquid coating of super-hydrophilic ionic liquid is arranged on the inner wall surface of a cylindrical cyclone outer cylinder, and super-hydrophobic ionic liquid coatings are arranged in other areas of the inner wall surface of the cylindrical cyclone outer cylinder, so that when an ionic liquid drop group reaches the inner wall surface of the cylindrical cyclone outer cylinder, the ionic liquid drops are gathered on the vein branches under the driving of an infiltration gradient force and are gradually and efficiently guided along the vein, a flaky liquid film is not easily formed on the inner wall surface of the cyclone cylinder, entrainment splashing of the liquid film is effectively reduced, and the efficiency of the separator is greatly improved, so that the separator has the characteristic of high separation efficiency. Meanwhile, the coating is arranged on the inner wall surface, so that the direct contact between the hydrogen and the wall surface of the separator cylinder can be effectively blocked, the hydrogen embrittlement phenomenon is not easy to occur, the service life of the separator is prolonged, the separator cannot easily lose efficacy, and finally the replacement and installation cost of the separator is greatly reduced. The cyclone separator applicable to the ionic liquid hydrogen compressor has high efficiency, so that the recovery efficiency of the ionic liquid is greatly improved, the replacement period of the fine separation filter element at the rear end is prolonged, and the operation and maintenance cost of the ionic liquid hydrogen compressor system can be effectively reduced. From the analysis, the cyclone separator suitable for the ionic liquid hydrogen compressor based on the invention can realize rectification of the liquid film on the wall surface, accelerate the liquid guiding speed, ensure that more wall surface areas are difficult to deposit the liquid film, effectively reduce the possibility that ionic liquid drops impact the liquid film to splash, and effectively prevent the direct contact of hydrogen and the wall surface of the separator, thereby being a high-efficiency and reliable primary separator suitable for the ionic liquid hydrogen compressor system.
Drawings
Fig. 1 is a structural view of an external appearance of a cyclone separator suitable for an ionic liquid hydrogen compressor according to the present invention.
FIG. 2 is a cross-sectional view 1/2 of a cyclone separator suitable for use in an ionic liquid hydrogen compressor, shown facing away from the inlet.
FIG. 3 is a cross-sectional view 1/4 of a cyclone separator suitable for use in an ionic liquid hydrogen compressor in accordance with the invention, taken across the inlet.
In the figure: 1-cylindrical cyclone outer cylinder, 2-cylinder upper cover, 3-cylinder bottom cover, 1-1-gas-liquid mixture inlet, 1-2-super-hydrophilic ionic liquid coating, 1-3-super-hydrophobic ionic liquid coating, 2-1-cylindrical cyclone inner cylinder, 2-2-top exhaust pipe and 3-1-bottom liquid discharge pipe.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.
The ionic liquid compressor is a new technology in a hydrogen filling station at present, and the compressor adopts the ionic liquid to replace a metal piston to reciprocate under the pushing of hydraulic oil, so that hydrogen in a compression cavity forms high pressure, and the compressor can be in service for a long time without maintenance, thereby saving 20% of energy consumption. However, in the moving process of the liquid piston, due to the reciprocating oscillation effect, part of small droplets are sucked and mixed into hydrogen, so that the purity of the hydrogen at the exhaust end is greatly influenced, and the performance of the fuel cell vehicle is possibly influenced. The invention designs the high-efficiency and reliable primary separator of the hydrogen-ionic liquid so as to improve the purity of the hydrogen at the exhaust end and the recovery efficiency of the ionic liquid.
As the hydrogen-ionic liquid mixed fluid is attached to and converged on the wall surface of the cylinder body of the cylindrical cyclone outer cylinder to form a flaky liquid film in the moving process of the cyclone separator, and the liquid film rotates downwards in a strand shape. If the liquid film on the wall surface of the separator is rectified and dredged, the liquid discharge capacity of the liquid film on the wall surface can be accelerated, the escape of the liquid film is reduced, and the efficiency of the separator is fundamentally improved. The technical scheme adopted by the invention is mainly to collapse the liquid film, and when the liquid film is collapsed, on one hand, reasonable veins are needed to be adopted to regulate the liquid film, and on the other hand, the designed diversion structure needs to conform to the flowing form of the liquid film on the wall surface of the cylinder body. As a pressure vessel, a separator is generally cast from a metal material, and since "hydrogen embrittlement" occurs when it is in contact with hydrogen gas for a long time, it is necessary to provide a certain barrier on the inner wall surface of the separator by some means to prolong the service life of the apparatus.
According to the above experimental background, as shown in fig. 1, 2 and 3, the cyclone separator of the invention is suitable for the ionic liquid hydrogen compressor, and comprises a cylindrical cyclone outer cylinder 1, a cylinder upper cover 2 and a cylinder bottom cover 3; the inner wall surface of the cylindrical cyclone outer cylinder 1 is sprayed with a super-hydrophilic ionic liquid coating 1-2 and a super-hydrophobic ionic liquid coating 1-3. The texture of the area 1-2 of the super-hydrophilic ionic liquid coating is of a vein type, namely, the middle of the area is a main trunk from top to bottom, branches are arranged on two sides of the main trunk in a staggered mode, the tops of the branches are thin, the bottoms of the branches are thick, the branches are finally converged on the main trunk, the lengths of the branches are gradually lengthened from top to bottom, the vein texture rotates and descends in a manner of following the flowing mode of a liquid film in the cylinder, and specifically, the vein texture slightly inclines in the cyclone cylinder towards the direction far away from the inlet along the moving direction of a gas-liquid two-phase mixture. Wherein, the inclination angle of the main axis relative to the axis of the cylindrical cyclone outer cylinder 1 is 45-70 degrees, and the inclination angle of the branch axis relative to the main axis is 45 +/-5 degrees. The area of the inner wall surface of the cylindrical cyclone outer cylinder 1 except the super-hydrophilic ionic liquid coating 1-2 is set as a super-hydrophobic ionic liquid coating 1-3. A cylindrical cyclone inner barrel 2-1 is welded below the cyclone barrel upper cover 2, and the cyclone inner barrel 2-1 and the cylindrical cyclone outer barrel 1 are coaxially arranged to form an annular space. A top exhaust pipe 2-2 is welded above the cylinder upper cover 2, and the top exhaust pipe 2-2 and the cylindrical cyclone outer cylinder 1 are coaxially arranged. A bottom liquid discharge pipe 3-1 is welded below the bottom cover 3 of the cylinder body, and the bottom liquid discharge pipe 3-1 and the cylindrical cyclone outer cylinder 1 are coaxially arranged. A gas-liquid mixture inlet 1-1 is tangentially welded on the outer portion of the cylindrical cyclone outer cylinder 1, and the gas-liquid mixture inlet 1-1 is communicated with the upper portion of an annular cavity formed by the cylindrical cyclone outer cylinder 1 and the cylindrical cyclone inner cylinder 2-1. The cyclone outer barrel is vertically placed, the barrel upper cover 2 is connected with the cylindrical cyclone outer barrel 1 through a flange, and the barrel bottom cover 3 is connected with the cylindrical cyclone outer barrel 1 through a flange. According to the invention, through the characteristics of super-hydrophilic or super-hydrophobic ionic liquid, a special vein-shaped liquid guide channel is formed, the rectification of the liquid film on the wall surface is realized by virtue of the action of surface gradient force, the liquid film flow guide is accelerated, and the flaky liquid film is difficult to deposit on the inner wall surface of the separator, so that the possibility of splashing of the liquid film caused by liquid drop impact is effectively reduced. And the coating effectively prevents the hydrogen from directly corroding the wall surface, thereby avoiding the hydrogen embrittlement phenomenon and prolonging the service life of the separator.
The process of ionic liquid-hydrogen separation by the cyclone gas-liquid separator of the invention is as follows:
in the operation process of the ionic liquid hydrogen compressor, a hydrogen-ionic liquid two-phase mixture at the exhaust end tangentially enters an annular cavity formed by the cylindrical cyclone outer cylinder 1 and the cylindrical cyclone inner cylinder 2-1 along the gas-liquid mixture inlet 1-1 and rotates. Because the inertia force of the ionic liquid drops is larger, the liquid drops move on the outer side of the radial direction of the rotating flow field, and the hydrogen in the gas-liquid two-phase mixture moves on the inner side of the radial direction of the rotating flow field.
When ion liquid drops impact the super-hydrophilic ionic liquid coating 1-2 on the inner wall surface of the cylindrical cyclone outer cylinder 1, the liquid drops are immediately adhered to the wall surface and spread out, and are gathered in the area;
when ion liquid drops impact the super-hydrophobic ion liquid coating 1-3 on the inner wall surface of the cylindrical cyclone outer cylinder 1, the liquid drops shrink into beads. Thereafter, the movement pattern of the droplets will be divided into several cases: if the contact area of the bottom and the wall surface is provided with the super-hydrophilic ionic liquid coating 1-2 contacted with the vein textures, the super-hydrophilic ionic liquid coating is quickly transferred into the vein type super-hydrophilic ionic liquid area 1-2 and spread out under the action of surface gradient force, is converged with other ionic liquid in the area, and then is guided along the vein configuration; if the contact area of the bottom of the liquid bead and the wall surface does not reach the super-hydrophilic ionic liquid coating 1-2 and the constraint of the contact force with the wall surface can be released under the action of gravity, the liquid bead directly slides downwards along the wall surface until the liquid bead reaches the super-hydrophilic ionic liquid coating 1-2, and then the liquid bead continues to be converged and guided along the vein texture; if the contact area of the bottom of the liquid bead and the wall surface does not reach the super-hydrophilic ionic liquid coating 1-2 and cannot break loose from the constraint of the wall surface force under the action of gravity, the liquid bead stays in place to wait for the subsequent coming ionic liquid; when the subsequent arriving ion droplets and the liquid beads are polymerized to form larger ion droplets, the further behaviors of the subsequent arriving ion droplets and the liquid beads are judged according to whether the subsequent arriving ion droplets can break loose the constraint of the surface force of the wall surface and whether the contact area with the wall surface touches the vein flow guide area, namely, the subsequent arriving ion droplets enter the vein area and directly slide down along the wall surface, and stay on the wall surface in the form of larger liquid beads to wait for the subsequent arriving ion droplets until finally moving to the bottom of the cylindrical cyclone outer cylinder 1.
After the ionic liquid drops on the wall surface move to the bottom of the cylindrical cyclone outer cylinder 1, the ionic liquid drops flow away from a liquid discharge pipe 3-1 at the bottom, so that the separation of the ionic liquid drops and the hydrogen can be completed.
The hydrogen moves in the middle of the cylindrical cyclone outer cylinder 1 and is finally discharged upwards along the top exhaust pipe 2-2 on the cylinder upper cover 2.
In conclusion, the cyclone gas-liquid separator is a high-efficiency gas-liquid separator suitable for realizing primary separation in an ionic liquid hydrogen compressor system, skillfully combines the flowing form of a liquid film on a cylindrical wall surface, utilizes specially designed veins of blades rotating downwards to guide the flow of the liquid film, and can avoid the technical problem that the separation efficiency is influenced by the escape of the liquid film on the wall surface in the conventional cyclone gas-liquid separator. The invention generates vein-type super-hydrophilic-super-hydrophobic ionic liquid characteristic textures on the inner wall surface of the outer cylinder of the traditional cyclone gas-liquid separator by a chemical etching or direct spraying method, and regulates and controls the liquid film on the wall surface of the separator by utilizing the action of the wall surface gradient force. The ion liquid drops are gathered into the vein-shaped stripe-shaped texture, so that the formation of liquid film flakes on the inner wall surface of the separator is avoided, the rectification of the liquid film on the wall surface is realized, and the liquid guiding speed is improved. The application of the coating can also avoid the hydrogen from directly contacting the inner wall surface of the container, effectively reduce the hydrogen embrittlement phenomenon, and prolong the service life of the separator.

Claims (10)

1. The cyclone separator is suitable for an ionic liquid hydrogen compressor and is characterized by comprising a cyclone separator body, wherein a plurality of obliquely arranged super-hydrophilic ionic liquid coatings (1-2) are arranged on the inner wall surface of a cylindrical cyclone outer cylinder (1) of the cyclone separator body, the patterns of the super-hydrophilic ionic liquid coatings (1-2) are in a vein shape, the plurality of obliquely arranged super-hydrophilic ionic liquid coatings (1-2) are uniformly distributed at intervals in the circumferential direction of the inner wall surface of the cylindrical cyclone outer cylinder (1), and the super-hydrophobic ionic liquid coatings (1-3) are arranged in other areas of the inner wall surface of the cylindrical cyclone outer cylinder (1).
2. The cyclone-type separator suitable for an ionic liquid hydrogen compressor according to claim 1, wherein the super-hydrophilic ionic liquid coating (1-2) is provided on the inner wall surface of the cylindrical cyclone outer cylinder (1) in the form of: the cyclone cylinder rotates and moves downwards in a way of following the flowing of a liquid film in the cylindrical cyclone outer cylinder (1).
3. Cyclone separator suitable for use in ionic liquid hydrogen compressors according to claim 1 characterized in that the vein texture of the super-hydrophilic ionic liquid coating (1-2) slopes in the cyclone cylinder in the direction away from the inlet along the direction of movement of the gas-liquid two-phase mixture in the cylindrical cyclone outer cylinder (1).
4. The cyclone separator adapted to an ionic liquid hydrogen compressor according to claim 1, wherein the upper end of the super-hydrophilic ionic liquid coating (1-2) is located below the gas-liquid mixture inlet (1-1) of the cyclone separator body and in the region between the cylindrical cyclone inner cylinder (2-1) and the cylindrical cyclone outer cylinder (1) of the cyclone separator body, and the lower end of the super-hydrophilic ionic liquid coating (1-2) extends to the bottom of the cylindrical cyclone outer cylinder (1).
5. The cyclone separator adapted for an ionic liquid hydrogen compressor according to any one of claims 1 to 4, wherein the pattern of the super-hydrophilic ionic liquid coating (1-2) comprises a trunk portion and branch portions staggered on both sides of the trunk portion along the height direction of the trunk portion, and the trunk portion is inclined in accordance with the direction of the flow field in the cylindrical cyclone outer cylinder (1).
6. A cyclone separator according to claim 5, wherein the main portion is thin to thick from top to bottom, and the branches are thin at the top and thick at the bottom.
7. A cyclone-type separator adapted for use in an ionic liquid hydrogen compressor according to claim 6, wherein the branch is gradually longer from top to bottom.
8. A cyclone separator adapted for an ionic liquid hydrogen compressor according to claim 5, wherein the inclination angle of the main axis with respect to the axis of the cylindrical cyclone outer cylinder (1) is 45 ° to 70 °, and the inclination angle of the branch axis with respect to the main axis is 45 ° ± 5 °.
9. The cyclone separator applicable to the ionic liquid hydrogen compressor according to claim 1, wherein in the cyclone separator body, the upper end and the lower end of the cylindrical cyclone outer cylinder (1) are respectively provided with the cylinder upper cover (2) and the cylinder bottom cover (3), the cylinder upper cover (2) and the cylinder bottom cover (3) are respectively and coaxially provided with the top exhaust pipe (2-2) and the bottom discharge pipe (3-1) at respective central positions, the bottom of the cyclone cylinder upper cover (2) is coaxially connected with the cylindrical cyclone inner cylinder (2-1), the cylindrical cyclone inner cylinder (2-1) is coaxial with the cyclone cylinder upper cover (2) and the top exhaust pipe (2-2), the cylindrical cyclone outer cylinder (1) is tangentially connected with a gas-liquid mixture inlet (1-1), and the gas-liquid mixture inlet (1-1) is coaxial with an annular ring formed by the cylindrical cyclone outer cylinder (1) and the cylindrical cyclone inner cylinder (2-1) The upper parts of the cavities are communicated.
10. The method of operating a cyclone separator adapted for use in an ionic liquid hydrogen compressor according to any one of claims 1 to 9, comprising the steps of:
the hydrogen-ionic liquid two-phase mixture tangentially enters an annular cavity formed by the cylindrical cyclone outer cylinder (1) and the cylindrical cyclone inner cylinder (2-1) along a gas-liquid mixture inlet (1-1) of the cyclone separator body and rotates, in the process of rotating, ionic liquid drops move on the radial outer side of a rotating flow field, and hydrogen moves on the radial inner side of the rotating flow field;
when ion liquid drops impact the super-hydrophilic ionic liquid coating (1-2) on the inner wall surface of the cylindrical cyclone outer cylinder (1), the ion liquid drops are adhered to the surface of the super-hydrophilic ionic liquid coating (1-2) and spread out, and are gathered in the area of the super-hydrophilic ionic liquid coating (1-2);
when ion liquid drops impact the super-hydrophobic ion liquid coating (1-3) on the inner wall surface of the cylindrical cyclone outer cylinder (1), the ion liquid drops shrink into beads, and the ion liquid on the surface of the super-hydrophobic ion liquid coating (1-3) moves to the area of the super-hydrophilic ion liquid coating (1-2) after being contacted with each other and moved and gathers;
the ionic liquid gathered to the super-hydrophilic ionic liquid coating (1-2) finally moves to the bottom of the cylindrical cyclone outer cylinder (1) along the vein structure and flows away, and separation of ionic liquid drops and hydrogen is completed.
CN202210680890.XA 2022-06-16 2022-06-16 Cyclone separator suitable for ionic liquid hydrogen compressor and working method thereof Active CN115030883B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
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