CN109921062B - Gas-liquid separator for fuel cell - Google Patents
Gas-liquid separator for fuel cell Download PDFInfo
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- CN109921062B CN109921062B CN201711325748.9A CN201711325748A CN109921062B CN 109921062 B CN109921062 B CN 109921062B CN 201711325748 A CN201711325748 A CN 201711325748A CN 109921062 B CN109921062 B CN 109921062B
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- 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
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Abstract
The invention relates to a small-sized gas-liquid separator for a fuel cell, which has a centrifugal separation principle that water drops do circular motion in a mosquito coil pipe to generate a settling acceleration which is 400 times larger than that of the gravity settling principle, and has a good gas-liquid separation effect. The gas-liquid mixed medium cooling gas passes through the snake-shaped cavity and impacts the wall surface at the turn-back position of the snake-shaped channel, so that effective deposition is realized, and the water recovery efficiency is improved.
Description
Technical Field
The invention belongs to the innovative technology of fuel cell components. In particular to an innovative technology of a gas-liquid separator of a methanol fuel cell.
Background
Currently, methanol fuel cells have many advantages such as high energy conversion efficiency, no pollution, and low noise, and become a new energy research hotspot. The methanol fuel cell has considerable market prospect because of the functions of being used for camping in the field, vehicle-mounted power supply, off-grid power generation and the like.
Volume minimization is always the goal of fuel cell system optimization, and in addition to efficient space utilization, miniaturization of system internal components is the fundamental solution to the "slimming" of mobile fuel cells. At present, the gas-liquid separator of the methanol fuel cell with the size of more than hundred watts is large because the gas-liquid separator depends on the gravity separation principle and needs longer liquid drop settling distance. The gas-liquid separator is an indispensable important component for water management of the methanol fuel cell, but the gas-liquid separator relying on the gravity separation principle has limited potential for volume optimization, and further volume compression of the methanol fuel cell mobile power station is prevented.
The gas-liquid separator based on the gravity separation principle has two functions of gas-liquid separation and water recovery, the gas-liquid separator is decomposed to form two parts, the centrifugal gas-liquid separation principle is adopted at the front end, the space is reduced and the gas-liquid separation function is enhanced compared with the gas-liquid separator based on the gravity separation principle, the gas-liquid separator and the rear end water recovery part form a whole, the system integration volume is reduced, and the bottleneck of the volume ratio power of the system is broken through. The heating base is arranged at the bottom end of the water recovery box, so that the function of quickly starting the fuel cell is realized.
Disclosure of Invention
The invention aims to provide a small-sized gas-liquid separator for a methanol fuel cell, which has small volume and good gas-liquid separation effect; the water recycling device is arranged on a proton exchange membrane fuel cell, can effectively recycle water, and improves the water management capability of the fuel cell.
The invention is realized by the following scheme. The main structure of the separator takes polyetherimide or other methanol corrosion resistant engineering plastics as raw materials, the production is realized by applying a carving technology and a bonding process, the upper layer of the water recovery box is a gas-liquid mixed medium cavity, and the inner wall is stuck with a polydimethylsiloxane film or other 80-degree high temperature resistant hydrophobic materials.
The structure of the invention is as follows:
a small-sized gas-liquid separator for a fuel cell comprises a water recovery box which is a closed cavity, a transverse clapboard is arranged in the water recovery box, the transverse clapboard divides the water recovery box into an upper closed cavity and a lower closed cavity respectively, the upper cavity is a gas-liquid mixed medium cavity, and the lower cavity is a solution cavity;
a gas-liquid mixed medium cavity inlet and a gas outlet are arranged on the side wall surface of the gas-liquid mixed medium cavity, and a vertical flat plate for increasing the length of a flow passage of the gas-liquid mixed medium from the inlet to the gas outlet is arranged between the gas-liquid mixed medium cavity inlet and the gas outlet;
the transverse partition plate is provided with a through hole which is used as a descending channel of the solution cavity;
a solution outlet is arranged on the solution cavity; the upper part of the solution cavity is communicated with the upper part of the gas-liquid mixed medium cavity through a pipeline.
The mosquito-repellent incense coil is characterized by also comprising a mosquito-repellent incense coil which is formed by circularly winding a circular pipe from inside to outside in the same plane according to a circle center, or spirally winding the circular pipe from bottom to top along an axis; the inlet of the gas-liquid mixed medium cavity is connected with the end opening of the circular pipe which is coiled into a circular ring shape and is close to the circle center or the lower end opening of the circular pipe which is coiled into a spiral shape.
The number of the vertical flat plates is more than 2, the upper end faces of the vertical flat plates are closely attached or connected with the upper wall face of the gas-liquid mixed medium cavity, the lower end faces of the vertical flat plates are closely attached or connected with the upper surface of the transverse partition plate, and one side end face of one vertical flat plate is closely attached or connected with the side wall face of the gas-liquid mixed medium cavity or one side surface of the other vertical flat plate, so that a labyrinth snake-shaped channel is formed.
The bottom of the solution cavity is provided with a heating base, and an electric heating element is arranged in the heating base.
1. The inlet of the mosquito coil pipe of the invention is connected with the outlet of the fuel cell radiator, the gas-liquid mixed medium rotates in the pipe channel of the mosquito coil pipe, the settling velocity of the water drops is
And the gravitational settling velocity is
Acceleration of settling of water droplets of
The gravity settling acceleration is g, the settling velocity of water drops in the mosquito coil is one order of magnitude greater than the gravity settling velocity, and the settling acceleration of water drops in the mosquito coil is two orders of magnitude greater than the gravity settling acceleration, so that the separation efficiency of the mosquito coil is higher, and the required settling space is smaller.
2. The outlet of the mosquito coil is connected with the inlet of a gas-liquid mixed medium cavity on the upper layer of the water recovery box at the rear end, the particle size of water drops entering the gas-liquid mixed medium cavity is larger, the water drops collide the turn-back part of the labyrinth snake-shaped channel and slide down to a downlink channel leading to the solution cavity along the wall surface, and the effective recovery of water is realized.
3. The upper layer of the water recovery box is formed by attaching a polydimethylsiloxane film or other 80-degree high-temperature-resistant hydrophobic materials to the inner wall of the gas-liquid mixed medium cavity, so that water drops can slide along the wall surface, and the water recovery efficiency is improved. The main structure of the separator takes polyetherimide or other methanol corrosion resistant engineering plastics as raw materials, and the durability and reliability of the water separator are guaranteed.
4. The methanol solution at the anode outlet of the galvanic pile is introduced into the lower solution cavity, the inlet direction is parallel to the plane of the solution cavity, the impact on the solution liquid level is avoided, and the outlet pipeline is arranged to extend to the position below the lowest liquid level to suck out the solution.
5. The height of the gas-liquid mixed medium cavity is not too low, otherwise, the cross section area is too small, so that the gas flow speed is too high, and the liquid drop sedimentation is not facilitated; the height of the methanol solution cavity is not too low, otherwise, the methanol solution is easy to overflow to the gas-liquid mixing medium cavity due to the fluctuation of the air pressure of the methanol solution cavity.
6. The gas-liquid mixing medium cavity and the solution cavity are provided with gas pressure communication interfaces for pressure balance. The solution overflows into the gas-liquid mixed medium cavity due to the unbalanced pressure of the gas-liquid mixed medium cavity and the solution cavity.
7. Set up the heating base in water recovery box bottom for heating methanol solution, the heating function uses when fuel cell starts, has realized the quick start-up function of fuel cell.
The invention has the following beneficial effects:
1. the separation effect of the invention is verified by simulation analysis of a computational fluid dynamics method, water drops do circular motion in the mosquito coil pipe, the sedimentation acceleration which is 400 times larger than the gravity sedimentation principle is generated, the simulation result is shown in figure 4, liquid water flows in the outer diameter area of the pipeline under the action of centrifugal force, and the gas-liquid separation effect is good.
2. The motion state of the gas-liquid mixed medium of the water recovery box is verified by simulation analysis of a computational fluid dynamics method, as shown in figure 5, the gas-liquid mixed medium cooling gas passes through the serpentine chamber and impacts the wall surface at the turn-back position of the serpentine channel, the speed is reduced, water drops enter the downlink channel along the wall surface, the retention time of the water drops in the water recovery box is prolonged, and the water recovery efficiency is improved.
3. The heating base is arranged at the bottom end of the water recovery box, so that the quick starting function of the fuel cell is realized, and the starting process of the fuel cell is completed within 10 minutes after the test.
Drawings
FIG. 1 is an overall view of a water separator
FIG. 2 is a side sectional view of the water separator
FIG. 3 is a top sectional view of the gas-liquid mixed medium chamber of the water separator
FIG. 4 is a liquid phase distribution diagram in a mosquito coil
FIG. 5 is a velocity distribution diagram of a gas-liquid mixed medium cavity
The reference numerals in figures 1, 2 and 3 are: 1. a mosquito coil; 2. a water recovery box; 3. a gas-liquid mixed medium cavity; 4. a solution chamber; 5. a labyrinth serpentine channel; 6. a down channel of the solution chamber; 7. an inlet of the gas-liquid mixed medium cavity; 8. the base is heated.
Detailed Description
Examples
1. The main structure of the separator takes polyetherimide as a raw material, the polyetherimide is finished by applying a carving technology and a bonding process, the upper layer of the water recovery box is a gas-liquid mixed medium cavity, the inner wall of the cavity is pasted with a polydimethylsiloxane film, and the bottom end of the water recovery box is made of a stainless steel 316L material for heating a base.
2. The separator is divided into two parts, wherein a gas-liquid mixed medium passes through a channel of the centrifugal mosquito-repellent incense coil (1) at the front end and passes through a water recovery box (2) at the rear end; the outermost ring extension opening of the mosquito-repellent incense coil (1) is an inlet and is connected with an outlet of a fuel cell radiator, the innermost ring extension opening is an outlet and is connected with an inlet of a water recovery box (2) at the rear end, the pipe diameter is set to be 5mm, and the circumference is 5; the water recovery box (2) is divided into an upper layer chamber and a lower layer chamber, the upper layer is a gas-liquid mixed medium chamber (3), and the lower layer is a solution chamber (4); the gas-liquid mixed medium cavity is provided with a labyrinth type serpentine channel (5), 4 partition plates are arranged, a downward channel (6) leading into the solution cavity is arranged at the turn-back position of the serpentine channel, and the direction of an inlet (7) of the gas-liquid mixed medium cavity is parallel to the plane of the gas-liquid mixed medium cavity (3); the methanol solution at the anode outlet of the galvanic pile is introduced into a lower solution cavity (4), the inlet direction of the solution cavity is parallel to the plane of the solution cavity (4), the outlet direction of the solution cavity is vertical to the plane of the solution cavity, an outlet pipeline is arranged, and the solution is sucked out at a low liquid level; the gas-liquid mixing medium cavity (3) and the solution cavity (4) are provided with a gas pressure communicating interface for balancing pressure. Set up heating base (8) in water recovery box bottom, the stainless steel 316L preparation is used to the base, sets up 5 pipelines for the heating rod.
Claims (3)
1. A gas-liquid separator for a fuel cell, characterized in that: the device comprises a water recovery box which is a closed cavity, wherein a transverse partition plate is arranged in the water recovery box and divides the water recovery box into an upper closed cavity and a lower closed cavity respectively;
a gas-liquid mixed medium cavity inlet and a gas outlet are arranged on the side wall surface of the gas-liquid mixed medium cavity, and a vertical flat plate for increasing the length of a flow passage of the gas-liquid mixed medium from the inlet to the gas outlet is arranged between the gas-liquid mixed medium cavity inlet and the gas outlet;
the transverse partition plate is provided with a through hole which is used as a descending channel of the solution cavity;
a solution outlet is arranged on the solution cavity; the upper part of the solution cavity is communicated with the upper part of the gas-liquid mixed medium cavity through a pipeline;
the mosquito-repellent incense coil is characterized by also comprising a mosquito-repellent incense coil which is formed by circularly winding a circular pipe from inside to outside in the same plane according to a circle center, or spirally winding the circular pipe from bottom to top along an axis; the inlet of the gas-liquid mixed medium cavity is connected with the end opening of the circular pipe which is coiled into a circular ring shape and is close to the circle center or the lower end opening of the circular pipe which is coiled into a spiral shape.
2. The gas-liquid separator according to claim 1, wherein: the number of the vertical flat plates is more than 2, the upper end face of each vertical flat plate is closely attached or connected with the upper wall face of the gas-liquid mixed medium cavity, the lower end face of each vertical flat plate is closely attached or connected with the upper surface of the transverse partition plate, and one side end face of each vertical flat plate is closely attached or connected with the side wall face of the gas-liquid mixed medium cavity or one side surface of the other vertical flat plate, so that a labyrinth snake-shaped channel is formed.
3. The gas-liquid separator according to claim 1, wherein: the bottom of the solution cavity is provided with a heating base, and an electric heating element is arranged in the heating base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711325748.9A CN109921062B (en) | 2017-12-13 | 2017-12-13 | Gas-liquid separator for fuel cell |
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| CN201711325748.9A CN109921062B (en) | 2017-12-13 | 2017-12-13 | Gas-liquid separator for fuel cell |
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| CN109921062A CN109921062A (en) | 2019-06-21 |
| CN109921062B true CN109921062B (en) | 2021-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113161583B (en) * | 2021-03-30 | 2022-06-10 | 中通客车股份有限公司 | Method and system for evaluating performance of fuel cell steam-water separator |
| CN114497628B (en) * | 2022-01-25 | 2024-01-05 | 中山大洋电机股份有限公司 | Fuel cell system |
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| CN101997127A (en) * | 2009-08-21 | 2011-03-30 | 中国科学院大连化学物理研究所 | Gas-liquid separator used for directly liquid feeding fuel battery system |
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| CN103657313A (en) * | 2013-11-30 | 2014-03-26 | 成都科盛石油科技有限公司 | Gas-liquid separator |
| CN103894019A (en) * | 2012-12-26 | 2014-07-02 | 现代摩比斯株式会社 | Gas-liquid separation device used for fuel battery and fuel battery system |
| CN104667584A (en) * | 2015-02-12 | 2015-06-03 | 浙江大学 | Spiral type gas-liquid separator under micro-gravity based on porous material |
| DE102014016963A1 (en) * | 2014-11-18 | 2016-05-19 | Daimler Ag | Water separator in centrifugal design |
| CN105642453A (en) * | 2016-03-23 | 2016-06-08 | 北京航天动力研究所 | High-pressure high-flow microgravity centrifugal gas and liquid separation device |
| CN106898800A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of minitype radiator and fuel cell system with gas-liquid separating function |
| CN106898801A (en) * | 2015-12-18 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of gas-liquid separator for direct liquid feed fuel cell system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101063457B1 (en) * | 2008-10-15 | 2011-09-08 | 삼성전기주식회사 | Gas-liquid separator, hydrogen generator and fuel cell power generation system having the same |
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- 2017-12-13 CN CN201711325748.9A patent/CN109921062B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997127A (en) * | 2009-08-21 | 2011-03-30 | 中国科学院大连化学物理研究所 | Gas-liquid separator used for directly liquid feeding fuel battery system |
| CN103240188A (en) * | 2012-02-13 | 2013-08-14 | 巴莱诺斯清洁能源控股公司 | Inertial separator for gas liquid separation |
| CN103894019A (en) * | 2012-12-26 | 2014-07-02 | 现代摩比斯株式会社 | Gas-liquid separation device used for fuel battery and fuel battery system |
| CN103657313A (en) * | 2013-11-30 | 2014-03-26 | 成都科盛石油科技有限公司 | Gas-liquid separator |
| DE102014016963A1 (en) * | 2014-11-18 | 2016-05-19 | Daimler Ag | Water separator in centrifugal design |
| CN104667584A (en) * | 2015-02-12 | 2015-06-03 | 浙江大学 | Spiral type gas-liquid separator under micro-gravity based on porous material |
| CN106898801A (en) * | 2015-12-18 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of gas-liquid separator for direct liquid feed fuel cell system |
| CN106898800A (en) * | 2015-12-21 | 2017-06-27 | 中国科学院大连化学物理研究所 | A kind of minitype radiator and fuel cell system with gas-liquid separating function |
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