CN116571012A - Gas-water separation device - Google Patents
Gas-water separation device Download PDFInfo
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- CN116571012A CN116571012A CN202310390518.XA CN202310390518A CN116571012A CN 116571012 A CN116571012 A CN 116571012A CN 202310390518 A CN202310390518 A CN 202310390518A CN 116571012 A CN116571012 A CN 116571012A
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- 238000000926 separation method Methods 0.000 title claims abstract description 116
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 86
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000007788 liquid Substances 0.000 claims abstract description 101
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 57
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 35
- 239000002808 molecular sieve Substances 0.000 claims description 33
- 230000018044 dehydration Effects 0.000 claims description 29
- 238000006297 dehydration reaction Methods 0.000 claims description 29
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 65
- 239000001257 hydrogen Substances 0.000 abstract description 28
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 25
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 8
- 230000002349 favourable effect Effects 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Electrochemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Cyclones (AREA)
Abstract
The application discloses a gas-water separation device, which comprises a shell, wherein a liquid separation cavity is formed in the shell, an air inlet pipe communicated with the liquid separation cavity is fixedly arranged at one end of the shell along the width direction, a first exhaust pipe communicated with the liquid separation cavity is fixedly arranged at one end of the shell along the height direction, and a wind shield is fixedly arranged in the shell, positioned in the liquid separation cavity and corresponding to the first exhaust pipe; the first exhaust pipe is provided with a first reversing valve, two output ends of the first reversing valve are respectively connected with a second exhaust pipe and a third exhaust pipe, the shell is fixedly provided with two separation boxes, and the second exhaust pipe and the third exhaust pipe are respectively communicated with the corresponding separation boxes; the two separation boxes are respectively internally provided with a separation assembly for separating liquid water and nitrogen, and the lower end part of the shell is provided with a liquid discharge valve. The application is beneficial to reducing the probability of liquid water and nitrogen contained in the tail gas after separation, and is convenient for improving the separation effect of hydrogen.
Description
Technical Field
The application relates to the field of separation devices, in particular to a gas-water separation device.
Background
A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electric energy. The basic principle is that the reverse reaction of electrolyzed water supplies hydrogen and oxygen to the anode and the cathode respectively, and after hydrogen diffuses outwards through the anode and reacts with electrolyte, electrons are released and reach the cathode through an external load. In order to recycle the tail gas, the liquid water in the tail gas is required to be separated from the hydrogen and the nitrogen, and then the nitrogen and the hydrogen are separated through a membrane separation device, so that the recycling of the hydrogen is realized.
The related art can refer to Chinese patent publication No. CN111129552B to disclose a hydrogen fuel cell system and a circulating hydrogen integrated treatment device suitable for the same and a working method thereof, wherein the integrated treatment device comprises a shell, the inside of the shell is isolated into a gas-water liquid cavity, a hydrogen-rich cavity and a nitrogen-rich cavity, a tail gas inlet pipe is arranged on the shell, one end of the tail gas inlet pipe is positioned outside the shell, the other end of the tail gas inlet pipe extends to the gas-water liquid cavity, and the end of the tail gas inlet pipe is provided with a gas-water separation structure; a membrane separation filter element is arranged in the hydrogen-rich cavity, and two ends of the membrane separation filter element are respectively connected with the first partition board and the second partition board; the membrane separation filter core can enable hydrogen in the fluid to permeate into the hydrogen-rich cavity, and enable nitrogen in the fluid to enter the nitrogen-rich cavity; outlets are respectively arranged on the gas-water liquid cavity, the hydrogen-rich cavity and the nitrogen-rich cavity on the shell.
For the related art, when the liquid water is separated, the tail gas enters the gas-water liquid cavity through the tail gas inlet pipe to form a rotational flow, the liquid water is converged and discharged at the lower end part of the tail gas treatment device under the centrifugal action of the rotational flow of the tail gas, but part of the liquid water is scattered by the airflow and then enters the inner pipe, so that the liquid water still exists in the tail gas subjected to liquid water separation treatment, and the liquid water is easy to generate a liquid resistance phenomenon after contacting with the membrane separation filter element, so that the separation effect of hydrogen is poor.
Disclosure of Invention
In order to improve the separation effect on hydrogen, the application provides a gas-water separation device.
The application provides a gas-water separation device, which adopts the following technical scheme:
the gas-water separation device comprises a shell, wherein a liquid separation cavity is formed in the shell, an air inlet pipe communicated with the liquid separation cavity is fixedly arranged at one end of the shell in the width direction, a first exhaust pipe communicated with the liquid separation cavity is fixedly arranged at one end of the shell in the height direction, and a wind shield is fixedly arranged in the liquid separation cavity and corresponds to the first exhaust pipe; the first exhaust pipe is provided with a first reversing valve, two output ends of the first reversing valve are respectively connected with a second exhaust pipe and a third exhaust pipe, the shell is fixedly provided with two separation boxes, and the second exhaust pipe and the third exhaust pipe are respectively communicated with the corresponding separation boxes; the two separation boxes are respectively internally provided with a separation assembly for separating liquid water and nitrogen, and the lower end part of the shell is provided with a liquid discharge valve.
Through adopting above-mentioned technical scheme, the intake pipe lets in tail gas to dividing the liquid intracavity, and tail gas realizes the separation to liquid water in dividing the liquid intracavity, but tail gas will carry a small amount of liquid water and get into in the first blast pipe, and first switching-over valve makes second blast pipe and third blast pipe closed in turn, and then makes the separation subassembly in two separation boxes separate liquid water and nitrogen gas in the tail gas in turn, is favorable to reducing the probability that contains liquid water and nitrogen gas in the tail gas that accomplishes the separation, is convenient for promote the separation effect to hydrogen.
Optionally, the separation assembly comprises a denitrification box and a dehydration box, the dehydration box is arranged at the upper end part of the separation box, and a dehydration molecular sieve is arranged in the dehydration box; the nitrogen removal box is arranged at the lower end part of the separation box, a nitrogen molecular sieve is arranged in the nitrogen removal box, the lower end parts of the two separation boxes are respectively connected with a fourth exhaust pipe and a fifth exhaust pipe, the two separation boxes are connected with a sixth exhaust pipe and a seventh exhaust pipe, and the sixth exhaust pipe and the seventh exhaust pipe are communicated with the corresponding nitrogen removal box.
Through adopting above-mentioned technical scheme, tail gas passes through in second blast pipe or the third blast pipe gets into the separator box, and the tail gas is preceding dehydration molecular sieve contact in the dehydration box, and the liquid water in the tail gas can be adsorbed to the dehydration molecular sieve, and nitrogen gas and hydrogen's mixed gas will be through the nitrogen gas molecular sieve in dehydration box and the denitrification box offset, and hydrogen and nitrogen gas's mixed gas has certain pressure, makes nitrogen gas molecular sieve can adsorb nitrogen gas, is favorable to realizing the effect to nitrogen gas and liquid water separate.
Optionally, the intake pipe has set firmly the governing pipe, and sliding connection has two regulating plates in the governing pipe, and the case is worn to be equipped with by the intake pipe, and the case is along the both ends of length direction and corresponding regulating plate fixed connection, and the intake pipe is connected with the lower tip of governing pipe, and first blast pipe is connected with the upper end of governing pipe, is equipped with the adjusting part that adjusts the case position in the governing pipe.
Through adopting above-mentioned technical scheme, intake pipe and first blast pipe exist pressure differential, and adjusting component adjusts the position of case through the change of pressure differential, is favorable to realizing the effect of adjusting intake pipe flow.
Optionally, the adjusting component comprises a first corrugated pipe and a second corrugated pipe, the first corrugated pipe is communicated with the air inlet pipe, the second corrugated pipe is communicated with the first air outlet pipe, and the first corrugated pipe and the second corrugated pipe are respectively fixedly connected with the corresponding adjusting plates.
Through adopting above-mentioned technical scheme, when the pressure differential between intake pipe and the first blast pipe grow, first bellows extends, and the second bellows contracts, and then makes the case move up and makes the flow of intake pipe reduce, is convenient for realize the effect of adjusting the flow of intake pipe.
Optionally, a plurality of limit rods are fixedly arranged in the adjusting tube along the circumferential direction, the limit rods penetrate through the two adjusting plates and are in sliding connection with the adjusting plates, the outer walls of the first corrugated pipe and the second corrugated pipe are fixedly provided with a plurality of limiting rings which are in sliding connection with corresponding limiting rods.
Through adopting above-mentioned technical scheme, gag lever post and spacing ring cooperation are favorable to reducing the probability that first bellows and second bellows skew were buckled, are convenient for realize carrying out spacing effect to first bellows and second bellows.
Optionally, the first spiral plate of circumference fixedly connected with in the casing, first spiral plate is located divides the liquid intracavity, first spiral plate fixedly connected with baffle.
Through adopting above-mentioned technical scheme, tail gas entering divides will form the cyclone after the liquid chamber, and liquid water is inconsistent with shells inner wall under the centrifugal action of cyclone to it is inconsistent with first spiral plate gradually, and the baffle is favorable to reducing the probability that tail gas will liquid water be separated.
Optionally, the baffle lower extreme fixedly connected with drainage board.
Through adopting above-mentioned technical scheme, the drainage plate drains the liquid water that contradicts with the baffle, is favorable to promoting tail gas and liquid water's separation effect.
Optionally, the first blast pipe fixedly connected with breakwater, the breakwater is located divides the liquid intracavity.
Through adopting above-mentioned technical scheme, the breakwater is favorable to reducing the probability that rivers on the first blast pipe outer wall are flowed into first blast pipe, further promotes the separation effect to liquid water.
In summary, the application comprises at least one of the following beneficial technical effects:
1. the tail gas is introduced into the liquid separation cavity through the air inlet pipe, the tail gas separates liquid water in the liquid separation cavity, but the tail gas carries a small amount of liquid water to enter the first exhaust pipe, the first reversing valve enables the second exhaust pipe and the third exhaust pipe to be alternately closed, and further separation assemblies in the two separation boxes alternately separate the liquid water and nitrogen in the tail gas, so that the probability of the liquid water and the nitrogen in the tail gas after separation is reduced, and the separation effect of hydrogen is improved;
2. the tail gas enters the separation box through the second exhaust pipe or the third exhaust pipe, the tail gas is contacted with the dehydration molecular sieve in the dehydration box, the dehydration molecular sieve can absorb liquid water in the tail gas, the mixed gas of nitrogen and hydrogen is contacted with the nitrogen molecular sieve in the denitrification box through the dehydration box, and the mixed gas of hydrogen and nitrogen has certain pressure, so that the nitrogen molecular sieve can absorb nitrogen, and the separation effect of the nitrogen and the liquid water is realized;
3. the pressure difference exists between the air inlet pipe and the first air outlet pipe, and the adjusting component adjusts the position of the valve core through the change of the pressure difference, so that the effect of adjusting the flow of the air inlet pipe is realized.
Drawings
Fig. 1 is a schematic view of the overall structure of a gas-water separation device.
FIG. 2 is a schematic view for highlighting the position of the denitrification and dewatering boxes.
Fig. 3 is an enlarged schematic view of the portion a in fig. 1.
Fig. 4 is a schematic view for highlighting the positions of the sixth exhaust pipe and the seventh exhaust pipe.
Fig. 5 is intended to highlight the schematic view of the first bellows and the second bellows positions.
Fig. 6 is intended to highlight the position of the stop lever and stop collar.
Reference numerals illustrate: 1. a housing; 2. a separation box; 3. a separation assembly; 4. an adjusting tube; 5. an adjustment assembly; 11. a liquid separating cavity; 12. an air inlet pipe; 13. a first exhaust pipe; 14. a wind deflector; 15. a first reversing valve; 16. a second exhaust pipe; 17. a third exhaust pipe; 18. a liquid discharge valve; 21. a fourth exhaust pipe; 22. a fifth exhaust pipe; 23. a sixth exhaust pipe; 24. a seventh exhaust pipe; 31. a denitrification box; 32. a dehydration box; 41. an adjusting plate; 42. a valve core; 43. a limit rod; 44. a limiting ring; 51. a first bellows; 52. a second bellows; 111. a first spiral plate; 112. a baffle; 113. a drainage plate; 131. and a water baffle.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a gas-water separation device.
Referring to fig. 1 and 2, a gas-water separation device comprises a casing 1, a liquid separation cavity 11 is formed in the casing 1, an air inlet pipe 12 communicated with the liquid separation cavity 11 is fixedly arranged at one end of the casing 1 along the width direction, and tail gas is conveyed into the liquid separation cavity 11 through the air inlet pipe 12. The tail gas will collide with the inner wall of the shell 1 after entering the liquid separating cavity 11, and the tail gas forms a descending cyclone, and the liquid water gradually gathers and collides with the inner wall of the shell 1 under the centrifugal action of the cyclone.
Referring to fig. 2 and 3, a first spiral plate 111 is fixedly connected in the housing 1 along the circumferential direction, the first spiral plate 111 is located in the liquid separation cavity 11, liquid water is abutted against the first spiral plate 111 under the driving of a cyclone after being abutted against the inner wall of the housing 1, and a baffle 112 is fixedly connected to the first spiral plate 111. The baffle 112 blocks the liquid water, so that the probability that the liquid water colliding with the first spiral plate 111 is taken away by the cyclone can be reduced. The baffle 112 lower tip fixedly connected with drainage board 113, the drainage board 113 can drain the liquid water that contradicts with the baffle 112 outside, on draining liquid water to first screw plate 111, further promotes tail gas and liquid water's separation effect.
Referring to fig. 1 and 2, the liquid water gradually moves downward under the cyclone effect and is accumulated at the lower end of the housing 1, so that a great part of the liquid water in the tail gas can be separated. The lower end of the shell 1 is provided with a drain valve 18, and the drain valve 18 can realize the drainage of liquid water. One end of the shell 1 along the height direction is fixedly provided with a first exhaust pipe 13 communicated with the liquid separation cavity 11, the shell 1 is fixedly provided with a wind shield 14, the wind shield 14 is positioned in the liquid separation cavity 11 and corresponds to the first exhaust pipe 13, and the wind shield 14 pulls tail gas so that the tail gas can be discharged through the first exhaust pipe 13.
Referring to fig. 1 and 2, the first exhaust pipe 13 is fixedly connected with a water baffle 131, the water baffle 131 is located in the liquid separating cavity 11, a large amount of liquid water is contained in the tail gas just entering the liquid separating cavity 11, the liquid Shui Yishun flows down along the upper end portion of the first exhaust pipe 13, the water baffle 131 can block the liquid water at the upper end portion of the first exhaust pipe 13, the probability that water on the outer wall of the first exhaust pipe 13 flows into the first exhaust pipe 13 is reduced, the water on the water baffle 131 is driven by air swirl and then collides with the inner wall of the liquid separating cavity 11, and the separation effect on the liquid water is further improved.
Referring to fig. 1 and 2, the first exhaust pipe 13 is provided with a first reversing valve 15, two output ends of the first reversing valve 15 are respectively connected with a second exhaust pipe 16 and a third exhaust pipe 17, the first reversing valve 15 enables the second exhaust pipe 16 to be communicated, and the third exhaust pipe 17 is closed. The shell 1 is fixedly provided with two separation boxes 2, the second exhaust pipe 16 and the third exhaust pipe 17 are respectively communicated with the corresponding separation boxes 2, and tail gas enters the separation boxes 2 through the second exhaust pipe 16.
Referring to fig. 1 and 2, a separation assembly 3 is disposed in each of the two separation boxes 2, the separation assembly 3 includes a denitrification box 31 and a dehydration box 32, the dehydration box 32 is disposed at an upper end portion of the separation box 2, and a dehydration molecular sieve is disposed in the dehydration box 32. The tail gas enters the separation box 2 through the second exhaust pipe 16 and is firstly in conflict with the dehydration molecular sieve in the dehydration box 32, and the dehydration molecular sieve can adsorb a small amount of liquid water in the tail gas, so that the probability of liquid water in the tail gas is further reduced.
Referring to fig. 1 and 2, the denitrification box 31 is disposed at the lower end of the separation box 2, a nitrogen molecular sieve is disposed in the denitrification box 31, tail gas passing through the dehydration box 32 enters the denitrification box 31 to contact with the nitrogen molecular sieve, and a mixed gas of hydrogen and nitrogen has a certain pressure, so that the nitrogen molecular sieve can adsorb nitrogen, and an effect of separating nitrogen from liquid water is achieved. The nitrogen molecular sieve can adopt an SOD molecular sieve, the adsorption effect of the SOD molecular sieve on nitrogen is good, and compared with a membrane separation device, the nitrogen molecular sieve is not easy to generate a liquid resistance phenomenon, thereby being beneficial to improving the separation effect on hydrogen.
Referring to fig. 2 and 4, the two separation tanks 2 are connected with a fourth exhaust pipe 21 and a fifth exhaust pipe 22, respectively, the fourth exhaust pipe 21 and the fifth exhaust pipe 22 are connected with a second reversing valve, the second reversing valve communicates the fourth exhaust pipe 21, the fifth exhaust pipe 22 is closed, a nitrogen concentration measuring sensor is provided at an output end of the second reversing valve, hydrogen gas completing nitrogen separation is discharged through the fourth exhaust pipe 21 and the second reversing valve, and the nitrogen concentration measuring sensor measures the nitrogen concentration of the output gas.
Referring to fig. 2 and 4, since the adsorption capacity of the nitrogen molecular sieve to nitrogen is limited, when the nitrogen molecular sieve is saturated due to adsorption of nitrogen, the nitrogen concentration measuring sensor measures that the concentration of nitrogen in the output gas flow reaches a preset value, the first reversing valve 15 closes the second exhaust pipe 16, the third exhaust pipe 17 is communicated, the second exhaust valve closes the fourth exhaust pipe 21, and the fifth exhaust pipe 22 is communicated, so that the switching of the separation tank 2 is realized.
Referring to fig. 2 and 4, the two separation boxes 2 are connected with a sixth exhaust pipe 23 and a seventh exhaust pipe 24, the sixth exhaust pipe 23 and the seventh exhaust pipe 24 are connected with a third reversing valve, the third reversing valve communicates the sixth exhaust pipe 23, the seventh exhaust pipe 24 is closed, the sixth exhaust pipe 23 is used for releasing pressure to the connected separation boxes 2, nitrogen adsorbed by the nitrogen molecular sieve is desorbed, the two separation boxes 2 alternately adsorb nitrogen, and the separation effect of the nitrogen is ensured. The amount of liquid water in the tail gas entering the separation box 2 is small, the dehydrated molecular sieve is replaced manually at regular intervals, and the dehydrated molecular sieve can be regenerated at high temperature, so that the repeated use is realized.
Referring to fig. 1 and 5, in the exhaust gas recovery system of the actual hydrogen fuel cell, there is a small fluctuation in the flow rate of the intake pipe 12 and the first exhaust pipe 13, and the fluctuation in the flow rate affects the pressure difference between the intake pipe 12 and the first exhaust pipe 13. The air inlet pipe 12 is fixedly provided with an adjusting pipe 4, two adjusting plates 41 are connected in a sliding manner in the adjusting pipe 4, the air inlet pipe 12 is provided with a valve core 42 in a penetrating manner, and two ends of the valve core 42 in the length direction are fixedly connected with the corresponding adjusting plates 41.
Referring to fig. 1 and 5, an intake pipe 12 is connected to a lower end portion of the adjustment pipe 4, a first exhaust pipe 13 is connected to an upper end portion of the adjustment pipe 4, and an adjustment assembly 5 is provided in the adjustment pipe 4. The adjusting assembly 5 comprises a first corrugated tube 51 and a second corrugated tube 52, the first corrugated tube 51 is communicated with the air inlet tube 12, the second corrugated tube 52 is communicated with the first air outlet tube 13, and the first corrugated tube 51 and the second corrugated tube 52 are fixedly connected with the corresponding adjusting plate 41 respectively.
Referring to fig. 1 and 5, when the flow rate of the intake pipe 12 becomes large, the pressure of the intake pipe 12 increases, the pressure difference between the intake pipe 12 and the first exhaust pipe 13 increases, the first bellows 51 expands, the second bellows 52 contracts, the first bellows 51 and the second bellows 52 cooperate to push the valve element 42 upward, the flow rate of the gas entering the liquid separation chamber 11 decreases, and when the flow rate of the intake pipe 12 returns to the original size, the valve element 42 returns under the push of the first bellows 51 and the second bellows 52.
Referring to fig. 1 and 5, when the flow rate of the intake pipe 12 becomes smaller, the pressure of the intake pipe 12 decreases, the pressure difference between the intake pipe 12 and the first exhaust pipe 13 increases, the first bellows 51 contracts, the second bellows 52 expands, the first bellows 51 and the second bellows 52 cooperate to push the valve element 42 to move downward, the flow rate of the gas entering the liquid separation chamber 11 decreases, the flow rate of the first exhaust pipe 13 decreases, and the pressure difference between the intake pipe 12 and the first exhaust pipe 13 stabilizes. When the flow rate of the intake pipe 12 returns to the original size, the valve element 42 is moved up and reset by the pushing of the first and second bellows 51 and 52.
Referring to fig. 5 and 6, a plurality of limiting rods 43 are fixedly arranged in the adjusting tube 4 along the circumferential direction, the limiting rods 43 penetrate through the two adjusting plates 41 and are in sliding connection with the adjusting plates 41, the limiting rods 43 can limit the sliding plates, and the deflection probability of the sliding plates can be reduced. The outer walls of the first corrugated pipe 51 and the second corrugated pipe 52 are fixedly provided with a plurality of limiting rings 44, and the limiting rings 44 are in sliding connection with the corresponding limiting rods 43. The limit rod 43 is matched with the limit ring 44, so that the probability of deflection bending of the first corrugated pipe 51 and the second corrugated pipe 52 can be reduced, and the effect of limiting the first corrugated pipe 51 and the second corrugated pipe 52 is achieved.
The implementation principle of the gas-water separation device in the embodiment of the application is as follows: the tail gas is conveyed into the liquid separating cavity 11 through the air inlet pipe 12, and after entering the liquid separating cavity 11, the tail gas is abutted against the inner wall of the shell 1, so that the tail gas forms a descending cyclone, and liquid water is gradually collected under the centrifugal action of the cyclone and abutted against the inner wall of the shell 1. The liquid water gradually moves downwards under the action of the cyclone and is accumulated at the lower end part of the shell 1, so that the separation of the liquid water in the tail gas in the great majority can be realized, and the liquid water is discharged by the liquid discharge valve 18. The exhaust gas is discharged through the first exhaust pipe 13. The first reversing valve 15 communicates the second exhaust pipe 16, and the third exhaust pipe 17 is closed. The tail gas enters the separation box 2 through the second exhaust pipe 16 and is firstly in conflict with the dehydration molecular sieve in the dehydration box 32, and the dehydration molecular sieve can adsorb a small amount of liquid water in the tail gas, so that the probability of liquid water in the tail gas is further reduced. The tail gas passing through the dehydration box 32 enters the denitrification box 31 to be in contact with the nitrogen molecular sieve, and the mixed gas of the hydrogen and the nitrogen has certain pressure, so that the nitrogen molecular sieve can adsorb the nitrogen, and the effect of separating the nitrogen from the liquid water is realized. The nitrogen molecular sieve can adopt an SOD molecular sieve, the adsorption effect of the SOD molecular sieve on nitrogen is good, and compared with a membrane separation device, the nitrogen molecular sieve is not easy to generate a liquid resistance phenomenon, thereby being beneficial to improving the separation effect on hydrogen.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (8)
1. Gas-water separation device, comprising a housing (1), characterized in that: a liquid separation cavity (11) is formed in the shell (1), an air inlet pipe (12) communicated with the liquid separation cavity (11) is fixedly arranged at one end of the shell (1) along the width direction, a first exhaust pipe (13) communicated with the liquid separation cavity (11) is fixedly arranged at one end of the shell (1) along the height direction, a wind shield (14) is fixedly arranged in the shell (1), and the wind shield (14) is positioned in the liquid separation cavity (11) and corresponds to the first exhaust pipe (13); the first exhaust pipe (13) is provided with a first reversing valve (15), two output ends of the first reversing valve (15) are respectively connected with a second exhaust pipe (16) and a third exhaust pipe (17), the shell (1) is fixedly provided with two separation boxes (2), and the second exhaust pipe (16) and the third exhaust pipe (17) are respectively communicated with the corresponding separation boxes (2); the two separation boxes (2) are internally provided with separation assemblies (3) for separating liquid water and nitrogen, and the lower end part of the shell (1) is provided with a liquid discharge valve (18).
2. A gas-water separation device according to claim 1, characterized in that: the separation assembly (3) comprises a denitrification box (31) and a dehydration box (32), the dehydration box (32) is arranged at the upper end part of the separation box (2), and a dehydration molecular sieve is arranged in the dehydration box (32); the nitrogen removal box (31) is arranged at the lower end part of the separation box (2), a nitrogen molecular sieve is arranged in the nitrogen removal box (31), the lower end parts of the two separation boxes (2) are respectively connected with a fourth exhaust pipe (21) and a fifth exhaust pipe (22), the two separation boxes (2) are connected with a sixth exhaust pipe (23) and a seventh exhaust pipe (24), and the sixth exhaust pipe (23) and the seventh exhaust pipe (24) are communicated with the corresponding nitrogen removal box (31).
3. A gas-water separation device according to claim 1, characterized in that: the air inlet pipe (12) is fixedly provided with an adjusting pipe (4), two adjusting plates (41) are connected in the adjusting pipe (4) in a sliding mode, a valve core (42) is arranged in the air inlet pipe (12) in a penetrating mode, two ends of the valve core (42) in the length direction are fixedly connected with the corresponding adjusting plates (41), the air inlet pipe (12) is connected with the lower end portion of the adjusting pipe (4), the first exhaust pipe (13) is connected with the upper end portion of the adjusting pipe (4), and an adjusting assembly (5) for adjusting the position of the valve core (42) is arranged in the adjusting pipe (4).
4. A gas-water separation device according to claim 3, wherein: the adjusting component (5) comprises a first corrugated pipe (51) and a second corrugated pipe (52), the first corrugated pipe (51) is communicated with the air inlet pipe (12), the second corrugated pipe (52) is communicated with the first air outlet pipe (13), and the first corrugated pipe (51) and the second corrugated pipe (52) are fixedly connected with the corresponding adjusting plates (41) respectively.
5. A gas-water separation device according to claim 4, wherein: a plurality of limiting rods (43) are fixedly arranged in the adjusting pipe (4) along the circumferential direction, the limiting rods (43) penetrate through the two adjusting plates (41) and are in sliding connection with the adjusting plates (41), a plurality of limiting rings (44) are fixedly arranged on the outer walls of the first corrugated pipe (51) and the second corrugated pipe (52), and the limiting rings (44) are in sliding connection with the corresponding limiting rods (43).
6. A gas-water separation device according to claim 1, characterized in that: first spiral plate (111) is fixedly connected with in circumference in casing (1), and first spiral plate (111) are located branch liquid chamber (11), and first spiral plate (111) fixedly connected with baffle (112).
7. A gas-water separation device according to claim 6, wherein: the lower end part of the baffle plate (112) is fixedly connected with a drainage plate (113).
8. A gas-water separation device according to claim 1, characterized in that: the first exhaust pipe (13) is fixedly connected with a water baffle (131), and the water baffle (131) is positioned in the liquid separation cavity (11).
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| CN116571012B (en) | 2024-05-14 |
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