CN115986176A - Water-gas separation and discharge device for hydrogen fuel cell of rail transit vehicle and control method - Google Patents
Water-gas separation and discharge device for hydrogen fuel cell of rail transit vehicle and control method Download PDFInfo
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- CN115986176A CN115986176A CN202310026583.4A CN202310026583A CN115986176A CN 115986176 A CN115986176 A CN 115986176A CN 202310026583 A CN202310026583 A CN 202310026583A CN 115986176 A CN115986176 A CN 115986176A
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Abstract
The invention discloses a water-gas separation and discharge device and a control method for a hydrogen fuel cell of a rail transit vehicle, wherein the water-gas separation and discharge device and the control method for the hydrogen fuel cell of the rail transit vehicle comprise a voltage sensor, a hydrogen concentration sensor, a stack shell purging device, a primary water-gas separation unit, a tail exhaust valve, a secondary water-gas separation unit and a tail exhaust gas output pipe; the hydrogen concentration sensor is used for detecting the hydrogen concentration in tail exhaust gas, the tail exhaust valve carries out periodic pulse type emission on the hydrogen loop for discharging liquid water and impurity gas on the anode side of the galvanic pile, and the galvanic pile shell blowing equipment is used for mixing hydrogen with air tail gas after the hydrogen is discharged and reducing the hydrogen concentration. The invention can safely and effectively complete gas-water separation of the tail exhaust gas generated by the hydrogen fuel cell, improve the safety and reliability of the tail exhaust gas of the hydrogen fuel cell system and reduce the influences of substances in the tail exhaust gas on hydrogen brittleness, corrosion and the like of a vehicle body unit.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cells, in particular to a water-gas separation and discharge device of a hydrogen fuel cell of a rail transit vehicle and a control method.
Background
With the development of industrial technology, people have higher and higher requirements on environmental protection of vehicles in rail transit. In recent years, power fuel cells mainly including hydrogen fuel cells are applied to rail transit more and more due to their green and environmental protection. The fuel cell is loaded on the rail vehicle, so that the aim of cleaning traffic can be fulfilled, and the line cost caused by a contact net, a third rail or a charging pile of the rail vehicle can be reduced.
The hydrogen fuel cell technology is the mainstream direction of global clean energy development and utilization, the direct electrochemical reaction of hydrogen and oxygen is used for generating electricity, the reverse process of water electrolysis is adopted, the hydrogen fuel only generates water vapor, nitrogen, sulfur and carbon oxides such as carbon monoxide, carbon particles and dense smoke are not generated, and the hydrogen fuel cell technology is clean and environment-friendly. The tail exhaust gas of the hydrogen fuel cell is mainly liquid water and impurity gas of the anode side of the pile, including air, water in liquid and steam forms, a small amount of hydrogen, nitrogen and oxygen, and the like.
The tail exhaust gas contains a small amount of unreacted hydrogen (non-continuous 1-3%). If the tail water is directly contacted with a vehicle roof (made of carbon steel) for a long time, hydrogen molecules dissolved in the steel cause stress concentration, so that cracks are formed in the steel, embrittlement usually causes metal fatigue due to crack propagation, and the structural strength is reduced. The water vapor contains water and a small amount of hydrogen, nitrogen and oxygen, which can cause safety hazard if the discharge is not smooth, for example, the explosive concentration can be reached if a small amount of hydrogen is accumulated in the pipeline for a long time, and the limit of the explosive concentration of the mixed hydrogen and air is 4-75% (volume fraction); the water pipe backflow can be generated when the lower water pool is blocked by foreign matters, so that the operation of a hydrogen fuel cell system is influenced; if there is no lower water storage box, the discharge efficiency may be directly affected by the discharge flow rate and the pipe diameter.
The tail drainage gas of the existing hydrogen fuel cell is basically in direct discharge, namely a tail drainage pipeline is directly arranged outside a vehicle body, is similar to an air conditioner drainage pipe, and substances in the tail drainage are easy to generate influences such as hydrogen brittleness, corrosion and the like on the vehicle body structure, or a pipeline opening is simply arranged for exhausting, so that hydrogen can be possibly gathered in a box body for a long time. The utility model discloses a utility model patent that publication number is CN214542301U discloses a water and gas separator device that fuel cell used, and the device includes the water-gas separation box, the water-gas separation box first half seted up the air inlet, the gas outlet has been seted up at water-gas separation box top, the bottom of water-gas separation box is provided with the drain valve, be fixed with welding pipe one on the gas outlet, welding pipe one is connected with the gas outlet pipe way through twisting fast joint one, is fixed with welding pipe two on the air inlet, welding pipe two is twisted fast and is connected with the inlet line way. The gas outlet of the device is connected with a gas outlet pipeline through a welded pipe and a quick-screwing joint, the pipe diameter of the gas outlet is relatively small, emission efficiency is affected, hydrogen is possibly gathered in the box body for a long time, and safety and reliability of tail exhaust gas of a hydrogen fuel cell system are affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a water-gas separation and discharge device for a hydrogen fuel cell of a rail transit vehicle; meanwhile, the invention is provided with a water-gas separation and discharge control method for the hydrogen fuel cell of the rail transit vehicle, so that the safety and reliability of tail drainage water gas of the hydrogen fuel cell system are improved, and the influences of substances in the tail drainage water on hydrogen brittleness, corrosion and the like of a vehicle body structure are reduced.
In order to solve the technical problems, the invention adopts the technical scheme that:
a hydrogen fuel cell water-gas separation discharging device for rail transit vehicles comprises a tail drain water-gas output pipe, and is characterized in that one end of the tail drain water-gas output pipe is sequentially communicated with a primary water-gas separation unit, a tail drain valve, a secondary water-gas separation unit and a drain pipeline;
the primary water-gas separation unit comprises a first separation barrel which is transversely arranged, one end of the first separation barrel is communicated with the tail drainage gas output pipe, the other end of the first separation barrel is communicated with the secondary water-gas separation unit, and the upper part of the first separation barrel is vertically communicated with a first exhaust pipe; the first separation cylinder is formed by splicing and welding a tail discharge inlet, an air pipe opening, a partition plate and a water flow outlet, the upper part of the partition plate is provided with a movable plate, and the lower part of the partition plate is provided with an opening;
the secondary water-gas separation unit comprises a water storage box, the water storage box is fixedly connected with the vehicle body, a secondary water-gas separation cover is arranged at the upper part of the water storage box, and a sewer pipe opening communicated with a drainage pipeline is arranged at the lower part of the water storage box; and the top and the side part of the secondary water-gas separation cover are both provided with an airflow outlet.
The hydrogen concentration sensor is arranged in the reactor shell, and the hydrogen concentration sensor is arranged in the reactor shell;
one end of the tail drain gas output pipe is sequentially communicated with a pressure sensor, a primary water-gas separation unit, a tail drain valve, a secondary water-gas separation unit and a drain pipeline;
the pressure sensor is arranged at the tail water and gas discharge pipe end of the hydrogen fuel cell and is used for measuring the pressure of water in the water-gas separation and discharge device;
the hydrogen concentration sensor and the back pressure valve are arranged between the primary water-gas separation unit and the tail discharge valve of the hydrogen fuel cell, and the stack shell purging device is started according to the detected hydrogen concentration or/and water pressure;
the primary water-gas separation unit comprises a first separation barrel which is transversely arranged, one end of the first separation barrel is communicated with the tail drainage gas output pipe, the other end of the first separation barrel is communicated with the secondary water-gas separation unit, and a first exhaust pipe is vertically communicated with the first separation barrel; a partition plate is arranged on the inner wall of the first separation barrel at the downstream of the first exhaust pipe, a movable plate is arranged at the upper part of the partition plate, the movable plate can carry out self-adaptive adjustment according to water flow pressure, and a gap is reserved between the partition plate and the lower surface of the inner wall of the first separation barrel;
the secondary water-gas separation unit comprises a water storage box, the water storage box is fixedly connected with the vehicle body, a secondary water-gas separation cover is arranged at the upper part of the water storage box, a plurality of holes are arranged on the cover, and a sewer pipe opening communicated with a drainage pipeline is arranged at the lower part of the water storage box; and the top and the side part of the secondary water-gas separation cover are both provided with an airflow outlet.
The stack shell blowing equipment is used for mixing the discharged hydrogen with air tail gas and reducing the concentration of the hydrogen around the water-gas separation device.
The hydrogen concentration sensor is used for detecting the hydrogen concentration in tail exhaust gas.
And the tail discharge valve is used for periodically discharging the hydrogen loop in a pulse mode and is used for discharging liquid water and impurity gas at the anode side of the pile.
The hydrogen fuel cell water-gas separation control method comprises the following steps:
1) The hydrogen fuel system is provided with a hydrogen concentration sensor and a back pressure valve before tail drain gas separation, and the blowing equipment performs air volume control on the blowing equipment according to a detected hydrogen concentration value x% and a pressure detection value carried by the back pressure valve: when the hydrogen fuel cell system is powered on and started, the blow-off equipment is started, and the wind speed can be controlled to be minimum; and when the hydrogen concentration value is larger than x% or the pressure detection value of the backpressure valve is larger than y, the air speed of the blowing and exhausting equipment is adjusted to be high. The combustion limit range of hydrogen is 4-75% (volume fraction), the fuel performance of hydrogen is good, the ignition is fast, and the hydrogen has wide combustible range when mixed with air and has fast combustion speed. Meanwhile, the ignition energy of the hydrogen is very small, the hydrogen can be ignited by electric sparks of human body static electricity, and the blowing and exhausting equipment has the function of ensuring that the concentration of the waste and exhausted hydrogen is always lower than 1%. The back pressure valve at the air side leads the pressure and has a minimum opening at any time.
The hydrogen fuel system is provided with a pressure sensor for detecting the pressure of waste water before tail water discharge gas separation, when the pressure of the waste water is detected to be large, a partition plate arranged on the inner wall of a first separation barrel is opened in a self-adaptive mode, meanwhile, a back pressure valve adjusts the air inlet amount of the system according to a self-contained pressure detection value, at the moment, the blowing equipment is set to run at a high speed, the hydrogen concentration value detected by a tail hydrogen concentration sensor is neutralized, and the discharge control of the tail water discharge gas of the hydrogen fuel cell is started.
When water is generated during the reaction of the hydrogen fuel cell, the pressure sensor detects the pressure fluctuation of the tail exhaust water, the opening degree value of the partition plate arranged on the inner wall of the first separation barrel is adjusted according to the detected pressure value of the tail exhaust water, the opening degree is large when the pressure is large, and both gas and water can enter the secondary water-gas separation unit after passing through the primary water-gas separation unit.
Therefore, according to the hydrogen fuel cell tail exhaust water-gas separation and control method, the primary water-gas separation unit and the secondary water-gas separation unit are arranged to perform water-gas separation twice, the primary water-gas separation and the secondary water-gas separation are safely and controllably performed within the shortest distance of the tail exhaust valve of the hydrogen fuel cell system by the hydrogen fuel cell water-gas separation control method, gas is exhausted through the first exhaust pipe, then the water storage box is designed to perform secondary water-gas separation, the gas is exhausted through the secondary water-gas separation cover provided with the gas flow outlet, and tail exhaust water and tail exhaust gas (hydrogen, nitrogen, oxygen and the like) generated by the hydrogen fuel cell can be safely and controllably performed through the hydrogen fuel cell water-gas separation control method and the secondary water-gas separation, so that the safety and reliability of the tail exhaust water of the hydrogen fuel cell system are improved, and the influences of hydrogen embrittlement, corrosion and the like on a vehicle body structure caused by substances in the tail exhaust water are reduced.
Further, the hydrogen fuel cell water-gas separation control method generates water when the hydrogen fuel cell reacts, the hydrogen concentration sensor is arranged in the tail drain gas space, the blow-off equipment performs air volume control according to the detected hydrogen concentration value, the voltage sensor detects voltage fluctuation, the tail drain valve can detect the pressure of tail drain water, the valve opening value is adjusted according to the detected pressure value of the tail drain water, and the opening is large when the pressure is large. The control method can effectively reduce the hydrogen concentration to the designed value x%.
Furthermore, the tail drain water gas output pipe is connected with the primary water gas separation unit, the primary water gas separation unit is connected with the tail drain valve, the tail drain valve is connected with the secondary water gas separation unit through hoses and clamps, and the sewer pipe opening is connected with a drain pipeline through the clamps.
Furthermore, the tail discharge inlet, the air pipe opening, the partition plate and the water flow outlet are all made of aluminum pipelines, so that hydrogen embrittlement can be effectively prevented, and the hydrogen embrittlement is a phenomenon that after hydrogen enters metal, the local hydrogen concentration is saturated to cause metal plasticity reduction, crack induction or fracture after generation. Prevention and control of hydrogen embrittlement: stainless steel is superior to ordinary steel, and pure aluminum and aluminum alloy are more durable than stainless steel under the condition of air drying.
Further, the drainage pipeline adopts PVC material die sinking hose, fixes through clamp and fixed bolster.
Further, secondary aqueous vapor separation lid is including horizontal round pipe and the upper cover of arranging, pipe one end and upper reaches intercommunication, the other end extend to inside the upper cover, and the breach has been seted up on the upper portion of this extension.
According to the embodiment of the invention, at least one hole in a plurality of holes arranged on the secondary water-gas separation cover has the height lower than the lowest height of the upstream water inlet.
According to the embodiment of the invention, in the primary water-gas separation unit, the partition plate is connected with the downstream pipe wall of the first exhaust pipe. The hydrogen has low density and can naturally go upwards, the upper half part of the clapboard can be adaptively adjusted according to the water flow, and the gas can be effectively discharged through the first exhaust pipe; the pressure value that the baffle self-adaptation was opened big is designed into unanimously with the pressure value of rivers, and when rivers were big, the baffle can be opened big becomes angle Z according to rivers self-adaptation, and gas can effectively be discharged through first exhaust pipe, and the latter half is the through-hole type, and rivers flow to the water storage box.
Compared with the prior art, the invention has the beneficial effects that:
1. the hydrogen fuel cell water-gas separation control method is safe and reliable. When the hydrogen fuel cell generates water during reaction, the hydrogen concentration sensor is arranged in the tail drain gas space, the blow-off equipment performs air volume control according to the detected hydrogen concentration value, the voltage sensor detects voltage fluctuation, the tail drain valve can detect the pressure of tail drain, the valve opening value is adjusted according to the detected pressure value of the tail drain, and the valve opening value is large when the pressure is large. The control method can effectively reduce the hydrogen concentration to the designed value x%.
2. According to the invention, the primary water-gas separation unit and the secondary water-gas separation unit are arranged to perform water-gas separation twice, the primary water-gas separation is performed within the shortest distance of the water discharge valve of the hydrogen fuel cell system, the gas is discharged through the first gas discharge pipe, then the water storage box is designed to perform the secondary water-gas separation, the secondary water-gas separation unit can enlarge the water-gas surface, the water-gas discharge space is wider, the gas is discharged through the secondary water-gas separation cover with a gas flow outlet, the tail discharge water gas generated by the hydrogen fuel cell can be safely and effectively subjected to water-gas separation through the two water-gas separations, the safety and reliability of the tail discharge water gas of the hydrogen fuel cell system are improved, and the influences of substances in the tail discharge water on hydrogen brittleness, corrosion and the like of a vehicle body structure are reduced.
3. The secondary water-gas separation cover in the secondary water-gas separation unit can effectively prevent foreign matters from falling into the water storage box, and prevent the water pipe from flowing back due to the blockage of the foreign matters in the water tank to influence the operation of a hydrogen fuel cell system. Meanwhile, the top and the side of the secondary water-gas separation cover are provided with air outflow holes, and the air outflow holes are used as overflow ports under the condition that the inside of a drainage pipeline is frozen or blocked, so that the tail drainage gas is prevented from flowing back. Through setting up the water storage box, avoid because of discharging the velocity of flow big, the pipe diameter size directly influences emission efficiency.
Drawings
FIG. 1 is a schematic view of a water-gas separation discharge device according to an embodiment of the present invention;
FIG. 2 is a top view of the water-gas separation drain of FIG. 1;
FIG. 3 is a right side view of the water vapor separating drain of FIG. 2;
fig. 4 is a schematic view of a primary water-gas separation unit according to an embodiment of the invention, wherein a is a front view of the primary water-gas separation unit, and b is a left view of a;
FIG. 5 is a top view of the primary water-gas separation unit of FIG. 4;
FIG. 6 is a schematic diagram of a secondary water-gas separation unit according to an embodiment of the present invention;
FIG. 7 is a top view of the secondary water-gas separation unit of FIG. 6;
fig. 8 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A in fig. 7.
Fig. 9 is a schematic diagram of a water-gas separation control method for a hydrogen fuel cell.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 8, the hydrogen fuel cell water-gas separation and discharge device for a rail transit vehicle provided in this embodiment includes a tail drain gas output pipe 2, and a primary water-gas separation unit 1, a tail drain valve 3, a secondary water-gas separation unit 4, and a drain pipeline 5 are sequentially communicated with one end 2 of the tail drain gas output pipe.
The primary water-gas separation unit 1 comprises a first separation barrel 11 which is transversely arranged, one end of the first separation barrel is communicated with the tail drainage gas output pipe 2, the other end of the first separation barrel is communicated with the secondary water-gas separation unit 4, and the upper part of the first separation barrel is vertically communicated with a first exhaust pipe 18; the first separation cylinder 11 is formed by welding a tail discharge inlet 111, an air pipe port 112, a partition plate 116 and a water outlet 117, wherein the upper part of the partition plate 116 is a solid plate, and the lower part is open.
The secondary water-gas separation unit 4 comprises a water storage box 42, the water storage box 42 is welded with the vehicle body into a whole, the upper part of the water storage box is provided with a secondary water-gas separation cover 41, and the lower part of the water storage box is provided with a sewer pipe opening 43 communicated with the drainage pipeline 5; airflow outlets are formed in the top and the side of the secondary water-gas separation cover 41.
In some embodiments, the first exhaust pipe 18 includes an air pipe port 182, an intermediate air pipe 183, and an air outlet 184, which are connected in series.
In some embodiments, referring to fig. 1, the tail drain water outlet pipe 2 and the primary water-gas separation unit 1, the primary water-gas separation unit 1 and the tail drain valve 3, and the tail drain valve 3 and the secondary water-gas separation unit 4 are connected by hoses and clamps 7, and the drain pipe opening 43 is connected with the drain pipe 5 by clamps. Such a connection mode has the characteristics of easy disassembly.
In some embodiments, the tail inlet 111, the air tube port 182, the baffle 116, and the water outlet 117 are aluminum tubes.
In some embodiments, the water storage box 42 and the sewer opening 43 are made of stainless steel.
In some embodiments, the drainage pipeline 5 is made of a PVC mold-opening hose, and is fixed by a clamp 7 and a fixing bracket 6.
In some embodiments, the secondary water-gas separation cover 41 includes a circular tube 411 and an upper cover 412, the circular tube 411 extends into the upper cover 412, and the upper portion of the circular tube 411 located inside the upper cover 412 is provided with a notch. Therefore, the way of opening the upper part of the circular tube 411 is beneficial to discharging water vapor and impurity gases.
In some embodiments, the upper portion of the water storage box 42 is provided with a mounting screw hole for fixing the secondary water-air separation cover 41.
The embodiment of the invention has the following specific implementation process:
a rail transit vehicle hydrogen fuel cell water-gas separation discharging device and a control method thereof comprise a voltage sensor, a hydrogen concentration sensor, a pile shell blowing device, a primary water-gas separation unit, a tail exhaust valve, a secondary water-gas separation unit and a tail exhaust gas output pipe; the hydrogen concentration sensor is used for detecting the hydrogen concentration in tail exhaust gas, the tail exhaust valve performs periodic pulse type emission on the hydrogen loop, the hydrogen loop is used for discharging liquid water and impurity gas on the anode side of the galvanic pile, and the galvanic pile shell blowing equipment is used for mixing the hydrogen with air tail gas after the hydrogen is discharged, so that the hydrogen concentration is effectively reduced to a design value x%.
The hydrogen fuel system is provided with a hydrogen concentration sensor and a back pressure valve before tail drain gas separation, and the blowing equipment performs air volume control on the blowing equipment according to a detected hydrogen concentration value x% and a pressure detection value carried by the back pressure valve: when the hydrogen fuel cell system is powered on and started, the blow-off equipment is started, and the wind speed can be controlled to be minimum; and when the hydrogen concentration value is larger than x% or the pressure detection value of the backpressure valve is larger than y, the air speed of the blowing and exhausting equipment is adjusted to be high.
The hydrogen fuel system sets up pressure sensor before tail drain gas separation and detects the pressure of waste water drainage, presses greatly when detecting waste water drainage, and the baffle upper portion that then sets up on the first separating cylinder inner wall is the loose plate, but self-adaptation is opened greatly, and the back pressure valve is according to the volume of the pressure measurement value governing system air admission from taking simultaneously, blows the blow-off equipment this moment and sets up to high-speed operation, and the hydrogen concentration value that the tail hydrogen concentration sensor detected of neutralization is arranged, opens the exhaust control of hydrogen fuel cell tail drain gas.
When water is generated during the reaction of the hydrogen fuel cell, the pressure sensor detects the pressure fluctuation of tail exhaust water, the opening degree value of a movable plate at the upper part of a partition plate arranged on the inner wall of the first separation cylinder is adjusted according to the detected pressure value of the tail exhaust water, the opening degree is large when the pressure is large, and gas and water can enter the secondary water-gas separation unit after passing through the primary water-gas separation unit.
Four parts of the tail discharge inlet 111, the air pipe port 182, the partition plate 116 and the water outlet 117 in the primary water-gas separation unit 1 are all made of aluminum pipelines and form a first separation barrel through tailor welding, as shown in fig. 4 and 5. The partition plate 116 in the primary water-gas separation unit 1 is designed into an upper movable plate, the lower part of the partition plate is opened, the upper solid plate blocks the impurity gas in the tail exhaust gas, and according to the characteristics of low gas density and natural rising, the tail exhaust gas flows to the gas flow outlet 184 along the tail exhaust inlet 111 and the middle gas pipe 183 and is discharged out of the pipeline; the tail drain water flows from the lower opening to the water outlet 117; the middle air pipe 183 can be fixed by a hose and a clamp 7, the length and the shape of the middle air pipe 183 can be designed according to the cabinet or the requirement of the field, and the fixing plate 15 of the air outlet 184 can be arranged at a position which can be supported and fixed.
After the tail drain water flows from the lower opening of the partition 116 to the water outlet 117, the tail drain water flows into the water storage box 42 through the tail drain valve 3 and the secondary water-air separation cover 41. The secondary water-gas separation cover 41 comprises a circular tube 411 and an upper cover 412 which are transversely arranged, the circular tube 411 extends into the upper cover 412, the upper part of the circular tube 411 positioned in the upper cover 412 is provided with a notch, and the mode that the notch is opened at the upper part of the circular tube 411 is favorable for discharging water vapor and impurity gases. The secondary water-air separation cover 41 has air outlet holes at the top and the side, and the secondary water-air separation cover 41 and the water storage box 42 can realize the secondary water-air separation of tail exhaust water. Water storage box 42 adopts stainless steel, welds as an organic wholely with the automobile body, and upper portion design installation screw hole is used for fixed secondary water gas separation lid 41, and lower part design stainless steel material outlet 43, and water drainage pipeline 5 is fixed through clamp 7 and outlet 43, and water drainage pipeline 5 adopts PVC material die sinking hose, can fall into the sub-assembly, adopts clamp 7 and fixed bolster 6 to carry out effective fixed between two liang of pipelines.
The water-gas separation unit 1 is connected and fixed with the tail drain water-gas output pipe 2 and the tail drain valve 3 through the hoses and the hoops 7, the tail drain valve 3 is connected with the secondary water-gas separation unit 4 through the middle hose and the hoops 7, and the connection mode has the characteristic of easiness in disassembly. The hydrogen fuel tail exhaust gas flows in from a tail exhaust gas output pipe 2, after passing through a primary water-gas separation unit 1, tail exhaust water and tail exhaust impurity gas can be effectively separated for the first time, then the hydrogen fuel tail exhaust gas enters a secondary water-gas separation unit 4 through a tail exhaust valve 3, the water-gas surface can be enlarged by the secondary water-gas separation unit 4, the water-gas discharge space is wider, secondary water-gas separation is carried out, and finally water and gas are smoothly discharged out of a vehicle. If the drainage pipeline 5 is frozen and blocked, the air outlet of the secondary water-air separation cover 41 can be used as an overflow port to discharge water air from the side surface, so that tail drainage air is prevented from flowing back; the PVC composite hose drainage pipeline 5 can be dredged by heating, squeezing or disassembling.
The above-described embodiments are set forth so that this disclosure will be thorough and complete, and will not be limited by any theory presented in the preceding claims, which may suggest themselves to those skilled in the art after reading this disclosure and all equivalents thereof that fall within the scope of the invention as defined in the claims appended hereto.
Claims (9)
1. A hydrogen fuel cell water-gas separation discharging device for rail transit vehicles comprises a tail drain water-gas output pipe, and is characterized in that one end of the tail drain water-gas output pipe is sequentially communicated with a primary water-gas separation unit, a tail drain valve, a secondary water-gas separation unit and a drain pipeline;
the primary water-gas separation unit comprises a first separation barrel which is transversely arranged, one end of the first separation barrel is communicated with the tail drainage gas output pipe, the other end of the first separation barrel is communicated with the secondary water-gas separation unit, and the upper part of the first separation barrel is vertically communicated with a first exhaust pipe; the first separation cylinder is formed by splicing and welding a tail discharge inlet, an air pipe opening, a partition plate and a water flow outlet, the upper part of the partition plate is provided with a movable plate, and the lower part of the partition plate is provided with an opening;
the secondary water-gas separation unit comprises a water storage box, the water storage box is fixedly connected with the vehicle body, a secondary water-gas separation cover is arranged at the upper part of the water storage box, and a sewer pipe opening communicated with a drainage pipeline is arranged at the lower part of the water storage box; and the top and the side part of the secondary water-gas separation cover are both provided with an airflow outlet.
2. The hydrogen fuel cell water-gas separation and discharge device for rail transit vehicles according to claim 1, characterized in that
The hydrogen concentration sensor is arranged in the reactor shell, and the hydrogen concentration sensor is arranged in the reactor shell; one end of the tail drain gas output pipe is sequentially communicated with a pressure sensor, a primary water-gas separation unit, a tail drain valve, a secondary water-gas separation unit and a drain pipeline;
the pressure sensor is arranged at the tail water and gas discharge pipe end of the hydrogen fuel cell and is used for measuring the pressure of water in the water-gas separation and discharge device;
the hydrogen concentration sensor and the back pressure valve are arranged between the primary water-gas separation unit and the tail discharge valve of the hydrogen fuel cell, and the stack shell purging device is started according to the detected hydrogen concentration or/and water pressure;
the stack shell blowing equipment is used for mixing the discharged hydrogen with air tail gas to reduce the concentration of the hydrogen around the water-gas separation device;
the hydrogen concentration sensor is used for detecting the concentration of hydrogen in tail exhaust gas;
and the tail discharge valve is used for periodically discharging the hydrogen loop in a pulse mode and discharging liquid water and impurity gas at the anode side of the pile.
3. The hydrogen fuel cell water-gas separation and discharge device for the rail transit vehicle as claimed in claim 1, wherein the tail drain water outlet pipe and the primary water-gas separation unit, the primary water-gas separation unit and the tail drain valve, and the tail drain valve and the secondary water-gas separation unit are connected through hoses and hoops, and the sewer pipe port is connected with the drain pipe through a hoop.
4. The hydrogen fuel cell water-gas separation and discharge device for the rail transit vehicle as claimed in claim 1, wherein the tail discharge inlet, the gas pipe opening, the partition plate and the water outlet are all made of aluminum material.
5. The hydrogen fuel cell water-gas separation and discharge device for the rail transit vehicle as claimed in claim 1, wherein the water discharge pipeline is a PVC (polyvinyl chloride) open-mold hose, and is fixed by a clamp and a fixing support.
6. The hydrogen fuel cell water-gas separation discharging device of rail transit vehicle as claimed in claim 1, wherein the secondary water-gas separation cover comprises a circular tube and an upper cover which are transversely arranged, one end of the circular tube is communicated with the upstream, the other end of the circular tube extends to the inside of the upper cover, and the upper part of the extending part is provided with a notch.
7. The hydrogen fuel cell water-gas separation discharging device for the rail transit vehicle as claimed in claim 6, wherein at least one of the holes formed in the secondary water-gas separation cover is lower than the lowest height of the upstream water inlet.
8. The hydrogen fuel cell water-gas separation control method comprises the following steps:
1) When the hydrogen fuel cell system is electrified and started, the blow-off equipment is started; when the hydrogen concentration value is larger than x% or the pressure detection value of the backpressure valve is larger than y, the air speed of the blowing and exhausting equipment is adjusted to be high;
2) When the waste water discharge pressure is detected to be large, the partition plate arranged on the inner wall of the first separation barrel is opened in a self-adaptive mode, and meanwhile the back pressure valve
Adjusting the air inlet quantity of the system according to the pressure detection value of the system, setting the blow-off equipment to run at a high speed, neutralizing the hydrogen concentration value detected by the tail exhaust hydrogen concentration sensor, and starting the exhaust control of the tail exhaust gas of the hydrogen fuel cell;
3) When water is generated during the reaction of the hydrogen fuel cell, the pressure sensor detects the pressure fluctuation of the tail exhaust water, the opening degree value of the partition plate arranged on the inner wall of the first separation barrel is adjusted according to the detected pressure value of the tail exhaust water, the opening degree is large when the pressure is large, and both gas and water can enter the secondary water-gas separation unit after passing through the primary water-gas separation unit.
9. The hydrogen fuel cell water-gas separation control method according to claim 8, characterized in that:
the voltage sensor detects voltage fluctuation, the tail discharge valve can detect the pressure of tail discharge water, the valve opening value is adjusted according to the detected pressure value of the tail discharge water, the opening is large when the pressure is large, and the hydrogen concentration is reduced to the designed value x%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310026583.4A CN115986176A (en) | 2023-01-09 | 2023-01-09 | Water-gas separation and discharge device for hydrogen fuel cell of rail transit vehicle and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310026583.4A CN115986176A (en) | 2023-01-09 | 2023-01-09 | Water-gas separation and discharge device for hydrogen fuel cell of rail transit vehicle and control method |
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| CN115986176A true CN115986176A (en) | 2023-04-18 |
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| CN202310026583.4A Pending CN115986176A (en) | 2023-01-09 | 2023-01-09 | Water-gas separation and discharge device for hydrogen fuel cell of rail transit vehicle and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116885382A (en) * | 2023-09-07 | 2023-10-13 | 电子科技大学长三角研究院(湖州) | High-safety explosion-proof battery pack |
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2023
- 2023-01-09 CN CN202310026583.4A patent/CN115986176A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116885382A (en) * | 2023-09-07 | 2023-10-13 | 电子科技大学长三角研究院(湖州) | High-safety explosion-proof battery pack |
| CN116885382B (en) * | 2023-09-07 | 2023-12-22 | 电子科技大学长三角研究院(湖州) | High-safety explosion-proof battery pack |
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