JP4362272B2 - Condenser for fuel cell system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a condenser for a fuel cell system that recovers water vapor in exhaust gas flowing out from a fuel cell as recycled water.
[0002]
[Prior art]
Recently, an automobile using a fuel cell has been developed, and in such a fuel cell automobile, water vapor in exhaust gas flowing out from the fuel cell is recovered as reused water.
[0003]
FIG. 17 schematically shows a conventional pure water recovery system. In this pure water recovery system, the exhaust gas generated in the fuel cell 1 is led to an air-cooled condenser 2 and cooled by air to remove condensed water. It contains exhaust gas.
[0004]
The exhaust gas containing condensed water is guided to the steam separator 3 and separated into condensed water and exhaust gas, and the separated exhaust gas is discharged into the atmosphere.
[0005]
On the other hand, the separated condensed water is guided to the water tank 4 and collected as pure water.
[0006]
The pure water in the water tank 4 is circulated to the cooler 6 by the water pump 5 and cooled to a predetermined temperature.
[0007]
The pure water in the water tank 4 is supplied to the fuel cell 1 side by the water pump 7 and is used, for example, as humidification for an air supply system or cooling water for a cooling system.
[0008]
[Problems to be solved by the invention]
However, in such a conventional pure water recovery system, the water vapor in the exhaust gas is condensed by the air-cooled condenser 2 and the condensed water and the gas are separated by the steam separator 3. In addition, there is a problem that the steam separator 3 is required and the system becomes large.
[0009]
Moreover, since the exhaust gas containing condensed water is usually in an overheated state at the outlet of the condenser 2, when this exhaust gas is transferred to the steam-water separator 3 through the pipe 8, the condensed water becomes mist during the transfer, There was a problem that the amount of condensed water that evaporated into the exhaust gas and separated by the steam separator 3 decreased.
[0010]
The present invention has been made to solve such a conventional problem, and an object thereof is to provide a fuel cell system condenser that can eliminate the need for a steam separator.
[0011]
[Means for Solving the Problems]
The fuel cell system condenser according to claim 1, wherein a tank communicating with the tube is disposed on both sides of a core portion in which tubes and fins are alternately stacked, and the fuel that has flowed into the inlet side tank portion from the gas inlet. In the condenser for a fuel cell system, the exhaust gas containing water vapor from the battery is led to the outlet side tank part through the tube, and the exhaust gas flows out from the gas outlet of the outlet side tank part. In addition, an air / water separation means for separating condensed water from the exhaust gas flowing out from the tube is disposed, and an outlet for discharging the separated condensed water is provided in the outlet side tank portion.
[0012]
The fuel cell system condenser according to claim 2 is the fuel cell system condenser according to claim 1, wherein the steam separator separates the exhaust gas flowing out from the tube into the outlet side tank portion in a horizontal direction. It has an eliminator that leads to
[0013]
The fuel cell system condenser according to claim 3 is the fuel cell system condenser according to claim 1, wherein the steam separator separates the exhaust gas flowing out of the tube into the outlet side tank portion in the vertical direction. It has an eliminator provided with a plurality of guide plates that flow in a different manner, and the interval between the guide plates that guide the exhaust gas upward is wider than the interval between the guide plates that guide the exhaust gas downward.
[0014]
The fuel cell system condenser according to claim 4 is the fuel cell system condenser according to claim 2 or claim 3, wherein the steam-water separation means collides with the exhaust gas that has passed through the eliminator and bypasses the flow of the exhaust gas. And having a baffle plate that leads to the gas outlet.
[0015]
The fuel cell system condenser according to claim 5 is the fuel cell system condenser according to any one of claims 2 to 4, wherein the steam-water separation means is the condensed water separated by the eliminator. It has the drain board which isolate | separates from the flow of the said waste gas.
[0016]
(Function)
In the fuel cell system condenser according to claim 1, the exhaust gas containing water vapor from the fuel cell flows into the inlet side tank part from the gas inlet and is guided to the outlet side tank part via the tube. It is cooled by exchanging heat with the air passing through the section, and the water vapor in the exhaust gas is condensed to become exhaust gas containing condensed water.
[0017]
When the exhaust gas containing condensed water flows out from the tube to the outlet side tank part, the condensed water is separated from the exhaust gas by the steam-water separating means arranged in the outlet side tank part, and the exhaust gas from which the condensed water is separated is The gas is discharged from the gas outlet to the atmosphere, and the condensed water is discharged from the outlet.
[0018]
In the fuel cell system condenser according to the second aspect, the exhaust gas flowing out from the tube into the outlet side tank portion is guided in a zigzag shape in the horizontal direction by the eliminator, so that the condensed water is reliably separated from the exhaust gas.
[0019]
In the fuel cell system condenser according to claim 3, the exhaust gas flowing out from the tube into the outlet side tank portion is caused to flow in the vertical direction by the guide plate of the eliminator, and thereby the condensed water is separated from the exhaust gas. .
[0020]
Since the interval between the guide plates for guiding the exhaust gas upward is made larger than the interval between the guide plates for guiding the exhaust gas downward, the flow rate when the exhaust gas rises is slower than the flow rate when the exhaust gas descends. The drop of the liquid droplet is prevented from rising and the liquid drop is promoted.
[0021]
In the fuel cell system condenser according to claim 4, when the exhaust gas that has passed through the eliminator collides with the baffle plate, small water droplets remaining in the exhaust gas without being removed by the eliminator are dripped, and more condensed water is extracted from the exhaust gas. Securely separated.
[0022]
In the fuel cell system condenser according to the fifth aspect, the condensed water separated by the eliminator is separated from the flow of the exhaust gas by the drain board and led to the discharge port.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described in detail.
[0024]
FIG. 1 and FIG. 2 show details of the main part of FIG. 3, and FIG. 3 shows a first embodiment of the condenser for a fuel cell system of the present invention.
[0025]
In FIG. 3, the code | symbol 11 has shown the core part arrange | positioned horizontally.
[0026]
The core portion 11 is configured by alternately laminating flat tubes 13 made of stainless steel and corrugated fins 15, for example.
[0027]
On both sides of the core portion 11, tanks 17 and 19 made of, for example, stainless steel cylindrical pipes are disposed with the axial length direction horizontal.
[0028]
The tanks 17 and 19 are formed with tube holes 17a and 19a into which the end portions of the tubes 13 are inserted at intervals in the axial direction.
[0029]
In this embodiment, one tank 17 is partitioned by a partition plate 21, and an inlet side tank portion 23 and an outlet side tank portion 25 are formed.
[0030]
In the inlet side tank portion 23, an inlet pipe 27 is opened for flowing the exhaust gas G containing water vapor from the fuel cell.
[0031]
And in the outlet side tank part 25, the steam-water separation means 29 which isolate | separates condensed water from the waste gas which flowed out from the tube 13 is arrange | positioned.
[0032]
FIGS. 1 and 2 show details of the outlet side tank unit 25 and the steam / water separation means 29. The steam / water separation means 29 has, for example, an eliminator 31, a baffle plate 33 and a drain board 35 made of stainless steel. is doing.
[0033]
The eliminator 31 acts to guide the exhaust gas G flowing out from the tube 13 into the outlet side tank unit 25 in a zigzag shape in the horizontal direction.
[0034]
As shown in FIG. 1, the eliminator 31 is configured by arranging a large number of dog-shaped guide plates 37 in parallel in the axial length direction of the outlet side tank portion 25.
[0035]
Further, as shown in FIG. 2, each guide plate 37 is disposed vertically in the outlet side tank portion 25, and the bent portion 37 a of the guide plate 37 is positioned at the approximate center of the outlet side tank portion 25. .
[0036]
Both sides of the upper end of the guide plate 37 are in contact with the inner surface of the outlet side tank portion 25.
[0037]
A gas outlet 17b is formed on a side surface of the outlet side tank portion 25 opposite to the tube 13, and an outlet pipe 39 is connected horizontally to the gas outlet 17b.
[0038]
A baffle plate 33 is arranged vertically between the eliminator 31 in the outlet side tank unit 25 and the gas outlet 17b.
[0039]
The baffle plate 33 acts to collide with the exhaust gas that has passed through the eliminator 31 to bypass the exhaust gas flow and guide it to the gas outlet 17b.
[0040]
The upper end of the baffle plate 33 is located slightly above the upper end of the gas outlet 17b.
[0041]
In addition, as shown in FIG. 4, a large number of holes 33 a are formed in the lower portion of the baffle plate 33 at intervals in the axial length direction of the outlet side tank portion 25.
[0042]
As shown in FIG. 2, the small diameter hole 33a is formed at a position below the lower end of the gas outlet 17b.
[0043]
A drain board 35 is disposed horizontally below the eliminator 31 in the outlet side tank unit 25.
[0044]
The drain board 35 acts to separate the condensed water W separated by the eliminator 31 from the flow of exhaust gas.
[0045]
As shown in FIG. 2, the drain board 35 is disposed at a position below the tube hole 17a and the gas outlet 17b.
[0046]
A large number of holes 35 a are formed in the drain board 35.
[0047]
A discharge port 17 c for discharging the separated condensed water is formed on the lower surface of the outlet side tank unit 25.
[0048]
A discharge pipe 41 is vertically connected to the discharge port 17c.
[0049]
In this embodiment, the air / water separator 29 is manufactured by brazing the guide plate 37 and the baffle plate 33 of the eliminator 31 to the drain board 35.
[0050]
In the above-described condenser for a fuel cell system, as shown in FIG. 3, the exhaust gas G containing water vapor from the fuel cell flows into the inlet side tank portion 23 from the inlet pipe 27 and passes through the tube 13 and the tank 19. Then, while being led to the outlet side tank unit 25, it is cooled by exchanging heat with the air passing through the core unit 11, the water vapor in the exhaust gas is condensed, and the exhaust gas contains condensed water.
[0051]
Then, as shown in FIGS. 1 and 2, when the exhaust gas G containing condensed water flows out from the tube 13 to the outlet side tank unit 25, the eliminator 31 disposed in the outlet side tank unit 25 causes the tube 13. Exhaust gas that has flowed out into the outlet side tank unit 25 is guided in a zigzag shape in the horizontal direction, whereby the condensed water W is separated from the exhaust gas and dripped downward along the guide plate 37.
[0052]
Further, when the exhaust gas that has passed through the eliminator 31 collides with the baffle plate 33, small water droplets remaining in the exhaust gas without being removed by the eliminator 31 are dripped along the baffle plate 33, so that the condensed water is more reliably generated from the exhaust gas. Separated.
[0053]
The exhaust gas from which the condensed water has been separated is discharged from the outlet pipe 39 into the atmosphere.
[0054]
It should be noted that small water droplets in the exhaust gas flowing out to the outlet pipe 39 side are guided to the drain board 35 side through a hole 33a formed in the lower part of the baffle plate 33.
[0055]
On the other hand, the water droplets of the condensed water dropped on the guide plate 37 of the eliminator 31 and the water droplets of the condensed water dropped on the baffle plate 33 fall down through the hole 35a of the drain board 35 and are separated from the flow of the exhaust gas. And is discharged from the discharge pipe 41 of the discharge port 17c.
[0056]
FIG. 5 schematically shows a pure water recovery system for a fuel cell using the above-described fuel cell system condenser. In this pure water recovery system, the exhaust gas generated in the fuel cell 43 is converted into the fuel cell described above. Guided to system condenser 45.
[0057]
Then, it is cooled by air sucked into the core portion 11 by the cooling fan 47 and becomes exhaust gas containing condensed water, and is separated into condensed water and exhaust gas in the outlet side tank portion 25, and the separated exhaust gas is discharged into the outlet pipe 39. From the atmosphere.
[0058]
On the other hand, the separated condensed water is led from the discharge pipe 41 to the water tank 49 and recovered as pure water.
[0059]
The pure water in the water tank 49 is circulated to the cooler 53 by the water pump 51 and cooled to a predetermined temperature.
[0060]
The pure water in the water tank 49 is supplied to the fuel cell 43 side by the water pump 55, and is used, for example, as humidification for the air supply system and cooling water for the cooling system.
[0061]
In the fuel cell system condenser described above, the steam / water separation means 29 for separating the condensed water from the exhaust gas flowing out from the tube 13 is disposed in the outlet side tank unit 25, and the condensed condensation separated in the outlet side tank unit 25. Since the discharge port 17c for discharging water is provided, the steam separator can be dispensed with.
[0062]
And since the air / water separator is not required, parts such as pipes and brackets attached to the air / water separator can be eliminated, and the space, weight, cost, assembly man-hours, etc. are greatly reduced compared to the conventional one. can do.
[0063]
Further, since it is not necessary to transfer the exhaust gas to the steam separator through the pipe, the condensed water becomes a mist during the transfer and does not evaporate in the exhaust gas, so that the condensed water can be reliably separated from the exhaust gas.
[0064]
In the above-described condenser for a fuel cell system, the exhaust gas flowing out from the tube 13 into the outlet side tank unit 25 is guided in a zigzag manner in the horizontal direction by the eliminator 31, so that the condensed water is reliably separated from the exhaust gas. can do.
[0065]
Further, in the fuel cell system condenser described above, the baffle plate 33 that collides with the exhaust gas that has passed through the eliminator 31 and bypasses the exhaust gas flow to guide the gas to the gas outlet 17b is disposed in the outlet side tank unit 25. The condensed water can be more reliably separated from the exhaust gas.
[0066]
Further, in the above-described condenser for the fuel cell system, the condensed water separated by the eliminator 31 is separated from the flow of the exhaust gas by the drain board 35 and guided to the exhaust port 17c, so that the exhaust gas flows into the exhaust port 17c side. This can be surely prevented.
[0067]
In the above-described condenser for a fuel cell system, the eliminator 31 is arranged at the center of the outlet side tank 25 where the flow velocity of the exhaust gas flowing out from the tube 13 is the lowest. Can be captured most efficiently.
[0068]
That is, the exhaust gas flowing out from the tube 13 is a mixture of condensed water droplets and gas, but when the flow velocity is reduced, the droplets are less efficiently moved by the airflow and fall efficiently, The droplets that collide and adhere to the guide plate 37 also fall efficiently along the guide plate 37 because the airflow velocity is slow.
[0069]
In the fuel cell system condenser described above, the tube 13 is flattened and the outlet side tank portion 25 is cylindrical. Therefore, when the exhaust gas from the tube 13 flows into the outlet side tank portion 25, Increases rapidly and the flow rate of the exhaust gas greatly decreases, so that the droplets of condensed water can be dropped more efficiently.
[0070]
6 and 7 show a second embodiment of the fuel cell system condenser of the present invention. In this embodiment, the eliminator 31A constituting the steam separator 29A is connected to the outlet side tank from the tube 13. FIG. It comprises a plurality of guide plates 57 and 59 that flow the exhaust gas flowing into the section 25 in a vertical direction.
[0071]
That is, a plurality of guide plates 57 and 59 are arranged in the outlet side tank portion 25 at intervals in the radial direction of the outlet side tank portion 25.
[0072]
The guide plates 57 and 59 are vertically arranged in the outlet side tank portion 25, and the lower ends of the adjacent guide plates 57 are in contact with the drain board 35.
[0073]
As shown in FIG. 8, the other guide plate 59 is formed with a protrusion 59 a at the lower end of the guide plate 59, and the lower end of the protrusion 59 a is in contact with the drain board 35.
[0074]
Therefore, a gap 59b is formed between the drain board 35 and the guide plate 59 as shown in FIG.
[0075]
The upper end of the guide plate 59 is in contact with the inner surface of the outlet side tank portion 25.
[0076]
The interval W1 between the guide plates 57 and 59 for guiding the exhaust gas upward is set wider than the interval W2 between the guide plates 57 and 59 for guiding the exhaust gas downward.
[0077]
The air / water separation means 29A is manufactured by brazing the guide plates 57 and 59 of the eliminator 31A and the baffle plate 33 to the drain board 35.
[0078]
In this embodiment, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0079]
In the fuel cell system condenser of this embodiment, the exhaust gas flowing out from the tube 13 into the outlet side tank portion 25 is caused to flow in the vertical direction by the guide plates 57 and 59 of the eliminator 31A. Condensate is separated from the water.
[0080]
Since the interval W1 between the guide plates 57 and 59 for guiding the exhaust gas upward is wider than the interval W2 between the guide plates 57 and 59 for guiding the exhaust gas downward, the flow rate when the exhaust gas rises is higher than the flow rate when the exhaust gas descends. This slows down, thereby preventing the condensate droplets from rising and facilitating the drop.
[0081]
In this embodiment, the same effect as that of the first embodiment can be obtained. However, in this embodiment, it is possible to easily lengthen the passage of the exhaust gas flowing through the eliminator 31A, thereby further improving the steam-water separation performance. Can be improved.
[0082]
Further, in this embodiment, the interval W1 between the guide plates 57 and 59 for guiding the exhaust gas upward is made larger than the interval W2 between the guide plates 57 and 59 for guiding the exhaust gas downward, so that the condensed water droplets rise. It is possible to prevent the liquid droplet from descending, and to more reliably separate the condensed water from the exhaust gas.
[0083]
9 to 16 show an embodiment in which the condenser for a fuel cell system according to the present invention is arranged vertically, and the third embodiment shown in FIGS. 9 to 12 is the same as in the first and second embodiments. The core portion 11 is arranged vertically with one tank 17 on the lower side and the other tank 19 on the upper side.
[0084]
A steam / water separation means 29 for separating the condensed water from the exhaust gas flowing downward from the tube 13 is disposed in the outlet side tank portion 25 of the one tank 17.
[0085]
As in the first embodiment, the air / water separation means 29 is configured by arranging a number of dog-shaped guide plates 37 in parallel in the axial length direction of the outlet side tank portion 25 at intervals. An eliminator 31, a baffle plate 33, and a drain board 35 are provided, and each guide plate 37 is disposed vertically at the approximate center of the outlet side tank portion 25 as shown in FIG. 10.
[0086]
The gas outlet 17 b and the outlet pipe 39 are provided on one side surface of the outlet side tank portion 25, and a baffle plate 33 is vertically disposed between the gas outlet 17 b and the eliminator 31.
[0087]
As in the above embodiments, the baffle plate 33 has an upper end positioned slightly above the upper end of the gas outlet 17b and a lower portion below the lower end of the gas outlet 17b. A large number of small-diameter holes 33a are formed at intervals in the axial length direction.
[0088]
Above the outlet side tank section 25, a deflecting plate 61 for deflecting the exhaust gas flowing out from the upper tube 13 toward the side of the eliminator 31 on the side opposite to the gas outlet 17b is provided obliquely. Yes.
[0089]
The upper end of the eliminator 31 is in contact with the lower surface of the deflection plate 61.
[0090]
In addition, a drain board 35 having a large number of holes 35 a is disposed below the eliminator 31 in the outlet side tank unit 25, and the condensed water is discharged to the lower surface of the outlet side tank unit 25. The discharge port 17c and the discharge pipe 41 are provided in the same manner as in the first and second embodiments, but are deflected by the deflection plate 61 on the side of the eliminator 31 in the outlet side tank unit 25. A drain board 62 having a large number of holes 62a is also disposed at a position where the exhaust gas is blown.
[0091]
This drain board 62 is curved and formed with the same curvature as the peripheral wall of the outlet side tank unit 25, and the lower end is joined to one side end part of the drain board 35, with an appropriate distance from the inner surface of the outlet side tank unit 25. It is placed and placed.
[0092]
In the above-described condenser for a fuel cell system, as shown in FIG. 11, the exhaust gas G containing water vapor from the fuel cell flows into the inlet side tank unit 23 from the inlet pipe 27, and the vertical tube 13 and the upper side While being led to the outlet side tank part 25 through the tank 19, it is cooled by exchanging heat with the air passing through the core part 11, and the water vapor in the exhaust gas is condensed to become exhaust gas containing condensed water.
[0093]
Then, as shown in FIGS. 9 and 10, when the exhaust gas G containing condensed water flows out from the tube 13 to the outlet tank 25, it is deflected to one side of the eliminator 31 by the deflection plate 61, and this eliminator The exhaust gas deflected by 31 is guided in a zigzag shape in the horizontal direction, whereby the condensed water W is separated from the exhaust gas and dripped downward along the guide plate 37.
[0094]
Further, when the exhaust gas that has passed through the eliminator 31 collides with the baffle plate 33, small water droplets remaining in the exhaust gas without being removed by the eliminator 31 are dripped along the baffle plate 33, so that the condensed water is more reliably generated from the exhaust gas. Separated.
[0095]
The exhaust gas from which the condensed water has been separated is discharged from the outlet pipe 39 into the atmosphere.
[0096]
It should be noted that small water droplets in the exhaust gas flowing out to the outlet pipe 39 side are guided to the drain board 35 side from a hole 33a formed in the lower part of the baffle plate 33.
[0097]
Here, the condensed water W is also separated from the exhaust gas when the exhaust gas deflected by the deflecting plate 61 collides with the drain board 62.
[0098]
The water droplets of the condensed water dripped downward through the hole 62a of the drain board 62 and the water droplets of the condensed water dropped on the guide plate 37 and the baffle plate 33 of the eliminator 31 pass through the hole 35a of the drain board 35. And is separated from the flow of the exhaust gas and discharged from the discharge pipe 41 of the discharge port 17c.
[0099]
FIG. 12 schematically shows a pure water recovery system for a fuel cell using the above-described fuel cell system condenser 45. The fuel cell system condenser 45 has the outlet side tank portion 25 on the lower side. The second embodiment is the same as that of the first embodiment shown in FIG.
[0100]
FIG. 13 shows a fourth embodiment of the present invention. In this embodiment, the eliminator 31 and the deflection plate 61 in the third embodiment are spaced from each other at a central position in the outlet side tank unit 25. And a pair of baffle plates 33, gas outlets 17b and outlet pipes 39 are provided symmetrically in the left-right direction.
[0101]
The deflecting plates 61 and 61 are inclined and arranged downward on the center side of the outlet side tank unit 25 so that the exhaust gas flowing out from the tube 13 can be deflected and guided between the two eliminators 31 and 31.
[0102]
Therefore, in the fourth embodiment, the exhaust gas that flows out from the tube 13 and is deflected and guided between the eliminators 31 and 31 by the deflecting plates 61 and 61 is separated into gas and water through the eliminators 31 and 31, and the condensed water is discharged. The separated exhaust gas is discharged to the atmosphere from the left and right outlet pipes 39, 39, and the separated condensed water is discharged from the discharge pipe 41 through the drain board 35.
[0103]
14 and 15 show a fifth embodiment of the present invention. In this embodiment, instead of the eliminator 31 in the third embodiment, the second embodiment shown in FIGS. Similarly, the eliminator 31A is configured by a plurality of guide plates 57 and 59 that flow the exhaust gas flowing out from the tube 13 into the outlet side tank portion 25 while changing the direction in the vertical direction.
[0104]
One guide plate 57 has a lower end in contact with the drain board 35 and an upper end disposed near the lower surface of the deflection plate 61.
[0105]
The other guide plate 59 is formed with a protruding portion 59a at the lower end in the same manner as shown in FIG. 8, and the lower end of the protruding portion 59a is brought into contact with the drain board 35 so that the drain board 35 and the guide plate 59 are not in contact with each other. The guide plate 59 is in contact with the lower surface of the deflection plate 61.
[0106]
The front end portion 61a of the deflection plate 61 is formed to be bent substantially vertically downward, and a gas flow path is formed between the front end portion 61a, the drain board 62, and the guide plate 59, respectively.
[0107]
Therefore, in this embodiment, the tip portion 61a of the deflecting plate 61 and the baffle plate 33 also have a function as a guide plate.
[0108]
Also in this embodiment, the interval W1 between the guide plates 61a, 57 that guide the exhaust gas upward and the guide plates 59, 33 are wider than the interval W2 of the guide plates 57, 59 that guide the exhaust gas downward.
[0109]
In the fifth embodiment, the exhaust gas flowing out from the tube 13 into the outlet side tank unit 25 is deflected by the deflection plate 61 toward the drain board 62 on the one side in the outlet side tank unit 25, and the guide plate of the eliminator 31A. 61a, 57, 59 causes the exhaust gas to flow in a vertical direction, whereby the condensed water is separated from the exhaust gas, and the same effect as in the second embodiment can be obtained.
[0110]
FIG. 16 shows a sixth embodiment of the present invention. In this embodiment, the eliminator 31A and the deflecting plate 61 in the fifth embodiment are spaced apart from each other at a central position in the outlet side tank unit 25. FIG. And a pair of baffle plates 33, gas outlets 17b and outlet pipes 39 are provided symmetrically in the left-right direction.
[0111]
The deflecting plates 61 and 61 are inclined and arranged downward on the center side of the outlet side tank unit 25 so that the exhaust gas flowing out from the tube 13 can be deflected and guided between the two eliminators 31 and 31.
[0112]
Therefore, in the sixth embodiment, the exhaust gas that flows out from the tube 13 and is deflected and guided between the eliminators 31 and 31 by the deflecting plates 61 and 61 is separated into air and water through the eliminators 31 and 31, and the condensed water is discharged. The separated exhaust gas is discharged to the atmosphere from the left and right outlet pipes 39, 39, and the separated condensed water is discharged from the discharge pipe 41 through the drain board 35.
[0113]
In each of the embodiments described above, an example in which one tank 17 is partitioned by a partition plate and the inlet side tank portion 23 and the outlet side tank portion 25 are formed has been described, but the present invention is limited to such an embodiment. Instead, for example, the inlet side tank portion may be formed in one tank and the outlet side tank portion may be formed in the other tank.
[0114]
In the above-described embodiment, the example in which the exhaust gas in the inlet side tank portion 23 is turned once and led to the outlet side tank portion 25 has been described. However, the present invention is not limited to such an embodiment, You may comprise so that it may turn.
[0115]
Further, in the above-described embodiment, the example in which the tube 13, the tanks 17 and 19, the eliminators 31, 31A, the baffle plate 33, the drain board 35, and the like are formed of stainless steel has been described. However, the present invention is limited to such an embodiment. For example, it may be formed of aluminum, resin, or the like.
[0116]
【The invention's effect】
As described above, in the condenser for a fuel cell system according to claim 1, the steam / water separation means for separating the condensed water from the exhaust gas flowing out from the tube is disposed in the outlet side tank portion, and the separation is performed in the outlet side tank portion. Since the outlet for discharging the condensed water is provided, the steam separator can be dispensed with.
[0117]
In the fuel cell system condenser according to claim 2, the exhaust gas flowing out from the tube into the outlet side tank portion is guided in a zigzag shape in the horizontal direction by the eliminator, so that the condensed water can be reliably separated from the exhaust gas. .
[0118]
In the condenser for a fuel cell system according to claim 3, the exhaust gas flowing out from the tube into the outlet side tank portion is made to flow in the vertical direction by the guide plate of the eliminator, so that the condensed water is reliably separated from the exhaust gas. can do.
[0119]
And since the interval between the guide plates that guide the exhaust gas upward is wider than the interval between the guide plates that guide the exhaust gas downward, it is possible to prevent the condensate water droplets from rising and promote the liquid droplets to descend. Thus, the condensed water can be more reliably separated from the exhaust gas.
[0120]
In the fuel cell system condenser according to claim 4, the baffle plate that collides with the exhaust gas that has passed through the eliminator and bypasses the exhaust gas flow to guide the gas outlet is disposed in the outlet side tank portion. Separation can be performed more reliably.
[0121]
In the fuel cell system condenser according to claim 5, since the condensed water separated by the eliminator is separated from the flow of the exhaust gas by the drain board and guided to the discharge port, it is ensured that the exhaust gas flows into the discharge port side. Can be prevented.
[Brief description of the drawings]
1 is a cross-sectional view showing details of an outlet side tank section and a steam / water separation means in FIG. 3;
2 is a cross-sectional view showing details of an outlet side tank section and a steam / water separation means in FIG. 3; FIG.
FIG. 3 is a cross-sectional view showing a first embodiment of a condenser for a fuel cell system of the present invention.
4 is a front view showing details of the baffle plate of FIG. 1; FIG.
5 is an explanatory diagram showing a state in which the fuel cell system condenser of FIG. 3 is arranged in a pure water recovery system of a fuel cell. FIG.
FIG. 6 is a cross-sectional view showing a main part of a second embodiment of the fuel cell system condenser of the present invention.
7 is a cross-sectional view of FIG. 6. FIG.
FIG. 8 is a front view showing details of the guide plate of FIG. 6;
9 is a longitudinal sectional view showing details of the outlet side tank section and the steam / water separation means of FIG. 11. FIG.
10 is a longitudinal sectional view showing details of the outlet side tank section and the steam / water separation means of FIG. 9. FIG.
FIG. 11 is a cross-sectional view showing a third embodiment of a fuel cell system condenser of the present invention.
12 is an explanatory diagram showing a state in which the fuel cell system condenser of FIG. 11 is arranged in a pure water recovery system of a fuel cell. FIG.
FIG. 13 is a longitudinal sectional view showing a main part of a fourth embodiment of a fuel cell system condenser of the present invention.
FIG. 14 is a longitudinal sectional view showing details of an outlet side tank section and air-water separation means in a fifth embodiment of a condenser for a fuel cell system of the present invention.
15 is a longitudinal sectional view showing details of the outlet side tank section and the steam / water separation means of FIG. 14;
FIG. 16 is a cross-sectional view similar to FIG. 15, showing a sixth embodiment of a condenser for a fuel cell system of the present invention.
FIG. 17 is an explanatory view showing a conventional pure water recovery system for a fuel cell.
[Explanation of symbols]
11 ... Core part
13 ... Tube
15 ... corrugated fin
17, 19 ... Tank
17b ... Gas outlet
17c ... Discharge port
23 ... Inlet side tank
25 ... Exit side tank
27 ... Inlet pipe
29, 29A ... Air-water separation means
31, 31A ... Eliminator
33 ... Baffle plate
35 ... Drain board
37, 57, 59… Guide board

Claims (5)

Tanks (17, 19) communicating with the tube (13) are arranged on both sides of the core (11) in which the tubes (13) and fins (15) are alternately stacked, and from the gas inlet (27). The exhaust gas containing water vapor from the fuel cell (43) flowing into the inlet side tank part (23) is led to the outlet side tank part (25) via the tube (13), and the outlet side tank part (25) In the condenser for a fuel cell system for discharging the exhaust gas from the gas outlet (17b),
In the outlet side tank part (25), there is disposed a steam / water separation means (29, 29A) for separating condensed water from the exhaust gas flowing out from the tube (13), and in the outlet side tank part (25), A fuel cell system condenser comprising a discharge port (17c) for discharging the separated condensed water. The condenser for a fuel cell system according to claim 1,
The steam / water separation means (29) has an eliminator (31) for guiding the exhaust gas flowing out from the tube (13) into the outlet side tank (25) in a zigzag shape in the horizontal direction. Condenser for fuel cell system. The condenser for a fuel cell system according to claim 1,
The steam / water separation means (29A) includes a plurality of guide plates (57, 59) for flowing the exhaust gas flowing out from the tube (13) into the outlet side tank portion (25) in a vertical direction. The gap (W1) between the guide plates (57, 59) having an eliminator (31A) and guiding the exhaust gas upward is wider than the interval (W2) between the guide plates (57, 59) guiding the exhaust gas downward. A condenser for a fuel cell system. The condenser for a fuel cell system according to claim 2 or 3,
The steam-water separation means (29, 29A) has a baffle plate (33) that collides with the exhaust gas that has passed through the eliminator (31, 31A), bypasses the flow of the exhaust gas, and guides it to the gas outlet (17b). A condenser for a fuel cell system. The fuel cell system condenser according to any one of claims 2 to 4,
The steam-water separation means (29, 29A) has a drain board (35) for separating the condensed water separated by the eliminator (31, 31A) from the exhaust gas flow. Condenser for battery system.

Images