JP6972718B2 - Water purifier and fuel cell system - Google Patents

Description

The present invention relates to a water purifier and a fuel cell system.

Conventionally, this type of fuel cell system includes a reformer that reforms raw fuel gas with water to generate hydrogen-containing gas, and a fuel cell that generates power using hydrogen-containing gas and oxidant gas. A hot water storage tank that stores hot water heated by heat exchange between the fuel cell module and the combustion exhaust gas generated from the fuel cell module, a water supply unit that supplies water to the fuel cell module, and air to the fuel cell module. An air supply unit, a gas supply unit that supplies raw fuel gas to the fuel cell module, and a water purifier (purification) that purifies the water condensed from the water vapor in the combustion exhaust gas and stored in the water supply unit with an ion exchange resin. It has been proposed that a vessel is provided in the same housing (see, for example, Patent Document 1). In this fuel cell system, the fuel cell module is arranged at the uppermost part of the housing, the hot water storage tank is arranged under the fuel cell module, and the water purifier is arranged at the lowermost part of the housing. By arranging a water supply unit, an air supply unit, and a gas supply unit between the hot water storage tank and the water purifier, heat transfer from the hot water storage tank to the water purifier is blocked. This suppresses the thermal deterioration of the ion exchange resin in the water purifier due to the temperature rise of the fuel cell module and the hot water storage tank, and prevents the ion adsorption efficiency from decreasing.

Japanese Unexamined Patent Publication No. 2014-182927

In the fuel cell system described above, the arrangement of the water purifier and each part in the housing is taken into consideration in order to suppress the thermal deterioration of the ion exchange resin, but the water temperature of the water purified by the water purifier is taken into consideration. No. The water purified by the water purifier is condensed from the combustion exhaust gas and may treat relatively high temperature water, which may cause thermal deterioration of the ion exchange resin.

An object of the present invention is to suppress deterioration of an ion exchange resin in a water purifier.

The present invention has taken the following measures to achieve the above-mentioned main object.

The water purifier of the present invention is a water purifier that purifies water condensed by heat exchange, and has a water inlet at the upper part and a water outlet at the lower part, and has a cylindrical side wall. The storage container comprises at least two layers of ion exchange resins, which are filled in the storage container so as to be overlapped with each other and have different types of ion exchange resins or different mixing ratios of a plurality of types of ion exchange resins. The gist is to have a space capable of storing water between the ion exchange resin layer on the uppermost layer and the inflow port.

In the water purifier of the present invention, a storage container having a water inlet at the upper part and a water outlet at the lower part and having a tubular side wall is provided between the uppermost ion exchange resin layer and the inlet. Has a space that can store. Since the ion exchange resin layer of the water purifier has water passage resistance, it takes time for the water treated by the ion exchange resin layer to pass through. Therefore, the water stored in the space between the uppermost ion exchange resin layer and the inlet is cooled at the ambient temperature until it flows into the ion exchange resin layer, and is therefore condensed by heat exchange. It is possible to prevent water having a relatively high temperature from directly reaching the ion exchange resin layer and suppress thermal deterioration of the ion exchange resin layer. Further, since the head pressure of the water stored in the space acts on the upper surface of the ion exchange resin layer, it is possible to suppress the variation in the amount of water flow per unit area in the cross section of the ion exchange resin layer. It is possible to suppress the bias of water flow and effectively utilize the ion exchange resin. From these facts, it is possible to suppress the deterioration of the ion exchange resin in the water purifier and improve the effective utilization rate of the ion exchange resin.

In the water purifier of the present invention, a flow path is formed which is arranged in the space and in which water flowing from the inlet flows to the ion exchange resin layer on the uppermost layer, and a throttle for narrowing the flow rate of the flow path is formed. It may be provided with a spacer. By doing so, the time until the water flowing in from the inflow port reaches the ion exchange resin layer through the flow path in the spacer can be lengthened and the water temperature can be lowered, so that the thermal deterioration of the ion exchange resin layer is further improved. It can be suppressed. In addition, even if the water purifier falls sideways during transportation, the ion exchange resin from the upper ion exchange resin layer can be prevented from entering the space, and the ion exchange resin of each ion exchange resin layer can be mixed. Since it can be suppressed, the ion exchange efficiency can be appropriately exhibited.

In the water purifier of the present invention, the spacer may be formed so that the center of the throttle is deviated from the center of the inflow port in the top view. By doing so, it is possible to prevent the relatively high temperature water flowing in from the inflow port from directly reaching the ion exchange resin layer even when the water is not sufficiently stored in the space. Therefore, the ion exchange resin layer can be prevented. The thermal deterioration of the above can be further suppressed.

In the water purifier of the present invention, the ion exchange resin layer may be formed of an ion exchange resin having a specific density higher than that of water, and the spacer may be formed of a material having a specific gravity lower than that of water. By doing so, it is possible to prevent the spacer from being buried in the ion exchange resin layer or the ion exchange resin in the upper ion exchange resin layer from flowing into the spacer due to the aged use of the water purifier. The exchange efficiency can be maintained appropriately.

In the water purifier of the present invention, the uppermost ion exchange resin layer is formed only of a cationic resin, and the other ion exchange resin layers contain at least an anionic resin having a lower heat resistance than the cationic resin. It may be formed. By doing so, it is possible to increase the heat resistance of the uppermost ion exchange resin layer to which relatively high temperature water reaches, and the water whose temperature has dropped while passing through the uppermost ion exchange resin layer can be used as another water. It will pass through the ion exchange resin layer. Therefore, the thermal deterioration of each layer of the ion exchange resin layer can be further suppressed.

The fuel cell system of the present invention is a fuel cell system including a fuel cell that generates power based on a reforming gas containing hydrogen and an oxidizing agent gas containing oxygen, and reforms the raw fuel gas to form the reforming gas. A reformer that produces fuel, a water tank that stores water used to generate the reforming gas, and water condensed by heat exchange between the exhaust gas discharged from the fuel cell and the refrigerant are placed in the water tank. The gist is to include a heat exchanger for supplying fuel and any of the above-mentioned water purifiers provided in the water supply path from the heat exchanger to the water tank.

The fuel cell system of the present invention includes a fuel cell, a reformer, a water tank, a heat exchanger, and any of the water purifiers described above. Therefore, as described above, it is possible to prevent the relatively high temperature water condensed by heat exchange from directly reaching the ion exchange resin layer of the water purifier and suppress the thermal deterioration of the ion exchange resin layer. can. In addition, the head pressure of the water stored in the space of the water purifier can suppress the bias of water flow in the ion exchange resin layer. From these facts, since the deterioration of the ion exchange resin in the water purifier can be suppressed, the maintenance man-hours of the fuel cell system can be reduced, the life can be extended, and the cost can be reduced.

In the fuel cell system of the present invention, the fuel cell, the reformer, the water tank, the heat exchanger, and the water purifier are provided with a housing for accommodating the fuel cell, the reformer, the water tank, the heat exchanger, and the water purifier. The heat exchanger is provided at a position away from the bottom of the housing, the water tank is provided at the bottom of the housing, and the water purifier is provided in the vicinity of the water tank. May be good. By doing so, the water purifier can be arranged at a place in the housing where the atmospheric temperature is relatively low, so that the thermal deterioration of the water purifier can be further suppressed.

It is a block diagram which shows the outline of the structure of the fuel cell system 10. It is a block diagram which shows the outline of the structure of the water purifier 60. It is explanatory drawing which shows the state of the flow of water in a water purifier 60. It is explanatory drawing which shows the state of progress of deterioration in a water purifier 60.

Next, a mode for carrying out the present invention will be described.

FIG. 1 is a configuration diagram showing an outline of the configuration of the fuel cell system 10, and FIG. 2 is a configuration diagram showing an outline of the configuration of the water purifier 60. As shown in FIG. 1, the fuel cell system 10 includes a power generation unit 20 that generates power, a hot water storage tank 70 that stores hot water heated by heat from the power generation unit 20, a control device 80 that controls the entire system, and the like. , These are housed in a rectangular fuel cell case 12. The fuel cell system 10 can supply the electric power generated by the power generation unit 20 to a household household appliance or the like (not shown), and can supply the hot water stored in the hot water storage tank 70 to a bathtub or the like of a house (not shown). ..

As shown in FIG. 1, the power generation unit 20 includes a power generation module 30, a raw fuel gas supply device 40, an air supply device 45, a reformed water supply device 50, and an exhaust heat recovery device 55.

The power generation module 30 includes a vaporizer 32 that vaporizes reformed water to generate steam, a reformer 34 that reforms raw fuel gas such as natural gas and LP gas by steam reforming, and reformed gas and oxidation. It has a fuel cell stack 36 or the like that generates power by being supplied with an agent gas. The vaporizer 32, the reformer 34, and the fuel cell stack 36 are housed in a box-shaped module case 31 made of a heat insulating material. In the module case 31, the fuel that has passed through the fuel cell stack 36 to start the fuel cell stack 36, generate steam in the vaporizer 32, and supply heat required for the steam reforming reaction in the reformer 34. A combustion unit 38 for burning off-gas (anode off-gas) and oxidant off-gas (cathode off-gas) is provided.

The raw fuel gas supply device 40 has a raw fuel gas supply pipe 41 that connects the gas supply source 1 and the vaporizer 32. The raw fuel gas supply pipe 41 is provided with a gas supply valve 42, a gas pump 43, a desulfurizer (not shown), and the like in order from the gas supply source 1 side, and drives the gas pump 43 with the gas supply valve 42 opened. By doing so, the raw material and fuel gas from the gas supply source 1 is desulfurized and supplied to the vaporizer 32.

The air supply device 45 has an air supply pipe 46 that connects the filter 47 that communicates with the outside air and the fuel cell stack 36. The air supply pipe 46 is provided with an air blower 48, and by driving the air blower 48, air sucked through the filter 47 is supplied to the fuel cell stack 36.

The reforming water supply device 50 has a reforming water supply pipe 51 that connects the reforming water tank 52 for storing the reforming water and the vaporizer 32. The reforming water supply pipe 51 is provided with a reforming water pump 53, and by driving the reforming water pump 53, the reforming water in the reforming water tank 52 is supplied to the vaporizer 32. The reformed water tank 52 is arranged at the bottom of the fuel cell case 12. The power generation module 30 (reformer 34, fuel cell stack 36), exhaust heat recovery device 55 (heat exchanger 57), and hot water storage tank 70 are separated from the bottom such as the upper part and the central part in the fuel cell case 12. It is placed in a position. Therefore, the reforming water tank 52 is located away from the power generation module 30, the waste heat recovery device 55, and the hot water storage tank 70.

The exhaust heat recovery device 55 exchanges heat between the circulation pipe 56 that circulates the hot water stored in the hot water storage tank 70 by driving the circulation pump 56a, the hot water stored in the circulation pipe 56, and the combustion exhaust gas from the combustion unit 38. It has a heat exchanger 57. The steam component of the combustion exhaust gas from the combustion unit 38 is condensed by heat exchange, and the condensed water (condensed water) is recovered in the reforming water tank 52 via the condensed water supply pipe 58. A water purifier 60 is provided in the condensed water supply pipe 58, and the water purified (purified) by the water purifier 60 is collected in the reformed water tank 52. Further, the remaining exhaust gas (gas component) is discharged to the outside air through the exhaust gas discharge pipe 59.

The water purifier 60 is arranged so as to be adjacent to the reformed water tank 52 arranged at the bottom of the fuel cell case 12. As shown in FIG. 2, the water purifier 60 has a cylindrical storage container 61 in which an ion exchange resin layer 65 is formed as a water purification material, and an outer diameter larger than that of the storage container 61 at the upper part of the storage container 61. 62, an inflow port 63 provided at a position eccentric from the center of the flange portion 62 on the upper surface of the flange portion 62, and an outflow port 64 provided at the center of the bottom of the storage container 61. .. In the water purifier 60, the water flowing in from the upper inflow port 63 passes through the ion exchange resin layer 65 and flows out from the lower outflow port 64, so that impurities contained in the water are adsorbed and removed by the ion exchange resin layer 65. To purify. The outlet 64 does not have to be the center of the bottom portion, and may be formed on the side surface of the lower end portion of the storage container 61.

Further, the water purifier 60 has two resin layers as the ion exchange resin layer 65, the upper resin layer 65a and the lower resin layer 65b having different mixing ratios of the cation exchange resin and the anion exchange resin. The upper resin layer 65a has a higher mixing ratio of the cation resin as the cation exchange resin than the lower resin layer 65b, and the cation resin is 100% in the present embodiment. The lower resin layer 65b has a higher mixing ratio of the anion resin as an anion exchange resin than the upper resin layer 65a, and in the present embodiment, the mixing ratio of the cationic resin and the anion resin is approximately 1: 1 to approximately 2. : It is about 3. The cationic resin has higher heat resistance than the anionic resin. For example, the heat resistant temperature of the anionic resin is about 60 ° C., whereas that of the cationic resin is about 120 ° C. Therefore, the upper resin layer 65a has higher heat resistance than the lower resin layer 65b. Further, the ratio of the thicknesses of the upper resin layer 65a and the lower resin layer 65b may be appropriately determined so as to secure the required amount of the cationic resin and the anionic resin, and in the present embodiment, it is approximately 1: 4 to approximately 1: 1. It is about 6. Here, in the water purifier 60, a space 61a having a predetermined height is formed in the upper part of the upper resin layer 65a in the storage container 61. The predetermined height of the space 61a is about several tens of mm, and can be about 30 mm as an example. The cationic resin and the anionic resin have different specific densities, and the cationic resin has a slightly higher specific density than the anionic resin, and both have a higher specific density than water. Therefore, even if the storage container 61 has a space 61a at the upper portion, when water (condensed water) flows into the storage container 61, the resin particles of the cationic resin or the anionic resin flow into the space 61a so as to float. There is little to do.

Further, in the water purifier 60, the spacer 66 is arranged in the space 61a. The spacer 66 is a resin member in which a flow path penetrating in the vertical direction is formed inside. The spacer 66 is formed in the same manner as the inverted conical portion 66a and the inverted conical portion 66a formed in a substantially inverted conical shape so that the diameter (inner diameter and outer diameter) becomes smaller from the upper side to the lower side. It is composed of a substantially conical conical portion 66b that is inverted upside down and a substantially cylindrical cylindrical portion 66c that connects the lower end of the inverted conical portion 66a and the upper end of the conical portion 66b. Therefore, the cross-sectional area of the flow path of the spacer 66 gradually decreases as it goes downward in the inverted conical portion 66a, becomes the minimum area in the cylindrical portion 66c, and gradually increases as it goes downward in the conical portion 66b. Become. That is, the spacer 66 is formed in an hourglass shape having a diaphragm at the center in the height direction. The inner diameter of the cylindrical portion 66c, that is, the minimum area of the flow path of the spacer 66 can be set to a size required for upwardly removing the gas generated by the treatment in the ion exchange resin layer 65. Further, the shape of the bottom of the cone of the inverted conical portion 66a and the conical portion 66b is a non-circular shape in which the outer peripheral edge is partially cut out in a straight line (for example, at four points spaced 90 degrees in the circumferential direction). In the state of being arranged in the space 61a, a slight gap is formed between the container 61 and the circular inner wall surface of the storage container 61. Further, the spacer 66 is formed of a material having a specific gravity smaller than that of water, for example, a resin material such as polypropylene resin or polyethylene resin.

Here, FIG. 3 is an explanatory diagram showing a state of water flow in the water purifier 60, and FIG. 4 is an explanatory diagram showing a state of progress of deterioration in the water purifier 60. As shown in FIG. 3, the water (condensed water) that has flowed into the storage container 61 from the condensed water supply pipe 58 through the inflow port 63 reaches the upper resin layer 65a through the flow path in the spacer 66. Since the spacer 66 has a throttle in the central portion in the height direction, the water flowing into the storage container 61 is stored in the inverted conical portion 66a, and passes through the cylindrical portion 66c in the conical portion 66b in the radial direction. It flows so as to spread over the entire surface and reaches the entire upper surface of the ion exchange resin layer 65 (upper resin layer 65a). Further, water flows into the space 61a through a gap between the upper and lower ends of the spacer 66 and the inner wall of the storage container 61 and is stored. In this way, in a state where water is stored in the space 61a including the inside of the spacer 66, the water passes through the ion exchange resin layer 65 (the upper resin layer 65a and the lower resin layer 65b). Therefore, since the head pressure of the water stored in the space 61a acts substantially evenly on the upper surface of the ion exchange resin layer 65, the amount of water flow per unit area in the cross section of the ion exchange resin layer 65 varies (biased). It can be suppressed. As a result, it is possible to prevent the water flow of the ion exchange resin layer 65 from being biased, so that the water flow is less biased and deterioration appears evenly as shown in FIG. 4 (see the dotted line in FIG. 4). .. As a result, it is possible to prevent the utilization efficiency of the ion exchange resin from being lowered due to the biased deterioration.

Further, as described above, the inflow port 63 is provided at a position eccentric from the center of the flange portion 62, and water flows from a position deviated from the center of the cylindrical portion 66c of the spacer 66 (center of the diaphragm) in view of the upper surface. Inflow. Therefore, even in a state where almost no water is stored in the spacer 66, it is possible to prevent the water flowing into the storage container 61 from directly reaching the ion exchange resin layer 65 (upper resin layer 65a). Further, since the water flowing into the space 61a from the edges of the upper and lower ends of the spacer 66 stays in the space 61a, it is cooled by the atmospheric temperature during that time and the water temperature drops. Therefore, the spacer 66 is surrounded by water whose water temperature has decreased, and the effect of cooling the water while passing through the flow path in the spacer 66 can be enhanced. From these facts as well, it is possible to prevent the relatively high temperature water (condensed water) flowing into the storage container 61 from directly reaching the upper resin layer 65a and suppress thermal deterioration. Of course, in the present embodiment, the upper resin layer 65a contains only the cation resin having high heat resistance, and the anion resin having low heat resistance is contained only in the lower resin layer 65b, and the heat resistance of the upper resin layer 65a is defined as the lower resin. Since it is higher than the layer 65b, the thermal deterioration of the entire ion exchange resin layer 65 can be further suppressed. Further, since the water purifier 61 is arranged adjacent to the reformed water tank 52 arranged at the bottom of the fuel cell case 12 and is separated from the power generation module 30, the exhaust heat recovery device 55, and the hot water storage tank 70, water purification is performed. It is possible to prevent the vessel 61 from being exposed to a high temperature atmosphere and further suppress the thermal deterioration of the ion exchange resin layer 65.

The water purifier 60 of the embodiment described above has a space 61a in which the storage container 61 can store water between the inflow port 63 and the upper resin layer 65a, and the condensed water flowing in from the inflow port 63. Since the water temperature can be lowered by the water stored in the space 61a, the thermal deterioration of the ion exchange resin layer 65 can be suppressed. Further, it is possible to suppress the variation in the amount of water flow per unit area in the cross section of the ion exchange resin layer 65 due to the head pressure of the water stored in the space 61a, and to suppress the deterioration of the ion exchange resin layer 65 from being biased.

Further, in the water purifier 60, since the spacer 66 having a throttle is arranged in the space 61a and the water can be cooled while passing through the spacer 66, the thermal deterioration of the ion exchange resin layer 65 can be further suppressed. can. Further, the water accumulated around the spacer 66 can efficiently cool the water passing through the spacer 66. Further, even if the water purifier 60 falls sideways during transportation, the spacer 66 can prevent the ion exchange resin from entering the space 61a. Therefore, it is possible to appropriately exhibit the ion exchange efficiency by suppressing the ion exchange resins of the upper resin layer 65a and the lower resin layer 65b from being mixed with each other.

Further, in the water purifier 60, the center of the throttle (cylindrical portion 66c) of the spacer 66 is located at a position deviated from the center of the inflow port 63 in the top view, so that water is sufficiently stored in the space 61a. It is possible to prevent the water flowing in from the inflow port 63 from directly reaching the ion exchange resin layer 65 (upper resin layer 65a) even in the absence state, and to suppress the thermal deterioration of the ion exchange resin layer 65.

Further, in the water purifier 60, the upper resin layer 65a and the lower resin layer 65b are both formed of an ion exchange resin having a higher specific gravity than water, and the spacer 66 is formed of a material having a lower specific density than water. Therefore, by using the water purifier 60 over time, it is possible to prevent the spacer 66 from being buried in the ion exchange resin layer 65 and the ion exchange resin of the ion exchange resin layer 65 from flowing into the spacer 66, thereby suppressing ions. The exchange efficiency can be maintained appropriately.

Further, in the water purifier 60, the upper resin layer 65a is formed only of a cationic resin having high heat resistance, and the lower resin layer 65b is formed by mixing a cationic resin and an anionic resin. Therefore, the heat resistance of the upper resin layer 65a for purifying relatively high temperature water can be enhanced, and the thermal deterioration of the upper resin layer 65a can be suppressed. Further, since the temperature of water drops while passing through the upper resin layer 65a, the lower resin layer 65b having low heat resistance suppresses the purification of high-temperature water, and the heat deterioration of the lower resin layer 65b is prevented. It can be suppressed.

Further, since the water purifier 60 is arranged at the bottom of the fuel cell case 12 so as to be away from the power generation module 30 (fuel cell stack 36) and the hot water storage tank 70, the water purifier 60 is prevented from being exposed to a high temperature atmosphere. Therefore, the thermal deterioration of the ion exchange resin layer 65 can be further suppressed.

In the above-described embodiment, the center of the throttle of the spacer 66 (the center of the cylindrical portion 66c) and the center of the inlet 63 are deviated from each other, but the present invention is not limited to this, and the center of the throttle and the center of the inlet 63 are not limited to this. May match.

In the embodiment, the spacer 66 is provided in the space 61a, but the present invention is not limited to this, and the spacer 66 may not be provided. Even in this way, when the water flowing in from the inflow port 63 is stored in the space 61a, the water temperature of the water flowing in thereafter can be lowered by the stored water, so that the heat deterioration of the ion exchange resin layer 65 Can be suppressed. Further, it is possible to suppress the variation in the amount of water flow due to the head pressure of the water stored in the space 61a, and to suppress the deterioration of the ion exchange resin layer 65 from being biased.

In the embodiment, the specific gravity of the ion exchange resin of the ion exchange resin layer 65 is larger than that of water, but the present invention is not limited to this, and the specific gravity of the ion exchange resin may be smaller than that of water. In that case, as a member for preventing the inflow of the ion exchange resin into the spacer 66, for example, a mesh member for preventing the inflow may be attached to the lower end of the conical portion 66b of the spacer 66.

In the embodiment, the spacer 66 is formed of a member having a specific density lower than that of water, but the present invention is not limited to this, and the spacer 66 may be formed of a material having a specific gravity higher than that of water. In that case, in order to prevent the spacer 66 from being buried in the ion exchange resin layer 65, a protrusion (positioning portion) for positioning the lower end position of the spacer 66 may be provided on the inner wall surface of the storage container 61.

In the embodiment, the upper resin layer 65a is composed of 100% cationic resin, but the present invention is not limited to this, and the upper resin layer 65a may be composed of a cationic resin and an anionic resin. In that case, the mixing ratio of the cationic resin may be higher than that of the lower resin layer 65b. Further, the lower resin layer 65b is composed of a cationic resin and an anionic resin, but the present invention is not limited to this, and the lower resin layer 65b may be composed of 100% anionic resin.

In the embodiment, the ion exchange resin layer 65 is composed of two layers, an upper resin layer 65a and a lower resin layer 65b, but the present invention is not limited to this, and the ion exchange resin layer 65 may be composed of a plurality of three or more layers.

In the embodiment, one spacer 66 is arranged in the space 61a, but the present invention is not limited to this, and a plurality of spacers may be arranged.

In the embodiment, the water purifier 60 is provided at the bottom of the fuel cell case 12, but the present invention is not limited to this, and any water purifier 60 may be provided in the fuel cell case 12 at a relatively low temperature. For example, it may be provided in a place away from the power generation module 30 and the hot water storage tank 70, in the vicinity of the inflow port where the outside air flows into the fuel cell case 12.

The correspondence between the main elements of the present embodiment and the main elements of the invention described in the column of means for solving the problem will be described. In the present embodiment, the water purifier 60 corresponds to the "water purifier", the storage container 61 corresponds to the "containment container", the inlet 63 corresponds to the "inlet", and the outlet 64 corresponds to the "outlet". The ion exchange resin layer 65 (upper resin layer 65a and lower resin layer 65b) corresponds to the "ion exchange resin layer", and the space 61a corresponds to the "space". Further, the spacer 66 corresponds to a "spacer". Further, the fuel cell system 10 corresponds to the "fuel cell system", the fuel cell stack 36 corresponds to the "fuel cell", the reformer 34 corresponds to the "reformer", and the reformer water tank 52 corresponds to the "reformer". It corresponds to the "water tank", and the heat exchanger 57 corresponds to the "heat exchanger". Further, the fuel cell case 12 corresponds to the "housing".

The correspondence between the main elements of the present embodiment and the main elements of the invention described in the column of means for solving the problem is the invention described in the column of the means for solving the problem in the present embodiment. Since it is an example for specifically explaining the embodiment for carrying out the above, the elements of the invention described in the column of means for solving the problem are not limited. That is, the interpretation of the invention described in the column of means for solving the problem should be performed based on the description in the column, and this embodiment is the invention described in the column of means for solving the problem. It is just a concrete example of.

Although the embodiments for carrying out the present invention have been described above, the present invention is not limited to these embodiments, and can be carried out in various forms without departing from the gist of the present invention. Of course.

The present invention can be used in the manufacturing industry of water purifiers and the like.

1 gas supply source, 10 fuel cell system, 12 fuel cell case, 20 power generation unit, 30 power generation module, 31 module case, 32 vaporizer, 34 reformer, 36 fuel cell stack, 38 combustion part, 40 raw fuel gas supply Equipment, 41 Raw fuel gas supply pipe, 42 gas supply valve, 43 gas pump, 45 air supply equipment, 46 air supply pipe, 47 filter, 48 air blower, 50 reforming water supply equipment, 51 reforming water supply pipe, 52 reforming Water tank, 53 reformed water pump, 55 exhaust heat recovery device, 56 circulation pipe, 56a circulation pump, 57 heat exchanger, 58 condensed water supply pipe, 59 exhaust gas discharge pipe, 60 water purifier, 61 storage container, 61a Space, 62 Flange, 63 Inlet, 64 Outlet, 65 Ion Exchange Resin Layer, 65a Upper Resin Layer, 65b Lower Resin Layer, 66 Spacer, 66a Inverted Conical Part, 66b Conical Part, 66c Cylindrical Part, 70 Hot water storage tank, 80 control device.

Claims (6)

A water purifier that purifies condensed water by heat exchange.
It has a water inlet at the top and a water outlet at the bottom, and the side wall is filled with a tubular storage container and the storage container so as to overlap each other. At least two ion exchange resin layers with different mixing ratios of ion exchange resins,
Equipped with
The storage container has a space capable of storing water between the ion exchange resin layer on the uppermost layer and the inlet.
A water purifier provided in the space and provided with a spacer formed by forming a flow path through which water flowing from the inflow port flows to the ion exchange resin layer on the uppermost layer and forming a throttle for narrowing the flow rate of the flow path. The water purifier according to claim 1.
The spacer is a water purifier formed so that the center of the throttle is deviated from the center of the inlet in the top view. The water purifier according to claim 1 or 2.
Each of the ion exchange resin layers is formed of an ion exchange resin having a specific gravity higher than that of water.
The spacer is a water purifier made of a material having a specific density lower than that of water. The water purifier according to any one of claims 1 to 3.
The uppermost ion exchange resin layer is formed only of a cationic resin.
The other ion exchange resin layer is a water purifier formed by containing at least an anionic resin having a lower heat resistance than the cationic resin. A fuel cell system including a fuel cell that generates electricity based on a reforming gas containing hydrogen and an oxidant gas containing oxygen.
A reformer that reforms the raw fuel gas to generate the reformed gas,
A water tank for storing the water used to generate the reformed gas, and
A heat exchanger that supplies condensed water to the water tank by heat exchange between the exhaust gas discharged from the fuel cell and the refrigerant.
The water purifier according to any one of claims 1 to 4 , which is provided in the water supply path from the heat exchanger to the water tank.
A fuel cell system equipped with. The fuel cell system according to claim 5.
A housing for accommodating the fuel cell, the reformer, the water tank, the heat exchanger, and the water purifier is provided.
The fuel cell, the reformer, and the heat exchanger are provided at positions separated from the bottom of the housing.
The water tank is provided at the bottom of the housing and is provided.
The water purifier is a fuel cell system provided in the vicinity of the water tank.

Images