JP2013182832A - Water purifying device of fuel cell system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifying device of a fuel cell system that facilitates attachment and detachment of a water purifier to and from a water tank, has a simple and compact configuration, and has improved maintainability.SOLUTION: A water purifying device 7 of a fuel cell system includes: a water purifier 35 that has a water purifying material 38 and a container 39 for housing the water purifying material 38; and a water tank 36 that stores therein water purified by the water purifier 35. An outlet 41 provided in the container 39 of the water purifier 35 is detachably connected to an inlet 52 provided in the water tank 36.

Description

  The present invention relates to a water purification device for a fuel cell system, and more particularly, to a water purification device for a fuel cell system in which a water purifier can be easily attached to and detached from a water tank and has a simple and small structure and excellent maintainability. .

  2. Description of the Related Art As a conventional water purification device for a fuel cell system, a device in which a water purification function and a water storage function are integrated and a device is designed compactly is known (see Patent Document 1). In this Patent Document 1, a water passage which is meandering in a vertical or horizontal direction and narrows toward an outlet portion is provided in a water container, and the ion exchange portion whose height is matched to the reversal portion in the water passage. Is provided, and a water level sensor for detecting the water surface of the water passage is provided in the water container.

  Here, it is difficult for the ion exchange part to have no maintenance for a long time (for example, 10 years) because of the physique and the like, and the ion exchange part needs to be replaced. However, in the technique of the above-mentioned patent document 1, since the water purification function and the water storage function are integrated, it is necessary to replace the entire water container in order to replace the ion exchange part, and the number of pipes to be removed increases. Moreover, work such as exchanging the equipment that can be continuously used such as a water level sensor or rearranging the water level sensor or the like occurs. As a result, the regular maintenance cost is significantly increased.

  In order to solve the above problem, a water purifier and a water tank are separately provided, and the outlet of the water purifier and the inlet of the water tank are connected via a rubber pipe (rubber hose). Conceivable. However, when rubber piping is used in this way, it is necessary to remove the rubber piping when the water purifier is periodically replaced. In addition, there is a possibility that deterioration products may be deposited on the reformer catalyst due to the generation of impurities in the rubber piping. Furthermore, since a pipe exists between the water purifier and the water tank, the structure is complicated and large.

JP 2011-23168 A

  The present invention has been made in view of the above-described situation, and provides a water purifier for a fuel cell system that can easily attach and detach a water purifier to and from a water tank, and has a simple and small structure and excellent maintainability. For the purpose.

In order to solve the above problem, the invention according to claim 1 is directed to a water purifier having a water purifier and a container for storing the water purifier, and a water tank for storing water purified by the water purifier. And a water purifier of a fuel cell system comprising: an outlet provided in the container of the water purifier is detachably connected to an inlet provided in the water tank; To do.
Invention of Claim 2 makes it a summary to provide the fixing | fixed part fixed to the attachment part to which the said water tank is attached to the said container of the said water refiner | purifier in Claim 1.
A third aspect of the present invention is the water tank according to the first or second aspect, wherein the water tank includes a partition weir that partitions the internal space of the water tank into a first chamber and a second chamber. The gist is that the inlet of the water tank communicates.

According to the water purifier of the fuel cell system of the present invention, the water purifier and the water tank are provided, and the outlet provided in the container of the water purifier is detachably connected to the inlet provided in the water tank. Therefore, the outlet of the water purifier and the inlet of the water tank are directly connected without interposing rubber piping. With this direct connection structure, water purified by the water purifier is circulated in the water tank, and the water purifier is held in the water tank. Thereby, the water purifier can be easily attached to and detached from the water tank. Further, there is no deposition of deteriorated substances on the reformer catalyst due to the generation of impurities in the rubber piping. Furthermore, only the water purifier side can be handled as a regular replacement part, and it is not necessary to remove a large number of pipes on site, and the maintenance is excellent. Furthermore, since there is no pipe between the water purifier and the water tank, a simple and small structure can be achieved.
In addition, when the container of the water purifier includes a fixing portion that is fixed to a mounting portion to which the water tank is attached, a direct connection structure between the outlet of the water purifier and the inlet of the water tank is used. The water purifier is held with respect to the water tank by fixing the fixing portion of the water purifier to the mounting portion. As a result, assembly time during production and work time during regular replacement can be reduced, and parts can be simplified and costs can be reduced.
Further, the water tank includes a partition weir that partitions the internal space of the water tank into a first chamber and a second chamber, and the water tank has a water inlet when the inlet of the water tank communicates with the first chamber. The water purified by the purifier flows into the first chamber of the water tank through the outlet of the water purifier and the inlet of the water tank, passes over the upper end of the partition weir, and flows into the second chamber. And the water in a 2nd chamber does not get over the upper end of a partition weir and flows back into a 1st chamber by the water level difference of a 1st chamber and a 2nd chamber. Therefore, the water purifier and bubbles are prevented from rising due to the reverse flow of water in the water purifier.

The present invention will be further described in the following detailed description with reference to the drawings referred to, with reference to non-limiting examples of exemplary embodiments according to the present invention. Similar parts are shown throughout the several figures.
1 is a schematic diagram of a fuel cell system according to an embodiment. It is a top view of the water purification apparatus which concerns on embodiment. It is the III-III sectional view taken on the line of FIG. It is a disassembled perspective view of the said water purification apparatus. It is explanatory drawing for demonstrating the effect | action of the said water refiner | purifier, (a) shows the state which cancel | released fixation of the fixing part of a water purifier, (b) shows the state which isolate | separated the water purifier from the water tank. Show.

(1) Configuration of Fuel Cell System As shown in FIG. 1, the fuel cell system 1 according to the present embodiment includes a box-shaped housing 2, a fuel cell module 3, an exhaust heat recovery system 4, an inverter device 5, and a control device. 6 and a water purifier 7.

  The case 2 includes a partition member 9 that partitions the inside of the case 2 and forms a first chamber R1 and a second chamber R2. The first chamber R1 forms a first space, and the second chamber R2 forms a second space. The partition member 9 is a plate-like member that partitions (divides) the housing 2 in the vertical direction. A first chamber R <b> 1 and a second chamber R <b> 2 are formed in the housing 2 above and below the partition member 9. In this embodiment, the partition member 9 is composed of a single plate-shaped member. However, the partition member 9 may be composed of a box-shaped member, and each of the first chamber R1 and the second chamber R2 is partitioned. You may comprise by two separate members formed in the box shape to do. The first chamber R1 and the second chamber R2 do not have to be formed by the partition member 12, but may be formed by a frame or the like, for example, and the first chamber R1 and the second chamber R2 may be formed on the plate-shaped partition member 9. A hole connecting the two chambers R2 may be opened.

  The fuel cell module 3 is accommodated in the first chamber R1 with a space from the inner wall surface of the first chamber R1. The fuel cell module 3 includes at least a casing 11 and a fuel cell 14 disposed in the casing 11. In the present embodiment, the fuel cell module 3 includes a casing 11, an evaporation unit 12, a reforming unit 13, and a fuel cell 14.

  The casing 11 is formed in a box shape with a heat insulating material. The casing 11 is supported in a first chamber R1 by a support structure (not shown) with a space from the inner wall surface of the first chamber R1. Note that it is sufficient that all the surfaces of the casing 11 are not in contact with the inner wall surface of the first chamber R1, and any one of the surfaces (six surfaces) of the casing 11 has a space between the inner wall surface of the first chamber R1. That's fine. In the casing 11, an evaporation unit 12, a reforming unit 13 and a fuel cell 14 are disposed. At this time, the evaporation unit 12 and the reforming unit 13 are disposed above the fuel cell 14.

  The evaporating unit 12 is heated by combustion gas to be described later, evaporates the supplied reforming water to generate water vapor, and preheats the supplied reforming raw material. The evaporation unit 12 mixes the steam generated in this way with the preheated reforming raw material and supplies the mixture to the reforming unit 13. Examples of the reforming raw material include gas for reforming such as natural gas and LPG, and liquid fuel for reforming such as kerosene, gasoline, and methanol. In the present embodiment, description will be made on natural gas.

  The evaporation section 12 is connected to the other end of a water supply pipe 16 whose one end (lower end) is connected to a water tank 36 described later. The water supply pipe 16 is provided with a reforming water pump 16a. The reforming water pump 16a supplies reforming water to the evaporation unit 12 and adjusts the reforming water supply amount.

  The evaporating unit 12 is supplied with a reforming material from a fuel supply source (not shown) via a reforming material supply pipe 17. The reforming raw material supply pipe 17 is provided with a pair of raw material valves (not shown), a desulfurizer 17a, and a raw material pump 17b in order from the upstream. The raw material valve is an electromagnetic on-off valve that opens and closes the reforming raw material supply pipe 17. The desulfurizer 17a removes a sulfur content (for example, a sulfur compound) in the reforming raw material. The material pump 17b adjusts the amount of fuel supplied from the fuel supply source.

  The reforming unit 13 is heated by a combustion gas described later and supplied with heat necessary for the steam reforming reaction, so that the reformed gas is generated from the mixed gas (reforming raw material, steam) supplied from the evaporation unit 12. Is generated and derived. The reforming unit 13 is filled with a catalyst (for example, a Ru or Ni-based catalyst), and the mixed gas reacts and is reformed by the catalyst to generate hydrogen gas and carbon monoxide gas (so-called so-called). Steam reforming reaction). At the same time, a so-called carbon monoxide shift reaction occurs in which carbon monoxide generated in the steam reforming reaction reacts with steam to transform into hydrogen gas and carbon dioxide. These generated gases (so-called reformed gas) are led out to the fuel electrode of the fuel cell 14. The reformed gas contains hydrogen, carbon monoxide, carbon dioxide, water vapor, and unreformed natural gas (methane gas). The steam reforming reaction is an endothermic reaction, and the carbon monoxide shift reaction is an exothermic reaction.

  The fuel cell 14 is configured by laminating a fuel electrode, an air electrode (oxidant electrode), and a plurality of cells 14a made of an electrolyte interposed between the two electrodes. The fuel cell 14 of the present embodiment is a solid oxide fuel cell, and uses zirconium oxide, which is a kind of solid oxide, as an electrolyte. Hydrogen, carbon monoxide, methane gas or the like is supplied to the fuel electrode of the fuel cell 14 as fuel. The operating temperature is about 700-1000 ° C. Not only hydrogen but also natural gas and coal gas can be used directly as fuel. In this case, the reforming unit 13 can be omitted.

  On the fuel electrode side of the cell 14a, a fuel flow path 14b through which a reformed gas that is a fuel flows is formed. An air flow path 14c through which air (cathode air) that is an oxidant gas flows is formed on the air electrode side of the cell 14a.

  The fuel cell 14 is provided on the manifold 19. The reformed gas from the reforming unit 13 is supplied to the manifold 19 through the reformed gas supply pipe 20. The lower end (one end) of the fuel flow path 14b is connected to the fuel outlet of the manifold 19, and the reformed gas led out from the fuel outlet is introduced from the lower end and led out from the upper end. . The cathode air sent out by the cathode air blower 21a (cathode air sending (blowing) means) is supplied via the cathode air supply pipe 21, introduced from the lower end of the air flow path 14c, and led out from the upper end. .

  The cathode air blower 21a is disposed in the second chamber R2. The cathode air blower 21a sucks the air in the second chamber R2 and discharges it to the air electrode of the fuel cell 14, and the discharge amount is adjusted and controlled (for example, the load power amount (power consumption amount) of the fuel cell 14). Are controlled according to the above).

In the fuel cell 14, power generation is performed by the fuel supplied to the fuel electrode and the oxidant gas supplied to the air electrode. That is, the reaction shown in Chemical Formula 1 and Chemical Formula 2 below occurs at the fuel electrode, and the reaction shown in Chemical Formula 3 below occurs at the air electrode. That is, oxide ions (O ²⁻ ) generated at the air electrode permeate the electrolyte and react with hydrogen at the fuel electrode to generate electrical energy. Therefore, the reformed gas and the oxidant gas (air) that have not been used for power generation are derived from the fuel flow path 14b and the air flow path 14c.

(Chemical formula 1)
H ₂ + O ²⁻ → H ₂ O + 2e ⁻

(Chemical formula 2)
CO + O ²⁻ → CO ₂ + 2e ⁻

(Chemical formula 3)
1 / 2O ₂ + 2e ⁻ → O ²⁻

  The reformed gas derived from the fuel flow path 14b and the air flow path 14c and not used for power generation is generated in the combustion space R3 between the fuel cell 14 and the evaporation section 12 (the reforming section 13). It burns with the oxidizing gas (air) which was not used, and the evaporation part 12 and the modification part 13 are heated with the combustion gas. Furthermore, the inside of the fuel cell module 3 is heated to the operating temperature. Thereafter, the combustion gas is exhausted out of the fuel cell module 3 from the exhaust port 11a.

  The exhaust heat recovery system 4 includes a hot water tank 23 for storing hot water, a hot water circulation line 24 for circulating the hot water, and heat that exchanges heat between the combustion exhaust gas from the fuel cell module 3 and the hot water. And an exchanger 25 (also referred to as a “condenser”).

  The hot water storage tank 23 is provided with one columnar container, in which hot water is stored in a layered manner, that is, the temperature of the upper part is the highest and lower as it goes to the lower part, and the temperature of the lower part is the lowest. It has become so. Water (low-temperature water) such as tap water is replenished to the lower part of the columnar container of the hot water tank 23, and hot hot water stored in the hot water tank 23 is led out from the upper part of the columnar container of the hot water tank 23. ing.

  One end of the hot water circulation line 24 is connected to the lower part of the hot water tank 23, and the other end is connected to the upper part of the hot water tank 23. On the hot water circulating line 24, a hot water circulating pump 24a, a heat exchanger 25, and a temperature sensor 24b, which are hot water circulating means, are arranged in order from one end to the other end. The hot water circulation pump 24a sucks hot water in the lower part of the hot water tank 23, passes the hot water circulation line 24 in the direction of the arrow in the figure, and discharges it to the upper part of the hot water tank 23, and its flow rate (delivery amount) is controlled. It has come to be. The temperature sensor 24 b detects the inlet temperature of the hot water storage tank 23, and transmits the detection result to the control device 6. The hot water circulating pump 24a is controlled in its delivery amount so that the temperature detected by the temperature sensor 24b (the inlet temperature of the hot water storage tank 23) falls within a predetermined temperature or temperature range.

  The heat exchanger 25 is a heat exchanger that is supplied with the combustion exhaust gas exhausted from the fuel cell module 3 and is supplied with hot water from the hot water storage tank 23 to exchange heat between the combustion exhaust gas and the hot water. The heat exchanger 25 is disposed in the housing 2. In the present embodiment, the heat exchanger 25 is provided in the lower part of the fuel cell module 3, and at least the lower part of the heat exchanger 25 penetrates the partition member 9 and is protruded into the second chamber R <b> 2. Yes.

  The heat exchanger 25 includes a casing 25a. The casing 25a is provided with an introduction port 25b through which combustion exhaust gas is introduced, a discharge port 25c through which combustion exhaust gas is derived, and a discharge port 25d through which condensed condensed water is derived. A heat exchange part (condensation part) 25e connected to the hot water circulation line 24 is disposed in the casing 25a. The introduction port 25b is provided in the lower part of the casing 11 of the fuel cell module 3 and communicates with the exhaust port 11a from which the combustion exhaust gas is derived. The combustion exhaust outlet port 25 c is connected to the first exhaust port 2 a via the exhaust pipe 26. The condensed water outlet 25d is formed at the bottom of the casing 25a. The combustion exhaust gas outlet 25c is formed above the condensed water outlet 25d in order to prevent the condensed water from being led out from the combustion exhaust outlet 25c.

  In the heat exchanger 25 configured as described above, the combustion exhaust gas from the fuel cell module 3 is introduced into the casing 25a from the introduction port 25b and passes through the heat exchanging portion 25e through which the hot water is circulated. Heat is exchanged between the two and condensed and cooled. The condensed combustion exhaust gas is discharged to the outside through the outlet port 25c and the exhaust pipe 26 from the first exhaust port 2a. Further, the condensed water condensed is supplied to a water purifier 35 described later through the condensed water outlet 25d and the condensed water supply pipe 27 (falls down by its own weight). On the other hand, the hot water stored in the heat exchange unit 25e is heated and discharged.

  Further, the fuel cell system 1 includes a ventilation air flow path L. In the ventilation air flow path L, outside air is introduced from the air introduction port 2c of the second chamber R2, flows through the second chamber R2 and the first chamber R1, and then flows from the air outlet 2b of the first chamber R1 to the outside. It is a flow path led to. On the ventilation air flow path L, one ventilation air blower for blowing the ventilation air from the air inlet 2c of the second chamber R2 toward the air outlet 2b of the first chamber R1 so that the flow rate can be adjusted ( A blowing means) 28 is provided.

  The air inlet 2c is formed in the housing 2 that forms the second chamber R2 (formed in the second chamber R2), and is an inlet that introduces air from the outside into the second chamber R2. . The air outlet 2b is formed in the casing 2 that forms the first chamber R1 (formed in the first chamber R1), and the outlet that leads out the air (gas) in the first chamber R1 to the outside. It is.

  An air inlet 9a is formed in the partition member 9 that partitions the first chamber R1 and the second chamber R2. The air inlet 9a is an inlet for introducing air (gas) in the second chamber R2 into the first chamber R1. In this embodiment, the air blower 28 for ventilation is provided in the air inlet 9a. The ventilation air blower 28 sucks air in the second chamber R2 and sends it out into the first chamber R1 through the air inlet 9a. The ventilation air blower 28 blows air from the air inlet 2c of the second chamber R2 toward the air outlet 2b of the first chamber R1 so that the flow rate can be adjusted.

  Thus, the ventilation air flow path L has the air inlet 2c and the air outlet 2b, and the second chamber R2 from the air inlet 2c to the air outlet 2b via the air inlet 9a and the first air outlet 2b. It is a flow path constituted by the space in the chamber R1.

  By driving the ventilation air blower 28, external air flows into the second chamber R2 through the air inlet 2c. The external air (ventilation air) introduced into the second chamber R2 exchanges heat between the space in the second chamber R2 and a member (for example, the inverter device 5) that has become hot. It flows toward the air inlet 9a of the partition member 9 (ie, while cooling the inverter device 5 and the like).

  The air whose temperature has been increased by heat exchange in the second chamber R2 is sent into the first chamber R1 through the air inlet 9a. The ventilation air introduced into the first chamber R1 exchanges heat between the inner wall surface of the first chamber R1 and the casing 11 with the fuel cell module 3 (that is, the fuel cell module 3 or the casing). 2), the air flows toward the air outlet 2b. And the air for ventilation which became high temperature (for example, 40-60 degreeC) is discharged | emitted outside from the air outlet 2b.

  The inverter device 5 receives a DC voltage output from the fuel cell 14, converts it to a predetermined AC voltage, and outputs it to a power line 32 connected to an AC system power supply 31 and an external power load 33. And a second function of inputting an AC voltage from the system power supply 31 through the power supply line 32, converting the AC voltage into a predetermined DC voltage, and outputting the converted voltage to the auxiliary machine.

  The system power supply (or commercial power supply) 31 supplies power to the power load 33 via a power supply line 32 connected to the system power supply 31. The fuel cell 14 is connected to the power supply line 32 via the inverter device 5. The power load 33 is a load driven by an AC power supply, and is an electrical appliance such as a dryer, a refrigerator, or a television. The auxiliary equipment includes motor-driven pumps 16 a and 17 b for supplying reforming raw material, water, and air to the fuel cell module 3, a ventilation air blower 28, and the like. This auxiliary machine is driven by a DC voltage.

  The inverter device 5 includes a current sensor 5a. The current sensor 5 a detects the power output from the inverter device 5 to the external power load 33 via the power supply line 32 and the power input from the system power supply 31 to the inverter device 5 via the power supply line 32. This detection result is transmitted to the control device 6.

  Further, the power supply line 32 is provided with a current sensor 32a. The current sensor 32 a detects reverse power flow from the inverter device 5 to the system power supply 31 and forward power flow from the system power supply 31 to the inverter device 5. This detection result is transmitted to the control device 6.

  The control device 6 is connected to the current sensors 5a and 32a, the pumps 24a, 16a and 17b, and the blowers 28 and 21a. The control device 6 has a microcomputer (not shown), and the microcomputer includes an input / output interface, a CPU, a RAM, and a ROM (all not shown) connected via a bus. The CPU is operating the fuel cell system. The RAM temporarily stores variables necessary for executing the program, and the ROM stores the program.

  This control device 6 is externally connected based on the output power from the inverter device 5 detected by the current sensor 5a and the power input / output to / from the system power source 31 detected by the current sensor 32a in a state where the fuel cell 14 can generate power. The power consumption consumed by the power load 33 is calculated. For example, the sum of the output power from the inverter device 5 and the power input to and output from the system power supply 31 is calculated as the power consumption. The control device 6 controls the supply amount of raw materials, water, and the like supplied to the fuel cell module 3 so that the generated power of the fuel cell 14 becomes the calculated power consumption. When the power consumption exceeds the maximum generated power of the fuel cell 14, the fuel cell 14 is operated with the maximum generated power.

(2) Configuration of Water Purification Device As shown in FIGS. 2 and 3, the water purification device 7 according to the present embodiment is a water purification device that purifies condensed water generated by the heat exchanger 25 (see FIG. 1). 35 (also referred to as “water purifier” or “pure water purifier”) and a water tank 36 for storing the water purified by the water purifier 35. The water purifier 35 and the water tank 36 are disposed adjacent to each other on a base plate 37 (illustrated as an “attachment portion” according to the present invention) constituting the bottom side of the housing 2.

  The water purifier 35 includes a water purifying material 38 made of a large number of granular activated carbons and ion exchange resins, and a container 39 that fills and stores the water purifying material 38. The container 39 includes a bottomed cylindrical resin body 39a that is open at the top, and a resin lid member 39b that closes the upper open portion of the container body 39a.

  A tubular outlet 41 extending in the horizontal direction is integrally formed at the lower portion of the container body 39a. The outlet 41 communicates with the internal space of the container body 39 a and forms a passage through which purified water flows out of the container 39. Further, an annular recess is formed on the outer peripheral side of the outlet 41, and an annular seal member 41a is fitted in this recess. Further, a filter 42 is provided at the bottom of the container main body 39a so as to close the bottom surface side of the water purification material 38. Furthermore, a leg portion 43 placed on the base plate 37 is provided at the bottom of the container main body 39a. A flat plate-like fixing portion 45 fixed to the base plate 37 by screws 44 is provided on the outer peripheral side of the leg portion 43 (see FIG. 4).

  The lid member 39b is formed in a cap shape. On the inner peripheral side of the lid member 39b, a hook portion 46 protruding in the direction of the sphere is formed (see FIG. 3). The hook portion 46 is engaged with an annular recess 47 formed on the upper outer peripheral side of the container body 39a, and a lid member 39b is fixed to the container body 39a. Furthermore, a tubular inflow port 48 extending in the vertical direction to which one end side of the condensed water supply pipe 27 (see FIG. 1) is connected is provided at the center of the lid member 39b. The inflow port 48 forms a passage through which condensed water from the heat exchanger 25 flows into the container 39.

  The water tank 36 includes a box-shaped resin tank main body 36a having an upper opening, and a flat plate-shaped resin lid member 36b for closing an upper open portion of the tank main body 36a. A partition weir 51 having a substantially U-shaped cross section is provided in the tank body 36a to partition the internal space of the water tank 36 into a first chamber S1 having a small capacity and a second chamber S2 having a large capacity. Yes.

  A tubular inflow port 52 extending in the horizontal direction is integrally formed at a lower portion of one side wall of the tank body 36a. The inflow port 52 communicates with the first chamber S1 and forms a passage through which the water purified by the water purifier 35 flows into the first chamber S1. Moreover, the outflow port 41 of the water purifier 35 is detachably connected to the inner peripheral side of the inflow port 52 through a seal member 41a. In addition, a tubular outlet 53 extending in the horizontal direction is integrally formed at a lower portion of one side wall of the tank body 36a. The outlet 53 communicates with the second chamber S2 and forms a passage through which water stored in the second chamber S2 flows out of the water tank 36. Further, one end side of the water supply pipe 16 (see FIG. 1) is connected to the distal end side of the outlet 53. Further, a tubular drain port 54 (also referred to as “overflow port”) extending in the horizontal direction is integrally formed on the upper portion of one side wall of the tank body 36a. The drain port 54 communicates with the second chamber S2 and forms a passage for discharging excess water to the outside of the water tank 36 when the water level in the second chamber S2 exceeds a preset control water level h2. .

  The partition weir 51 is provided such that its upper end 51a is higher than the lower end 54a of the opening of the drain port 54 (see FIG. 3). Therefore, the water level h1 of the first chamber S1 is always higher than the water level h2 of the second chamber S2. Further, the partition weir 51 is provided such that its upper end 51 a is higher than the upper end 38 a of the water purification material 38 accommodated in the container 39 of the water purifier 35. Therefore, the water level h3 in the water purifier 35 (that is, the water level h1 of the first chamber S1) becomes higher than the upper end 38a of the water purifying material 38, and the water purifying material 38 is always maintained in a state immersed in water.

  A leg portion 56 placed on the base plate 37 is provided at the lower portion of the tank body 36a. On the outer peripheral side of the leg portion 56, a plurality of (two in the drawing) flat plate-like fixing portions 58 that are fixed to the base plate 37 by screws 57 are provided (see FIG. 4). Further, a water amount sensor (water level sensor) 59 for detecting the amount of water in the water tank 36 is provided at the center of the lid member 36b. The water amount sensor 59 transmits a detection signal to the control device 6. As the water amount sensor 59, for example, a float type or electrostatic capacity type water level meter can be adopted.

(3) Action of Water Purifier Next, the action of the water purifier 7 having the above configuration will be described. During the operation of the fuel cell system 1, the combustion exhaust gas exhausted from the fuel cell module 3 is supplied to the heat exchanger 25 and condensed, and the condensed water generated in the heat exchanger 25 via the stored condensed water supply pipe 27 is condensed. The condensed water is supplied to the water purifier 35 and purified by the water purifier 35 (see FIG. 1). The purified water flows into the first chamber S1 of the water tank 36 through the outlet 41 of the water purifier 35 and the inlet 52 of the water tank 36, and passes over the upper end of the partition weir 51, that is, the partition. The upper end of the weir 51 overflows and flows into the second chamber S2 of the water tank 36 (see FIG. 3). And the water in 2nd chamber S2 is supplied to the fuel cell module 3 through the water supply pipe 16 (refer FIG. 1). The water level in the second chamber S2 varies according to the amount of water supplied to the fuel cell module 3.

  On the other hand, when the water purifier 35 is periodically replaced, as shown in FIG. 5A, the screw 44 is removed from the fixing portion 45 of the water purifier 35 to release the water purifier 35 from being fixed to the base plate 37. . Thereafter, as shown in FIG. 5B, if the water purifier 35 is separated from the water tank 36 in the horizontal direction and the outlet 41 is extracted from the inlet 52, the water purifier 35 is removed from the water tank 36. Are separated. Thereafter, a new water purifier 35 is prepared, and the outlet 41 of the new water purifier 35 is inserted into the inlet 52 of the water tank 36 by a procedure reverse to the above-described separation action, and the water is purified by the screw 44. If the fixing portion 45 of the container 35 is fixed to the base plate 37, the periodic replacement work is completed.

(4) Effects of the Embodiment As described above, according to the water purification device 7 of the fuel cell system 1 of the present embodiment, the flow provided in the container 39 of the water purifier 35 is provided with the water purifier 35 and the water tank 36. Since the outlet 41 is detachably connected to the inlet 52 provided in the water tank 36, the outlet 41 of the water purifier 35 and the inlet 52 of the water tank 36 do not interpose rubber piping. Directly connected. With this direct connection structure, the water purified by the water purifier 35 is circulated in the water tank 36, and the water purifier 35 is held in the water tank 36. Thereby, the water purifier 35 can be easily attached to and detached from the water tank 36. Further, there is no deposition of deteriorated substances on the reformer catalyst due to the generation of impurities in the rubber piping. Furthermore, only the water purifier 35 side can be handled as a regular replacement part, and it is not necessary to remove a large number of pipes on the site, and the maintenance is excellent. Furthermore, since there is no pipe between the water purifier 35 and the water tank 36, a simple and small structure can be achieved.

  In the present embodiment, since the water purifier 35 and the water tank 36 are separately provided, a relatively large amount of water can be stored in the water tank 36, and the exhaust gas generated by the power generation of the fuel cell 14 is condensed. By this, it can utilize suitably for the water collection | recovery system which carries out the complete circulation (water self-supporting) of water required for reforming. On the other hand, in the technique of the above-mentioned patent document 1, since the water purification function and the water storage function are integrated, it is difficult to secure a relatively large amount of water in the water container, and the water necessary for reforming is completely removed. It is unsuitable for circulating water recovery systems.

  Moreover, in this embodiment, since the container 39 of the water purifier 35 includes a fixing portion 45 that is fixed to the base plate 37 to which the water tank 36 is attached, the outlet 41 of the water purifier 35 and the inlet of the water tank 36. The water purifier 35 is held with respect to the water tank 36 by utilizing the direct connection structure with 52 and fixing the fixing portion 45 of the water purifier 35 to the base plate 37. As a result, assembly time during production and work time during regular replacement can be reduced, and parts can be simplified and costs can be reduced.

  Furthermore, in this embodiment, the water tank 36 includes a partition weir 51 that partitions the internal space of the water tank 36 into the first chamber S1 and the second chamber S2, and the inlet 52 of the water tank 36 is provided in the first chamber S1. Since the water is in communication, the water purified by the water purifier 35 flows into the first chamber S1 of the water tank 36 through the outlet 41 of the water purifier 35 and the inlet 52 of the water tank 36, and the partition weir. Over the upper end 51a of 51, it flows into the second chamber S2. Then, the water in the second chamber S2 does not flow over the upper end 51a of the partition weir 51 and backflow into the first chamber S1 due to the difference in water level between the first chamber S1 and the second chamber S2. Therefore, the water purifier 38 and bubbles are prevented from rising due to the reverse flow of water in the water purifier 35. In particular, in this embodiment, the partition weir 51 is provided such that the upper end 51a thereof is higher than the lower end 54a of the opening of the drain port 54, so that the water level in the first chamber S1 is always in the second chamber S2. It becomes higher than the water level, and the water level can be managed reliably. Since the partition weir 51 is provided, when the water purifier 35 is replaced, when water is drained on the water purifier side, the water on the water tank 36 side is retained and can be easily separated from the water purifier. It becomes. Since there is no need to discharge water on the water purifier tank 36 side, the amount of pure water input after replacement can be reduced, the capacity of pure water to be brought to the site can be reduced, There is an advantage that the exchange time can be shortened.

  In the present embodiment, the partition weir 51 is provided such that the upper end 51a thereof is higher than the upper end 38a of the water purifier 38 accommodated in the container 39 of the water purifier 35. The control water level h3 becomes higher than the upper end 38a of the water purification material 38, so that the water purification material 38 is always kept immersed in water. Therefore, deterioration due to drying or the like of the water purification material 38 is suppressed.

  Moreover, in this embodiment, since the inlet 48 which flows in the condensed water from the heat exchanger 25 in the container 39 is provided in the upper part of the container 39 of the water refiner 35, the water in the water refiner 35 is provided. The purified material 38 and bubbles are more reliably suppressed from rising.

  Further, in the present embodiment, a tubular outlet 41 is provided at the lower part of the container 39 of the water purifier 35, a tubular inlet 52 is provided at the lower part of the water tank 36, and the outlet 41 and the inlet 52 are inserted. Since it is detachably connected, the water purifier 35 can be more easily held with respect to the water tank 36, and the pipe lengths of the outlet 41 and the inlet 52 can be made the simplest and more compact structure with the necessary minimum sources. it can.

  In the present invention, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention according to the purpose and application. That is, in the above embodiment, the tubular outlet 41 and the inlet 52 are detachably connected. However, the present invention is not limited to this, and for example, provided in one of the water purifier 35 and the water tank 36. A hole-like outlet or inlet having a hole shape and a tubular inlet or outlet provided on the other side may be detachably connected.

  Moreover, in the said embodiment, although the tubular outflow port 52 and the inflow port 41 which were extended linearly were illustrated, it is not limited to this, For example, as a bent tubular outflow port and inflow port, such as L shape and U shape, Good.

  Moreover, in the said embodiment, although the outer peripheral side of the outflow port 41 was connected with the inner peripheral side of the inflow port 52 so that insertion or removal was possible, it is not limited to this, For example, an outflow port is formed in the outer peripheral side of the inflow port 52 You may make it connect the inner peripheral side of 41 so that attachment or detachment is possible.

  Moreover, in the said embodiment, although the outflow port 41 formed integrally in the container main body 39a and the inflow port 52 formed integrally in the tank main body 36a were illustrated, it is not limited to this, For example, a container main body It may be an outlet that is retrofitted to 39a or an inlet that is retrofitted to the tank body 36a.

  Moreover, in the said embodiment, although the resin container main body 39a and the tank main body 36a were illustrated, it is not limited to this, For example, it is good also as a metal container main body 39a and the tank main body 36a.

  Moreover, in the said embodiment, although the base plate 37 which comprises the bottom side of the housing | casing 2 was illustrated as an attaching part, it is not limited to this, For example, it arrange | positions in the intermediate part of the height direction in the housing | casing 3. A support frame or a support base may be used as the attachment portion.

  Moreover, in the said embodiment, although the fixing | fixed part 45 of the water purifier 35 and the fixing | fixed part 58 of the water tank 36 were fixed to the base plate 37 by screwing, it is not limited to this, For example, fixing | fixed part 45, 58 Is inserted into a groove portion formed in the base plate 37 and fixed, or the hook portions formed in the fixing portions 45 and 58 are fixed to the engaging portions formed in the base plate 37, or the fixing portions 45 and 58 are fixed. May be fixed to the base plate 37 using a clamp mechanism.

  Moreover, in the said embodiment, although the partition weir 51 which partitions off the internal space of the water tank 36 into two chambers was provided, it is not limited to this, For example, the partition weir which partitions the internal space of the water tank 36 into three or more chambers May be provided.

  Moreover, in the said embodiment, although the outflow port 53 to which the one end side of the water supply pipe 16 was connected to the water tank 36 was provided, it is not limited to this, For example, without providing the outflow port 53 in the water tank 36, One end of the water supply pipe 16 may be disposed in the second chamber S2 of the water tank 36.

  Moreover, in the said embodiment, although the mixture of activated carbon and ion-exchange resin was illustrated as the water purification material 38, it is not limited to this, For example, only one of activated carbon and ion-exchange resin is employ | adopted, activated carbon, A reverse osmosis membrane or a filter may be employed instead of or in addition to the ion exchange resin.

  In the above embodiment, the entire water purifier 35 is periodically replaced. However, the present invention is not limited to this. For example, only the water purifier 38 may be periodically replaced.

  Moreover, in the said embodiment, although the water purification apparatus 7 which refine | purifies and stores the condensed water from the heat exchanger 25 was illustrated, it is not limited to this, It replaces with or adds to the condensed water from the heat exchanger 25. Alternatively, a water purifier that purifies and stores tap water or the like may be used.

  Furthermore, in the said embodiment, although the water purification apparatus 7 used for a solid oxide fuel cell system was illustrated, it is not limited to this, For example, as a water purification apparatus used for a polymer electrolyte fuel cell system etc. Good.

  It is widely used as a technology for refining and storing water used in fuel cell systems. In particular, it is suitably used as a technique for purifying and storing condensed water from a heat exchanger.

  DESCRIPTION OF SYMBOLS 1; Fuel cell system, 7; Water purifier, 35; Water purifier, 36; Water tank, 37; Base plate, 41; Outlet, 45; Fixed part, 51; Partition weir, 52; 1 room, S2; 2nd room.

Claims (3)

A water purifier for a fuel cell system, comprising: a water purifier having a water purifying material and a container for storing the water purifying material; and a water tank for storing water purified by the water purifier,
A water purifier for a fuel cell system, wherein an outlet provided in the container of the water purifier is detachably connected to an inlet provided in the water tank.   The water purification apparatus for a fuel cell system according to claim 1, wherein the container of the water purifier includes a fixing portion fixed to an attachment portion to which the water tank is attached.   The said water tank is provided with the partition weir which partitions off the internal space of this water tank into a 1st chamber and a 2nd chamber, The said inflow port of the said water tank is connected to the said 1st chamber. A water purification device for a fuel cell system according to claim 1.

Images