• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an exhaust aftertreatment system (1a, 1b) for a fuel cell system (2) comprising a condensing section (3) for generating exhaust gas from process exhaust gas of the fuel cell system (2), a catching section (7) downstream of the condensing section (3) for catching the generated exhaust gas condensate, a suction device (4) for drawing process exhaust gas from the fuel cell system (2) in the Kondensierabschnitt (3) generating a negative pressure in the fuel cell system (2), a cleaning unit (5) for cleaning the generated exhaust gas condensate downstream of the collecting portion (7) and a valve arrangement (6) for recycling purified exhaust gas condensate into the fuel cell system (2), wherein the valve arrangement (6) between a blocking state in which the return is blocked, and at least one passage state in which exhaust gas condensate by the negative pressure in the fuel cell system ( 2) traceable, sc is durable. Furthermore, the invention relates to a reactor system with a fuel cell system (2) and an exhaust aftertreatment system according to the invention (1a, 1b) and a method for exhaust aftertreatment for a fuel cell system (2).
    公开号:AT520553A4
    申请号:T51034/2017
    申请日:2017-12-14
    公开日:2019-05-15
    发明作者:Ing Michael Seidl Dipl
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Exhaust after-treatment system, reactor system and exhaust aftertreatment process for a fuel cell system
    The present invention relates to an exhaust aftertreatment system for a fuel cell system, a reactor system with an exhaust aftertreatment system such as a stationary fuel cell system, and a method for exhaust aftertreatment for a fuel cell system.
    In particular, the invention relates to an exhaust aftertreatment system for a stationary high temperature fuel cell system. For example, a high temperature fuel cell system will be understood by those skilled in the art to be a molten carbonate fuel cell system or MCFC system operating at operating temperatures of about 580 ° C to 675 ° C. The electrolyte used in this type of fuel cell is usually an alkali metal carbonate mixed melt of lithium and potassium carbonate.
    Likewise, a solid oxide fuel cell system or an SOFC system is a high-temperature fuel cell system. SOFC systems are operated at operating temperatures of about 650 ° C to 1000 ° C. The electrolyte of this cell type consists of a solid ceramic material capable of conducting oxygen ions but insulating them for electrons. On both sides of the electrolyte layer, the electrodes, ie cathode and anode, are attached. The electrodes are gas-permeable electrical conductors. The oxygen ion-conducting
    For example, electrolyte is provided as a thin membrane in order to be able to transport the oxygen ions with low energy. The remote from the electrolyte, the outer side of the cathode is surrounded by air, the outer anode side of fuel gas. Unused air and unused fuel gas and combustion products in the form of
    Process exhaust gas is usually extracted.
    Suctioned process exhaust gas is output in the known prior art fuel cell systems directly into the environment of the fuel cell system and / or at least partially condensed and stored as exhaust gas condensate in suitable storage containers. Since the exhaust gas condensate described above may be contaminated with pollutants such as chromium and / or nickel, it must be disposed of properly. This can cause an intervention in the operation of the fuel cell system, which leads to an unwanted, temporary stoppage of the
    Fuel cell system leads. Furthermore, emptying or replacement of the storage container is associated with expenditure, which should be avoided if possible.
    International Patent Application WO 2010/096028 A1 discloses a condensate treatment system for a fuel cell system in which exhaust gas condensate is purified locally on the fuel cell system. More specifically, condensate stored in a water tank is cleaned via a filter system disposed downstream of the water tank and returned to a heating area of the fuel cell system through an evaporator. However, according to WO 2010/096028 A1, this requires a complex line and pump system which not only requires installation space, but is also associated with corresponding costs.
    Object of the present invention is to at least partially take into account the prob lematics described above. In particular, it is an object of the present invention to provide an exhaust aftertreatment system, a reactor system, and a method for exhaust aftertreatment of a fuel cell system, wherein discharge of pollutants into the environment of the fuel cell system can be prevented in a simple, efficient and reliable manner while the fuel cell system is as efficient as possible and can be operated undisturbed.
    The above object is solved by the claims. In particular, the above object is achieved by the exhaust aftertreatment system according to
    Claim 1, the reactor system according to claim 9 and the method according to claim 10 dissolved. Further advantages of the invention will become apparent from the dependent claims, the description and the drawings. In this case, features and details that are described in connection with the exhaust aftertreatment system, of course, in connection with the reactor system according to the invention, the method of the invention and in each case vice versa, so bezüg Lich the disclosure of the individual aspects of the invention is always reciprocal reference or can be ,
    According to a first aspect of the present invention, there is provided an exhaust aftertreatment system for a fuel cell system. The exhaust aftertreatment system includes a condensing section for generating exhaust gas condensate from process exhaust gas of the fuel cell system, and a collecting section downstream of the condensing section for collecting the generated exhaust gas condensate. Furthermore, the exhaust aftertreatment system has a Saugvor direction for sucking process exhaust gas from the fuel cell system in the
    Condenser section generating a negative pressure in the fuel cell system. The exhaust aftertreatment system also has a cleaning unit for
    Cleaning the generated exhaust gas condensate downstream of the catchment section and a valve arrangement for returning purified exhaust gas condensate into the fuel cell system, wherein the valve arrangement is traceable between a blocking state in which the recirculation is blocked and at least one permeability state in which exhaust gas condensate is traceable by the negative pressure in the fuel cell system, is switchable.
    In the context of the present invention, it has been found that by the
    Vacuum generated negative pressure in the fuel cell system can be used to promote in a simple and efficient way, the purified exhaust gas condensate as process water back into the fuel cell system. According to the invention, a passive recirculation through the purified exhaust gas condensate, which is sucked into the same by the existing negative pressure in the fuel cell system, used. On a hitherto additionally required for the purpose of condensate return
    Pump system can be omitted. The present exhaust aftertreatment system can be realized in a particularly cost-effective and space-saving. The suction device can be understood as a fluid conveying device, for conveying the exhaust gas condensate from the fuel cell system through the condensing section into the environment of the exhaust gas aftertreatment system.
    The illustrated exhaust aftertreatment system can be supplemented by its simple on construction also particularly easy to existing fuel cell systems. On an existing fuel cell system this little or no modifications must be made. Thanks to the integrated cleaning unit, a fuel cell system can also be easily integrated as a stationary power plant in residential and / or commercial units, without having to worry about the disposal of contaminated exhaust gas condensate.
    Characterized in that the exhaust gas condensate cleaned and reused in the
    Fuel cell system is traceable, can be dispensed with an expensive disposal of unpurified exhaust gas condensate. In particular, it can be enough that the operation of the fuel cell system during the Entsor supply of contaminated exhaust gas condensate must be interrupted.
    The exhaust aftertreatment system is preferably configured for use on a stationary fuel cell system, particularly on a stationary high temperature fuel cell system such as an SOFC system.
    The condensing section is preferably arranged directly downstream of the fuel cell system, in particular directly downstream of a high-temperature section of the fuel cell system, a so-called hot box. The suction device is preferably arranged directly downstream of the condensing section. As a result, the process exhaust gas can be sucked from the fuel cell system or hotbox into the condensing section in a particularly efficient and effective manner. The Saugvor direction provides in such an arrangement a check valve function. That is, by such an arrangement, negative pressure can be maintained on one side upstream of the suction device, while ambient pressure can prevail on one side downstream of the suction device. During the return of the purified exhaust gas condensate from the cleaning unit in the fuel cell system are in the fuel cell system at least partially, especially in the high temperature range of the fuel cell system, negative pressure, in and / or adjusted to the cleaning unit overpressure, and in and / or at the recycle storage ambient pressure.
    The cleaning unit has a filter system for filtering unwanted substances such as chromium and / or nickel in the exhaust gas condensate. The filter system may be formed, for example, as an ion exchanger (resin granules in cartridges), which binds the chromium and / or nickel ions. The cleaning unit can advantageously also be designed so that all legal limits can be met, such as a limit value for nitrite or a pH value.
    Value. The valve arrangement is configured for blocking or controlling and / or regulating egg nes exhaust gas condensate flow in the direction of the fuel cell system. For this purpose, the valve arrangement preferably has a check valve or a flow control valve. In the blocking state, a fluid path from the cleaning unit to the fuel cell system is blocked at least at one point. Between the cleaning unit and the valve arrangement further functional components may be arranged. In an open state of the valve arrangement, exhaust gas condensate purified by negative pressure in the fuel cell system can be sucked out of the cleaning unit through the valve arrangement into the fuel cell system. Between the valve arrangement and the cleaning unit, further functional components can be arranged, through which the exhaust gas condensate can or must pass on its way from the cleaning unit to the fuel cell system. That is, including that the valve assembly is disposed downstream of the cleaning unit, it is not necessary to understand that the valve assembly is located directly downstream of the cleaning unit, ie without interposed functional components of the gas aftertreatment from Ab.
    The process exhaust gas has process gas. Already in the hot box, the anode exhaust gas is mixed with the cathode exhaust gas and fuel residues are burned in an oxicate. The process exhaust, which condenses out in the exhaust gas cooler, therefore usually no longer contains fuel gas. About the Kondensierabschnitt can
    Exhaust gas condensate in the direction of the collecting section and non-condensed pro zessabgas are passed into the environment of the exhaust aftertreatment system.
    According to a further embodiment of the present invention, it is possible that the collecting section has a buffer memory for at least temporary storage of the collected exhaust gas condensate. The buffer tank ensures that no exhaust gas is pumped into the cleaning unit if there is insufficient condensate. The buffer tank guarantees a minimum amount that can be pumped when the pump is active. In particular, by the buffer memory as uniform as possible exhaust gas condensate stream in the direction of the cleaning unit can be made possible because it is not only possible to promote evenly, but also to provide exactly the flow and pressure available, in which the cleaning unit works optimally. Under the buffer is preferably a liquid tank to understand. The liquid tank or the buffer memory can have a fluid inlet for receiving the exhaust gas condensate from the condensing section and a fluid outlet for outputting cached exhaust gas condensate in the direction of the cleaning unit.
    Further, it is possible that in an exhaust aftertreatment system according to the invention downstream of the collecting section and upstream of the Reinigungssein unit a pump for pumping the exhaust gas condensate from the collecting section is arranged in the cleaning unit. The pump fulfills the invention a Dop pelfunktion. On the one hand, a defined amount of exhaust gas condensate from the collecting section or from the buffer reservoir into the cleaning unit can always be conveyed by the pump. On the other hand, the pump has a valve function by means of which a desired pressure level upstream of the pump in the receiving section, in the condensing section and in the fuel cell system and downstream of the pump in and / or on the cleaning unit can be maintained. However, it may also be provided additional check valve to further increase a safety. In particular, a negative pressure can be maintained upstream of the pump, while downstream of the pump at least in sections a high pressure or overpressure can be maintained and / or generated by a pumping action of the pump. This pressure gradient has a positive effect on the desired exhaust gas condensate return. The pump is preferably configured as zwangsför-reducing pump.
    Furthermore, it is in an exhaust aftertreatment system according to the present invention
    Invention possible that downstream of the cleaning unit and upstream of the valve assembly, a recycle store for storing purified exhaust gas condensate is arranged. With the help of the return storage, the most uniform and / or predefined exhaust gas condensate recirculation flow can be set.
    Through the recycle accumulator, the exhaust gas condensate recirculation can be carried out relatively independently of the cleaning operation of the purification unit. That is, while the cleaning unit is in a deactivated state because the
    Pump temporarily no exhaust gas condensate pumped from the collecting section into the cleaning unit, anyway or in particular stored in such a state purified exhaust gas condensate can be guided or sucked from the recycle storage in the fuel cell system. The return storage can be understood as a further buffer memory for temporarily storing purified exhaust gas condensate.
    Moreover, in one embodiment variant of the present invention, it is possible for a flow meter for setting a defined return quantity of exhaust gas condensate to be arranged in the fuel cell system downstream of the return storage and upstream of the valve arrangement. With the aid of the flow meter, too high and too low recirculation quantities into the fuel cell system can be prevented and the fuel cell system can be protected accordingly. In addition, using the flow meter, it can be prevented that the recycle accumulator is drained too quickly and / or inefficiently toward the fuel cell system. Alternatively or additionally, an efficiency can also be increased by a targeted metering of a quantity of water.
    In an exhaust aftertreatment system according to the invention, it is also possible that a vent valve for venting the return storage is arranged on the return storage. Through the vent valve can always easily ge the desired pressure on the return storage and thus corresponding upstream of the
    Valve arrangement can be ensured. In particular, this can be easy on
    Make the desired pressure gradient between the return storage and the
    Fuel cell system can be made possible with the valve assembly open, so that the exhaust gas condensate from the return storage always without additional pumps required can be sucked into the fuel cell system.
    According to a further embodiment of the present invention, it is possible that in an exhaust aftertreatment system on the recycle accumulator an outlet valve for predefined discharge of purified exhaust gas condensate from the recycle store is arranged in the vicinity of the recycle store. Once a sufficient amount of purified exhaust gas condensate is in Rückführspei cher or as soon as a maximum allowable amount of exhaust gas condensate is in the return storage, the exhaust valve can be switched ge in an on state or opened. This can be prevented, for example, that the operation of the cleaning unit must be interrupted in order to prevent any overfilling of the return storage. The outlet valve is preferably located in a separate fluid line downstream of the recycle accumulator.
    However, the outlet valve can also be arranged upstream of the return storage, so that at this point a bypass to the return storage is formed. Thus, purified exhaust gas condensate from the purification unit can be routed directly into the environment of the recirculation storage or the exhaust aftertreatment system, even before it reaches the recycle storage.
    In an exhaust aftertreatment system according to the invention, the condensate sierabschnitt a heat exchanger or a heat exchanger for generating the exhaust gas condensate. That is, the heat exchanger is arranged and configured to generate the exhaust gas condensate from the process exhaust gas of the fuel cell system. In experiments within the scope of the present invention, it has been found that a heat exchanger is particularly efficient and effective for the desired condensation. The heat exchanger is preferably arranged in the exhaust gas aftertreatment system such that the fuel cell system and the suction device face a cold side or cold sides of the heat exchanger. To provide the hot side or hot sides of the heat exchanger, this can be connected to a suitable heat source, in particular be in fluid communication. For heating the heat exchanger, this may be in fluid communication with a heating source of the fuel cell system, which may serve as the sole or additional heating source. The heat source of
    Fuel cell system is then in accordance with a hot side of the heat exchanger in fluid communication. Thus, the heat exchanger can be heated in particular by hot process fluids of the fuel cell system.
    The heat exchanger is basically designed and arranged to use a system waste heat. Thermal energy can be fed, for example via the exhaust gas heat exchanger in building services and / or boiler. The lower the temperature, the better for overall system efficiency. Condensation of the water further increases the efficiency because it can use the calorific value of the fuel. The exhaust gas from the SOFC system is routed through the hot side of the heat exchanger. Cooling is in most applications especially with
    Water from the building services.
    According to another aspect of the present invention, there is provided a reactor system having an exhaust aftertreatment system as described in detail above and a stationary fuel cell system by which the process exhaust gas is generated. Thus brings a reactor system according to the invention with the same advantages, as they have been described in detail with respect to the inven tion proper exhaust aftertreatment system. The fuel cell system of the reactor system is designed in particular as a stationary fuel cell system, preferably as a stationary SOFC system. The fuel cell system can therefore be understood as a stationary power plant.
    In addition, a method for exhaust aftertreatment for a Brennstoffzel lensystem is provided with the exhaust aftertreatment system explained in detail above. The method comprises the following steps: Suction of process exhaust gas from the fuel cell system into the condensing sierabschnitt by the suction device to generate a negative pressure in the fuel cell system, - passing the generated exhaust gas condensate from the Kondensierabschnitt in the
    Cleaning unit for purifying the exhaust gas condensate, and - Setting the valve assembly in the on state, while a Druckge falls from upstream of the valve assembly in the direction downstream of the valve assembly prevails.
    Thus, a method according to the invention brings the same advantages, as they have been described in detail with respect to the exhaust aftertreatment system according to the invention. In experiments in the context of the present invention, it has been found that a particularly advantageous recycling of the exhaust gas condensate can be achieved if a negative pressure in a range between 0.9 bar and 1 bar in the fuel cell system is generated by the suction of the exhaust gas from the fuel cell system. When the valve assembly is placed in the on-state while there is a pressure differential from upstream of the valve assembly downstream of the valve assembly, the purified exhaust gas condensate may automatically enter the fuel cell system upstream of the open valve assembly, ie, the purifier or return reservoir, optionally via the flow meter be sucked. The valve assembly is preferably set such that it is only put into the on-state, when in the recycle store a predefined amount of purified from gas condensate. As a result, it can be ensured that the fuel cell system does not suck air at this point, as a result of which the fuel cell system may be damaged and / or lose the negative pressure state.
    Furthermore, it is possible that in a method according to the present inven tion, the purified exhaust gas condensate is returned from the cleaning unit in the fuel cell system, while set in the fuel cell system, a lower pressure than in and / or on the cleaning unit and / or in and / or the recycle store is. In particular, an overpressure is generated in and / or on the cleaning unit, preferably by the pump, while ambient pressure prevails or is set in the region of the return storage. As soon as purified exhaust gas condensate is to be returned to the fuel cell system, in this state, the pump can be switched into a blocking state and the valve arrangement in an on-state.
    According to a further embodiment variant of the present invention, in one method, the on-state of the valve arrangement for the discontinuous recycling of the exhaust gas condensate can be adjusted to a predefined opening duration. This can be automatically prevented that too much exhaust gas condensate is passed into the fuel cell system. The opening duration may preferably be set or predefined as a function of an operating state of the fuel cell system and / or a filling state of the return storage. However, it seems that continuous recycling is more convenient.
    Further, measures improving the invention will become apparent from the following description of various embodiments of the invention, which are shown schematically in the figures. All resulting from the claims, the Be or drawing drawing features and / or benefits, finally a constructive details and spatial arrangements may be essential to the invention both in itself and in the various combinations.
    Each show schematically:
    1 shows a reactor system with a fuel cell system and an exhaust aftertreatment system according to a first embodiment of the present invention,
    2 shows a reactor system with a fuel cell system and an exhaust aftertreatment system according to a second embodiment of the present invention, and
    FIG. 3 shows a flow chart for explaining a method according to the invention.
    Elements with the same function and mode of operation are each provided in the figures 1 to 3 with the same reference numerals.
    FIG. 1 shows a reactor system with a fuel cell system 2 and an exhaust aftertreatment system 1a connected thereto. The fuel cell system 2 has a high-temperature section 12, a so-called hot box, from which process exhaust gas can be conducted or sucked into the exhaust gas aftertreatment system 1 a. The exhaust aftertreatment system 1 a has a condensate sierabschnitt 3 in the form of a heat exchanger for generating exhaust gas condensate from the process exhaust gas of the fuel cell system 2. The exhaust gas aftertreatment system 1a further has a catching section 7 downstream of the condensing section 3 for collecting the generated exhaust gas condensate, the catching section 7 having a buffer store for at least temporarily storing the collected exhaust gas condensate.
    Furthermore, the exhaust aftertreatment system 1a to a suction device 4 for
    Aspirating process exhaust gas from the fuel cell system 2 in the Kondensierabschnitt 3 while generating a negative pressure in the fuel cell system 2. The suction device 4 is disposed directly downstream of the condensing section 4 on a cold side thereof, since it is more stable and efficient to operate there because of the low temperatures. By means of the suction device 4 can thus not condensed process exhaust gas through the Kondensierabschnitt 3 into the
    Be sucked or directed environment of the reactor system.
    The exhaust aftertreatment system 1 a also has a cleaning unit 5
    Cleaning the generated exhaust gas condensate downstream of the collecting section 7, wherein upstream of the cleaning unit 5 and downstream of the conden sierabschnitts 3 a pump 8 for pumping the exhaust gas condensate from the collecting section 7 is arranged in the cleaning unit 5. In addition, the exhaust aftertreatment system 1 a a valve assembly 6 for returning purified exhaust gas condensate in the fuel cell system 2, wherein the Ventilanord Regulation 6 between a blocking state in which the return is locked, and at least one passage state in which exhaust gas condensate due to the negative pressure in the fuel cell system 2 traceable is, is switchable.
    Downstream of the cleaning unit 5 and upstream of the valve assembly 6 is a return storage 9 for storing purified exhaust gas condensate angeord net. Downstream of the recycle accumulator 9 and upstream of the valve assembly 6, a flow meter 10 for setting a defined recirculation amount of exhaust gas condensate in the fuel cell system 2 is arranged.
    In Fig. 1, an operating state of the reactor system is shown, in which at ei ner valve assembly 6, which is in the passage state, purified exhaust gas condensate from the return storage controlled in the fuel cell system 2 is sucked. Here are, as shown in Fig. 1, the fuel cell system 2, the Kondensierabschnitt 3 and the collecting section 7 in a negative pressure range U, the cleaning unit 5 in a high pressure area H and the return guide storage, the flow meter 10 and the valve assembly 6 in one ambient pressure range. The respective functional components are therefore also in the corresponding pressure states. The high-pressure region H is to be understood as meaning a region of the reactor system in which there is a higher pressure than in the vacuum region U and in the ambient pressure region A.
    2, a reactor system with an exhaust aftertreatment system 1b according to a second embodiment of the present invention is shown. At the in
    2 exhaust gas aftertreatment system 1b is arranged on a closed return storage 9 a vent valve 13 for venting the return storage 9. In addition, downstream of the return storage 9, an outlet valve 14 for predefined discharge of purified exhaust gas condensate from the return storage 9 in the surroundings 11 of the return storage 9 is arranged. Gereinig term exhaust gas condensate can be discharged for example via a fireplace to the environment. In order to avoid an accumulation of condensate in the chimney, a return line is provided directly at the chimney, through which condensate is sucked from the chimney into the collecting section 7. In the collecting section 7 condensate is thus collected and discharged together with the generated exhaust gas condensate. This ensures that, if still anodes exhaust gas comes to the chimney and condenses there, this is returned to the system before being discharged to the environment. This return line can of course also be provided in an embodiment according to FIG. 1. It may also be beneficial to install a one-way vent valve in order not to operate the environment 11 in negative pressure. In this case, the outlet valve 14 may be formed as a pressure relief valve, which is set to a fixed value.
    With reference to FIG. 3, a method for exhaust aftertreatment for a fuel cell system 2 with an exhaust after-treatment system 1a as illustrated in FIG. 1 will be explained below. In a first step S1 process exhaust gas from the fuel cell system 2 in the condensing section 3 by the Saugvorrich device 4 is sucked to generate a negative pressure in the fuel cell system 2.
    For this purpose, the valve assembly 6 is switched to a blocking state.
    In a second step S2, the exhaust gas condensate produced by the condensate sierabschnitt 3 is passed into the cleaning unit 5 for the purification of the exhaust gas condensate. For a return of the purified exhaust gas condensate in the fuel cell system 2 and in the high temperature section 12 of the fuel cell system 2, the valve assembly 6 is switched to a passage state in a third step, while a pressure gradient from upstream of the valve assembly 6 in the direction downstream of the valve assembly 6 prevails. The purified exhaust gas condensate is in the illustrated embodiment of the cleaning unit 5 in the
    Fuel cell system 2 recycled when in the fuel cell system 2 is a niedri gerer pressure than at the cleaning unit 5 and the return storage 9 is set. The passage state of the valve assembly 6 is set here depending on the operating state of the fuel cell system 2 and the level of the return storage 9 for the discontinuous recycling of the exhaust gas condensate to a predefined opening duration.
    The invention allows, in addition to the illustrated embodiments, further design principles. That is, the invention should not be limited to the embodiments shown in the figures.
    List of Reference Numerals 1a, 1b Exhaust gas aftertreatment system 2 Fuel cell system 3 Condensing section 4 Suction device 5 Cleaning unit 6 Valve arrangement 7 Collection section 8 Pump 9 Return storage 10 Flowmeter 11 Environment 12 High-temperature section 13 Venting valve 14 Outlet valve A Ambient pressure H High-pressure U Vacuum
    权利要求:
    Claims (12)
    [1]
    claims
    A exhaust gas aftertreatment system (1a, 1b) for a fuel cell system (2), comprising: a condensing section (3) for producing exhaust gas condensate from process exhaust gas of the fuel cell system (2), a catching section (7) downstream of the condensing section (3) for catching the generated exhaust gas condensate, - a suction device (4) for drawing process exhaust gas from the fuel cell system (2) in the Kondensierabschnitt (3) generating a negative pressure in the fuel cell system (2), - a cleaning unit (5) for cleaning the exhaust gas condensate produced downstream of the collecting section ( 7), and - a valve arrangement (6) for recycling purified exhaust gas condensate into the fuel cell system (2), wherein the valve arrangement (6) between a blocking state in which the return is blocked, and at least one passage state in which exhaust gas condensate by the negative pressure in the fuel cell system (2) is traceable, switchable.
    [2]
    2. exhaust aftertreatment system (1a, 1b) according to claim 1, characterized in that the collecting section (7) has a buffer memory for at least temporarily storing the collected exhaust gas condensate.
    [3]
    3. exhaust aftertreatment system (1a, 1b) according to one of the preceding claims, characterized in that downstream of the collecting section (7) and upstream of the cleaning unit (5) a pump (8) for pumping the exhaust gas condensate from the collecting section (7) in the cleaning unit ( 5) is arranged.
    [4]
    4. exhaust aftertreatment system (1a, 1b) according to any one of the preceding claims, characterized in that downstream of the cleaning unit (5) and upstream of the valve assembly (6) a return storage (9) for storing purified exhaust gas condensate is arranged.
    [5]
    5. exhaust aftertreatment system (1a, 1b) according to claim 4, characterized in that downstream of the return storage (9) and upstream of the valve assembly (6) a flow meter (10) for setting a defined recirculation amount of exhaust gas condensate in the fuel cell system (2) is arranged.
    [6]
    6. exhaust aftertreatment system (1b) according to one of claims 4 to 5, characterized in that the return storage (9) a vent valve (13) for venting the return storage (9) is arranged.
    [7]
    7. exhaust aftertreatment system (1b) according to any one of claims 4 to 6, characterized in that the return storage (9) an outlet valve (14) for the predefined discharge of purified exhaust gas condensate from the return storage (9) in the environment (11) of the return storage (9 ) is arranged.
    [8]
    8. Aftertreatment system (1a, 1b) according to any one of the preceding claims, characterized in that the condensing section (3) has a heat exchanger for generating the exhaust gas condensate.
    [9]
    9. Reactor system with an exhaust aftertreatment system (1a, 1b) according to any one of the preceding claims and a stationary fuel cell system (2), through which the process exhaust gas is generated.
    [10]
    10. A method for exhaust aftertreatment for a fuel cell system (2) with an exhaust aftertreatment system (1a, 1b) according to one of claims 1 to 8, comprising the steps: - sucking process exhaust gas from the fuel cell system (2) into the condensing section (3) through the suction device (4) generating a negative pressure in the fuel cell system (2), passing the generated exhaust gas condensate from the condensing section (3) to the purification unit (5) for purifying the exhaust gas condensate, and adjusting the valve arrangement (6) to the on-state during a pressure drop from upstream of the valve assembly (6) towards the downstream of the valve assembly (6).
    [11]
    11. The method according to claim 10, characterized in that the purified exhaust gas condensate from the cleaning unit (5) in the fuel cell system (2) is recycled while in the fuel cell system (2) a lower pressure than in and / or on the cleaning unit (5) and / or in and / or on the recycle memory (9) is set.
    [12]
    12. The method according to any one of claims 10 to 11, characterized in that the passage state of the valve assembly (6) for the discontinuous recycling of the exhaust gas condensate is set to a predefined opening duration.
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    同族专利:
    公开号 | 公开日
    DE112018006335A5|2020-08-27|
    WO2019113621A1|2019-06-20|
    CN111448696A|2020-07-24|
    AT520553B1|2019-05-15|
    JP2021507456A|2021-02-22|
    US20200335807A1|2020-10-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2010016006A|2009-10-21|2010-01-21|Mitsubishi Heavy Ind Ltd|Polymer electrolyte fuel cell system|
    EP2675008A1|2012-06-15|2013-12-18|Airbus Operations GmbH|Fuel cell system and method for operating a fuel cell system|
    WO2016165824A1|2015-04-14|2016-10-20|Proton Motor Fuel Cell Gmbh|Method and device for operating fuel cells by means of artificial air|
    JP2005183020A|2003-12-16|2005-07-07|Honda Motor Co Ltd|Feeder for generated water of fuel cell|
    CN101926038B|2008-01-23|2015-09-30|松下电器产业株式会社|Fuel cell system|DE102017115871A1|2017-07-14|2019-01-17|Elringklinger Ag|A fuel cell device and method of operating a fuel cell device|
    AT523398B1|2020-03-13|2021-08-15|Avl List Gmbh|Exhaust section of a fuel cell system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA51034/2017A|AT520553B1|2017-12-14|2017-12-14|Exhaust after-treatment system, reactor system and exhaust aftertreatment process for a fuel cell system|ATA51034/2017A| AT520553B1|2017-12-14|2017-12-14|Exhaust after-treatment system, reactor system and exhaust aftertreatment process for a fuel cell system|
    US16/772,783| US20200335807A1|2017-12-14|2018-12-14|Waste gas post-treatment system, reactor system and method for waste gas post-treatment for a fuel cell system|
    CN201880079331.5A| CN111448696A|2017-12-14|2018-12-14|Exhaust gas aftertreatment system, reactor system and exhaust gas aftertreatment method for fuel cell system|
    PCT/AT2018/060301| WO2019113621A1|2017-12-14|2018-12-14|Waste gas post-treatment system, reactor system and method for waste gas post-treatment for a fuel cell system|
    DE112018006335.6T| DE112018006335A5|2017-12-14|2018-12-14|EXHAUST GAS AFTER-TREATMENT SYSTEM, REACTOR SYSTEM AND METHOD FOR EXHAUST GAS AFTER-TREATMENT FOR A FUEL CELL SYSTEM|
    JP2020532768A| JP2021507456A|2017-12-14|2018-12-14|Waste gas aftertreatment systems, reactor systems and waste gas aftertreatment methods for fuel cell systems|
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