WO2025149687A2 - Dispositif d'alimentation en gaz et système de traitement de gaz - Google Patents

Dispositif d'alimentation en gaz et système de traitement de gaz

Info

Publication number
WO2025149687A2
WO2025149687A2 PCT/EP2025/060455 EP2025060455W WO2025149687A2 WO 2025149687 A2 WO2025149687 A2 WO 2025149687A2 EP 2025060455 W EP2025060455 W EP 2025060455W WO 2025149687 A2 WO2025149687 A2 WO 2025149687A2
Authority
WO
WIPO (PCT)
Prior art keywords
gas
regeneration
hydrogen
inert gas
supply device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2025/060455
Other languages
German (de)
English (en)
Other versions
WO2025149687A3 (fr
Inventor
Alexander Kuchler
Karsten Koch
Hermann Josef Weissacher
Thomas BALEANU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
M Braun Inertgas Systeme GmbH
Original Assignee
M Braun Inertgas Systeme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by M Braun Inertgas Systeme GmbH filed Critical M Braun Inertgas Systeme GmbH
Publication of WO2025149687A2 publication Critical patent/WO2025149687A2/fr
Publication of WO2025149687A3 publication Critical patent/WO2025149687A3/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J7/00—Apparatus for generating gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/14—Production of inert gas mixtures; Use of inert gases in general

Definitions

  • Various embodiments relate to a gas supply device and a gas process system.
  • high-purity inert gas is used, which is extensively filtered (also known as gas purification) to meet the inert gas purity requirements.
  • This process separates contaminants such as oxygen and/or moisture from the inert gas to increase the purity of the inert gas.
  • the filter becomes saturated, reducing its ability to separate the contaminant from the inert gas.
  • the saturated filter is either replaced or restored (also known as filter regeneration), for which a so-called regeneration gas from a compressed gas cylinder or other pressure vessel is conventionally used.
  • filter regeneration can be simplified.
  • pressure vessels e.g., assembly and disassembly
  • the availability of regeneration gas from pressure vessels may not always be reliable, making procurement expensive.
  • safety precautions vary greatly around the world and do not always meet requirements, which complicates global customer support.
  • the generation of regeneration gas is made possible at the filter site, eliminating the need for pressure vessels, increasing safety, and reducing dependence on external regeneration gas producers.
  • hydrogen gas is generated, which is used to form the regeneration gas, for example, by mixing the hydrogen gas with the inert gas that is already kept on hand for the application. Due to local generation, the hydrogen gas and the regeneration gas are consumed directly, which significantly reduces the total amount of hydrogen gas on site compared to the capacity of a pressure vessel.
  • the gas supply device used to mix the regeneration gas feature, among other things, a simple and cost-effective design without compromising on meeting stringent safety requirements. This also allows, among other things, cost-effective and safe retrofitting of existing systems.
  • the gas supply device is configured to mix the regeneration gas automatically (e.g., automatically), which reduces the risk of incorrect operation and the generation of flammable regeneration gas. This, in turn, simplifies operation and reduces personnel requirements.
  • Example 1 (e.g., a gas supply device) is configured according to one of the appended claims and/or comprises: an inert gas inlet for receiving inert gas; a feedstock inlet for receiving a feedstock; a hydrogen generator for releasing hydrogen gas from the feedstock; and a regeneration gas outlet (e.g., connection) for providing a regeneration gas for a filter device (e.g., for regenerating the filter device); optionally, a piping network (e.g., internal piping network).
  • the feedstock inlet can, for example, be in the be arranged inside the gas supply device (e.g. a chamber housing thereof), e.g. be designed to connect a storage container (e.g. water tank) integrated therein.
  • Example 2 is a method (e.g., for operating the gas supply device according to Example 1), comprising: releasing hydrogen gas from the starting material, e.g., by means of the hydrogen generator; regenerating a filter device by means of the hydrogen gas, e.g., by means of a regeneration gas comprising the hydrogen gas.
  • Example 3 is using a hydrogen generator (e.g., of Example 1 or 2) to generate hydrogen gas (e.g., by electrolysis and/or by releasing the hydrogen gas from the starting material), wherein a filter device is regenerated by means of the hydrogen gas (e.g., by means of a regeneration gas comprising the hydrogen gas).
  • a hydrogen generator e.g., of Example 1 or 2 to generate hydrogen gas (e.g., by electrolysis and/or by releasing the hydrogen gas from the starting material), wherein a filter device is regenerated by means of the hydrogen gas (e.g., by means of a regeneration gas comprising the hydrogen gas).
  • Example 4 is configured according to any one of Examples 1 to 3, wherein the starting material is a fluid, e.g., a liquid, and/or comprises (e.g., consists of) water; and/or wherein the regeneration gas comprises hydrogen gas. This reduces complexity and increases safety.
  • the starting material is a fluid, e.g., a liquid, and/or comprises (e.g., consists of) water; and/or wherein the regeneration gas comprises hydrogen gas. This reduces complexity and increases safety.
  • Example 6 is configured according to any one of Examples 1 to 5, wherein the hydrogen generator comprises or is formed from an electrolyzer, pyrolyzer, and/or a plasmalyzer.
  • the electrolyzer is particularly cost-effective to operate.
  • Example 11 is configured according to Example 10, further comprising: the inert gas inlet or an additional inert gas inlet of the filter device for receiving an inert gas, e.g. a process gas.
  • an inert gas e.g. a process gas.
  • Example 12 is configured according to example 10 or 11, wherein the filter device is configured to filter a process gas and/or wherein the filtering is carried out by means of (e.g. chemical) binding of at least one contaminant (e.g. oxygen) entrained with (e.g. mixed with) an inert gas.
  • contaminant e.g. oxygen
  • Example 18 is configured according to any one of Examples 10 to 17, wherein the process gas in a state leaving the filter device has a lower proportion of the impurity than in a state being supplied to the filter device.
  • Example 21 is configured according to any one of Examples 10 to 20, wherein the working device has a (e.g., gas-tight sealed) working area (e.g., a chamber interior).
  • a working area e.g., a chamber interior
  • Example 22 is configured according to any one of Examples 10 to 21, wherein the working device is configured to provide an atmosphere of a (e.g., filtered) service gas in the working area.
  • a (e.g., filtered) service gas e.g., filtered
  • Example 23 is configured according to any one of Examples 10 to 22, wherein the filter device is configured to filter the process gas of the working device flowing along a self-contained circuit coupling the filter device and the working device to each other.
  • Example 24 is configured according to any one of Examples 1 to 23, further comprising at least one actuator configured to (e.g., to be actuated and/or controlled in response thereto) bring the gas supply device and/or the conduit network into a separation mode or a regeneration mode and/or to influence (e.g., to interrupt) a fluid conduit path (e.g., of the conduit network) that opens into the filter device and/or the hydrogen generator.
  • Example 25 is configured according to example 24, comprising at least one actuator: one or more than one first actuator (e.g., valve) configured to influence a connection of the line network, optionally when a change occurs between the separation mode and the regeneration mode.
  • Example 26 is configured according to example 24 or 25, comprising at least one actuator: one or more than one second actuator (e.g., electrical switch) configured to influence a supply of electrical power (also referred to as power supply) to the hydrogen generator, optionally when changing between the separation mode and the regeneration mode, optionally such that: in the regeneration mode, the supply of electrical power to the hydrogen generator is performed; and in the separation mode and/or in a fault mode, the supply of electrical power to the hydrogen generator is interrupted.
  • a second actuator e.g., electrical switch
  • Example 28 is configured according to any one of Examples 1 to 27, further comprising a control device configured (e.g., partially integrated in the filter device and) to initiate a change between the separation mode and the regeneration mode, preferably by controlling the at least one actuator of the gas process system and/or by means of a regeneration signal.
  • a control device configured (e.g., partially integrated in the filter device and) to initiate a change between the separation mode and the regeneration mode, preferably by controlling the at least one actuator of the gas process system and/or by means of a regeneration signal.
  • Example 30 is configured according to example 29, wherein the criterion is implemented by the control device (e.g., stored) and/or represents a regeneration requirement of the filter device.
  • the control device e.g., stored
  • Example 31 is configured according to example 29 or 30, wherein the criterion is met if: a (e.g., sensor-detected) state of the filter device meets the criterion; an amount of the sorbent of the filter device and/or a resulting sorbate of the filter device meets the criterion; a period of time for which the separation mode lasts meets the criterion; and/or if the control device receives a regeneration signal.
  • a (e.g., sensor-detected) state of the filter device meets the criterion
  • an amount of the sorbent of the filter device and/or a resulting sorbate of the filter device meets the criterion
  • a period of time for which the separation mode lasts meets the criterion
  • the control device receives a regeneration signal.
  • Figure 2 shows a gas supply device according to various embodiments in a schematic structural diagram
  • Figure 3A shows a gas supply module according to various embodiments in a schematic perspective view
  • Figure 5A shows a gas process system according to various embodiments in a schematic layout diagram
  • gas refers herein to a gaseous material, e.g., a pure gaseous substance or a gas mixture. For some pure substances, their gaseous (e.g., molecular) state is expressed using the suffix "-gas,” such as “hydrogen gas” for hydrogen as a pure substance.
  • hydrogen gas refers to molecular hydrogen.
  • oxygen gas refers to molecular oxygen.
  • nitrogen gas refers to molecular nitrogen.
  • inert gas refers to a gas (e.g., a pure gaseous substance) that is unreactive under normal conditions and hardly participates (e.g., does not participate) in chemical reactions.
  • the inert gas is, for example, inert towards the filter device or at least its separation stages, e.g., the sorbent (also referred to as sorption agent).
  • the inert gas include: a noble gas (e.g., argon), nitrogen gas.
  • filtration generally refers to a separation process (also referred to as separation for short) by which two components of a mixture (e.g., a gas mixture) are separated from each other, e.g., by sorption (e.g., adsorption and/or absorption).
  • separation processes include a chemical separation process (e.g., by absorption) or a physical separation process (e.g., by adsorption).
  • Sorption refers to a binding process (also referred to as binding for short) that leads to an enrichment of a contaminant within a chemical phase (then also referred to as absorption) or at an interface between two chemical phases (then also referred to as adsorption).
  • sorbent also referred to as sorbent
  • sorbent is converted into a sorbate containing the bound contaminant by binding the contaminant (then also referred to as sorbent).
  • sorbent also referred to as sorbent
  • the process that occurs in reverse to sorption is stimulated, in which the sorbate is transferred back into the sorbent, releasing the contaminant.
  • electrolysis refers to a chemical process which is stimulated (e.g. forced) by the absorption of electrical power.
  • electrical power chemical energy is supplied to a starting material, whereby the starting material releases several reaction products into which the starting material For example, it is broken down.
  • One example involves the electrolysis of water (also referred to as water electrolysis), in which hydrogen and oxygen gases are released as reaction products.
  • the electrical power can be provided by a direct current source and fed to the so-called electrolyzer, in which the electrolysis takes place.
  • control device can be understood as any type of logic-implementing entity, which may, for example, include circuitry, instructions, and/or a processor capable of executing software stored in a storage medium, firmware, or a combination thereof, and issuing the instructions based thereon.
  • the control device may, for example, be configured using code segments (e.g., software) to provide various functions implemented by the code segments.
  • an actuator examples include: a shut-off device (e.g., a shut-off valve or butterfly valve), a throttle device (e.g., a gas flow regulator, pressure valve, or needle valve), a directional control valve, a drive device as an actuator (e.g., an electric motor, solenoid, or reciprocating piston), an electrical switch, or the like.
  • the control signal can, for example, be generated by means of a control device and/or transmitted via an electrical line.
  • An actuator can be part of a control chain, which has a corresponding infrastructure (e.g., a processor, storage medium, and/or bus system, or the like) to control the actuator based on a desired state as an input variable and to generate a corresponding electrical control signal representing the control variable.
  • the control chain can be implemented, for example, by means of the control device.
  • the term "monitoring" in the context of an operating parameter can be understood as a process in which the operating parameter is recorded as an actual state (e.g., the actual value of the operating parameter) and compared with a specification (e.g., a target state and/or criterion).
  • a signal can be generated based on the comparison. If, for example, the deviation of the actual state from the target state fulfills the criterion representing a fault state (then also referred to as a fault criterion), the signal representing the fault state can be generated.
  • the signal include: an electrical signal, an acoustic signal, an optical signal.
  • the signal can trigger a shutdown of the hydrogen generator, e.g., by interrupting the supply of electrical power to the hydrogen generator.
  • fluid lines may branch, but do not necessarily have to.
  • a line network 110 (see Example 25) with respect to the fluid lines, which is formed by the fluid lines and (if present) the actuators and provides the fluid line paths 110a, 110b, 110c.
  • Fig. 1B illustrates a gas process system according to various embodiments 100b in a schematic structural diagram, for example configured according to example 10 and/or comprising a gas supply device 156 according to embodiments 100a.
  • the filter device 152 can couple two control valves 164, 162, e.g., directional control valves, as actuators (or components thereof), by means of which the working path 160 can be interrupted, e.g., in the regeneration mode.
  • a fluid conduction path (then also referred to as a regeneration path) is provided in the regeneration mode from the regeneration gas outlet 106 through the filter device 152 to an outlet 114 (e.g., a disposal outlet), and in the separation mode, through the filter device 152 to the process gas outlet 124.
  • a joining device e.g. welding device
  • a process device which is designed to join (e.g. weld) using the process gas, e.g. to weld titanium, to carry out 3D printing using titanium, and/or to machine an aircraft engine;
  • Raw materials e.g. organics and/or dyes
  • An example configuration of the process gas atmosphere is inert and/or has a mass fraction of inert gas (e.g. argon and/or nitrogen gas) of more than 99%, e.g. more than 99.9% (corresponds to a purity of 1 N), e.g. more than approximately 99.99% (corresponds to a purity of 2 N), e.g. more than approximately 99.999% (corresponds to a purity of 3 N), e.g. more than approximately 99.9999% (corresponds to a purity of 4 N), e.g. more than approximately 99.99999% (corresponds to a purity of 5 N), e.g. more than approximately 99.99999% (corresponds to a purity of 6 N).
  • inert gas e.g. argon and/or nitrogen gas
  • a particularly compact example configuration of the gas process system has exactly one source 120 for the inert gas (also referred to as inert gas source).
  • the inert gas source 120 is connected to the inert gas inlet 108 of the gas supply device in order to supply the gas supply device in the regeneration mode with the Inert gas is supplied, which is mixed with the hydrogen gas to form the regeneration gas.
  • the inert gas source 120 is connected to the working path 160, e.g., by means of an inert gas inlet 118 branching off therefrom (if present) or by means of the filter device 108. This makes it possible to supply the filter device in the separation mode with a quantity of inert gas that replaces inert gas escaping from the working device 154.
  • inert gas sources of which a first inert gas source is connected to the inert gas inlet 108 of the gas supply device and a second inert gas source is connected to the inert gas inlet 118 branching off from the working path 160.
  • the inert gas source include: a gas cylinder or a building gas line in which the inert gas is arranged.
  • gas process system (optionally according to Example 62), which facilitates retrofitting an existing filter device with the gas supply device 156, has a modular design.
  • the gas supply device 156 is provided as a first module (then also referred to as the gas supply module) and the filter device is provided as a second module (then also referred to as the filter module).
  • the filter module and the gas supply module each have complementary connection couplings by means of which they can be coupled to one another.
  • the connection coupling of the gas supply module can provide the regeneration gas outlet 106, optionally the inert gas inlet 108, and optionally an electrical connection (then also referred to as a signal connection).
  • the line network (optionally according to Example 27) provides an inert gas path 110c as a fluid line path, which leads from the inert gas inlet 108 through the gas mixing element 240 to the regeneration gas outlet 106.
  • the line network further provides a hydrogen path as a fluid line path 110b, which leads from a hydrogen connection A2 of the electrolyzer 102 through the gas mixing element 240 to the regeneration gas outlet 106.
  • the line network further provides a regeneration gas path 110d as a fluid line path, which leads from the gas mixing element 240 to the regeneration gas connection 106 and from which a venting path 110e branches off as a fluid line path.
  • the venting path 110e opens into a venting actuator 230 and/or a safety valve 232.
  • the absorbed inert gas flow which is supplied to the regeneration gas outlet 106 along the inert gas path 110c, is influenced by means of a blocking actuator 228 (e.g., a shut-off valve) and/or an adjustment actuator 220 (e.g., comprising a needle valve and/or a gas flow regulator).
  • the blocking actuator 228 is controlled by means of a control signal generated according to the actual mode, which can be, for example, the regeneration mode or the separation mode. If the actual mode is the separation mode, the inert gas path 110c is interrupted (i.e., blocked) by means of the blocking actuator 228.
  • the water (then also referred to as supply water), driven by a pump 168, circulates in a closed circuit (then also referred to as supply circuit) through the electrolyzer 102.
  • the supply circuit has the fluid line path 110a (also referred to as water inlet), which leads from the water tank 166 to an inlet port A1 of the electrolyzer 102.
  • the water tank 166 can, for example, be connected, e.g., screwed, to the feedstock inlet 104.
  • the supply circuit has an additional fluid line path 252r (also referred to as water return), which leads from a return port A3 of the electrolyzer 102 to the water tank 166.
  • various sensors may be present to monitor the actual state of the gas supply device, e.g., one or more operating parameters thereof. Examples of these sensors include:
  • a second motor sensor 212 which is configured to detect the rotational speed of the fan 216 (e.g. a motor M thereof) as an actual operating parameter;
  • a water flow sensor 222 which is configured to detect a flow 202w of the supply water through the electrolyzer 102 as an actual operating parameter
  • a plurality of sensors as a second measuring element 218, which are configured to detect the actual state of the inert gas flow 202I as an actual operating parameter, e.g. the supply pressure of the inert gas to which the inert gas inlet 108 is exposed and/or the mixing pressure of the inert gas to which the gas mixing element 240 is exposed;
  • a pressure sensor 206 which is configured to detect the pressure in the safety housing 230 as an actual operating parameter.
  • the gas supply device may include a safety device (not shown) coupled to one or more of the sensors via a signal line 204, 214 for reading the sensor.
  • the safety device may be configured to implement one or more safety mechanisms using the sensors.
  • a first safety mechanism is configured to interrupt the electrical power supplied to the electrolyzer 102 when a fault condition is detected in order to interrupt the water electrolysis (also referred to as a fault mode).
  • An optional second safety mechanism is configured to emit an alarm signal (e.g., acoustic) when the fault condition is detected.
  • An example configuration of the water tank 166 and the gas mixing element 240 (e.g., their containers) are configured similarly and/or have a thread by means of which they can be positively connected to the respective ports. This reduces maintenance effort.
  • An example configuration for releasing hydrogen gas occurs at 351 by means of water electrolysis and/or in the regeneration mode.
  • An example configuration for regenerating the filter device occurs at 353 by chemically reducing the copper oxide of the filter device to copper, to which thermal energy is supplied by the heating device.
  • the copper oxide can be heated to more than 100°C (e.g., to a thermal decomposition temperature or at least above 500°C), but not above its melting temperature.
  • the two filter devices 152, 552 can be coupled to one another by means of a 4-2-way valve as control valve 164, which is configured to fluidly connect the one of the two filter devices 152, 552 which is in the separation mode to the working device 154, and to fluidly connect the other of the two filter devices 152, 552 which is in the regeneration mode to the gas supply device 156.
  • Fig. 5B illustrates the phases of a change sequence according to various embodiments 500b in a schematic flow diagram (see Example 32), according to which the transition from the separation phase to the regeneration phase takes place.
  • the process gas which essentially consists of the inert gas and contains oxygen and/or moisture as impurities, circulates through a glove box and the filter device.
  • the flow of the process gas through the glove box can, for example, be more than Fs . This promotes cost-effective gas cleaning.
  • the value Fs for the flow of the process gas through the glove box can be a function of the internal volume V of the glove box, for example so that a multiple (e.g. at least 10-fold) volume change occurs per hour.
  • V 1 m 3
  • two filter stages e.g., a copper filter stage
  • a copper filter stage is used to bind oxygen gas, one of which is always in separation mode. This enables continuous operation.
  • the filter stage in separation mode is saturated, it is switched to regeneration mode, and the other filter stage is switched to separation mode.
  • more than two filter stages can be used, which are switched to separation mode one after the other.
  • a heating device is provided per filter device, which supplies thermal energy to the filter stage(s) of the filter device when it is in the regeneration mode.
  • oxygen gas generated during water electrolysis is discharged into the safety enclosure, through which the safety atmosphere flows, which is provided by the ambient air. This inhibits a safety-relevant enrichment of oxygen gas in the Near the hydrogen generator.
  • water extracted from the water electrolysis also referred to as wastewater
  • the hydrogen gas is separated from the hydrogen gas and collected in the gas mixing tank. This facilitates a cost-effective and safe setup.
  • the pressure of the hydrogen gas and/or the regeneration gas is low and/or at least less than 2 bar (e.g., 1.5 bar absolute pressure or less). This reduces the requirements for components and tightness, which facilitates legal approval, simplifies operation, and saves costs.
  • the electrolyzer comprises several (e.g., three or more) electrolysis cells electrically connected in series (see example 61).
  • the series connection reduces the electrical current for a given electrical power generated by the electrolyzer. This also reduces the requirements for the infrastructure supplying the electrolyzer's electrical power (e.g., electrical cables and electrical generator), which saves costs and simplifies operation.
  • the electrolyzer has at least one proton-permeable polymer membrane (PEM) per electrolysis cell, which provides the electrolysis cell (then also referred to as a PEM cell).
  • PEM proton-permeable polymer membrane
  • the PEM cell is inexpensive, low-maintenance, and easy to operate. For example, the PEM cell requires no pressure build-up and is therefore immediately ready for use. There is no run-on time or venting required, and it can be started at room temperature.
  • the wastewater is not recycled into the water electrolysis process but disposed of.
  • an open end of the water circuit is provided at the outlet of the electrolyzer. This inhibits the mixing of oxygen gas and hydrogen gas and is more cost-effective to implement than a closed water circuit, which recirculates the condensate water into the supply water, thus requiring additional safety precautions.
  • the containment enclosure is a pressure chamber in which overpressure is generated by introducing air into the containment enclosure using a fan (also referred to as a blower).
  • the volume flow of air introduced into the containment enclosure is greater than the volume flow of hydrogen gas generated by the hydrogen generator (e.g., ten times, one hundred times, or more). This guarantees sufficient dilution, even if all of the hydrogen gas escapes due to a leak. If the containment enclosure door is open or a leak is detected by a sensor, the hydrogen generator is automatically deactivated, e.g., by interrupting the electrical power supply.
  • the overpressure can, for example, be 10 millibars above the hydrostatic pressure of the Earth's atmosphere (also referred to as atmospheric pressure) at the location of the hydrogen generator.
  • the overpressure is manually adjusted once using a mechanical gas outlet throttle, which allows the use of an unregulated blower, thus saving costs.
  • the fan and the gas outlet throttle are protected by a grille, which increases operational safety.
  • the fan can be equipped with a dust filter, which increases operational safety.
  • the regeneration gas and the process gas are identical in the inert gas. This allows for the omission of purging of the filter device during gas exchange, which saves gas, time, and thus costs.
  • argon can be used as an inert gas in the regeneration gas and the process gas. Small amounts of nitrogen gas can already interfere in an Ar-based application.
  • the process gas supplied to the filter device in the separation mode is used in the regeneration mode to Hydrogen gas is mixed with the regeneration gas. This further simplifies the design and/or prevents the filter device from being exposed to pressure fluctuations.
  • the process gas which has a pressure between 5-6 bar, is fed to the filter device and/or the gas supply device.
  • the regeneration gas leaving the filter device is disposed of, e.g., via a disposal outlet.
  • the regeneration signal (e.g., having 24 volts) by which the control valves are controlled is branched off from one of the control valves and fed to the gas supply device. This simplifies the design and thus reduces costs.
  • the hydrogen generator is started, e.g., according to the switching sequence. If the regeneration signal is switched off, the hydrogen generator is stopped, e.g., according to a reverse switching sequence.
  • checking the water supply can optionally be omitted.
  • the storage container and/or the gas mixing element are provided by means of a bottle that is screwed in (then also referred to as a screw-in bottle).
  • a bottle that is screwed in is also referred to as a screw-in bottle.
  • This is cost-effective and can be scaled with little effort.
  • a screw-in bottle with a 1-liter capacity can be exchanged for one with a larger or smaller capacity without having to change the design of the gas supply device.
  • the safety of the gas supply device is increased cost-effectively by means of:
  • an intervention protection for the manually adjustable valves which are designed to influence the chemical composition of the regeneration gas (e.g. safety valve and/or adjustment actuator);
  • a measuring chain by means of which safety-relevant operating parameters are monitored by sensors, e.g. the water pressure in the electrolyzer, the pressure of the hydrogen gas at the outlet of the electrolyzer and/or in the gas mixing vessel, the pressure of the safety atmosphere; and a control unit which triggers an interruption of the electrical power supplied to the electrolyzer if the measuring chain determines that the actual state of at least one of the monitored operating parameters exceeds or falls below a threshold value.
  • sensors e.g. the water pressure in the electrolyzer, the pressure of the hydrogen gas at the outlet of the electrolyzer and/or in the gas mixing vessel, the pressure of the safety atmosphere
  • each of the following applications provided by the working device comprising an enclosure is particularly suitable to be supplied by the inert gas from the filter device:
  • a glove box which is provided e.g. by means of the enclosure;
  • Li-ion batteries or components thereof e.g. in the enclosure.
  • a hydrogen-inert gas mixture is used as a regeneration gas for the regeneration of several reactors used for gas purification.
  • the commercially available hydrogen-inert gas mixture is usually supplied in pressurized gas cylinders, which increases costs but, in particular, limits availability.
  • the required hydrogen gas volume flow is generated directly using a PEM electrolysis cell (also referred to as a PEM cell for short) and immediately mixed (i.e., diluted) with an inert gas (e.g., nitrogen or argon), so that a safety-relevant enrichment of hydrogen gas cannot occur at any time.
  • an inert gas e.g., nitrogen or argon
  • one or more reactors are regenerated using a regeneration gas containing hydrogen gas.
  • the standard volume flow of the regeneration gas is 20 l/min.
  • the regeneration gas mixture meets at least the requirements for the regeneration of systems with a volume flow capacity of up to 60 m3 /h.
  • the regeneration gas has a hydrogen gas content of a maximum of 5 vol%. This inhibits its flammability. This results in a volume flow of hydrogen gas generated by the electrolyzer of a maximum of 1 l/min.
  • hydrogen gas is generated using an electrolyzer (e.g., having one or more PEM electrolysis cells).
  • the electrolyzer is supplied with water by a direct current diaphragm pump, which supplies the electrolyzer with a water flow rate of approximately 1 l/min.
  • the water is withdrawn from the storage tank by the pump and fed to a dedicated inlet port (also referred to as the H2O inlet) of the electrolyzer.
  • the water leaves the electrolyzer together with the oxygen gas generated during water electrolysis at the return port (also referred to as the O2 outlet) of the electrolyzer and is returned to the storage tank.
  • the proportion of water that is decomposed by the electrolyzer is 0.8 ml/min (milliliters per minute). The remaining proportion of water can contribute to cooling the electrolyzer.
  • a laboratory glass bottle (e.g., 1 liter capacity) is used as a storage container.
  • the laboratory glass bottle is removed from the feedstock inlet (e.g., its screw cap) for filling and emptying.
  • a flexible combination probe protrudes from the top of the laboratory glass bottle to measure the conductivity, temperature, and fill level of the stored water in the laboratory glass bottle.
  • the hydrogen connection (also referred to as the H2 outlet) of the electrolyzer is fluidly coupled to an additional laboratory glass bottle (e.g., 1 liter capacity) as the container for the gas mixing element, in which the water droplets are separated.
  • the additional laboratory glass bottle is also mounted in a removable manner so that it can be emptied by the operator after regeneration.
  • the hydrogen gas is mixed with inert gas (e.g., nitrogen gas) to form the regeneration gas.
  • inert gas e.g., nitrogen gas
  • the flow of inert gas into the additional laboratory glass bottle can be controlled using a needle valve as an adjustment actuator. Once adjusted, this valve is generally only readjusted in the event of a fault or during maintenance.
  • the needle valve couples the additional laboratory glass bottle to the inert gas inlet, to which, for example, the inert gas source connected to the filter device is connected.
  • the pressure provided by the inert gas source (for example, approximately 6 bar above atmospheric pressure) is reduced to approximately 0.5 bar above atmospheric pressure, which then becomes the pressure of the regeneration gas. This ensures that the flow of the regeneration gas through the filter device is sufficiently invariant with respect to fluctuations in the backpressure in the filter device, making it possible to do without an additional pressure or flow regulator, thus saving costs.
  • a deviation of the actual chemical composition of the regeneration gas from the desired chemical composition is minimized.
  • the pressure of the inert gas to which the gas mixing element and/or the inert gas inlet 108 is exposed is monitored by means of the second measuring element.
  • the second measuring element has two pressure switches, which are exposed to inert gas flowing from the inert gas inlet to the gas mixing element.
  • the two pressure switches are used to monitor whether the pressure of the inert gas is within a range between a minimum pressure and a maximum pressure as a specified interval.
  • the switches respond, for example, in the event of a blocked regeneration gas connection or similar errors.
  • the electrolyzer e.g., its PEM cell
  • the electrolyzer is supplied with electrical power by means of a direct current constant current source, which, for example, supplies an electrical voltage in a range between 3 volts (V) (e.g., 10 V) and 20 V and/or an electrical current in a range between 10 amperes (A) and 100 A for the power supply.
  • V 3 volts
  • A 10 amperes
  • the power supply e.g., current supply
  • a fault condition (then also referred to as a malfunction) being detected.
  • the fault condition is determined when at least one safety-relevant operating parameter exceeds the fault criterion
  • the electrolyzer can consume an electrical power in a range between 100 watts and 500 watts during operation, e.g., approximately 220 watts.
  • the failure criterion is met if the inert gas pressure, as a safety-relevant operating parameter, is less than a specified value, e.g., the minimum pressure, and/or greater than a specified value, e.g., the maximum pressure.
  • the failure criterion is met if it is determined that the gas delivery device has failed or is impaired (e.g., by means of the second motor sensor).
  • the safety device is provided by means of a relay interconnection as a switching circuit.
  • the switching circuit implements the monitoring of the operating parameters of the gas supply device. This allows for cost-effective implementation, since no programmable logic controller (PLC) is required as a safety device.
  • PLC programmable logic controller
  • the visualization and/or influencing of the operating parameters of the gas supply device, which are not safety-relevant, for example, is carried out using a system that has a miniature PLC and a display for displaying the most important operating parameters.
  • the regeneration phase in which the regeneration gas is generated, is initiated by the regeneration signal generated by the filter device, e.g., by its control unit.
  • the regeneration signal is a 24 V signal, by means of which the control valves (e.g., in the valve block) are controlled.
  • the safety device, the hydrogen generator, the gas mixing element, and the storage container are arranged in a gas-tight safety housing.
  • a fan continuously supplies sufficient ambient air to the safety housing, which exits at exactly one air outlet of the safety housing (e.g., throttled). This promotes the safety pressure in the safety housing to be an overpressure, for example, a maximum of approximately 50 mbar (millibars) above atmospheric pressure.
  • This safety pressure is monitored by a pressure switch, which facilitates blower failure detection.
  • the volume flow of the ambient air through the safety housing is configured such that, even if the maximum possible amount of the generated hydrogen gas escapes directly into the safety housing, a safety-relevant enrichment of hydrogen gas is inhibited.
  • the volume flow of the ambient air through the safety housing can, for example, be at least approximately 50 l/min (which corresponds to approximately 3 cubic meters per hour).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

Selon divers modes de réalisation, un dispositif d'alimentation en gaz (156) comprend : une entrée de gaz inerte (108) pour recevoir un gaz inerte; une entrée de matériau de départ (104) pour recevoir un matériau de départ; un générateur d'hydrogène (102) pour libérer de l'hydrogène gazeux du matériau de départ; et une sortie de gaz de régénération (106) pour fournir un gaz de régénération pour un dispositif de filtre; le dispositif d'alimentation en gaz (156) étant conçu pour générer le gaz de régénération par mélange de l'hydrogène gazeux généré avec le gaz inerte.
PCT/EP2025/060455 2024-11-20 2025-04-15 Dispositif d'alimentation en gaz et système de traitement de gaz Pending WO2025149687A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102024134148 2024-11-20
DE102024134148.3 2024-11-20

Publications (2)

Publication Number Publication Date
WO2025149687A2 true WO2025149687A2 (fr) 2025-07-17
WO2025149687A3 WO2025149687A3 (fr) 2025-09-04

Family

ID=95481748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/060455 Pending WO2025149687A2 (fr) 2024-11-20 2025-04-15 Dispositif d'alimentation en gaz et système de traitement de gaz

Country Status (1)

Country Link
WO (1) WO2025149687A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012209961A1 (de) * 2012-01-11 2013-07-11 Robert Bosch Gmbh Verschließbare Einheit für einen Isolator oder Reinraum
WO2018074460A1 (fr) * 2016-10-17 2018-04-26 ヤマハファインテック株式会社 Dispositif d'alimentation en gaz mixte
PL241425B1 (pl) * 2019-02-08 2022-09-26 Droździk Radosław Felicitas A-C Kontenerowa stacja wytwarzania i dystrybucji wodoru
JP7485287B2 (ja) * 2020-10-05 2024-05-16 株式会社デンソー 水素発生装置

Also Published As

Publication number Publication date
WO2025149687A3 (fr) 2025-09-04

Similar Documents

Publication Publication Date Title
DE69712557T2 (de) Verfahren und Vorrichtung zur Speicherung von Ozon
DE3149681C2 (de) Vorrichtung zur intermittierenden Ozoneinspeisung
DE102012018846B4 (de) Gasdispersionsvorrichtung, Anlage und Verfahren zur örtlich begrenzten Sterilisation
DE202024106709U1 (de) Gasversorgungsvorrichtung und Gasprozesssystem
DE3806998C2 (de) Steuereinheit für unter Druck stehende Gase
EP0950268A1 (fr) Procede de reconnaissance de fuites de gaz dans une installation a cellules electrochimiques avec des electrolytes polymeres, et installation a cellules electrochimiques
AT521823B1 (de) Ermittlung des Massenstromes eines Abgasbestandteils einer Brennstoffzelle
DE69735470T2 (de) System zur Gasrückgewinnung
EP1787348B1 (fr) Systeme de piles a combustible
EP2371023B1 (fr) Procédé et dispositif pour évacuer les agents de fonctionnement usés et, en partie, explosifs d'une pile à combustible
EP0925614B1 (fr) Procede permettant de faire fonctionner une installation a piles a combustible, et installation a piles a combustible concernee
EP2894704A1 (fr) Pile à combustible
EP3799667A1 (fr) Procédé de traitement de gaz résiduels provenant de piles à combustible contenant de l'hydrogène et de l'oxygène, et système de traitement de gaz résiduels
WO2025149687A2 (fr) Dispositif d'alimentation en gaz et système de traitement de gaz
EP1547184A2 (fr) Systeme de pile a combustible comportant un circuit de refroidissement
DE10253281A1 (de) Elektrochemisches Zelldruckregulationssystem und Verfahren zum Einsatz desselben
DE112006000222T5 (de) Brennstoffzellenbetriebsverfahren und Vorrichtung dafür
WO2023001421A1 (fr) Procédé d'exploitation d'une installation d'électrolyse et installation d'électrolyse
AT523896B1 (de) Prüfstandsystem zum Prüfen von zumindest einer Brennstoffzelle
EP4728122A1 (fr) Système électrochimique
WO1997010172A1 (fr) Procede et dispositif pour separer de l'hydrogene d'un melange gazeux
DE102014103554B4 (de) Verfahren und Vorrichtung zur Gewinnung von Stickstoff aus Luft
DE19522596C2 (de) Vorrichtung zur Rückgewinnung und/oder Reinigung von kontaminierten Schmierölen
DE102015210120A1 (de) Vorrichtung zur Ozonbehandlung mit einem Ozonvernichter
DE112006002861B4 (de) Brennstoffzellensystem