WO2012152930A1 - Underwater vehicle internal assembly fitted with a system for treating ambient gas and associated treatment method - Google Patents

Underwater vehicle internal assembly fitted with a system for treating ambient gas and associated treatment method Download PDF

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Publication number
WO2012152930A1
WO2012152930A1 PCT/EP2012/058801 EP2012058801W WO2012152930A1 WO 2012152930 A1 WO2012152930 A1 WO 2012152930A1 EP 2012058801 W EP2012058801 W EP 2012058801W WO 2012152930 A1 WO2012152930 A1 WO 2012152930A1
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WIPO (PCT)
Prior art keywords
nitrogen
adsorber
rich
ambient gas
oxygen
Prior art date
Application number
PCT/EP2012/058801
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French (fr)
Inventor
Nicolas Piganeau
Original Assignee
Dcns
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
Priority to FR1154121A priority Critical patent/FR2975075B1/en
Priority to FR1154121 priority
Application filed by Dcns filed Critical Dcns
Publication of WO2012152930A1 publication Critical patent/WO2012152930A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63GOFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/36Adaptations of ventilation, e.g. schnorkels, cooling, heating, or air-conditioning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63JAUXILIARIES ON VESSELS
    • B63J2/00Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/02Ventilation; Air-conditioning
    • B63J2/04Ventilation; Air-conditioning of living spaces

Abstract

This assembly comprises a chamber (40) delimiting an internal volume (24) containing an ambient gas and a system (42) for treating the ambient gas. The treatment system (42) comprises an upstream inlet (68) for drawing off ambient gas from the chamber (40), a device (51) for treating the ambient gas and an assembly (50) for conveying the ambient gas from the upstream inlet (68) towards the treatment device (51). The treatment device (51) comprises at least one nitrogen generator (52) capable of generating a nitrogen‑rich treated stream and an oxygen‑rich discharge stream from the ambient gas tapped off. The treatment system (42) comprises a purge assembly (54) connected to the nitrogen generator (52) to discharge the nitrogen‑rich stream to the exterior of the underwater vehicle (10).

Description

gear set inside submarine provided with an ambient gas processing system and associated method of treatment

The present invention relates to an internal set of the underwater vehicle, of the type comprising:

- an enclosure defining an interior volume containing a background gas;

- a processing system of the ambient gas, the processing system comprising:

o an upstream inlet of ambient gas sample in the chamber;

o a processing device of the ambient gas;

o a conveyor assembly of the ambient gas from the upstream input to the processing device.

Such inner assembly is intended to equip in particular a military submarine carrying a crew. In particular, the inner assembly is intended to be arranged in a conventional submarine devoid of nuclear propulsion.

Conventional submarines are usually propelled by an internal combustion engine such as a diesel.

To enable immersion of the submarine during a substantial period of time, it is necessary to provide a processing system to renew the oxygen present in edge of the inner volume delimited by the pressure hull of the submarine.

In conventional submarines, it is known to ventilate the interior of the submarine when charging snorkeling submarine engine.

This is very indiscreet, since it requires the engine start-up in the vicinity of the surface for a significant time, in the order of 10 minutes.

However, this method is commonly used on conventional submarines, as the submarine's batteries must be recharged periodically.

Alternatively, for longer dives underwater, it is known to embed candlelight oxygen to provide additional oxygen when it is not possible to come to the surface to conduct air exchange . These candles are initiated pyrotechnically and give off oxygen. However, the release of oxygen is small compared to the volume and the mass of each candle. Such candles are also expensive and may present risks of use, including diving.

In conventional submarine with an independent propulsion of air (or AlP), it is known to periodically withdraw a portion of the stored oxygen for the purposes of propulsion AlP. However, these withdrawals diminish accordingly autonomy propulsion immersion. In submarines with nuclear propulsion, it is known to use a plant for producing oxygen that works for example by electrolysis of seawater to extract oxygen. Such a plant is, however, heavily consuming electrical energy, and therefore can not be implemented in a conventional submarine.

Also known submarine having oxygen storage in liquid or gaseous form, in particular to provide independent propulsion of air (AIP). Such storages are difficult to implement in a submarine, and require many precautions, given the confined space of the submarine. In addition, the handling of these storage facilities are complex and high cost, and are very cumbersome.

An object of the invention is therefore to obtain an inner set of underwater vehicle that offers periodic renewal of the atmosphere in the interior of the submarine, while having a low energy consumption and a lack of consumables.

To this end, the invention provides an assembly of the aforementioned type, characterized in that the processing device comprises at least one nitrogen own generator for generating a rich stream treated in nitrogen and a discharge stream rich in oxygen taken from the ambient gas, the processing system comprising a purge assembly connected to the nitrogen generator for discharging the nitrogen-rich stream to the outside of the underwater vehicle.

The assembly according to the invention may comprise one or more of the following characteristics, taken in isolation or in any technically possible combinations:

- the conveyor assembly includes an upstream compressor;

- the nitrogen generator comprises a first adsorber and a second adsorber is connected in parallel of the first adsorber, the nitrogen generator having an own control unit to selectively pressurize the first adsorber and the second adsorber so that in a first configuration, first adsorber to produce the nitrogen-rich stream treated, and the second adsorber occurs the discharge of oxygen-rich stream, and in a second configuration, the first adsorber to produce the rich stream discharge in oxygen and the second adsorber to produce the treated stream rich in nitrogen.

- the first adsorber and the second adsorber comprises a clean adsorbent material selectively adsorb oxygen at a first high pressure, the adsorption material being and adapted to release oxygen adsorbed to a second low pressure lower than the first high pressure. - the first adsorber and the second adsorber contain a clean adsorbent material selectively adsorbing nitrogen at a first high pressure, the adsorption material being capable of releasing nitrogen at a second low pressure lower than the first high pressure .

- the nitrogen generator is a membrane generator.

- the purge assembly comprises a downstream compressor connected to the nitrogen generator, for compressing the stream rich treated nitrogen, purge assembly comprising means for storing the compressed current Treaty.

- the purge assembly includes a purge conduit for lead outside of the underwater vehicle, the drain conduit being provided with at least one bleed valve.

- the drain conduit is arranged at least partially over the chamber to open into a gas volume located above the enclosure when the underwater vehicle is at least partially immersed.

- leads the purge opens opposite the enclosure or within the enclosure to result in a volume of water.

The invention also relates to an assembly underwater, characterized in that it comprises an inner assembly as described above.

The invention also relates to a packaging method of the ambient gas in the interior volume of an inner assembly as described above, of the type comprising the steps of:

- progressive evacuation of the ambient gas from the interior volume, the evacuation step of removal of an ambient gas stream through the upstream inlet, the conveying of the ambient gas stream to nitrogen generator by entire conveyor, the formation of a nitrogen-rich stream treated, and the formation of a discharge stream rich in oxygen in the nitrogen generator, the pressure in the internal volume progressively decreases;

- balancing the pressure in the interior volume by injecting an outer oxygen-rich stream into the interior.

The method according to the invention may comprise one or more of the following characteristics, taken in isolation or according to all technically possible combinations:

- the nitrogen generator comprises a first adsorber and a second adsorber is connected in parallel of the first adsorber, the nitrogen generator having an own control unit to selectively pressurize the first adsorber and the second adsorber, the evacuation step having a first phase output of the current nitrogen-rich processed by the first adsorber, and the discharge of oxygen-rich stream by the second adsorber, then a second phase of production of current nitrogen-rich processed by the second adsorber, and current oxygen-rich discharge by the first adsorber.

- it comprises a step of purging the nitrogen rich stream generated by the generating processing, the purge step being performed during the balancing step, the nitrogen-rich stream produced by the nitrogen generator is advantageously stored in a storage means of the purge assembly during the evacuation step.

- it comprises a step of purging the nitrogen rich stream produced by the entire nitrogen generation, the purge step being performed in a body of water when the underwater vehicle is immersed.

The invention will be better understood from reading the following description given purely by way of example and with reference to the accompanying drawings, wherein:

- Figure 1 is a schematic sectional view taken along a median vertical plane of a first underwater vehicle according to the invention;

- Figure 2 is a schematic view of the internal assembly of the invention of the machine of Figure 1;

- Figure 3 is a functional block diagram of a nitrogen generator present in the assembly of Figure 2 in a first operating configuration;

- Figure 4 is a view similar to Figure 3 in a second operating configuration.

In what follows the pressures are expressed in bar absolute, unless otherwise specified.

A first underwater vehicle 10 according to the invention is illustrated in Figure 1. This device 10 is advantageously a conventional submarine without means of nuclear propulsion.

The craft submarine 10 comprises in known manner an inner pressure hull 12, and an outer shell 14 defining the pressure hull 12 with at least one ballast 16.

The craft submarine 10 comprises a solid 18 projecting above the outer hull 14, a propulsion unit 20 and an inner assembly 22 defining an interior gas volume 24 for receiving a crew.

The propeller assembly 20 comprises in particular an internal combustion engine 25 such as a diesel engine. Conventionally, the propulsion assembly 20 further comprises a snorkel tube 26 extending through the mass 18 and then to the motor 25 to power the motor 25 outside gas, when the instrument 10 navigates by being immersed . The propulsion assembly 20 further includes an alternator for charging batteries 28.

The inner assembly 22 includes a housing 40 defining a substantially sealed manner the interior volume 24, the enclosure 40 containing an ambient gas. The inner assembly 22 also comprises a system 42 for processing the ambient gas present in the chamber 40. As discussed below, the processing system 42 is adapted to capture a portion of the nitrogen present in the ambient gas to place the inner volume 24 under a slight vacuum and then releasing the nitrogen sensed outside of the underwater vehicle 10 during a purge step.

The inner assembly 22 further comprises a supply conduit an oxygen-rich gas outside to balance the pressure in the interior volume 24. The outer gas is for example the ambient air present around the machine sub marine 10 when the device 10 floats on the surface of the water. The supply conduit is advantageously formed by the tube or snorkel 26 is connected to the tube 26.

The chamber 40 is for example delimited by the thick shell 12 or by a wall disposed in the pressure hull 12.

The processing system 42 includes a set 50 of sampling and conveying ambient gas, a processing device 51 comprising a nitrogen generator 52 and a set 54 of purge nitrogen recovered.

The processing system 42 further comprises preferably a duct 56 for recycling ambient treated gas into the chamber 40.

As shown in Figure 2, the entire collection and conveyor 50 comprises a sampling conduit 60 and an upstream compressor 62. It comprises optionally an upstream filter 64 and an upstream storage 66 of compressed ambient gas.

The upstream pipe 60 opens upstream in the interior volume 24 by an upstream inlet 68. It connects the upstream inlet 68 to the compressor 62.

The compressor 62 is adapted to compress the ambient gas drawn into the interior volume 24 substantially at atmospheric pressure to a pressure higher than 5 bar and in particular between 7 bars and 10 bars.

The compressor 62 outputs a compressed ambient gas. The filter 64 is adapted to purify the compressed ambient gas, for removing particular impurities and optionally part of the water it contains. The upstream storage 66 is for example formed by a ball capable of containing the ambient gas pressure when the processing device 51 is not functional.

According to the invention, the processing device 51 has a nitrogen generator 52, to produce a stream rich in nitrogen and treated an oxygen-rich discharge stream.

By "nitrogen-rich" means that the treated stream has a nitrogen content greater than that of the ambient gas introduced into the generator, and for example greater than 99 mol%.

By "oxygen-rich" means that the discharge current has a higher oxygen content than the ambient gas introduced into the generator 52. The oxygen content in the oxygen-rich discharge stream is for example greater than 28% molar.

The nitrogen generator 52 is for example of the pressurized adsorption type and including pressure swing adsorption, designated by the term "pressure swing adsorption".

It comprises at least one adsorber 70A, 70B to own function following an adsorption configuration to an adsorption pressure in the adsorber which selectively adsorbs a gas contained in a gas mixture and a desorbing configuration, to a lower pressure, wherein the sorbate gas is released.

As shown in Figure 3 or Figure 4, the generator 52 includes a first adsorber and a second adsorber 70A 70B mounted parallel to the first adsorber 70A. It further comprises a valve manifold 72 and a control unit 74 adapted to control the distributor 72 between a first adsorption configuration in the first adsorber 70A and a second adsorption configuration in the second adsorber 70B which will be described in detail lower.

The nitrogen generator 52 is for example a generator sold by INNOVATIVE GAS SYSTEMS under the trademark NITROSWING ®.

Each adsorber 70A, 70B comprises a tank 76A, 76B containing an adsorbent material 77.

In a first embodiment, the adsorbent material 77 is adapted to selectively capture the oxygen present in an ambient gas containing in particular nitrogen and oxygen without significantly capture nitrogen at a high pressure P1 greater than atmospheric pressure, and in particular equal to the pressure of the compressed ambient gas received from the set of conveyor 50. the adsorbent material 77 is also adapted to release the oxygen captured at a low pressure P2 lower than the high pressure P1, by example substantially equal to atmospheric pressure.

In this example, the adsorbent material is formed by a divided material such as a molecular sieve containing atoms. The divided material is for example a porous material. More generally, the adsorbent material is selected from activated carbons, silica gels, alumina or zeolites.

The adsorption surface defined by the material 77 is e.g. more than several square meters, in particular of the order of several hundred square meters. The affinity of the adsorbent material 77 with the adsorbed gas is, for example chemical or physical nature, in particular depending on the size of the pores contained in the adsorbent material.

Alternatively, the adsorbent material 77 is preferably adapted to capture the nitrogen present in the gas mixture without significantly capture the oxygen present at the high pressure P1. The adsorbent material 77 is capable of releasing nitrogen sensed at the low pressure P2 lower than the high pressure P1.

The valve manifold 72 includes an inlet conduit 78 connected to the output of the entire conveyor 50, a first upstream conduit 80A and a second 80B upstream pipe. 80A and 80B pipes connect the inlet conduit 78 to the first adsorber 70A respectively and the second adsorber 70B. Each upstream pipe 80A, 80B is provided with an upstream valve 82A, 82B.

The downstream manifold 72 further comprises a first downstream conduit 84A and a second downstream pipe 84B which converge in a pipe 86 for discharging the nitrogen-rich stream.

The downstream pipes 84A and 84B are respectively provided with a first downstream valve 88A and a second downstream valve 88B.

The dispenser 72 further comprises a first recirculation stitching 90A and a second stitching 90B converging recirculation in the return line 56 for discharging the oxygen-rich stream.

The first stitching 90A is stitched on the first upstream conduit 80A, preferably downstream of the upstream valve 80A. It is provided with a first recirculation valve 92A.

The second tapping 90B is stitched on the second pipe 80B upstream, preferably downstream of the upstream valve 82B. It is provided with a second recirculation valve 92 B. As will be described in detail below, the control unit 74 is capable of controlling the various valves 82A, 82B; 84A, 84B; 92A, 92B between a first adsorption configuration in the first adsorber 70A and desorption in the second adsorber 70B, and a second adsorption configuration in the second adsorber 70B and desorption in the first adsorber 70A.

Referring to Figure 2, the purge assembly 54 comprises a downstream compressor 100 for compressing the nitrogen-rich stream formed in the generator 52, a purge line 102 connected to another outlet of the downstream compressor 100, and a set storage 104 temporarily nitrogen.

Optionally, the vent assembly 54 comprises a downstream buffer tank 106 upstream 100 of the downstream compressor.

Downstream the compressor 100 is connected upstream to the generator 52, in particular to the discharge line 86 of the nitrogen-rich stream.

It is adapted to compress the nitrogen-rich stream flowing in line 86 to a high pressure greater than the pressure in the generator 52.

The pressure at the outlet of the downstream compressor 100 is greater than the immersion pressure, and may in particular be greater than 200 bar and in particular of the order of 250 bars.

The compressor 100 includes an outlet pipe 107 provided with a non-return valve 108.

The purge conduit 102 is tapped from the outlet conduit 107 downstream of the check valve 108.

It comprises a bleed valve 1 10 and a normally closed valve device 1 12. In the example shown in solid lines in Figure 2, the bleed conduit 102 is adapted to open to the outside of the underwater vehicle , either underwater or above the surface.

The storage unit 104 comprises at least one tank 1 14 nitrogen under pressure connected to the outlet conduit 107 downstream of the compressor 100. Each container 1 14 has a volume greater than that of the buffer tank 106 when present. This volume can be in the order of several hundred liters, for example about 400 liters.

A method of treatment of the ambient gas in the interior volume 24 of the inner assembly 22 will now be described.

Initially, in a first phase, the underwater vehicle 10 is submerged. During this phase, the interior volume 24 is occupied by the crew. The amount of oxygen present in the interior volume 24 thus gradually decreases.

During this phase, the processing system 42 is activated. For this purpose, the compressor 62 is started to collect a given amount of ambient gas in the interior volume 24 through the inlet 68 and upstream of the sampling line 60.

This sample is taken either continuously or at regular intervals. The pressure in the interior volume 24 therefore decreases gradually as and when the levy.

The ambient gas taken by the upstream compressor 62 is then compressed to a pressure higher than 5 bars, and in particular of the order of 10 bars.

The compressed ambient gas is then introduced into the nitrogen generator 52 through the inlet pipe 78.

In a first configuration of the generator 52, the first adsorber 70A operates in adsorber while the second adsorber 70B desorbs and regenerates.

In this configuration, the upstream control unit 74 opens valve 82A, 82B to allow the passage of the compressed ambient gas to the first adsorber 70A and prohibit the passage of fluid from the inlet conduit 78 to the second adsorber 70B.

The compressed ambient gas thus enters the vessel 76A of the first adsorber 70A. The oxygen present in the ambient gas is adsorbed at least in part in the adsorbent material 77, thereby forming a nitrogen-rich stream.

The control unit 74 maintains the open outlet valve 88A. The nitrogen-rich stream flows into the first upstream conduit 80A and in the discharge line 86.

A portion of the nitrogen rich stream is withdrawn from the pipe 80A, and then enters the tank 76B of the second adsorber 70B after expansion in the downstream valve 88B.

The first recirculation valve 92A is closed by the control unit 74. The second recirculation valve 92B is opened by the control unit 74.

The oxygen present on the adsorbent material 77 of the second adsorber 70B and desorbed form the oxygen-rich stream. This stream passes successively through the second downstream valve 92B, the second line of stitching 90B and the return line 56. The oxygen-rich stream thus formed is then reintroduced into the interior volume 24. When the adsorbent material in the first vessel 76A is saturated, the control unit 74 switches the valve 72 in its second configuration for directing the flow of ambient gas under pressure to the second adsorber 70B.

The unit 74 thus opens before the second valve 82B and 82A closes the first valve upstream. As shown in Figure 4, then the compressed ambient gas passes into the adsorbent material 77 of the second tank 76B and the oxygen present in the gas is adsorbed. The nitrogen-rich stream formed at the outlet of the second adsorber 70B is then conveyed through the second conduit downstream 84B and then through the discharge pipe 86.

Part of this stream is removed to regenerate the first adsorber 70A through the first conduit downstream 86A and the downstream valve 88A. The oxygen present in the adsorbent 77 of the first tank 76A material forms an oxygen-rich stream which flows successively through the first tapping 90A and 92A the first valve held open by the control unit 74.

In the first configuration, as in the second configuration, a nitrogen rich stream is thus formed in the generator 52 to be discharged through the discharge pipe 86. Similarly, an oxygen-rich discharge stream is formed simultaneously in the generator 52 to be discharged into the recycling pipe 56 and being reintroduced into the interior volume 24.

The generator 52 then switches periodically between the first configuration and the second configuration.

Next, the nitrogen-rich stream present in the discharge pipe 86 passes into the downstream compressor 100 to be compressed to a pressure greater than the immersion pressure.

Depending on the choice of the flight crew, the exhaust valve 1 10 is either open or closed. When opened, the nitrogen rich stream is ejected outside the apparatus underwater due to its pressure greater than the immersion pressure. When the valve 1 10 is closed, closing the discharge pipe 102, the nitrogen rich stream is then directed towards the storing device 1 14 to be stored at high pressure, for subsequent purging.

When the pressure in the interior volume 24 decreases beyond a given value, for example greater than or equal to 100 mbar, or at given time intervals, for example of the order of 24 hours, the underwater vehicle 10 goes back to the vicinity of the surface for placing at least the snorkel tube 26 in a gas volume above the water surface. The pressure in the interior volume 24 is raised to atmospheric pressure through the delivery conduit of outer gas formed here by the snorkel tube 26.

Oxygen-rich gas outside is injected into the internal volume 24, which allows to enrich the ambient gas in oxygen.

This balancing is done very quickly, for example in a period less than 10 seconds, including the order of seconds, to keep the discretion of the underwater vehicle. The nitrogen purge may be advantageously carried when balancing.

In a variant, shown in dashed lines in Figure 2, the purge assembly

54 includes a purge line 102A to be connected to an output 122 of purge 122 immersed. In this case, the submerged outlet 122 may be provided with a continuous purge device in a body of water.

In this variant, the pressure supplied by the downstream compressor 100 can be reduced to be substantially equal to the pressure generator 52 over a few tens of bars.

Alternatively, the submerged outlet 122 is configured to allow rapid purging in the body of water.

Alternatively, at least a portion of the nitrogen recovered at the outlet of the downstream compressor 52 or generator 100 is forwarded to a local present in the volume 24, for the inerting of the room or to a utility consuming nitrogen.

Thanks to the invention which has just been described, it is possible to have a system 42 for treatment of ambient gas in the interior volume 24 of an underwater vehicle 10 which can be regenerated to infinity, allowing a range of the underwater vehicle 10 supplies potential vis-à-vis like candles or an oxygen storage.

The processing system 42 has a very low power consumption with respect to a present oxygen plant, for example on a submarine craft nuclear powered. Thus, power can be limited to a few kilowatts, against tens of kilowatts when oxygen is present factory.

In addition, the inner assembly 22 according to the invention is used in a very safe way, since no pyrotechnic risk candles, to an oxygen storage, or to the presence of hydrogen is present.

The processing system 42 is purged very quickly, minimizing indiscreet the underwater vehicle 10. In particular, the system 42 is much more discreet than a ventilation during charging in the using the snorkel tube 26. further, the air exchange can be performed during routine operations of access to the surface of the underwater vehicle 10, for example at radio sessions.

Alternatively, the nitrogen generator is a nitrogen membrane generator. The partial pressures on both sides of the membrane are different to allow selective transfer of part of the gases contained in the gas stream injected into the generator through the membrane. Such a generator and generates a rich stream treated in nitrogen and an oxygen-rich discharge stream.

Claims

1. - inner assembly (22) of the underwater vehicle (10), of the type comprising:
- an enclosure (40) defining an interior volume (24) containing an ambient gas;
- a system (42) for processing the ambient gas, the system (42) for processing comprising:
o an upstream inlet (68) for sampling ambient gas in the chamber (40);
o a device (51) for processing the ambient gas;
o a set (50) for conveying the ambient gas from the upstream inlet (68) to the processing device (51);
characterized in that the processing device (51) comprises at least one nitrogen generator (52) able to generate a rich stream treated in nitrogen and a discharge stream rich in oxygen from the ambient gas taken, the processing system (42) having a drain assembly (54) connected to the nitrogen generator (52) for discharging nitrogen-rich stream to the outside of the underwater vehicle (10).
2. - inner assembly (22) according to claim 1, characterized in that the entire conveyor (50) includes an upstream compressor (62).
3. - inner assembly (22) according to one of claims 1 or 2, characterized in that the nitrogen generator (52) comprises a first adsorber (70A) and a second adsorber (70B) connected in parallel with the first adsorber (70A), the nitrogen generator (52) having a control unit (74) adapted to selectively pressurize the first adsorber (70A) and the second adsorber (70B) so that in a first configuration, the first adsorber (70A ) to produce the nitrogen-rich stream treated, and the second adsorber (70B) produces the oxygen-rich discharge stream, and in a second configuration, the first adsorber (70A) generates the discharge stream rich in oxygen and the second adsorber (70B) produces the nitrogen-rich stream treated.
4. - inner assembly (22) according to claim 3, characterized in that the first adsorber (70A) and the second adsorber (70B) comprises an adsorption material (77) capable of selectively adsorbing oxygen to a first pressure high, the adsorption material (77) being and adapted to release oxygen adsorbed to a second low pressure lower than the first high pressure.
5. - inner assembly (22) according to claim 3, characterized in that the first adsorber (70A) and the second adsorber (70B) containing a clean adsorbent material selectively adsorbing nitrogen at a high first pressure, adsorption material being capable of releasing nitrogen at a second low pressure lower than the first high pressure.
6.- inner assembly (22) according to any one of claims 1 or 2, characterized in that the nitrogen generator (52) is a membrane generator.
7.- inner assembly (22) according to any one of the preceding claims, characterized in that the purge assembly (54) comprises a downstream compressor (100) connected to the nitrogen generator (52), to compress the current Treaty rich in nitrogen, the purge assembly (54) comprising means (1 14) for storing the compressed current Treaty.
8.- inner assembly (22) according to any one of the preceding claims, characterized in that the purge assembly (54) comprises a purge conduit (102) adapted to open on the outside of the machine sub marine (10), the purge conduit (102) being equipped with at least one bleed valve (1 10).
9. - inner assembly (22) according to claim 8, characterized in that drain conduit (102) is disposed at least partially above the enclosure (40) to open into a gas volume located above the enclosure (40) when the underwater vehicle (10) is at least partially immersed.
10. - inner assembly (22) according to claim 8, characterized in that drain conduit (102) opens out facing the enclosure (40) or the enclosure (40) to open into a volume of water .
January 1. - Gear submarine (10), characterized in that it comprises an inner assembly (22) according to any preceding claim.
12. - A method of conditioning the ambient gas present in the interior (24) of an inner assembly (22) according to any one of the preceding claims, of the type comprising the steps of:
- progressive evacuation of the ambient gas from the interior (24), the evacuation step of removal of an ambient gas stream through the upstream inlet (68), conveying the gas stream to ambient nitrogen generator (52) by the set of conveying (50) the formation of a nitrogen-rich stream treated, and the formation of a discharge stream rich in oxygen in the nitrogen generator (52), the pressure in the interior volume (24) decreases progressively;
- balancing the pressure in the interior volume by injecting an outer oxygen-rich stream into the interior volume (24).
13. - Method according to claim 12, characterized in that the nitrogen generator (52) comprises a first adsorber (70A) and a second adsorber (70B) mounted in parallel to the first adsorber (70A), the generator nitrogen (52) having a control unit (74) adapted to selectively pressurize the first adsorber (70A) and the second adsorber (70B), the evacuation step having a first stage for producing the nitrogen-rich stream treated by the first adsorber (70A) and oxygen-rich discharge stream from the second adsorber (70B), then a second phase of production of current nitrogen-rich processed by the second adsorber (70B), and oxygen-rich discharge stream by the first adsorber (70A).
14- A method according to any one of claims 12 or 13, characterized in that it comprises a step of purging the nitrogen rich stream produced by the generator (52) for processing, the purge step being performed when 'balancing step, the nitrogen-rich stream produced by the nitrogen generator (52) being preferably stored in a storage means (1 14) of the purge assembly (54) during the evacuation step .
15.- Method according to any one of claims 12 or 13, characterized in that it comprises a step of purging the nitrogen rich stream produced by the entire nitrogen generation (52), the purge step being formed in a body of water when the underwater vehicle is immersed.
PCT/EP2012/058801 2011-05-12 2012-05-11 Underwater vehicle internal assembly fitted with a system for treating ambient gas and associated treatment method WO2012152930A1 (en)

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FR1154121A FR2975075B1 (en) 2011-05-12 2011-05-12 gear set inside submarine provided with an ambient gas processing system and processing method combines
FR1154121 2011-05-12

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Application Number Priority Date Filing Date Title
EP12719768.9A EP2707280B1 (en) 2011-05-12 2012-05-11 Underwater vehicle internal assembly fitted with a system for treating ambient gas and associated treatment method

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NL255368A (en) * 1959-09-25

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US3740928A (en) * 1971-05-25 1973-06-26 Sulzer Ag Apparatus for adsorbing carbon dioxide from air in a storage system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3001831A4 (en) * 2013-04-23 2016-10-05 Enverid Systems Inc Regenerable sorbent co2 scrubber for submarine vessels
US9802148B2 (en) 2013-04-23 2017-10-31 Enverid Systems, Inc. Regenerable sorbent CO2 scrubber for submarine vessels

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EP2707280B1 (en) 2016-04-06
FR2975075A1 (en) 2012-11-16
FR2975075B1 (en) 2013-06-28
EP2707280A1 (en) 2014-03-19

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