DEVICE FOR PRODUCING AND PROCESSING A GAS FLOW THROUGH A VOLUME OF LIQUID, INSTALLATION AND METHOD IMPLEMENTING THIS DEVICE

Description

technical field

[0001] The present invention relates to the production and treatment of an airflow through a volume of liquid. Its applications include, but are not limited to, heat recovery from a gas stream, particularly from hot air or industrial fumes; the production of a gas stream that is heated or cooled by passing through said volume of liquid; the production of a gas stream with controlled temperature and / or controlled absolute humidity; the humidification or dehumidification of a gas stream; the purification or filtration of a gas stream; the heating or air conditioning of industrial, commercial, or residential premises or buildings; and the control of humidity in industrial, commercial, or residential premises or buildings. The produced gas stream can also be used to cool, heat, humidify, or dehumidify any type of object or surface. Previous art

[0002] The use of a liquid, such as water, to treat, and in particular to heat or cool, a gas stream through heat exchange between the liquid and the gas stream, with direct contact between the two, is a long-established technique that has the advantage of being environmentally friendly, as it avoids the use of heat transfer fluids such as refrigerants. Heating or cooling the gas stream, and especially an air stream, can, for example, aim to produce a gas stream with a controlled temperature and / or a gas stream with a controlled absolute humidity.

[0003] One known solution for implementing this technique involves passing the gas stream through a curtain of fine droplets of the liquid, or through a gas-permeable exchange surface containing the liquid, such as a water-soaked textile, or circulating the gas stream in contact with moistened plates. The main drawback of this type of solution lies in the very low energy efficiency of the heat exchange between the liquid and the gas stream, and in the low airflow rates that can be achieved.

[0004] A second known solution involves passing the gas flow, and in particular the air flow, directly through a volume of liquid contained in a chamber, by injecting the gas flow into the liquid volume below its surface. This type of solution is described, for example, in US patent 2,896,927, in international patent application WO 2006 / 138287, and in US patent 4,697,735 ( figure 3), and in German patent application DE 101 53 452. This second technical solution has the advantage of achieving a higher energy efficiency for heat exchange between the liquid and the gas stream than the first technical solution. However, the solutions described in these publications do not allow for operation with high gas flow rates, nor do they allow for the rapid processing of large gas volumes, and the energy efficiency of heat exchange between the liquid and the gas stream remains low. More specifically, the solutions described in these publications are not suitable, for example, for efficiently and rapidly cooling high-temperature gas streams, such as industrial flue gases, or for efficiently and rapidly recovering heat from a gas stream.

[0005] US patent 5,908,491 also proposed a device for cleaning air by passing it through a volume of water to filter out airborne dust. This device comprises a closed chamber containing the water, which is depressurized to draw in outside air and create an airflow through the water inside. This solution is not suitable for high airflow rates. Furthermore, it is not used, and indeed is not suitable, for efficiently transferring heat between the airflow and the water at high airflow rates. Objective of the invention

[0006] One objective of the invention is to propose a new technical solution which makes it possible to improve the production and treatment of a gaseous flow through a volume of liquid contained in a chamber, and in particular which makes it possible to efficiently treat a gaseous flow with large flow rates. Summary of the invention

[0007] The invention thus has as its first object a device for the production and processing of a gaseous flow defined in claim 1.

[0008] The invention also relates to an installation for recovering calories from an incoming gas stream, said installation comprising the device according to any one of claims 1 to 9, in which the temperature of the liquid is lower than the temperature of the gas stream entering the enclosure and an energy recovery system for recovering at least part of the calories captured from the liquid in the reservoir of said device.

[0009] The invention also relates to an installation comprising at least two upstream and downstream installations for recovering heat from a gaseous stream which conform to one of claims 10 and 11, and which are mounted in cascade, such that the gaseous stream exiting the device of the upstream installation is at least partly, and preferably entirely, used as the gaseous stream entering the device of the downstream installation.

[0010] The invention also relates to a method for heating and / or cooling and / or humidifying and / or dehumidifying a room, by means of at least one device according to one of claims 1 to 9, and which is arranged in such a way that the incoming gas flow which is introduced into the enclosure of the device is an air flow, and the outgoing air flow from the device is introduced into the room.

[0011] The invention also relates to a method for producing a gaseous flow, and in particular an air flow, from an incoming gaseous flow, and in particular an incoming air flow, in which an installation according to one of claims 10 to 12 is used, and at least part of the calories captured in the liquid reserve are used for heating.

[0012] The invention also relates to a method of recovering calories from the air of a room or of dehumidifying a room with heat recovery, by means of an installation according to one of claims 10 to 12, in which the incoming gas flow which is introduced into the enclosure of the device of the installation is an air flow coming at least in part from inside the room.

[0013] The invention also relates to a method for creating a buffer zone inside a room in which the humidity and / or dust content is controlled, characterized in that a device according to any one of claims 1 to 9 is used, which is arranged such that the gas flow entering the enclosure of the device is an air flow coming at least partly from outside the room, and in which the air flow exiting the enclosure of the device is introduced at least partly into the room.

[0014] The invention also relates to a method for filtering and / or depolluting a gas stream, and in particular an air stream, by means of at least one device according to one of claims 1 to 9, of an installation according to one of claims 10 to 12, such that an incoming gas stream containing particles and / or pollutants is introduced into the enclosure of the device and at least part of these particles and / or pollutants is captured in the liquid of the device's reservoir.

[0015] More specifically, the incoming gas stream contains industrial fumes, particularly high-temperature industrial fumes. More generally, the invention aims to provide a new technical solution for efficiently recovering heat from a gas stream while implementing high gas flow rates. Brief description of the figures

[0016] The features and advantages of the invention will become clearer upon reading the following detailed description of several particular embodiments of the invention, which particular embodiments are described by way of non-limiting and non-exhaustive examples of the invention, and with reference to the accompanying drawings in which: There figure 1 schematically represents a first embodiment of a device of the invention enabling the production and processing of a gaseous flow through a volume of liquid. figure 2 schematically represents a second embodiment of a device of the invention enabling the production and processing of a gaseous flow through a volume of liquid. figure 3schematically represents a third embodiment of a part of a device of the invention enabling the production and processing of a gaseous flow through a volume of liquid. figure 4 schematically represents a fourth embodiment of a part of a device of the invention enabling the production and processing of a gaseous flow through a volume of liquid. figure 5 schematically represents a first variant of an installation implementing the device of the figure 1 and allowing for the recovery of calories from a gaseous stream. figure 6 schematically represents a second variant of an installation implementing the device of the figure 1 and allowing for the recovery of calories from a gaseous stream. figure 7 schematically represents a third variant of an installation implementing the device of the figure 1and allowing for the recovery of calories from a gaseous stream. figure 8 schematically represents a fourth variant of an installation implementing two devices of the figure 1 cascading, and allowing for the recovery of calories from a gaseous stream. figure 9 schematically represents a fifth variant of an installation implementing the device of the figure 1 and allowing for the recovery of calories from a gaseous stream. Figure 10 schematically represents a variant of an installation implementing the device of the figure 1 , and allowing the creation of a buffer zone where humidity or dust content is controlled. Detailed description

[0017] With reference to the particular variant of the implementation of the figure 1, the device 1 for the production and processing of a gaseous flow comprises a chamber 10, a liquid reservoir 11 L open at the top, and for example a water reservoir, and means 12 for the production and injection of a gaseous flow F entering a volume V of liquid contained in the chamber 10.

[0018] The invention is not limited to the use of water as the liquid L, but extends to any other type of liquid. By way of non-limiting and non-exhaustive examples, it may be advantageous to use a liquid L whose freezing point at atmospheric pressure is below 0°C, such as water containing additives like salts, carbohydrates, or glycol. It may also be advantageous to use oil as the liquid L.

[0019] The enclosure 10 comprises an upper wall 10a and a side wall 10b delimiting an internal chamber 10c, and has at its lower end a large-section liquid inlet opening 10d. In another embodiment, this large-section opening 10d could be replaced by several smaller-section liquid inlets.

[0020] The lower part 10e of the enclosure 10 is immersed in the volume of liquid L contained in the reservoir 11, without touching the bottom 11a of the liquid reservoir 11.

[0021] The liquid inlet opening 10d allows the lower part 10e of the enclosure 10 to communicate with the liquid reservoir 11, such that the lower submerged part 10e of the enclosure contains a portion of this liquid L, in the form of a volume V of liquid.

[0022] The enclosure 10 also includes at least one gas flow discharge opening 10g, which is positioned above the surface S of the volume V of liquid contained in the enclosure 10, and which in the illustrated example is provided near the upper wall 10a of the enclosure 10.

[0023] The means 12 for producing and injecting a gaseous flow F comprise at least one injection conduit 120, the lower part of which 120a is immersed in the volume V of liquid contained in the lower immersed part 10e of the enclosure 10, and extends in the upper part inside the enclosure 10 outside of said volume V of liquid.

[0024] In this particular example, this injection conduit 120 consists of a straight vertical tube, which passes through the upper wall 10a of the enclosure 10, and which is open at both its upper and lower ends.

[0025] This injection conduit 120 thus includes in its lower submerged part 120a at least one evacuation opening 120c positioned below the surface S of said volume V of liquid, and above the level of the liquid inlet opening 10d of the lower submerged part 10e of the enclosure 10.

[0026] The immersion depth H1 of the injection conduit 120 in the liquid, i.e. the distance H1 between the opening 120c and the surface S of the volume V of liquid, is less than the immersion depth H2 of the enclosure in the reservoir 11 of liquid, i.e. the height H2 of the volume V of liquid in the enclosure 10.

[0027] The means 12 for producing and injecting a gaseous flow F further include aerodynamic means 121, which, in operation, allow the creation and introduction of an incoming gaseous flow F, from outside the enclosure 10, into the upper, non-immersed part 120b of the injection duct. In the particular variant of the figure 1 , these aerodynamic means 121 more particularly comprise a gas compressor 121a, the outlet of which is connected to the upper inlet opening 120d of the injection duct 120 by a pipe 121b, and the inlet of which is connected to an inlet pipe 121c communicating with the outside of the enclosure 10. This compressor 121a makes it possible to create by suction a gas flow F, and to introduce this gas flow F under pressure into the injection duct 120 through the upper inlet opening 120d of the injection duct 120.

[0028] The 121a compressor can be any known type of gas compressor capable of creating a gas flow (centrifugal fan, axial fan, pump, ...).

[0029] The invention allows working with a gas flow rate at the outlet of the compressor 121a which is significant, namely greater than 1000m³ / h, and more particularly in certain applications greater than 10000m³ / h.

[0030] When the compressor 121a is operating, the gas flow F created by the compressor 121a is introduced under pressure into the injection conduit 120 through the upper inlet opening 120d of this conduit, passes through the outlet opening 120c of the lower submerged part of the injection conduit 120, and is introduced into said volume V of liquid contained in the lower submerged part 10e of the enclosure 10, below the surface S of said volume V of liquid, without changing the external pressure above the liquid L of the reservoir 11 outside the enclosure 10. Thus, in the particular case illustrated, when the compressor 121a is operating, the external pressure above the liquid L of the reservoir 11 outside the enclosure 10 is not changed and remains equal to atmospheric pressure.

[0031] More specifically, the gas flow F is introduced into said volume of liquid V by being directed downwards.

[0032] The compressor 121a is selected so as to create a gas flow F with a pressure in the injection conduit 120, above the liquid, which is greater than the liquid column H1 in the immersed part 120a of the injection conduit 120, so that the gas can be evacuated into the volume V of liquid outside the injection conduit 120.

[0033] The gas introduced into the liquid volume V passes through the liquid volume V, rising towards the surface S of said liquid volume V, under the influence of the gas velocity and the buoyant force, and exits inside the chamber 10 and outside the injection conduit 120, forming an outgoing gas stream F', which has been treated by direct contact with said liquid volume V. This outgoing gas stream F' rises inside the chamber 10, outside the injection conduit 120, and is discharged from said chamber 10 through the discharge opening 10g of the chamber 10.

[0034] More specifically, the immersion depths H1 and H2 are dimensioned, in particular with respect to the gas pressure in the injection conduit 120 above the liquid, such that all the gas, which is introduced into the volume V of liquid contained in the lower submerged part 10e of the enclosure 10, rises in the volume of liquid V and exits in the enclosure 10 above the liquid and outside the injection conduit 120, without any part of this gas passing through the lower inlet opening 10d of the enclosure 10, into the volume of liquid located outside the enclosure 10. When the temperature of the volume of liquid V in the enclosure 10 is different from the temperature of the gas flow F before its introduction into the volume V of liquid, heat exchanges occur between the gas and the liquid by sensible heat and latent heat.

[0035] When the liquid temperature TLiquid of the liquid volume is lower than the initial temperature TInitial of the gas flow F before its introduction into the liquid volume, the gas flow F' is cooled. More specifically, the temperature of the outgoing gas flow F' is approximately equal to the liquid temperature TLiquid of the liquid volume. Consequently, the gas airflow F' exiting device 1 has been dehumidified relative to the incoming gas flows F, the absolute humidity (weight of water per volume of air) in the outgoing gas flow F' being lower than the absolute humidity of the incoming gas flow F.

[0036] Conversely, when the temperature of the liquid volume (TLiquid) is higher than the initial temperature (TInitial), the outgoing gas flow (F') is heated. This results in the gas flow (F') exiting device 1 being humidified relative to the incoming gas flow (F), with the absolute humidity (weight of water per volume of air) in the outgoing gas flow (F') being greater than the absolute humidity of the incoming gas flow (F).

[0037] The immersion depth H1 of the injection conduit 120 must be sufficient to ensure that the gas flow is treated by passing through the liquid volume V, and more specifically, that the heat transfer between the liquid and the gas injected into the liquid volume V is efficient and sufficient, allowing the gas flow F', cooled or heated by the liquid, to be at a temperature close to, and preferably substantially identical to, that of the liquid. Conversely, this immersion depth H1 must not be too great to avoid oversizing the compressor 121a. According to the invention, the depth H1 is therefore between 20 mm and 200 mm, and is preferably between 30 mm and 50 mm.

[0038] Similarly, for better efficiency, the height H2 of the liquid volume V should preferably not be too great, and will preferably be less than 500 mm, and more particularly between 40 mm and 500 mm. However, the invention is not limited to these specific values.

[0039] In another application, the device 1 of the invention can be used to filter or purify the incoming gas stream F by passing it through a volume of liquid V. In this application, the temperature of the liquid volume may be higher or lower than the temperature of the incoming gas stream F, or substantially equal to the temperature of the incoming gas stream F. When the temperature of the liquid volume is substantially equal to the temperature of the incoming gas stream F, a filtered or purified outgoing gas stream F' is produced at the outlet of the device 1, which has not been heated or cooled, but is substantially at the same temperature as the incoming gas stream F.

[0040] We have represented on the figure 2 , another embodiment of a device 1' of the invention in which the injection conduit 120 is delimited between a vertical wall P internal to the enclosure 10 and by a part of the lateral wall 10c of the enclosure 10.

[0041] We have represented on the figure 3 Another embodiment of a device 1" of the invention is shown in this figure, where only the enclosure 10 and the compressor 121a are represented, the liquid reservoir 11 not being shown. In this embodiment, the side wall 10c of the enclosure 10 is tubular in shape, but could, within the scope of the invention, have a completely different geometry.

[0042] In this variant of the figure 3The enclosure 10 has in its upper part 10f, which is not intended to be immersed in a liquid, several plates 14, 14', 14" which function as baffles. These plates 14, 14', 14" are fixed inside the enclosure 10, one above the other, with a space between plates 14, so as to form several superimposed chambers E1, E2, E3 and E4. Each plate 14, 14', 14" is in sealed contact around its entire periphery with the side wall 10c of the enclosure 10. In operation, when the lower part of the enclosure is immersed in a liquid reservoir, the first chamber E1 is delimited by the surface area of ​​the volume of liquid V contained inside the enclosure and the lower plate 14. The second chamber E2 is delimited by the lower plate 14 and the intermediate plate 14'. The third chamber E3 is delimited by the intermediate plate 14' and the upper plate 14".The fourth chamber E4 is delimited by the top plate 14" and the top wall 10a of the enclosure 10.

[0043] The number of plates 14, 14', 14" and of chambers E1, E2, E3 and E4 are not limiting of the invention, the device 1 being able to comprise a single plate 14 delimiting two chambers or more than three plates delimiting more than four chambers.

[0044] Each plate 14, 14, 14" has a through opening 140 having substantially the same cross-section as the injection conduit 120. These through openings 140 are aligned vertically, and the injection conduit 120 is passed through these openings 140, the conduit 120 being in sealed contact over its entire outer periphery with each plate 14, 14', 14" at the level of each opening 140 of passage of the tube.

[0045] Each plate 14, 14', 14" also includes at least one through opening 141 allowing communication between two neighboring chambers, and thus allowing the passage of a gaseous flow F' exiting the volume of liquid V from one chamber to the other from the lower chamber E1 to the evacuation opening 101.

[0046] These openings 141 are vertically offset from each other and are not aligned with the air outlet opening 101 of the enclosure 10, so as to cause said airflow F' to undergo several changes of direction.

[0047] In operation, with the lower part 10e of the enclosure 10 immersed in a reservoir 11 of liquid, the airflow F' exiting the volume of liquid V rises inside the enclosure 10 by circulating through the baffles 14,14',14", and undergoing several successive changes of direction, then is evacuated outside the enclosure 10 through the evacuation opening 10g.

[0048] We have represented on the figure 4 , another variant that differs from that of the figure 3 in that the air compressor 121a is connected to the air exhaust opening 10g of the enclosure 10, and creates the incoming gas flow F by suction through the inlet opening 120d of the injection duct 120, and no longer by blowing.

[0049] In both variants of figures 3 And 4When significant turbulence occurs within the liquid volume V, potentially causing liquid droplets to be projected by the outgoing gas flow F', the baffles 14, 14', 14" obstruct the path of these droplets. The successive changes in air direction imposed by the baffles prevent liquid from being projected out of the discharge opening 10g along with the outgoing airflow F'. Thanks to the baffles 14, 14', 14', no liquid droplets are projected outside the enclosure. This advantageously results in very high airflow rates F and F' and / or a small enclosure volume, thus reducing the device's overall size while preventing liquid droplets from being projected outside the device's enclosure.

[0050] We have represented on the figure 5, an installation for recovering heat from a gaseous stream F, which implements device 1 of the figure 1 Of course, it is also possible to use the devices of the following to carry out this installation. figures 2 to 4 .

[0051] In this installation of the figure 5 The liquid reservoir 11, containing liquid L, is, for example, a water reservoir and is optionally equipped with a water treatment unit 110. This unit allows, for example, maintaining the water's pH at a controlled value, such as neutral pH, and / or filtering the water L to remove impurities or pollutants. The installation is also equipped with a heat pump system 2, which recovers some of the heat from the liquid L in reservoir 11.

[0052] This heat recovery system 2 more particularly includes a heat transfer fluid circulating in a closed circuit 20. Said closed circuit 20 includes an evaporator 21 immersed in the liquid L of the reservoir 11, a condenser 22 positioned outside the liquid reservoir 11, a compressor 23 interposed between the outlet of the evaporator 21 and the inlet of the condenser 22, an expansion valve 24 interposed between the outlet of the condenser 22 and the inlet of the evaporator 21.

[0053] During operation, a hot and / or humid gas flow F is created by the compressor 121a by suction through the inlet pipe 120c. This gas flow F is created by suction, for example, from the surrounding air inside or outside a building, or in such a way as to capture hot and / or humid fumes produced by a chimney or appliance, and in particular by an industrial chimney.

[0054] The liquid temperature T of the liquid L, for example water, in reservoir 11 is lower than the initial temperature of the gas stream F. As it passes through the volume of liquid V contained in enclosure 10 of the device, the gas is cooled and dehumidified. The gas F' exiting device 1 is at a lower temperature than the incoming gas stream F, and the absolute humidity (weight of water per volume of air) in the outgoing gas stream F' is lower than the absolute humidity of the incoming gas stream F. This outgoing gas stream F' is, for example, redirected to the outside of a building or to an area (indoors or outdoors) where cooling and lower humidity are required.

[0055] As the gas passes through the volume of liquid V, it releases heat to the liquid V, due to both sensible heat resulting from the temperature difference between gas F and liquid 11, and latent heat from the water vapor in gas F that condenses in liquid 11. The greater the temperature difference between liquid 11 and the incoming gas flow F, the more heat is absorbed from liquid 11. This heat is absorbed by and distributed throughout the larger liquid reservoir 11. The resulting temperature increase in the liquid L of reservoir 11 heats the heat transfer fluid circulating as vapor in evaporator 21.All or part of the calories supplied to the liquid L of the reservoir 11 by the incoming gas flow F are therefore recovered by heating the heat transfer fluid in the evaporator 21, which helps to lower the temperature of the liquid reservoir 11, and are transferred to the condenser 22 at which point the heat transfer fluid condenses into a liquid state and releases heat.

[0056] When the gas stream F contains pollutants soluble in the liquid of the reservoir 11 or particles (for example gas stream F formed from polluting industrial fumes), the reservoir 11 of liquid L advantageously allows to capture at least part of these pollutants or particles, and to produce a cleaner outgoing stream F'.

[0057] The installation of the figure 5can more particularly be used to treat high temperature industrial fumes (for example at 1000°C) by cooling them below 100°C, and by depolluting them, and by recovering a significant part of the calories from these industrial fumes via the liquid reserve 11 and the energy recovery system 2.

[0058] We have represented on the figure 6 an energy recovery system, which differs from the figure 5, in that the energy recovery system 2' directly uses the liquid L from the reservoir 11 as a heat transfer fluid, and allows to supply in a closed loop an energy storage tank 25 (for example an additional liquid reserve) or a device 25 (for example heat pump or equivalent) allowing to recover by thermal exchange the calories stored in the liquid 11. The energy recovery system 2' thus comprises a closed circuit in which a part of the liquid L from the reservoir circulates as a heat transfer fluid.

[0059] We have represented on the figure 7 an energy recovery system, which differs from the figure 5by implementing in the energy recovery system 2" an intermediate heat exchanger 26 in which a heat transfer fluid circulates in a closed loop. A part 26a of the intermediate heat exchanger 26 is immersed in the liquid 11, and a part 26b is located outside the liquid L and allows heat transfer with the heat transfer fluid in the evaporator 21 outside the reservoir 11 of liquid L. Examples of non-limiting applications of the invention of the installations shown in Figures 5 to 7 Example 1 Recycling of stale air from inside a dwelling or building to the outside with energy recovery

[0060] The air inside the dwelling or room contains approximately 60% relative humidity and is at a temperature of approximately 20°C. Reservoir 11 contains water at a temperature of approximately 3°C. The energy recovered from the water per m³ of air is: Sensible heat: approximately 20 kJ / m³ Latent heat: approximately 10 kJ / m³ Example 2:Energy recovery in air containing approximately 80% relative humidity and at a temperature of approximately 50°C.

[0061] Reservoir 11 contains water at a temperature of approximately 6°C. The energy recovered from the water per m³ of air is: Sensible heat: approximately 54 kJ / m³ Latent heat: approximately 152 kJ / m³

[0062] We have represented on the figure 8 a multi-stage installation comprising two installations 11 and 12 which are similar to the installation of the figure 5 and which are mounted in cascade, the gas flow F' exiting the upstream installation 11 being used as the gas flow entering F of the downstream installation 12.

[0063] This multi-story installation of the figure 8 is particularly suitable for cooling and recovering energy in several successive stages in high-temperature gas streams, such as industrial fumes.

[0064] We have represented on the figure 9 , an energy recovery and, where applicable, air dehumidification installation inside a room or dwelling 3, which operates in a closed circuit, the outgoing airflow F' cooled, and where applicable dehumidified, being reinjected into said room 3. In this installation, the air which is reintroduced into the room is preheated by heat exchange with the condenser 22 of the energy recovery system 2. Another part of the energy transferred to the condenser 22 can be recovered elsewhere (arrow A).

[0065] For example, and without limitation, location 3 could be an indoor swimming pool. Location 3 could also be any type of space containing people or animals, with the installation thus enabling the recovery of energy from human or animal activities.

[0066] We have represented on the Figure 10An energy recovery system is used to create an internal buffer zone 4, in which the humidity or dust concentration in the air is controlled. In this system, the outgoing airflow F', which has been dehumidified and / or filtered by passing through a water volume V, is heated by a heat treatment unit 5 before being introduced into the internal buffer zone 4. The energy recovery system 2 is optional in this system.

[0067] In the embodiments illustrated in the accompanying figures, the discharge opening 120c of the injection conduit 120 is positioned above the level of the liquid inlet opening 10d of the lower submerged portion 10e of the enclosure. In another embodiment, the discharge opening 120c of the injection conduit 120 can be positioned at or below the level of the liquid inlet opening 10d of the lower submerged portion 10e of the enclosure 10.

[0068] In the embodiments illustrated in the accompanying figures, the liquid level L in the chamber 10 is the same whether it is in the injection conduit 120 or outside the injection conduit 120. In another embodiment, a hydraulic pump can be used to pump liquid from the reservoir 11 and introduce this pumped liquid into the chamber 10, outside the injection conduit 120, such that the immersion depth H1 of the injection conduit 120 (i.e., the height H1 of liquid in the injection conduit 120) is constantly less than the height H2 of liquid in the chamber 10 and outside the injection conduit 120. In this case, the discharge opening 120c of the injection conduit 120 can be positioned at the same level as, or below, the level of the liquid inlet opening 10d of the lower submerged portion 10e. of enclosure 10.

[0069] In the embodiments illustrated in the attached figures, the reservoir 11 is formed by a container open at the top. In another embodiment, the container or equivalent forming the reservoir 11 may be closed.

Claims

1. A device for producing and treating a gas stream (F), said device including an enclosure (10), of which the lower part (10e) is submerged in a liquid (L) supply (11) and includes at least one liquid intake opening (10d), which makes it possible to place the lower part of the enclosure in communication with the liquid supply, such that the submerged lower part (10e) of the enclosure contains a volume (V) of this liquid, and on the one hand which includes at least one opening (10g) for discharging a gas stream, positioned above the surface (S) of the volume (V) of liquid contained in the enclosure, the device further including means for producing and injecting a gas stream (F) including at least one injection conduit (120), of which a lower part (120a) is submerged in the volume (V) of liquid contained in the submerged lower part of the enclosure, and extends in the upper part inside the enclosure (10) outside said volume (V) of liquid, said injection conduit (120) including, in its submerged lower part, at least one discharge opening (120c) positioned below the surface (S) of said volume (V) of liquid, said means for producing and injecting a gas stream (F) make it possible, during operation, to create and introduce an incoming gas stream (F), coming from outside the enclosure (10), in the non-submerged part (120b) of the injection conduit (120), such that said incoming gas stream (F) passes through the discharge opening (120c) of the submerged lower part of the injection conduit (120), and is introduced into said volume (V) of liquid contained in the submerged lower part of the enclosure, below the surface (S) of said volume (V) of liquid, and such that an outgoing gas stream (F'), treated by direct contact with said volume (V) of liquid, rises inside the enclosure (10) outside the injection conduit (120) and is discharged outside said enclosure (10), passing through the discharge opening (10g) of the enclosure characterized in that the submersion depth (H1) of the injection conduit is comprised between 20 mm and 200 mm and in that said means for producing and injecting a gas stream (F) make it possible, during operation, to create and introduce said incoming gas stream (F), with a flow rate of at least 1000m3 / h and without modifying the outside pressure above the liquid (L) of the supply (11) outside the enclosure (10).

2. The device according to claim 1, wherein the means for producing and injecting a gas stream (F) include a compressor (121a) that is connected to the non-submerged part (120b) of the injection conduit (120) or wherein said means for producing and injecting a gas stream (F) include a compressor (121a) connected to the discharge opening (10g) of the enclosure (10) .

3. The device according to any one of the preceding claims, wherein the supply (11) of liquid is open at the upper part, and more particularly includes an open tub at the upper part and / or wherein the supply (11) of liquid, outside the enclosure (10), is at atmospheric pressure, including during the operation of the means for producing and injecting the incoming gas stream (F).

4. The device according to any one of the preceding claims, wherein the discharge opening (120c) of the injection conduit (120) is positioned at the same level as the liquid intake opening (10d) of the submerged lower part (10e) of the enclosure (10) or above the level of the liquid intake opening (10d) of the submerged lower part (10e) of the enclosure (10) and / or wherein the injection conduit (120) makes it possible to introduce the gas stream (F) into said volume (V) of liquid by steering it downward.

5. The device according to any one of the preceding claims, wherein the enclosure (10) includes one or several baffles (14; 14'; 14"), which make it possible to circulate the gas stream (F') leaving the volume (V) of liquid up to the discharge opening (10g), by having it undergo one or several changes of direction, so as to prevent liquid from being sprayed through the discharge opening (10g).

6. The device according to any one of the preceding claims, wherein the submersion depth (H1) of the injection conduit is smaller than the height (H2) of the volume (V) of liquid in the enclosure (10) outside the injection conduit (120) and / or wherein the submersion depth (H1) of the injection conduit is comprised between 30 mm and 50 mm and / or wherein the height (H2) of the volume (V) of liquid in the enclosure (10) outside the injection conduit (120) is smaller than 500 mm, and preferably greater than 40 mm.

7. The device according to any one of the preceding claims, wherein the means for producing and injecting a gas stream make it possible to create and introduce said incoming gas stream (F) with a flow rate of at least 10,000 m3 / h, and / or wherein the ratio between the flow rate of the incoming gas stream (F) in the enclosure (10) and the volume (V) of liquid contained in the enclosure (10) is greater than 104h-1.

8. The device according to any one of the preceding claims, wherein the temperature of the liquid (Tliquid) is lower than the temperature (Tinitial) of the gas stream (F) entering the enclosure (10) or wherein the temperature (Tliquid) of the liquid (L) is higher than the temperature (Tinitial) of the incoming gas stream (F) entering the enclosure (10).

9. The device according to any one of the preceding claims, wherein the liquid (L) is water and / or wherein the liquid (L) is a liquid whose solidification temperature at atmospheric pressure is lower than 0°C.

10. A facility making it possible to recover calories in an incoming gas stream (F), said facility including the device set out in any one of the preceding claims wherein the temperature of the liquid (Tliquid) is lower than the temperature (Tinitial) of the gas stream (F) entering the enclosure (10) and an energy recovery system (2; 2'; 2") making it possible to recover at least part of the calories captured in the liquid (L) from the supply (11) of said device.

11. The facility according to claim 10, wherein the energy recovery system (2; 2") includes a closed circuit (20) in which a heat transfer fluid circulates, and which comprises an evaporator (21 or 26a) allowing a heat exchange with the liquid (L) in the supply (11) and preferably wherein the evaporator (21 or 26a) is submerged in the liquid (L) of the supply (11) and / or wherein the energy recovery system (2') includes a closed circuit in which part of the liquid (L) from the supply serving as a heat transfer fluid circulates.

12. A facility including at least two upstream (11) and downstream (I2) facilities for recovering calories in a gas stream (F) that are according to any one of claims 10 and 11, and which are mounted in a cascade, such that the gas stream (F') leaving the device of the upstream facility (11) is at least partially, and preferably completely, used as incoming gas stream (F) of the device of the downstream facility (I2).

13. A method for heating and / or cooling and / or humidifying and / or dehumidifying a site, using at least one device according to in any one of claims 1 to 9, and which is arranged such that the incoming gas stream (F) that is introduced into the enclosure (10) of the device is an air stream, and the air stream (F') leaving the device is introduced inside the site and preferably wherein the incoming air stream (F) that is introduced into the enclosure (10) comes at least partially from outside the site and / or preferably wherein the incoming air stream (F) that is introduced in the enclosure (10) comes at least partially from inside the site.

14. A method for producing a gas stream (F'), and in particular an air stream, from an incoming gas stream (F), and in particular an incoming air stream, in which a facility according to any one of claims 10 to 12 is used, and for heating, at least part of the calories captured in the liquid supply (11) is used.

15. A method for recovering calories in the air of a site or dehumidifying a site with calorie recovery, using a facility according to any one of claims 10 to 12, in which the incoming gas stream (F) that is introduced into the enclosure (10) of the device of the facility is an air stream coming at least partially from the inside of the site.

16. A method for creating a buffer zone inside the site in which the humidity and / or dust content is controlled, characterized in that a device according to any one of claims 1 to 9 is used that is arranged such that the incoming gas stream (F') in the enclosure (10) of the device is an air stream coming at least partially from outside the site, and wherein the air stream (F') leaving the enclosure (10) of the device is introduced at least partially into the site.

17. A method for filtering and / or cleaning up a gas stream, and in particular an air stream, using at least one device according to any one of claims 1 to 9, or a facility according to any one of claims 10 to 12, such that an incoming gas stream (F) containing particles and / or pollutants is introduced into the enclosure (10) of the device and at least part of these particles and / or pollutants are captured in the liquid (L) of the supply (11) of the device.

18. The method according to claim 17, wherein the incoming gas flow (F) contains industrial fumes, and in particular high-temperature industrial fumes.