DEVICE FOR THE PRODUCTION AND PROCESSING OF GAS FLOW THROUGH AN AUTOMATICALLY REGULATED VOLUME OF LIQUID

Abstract

The device for producing and processing a gaseous flow (f) comprises an exchange chamber (2) having at least one first evacuation opening (2b) for a gaseous flow, means (3; 4) for supplying the chamber with a liquid (l), means (3; 5) for evacuating the liquid (l) contained in the exchange chamber (2) and aerodynamic means (6), which are capable in operation of creating, by suction or blowing, an incoming gaseous flow (f) from outside the exchange chamber (2), such that this incoming gaseous flow (f) is introduced into the volume of liquid (v) contained in the exchange chamber (2), and an outgoing gaseous flow (f'), treated by direct contact with said volume of liquid, rises inside the exchange chamber and is evacuated outside said exchange chamber (2) by passing through the evacuation opening (2b).The device includes first means (7) for measuring a first operating parameter (xout) measured in the outgoing gas stream (f') or first means for measuring a first operating parameter (xout) measuring the concentration (clout) of a compound in the liquid contained in or originating from the exchange chamber (2) or measuring the pH (phout) of the liquid contained in or originating from the exchange chamber (2). The device includes electronic control means (9) capable of automatically controlling the means (3; 4) for supplying the exchange chamber and the means (3; 5) for draining the exchange chamber so as to automatically regulate the height (h) of liquid in the exchange chamber as a function of at least this first operating parameter (xout).

Description

technical field

[0001] The present invention relates to the production and treatment of gas streams through a volume of liquid with the implementation of automatic regulation of the liquid volume. It finds application in various fields such as, for example, and not limited to, heat recovery from a gas stream, and in particular from a hot air stream or from 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 whose temperature is controlled and / or whose absolute humidity is controlled, the humidification or dehumidification of a gas stream, the purification or filtration of a gas stream, the treatment of a gas stream by chemical reaction with a liquid, the heating or air conditioning of a room or industrial, commercial, or domestic buildings, and the control of humidity in a room or industrial, commercial, or domestic buildings. 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 heat exchange chamber, by injecting the air flow into the liquid volume below its surface. This type of solution is described, for example, in international patent application WO 2006 / 138287 and in US patent US 4,697,735 (Figure 3). This type of solution is also described in international patent applications WO 2015 / 086979 and WO 2016 / 071648. This second technical solution has the advantage of achieving a higher energy efficiency for heat exchange between the liquid and the gas flow than the first technical solution.

[0005] In this second technical solution, the heat exchange between the gas stream and the liquid volume depends on the height of the liquid through which the gas stream passes. The greater this height of liquid, the greater the heat exchange. For example, when the liquid is used to heat or cool a gas stream, the greater the height of liquid in the exchange chamber, the greater the amount of heat exchanged per unit of time between the gas stream and the liquid. When the liquid is used to capture a compound from the gas stream, the greater the height of liquid in the exchange chamber, the greater the amount of that compound captured per unit of time in the liquid.

[0006] In some applications, the pressure in the gas stream at the inlet of the heat exchanger and / or the pressure in the gas stream at the outlet of the heat exchanger can vary uncontrollably, automatically causing a change in the liquid level within the heat exchanger to compensate for this pressure variation. This change in liquid level alters the operating point of the device, as the heat exchange between the gas stream and the liquid volume in the heat exchanger is detrimentally and uncontrollably modified.

[0007] In some applications, even if the pressure in the gas flow at the inlet of the exchange chamber and the pressure of the gas flow at the outlet of the exchange chamber are constant over time, it may be useful to be able to vary the operating point of the device, and therefore to be able to vary the level of exchange between the gas flow and the volume of liquid, in order for example to make it optimal.

[0008] More generally, there is a need to automatically regulate the operating point of a device for the production and processing of a gas flow by passing it through a volume of liquid contained in an exchange chamber. Objective of the invention

[0009] One objective of the invention is to propose a new technical solution, which makes it possible to produce a treated gas flow by passing it through a liquid contained in an exchange chamber and to automatically regulate the operating point of the device. Summary of the invention

[0010] The invention thus relates to a device for the production and processing of a gaseous flow, which device comprises a heat exchange chamber having at least one first outlet for the discharge of a gaseous flow, means for supplying the chamber with a liquid such that the chamber can contain a volume of this liquid, with said first outlet of the heat exchange chamber positioned above the surface of the volume of liquid contained in the heat exchange chamber, means for evacuating the liquid contained in the heat exchange chamber, and aerodynamic means, which are capable, in operation, of creating, by suction or blowing, an incoming gaseous flow from outside the heat exchange chamber, such that this incoming gaseous flow is introduced into the volume of liquid contained in the heat exchange chamber, below the surface of said volume of liquid, and that an outgoing gaseous flow,The treated liquid, through direct contact with said volume, rises inside the exchange chamber and is discharged outside said exchange chamber by passing through the discharge opening of the exchange chamber.

[0011] Characteristically according to the invention, the device further comprises first means for measuring a first operating parameter (X out) measured in the outgoing gas stream or first means for measuring a first operating parameter (X out) measuring the concentration (CL out) of a compound in the liquid contained in or coming from the exchange chamber, or measuring the pH (pH out) of the liquid contained in or coming from the exchange chamber, and electronic control means capable of automatically controlling, in particular during operation of the device, the means for supplying the exchange chamber and the means for evacuating the exchange chamber so as to automatically regulate the height of the liquid (or in other words the liquid level) in the exchange chamber as a function at least of this first operating parameter (X out).

[0012] More specifically, but optionally according to the invention, the device of the invention may include the following additional and optional technical features, taken individually or in combination and defined in any one of claims 2 to 15.

[0013] The invention also relates to the use of at least one of the aforementioned devices to produce at least one gaseous stream which has been treated by passing through a volume of liquid contained in the exchange chamber of the device.

[0014] More particularly, the invention relates to the use of at least one of the aforementioned devices for filtering and / or depolluting and / or cooling and / or heating an incoming gas stream.

[0015] More particularly the invention relates to the use of at least one of the aforementioned devices for the treatment of an incoming gas stream from combustion or an incoming gas stream containing industrial fumes, and in particular high-temperature industrial fumes or a gas stream containing at least one of the compounds selected from the following list: NOx (Nitrogen oxide), VOC (Volatile organic compound), SOx (Sulfur oxide), PAH (Polycyclic Aromatic Hydrocarbon), CO, CO2, NH3, chloramine. 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 1is a schematic representation of a first device conforming to the invention; the figure 2 is a schematic representation of a second device according to the invention Detailed description

[0017] Several examples of devices for producing and processing a gas stream, according to the invention, will be described in detail below. These devices can be used in all applications where it is useful to process a gas stream by passing it through a volume of liquid.These devices can therefore be used in a wide variety of fields such as, for example, and in a non-exhaustive way, the recovery of calories in a gas stream, and in particular in a hot air stream or in industrial fumes, the production of a gas stream which is heated or cooled by passing through said volume of liquid, the production of a gas stream whose temperature is controlled and / or whose absolute humidity is controlled, the humidification or dehumidification of a gas stream, the depollution or filtering of a gas stream, the treatment of a gas stream by chemical reaction(s) with the liquid through which the gas stream passes, the heating or air conditioning of a room or industrial, tertiary, or domestic buildings, the control of the humidity of a room or industrial, tertiary, or domestic buildings.The resulting gas stream can also be used to cool, heat, humidify or dehumidify any type of object or surface.

[0018] With reference to the particular variant of the implementation of the figure 1 , the device 1A for the production and processing of a gaseous flow includes an exchange chamber 2 and a liquid reservoir, in the form of a tank 3 containing a liquid bath L, and for example water.

[0019] 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 in certain applications to use a liquid L whose freezing point at atmospheric pressure is below 0°C, such as water containing additives like salts, carbohydrates, glycol, or alcohol. It may also be advantageous to use oil as the liquid L.

[0020] More specifically, in this variant, of the figure 1 , the tank 3 is closed in an airtight manner, so that the liquid bath L contained in the tank 3 is isolated from the external pressure to the exchange enclosure 2, and for example is isolated from atmospheric pressure when the device 1A is in the open air.

[0021] In another variant, the tank 3 can be opened in such a way that the volume of liquid outside the exchange chambers 2 is, for example, at atmospheric pressure.

[0022] The lower face of the lower part 20 of each exchange chamber 2 is open and thus forms a liquid inlet opening 2a. The lower part 20 of each exchange chamber 2 is positioned in the tank 3, such that by filling the tank 3 with a sufficient level of liquid, the lower part 20 of each exchange chamber 2 is immersed in the liquid bath contained in the tank 3, and the immersed part of each exchange chamber 2 contains a volume V of liquid.

[0023] The exchange chamber 2 has in its upper part at least one evacuation opening 2b for a gas flow, which is positioned above the volume V of liquid contained in the exchange chamber 2.

[0024] For supplying fresh liquid to tank 3, device 1A further includes fresh liquid supply means 4 comprising a liquid supply conduit 40 which opens into tank 3, above the liquid bath, and which is equipped with a supply valve 41 for controlling the supply of fresh liquid to tank 3. In this embodiment, tank 3 and said liquid supply means 4 for tank 3 constitute liquid supply means for the heat exchange chamber 2.

[0025] Device 1A further includes evacuation means 5 comprising an evacuation conduit 50 which communicates at its lower part with the interior of the tank 3, below the surface of the liquid bath contained in the tank 3, and which is equipped with an evacuation valve 51 allowing control of the evacuation of the liquid outside the tank 3. In this variant, the tank 3 and said evacuation means 5 form means of evacuating the liquid contained in the exchange chamber 2.

[0026] In another embodiment not shown, and as described for example in international patent application WO2015 / 086979, the exchange chamber could not be immersed in the lower part in a tank 3, but could be closed in the lower part and be supplied directly with liquid by means of a pipe without the implementation of a tank 3.

[0027] Device 1A also includes aerodynamic means 6, which are capable in operation of creating an incoming gas flow F from outside the exchange chamber 2, such that this incoming gas flow F is introduced into the volume of liquid V contained in the exchange chamber 2, below the surface S of said volume of liquid, and an outgoing gas flow F', treated by direct contact with said volume of liquid, rises inside the exchange chamber 2 and is evacuated outside said exchange chamber 2 by passing through the evacuation opening 2b of the exchange chamber 2.

[0028] In the specific example of the figure 1 , the aerodynamic means 6 are capable, in operation, of creating, by aspiration, an incoming gas flow F from outside the exchange enclosure 2. In another variant the aerodynamic means 6 may be capable in operation of creating this incoming gas flow F by blowing.

[0029] In the specific example of the figure 1 , these aerodynamic means 6 include a fan 60, whose inlet 60a is connected to the outlet 2b of the exchange enclosure 2.

[0030] Fan 60 can be, for example, a centrifugal fan or any known type of gas compressor, such as, for example, an axial fan, a pump, etc.

[0031] The aerodynamic means 6 also include injection means 61 allowing the incoming gas flow F to be introduced into the volume of liquid V contained in the exchange chamber 2, below the surface S of said volume of liquid.

[0032] In the specific example of the figure 1These injection means 61 comprise a vertical injection conduit 610 positioned inside the exchange chamber 2, and having in its upper part a gas flow inlet opening 610a and in its lower part a gas flow outlet opening 610b. The inlet opening 610a communicates with a gas flow inlet pipe 611 positioned outside the exchange chamber 2. This inlet pipe has a gas flow inlet opening 611a.

[0033] Depending on the application, this inlet opening 611a can, for example, open to the open air or can be connected to any device or installation in which the gas flow F is captured.

[0034] When the fan 60 is operated, the inside of the exchange chamber 2 is depressurized. When the fan 60 is operating, the pressure in the tank 3 outside the exchange chamber 2 and above the liquid bath L is equal to the pressure Pin in the incoming gas stream F at the inlet of the injection duct 610, due to the tight seal of the tank 3. This pressure Pin is greater than the pressure Pout above the volume of liquid in the exchange chamber 2.

[0035] This pressure difference ΔP (ΔP = P in - P out ) results in the exchange chamber 2 (figure 4) being reflected by a rise in the level ( Figure 1 / height h) of the liquid in the exchange chamber 2 and by a drop in the liquid level ( Figure 1 / height H) in the tray 3 outside the exchange enclosure 2.

[0036] The volume of liquid V and the level h of liquid in the exchange chamber 2 depend on this pressure difference ΔP.

[0037] When the fan 60 is operating, it draws in an incoming gas flow F which enters the injection duct 610 of the heat exchanger 2 through the inlet opening 610a of this duct 610. This incoming gas flow F (untreated) is introduced into the non-immersed portion of the injection duct 610, passes through the discharge opening 610b of the lower submerged portion of the injection duct 610, and is introduced into the volume of liquid V contained in the lower submerged portion of the heat exchanger 2, below the surface S of said liquid volume. An outgoing gas flow F', treated by direct contact with said volume of liquid contained in the heat exchanger 2, rises inside the heat exchanger 2, outside the injection duct 610, and is discharged from said heat exchanger through the discharge opening 2b of the heat exchanger. This outgoing gas flow F' is drawn in by the fan 60 and is discharged in the form of a gas flow F" ( Figure 1 ).

[0038] Depending on the application, the air outlet 60b of this fan 60 can, for example, open to the open air or can be connected to a duct (not shown) so that the airflow F" is sent to another device or installation and is not released to the open air.

[0039] When the temperature of the volume of liquid V in the enclosure 2 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.

[0040] 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' has been reduced and may, for example, be approximately equal to the liquid temperature TLiquid of the liquid volume. As a result, the gas airflow F' exiting device 1A has been dehumidified relative to the incoming gas flow 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.

[0041] Conversely, when the temperature of the liquid volume (TLiquid) is higher than the initial temperature (TInitial), the outgoing gas flow (F') is heated and may, for example, be at a temperature approximately equal to the liquid temperature (TLiquid) of the liquid volume. Consequently, the gas flow (F') exiting device 1A is 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).

[0042] In certain applications, device 1A can be used to filter or purify the incoming gas stream F by passing it through a volume of liquid V. Device 1A can also be used to condense or evaporate one or more compounds carried by the incoming gas stream F by passing them through a volume of liquid V. Depending on the 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, an outgoing gas stream F' is produced at the outlet of device 1A, which has not been heated or cooled, but is substantially at the same temperature as the incoming gas stream F.

[0043] In the variant of the figure 1The fan 60 creates the gas flows F and F' by suction. In another variant, the fan 60 could be connected to the inlet opening 610a of the injection duct 610, so as to create these gas flows F and F' by blowing rather than by suction.

[0044] With reference to the figure 1 , device 1A includes first means of measurement 7 of a first operating parameter X out measured in the outgoing gas flow F', and in the present case in the exchange chamber 2 above the volume of liquid L.

[0045] Device 1A further includes second means of measuring 8 a second operating parameter X in measured in the incoming gas flow F', and in the present case in the inlet pipe 611 near the inlet opening 610a of the injection duct 610.

[0046] Device 1A also includes electronic control means 9 which are capable, during operation of the device, of automatically controlling the supply means 4 and the evacuation means 5 in order to automatically regulate the height h of liquid (or in other words the liquid level) in the exchange chamber 2, generally as a function at least of this first operating parameter X out and for example of at least one setpoint value Xc.

[0047] More specifically, the electronic control means 9 are capable of automatically controlling the supply means 4 and the evacuation means 5 so as to automatically regulate the height h of liquid in the exchange chamber 2 also according to the second operating parameter X in, and preferably according to the difference X out - X in (in absolute value or in algebraic value)

[0048] For example, when X out is greater than X c, or when the difference X out - X in (in absolute value) is greater than XC, the electronic control means 9 automatically control the supply means 4 so as to increase the liquid level h in the exchange chamber 2. Conversely, when X out is less than XC, or when the difference X out - X in (in absolute value) is less than XC, the electronic control means 9 automatically control the evacuation means 5 so as to decrease the liquid level h in the exchange chamber 2.

[0049] In many applications, the pressure Pin in the gas stream F at the inlet of the heat exchanger 2 and / or the pressure P out in the gas stream F' at the outlet of the heat exchanger 2 can vary uncontrollably. In the absence of control means 9, this automatically causes a variation in the liquid height h in the heat exchanger 2 to compensate for this pressure variation. This variation in liquid height causes a change in the operating point of the device, as the exchange between the gas stream and the volume of liquid in the heat exchanger is detrimentally altered in an uncontrolled manner.In some applications also, even if the pressure P in in the gas flow at the inlet of the exchange chamber 2 and the pressure P out of the gas flow at the outlet of the exchange chamber 2 are constant over time, it may be useful to be able to vary the operating point of the device, and therefore to be able to vary the level of exchange between the gas flow and the volume of liquid, in order for example to make it optimal.

[0050] Thus, in a first variant of the embodiment, the first operating parameter X out can be the pressure P out (X out = P out ) in the treated gas flow F' and the second operating parameter X in can be the pressure P in (X in = P in ) in the incoming gas flow F, the first 7 and second 8 means of measurement being for example Pitot probes.

[0051] By automatically regulating the height h of liquid in the exchange chamber 2 as a function of the pressure P out, and more particularly of the pressure difference P out - P in, we ensure that the operating point of the installation, and therefore the quality of the exchange between the incoming air flow F and the liquid in the chamber 2, is always correct, regardless of the pressure Pin and Pout.

[0052] In a second variant the first operating parameter X out can be the temperature T out (X out = T out ) measured in the treated gas flow F' and the second operating parameter X in can be the temperature T in (X in = T in ) measured in the incoming gas flow F, the first 7 and second 8 means of measurement being in this case temperature probes.

[0053] In a third variant the first operating parameter X out can be the concentration C out (X out = C out ) of a component (chemical or particulate) measured in the treated gas stream F' and the second operating parameter X in can be the concentration C in (X in = C in ) of this component measured in the incoming gas stream F, the first 7 and second 8 means of measurement being in this case probes for detecting this component.

[0054] As a non-limiting and non-exhaustive example, in the case of treating gas streams composed of combustion fumes, particularly industrial fumes, the chemical component may be nitrogen oxides (NOx), with the volume of liquid in the heat exchanger being used to capture these nitrogen oxides. In other applications, the chemical compounds captured in the liquid may, but are not limited to, be selected from the following list: VOCs (volatile organic compounds), SOx, PAHs (polycyclic aromatic hydrocarbons), CO, CO2, NH3, and chloramines.

[0055] We have represented on the figure 2 , another device 1B of the invention, which differs from device 1A of the figure 1 through implementation: first means of measurement 7' of a first operating parameter (X out) measured in the liquid contained in the exchange chamber 2 second means of measurement 8' of a second operating parameter (X in) measured in the liquid contained in the tank 3 outside the exchange chamber 2.

[0056] In another variant, the first operating parameter (X out) can be measured in the liquid coming from the exchange chamber 2.

[0057] In another variant, the second operating parameter (X in ) can be measured in the new liquid before its introduction into the tank 3, and therefore before its introduction into the exchange chamber 2, for example by being measured in the supply line 40 upstream or downstream of the valve 41.

[0058] Within the framework of the invention, this first operating parameter (X out) can be the concentration (CL out) of a compound in the liquid contained in the exchange chamber 2 and the second parameter can be the concentration (CL in) of this compound in the liquid outside the exchange chamber 2.

[0059] Within the framework of the invention, this first operating parameter (X out) can be the pH (pH out) of the liquid contained in the exchange chamber 2 and the second parameter can be the pH (pH in) of the liquid outside the exchange chamber 2, the first 7' and second 8' means of measurement being in this case pH measuring probes.

[0060] In an improved embodiment of the invention, in addition to regulating the liquid height h in the exchange chamber 2, the electronic control means 9 can also be designed, and for example programmed, to automatically control the valves 41 and 51 so as to allow continuous or discontinuous renewal of the liquid in the exchange chamber 2, preferably during operation of the device, as a function of a parameter measured in the liquid in the exchange chamber 2 or coming from the exchange chamber 2 and / or a parameter measured in the new liquid before its introduction into the exchange chamber 2, such as for example the pH of the liquid and / or the concentration of a compound in the liquid and / or the temperature of the liquid and / or as a function of a parameter measured in the incoming gas stream (F) and / or a parameter measured in the outgoing gas stream (F'),such as, in particular, the temperature of the gas stream or the concentration of a component in the gas stream.

Claims

1. Device for producing and treating a gas stream (F), which device comprises an exchange enclosure (2) having at least one first opening (2b) for discharging a gas stream, means (3; 4) for supplying the enclosure with a liquid (L) such that the exchange enclosure (2) can contain a volume (V) of this liquid with said first discharge opening (2b) of the exchange enclosure being positioned above the surface (S) of the volume of liquid (V) contained in the exchange enclosure, means (3; 5) for discharging the liquid (L) contained in the exchange enclosure (2) and aeraulic means (6), which are capable, during operation, of creating, by suction or blowing, an incoming gas stream (F) coming from the outside of the exchange enclosure (2), such that this incoming gas stream (F) is introduced into the volume of liquid (V) contained in the exchange enclosure (2), below the surface (S) of said volume of liquid, and such that an outgoing gas stream (F') treated by direct contact with said volume of liquid rises up inside the exchange enclosure and is discharged out of said exchange enclosure (2) by passing through the discharge opening (2b) of the exchange enclosure (2), characterized in that said device further comprises first means (7) for measuring a first operating parameter (Xout) measured in the outgoing gas stream (F') or first means (7') for measuring a first operating parameter (Xout) measuring the concentration (CLout) of a compound in the liquid contained in the exchange enclosure (2) or coming from the exchange enclosure (2), or measuring the pH (pHout) of the liquid contained in the exchange enclosure (2) or coming from the exchange enclosure (2), and in that said device comprises electronic control means (9) for automatically controlling the supply means (3; 4) of the exchange enclosure and the discharge means (3; 5) of the exchange enclosure so as to automatically adjust the height (h) of liquid in the exchange enclosure depending on at least this first operating parameter (Xout).

2. Device according to claim 1, wherein the first operating parameter (Xout) is the pressure (Pout) measured in the exchange enclosure (2) above the volume of liquid or is the temperature (Tout) of the outgoing gas stream (F'), or is the concentration (Cout) of a component in the outgoing gas stream (F').

3. Device according to any one of the preceding claims, further comprising second means (8; 8') for measuring a second operating parameter (Xin) outside the outgoing gas stream (F'), and wherein the electronic control means (9) are capable of automatically controlling the supply means (3; 4) of the exchange enclosure (2) and the discharge means (3; 5) of the exchange enclosure (2) so as to automatically adjust the height (h) of liquid in the exchange enclosure (2) depending also on this second operating parameter (Xin).

4. Device according to claim 3, wherein the second measuring means (8) are capable of measuring said second operating parameter (Xin) in the incoming gas stream (F).

5. Device according to claim 4, wherein the second operating parameter (Xin) is the pressure (Pin) measured in the incoming gas stream (F).

6. Device according to claim 4, wherein the second operating parameter (Xin) is the temperature (Tin) of the incoming gas stream (F), or is the concentration (Cin) of a component in the incoming gas stream (F).

7. Device according to claim 3, wherein the second operating parameter (Xin) is the concentration (CLin) of a compound in the liquid outside the exchange enclosure (2).

8. Device according to claim 3, wherein the second operating parameter (Xin) is the pH (pHin) of the liquid outside the exchange enclosure (2), and more particularly in the new liquid before its introduction into the exchange enclosure (2).

9. Device according to any one of claims 3 to 8, wherein the electronic control means (9) are capable of automatically controlling the supply means (3; 4) of the exchange enclosure (2) and the discharge means (3; 5) of the exchange enclosure (2) depending on the difference between the first operating parameter (Xout) and the second operating parameter (Xin).

10. Device according to any one of the preceding claims, wherein the liquid supply means (3; 4) of the exchange enclosure (2) comprise a supply (3) of liquid (L), and the bottom of the exchange enclosure (2) comprises at least one liquid intake opening (2a) and is submerged in the liquid supply (3).

11. Device according to claim 10, wherein the supply (3) of liquid is sealed such that the pressure (Pin) in the supply (3) above the liquid is equal to the pressure in the incoming gas stream (F).

12. Device according to any one of the preceding claims, the electronic control means (9) are capable of automatically controlling the supply means (3; 4) of the exchange enclosure and the discharge means (3; 5) of the exchange enclosure so as to allow a continuous or discontinuous renewal of the liquid in the exchange enclosure (2) depending on a parameter measured in the liquid of the exchange enclosure (2) or coming from the exchange enclosure (2) and / or on a parameter measured in the new liquid before its introduction into the exchange enclosure (2), such as the pH of the liquid and / or the concentration of a compound in the liquid and / or the temperature of the liquid, and / or depending on a parameter measured in the incoming gas stream (F) and / or on a parameter measured in the outgoing gas stream (F'), such as in particular the temperature of the gas stream or the concentration of a component in the gas stream.

13. Use of at least one device according to any one of the preceding claims for producing at least one gas stream (F') which has been treated by passing an incoming gas stream (F) through a volume of liquid contained in the exchange enclosure (2) of the device.

14. Use according to claim 13 for filtering and / or cleaning up and / or cooling and / or heating an incoming gas stream (F).

15. Use according to either claim 13 or claim 14 for treating a stream of an incoming gas stream (F) resulting from combustion or an incoming gas stream (F) containing industrial fumes, and in particular high-temperature industrial fumes, or a gas stream containing at least one of the compounds selected from the following list: NOx (nitrogen oxide), VOC (volatile organic compound), SOx (sulfur oxide), PAH (polycyclic aromatic hydrocarbon), CO, CO2, NH3, and chloramine.