Device for producing and treating a gas stream through a volume of liquid, and facility and method implementing said device

A device for producing and treating a gas stream, said device including an enclosure, of which the lower part is submerged in a liquid bath outside the enclosure, the enclosure includes at least one liquid intake opening, said at least one liquid intake opening placing an internal chamber of the enclosure in fluid communication with the liquid bath, such that the submerged lower part of the enclosure contains a volume of the liquid bath, the enclosure includes at least one opening for discharging a gas stream positioned above the surface of the volume of liquid contained in the submerged lower part of the enclosure, the device further including means for producing and injecting a gas stream including at least one injection conduit, of which a lower part is submerged in the volume of liquid contained in the submerged lower part of the enclosure, the at least one injection conduit extends in the upper part inside the enclosure above said volume of liquid contained in the submerged lower part of the enclosure, the submersion depth of the injection conduit being between 20 mm and 200 mm, and said injection conduit including, in said submerged lower part of the injection conduit, at least one discharge opening positioned below the surface of said volume of liquid contained in the submerged lower part of the enclosure, said means for producing and injecting a gas stream include a compressor connected to the non-submerged part of the injection conduit, and said compressor, during operation, creates and introduces an incoming gas stream, coming from outside the enclosure, in the non-submerged part of the injection conduit, with a flow rate of at least 100 m3/h, and such that said incoming gas stream passes through the discharge opening of the submerged lower part of the injection conduit, and is introduced into said volume of liquid contained in the submerged lower part of the enclosure, below the surface of said volume of liquid, and such that an outgoing gas stream, treated by direct contact with said volume of liquid, rises inside the enclosure outside the injection conduit and is discharged outside said enclosure, passing through the discharge opening of the enclosure;

• and
• wherein the discharge opening of the injection conduit is positioned at the same level as the liquid intake opening of the submerged lower part of the enclosure or above the level of the liquid intake opening of the submerged lower part of the enclosure.

A device for producing and treating a gas stream, said device including an enclosure, of which the lower part is submerged in a liquid bath outside the enclosure, the enclosure includes at least one liquid intake opening, said at least one liquid intake opening placing an internal chamber of the enclosure in fluid communication with the liquid bath, such that the submerged lower part of the enclosure contains a volume of the liquid bath, the enclosure includes at least one opening for discharging a gas stream positioned above the surface of the volume of liquid contained in the submerged lower part of the enclosure, the device further including means for producing and injecting a gas stream including at least one injection conduit, of which a lower part is submerged in the volume of liquid contained in the submerged lower part of the enclosure, the at least one injection conduit extends in the upper part inside the enclosure above said volume of liquid contained in the submerged lower part of the enclosure, the submersion depth of the injection conduit being between 20 mm and 200 mm, and said injection conduit including, in said submerged lower part of the injection conduit, at least one discharge opening positioned below the surface of said volume of liquid contained in the submerged lower part of the enclosure, said means for producing and injecting a gas stream include a compressor connected to the non-submerged part of the injection conduit, and said compressor, during operation, creates and introduces an incoming gas stream, coming from outside the enclosure, in the non-submerged part of the injection conduit, with a flow rate of at least 100 m3/h, and such that said incoming gas stream passes through the discharge opening of the submerged lower part of the injection conduit, and is introduced into said volume of liquid contained in the submerged lower part of the enclosure, below the surface of said volume of liquid, and such that an outgoing gas stream, treated by direct contact with said volume of liquid, rises inside the enclosure outside the injection conduit and is discharged outside said enclosure, passing through the discharge opening of the enclosure;

• wherein for recovering calories in an incoming gas stream, and including an energy recovery system to recover at least part of the calories captured in the liquid from the bath of said device;
• and
• wherein the energy recovery system includes a closed circuit in which a heat transfer fluid circulates, and which comprises an evaporator allowing a heat exchange with the liquid in the bath.