Patent ID: 7250142

Claim:
Device for mixing and distributing a dense, generally liquid, fluid and a light, generally gaseous, fluid, placed in a reaction chamber upstream from a granular bed or between two successive granular beds, the said device comprising: a more or less horizontal plate ( 62 ) in the reaction chamber, covering all of the cross-section of the reaction chamber and supporting, a multiplicity of substantially vertical pipes ( 60 ) which pipes include an upper end communicating with the part of the reaction chamber situated above the plate ( 62 ), a lower end communicating with the part of the reaction chamber situated below the plate ( 62 ), the said pipes being pierced, in the upper end and extending to a lowest level which is above the level of the plate, by lateral orifices ( 63 ) permitting the introduction of the dense fluid and of some of the light fluid inside the said pipes ( 60 ), a tubular system ( 50 ) extending downwardly from above the vertical pipes into the reaction chamber for the introduction of the dense fluid from outside the reaction chamber into a volume surmounting the horizontal plate ( 62 ), which volume is above the plate and below the lowest level of said lateral orifices ( 63 ), the tubular system having exit slots for the dense fluid that are wholly immersed in the said volume surmounting the plate ( 62 ), and means for introducing said light fluid into the reaction chamber above the level of the plate ( 62 ).