초록 ▼

A process and apparatus is disclosed for the removal of pollutant material including solid or liquid particulate matter and gaseous pollutants from gas streams in which the gas is driven through a mixing tube by forming a jet of a compressible fluid such as steam or air or the whole or a part of the

A process and apparatus is disclosed for the removal of pollutant material including solid or liquid particulate matter and gaseous pollutants from gas streams in which the gas is driven through a mixing tube by forming a jet of a compressible fluid such as steam or air or the whole or a part of the polluted gas itself. In some instances the jet acts as an ejector to induce flow of the polluted gas into the mixing tube but when all of the polluted gas is formed into a jet it is directed into the mixing tube without any ejector action. A mechanically atomized liquid is introduced into the outer region of the jet of compressible fluid emerging from the nozzle in which the jet is formed. The mechanically atomized liquid is further atomized by the shearing action of the jet to form high velocity droplets which are intimately and turbulently mixed with the pollutant-containing gas and retained in the mixing tube for a sufficient time so that the pollutants become entrained with the water droplets. The turbulent mixture is then directed into a diffuser having an increasing cross-sectional area and deflected as it enters the diffuser away from one portion of the interior surface of the diffuser and toward an opposite portion of the interior surface of the diffuser and also decelerated so as to cause a separation in the flow of the liquid and non-liquid constituents of the mixture. Apparatus is disclosed including a compressible fluid nozzle for forming the jet and a liquid injector, a mixing tube, a diffusEr, and fluid and mechanical separating means whereby a separate flow of the particulate material including submicronic sized particulate entrained in liquid droplets is established in the diffuser for removal from the cleaned gas stream. If it is desired to remove reactive gaseous pollutants from a gas stream, appropriate chemical reagents may be added to the injected liquid or directly to the gas stream prior to treatment.

대표청구항 ▼

In a process for the removal of pollutant material comprising particulates from a polluted gas which includes driving a stream of said polluted gas through a mixing tube by forming and discharging from a nozzle means a jet of pressurized compressible fluid such as steam or air or the whole or a part

In a process for the removal of pollutant material comprising particulates from a polluted gas which includes driving a stream of said polluted gas through a mixing tube by forming and discharging from a nozzle means a jet of pressurized compressible fluid such as steam or air or the whole or a part of the polluted gas itself directed into the mixing tube, forming a series of jet sprays of liquid in a first atomized condition disposed circumferentially about said jet of compressible fluid, further atomizing said liquid by directing said jet sprays into the outer region of said jet of compressible fluid as it emerges from said nozzle means for forming a mixture comprising said polluted gas and said liquid in the form of further atomized droplets flowing through said mixing tube, said mixture as it approaches the exit end of said mixing tube comprising the liquid droplets encapsulating substantially all of the particulates initially contained in said stream of polluted gas; the improvement which comprises directing said mixture containing said droplets from said mixing tube into a diffuser having gradually increasing cross-sectional area defined by an inner surface comprising opposed diverging surface portions, deflecting the flow of said mixture as it enters said diffuser away from one of said opposed diverging surface portions of said diffuser and toward the other of said opposed diverging surface portions to cause deentrainment of said droplets from said mixture.