| 摘要 |
An improved multiple stage and compact form of venturi type scrubber unit adapted for cleaning gaseous streams laden with extremely fine particulates, with such unit providing a downflow of the gaseous stream through a venturi throat section along with recycle slurry to effect high velocity wetting of entrained particles. The discharge of wetted gas and particles is, in turn, downwardly from an elongated diffuser section or energy regain tube toward a lower slurry collecting zone whereby the gaseous stream flow is caused to reverse 180 DEG and then pass upwardly through loose light weight mobile packing maintained in between vertically spaced apart perforate retainer means to effect particulates and mist removal in the presence of a counter-currently flowing liquid stream being introduced above such removal zone. A preferred embodiment utilizes a flexible venturi throat section which is mechanically adjustable to provide a variable cross-sectional area that will be changed responsive to variations in gas and liquid volumes and in turn sustain a substantially constant pressure drop across such throat section. Also, the unit may incorporate a plurality of sloping vane means above the mobile packing zone to effect further liquid de-entrainment from the clean gas stream prior to its discharge from the unit.
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