STP1043

    Elimination of Precoat Filter Sludge Hazardous Waste

    Published: Jan 1989


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    Abstract

    Hazardous waste disposal regulations forced a reconsideration of process and product quality requirements to eliminate the need to treat and dispose of a hazardous sludge containing flammable solvents. This resulted in a new liquid cyclone process to replace the precoat filter system, which generated hazardous waste sludge. Besides eliminating a complex, labor-intensive, material-wasting process, replacement of the precoat filter prevented further generation of ignitable hazardous waste.

    The new process, using liquid cyclones to make the required liquid-solids separation, must have a gas-free feed for efficient operation. Beneficial particle classification, a result of the cyclone process, improved material efficiencies and had no discernible negative effects on product quality.

    The liquid cyclone system designed to separate suspended solids from a polymer solution, and its interrelation with the contiguous processes are described in this paper. Product and beneficial process changes resulting from the system change are also discussed.

    Keywords:

    liquid cyclones, hazardous waste, precoat filter sludge, flammable solvents, solvent sludge, extraction, solids removal, waste minimization


    Author Information:

    Kieffer, RJ
    Associate engineer, Flexel Kansas, Inc., Tecumseh, KS


    Paper ID: STP20090S

    Committee/Subcommittee: D34.14

    DOI: 10.1520/STP20090S


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