Contaminated Solvent Recycling System
OwnerCharles Harland, Dennis William Mount +1inventors
InventorsCharles Harland, Dennis William Mount, Mathieu Fredette
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Abstract
A contaminated solvent recycling system comprises a distillation vessel having a distillation zone and a separate waste collection zone and heating means for heating contaminated solvent feed within the distillation zone vessel to distill off the solvent. By separating the distillation zone from the waste collection zone, the distillation zone can be made small enough to process small consecutive batches of contaminated solvent feed whilst the waste collection zone can be made large enough to accommodate waste accumulating from the distillation process for extended periods of time between waste removal operations.
Claims36
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A distillation unit for use in a contaminated solvent recycling system for recycling clean solvent from a contaminated solvent feed, said distillation unit comprising:
- a distillation vessel and heating means for heating contaminated solvent feed within said vessel;
- said distillation vessel holding a single volume of liquid and comprising a distillation zone and a separate waste collection zone located directly beneath said distillation zone for collecting waste from the distillation process;
- waste being displaced from said distillation zone into said waste collection zone before said waste accumulates in said distillation zone to a sufficient extent to impede the operation of said distillation unit;
- said heating means being disposed so as to heat solvent for which waste has been displaced away from said heating means;
- means for introducing said contaminated solvent feed into said distillation zone;
- and means for removing said waste from said waste collection zone,
- wherein said distillation zone is confined to a top part of the distillation vessel by heating only the upper region of the distillation vessel and providing the separate waste collection zone within the distillation vessel,
- and wherein the arrangement is such that waste falls away from the distillation zone to the waste collection zone.
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