Waste processing and recovery system
AssigneeDensified Solutions, L.L.C.
InventorsJohn W. Rickett, Kevin L. Lyons
Life of this patent
Estimating the term…
Abstract
A waste disposal and recovery system for disposal of expanded polystyrene foam and recovery of a usable resin. The system includes a first tank and a second tank in flow communication. Within the second tank may be a plurality of settlement compartments with a filtration system. An organic solvent is used to dissolve the EPS foam which forms a waste solution. The waste solution is directed to the second tank where it is separated into resin and the organic solvent. The solvent may be recycled for use in dissolving more EPS foam while the resin may be removed for storage, shipment or sale.
Claims11
A process for dissolving expanded polystyrene foam and recovering an organic solvent and a resin, comprising:
- a. directing an organic solvent into a first tank;
- b. disposing an expanded polystyrene foam in said first tank;
- c. dissolving said expanded polystyrene foam into a polystyrene waste solution in said first tank;
- d. straining and directing said waste solution to a fluid outlet in said first tank;
- e. flowing said waste solution to a second tank having a first compartment, a second compartment, and a third compartment, said waste solution being deposited in said first compartment;
- f. separating said waste solution into a resin and an organic solvent by settling in said first compartment;
- g. extracting said organic solvent through a filtration system;
- h. directing said extracted organic solvent to a second compartment and separating therein;
- i. directing said extracted solvent over a weir to a third compartment;
- j. recirculating said extracted organic solvent from said third compartment to said first tank;
- and,
- k. pumping said resin from said second tank.
A process for disolving expanded polystyrene foam and recovering an organic solvent and a resin, comprising:
- a. disposing an expanded polystyrene foam in said first tank;
- b. pumping an organic solvent into a first tank through at least one nozzle;
- c. dissolving said expanded polystyrene foam into a polystyrene waste solution in said first tank;
- d. straining and pumping said waste solution through a fluid outlet in said first tank to said second tank;
- e. said second tank having a first compartment, a second compartment, and a third compartment, said waste solution being deposited in said first compartment;
- f. separating said waste solution into a resin and an organic solvent by gravity in said first compartment;
- g. flowing said organic solvent through a filtration system;
- h. directing said extracted organic solvent to a second compartment and separating therein;
- i. directing said extracted solvent over a weir to a third compartment;
- j. pumping said extracted organic solvent from the third compartment to said first tank;
- and
- k. pumping said resin from said second tank when said process is complete.
Dependencies are inferred from the claim text.