Apparatus for dissociating bulk waste in a molten metal bath

• US 5,555,822 A
• Filed: 09/06/1994
• Issued: 09/17/1996
• Est. Priority Date: 09/06/1994
• Status: Expired due to Fees

• Current Assignee: Quantum Catalytics LLC
• Original Assignee: Molten Metal Technology Incorporated
• Inventors: Loewen, Eric P., White, Arthur W.
• Primary Examiner(s): Bennett, Henry A.
• Assistant Examiner(s): TINKER, SUSANNE CHRISTINE
• Application Number:
  US08/301,235
• Time in Patent Office: 742 Days
• Field of Search: 110/235, 110/237, 110/346, 588/201, 423/210.5, 423/DIG. 12
• US Class Current: 110/237
• CPC Class Codes: C03B 18/00 Shaping glass in contact with the surface of a liquid
• CPC Class Codes: C03B 5/00 Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
• CPC Class Codes: C03B 5/005 of glass-forming waste materials disposal or transformation of solid waste in general B09B; treatment of radioactive waste G21F9/00
• CPC Class Codes: C21B 3/04 Recovery of by-products, e.g. slag
• CPC Class Codes: C22B 7/001 Dry processes
• CPC Class Codes: C22B 7/02 Working-up flue dust
• CPC Class Codes: Y02P 10/20 Recycling
• CPC Class Codes: Y02P 40/50 Glass production, e.g. reusing waste heat during processing or shaping
• CPC Class Codes: Y02W 30/50 Reuse, recycling or recovery technologies

Abstract

A reactor includes a bulk waste inlet and a gas outlet. A baffle within the reactor has a lower edge which can be immersed by a molten metal bath within the reactor. The baffle partitions are gaseous volume above the molten metal bath into a first region, proximate to the bulk waste inlet, and a second region, proximate to the gas outlet. The gas conduit extends from the first region to a portion of the reactor beneath the second region. Gas is directed from the first region through the gas conduit to a portion of the molten metal bath beneath the second region. The gas pressure is thereby equalized above the molten metal bath in the first and second regions during dissociation of bulk waste directed into the first region.

Claims

1. A reactor for dissociating bulk waste in a molten metal bath, comprising:

a) a bulk waste inlet;

b) a gas outlet;

c) a baffle within said reactor, said baffle having a lower edge which can be immersed by a molten metal bath within said reactor, whereby the baffle partitions a gaseous volume above the molten metal bath into a first region, proximate to said bulk waste inlet, and a second region, proximate to said gas outlet;

d) a gas conduit extending from said first region to a portion of said reactor beneath the second region; and

e) means for directing gas from the first region through the gas conduit into a portion of the molten metal bath beneath the second region, thereby equalizing gas pressure above the molten metal bath in the first and second regions during introduction of bulk waste into the first region.

2. The reactor of claim 1, further including a back-pressure control valve at the gas outlet, for controlling gas pressure within the second region above the molten metal bath in the reactor.

3. The reactor of claim 2, wherein the means for directing gas from the first region to said portion of the molten metal bath beneath the second region includes a venturi tube and a pressurized gas source.

4. The reactor of claim 3, wherein the first region extends vertically to an elevation above that of the second region.

5. The reactor of claim 4, further including means for cooling the baffle.

6. The reactor of claim 5, further including means for heating the first region.

7. The reactor for claim 6, wherein the means for cooling the baffle and the means for heating the first region include a heat transfer tube extending from the baffle to the first region, whereby a liquid medium recirculating through the heat transfer tube can transfer heat from the baffle to the first region thereby cooling the baffle and heating the first region.

8. In a reactor which includes a bulk waste inlet and a gas outlet, and which is suitable for containing a molten metal bath:

the improvement comprising a baffle which partitions a gas volume above the molten metal bath into a first region, proximate to the bulk waste inlet, and a second region, proximate to the gas outlet, a gas conduit extending from said first region to a portion of the reactor beneath the second region, and means for directing gas from the first region through the gas conduit into a portion of the molten metal bath beneath the second region, thereby equalizing gas pressure above the molten metal bath in the first and second regions during introduction of bulk waste into the first region.