Desorbtion process and apparatus
OwnerJim Smith Hoganinventor
Life of this patent
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Abstract
A method and apparatus for desorbtion is disclosed that utilizes enhancements to lessen the amount of entrained particles formed during desorbtion and for lowering the operating and capital costs associated with desorbtion equipment. Multiple stage desorbtion is contemplated using multiple drums, with smaller drums being employed for volatizing the waste components that require high temperatures. The method and apparatus may include an eductor scrubber attached directly or adjacent to the gas extraction port of a drum to prevent fouling of system apparatus. A plunger for cleaning the scrubber suction chamber is provided. The method and process may include injecting hot gas, which may be exhaust gas from a burner apparatus, into one or more desorption drums to lower heating costs.
Claims49
A desorbtion method comprising:
- (a) conveying waste material into a first drum, said first drum having a first gas extraction port;
- (b) sealing the waste material in said first drum;
- (c) heating the waste material in said first drum to a preselected first temperature sufficient to volatize at least one component of the waste material and form a gas;
- (d) extracting the gas from said first drum through said first gas extraction port;
- (e) conveying the waste material remaining after step (c) into a second drum, said second drum having a second gas extraction port;
- (f) sealing the waste material in said second drum;
- (g) heating the waste material in said second drum to a second temperature greater than said first temperature to volatize a component of the waste material and form a gas;
- (h) extracting the gas from said second drum through said second gas extraction port.
A method for the recovery of selected materials from waste comprising:
- (a) depositing waste material into a first drum, said first drum having a first internal volume and a first gas extraction port;
- (b) sealing the waste material in said first drum;
- (c) heating the waste material in said first drum to a temperature sufficient to volatize at least one component of the waste material and form a gas;
- (d) extracting the gas from said first drum through said first gas extraction port;
- (e) placing the waste material remaining after step (d) into a second drum, said second drum having a second gas extraction port and a second internal volume smaller than said first internal volume;
- (f) sealing the waste material in said second drum;
- (g) heating the waste material in said second drum to a temperature sufficient to volatize at least one component of the waste material and form a gas;
- (h) extracting the gas from said second drum through said second gas extraction port.
Apparatus for treating waste material and recovering selected products therefrom comprising:
- a first drum having a first interior volume and a first gas extraction port;
- a second drum having a second interior volume smaller than said first interior volume and having a second gas extraction port;
- a heater heating the waste material in said first drum to a temperature and for a time sufficient to volatize at least one component of the waste material and form a gas of said component;
- a conveyor for moving the waste material that is not volatized from said first drum to said second drum;
- a heater heating the waste material in said second drum to a temperature and for a time sufficient to volatize at least one component of the waste material and form a gas of said component;
- a conveyor for moving the waste material that is not volatized out of said second drum.
Apparatus for treating waste material and recovering selected products therefrom comprising:
- a rotatable desorbtion drum having first and second ends and a heating section there between;
- a waste inlet in said drum for receiving waste material into said drum;
- a heater heating the waste material in the heating section of said drum to a temperature and for a time sufficient to volatize at least one component of the waste material and form of gas;
- a gas extraction port in said drum permitting a gas formed in the drum to be extracted from the drum;
- an eductor scrubber having an inlet to a suction chamber positioned adjacent to said gas extraction port;
- said eductor scrubber drawing the gas formed in said drum through said gas extraction port into said suction chamber.
A method for removing vapors generated in a desorbtion drum having a gas extraction port, the method comprising:
- positioning an eductor scrubber adjacent to said gas extraction port;
- and injecting a motive fluid into said eductor scrubber to draw vapors from the desorber drum into the eductor scrubber.
A desorbtion method comprising:
- (a) conveying waste material into a desorbtion drum, said drum having a gas extraction port;
- (b) sealing said drum from the ambient atmosphere;
- (c) conveying hot gas into said drum to heat the waste material to a preselected temperature sufficient to volatize at least one component of the waste material and form a vapor;
- (d) extracting the vapor from said drum through said gas extraction port.
Dependencies are inferred from the claim text.