Minimization of environmental wastes

Patent · Tue Dec 18 04:00:00 EST 1990

OSTI ID:5166440

Summers, W A

This patent describes an improved process for the conversion of environmental waste streams to useful and desirable products. It comprises: heating an environmental waste stream at a first elevated temperature within the range from about 240{degrees} to about 700{degrees} F., whereby dehydration occurs and moisture and dissolved gases are liberated therefrom to afford a dried waster stream feed material; comminuting the dried waste stream feed material; pyrolyzing the comminuted, dried waste stream feed material at a second elevated temperature within the range from about 700{degrees} to about 1400{degrees} F., whereby pyrolytic liquid and gaseous fractions are liberated to afford a waste stream solid residue, substantially comprising char and ash; gasifying the waste stream solid residue at a third elevated temperature within the range from about 1400{degrees} to about 3000{degrees} F., whereby additional liquid and gaseous fractions are liberated to afford a solid residue product, substantially comprising ash; recovering the solid residue product; and separately recovering the pyrolytic liquid and gaseous fractions and the additional liquid and gaseous fractions.

• Assignee: American Waste Reduction Corp., Munster, IN (USA)
• Patent Number(s): US 4977840; A
• Application Number: PPN: US 7-410386
• OSTI ID: 5166440
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
320604 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
CHEMICAL REACTIONS
COMMINUTION
DECOMPOSITION
DRYING
GASIFICATION
LIQUID WASTES
MANAGEMENT
PROCESSING
PYROLYSIS
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PRODUCT UTILIZATION
WASTES