System and method of processing solid waste
AssigneeRecycling Solutions Technology, LLC
InventorsDavid F. May, David F. May, Jr., John W. Burke, Jr.
Life of this patent
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Abstract
A system and associated method of processing solid waste via a waste gasification process results in usable by-products. The method utilizes a rotary kiln heated to a temperature of at least 800° F. and a reduction chamber, heated to a temperature of at least 1800° F. The solid waste is slowly rotated in the kiln for six to eight hours. The solid material is passed through screens to separate the ash from other items. Gases are monitored and transported to the reduction chamber to generate power. The gases are then transported to at least one air pollution control unit to remove contaminants before being vented into the atmosphere.
Claims28
A method of processing solid waste comprising:
- heating a rotary kiln;
- feeding the solid waste into the rotary kiln;
- rotating the rotary kiln, thereby generating gases and residual solids;
- removing the residual solids from the rotary kiln;
- transporting the gases from the rotary kiln to a reduction chamber;
- heating the gases in the reduction chamber;
- cooling the gases exiting the reduction chamber;
- transporting the gases to a spray dryer absorber;
- treating the gases in the spray dryer absorber to remove contaminants by introducing lime and carbon water mist in the spray dryer absorber;
- transporting the gases from the spray dryer absorber to a baghouse;
- and
- removing further contaminants from the gases in the baghouse.
A method of processing solid waste, said method comprising:
- feeding the solid waste into an interior of a rotary kiln at a predetermined feed rate;
- rotating the rotary kiln at a predetermined rotation speed;
- introducing air into the interior of the rotary kiln;
- heating the solid waste in the interior of the rotary kiln, thereby generating gases and residual solids;
- ducting the gases generated in the rotary kiln to a reduction chamber;
- adjusting at least one of the feed rate of the solid waste into the interior of the rotary kiln, rotation speed of the rotary kiln, and airflow into the interior of the rotary kiln to maintain the temperature of the gases exiting the rotary kiln at between 800-1200 degrees Fahrenheit;
- ducting the gases from the reduction chamber to a spray dryer absorber;
- introducing lime and carbon water mist into the spray dryer absorber;
- and
- transporting the gases from the spray dryer absorber to a baghouse.
A system for processing solid waste, said system comprising:
- a rotary kiln having drive means for rotating the rotary kiln;
- a feeder for feeding said solid waste into said rotary kiln;
- a heating system for heating the rotary kiln;
- a reduction chamber adapted to receive and burn gases generated in the rotary kiln;
- a heating system for heating the reduction chamber;
- a spray dryer absorber located downstream of the reduction chamber;
- a sprayer located at the top of the spray dryer absorber for spraying a lime slurry into said spray dryer absorber to remove contaminants from said gases;
- and
- a hopper adapted to receive residual solids generated in the rotary kiln.
Dependencies are inferred from the claim text.