Method of continuously carbonizing a mixture of primarily organic waste material
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United States of America Patent
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Mar 13, 1990
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N/A
app pub date -
Dec 28, 1988
filing date -
Dec 28, 1988
priority date (Note) -
Expired
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Abstract
A method of continuously carbonizing a mixture of primarily organic waste material to a high British Thermal Unit char product wherein a stream of comminuted garbage material with a substantial organic material content is fed to one end of a mixer barrel, the material is compressed to form a barrel filling mass functioning as a first vapor block, and the work energy required to compress it and squeeze out entrapped air is used virtually exclusively to raise the temperature of the material adiabatically, air and any steam created are vented, the material downstream from the first vapor block is decompressed in a second vent region, the material is recompressed in the absence of air to form another vapor block, while exclusively utilizing the work energy required to compress it to raise the temperature of the material abiabatically to a volatile releasing temperature in the neighborhood of 400.degree. F. to 600.degree. F. and to carbonize the material, the volatiles are vented, and the product is discharged as a dry, friable particulate char.
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