US PATENT SUBCLASS 202 / 122
.~.~.~.~.~ With recuperator

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
96  DF  .~.~ Thermolytic {5}
105  DF  .~.~.~ Retort {14}
120  DF  .~.~.~.~ Vertical {4}
122.~.~.~.~.~ With recuperator

DEFINITION

Classification: 202/122

The retorts are vertical, and the air and/or gas for combustion is heated by the waste products of combustion through double surface heaters.

SEE OR SEARCH CLASS

201, Distillation: Processes, Thermolytic,

15+, for a carbonizing process including burning a product of the carbonizing step and recovering heat from a product by indirect heat exchange and subclass 37, for a process in which externally produced combustion gases are passed through the retort.