(under the class definition) Processes including using a product of the carbonizing step as an indirect source of heat.
(1) Note. A hot product of the thermolytic distillation process may be utilized as such as an indirect source of heat or further treated before recovering the heat therefrom by indirect heat exchange.
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28+, for a process in which heat is incidently and directly recovered by recirculating a hot product of the carbonizing step to the carbonizing zone.
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34, Drying and Gas or Vapor Contact With Solids,
513, for a process including conserving heat by indirect heat exchange. 165, Heat Exchange,
4+, for a device for alternately heating a mass with a fluid and then heating a second fluid with the stored heat.
196, Mineral Oils: Apparatus,
134, for apparatus for vaporizing mineral oils including means for heat recovery from the vapor or residuum.
202, Distillation: Apparatus,
146, for a horizontal retort with flues wherein the air and/or gas combustion is heated by the waste products of
combustion by means of a single-surface heater and subclass 150 for a similar apparatus using a double surface heater.
203, Distillation: Processes, Separatory,
21+, for a process of distilling a liquid in which heat is recovered by indirect heat exchange.
237, Heating Systems, appropriate subclass, for a heating system which may use the heat rejected portion of a refrigeration system with additional heating means.
588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the use of a carbonization product as an indirect heat source to destroy hazardous or toxic waste.
