Appeal No. 95-2741
Application 08/008,120
and may be the same or different than the fuel utilized to form the combustion gas stream. According 6
to applicant, the carbon black containing effluent flows from the reactor into a “lined wall” heat
exchanger where the effluent is cooled to stop pyrolysis and to permit handling of the effluent by
downstream equipment. A line wall heat exchanger is apparently a heat exchanger with an internal7
lining of a material which is both highly conductive and highly heat resistant (i.e., will withstand
3200°F). Applicant defines the phrase in the specification as follows:8
The lined wall heat exchanger utilized in the process of the
present invention has internal walls made from a highly conducting
material that enables heat transfer to be carried out at wall temperatures
up to 3200 F. These internal walls contact the hot effluent. The linedo
wall heat exchanger may dissipate the heat of the effluent into the
atmosphere or may be utilized to transfer the heat to another fluid
stream. Suitable highly conducting materials for the manufacture of the
internal heat transfer surfaces of composite wall heat exchanger include
materials that are able to withstand temperatures up to 3200 F without o
deteriorating and are sufficiently thermally conductive to lower the
temperature of the effluent to a temperature wherein pyrolysis is
stopped and to permit handling of the effluent by the downstream
equipment. Suitable materials include, but are not limited to, silicon
carbide and silicon nitride. I have discovered that these materials will
provide the suitable heat transfer, and resist degradation, even if
cracked. The particular design of the lined wall heat exchanger is within
6 Specification page 2, lines 8-9.
7 Specification page 5, lines 7-10.
8 Specification page 5, line 17.
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