Convective heater

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865788

Thorogood, Robert M ^[1]

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1. Macungie, PA

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

• Research Organization: INTERNATIONAL COAL REFINING CO
• DOE Contract Number: AC05-78OR03054
• Assignee: International Coal Refining Company (Allentown, PA) [*] Notice: portion of term of this patent subsequent to December 27, 2000 has been disclaimed.
• Patent Number(s): US 4576121
• OSTI ID: 865788
• Country of Publication: United States
• Language: English

Related Subjects

convective
heater
heating
fluids
coal
slurry
constructed
tube
circuit
arrangement
obtains
optimum
temperature
distribution
relatively
constant
film
divide
gas
flow
equal
paths
arranged
provide
mixed
configuration
whereby
passes
successive
co-current
counter-current
relative
permits
utilization
minimum
surface
maximum
consistent
prevention
coke
formation
optimum temperature
film temperature
convective heat
relatively constant
gas flow
current flow
coal slurry
heating gas
temperature distribution
circuit arrangement
co-current flow
coke formation
tube circuit
convective heater
gas path
arrangement permits
flow configuration
slurry film
heating fluids
heating fluid
constant slurry
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