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Title: Convective heater

Abstract

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. 14 figs.

Inventors:
Issue Date:
Research Org.:
International Coal Refining Co
OSTI Identifier:
7013504
Patent Number(s):
4422411 A
Application Number:
PPN: US 6-268450
Assignee:
International Coal Refining Co., Allentown, PA (United States)
DOE Contract Number:  
AC05-78OR03054
Resource Type:
Patent
Resource Relation:
Patent File Date: 29 May 1981
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; FUEL SLURRIES; HEATING; HEATERS; DESIGN; OPERATION; COAL; COKE; CONVECTION; COUNTERFLOW SYSTEMS; DEPOSITION; MITIGATION; CARBONACEOUS MATERIALS; DISPERSIONS; ENERGY SOURCES; ENERGY TRANSFER; FOSSIL FUELS; FUELS; HEAT TRANSFER; MASS TRANSFER; MATERIALS; MIXTURES; SLURRIES; SUSPENSIONS; 014000* - Coal, Lignite, & Peat- Combustion

Citation Formats

Thorogood, R M. Convective heater. United States: N. p., 1983. Web.
Thorogood, R M. Convective heater. United States.
Thorogood, R M. Tue . "Convective heater". United States.
@article{osti_7013504,
title = {Convective heater},
author = {Thorogood, R M},
abstractNote = {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. 14 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {12}
}