skip to main content

Title: Convective heater

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.
Authors:
 [1]
  1. (Macungie, PA)
Publication Date:
OSTI Identifier:
865788
Report Number(s):
US 4576121
DOE Contract Number:
AC05-78OR03054
Resource Type:
Patent
Research Org:
INTERNATIONAL COAL REFINING CO
Country of Publication:
United States
Language:
English
Subject:
convective; heater; convective; heater; heating; fluids; coal; slurry; constructed; tube; circuit; arrangement; obtains; optimum; temperature; distribution; relatively; constant; slurry; film; temperature; heater; constructed; divide; heating; gas; flow; equal; paths; tube; circuit; slurry; arranged; provide; mixed; flow; configuration; whereby; slurry; passes; heating; gas; paths; successive; co-current; counter-current; co-current; flow; relative; heating; gas; flow; arrangement; permits; utilization; minimum; surface; maximum; film; temperature; slurry; consistent; prevention; coke; formation; optimum temperature; film temperature; film temperature; convective heat; convective heat; relatively constant; gas flow; gas flow; current flow; coal slurry; heating gas; heating gas; heating gas; temperature distribution; circuit arrangement; co-current flow; coke formation; tube circuit; tube circuit; convective heater; convective heater; gas path; arrangement permits; flow configuration; slurry film; heating fluids; heating fluid; constant slurry /122/165/