Method of preheating hydrocarbons for thermal cracking
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United States of America Patent
Stats
-
Nov 30, 1982
Grant Date -
N/A
app pub date -
Dec 13, 1979
filing date -
Dec 14, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cracking furnace has a radiant heating zone provided with fuel-fired burners and through which a preheated feedstock is passed, combustion gases from the radiant heating zone passing into a convection zone before being discharged from said furnace. The convection zone is provided with heat-exchanger means for preheating said feedstock. The heat-exchanger means in the convection zone is subdivided into a plurality of functionally separated heat-exchanger bundles and the feedstock is passed selectively through the bundles in accordance with the composition of the feedstock.
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