Process for cooling crude coke oven gas
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United States of America Patent
Stats
-
Dec 27, 1988
Grant Date -
N/A
app pub date -
Apr 29, 1987
filing date -
May 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention concerns a process for cooling the crude coke oven gas drawn from a gas collecting main at a gas temperature of below 20.degree. C. after separating a collecting main flushing liquid fed to a tar separator. To prevent deposists of naphthalene on the cooling tubes of a precooler, the invention provides that the crude coke oven gas is treated before the precooler with tar or a tar-water mixture withdrawn from the tar separator. This effects a partial evaporation of the more volatile components, and the remaining tar or tar-water mixture is again withdrawn before the precooler. A flushing liquid from the edge zone of the tar separator that has definite proportions of low-solids and lighter tar is used in particular and it is fed in parallel with the cooling crude gas in the precooler.
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