| 摘要 |
<p>A process for the thermal decoking of cracked gas coolers for the indirect cooling, by means of water, of ethylene-containing cracked gases which are obtained by thermal cracking of hydrocarbons in the presence of steam in an indirectly heated tube cracking furnace, at cracked gas exit temperatures of above 750.degree.C, in which air or an air/ oxygen mixture in heated in the tube cracking furnace to temperatures of from 600 to 1.100.degree.C and the heated air or air/oxygen mixture is passed through the cracked gas cooler tubes which are to be decoked and at the same time a steam pressure of 90 to 150 bar is maintained on the boiling water side of the cracked gas cooler.</p> |
