Method for producing acetylenes and syngas

Abstract

The invention relates to a continuous method for producing acetylenes and syngas by partially oxidizing hydrocarbons with oxygen. A first feed stream () containing one or more hydrocarbons and a second feed stream () containing oxygen are —mixed in a ratio of the mass flows of the second feed stream () to the first feed stream () corresponding to an oxygen number of less than or equal to 0.31, said streams being heated separately from each other, —and fed to a combustion chamber (FR) via a burner block (BR), the partial oxidation of the hydrocarbons being carried out in said combustion chamber, —thereby obtaining a first cracked gas stream I. The invention is characterized in that —the first cracked gas stream Iis precooled to a temperature ranging from 100 to 1000° C. in a prequench region (H), thereby obtaining a second cracked gas stream II, —50 to 90% of the solids contained in the second cracked gas stream IIare separated therefrom in a solid-gas separating device (A), thereby obtaining a solid stream Iand a third cracked gas stream III, —the third cracked gas stream IIIis cooled to 80 to 90° C. by injecting water in a total quench region (B), thereby obtaining a fourth cracked gas stream IVand a first process water stream I, —the fourth cracked gas stream IVundergoes a fine separation of solids in one or more scrubbing devices (C, D), thereby obtaining one or more process water streams II, IIIand a product gas stream VI, —the process water streams I, II, IIIare merged into a combined process water stream IV, —the combined process water stream IVis partly recirculated, as stream V, into the total quench region (B) and otherwise undergoes a cleaning process, as stream VI, by means of a partial evaporation process, thereby obtaining a cleaned process water stream VII, —which is cooled by a recooling device (F), partially recycled, as stream VIII, into the method, and otherwise discharged, as stream IX.