| 摘要 |
An apparatus for the vaporization of a heavy hydrocarbon feedstock with steam having first and second tubes arranged coaxially to form an annular space, an inlet for introducing a heavy hydrocarbon feedstock within the first tube and a second inlet for introducing superheated steam into the annular space. The first and second tubes terminate in open ends for the supplying of the superheated steam as annulus around a core of the heavy hydrocarbon feedstock. A frustoconically shaped element having an apex angle of less than 20 degrees is connected to the open end of the second tube.
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