Apparatus for direct liquefaction
AssigneeThe President of Yamagata University
InventorsMinoru Morita, Shimio Sato, Takao Hashimoto, Yoji Kitaoka
Life of this patent
Estimating the term…
Abstract
In a process for directly liquefying coal, a paste consisting of finely divided coal, catalyst and heavy oil can be treated for thermal cracking and hydrocracking with a high liquid/space ratio and short residence time in a preheating section and a reaction section. An apparatus threfor comprises a plural number of pipe units having apertures for hydrogen injection and apertures for the paste of a low concentration or heavy oil injection and a gas-liquid separator for removing H.sub.2 O, methane, etc., the pipe units being formed in such a manner that a Reynolds number of 3.times.10.sup.3 or greater and an axial dispersion coefficient of 0.05 or smaller are achieved for the fluid flow therein.
Claims6
An apparatus adapted for direct liquefaction of coal, comprising a preheating section including a plural number of first pipe units, each first pipe unit being formed with a pressure resistant vertical gas-liquid ascendant pipe and a pressure resistant vertical gas-liquid descendant pipe and said first pipe units forming through respective pipe walls at several locations in both ascendant and descendant pipes thereof apertures for a hydrogen injection;
- a reaction section including a plural number of second pipe units, each second pipe unit being formed with a pressure resistant vertical gas-liquid ascendant pipe, a pressure resistant vertical gas-liquid descendant pipe and a high pressure gas/liquid separator disposed between said ascendant and descendant pipes, and said second pipe units forming through respective pipe walls at several locations in both ascendant and descendant pipes thereof apertures for a hydrogen injection and apertures for a paste of a low concentration or heavy oil injection, a high pressure separator, a first condensor for crude oils of low boiling points and a second condensor for crude oils of high boiling points, each of said first and second pipe units being formed in such a manner that a Reynolds number of 3.times.10.sup.3 or greater and an axial dispersion coefficient (D/uL) of 0.05 or smaller are achieved for the fluid flows therein;
- and the pipe diameter ratio of a descendant pipe to an ascendant pipe is from 0.5 to 0.85.
Dependencies are inferred from the claim text.