Method for producing hydrocarbon oil and system for producing hydrocarbon oil

Abstract

Hydrocarbon oil obtained by Fischer-Tropsch (FT) synthesis reaction using a catalyst within a slurry bed reactor is fractionated into a distilled oil and a column bottom oil in a rectifying column, part of the column bottom oil is flowed into a first transfer line that connects a column bottom of the rectifying column to a hydrocracker, at least part of the column bottom oil is flowed into a second transfer line branched from the first transfer line and connected to the first transfer line downstream of the branching point, the amount of the catalyst fine powder to be captured is monitored while the catalyst fine powder in the column bottom oil that flows in the second transfer line are captured by a detachable filter provided in the second transfer line, and the column bottom oil is hydrocracked within the hydrocracker.

1 - 2 . (canceled) 
     
     
         3 . A system for producing a hydrocarbon oil, comprising:
 a rectifying column for fractionating a hydrocarbon oil obtained by a Fischer-Tropsch synthesis reaction using a slurry bed reactor, in which a catalyst is suspended in a liquid hydrocarbon, into at least one distilled oil and a column bottom oil;   a hydrocracker for hydrocracking the column bottom oil;   a first transfer line connecting a column bottom of the rectifying column to the hydrocracker; and   a second transfer line branched from a branching point of the first transfer line, provided with a detachable filter for capturing a catalyst fine powder derived from the catalyst, and connected to the first transfer line downstream of the branching point,   wherein the first transfer line does not have a filter between the branching point and the point where the second transfer line is connected to the first transfer line downstream of the branching point.   
     
     
         4 . The system for producing a hydrocarbon oil according to  claim 3 , wherein the first transfer line and the second transfer line comprise a flow meter. 
     
     
         5 . The system for producing a hydrocarbon oil according to  claim 3 , wherein the second transfer line comprises a device that measures a differential pressure before and after the filter provided in the second transfer line. 
     
     
         6 . The system for producing a hydrocarbon oil according to  claim 4 , wherein the second transfer line comprises a device that measures a differential pressure before and after the filter provided in the second transfer line. 
     
     
         7 . The system for producing a hydrocarbon oil according to  claim 3 , wherein the first transfer line does not contain a filter for monitoring an amount of the catalyst fine powder. 
     
     
         8 . The system for producing a hydrocarbon oil according to  claim 3 , wherein the detachable filter for capturing a catalyst fine powder derived from the catalyst is at a halfway point of the second transfer line.