Patent ID: 8263007

Claim:
A slurry bed loop reactor comprising a riser and at least one downcomer ( 3 ), wherein two ends of the riser are connected to two ends of each downcomer ( 3 ) respectively via line ( 16 ) and line ( 7 ); the riser comprises a reaction section ( 1 ) and a settling section ( 2 ) with an increased tube diameter disposed on the reaction section ( 1 ); a gas outlet ( 13 ) exists at the top of the settling section ( 2 ); each of the downcomers ( 3 ) is divided into a filtrate section ( 5 ) and a slurry section ( 6 ) by a filter medium ( 4 ), wherein the filtrate section ( 5 ) is connected to a liquid outlet ( 10 ), and two ends of the slurry section ( 6 ) are respectively connected to two ends of the riser, wherein the settling section ( 2 ) has a baffle disposed approximately in the vertical direction; wherein the distance between the upper edge of said baffle and the top of the settling section is 1/10- 9/10 of the total height of the settling section; wherein the section above the upper edge of the baffle in the settling section is a gas-liquid separation section, and the section below the upper edge of the settling section is divided into a turbulence section ( 20 ) and a steady flow section ( 19 ) by said baffle; wherein said turbulence section ( 20 ) is adjacent to and directly communicated to the reaction section ( 1 ), and the bottom of said steady flow section ( 19 ) is in liquid communication to the reaction section ( 1 ) via hole(s) ( 18 ) or fluid guide pipe(s) ( 17 ); and wherein the downcomer is connected via line ( 16 ) to the riser at the upper part of the steady flow section, and the position at which the line ( 16 ) is connected to the steady flow section ranges from 1/10 to 9/10 of the vertical distance between the upper edge of said baffle and the position at which hole(s) ( 18 ) or fluid guide pipe(s) ( 17 ) is connected to the baffle.