Apparatus and process for three-phase reaction

摘要

A system and process for removing catalyst fines from a gas stream overhead the slurry in a Fischer-Tropsch slurry bubble column reactor. The gas phase at the top of the slurry bubble column reactor containing small amounts of entrained liquid and catalyst particles. The unreacted gases are passed through a demister, which removes larger droplets and catalyst particles. Smaller droplets and catalyst fines are conveyed to a secondary gas cleaner, such as a cyclone, whereby substantially all remaining particles are removed from the gas phase. A particle-containing liquid produced in the secondary gas cleaner can be further subjected to a filtrate cleaning unit to filter out fine catalyst particles and produce a substantially particle-free liquid product stream and a slurry stream of liquid product containing catalyst particles.

主权项

1. An apparatus for conducting a three-phase reaction, in which gaseous reactants are reacted in the presence of a finely divided solid catalyst in suspension in a liquid comprising, at least in part, one or more reaction products of the gaseous reactants, thereby forming a slurry, the apparatus comprising:
a reactor vessel having a reactant inlet and configured to accommodate the slurry and a gas space above the slurry during normal operational use; a filtration system having a primary filter configured to be in fluid communication with the slurry during normal operational use, and wherein the primary filter has an outlet for primary filtrate that has been subjected to primary filtration by the primary filter; a gas demister configured to remove a source of entrained material from a gas source from the gas space above the slurry and produce a demister gas stream; and a secondary gas cleaner in fluid communication with the gas demister and configured to receive the demisted gas stream, whereby the secondary gas cleaner is capable of further removal of a source of relatively finer entrained material from the demisted gas stream, wherein a cross-sectional area of the demister is smaller than a cross-sectional area of the reactor above the slurry level, whereby a velocity of the gas source is increased as it passes through the demister during normal operational use.