A kind of separation method of slurry bed Fischer-Tropsch synthesis heavy product and catalyst

Abstract

A separation method for a slurry bed fischer-tropsch synthesis heavy product and a catalyst is characterized in that the fischer-tropsch synthesis heavy product from a slurry bed reactor and the magnetic fischer-tropsch synthesis catalyst, after degassing, enter the lower part of a separator, the catalyst and the fischer-tropsch synthesis heavy product are preliminarily separated by gravity settling to obtain concentrated slurry rich in the catalyst in the lower part of the separator, the concentrated slurry is cycled to the slurry bed reactor, and obtained diluted slurry enters into a magnetic separator zone on the upper part of the separator; in the magnetic separator zone, the catalyst is adsorbed by magnetic force in a magnetic field zone, when the amount of the catalyst adsorbed in the magnetic field zone reaches a set amount, the magnetic field is removed, the catalyst sinks by gravity to a flow guide pipe, flows to the bottom of the separator along the flow guide pipe, and is is cycled to the slurry bed reactor; after the magnetic separation, the catalyst is further separated from the fischer-tropsch synthesis heavy product containing less catalyst by a filter element, and is discharged out of the separator, and the filtered catalyst is cycled to the slurry bed reactor.

Description

technical field [0001] The invention relates to a method for separating a catalyst for preparing hydrocarbons from synthesis gas and a heavy product, in particular to a method for separating a heavy product and a catalyst for a slurry bed Fischer-Tropsch synthesis. Background technique [0002] With the changes in the world's energy structure and the increasing global environmental protection requirements, the method of preparing synthetic oil through Fischer-Tropsch synthesis using natural gas and coal-based syngas as raw materials has the advantages of clean products, no sulfur, nitrogen, and aromatic hydrocarbons, etc. In recent years, it has attracted the attention of countries all over the world. [0003] The core of Fischer-Tropsch synthesis technology is catalyst and reactor technology. Currently, Fischer-Tropsch synthesis catalysts mainly include cobalt catalysts and iron catalysts. In terms of reactors, the Fischer-Tropsch synthesis slurry bed reactor has the char...

AI Technical Summary

Problems solved by technology

When the sedimentation method is used alone for separation, because the fine particle catalyst is not easy to settle, the catalyst is carried over too much

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