Method and device for continuously separating catalyst of synthetic fluid fuel in slurry bed from product

Abstract

The invention relates to a method for continuously separating a catalyst of a synthetic fluid in a slurry bed from a product. The method comprises the following steps of: feeding a synthesis gas into a slurry bed reactor for carrying out catalytic synthesis reaction, leading obtained slurry to be subjected to the primary seperation of a 4000-6000 r / min high-speed centrifugal machine, and obtaining a light liquid component and a heavy liquid component, wherein the heavy liquid component is concentrated oil slurry being rich in more than 75% of catalyst, and the concentrated oil slurry is pressurized by using a centrifugal pump and returned to a reaction region of the slurry bed reactor to participate in reaction; heating the light liquid component to reach the temperature of 240-350 DEG C, leading the viscosity of light liquid to be less than 1mPa.S, leading the light liquid to enter into a multilayer metal sintering screen filter with the particle sizes of filtering meshes in the range of 0.5-20mum to be subjected to secondary seperation, and after seperation, treating filtrate containing the catalyst of less than 65.80mug.g as the product to be fed into a fraction seperation workshop section for deep processing; and carrying out back flushing on the sintering screen filter by using back flushing air when carrying out secondary seperation for 20-60 minutes by using the sintering screen filter so that the sintering screen filter is regenerated, and treating filter residues formed after back flushing as the waste catalyst to be processed. The method has the advantage that the catalyst of the synthetic fluid fuel in the slurry bed can be effectively and continuously separated from the product.

Description

technical field [0001] The invention belongs to a catalyst and product continuous separation method and equipment, in particular to a slurry bed synthetic liquid fuel catalyst and product continuous separation method and equipment. Background technique [0002] Due to the shortage of petroleum resources and the prominent contradiction between supply and demand of liquid fuel, this process is also of great significance to ensure the sustainable development of the national economy, social stability and petroleum security. There are two technical routes for coal-to-liquids: one is coal hydrogenation and direct liquefaction of synthetic oil products, which has high requirements on coal quality; the other is coal gasification into synthesis gas, and then indirect liquefaction of synthetic oil products under the action of catalysts , the method is applicable to a wide range of coal types. The two technical routes are different, the applicable coal types are different, each has it...

AI Technical Summary

Problems solved by technology

The membrane separation process is simple, but the separation accuracy is related to the content of solid catalyst. In the case of the same processing capacity, the higher the catalyst content, the larger the membrane separation area and the higher the equipment investment.

The magnetic separation method is highly targeted and can only be applied to iron-based catalysts, so its general use is limited

Although the combined method of cyclone-sedimentation system-membrane separation system reduces the solid content through the cyclone-sedimentation system, it can appropriately reduce the area of ​​the separation membrane and reduce equipment investment, but it has strict requirements on the limit of the catalyst content. restricted

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