Slurry ¿Cbed reaction unit and method of use thereof

Abstract

A slurry bed reaction equipment and method of using the same is provided, wherein the equipment comprises an ascending tube reactor 1 and a settling tube 4; the lower part of the ascending tube reactor 1 is a reacting region 14, while the upper part of the ascending tube reactor is a settling region 2 with tube diameter enlarged; the top of the settling region 2 is provided with an exhaust port 6; the bottom of the ascending tube is provided with a feed port 3 and a gas distributor 5; a pipeline 7 is used for connecting the settling region 2 with the settling tube 4, of which the opening position is arranged at the inside of the settling tube 4; the lower part of the settling tube 4 is a magnetic separation region 15, of which the lower end is communicated with the lower end of the ascending tube reactor 1 through a conical spout 10 and a reflux pipe 11; the upper part of the settling tube 4 is provided with a liquid discharging hole 13. The space utilization ratio of the reactor is improved by adopting the equipment and the separation method of the present invention; meanwhile, the separation technology combining settling, magnetic separation and filtering are adopted, making the separation part small in equipment volume, high in efficiency and space saving.

Description

technical field [0001] The invention relates to a device and a method for separating solid particles from liquid, more specifically, to a device for continuous separation of liquid and solid particles in a slurry bed reaction system and its application method. Background technique [0002] Fischer-Tropsch synthesis is an important method for converting synthesis gas into liquid hydrocarbons through catalyst action. In recent years, with the increasing shortage of petroleum resources, natural gas resources and coal resources have become important options to replace petroleum, so Fischer-Tropsch synthesis technology shows good application prospects. The types of Fischer-Tropsch synthesis reactors mainly include: fixed bed reactors, fluidized bed reactors and slurry bed reactors. Among them, the slurry bed reactor has a simple structure, is easy to transfer heat, and can synthesize high-quality paraffin at a relatively low temperature. The synthesized paraffin products are wid...

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Problems solved by technology

[0007] Using a single settling technology to achieve a relatively complete solid-liquid separation, to obtain a liquid product with a very small solid content requires a large volume of the settling device to ensure sufficient settling time, which results in most of the area and space of the equipment being occupied by the settling device occupancy, low production efficiency

In addition, catalysts with smaller particle sizes are more conducive to Fischer-Tropsch synthesis, and at the same time, catalyst wear during the reaction will produce solid powders with extremely small particle sizes, but for catalyst particles with a particle size of a few microns or smaller, sedimentation Technology does not separate well

[0008] CN 1433838A discloses a method and equipment for separating liquid synthetic oil and solid catalyst in a slurry bed reactor. In this method, the oil slurry containing catalyst particles is introduced into a group of separation units. Strengthen the magnetic field to accelerate the solid-liquid separation speed, but the separation equipment applied for is located in the main body of the reactor. Since the diameter of the Fischer-Tropsch synthesis reactor is often more than 5 meters, it is difficult to generate a uniform magnetic field in the reactor, and the equipment is heavy and expensive. At the same time, it is impossible to demagnetize the magnetized catalyst, resulting in the agglomeration of the magnetized catalyst, which makes the reactor unable to operate normally; in addition, the patent does not propose an effective separation method for the separation of non-magnetic powders with extremely small particle sizes produced by catalyst wear method

[0009] WO 94 / 16807 discloses a method for filtering slurry in a reactor to achieve solid-liquid separation, but once the catalyst particles block the filter assembly, the regeneration of the filter assembly is difficult, which is not conducive to large-scale continuous production

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