Fluidized bed reactor

Abstract

The invention discloses a fluidized bed reactor comprising a reactor shell and a three-phase separator, wherein the three-phase separator is arranged at the upper part inside the reactor shell and is in a sleeve structure including an inner sleeve and an outer sleeve; the upper ends and the lower ends of the inner sleeve and the outer sleeve are in opened structures; the inner sleeve and the outer sleeve both comprise upper segments and lower segments which are connected with each other; the upper segments of the inner sleeve and the outer sleeve are both in reversed frustum-shaped structures, and the lower segments of the inner sleeve and the outer sleeve are both in cylinder-shaped structures; and an opening positioned on the upper end of the outer sleeve is higher than an opening positioned on the upper end of the inner sleeve. The fluidized bed reactor is mainly suitable for chemical reaction carried out under the condition that different liquid and gaseous matters contact with solid particles, has the advantages of large catalyst inventory, high reactor utility ratio, simple structure and easy operation and is suitable for long-periodic stable operation, and the like.

Description

technical field [0001] The invention relates to a gas-liquid-solid three-phase ebullating bed reactor, in particular to an improved three-phase ebullating bed hydrogenation for chemical reaction under the condition that different kinds of liquid and gas substances flow upward and contact with solid particles reactor. Background technique [0002] The heavy oil fluidized bed hydrogenation reactor belongs to the gas, liquid and solid three-phase fluidized bed reactor, which can process heavy and low-quality raw material oil with high metal and high asphaltene content, and has the advantages of small pressure drop, uniform temperature distribution, and can maintain the whole operation The catalyst activity in the periodic reactor is uniform, and fresh catalyst can be added and spent catalyst can be taken out during operation. [0003] US Re 25,770 describes a typical fluidized bed process, which adopts the operation mode of circulating oil pump, but this process method has the...

AI Technical Summary

Problems solved by technology

[0003] US Re 25,770 describes a typical fluidized bed process, which adopts the operation mode of circulating oil pump, but this process method has the following shortcomings in practical application: less catalyst storage in the reactor, low space utilization of the reactor; circulating oil pump maintenance The maintenance cost is high, and once the circulating oil pump is malfunctioning or damaged, it will cause the catalyst to sink and accumulate, resulting in the forced shutdown of the device; It is easy to carry out secondary thermal cracking reaction coking and reduce product quality

The difference in flow rate increases with the diameter of the reactor, which may lead to coalescence of bubbles, formation of large bubbles, insufficient contact between gas and liquid phases, and poor fluidization

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