A fluidized bed reactor

Abstract

The invention relates to a fluidized bed reactor. The fluidized bed reactor comprises a casing, a three-phase separation component, an inner tube and a gas-liquid distributor, wherein the casing successively comprises an expanding section, a transition section and a straight-drum section from top to bottom, the diameter of the expanding section is larger than that of the straight-drum section, the three-phase separation component is arranged in the expanding section and the transition section, the inner tube is arranged in the straight-drum section, and the gas-liquid distributor is arranged at the bottom of the inner tube; the three-phase separation component comprises a cone-shaped baffle which is formed in the circumferential direction, and a hollow revolving body arranged above the cone-shaped baffle, a through hole is formed in the cone-shaped baffle, the minimum distance from the through hole to the longitudinal central axis of the casing is larger than the minimum distance from the inner side of the hollow revolving body to the longitudinal central axis of the casing, the upper part of the hollow revolving body is in an inverted-frustum shape, and the lower part of the hollow revolving body is in a frustum shape. The fluidized bed reactor provided by the invention can obtain a better reacting effect.

Description

technical field [0001] The invention relates to an ebullating bed reactor, in particular to a gas-liquid-solid three-phase internal circulation ebullating bed reactor. Background technique [0002] The ebullating bed hydrogenation reactor is a gas-liquid-solid three-phase fluidized bed reactor. This type of reactor has the following advantages: it can process heavy and inferior raw materials with high metal content and high carbon residue value; the temperature of the reactor is easy to control and uniform, The pressure is low and constant; the catalyst can be added and taken out online, so the catalyst performance can be kept constant throughout the operation cycle; a higher conversion rate and a longer operation cycle can be achieved. [0003] Existing industrial ebullated bed hydrogenation technologies include H-oil process and LC-Fining process. The typical ebullating bed process is as follows: After the oil and gas are mixed, they enter the reactor from the lower part ...

AI Technical Summary

Problems solved by technology

The existing fluidized bed hydrogenation process has the following disadvantages: (1) The boiling material level of the catalyst is 30-50% higher than the static material level, and there needs to be a certain space between the boiling material level and the three-phase separator, so The amount of catalyst stored in the reactor is low, and the space utilization rate of the reactor is low; (2) The efficiency of the three-phase separator for separating solids is low, and a complicated material level monitor is required to monitor the catalyst material level; (3) The energy consumption is large, and the solids The fluidization of the catalyst is achieved by injecting a large amount of circulating oil into the circulating oil pump; (4) There is very little hydrogen in the circulating downcomer, which is a non-hydrogen environment, and the liquid will undergo secondary cracking reaction coking at high temperature and reduce product quality

[0006] CN201529519U discloses a kind of ebullating bed reactor of outer circulation type, and catalyzer can fluidize better, but there is almost no hydrogen to exist in the circulation downcomer of this reactor, and liquid can take place secondary cracking reaction coking at high temperature and reduce Product quality, at the same time, the structure of the outer loop reactor will have higher requirements on materials in actual production

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