Gas-liquid distributor for fluidized bed reactor

Abstract

The invention provides a gas-liquid distributor for a three-phase fluidized bed reactor. The gas-liquid distributor is mainly composed of a central pipe, a bell cap, connection legs and a distribution plate, wherein the central pipe is divided into upper and lower sections; a material inlet of the central pipe is formed in the end part of the lower section and a material outlet of the central pipe is formed in the end part of the upper section; a pipe wall which is close to the material inlet is provided with a vertical seam which is communicated with the material inlet; a pore plate mixer is arranged on the lower section of the central pipe; three vertical strip-shaped holes are formed in the upper section of the central pipe; the three connection legs which are arrayed vertically are arranged along the peripheral direction of the inner wall of the bell cap; each connection leg comprises a long arm and a short arm and forms an angle rule shape; the short arms of the connection legs are embedded in the vertical strip-shaped holes and can move up and down along the vertical strip-shaped holes; the bell cap is connected with the upper section of the central pipe by the three connection legs and covers the material outlet; the periphery of the bottom of the bell cap can be fitted with the distribution plate. According to the gas-liquid distributor for the three-phase fluidized bed reactor, gas can be crushed into continuous micro air bubbles in liquid and is uniformly distributed; the problem of reverse flowing and blocking of materials can be effectively solved or relieved.

Description

technical field [0001] The invention relates to the field of reactor internals, in particular to a gas-liquid distributor for a three-phase ebullated bed reactor. Background technique [0002] The gas-liquid-solid three-phase ebullating bed reactor has been widely used in the industrial reaction process. For the reaction process with a large reaction heat, the use of the three-phase ebullating bed reactor can effectively remove the reaction heat and realize the isothermal operation of the reactor. To ensure the normal operation of the reactor. In the three-phase ebullating bed reactor, the gas-liquid distributor is an important internal component to ensure the uniform distribution of gas in the bed, which directly affects the smooth operation and reaction efficiency of the reactor. [0003] At present, the fluidized bed gas-liquid distributors in domestic and foreign published patents can be divided into two categories according to their functional characteristics: shut-off...

AI Technical Summary

Problems solved by technology

This kind of gas-liquid distributor mainly has the following problems in the use process: (1) Although the gas-liquid mixing structure can play a certain role in gas-liquid mixing, the gas-liquid is prone to stoppage flow and pulsating flow

(3) Since the blister is cylindrical, and its upper part is connected with the center rod by a nut, the entire blister can only be fixed, and the area of ​​the blister is larger than the area of ​​the opening of the distribution plate, so the material in the There is also a greater potential for solid particles to deposit on the blister, which can also cause coking

Problems in the use of the gas-liquid distributor: (1) Lack of gas-liquid mixing structure, the flow under the distribution plate enters the bed when the bubble cap floats, the bubbles are large, and the impact range of the bubble wake is large, which directly leads to The bottom of the bed fluctuates greatly and the distribution is uneven; (2) The blister is connected to the distribution plate through the square leg, which can move up and down freely. At the same time, there is rotation during the operation. The upper deposition has a certain effect, but the long-term rotation will easily cause the wear of the square legs and the opening of the distribution plate, and the reliability will be reduced. The significance and benefits of long-term safe operation of petrochemical equipment are greater, so the bubble cap should not be rotated freely.

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