Gas Spargers and Silicone Fluidized Bed Reactors for Silicone Fluidized Beds

Abstract

The invention provides a gas distributor and an organic silicon fluidized bed reactor for an organosilicon fluidized bed. The gas distributor provided by the invention is used in an organic silicon fluidized bed, which is beneficial to eliminate accumulation dead zones in side wall regions At the same time, it can also promote particle shearing and collision, thereby realizing the surface renewal of particles and improving the reactivity in the fluidized bed. The gas distributor for an organosilicon fluidized bed provided by the present invention includes a gas distribution plate and a particle guide device, wherein the gas distribution plate is divided into a central area and a side wall area located on the periphery of the central area, and the central There are a plurality of vertical air holes distributed in the side wall area; the particle flow guiding device is installed in the side wall area, and the particle flow guiding device is used to suck the particles deposited in the side wall area and move them in a horizontal direction or roughly The spray is injected horizontally above the gas distribution plate and at least above the central region.

Description

technical field [0001] The invention relates to a gas distributor, in particular to a gas distributor suitable for a fluidized bed for organic silicon monomer synthesis. Background technique [0002] In a silicone fluidized bed, the gas distributor plays a vital role in the performance of the fluidized bed. At present, the gas distribution plates widely used in the industry can be classified into two categories: one is a simple straight-hole distribution plate; the second is a distribution plate with a hood. Due to the strong heat release of the organosilicon monomer synthesis system, the strong adhesion of the system, the easy agglomeration of the particles, the high boilers and carbon deposits produced by side reactions, and the design defects of the distributor itself, there are the following technical problems during use: [0003] 1. When the straight hole distribution plate is applied to a fluidized bed with a large diameter, due to the uneven distribution of the air f...

AI Technical Summary

Problems solved by technology

[0003] 1. When the straight-hole distribution plate is applied to a fluidized bed with a large diameter, due to the uneven distribution of the air flow, the air inlet near the wall of the fluidized bed has a low gas velocity due to the side wall effect, which is prone to material leakage and the formation of material accumulation dead zone

[0004] 2. The hood distribution plate is equipped with a hood on the vent hole, which can prevent material leakage, but the use of the hood also prevents the gas from flowing out in the vertical upward direction when passing through, which is less effective for the gas-solid mixing and dispersion of the system. Difference

[0005] 3. The gas-solid mixing and dispersing effect of the fluidized bed is uneven, the local gas-solid mixing and dispersing effect is poor, and the heat in the particle agglomeration cannot be removed in time, resulting in an increase in side reactions and a decrease in reaction selectivity

[0006] 4. Copper-rich and carbon deposits accumulate on the surface of silicon powder, resulting in low reactivity, which reduces the conversion rate and increases the unit consumption of silicon powder and catalyst

CN207012953U discloses a kind of organosilicon fluidized bed with pulverizing device, forms high-speed airflow by pulverizing nozzle, implements surface renewal and pulverizing to the material in the bed, can partly solve the low reactivity of fluidized bed in the prior art, gas distributor Situations prone to clogging

However, due to the inability to fundamentally optimize the flow field inside the reactor, it is impossible to essentially solve the fluidization dead zone caused by uneven air distribution, poor local heat dissipation, and the accumulation of copper-rich and carbon deposits on the surface of silicon powder, low reactivity, and methyl chloride. Problems with low conversion rates

Images