Gas-solid fluidized-bed catalyst mixing apparatus

Abstract

The invention provides a gas-solid fluidized-bed catalyst mixing apparatus, comprising a fluidized-bed reactor, a mixing chamber, a gas distributor and at least two catalyst ducts; the gas distributorand all the catalyst ducts are communicated with the mixing chamber for mixing catalyst in the catalyst ducts in the mixing chamber; the mixing chamber is communicated with the fluidized-bed reactorfor mixing the catalysts, mixed in the mixing chamber, with a catalyst in the fluidized-bed reactor. The gas-solid fluidized-bed catalyst mixing apparatus has the advantages that at least two catalysts are fed into the mixing chamber through the different catalyst ducts, the catalysts are mixed first in the mixing chamber, the premixed catalysts in the mixing chamber are mixed with the catalyst inthe fluidized-bed reactor. Mixing catalysts in the fluidized-bed reactor is facilitated such that the catalysts in the fluidized-bed reactor can be mixed well.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a gas-solid fluidized bed catalyst mixing device. Background technique [0002] In petrochemical, pharmaceutical and chemical industries, solid particles often need to react with gases to produce different products. Usually, a fluidized bed reactor is used as the main reaction site. Among them, the fluidized bed reactor is a reactor that uses gas or liquid to pass through the granular solid layer to make the solid particles in a state of suspension and motion, and to perform a gas-solid phase reaction process or a liquid-solid phase reaction process. [0003] For some processes, it is necessary to uniformly mix different catalysts (gas), or to mix catalysts with different temperatures or activities, and then react with the gas phase, such as catalytic cracking MIP process technology (MIP: maximizing iso-paraffins), which requires Mix catalysts with different temperatu...

AI Technical Summary

Problems solved by technology

[0004] However, the mixing effect of the catalyst has a significant impact on the size of the reaction yield, the selectivity of the product and the energy consumption of the reaction device.

With the gradual increase in the processing capacity of chemical plants in recent years, the equipment size has also increased accordingly. It is very difficult to directly mix two or three catalysts evenly in large equipment with a diameter of several meters or even tens of meters.

Images