Device for inhibiting fluidizing gas short circuit of bubbling bed-transport bed stacked reactor

Abstract

The invention relates to a device for inhibiting fluidizing gas short circuit of a bubbling bed-transport bed stacked reactor, which comprises a bubbling bed, a central air pipe and a lifting pipe are coaxially arranged in the bubbling bed, the outlet of the central air pipe penetrates through an air distribution plate and extends into the bubbling bed, the inlet of the lifting pipe and the outlet of the central air pipe are arranged at an interval up and down, and the inlet of the lifting pipe is communicated with the air distribution plate. The inner diameter of the lifting pipe is larger than that of the central air pipe, a sleeve is arranged on the outer side of the lifting pipe and the central air pipe in the bubbling bed and is coaxial with the lifting pipe and the central air pipe, the bottom of the sleeve is connected with the air distribution plate, the top of the sleeve is in an open state, and a cavity is formed between the inner wall of the sleeve and the outer wall of the lifting pipe. The cavity is used for forming an accumulated material layer in the fluidization process, and the material layer has a certain height and can provide enough resistance to prevent short-circuit gas in fluidization gas from penetrating through the material layer to enter the lifting pipe after overcoming the resistance under the condition that the central air pipe is closed. According to the invention, the short circuit of the fluidizing gas is effectively inhibited.

Description

technical field [0001] The invention relates to the technical field of fluidized beds, in particular to a device for suppressing short circuit of fluidized gas in a bubbling bed-transport bed stacked reactor. Background technique [0002] Gas-solid fluidized bed reactors are widely used in petroleum, chemical, energy, metallurgy and other industries due to their advantages of sufficient gas-solid contact and high heat and mass transfer efficiency. Commonly used fluidized bed forms include fast fluidized beds and bubbling fluidized beds. The fast fluidized bed operates at high gas velocity, which can effectively control the residence time of materials and facilitate large-scale industrialization. However, this reactor has the disadvantages of short gas residence time and insufficient reaction. The bubbling fluidized bed operates at a low gas velocity, the gas-solid contact time is long, and the reaction is relatively sufficient. However, the reactor can only rely on partic...

AI Technical Summary

Problems solved by technology

[0005]Aiming at the deficiencies of the prior art, the present invention provides a device for suppressing the short circuit of the fluidization gas in the bubbling bed-transport bed stacked reactor. The technical problem of carrying material to escape directly from the riser after the gas is short-circuited

Images