An overflow device and fluidization equipment with the device

Abstract

The invention discloses a vertical overflow device for fluidization equipment. The overflow device is a hollow tubular body with an elongated shape; the hollow tubular body is provided with an upper inlet and a lower outlet; and for a section above the lower outlet of the overflow device, internal cross section of the overflow device is larger than that of the upper inlet and that of the lower outlet, so that the section forms an internal cross section enlargement section. The invention also discloses fluidization equipment with the overflow device. The invention solves the problems of a fluidization dead zone caused by large diameter of an overflow pipe, and shutdown of the overflow pipe caused by material seal fluctuation generated by bubble fluctuation at an overflow outlet. The invention also provides a solution scheme for the condition of overflow pipe shutdown.

Description

technical field [0001] The invention relates to an overflow device, in particular to an overflow device for a fluidized bed. The invention also relates to fluidized equipment, such as a multi-stage fluidized bed, provided with said overflow device. Background technique [0002] The multi-stage fluidized bed is to install horizontal distribution plates and overflow pipes inside the fluidized bed, and to establish multiple dense phase areas of material particles along the axial direction of the fluidized bed to form multiple independent fluidized beds connected in series. The multi-stage fluidized bed facilitates the establishment of concentration and temperature gradients, improves the driving force for gas phase conversion, and facilitates the control of the processing characteristics of solid material particles according to different concentration and temperature characteristics. The solid material particles in the fluidized bed flow from the upper fluidized bed to the nex...

AI Technical Summary

Problems solved by technology

However, the commonly used overflow pipe is a straight pipe type at present, but this kind of overflow pipe is prone to instability of the "material seal" in the overflow pipe due to the pressure fluctuation at the lower end. When the material seal is momentarily lower than the critical material seal, it is easy to cause "Throttling" so that the overflow pipe forms a "bolt" and cannot work normally

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