Improved method and improved equipment for dense phase fluidized bed and equipment

Abstract

The invention relates to an improved method for a dense phase fluidized bed, belonging to the technical field of fluidization and petrochemical engineering and used for solving the problems of non-uniform gas distribution of the dense phase fluidized bed, relatively large fluctuation of the fluidized bed due to bubbles, low mass and heat transfer efficiency and relatively high catalyst loss. The improved method comprises the fluidized bed, gas distribution and powder catalyst recycling. The improved method is characterized in that gratings are respectively arranged above a distributor, below and above a wing valve or back taper, and below a charge level, thus the beneficial effects of guiding and re-distributing gas, crushing bubbles to reduce diameter, improving the work environment of the wing valve or back taper, improving the mass and heat transfer efficiency of the fluidized bed, reducing the elutriation of the fluidized bed, improving the gas utilization rate, improving the elasticity of a device, improving the efficiency of the fluidized bed, and reducing the catalyst are achieved. The invention further provides gas re-distributing grating and bubble crushing grating equipment for realizing the improved method disclosed by the invention. The gas re-distributing grating and bubble crushing grating equipment is used in a regenerator and a reactor of devices for catalytic cracking, methanol-to-olefin production and inferior residue oil treatment.

Description

technical field [0001] The invention belongs to the technical fields of fluidization and petrochemical industry, and in particular relates to a method and equipment for improving a dense-phase fluidized bed. Background technique [0002] Dense-phase fluidized beds have been widely used in industry since the 1940s. Since the 1960s, dense-phase fluidized beds have also been widely used in domestic oil refining and catalytic cracking. Today dense phase fluidized bed is still the most important method and technology in industry, especially in the field of catalytic cracking. Early dense-phase fluidized beds in the field of catalytic cracking were relatively simple, generally including equipment cylinders, gas distributors, cyclone separators, material legs, wing valves or inverted cones, and their tasks were relatively simple. They were used in the processing of wax oil, The requirements for mass transfer, heat transfer and fluidized bed stability are not high. However, the t...

AI Technical Summary

Problems solved by technology

However, a complete system has not been formed, and the design has not been analyzed and improved in terms of gas redistribution, improvement of wing valve or inverted cone working environment, improvement of mass transfer and heat transfer efficiency of fluidized bed, reduction of fluidized bed elutriation, etc.

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