Middle-air-intake automatic cooling fluidized bed

Abstract

The invention discloses a fluidized bed. The fluidized bed comprises a fluidized bed body, an air distributing plate and a center air intake pipe are arranged in the fluidized bed body, the center airintake pipe is connected to a center air intake opening in the air distributing plate, air outlet holes are formed in each of the upper and lower parts of the center air intake pipe, the center air intake pipe rotates along with the air distributing plate, a layer of water-cooled wall is arranged on the outer surface of the fluidized bed, and upper and lower temperature-measuring probes are arranged in the water-cooled wall. According to the fluidized bed, through the rotation of the air distributing plate, the air intake is more even, meanwhile, the center air intake pipe rotates and spraysthe air simultaneously, the material circulation is promoted, and the reaction rate is increased; and meanwhile, the phenomena of ditches and surges are effectively avoided, so that the fluidized bedoperates more efficiently, the temperature probes monitors the temperature in the fluidized bed in real time, the water is automatically injected into the water-cooled wall when the temperature is toohigh, and the phenomenon of material coking due to the high temperature is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of fluidized beds, in particular to an intermediate air inlet automatic cooling fluidized bed. Background technique [0002] Fluidized bed technology is widely used in chemical production, material drying, fluidized bed boilers and other fields. It has the advantages of good mass and heat transfer characteristics, large processing capacity and continuous operation. However, the common fluidized bed air distribution plate is fixed, the air intake is uneven and there is a dead angle when the air intake occurs, and at the same time, it is easy to generate channel flow for ultra-fine particles and particles with relatively high humidity. When the air bubbles in the bed merge to a size close to the cross-section of the bed, the material layer in the bed may be divided into several sections, forming an air plug and moving like a piston. When the large bubbles burst, the large particles will fall, and the fine mat...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a technical solution, mainly to solve the problems of channeling and surge, uneven distribution of materials, insufficient reaction, and easy coking of high-temperature materials during the operation of the fluidized bed

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