Jet drive fluidized bed pelletizing device with multiple jet drive units

A spouted fluidized bed and granulation technology, which is applied in the field of spouted fluidized bed granulator and granulation device, can solve the problems of difficulty in continuity, back-mixing of particle granulator, blockage of nozzles, etc., and achieves equipment structure. Simple, reduce the amount of return material, improve the effect of uniformity

Inactive Publication Date: 2003-04-09
TIANJIN UNIV
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Problems solved by technology

The granulator with such a structure has two deficiencies. One is that the phenomenon of back-mixing in the granulator is serious, which leads to the deterioration of the uniformity of the particle size of the product, and the returned material reaches more than 50%. The normal atomization of the nozzle leads to the clogging of the nozzle, which makes it difficult to ensure the continuous production

Method used

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  • Jet drive fluidized bed pelletizing device with multiple jet drive units
  • Jet drive fluidized bed pelletizing device with multiple jet drive units
  • Jet drive fluidized bed pelletizing device with multiple jet drive units

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Embodiment Construction

[0014] The invention is applied to the manufacture of spherical anhydrous calcium chloride, and realizes industrial operation. In this device, each spraying unit is equipped with a φ150×500mm guide tube, the area ratio of the annular area to the spraying area is 3:1, and the opening ratio is 1:3. The angle between the inclined hole and the horizontal in the annular area is 60°. The nozzle used is the self-cleaning two-fluid nozzle of the present invention. The granular calcium chloride produced by applying the present invention has a uniform particle size (3-4mm) and a return rate of less than 30%. The device has been running continuously for more than 72 hours. Check the nozzle, and there is no material hanging at the nozzle of the nozzle. The device has been in operation for nearly a year, and no spouted fluidized bed cannot operate normally due to nozzle blockage.

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Abstract

The present invention discloses one spouted fluidized bed pelletizer with several spouting units. The pelletizer consists of mainly casing, spouted fluidized bed pelletizer with several spouting units comprising vertical partition boards inside the casing. Each spouting unit consists of gas distributing board, self-cleaning pressure jet or self-cleaning double-fluid jet, and guide tube over the jet. The guide tube separates the spouting unit into spouting area and annular area in the area ratio of 0.2-0.5. The ventilating hole in the annular area is inclined hole and that in the spouting area is vertical hole. The present invention has simple structure, less back mixing of the particles and high product homogeneity. The self-cleaning jet without choking and the inclined holes in favor of exhaust of large particles can ensure the continuous production.

Description

technical field [0001] The invention relates to a spray fluidized bed granulator with multiple spray units, which belongs to the technology of granulation devices. Background technique [0002] At present, the structure of the granulator that implements jet fluidized growth granulation with crystal grains as the core is mainly composed of a shell, a gas distribution plate in the shell, and a nozzle. The granulator with such a structure has two deficiencies. One is that the phenomenon of back-mixing in the granulator is serious, which leads to the deterioration of the uniformity of the particle size of the product, and the returned material reaches more than 50%. The normal atomization of the nozzle leads to the clogging of the nozzle, which makes it difficult to ensure the continuous production. Contents of the invention [0003] The object of the present invention is to propose a spray fluidized bed granulator with multiple spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/16
Inventor 康仕芳陈松赵珺辛振林沈国宏张猛
Owner TIANJIN UNIV
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