RU2149683C1 - Apparatus for fluidization of solid granular material - Google Patents

Abstract

FIELD: devices for fluidization of solid granular materials. SUBSTANCE: device includes housing, inlet cone and gas distributing unit made in form of sand core. EFFECT: smooth distribution of fluidizing agent; extended field of adjustment of state of fluidized granular material. 3 dwg

Description

 The invention relates to fluidization devices for solid granular materials.

 Known fluidization devices for solid granular material equipped with gas distribution devices in the form of metal gratings [1,2,3], nozzles, etc. Similar gas distribution devices are used in large and small industrial plants. They do not provide a uniform fluidization regime. Due to the insufficient distribution of air over the cross section of the apparatus, the passing agent forms gas bubbles in the thickness of the layer, which leads to a gushing fluidized bed. A gushing fluidized bed is extremely undesirable, as it leads to an uneven distribution of the granular material over the cross section of the apparatus.

 The closest analogue to the proposed technical solution is an apparatus for carrying out processes in a fluidized bed, where to ensure regular flow of bulk material with low hydraulic resistance of the grating and the layer, the apparatus is equipped with a compensating tank connected to the transfer device, the lower part of which is made in the form of a saddle with in it with a valve [4] a.s. 6,763,115 B 01 J 8/26, published in Bulletin N 28, 1979

 The disadvantage of such devices is the design complexity and lack of efficiency of the gas distribution device. The objective of the invention is the uniform distribution of the fluidizing agent and expanding the ability to control the state of the fluidized bed of granular material.

 For this, the fluidizing agent entering the apparatus passes through a gas distribution device 3 made of a foundry rod mixture, fixed between the housing 1 and the inlet cone 2. The gas distribution device (foundry core) is a capillary-porous body, the pores of which are channels of the most complicated configuration, which leads the absence of dominant gas agent flows at the outlet of the device. This ensures uniform distribution of the feed rate of the agent over the entire cross-sectional area of the apparatus. In order to vary the dispersion of the fluidizing agent stream, it is possible to use gas distribution devices of different thickness and structure. An increase in their thickness leads to a more uniform distribution of velocities over the cross section of the apparatus. Increased dispersion is achieved by using finer sand in the manufacture of a gas distribution device and by increasing the degree of compaction of the core mixture.

 In FIG. 1 shows the proposed apparatus for fluidization, a vertical section; in FIG. 2 is a view A in FIG. 1; in FIG. 3 is a view B in FIG. 1.

 The apparatus for fluidization of solid granular material consists of a housing 1, an inlet cone 2, intended for supplying a fluidizing agent. Between the body and the cone, a gas distribution device 3 is installed, made in the form of a dry sand casting core. The tightness of the connection of the cone of the body and the gas distribution device is carried out by using rubber gaskets 4. To connect the structural elements of the apparatus, studs 5 with thumbs are used 6. The studs are mounted on the cone of the apparatus with eyes 7. For fixing the body, the forks 8 are made on it.

 The device operates as follows.

 The gas distribution plate is laid through the gaskets 4 in the cone 2. Then, the housing 1 is installed and the structural elements of the apparatus are pulled together. A fluidized solid granular material is poured into the assembled installation. The fluidizing gas agent is turned on. The agent, coming from the cone and passing through the gas distribution device, is distributed by the glow and, falling into the apparatus body, creates a uniform fluidized bed of granular material of the required structure. After carrying out the required technological processes in the fluidized bed, the supply of the agent is stopped, and the processed material is unloaded from the installation.

 The use of a gas distribution device in the form of a dry sand casting core made of a foundry mixture in the apparatus design provides the following advantages: uniform distribution of the velocity of the fluidizing agent supplied over the entire cross-sectional area of the apparatus; increase in dispersed gas flow; simplicity of design; the scarcity and low cost of materials used for the manufacture of gas distribution devices; the speed of manufacturing the gas distribution plate; quick change of gas distribution plates when changing the fluidization mode or wear.

References
1. USSR author's certificate N 1082479, cl. B 01 J 8/18, 1982.

 2. Copyright certificate of the USSR N 1388107, cl. B 05 C 19/02, 1986.

 3. Planovsky A.N., Nikolaev P.I. Processes and apparatuses of chemical petrochemical technology: Textbook for universities. - 3rd ed., Revised. and add. - M.: Chemistry, 1987 .-- 496 p.

 4. A.S. 676315, B 01 J 8/26, published. in bull. N 28, 1979

Claims (1)

 An apparatus for fluidizing solid granular material, comprising a housing, an inlet cone, a gas distribution device, characterized in that the gas distribution device is made in the form of a dry sand casting core.

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