SU1765649A1 - Finely divided materials drier - Google Patents

Abstract

Use: for drying fine material. SUMMARY OF THE INVENTION: The installation comprises a vertical case 1, with a cover 3 and a bottom 5, inside which vertical elements 7 are placed, with free ends immersed in a layer of material and installed at a distance from the bottom. 1 il.

Description

This invention relates to devices for dewatering fine materials in a vibrating layer and can be used in the chemical, pharmaceutical, metallurgical, food industry.

Also known are designs of plants for drying fine material containing a vertical body with a lid and bottom, inside which, with a gap relative to each other and the walls of the body, vertical elements are placed, with free ends immersed in the material layer, as well as a loading opening in the upper part and a discharge port in the lower part parts and vibrator (AS No. 252191, cl. F 26 V 17/24, 1968) ..

The disadvantage of such installations is that with a decrease in the size of the particles of the material to be lived, the vibration effect leads to the spouting of the layer due to the intensive formation and release of bubbles. In the case of removal of the gas phase from the chamber volume, this leads to dust removal of the material from the layer. When immersed in a layer of nozzles, such as pipes and grids, particle emissions into the over-layer space decrease, however, the layer is braked, which during sintering processes may lead to sintering of the material.

The aim of the invention is to reduce dust removal by reducing the flow of the vibrolayer while maintaining its high mobility.

The goal is achieved by those. that in the known installation, the vertical elements immersed in the layer are installed with free ends from the bottom at a distance of (O, OBOL 25) h / H, and the gap between them and the walls of the housing is (0.2-0.4) Ots / D, this height of the body H is equal to H (1-4) H / D, where D is the diameter of the body; Ots - diameter of the cylinder; h is the height of the free end from the bottom.

The drawing shows a general view of an installation for drying fine material in a vibrating layer. The installation contains a vertical body 1 with a transverse dimension D and height H, equipped with a heating jacket 2, the body has a lid 3 with a loading opening A, a bottom 5, a discharge nipple 6. Inside the case there are vertical elements 7, fixed in the lid and immersed in a layer of dried

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my product. The free ends of the elements are installed at a distance (0.05-0.125) N from the bottom, and the gap between them and the walls of the housing is (0.2-0.4) 0. The area of the submerged side surface of the elements is not less than 0.05 DH. The installation has a vibrodrive 8. The lid 3 is provided with a nozzle 9 for venting the gas phase from the body to the trap, and a hatch 10 for blocking the loading opening 4. The unloading nozzle 6 is equipped with a valve 11 entering into it. The valve 11 is mounted for axial movement by means of a rod 12, passing through the discharge pipe 6, and attached to it. The rod 12 for transmitting the translational motion to it is connected to the stopper mechanism 13 located in the lower part of the discharge port 6 on the discharge pipe 14, which has a nozzle 15 with perforations for sifting the dried material.

As the dried material uses, for example, ammonium metavanadate with a dispersion of less than 20 microns. The installation works as follows.

The valve 11 is closed. The wet product is fed through the loading opening 4 in the lid 3 into the installation body 1. After the loading, the opening 4 is closed by the hatch 10. Vertical vibration is transmitted to the housing 1 by means of a vibrator, and heat carrier is fed into the chamber jacket. As the fine material dries, its mobility increases, and gradually the layer goes into suspension. The fountains of material during this period of drying do not occur due to immersion in the layer of elements 7. After drying, cold water is supplied to the heating jacket 2, and the material is cooled. Valve 11 then opens, and under the action of

The vibration material is transported through the discharge pipe 6 through the discharge pipe 14 to the receiving container. In doing so, the material is sifted through a perforated nozzle 15.

The introduction of vertical elements having size ratios within the claimed limits into the layer of dried fine material allows

reduce the flow of the layer without reducing its mobility, by facilitating the removal of excess gas pumped into the layer, since along the elements, preferential gas exchange zones are formed between the vibratory layer and the superlayer space. In this case, Pyleunos decreases several times according to the test data.

The proposed installation can process materials of dispersion less than 20

Claims (1)

μm down to the finest dispersions. The invention The apparatus for drying fine material comprising a vertical body with a lid and a bottom, inside of which a gap relative to each other and the walls of the case are placed vertical elements, the free ends immersed in a layer of material, the loading opening in the upper part and the discharge pipe in the lower part, a vibrator, characterized in that, in order to reduce dust removal by reducing the flow of the layer while maintaining its mobility, the free ends of the vertical elements are set from the bottom at a distance of 0.05-0.125 h / H, and the gap between them and the walls of the case is D4 / D 0.2-0.4, while the height of the case H is 1-4 H / D, with where h is the height of the free end from the bottom, D - case diameter; Ots - diameter of the cylinder. 70 4 In /////////////////; /////// /// J /// f