SU714123A1 - Loose material fluidised bed dryer - Google Patents

Description

(54) DRYING BSBEUtEHHOro LAYER FOR BULK MATERIALS

The invention relates to a drying technique, and more specifically to installations for drying in a suspended state wet granular materials, for example, coal preparation products, and can be used in the coal, chemical and other industries. Installations for bulk solids in a fluidized bed are known, which contain a gas distribution grid installed on support beams in which the grate bars are equipped with spacer elements in the form of brackets 1. The disadvantages of this setup are increased wear and burning of support B supports, because they are TC under the gas distribution grid in the high temperature zone. In addition, spacer elements, made in the form of brackets, equal in thickness to the width of the gap between the grate bars, cannot compensate for the thermal expansion of the lattice in the transverse direction, which leads to its curvature. Suspended layer dryers are also known, containing a chamber and a gas distribution grid located in it, made of rods installed with a gap for the passage of heat transfer media lying on supporting transverse beams 2. A disadvantage of the known devices is the fragility and low operational reliability of the gas distribution grid. The purpose of the invention is to increase the operational reliability of the dryer. This goal is achieved by the fact that in the weighed layer dryer for bulk materials the grating is made sectioned and suspended on rods fixed in the chamber walls, and the rods in the section are pressed by means of spring clamps. FIG. 1 shows a general view of the weighed bed dryer described. FIG. 2 shows a section through dryer A-A with a view of the gas distribution grid. FIG. 3 shows an enlarged portion of the gas distribution grid of FIG. 2. In FIG. 4 shows the spring clamp bars. Suspended bed dryer for bulk materials contains drying

chamber 1 with gas distribution grid 2 and thermal insulation 3 supporting rods 4, supports 5. Lattice 2 is made sectioned out of rods 6 supported on the lower shelves of channels 7 and spring clamps 9, which are made up of housing 10, pusher 11 , springs, 12 and bolts 13. The chamber contains a hopper 14, a loading device 15. and a discharge device 16.

The suspended layer dryer for bulk materials works as follows.

The wet corner is loaded from the hopper 14 to the gas distribution grid 2, is penetrated by the gas coolant, dried and removed by the discharge device 16, the hectare heat carrier gives off some of the heat to the gas distribution grid elements as well, resulting in a change in their dimensions. Therefore, the supporting elements — rods 4 — are located at the VBSHE of the surface of the gas distribution grid) in the zone of low temperature, and the thermal deformations of the supporting rods are insignificant. -::

The bars of the lattice, on which the heat carrier gas is heated before, are divided into several rows of X / shorter sections.

The radial expansion of the bars is compensated by the clampers 9. Spring-loaded 12 bars and brackets 8

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in the case of radial thermal expansion, the push rod 11 is pressed, which shrinks in the housing 10 by the required amount and compresses the spring. The force of the spring preload is adjusted by the bolt 13.

The described dryer allows to achieve uniform drying of the material, to reduce the metal intensity of the gas distribution grid by about 25% and to increase the reliability of the dryer with a large unit capacity.

Claims (2)

1. The author's certificate of the USSR 558701, cl. R 26 B 17/10, 1975. 2. Filipov V.A. Technique and technology of drying coal, M., Nedra, 1975, p. 107. fie.7 9 Tl one