RU1805270C - Shaft furnace with cross heat-transfer agent feed - Google Patents

Description

The invention relates to the construction of shaft furnaces for heat treatment of lump or granular material, for example, limestone, phosphorite, cement clinker, etc., and can be used in the construction materials industry, in the chemical, metallurgical and other industries.

The aim of the invention is to increase operational reliability and reduce the consumption of refractories.

In FIG. 1 shows a General view of the described shaft furnace (longitudinal section); in FIG. 2 is a section AA in FIG. 1.

The shaft furnace comprises a shaft 1 bounded by the walls 2, the cavity 3, the ceiling 4, the gas distribution walls of the bars 5 and the protrusions 6 of a L-shaped form. The beam is made of components with serrated end faces that are in tight engagement during assembly (Fig. 2). L-shaped protrusions 6 are stacked at the joints of the joints of adjacent components of the bars. The inlet cavity of the cooling zone by duct 7 is connected to the blower fan 8, a. the outlet cavity of the furnace by a gas duct 9 is connected to the exhaust fan 10. A hopper is attached to the furnace above

11. and the bottom of the furnace is equipped with a unloader

12. The use of beams from components allows to significantly reduce shrinkage deformation in the beam and bending moment, which prevents their breakage and helps to increase operational reliability and reduce the consumption of refractories. Serrated end faces ensure tight engagement of the component parts of the bars, and the installation of the L-shaped protrusions at the joints of the joints of adjacent components ensures their strict

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fixing and maximum strength of gas distribution walls.

Shaft furnace operates as follows.

Material and solid fuel in the direction of arrow 13 enters the hopper 11 and then into the shaft 1, where it is burned, then it is cooled and, in accordance with arrow 14, is discharged from the heat treatment process using the unloader 12. Air is forced by the fan through the gas duct 7 into the inlet cavity 3 along arrows 15, then through the gaps between the bars it enters the material layer, is filtered in it and cools the material, and the heated heat carrier is discharged into the outlet cavity and directed to the upper inlet cavity in the direction of arrow 16 3, passes into a layer of material, ignites solid fuel and is consumed for its combustion. Exhaust gases are discharged through the outlet cavity 3 through the gas duct 9 by means of a smoke exhauster 10 and are removed in the direction of arrow 17.

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5

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The table shows the technical characteristics of the proposed device in comparison with the prototype.

Claims (1)

The invention is a shaft furnace with a cross-flow of heat carrier, comprising a shaft of rectangular cross section with refractory walls and gas distribution elements located along the height of the shaft of the furnace, forming cavities for passage of heat carrier with side walls and ceilings, characterized in that, in order to increase operational reliability and to reduce the consumption of refractories, gas distribution elements are made in the form of composite beams of plates of rectangular cross-section and protrusions of a L-shaped shape, while the plates of beams made with serrated end faces that mesh during assembly, and the L-shaped protrusions are placed at the joints of the joints of adjacent components of the bars. AND