SU687893A1 - Grate bar cooler for loose material - Google Patents

Abstract

1. grate cooler for cooling particulate material predominantly alumina sinter, comprising a body, a grate, overfire air chamber and common chamber to blow into the feed end of the refrigerator defined therein mechanisms for moving the grate and conveyor prosypispeka, characterized in that, in order Intensification of the cooling and sintering mechanisms of the lattice and conveyors of spillage, in the chambers of the sharp and general blowing from the side of the sub-lattice space an air diffuser is installed The cooling refrigerator according to claim 1, characterized in that the air distribution device is designed as plates mounted at an angle to the grate, and the installation angle of the plates is consistently reduced from top to bottom. The refrigerator cooler according to claim 1, which differs by the fact that the air distribution device is made in the form of concentric curvilinear elements, the radius of curvature of which gradually increases from top to bottom. S (LS1 The invention relates to the field of non-ferrous metallurgy Etalls, in particular, the production of alumina by sintering, and can be used to cool alumina sinter or other bulk material. A grate cooler is known, including a grate from alternating moving and fixed grates, dividing the refrigerator into two cavities in height, t a sharp blow chamber, a common blow chamber with transverse ne-partitions and sublattice space, conveyors for cleaning spillage of material and lattice drive mechanisms and conveyors The main disadvantage of the known cooler is the uneven distribution of cooling air in the sublattice space with side air supply, which leads to uneven cooling of the metal structures of the grate and the cake itself. This uneven distribution of air is exacerbated by C5oo-vioo co oo

Description

when longitudinal slopes are formed in the sublattice space, small material is requested. The grate cooler of the DPP cooling of the bulk material is known, including a housing, a grate, a sharp blowing chamber and a common blowing chamber in the charging end of the refrigerator with mechanisms installed therein for moving the grate and conveyors of spake spillage. The refrigerator contains a grate, a conveyor for removing material spillage from the sublattice space. The cooling air is supplied from a fan located in the end portion of the boot end of the refrigerator. The main disadvantage of the known refrigerator is the absence of the presence of cooling air to the hottest areas of the refrigerator (the first rows of grates and supporting devices), despite the air supply from the charging end of the refrigerator. This is related both to the directionality of the air along the rodshield and to the uneven aerodynamic resistance of the lattice and material layer, especially in the loading section of the refrigerator, the lattice width (due to aggregation of the material across the lattice width) and the lattice length (due to spillage in the course of the material). The aim of the invention is to intensify the cooling of the sintered mechanisms of the grate mechanisms and spill conveyors by increasing the speed and ensuring a certain directionality of the supply of cooling air. The goal is achieved by the fact that an air distribution device is installed in the chambers of an acute and general blowing from the sub-grid space. In addition, the air distribution device is made in the form of plates installed at an angle to the column louvre, with the plate installation angle successively decreasing from top to bottom, the air distribution device is made in the form of concentric curvilinear elements, the radius of curvature of which is gradually increasing from the top. Fig. 1 shows a general view of a refrigerator with an air-distributing device in the form of plates; FIG. 2 - a general view with a device in the form of concentric curvilinear elements. The figures indicate: loading shaft 1 of the refrigerator, sharp grate 2 blowing, grate 3, made of moving and stationary grates with supporting devices, the grating space a, podrrg brush space - b, transverse partitions 4, chamber 5 sharp blowing, external chamber 6 a common blow, a mechanism 7 for moving the grate 3, a mechanism 8 for moving the conveyors 9, request, an air distribution device plate 10, curvilinear elements 11. Plates 10 or elements 11 increase the speed growth and provide a desired cooling air thus thrust toward teplonapr-adjoint movement mechanism portions 7 of the grate 3 from the chamber 5 and overfire air to the mechanism of movement of conveyors 9 spillage of total blowing chamber 6. The arrangement of the mechanisms 7 and 8 in the remote chamber 6 of a common blow prevents them from dust and overheating. The implementation of this invention on the grate cooler allows increasing the service life of the mechanisms and grates in the hot zone of the refrigerator and improving the SPEC cooling depth by 20-30 by increasing the cooling depth of the spec. To cool the alumina cake obtained in rotary kilns of 5x185 m, the Volga 125C grate cooler, reconstructed using the proposed technical solution, is used. The grate 3 of the repulsive type, consisting of alternating 1xs of fixed and moving grates, is divided in length into two sections. The drive for moving the first grid is moved out of the sublattice space b into the chamber 6 common to blow in the loading end of the refrigerator. The drive of the second lattice is taken out of the sublattice space P at the cold end of the cold peak. The cooling air is supplied through the chamber 5 of an acute blow with a special grate 2 of an acute blow and the chamber 6 of a common blow. The common blowing chamber 6 and the sharp blowing chamber 5 are separated from the sublattice space by an air distribution device, filled in the form of plates 10, set at an angle to the grate, the angle decreases successively from top to bottom from +50 for the top, + 40 ° for the second , + 25 ° for the third, -20 ° for the fourth and -35 for the bottom plate. Mechanism. the movement of the grate provides the movement of the grate 150 mm at a frequency of 1.0–20 strokes per minute. The specific consumption of cooling air is 3-3.5 spec. About 100 sinter per hour with a temperature of about 1000 ° C come to the refrigerator from the furnace and, after cooling in a transverse air flow with a temperature of 80100 ° C, are sent for hydrochemical processing.

878936

I p and m f: p 2. The grate cooler is of analogous design, but the HanpaHJTHhiutee device is made in the form of curvilinear elements 11, the radius of curvature of elements 11 is from top to bottom, respectively, 0.5-0.9 - 1, And m. And the bottom element with a radius of 1, 4 m is directed down to the layer

Q spill spake in spill conveyor.

The use of a guide device with straight or curved plates at the entrance to the sub-grid space of the refrigerator behind

15, by providing the necessary directivity and increasing the speed of the cooling air, can significantly improve the cooling conditions of metal structures and mechanisms in

20 hot end of the refrigerator, 1.5 times increase the service life of grates, support devices and spill conveyor, as well as intensify the cooling of the cake with a decrease in its

25 inappropriate temperatures from 120-140 ° C to 80-100 ° C, which improves the working conditions of subsequent belt rubber conveyors.

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Claims (1)

1. GRAVE REFRIGERATOR FOR COOLING BULK MATERIAL, mainly alumina cake, including a body, grate, a sharp blast chamber and a common blast chamber at the loading end of the refrigerator with mechanisms installed for moving the grate and sprinkler conveyors