SU1493710A2 - Apparatus for heating and drying mineral materials - Google Patents

Abstract

The invention relates to construction equipment, in particular, to devices for heating and drying mineral materials in the preparation of asphalt concrete mixture, and is aimed at reducing energy consumption and intensifying the processes of heating and drying. This is achieved by installing additional paddle nozzles with the top edges bent away from the diaphragms mounted on the outer surface of the shell in pairs in pairs opposite to the limb of the top of the main nozzles mounted on the drying drum. Each additional nozzle is located in a plane passing through the axis of the drum. 3 il.

Description

The invention relates to construction equipment, in particular, to devices for heating and drying mineral materials in the preparation of asphalt concrete mixture.

The purpose of the invention is to reduce energy consumption and to intensify the process of heating and drying.

FIG. 1 shows the device section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one .

The device for heating and drying mineral materials contains a drying drum 1 with paddle nozzles 2, a cylindrical shell 3 with paddle nozzles 4 coaxially fixed in it, a loading box 5 and a discharge box 6.

In the shell 3 there are transverse slots 7, and on its outer surface, on the sides of each slot 7, pairs of diaphragms 8 and 9 are fixed with additional paddle nozzles 10 having upper edges bent to the side. On the opposite side of the loading box 5 is located the combustion device 11.

Diaphragms 8 and 9 are inclined at an angle of 36-50 ° in the direction of the unloading box biv cross section of the casing 3 are located along the forming truncated cone, and for additional nozzles 10 the upper edges are bent in the direction opposite to the limb of the top of the blade nozzles 2, each the nozzle 10 is located in the plane4 WITH CO

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bone passing through the axis of the drying drum 1.

In order to evenly distribute the flow of hot gas and better blow the material being poured over the entire length of the drum 1 of the diffraction 9, as they move away from the furnace 11, they protrude into the shell 3 with gradually increasing height of protrusions

in the zone In the drum 1, the safety rings -2 ,, are attached to the diaphragms 8, protecting the combustion zone of the flue 11 from falling into the material particles.

Device for heating and drying m; The eral; s materials work as follows.

The material through the loading box 5 enters the drum 1, is captured by the paddle nozzles 2 and when the drum 1 rotates rises to the extreme upper position, where it is poured onto the paddle nozzles 4 and the shell 3, from which further rotation of the drum 1 is dropped onto the paddle: At the same time, the material is simultaneously transported by paddle nozzles 2 and 4 towards the unloading box 6. In zone B of the drying drum 1, the mineral material is partially poured through slots 7 at the top, slipping along the surface of the diaphragms 9 and additional nasad- ham 10, through the inside of gull obe- 3 and through the slot 7 on the bottom surface of the diaphragm 8 and the nozzles 10 in the nozzle 2 peresypaets.

Additional nozzles 10 ensured

The passage of mineral material through the hottest zone and its more uniform distribution over the cross section of drum 1 is reduced, which reduces the energy consumption for the rotation of drum 1 by reducing the degree of unbalance distribution of the material.

In this zone, heat transfer is mainly carried out by convective heat exchange of gases, guided into the slots 7 by diffractions 9 and fittings 10 with particles of material. Heat exchange is also carried out through the surfaces of the shell 3, the vanes of the nozzles 4, the diffraction of 8 and 9 and the nozzles of 10.

In zone D, radiant heat is added to the previously listed methods of heat transfer.

The invention provides for intensification of the processes of heating and mineral material by increasing the area of their contact with the exhaust gases, as well as reducing energy consumption by providing accelerated preparation of the mineral material and its more uniform distribution over the cross section of the drying drum.

Claims (1)

Invention Formula A device for heating and drying mineral materials according to ed. St. No. 11882.32, characterized in that, in order to reduce energy consumption and intensify the processes of heating and drying, pairs of fixed on the outer surface of the diaphragm shell are fitted with additional paddle nozzles mounted on them with bent upper edges to the side opposite to the bend of the top of the main nozzles of the drying drum, wherein each additional nozzle is located in a plane passing through the axis of the drying drum. .h-  H h h h h h h h h h h h h .. h V g FIG. 2 5