SU1596194A1 - Rotary furnace heat-exchanger - Google Patents

Abstract

This invention relates to a heat exchange technique and can be used in the building materials industry. The purpose of the invention is to increase the efficiency of heat transfer and reduce dust removal. The heat exchanger contains longitudinal parallel to each other and the axis of the furnace 1 partitions 2, at the ends of which axis 4 is installed with gates 5 that are hingedly attached to them, and on the sides of the part 2 which are external to the axis of the furnace 1, there are protrusions 3 close to its body.

Description

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The invention relates to a heat exchange technique in rotary kilns and can be used in the industry of building materials.

The aim of the invention is to increase the efficiency of heat exchange and reduce dust removal.

FIG. 1 shows a diagram of the furnace, a longitudinal section; in fig. 2 is a view A of FIG. one.

Inside the rotary kiln 1, there are parallel partitions between the axes of the kiln 1 and the protrusions 3 on the discharge side. Axes 4 are located on the discharge side, on which gates 5 are hinged, the slope angle of which is determined by a given degree of velocity measurement (the greater the slope angle is, the greater the change speed).

The configuration of the gates 5 is determined by the outlines of the cutting plane passing through axis 4 to intersect with the side of the partitions 2 without protrusions 3 on them. The protrusions 3 on the partitions 2 are made from their outer relative to the axis of the furnace 1, the sides of the partitions 2 close to the furnace body 1, and the configuration of the projections 3 is determined by the configuration of the valves 5 when they rest on the partitions 2 for reasons of complete closure of the gap between the furnace body 1, the partition 2 and gate 5 taking into account the dumping of material from the projections 3 in the direction of unloading of the material. The number of partitions 2 is chosen depending on the diameter of the furnace 1, taking into account the passage of clods of the material being processed. In principle, the more partitions 2, the better the heat exchange, but the construction is more complicated. The length of the partitions 2 along the axis of the furnace 1 is determined by thermal calculation. The position of the axes 4 relative to the partitions 2 is determined by the given angle of inclination to the axis of the furnace I while supporting the gates 5 on the partitions 2, which, in turn, is determined by the given change in the velocity of the gases (the closer the axis 4 to the partitions 2, the greater the change in the velocity of the gases ). In order to increase the efficiency of the axis 4, the hollow stems are made to exit from the furnace body 1 and coolants, for example air, circulate in them, and the dampers

5 to be made together with an eyelet on axle 4 of fireclay bricks or other refractory material (not shown). The remaining dimensions are determined constructively and tested for strength and performance.

The heat exchanger operates as follows.

The material due to the inclination and rotation of the furnace 1 enters the cells formed by the partitions 2, and moves along them with lifting and pouring when heated with hot gases. When the position shown in the drawings, the gates 5 lie on the partitions 2 and with further rotation,

when the partitions 2 are inclined by an angle greater than the angle of repose of the material, it begins to pour over the partition 2, but does not fall down from it, since the gate does not interfere. With the vertical position of the partitions 2, they enter the material, then begin to rise and the gates 5, under the action of the weight, are rotated and transferred to another partition 2, the excess material is dropped from the projections 3, and the process is repeated.

The use of the proposed heat exchanger increases the efficiency of heat exchange due to an increase in the rate of gases, since the efficiency of heat exchange is proportional to the square of the rate, as well as because of its change. This leads to fuel economy. The exclusion of bulk material from the bulkheads 2 into the gas flow leads to savings in raw materials as well as fuel due to the reduction of heat removal from dust.

Claims (1)

Invention Formula A rotary kiln heat exchanger containing longitudinal and parallel axes of the partition wall furnace, characterized in that, in order to increase the heat exchange efficiency and reduce dust removal, it is provided at the discharge end with gate valves hinged on the axes with each partition, and the partitions are made with projections located on external furnace axes close to the furnace body. FIG. 2