SU1629719A1 - Rotating furnace heat exchanger - Google Patents

Abstract

This invention relates to a heat exchange technique in rotary kilns 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 exchanging device of the rotary kiln contains longitudinal partitions 2 parallel to each other and the axis of the furnace 1, at the ends of which at an angle not less than the angle of repose of the material are inclined partitions 3 with pockets 5 that do not reach the furnace body 1 from the first rotation side with pockets 5 bottom down. 2 Il.

Description

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About S3

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This invention relates to a heat exchange technique in rotary kilns 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 emission.

FIG. 1 shows a device, a longitudinal section; FIG. 2 is a view A of FIG. one.

Inside the rotary kiln 1, longitudinal partitions 2 parallel to each other and the axis of the furnace 1 are located, from the discharge end of which inclined partitions 3 are located, forming together with wall 4 a pocket 5. Similar partitions 3 and pockets 5 can also be made on the loading side of partitions 2 (shown dashed line) in cases when it is possible to dump material from partitions 2 and from the loading side. Moreover, their location is better to do in the mirror position relative to the partitions 3 on the discharge in order to change the direction of the gas flow.

The number and length of the partitions 2 is determined by thermal calculation. The inclination of the partitions 3 take at least the angle of repose of the material so that it is dumped from them in the lower position without lifting. The length of the partitions 3 is determined by the required increase in the velocity of the gases {the longer, the stronger the living cross section between the partitions 2 overlaps, the greater the velocity of the gases), taking into account the exclusion of material flowing through them. The size of the wall 4 and its slope are determined by the required volume of the pocket 5, which is determined by the volume of material to be poured from the partition 2 during rotation. Wall 4 does not reach the furnace body 1 by an amount approximately

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equal to the maximum thickness of the layer of material in the furnace 1, for those reasons that the pocket 5 does not fill with material when lifting the lower position. The remaining dimensions are determined constructively and tested for strength and operability.

The heat exchanger operates as follows.

The hot gases pass through the gaps between the parts, the partitions 3 and the walls 4, and then between the partitions 2, while their speed increases due to the narrowing. The material moves along the bulkheads 2 with lifting and pouring,

moreover, pockets 5, which, at the position shown in FIG. 1, catch this material, and when rotating through 180 ° the material by partitions 3, prevent dumping “go” from the discharge side into the gas flow.

rejected against the turn.

The use of a heat exchanger impairs the efficiency of heat exchange by increasing the gas velocity, which leads to fuel economy. Reducing dust leads to savings in raw materials as well as fuel by reducing heat loss with dust.

Claims (1)

Invention Formula A heat exchanger for a rotary kiln containing parallel between the axle of the furnace and the longitudinal partitions characterized by the fact that increase heat transfer efficiency and reduce dust removal, it is provided with longitudinal partitions located at the ends at an angle not less than the angle of repose of the material, inclined partitions with pockets that do not reach the furnace body from the first side during rotation the location of the pockets bottom down.