RU2002824C1 - Bowl-shaped cooler for lumpy iron-ore material - Google Patents

Description

The invention relates to the production of iron ore raw materials and ferrous metallurgy, and in particular to the design of devices for cooling agglomerated iron ore materials - sinter and pellets.

After agglomeration, such materials are subjected to forced cooling in coolers, for example cup coolers, distinguished by good cooling effect and operational reliability.

In order to utilize the heat of the exhaust hot air and to clean it, designs of bowl coolers have been proposed in which this air is collected and organized.

For example, a cup cooler for agglomerated iron ore materials is known, comprising an annular hopper connected to a rotary drive with an external m inner louvered walls, a ram, an unloading knife, an inner chamber divided in height into upper and lower parts, a central air outlet in the form of a pipe connected to top of the inner chamber.

High-temperature air from the upper part of the chamber is directed through the central air vent to recovery into the corresponding heat exchanger, and low-temperature air from the lower part of the chamber is released into the atmosphere. This selection of high temperature exhaust air makes it possible to use it more efficiently.

The disadvantage of this technical solution, however, is that dusty low-temperature air is actually uncontrolled to be released into the atmosphere, which, on the one hand, is unacceptable from the point of view of environmental requirements, and, on the other hand, leads to irretrievable losses of low-temperature heat, also having a certain value.

The purpose of the invention is to increase the economic and environmental performance of the cooler.

This is achieved by the fact that the bowl cooler is provided with an additional nozzle concentrically arranged relative to the central air outlet and connected to the lower part of the inner chamber.

The bowl cooler can also be equipped with a casing covering the outside of the upper part of the hopper, to which an additional pipe is connected.

With this embodiment of the cup cooler, an organized discharge of low-temperature air from the lower part of the chamber is provided either outside the cooler or to the upper part of the hopper, where it re-passes through the cooled material and is additionally heated, which increases its energy value.

In FIG. 1 shows a diagram of a cooler with the discharge of low-temperature air outside the cooler; in FIG. Option 2

a cooler in which low temperature air is supplied to the top of the hopper. The bowl cooler consists of an annular hopper 1 with an outer 2 and an inner 3 louvered walls, installed and

5 of the plate 4, suspended on the central column 5 and equipped with a drive 6 and an unloading knife 7. The inner chamber 8, covered by an annular hopper, is closed from above by a wall 9, from below - by a wall 10 and is divided in height by a partition 11 into upper and lower parts. The upper wall is connected to the outer pipe 12, which is adjacent to the stationary pipe 13. The joint between the pipes 12 and 13 is provided

5 by a seal 14, and through a lateral branch pipe 13 is connected to the heat exchanger 15 and the fan 16. The partition 11 is connected to the inner pipe 17, which is concentrically external

0 pipe 12 and through the seal 18 is connected to the inner shell of the stationary pipe 13 connected to the fan 19.

In the embodiment of FIG. 2, the fan 19 is connected via a pipeline to a stationary casing 20, which extends externally to the upper part of the hopper 1.

The cooler operates as follows.

A plate 4 with an annular hopper 1, an inner chamber 8 and nozzles 12, 17 is driven by means of a drive 6 to rotate around a central column 5. Cooled material (sinter or pellets) is loaded into the hopper from above. Fan tori 16

5 and 19, air is sucked out of chamber 8. In this case, air is sucked through the louvered walls of the hopper and the material to be cooled. The cooled material is discharged from the tray 4 with a fixed knife 7 onto the conveyor belt.

Since, as the material to be cooled drops, its temperature decreases, a high-temperature air is sucked into the upper part of the chamber 8

spirit, and in the lower part - low temperature. The high temperature air passing through the heat exchanger 15 gives off its heat and is then released into the atmosphere. High temperature of this air provides high efficiency

heat transfer. The low temperature air sucked out by the fan 19 can be directed into the chimney or to heat the charge, or as in the embodiment of FIG. 2 to the upper part of the hopper 1, where it is repeatedly sucked through the cooled material, while its temperature rises, which allows it to be used more efficiently in the heat exchanger.

Thus, in the proposed cooler having a relatively simple

Claims (2)

1. A BOWL COOLER FOR FACILITATED RAIL MATERIALS, comprising an annular hopper connected to a rotary drive with external and internal louvered walls. a plate, an unloading knife, an inner chamber divided in height into upper and lower parts, a central air outlet in the form of a pipe connected to the upper part of the inner chamber. 0 the design provides heat recovery of both high-temperature and low-temperature air, while the organized discharge of low-temperature air significantly improves working conditions. It can be dust-cleaned and diverted through the chimney or reused in the process. (56) Japanese application No. 60-16501, cl. With 22 V 1/26, publ. 04/25/85. characterized in that. In order to improve the economic and environmental performance of the cooler, it is equipped with an additional nozzle concentrically located relative to the central air outlet and connected to the lower part of the inner chamber. twenty 2. The cooler according to claim 1, characterized in that it is provided with a casing covering the outside of the upper part of the hopper, to which an additional nozzle is connected.