SU757823A1 - Shaft refrigerator for cooling loose material - Google Patents

Description

The invention relates to the field of cooling of bulk materials, in particular to the mine refrigerators, and can be used in the coke, electrode, aluminum and cement industry.

The closest to the invention tehniches- ^{5 * * * *} Kim solution is Shaft refrigerator. for cooling bulk materials, consisting of a shaft * of a crushing and unloading device (1]. Bulk material is cooled in the plbt lowering layer with gas (air), ^{10 * * * *}

supplied to the lower part of the shaft (countercurrent) or through the side walls of the shaft (cross current). The material enters the shaft of the refrigerator with a temperature of 1000-1300 ° C after

heat treatment it in the oven. After reducing the temperature to ¹⁵ to 500-800 ° C, the material is sent for crushing and subsequent cooling to a temperature of 150-250 ° C.

The disadvantage of this fridge is

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the fact that the temperature difference of the material height

mine reaches 800-1000 ° C and does not change

on time. In this case, the layer of material in the upper

mine horizons having a temperature of 10002

1300 ° C, constantly updated. The distribution of the refrigerant in the volume of the mine leads to the inevitable transfer of heat by convection from hot material to gas. This phenomenon contributes to the formation of layers along the height of the mine, the temperature of the material at the upper and lower limits of which remains constant. As a result, the achievement of the required minimum temperature of the lower layer of material in the mine is difficult, that is, its cooling efficiency is insufficient.

In addition, this design of the refrigerator does not ensure uninterrupted operation of the main unit (furnace). Carrying out repair work related. with the change of lining in the shaft of the refrigerator or the replacement of auxiliary ones. devices inside the mine are impossible without stopping the process.

The purpose of the invention is to improve the cooling efficiency of the material and the creation of conditions for repair work without stopping the process.

This is achieved by the fact that, in a shaft cooler for cooling bulk material,

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consisting of a shaft with loading and unloading devices, the mine is divided by radially arranged vertical partitions into equal sections, and the loading and unloading devices are equipped with sectional valves, each sectional valve made with a sector-shaped cutout and can rotate around its axis in a horizontal plane, and the angle between the radii forming the sector is equal to the angle formed by the vertical partitions in the section.

FIG. 1 shows a general view of the proposed shaft cooler for cooling bulk materials; in fig. 2 shows a sectional section of a shaft cooler along a horizontal section A-A in FIG. one; in fig. 3 shows the sectional valve.

The refrigerator consists of a shaft 1, divided by vertical partitions 2, into sections-3, loading 4 and unloading 5 devices having sectional valves 6. Each sectional valve 6 has a notch 7 in the shape of a sector. The cutout 7 of the sectional valve 6 has an angle between the radii forming a sector equal to the angle formed by the vertical partitions 2 in section 3.

When the refrigerator is operating, the calcined material enters one of the sections 3 of the shaft 1 through the loading device 4. The cutout 7 of the sectional valve 6 of the loading device 4 is aligned with section 3, which is filled with material. At this time, in one of the adjacent sections 3, the cooled material is unloaded, and in others it is cooled or processed (for example, with water vapor) in order to improve the quality. In the discharge section 3, the cutout 7 of the sectional valve 6 installed in the discharge device 5 is offset with respect to the cutout 7 of the valve 6 of the loading device 4.

Thus, continuous loading and unloading of the material is ensured and the optimum processing time in the refrigerator sections is achieved.

After reaching the required temperature of the material in one of the sections where the cooling is performed, the valves 6 are rotated in the loading 4 and unloading 5 devices and the operation cycle of the refrigerator is repeated.

Sectional operation of the refrigerator provides for the implementation of the operations of loading, cooling, and unloading the magnetic channel into units independent of each other. This prevents contact again, the incoming portion of the calcined (hot) material with a portion of the cooled or cooled material. In this case, it is possible to reduce the temperature of the material to the required limit with a shortened period of its processing or with a reduced refrigerant consumption. Periodic

_{10, the} filling of individual sections and the cyclical nature of their work allow them to be used as reactor chambers, for example, for treating calcined material in a vapor-air medium.

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The proposed design provides the ability to replace, out of the work section of the refrigerator, without stopping the main technological agent (furnace). Thus vre ₂₀ mja replacement of individual sections slightly and complexity of installation work is small. The use of such a refrigerator will significantly increase the utilization rate of rotary kilns.

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Claims (1)

Claim 1. Mine cooler for cooling ₃₀ of particulate material consisting of a shaft with a loading and unloading device, characterized in that, in order to increase the cooling efficiency of the material and the creation of conditions for D ₃₅ montnyh work without stopping the process, the shaft is divided radially disposed vertical partitions into equal sections, and a charging and discharge devices are equipped with sectional valves. ₄₀ 2. The shaft refrigerator according to claim 1, wherein each sectional valve is made with a cutout in the shape of a sector and can be rotated around its axis in a horizontal plane, moreover ₄₅ angle between the radii, forming a sector, is equal to the angle formed by the vertical partitions in the section.