SU1491539A1 - Submersible drum-type crystallizer - Google Patents

Abstract

The invention relates to chemical engineering and allows increasing productivity due to intensification of the crystallization process. The immersion drum mold includes a housing 1, heat exchange elements (TO) 2 with corrugated surfaces placed on a hollow shaft 13, a vertical partition 4, brushes 7 mounted rotatably and in contact with corrugated surfaces TO 2, a paddle stirrer 3. Initial solution enters the upper part of the housing 1, is entrained in the flow of the suspension in the direction of rotation TO 2 and is cooled to the crystallization temperature. Blade stirrer 3 creates turbulization of the suspension, and brushes 7, in contact with TO 2, effectively clean them from incrustation, intensifying the process of crystallization from solution. 1 hp ff, 1 ill.

Description

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The invention relates to the field of chemical engineering, in particular to immersion drum molds for carrying out crystallization processes from solutions in the chemical and related industries.

The aim of the invention is to intensify the crystallization process by increasing the heat transfer coefficient and increasing the heat exchange surface.

FIG. 1 shows a mold, a general view; in fig. 2 shows section A-A in FIG. one.

The mold contains a housing 1 for containing the solution, heat exchange elements 2 for cooling the solution to a predetermined temperature, a paddle stirrer 3 for mixing the solution, a vertical partition 4 not touching the heat exchange elements 2 and dividing the volume of the upper part of the housing 1 into the zone 5 of the initial solution and a suspension removal zone 6, provided with brushes 7, in contact with corrugated heat exchange elements 2 and intended for their de-cracking, drives 8 and 9 for transmitting rotation by heat exchange lementam 2 and 3 blade stirrer.

The housing is equipped with a fitting 10 for supplying the initial solution and fitting 11 for removal of the suspension. The heat exchange elements 2 consist of separate hollow corrugated discs 12 mounted on a common hollow shaft 13, the inner cavity of which is divided by partitions 14 into two isolated cavities 15 and 16, each of which is connected by holes to hollow corrugated discs 12. Each of the cavities is provided with fittings 17 and 18 for the inlet and outlet of the refrigerant. A fitting 19 is located in the lower part of the body. It is designed to drain the suspension when the mold is stopped.

The mold works as follows.

The initial solution of the crystallized salt enters the upper part of the housing 1 in zone 5, and then is carried along by the flow of the suspension in the direction of rotation of the heat exchangers.

EMIUMENT 2 and cooled to the crystallization temperature.

Intensively operating paddle stirrer 3 creates turbulization of the suspension, and

The brushes 7, which are in contact with the corrugated heat exchange surfaces of the disks 12, effectively clean them from incrustation, intensifying the crystallization process from the solution.

The excess suspension contained in the zone

b. Continuously discharged through fitting 11. When the crystallizer is stopped, the slurry is discharged through drain fitting 19.

The implementation of heat exchange elements 2 in the form of hollow corrugated disks 12, which are fixedly mounted on a common hollow shaft 13, makes it possible to increase heat transfer, substantially develop the heat exchange surface and increase the reliability of the cooling system of the mold. These advantages allow to increase the productivity of the mold. And the possibility of the brushes to rotate, ensures their uniform wear around the perimeter and, consequently, the durability of their work.

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Claims (2)

1. Submersible drum mold, comprising a housing, heat exchange elements placed on the hollow shaft, divided by a partition into two cavities, combined with a teloobmenny elements. a paddle stirrer and a vertical partition, characterized in that, in order to intensify the crystallization process by increasing the heat transfer coefficient and increasing the heat exchange surface, heat exchange elements are made in the form of hollow discs with corrugated surfaces perpendicular to the axis of rotation, the vertical partition is installed in the diametral plane and provided with a brush 1and adjacent to the corrugated surfaces of heat exchange elements. 2. A crystallizer according to claim 1, characterized in that, in order to increase the durability of the brushes, they are installed in a vertical partition with the possibility of edging. eleven with RF Srig.2