SU1484360A1 - Roller-type crystallizer - Google Patents

Abstract

The device relates to the granulation of liquid materials by crystallizing them on a moving cooled metal surface. The invention increases the productivity and efficiency of the device by intensifying the process of cooling the surface of the mold by installing a rotating rotor 12 inside the drum 1, coaxially with it, made in the form of two disks 13 and 14 connected by struts 15. The longitudinal blades 16 of elastic material are fixed to the uprights 15 interacting with the inner surface of the roll 1. 2 Il.

Description

AND

Shig1

The invention relates to chemical engineering, in particular to equipment for the crystallization of melts of chemical products.

The purpose of the invention is to increase productivity by uniformly cooling the entire surface of the drum and increasing heat transfer and efficiency by reducing refrigerant consumption.

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

The roller mold contains a roll 1 fixed rotatably in bearing supports 2 and 3, associated with a rotational drive (not shown) of the wool wheel 4 and immersed by its lower part in the bath 5 with a branch pipe 6 for melt entry, and a knife 7. Inside the roll it is stationary a collector 8 is installed with openings 9 for supplying a liquid refrigerant and a pipe

10dl liquid refrigerant removal Inside the drum is also installed with

rotatably in bearing

11 rotor 12, made in the form of two disks 13 and 14, interconnected by posts 15, on which longitudinal blades 16 of elastomatic material are fixed, interacting with the inner surface of the drum 1. The rotor 12 is connected with an additional rotational drive (not shown ).

The mold roller works as follows.

In the bath 5 through the pipe 6 is continuously fed molten material

0

five

0

five

MA out of it through the pipe 10. When the rotor 12 rotates with the blades 16 from an additional drive, the blades interact with the inner surface of the drum 1 and the liquid refrigerant, to intensify the process of heat exchange between the heated wall of the drum and the liquid refrigerant. In this case, the liquid refrigerant film is turbulized on the upper and lateral inner surfaces of the drum. Moreover, due to the presence of longitudinal blades along the entire length of the drum surface, the heated liquid refrigerant is forced to be withdrawn, and thus the hot liquid film is quickly replaced with a refrigerant film. newly formed from the liquid refrigerant continuously supplied from the collector 8. This causes an increase in the thermal pressure and thereby increases the performance of the crystallizer, and also reduces the consumption of the liquid refrigerant, i.e. raises profitability. At the bottom of the drum, due to the action of moving blades, the collecting liquid refrigerant discharged from the top and side surfaces of the drum also greatly turbulence, which also increases the heat exchange coefficient between the drum wall and the liquid refrigerant and leads to an increase in performance.

Installation inside a cooled drum coaxially with rotation of the rotor with longitudinal loops

al The collector 8 is supplied with 40 tons of liquids, interacting with the internal refrigerant, and from the openings 9 in the form of jets is directed onto the inner surface of the drum and cools it. The spent liquid refrigerant is discharged from the cavity of the drum through pipe 10. When roller 1 rotates, the molten material in the form of a film crystallizes on the lower outer surface of the roller immersed in bath 5, with further rotation of the roller the material film is cooled and knife 7 is cut off from its outer surface. When the liquid refrigerant is supplied from the collector 8 in the form of jets to the inner surface of the drum 1jB of its upper and lateral parts, a film of liquid refrigerant flows into the lower part of the drum, and then

50

55

In this case, the surface of the roller makes it possible to intensify the heat exchange process over the entire surface of the roller. As the rotor rotates due to the mechanical TO of the blades on the liquid coolant and the surface of the roller, the liquid film of the liquid coolant is turbulized on the surface of the roller. This ensures the maintenance of a constant film flow regime of the liquid refrigerant agent on the upper and side surfaces of the drum, as well as the constant replacement of this film due to removal of the blades of the waste liquid film from these surfaces of the drum and the formation of a new film fluids from the reservoir holes on these surfaces ..

five

0

five

In this case, the surface of the roller makes it possible to intensify the heat exchange process over the entire surface of the roller. When the rotor rotates due to the mechanical TO of the blades on the liquid coolant and the surface of the roller, turbulization of the liquid coolant film formed on the surface of the roller occurs. This ensures the maintenance of a constant film flow regime of the liquid refrigerant on the upper and side surfaces of the drum, as well as a constant replacement of this film due to removal of the blades of the waste liquid film from these surfaces of the drum and the formation of a new film due to the supply of liquid jets from collector holes on these surfaces ..

Due to the fact that the re-directed from the collector to the inner surface of the drum of the liquid refrigerant jet does not prevent the waste film from being heated, the liquid rotor discharge from the surface is significantly reduced, i.e. increases the efficiency of the mold during operation. At the same time, the maximum possible temperature pressure (the difference between the temperature of the surface of the roller and the temperature of the liquid coolant) is also created on these surfaces of the roller. Due to this and turbulence of the liquid refrigerant film due to the impact of the rotor blades, the coefficient of heat transfer to the liquid refrigerant increases and, consequently, the productivity of the mold increases.

In the lower part of the drum, due to the mechanical action of the blades on the liquid refrigerant, intensive mixing (turbuliating) of the liquid refrigerant coming from the upper and side walls of the crystallizer occurs, which also increases productivity, since the laminar movement of the liquid refrigerant caused only by the rotation of the roller itself , goes under the mechanical action of the blades with a coolant and a wall in a turbulent motion.

The implementation of the rotor in the form of two discs connected by racks on which longitudinal blades of elastic material are mounted, ensures sufficient rigidity of the rim.

50

50

0

five

Structures of the entire rotor, facilitate its design and smoothly supply liquid refrigerant in the form of jets to the inner surface of the drum.

The blades are made of an elastic material, which provides the necessary density between the inner surface of the drum and the blades, which ensures the formation of a film of liquid refrigerant of a given thickness and effective removal of the spent liquid film, as well as significantly reducing the resistance to movement of the rotor (additional drive power) and improve accuracy manufacturing design.

Claims (1)

Invention Formula A roller mold, including a rotating roll cooled from the inside, immersed by the lower part in a bath with molten material, is a knife for removing hardened material from the surface of the drum, characterized in that, in order to increase productivity by providing uniform cooling throughout the drum and increasing heat transfer and efficiency by reducing the coolant flow rate, the drum is equipped with a rotor mounted in rotation with it and made in the form of two disks connected by struts E, which are mounted on the longitudinal blades of elastic material, interacting with the inner surface of the drum. / melt B sixteen QUB.Z