SU948391A1 - Roller-type crystallizer - Google Patents

Description

(54) ROLLER CRYSTALLIZER

one

The invention relates to chemical engineering, in particular to devices for the crystallization of melts and solutions of organic and inorganic substances.

A roller mold is known, including an internally cooled drum, a molten bath, a melt supply system, a roller rotation drive, and a knife system for cleaving the crystallized product 1.

The capacity of such a mold over the crust of the crystal layer, for example, with a thickness of (2-5) 10 m decreases due to the impossibility of increasing the angle (v) of the immersion of the drum in the melt to more than D, 5 1, 8 rad. For the same reason, it is not possible to improve the performance of the crystallizer in winter conditions of operation when the temperature of the refrigerant decreases. An increase in the frequency of rotation of the drum in winter conditions leads to an increase in the productivity of the crystallizer, however, in this case, the electric power consumption for rotating the drum and cutting is crystallized: the thickness of the product is smaller, for example, less (2-5) ..

The aim of the invention is to increase the productivity of the mold and reduce energy consumption.

The goal is achieved by the fact that the mold, which includes a cooled iz-. The inner drum, the melt bath, the melt feed system, the rotation drive of the roller, and the idling system for chipping the closed product, according to the invention, are equipped with at least one distribution pipe c. nozzles located outside the drum parallel to its generator and connected to the melt supply system.

It is advisable to provide the mold with a fitting for the cooled gas, install the distribution pipe with the possibility of angular displacement relative to the drum and provide it with a heat-exchange jacket.

Claims (4)

FIG. 1 shows the proposed mold, cut; in fig. 2 - view A of FIG. one; in fig. 3 - section bb FIG. 1. The mold includes cooling the inside of the drum 1, driven by an individual drive; Bath 2, on which the cover 3 is installed; knife system 4; heated distribution pipe 5 with nozzles 6 installed in the bosses 7; guides 8 for positioning pipe 5 in the desired position relative to roller 1; The nozzles 9 and 10 of introducing the initial melt into the pipe 5, the cooling gas inlet fitting 11, the outlets of the crystallized product exit 12, the gas output fitting 13, fittings 14 and 15 of the heat transfer inlet and outlet 14, respectively, coil 16, flexible pipes 17 in the form of rubber hoses. The mold operates as follows. The hot source melt continuously enters through the cylinder 9 into the bath 2 and the socket 10 into the pipe 5. On the outer surface of the drum 1 immersed in the melt cooled with a coolant from the inside, a layer of crystallized product forms during its contact with the melt. When this roller leaves the melt, the resulting crystalline layer entrains the liquid film, onto which a supercooled melt is deposited through a tube 5 which contacts the flowing film of the supercooled melt. During the time of interaction, the dissolution of the melt or the flowing supercooled film with the liquid film of the melt entrained by the roller forms a layer crystallized from the product, which is further cut off with knives. This product is discharged through nozzle 12. Precoated gas is fed through nozzle 11 (or several such nozzles) into the sprayed melt application zone, which is subsequently removed from the crystallizer through nozzle 13. Pipe 5 with nozzles 6 is installed with angular displacement relative to the rollers along the guides 8. The nozzles b mounted in Bobnik 7 are heated with coolant supplied to the heat exchange jacket of the pipe 5. Due to the supply of cooled gas to the flame of the sprayed melt, as well as The increase in the immersion angle of the roller into the melt provides an increase in the productivity of the mold. It is possible to install several pipes 5 with nozzles 6 along the surface of the drum 1 of the mold. In this case, maximum heat removal from the crystallization zone is achieved, and its productivity increases. Adjusting the if angle over a wide range, for example, from 0 to 3.8 rad, due to the angular displacement of the distribution pipe, allows for obtaining a crystal crust of the required thickness to control the output depending on the temperature of the incoming refrigerant (for example, for summer and winter operating conditions) roller speeds than energy savings. The implementation of the distribution pipe and nozzles heated provides non-beat and stable operation. The proposed crystallizer can find application in the chemical and related industries. The expected economic effect from the introduction of such a crystallizer in the production of sulfur alone will be at least 30 thousand rubles. per year on one machine. Claim 1. Roller mold, including internally cooled roll, melt bath, melt supply system, roll rotation drive, knife system for cleaving the crystallized product, which in order to increase productivity and reduce energy intensity, it is equipped with at least one distribution pipe with nozzles, locations outside the drum parallel to its generator and connected to the melt supply system. 2. A crystallizer according to claim I, in which it is provided with fittings for cooling gas. 3. The mold on the PP. 1 and 2, that the distribution pipe is installed with the possibility of angular displacement relative to the roller. 4. The mold on the PP. 1-3, in which the distribution pipe is provided with a heat exchanger jacket. Sources of information taken by the EO attention in the examination 1. Matusevich LN Crystallization from solutions in the chemical industry. M., Himi, 1968, p. 188-189 (prototype). fff.f -f / 7ff e / 7 / fj 0 0t / f.l