SU1162087A1 - Device for separating crystals from parent solution - Google Patents

Description

The invention relates to the field of separation of inhomogeneous liquid systems, namely, devices and apparatus for the separation of suspensions, and can be used in chemical, microbiological, food, and other related industries.

A device for separating suspensions is known, comprising a cylindrical part of the body with a tangentially located pipe for introducing suspensions, a conical bottom and pipes for introducing clarified liquid and sludge * The principle of this device is based on the use of centrifugal forces of a rotating suspension stream *

A disadvantage of this device is incomplete extraction of solid

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containing perforated inner shell with a pipe to enter the suspension, the outer shell with a pipe for outputting the liquid phase, a wheel with blades. mounted for rotation, a pipe and a partially closed casing, characterized in that, in order to increase the efficiency of the process by reducing the final the moisture content of the product, the internal perforated shell is made in the shape of a truncated cone, located on a smaller base downwards, the wheel with blades on the underside along the whole generatrix is made with a collar, and the sleep tube wife at the bottom of the pocket to the fluid.

liquid phase and high moisture content in the sludge, low separation efficiency *

It is also known a device for separating a suspension in a field of centrifugal forces, comprising a perforated shell with a nozzle for introducing a suspension and an outer shell with a nozzle for outputting a liquid phase.

The disadvantage of this device is the clogging of the hole of the perforated shell crystals, low efficiency of the separation process.

A device for separating crystals from the mother liquor, containing an inner cylindrical perforated shell with a pipe for introducing suspensions, an external shell with a pipe for outputting the liquid phase, a wheel with blades, is known.

Gu £ 8,02911 "718

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rotary, rotary, rub "; bu and partially closed housing. At ¹ this forms a closed swirling" gas flow, which, in contact with the liquid, becomes saturated, and since the gas flow is closed and saturated, the air temperature becomes equal to the temperature of the solution, overcooling and oversaturation of the solution does not occur and thus prevents the solution from crystallizing on the perforated shell, and hence its clogging.

The disadvantages of the described device "(5) can be attributed, firstly, to the rapid quenching of the twist of the suspension flow, as a result of which, in the lower part of the cylindrical perforated both" seagulls, "20 secondly, a zone is formed at the outer wall of the pipe, which is not subject to the influence of the gas flow, and the mother liquor droplets that fall on it 25 flow down and are removed together with the crystals *

As a result, there is not a “complete separation of the crystals from the mother” of an exact solution, the efficiency of the process’s βθ is low due to the high wetness of the final product *

The aim of the invention is to increase the efficiency of the process of separating crystals from the mother liquor by reducing the moisture content of the course product.

This goal is achieved by the fact that in the device for separating chrys. ”'Talls from the mother liquor, containing“ a seagull that feeds the inner perforated both ”seagulls with a branch pipe for suspension inlet, an outer shell with a branch pipe for outputting the liquid phase 45 ”, a pipe and a partially closed casing, according to the invention, an internal lane ~. , the forged shell is made in (the shape of a truncated cone located ного down the smaller base, the wheel. with blades on the lower side along the whole generatrix is made with a flange, and the pipe is provided in the bottom with a pocket for the liquid * Due to the fact that; internal perforated shell is made in the shape of a truncated cone, located a smaller base down, the area of free section between the inner conical perforation "

The reduced shell and the cylindrical pipe decrease in the course of the flow, there is no decrease in pressure at the walls of the shell, and the humidity of the final product decreases. Since the wheel with blades from the bottom hundred "rona has a collar along the whole forming line and a liquid frame is made in the lower part of the pipe, the possibility of the mother liquor entering separated crystals is excluded * As a result, the humidity of the final product also decreases *

The drawing schematically shows the proposed device *

The device contains an internal conical perforated shell 1, ending at the bottom with a solid pipe 2, in the upper hour "ti of which is a conical both" gull 3 with a lid 4 and a pipe 5 for feeding the suspension * The engine 6 is drunk in the lid of the cre the wheel 7 with the flange 8, performed over the entire generator. In the center of the device, a cylindrical tube 9 is installed coaxially conical with both "seagull 3", in the lower part of which you have a pocket 10 with a branch pipe 11 for draining the mother liquor. perforators This shell 1 is fixed to the outer shell 12 and both are covered with a casing 13. The casing is hermetically closed with the top cover Ί4 and the bottom cover 15. To the bottom cover 15 a pipe 16 is attached to unload the crystals. Discharge of the mother liquor occurs through fitting 17.

The separation of crystals from the mother liquor in the proposed device is as follows *

The initial suspension through the nozzle 5 is fed, into the conical shell 3 and by gravity enters the gap between the inner conical perforated shell 1 and the rotating wheel ~ 7. The air is twisted by the wheel 7, picks up the suspension, which also acquires a twisted “roaring movement”. The resulting centrifugal force, when the gas-liquid flow rotates, creates an increased pressure ~ at the wall of the conical perforated “shell 1, due to which the liquid phase is pressed through the holes, is collected in the shell 12, from which it is removed through fitting 17 * Po ~

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Since the inner perforated shell 1 is made in the shape of a truncated ·· cone located by a smaller base downwards, the free cross section area between the inner conical perforated shell 1 and the dihedral pipe 9 decreases in the course of the flow. Since there is a decrease in the free cross-sectional area, the pressure at the wall of the conical perforated shell 1 is not reduced due to the fact that part of the air flow passes through the perforation of the inner shell. Due to the fact that the suspension constantly over the entire height of the inner conical perforated shell 1 is affected by pressure from the gas flow, the moisture content of the final product decreases. and due to the centrifugal seep, it is thrown into the main current, the current located on the inner conical of the perforated shell:!. The design of the wheel 7 with the flange 8 makes it possible to reduce the probability of the suspension getting on the outer surface of the pipe, 9.9 To eliminate the danger of mother liquor falling on the outer surface of the pipe into the crystals, a pocket 10 is installed in the lower part of the pipe 9. The mother liquor collected in pocket 10 is discharged from it through the pipe 11 into the shell 12 "As a result, the humidity of the final product decreases .

Part of the air passes along with the liquid through the inner conical perforated shell 1, enters the shell 12, then goes out in the upper part of the shell 12 and enters the space between the wall and the sealed casing 13 with the covers 14 and 15 "From here the air passes through the passage 15 between the bottom cover 15 and pipe 2 enters the lower end of the pipe: 9. The other part of the air flow passes between the conical perforated shell and the pipe and is also sucked inside the pipe. ”The air passes through the pipe below Ever, then twists and takes part in the separation process again.“ The air flow closes ”The individual crystals 25 slide down the conical walls perforated shell 1 and are discharged through the conical tube 16, 'and the mother liquor is removed through fitting 17.

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The use of the proposed device will improve the efficiency of the process of separating crystals from the mother liquor by reducing the moisture content of the final product by 50%.

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Claims (1)

<claim-text> DEVICE FOR SEPARATION OF CRYSTALS FROM THE CELLULAR SOLUTION, </ claim-text> </ li> </ ul>