SU1685478A1 - Continuous crystallizer - Google Patents

Abstract

The invention relates to the instrumentation of the crystallization process from solutions and may find application in the chemical, food and other industries. The purpose of the invention is to reduce the dimensions of the mold and ensure safety in explosive rooms, as well as automatic switching of the three-way valve. The drive includes a cylindrical chamber, on the central shaft of which a radial blade is fixed and the radial partition is rigidly fixed on the chamber wall. The stationary partition and the movable blade form two cavities in the cylindrical chamber, each of which is equipped with a fitting with a three-way valve for alternately supplying and discharging the cold carrier. The drive shaft outside the apparatus is equipped with a lever that interacts with a relay and a microswitch that switches three-way valves, ensuring reversibility of movement. 1 hp f-ly, 3 ill.

Description

The invention relates to instrumentation of the crystallization process from a solution and can be used in the chemical, food and other industries.

The purpose of the invention is to reduce the size of the mold and ensure the safety of work in hazardous areas, as well as automatic switching of the three-way valve.

The invention is illustrated in the drawings.

FIG. Figure 1 shows schematically a general view of a continuous crystallizer (vertical section); FIG. 2 is a view along arrow A in FIG. one; on fig.Z - section of the housing on bb of figure 1.

The mold contains a lower base 1, which has a spherical surface, in the center of which a concave part 2 is fitted with a thrust plate 2, and a heated conical unloading device 3, terminated by fitting 4, is provided on the outer convex surface. The hollow elements 5, mounted one on another, cooled from the inside and made in the form of double-coven lenses with holes in the center, and the ends angled up around the perimeter 6. Between the spherical surfaces of each hollow element, an external welded element is installed and welded cylindrical shell 7, on which there are two nozzle 8 and 9 for inlet and outlet coolant. The inner shell 10 is mounted concentrically to the outer shell and is designed to evenly distribute the coolant inside the hollow member.

The mold also contains sealing rings 11 located between adjacent hollow discs assembled into a single package by means of straps 12, sectional agitator 13, pomeo

00 SP

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with

between the two adjacent and mouse-like elements, equipped with a perforated disk 14 mounted obliquely in a horizontal plane.

The top cover 15 of the mold has a spherical surface, in the center of which is placed an elastic ring 16, and on the periphery - fitting 17 for supplying the initial solution inside the mold.

On the upper base, in the center, a ring-shaped bobble 18 is welded onto which the drive 19 of the mold is fixedly mounted and the annular boss is rigidly fixed by means of bolts 20.

The drive of the mold soy goyi g lg cylindrical shell 21 to the bottom:: the bottom of which is welded; There are 2 holes with a hole in the center for the shaft 23, and the upper mountaineer is clamped with an ulon 24, on which the base 25 is installed with a hole for the passage of the drive shaft and a boring ring for the sealing ring 26 The upper support is attached to the flanges 24 by means of bolts 27.

Inside the cylindrical shell, a radial partition 28 is installed under-the-bottom, and on the outside, symmetrically to the radial partition, there is a bottom of the 20 and 30 head for supplying and discharging the cooling capacity € /.

To the drive shaft 23 of the cylindrical shell 21 passing by the center B, the movable blade 3 I is rigidly attached, which movably contacts the inner surface of the cylindrical shell with the lower base 22 and the upper base 25, while the vertical end of the partition 28 is movable is in contact with the drive shaft 23. On the free end of the drive shaft, on the 32-pole 32 there is a lever 33 in contact with the microswitch 34, fixedly mounted on the upper base, which gives a signal for switching the three-way distribution - gel valve 35.

The outlet manifold 36, terminated by fitting 37, is intended for a guaranteed filling with the internal cavity of the crystallizer and a continuous release of the suspension formed in the lower part of the crystallizer, and the collector 38 for transferring the fluid from one element to another.

The heated device 3 is equipped with a fitting 39 for supplying a heat transfer medium to the jacket and a fitting 40 for discharging the spent heat transfer fluid.

The discharge manifold 36 is equipped with a jacket 41 and fittings 42 for supplying heat

carrier and 13 GOAL of waste heat carriers.

The mold works as follows.

The best solution of the initial product is fed from the internal cavity of the crystalline through the nozzle 7, and the coolant is supplied through the unyjep 8, followed by the flow from: -H f M.-PE -1 i „jiffv.3H i -n г - ,., Lecturers of the CL dc of the disc itself itself, and then through a pin 9 uA up to the state of the krygtallis oz oa.

At the same time npvirjofliion chal with scrapers MPiiTwu.aMt I enpej V.nno perform reversible / P ,, 1g.; Pie around the vertical axis nl / 60-270 due to the alternate feed of hkads os - e /. least three-way races

pre (; litely-: s cl

m. ptutsery29,30 into the cavity of the central shell, divided on the 1n, and the beer cavity by means of a fixed partition, and fixed on the inner surface of the cylindrical shell and the movable blade fixed on the shaft.

Saturated raspor itg-ns is vigorously stirred inside the crystallizer sectional / 1 meal, am,. returning -; oopupotel, nne movement, providing good conditions for the heat exchange between the valuable solution and the heat-dissipating surfaces of the disios, while the scrubbers located on the sectional section; y, constantly cut off the solid sediment that forms at the heat and mass transfer boundary.

By measuring the passage of pacrsopa to form crystals, the solution is more and more cooled, this contributes to a further crystal core. Cope crystals obtained on the lowest element enter the heated conical discharge device 3, which is slightly heated, which prevents the formation of a solid sediment on its walls. and overgrowing of the outlet in the outlet manifold 36. Then, the crystals, together with the liquid phase in the form of a suspension, are removed through the fitting 37 outside the mold.

Drive mold works as follows.

The coolant from the discharge line is supplied from the crystallizer to cool the disks through the nozzle 8 (see Fig. 1) on the lower disk, then, sequentially flowing from the disk to the disk, it reaches the upper disk equipped with a drain nozzle 9. after that, the spent refrigerant.

coming out of the upper disc, is fed through pipeline E (see fig. three-way distribution valve 35, connected via fitting 29 to the pressure chamber of the hydraulic cylinder B.

The spent coolant, when it enters the cavity, acts on the movable blade 31 rigidly mounted on the drive shaft 23, moving it clockwise until the movable blade 31 touches the fixed partition 28 rigidly fixed to the cylindrical shell 21, while the lever 33 (see Fig. 2) presses the microswitch 34 and switches the three-way distribution valve 35. After that, the spent coolant flows through the nozzle 30 into the cavity D, and the cavity B is connected through the nozzle 29 and the valve 35 with the drain valve The guide pipe along the arrow J and the blade 31, rigidly fastened to the drive shaft 23, will move counterclockwise until the lever 33 contacts the microswitch 34 (see Fig. 2) on the other side and switches the three-way distribution valve 35 to reverse . Thus, the spent coolant is continuously supplied through channel E (see FIG. 3) to a three-way distribution valve, and from channel F is continuously diverted to a discharge. In this case, the blade 31, enclosed in the cavity of the cylindrical shell 21, performs a continuous return-translational motion.

It is not necessary to use the coolant as hydraulic energy to rotate the drive shaft. Other working fluids can be used, but the most economical from the point of view of consumption of pipelines, fittings, to use a coolant.

The rotation of the drive shaft from the hydraulic energy of the fluid (in this case, the exhaust coolant) is constructively simpler and more compact than an equivalent electric drive. This is ensured by the fact that the hydraulic actuator is installed directly on the upper base 15 (see FIG. 1)

and combined with the drive shaft 23 of the mold, on which the scraper agitators are fixed. In addition, it should be noted that the drive shaft of the mold 5 must rotate at low speeds, and the hydraulic transmission ensures that this condition does not require any gearboxes.

The electric drive for the mold requires the installation of a gearmotor connected by means of a clutch with a cylindrical gearbox, and then through a clutch with a drive shaft, all of which are structurally converted into large dimensions along the height of the mold. There are no elements in the hydro5 drive design that cause a spark to appear during operation. In this case, the hydraulic energy of the coolant is not explosive and non-flammable.

Claims (2)

1. A continuous crystallizer, including a body with a lid, heat exchange elements mounted one above the other, between which there are 5 agitators with scrapers fixed on the drive shaft, a device for rotating the shaft, and a system for supplying and withdrawing a solution and suspension, characterized in that, in order to reduce the dimensions of the crystallizer of the torus and ensure safety of work in explosive rooms, the device for rotating the shaft cylindrical chamber mounted on the housing cover, inside which is rigidly 5, a radial blade is attached to the drive shaft, and a radial partition is attached to the chamber wall, with the partition and blade forming two cavities in the chamber, each of which has a feed system and 0 output of the working fluid containing fittings, symmetrically located relative to the overheating, three-way valves. 2. The mold according to claim 1, which is so that, in order to automatically switch the three-way valve, the drive shaft outside the mold is equipped with a lever and a microswitch, giving a signal to switch the three-way valve. 4s    / ± ± r r ± -, rrcr - rЈ: r-f-Rj t-A VTS and J fvTW ", & FTTK fe f-Jj / jj-LELj-DG .SI Ж rjl,, yJa -. «.. i j A-4i / Ti-M-jst-. S:  yes / 1 / s3A / i / r: /, §Ш /  § jin / a i / i. i i / ill; ; / P, l / 1 ™ X / n7 k / 8 iiii J I f i 1 I .i I t / s i3i -4 --- HRN  , fev i vj: v, 4 KK , 3 fe J CVj „E  cy, 4S 5-5 Fig 2 35 y