SU751833A1 - Settler for juices of beet-sugar production - Google Patents

Description

FROM the juice entering the settling tank, which consists of a cylindrical vessel and a spiral trough 2. located inside it. 2. -the separation of air and foam from the juice is located separately from the sediment; ::. The spiral trough of this device has a flat bottom. Before entering the settling tank, the sack is treated with a certain amount of anionic lolyelectrolyte (flocculant); 1 l of precipitation improvement. The juice is fed to the lower part of the settling tank through the central tube and distributed by a radially disk meter introduced into the zone of gentle stirring. The sediment is removed through the exhaust pipe on the bottom of the sediment accumulator, and the active phase goes away; to the upper part of the oiler, through the open circumference of the ring rail, and from the trough through the pipe to the plant. The removal rates of the clarified juice and the thickened slurry depend on the rate at which the juice arrives. The gap between the upper edge of the central tube for the flow of juice and the agitator disc is adjusted by moving the disc to the vertis.: Refer to the top of the sump through the rod connected to the disc. To the residuals in the construction of this settler is the unsatisfactory work of a separate rational device for separating air and foam from the juice. The separation of foam and air from the juice occurs in the spiral chute of the device with a flat bottom. The juice contains both finely dispersed pgl-mixes and heavier impurities in the sand saw. The speed of movement of the juice in the spiral chute is relatively small and heavier impurities settle, which causes a drift of the chute, the flow velocity increases towards the ground. as a result of which, small bubbles, and as a result of i-i, the yen will not be able to separate from the gokles, together with the juice, into the clarification zone of the settling tank. Allocated in this. -One. OCI cause flotation and entrainment of small l.spersiih particles together with the brightened phase. . yy, -: chg; et k; g: ostvo lightened oh (mouths hppo -degradability of the sludge pit. Ud ;; chm: 1- sludge from the device for separating air and foam from the juice is not provided. .wa gtoinika is also an uneven island of the entire surface of the mirror illuminated ..., 4.in. the mirror of the clarified phase with the help of an annular bluish-thrue ppm g., .- ba. With a large diameter of the sump it is almost impossible to make : oBiHTb overflow circumference of the gutter but horizontal. Uneven drainage over the entire circumference of the violation The hydrodynamics of juice movement in the settling tank causes turbulence of the clarified phase, reduces the capacity of the settling tank. The aim of the invention is to improve the quality of the juice being cleaned and to increase the productivity of the apparatus. in which are placed fittings for drainage of the juice of the juice, a cylindrical vessel of the device for separated air and nony from the juice is fixed in the lid of the tank around the tube, the bottom of the spiral Both formed conical and has a slot for the passage of sludge into the vessel, and truboval at a location within the vessel has a window for discharging the degassed osalka juice and the container. The bottom of the vessel is made cone-shaped and above it there are scrapers, with ashen to the pipe. Fittings consist of coaxial cylinders with a threaded connection for .-, d) their height. FIG. 1 shows schematically the proposed settling tank, general view; pas figs. 2 shows section A-A in FIG. I, a device for degassing juice; in fig. 3 shows the node I in FIG. 1, fitting with a telescopically varying height; in fig. 4 shows a section BB in FIG. I. partition with fittings. Sludge | Hc consists of a tank / cylindrical shape, to which the bottom and the cover of a conical shape are welded. At the bottom of the tank / on the conical bottom,,., .. v., U. ,,. when the scraper device 2 is located. attached to the rotating pipe d To the lower part of the conical bottom of the priv. -...., / j, or ijnci iijjiicren sediment drive 4 cylindrical shape with a flat bottom. At the bottom of the accumulator 4 there is a nozzle 5 for removal of sediment. In the upper part of the corpus a ring trough 6 is made with fittings 7 for collecting and withdrawing the clarified phase. The body of the apparatus throughout the cross section at the level of the upper edge of the annular gutter 6 is blocked by a partition 5 with openings 5 in which fittings consisting of two coaxial cylinders 10 and II with a threaded connection are installed on the side of the upper part of the partition. In the upper part of the sump there is a device for separating air and foam from the juice, consisting of a cylindrical vessel 12 and an annular spiral groove / located in the latter. Under the bottom of the spiral annular chute 13 there are scrapers 14 attached to a vertical pipe 3. The circular spiral chute is formed by the vessel wall 12 and cylindrical inserts / 5 with inclined partitions in the lower part, forming the bottom of the chute, having a truncated cone shape in longitudinal section. the bottom of the bottom along the entire length of the ti JirinC .rtVC both made a slit 16. In the spiral pipe 13, to move from one ring to

the other is made of windows 17 in the wall of cylindrical inserts 15, and the annular space along the entire height is divided by partitions 18.

A device for separating air and foam from juice is provided with a fitting 19 for supplying juice, a fitting 20 for exhausting air lii foam.

Windows 21 and 22 are provided in the pipework for the removal of the schopper ;; i for the removal of sludge. The pipe in the lower part is made with an extension 23 and a supporting disk 24 located below the expansion. The shaft is driven from gear 25.

The sump works in the following way.

The unclarified suspension (saturation juice) with air and the price enters the settling tank through fitting 19, passes through the annular spiral groove 13 at a low flow rate. In this movement, air and foam are separated from the suspension and discharged through fitting 20. Separated from air and foam suspension, the spiral chute, and its drain through the window 21, piped 3 into the cavity. Target impurities that have settled in the chute 13 fall through the slot 16 at the bottom of the vessel 12 and collected by scrapers 14 to the pipe 3, where through the windows 22 the pipes 3 are led out into the cavity 3. Then the suspension is lowered along the pipe 3, enters the annular gap between the expansion .; 23 and a supporting disk 24, radially distributed over the entire cross section, and enters the separation zone of the capacitance phases /.

In the course of operation, the level of the phase boundary is maintained above the zone of flow of juice into the settling tank, in which case, in addition to settling in the gravitational field of the gravitational forces, the suspension is filtered through a suspended layer of sediment formed during settling. The clarified phase is discharged through the chimneys installed in the openings 9 by a partition 8, and flows down the partition into the annular groove 6 and through fittings 7 is diverted into the technological scheme of the plant. The thickened sediment is continuously withdrawn from the settling tank through nozzle 5 Tube 3 and scraper devices 14 and 2 are driven into rotation from drive gear 25. A solution of anionic polyelectrolyte is introduced into the cavity of tube 3 at the top.

In the device for separating air and foam from juice, including a spiral chute, favorable conditions are created for the separation of air and yen in the stream at low speeds along the entire length of the chute. But since the saturation juice contains corrosive air, foam, fine particles and heavier particles in the form of sand, which in a stream at low speeds settle to the bottom of the trough, to avoid trough drift, the bottom is made with a slope cone-shaped in the longitudinal direction. cross section at the bottom of the entire length. Such a device

the bottom of the gutter allows continuous removal of p-settling particles into the lower part of the vessel of the air separation device and i; c; ibi or juice.

At the bottom of the vessel J2, the scraper device is mounted on a vertical shaft and is intended for the continuous collection of sediment trapped on the bottom. Next, the sediment enters the cavity through the holes made in its walls. Such a constructive solution when creating a device for separating air and foam prevents the spiral chute from slumping by sediment, thus ensuring stability of the device and preventing air and foam from entering the settling zone.

The presence in the apparatus of a partition with openings over the entire cross section of the housing of the apparatus with fittings of one height, installed in the openings from the side of the upper part of the partition, allows to select the clarified phase over the entire cross section.

In order to ensure uniform sampling of the hole, the fittings are made S with a telescopically varying height for installing their upper edges in the horizontal plane after the installation of the sump. The exclusion of air ingestion of foam into the zone of settling and uniform removal of the clarified phase over the entire cross sectional area of the apparatus significantly improves the hydrodynamics of the phase separation process, which makes it possible to intensify the clarification process with the use of flocculation (anionic polyelectrolytes) that increase the clarification rate time.

Improving the hydrodynamics of the phases in the apparatus makes it possible to carry out the deposition process together with the filtration of the clarified phase in the suspended sediment layer, which significantly improves the quality of the refreshed phase and eliminates its control filtration after clarification. 45 When a settling tank is used in comparison with the most efficient FILS filters, the economic efficiency is calculated from the reduction of initial costs, repair and depreciation costs, excluding 50 expenses for filter cloth. Additional funds are spent on floc nt. The economic effect of the use of a clarifier instead of FILS filters for a sugar factory with a capacity of 3000 g of beets per day is 47.4 thousand rubles. In case beetroot is processed into frostbitten and spoiled, the economic effect from the use of the responder increases dramatically due to the maintenance of a higher production capacity of the plant compared to other types of thickeners, which significantly reduce their productivity.

In this case, the efficiency of the use of the settler can amount to hundreds of thousands of rubles per sugar refinery of average capacity.

F o ip m lla inventions

Claims (3)

1. Sump for sugar beet production, containing a cylindrical container with a lid and a conical bottom, a scraper tool located above the bottom for removing sediment mounted on a vertical pipe, a circular annular groove fixed in the top of the container for collecting and removing clarified juice and an air separation device and foam from the juice, which is sucked into a settling tank, consisting of a cylindrical vessel and a rotary chute that is laid inside it, characterized in that, in order to improve the The quality of the juice being cleaned and the increase in productivity of the apparatus at the level of the edge of the gutter is installed a partition with openings in which the fittings are placed, and the cylindrical The vessel of the device for separating air and foam from the juice is fixed in the tank lid around the tube, while the bottom of the spiral trough is made like a j-shaped m: it has a slit for the passage of sediment into the vessel, and it has a port for discharged juice in the vessel and sediment in the tank. 2. A settler according to claim 1, characterized in that the bottom of the vessel is tapered and above it there are scrapers attached to the pipe. 3. The settler of claim 1, wherein the fittings consist of coaxial cylinders with a threaded connection for adjusting their height. Sources of information taken into account in the examination: 1. Azrilev1ich M. Ya- Technological equipment of sugar factories. M., Pishepromizdat, 1972, p. 130-132. 2. US patent No. 3523889, cl. 210-20, published. 1970 (prototype). L FIG. 2 iO ig.