SU574237A1 - Tubular centrifuge for clarification of suspensions - Google Patents

Description

one

The invention relates to equipment for the separation of liquid inhomogeneous systems using centrifugal forces and can be used in the food, chemical, microbiological and other industries.

A known tubular centrifuge for clarifying suspensions, comprising a rotor with drain channels in the bottom, a cylinder inside it with a longitudinal slit and spring-loaded scrapers, feeding a tube, in the upper part of which the rods are placed. A stationary cylinder is mounted inside the rotor concentrically above the drain channels. Spring-loaded scrapers are fixed in the hinged supports on the cylinder and interact with the rods.

The disadvantages of such a centrifuge are relatively low productivity and unreliability of the scrapers, due to the fact that at the time of cleaning the rotor from sludge, there is a high pressure on the scrapers of the entire mass of fluid and sludge inside the rotor, causing significant stresses in its elements. This circumstance limits the practically possible thickness of the fluid layer in the rotor, i.e. it limits the centrifuge capacity.

In order to increase productivity and reliability in the proposed tubular centrifuge, the scrapers are rigidly fixed on the cylinder, and the latter is mounted hinged over the sludge channels and connected to one of the levers, and in the lower part

the rotor is a hinged branch pipe for the liquid phase of the sludge connected to another lever, and the drain channels for the sludge discharge are made in the form of half-ring slots, and inside the supply tube between

rods placed diaphragm.

FIG. Figure 1 shows schematically a tube centrifuge according to the invention for clarifying suspensions; in fig. 2 is a section along A-A in FIG. 1, unload time

draft; in fig. 3 is a section along BB in FIG. 1, centrifuging time.

The centrifuge tube includes a rotor containing the cornea 1, the bottom 2 and the cover 3. The cover 3 has openings 4, and the bottom 2 -

drainage channels 5 for discharging the centrate and sediment respectively. In the housing 1 of the rotor above the drain channels 5 in the racks 6 and 7 with the help of the axis 8 and the pipe 9, which serves to drain sludge, the cylinder 10 is hinged

with scrapers 11 and 12 fixed on it along the perimeter of its longitudinal slit 13. A lever 14 is attached to the axis 8 of the cylinder 10, which interacts with the rod 15 and with an elastic element 16 fixed to the support rod 17,

mounted on the supply tube 18. In the rotor case i in racks 19 and 20 on the axis 21, the branch pipe 22 is pivotally mounted. The tube axis 21 has a lever 23 that interacts with the rod 24 and the elastic element 25 mounted on the support rod 26 mounted on the supply tube 18. A diaphragm 27 is placed in the supply tube 18 between the rods 15 and 24. The supply tube 18 is equipped with a nozzle 28. A stop 29 is mounted on the rack 19.

The centrifuge works as follows.

In the process of clarifying the suspension is fed into the rotating rotor through the supply tube 18 through the nozzle 28 under pressure, which leads to the extension of the rods 15 and 24. The rods thus act on the levers 14 and 23 and, overcoming the forces of the elastic elements 16 and 25, press the discharge tube 22 as far as the stop against the stop 29, and the cylinder 10 with the scrapers 11 and 12 against the stop against the rack 6. The suspension, flowing through the rotor, is clarified. The centrate flows through the holes 4.

After accumulation of sediment, the suspension is stopped. As a result, the pressure in the chamber of the supply tube 18 drops, and the elastic elements 16 and 25 turn the discharge tube 22 and the cylinder 10 towards the draft. The outlet tube 22 is introduced into the sediment earlier than the scrapers 11 and 12 due to the hydraulic resistance of the diaphragm 27. The liquid part of the sediment flows from the rotor through the outlet tube 22 and the drainage channels 5. Under the action of hydrodynamic pressure, the thicker part of the sediment enters the space between the scrapers 11 and 12 and through the longitudinal slit 13 into the cylinder 10, from where it is discharged under the intake through the nozzle 9 and the drainage channels 5. After unloading the sediment, the suspension is resumed and the cycle is repeated.

The presence of an outlet tube and a cylinder with scrapers, hinged above the drain channels and driven by brushes mounted in the supply tube and separated by a diaphragm, provides separate drainage of liquid and thicker parts of the sediment under pressure, which allows to increase the thickness of the sediment layer. This achieves a significant reduction in the force perceived by the scrapers and increases the rate of sediment removal from

rotor.

Claims (1)

Invention Formula A centrifuge tube for clarifying suspensions containing a rotor having a bottom drain channels located inside a cylinder with a longitudinal slit and scrapers, feeding tube, in which rods interacting with spring-loaded levers are located in the upper and lower parts, in order to increase productivity and reliability of operation, the scrapers are rigidly fixed on the cylinder, the latter being hinged above the drainage channels for the sediment and connected to one of the levers, and in the lower part of the rotor a branch pipe for the liquid phase of the sediment connected to another lever is hinged, the drain channels for the withdrawal of sediment are made in the form of semicircular slits, and inside the feeding tube between the rods there is an aperture. 3 23 26 P 22