SU673314A1 - Settling centrifuge - Google Patents

Description

 J ..- The invention of ognosigs to the field of separation of liquids of heterogeneous systems, c. The power of centrifugal forces, namely, precipitation centrifuges, and can be used in the chemical, food and beverage industry. A known centrifugal centrifuge containing a rotor mounted on a vertical drive shaft, comprising a conical plate, mounted inside it a fairing and blades, a guide disk located under the rail, -and a body pan with a pipe for w, 1 sludge located under the guide the disk. -:,:. Said centrifuge is closest to the invention in its technical essence and the result achieved. In a known centrifuge, the discharge of sediment from the body pan through the outlet pipe is carried out by gravity, as a result of which the sediment does not undergo centrifugal compaction and contains a large amount of residual moisture, and the sediment itself is not reliably reliable. In order to increase the degree of sludge dewatering and improve its discharge, the centrifuge rotor is equipped with an additional plate located with a gap relative to the guide disk and connected to the main plate with the formation of windows for sludge discharge, the plates are installed with axially possibility. The movement is relative to the flap guide disk, and the latter is attached to the fairing, and the centrifuge is equipped with a device for supplying fluid into the gap between the guide disk and the additional plate. FIG. 1 shows the proposed centrifuge, axial section (BB in FIG. 2); in fig. 2 is the same cross section (A-A in FIG. 1). The centrifuge includes a housing 1 with a feed pipe 2, a receiver 3 sediment; when receiving 4 fugata and bearing knots

crowns 5 in which a drive shaft 6 is installed, as well as a rotor comprising a conical plate 7 with blades 8 and a central hole 9, a fairing 1O, a guide disc 11 with a center from version 12, rigidly connected to the fairing 1O through blades 13, and an additional plate 14 with a central hole 15 connected to the plate 7 by means of jumpers 16 and forming (with it a window 17 for unloading sediment), and with a guide disk 11 - a gap 18, which includes a pipe 19 for supplying a liquid. the disk 11 is rigidly fixed on the shaft 6, and the plate 7 and 14 are installed with the possibility of axial displacement relative to the disk 11..

The centrifuge works as follows.

When the rotor rotates through the pipe 19, a suspension is fed into the annular gap 18 between the disk 11 and the plate 14, which unwinds and fills it with centrifugal forces, creating a centrifugal hydrostatic pressure in it. Under the pressure of this pressure, the plate 14 moves away-In the axial direction of the dioke 11, pressing the plate 7 to the plate, and the windows 17 are blocked by the disk 11. From the pipe 2 through the hole 9, the initial suspension enters the vertical rotor, which fills. it first flows from the center to the periphery between the plate 7 and the fairing 1O, spinning the blades 8 to the angular velocity of the rotor, and then from the periphery to the center between the fairing 1-0 and the disk 11, returning energy to the rotor through the blades 13 .

Centrifugal sediment is precipitated from the suspension and accumulates at the junction of the plate 7 with the disk 11, and the clarified liquid phase through the holes 12 and 15 of radius y enters the receiver. 4, In this case, in the annular gap between the plate 7 and the fairing 10, an open surface of a suspension of a radius of 10 ° is formed by the action of centrifugal forces in this gap a centrifugal hydrostatic pressure develops, which creates an axial force, which tends to move the plate 7 away from the obstruction 63144

the transducer 10 and the disk 11. However, the geometry of the rotor is chosen in such a way that this force is less than the axial force developed in the gap 18 and the pressing plate 7 against the disk 11.

As sediment accumulates in the peripheral part of the rotor, its layer increases and closes the gap between the fairing 10 and the junction line of the plate 7 with the disk 11, the resistance to flow of the suspension increases, the radius of the free surface of the suspension in the gap between the plate 7 and the fairing 10 decreases, the axial force in this gap at some value of the free surface radius of the suspension, poS exceeds the pressing axial force, as a result of which the plate 7 moves away from the disk 11, the windows 17 open, and the sediment under the effect of centrifugal forces partially ejected into the receiver 3. At the same time, the sediment layer in the rotor decreases, the flow resistance of the suspension decreases, the radius of the free surface of the suspension in the gap between the plate 7 and the fairing 10 increases, the pressing force, which all the time remains constant, the stage stagnates more away, and the plate 7 is pressed against the disk 11 again.

Claims (1)

Invention Formula An oadactor centrifuge, comprising a housing with a supply pipe and collectors of separated phases, a rotor including a conical plate, a fairing on the blades installed inside it, and a guide disk, in order to regain an increase in the degree of dehydration sediment and improve its discharge, the rotor is equipped with an additional plate, located with a gap relative to the direction of the disk and connected with the main plate with the formation of openings for. unloading, the plates are installed with the possibility of axial movement relative to the guide disk, and the stems are attached to the fairing, and the centrifuge is equipped with a device for supplying liquid into the gap between the guide disk in the additional plate. y //////// y //// //// 7 // V / fJV /. 673314 .-