RU2167006C1 - Device for separation of mixtures - Google Patents

Abstract

FIELD: devices for separation of mixtures according to size of particles into two fractions, final grinding of coarse particles to passable sizes; grinding raw materials for formula feed. SUBSTANCE: proposed device includes loading branch pipe and bladed disk located under it. Blades are fitted on both sides of disk. Inner and outer chambers located coaxially relative to disk are provided with openings for escape of products. Calibration grate is fitted above disk for axial motion forming calibration slot between bladed disk and calibration grate. Part of calibration surface of grate is made in form of truncated cone. EFFECT: enhanced efficiency of separation; increased output of fine fraction of various size. 5 cl, 3 dwg

Description

 The invention relates to a device for separating mixtures according to particle size into two fractions and regrinding large particles close to the feed size, when grinding feedstock and other products.

 A device for separating mixtures [A.S. N 612717 C. B 07 B 7/083, 1978], including a loading nozzle, a disk located underneath with radial blades mounted on both sides of the disk, an inner and an outer chamber with product outlet openings located coaxially to the disk, with an inner chamber mounted above the disk with the formation of a calibration gap. The disk is mounted with the possibility of axial movement.

 The disadvantage is the inconsistency of the size of the calibration gap along the circumference of the disk during operation of this device. In the calibration gap, not only the separation of mixtures occurs, but also the grinding of particles close in size to the height of the calibration gap. Particles with a size close to the height of the calibration gap make it difficult to pass the fine fraction and wear out the calibration surfaces of the disk and the casing. This all leads to a decrease in the efficiency of the separation process. The installation of a disk with blades, which is connected with the drive, with the possibility of axial movement complicates the conditions of regulation and maintenance.

 The purpose of the invention is to increase the efficiency of separation and yield of fines, improving the conditions of adjustment and maintenance.

 This goal is achieved due to the fact that in the device for separating mixtures, including a loading nozzle, a disk located under it with blades mounted on both sides of the disk, the inner and outer chambers are located coaxially to the disk with openings for the exit of products, while the inner chamber is located above the disk , a calibration deck is installed above the disk with the possibility of axial movement and the formation of a calibration gap between the disk with blades and the calibration deck.

 Part of the calibration surface of the deck, located closer to the inner diameter of the deck, is made in the form of a truncated cone, so that the gap between the deck and the disc to the periphery is reduced. Along the perimeter of the disk from the deck side, the surface is made of increased roughness and wear resistance with a width greater than the width of the deck. On the conical part of the deck and along the perimeter of the disk from the side of the deck, radially grinding ribs are installed.

 The installation of a deck with the possibility of axial movement and the formation of a calibration gap between the disk with blades and a calibration deck that is not connected to the drive improves the conditions for regulation, maintenance, ensuring a constant size of the calibration gap along the circumference of the disk and increases the efficiency of the separation process. Creating a calibration surface of the deck, located closer to the inner diameter of the deck, made in the form of a truncated cone, so that the gap between the deck and the disk to the periphery decreases, installing radially arranged grinding ribs on the cone of the deck and the calibration surface of the disk, increasing the roughness of the surface of the disk forming the calibration gap, allows to grind particles close in size to the height of the calibration gap, and improves the passage conditions of the fine fraction.

 In FIG. 1 shows the proposed device, a General view; in FIG. 2 is the same, top view, in FIG. 3 - working area of the device.

 The device for separating mixtures consists of an inner chamber 1 with a loading pipe 2, a disk 3 with a calibration deck 4 installed above the disk 3, a drive 5 and a slit 6 formed between the disk 3 and deck 4. The disk 3 has symmetrically located upper and lower blades 7 and 8, grinding ribs 9 are installed on the periphery of the disk 3 under deck 4. Part of the calibration surface of deck 4, located closer to the inner diameter of deck 4, is made in the form of a truncated cone 10. On the conical part of deck 4, radially grinding ribs 11 are installed. Inner 1 and the outer 12 chambers are made in the form of a snail with exhaust pipes 13 and 14.

 The device operates as follows.

 The product enters through the receiving pipe 2 to the rotating disk 3, where it is accelerated by the blades 7 and, under the action of centrifugal forces, is sent by a thin layer to the periphery of the disk 3 towards the slit 6 formed by the surface of the disk 3 and the lower surface of the calibration deck 4. Particles of the product, which are smaller than the height slots 6 pass into the outer chamber 12 and blades 8 are discharged through the nozzle 14, and product particles larger than the slit 6 remain in the inner chamber 1 and are discharged through the nozzle 13 located above the slit 6. Passage iju particles of fine fraction through the slit 6 facilitates except centrifugal force as the aerodynamic pressure difference generated in the inner 1 and outer chambers at 12 movement drive 3. Installation deck 4 for axial displacement allows to obtain a fine fraction of different sizes. Particles that are close in size to the height of the calibration slit 6 are refined to the bore size using grinding ribs 9 and 11. Creating a part of the calibration surface of the deck 4 is conical, as well as giving the working surface of the disk 3 increased roughness, favors the regrinding of particles close to the passage size.

Claims (5)

 1. A device for separating mixtures, including a loading nozzle, a disk located beneath it with radial blades mounted on both sides of the disk, an inner and an outer chamber with openings for output of products arranged coaxially to the disk, while the inner chamber is mounted above the disk, characterized in that the device comprises a calibration deck mounted above the disk with the possibility of axial movement and the formation of a calibration gap between the blade disk and the calibration deck.  2. The device according to p. 1, characterized in that a part of the calibration surface of the deck, located closer to the inner diameter of the deck, is made in the form of a truncated cone so that the gap between the deck and the disk to the periphery decreases.  3. The device according to claim 1 or 2, characterized in that along the perimeter of the disk with blades on the deck side, the surface is made with increased roughness and wear resistance with a width greater than the width of the deck.  4. The device according to any one of claims 1 to 3, characterized in that grinding ribs are installed along the radius on the conical part of the deck.  5. The device according to any one of claims 1 to 5, characterized in that grinding ribs are installed on the conical part of the disk.

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