SU1093364A1 - Gravity air classifier - Google Patents

Abstract

GRAVITATIONAL PNEUMATIC CHAIN CLASSIFIER containing a separation chamber consisting of series-connected sections, each of which has transfer elements, loading and unloading devices, an insert installed between the pouring elements, characterized in that, in order to simplify its design and reduce costs energy by eliminating moving mechanisms, inserting them in the form of a helical surface formed by a series of rods fixed to the axis position changes relative to each other.

Description

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1 The invention relates to the classification of bulk materials in a delightful air stream and is intended to separate materials of a size of not more than 10 mm into two products on a 5-0.001 mm boundary grain. The invention can be used to fractionate the enrichment of bulk materials in mountainous, chemical, metallurgical, construction and other sectors of the national economy. A gravitational pneumatic classifier is known, including a separation chamber, filling devices made of separate rings, loading and unloading devices Ij. The disadvantage of this device is the low productivity and quality of separation. A gravitational pneumatic classifier is also known, which includes a separation chamber, coCTOKfoyia from successively midrange sections between each other with HbiMH crossbars and distribution grid located below them. Loading and unloading Lenidos. The disadvantage of this classifier is the low air flow velocities in the separation of fine poropzhs (d 200 μm). The closest to the invention to the technical essence and the achieved result is a gravity pneumatic classifier, including a separation chamber with sections consisting of successively interconnected sections, in each of which there are transfer elements, loading and unloading devices, an insert installed between the pouring el ements The disadvantages of the known classification are the complexity of the design, the low durability of the rotating gratings due to the rapid wear when rotating with a sieve, increased maintenance costs during operation compared with devices that do not have rotating parts. The purpose of the invention is to simplify the design and reduce energy costs by eliminating moving mechanisms, 642 The goal is achieved by the fact that in the gravitational pneumatic classifier containing a separation chamber consisting of sequentially connected sections, each of which has pouring elements, loading and unloading devices, insertion, installed between the elements of the transfer, the insert is made in the form. a screw surface formed by a series of rods fixed on an axis and installed with the possibility of changing position one relative to another. On 4ig. I presents the classifier, a general view; in fig. 2 - section with a screw surface, axometry, gravitational pneumatic: the classifier consists of a separation chamber 1 assembled from series-connected sections 2; with cone-shaped pouring elements, under which sections 3 are installed with a screw surface, chutes 4 of a fair material of bunkers for coarse and fine products, a fan for creating an oriental air flow, air duct cleaning. , fan and cyclone are not shown in the drawing. The screw surface consists of axle nuts 6 rods 7. Axles 6 are used to fix rods 7 into a rigid helical surface. By turning the rods 7 around the axis 5, the pitch of the helical surface is established. The gravitational pneumatic classifier works as follows. The source material flows through the chute 4 into the separation chamber 1, where air is blown from the bottom by the fan. Large particles, entrained small ones, under the action of a gravitational force, descend towards the air flow downwards, and small particles rise upward by this flow. When particles pass through section 3, the particles, in addition to the gravitational force, act as a centrifugal force that forms when the air flow passes through the screw surface and draws large and border particles to the walls of chamber 1. At the same time

Claims (1)

GRAVITY PNEUMATIC CLASSIFIER, containing a separation chamber, consisting of series-connected sections, in each of which there are discharge elements, loading and unloading devices, an insert installed between the discharge elements, characterized in that, in order to simplify its design and reduce energy costs by eliminating energy movable mechanisms, the insert is made in the form of a helical surface formed by a series of rods mounted on an axis and mounted with the possibility of changing position relative to one another. SUn 1093364>