SU1730468A1 - Device for dust control during discharge of loose materials into hipper - Google Patents

Abstract

This invention relates to mining promet. The goal is to increase the efficiency of dust suppression. For this, in the device, collectors with nozzles are fixed on opposite walls of the bunker in the plane of its cross section. Collector nozzles are made with flat-jet nozzles and mounted towards each other. The longitudinal axes of the nozzles are located at an angle of 0-15 °. to the plane of the cross section of the bunker, and flat-jet nozzles are set at an angle of 25-30 ° & to the same plane. Under the collectors on the walls of the bunker installed visors. When loading the hopper, the bulk material is wetted, crossing multi-layer water-blowing curtains formed by nozzles with flat-jet nozzles. At the same time, the dusty air displaced by the bulk material is brought to the opposite wall of the hopper. It is deflected by a visor and guided in conjunction with a water-air curtain. It is cleaned at a meeting point with an oppositely directed multilayer curtain from the collector nozzles placed at the opposite side of the bunker. This orientation of the nozzles and their flat-jet nozzles makes it possible to form and position the layers in the water-air curtain with the greatest effect for dust collection. 3 il. cl

Description

The invention relates to the mining industry and is intended to dedust the air when unloading bulk materials from transport vessels (dumpcars, etc.) into a bunker.

A device for dedusting bunkers, including suction of dusty air, followed by cleaning it in cyclones and fine dust collectors by means of two congruent air-pressure ducts is known.

However, in the known device, only aspiration of the dusty air is carried out, and not its dust removal.

Closest to the present invention is a device that provides a method for dedusting air when unloading bulk materials into a crusher receiving hopper, consisting in humidifying a dusty stream and settling dust by passing a dusty stream through a permanently irrigated grid. And then through a flare of dispersed water..The device includes a settling grid installed vertically in the receiving bunker along its longitudinal axis, a mobile platform with two spray guns mounted along its longitudinal sides E units,

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flexible aprons attached to the side walls of the mobile platform and lowered into the receiving funnel, switching and locking equipment.

However, the device is not sufficiently effective due to the possibility of the removal of part of the dusty air through the space dispersed by torches of dispersed water at the spray nozzles due to the fact that the grid is constantly irrigated, through which the dusty air must pass, has some aerodynamic resistance. In addition, the device is complex in design and in operation, since it can work only at positive ambient temperatures due to the freezing of a permanently irrigated grid.

The purpose of the invention is to increase the effectiveness of dust suppression.

This goal is achieved by the fact that in the air dedusting device when unloading bulk materials into a bunker, including collectors with nozzles and canopies installed in the bunker under collectors with nozzles, the collectors are fixed on opposite walls of the bunker in the plane of its cross section, and the nozzles of the collectors are made with flat-jet nozzles and are installed opposite one another, while the longitudinal axes of the nozzles are angled from, O to 15 ° to the cross-sectional plane of the bunker, e nozzles are at an angle of 25 30 ° to the same plane.

The proposed device is characterized by the arrangement of the nozzles to their flat-jet nozzles relative to the cross-sectional plane of the bunker.

FIG. 1 shows the device, a general view; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. 2

The receiving bin with the dedusting device includes a dumper 1 discharging into the bunker 2 with a crusher 3 located in its lower part, counter-directed multilayer water-air curtains 4, formed by collectors with nozzles 5 and 6 with deflectors 7 and 8 located under them. collectors with nozzles are buried 1 / 3-1 / 2 the height of the bunker and installed opposite to each other in such a way that the longitudinal axes of the nozzles are at an angle of 0-15 ° to the plane of the cross section of the bunker, and the nozzles are at an angle of 25-30 ° to this same plane about Ensuring the multi-layer curtain and increasing its thickness (from h to H, the canopies also have a 45 ° slope to the horizon

for smoother entry of dust air into the curtain.

The device works as follows.

A stream of dusty air 9, displaced by material 10 being loaded into the bunker and air ejected by this material, is carried along the opposite wall of the bunker. At the same time, the feed material, crossing the curtain 4, formed by the collector with the nozzles 5, is moistened, reducing dust generation. The deflecting visor 8, eliminating the wall effect, directs the dusty

the flow9 is a way of a water-air curtain formed by a collector with nozzles 6. For a smoother entry of a stream of dusty air 9 into the plumes of a water-air curtain 4, the visor has an angle of inclination to the horizon

45 °, and the axis of the injectors - 0-15. A water-air jet, which has the ability to draw air from the environment, prevents dust particles from escaping from the jet. Moving in tandem with the air-water plumes of the multi-layer curtain, the dusty air is partially cleaned by dust particles settling on the water droplets. The final cleaning takes place at the venue of the water-air curtains, where the flows are turbulent and

the likelihood of contact of dust particles with water droplets increases. A multi-layer curtain is created to increase its thickness (from h to H) in order to more effectively absorb a stream of dusty air-9 and

reducing the likelihood of breaking it through the veil. This is achieved by positioning the nozzles at an angle of 25-30 ° to the plane of the cross section of the hopper.

When unloading the dump car from the other side

The bunker (Fig. 1) of the curtain 4 formed by the collector with the nozzles 6 pre-wets the material to be discharged, and the cleaning of the dusty air flow 9 deflected by the visor 7 is carried out in the water-air curtain 4 formed by the nozzle 5.

Carrying out fine dust and water droplets outside the bunker into the surrounding space, for example, under the action of wind,

Preventing buried collectors with nozzles at 1 / 3-1 / 2 of the height of the hopper.

A device that provides dedusting is not difficult in design (it has no moving parts), and in operation. Dusting can be used with negative temperatures, i.e. all year round in any climatic zones.

Claims (1)

Invention Formula A device for dedusting air when unloading bulk materials into a bunker includes collectors with nozzles, canopies installed in a bunker under collectors with nozzles, characterized in that, in order to increase the efficiency of dust suppression, collectors are fixed on opposite walls of the bunker in the plane of its cross section the collector nozzles are made with flat-jet nozzles and are installed opposite one another, while the longitudinal axes of the nozzles are located 0-15 ° below the cross-section plane no bunker, and the nozzle - at an angle of 25-30 to the same plane. /////// m 1 A 0ig2 Figz