SU1240917A1 - Arrangement for dedusting air - Google Patents

Description

The invention relates to the mining industry and can be used to clean dusty air during crushing, sorting of broken rock mass and other technological processes.

The purpose of the invention is to increase the cleaning efficiency of dusty air due to the additional trapping of dust in the recirculation channel.

The drawing shows a device for cleaning air from dust.

The device consists of a housing with a chamber 1, inside which a louvered grill 2 is installed. In the lower part of the housing, a plate 3 is installed under the louver grille 2, forming a recirculation channel with inlet 4 and outlet stitches for supplying and discharging dusty of air.

Inside the case opposite the louvered grill 2 above the plate 3, the 6 Laval nozzle is placed. To collect the trapped dust particles, the device is equipped with a hopper 7 and scrapers 8. Supply of dusty air is carried out by means of pipe 9 with Laval's nozzle 6 fixed at its end, and discharge of purified air through pipe 10.

The device works as follows.

The dusty air is sucked into the pipe 9, occurs through the Laval nozzle 6, where the dust particles are enlarged and enter the louver chamber 1. Due to the difference between the volumes of the nozzle 6 and the louver chamber 1, the air flow rate decreases sharply

in the chamber, dust particles under the influence of gravity fall out of the air stream. Residual dust in the air stream encounters a louvered grill 2 in its path, hitting the blinds, mine dust is reflected from them and partially deposited on the plate 3 and the hopper 7, and then with some air moves into the zone of the entrance slit 4, where air is sucked in with a high concentration of dust into the recirculation channel. Purified air is vented through port 10.

Suction into channel 3 occurs due to the pressure drop before and after the nozzle 6, which causes movement of air masses in the recirculation channel.

In the recirculation channel 3, the polluted air stream is additionally cleaned. This occurs due to a sharp change in the direction of flow, dust by inertia falls out of the flow, enters the hopper, leaving the dust due to the difference in cross sections of the entrance slit 5 and the recirculation channel due to the change in flow velocity under its own weight falls out in the channel. Additionally, the purified air exiting the recirculation channel, through the exit slit 5, enters the louver chamber 1 and merges with the main stream and is fed again to the louvre grill 2 for cleaning. After each cycle of operation, the device is cleaned by scrapers 8 from the dust deposited on the surface of the plate 3 and in the recirculation channel and the dust is stored in the bunker 7.

Claims (2)

1. DEVICE FOR CLEANING AIR FROM DUST, including a housing with a chamber inside which a louvre grill is installed, nozzles for supplying dusty and exhausting purified air and a device for collecting dust particles, characterized in that, in order to increase the efficiency of cleaning dusty air for due to its recirculation and coagulation of dust particles, it is equipped with a plate installed in the lower part of the chamber with the formation of a recirculation channel, and a Laval nozzle fixed inside the chamber at the end of the nozzle for dusty water in front of the louvre grille. 2. The device according to π. 1, characterized in that the device for collecting captured dust particles is made in the form of a hopper and scrapers.