SU754087A1 - Aspiration shelter for loose-material handling station - Google Patents

Description

one

The invention relates to the mining industry and can be used to localize the release of dust when handling bulk materials.

Known aspiration shelter point overload bulk material, consisting of a housing, seals, duct system and two trapezoidal plates rigidly attached to the side walls inside the housing and located in a plane parallel to its upper base 1.

A disadvantage of the known aspiration cover of the bulk material transfer point is the absence of elements that reduce the entrainment of material into the aspiration network, since the air from the chamber bounded by two flattened aprons is not completely exhausted.

The closest technical solution to this invention is the aspiration shelter of a belt conveyor, consisting of a protective casing, an aspiration funnel, sealing aprons and a pneumo-disperser with a supply of finely crushed water against the moving material 2.

A disadvantage of the known device is that the dust suppression efficiency is not high enough, because of the continuity of the flow of the bulk material, wetting occurs only in the upper layer of the material.

The aim of the invention is to increase the efficiency of aspiration by reducing the ejection head in the aspiration cover and uniformly moistening the bulk material.

ten

This goal is achieved by the fact that the aspiration cover of the bulk material transfer point is provided with a bulk material flow divider made in the form of dividing plates with longitudinal

15 slotted holes, mating at an angle to one another, a protective box with a mixer located in it, mounted under the divider, as well as a sliding sleeve for connecting the mixer to

20 with a water / air mixture supply system, the mixer being designed as a hollow shaft with irrigation holes and stepped blades rigidly fixed on it.

FIG. 1 shows the aspiration shelter of the bulk material transfer point; in fig. 2 - section A-A of FIG. one.

The aspiration cover consists of a protective casing 1, inside which under the driving drum 2 of the loading conveyor 3 an divider 4 of the flow of bulk material is placed at an angle to the falling flow of bulk material, made in the form of dividing plates with longitudinal slotted holes mating at an angle to one another. In the lower part of the casing, under the divider, there is installed a mixer, made in the form of a hollow shaft 5 with holes 6 and stepped vanes 7, placed inside a protective box

8i connected through a sliding sleeve

9 with a pipe 10 for supplying the air-air mixture. There is an aspiration funnel 11 for suction of dusty air. Sealing aprons 12 are placed inside the casing.

The device operates as follows. The bulk material falling in a flat flow falls on the separator plates of the splitter 4, which is installed at an angle to the falling flow of material. The material is divided into separate jets, which are additionally dispersed, passing through the longitudinal slit holes in the plates. The scattered material gets on the stepped vanes 7, located on the rotating shaft 5 of the mixer, mixes evenly, wetted and along the inner wall of the protective box 8 enters the belt of the discharge conveyor. The water-air flow entering through the irrigation holes 6 of the mixer towards the ejection flow created by the falling material reduces the ejection pressure in the shelter, resulting in a decrease in the amount of dust-laden air escaping from the shelter.

Claims (2)

1. USSR author's certificate number 350971, cl. E 21 F 5/00, 1970. 2.Kalmykov A.V. Dust removal from crushing workshops. M., 1976, p. 68-69, fig. 43 (prototype). WHO-Airship mixture FIG. 2