CS197398B1 - Dedusting device for the loose material - Google Patents

Description

(54)

Dedusting equipment for bulk material

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust removal device for bulk material, in particular for coke when conveying it using continuous conveyors.

Powders for loose material are known, provided with an inclined trough for conveying the material by a self-slip. In the bottom of the trough there is an opening with a grille for the passage of a pressure air which carries with it a seam of conveyed material. In order to increase the dedusting effect, the grating vibrates, but it has one significant drawback, namely that, in the event of a sudden interruption of the pressure air supply, the openings in the grating are blocked by pieces of bulk material. Another drawback of the use of the grating is the impossibility of changing the size of its openings and the resulting limited use of the device.

To eliminate these drawbacks, louver dusters with slotted lattices consisting of cascaded, mutually parallel louver plates are used, between which there are gaps whose width is adjustable by simultaneously swiveling all the louver plates at the same time. Adjusting the gap width adjusts the amount of pressurized air and thus 1 dedusting effect * The disadvantage of these devices is the positioning of the pressure fan above the diffuser and the suction under the diffuser, so that the material layer is pressed against the grid by compressed air.

All of the above drawbacks of the known de-dusting devices are overcome by a device according to the invention which is also provided with an oblique trough with a bottom opening covered by a slot grating formed by cascaded louvre plates which are pivotable and have adjustable air passages whose width is adjustable simultaneous tilting of all boards at the same time, both by pressure and exhaust fan. The principle of the invention is that the pressure fan is located below the grille, while the exhaust fan is located above the grille.

By supplying the pressure tube below the grille, the material on the grate loosens, making it easier to separate the dust which is sucked off by the upper suction fan,

197 398

197 398 on the one hand, prevents the grid from clogging the material in the event of a sudden break in the compressed air inlet;

BRIEF DESCRIPTION OF THE DRAWINGS The object of the invention is apparent from the description and the schematic drawing, in which FIG. 1 shows an exemplary embodiment of the device according to the invention in longitudinal section, and FIG.

The dust removal device according to FIG. 1 is provided with a closed oblique chute 1 for conveying loose material, for example coke, with a self-slip. In the bottom 2 of the chute X there is an aperture with a slit grating. 2 · ^{Above the} grating 2 'in the trough lid X, an opening through which the trough X exits the outlet throat χ connected behind a dust collection device (not shown) at the suction mouth of the upper exhaust fan 8, which sucks air / dust particles from the trough. X Over The Bar 2 ·

The lattice 2 is made up of mutually parallel louvre plates 2 of rectangular shape * The plates 2 are cascaded one above the other in a direction perpendicular to the longitudinal axis of the trough X · Carried along the longitudinal edges of the adjacent plates 2 are the slots 10 '

A longitudinal shaft 11, fixed at its ends in bearings 12 (FIG. 2), which are fixed in the side walls 13 of the trough X, is fixed in its geometric axis to each grid plate 2.

To one shaft shaft 11 protruding from the trough χ is attached an arm 14 pivotally connected to an inclined rod 15 common to all arms 14 and arranged parallel to the bottom 2 of trough X. The trunnion 15 is pivotally connected to a piston rod X ' ·

The louver plates 2 are provided with a wear-resistant coating 18 on the upper side, for example a diabase, i.e. a stoneware coating.

The function of the described device is as follows:

During the transfer of bulk material, such as coke, by self-sliding from top to bottom along the bottom 2 of the inclined trough X, the material falls gradually from one louvre plate 2 to the other, the material velocity being such that material falls through slits 10 between plates 2. it pushes the air through the slots 10 inside the trough X while carrying up dust particles of material moving above the slits 10 with it. The air-dust mixture is directed into the exhaust port X by means of an upper suction blower (not shown) to clean the air from the dust. and clean air is sucked in by the fan £ ·

To increase the sauna effect, the amount of air sucked in by the upper fan 8 is greater than the amount of air pushed by the lower pressure fan 2 *.

The parameters of the compressed air flow are adjusted both by the speed of the fans X, 6 and by adjusting the width of the slots 10, i.e. the gaps between the louver plates 6, by means of a hydraulic cylinder 17 via a drawbar 15 and swivel arms 14. ·

The de-dusting effect is increased by the device according to the invention, thus contributing to the improvement of the working conditions in the plants where the coke or other loose materials are sprayed.

Claims (1)

SUBJECT OF THE INVENTION Dusting device for loose material provided with a sloping trough with a bottom opening covered by a slot grating formed by cascaded jalousie plates, which are pivoted and have gaps for the passage of a pressure air whose width is adjustable by a pressure and exhaust fan, that the pressure fan (5) is located below the grille (3), while the exhaust fan (8) is located above the grille