SU865336A1 - Electromagnetic dust trap - Google Patents

Description

(54) ELECTROMAGNETIC DUST COLLECTOR

I

The invention is intended for the mining and metallurgical industries and can be used for cleaning process emissions from dust, in particular for cleaning emissions, from magnetizing roasting furnaces.

An electric dust collector is known, comprising a cylindrical collecting electrode, a corona electrode located coaxially with the housing, a dust receiving bin, supplying and discharging ducts, a magnetic system located outside the housing 1.

A disadvantage of the known construction is the poor removal of settled dust, which leads to a sharp decrease in the efficiency of this aoparate.

The purpose of the invention is to intensify the release of non-magnetic dust.

This goal is achieved by the fact that the cylindrical case is made of a nonmagnetic conductive material, such as stainless steel, with a drop-shaped, with attached needles, corona negative electrode suspended along the axis of the case. From the outside of the cylinder, paired parallel rows with a gap between them

along the movement of the flow to be cleaned, permanent flat magnets are installed. During the downward movement of air, the south and north poles of the magnets, located in adjacent rows, are alternating clockwise, the feed duct is located in the upper part of the body. FIG. 1 shows an electromagnetic dust collector, side view; in fig. 2 - the same top view.

The electromagnetic dust collector consists of a supply duct 1, which is connected to a cylindrical body 2 made of a nonmagnetic conductive material. An insulated box 3 is fastened in the inlet flue by means of stiffeners, in which the suspension insulators 4 are placed. A drop-shaped discharge electrode 6 is suspended to the insulators through the rod 5 and the needles 7 are attached on the outer side of the cylindrical body 2 permanent flat magnets 8 with a gap between the rows. The poles of the permanent magnets, placed in adjacent rows, alternate south-north in a clockwise direction. The lower end of the cylindrical body 2 is lowered into the dust-receiving bunker 9, the inner wall 10 of which, together with the cylindrical body, forms the dust-collecting window 11. The bunker 9 in the lower part is equipped with an unloading mechanism 12. The purified air is sucked out of the dust collector through the exhaust duct 13.

The operation of the electromagnetic dust collector is carried out as follows.

After applying voltage to the corona electrode 6 between the needles 7 and the cylindrical body 2, a corona discharge occurs. Dust particles entering the corona discharge zone are charged and start moving toward the settling plane of the cylindrical body. At the same time, the particles continue to move together with the downward cleaned stream. Therefore, in addition to the electric force on the particle, the electromagnetic force (Lorentz force) will act, directed at a right angle in the direction of the magnetic field between the permanent magnets of adjacent rows. Consequently, an increase in the flow rate of the purified air will make it possible to sharply intensify the movement of dust particles toward the settling surface. The settled particles under the influence of aerodynamic influence of the air flow move downwards, in this case electromechanical coagulation of fine dust occurs. The coagulated dust enlarged through the dust collection window 11 enters the dust-collecting bunt .J

ker 9, where, due to the forces of gravity, it is deposited on the bottom. Accumulating dust periodically through the mechanism 12 unloading is removed from the hopper.

Claims (1)

Invention Formula Electromagnetic dust collector comprising a collecting electrode made in the form of a cylindrical body, a corona electrode located coaxially with the body, a dust receiving hopper supplying and discharging ducts and a magnetic system located outside the body, characterized in that, in order to intensify the release of non-magnetic dust body made the non-magnetic conductive material, the corona negative electrode is made drop-shaped and equipped with needles, the inlet duct is installed in the upper part of the body, and the magnetic system is made in the form of flat permanent magnets, installed in parallel parallel rows at a distance from each other the south and north poles of the magnets, located in adjacent rows, are arranged in an alternating clockwise sequence. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 23370, cl. 12 e 5, 1929.