LT4627B - A centrifugal electrostatic filtr - Google Patents

Abstract

The invention pertains to equipment for cleaning air polluted by solid particles and may be used in the construction or energy industry, for the cleaning of polluted air being released into the atmosphere.The air cleaning device has a cylindrical body (1), to which are connected tangentially a polluted gas/air supply inlet pipe (2) and a cleaned air/gas supply outflow pipe (3). Inside the body a dielectric cylinder (4) is installed, around which ionising electrodes (5) are installed. Along the upper internal surface of the body are installed precipitation electrodes plates (6), with a vibration mechanism (7) intended for their re-generation. Particles bouncing off the precipitation electrodes are collected in the bunker (8). The device also includes an electrical power supply block (9).

Description

The present invention relates to a unit for purifying air contaminated with particulate matter and can be used to purify contaminated airflow from the building materials and energy industries.

There is a known technical solution for gas flow purification in two steps: 1) through a battery cyclone. 2) the gas stream is then fed to an electrostatic filter. (U.S. Patent No. 5,160,510).

The disadvantage of this solution is that in order to achieve the required cleaning efficiency of the contaminated air, two treatment plants are required, resulting in high hydraulic pressure losses, which significantly increases the cost of cleaning.

An electrocyclone is known which has all the elements of a cyclone and a mesh barrier inside the cyclone that ionises the solid particles in the gas stream. Contaminated air is cleaned by centrifugal forces and electrostatic fields. (USSR Patent 1835168).

A disadvantage of the present invention is the relatively high self-hydraulic resistance of the cyclone due to the mesh barrier.

The prototype of the present invention is a linear electrocyclone (USSR Patent No. 1614271) having a conical body to which a feed tube is tangentially connected. In the middle of the body hangs a conical cylinder - ionizer. The particles of contaminated air, which are subjected to centrifugal and electrostatic forces, move towards the cyclone body, which slides into the collection hopper. The purged air is discharged through an outlet duct installed in the lower part of the conical body.

The disadvantage of this unit is the high hydraulic pressure losses caused by the discharge of the purified gas stream through the lower part of the cyclone. Nor does the outstanding recovery electrode - cyclone body regeneration system - significantly reduce the use of equipment for cleaning particles with greater clutches.

The object of the invention is to simplify the design of the device and improve its performance.

This goal is achieved by reducing the unit's hydraulic resistance using only a partial cyclone effect Simplicity of unit design ensures easy operation of the equipment

A general view of the air purifier is shown in FIG. 1.

The air purifier comprises a cylindrical housing 1 to which tangentially the inlet ducts 2 and the outlet ducts 3 for contaminated gas are tangentially connected. A dialectric cylinder 4 is mounted in the center of the housing, with the ionizing electrodes stretched about it.

Operating principle of air purifier.

A flow of gas fed through a contaminated air supply duct 2 tangentially connected to the lower portion of the cylindrical body 1, moves in a cylindrical direction towards the exhaust duct 3 at the top of the cylinder, changing the linear direction of movement to the helical one. The contaminating particles moving with the gas stream, upon changing the direction of the gas flow, collide with the encountered barrier, the settling plates 6, which are also subjected to centrifugal forces, and collect on the settling plates. The ionizing electrodes 5 stretched around the dialectric cylinder 4 in the center of the housing electronically emit pollutant particles throughout the gas volume which, under the influence of an electrostatic field, also move towards the deposition plates.

The collision of pollutant particles, the centrifugal force, the upward movement of the gas stream and the downward gravitational force of the particles and the electrostatic field forces ensure efficient removal of the solid particles from the gas stream.

Just as a unit does not undergo a complete cyclone process and only the twisted gas stream is discharged through a tangentially connected discharge duct, the hydraulic losses of this unit are significantly lower than those of a cyclone unit.

For device regeneration, a vibratory device 7 is provided for shaking the particles from the settling plates into the hopper 8.

. Separate electrical unit for powering the electrical part of the unit 9.

The technical and economic efficiency of the proposed equipment is determined by its simple construction and simple operation conditions, which ensures lower material and labor costs and gives an economic effect. '

Definition of the Invention

Claims (1)

Definition of the Invention 1. A centrifugal electrostatic filter having a cylindrical housing having an electrostatic particle deposition system, characterized in that discharge electrodes are disposed about a dielectric cylinder and plate deposition electrodes are mounted on the inner surface of the housing.