SU1664407A1 - Electrostatic dust separator - Google Patents

Abstract

This invention relates to a technique for cleaning air from particles suspended in it. The goal is to simplify the design, increase the degree of air purification from dust and gas impurities. The device comprises a collector, an inlet, an inner cylinder, a porous metal cylinder, such as a titanium (pressed powder), which is the discharge electrode, and a housing — a collecting electrode. A liquid, such as water, is supplied to the porous metal cylinder. 1 dw., 2 tab.

Description

This invention relates to a technique for cleaning air from particles suspended in it, for example, aerosols and other harmful gaseous impurities.

The purpose of the invention is to increase the efficiency of air purification from dust, aerosols and other gas impurities while simplifying the design.

The drawing shows an air cleaner.

The air cleaner includes a collector 1, an inlet tangential nozzle 2, an internal porous metal cylinder connected to a current source 3, a pipe 4 for introducing a liquid, an outlet nozzle 5, a housing — a collecting electrode 6 and a collector.

A high voltage, e.g. 50 kV, is applied to the porous titanium cylinder 3. The contaminated air enters through the nozzle 2 and twists in a downward spiral. Water or other fluid is supplied to this cylinder through manifold 7,

which is a closed ring that touches the inner side of the surface of the porous cylinder 3. The gap between the collector and the cylinder is spontaneous in the form of a gap between the rough surface of the cylinder and the collector 7. Since the cylinder is porous, it absorbs water well to the inside. Water by gravity under the force of gravity flows down both on the internal pores and on the outer part of the cylinder in the form of a film.

In the porous titanium itself, the liquid is directed in the inner part towards the outer part of the cyclone, since there is an electrostatic interaction between the charged cylinder 3 (minus) and the body (plus). This interaction is transmitted through the liquid.

The liquid phase (water) is strongly charged and when the value of the external force of the electric field is equal to the force of the surface tension, the film of the liquid due to the close proximity of the charges of the same

with

with

but

I

About VI

the mark is broken into droplets, the latter, for the same reason, continue to be crushed, evaporated to smaller fractions of a certain size. Experiments show that the liquid can be crushed to 30-350 microns under the specified conditions.

The sprayed, charged liquid in the form of droplets is directed from a porous cylinder having a minus polarity into the volume of the cyclone to the body, which serves as a collecting electrode with polarity plus. On its way, liquid droplets collide with solid particles of purified air and capture them. Next, liquid droplets with trapped particles are deposited by electrostatic and centrifugal forces on the precipitation electrode 6, i.e. cyclone body, and flow into the collection 1.

The gas on the way from nozzle 2 to the exit from the cyclone through cylinder 3 is simultaneously cleaned from harmful ingredients, for example hydrogen chloride. These harmful impurities are absorbed through physical and chemical absorption, in which case the cyclone acts as an absorber.

Example 1. A cyclone with an outer diameter of 100 mm, an inner cylinder of porous titanium with a diameter of 50 mm. The internal cylinder is supplied with a voltage of 50 kV of negative polarity, the air velocity in the ductwork of the ventilation system is 15 and 30 m / s, and the dust content of 50-100 µm dispersion is 180-250 mg / m3. In this case, the liquid is not

is sprayed and the efficiency of the device is determined depending on the air velocity and the presence of voltage supply. Example 2. The same cyclone. Besides

dust in the gas mixture contains hydrogen chloride 10 mg / m3. The cyclone efficiency is determined when applied to a porous cylinder. Water to air flow is 0.02 kg / l-s. The efficiency of the cyclone is given in table 2. As can be seen from the table. 1 and 2, the efficiency of the cyclone increases by 40-43% during ionization, and when water is supplied up to 100%, gas impurities, such as HCI, are absorbed in addition to dust in the cyclone, the absorption rate is 75%.

The use of the invention allows to simplify the design, since it is not necessary to manufacture and install a network of needles on

Claims (1)

internal cylinder by spraying a liquid from a porous metal to further increase the efficiency of air purification from dust and gas impurities Electrostatic air cleaner, comprising a housing, a dust collector, a tangential inlet, an internal metal cylinder connected to a current source, distinguishing so that, in order to simplify the design of air purification from dust and gas impurities, the inner cylinder is made of a porous metal material and is provided with an annular manifold with a pipe for inlet fluid in the upper part. Table 1 table 2 IVN (-) 50kV Purified dozduh Water / 7 Dusty e- bozdukh (+)