SU719696A1 - Electric filter - Google Patents

Description

, one

The invention relates to the field of electrical dedusting of industrial gases, and can be applied in carbon black production, in power system, in petrochemistry, and in other areas of national economy.

An electrostatic precipitator is known with a vertical flow of gas to be cleaned to trap coal dust from exhaust gases of the carbon extractors and aspirated air of the Charcoal mills. Such an electrostatic precipitator consists of a housing, precipitated pocket electrodes, corona electrodes, and shaking mechanisms 1.

An electrostatic precipitator is also known, consisting of tubular precipitation electrodes fixed by upper ends in a tube array, a supply duct mounted above the tube array, a discharge duct placed under the tube array, and shaking mechanisms 2.

The disadvantages of the operation of electrostatic precipitators are that dust particles with good electrical conductivity (soot, coal dust), in contact with the collecting electrode, almost instantly recharge, acquire charge of the same sign as on the electrode, repel themselves from the electrode and re-enter interelectrode space. Repeated recharging of particles contributes to their removal from the electric field and the electrostatic precipitator.

The aim of the invention is to increase the efficiency of the electrostatic precipitator (the degree of dust collection with good electrical conductivity, reduction of metal intensity and cost of the electrostatic precipitator).

The goal is achieved by the fact that each corona-forming electrode is installed outside the precipitating electrode and is made of several pipe lengths, mechanically fastened and placed one under the other so that they form annular slots. To create an effective corona discharge of a negative sign, each piece of electrode along the entire perimeter from one or two ends is equipped with a pointed protrusion, the tip of which is directed inside the electrode. The upper part of the electrode is fixed in a tube sheet. The grille is connected to the electrostatic precipitator housing.

The precipitation electrode is made with an electrical conductor nip cable or pipe with a smooth

  pnverhnebsyo, located kontsentrichno ° ta fPr & No. ru ED®x) 1 Sjök1 and ČoiskyZOlei are anonymous from Shpusa. .

The drawing shows one of the options

the proposed electrostatic precipitator in the section.

The electrostatic precipitator consists of body 1,

tube sheet 2, the inlet duct 3,

the output of the flue 4, the hopper 5.

The corona electrode contains several sections 6 made of scraps of a round pipe. The ends of each section 6 along the perimeter are provided with pointed protrusions 7. The section is fastened together by bridges 8 and form annular slots 9.

The precipitation electrode 10 is placed at the end of the contact inside the discharge electrode.

and is held on the housing with the help of a bushing insulator 11. The removal mechanism 12 is mounted on the insulator 13. A spring 14 is placed between the insulator 11 and the flange of the collecting electrode 10. The electrostatic filter works in a slew.

Compression from a high-voltage source is applied to the electrodes: plus it goes to the collecting electrode 10; the minus is connected to a grounded electrostatic precipitator casing., when the voltage is turned on, the tips of the projections 7 are coronaed. The flow of negative ions and electrons under the action of electrically scaled $ G moves to the precipitation electrode | 0. Dusty stream through the inlet duct 3 enters the interelectrode

Coronation and sedimentation

electrodes. The dust particles, acquiring the charge of a negative sign, are transferred to the precipitating electrode 10. Elyu: the imputable dust has a small LESSON conductivity (the electrical resistance is greater than 10 ohm), the charged Cybitz 1: are deposited and held on

precipitation electrode.

When collecting dust with good electrical conductivity (LEARNING: electrical resistance is less than 10 Ω-m, like coal dust, carbon black), the particle that comes with the precipitating Electrode is recharged, i.e., recharging, i.e. charged by the same sign. But the faifT ri is precipitated in a superconductive way. The flow of ions of a negative sign is moving, the positive charge of the particles is neutralized, the particle again acquires a charge of the negative sign and moves to the precipitation electrode. Being in the zone

a stronger electric field, particles. By performing a repeated recharge, contour around the collecting electrode in the form of a sheath. Under the influence of gravity and moving gas flow

the dust falls and enters the hopper 5. The gas freed from dust particles is partially through the annular slots 9 enters the space between the housing and the discharge electrodes, which ensures a lower flow rate in the lower zone

0 electrostatic precipitator. The passage of the lower zone of the corona electrodes, the gas flow changes its direction by 180 ° and through the gas duct 4 is removed from the electrostatic precipitator.

The largest negative ion flux and the greatest electric field intensity are near the tips of the protrusion 7, therefore the gas flow intersects this 2 (it is removed through annular slots completely free of dust particles. Pulling away from the collecting electrode is carried out by the vibration mechanism 12 or percussion. Discarding of the corona-providing electrodes is performed periodically. The described electrostatic precipitator has small dimensions and can be used to trap various dusts with both high and low electrical conductivity.

Claims (2)

Invention Formula The electrostatic precipitator, consisting of a body, tubular corona and collecting electrodes, installed end-on and fixed with upper ends in the pipe  grid, inlet and outlet ducts, hopper and shaking mechanisms, characterized in that, in order to increase the efficiency of the electrostatic precipitator, the corona electrode is mounted outside the precipitating electrode, insulated from the housing, and made of pipe of the same diameter, fitted around the end perimeter pointed protrusions directed inward to the surface of the precipitation electrode, and connected by bridges. 5 Sources of information taken into account during the examination 1. V.Nozhov. Cleaning of industrial gases with electrostatic precipitators. M., 1967, p. 142 - 143 55 2. US patent No. 2508133, cl. 55-112, 1950 (prototype).