SU888804A3 - Corona electrode - Google Patents

Description

(5) Corona Electrode

one

The invention relates to a technique for cleaning gases from dust by electrostatic precipitators and can be used in industry, for example, in ferrous metallurgy for cleaning waste gases of open-hearth furnaces.

A corona electrode of an electrostatic precipitator of dust particles from exhaust gases is known, which contains a band body with teeth, fixed evenly along its end sides of the joint venture.

A disadvantage of the known corona electrode is that the points of origin and maintenance of the corona discharge are fixed, as the corona discharge develops from the tips of the teeth evenly placed on the electrode, which are dusty during the operation of the electrostatic precipitator. 20

The resulting dust lumps make it difficult, and, occasionally, corona discharge is suppressed at these points (Fig. 8). . Irregularity of current distribution along the length of the corona-producing electrolyte is created.

electrode and on the plane of the collecting electrodes, which leads to a decrease in the degree of purification of the gas flow and to different wear of individual parts of the electrode, which contributes to electrical erosion in areas of high current density due to uneven current distribution along the length. The greatest density is created in zone A of the sharp ends of the teeth (Fig. 8). The next negative factor is the fragility of the electrodes under mechanical effects (shaking).

The goal of isotope is to increase the juice life of the electrodes and increase the efficiency of their work by eliminating the listed disadvantages.

Claims (2)

The goal is achieved by the fact that in the corona electrode of an electrostatic precipitator dust particles from exhaust gases, containing a tape body with teeth fixed evenly along its end sides, the teeth are rectangular with rounded edges, the teeth thickness is less than the thickness of the tape body. The teeth are inserted into a housing made with a diamond-shaped cross section and curved at an angle relative to its axis. FIG. 1 shows the proposed corona electrode, front view; in fig. 2 is the same, side view, in FIG. 3 is the same, top view in FIG. the same, bottom view, in FIG. S electrode in the process; in fig. 6 optimal variant of the discharge electrode; in fig. 7, 8, 9 — variants of the electrode in three projections; in fig. 10 - diagram of loss of e) 1) of the efficiency in percent (ordinate axis) versus the duration of operation in the number of days (abscissa axis) of known and proposed electrodes. The body 1 of the electrode in its plane has teeth 2 with right angles which are placed along the length at the same distance. The teeth 2 have the same thickness as the body 1, their width is somewhat less than the width of the body, and the height of the teeth is less than their width. Place 3 connecting teeth with the body is smoothly rounded. The corners of the teeth are also rounded: formed by the intersection of the side end parts 5 at right angles to the front end parts of the six teeth. Rounding straight angles are of great importance for ionization. The radius of rounding should be at least 0.5 mm. The device works as follows. When dusting zone B, as shown in FIG. 6 ionization occurs in the nearby zone C, which has the same conditions as zone B, and the characteristics of corona development are the same. Zone C begins to glow. When a layer of dust falls from a tooth in zone B of ionization, it is again transferred to zone B. The possibility of moving TOMKI of ionization in a given part of tooth D for different characteristics of the electrostatic precipitator and the cleaned gas is accomplished by selecting rounding the corners k. A layer of dust covers only part of section D until it falls. The remainder of plot D serves to subsequently move the ionization point. In addition, the radius of rounding of the angle k and the length of section D are chosen so small that the energy return at the lowest cost is maximum. eight . 4 Thus, on each tooth of the electrode there are four working zones that are not subject to interference. FIG. 7 shows a discharge electrode, in which the body and the place of insertion of the teeth with the body are thicker than the teeth themselves. FIG. 8 shows the corona electrode, the thickness of the teeth of which is also less than the thickness of the body, but the teeth themselves are made by straining. For electrodes of this kind, there are no straight sections between the curves. In such electrodes, thin teeth cutting into the body matter. A modification of the corona electrode shown in FIG. 9 is generally similar to the electrode sample in FIG. 6, however, its body is reinforced by ribs 7, having a triangular shape and a slight bend in cross section, relative to its longitudinal axis. The electrodes described may be varied and supplemented. For example, the body of the electrode may have a tubular shape or a circular cross section. The teeth of the electrodes can be moved in different directions. The teeth of the electrodes can be made by rolling, pressing or flexible parts of the body. The advantage of the presented electrodes is confirmed experimentally. From the dependence of the cleaning efficiency on the operation time (Fig. 10), it can be seen that, under long-term operation conditions, there is no decrease in efficiency. Another significant advantage of new electrodes is the ability to emit points or zones of corona discharge even in the case of fluctuations of electric current below the established limits. Therefore, even when a large amount of energy is supplied, under severe operating conditions, very little erosion and corrosion is observed in the development zones. corona discharge Claim 1. The corona electrode of an electrostatic precipitator of dust particles from exhaust gases, comprising a tape case with teeth fixed evenly on its end sides, in order to increase the service life of electrogens and increase their performance, the teeth are rectangular with rounded edges. 2. Electrode according to claim 1, characterized in that the thickness of the teeth is less than the thickness of the housing; 3- The electrode according to claim 1, characterized in that the teeth are inserted into the housing. 8888 46 4. Electrode according to claim 1, characterized in that the housing is made with a cross section in the form of a rhombus. 5. The electrode according to claim 1, characterized in that the electrode body is bent at an angle relative to its longitudinal axis. Sources of information taken into account in the examination 1. Application of the Federal Republic of Germany f 2PEZ 7, cl. 12 6, 5. pub. 12.21.72. ig. f, ir: -ii I .., iim Ш iti Jp JESD igfigl FIG.  I f xJ iJ I