DD158003A1 - DESIGN AND ARRANGEMENT OF PLATE-OR STRIP-FUSED LOW-HAZARD ELECTRODES - Google Patents

Abstract

The invention relates to the design and arrangement of a plate or streifenfoermigen precipitation electrode for electrostatic precipitator with horizontal gas passage, which has a good shape stability by a border stabilized design, due to the symmetrical arrangement of the V-shaped webs is very good stackable and rational, economical and quality produced can be.

Description

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Title of the invention

.Design and arrangement of plate or strip-shaped precipitation electrodes

Field of application of the invention

The invention relates to the design and arrangement of plate or strip-shaped collecting electrodes for electrostatic precipitator with horizontal gas passage.

Characteristic of the known technical solutions

Plate-shaped or strip-shaped collecting electrodes for electrostatic precipitators with a horizontal gas passage are known and described in DD-WP 118, which have symmetrical V-shaped webs on both sides and alternately symmetrically arranged in the cross-section. In each case between two in a plane adjacent V-shaped webs is a low-flow dust collecting space, the length of which can be in any ratio to the height of the web. The lateral termination of the collecting electrode is formed by a short, in-plane strip.

These precipitation electrodes have the disadvantage that their dimensional stability, especially at long lengths, does not meet the requirements, since the strain hardening resulting from the profiling in the radii of the webs and the residual stresses at the edges of the collecting electrode does not gradually decrease, but the high voltage peaks of V -shaped ridge drop directly in the short edge strip to about O. Due to the abnormal residual stress distribution, in particular at the edges of the cross-sectional profile of the collecting electrodes, already twisted during profiling and from. the straight lines deviating profiles, so that a costly messages dsr collecting electrodes is required.

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In addition, it is possible by the uneven residual stress distribution that the distance between the spray and precipitation electrodes during operation, mainly in the action of heat, unaffected changes and premature electrical flashovers are triggered. Another disadvantage is that uncontrollable vibrations in. The edge zone of this collecting electrode occur at G-round this uneven edge stresses during operation, which reduce the electrical breakdown voltage, can lead to fatigue of the material and thus to deformation and breakage.

Object of the invention

The aim of the invention is to develop plate- or strip-shaped collecting electrodes for Horizontalelektroabscbeider, which have a high inherent rigidity both in the longitudinal and in the transverse direction, especially at long lengths (> 10 i), which achieve optimum technical and economic parameters with minimized material consumption, improve the degree of separation and the availability of the electrostatic precipitator and reduce packaging and transport through good stackability

Explanation of the essence of the invention

The invention has for its object to provide a plate-shaped or strip-shaped, dimensionally stable, in particular'randstabilisierte, aerodynamically favorable, with electrically optimal field line distribution, effective catching areas and vibrationally good properties equipped precipitation electrode. , . ·

According to the invention, the Aufgäbe is achieved in that the plate or strip-shaped collecting electrode has in the middle of the cross section at least two symmetrical in a plane adjacent V-shaped webs that the edge

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lying webs are formed as oppositely opposed V-shaped webs, wherein the outermost web is smaller in amplitude to the outside than the other webs and opens in a narrow width defined in the edge strip and that the lengths of the forming Staübfangräume in a certain ratio to Height of the bridges, stand.

By this shaping of the collecting electrode, it is possible to uniformize the strain hardening occurring during profiling and the residual stresses over the entire cross-sectional profile of the radii to the edge zone, so as to avoid the distortions and rotations of the collecting electrode.

embodiment

The invention will be explained in more detail below using an example. The accompanying drawings show:

1 shows a cross section through the precipitation electrode according to the invention, each with two adjacent large webs per plane;

FIG. 2 shows a cross-section through the gas-filled collecting electrode according to FIG. 1 with opposite tips of the small outer webs; FIG.

FIG. 3 shows a cross section through the gas-laid collecting electrode according to FIG. 1 with opposite tips of the large outer webs; FIG.

FIG. 4 shows a cross-section through the gas collecting precipitation electrode according to FIG. 1 with tips of the webs pointing into the catching spaces;

5 shows a cross section through .a further possible form of the collecting electrode according to the invention.

In Fig. 1, the symmetrical plate or strip-shaped collecting electrode 3 is shown. From the middle to the outside, this one has two in each plane

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V-shaped webs 4, 10, wherein the outer leg 1 of the web 4 is extended in such a way over the center of the collecting electrode 3 in the other plane, .daß a smaller web 5 is formed, whose also lying outside leg 8 in the narrow edge strip 9 "between two web tips 12, which lie with the length 11 apart and the height 7 of the V-shaped webs form the dust collecting spaces 13, 14, 15, wherein the largest length 11 of the dust collecting spaces 13» 14-, 15 the ratio 12 The small web 5 and the narrow edge strip 9 at the outermost edge 2 of the collecting electrode 3 serve to stabilize the collecting electrode 3 and to reduce the stresses and work hardening during profiling and to fasten or secure it. Lock with the neighboring electrode. The height 6 of the web 5 is in the ratio of preferably 2 _f 3i1 to the height 7 of the V-shaped webs 10th

Figures 2 to 4 show the cross-section through arranged in G-assenforui collecting electrodes 3 rait disposed therebetween spray electrodes 16 in three possible ways.

In Fig. 5, a collecting electrode 3 i & cross section is shown, which is provided with a plurality of mutually paired V-shaped webs 10, and also each has a small web 5 at the edge.

Claims (3)

- ^ - 22937 9 3 Invention claims 1 · Design and arrangement of plate or strip-shaped collecting electrodes according ViP 118 234 arranged with mutually and symmetrically, in each case between two in a plane adjacent, forming a dust collecting V-shaped webs, in particular for electrostatic precipitator with horizontal gas passage, characterized in that outer leg (1) of the web (4) located at the edge (2) of the strip-shaped collecting electrode (3) is extended beyond the middle into the other plane so as to produce a smaller web (5) whose height (6) is in a relationship to the height (7) of the web (4) of 1ϊ2, · 3, whose outer leg (8) ends in a lying in the plane of the collecting electrode (3) narrow edge strips (9) of at least 20 mm width, that between the two outer webs (4) a smooth precipitation surface or in pairs and mutually or individually and mutually several V-shaped webs (10) are arranged and that the ratio of the height (7) of the V-shaped webs (4; 10) to the length (11) of each between two adjacent, from the level of the collecting electrode (3) projecting web tips (12) of the webs (4j 5 * 10) resulting dust collecting spaces (13; 14? 15) £ 1:12. 2. Design and arrangement of plate or strip-shaped collecting electrodes according to item 1, characterized in that the collecting electrodes (3) are arranged in a lane so that the protruding from the plane of the collecting electrode ridge webs (12) of the outer webs (4) face each other and that one or more known spray electrodes (16) are provided in the middle of the lane. 3. Design and arrangement of plate-shaped or strip-shaped collecting electrodes according to item 1, characterized in that the collecting electrodes (3) are arranged in the form of a gas so that the low-level electrodes -I 229 37 9 3 Impact electrode projecting web tips (12) of the V-shaped webs (10) face and that in the center of the middle one or more known spray electrodes (16) are provided. Design and arrangement of plate-shaped or strip-shaped collecting electrodes according to item 1, characterized in that the collecting electrodes (3) are arranged in the form of a gas so that the web tips (12) of the outer webs (4) projecting from the plane of the collecting electrode (3) Face dust collecting space (14) and that in the center of the middle one or more known spray electrodes (16) are provided. Design and arrangement of plate- or strip-shaped Fiederschlagelektroektroden according to item 1, characterized in that the width of the collecting electrode (3) can be arbitrarily 'chosen and that any number of collecting electrodes (3) can be arranged side by side. For this ή page Z eichnung