DE1096335B - Box-shaped trap area electrode for electrostatic precipitators - Google Patents

Description

GERMAN

It is known to design collecting electrodes in a box shape and to use these box electrodes To provide catch pockets. The separated dust accumulates in the catchment pockets and slides into the interior of the Box electrodes and thus reaches the bunker unaffected by the gas flow. Gutters are also known which are attached to the collecting electrodes and directed at an angle so that the accumulating therein Dust slides down in the inclined gutters and finally at the end of the collecting electrode Leaves gutter and falls freely into the bunker. There is a contact between the separated dust and the Gas flow inevitable. For this reason there are usually additional electrodes on the side of the collecting electrodes Pipes attached, in which the dust can fall unhindered into the bunker.

The precipitation electrode designs just described have, especially if they are box-shaped own and they are also attached catch pockets, a considerable width that inevitably the effective electrostatic precipitator cross-section and thus the performance of such an electrostatic precipitator belittles. However, if catching pockets are attached to smooth metal sheets around a smaller width of the collecting electrodes and thus an enlargement of the effective electrostatic precipitator cross-section, there is none Sufficient stability and dent resistance of large collecting electrode surfaces guaranteed.

To ensure high strength of the collecting electrode surfaces with a small width of the collecting electrodes To obtain, according to the invention, a box-shaped trap chamber electrode for electrostatic precipitators proposed whose catch surfaces consist of two plates provided with catch pockets, between which inclined channels are provided for dust removal, such that the catch pockets subsequent grooves in the direction of the gas flow sloping downwardly empty cove-shaped cut impressions of the sheet metal walls are formed, which do not capture the edge of the sheet metal plates themselves and that the indentations of the two sheets on the inside lying one on top of the other partitions between the two-sided grooves and with the catch pockets in a common, from the bent over vertical long sides of the sheets open dust collection shaft on one side.

Based on the drawing, the subject of the invention and its method of manufacture should be understood in detail.

Fig. 1 shows a front view of the vertical box electrode and

Fig. 2 shows a section along the line H-II and

Fig. 3 is a section along the line IH-III of Fig. 1;

Box-shaped trap chamber electrode
for electrostatic precipitators

Applicant:

Metallgesellschaft Aktiengesellschaft,
Frankfurt / M., Reuterweg 14

Walter Steueragel, Frankfurt / M.,
has been named as the inventor

Fig. 4 shows a section perpendicular to the course of the inclined grooves along the section line IV-IV of Fig. 1, in order to show the short construction height between two slots e ;

Fig. 5 shows a mirror-image arrangement of two box electrodes to each other, one in the middle have a common dust removal shaft and can be easily understood from the drawing.

In the figures, α is the front and

with b denotes the back of the box electrode (Fig. 2), insofar as it remains unaffected by the pressing process. Slits e of limited length are punched into the electrode plates α and b by means of indentations c, which are inclined so that dust removal channels arise, with webs or tabs a _x delimiting these slits in order to ensure the cohesion of the entire plate. At the same time, these non-slotted parts serve to connect the indentations c , which are arranged in mirror image to one another, that is to say towards the inner trap chamber. It is therefore not necessary to connect the indentations c of the two plates α and b at their ends over the entire length, as is made clear from Figs. 2, 3 and 4. There may be a small gap between the two ends, as this will become clogged over time. At the lower end of the inclined slots e , a common dust collection shaft s (Fig. 1 and 2) is provided on the side of the plate, which, as shown in Fig. 5, can also be provided in the middle of two mirror-inverted box electrodes. This shaft is closed on all sides, since the indentations c towards the side of the shaft, as can be seen from Fig. 2, are not slit, but extend in the vertical direction.

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The box electrodes with their beaded ends d shown in the figures only in part can end in a known manner to a point at the lower and also at the upper end, provided that a dust bunker connects to the box electrodes in the middle or on the side in a manner known per se. Compared to the previously known gutter electrodes, the gutter electrode according to the invention offers the particular advantage of being extremely simple and inexpensive to manufacture, whereby significantly thinner material thicknesses than before can be used, since the rigidity depends on the number of welded tabs Oi ₁ or the distance between the tabs a _{x is} interdependent. In the case of particularly thin wall thicknesses, these distances between the tabs a _x can therefore be selected to be particularly small, without the entire free passage cross section of the slots e being significantly reduced as a result. The large distance shown in the drawing example can in any case be reduced as desired without impairing the efficiency of the collecting electrode, which, moreover, can be shaken continuously or periodically in a known manner for cleaning.

It is also possible to use plastic as a building material, the indentations c being lined with metal foil so that the electric field is essentially concentrated on these indentations c , whereas the parts α and b which are not indented remain electrically shielded.

The channel electrode according to the invention can be used for both vertical and horizontal electrostatic precipitators use.

Claims (2)

Patent claims: 1. Box-shaped trap area electrode for electrostatic precipitators, the trap surfaces of which consist of two with trap pockets provided sheets exist, between which inclined channels for dust removal are provided, characterized in that the gutters adjoining the catch pockets from concave cut indentations running obliquely downward in the direction of the gas flow the sheet metal walls are formed that do not capture the edge of the sheet metal plates themselves that the indentations of the two sheets on the inside lying one on top of the other partitions between the Form grooves on both sides and with the catch pockets in a common, from the bent over the vertical long sides of the sheets open out on one side. 2. Channel electrode according to claim 1, characterized in that the parts (α, b) which remain standing after the pockets are pressed in, are attached electrically insulated and the pressed parts (c) are made electrically conductive, so that the electrical field emanating from the spray electrodes is substantially increased the indented parts concentrated. Considered publications:
German patents No. 471 795, 487 866,
536810, 712 251; Austrian Patent No. 130569;
French patent specification No. 911 017. 1 sheet of drawings © 009 697/454 12.60