DE1141260B - Device for rinsing off the dust deposits on high-voltage feed lines in electrostatic wet separators - Google Patents

Description

GERMAN

PATENT OFFICE

INTERNAT. KL. B Ol

M47479HI / 12e

REGISTRATION DATE: DECEMBER 22, 1960

NOTICE THE REGISTRATION ANDOUTPUTE EDITORIAL: DECEMBER 20, 1962

To keep the isolators on electrostatic precipitators free of dust deposits, so that their insulating effect is achieved is not impaired, these are arranged in specially provided isolator chambers. So that as little dust-laden gas as possible can penetrate these chambers, their walls each shifted a little into the separator housing. These isolator chambers are mostly arranged on the cover of the electrostatic precipitator. Since these chambers after the interior of the electrostatic precipitator because of the implementation of the high-voltage cables are open, dust-laden gas often reaches the insulators. To this evil, however, on to reduce a minimum, it is known to attach protective tubes at the end of the insulator chamber wall, which sometimes narrow conically, so that the inlet openings for the dust-laden gas are so small are kept as possible. If the isolator chambers are still flushed with clean gas, the remains Isolator generally free of dust deposits. At the lower edges of the protective tubes arise however, harmful eddies caused by the gas flow, as the dusty gases in can penetrate the lower part of the protective tube. This creates on the high-voltage supply lines in this area Dust deposits that can lead to disruptive flashovers. Through the clean gas flowing around the isolators or through Mechanical tapping, as practice shows, can hardly be used to remove these dust deposits.

To prevent the formation of eddies leading to pollution, it is also known to use the isolator with a flushing pipe or diffuser pipe protecting them against dirt and covering them To give tubes a venturi-like shape. Finally, it is also known to be a gaseous, Float-free warm insulating medium in countercurrent to the protective gas in one of the current-carrying ones Send ladder surrounding pipe duct.

According to the invention, therefore, in electrostatic wet separators in one below an insulator two or more sprinkler nozzles arranged around the high-voltage supply line protective tube so arranged obliquely towards the lower opening of the protective tube that through the conical and / or cleaning liquid sprayed out like a flat jet, dust deposits inside and outside of the protective tube adhere to the high-voltage supply lines, are detected, after a Further development of the invention these nozzles with the liquid supply lines to the cleaning Device for rinsing off the dust deposits on high-voltage supply lines

in electrostatic wet separators

Applicant:

Metallgesellschaft Aktiengesellschaft,
Frankfurt / M., Reuterweg 14

Jean Wiemer, Oberhöchstadt (Taunus),

and Erich Schreiber, Frankfurt / M.-Bonames,

have been named as inventors

of the collecting electrodes arranged rinsing nozzles are connected in such a way that the high-voltage supply lines to the spray electrodes are periodically rinsed together with the collecting electrodes.

According to a further feature of the invention, the sprinkler nozzles are annular, as a pressure vessel trained holding devices arranged.

The advantage of this device is that at the same time when the collecting electrodes be cleaned of dust deposits by spraying with rinsing liquid from rinsing nozzles, so if the The high voltage is switched off, including the dust at the critical points on the high-voltage supply lines can be effectively removed.

The invention is explained in more detail using an exemplary embodiment.

Fig. 1 shows a section through part of a separator housing, namely an isolator chamber with high voltage supply line,

Fig. 2 shows a cross section of the protective tube 4 along the section line IMI of Fig. 1.

1 with a bushing insulator is designated, which is divided by an insulator chamber divided by a partition 2 3 is surrounded. A protective tube 4 is attached to the lower end of the insulator chamber 3. With 5, the high-voltage supply line to the spray frame 6 with the spray electrodes 7 is designated. In the upper part of the protective tube 4, the holding device 8 for the sprinkler nozzles is on its inner wall 9 arranged, which in a further embodiment of the invention at the same time as a pressure vessel for

209 748/290

the sprinkling liquid is used. The annular pressure vessel 8 is on the line 10 with the Feed line 11 for the rinsing nozzles 12 for cleaning the collecting electrodes 13 in connection. The housing wall of the electrostatic wet separator is at 14 and that below the isolator chamber arranged partition walls are with

15 designated. The schematically indicated possibly occurring dust deposit 16 is of the Nozzles 9 outgoing cones of liquid 17 completely detected. After switching off the high voltage, for example an electrostatic wet separator field, consisting of two collecting electrodes 13 (only one of which is drawn) between both sides of the spray frame 6, the nozzles begin ig 12 to rinse off the collecting electrodes 13, and at the same time by means of the nozzles 9, the dust coating

16 on the high-voltage supply line S rinsed off.

As can be seen from Fig. 2, the protective tube 4 with the pressure vessel 8 along its surface line the entire length of a passage opening 18 which is only slightly wider than the cross section of the high-voltage supply line 5 needs to be around the protective tube 4 with the pressure vessel 8, which are attached at 19 to the wall of the isolator chamber, easy to replace without the connection 20 of the high-voltage supply line 5 with the spray frame 6 needs to be solved. A removable cover 21 closes the gap 18 so that no gas can enter through it during operation can.

Claims (5)

PATENT CLAIMS: 1. Device for rinsing off the dust deposits on high-voltage supply lines in electrostatic wet separators below the bushing or support insulators by means of sprayed cleaning liquid when the high voltage is switched off, characterized in that in the one below the insulator (1) around the high-voltage supply line (5) for the spray electrodes (6, 7 ) provided protective tube (4) obliquely after the lower opening of the protective tube (4) directed sprinkling nozzles (9) are arranged. 2. Apparatus according to claim 1 with a wet rinsing device for the electrodes, characterized in that that the nozzles (9) with the liquid supply lines (11) to the cleaning of the collecting electrodes (13) arranged rinsing nozzles (12) are connected in such a way that the High-voltage supply lines (5) to the spray electrodes (6, 7) periodically together with the collecting electrodes (13) can be rinsed off. 3. Device according to claims 1 and 2, characterized in that the nozzles (9) on one are mounted at an angle to the vertical arranged annular holding device (8). 4. Device according to claims 2 and 3, characterized in that the holding device (8) for storing cleaning fluid as an annular pressure vessel with preferably triangular sectional profile is formed. 5. Device according to claims 3 and 4, characterized in that the protective tube (4) with the pressure vessel (8) has an opening (18) along its entire length in the surface line, which is a little wider than the cross-section of the high-voltage supply line. Considered publications:
German Patent No. 592291;
German interpretative document No. 1093 447. 1 sheet of drawings © 209 748/290 12.62