US2701028A

US2701028A - Electrical precipitator

Info

Publication number: US2701028A
Application number: US254030A
Authority: US
Inventors: Paul F Eilenberger
Original assignee: Research Corp
Current assignee: Research Corp
Priority date: 1951-10-31
Filing date: 1951-10-31
Publication date: 1955-02-01
Anticipated expiration: 1972-02-01

Description

Feb. 1, 1955 P. F. ElLENBERGER ELECTRICAL PRECIPITATOR 3 Sheets-Sheet 1 Filed Oct. 31. 1951 INVENTOR Paul F fi'iembe A'ITDRNEYJ Feb. I, 1955 P. F. EI-LENBERGER ELECTRICAL PRECIPITA'ILOR- s Sheets-Sheet 2 Filed Oct. 31. 1951 INVENTOR Paw F Blenfiqger ATTORNEYS Feb. 1, 1955 P. F. EILENBERGER zflvm ELECTRICAL PRECIPITATOR Filed Oct. 51, 1951 3 Sheets-Sheet s INVENTOR 21] F fflenfiefger BY W- W ATTORNEY) United States Patent ELECTRICAL PRECIPITATOR Paul F. Eilenberger, Plainfield, N. J., assignor to Research Corporation, New York, N. Y., a corporation of New York Application October 31, 1951, Serial No. 254,030

3 Claims. (Cl. 1837) This invention relates to electrical precipitators and particularly to electrical precipitators having liquid flushed collecting electrodes.

An electrical precipitator construction having llqllld flushed collecting electrodes is described in United States Patent 1,968,334 to A. N. Crowder in which vertical tubular collecting electrodes are supported in a horizontal. header sheet near their upper ends forming a container for a liquid pool around the upper ends of the tubes from which liquid flows down the inside surfaces of the tubes. This form of construction has been very successful in practice, but the accurate adjustment and leveling of the upper ends of the tubes to insure substantial equal supply of liquid to each tube and uniform flow of liquid down the inner surfaces of the tubes has been troublesome and time-consuming.

A principal purpose of the present invention is to provide an electrical precipitator construction of the liquid flushed type in which the diflicultics in adjusting and maintaining the level of the upper ends of the collecting electrodes is greatly minimized.

This is accomplished in the precipitator of the invention by providing readily adjustable weir members on the upper ends of the collecting tubes whereby leveling of the overflow edges may be efiected without altering the position of the tubes, so that the tubes may be welded or otherwise firmly positioned in the header sheets when the precipitator is erected, making the final adjustments of level after construction, and as required during operation, by altering the position of the weir members.

This and other features and advantages of the invention will be more fully described with reference to the accompanying drawing in which:

Fig. 1 is an elevation in partial section of an electrical precipitator embodying the principles of the invention;

Fig. 2 is a fragmentary horizontal section on line 2-2 of Fig. 1;

Fig. 3 is a fragmentary enlarged section of a portion of the precipitator of Fig. 1;

Fig. 4 is an enlarged horizontal section on line 44 of Fig. 2 through the upper end of a collector tube providfd with the adjustable weir member of the invention; an

Fig. 5 is an exploded perspective view showing the parts of the weir member.

In the drawings, is the shell of a precipitator provided with gas inlets 11, a gas outlet 12 and a drain 13. A horizontal header sheet 14 divides the shell into a lower inlet space and an upper outlet space. Mounted in the header sheet 14 are a plurality of tubular collecting electrodes 15, which are positioned at their lower ends by structural grid members 16.

Discharge electrode wires 17 are centrally suspended in the collecting electrode tubes from beams 18 carried on insulating bushings 19 through which the discharge electrode system is energized. The discharge electrodes are maintained taut by weights 20 at their lower ends which are positioned by grid members 21.

Spray nozzles 22 are positioned about the upper portion of the shell and also in the sides thereof.

The collecting electrode tubes 15 are tightly welded into header plate 14, which forms with the walls of the shell 10 a pond adapted to hold a pond of water about the upper ends of the tubes. To simplify the leveling problem in large precipitators the pond is advantageously divided into a plurality of smaller ponds by partitions 23. The ponds are supplied with water by feeder pipes 24 which are provided with downwardly extending outlets 24a spaced across the ponds. Flushing boxes 25 are provided along the outer walls for Washing out the ponds periodically, the flushing water being drained through the drainpipes 26 which are provided in each of the ponds. By opening the drain plugs 27 and operating the overhead sprays, the ponds can be quickly cleaned of accumulations of sediment.

Mounted on the upper edge of each collecting electrode tube is an adjustable weir comprising an annular U-shaped member 28 and a clamping ring 29. As shown more particularly in Figs. 4 and 5, the U-shaped weir member has inner and outer skirts which fit over the upper ends of the tubes 15. The skirts are slotted to aid in fitting the weirs to the tubes. When the upper edges of the weirs 28 are set at the proper level, the weirs are firmly held in place by tightening the bands 29 by means of bolts 30. Instead of using bolts, snap rings may be used. While desirable, the bands 29 are not essential, as the weirs 28 may be made to fit tightly enough on the tubes to ma ntain the positions in which they are placed by the sprlng action of the slotted skirts.

The upper edge of weirs 28 are preferably bent outwardly to reduce the possibility of electrical discharge therefrom.

I claim:

1. In an electrical precipitator including a horizontal header, means cooperating with said header to provide a reservolr for washing liquid, and a plurality of vertically d1s posed tubular collecting electrodes projecting through sa d header and joined thereto by a gas and liquid tight oint, ad ustable weirs on the top ends of the tubular collecting electrodes comprising spaced concentric cylmdncal skirt members joined at their upper ends to define an annulus having a U-shaped cross section, at least the outer of said skirt members having axially extending slots m the lower end thereof, said skirt members being spaced apart to accommodate the upper portions of the tubular collecting electrodes, and fastening means adapted to urge the outer of said skirt members against the outside of the tubular collecting electrodes.

2. A welt comprising spaced concentric cylindrical skirt members oined at their upper ends to define an annulus ha v1ng a U-shaped cross-section, at least the outer of said sklrt members having axially extending slots in the lower end thereof and means for exerting an inwardly girected tightening force on the outer of said skirt memers.

3. A weir comprising spaced concentric cylindrical skirt members oined at their upper ends to define an annulus having a U-shaped cross-section, at least the outer of said skirt members having axially extending slots in the lower end thereof, a band around the outer of said skirt members, and fastenmg means for tightening the hand against the outer of said skirt members.

References Cited in the file of this patent UNITED STATES PATENTS 1,811,277 Mosley June 23, 1931 1,968,334 Crowder et al. July 31, 1934 2,147,786 Fenske et a1 Feb. 21, 1939 2,422,402 Gazda June 17, 1947 FOREIGN PATENTS 365,657 Great Britain Jan. 25, 1932 270,109 Switzerland Aug. 15, 1950