B - Operations – Transporting – 03 – C
Patent
B - Operations, Transporting
03
C
183/56
B03C 3/78 (2006.01) B03C 3/88 (2006.01)
Patent
CA 1102714
ABSTRACT OF THE DISCLOSURE The foam cleaning system for an electrostatic precipi- tator includes a source of a suitable detergent and means for introducing it into a foamer, a source of supply water which is piped through a water pressure reducing valve if necessary and then through a pressure gauge and solenoid valve control and through a suitable filter into the foamer, and a supply of compressed air which passes by suitable conduit through an air pressure regulator and solenoid valve control into the foamer. The detergent, water and air are suitably combined in the foamer and discharged therefrom as a foam into a manifold which will carry the foam to the electrostatic precipitators to be' cleaned. It is important that the foam which exits from the foamer be retained in a relatively long length of a suitable pipe or conduit before it is introduced into the upper regions of an electrostatic precipitator. If this last mentioned pipe or conduit is too short effective cleaning will not be achieved even when the same foamer and related apparati are employed. It is also important, when cleaning more than one electrostatic precipitator at a time, as will usually he the case for the reason that most installations include a plurality of such precipitators, that the manifold be arranged to take into account the fact that the stream of foam will, in effect, be divisible into two parts, but not three. The foam is introduced into a space provided at the top of the precipi- tator above the ionizer and collecting cell plates, between the inlet and outlet filters, and between the side walls of the precipitator. A drain is provided adjacent the precipitator. The top of the precipitator is filled with foam in a relatively short time until it is forced down the various plates in the ionizer and collecting cell at which time the foamer is turned off and the so introduced foam is permitted to penetrate and settle within the pre- cipitator for a somewhat longer period of time. Rinsing water is then introduced into the top of the precipitator and the spent foam, collected contaminants and rinse water are collected in a suitable sump and disposed to a sewer, reservoir or the like. Preferably the rinse water manifold system is separate from the foaming unit.
311579
Elsbernd Carl A.
Spurgin Wendell P.
Smart & Biggar
United Air Specialists Inc.
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