GB110774A - Improvements in Apparatus for Extracting Dust from Gases and Vapours, applicable also for Collecting Particles of Flour, Cement and other Substances. - Google Patents

Abstract

110,774. Gallot, G. A., and Poussin, P. M. N. Sept. 28, 1916. Gases and vapours, electrically precipitating suspended particles from.- In apparatus for separating dust or liquid pacticles from gases and vapours, comprising a tubular perforated electrode and an inner electrode, the distribution of the electric field is improved and sparking at the ends of the electrodes is checked by placing insulating material between the electrodes at their ends, or by tapering or rounding off the ends of the inner electrode when this is cylindrical. Efficiency is thus increased, and the use of longer electrodes and higher electric pressures facilitated. The inner electrode may be a wire g, surrounded near the ends of the outer electrode d by insulators i, i<1> of glass, mica, ebonite, &c., which may be mounted on the wire or carried by bridges across the outer electrode. The outer electrode may be cylindrical throughout or flared at its ends. In the multiple arrangement shown, the gas traverses the outer electrodes from a common settling chamber a and pipe b. Dust &c. passes through the perforations in the outer electrodes into spaces f. The wire electrodes are supported by two rods k. k<1>. In another arrangement, the inner electrode is a tubular body with hemispherical ends. An electrode of similar outline may be constructed of metal strips projecting radially from a cylindrical body which has circumferential ribs to check the flow of gas between the strips. At their ends, the strips are bent to meet at two points in line with the axis of the cylindrical body. A number of wires mav be connected at two end points and spread by transverse disks to form a cylindrical cage with conical ends. A wire-gauze cylindrical electrode is mentioned. The electrodes may be vibrated to keep them clean. They may be charged by electrostatic machines, induction coils with rotary commutators and valves of the disk- and-point or rarefied-gas type, or static transformers with synchronous commutators or incandescent-cathode rectifiers. Condensers are placed in parallel with the separator. The apparatus may be used for removing smoke, poisonous dust, lead oxide, zinc powder, cement, plaster, flour, or kaolin from air, or carbon from gases in porcelain furnaces. Reference has been directed by the Comptroller to Specifications 109,227 and 120,573.