Electro-precipitators

Claim 2

In a Cottrell electro-precipitator, a collector electrode assembly comprising A plurality of spaced collector electrodes and bracing means bracing the electrodes together, each electrode comprising a plurality of elements, each comprising a plate member which comprises, in profile, a substantially straight central portion and two bent end portions extending from either end of the central portion, each bent end portion engaging an adjacent bent end portion of an adjacent element, and each bent end portion comprising a surface which, in profile, is generally inclined at an angle greater than 90* to said central portion and engages a corresponding surface of the said adjacent bent end portion, and means for directly and positively securing the adjacent bent end portions together; the assembly also comprising a plurality of collector electrode support members, and means for securing each electrode of said assembly to a said collector electrode support member from which the electrode extends downwardly when the assembly is in use, and wherein the bracing means connects together adjacent support members of different collector electrodes of said assembly; said bracing means comprising a tubular assembly which extends between two adjacent support members and comprises two outer tubular members, one secured to each support member and said two tubular members being opposite and aligned, a further, inner tubular member aligned with and extending between said two aligned tubular members and a fastener extending through the three aligned tubular members to secure said tubular members together.

Claim 3

An electrode assembly according to claim 1 wherein in each collector electrode each said surface is flat and said surfaces are in superficial engagement.

Claim 4

An electrode assembly according to claim 1, wherein in each collector electrode each bent end portion comprises a straight central part providing said surface and extending across the plane of the straight central portion of the plate member, a straight part which is inclined to the straight central portion of the plate member and leads therefrom to the central part, and a hook-shaped end part which leads from the central part in a direction generally away from the adjacent bent end portion.

Claim 5

An electrode assembly according to claim 3 wherein in each collector electrode the bent end portions define pockets adapted to face the direction of gas flow.

Claim 6

An electrode assembly according to claim 3 wherein in said collector electrode each surface is inclined at an angle of about 120* to the central portion.

Claim 7

An electrode assembly according to claim 1 wherein in each collector electrode each bent end portion comprises a straight central part providing said surface and extending across the plane of the straight central portion of the plate member, a straight part which is inclined to the straight central portion of the plate member and leads therefrom, a curved part which leads from said last-mentioned straight part to said central part, and a curved end part which leads from the central part generally along the contour of the adjacent bent end portion.

Claim 8

An electrode assembly according to claim 6 wherein in said collector electrode each surface is inclined at an angle of about 105* to the central portion.

Claim 9

An electrode assembly according to claim 1 wherein in each collector electrode the securing means comprises load-bearing non-reversible fasteners extending through said surfaces of the bent end portions.

Claim 10

An electrode assembly according to claim 1 wherein in each collector electrode each surface is inclined at an angle between 95* and 175* to the central portion.

Claim 11

A collector electrode assembly according to claim 1 comprising two,only, collector electrodes.

Claim 12

An electro-precipitator comprising a casing, a plurality of spaced collector electrode assemblies, a plurality of discharge electrodes located in spaces between the collector electrodes of the assemblies, and means For supporting the collector electrodes and discharge electrodes in the casing each collector electrode assembly comprising (a) two upper horizontally elongated tubular support members (b) two lower horizontally elongated support members (c) two vertical generally planar parallel collector electrodes each of which is secured to a said upper support member from which the collector electrode extends downwardly and which electrode is also secured to a said lower support member from which the collector electrode extends upwardly, and (d) bracing means connecting together the support members of said assembly said bracing means comprising a tubular assembly which extends between the support members at right angles thereto and comprises two horizontal tubular members one secured in each support member said two tubular members being opposite and aligned, a further tubular member aligned with and extending between said two aligned tubular members and a fastener extending through the three aligned tubular members to secure said tubular members together; each collector electrode comprising (i) a plurality of elements each comprising a plate member which comprises (in profile) a substantially straight central portion and two bent end portions extending from either end of the central portion and each bent end portion engaging an adjacent bent end portion of an adjacent element, and each bent end portion comprising a surface which (in profile) is generally inclined at an angle greater than 90* to said central portion, whereby access of fastening means is facilitated, and engages a corresponding surface of the said adjacent bent end portion and (ii) means for directly and positively securing the adjacent bent end portions together; each collector electrode together with its upper and lower support members providing a stressed skin-deep beam construction.

Claim 13

An electro-precipitator comprising a casing, a plurality of spaced collector electrode assemblies, a plurality of discharge electrodes located in spaces between the collector electrodes of the assemblies, and means For supporting the collector electrodes and discharge electrodes in the casing each collector electrode assembly comprising (a) two upper horizontally elongated tubular support members (b) two lower horizontally elongated support members (c) two vertical generally planar parallel collector electrodes each of which is secured to a said upper support member from which the collector electrode extends downwardly and which electrode is also secured to a said lower support member from which the collector electrode extends upwardly, and (d) bracing means connecting together the support members of said assembly said bracing means comprising a tubular assembly which extends between the support members at right angles thereto and comprises two horizontal tubular members one secured in each support member said two tubular members being opposite and aligned, a further tubular member aligned with and extending between said two aligned tubular members and a fastener extending through the three aligned tubular members to secure said tubular members together; each collector electrode comprising (i) a plurality of elements each comprising a plate member which comprises (in profile) a substantially straight central portion and two bent end portions extending from either end of the central portion and each bent end portion engaging an adjacent bent end portion of an adjacent element, and each bent end portion comprising a surface which (in profile) is generally inclined at an angle greater than 90* to said central portion, whereby access of fastening means is facilitated, and engages a corresponding surface of the said adjacent bent end portion and (ii) means for directly and positively securing the adjacent bent end portions together; each collector electrode together with its upper and lower support members providing a stressed skin-deep beam construction.