Coke oven emission control system

Claim 2

In an apparatus for collecting particulate emissions discharged into the atmosphere in the presence of high temperature gases produced by a high temperature chemical reaction which includes a non-compartmented stationary housing defining an emissions entrapment zone positioned to receive such emissions and having a peaked roof including end panels and outwardly and downwardly extending first and second roof panels which are higher than the source of said emissions, the first of said roof panels extending from the peaked roof to a point over or beyond the source of said emissions, and the second roof panel extending from the peaked roof in a direction away from the source of said emissions, the lower edge of the roof panels also being higher than the source of said emissions, and a suction duct positioned at or near the apex of the roof, the improvement which comprises providing: a. at least one panel extending inwardly and downwardly from the lower portion or edge of said second roof panel to a plane above the source of said emissions; b. a substantially vertical wall panel extending downwardly from the lower portion or edge of said first roof panel to a point immediately above the source of said emissions; c. a panel extending inwardly and upwardly from about the lower edge of said first roof panel and above the source of said emissions; the upper part of said housing comprising said roof panels, said end panels and the (a), (b) and (c) panels constituting a zone for thermal expansion of the gases and for particulate classification and fallout; d. a suction duct positioned in the upper part of said expansion zone and having a progressively increasing cross-sectional area as the duct approaches the suction end thereof; and e. air scoops, projecting from openings along the length of said duct, having leading edges opposed to the direction of gas flow in the duct and being positioned in a manner to substantially balance the gas pressure throughout said duct when suction is applied thereto in order to produce a negative pressure in the duct to evacuate particulates and gases from said thermal expansion zone.

Claim 3

In an apparatus suItable for collecting emissions resulting from leaking doors and coke pushed on the coke side of a coke oven battery through a coke guide and into a coke quench car positioned to travel generally parallel to said battery and located to receive coke when it is discharged, said apparatus including a non-compartmented stationary housing, defining an emissions entrapment area, disposed in front of the coke side of said battery and extending along the length thereof and covering the coke guide and quench car areas along said battery, and having a peaked roof higher than said battery which roof includes end panels and outwardly and downwardly extending first and second roof panels, said first roof panel extending above at least the buckstay on the coke side of the said battery, and said second roof panel extending above and beyond the quench car area, and a suction duct positioned at or near the apex of the roof, the improvement which comprises providing: a. a third panel extending downwardly and inwardly toward the quench car area from the lower longitudinal edge of said second panel; b. a substantially vertical wall member depending downwardly from the lower portion of said first roof panel down to the top or buckstay of said battery; c. a substantially vertical wall member depending from the lower portion or longitudinal edge of said third panel to a position or plane between slightly above the top of the quench car to close to the grade on which the quench car is positioned; d. an inwardly and upwardly extending thermal shield panel overlaying the coke guide area and which extends the length of the housing and forms a portion of the upper expanded area of said housing; the upper part of said housing comprising said end panels and said first, second and third panels and said thermal shield panel constituting a zone for thermal expansion of the gases and for particulate classification and fallout; e. a suction duct positioned in the upper portion of said expansion zone and having a cross-sectional area which increases as the duct approaches a suction means which produces a negative pressure in said duct; and f. air scoops projecting from openings along the length of said duct, having leading edges opposed to the direction of gas flow in the duct and being positioned in a manner to substantially balance the gas pressure throughout said duct when suction is applied thereto to produce a negative pressure in said duct to evacuate particles and gases from said thermal expansion zone.

Claim 4

In an apparatus suItable for collecting emissions resulting from leaking doors and coke pushed on the coke side of a coke oven battery through a coke guide and into a coke quench car positioned to travel generally parallel to said battery and located to receive coke when it is discharged, said apparatus including a non-compartmented stationary housing, defining an emissions entrapment area, disposed in front of the coke side of said battery and extending along the length thereof and covering the coke guide and quench car areas along said battery, and having a peaked roof higher than said battery which roof includes end panels and outwardly and downwardly extending first and second roof panels, said first roof panel extending above at least the buckstay on the coke side of the said battery, and said second roof panel extending above and beyond the quench car area, and a suction duct positioned at or near the apex of the roof, the improvement which comprises providing: a. a third panel extending downwardly and inwardly toward the quench car area from the lower longitudinal edge of said second panel; b. a substantially vertical wall member depending downwardly from the lower portion of said first roof panel down to the top or buckstay of said battery; c. a substantially vertical wall member depending from the lower portion or longitudinal edge of said third panel to a position or plane between slightly above the top of the quench car to close to the grade on which the quench car is positioned; d. an inwardly and upwardly extending thermal shield panel overlaying the coke guide area and which extends the length of the housing and forms a portion of the upper expanded area of said housing; the upper part of said housing comprising said end panels and said first, second and third panels and said thermal shield panel constituting a zone for thermal expansion of the gases and for particulate classification and fallout; e. a suction duct positioned in the upper portion of said expansion zone and having a cross-sectional area which increases as the duct approaches a suction means which produces a negative pressure in said duct; and f. air scoops projecting from openings along the length of said duct, having leading edges opposed to the direction of gas flow in the duct and being positioned in a manner to substantially balance the gas pressure throughout said duct when suction is applied thereto to produce a negative pressure in said duct to evacuate particles and gases from said thermal expansion zone.

Claim 5

An apparatus according to claim 2, wherein the suction duct forms part of the ridge of the roof of the expansion zone.

Claim 6

An apparatus according to claim 2, wherein the air scoops consist of the sections obtained by cutting a cylinder diagonally and the resulting scoops are affixed to the duct over openings therein so that the semi-circle end of the scoop points in a direction opposed to the direction of gas flow in the duct when the duct is under negative pressure.

Claim 7

An apparatus according to claim 3, wherein the air scoops consist of the sections obtained by cutting a cylinder diagonally and the resulting scoops are affixed to the duct over openings therein so that the semi-circle end of the scoop points in a direction opposed to the direction of gas flow in the duct when the duct is under negative pressure.