The Babcock & Wilcox Company

Mcdermott Technology, Inc.

Hudson Products Corporation

Thomas W Strock

Wadie F Gohara

George B Watson

George Edward Kluppel

Randy J Reynolds

John Ronald Cline

Paul Dykshoorn

George S Millas

John Lawrence Berg

William Joseph Oberjohn

Denis W Johnson

Frederick L White

James David Goldsmith

Fred G Russell

A method and device for using the density control water to continuously flush the oxidation air header and the sparge pipes in a flue gas wet scrubber agitation tank. The density control line is routed to the elevation where the control valve is located. A U-shaped trap is located between the control valve and air sparge header such that the density control water joins the humidified oxidation air. A liquid layer forms on the floor of the header and is moved toward the distant side of the header by the motion of the air passing on top of the liquid layer and by the continuous flow of water. The bottom section of the main header is perforated to allow the flowing water to exit the header into the tank and flush any accumulated solids that might penetrate the header through the air holes. The air holes are located in a section at a minimum of five degrees off the floor and maximum of one hundred eighty degrees off the header bottom and preferably at forty-five degrees. The distant end of the header has an opening located close to the header floor to provide an outlet for the flushed solids and prevents the formation of back waves in the header.

Method and apparatus for air sparged slurry tanks

A device for using the density control water to continuously flush the oxidation air header and the sparge pipes in a flue gas wet scrubber agitation tank. The density control line is routed to the elevation where the control valve is located. A U-shaped trap is located between the control valve and air sparge header such that the density control water joins the humidified oxidation air. A liquid layer forms on the floor of the header and is moved toward the distant side of the header by the motion of the air passing on top of the liquid layer and by the continuous flow of water. The bottom section of the main header is perforated to allow the flowing water to exit the header into the tank and flush any accumulated solids that might penetrate the header through the air holes. The air holes are located in a section at a minimum of five degrees off the floor and maximum of one hundred eighty degrees off the header bottom and preferably at forty-five degrees. The distant end of the header has an opening located close to the header floor to provide an outlet for the flushed solids and prevents the formation of back waves in the header.

Apparatus for air sparged slurry tanks

An air sparger assembly for a flue gas desulfurization wet scrubber agitation tank that eliminates the need for a mixer and reduces the amount of piping required. The air sparge pipes are arranged to be concentric with the agitation tank. A single main header provides air to the air sparge pipes. The discrete location of the air discharge holes in the sparge pipes utilizes the buoyant energy of the oxidation air to mix the slurry in the agitation tank.

Wet scrubber oxidation air sparger arrangement

An integral deaerator for a heat pipe steam condenser has a main steam duct connected to a heat pipe steam condenser duct by a riser. The heat pipe steam condenser duct is inclined slightly toward the riser and a weir is positioned at the connection between the riser and heat pipe steam condenser duct to prevent condensate from draining directly into the riser. The heat pipe steam condenser duct has a drain for draining a condensate from within the heat pipe steam condenser duct to a distribution header for distributing the condensate within the riser. Steam is provided to the main steam duct for condensation in the heat pipe steam condenser and while in transit, the steam heats and deaerates the condensate. At least one drain boot is connected to the bottom of the main steam duct for draining deaerated condensate.

Integral deaerator for a heat pipe steam condenser

A two-stage steam condenser that prevents freezing from occurring in the tube rows by continual purging of the tube rows. Such continual purging prevents any steam from back-flowing into a tube row thereby eliminating the possibility that condensate or noncondensable gases will become trapped therein. This is achieved by isolating each of the tube rows in the second stage of the condenser so that the pressure of one tube row is not exposed to the pressure occurring in another adjacent tube row. The condensate collected in the various tube rows of this second stage is delivered to a common drain pot that is hydraulically balanced to accommodate the various pressures in these tube rows. Such hydraulic balancing also prevents any back-flowing from occurring from one tube row into another. Furthermore, in this second stage of the steam condenser, the steam and resulting condensate both flow concurrently downward while any noncondensable gases are vented counter-currently upward against such steam and condensate flow.

Steam condensing apparatus with freeze-protected vent condenser

An air-cooled steam condensing module with an integral vent condenser has a steam header, one or more rows of condensing tubes between the steam header and a (generally lower) common condensate header. The module also has at least one row of vent condenser or dephlegmator tubes located adjacent the condensing tubes which connect the lower header to a vent header. The dephlegmator tubes may be of the same or larger diameter than the condensing tubes.

Steam condensing module with integral, stacked vent condenser

A wet flue gas desulfurization scrubbing tower has means therein for evenly distributing the flue gas flowing through the tower for more efficient treatment therein including a ring plenum for evenly exhausting the flue gas around the periphery of the tower through a series of differently sized openings and a centrally located annular opening for evenly exhausting the flue gas to the center of the tower.

Wet flue gas scrubber having an evenly distributed flue gas inlet

A forced recirculation of a part of the untreated flue gas is established along the inside wall of a dry scrubber by providing a counterflowing gas flow along the length of a dry scrubber housing wall to prevent deposition of wet particulate material on the inside walls caused by recirculation of particulates and flue gas thereon.

Dry scrubber with forced recirculation

An arrangement for uniformly distributing a liquid slurry across a flow path at a selected level of a housing. This invention incorporates a plurality of supply headers located adjacent the housing at that level of the housing for supplying the liquid slurry to the housing. A plurality of feeder lines extend from each of these supply headers across the flow path at this level of the housing. The feeder lines from one such supply header are arranged so as to be vertically displaced directly atop the feeder lines from an adjacent supply header. Thus, the feeder lines from the separate supply headers extend in a parallel, in-line relationship one atop the other thereby reducing the blockage of the flow path. Nozzles extend in a staggered fashion from these feeder lines and are off-set with respect to each other. The staggering of the nozzles is provided so that the spray from the nozzles coupled to the upper feeder lines do not impinge directly on the structure of the lower feeder lines.

Stacked interspacial spray header for FGD wet scrubber

An absorber tower that is configured to progressively increase the flow of the flue gas therethrough. This is accomplished by reducing the cross-sectional area of the tower (either continuously or in steps) thereby forcing the gas to increase in velocity as it travels toward the exit conduit.

Scrubbing method and apparatus incorporating progressively increased gas

A device for deflecting a liquid slurry flow in a housing away from an inlet flue conveying hot flue gas to the housing, the device having an upper surface and communicating with the housing at an inner wall of the housing. An inlet awning having a bottom portion horizontally extends into the housing from an upper surface of the inlet flue. An inclined top portion is connected to the bottom portion and an inner wall of the housing, the top portion extending upwardly at an incline from the bottom portion to the inner wall of the housing, the top portion having sufficient area to collect liquid slurry in excess of that required to achieve instant cooling and humidification of the hot flue gas, the top and bottom portions forming a tip at an area where the top portion is connected to the bottom portion. An extension outwardly extends from the tip of the inlet awning and slightly below the bottom portion of the inlet awning in order to deflect the liquid slurry flow away from the bottom portion of the inlet awning to keep the bottom portion dry and thereby prevent build-up of slurry deposits at the inlet flue.

Growing community of inventors

Jackson Township, OH, United States of America

Thomas W Strock