Alstom Technology Limited

Michael G Varner

Kelly L Barger

Dennis James Laslo

David K Anderson

David James Muraskin

Michael J Rini

Gregg R Doule

Michael Chiang

Gregg Robert Doulé

A system for fluidizing ash in a duct of a selective catalytic reduction system. The system includes a duct, a source for generating compressed air, and an air injection header joined with the source and joined with the duct via one or more holes in the duct. The air injection header is adapted to inject compressed air from the source to the areas of the duct prone to dust build-up. The air injection header includes a sub-header joined with a plurality of injection lances. Each of the plurality of injection lances has an end nozzle. The end nozzle may have a mushroom cap or an angled end configuration to direct air in a particular direction.

Ash fluidization system and method

One embodiment described herein relates to a system for removing pollutants from a flue gas. The system includes a selective catalytic reduction (SCR) system having a SCR reactor containing a NOreducing catalyst and one or more SCR protective devices. At least one of the SCR protective devices is connected to a rapping hammer system that actively remove fly ash collected on the SCR protective devices.

Device and method for cleaning selective catalytic reduction protective devices

One aspect of the invention relates to a method for removing contaminants from a flue gas stream (). The method includes: removing fly ash from a flue gas stream () utilizing a particle collector (); contacting the flue gas stream with an alkaline reagent in a wet scrubber (); discharging a purge liquid () from the wet scrubber (); and, combining at least a portion of the purge liquid with at least a portion of fly ash circulating within a dry circulating fluid bed scrubber () to form moistened fly ash ().

Reduced liquid discharge in wet flue gas desulfurization

A system for separating sulfur dioxide from a gas using an aqueous absorption liquid. The system includes a housing, an apertured plate, an outlet box, a distribution mechanism, a container, and a pump. The housing has an inlet and an outlet. The apertured plate is positioned between the inlet and the outlet and includes a lower side, an upper side, and apertures fluidly connecting the lower and upper sides. The outlet box includes a distribution mechanism that is arranged so that the absorption liquid draining from the outlet box contacts the gas from the inlet before the gas passes through the apertures in the apertured plate. The container contains the absorption liquid and is fluidly connected with the housing. The pump draws the absorption liquid from the container through the pump and through a conduit to the upper side of the apertured plate.

Method and device for separation of sulphur dioxide from a gas

One aspect of the invention relates to a method for removing contaminants from a flue gas stream (). The method includes: removing fly ash from a flue gas stream () utilizing a particle collector (); contacting the flue gas stream with an alkaline reagent in a wet scrubber (); discharging a purge liquid () from the wet scrubber (); combining at least a portion of the purge liquid () with at least a portion of the fly ash () to form moistened fly ash (); and injecting at least a portion of the moistened fly ash () into the flue gas stream () upstream of the particle collector (), whereby the moistened fly ash () removes at least a portion of contaminants present in the flue gas stream ().

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Knoxville, TN, United States of America

Michael G Varner