Alstom (switzerland) Ltd

Alstom Technology Limited

James F Durant

Kurt W Johnson

Glen Jukkola

Herbert E Andrus, Jr

David J Matteson

John E Ferguson

Peter Stromberg

Ferdinand A Ruszala

Reed S C Rogers

Glen D Jukkola

Reed SC Rogers

A system for effecting the pretreatment therewith of a sorbent comprising a conveying line (), such as a pipe, and a plurality of solution nozzles operative for purposes of introducing a solution to treat the sorbent. More particularly, the conveying line () includes an inlet (), an outlet (), and an inner surface () that is operative to define a passageway () through which sorbent particles are capable of being transported between the inlet () of the conveying line () and the outlet () of the conveying line (). Each of the plurality of solution nozzles includes a respective one of a plurality of orifices () that are designed to be disposed circumferentially about the inner surface () of the conveying line () and that are designed to be operative to effect therewith the injection of an aqueous solution of a liquid sorbent conditioner into the passageway () in order to thereby effect therewith the pretreatment of sorbent particles that are being transported through the passageway () in the conveying line ().

Injection of liquid sorbent conditioning into a sorbent transporting passageway

A sorbent conditioning and direct feed apparatus is provided for direct feeding of a conditioned solid sorbent to a combustor . The sorbent conditioning and direct feed apparatus includes raw solid sorbent storages means , particle size reducing means for reducing the particle size of solid sorbent supplied thereto from a relatively larger coarse particle size to a relatively smaller fine particle size, metering means for metering the supply of raw solid sorbent from the raw solid sorbent storage means to the particle size reducing means , and transport means for transporting solid sorbent which has been conditioned by the particle size reducing means to the combustor , whereby conditioned solid sorbent is fed to the combustor without any intermediate storage of the solid sorbent between the raw solid sorbent storage means and the transport means

Sorbent conditioning and direct feed apparatus for a steam generator and a method for retrofitting a steam generator with same

The present invention provides, according to one aspect thereof, a computer controlled process for reducing SO from a flue gas. The process includes the basic steps of providing an aqueous treatment solution containing an inorganic salt and a control unit for controlling the introduction of the aqueous treatment solution containing an inorganic salt and controlling the control unit in response to a computer program to effect introduction of the aqueous treatment solution into contact with alkaline earth material. Thereafter, the process includes heating the alkaline earth material in the presence of the flue gas containing SO to remove the SO . The alkaline earth material may be limestone or dolomite. The inorganic salt is selected from the group consisting of thermally decomposable sodium compounds including sodium carbonate, sodium bicarbonate, sodium hydroxide, sodium nitrate, and sodium acetate. In selected applications of the process of the present invention, the inorganic sodium compound has a concentration of between 0.05 to 5 percent of the limestone or dolomite. In preferred applications of the method, the inorganic sodium compound has a concentration of between 0.05 to 1 percent of the limestone or dolomite.

Process for enhancing the sulfur capture capability of an alkaline earth material

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Windsor, CT, United States of America

James F Durant