Abb Carbon Ab

Asea Ab

Mats Andersson

John Weatherby

Roine Br&auml;nnstr&ouml;m

Christopher Adams

Jim Anderson

Lennart Hjalmarsson

Goran Tjellander

Lotta Lindgren

Ingemar Greis

Hans-Jorgen Damsgaard

Christer Gerward

Henrik Wallman

Marie Andersson

Olle Nystrom

Peter Halse

Sven Ohlsson

Kenneth Arvidsson

A method of combustion and a combustion plant in which absorbent is regenerated is described herein. During the combustion of a fuel in a combustion chamber enclosing a fluidized bed, a fuel and an absorbent are supplied to the fluidized bed. The combustion gases generated during the combustion are collected and purified in a separating member by separation of solid material from the combustion gases. The separated solid material is recirculated to the fluidized bed through a channel, and a gaseous medium is supplied in a controlled manner to the separated solid material present in the channel in order to displace the combustion gases and provide a chemical reaction.

Method of combustion and a combustion plant in which absorbent is regenerated

A method of combustion in a pressurized, fluidized bed and in the freeboard thereof. The combustion method is further characterized by the recirculation of solid sulfur absorbing materials. A gas channel, designed so as to prevent fluidizing gas from entering the channel from below, is provided such that it opens to the freeboard and to a separating member which separates particulate matter from the combustion gasses.

Method and apparatus for burning fuel in the free board of a pressurized fluidized bed with solids recirculation

A method for maintaining a nominal working temperature of flue gases during operation of a PFBC power plant having a pressure vessel with a combustor enclosed therein for combustion of a fuel in a fluidized bed, a gas turbine for receiving flue gases formed during the combustion in the combustor, a compressor driven by the gas turbine for compression of air which is utilized as combustion air during the combustion in the combustor, and a steam turbine driven by steam generated in tube bundles in the bed, includes the steps of burning a complementary fuel in the flue gases generated during the combustion in the fluidized bed downstream of the tube bundle for increasing the flue gas temperature to a nominal level for the process and using oxygen residues in the flue gas as oxidizing agents during combustion of the complementary fuel.

Method of maintaining a nominal working temperature of flue gases in a

Method and a device in a PFBC power plant

Method for reducing the emission of NO.sub.x in a combustion process

Fluidized bed combustor, equipped with means for improving the

In the event of an operational disturbance in a turbine-compressor unit of a PFBC plant, the turbine and the compressor are isolated from the bed vessel of the plant by closing a valve in the gas supply conduit to the turbine and by closing a valve in the conduit leading from the compressor. At the same time a valve is opened in a by-pass conduit between the compressor and the turbine. Combustion air is allowed to escape into the atmosphere via one or more blow-off valves. The bed vessel and/or a space between the pressure vessel and the bed vessel are supplied with inert gas in such a way that combustion in the bed is damped down.

Method of controlling a PFBC plant in the event of operational

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Finspong, Sweden

Mats Andersson