Abb Carbon Ab

Abb Stal Ab

Asea Stal Ab

Asea Stal Aktiebolag

Arne Jonsson

Harald Svendsen

Sven-Olov Stman

Tubing assembly unit for boilers for use in connection with combustion

Boiler for a combustion plant having a pressurized fluidized bed

PFBC power plant

Power plant with combustion of a fuel in a fluidized bed

A fuel burning power plant comprises a bed vessel with a bottom grate which divides the bed vessel into an upper combustion chamber and a lower part with at least one ash chamber. The bed grate consists of parallel air distribution tubes each with air nozzles, between which tubes gaps are provided where bed material may pass from the combustion chamber down to the ash chamber. Below the tubes there is a transverse air distribution chamber. The tubes are connected in groups to the air distribution chamber by a double-walled sleeve extending down from the tubes.

Fluidized bed fuel-fired power plant

A power plant with combustion of a fuel in fluidized bed (21) of particulate material, usually contains a sulphur absorbent. A bottom (14) divides a bed vessel (12) into an upper combustion chamber (15) and a lower conical or pyramid-shaped ash discharge chamber (16) for discharging ashes and consumed bed material. The bottom (14) is formed with openings (22) through which material is able to pass. Cooling air is supplied to the lower part of the lower chamber (16). This chamber (16) is provided with grates (37, 38) with horizontal channels (46) for spreading cooling air from the central part of the chamber (16) to its outer parts. These grates (37, 38) may be formed of U-sections with their openings facing downwards. The channels (46) of a grate (37) may be connected to the combustion chamber (15) by vertical tubes (50).

The corners of the walls of a vessel in which fuel is burnt in the fluidized bed of a PFBC power plant are articulately connected to a supporting framework. The forces arising on the bed vessel walls are taken up by the framework and are transmitted to the framework by means of a plurality of links. At each corner the construction of links allows the corner to be displaced in relation to the framework. This corner-connection includes auxiliary beams which are substantially parallel to the walls and are at one of their ends articulately connected to the framework.

Fluidized bed combustion chamber in a power plant

Growing community of inventors

Finspong, Sweden

Arne Jonsson