Deutsche Babcock Aktiengesellschaft

Deutsche Babcock Werke Aktiengesellschaft

Horst Buchmuller

Bernhard Michelbrink

Gerd Morawski

Helmut Benninghoff

A fluidized-bed furnace recirculates solids by way of one or more cyclone precipitators (6), the solids outlet of which communicates with the fluidized bed (4) by way of a trap (8) and a directly downstream chute (10). The coal intake opens into the chute. The outlet (9) from the trap (8) communicates with the chute (10) through a transitional section (11). The transitional section tapers out from the outlet from the trap and then in to the chute. The coal intake is above the wider section of the transitional section.

Fluidized-bed furnace that recirculates solids

In order to avoid caking of bulk material when feeding from a feeder into an inlet opening of lesser cross-section, there is provided a trough with a central discharge opening located below the discharge of the feeder. Two double paddle conveyors extend in the trough towards the central discharge opening. A vertical gravity tube joins on the trough. The tube is surrounded by one or several annular channels guiding a gaseous medium. This medium forms a gaseous screen between the bulk material flow and the gravity tube.

Arrangement for feeding bulk material tending to cake

Wet ash removal equipment in which a trough is filled with quenching water. An immersion member attached to the ash funnel is immersed into the quenching water. A side wall of the trough is sealed by a plate. The plate is supported upon a height-adjustable rod linkage and is guided in its movement on the side of the trough arrangements of rollers.

Wet ash removal equipment

A wet ash remover which has a trough arranged underneath the ash funnel of a boiler and is filled with quenching water. A quenching water feed and an overflow are also provided. Ash conveying equipment passes through the wet ash remover. A cooling device with quenching water circulating through it continuously, is located between the overflow and the quenching water feed. One or more sets of parallel oblique plates are located inside the trough in front of the overflow. The set or sets of plates may extend throughout the entire length side of the wet ash remover. The plates may be inclined 50 to 60 degrees from the horizontal, and the planes may be planar. One of the sidewalls of the displaceable trough is connected detachably to the remainder of the trough and rigidly to stationary supports; the sidewall is at least as long as the immersion piece of the ash funnel protruding into the trough. The sidewall may accommodate the overflow and the set or sets of plates.

Wet ash remover

An arrangement for hydraulic transport of precipitator dust in a precipitator plant, which is provided with several hoppers. These are consecutively arranged in flow direction of the gas to be cleaned passing through precipitator cells. The hoppers are located underneath a discharge device, and are provided with a sluice chamber having an inlet for rinse water and an outlet for a mixture of rinse water and precipitator dust. The exit of the sluice chamber of the rear hopper, in gas flow direction, is connected with the inlet of the sluice chamber of the preceding hopper by one sluiceway each. The sluice chamber of the last hopper, only, is supplied with fresh rinse water. The outlet gutter following the exit of the sluice chamber of the first hopper, may be closed by a weight-loaded flap.

Apparatus for the hydraulic transport of precipitator dust

An immersion plate fastened to the ash funnel of a steam generator combustion chamber and protruding into the water surface of a trough of a wet-ash remover filled with quenching water and located underneath the ash funnel. Carriers pass transversely through the immersion piece and are suspended by screws from the tubing of the funnel; a seal which is deformable in the direction of action of the screws is located between the immersion piece and the ash funnel. The cooled carriers may consist of two U-profiles welded together and the carrier ends outside the immersion pieces may be open. A U-shaped profile with the opening upwards is mounted on part of the carrier lying within the immersion piece. The sidewalls of the immersion piece may consist of several plate sections and each plate section has, at one edge, a slot for the edge of the adjacent plate, with play in the longitudinal direction. The screws are suspended pendulum-like from the ash funnel and the screw shanks pass through enlarged bores in the carrier; skirt-shaped support washers are located between the carrier and the nuts on the screws.

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Hunxe, Germany

Horst Buchmuller