CIRCULATING FLUIDIZED BED REACTOR Russian patent published in 2004 - IPC

FIELD: circulating fluidized bed reactors.

SUBSTANCE: proposed reactor has furnace whose bottom part is provided with gas nozzles for fluidizing bet material supplied thereto, this furnace being bounded by vertical and flat first walls; particle separator designed to separate bed material from gas escaping from reactor; return channel for bed material coming from particle separator that communicates with first wall and has bottom part; gas seal disposed in bottom part of return channel that functions to prevent gas passage from furnace to return channel; intake cavity bounded by flat wall of water tube. Intake cavity may function as mentioned furnace with water tube wall being used as front wall or cavity communicating through gas flow passage with furnace; gas seal is joined with water tube wall that confines intake cavity so that horizontal cross-sectional area width of return channel bottom part, as measured in direction of first wall, is greater than depth perpendicular to mentioned width; gas seal has structural members incorporating water tube which are joined together and formed by water tubes bent out from water tube wall confining intake cavity; structural members separate certain part from circulating material bed in bottom part of return channel and form gas-seal channel bounded by seal structural members whose bottom parts have flow passage means communicating with return channel and in essence by front vertical wall whose upper part passes return flow through hole made in water tube wall confining intake cavity; mentioned structural members have side wall joined with front one and water tubes in water tube wall confining intake cavity which are bent out to cool down side wall and to form supporting structure for the latter. Structural members incorporate water tubes joined together and bent out from those in water tube wall confining intake cavity which are used to support water tube wall and to prevent reduction of water tube wall strength due to return hole.

EFFECT: reduced mass and enhanced strength and reliability of gas seal, improved distribution of bed material circulating between gas seal and intake cavity wall.

15 cl, 9 dwg