Abstract: An injector for a high temperature gas distribution means comprising a distribution manifold having a heat-resistant lining with a central passage therethrough, and a refractory-lined injector communicating with the distribution manifold. The injector includes a nozzle disposed external to the manifold having a central opening and an inlet extending from the nozzle to the central passage. The cross-sectional area of the central opening in the nozzle in the direction of flow is smaller at least at one point than that of the inlet such that a major portion of the pressure drop in the gas flowing from the central passage through the inlet and the nozzle is created by the nozzle. By disposing the nozzle external to the distribution manifold, the flow rate of gas through cracks in the heat resistant manifold lining is minimized.

Abstract: A gas distributor for distributing high temperature reaction gases to a fluidized bed of coal particles in a coal gasification process. The distributor includes a pipe with a refractory reinforced lining and a plurality of openings in the lining through which gas is fed into the bed. These feed openings have an expanding tapered shape in the downstream or exhaust direction which aids in reducing the velocity of the gas jets as they enter the bed.