OPERATION OF INJECTED LIQUID-AIR MIXING TYPE SUCTION DEVICE

PURPOSE:To obtain easy starting by introducing steam into a gas inlet pipe and enclosing liquid injection flow injected from a liquid injection pipe by the steam. CONSTITUTION:The steam supplied through a steam inlet pipe 13 is introduced into a discharge pipe 12 by propulsive force of jet flow A injected through a liquid injection pipe 14 and moves forward with the jet flow A, while forming a layer B around the jet flow A. By making contact with the jet flow A at a normal temperature, the steam layer B is cooled and gradually condensed in droplet, as it moves forward. Thus, as the jet flow A goes apart from the outlet of the injection pipe 14, the steam layer is less influenced by enclosing effect of steam layer B and no factor of preventing generation of negative pressure remains in the vicinity of the outlet of an intake pipe 11, resulting in easy generation of negative pressure.