Steam-water separator arrangement

A drum including wall means defining an upper vapor space and a lower liquid space, means for supplying a vapor-liquid mixture of the drum, vapor-liquid separating means disposed within the drum and having a vapor outlet communicating with the vapor space and a liquid outlet communicating with the liquid space, the separating means being mounted on a duct extending centrally of the drum, the duct having an open bottom immersed in the liquid space, the liquid surface level externally of the duct being higher than the liquid surface level within the duct due to pressure loss through the separating means, the duct being sized to insure that the vertical distance between the open bottom and the liquid surface level externally of the duct is greater than the difference in liquid surface levels resulting from the maximum pressure loss through the separating means, conduit means connected to the vapor-liquid supply means, the conduit means extending through the open bottom to discharge the vapor-liquid mixture at a location above the liquid surface level within the duct, at least one opening extending through the drum wall means, the opening being sized to allow removal therethrough of the duct with the separating means mounted thereon, and a detachable closure means covering said opening.