A steam boiler liquid separator having a plurality of liquid separator segments connected together to form a shaft disposed inside a pipe section, with swirl vanes disposed around the shaft. The liquid separator segments each include a shaft segment connected to a pipe segment by a swirl vane such that the shaft segment is disposed radially inward from the pipe segment.

According to at least some example embodiments, a dome collector separation stage includes an inner side wall that defines an inner channel; and an outer side wall that, together with the inner side wall, defines an outer channel, the inner channel being configured to receive a two-phase flow stream (FS) of water and steam, and pass the two-phase FS to the outer channel via inlets included in the inner side wall, the outer channel being configured to separate at least some water from the two-phase FS, and pass moisture-reduced steam out of the steam separator stage via outlets included in the outer side wall.

A steam boiler liquid separator having a plurality of liquid separator segments connected together to form a shaft disposed inside a pipe section, with swirl vanes disposed around the shaft. The liquid separator segments each include a shaft segment connected to a pipe segment by a swirl vane such that the shaft segment is disposed radially inward from the pipe segment.