Moisture separator-reheater

In a moisture separator-reheater having a horizontally disposed shell and at least a first tube bundle extending longitudinally from a tube sheet into the shell, the improvement comprising

• a vertical plate extending to partition the shell near the tube sheet;
• a pressure relief opening through said vertical plate;
• and
• a flapper plate hinged to said vertical plate to fill said pressure relief opening.

A moisture separator-reheater comprising

• a horizontally disposed shell;
• a moisture separator;
• at least one longitudinally extending tube bundle including a plurality of tubes, each said tube having a feed leg, a horizontally disposed U-bend and a return leg;
• an inlet common to each said tube of said tube bundle;
• an outlet common to each said tube of said tube bundle;
• shell side inlet means;
• and
• shell side outlet means, said shell side inlet means and said shell side outlet means allowing steam flow upwardly through said shell,
• the lowermost of said tubes being of larger diameter and the uppermost of said tubes being of smaller diameter and the uppermost of said return legs having integrally formed, outwardly disposed fins, the lowermost of said return legs being smooth walled.

A moisture separator-reheater comprising

• a cylindrical, horizontally disposed shell;
• inlet means at the bottom of said shell for receiving moisture laden steam into said shell;
• outlet means at the top of said shell for discharging dried, heated steam from said shell;
• at least one tube bundle extending longitudinally through an upper portion of said shell and including a plurality of tubes, each said tube having a feed leg, a horizontally disposed U-bend and a return leg;
• drainage means extending longitudinally and centrally through a lower portion of said shell;
• a plurality of moisture separators extending in two banks longitudinally through said shell, said banks diverging from said drainage means upwardly to each side of said tube bundle;
• baffle means for dividing flow through said inlet means toward each bank of said separators;
• flow distribution means for directing the divided flow longitudinally through said shell, each flow distribution means including a plurality of plates perpendicular to the divided flow, said plates being staggered to separately direct portions of the divided flow at different levels along the banks of said separators,
• the lowermost of said tubes being of larger diameter and the uppermost of said tubes being of smaller diameter and the uppermost of said return legs having integrally formed, outwardly disposed fins, the lowermost of said return legs being smooth walled.