
Schulz marine boiler has three water drums at the bottom;
connected to the steam drum by means of bended tubes that discharge below the
water level in the steam drum. The water drums are interconnected by means of
horizontal tubes behind the boiler. The tubes between the steam drum and the
center waterdrum function as
downcomers. The
outmost tube-rows and the center tube-row in each bank of tubes are partly
welded together to form
waterwalls. This
will delay the flue gas in the boiler and improve the efficiency.
The Schulz boiler was used in the German navy
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