FIELD: heat power engineering; ship boiler plants. SUBSTANCE: steam generating uptake and downtake tubes are arranged coaxially in gas duct and are connected to drum provided with flat upper and lower generating planes, lower generating plane being tube plate. Tubes are secured in tube plate by means of unions and are placed in communication with sludge collecting chambers from bottom. Vertical partitions installed in gas duct change cross section of gas duct. EFFECT: enhanced manufacturability and repair, increased heat exchange efficiency. 4 cl, 5 dwg
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