BOILER Russian patent published in 2002 - IPC

FIELD: generation of steam, boiler manufacture. SUBSTANCE: given boiler includes barrel installed on membrane tube body comprising radiation gas conduit formed by front, side, dividing screens, festoon in upper part, and convective gas conduit formed by dividing, side and rear screens where heated surfaces are arranged. Rear screen is fitted in lower part by chambers and U-shape bent towards dividing screen with formation of space beneath which additional upper and lower chambers are located. One heating surface is situated in space and slits for passage of gases are formed between horizontal section of tube in space. Chamber of rear screen and additional chambers communicate with row of vertical tubes and aperture between additional chambers is closed by flat coil screen surface attached over outline to additional chambers and by two extreme additional vertical tubes attached to side screens of convective gas conduit. EFFECT: diminished overall dimensions, reduced labor input to repair of heated surfaces. 2 cl, 11 dwg