BOILER HEATING SURFACE Russian patent published in 1995 - IPC

FIELD: power engineering. SUBSTANCE: boiler heating surface has furnace and gas flue, waterwall 4, vertical-tube side waterwalls, and rear waterwall 7. Waterwall 7 has sections bent out from its plane to form pocket 8 accommodating heat-transfer bank 11 mounted on vertical plates 10 and 9. Plate 9 is placed in plane of vertical portions of tubes of waterwall 7. Heating surface is provided with temperature displacement limiters and stops engageable with them and placed above and below bank. Stops are fixed on plate 9 and limiters, on tubes of bank 11. Heating surface has supports for plate 9 installed for displacement relative to waterwall 7. Surface on side of waterwall 7 has vertical girders arranged on side waterwalls; girders are secured on stiffness bands near pocket 8, above and below the latter and on side waterwalls for longitudinal and transverse displacement relative to side waterwalls. EFFECT: improved design. 3 cl, 5 dwg