LAMP FIELD FOR TREBLE-PASS SINGLE-FLUE BOILER'S TUBES

摘要

As part of the retention of needed bridges and spans required due to the technological-manufacturing and operational views, it is possible to situate a larger number of cross-sectional circles in the same area of the front reversible headers. Heat surface shall be increased, or with the same area, the diameter of the boiler shell shall be reduced by 10 to 15%. The cross-sectional areas (43) of the inner fire tubes (41) as well as of the external fire tubes (42) are laid out on the concentric circles in such a way so that on each circle there is the same number of regularly situated cross-sectional areas (43) and the midpoint of each cross-sectional area (43) and midpoints of the closest cross-sectional areas (43) form an isosceles triangle on the neighbouring concentric circle. The sides of all triangles are of the same lengths and the concentric circles belonging to the inner fire tubes (41) have their midpoint within the axis (21) of the flame (2), and the concentric circles belonging to the external fire tubes (42) have their midpoint within the axis (31) of the rear reversible header (3).<IMAGE>