BOILER Russian patent published in 1997 - IPC

FIELD: power engineering; steam and hot-water boilers. SUBSTANCE: boiler has gas duct 1 with heating surfaces made from coils 2 mounted inside, lateral chambers where bent sections of coils 2 are located and vertical partitions separating the lateral chambers from gas ducts 1. Gas duct 1 has two passes (by gas) formed by horizontal partition 5, inlet chamber 6, outlet chamber 7 and swivel chamber. On one side of boiler, ends of coils 2 are brought out of boundaries of lateral chamber and are connected to header 9 with inlet volume 10 and outlet volume 11 formed by partition 12 and to swivel header 13. Volumes 10 and 11 of header 9 are provided respectively with inlet branch pipe 14 and outlet branch pipe 15 for supplying and discharging the heat-transfer agent. Vertical partitions are made from rectangular distance plates 16 with recesses in form of semicircles on either side for tubes of coils 2; they are mounted one on another in one plane and their ends are secured on wall of gas duct 1 by means of fastening unit 1. Outer walls of lateral chambers 3 are detachable. EFFECT: enhanced reliability. 2 cl, 4 dwg