HOT-WATER BOILER Russian patent published in 1998 - IPC

FIELD: hot-water boilers. SUBSTANCE: hot-water boiler includes furnace and convective sections made from tubes; convective section is made in form of stacks of tubes 5 with lower dispensing headers 6 and upper collecting headers 7; headers 6 are connected to common supply header 8 and collecting headers 7 are connected to common discharge header 4. Blanks 9 fitted in lower dispensing headers 6 and upper collecting headers 7 are used for change of direction of water in tubes 5 of stacks. Separating partitions 10 made from heat-resistant material are mounted at point where blanks 9 are fitted; these partitions are used for change of direction of flow of flue gases from furnace section. Part of upper collecting headers 7 is located above furnace section and is used as shield connected with common header 4 for directing water to side and bent walls of furnace section. EFFECT: preliminary heating of water at reduced discharge of sludge and considerable reduction of fuel consumption. 2 dwg