LIQUID HEATER Russian patent published in 1998 - IPC

FIELD: heating liquids with flue gases. SUBSTANCE: heater is provided with evaporator located in zone of initial contact with hot flue gases and with water supply and discharge systems. Initial (lower) turns of coil are located in heater at clearance relative to its walls. inner wall of evaporator is part of fire tube at whose inlet splitter is mounted, convex side of splitter is directed towards flow of flue gases, i.e. towards horizontal furnace whose walls are fully lined with refractory material. Invention gives equation for determination of furnace volume. EFFECT: improved recovery of flue gas heat; reduced deposition of salts on inner walls of tubes; enhanced durability of tubes. 1 dwg