NON-FERROUS REFINING WASTE HEAT RECOVERY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a system for increasing the amount of electric power generation without lowering the capacity of an electrical dust precipitator and by lowering the temperature of a converter exhaust gas and a flash smelting furnace exhaust gas to improve dedusting capacity in the electrical dust precipitator, and by stably increasing the quantity of steam contributing to generation. SOLUTION: In the waste heat recovery system of non-ferrous refining, the heat of an exhaust gas generated from the flashmelting furnace and a converter is removed by a flashmelting furnace waste heat boiler and a converter waste heat boiler. Power is generated by steam recovered by recovered heat. Water recovered from the steam is circulated as water supply for steam in the flashmelting furnace waste heat boiler and the converter waste heat boiler. The exhaust gas passing through the converter waste heat boiler is led to the electrical dust precipitator for purification. The system has a boiler feed water tube in a converter exhaust gas flue, and cools the exhaust gas passing through the converter waste heat boiler and preheats the water supply for steam circulated through the boiler feed water tube. COPYRIGHT: (C)2004,JPO