Combustion waste gas heat recovery system in reheating furnace

摘要

The present invention relates to a sensible heat recovery system of combustion flue gas generated in a continuous furnace for heating a material to a suitable temperature for rolling.;In the system using a heat exchanger to recover the sensible heat of the hot combustion flue gas in the furnace generated through the charging, preheating, heating and cracking zone to heat the material, the hot combustion vessel before passing through the heat exchanger Exhaust gas discharge ports for discharging gas; A distributed control system for adjusting the opening degree of the exhaust gas discharge port damper by comparing the temperature of the combustion exhaust gas with a temperature of a reference set value; A material preheater for preheating the material waiting to be charged therein by the combustion exhaust gas flowing from the exhaust gas discharge port; And a suction fan connected to the material preheater and an exhaust gas circulation line to discharge the low temperature combustion exhaust gas.;The combustion exhaust gas is selectively discharged through the exhaust gas discharge port according to the reference set point temperature, thereby reducing the operation cost of the dilution fan, and reducing the cost.The recovery efficiency of the combustion exhaust gas is achieved by preheating the atmospheric material before charging by using the combustion exhaust gas sensible heat. The effect is to maximize.;Furnace, exhaust gas outlet, material preheater, suction fan