Patent ID: 6841138
Filing Date: 2005-01-11
Classification: B01D,F23G,F23J,Y02E

Abstract:
1. A device for reducing the temperature of exhaust gas comprising: a gas cooling chamber equipped with a gas inlet, a gas outlet and an ash outlet; a thermal water tank for storing pressurized water with a temperature higher than a boiling point of water under atmospheric pressure; an alkaline solution tank for storing alkaline solution; a mixer connected to mix water from the thermal water tank and alkaline solution from the alkaline solution tank; a temperature reduction water nozzle for spraying thermal water containing alkaline solution from the mixer into the gas cooling chamber; a temperature reduction water volume control valve arranged to adjust the flow volume of water containing alkaline solution supplied to the temperature reduction water nozzle, an alkaline solution volume control valve arranged to adjust the flow volume of alkaline solution supplied to the mixer; a temperature detector arranged to detect the temperature of low temperature exhaust gas flowing from the gas outlet; an acid gas concentration detector arranged to detect the acid concentration of the low temperature exhaust gas; a temperature control device with an opening and closing mechanism arranged to control the temperature reduction water volume control valve in response to signals from the temperature detector; and an acid gas concentration control device with an opening and closing mechanism arranged to control the alkaline solution volume control valve in response to signals from the acid gas concentration detector.