| 摘要 |
PURPOSE: To obtain a high denitration capacity not only at higher temperatures but also at low temperatures by changing a proper reaction temperature in accordance with the temperature change in the reaction space in a non catalytic denitration apparatus by a method in which the temperature of a non-catalytic denitration reaction space into which a reducing agent such as ammonia and hydrogen peroxide are added is detected, and the amount of hydrogen peroxide is adjusted on the basis of a specified temperature range. CONSTITUTION: When the detected value of a space temperature detector 14 is higher than 900 deg.C, the supply of hydrogen peroxide is stopped by a signal from a flow rate controller 6 for hydrogen peroxide and water. When the value is below 700 deg.C, the supply of urea and hydrogen peroxide is stopped by a signal from a central control board 9 to cease the denitration. In a range of 700-900 deg.C, hydrogen peroxide is added. The temperature of a post combustion chamber 15 in which non-catalytic denitration takes place mainly is detected by a temperature detector 14, the signal of the detected temperature is sent to the flow rate controller 6, and a hydrogen peroxide aqueous solution flow rate adjuster 21 is operated by a function of preset temperature and the amount of supplied hydrogen peroxide so that a prescribed amount of a hydrogen peroxide aqueous solution is added into an urea aqueous solution. |
