| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the discharge of nitrogen oxides remarkably inspite of simplifying constitution and operation. SOLUTION: The value of NOX in exhaust gas is restrained so as to be not higher than a limited value by a method wherein a flow rate control orifice 12A is interposed in an air suction duct 2 to adjust the inlet pressure of a forced ventilating fan 11 so as to be -30mmAq upon MCR and an exhaust gas recirculating duct 13, branched from the outlet port of exhaust gas of an oil burning type absorption refrigerating device, is connected to the downstream of the flow rate control orifice 12A of the air suction duct, then, the opening degree of a draft control damper 31 is adjusted properly to control the internal pressure of the exhaust gas duct 3 so as to be-5mmAq.</p> |
