| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive and simple NOx purifying device capable of effectively purifying NOx in an internal combustion engine of a diesel engine, a lean-burn gasoline engine or the like which discharges oxygen-excessive exhaust gas. <P>SOLUTION: The nitrogen oxide purifying device 1 is equipped with an aroma content removing means 40 for removing an aroma content from a light oil to be utilized as a reducing agent. The aroma content removing means 40 consists of a removed solvent tank 42 for storing an aroma content removed solvent, an aroma content separator 44 for separating a reducing agent and an aroma content by mixing the light oil A with the aroma content removed solvent B to settle the aroma content and a recovering means 46 for separating and recovering the aroma content and the removed solvent. The recovering means 46 contains a recovery tank 46 for storing a mixture D of the aroma content a and the removed solvent B separated by the aroma content separator 44, a heater 46h for distilling the aroma content a from the mixture D and a return pump 48 for circulating to the removed solvent tank 42 the removed solvent B after distillation. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
