| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas purification apparatus which is small and highly reliable, while maintaining purification efficiency of exhaust gas.SOLUTION: An oxidation catalyst 106, a diffusion plate 107, a DPF 108 and an SCR catalyst 109 are provided in this order from the upstream in an exhaust passage 105 formed inside the exhaust gas purification apparatus 101. A urea water pipe 110 is provided which passes through a part of the exhaust passage 105, then penetrates through the oxidation catalyst 106, and is opened at an end surface 106a on the downstream side thereof. Urea water supplied from a urea water supply nozzle 111 and flowing in a urea water passage 112 formed in the urea water pipe 110, is hydrolyzed into ammonia and carbon dioxide by heat of the exhaust gas and heat of reaction of the oxidation catalyst 106, which are added in the exhaust gas from the end surface 106a on the downstream side of the oxidation catalyst 106. |
