| 摘要 |
<p>PROBLEM TO BE SOLVED: To stabilize treatment with the method by providing a reaction region of a tubular reactor with plural separate introduction points in the fluid flow direction, mixing and introducing the organic matter to be decomposed, supercritical water and oxidizing agent into the reactor at a first introduction point and further introducing the organic matter to be decomposed into the reactor at the following induction points, in the method for decomposing organic matter with an oxidizing agent in the presence of supercritical water. SOLUTION: In this method and the device for the method, a tubular reactor 1 is provided with three separate introduction points for introducing organic matter to be decomposed, i.e., first, second and third introduction points. At the first induction point positioned at the reactor end 2 on the upstream side of the reactor 1, supercritical water, an oxidizing agent and organic matter are mixed and introduced into the reactor 1 with a two-flow nozzle (e.g. one flow consists of a mixture of the supercritical water and oxidizing agent and the other consists of the organic matter). At the second introduction point 3 which is positioned downstream from the first injection point and at which decomposition of the organic matter introduced into the reactor 1 at the first introduction point is considered to be completed, the organic matter is introduced into the reactor 1. Similarly, at the third point 4 positioned downstream from the second introduction point 3, the organic matter is introduced into the reactor 1. The oxidative decomposition product is discharged from the reactor end 6 on the downstream side of the reactor 1 to a pipeline 7 of a discharge system. Thus, the introduction amount of supercritical water is remarkably reduced and deficient decomposition of the organic matter due to uneven distribution of the organic matter in the reactor 1, etc., can be prevented.</p> |
