Supercritical water oxidation process and catalytic wet oxidation process combined reactor

Abstract

The invention discloses a supercritical water oxidation process and catalytic wet oxidation process combined reactor. A main reaction tube is vertically arranged in a casing and is fixed by a cover plate flange at an opening of the casing; an upper opening is closed; a frame type sieve plate is circularly arranged between the casing and the main reaction tube inside the casing and is fixed; a catalyst is stored in the frame type sieve plate; a wastewater inlet and an oxygen inlet are formed in the upper part of the main reaction tube; a clear water outlet and a clear water inlet which are respectively formed in the upper side and the lower side of the frame type sieve plate are formed in the wall surface of the casing; the clear water outlet is sequentially connected into a heat exchanger and a circulating pump towards a direction of the clear water inlet; a saline water outlet is formed in the bottom of the casing. According to the reactor disclosed by the invention, a supercritical water oxidation process and a catalytic wet oxidation process are respectively used or are simultaneously and jointly used; supercritical oxidation is performed in the main reaction tube; catalytic wet oxidation is performed outside the main reaction tube; the reactor has relatively-high operation elasticity, provides optimization selection possibility for wastewater treatment with different fields, different concentrations and different treatment requirements and has the advantages of good structural strength, low manufacturing cost and convenience in arrangement; the problem of scale blockage of a supercritical water oxidation reactor due to high-temperature corrosion and salting out is effectively solved.

Description

technical field [0001] The invention relates to the fields of environmental protection and chemical industry, in particular to a reactor for treating waste water containing organic matter through a supercritical water oxidation method and a catalytic wet oxidation method. Background technique [0002] Supercritical Water Oxidation (SCWO for short) refers to using supercritical water as the reaction medium under the reaction conditions where the temperature and pressure are higher than the critical temperature (374.3°C) and pressure (22.1MPa) of water, Use air or oxygen as the oxidant to completely oxidize organic matter in water to CO 2 and H 2 The process of O et al. [0003] SCWO utilizes the unique properties of supercritical water to convert organic matter into environmentally friendly products. Its advantages are shown in the following aspects: ① High removal rate. Under supercritical conditions, organic matter is oxidized into harmless substances such as carbon diox...

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Problems solved by technology

[0006] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a reactor in which the supercritical water oxidation method and the catalytic wet oxidation method are used separately or simultaneously on the same equipment, and at the same time, the problems of corrosion and blockage of the equipment can be slowed down

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