Corrosion-resisting clogging-proof overcritical water oxidization reactor

Abstract

This invention relates to a corrosion-resistance and blocking-resistance supercritical water oxidation reactor. It is composed of: a casing, a water inlet, a jacketed supporting ring and a spring ring, an annular water entrance and a water dash plate, inner cylinder of the reactor, raw material feeder, nozzle, an outlet of reactant and multi-point optical fiber online thermo-detector. In said reactor, there are a process water jacket area, supercritical water oxidation area, a sub-critical water area for dissolving inorganic salts on the bottom of the inner cylinder of the reactor. The process water jacket area is divided into two or more than two layer area by the supporting ring and the spring ring. The water, after removing oxygen and removing salts, passes through porous-wall structure enters the reaction area and forming a protective water membrance over the inner wall of the reactor. The temperature sensor and optical fiber are placed in a sleeve which is placed near the central line of the reactor. Advantages are: easy to be maintained, safety operation.

Description

technical field [0001] The invention belongs to the fields of environmental protection and chemical industry, and in particular relates to a corrosion-resistant and anti-clogging supercritical water oxidation reactor. Background technique [0002] Supercritical Water Oxidation (SCWO) technology uses supercritical water as the medium to oxidize organic matter. When the water reaches the critical point, that is, the temperature is 374°C and the pressure is above 22.05MPa, it will reach the supercritical state. The water in the supercritical state has different physical and chemical properties from the normal water. Supercritical water has a liquid-like density, solvency and good fluidity, as well as a gas-like diffusion coefficient and low viscosity. In supercritical water, the gas-liquid two-phase interface disappears, forming a homogeneous phase system, and the reaction speed is greatly accelerated. Organic matter and oxygen and other gases are completely miscible in super...

AI Technical Summary

Problems solved by technology

Due to the low solubility of inorganic substances under supercritical conditions, the precipitation of salt during the oxidation process will cause blockage of reactors or pipelines, resulting in a sharp drop in heat transfer efficiency and even accidents.

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