A method for optimally adjusting water film thickness in supercritical water oxidation evaporation wall reactor

Abstract

The invention discloses a method for optimally regulating the thickness of a water film of a supercritical water oxidation and evaporation wall type reactor. The method is based on a system for adjusting the coverage rate of the water film of the supercritical water oxidation and evaporation wall type reactor. The system comprises an outer pressure bearing wall. A barrel-shaped porous evaporationwall is arranged in the outer pressure bearing wall. An outlet of an evaporation wall water pump is connected with a water inlet of the porous evaporation wall through a pipeline. Outlets of a gas booster pump and a material pump are connected with an inlet of the supercritical water oxidation and evaporation wall type reactor through pipelines. The porous evaporation wall is of a conical structure. The thickness of the porous evaporation wall is gradually increased from top to bottom. The section of the porous evaporation wall is a right trapezoid. The method includes the steps that the thickness of the water film is adjusted by adjusting the evaporation intensity, the concentration of organic raw materials, the preheating temperature of the organic raw materials, the evaporation water inlet temperature and branch evaporation wall water flow proportions. The method can be applied to optimally adjusting performance parameters of the water film of the supercritical water oxidation and evaporation wall type reactor.

Description

technical field [0001] The invention relates to the technical field of supercritical water oxidation evaporation wall reactors, in particular to a method for optimally adjusting the water film thickness of supercritical water oxidation evaporation wall reactors. Background technique [0002] Supercritical water oxidation technology is a very valuable organic pollutant treatment technology. It uses supercritical water to dissolve organic substances and oxidants, so that organic substances can undergo a homogeneous reaction in an oxygen-enriched environment, thereby quickly and thoroughly Convert organic matter into harmless substances such as carbon dioxide and water, as well as inorganic salts. [0003] The application of supercritical water oxidation technology to highly toxic, high-concentration, and biodegradable organic waste has the following advantages: fast reaction speed, high treatment efficiency, no formation of secondary pollutants, no need for high-energy drying ...

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Problems solved by technology

[0007] The upper part of the supercritical water oxidation evaporation wall reactor is the main area of ​​the oxidation reaction, and the upper part is a supercritical environment of high temperature and high pressure; the high temperature and high pressure conditions in the upper supercritical region and the existence of violent chemical reactions make the convection between the main fluid and the water film Diffusion and mixing are extremely strong, which destroys the formation of water film; in addition, when the coupling relationship between the selected operating parameters is not appropriate, the thickness of the entire reactor will be reduced and the water film will be discontinuous

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