Corrosion-resistant anti-clogging organic pollutant supercritical water oxidation system

Abstract

The invention discloses a corrosion-resistant anti-clogging organic pollutant supercritical water oxidation system which comprises a raw material preheating and feeding device, an oxidation degradation device and a material discharging and cooling device. The oxidation degradation device comprises a gas-solid separator communicated with an oxidation reactor. The system separates water insoluble solids and inorganic salt which are carried by pollutants and generated a degradation process during an oxidation degradation process by virtue of the characteristic of extremely low solubility of the inorganic salt in supercritical water, thereby avoiding heat / mass transfer efficiency reduction as well as pipeline clogging which are caused by the deposition and attachment of the water insoluble solids and the inorganic salt on the inner wall of the system; meanwhile, saline solution caused by alkaline liquid introduction and corrosion reduction can also be prevented, and thus the corrosion-resistant anti-clogging organic pollutant supercritical water oxidation system is more environment-friendly compared with the conventional equipment; and additionally, the system is provided with the equipment with high anti-corrosion capability, uses less process water, is low in energy consumption, can run in an industrialization scale easily, and can be widely applied to bio-safety disposal and resource utilization of organic waste water / liquid, urban sludge and volatile poisonous substances.

Description

technical field [0001] The present invention relates to the field of environmental protection and chemical technology, and in particular to the use of supercritical water as a reaction medium for the harmless treatment and resource utilization of high-concentration, biochemically degradable organic wastewater and refractory toxic solid waste and other pollutants A supercritical water oxidation system. Background technique [0002] Water whose temperature and pressure are higher than its critical point temperature and pressure (T=374.2° C., P=22.1 MPa) is called supercritical water (SCW). In the supercritical state, the density, viscosity, dielectric constant, and ion product of water decrease, the hydrogen bond weakens, and the diffusion performance and non-polar characteristics are enhanced. Supercritical Water Oxidation (SCWO for short) is a new environmental treatment method that uses supercritical water as a reaction medium to quickly, completely and thoroughly oxidize ...

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Problems solved by technology

[0007] In view of this, the present invention provides a corrosion-resistant and anti-clogging organic pollutant supercritical water oxidation system, which effectively solves the problem of solids carried by organic pollutants in existing oxidation degradation equipment and their Inorganic salts produced during the oxidative degradation process of supercritical water are easy to deposit, causing technical problems in equipment heat transfer, mass efficiency reduction and pipeline blockage

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