Baffling tank type supercritical water treatment reactor with sacrificial lining

Abstract

The invention discloses a baffling tank type supercritical water treatment reactor with a sacrificial lining, comprising a barrel and a catalyst box arranged in the barrel, wherein the upper part of the barrel is connected with a top cover, the lower part of the barrel is connected with a spherical seal head, and the inner side of the barrel, the inner side of the spherical seal head and the inner side of the top cover form the inner wall of a reactor. The baffling tank type supercritical water treatment reactor is characterized in that the inner wall of the reactor is provided with a high-temperature resistant and heat insulating coating layer, the inner wall of the high-temperature resistant and heat insulating coating layer is provided with a sealing coating layer, and the inner wall of the seal coating layer is provided with the sacrificial lining. The combinational use of the two kinds of coating layers on the inner wall of the reactor reduces the temperature of the wall of the reactor and simultaneously prevents the corrosion on the wall of the reactor. The baffling tank type structure of the reactor is beneficial to the effective prevention of reactor blockage caused by salt deposition, and moreover, the catalyst box is convenient to disassemble so that catalysts are simple to load and replace. The invention can be widely applied to a harmless treatment and recycling process for high-concentration organic waste water which is difficult to biochemically degraded.

Description

[0001] Field [0002] The invention belongs to an environmental protection water treatment device, in particular to a reactor which uses supercritical water as a reaction medium to carry out harmless treatment of refractory biochemically degradable organic waste water. Background technique [0003] Supercritical Water (SCW for short) refers to water in a special state whose temperature and pressure are both higher than its critical point (T=374.15°C, P=22.12MPa). In this state, only a small amount of hydrogen bonds exist, the dielectric constant is close to that of organic solvents, and it has a high diffusion coefficient and low viscosity. Organic matter and oxygen can be miscible with SCW in any proportion, so that the heterogeneous reaction becomes a homogeneous reaction, which greatly reduces the resistance of mass transfer and heat transfer. The solubility of inorganic substances, especially salts, in SCW is extremely low, and it is easy to separate them. [0004] Super...

AI Technical Summary

Problems solved by technology

Corrosion of materials will lead to a decrease in the service life of the reactor and cause safety accidents

[0009] 3) In the supercritical water oxidation treatment, the oxidation of ammonia nitrogen is more difficult

At present, it is difficult to load and replace the catalyst in the closed reaction system, and there are problems such as loss and deactivation of the catalyst.

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