Supercritical water treatment reactor for organic wastes

Abstract

The invention discloses a supercritical water treatment reactor for organic wastes, which comprises a pressure bearing wall connected on a pedestal, an erosion resistance wall is arranged in the pressure bearing wall, and an interlayer used for filling cooling water is formed between the pressure bearing wall and the erosion resistance wall; an insulated heat conducting wall with electric heatingwires is arranged in the erosion resistance wall, and an annular catalyst box is arranged in an annular cavity formed between the erosion resistance wall and the insulated heat conducting wall; a hydrocyclone is arranged in the insulated heat conducting wall, the bottom part of the hydrocyclone is passed through the centre of a reactor pedestal to form a strong brine outlet, and the top part thereof is passed through the upper end face of the insulated heat conducting wall to form an overflow opening; a fluid inlet is arranged on the pedestal, and a hydrocyclone inlet is arranged in the radial tangent direction on the upper part of the hydrocyclone; a fluid outlet is arranged on the pedestal situated between the insulated heat conducting wall and the erosion resistance wall; a cooling water inlet is arranged on the reactor pedestal situated between the pressure bearing wall and the erosion resistance wall; and a cooling water outlet is arranged on the top part of the pressure bearing wall of the reactor.

Description

Technical field [0001] The invention relates to a supercritical water treatment device for waste organic matter, in particular to a reaction device for supercritical water treatment of waste organic matter. Background technique [0002] Supercritical water refers to water in a special state where the temperature and pressure are higher than its critical point (T=374.15°C, P=22.12MPa). Compared with liquid water, there are only a small amount of hydrogen bonds in this state, and the dielectric constant is similar to that of polar organic solvents, with high diffusion coefficient and low viscosity, and good transfer performance. Under sufficiently high pressure, supercritical water can dissolve with organic matter and oxygen in any ratio, so that the heterogeneous reaction becomes a homogeneous reaction, which greatly reduces the resistance of mass transfer and heat transfer. Inorganic substances, especially salts, have extremely low solubility in supercritical water (usually less...

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Problems solved by technology

[0006] Aiming at the defects or deficiencies of existing supercritical water treatment reactors in anti-corrosion, anti-clogging caused by salt deposition, and reducing catalyst deactivation rate, the purpose of the present invention is to provide a reaction for supercritical water treatment of waste organic matter The reactor, by separating the pressure-bearing wall and the corrosion-resistant wall, effectively reduces the corrosion rate of the reactor; the reaction fluid in the reactor uses centrifugal separation to remove the precipitated inorganic salts, effectively overcoming the problem of reactor blockage caused by salt precipitation; Desalination treatment is carried out before the catalytic reaction, which effectively reduces the deactivation rate of the catalyst, and the reactor structure is convenient for the replacement of the solid catalyst and its carrier

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