Supercritical water system for nano-particle preparation coupled with organic waste liquid degradation

Abstract

The invention discloses a supercritical water system for nano-particle preparation coupled organic waste liquid degradation, which comprises a supercritical water reactor for nano-particle preparation coupled organic waste liquid degradation, and the reactor comprises a pressure-bearing outer shell consisting of an upper conical section, a middle straight tube section and a lower conical section which are coaxially arranged; the rotary stirring and crushing device is coaxially mounted at the bottom of the lower conical section; the air injection pipe and the slag discharge outlet are respectively mounted at the bottom of the lower conical section; the plurality of fuel horizontal injection pipes are mounted at the bottom of the middle straight cylinder section; the waste liquid injection pipe is mounted in the middle of the lower conical section; a top discharge port is formed in the top end of the upper conical section, and an annular inclined baffle is mounted in the upper conical section; the quench cooler is connected with a top discharge port of the reactor; and the hydraulic separator is connected with the quench cooler. According to the technical scheme, the materials are controlled to flow in the reactor in a suspended rotational flow mode, and meanwhile efficient degradation of organic waste liquid and high-quality preparation of nano-particles are achieved.

Description

technical field [0001] The invention relates to the technical field of supercritical water systems, in particular to a supercritical water system for nanoparticle preparation coupled with organic waste liquid degradation. Background technique [0002] Supercritical water (PC>22.1MPa, TC>374℃) is a special reaction medium. In the environment of supercritical water, organic matter and gas can be completely dissolved in each other, and the phase interface between gas and liquid phases disappears, forming a homogeneous system. , the reaction speed is greatly accelerated. More than 99.9% of the organic matter is rapidly burned and oxidized to CO within the residence time of less than 1 minute or even a few seconds 2 , H 2 O and other non-toxic and harmless end products. The reaction temperature is generally 400 ℃ ~ 650 ℃, avoiding SO 2 , NO x , dioxin and other secondary pollutants. [0003] However, some refractory organic waste liquids require higher reaction temper...

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Problems solved by technology

[0004] In view of this, it is necessary to address the above problems and provide a supercritical water system for the preparation of nanoparticles coupled with the degradation of organic waste liquid, which controls the internal pretreatment of organic waste liquid containing inorganic salts in the reactor through the swirling flame and the flame zone. Heat, improve preheating efficiency, avoid coking, salt deposition, low heat transfer efficiency, blockage and other problems caused by direct preheating of organic waste liquid; control the suspension and swirl flow of materials in the reactor, and realize efficient degradation of organic waste liquid at the same time and the preparation of nanoparticles; the quality of the prepared nanoparticles can be further improved by particle separation, circulation and crushing after the reaction

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