Desalting and deslagging device for supercritical water treatment of waste organic substances

Abstract

The invention relates to the field of supercritical water treatment of waste organic substances, and discloses a desalting and deslagging device for the supercritical water treatment of the waste organic substances. The device comprises a cylinder consisting of a straight cylindrical part (2) and an upper end part (4), a water outlet pipe (10) arranged on the lateral wall of the upper end part (4)of the cylinder, a spherical seal head (1) fixed at the lower end of the cylinder, a salt drainage pipe (11) arranged at the bottom of the spherical seal head (1), an end cover (5) fixed on the upperend part (4) of the cylinder, a heat exchange coil pipe (3) arranged in the cylinder, a center guiding pipe (8) arranged in the cylinder and fixed on the bottom surface of the end cover (5), and a water inlet pipe (9) passing through the end cover (5) and communicated with the center guiding pipe (8). The inlet and the outlet of the heat exchange coil pipe (3) extend out of the cylinder respectively and supercritical water is introduced into the heat exchange coil pipe; and the outlet of the center guiding pipe (8) extends out of the bottom of the heat exchange coil pipe (3).

Description

technical field [0001] The invention relates to the field of supercritical water treatment of waste organic matter, in particular to a desalination and slag removal device for supercritical water treatment of waste organic matter. Background technique [0002] Water in a supercritical state is equivalent to a non-polar solvent, which can be miscible with air, oxygen and organic matter in any proportion to form a homogeneous phase. At this time, the gas-liquid phase interface disappears, which eliminates the mass transfer resistance between the phases, and the reaction speed of the dissolved substances is no longer affected by the mass transfer. At the same time, high reaction temperature (about 400-650°C) also speeds up the reaction rate. [0003] Supercritical Water Oxidation (SCWO for short) is a waste organic treatment technology that has received high attention in recent years. It is unique in the treatment of organic pollutants, using the special properties of water i...

AI Technical Summary

Problems solved by technology

When supercritical water treats waste organic matter, when the temperature and pressure rise to the supercritical point of water (the critical temperature T of water c =374.15°C, critical pressure P c =22.05MPa), the inorganic salts originally dissolved in water will crystallize out, causing blockage of the reactor and corresponding pipelines

The blockage caused by the precipitation of inorganic salts will not only affect the heat transfer effect of the heat exchange equipment, but also make the process impossible in severe cases, and eventually lead to the failure of the process of supercritical water treatment of waste organic matter.

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