Zoning method of supercritical water treatment reactor of waste organism

Abstract

The invention belongs to the field of treatment of waste organism, relates to a reactor using supercritical water oxidation or evaporating method to realize innoxious treatment of organic wastewater and refuse and discloses a zoning method of a supercritical water treatment reactor of waste organism; the reactor comprises a pressure-bearing chamber (2) composed of a top part, a straight cylinder part and a conical bottom part, an inner chamber (1) which is arranged in the pressure-bearing chamber (2) and composed of evaporation walls; the inner chamber (1) also comprises the top part, the straight cylinder part and the conical bottom part, and shares the same shape with the pressure-bearing chamber (2), size thereof is smaller than the size of the pressure-bearing chamber (2); gaps are reserved between the inner chamber (1) and the pressure-bearing chamber (2) as evaporation wall water area( filled with clean evaporated wall water); the place where the inside of the inner chamber (1) clings to the wall is an evaporation wall water film area; the area outside the top part of the inner chamber (1) and the evaporation wall water film area of the straight cylinder part is called the reaction area, and the area outside the evaporation wall water film area of the conical bottom part is called the dissolving salt area.

Description

Technical field [0001] The invention belongs to the field of waste organic matter treatment, and relates to a reactor that uses supercritical water oxidation or gasification to realize the harmless treatment of organic waste water and waste, and in particular relates to a partitioning method of a supercritical water treatment reactor for waste organic matter. Background technique [0002] Supercritical water (SCW for short) refers to water in a special state whose temperature and pressure are higher than its critical point (T=374.15°C, P=22.12MPa). Supercritical water has the properties of both liquid and gaseous water. In this state, only a small amount of hydrogen bonds exist, the dielectric constant is similar to that of non-polar organic solvents, and it has a high diffusion coefficient and low viscosity. At a sufficiently high pressure, SCW can be miscible with air, oxygen and organics in any ratio to form a homogeneous phase. At this time, the gas-liquid interface disappear...

AI Technical Summary

Problems solved by technology

Because the supercritical water treatment reactor of waste organic matter is under high temperature and high pressure conditions, especially the waste organic matter contains halogen, sulfur or phosphorus, which will produce acid after decomposing in supercritical water, causing strong corrosion of equipment; even with better corrosion resistance Ni-based materials with high corrosion resistance still suffer from severe corrosion in supercritical water, especially in subcritical water

[0008] (2) Salt deposition problem

Most salts have very low solubility in low-density supercritical water (typically 1-100mg / L)

When the subcritical solution is rapidly heated to the supercritical temperature, because the solubility of the salt is greatly reduced, a large amount of precipitation will be precipitated, and the deposited salt will cause the blockage of the reactor, which not only affects the normal operation of the reactor, but also brings potential danger

[0009] (3) Temperature control problem

For wastes with high organic content, excessive heat release in the SCWO process can easily lead to uncontrollable reactor temperature, resulting in deterioration of reaction conditions and reduction of reactor wall stress.

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