Supercritical hydrothermal combustion device with residue self-separation function and method

Abstract

The invention provides a supercritical hydrothermal combustion device with a residue self-separation function. A hydrothermal flame generator is arranged in the center of the upper portion of a devicemain body, a high-temperature stable combustion body is arranged on the side face of the device main body, the outer side wall of the high-temperature stable combustion body is a double spiral structure, the double spiral structure is matched with the inner wall of the device main body to form a feeding double spiral channel, a high-pressure auxiliary conveying channel and a feeding inner channelwhich are connected with an inlet of the feeding double spiral channel are formed in the upper part of the device main body, a cyclone generating device is arranged on the inner side wall of the high-temperature stable combustion body, a burning slag slurry converging cone is arranged at the lower part of the device main body, a supercritical hot fluid guiding cone is arranged at the lower part of the burning slag slurry converging cone, a burning slag slurry outlet is formed in the upper part of the side surface of the converging cone, and a supercritical hot fluid outlet is formed in the bottom of the guiding cone. The invention also provides a corresponding combustion method. The rapid ignition and efficient cleaning and combustion of solid phase or solid fuel and the effective separation of burnout slag stream are realized.

Description

technical field [0001] The invention belongs to the technical field of advanced combustion, energy saving and environmental protection, and in particular relates to a supercritical hydrothermal combustion device and method with the function of self-separation of residues. Background technique [0002] Supercritical water refers to water in a special state whose temperature and pressure are higher than its critical point (Tc=374.15°C, Pc=22.12MPa). Supercritical water oxidation technology uses the special properties of supercritical water, such as low viscosity, low dielectric constant, and high diffusivity, to make the organic matter completely dissolved in it react with the oxidant in a rapid and thorough homogeneous phase, and the carbon element in the organic matter is transformed into Carbon dioxide is converted into carbon dioxide, elements such as chlorine, sulfur, and phosphorus are converted into corresponding inorganic salts, and most nitrogen elements are converted...

AI Technical Summary

Problems solved by technology

[0003] At present, salt deposition and corrosion problems restrict the low-cost and reliable industrial implementation of supercritical water oxidation technology to a certain extent. Among them, the high-pressure 300-410°C high-temperature area is the material corrosion-sensitive area and the rapid precipitation area of ​​inorganic salts in the supercritical water oxidation process system. , the equipment serving in this working area is facing a relatively severe risk of corrosion and blockage caused by salt deposition

However, the hydrothermal combustion of solid fuels such as coal and sludge will still generate solid phase combustion slag. If not handled properly, it will block subsequent devices and affect the normal operation of the whole.

Images