Spiral-flow type supercritical hydrothermal combustion device and method

Abstract

The invention discloses a spiral-flow type supercritical hydrothermal combustion device and method. The device comprises a plurality of hydrothermal flame generators which are uniformly distributed atthe upper part of a device main body in the circumferential direction, and each hydrothermal flame generator is provided with a high-pressure organic slurry input branch pipe and a high-pressure oxidant input branch pipe; the geometric axis of an output port of each hydrothermal flame generator is externally tangent to an imaginary circle of a core combustion area in the device, a burnout slag slurry gathering cone is arranged on the lower part of the device main body and connected with a supercritical thermal fluid guide cone on the lower part of the burnout slag slurry gathering cone, a plurality of burnout slag slurry outlets D are formed in the upper part of the side face of the burnout slag slurry gathering cone, and a supercritical thermal fluid outlet C is formed in the bottom of the supercritical thermal fluid guide cone. According to the invention, rapid ignition, efficient clean combustion and effective separation of slag flow after burnout of solid-phase or solid-containingfuels such as fossil fuels (such as coal) and urban / industrial sludge are realized, and the method is an advanced combustion technology for promoting efficient and pollution-free conversion of chemical energy into heat energy.

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 swirling supercritical hydrothermal combustion device and method. 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 into nitrogen gas to achieve efficient ...

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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.

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