A tubular supercritical water oxidation reactor, supercritical water oxidation system and method

Abstract

The invention provides a pipe type supercritical water oxidization reactor and a supercritical water oxidization system and method. The pipe type supercritical water oxidization reactor comprises an inner barrel and an outer barrel; the outer barrel sleeves the outer part of the inner barrel; a material inlet is arranged between the inner barrel and the outer barrel; a material outlet is formed inthe top of the inner barrel and a working medium flows in from the gap between the inner barrel and the outer barrel and flows out from the top of the inner barrel; and a fin or an expansion joint isadditionally arranged in the gap between the inner barrel and the outer barrel, so that the turbulent flow is increased, a flow path is lengthened and the heat exchange is reinforced.

Description

technical field [0001] The disclosure belongs to the field of tubular supercritical water oxidation reactors, and in particular relates to a tubular supercritical water oxidation reactor, a supercritical water oxidation system and a method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Water treatment systems in nuclear power plants use organic ion exchange resins (IER) to adsorb various types of ions, minimize corrosion and degradation of system components, and remove radioactive contaminants. Organic resins are also used in chemical decontamination or cleaning processes, regeneration of process water through reagents and removal of radionuclides. Therefore, nuclear power plants will generate a large amount of contaminated organic ion exchange resins. However, due to the radioactivity of waste resin, it is generally processed by stor...

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Problems solved by technology

However, because the resin particles are in the solid phase, the reaction is a heterogeneous reaction, and the required reaction time is long. There is a contradiction between the solid phase reaction time and the fluid flow time, and the current reactors generally cannot meet the requirements.

Furthermore, current technology cannot achieve complete oxidation of solid particles without crushing them

If the resin is broken into small particles and then reacted, the system will be complicated and cause secondary pollution

Secondly, due to the laminar flow in the supercritical water reactor, the heat conduction effect is poor, so there is no suitable means to evenly heat the feed to meet the two conditions that the resin can quickly heat up and start to react, and the pipeline temperature will not be too high

In addition to the unsatisfactory reaction time and uniform heating, the current reactor also has the disadvantage of easy formation of salt precipitation

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