A supercritical water oxidation reaction device

Abstract

The invention discloses a vertical supercritical water oxidation reaction device, which comprises an injector, a vertical reaction kettle, an isolation sleeve with isolation and cooling functions, and an external heating device. The vertical reactor makes full use of gravity to settle the generated inorganic salts and scales to the salt discharge port at the bottom of the reactor, reducing the risk of the reactor being blocked. The feeding mode of injector atomization and pre-mixing can effectively shorten the time required for waste liquid reaction preparation, avoid the phenomenon that the waste liquid is accumulated in the reaction device due to poor heat absorption, and reduce the demand for the reaction device. critical temperature. The layout structure of the discharge port and the feed port on the top is adopted, and the isolation sleeve is used to effectively extend the flow path of the reactant, increase the residence time of the reactant, and reduce the interference caused by the discharge. The dual-channel discharge valve performs continuous discharge with a small flow rate and intermittent discharge with a large flow rate, which improves the service life of the discharge valve, reduces the frequency of pressure fluctuations in the reactor, and increases the overall residence time of the reactants in the reactor.

Description

technical field [0001] The invention is used for the treatment of conventional organic waste liquid or nuclear-related organic waste liquid, belonging to the technical field of environmental protection equipment, in particular to a device structure for supercritical water oxidation reaction. Background technique [0002] With the development and improvement of the national industrial system and the improvement of environmental protection requirements, the existing waste liquid treatment methods such as incineration, extraction and adsorption have been difficult to meet the discharge requirements. [0003] Since supercritical water (temperature ≥ 373.99°C, pressure ≥ 22.064MPa) has the ability to dissolve non-polar organic compounds, it is completely miscible with organic matter, oxygen, air, etc. under high enough temperature and pressure, so these organic compounds can be Homogeneous oxidation in supercritical water, not limited by interphase transfer. Super-water oxidatio...

AI Technical Summary

Problems solved by technology

[0004] In the existing supercritical water oxidation reaction device, limited by the structure of the reactor, the heating device and the cooling device are located outside the reactor shell. On the premise of taking into account the strength of the reactor shell material, the reactor is cooled and heated. The efficiency is extremely low, which is not conducive to rapid control of the reactor temperature, but also increases the cost of waste liquid treatment

When the waste liquid is fed into the reactor, a separate independent pipeline is used to feed the material directly, which is not conducive to the atomization and mixing of the reactants, and prolongs the reaction preparation time; The ability to interfere with material pressure fluctuations is poor, and it is easy to cause the reactants and reaction products to be excluded from the device at the same time, resulting in low processing efficiency; on the other hand, because most of the existing reaction devices adopt intermittent discharge control, the valve works frequently Short service life and poor reliability

Images