Supercritical water oxidation reaction device

Abstract

The invention discloses a supercritical water oxidation reaction device, which comprises: a reactor; a first inlet formed in the upper portion of the reactor, wherein reaction gas is introduced into a reaction area through the first inlet; a second inlet formed in the upper portion of the reactor, wherein a reaction liquid is introduced into the reaction area through the second inlet; an outlet located in the middle of the reactor, wherein the liquid and the residual reaction materials in the reaction area are discharged through the outlet; and a heat exchange module located at the bottom of the reactor, wherein the heat exchange module adopts a sand grain material with a preset temperature to carry out heat exchange on the reaction liquid, the top of the sand grain material is lower than the outlet, and the preset temperature is higher than the supercritical temperature of the reaction liquid. According to the supercritical water oxidation reaction device, the time for organic wastewater to reach the supercritical water state is shortened by adopting the heat exchange module, so that corrosion to the reaction device is reduced.

Description

technical field [0001] The invention relates to the technical field of organic wastewater purification, in particular to a supercritical water oxidation reaction device. Background technique [0002] The treatment of high-concentration, toxic and refractory organic wastewater is a recognized problem at home and abroad. Traditional organic wastewater treatment technologies (such as physical and chemical treatment technology, biological treatment technology, wet oxidation, incineration, etc.) have problems such as high cost, low degradation rate, and easy secondary pollution. [0003] Supercritical water refers to water when the density of water expanded due to high temperature is exactly the same as the density of water vapor compressed due to high pressure when the pressure and temperature reach a certain value. At this time, there is no difference between the liquid and gas of water, and they are completely blended together to become a new high-temperature and high-pressur...

AI Technical Summary

Problems solved by technology

The processing of a large number of micropores itself seriously weakens the corrosion resistance of the isolation wall, causing its isolation layer such as: the air layer or the evaporation wall layer is also fragile, resulting in the oxidation reactor system not being able to operate for a long time

At the same time, there is also a contradiction between the isolation of the isolation layer and the heat exchange in the design of the isolation layer, and it is difficult to make the reactor larger

Therefore, relying solely on the idea of ​​isolation to solve the corrosion problem of supercritical water is not the ultimate solution in the face of the defects of the technology itself.

Images