Xi'an Jiaotong University

Donghai Xu

Shuzhong Wang

Jie Zhang

Yanmeng Gong

Xingying Tang

Lu Zhou

Yuzhen Wang

Honghe Ma

A supercritical water oxidation treatment system for organic wastewater with a high salinity crystallizes high-salinity wastewater by a low temperature of liquid oxygen, and decreases an inorganic salt content in the wastewater. Under supercritical water conditions, a hydrocyclone () separates most precipitated solid salts in the wastewater, so effectively prevents pipes and the tubular reactor () after the hydrocyclone () from plugging. Inorganic salts are able to be continuously separated from the system by the hydrocyclone () at the bottom of a desalination device, In addition, excess oxygen and gaseous products COare recovered by a separation recovery part. The reaction time and the reaction temperature of supercritical water oxidation reaction are lowered due to the installation of a simple post-treatment unit (). Moreover, the heat of the reactor effluent with a high temperature is recovered in the system, so operation cost of the system is reduced evidently.

Supercritical water oxidation treatment system for organic wastewater with high salinity

A countercurrent tank type supercritical water reactor with a sacrificial lining, comprising a cylinder body and a catalyst tank arranged inside, the upper part of the cylinder body is connected with a top cover, and the lower part of the cylinder body is connected with a spherical head, the inner side of the cylinder body, the inner side of the spherical head and the inner side of the top cover constitute the inner wall of the reactor, wherein the inner wall of the reactor is provided with a high temperature resistance and thermal insulation coating layer, the inner wall of the high temperature resistance and thermal insulation coating layer is provided with a sealing coating layer, and the inner wall of the sealing coating layer is provided with the sacrificial lining. The reactor is of a countercurrent tank type, which can prevent the reactor blockage caused by salt deposition.

Countercurrent tank type supercritical water reactor with a sacrificial lining

Growing community of inventors

Shaanxi, China

Donghai Xu