Xi'an Jiaotong University

Yuzhen Wang

Shuzhong Wang

Jie Zhang

Xingying Tang

Yanhui Li

Mengmeng Ren

Yanmeng Gong

Donghai Xu

An intermediate medium heat exchanging device for a supercritical water oxidation system includes a material main loop, an intermediate medium loop and a replenishment branch. A material pump, a preheater, a spray desuperheater, a reactor and a regenerator are connected in sequence to form the material main loop; a buffer tank, a circulating pump, the regenerator, the preheater and a water cooler form the intermediate medium loop. A back pressure valve is located above the buffer tank. The replenishment branch includes a cooling water pump, an outlet of the cooling water pump is divided into two sub-branches, one sub-branch is connected with the spray desuperheater, and another sub-branch is connected with the buffer tank. The intermediate medium heat exchanging device is reasonable in structural design, and is able to maximumlly reduce the investment cost and ensure the stable operation of the system.

Intermediate medium heat exchanging device for supercritical water oxidation system

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

Growing community of inventors

Shaanxi, China

Yuzhen Wang