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1. (WO2013159530) METHOD FOR REUSING EXCESS OXYGEN AND RECYCLING CARBON DIOXIDE IN SUPERCRITICAL WATER OXIDATION SYSTEM

Pub. No.:    WO/2013/159530    International Application No.:    PCT/CN2012/085882
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Thu Dec 06 00:59:59 CET 2012
IPC: C02F 1/72
F25J 3/08
Applicants: XI'AN JIAOTONG UNIVERSITY
西安交通大学
Inventors: WANG, Shuzhong
王树众
WANG, Yuzhen
王玉珍
XU, Donghai
徐东海
TANG, Xingying
唐兴颖
GONG, Yanmeng
公彦猛
MA, Honghe
马红和
GUO, Yang
郭洋
Title: METHOD FOR REUSING EXCESS OXYGEN AND RECYCLING CARBON DIOXIDE IN SUPERCRITICAL WATER OXIDATION SYSTEM
Abstract:
A method for reusing excess oxygen and recycling carbon dioxide in a supercritical water oxidation system comprises the following steps : 1) an effluent from a supercritical water oxidation reactor (8) exchanging heat with a heat exchanger (1) and then entering a high pressure gas-liquid separator (2), and an upper fluid, as a hot fluid medium, sequentially entering a heat exchanger coil (3) in a purification tower (5) and a condenser (4) outside the purification tower (5), so as to make the fluid temperature be lower than the liquefaction temperature of carbon dioxide; 2) the fluid from an outlet of the condenser (4) entering the purification tower (5), liquid carbon dioxide at the bottom of the tower exchanging heat with the fluid from an outlet of the high pressure gas-liquid separator (2) through the heat exchanger coil (3) to purify the carbon dioxide, and bottling and recycling the liquid carbon dioxide from an outlet at the bottom of the tower; 3) a fluid in gas phase from the top of the purification tower (5) entering an oxygen buffer tank (6), and then entering the supercritical water oxidation reactor (8) through a high pressure oxygen compressor (7) after being mixed with oxygen provided by the supercritical water oxidation system, so as to reuse the oxygen. The method is widely applicable to supercritical water oxidation treatment systems for organic wastewater/wastes.