关键词: 碱渣, 再生, 液化气, 脱臭, 氧化

Abstract: Oxygen-enriched oxidative regeneration technique was substituted the conventional air oxidation process at the 120 kt/a LPG sweetening unit of FCCU of Xian Petrochemical Company. Measures including oxygen-enriched air used as oxidant source, using a gas-liquid distributor to replace the packing in oxidation column and etc., were adopted. The application results showed that as compared with the conventional oxidation process, the oxidation efficiency of alkali waste regeneration was improved significantly; the separation of bisulfide from alkali liquor was good, thus the bisulfide content in tail gas was reduced and the service life of alkali liquor was prolonged. The cost of LPG sweetening reduced 68%, and environmental benefit was significant as well.

Key words: alkali waste, regeneration, liquefied gas, sweetening, oxidize