Normal-temperature air wet oxidation catalyst used for residuum processing wastewater deodorization reuse

Abstract

The invention relates to a normal-temperature air wet oxidation catalyst used for residuum processing wastewater deodorization reuse. The catalyst is characterized in that the catalyst is obtained by treating active alumina as a carrier and a transition metal element as a main active component through a fractional deposition-immersion method, and the catalyst comprises 3.0-4.0wt% of a transition metal oxide, 1.0-2.0wt% of a rare earth metal oxide and 7.8-8.8wt% of a semiconductor metal oxide. The catalyst has the advantages of good deodorizing effect, effective removal of sulfides and ammonia nitrogen in wastewater, reduction of the COD of the wastewater, regeneration performance, reusability, no formation of new pollution, mild operation condition, and substantial reduction of the deodorization cost of the wastewater through utilizing air as an oxidant.

Description

Technical field [0001] The waste water treatment field of the present invention is specifically a room temperature air wet oxidation catalyst used for the deodorization and reuse of residual oil processing waste water. Background technique [0002] Coking (or delayed coking) is an important method of residual oil processing. A large amount of cold coking water and cutting coke water are required in the process of coking the residual oil (Zhang Tiegang, Sui Xuying, Li Botao, Ji Hemu. Water saving measures for delayed coking devices[J] ]. Energy saving and environmental protection, 2008, (11): 9-11), the cold coke water and cut coke water after use contain sulfides, mercaptans, sulfides, disulfides, ammonia, volatile phenols, benzenes, and anilines Foul-smelling substances such as species. As the cold coke water and coke cut water are recycled in the delayed coking unit, the odorous substances are enriched in the cold coke water and cut coke water and dispersed into the atmosphere...

AI Technical Summary

Problems solved by technology

[0004] The above several waste water deodorization methods have weak points: 1) consume a large amount of reagents (such as flocculant, H 2 o 2 oxidant), not only the cost is high, but also the flocculated sludge needs to be further treated; 2) the deodorization of petrochemical wastewater is carried out under higher temperature and pressure, resulting in higher wastewater treatment costs