Oil-bearing sludge decomposition method

Abstract

A decomposition method of effluent oil sludge is characterized in that the effluent oil sludge is added into a treatment tank which can be heated up, according to the weight percentage in the effluent oil sludge, sodium metasilicate, polyether polylol and ethylene diamine tetraacetic acid are added to mixed evenly with the effluent oil sludge, and is reacted to the effluent oil sludge under the condition of being heated up, thereby ensuring that oil, mud and water are separated completely, oil at the upper layer is extracted, and the treatment without social effects of pollution is performed for the rest mud and water. The sodium metasilicate, the polyether polylol and the ethylene diamine tetraacetic acid which are added according to the weight percentage in the effluent oil sludge are respectively 2.5 to 3.0 percent, 0.3 to 0.5 percent, and 0.05 percent. The sodium metasilicate, the polyether polylol and the ethylene diamine tetraacetic acid react to the effluent oil sludge under the condition of being heated up to 70 to 85 Deg C. The three articles are innoxious and are all neutral materials, no secondary pollution is caused, a little dosage is needed, and the decomposition of effluent oil sludge is complete. The invention has the advantages of wide raw material sources, lower price, simple technique and easy operation.

Description

Technical field [0001] The invention relates to a method for decomposing sludge generated in the process of oil extraction in an oil field. Background technique [0002] Sewage sludge is a viscous semi-fluid oily pollutant that is separated from the oil in the process of oil extraction or refining in the oil field. The current treatment methods for sludge are: separation method, decomposition method, reinjection method, landfill method, biodegradation method or incineration method. In addition to the incineration method, the biggest disadvantage of these treatment methods is that the treatment is incomplete and requires a large amount of valuable farmland. The chemical separation and decomposition agents in the separation and decomposition method will cause secondary pollution. Although the incineration method is more thorough, the incineration of sludge containing more than 35% oil does not conform to the principle of energy saving. The sludge produced after oil extraction usual...

AI Technical Summary

Problems solved by technology

In addition to the incineration method, the biggest disadvantage of these treatment methods is that the treatment is not thorough, and it takes up a lot of valuable farmland. The chemical separation and decomposition agents in the separation and decomposition methods will cause secondary pollution.

Although the incineration method is relatively thorough, it is not in line with the principle of energy conservation to incinerate sludge with an oil content of more than 35%.