Oil-containing sludge deoiling and dewatering apparatus and oil-containing sludge deoiling and dewatering method

Abstract

The present invention provides an oil-containing sludge deoiling and dewatering apparatus and an oil-containing sludge deoiling and dewatering method. The apparatus comprises: an ultrasonic wave destabilization tank, wherein the ultrasonic wave destabilization tank comprises a first material inlet, at least a jetting input end, a first separation material outlet and a second separation material outlet, and the first separation material outlet has a first forking branch and a second forking branch; an ultrasonic wave transmitting device arranged on the ultrasonic wave destabilization tank; a jetting stirring device, wherein the jetting stirring device comprises a first input end and at least a jet flow spraying nozzle, the first input end is connected to the first forking branch, and the jet flow spraying nozzle is connected to the jetting input end of the ultrasonic wave destabilization tank; an air flotation deoiling tank, wherein the air flotation deoiling tank comprises a second material inlet, a third separation material outlet and a fourth separation material outlet; and an air flotation generating device arranged in the air flotation deoiling tank. According to the present invention, the oil-containing sludge deoiling and dewatering apparatus has characteristics of treatment effect improving, high efficiency and cost reducing, and is convenient for popularization and use.

Description

technical field [0001] The invention relates to oily sludge treatment, in particular to an oily sludge deoiling and dewatering device and method. Background technique [0002] Oily sludge mainly comes from the bottom sludge of the grease trap, the scum of the flotation tank, and the remaining activated sludge, which are collectively referred to as "three sludges". In addition to a large amount of aging crude oil, wax, colloid and other substances, oily sludge also contains a large amount of toxic and harmful substances such as benzene series, phenols, anthracene, pyrene, polychlorinated biphenyls, and dioxins. The mud also contains a large number of pathogenic bacteria and parasites. If it is not treated reasonably and effectively, it will not only waste oil resources, but also cause serious pollution to the environment. [0003] The composition of oily sludge is generally composed of oil-in-water, water-in-oil and suspended solid impurities. The dehydration effect is poor....

AI Technical Summary

Problems solved by technology

[0006] 1) With a single conditioning treatment, it is difficult to effectively remove the emulsified oil-cement mixture, and it is easy to cause the sludge oil content index after centrifugation to be unqualified;

[0007] 2) In order to ensure that the oil content in the oil sludge after mechanical centrifugation meets the requirements, the amount of chemical added is relatively large, which not only requires high operating costs, but also makes subsequent treatment difficult;

[0008] 3) The oil sludge conditioning system adopts an open or open structure, and the volatile gases generated in the homogenization process are not uniformly recovered and processed, and are directly emptied, which not only pollutes the environment, but also is not conducive to on-site operation and maintenance safety

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