Method and apparatus for treating oily sludge

Abstract

The invention discloses a method and apparatus for thoroughly treating oily sludge in a whole process based on the process principle of a chemical thermal washing method. The treatment method mainly comprises the following steps: (1) removing impurities, adding chemicals and water, and demulsifying after mixing is completed; (2) primarily recycling an oil phase to obtain a mixed solution; (3) recycling a residual oil phase in the mixed solution after ultrasonic and ozone oxidation advanced treatment is performed; and (4) concentrating and dehydrating the obtained mixed solution, and completingthe treatment. The efficient and continuous oily sludge treatment method and apparatus in the invention realize three-phase separation of oil, water and sludge in the oily sludge, and the oil contentof the treated sludge can be reduced to lower than 2 percent, thereby meeting the national discharge standard; moreover, most of the oil phase components in the oily sludge can be recycled, and the recycling rate reaches up to 98 percent; and the separated water phase is completely recycled, the residual chemicals and heat in the waste water are effectively utilized, the load of subsequent watertreatment is reduced, and the treatment effects of energy conservation, emission reduction and green economy are achieved.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a treatment method and device for oily sludge. Background technique [0002] In today's society, energy and environmental issues are becoming more and more prominent, and oil field environmental pollution is the focus of these two major issues. Among them, oily sludge has become the focus and difficulty of oilfield environmental pollution due to its large output, complex composition, and high difficulty in treatment. [0003] Oily sludge refers to a complex composition and the danger of polluting the environment due to the mixing of soil and other various compounds in the process of oil extraction, refining, production, processing, and transportation, resulting in the inability of the oil components to be effectively utilized. waste. Its main components are water, clay particles, chemicals, organic matter, microorganisms and their metabolites and mineral oil, etc., wherein ...

AI Technical Summary

Problems solved by technology

[0009] 1) The process flow is short and the processing cycle is long;

[0010] 2) The treatment process produces a large amount of waste water that cannot be reused, and the reuse rate of chemical agents is low;

[0011] 3) The required energy consumption is high, and the sludge treatment is not up to standard

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