Device and method for ultrasonic tank demulsification

Abstract

The invention discloses an ultrasonic wave tank type demulsification device and method. The device is provided with a demulsification tank, wherein the top of the demulsification tank is of an inwards-concave type structure or flat plate type structure, an ultrasonic generator arranged in an anti-explosion cabinet controls an ultrasonic transducer, ultrasonic energy provided by one set of ultrasonic transduction distribution device is re-distributed through an ultrasonic distributor, the ultrasonic generator is arranged in the demulsification tank, a homogeneous liquid is filled in the demulsification tank, an oil-water emulsion enters from the lower part of the tank and flows out from the upper part of the tank after being subjected to the action of ultrasonic waves. The method and device are good in ultrasonic action and contact effect, simple in internal structure and convenient to install, are suitable for demulsifying the oil-water emulsion, and especially suitable for tank type demulsification and dewatering in an oil field or oil refinery.

Description

technical field [0001] An ultrasonic tank-type demulsification device and method belong to the field of petrochemical technical equipment. Background technique [0002] In recent years, with the gradual reduction of petroleum resources and the continuous increase of people's demand for petroleum products, oilfield companies have been prompted to adopt various measures to increase production, using crude oil reserves that were difficult to exploit in the past, and widely applying tertiary oil recovery technologies, such as polymer flooding, multi-component compounding, etc. The extensive application of technologies such as flooding, surface active flooding, alkali flooding, carbon dioxide flooding, and thermal recovery of heavy oil has resulted in intensified emulsification of heavy and inferior crude oil and stable emulsified structure. It is difficult to quickly achieve effective emulsification by traditional thermochemical means. The purpose of oil-water separation. [00...

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Problems solved by technology

Over the years, the research on crude oil demulsification technology is mostly limited to the research of chemical demulsifiers, which has great limitations on different types of crude oil, and the application of demulsifiers has many production and environmental problems: resulting in increased production costs, resulting in The oil content and COD value of the drainage will increase, which will directly affect the normal operation and standard discharge of subsequent sewage treatment

The device is directly refitted to the tank to be treated or the settling tank. Since the upper head of the tank to be treated or the settling tank is a convex structure, the defect is that the ultrasonic transducer needs a long horn length to extend into the demulsification tank. , which directly affects the electro-acoustic efficiency, the ultrasonic waves generated by the ultrasonic distributor cannot effectively affect the oil-water emulsion; when the device is used, it needs to be temporarily refitted to treat the tank or the settling tank to install multiple ultrasonic generators

The ultrasonic distributor directly acts on the oil-water emulsion to cause dead angle or short circuit phenomenon. The equipment structure is complicated, the inspection and maintenance are inconvenient, the manufacturing cost is high, and the reusability is poor.

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