A kind of oil sludge demulsifier and oil sludge advanced treatment process

Abstract

The invention discloses an oil sludge demulsifier and an oil sludge advanced treatment process. The oil sludge demulsifier comprises the following components in parts by weight: 7-28 parts of polyglycerol fatty acid ester, 3-14 parts of oleic acid polyoxyethylene ester, 0.5-2 parts of a green accessory ingredient and 58-92 parts of water. The oil sludge advanced treatment process comprises the following steps: enabling oily sludge to enter a sludge mixing tank for demulsification treatment and then carrying out solid-liquid separation; enabling filter liquor to enter a two-phase swirler for separation; enabling lower-layer residual sludge to reflux to a sludge tank; enabling an upper-layer mixed liquor to enter a gas-liquid mixing tank to be mixed with air and to enter a separation tank for oil-water separation; recycling sump oil to a sump oil tank; performing following-up treatment on sewage. The oil sludge advanced treatment process can reduce the moisture content of oily sludge, recycles most crude oil in oil sludge, and reduces the difficulty of sludge follow-up treatment; the oil sludge advanced treatment process is wide in application rang, and is particularly applicable to treatment of tank-bottom oil sludge, scum and activated sludge, and treatment of various kinds of oily sludge generated by oil exploitation and storage and transportation companies.

Description

technical field [0001] The invention relates to an oil sludge demulsifier and a preparation method thereof, in particular to an environment-friendly oil sludge demulsifier containing polyglycerin fatty acid ester and a preparation method thereof; the invention also relates to an oil sludge advanced treatment process. Background technique [0002] A large amount of black solid and semi-solid waste containing oil will be produced in the process of oil extraction, gathering and transportation, refining and oily sewage treatment, which is called oil sludge (referred to as oil sludge), and its main components are oil, mud and water. The size of solid particles in oil sludge can range from less than microns to several inches, most of which are between 1 and 100 microns. The composition of oil depends on the type of crude oil, refinery structure and operating conditions. The composition of sludge may change over time. According to statistics, China's annual output of oil sludge is ...

AI Technical Summary

Problems solved by technology

The demulsifier has good interfacial activity and penetration ability, and has good demulsification ability for crude oil emulsion, but the preparation of the demulsifier is complicated, the cost is high, and it is not conducive to practical application

CN102041038A discloses a treatment method for heavy oil aging oil. The invention firstly provides a broken oil for heavy oil aging oil prepared by mixing phenol, styrene, polyethylene polyamine, formaldehyde, ethylene oxide and propylene oxide. Emulsion, the demulsifier has a good demulsification function and can achieve the destruction of the oil-water interface film, but the biodegradability is poor, and the subsequent impact on the environment is great

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