A kind of oil sludge demulsifier and oil sludge treatment process

Abstract

The invention discloses an oil sludge demulsifier and an oil sludge treatment process. The oil sludge demulsifier comprises the following components in parts by weight: 6-30 parts of fatty acid methyl ester ethoxylate, 2-13 parts of lauramidopropyl hydroxy sulfoBetaine, 0.5-1 part of a green accessory ingredient and 56-91 parts of water. The oil sludge treatment process comprises the following steps: enabling oil sludge in a raw material storage sludge tank to enter a sludge mixing tank; adding the oil sludge demulsifier for demulsification treatment; enabling demulsified oil sludge to enter a stacked spiral type sludge dewatering machine for solid-liquid separation to obtain a filter liquor and a sludge cake; enabling the filter liquor to enter a gas-liquid mixing tank to be mixed with air; enabling the mixture to enter a separation tank for three-phase separation of oil, water and sludge. The oil sludge treatment process can reduce the moisture content of oily sludge from 80-98% to about 50%, can further recycle most crude oil in the oily sludge, and greatly reduces the difficulty of sludge follow-up treatment.

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 fatty acid methyl ester ethoxylate and a preparation method thereof; the invention also relates to an oil sludge 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 near...

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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