Preparation of demulsifying agent for processing mud and sand containing oil and its processing method

Abstract

The invention discloses a preparation of a demulsifier for treating oily sludge and a treatment method thereof, which is characterized in that the preparation method is to add 2.7-4.7Kg of oil soluble waterborne polyethers demulsifier, 2.6-2.8Kg lignin modified amphiprotic macromolecular surfactant, 1.4-1.6Kg of polymer of polyhydric alcohol, ethylene oxide and propylene oxide, and 3.0-3.2Kg of quaternary ammonium salt type cationic starch, to the homoeothermic reaction kettle mounted with a blender, control the reaction temperature at 60+-2 degree C for 0.5-2h after mixing dissolve, add 8-12% by the total weight of methanol and 70-85% by the total weight of glacial acetic acid control the reaction temperature at 60+-5 degree C for 2-4h, and the cool to room temperature to obtain the poly copolymerisate. The treatment process is to convey the oily sludge to storage tank, add demulsifier to break up the chemically bond and have a chemical separation, and send the mixed oily sludge to ultrasonic radiation reactor, and then the oily sludge is delamination and separation. The invention has the advantage of low treatment cost.

Description

technical field [0001] The invention relates to the technical field of petroleum waste treatment, in particular to a preparation method and an application process of a high-efficiency demulsifier for dehydrating and separating oily sludge. Background technique [0002] As we all know, during the drilling and test spraying process of oil extraction, a large amount of crude oil falls on the ground and mixes with soil, sand, water and other substances to form an oil-soil mixture. The oil content of land sludge is generally between 5% and 40%; the specific gravity is 1.5~1.8T / m 3 . Since there are all kinds of domestic waste in the oil extraction site, and the oily mud sand that falls on the ground is also treated as industrial waste, therefore, in addition to soil and sand, the oily mud sand is also mixed with domestic waste such as glass bottles, plastic bags, branches, and other solid waste. thing. The crude oil and other harmful substances in the landed oil mud sand flow ...

AI Technical Summary

Problems solved by technology

For the landing oil with high oil content, valuable value and relatively easy recovery, each oil production team is responsible for recovery or entrusts the surviving unit tertiary industry to be responsible for recovery, establish a simplified oil point, and adopt the method of heating, heating and sedimentation for recovery, recovery The oil sludge after treatment contains a large amount of crude oil, which does not meet the environmental protection requirements, causing secondary pollution; there are many ways to deal with the ground oil and ground oil soil that contain less oil and are difficult to recover. The oil and soil are stored in the joint station, some are sent to the brick factory for brick making, some are thrown directly outside the well site for storage, some are stored in pits dug at the well site, or some are simply buried and incinerated at the well site

This method wastes resources and does not meet environmental protection requirements, and needs further regulation and governance