A kind of separation method of oil sludge sand

A separation method and oil sludge sand technology, which is applied in the direction of oxidation treatment of sludge, mining wastewater treatment, etc., can solve the problems of high treatment cost and low efficiency of oil sludge sand separation

Active Publication Date: 2011-12-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of low oil and sand separation efficiency and high processing cost in t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment is used to illustrate the separation method of oil sludge sand provided by the present invention.

[0030] Oily mud sand landed in an oilfield, based on the dry basis per kilogram of oily sand, has an oil content of 300g, viscosity (50°C, rotor: MV1, shear rate: 10s -1 ) is 584.3mPa·s; the water content is 45% of the total mass of the oil sludge sand.

[0031] The oil sludge sand is fully mixed with water (pH 4.5) of 0.5 times the quality of the oil sludge sand under mechanical stirring, and then an electric heater is used to control the temperature to 40 ° C, and hydrogen peroxide and catalyst NiSO 4 Mixing, the added mass of hydrogen peroxide is 0.01% of the oily mass in the oil sludge sand, the ratio of the catalyst to the oxidizing agent is 2, and the mixing time is 30 minutes.

[0032] Add stearyl alcohol polyoxyethylene-polyoxypropylene ether demulsifier (trade name produced by Tianjin Auxiliary Factory is crude oil demulsifier SP-169) in the abov...

Embodiment 2

[0041] This embodiment is used to illustrate the separation method of oil sludge sand provided by the present invention.

[0042] The oil sludge from a heavy oil well is based on the dry basis per kilogram of oil sand, the oil content is 200g, the viscosity (50°C, rotor: SV2, shear rate: 10s -1 ) is 2762mPa·s, and the water content is 60% of the total mass of the oil sludge sand.

[0043] The oil sludge sand is fully mixed with water (pH 4.0) twice the quality of the oil sludge sand under mechanical stirring, and then oil bath is used to control the temperature to 70°C with glycerol, and the oxidant sodium hypochlorite and catalyst FeSO 4 Mixing, the dosage of sodium hypochlorite is 0.05% of the oily mass in the oil sludge sand, the ratio of the amount of the catalyst to the oxidant is 1, and the oxidant sodium hypochlorite and the catalyst FeSO 4 The mixing time was 60 minutes.

[0044] Then, the above-mentioned mixture was subjected to gravity sedimentation for 4 hours, an...

Embodiment 3

[0053] This embodiment is used to illustrate the separation method of oil sludge sand provided by the present invention.

[0054] The bottom sludge of a large tank in an oilfield joint station, based on the dry basis per kilogram of oil sand, has an oil content of 600g, oil phase viscosity (50°C, rotor: MV1, shear rate: 10s -1 ) is 457.1mPa·s, and the water content is 35% of the total mass of the oil sludge sand.

[0055] Fully mix the oil sludge sand with water (pH 6.0) with the same quality as the oil sludge sand under mechanical stirring, then use an electric heater to control the temperature to 40 ° C, and mix with the oxidant hydrogen peroxide and the catalyst FeCl 3 Mixing, the dosage of hydrogen peroxide is 0.005% of the oil content in the oil sludge sand, the ratio of the catalyst to the oxidizing agent is 2, and the mixing time is 45 minutes.

[0056] Add phenolic resin polyoxyethylene-polyoxypropylene ether demulsifier (based on the quality of the oil in the oil slu...

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Abstract

The invention discloses a method for separating oily sludge and sands, which comprises the steps of: in the presence of water, carrying out a contact reaction on the oily sludge and sands and a catalyst and an oxidizing agent, and separating to obtain a water phase, a grease phase and sand, wherein the oxidizing agent is a matter capable of oxidizing grease in the oily sludge and sands and reducing the viscosity of the oily sludge and sands, and the catalyst is a matter capable of promoting the oxidizing agent to generate radicals with strong oxidability. According to the method for separating the oily sludge and sands, provided by the invention, the content of oil in oily sludge and sands can be remarkably reduced, therefore, grease, sand and water in oily sludge and sands can be effectively and efficiently separated.

Description

technical field [0001] The invention relates to a method for separating oil mud sand. Background technique [0002] With the extraction of crude oil, a large amount of oily mud sand is carried out of the oil reservoir and deposited at the bottom of various containers and storage tanks in the pumping station. These oily sands cannot be directly used or discharged, and are usually piled up as waste to dry or buried underground, which not only pollutes the environment, wastes resources, but also brings huge economic losses to enterprises. The oil and water contained in the oil mud sand form a stable emulsion, which is firmly adsorbed on the surface and pores of the mud sand, and the adhesion increases with the increase of the average relative molecular mass and viscosity of crude oil. The current conventional methods of separating oil sludge and sand (usually including: incineration, hot washing, steam stripping, solvent extraction, chemical demulsification and biological trea...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F103/10
Inventor 侯钰李本高
Owner CHINA PETROLEUM & CHEM CORP
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