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
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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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