High-oil colloid-containing sewage treatment device and method

A sewage treatment device and colloidal technology, applied in water/sewage treatment, heating water/sewage treatment, flotation water/sewage treatment, etc., can solve problems such as non-compliance with environmental protection, high cost of large-scale treatment, and breakdown of sewage system. Achieve the effect of solving the problem of purification treatment, less dosage and good effect

CN113912239APending Publication Date: 2022-01-11SHANDONG HYGIYA ENVIRONMENTAL PROTECTION EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-01-11

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Abstract

The invention discloses a high-oil colloid-containing sewage treatment device and method, belonging to the technical field of oil field water treatment. The device comprises a heat source device, a pre-separation oil collection tank, a coagel decoloration tank, a flocculation water purification tank and a dosing device. During operation, the pre-separation oil collection tank only conducts heating and electronic cracking, a coagel decolorizing agent is added into the polygel decoloration tank, and a flocculating agent and a coagulant aid are added into the flocculation water purification tank. The method comprises the steps of heating, vortex and micro-vortex separation, turbulent-flow and micro-rotary-floating air-floating oil removal and coagulation, electronic cracking of emulsified particles, dosing for coagel decoloration and flocculation, adsorption coalescence and settling separation, and thus has the advantages of multiple functions, small dosage and good effect. After treatment with the device and the method, oily sludge contains less than 2% of oil; the water content of oil is less than 30%; the content of oil and suspended matters in water is less than 30 mg / L; and thus, problems in purification treatment of high-oil colloid-containing sewage in an oil field are effectively solved.
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Description

technical field

[0001] The invention relates to a treatment device and method for high-oil colloid-containing sewage, belonging to the technical field of oilfield water treatment. Background technique

[0002] With the development of shale oil and gas fields in the world, the difficulty of drilling and the workload of fracturing are also increasing. Drilling waste fluid and fracturing waste fluid are also becoming more and more complex, and the amount of waste fluid is also increasing. After drilling and fracturing A large amount of waste liquid remains in the well, and enters the oilfield sewage treatment system after being put into production, causing the sewage system to be paralyzed and unable to be treated, which brings hidden dangers to the oilfield safety production. Seriously affect the treatment quality of oil and water, and at the same time, there is a problem of high treatment cost, which is unacceptable to the oil field. For this reason, it is listed as a diffic...

Examples

Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] like figure 1 As shown, a high-oil colloid-containing sewage treatment device includes a heat source device 1, a pre-separation oil collection tank 2, a polygel decolorization tank 3, a flocculation water purification tank 4, a coagulant dosing device 5, and a flocculant dosing device 6. Polymer decolorizing agent dosing device 7, the inlet of the lifting pump is connected to the sewage source, the outlet of the lifting pump is connected to the inlet of the pre-separation oil collection tank 2, the outlet of the pre-separation oil collection tank 2 is connected to the inlet of the polymer decolorization tank 3, and the inlet of the polymer decolorization tank 3 is connected. The outlet of decolorization tank 3 is connected to the inlet of flocculation water p...