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Coagulant suitable for oil producing wastewater treatment system and using method of coagulant

A technology of oil extraction wastewater and treatment system, which is applied in the direction of mining wastewater treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of reducing COD, difficulty in oil extraction wastewater treatment, and COD exceeding the standard, so as to reduce COD and reduce the pressure of treatment , The effect of reducing operating costs

Inactive Publication Date: 2019-06-21
盘锦辽河油田华联实业集团有限公司
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Problems solved by technology

[0003] In order to solve the problems that the existing oil production wastewater is difficult to treat and the COD exceeds the standard, the present invention proposes a coagulant suitable for the oil production wastewater treatment system and its use method, which can effectively remove the pollutants in the oil production wastewater and reduce the COD

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  • Coagulant suitable for oil producing wastewater treatment system and using method of coagulant
  • Coagulant suitable for oil producing wastewater treatment system and using method of coagulant

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Embodiment 1

[0018] A coagulant suitable for oil production wastewater treatment system, including inorganic flocculant and coagulant aid, the mass ratio of the inorganic flocculant to coagulant aid is 1-5:1; the inorganic flocculant comprises 1.5% of polyaluminum iron silicon, 12‰ of ferrous sulfate hydrate, 0.3‰ of aluminum sulfate, 0.2‰ of rare earth metals, and the balance of deionized water; the coagulation aid is polyacrylamide, the The molecular weight of the polyacrylamide is 2000, and the degree of hydrolysis is 14%. The rare earth metal is one or more of lanthanum, praseodymium, cerium, neodymium and erbium.

[0019] A method for using the above-mentioned coagulant suitable for oil production wastewater treatment system, comprising the following steps:

[0020] Step 1. Add polyaluminum iron silicon, ferrous sulfate hydrate, aluminum sulfate, and rare earth metals into deionized water and stir to dissolve evenly to obtain a mixture of inorganic flocculants. The deionized water, p...

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Abstract

The invention provides a coagulant suitable for an oil producing wastewater treatment system. The coagulant comprises an inorganic flocculant and a coagulant aid at a mass ratio of (1-5):1, wherein the inorganic flocculant comprises the following ingredients by molar percentage: 1 percent-1.7 percent of poly-Al-Fe-Si, 10 per mill-15 per mill of ferrous sulfate hydrates, 0.2 per mill-0.3 per mill of aluminum sulfate, 0.2 per mill-0.3 per mill of rare-earth metals and the balance of deionized water; the coagulant aid is polyacrylamide. The invention also provides a using method of the coagulantsuitable for the oil producing wastewater treatment system. According to the using method, pollutants in oil producing wastewater can be effectively removed, and the COD (chemical oxygen demand) is reduced.

Description

technical field [0001] The invention relates to a coagulant suitable for an oil production wastewater treatment system and a using method thereof. Background technique [0002] In recent years, with the continuous development of marginal oil fields and deep-water oil fields, the oil production wastewater generated during the mining process contains slick oil, emulsified oil, dissolved oil, and other suspended solids. However, it is still difficult to meet the discharge requirements with the current wastewater treatment methods, and COD exceeding the standard is especially serious. Therefore, the treatment of oily sewage poses new challenges, and continuous exploration and improvement are still needed. Contents of the invention [0003] In order to solve the problems that the existing oil production wastewater is difficult to treat and the COD exceeds the standard, the present invention proposes a coagulant suitable for the oil production wastewater treatment system and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F103/10
Inventor 李正任刘明江孙帅范兴超李帅
Owner 盘锦辽河油田华联实业集团有限公司
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