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Oil refining sewage anisotropic medium combined oil removal and suspension removal system and method

A technology for oil refining sewage and heterosexuality, which is applied in the fields of grease/oily substance/float removal device, separation method, water/sewage treatment, etc. , to achieve the effect of good degreasing and suspension removal, small footprint and short residence time

Pending Publication Date: 2022-05-10
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for low-concentration oily sewage, and the treatment effect for high oily sewage is not good.
[0005] Chinese patent CN202010973814.9 discloses a heterogeneous fiber combined deoiling device and method for removing micro-nano suspended particles. The device and method provided by this invention can realize the deep removal of micro-nano suspended particles in sewage, but this method It is mainly aimed at suspended particles in sewage, and it does not work well for oily sewage with high oil content

Method used

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  • Oil refining sewage anisotropic medium combined oil removal and suspension removal system and method
  • Oil refining sewage anisotropic medium combined oil removal and suspension removal system and method
  • Oil refining sewage anisotropic medium combined oil removal and suspension removal system and method

Examples

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Effect test

Embodiment 1

[0060] A company's electric desalination sewage contains a large amount of emulsified oil and tiny solid particles. The oil content in sewage is high and fluctuates greatly, often as high as 2000mg / L, and the oil contained is mainly petroleum, alkanes, naphthenes and aromatics account for 97% of the total, and the COD content fluctuates greatly. It often reaches more than 5000mg / L, and the expected goal is to treat the oil content of electric desalination oily sewage to less than 300mg / L. The company's sewage is treated by using the combined degreasing and suspension system of the present invention.

[0061] The process flow of pilot electric desalination wastewater treatment is as follows: figure 1 As shown: Two-stage treatment is adopted, the first stage is a vertical adaptive cyclone air flotation separation device 3, the height of the vertical separation tank is 126.4cm, the inner diameter is 42.6cm, and the second stage is a foreign fiber particle degreasing device 4, T...

Embodiment 2

[0067] A company adopts a method and device for oil refinery sewage heterogeneous medium combined oil removal and suspension removal according to the present invention. The company's oily sewage contains a small amount of emulsified oil and tiny solid particles. The oil content in sewage is low and fluctuates less, maintaining at about 100mg / L for a long time, and the suspended solids content is maintained at about 120mg / L for a long time. The expected goal is to treat the oil content of sewage to less than 50mg / L. The company's sewage is treated by using the combined degreasing and suspension system of the present invention.

[0068] The difference from the device in Example 1 is that the first stage is a horizontal self-adaptive cyclone air flotation separation device, the length of the horizontal separation tank is 175cm, the inner diameter is 70cm, and the horizontal width of the fast sedimentation module is 20cm; the second stage It is a heterogeneous medium degreasing d...

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Abstract

The invention provides an oil refining sewage anisotropic medium combined oil removal and suspension removal system and method.The oil refining sewage anisotropic medium combined oil removal and suspension removal system comprises a power conveying device, an air dissolving device, a self-adaptive rotational flow air flotation separation device and an anisotropic medium oil removal device which are sequentially connected, and the air dissolving device is used for aerating incoming sewage; the self-adaptive rotational flow air flotation separation device comprises a separation tank body and one or more rotational flow core pipes which are arranged in the separation tank body and are connected in parallel, and water inlets of the rotational flow core pipes are communicated with a water inlet of the separation tank body; a cyclone making device is arranged at the bottom of the cyclone core tube, the cyclone making device comprises a hub and a plurality of guide vanes, and the guide vanes are uniformly distributed on the outer surface of the hub; the foreign medium oil removal device comprises one or more foreign fiber particle oil removers which are connected in series and is used for further separating the water phase discharged by the self-adaptive cyclone air flotation separation device. The combined oil-removing and suspension-removing system is high in operation flexibility, and can realize efficient oil-removing and suspension-removing on oily sewage with various water qualities.

Description

technical field [0001] The invention belongs to the fields of petrochemical industry and environmental protection, and in particular relates to a system and method for oil refinery sewage heterogeneous medium combined oil removal and suspension removal. Background technique [0002] In the field of petroleum exploration and petrochemical industry, a large amount of refining wastewater will be produced in many operating units. The physical and chemical properties of the refining wastewater produced by different operating units are quite different. The refining wastewater contains impurities such as surfactants and suspended solids. Difficulty is the focus and difficulty in the treatment of oily sewage. The current methods for oily sewage mainly include adding chemical agents to demulsify and cooperate with traditional equipment such as inclined plates, air flotation, biochemistry, and swirling flow to treat them. The treated water quality changes the type and dosage of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/24C02F1/38C02F1/00C02F1/52C02F103/36
CPCC02F1/40C02F1/24C02F1/38C02F1/5209C02F2103/365C02F2201/002C02F2001/007Y02W10/10
Inventor 卢浩毛荣成杨强李裕东
Owner EAST CHINA UNIV OF SCI & TECH