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Oil-water separation system and separation method

An oil-water separation and separation system technology, applied in separation methods, liquid separation, dehydration/demulsification by mechanical methods, etc., can solve the problems of complex composition, difficult deep separation, etc. The effect of long-term sustainable operation

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problem in the prior art that it is difficult to achieve deep separation of oil-water mixtures with complex composition, high viscosity, and severe oil-water emulsification through conventional oil-water separation technology, the present invention intends to provide an oil-water separation system and process method, respectively set membrane filtration / breaking Emulsion system, pre-separation system, light phase separation system and heavy phase separation system, membrane filtration / demulsification system to achieve continuous removal of suspended particles in oil-water mixture and preliminary demulsification, pre-separation system to achieve rapid removal of free water droplets or oil droplets , light phase separation zone and heavy phase separation system to realize forced demulsification and coalescence separation of "water-in-oil" or "oil-in-water" materials

Method used

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Examples

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Effect test

Embodiment 2

[0046] The oil-water separation system in Example 1 is used for dehydration and separation of light-phase oil products. The oil product to be separated enters the membrane tube 1011 from the feed port 1013 of the membrane module, and under the filtering action of the membrane tube 1011, the liquid penetrates into the housing 1012 In the process, the remaining concentrated material in the membrane tube 1011 is discharged from the discharge port 1014 of the membrane module, enters the circulation pump 102 and continues to enter the membrane module 101 for multiple filtration and demulsification; The separation system 200 first enters the middle cavity of the hollow filter element 202 from the feed port 204 of the feed pipe. Under the action of the hollow filter element 202, the larger water droplets in the oil are separated and left in the middle of the filter element, while the rest of the material is filtered In the cavity of the hollow filter element 202 and the feed pipe 201,...

Embodiment 3

[0049] The oil-water separation system of Example 1 was used to dehydrate catalytic light diesel (oil is light phase). The properties of the raw oil are shown in Table 1, and the operation process was as described in Example 2. The specific operating conditions are: operating temperature: 40-45°C; operating pressure: 0.3MPaG; residence time: 3.2 minutes.

[0050] After oil-water separation, the water content of the catalytic light diesel oil is 42-88ppm.

Embodiment 4

[0061] An oil-water separation system, which is different from the system in Example 1 in that the upper coalescing and separation zone 302 is made of polyester fibers (lipophilic and hydrophobic) and polypropylene fibers (hydrophilic and oleophobic) mixed and woven in a ratio of 4:1 The X-shaped fiber layers with a dense concave-convex structure are stacked; the lower coalescence and separation zone 402 is made of polyester fibers (oleophilic and hydrophobic) and polypropylene fibers (hydrophilic and oleophobic) mixed in a ratio of 1:5. X-shaped fiber layers with a concave-convex structure are stacked; other structural settings are the same as in Example 1.

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Abstract

The invention discloses an oil-water separation system and a separation method. The oil-water separation system comprises a membrane filtration / demulsification system, a pre-separation system, a lightphase separation system and a heavy phase separation system; the membrane filtration / demulsification system comprises a membrane module and a circulating pump, and the pre-separation system comprisesa feeding tube, a hollow filter element and a steady flow zone; the light phase separation system sequentially comprises a material uniform distributor I, an upper coalescence separation zone and a light phase discharge port from bottom to top; and the heavy phase separation system sequentially comprises a material uniform distributor II, a lower coalescence separation zone, a light phase and heavy phase separation zone and a heavy phase discharge port from top to bottom. The separation system can be used to achieve continuous removal and preliminary of granular suspended matters in a material to be separated, rapid removal of free water drops or oil drops and demulsification and coalescence of a small amount of a heavy phase entrained in a light phase and a small amount of the light phase entrained in the heavy phase, has the advantages of short material residence time, high dewatering / deoiling efficiency and small device size, can realize deep removal of water, especially emulsifiedwater, in an oil product and deep removal of emulsified oil drops in sewage, has obvious advantages in oil-water separation of complex-composition and high-viscosity particle-containing severely emulsified oil products, and enables the moisture or oil removal rate to reach 99% or above.

Description

technical field [0001] The invention relates to an oil-water separation system and a process for oil-water separation using the same, which belongs to the technical field of liquid-liquid separation of immiscible liquids, and is especially suitable for liquids with different densities such as oil dehydration and sewage degreasing. Background technique [0002] The oil-water separation methods in the prior art mainly include gravity sedimentation method, centrifugal separation method, pressurized electric field method, adsorption separation method, air flotation method and the like. In recent years, with the strengthening of the trend of heavy and inferior oil products, the emulsification of oil products has become very serious, resulting in a higher emulsified water content, that is, more water in oil products is emulsified in the "water-in-oil" type. Existence, leading to the separation effect of the oil-water separation process and separation equipment in the prior art is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/06C02F1/40
CPCC02F1/40C10G33/06
Inventor 阮宗琳杨秀娜李经伟金平齐慧敏
Owner CHINA PETROLEUM & CHEM CORP
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