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Process system and process method for washing desalination and oil-water separation

A process system and separation system technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve problems such as poor mixing of injected water and oil, difficulty in achieving washing and desalting effects, and poor deep separation of oil and water. , to achieve good applicability and use effect, small equipment size and short residence time

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

AI Technical Summary

Problems solved by technology

[0007] For oil-water mixtures with complex composition, high salt content, and severe oil-water emulsification in the prior art, through conventional oil-water separation technology, the mixing degree of injected water and oil products is poor, and it is difficult to achieve good washing and desalination effects and deep oil-water separation. In order to solve problems such as poor effect, the present invention intends to provide a process system and process method for washing desalination and oil-water separation, respectively setting up a pre-mixed washing system, a pre-separation system, a light phase separation system and a heavy phase separation system, and the pre-mixed washing system realizes oil-water separation. The salt in the mixture is fully dissolved, the pre-separation system realizes the rapid removal of free water droplets, the light phase separation zone and the heavy phase separation system realize the forced demulsification and coalescence separation of materials

Method used

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  • Process system and process method for washing desalination and oil-water separation
  • Process system and process method for washing desalination and oil-water separation
  • Process system and process method for washing desalination and oil-water separation

Examples

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Effect test

Embodiment 1

[0042] A process system for washing desalination and oil-water separation, such as figure 1 As shown, it includes a pre-mixed washing system 100, a pre-separation system 200, a light phase separation system 300 and a heavy phase separation system 400;

[0043] The premixed washing system 100 includes a mixer 101 and a fiber membrane washing assembly 102, the mixer 101 is connected to the fiber membrane washing assembly inlet 1021, and the fiber membrane washing assembly 102 includes a housing 1023, a distributor 1022 and a fiber membrane Membrane bundle 1024, distributor 1022 is a shower head type, the upper end is connected to the feed port 1021 of the fiber membrane washing assembly, and several fiber membrane bundles 1024 are arranged below the distributor 1022. The fiber membrane bundle 1024 includes a large number of bundled fiber filaments, and the fiber filaments are polyester Composite fiber filaments of fiber filaments and stainless steel fiber filaments, fiber film b...

Embodiment 2

[0050] Use the process system of Example 1 to wash and desalt the oil (where water is the heavy phase) and separate the oil from water: the material to be treated is poured into the mixer 101, water is added to it and pre-mixed by force, and the fiber membrane washing module feeds 1021 enters the distributor 1022 and contacts with the surface of the fiber membrane bundle 1024, the salt in the material to be treated is fully dissolved in water, and part of the material is pumped into the circulation pump 103 through the outlet 2027 of the fiber membrane washing module and continues to enter the fiber membrane washing module 102 Washing and dissolving for many times, part of the material enters the pre-separation system 200 from the shell outlet 1026, and first enters the middle cavity of the hollow filter element 202 from the feed pipe inlet 204. Under the action of the hollow filter element 202, the oil in the oil Large water droplets are separated and left in the middle of the...

Embodiment 3

[0053] The process system of Example 1 was used to desalt and dehydrate crude oil (see Table 1 for properties of crude oil), and the operation process was as described in Example 2. The specific operating conditions are: operating temperature: 110-115°C; operating pressure: 0.5-0.8MPaG; total residence time: 13 minutes; water injection volume is 3% of the mass of raw oil.

[0054] After washing, desalting and oil-water separation, the salt content in the oil is 2.76mg / L-2.93mg / L, and the water content is 380ppm-498ppm.

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Abstract

A process system for washing desalination and oil-water separation comprises a premixing washing system, a pre-separation system, a light phase separation system and a heavy phase separation system; the premixing washing system comprises a mixer and a fiber membrane washing assembly, and the pre-separation system comprises a 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 separationsystem 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 full dissolution of salts in a material to be separated, rapid removal of free water 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 salt washing / dehydration efficiency and small device size, has significant deep desalination and dehydration effects especially on high-viscosity and high-salt severely emulsified oil products, and enables the moisture removal rate of theoil products to reach 99% or above and the salt content to be less than 3 mg / L.

Description

technical field [0001] The invention relates to a process system for washing desalination and oil-water separation and a process method for oil-water separation using the process system, belonging to the technical field of liquid-liquid separation of mutually immiscible liquids. Background technique [0002] Crude oil contains water and inorganic salts such as sodium chloride, calcium chloride, and magnesium chloride. It needs to be dehydrated and desalted before processing. This is mainly due to the impact of salt and water in crude oil on crude oil storage, processing, product quality and equipment Both cause great harm, mainly as follows: (1) Increase the load of storage, transportation and processing equipment (such as oil tanks, tank trucks or oil pipelines, pumps, distillation towers, heating furnaces, and cold exchange equipment), increase power and heat energy and cooling water consumption; (2) It affects the normal operation of the distillation unit. When distilling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02
CPCC10G53/02C10G33/02C10G31/08C10G33/06C10G33/00B01D17/00C10G2300/104C10G2300/302C10G2300/308B01D11/0488B01D17/02B01D17/04B01D17/045B01D11/0449
Inventor 阮宗琳杨秀娜金平齐慧敏王昊辰
Owner CHINA PETROLEUM & CHEM CORP
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