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Crude oil processing unit containing electro-desalted sewage oil remover and method of crude oil processing unit

A crude oil processing and electric desalination technology, which is applied in the fields of grease/oily substance/float removal devices, petroleum industry, separation methods, etc. Fast, easy-to-use effects

Inactive Publication Date: 2012-10-31
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Luoyang Petrochemical adopts a sewage pre-oil removal facility that combines oil separation and coarse-graining, which can remove most of the floating oil in the electric desalination sewage, and the recovered waste oil is reinjected into the inlet of the electric desalination device, realizing a virtuous cycle and achieving a more significant potential tap For synergistic purposes, however, the separated slop oil has a high water content (greater than 10%)
Changling Branch cooperated with China University of Petroleum (East China) to use liquid-liquid cyclone separation technology in the electric desalination device to reduce the oil concentration in the cut water of the electric desalination device, but the biggest problem of this technology is: the separated dirty oil The water content is as high as 80-90%. In addition, it is difficult to ensure the separation effect when the oil content in the incoming water is high (the oil content is greater than 5%)

Method used

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  • Crude oil processing unit containing electro-desalted sewage oil remover and method of crude oil processing unit
  • Crude oil processing unit containing electro-desalted sewage oil remover and method of crude oil processing unit
  • Crude oil processing unit containing electro-desalted sewage oil remover and method of crude oil processing unit

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] According to the aforementioned process flow, the degreasing of the electric desalination sewage is carried out, wherein

[0042] 1. Material properties

[0043] Desalination sewage: flow rate is 20t / h, temperature is 75℃, water density is 1000kg / m 3 , oil density 945kg / m 3 (20℃), oil viscosity is 303mm 2 / s(50℃), oil content 20000mg / L

[0044] 2. The diameter of the drum of the centrifugal extraction separator is 500mm, and the motor speed is 1000rpm.

[0045] 3. Content determination method

[0046] Oil water content is determined according to GB / T8929-2006 Petroleum Product Moisture Determination Method

[0047] The oil concentration in water was determined according to GB / T16488-1996 Determination of water quality petroleum and animal and vegetable oils by infrared photometry.

[0048] 4. Apply Effects

[0049] After being treated by the centrifugal extraction separator, the oil content of the purified water is 44mg / L, the oil removal efficiency reaches 99.78...

Embodiment 2

[0051] 1. Material properties

[0052] Desalination sewage: flow rate is 30t / h, temperature is 60℃, water density is 1000kg / m 3 , oil density 910kg / m 3 (20℃), oil viscosity is 290mm 2 / s(50℃), oil content 1000mg / L

[0053] 2. The diameter of the drum of the centrifugal extraction separator is 600mm, and the motor speed is 1000rpm.

[0054] 3. Content determination method

[0055] Oil water content is determined according to GB / T8929-2006 Petroleum Product Moisture Determination Method

[0056] The oil concentration in water was determined according to GB / T16488-1996 Determination of water quality petroleum and animal and vegetable oils by infrared photometry.

[0057] 4. Apply Effects

[0058] After being treated by the centrifugal extraction separator, the oil content of the purified water is 210mg / L, the oil removal efficiency reaches 79%, the water content of the light-phase outlet slop oil is less than 1%, the main indicators are good, and the properties are similar ...

Embodiment 3

[0060] 1. Material properties

[0061] Desalination sewage: flow rate is 10t / h, temperature is 65℃, water density is 1000kg / m 3 , oil density 935kg / m 3 (20℃), oil viscosity is 300mm 2 / s(50℃), oil content 30000mg / L

[0062] 2. The diameter of the drum of the centrifugal extraction separator is 450mm, and the motor speed is 1000rpm.

[0063] 3. Content determination method

[0064] The water content of oil is determined according to GB / T 8929-2006 Petroleum Product Moisture Determination Method

[0065] The oil concentration in water was determined according to GB / T16488-1996 Determination of water quality petroleum and animal and vegetable oils by infrared photometry.

[0066] 4. Apply Effects

[0067] After being treated by the centrifugal extraction separator, the oil content of the purified water is 77mg / L, the oil removal efficiency reaches 99.23%, the water content of the light-phase outlet slop oil is less than 1%, the main indicators are good, and the properties a...

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Abstract

The invention relates to a crude oil processing unit containing an electro-desalted sewage oil remover, and a method of the crude oil processing unit. The crude oil processing unit includes an electrical desalter and a primary tower, wherein the electrical desalter is provided with a crude oil inlet, an oil outlet and a water drain outlet; the primary tower is provided with an oil phase inlet; and the oil outlet of the electrical desalter is communicated with the oil phase inlet of the primary tower. The crude oil processing unit is characterized in that the electrical desalter is further connected with the primary tower through a centrifugal separation unit so as to separate water and oil in electro-desalted sewage; and the centrifugal separation unit includes an inlet, an oil phase outlet and a water phase outlet, wherein the inlet of the centrifugal separation unit is connected with the water drain outlet of the electrical desalter, and the oil phase outlet of the centrifugal separation unit is communicated with the oil phase inlet of the primary tower. The crude oil processing unit and the method thereof overcome the defects that the present electro-desalted sewage oil removing method and equipment are complicated to operate, have poor effects, good separation effect and high separation speed, are convenient to operate and suitable for long-period operation, realize on-site oil removal of the electro-desalted sewage and recycle of the dirty oil, and have high applicability and high impact resistance.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, and relates to a new method and device for degreasing electric desalination sewage. Specifically, the invention relates to a method for degreasing electric desalination sewage by utilizing centrifugal separation equipment. The invention also relates to an apparatus for use in the method. Background technique [0002] Crude oil contains salts and impurities, which will adversely affect the production and processing of crude oil and the smooth operation and maintenance of equipment. Therefore, desalination must be carried out in refining. In recent years, the recoverable oil has developed in the direction of heavier and inferior quality, which has adversely affected the stable operation of the electric desalination device, making it difficult for the electric desalination sewage to reach the corresponding oil content index. Electric desalination wastewater has become one of the main s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/00C02F1/26C02F1/38C02F1/40
Inventor 白志山徐艳郝萌萌甘仁武
Owner EAST CHINA UNIV OF SCI & TECH
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