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Electric desalting and dewatering method

A technology of electric desalination, dehydration and water injection, which is applied in the directions of electric/magnetic dehydration/demulsification, chemical dehydration/demulsification, electric/magnetic refining, etc. Solve problems such as high salt water content, achieve the effect of reducing oil content in drainage, low oil content in drainage, and simple operation

Active Publication Date: 2015-07-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the deepening of crude oil exploitation in recent years, the proportion of low-quality crude oil is increasing, and the density, viscosity, acid value and impurity content of crude oil are gradually increasing, which leads to many problems in the electric desalination unit of the refinery, mainly manifested as oil-water emulsification Serious, high salt and water content after crude oil desalination, high oil content in drainage, etc., have a great impact on the electric desalination device

Method used

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  • Electric desalting and dewatering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 98% by weight of Luning pipeline crude oil and 2% by weight of water with 5ppm demulsifier AE1910, and pass through the microwave radiation area, where the microwave radiation temperature is 50°C, the radiation time is 5min, and the microwave power is 1000W. After microwave treatment, it enters the electric desalination First-level electrical desalting was carried out in the tank (desalting and dehydration conditions: temperature 110°C, residence time 15 minutes, number of oscillations 200 times, electric field strength 800V / cm), and then the desalted crude oil was taken to analyze the salt and water content. Then keep other conditions unchanged, change the microwave power to 800W, 600W, 400W, 200W respectively, the test results are shown in Table 2.

[0019] Table 2 Results of desalting and dehydration of crude oil transported by Luning pipeline

[0020] serial number

Embodiment 2

[0022] Mix 94% by weight of Puyang mixed crude oil and 6% by weight of water with 10ppm demulsifier FC961, pass through the microwave radiation area, where the microwave radiation temperature is 80°C, the microwave power is 400W, and the radiation time is 30s. After microwave treatment, it enters the electric desalination tank Secondary electric desalting is carried out in the medium, desalination and dehydration conditions: temperature 120°C, residence time 20min, number of oscillations 200 times, electric field strength 800V / cm, and then take the crude oil after desalination to analyze the salt and water content. Then keep other conditions unchanged, change the microwave radiation time to 10min, 5min, 3min, 1min respectively, the test results are shown in Table 3.

[0023] Table 3 Desalting and dehydration results of Puyang blended crude oil

[0024]

Embodiment 3

[0026] Mix 88% by weight of Puyang mixed crude oil and 12% by weight of water with 200ppm demulsifier ERI 1160, pass through the microwave radiation area, where the microwave radiation temperature is 130°C, the microwave power is 800W, and the radiation time is 10min. After microwave treatment, it enters the electric desalination Three-stage electric desalting was carried out in the tank (desalting and dehydrating conditions: temperature 130°C, residence time 20 min, number of oscillations 200 times, electric field strength 800V / cm), and then the desalted crude oil was taken to analyze the salt and water content. Then keep other conditions unchanged, and change the water injection volume to 8%, 4%, 0% respectively. The test results are shown in Table 4.

[0027] Table 4 Desalting and dehydration results of Tahe crude oil

[0028]

[0029] From the test results of Examples 1 to 3, with the desalination and dehydration method of the present invention, the three crude oils wit...

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Abstract

The invention discloses an electric desalting and dewatering method comprising the steps of: adding 5-20 ppm demulsifier in 88-98wt% of crude oil and 2-12wt% of water, and uniformly mixing the ingredients, wherein the demulsifier is counted by the total weight of a mixed solution of the crude oil and the water; and passing the mixed solution by a microwave radiation region with power of 100-1000 W at 50-140 DEG C, performing microwave radiation for 30 s to 10 min, and desalting and dewatering the mixed solution in an electric desalting tank after the microwave radiation. The electric desalting and dewatering method is moderate in conditions, high in desalting and dewatering efficiency, short in oil-water separation time and low in oil content in discharged water.

Description

technical field [0001] The invention relates to refining hydrocarbon oil by electric method or magnetic method, in particular to a method for removing salt and water in hydrocarbon oil by using microwave and pulse. Background technique [0002] Crude oil electric desalting is the first process of crude oil processing, and its purpose is to remove salt, water and other impurities from crude oil. Stable and efficient operation of electric desalination device, corrosion protection and long-term safe operation of atmospheric and vacuum devices, stable operation of downstream secondary processing devices, such as heavy oil catalytic cracking, residual oil hydrogenation, etc., prevention of catalyst poisoning and product improvement Quality has an important impact. [0003] Over the years, researchers have carried out a lot of work and made great achievements on the development of the feeding method, plate structure, power supply method, mixing method and high-efficiency demulsif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/02C10G33/04C10G32/02
Inventor 崔新安彭松梓李春贤申明周王红梅虎锐
Owner CHINA PETROLEUM & CHEM CORP
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