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Treatment system and method for dehydration and desalination of crude oil

A crude oil dehydration and treatment system technology, which is applied in the field of crude oil dehydration and desalination treatment systems, can solve the problems of unqualified salt and water content indicators, high oil content and water content, increase the number of oil-water mixing and separation, improve dehydration and desalination, and prolong the The effect of service life

Active Publication Date: 2019-10-11
SINOPEC ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The crude oil dehydration and desalination treatment system of the present invention can solve the problem in the prior art that the crude oil content and water content of crude oil after pretreatment in the crude oil storage tank are relatively high, which will have a large impact on downstream devices such as electric desalination devices, resulting in Salt and water content indicators are often unqualified

Method used

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  • Treatment system and method for dehydration and desalination of crude oil
  • Treatment system and method for dehydration and desalination of crude oil
  • Treatment system and method for dehydration and desalination of crude oil

Examples

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Effect test

Embodiment 1

[0079] A treatment system for crude oil dehydration and desalination, such as figure 1 As shown, it includes a crude oil storage tank 1 and a return line 5; both ends of the return line 5 communicate with the bottom of the crude oil storage tank 1 to form a closed loop; the crude oil storage tank 1 is provided with an inlet distributor 4 The liquid inlet distributor 4 communicates with the drain port of the return line 5; the return line 5 is provided with a delivery pump 2 and a valve 3; the return line 5 is provided with a demulsifier injection port and a corrosion inhibitor injection port Entrance;

[0080] The method for dehydrating and desalting crude oil comprises the following steps:

[0081] Put the crude oil into the crude oil storage tank 1, firstly carry out the thermal sedimentation treatment, the temperature of the thermal sedimentation is 75°C, and the standing time is 7 hours. After the oil and water are separated, drain the water, and transport the drain water...

Embodiment 2

[0083] A treatment system for crude oil dehydration and desalination, same as Example 1;

[0084] The method for dehydrating and desalting crude oil comprises the following steps:

[0085] Put the crude oil into the crude oil storage tank 1, firstly carry out the thermal sedimentation treatment, the temperature of the thermal sedimentation is 65°C, and the standing time is 8 hours. After the oil and water are separated, the drain is carried out, and the drain is transported again through the return pipeline 5 by the delivery pump 2 To the bottom of the crude oil storage tank 1, the water is evenly distributed through the liquid inlet distributor 4, and the oil and water are mixed. At the same time, 7 μg / g of RUN-131 oil-soluble demulsifier and 12 μg / g of corrosion inhibitor benzotriazole are added, and the water is drained into the crude oil storage tank. The temperature of the tank is 60°C, and the residence time is 36h. After standing for stratification, the oil and water ar...

Embodiment 3

[0087] A treatment system for crude oil dehydration and desalination, same as Example 1;

[0088] The method for dehydrating and desalting crude oil comprises the following steps:

[0089] Put the crude oil into the crude oil storage tank 1, firstly carry out the thermal sedimentation treatment, the temperature of the thermal sedimentation is 65°C, and the standing time is 8 hours. After the oil and water are separated, the drain is carried out, and the drain is transported again through the return pipeline 5 by the delivery pump 2 To the bottom of the crude oil storage tank 1, distribute water evenly through the liquid inlet distributor 4, and mix oil and water. At the same time, add JH-1 water-soluble demulsifier 20μg / g, corrosion inhibitor benzotriazole 20μg / g, and drain into the crude oil storage The temperature of the tank is 60°C, and the residence time is 30h. After standing for stratification, the oil and water are separated, and the water content and salt content of t...

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Abstract

The invention relates to the field of crude oil storage and transportation, in particular to a treatment system and method for dehydration and desalination of crude oil. The treatment system for dehydration and desalination of the crude oil comprises a crude oil storage tank and a backflow pipeline, wherein the two ends of the backflow pipeline are both communicated with the bottom of the crude oil storage tank to form a closed loop, and the backflow pipeline is provided with a delivery pump; the backflow pipeline is provided with an injection port of a demulsifying agent and a corrosion inhibitor. According to the method for dehydration and desalination of the crude oil, the crude oil storage tank is used for separating oil and water in the crude oil; the discharged water is circularly conveyed into the crude oil storage tank, and oil and water separation is carried out again; in the backflow process, an appropriate quantity of demulsifying agent and corrosion inhibitor are added, desalination and dehydration of the crude oil are carried out better through a certain water discharge temperature and standing time, and the pressure of a downstream water treatment unit is reduced. Themethod has the advantages that the technological requirements are simple, field construction is easy, and the method is convenient and fast.

Description

technical field [0001] The invention relates to the field of storage and transportation of crude oil, in particular to a treatment system and method for dehydration and desalination of crude oil. Background technique [0002] As oil exploration enters the middle and later stages, crude oil becomes more and more inferior and heavy. For the electric desalting device, which is the first in the crude oil processing process, it is also affected the most, and the salt and water content indicators after desalination often fail. , especially oil refineries that mainly process heavy oil. Therefore, with the trend of increasing the proportion of heavy oil processing, the problem of excessive crude oil after desalting by electric desalter will be a problem that refiners have to face. [0003] In addition to storing crude oil, crude oil storage tanks also play an important role in the primary separation of oil and water. Generally, the oil-water separation process of crude oil storage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C10G75/02
CPCC10G33/04C10G75/02
Inventor 曹振兴吴振华郭辉王维宗段永锋申明周
Owner SINOPEC ENG GRP CO LTD
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