Deep processing technology of heavy and inferior crude oil?

The following is the related content of the deep processing technology of heavy and inferior crude oil brought by Zhongda Consulting for your reference.

With the depletion of conventional crude oil resources, the world crude oil supply is showing a trend of heavy quality and inferior quality. Considering the availability of resources, the economic benefit per ton of crude oil and the adaptability of equipment, it is an important technical problem for China oil refining enterprises whose overall dependence on imported crude oil is over 6%.

During the 13th Five-Year Plan period, national policies will continue to guide the upgrading of the oil refining industry, speed up structural adjustment and open the downstream to private enterprises. At the same time, China's oil refining industry is also facing the pressure of increasingly strict environmental protection and rising clean fuel standards. Under this background, China Petroleum and Petrochemical Engineering Research Association will hold the "Sixth (217) Oil Refining Technology and Deep Processing Technology and Equipment Supply and Demand Exchange Conference" in Luoyang from April 12 to 14, 217 to promote technical exchanges and cooperation between oil refining (refining) enterprises, scientific research, design, equipment manufacturing units and related industries.

classification and problems of crude oil containing sulfur and acid

general classification of crude oil by sulfur content and acidity

the biggest problem in processing high-sulfur crude oil and high-acid crude oil is corrosion, and the corrosion problems brought by them are different. The corrosion problem caused by processing high-acid crude oil is mainly concentrated in the distillation unit. When processing high-sulfur crude oil, due to the continuous transformation of inactive sulfur in crude oil to active sulfur, sulfur corrosion exists not only in the primary processing unit, but also in the secondary processing unit, and even extends to the downstream chemical unit, which runs through the whole process of refining. The content and existing forms of sulfur in different fractions of crude oil are different, but they all increase with the increase of boiling point and are enriched in residual oil.

processing of acid-containing and high-acid crude oil

composition and structure of high-acid crude oil

corrosion of acid-containing crude oil and general rules

processing of acid-containing crude oil usually has the following types:

1. Mixing with low-acid crude oil, and controlling the acid value ≯.5mgKOH/g after mixing.

2. When processing crude oil with low acid value alternately, protective film or thin layer coke may be produced at high temperature to reduce corrosion.

3. material upgrade:

at t > 22℃, use 316L and above materials.

For large-diameter pipelines, steel pipes made of stainless steel composite plates are used.

elbows with large radius of curvature and mitered branch tees are used for the parts where severe erosion can be predicted.

while upgrading materials, optimize and turn on electric desalting.

4. inject NaOH for neutralization. However, because of the increase of Na+,it brings adverse effects to heavy oil catalytic, coking and oxygenation units, which is not the fundamental method. Only emergency

5 and deacidification treatment < P > can completely solve the corrosion problem, and deacidification treatment must be carried out. At present, deacidification treatment methods mainly include alkaline deacidification, esterification deacidification, catalytic thermal deacidification, catalytic hydrogenation deacidification (fixed bed) and catalytic decarboxylation cracking technology.

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Processing of sulfur-containing and high-sulfur crude oil

Characteristics of sulfur-containing and high-sulfur crude oil

Sulfur distribution during processing of high-sulfur crude oil

Corrosion mechanism of high-sulfur crude oil

1. Process corrosion prevention

Process corrosion prevention is one of the main means. Taking "one-off and three-injection" as an example, the deep desalination index of some foreign refineries reaches 1mg/L, while domestic refineries often fail to reach 3 mg/L; In foreign countries, organic amines are mainly used to neutralize corrosion inhibitors, while in China, ammonia water is mainly injected and the effect of corrosion inhibitors is not ideal. In foreign countries, the process anti-corrosion technology is used in the top system of fractionator, but in China, except for the top system of distillation tower, there are not many other top systems of fractionator.

2. Reasonable material selection

The material situation of the production device should be considered, and the maintenance cost of the device caused by corrosion and the long-term safe operation of the device should be analyzed. The materials used abroad are generally of high grade, and dual-phase stainless steel Monel and Hastelloy alloy are rarely used at the top of fractionator in China. Foreign countries have material selection standards for processing different crude oils, while domestic ones are few and not detailed, and examples of using wrong materials or mixed materials in actual production often occur.

3. On-line monitoring

Monitoring technology has been widely used abroad, and tens of thousands of detection points are arranged in the atmospheric and vacuum distillation system alone, and the detection results enter the DCS system through the network; Some core equipment or devices such as reactors and furnace tubes all adopt monitoring technology and service life evaluation.

4. Management system

Strengthen the management of anti-corrosion. Fully considering the anti-corrosion measures will help each refinery to reasonably select equipment and pipeline materials during reconstruction and expansion, and at the same time consider the anti-corrosion measures of equipment to prevent hydrogen sulfide corrosion and leakage.

High-end Conference

China Petroleum and Petrochemical Engineering Research Association will hold the 6th (217) Supply and Demand Exchange Meeting on Refining Technology and Deep Processing Technology and Equipment of Heavy and Inferior Crude Oil in Luoyang from April 12 to 14, 217.

this meeting intends to invite relevant leaders and experts from PetroChina, Sinopec, CNOOC, local refineries and their subordinate units to give special reports on the current situation and new technologies of the refining industry, and the participants will have technical exchanges on how Chinese refining enterprises respond to the current situation and development trend. Focus on clean fuel production, heavy and inferior oil processing, residue hydrogenation, new product development, safety, environmental protection, energy saving, refinery efficiency improvement and competitiveness, etc., and exchange innovative achievements to promote the technological progress of refinery enterprises.

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Topics to be exchanged at the meeting

1. Development and prospect of the world and China's oil refining industry during the 13th Five-Year Plan;

2. Current situation of processing technology of heavy and inferior crude oil in China's refining industry;

3. Technical and economic analysis of enterprise upgrading under the background of low oil price;

4. introduction, evaluation and analysis of deep processing production technology of heavy and inferior crude oil;

5. residue hydrogenation technology and wax oil hydrogenation technology;

China Petroleum and Petrochemical Engineering Research Association

6. Technical progress of combined hydrogenation, desulfurization, upgrading and quality upgrading;

7. Research on new hydrogen production and hydrogenation processes and optimization and application of hydrogen resources;

8. application of new catalytic cracking technologies, new catalytic materials and new catalysts;

9. Application progress of new delayed coking technology;

1. isooctane project investment and environment-friendly isooctane production technology;

11. Corrosion and protection technology of heavy and inferior crude oil processing units;

12. Development and competitive analysis of methanol gasoline, ethanol gasoline, LNG/CNG and biodiesel;

13. Refinery safety, environmental protection, energy saving and emission reduction solutions;

14. Treatment technology of odor and VOC in refinery;

15. Lubricating oil production and blending technology;

16. Production technology of modified asphalt;

17. Application of automation and intelligent technology in improving the operation efficiency of refinery;

18. New refining processes, technologies, equipment and materials.

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