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Method for treating high acid-containing crude oil

A processing method and crude oil technology, which is applied in the processing of hydrocarbon oil, hydrotreating process, petroleum industry, etc., can solve problems such as low service life of equipment, failure to meet corrosion resistance, and product quality impact, so as to reduce equipment cost and meet production requirements. Process and equipment life, the effect of improving product quality

Active Publication Date: 2013-08-21
CNOOC OIL & PETROCHEMICALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned equipment can generally meet the requirements for processing crude oil with conventional acidity, but when using such equipment to process high-acid crude oil, such as Penglai high-acid crude oil, it cannot meet the anti-corrosion requirements, and the service life of the equipment is low. Affected by corrosion of equipment, increasing the cost of subsequent treatment

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  • Method for treating high acid-containing crude oil
  • Method for treating high acid-containing crude oil
  • Method for treating high acid-containing crude oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] This example is used to illustrate the treatment method for high acid crude oil provided by the present invention.

[0108] use figure 1 The process flow shown is to process the Penglai PL19-3 crude oil after electro-desalting. Among them, the properties of No. PL19-3 crude oil are shown in Table 1 above. After electric desalting, the salt content is less than 3 mg / L (test method GB6532-86), the water content is less than 0.1% by weight (test method GB260-77), and the sodium content Less than 1 mg / L (atomic absorption spectrometry). The processing capacity is 12 million tons / year. The atmospheric tower in the atmospheric and vacuum distillation equipment has a total of 44 trays, and the tower body between the top of the tower and the 40th tray is made of 16MnR steel with a thickness of 22 mm and Monel alloy with a thickness of 3 mm by explosive welding. The metal composite material obtained, the material of the tray is SAF2205, the material of the tower body between ...

Embodiment 2

[0126] This example is used to illustrate the treatment method for high acid crude oil provided by the present invention.

[0127] According to the method of embodiment 1, the PL19-3 crude oil with an acid value content of 3.3 mg KOH / gram is processed. The difference is that only the atmospheric tower, vacuum tower, atmospheric furnace and vacuum distillation equipment The material of the pressure furnace is the same as that of Example 1, and the material of other parts or parts shown in Table 2 is the material 16MnR used in conventional atmospheric and vacuum distillation equipment. The materials of the hydrocracking reactor, the high-pressure separator and the low-pressure separator in the hydrocracking equipment are the same as in Example 1, and the materials of other parts are low-alloy steel plates commonly used in the field. Except for the heating furnace, the delayed coking equipment is made of carbon steel 16MnR steel, and the pipeline is made of 20# steel.

[0128]It...

Embodiment 3

[0130] This example is used to illustrate the treatment method for high acid crude oil provided by the present invention.

[0131] According to the method of Example 1, the acid value content is 3.5 mg KOH / gram No. PL19-3 crude oil is processed, and the difference is that the material of the atmospheric and vacuum distillation equipment is as shown in Table 7, and the material of the hydrocracking equipment is as shown in Table 7. As shown in Table 8, and the inlet of the pipe end of the hydrocracking product air cooler is not lined with titanium, the material of the convection tube and radiation tube of the delayed coking equipment is 321H, the material of the inlet line of the radiant section is 321, and the material of the outlet line of the radiant section is 321H. The material is 316L.

[0132] Table 7

[0133]

[0134]

[0135] Table 8

[0136]

[0137]

[0138] It was found that after one year of continuous operation of the equipment, the corrosion amount ...

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Abstract

The invention discloses a method for treating high acid-containing crude oil. The acid value of the high acid-containing crude oil is 3 to 5 mg KOH / g. The method comprises the following steps: performing normal reduced pressure distillation on the high acid-containing crude oil to obtain tower top gas component, first distillate oil, second distillate oil, third distillate oil, fourth distillate oil, fifth distillate oil and tower bottom residual oil from low to high distillation range, catalytically reforming the first distillate oil, hydrocracking the distillate oil A which comprises the second distillate oil and the third distillate oil or the distillate oil B which comprises the second distillate oil, the third distillate oil and at least part of the fourth distillate oil, catalytically cracking the fifth distillate oil or the fifth distillate oil and at least residual part of the fourth distillate oil, and delay-coking the tower bottom residual oil. The method provided by the invention can produce clean and high-quality gasoline, kerosene and diesel oil products in accordance with the environment-friendly requirement, and meanwhile makes full use of the properties of the crude oil to produce high value-added products so as to realize maximization of economic benefit.

Description

technical field [0001] The invention relates to a treatment method for high-acid crude oil. Background technique [0002] Crude oil is an extremely complex mixture, its main composition is hydrocarbons, and it also contains sulfur, nitrogen, oxygen and other compounds and trace metal organic compounds. Crude oil produced in different oilfields often has different compositions and properties. Even in the same oil field, due to different oil production layers, the properties of crude oil may vary greatly. Represented by Daqing Oilfield, most of the previously developed oilfields in my country belong to low-sulfur waxy crude oil. The processing of crude oil generally adopts techniques such as distillation, thermal processing such as delayed coking, catalytic cracking, catalytic reforming, hydrofinishing and hydrocracking. Crude oil is cut into various fractions such as gasoline, solvent oil, jet fuel, light diesel oil, heavy diesel oil and various vacuum side cut oils by dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/14
Inventor 吴青苑少军张树广夏长平姜涛邵为谠贺胜如张锡泉
Owner CNOOC OIL & PETROCHEMICALS CO LTD