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A processing method and technology for heavy oil, which are applied in the petroleum industry, hydrotreating process, treatment of hydrocarbon oil, etc., can solve the problems of low yield of light oil, poor quality of catalytically cracked gasoline and diesel oil, etc., and improve the yield and quality. , the effect of increasing the added value of the product
Active Publication Date: 2020-04-03
CHINA NAT OFFSHORE OIL CORP +3
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[0005] The purpose of the present invention is to overcome the defects of low light oil yield and poor quality of catalytic cracking gasoline and diesel oil in the heavy oil processing process in the prior art, and provide a heavy oil processing method
Method used
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Embodiment 1
[0045] This example is used to illustrate the heavy oil processing method using PZ as raw material.
[0046] PZ is subjected to vacuum distillation treatment through vacuum distillation device 1 to obtain VGO 1 and VR 1 , VGO 1 with VR 1 The specific properties of are shown in Table 2;
[0047] With isobutane as solvent, 20 parts by weight of VR 1 and 80 parts by weight of isobutane at a temperature of 90°C and a pressure of 4MPa to carry out solvent directional separation treatment through a solvent directional separation device 2 to obtain LDAO 1 、HDAO 1 and DAOs 1 , LDAO 1 、HDAO 1 and DAOs 1 The yield is shown in Table 3, LDAO 1 The properties of are shown in Table 4;
[0048] HDAO 1 and DAOs 1 Under the conditions of temperature 500°C, pressure 0.2MPa, and circulation ratio 0.2, carry out delayed coking treatment through delayed coking unit 3 to obtain dry gas, liquefied gas, gasoline, diesel oil, coker wax oil and petroleum coke;
[0049] 90 parts by weight ...
Embodiment 2
[0053] This example is used to illustrate the heavy oil processing method using PZ as raw material.
[0054] Process heavy oil according to the method of embodiment 1, the difference is that 80 parts by weight of VGO 1 and 20 parts by weight LDAO 1 undergo hydrocracking treatment.
[0055] The product distribution of Example 2 is shown in Table 5.
Embodiment 3
[0057] This example is used to illustrate the heavy oil processing method using PZ as raw material.
[0058] Process heavy oil according to the method of embodiment 1, the difference is that 70 parts by weight of VGO 1 and 30 parts by weight LDAO 1 undergo hydrocracking treatment.
[0059] The product distribution of embodiment 3 is shown in table 5.
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Abstract
The invention relates to the field of petroleum refining and discloses a heavy oil processing method. The method comprises the following steps: (1) performing reduced-pressure distillation treatment on heavy oil to obtain reduced-pressure wax oil and reduced-pressure residual oil; (2) performing solvent directional separation treatment on the reduced-pressure residual oil to obtain light deasphalted oil, heavy deasphalted oil and deoiled asphalt; (3) performing delayed coking treatment on the heavy deasphalted oil and the deoiled asphalt; (4) performing hydrocracking treatment on part of the reduced-pressure wax oil and part of the light deasphalted oil; and (5) performing catalytic cracking treatment on the residual reduced-pressure wax oil, the residual light deasphalted oil, hydrocracking tail oil generated in the hydrocracking treatment process and coking wax oil generated in the delayed coking treatment process. With the method provided by the invention, the yield of light oil can be increased, the quality of the light oil can be improved, and the additional value of products can be increased.
Description
technical field [0001] The invention relates to the field of petroleum refining, in particular to a heavy oil processing method. Background technique [0002] In recent years, due to the continuous increase in the output of heavy crude oil, the high content of residual oil in crude oil and the low content of light oil, and the continuous introduction of some foreign high-sulfur crude oil, the lightening of residual oil has become one of the main issues of petroleum processing in various countries in the world today. Therefore, how to choose a reasonable method to process heavy oil has become an important strategic goal to improve the economic benefits of refineries. [0003] Delayed coking is an important method for vacuum residue processing. Although the investment cost and operating cost are low, and the adaptability to crude oil is strong, the yield of light oil is low, the coke output with low added value is high, and the quality of delayed coking products is relatively ...
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