Method and system for processing coker gasoline and heavy raw material oil by adopting diameter variable riser pipe
A coking gasoline and riser technology, which is applied in hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc., can solve problems such as the impact of gasoline pool octane number in refineries, accelerated cracking catalyst deactivation, and impact on gasoline octane number, etc. , to achieve the effect of solving the shortage of petrochemical raw materials, improving the performance of catalytic cracking reaction, and increasing the yield
Active Publication Date: 2020-03-03
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0009] Among the above methods, the method of hydrofining can reduce its impurity and olefin content, improve stability, and be used as a gasoline blending component, but because of its low octane number, it will still have a great impact on the octane number of the gasoline pool in the refinery
Coked gasoline can be directly sent to the catalytic cracking unit for cracking. The problem is that the high nitrogen content will accelerate the deactivation of the cracking catalyst and affect the product distribution. At the same time, the alkane cracking activity in gasoline is low, and a large amount of unreacted alkane enters the gasoline product. Affect gasoline octane rating
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Embodiment 1
[0102] according to figure 1 The raw material oil is coking gasoline raw material, and the adsorption and separation reaction is carried out on a fixed-bed adsorption-desorption reactor. The n-paraffin adsorbent is 5A molecular sieve. Speed 1.0 hours -1 ; Desorption treatment conditions: the desorption gas is nitrogen, and the weight hourly space velocity of the desorption gas is 150 hours -1 , temperature 360°C. The nitrogen content in the absorbed oil is 350 μg / g, the normal paraffin content in the desorbed oil is 95% by weight, and the nitrogen content is 10 μg / g. The desorbed oil and absorbed oil produced by coking gasoline through adsorption and separation enter the heating furnace and are heated to 420°C.
[0103]The catalytic cracking reaction is carried out on a medium-sized riser reactor. The ratio of the height of the first reaction zone to the second reaction zone is 1:1, and the ratio of the inner diameter of the second reaction zone to the first reaction zone...
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Abstract
The invention relates to a method and a system for processing coker gasoline and heavy raw material oil by adopting a diameter variable riser pipe. The method comprises the following steps: introducing a coker gasoline raw material into an adsorption and desorption reactor, contacting an n-alkane adsorbent, and carrying out an adsorption and separation reaction; carrying out desorption treatment on the adsorbent adsorbing the n-alkane by adopting desorption gas to obtain a desorbed adsorbent and desorbed oil; introducing the desorbed oil and heavy raw material oil into the first reaction zoneof a riser reactor, contacting a catalytic cracking catalyst, and carrying out a first catalytic cracking reaction; and feeding the oil agent obtained in the first reaction zone into a second reactionzone, contacting the adsorbing residual oil, and carrying out a second catalytic cracking reaction. With the application of the method and the system of the invention to process coker gasoline and heavy raw material oil, the yields of propylene and butene are high.
Description
technical field [0001] The invention relates to a method and a system for processing coker gasoline and heavy raw material oil using a variable-diameter riser. Background technique [0002] Propylene and butene are important basic raw materials for the petrochemical industry. Currently, about 62% of propylene comes from the co-production of steam cracking to ethylene. Steam cracking technology has been perfected day by day, and it is a process that consumes a lot of energy, and is limited by the use of high-temperature materials, so the potential for further improvement is very small. [0003] Coking is an important thermal processing process in petroleum refining. The coked gasoline produced during the coking process is a low-quality gasoline rich in olefins and high in impurities such as sulfur, nitrogen compounds and dienes, and has odor, poor stability and octane number. Low-level characteristics, must be secondary processing to improve its performance. [0004] USP56...
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IPC IPC(8): C10G67/02C10G25/08C10G25/03
CPCC10G25/03C10G25/08C10G67/02C10G2300/1037C10G2300/1077C10G2300/202C10G2300/70
Inventor 王迪龚剑洪魏晓丽
Owner CHINA PETROLEUM & CHEM CORP