Combined distillate oil hydroprocessing method
A technology for hydrotreating and distillate oil, which is applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of increasing equipment investment and operating costs, high equipment investment and operating costs, and difficulty in effectively removing hydrogen sulfide, etc. problems, to save investment and operating costs, reduce operating costs, and reduce hydrogen consumption
Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
When this method is used for secondary processing of middle distillates, the removal rate of impurities is difficult to meet the standard
In the existing two-phase hydrogenation technology, all self-reaction products are partially recycled as circulating oil. The main disadvantages are that a high-temperature and high-pressure circulating oil system needs to be installed, the equipment investment and operating costs are high, and the sulfide dissolved in the oil phase Hydrogen is difficult to remove effectively, and accumulates in the reaction system, causing serious inhibition to the hydrogenation reaction
Although it can be removed by methods such as steam stripping, because it is in a high-temperature and high-pressure system, it will also increase equipment investment and operating costs.
Method used
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Embodiment 1
[0029] This example is an embodiment of the combined distillate oil hydrotreating method, and the operation flow diagram refers to the attached figure 1 .
[0030] After the raw material 6 of the traditional gas-phase circulating hydrogenation unit is mixed with the circulating hydrogen, it enters the reactor 1 of the traditional gas-phase circulating hydrogenation unit. The gas phase separated from the top of the hot high-pressure separator enters the cold high-pressure separator, and the mixed liquid phase material flowing out of the hot high-pressure separator directly enters the two-phase hydrogenation reactor 4 for reaction in the following feeding method. The gas phase separated by the cold high-pressure separator is used as circulating hydrogen, and the liquid phase 9 separated by the cold high-pressure separator enters the fractionation system. The oil 8 produced by the two-phase hydrogenation reaction is discharged from the top of the two-phase hydrogenation reactor ...
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Abstract
The invention provides a combined distillate oil hydroprocessing method. Middle distillate oil which is difficult to remove impurities is processed by adoption of a traditional middle-high pressure hydrogenation technology. The produced material is fed into a hot high-pressure separator together with two-phase hydrogenation raw materials. Fresh hydrogen is supplemented from the bottom of the hot high-pressure separator. The gas phase separated from the top of the hot high-pressure separator is fed into a cold high-pressure separator. Mixed liquid-phase material flowing out from the hot high-pressure separator directly enters a two-phase hydrogenation reactor to be reacted. The gas phase separated from the cold high-pressure separator is adopted as circulating hydrogen. The liquid phase separated from the cold high-pressure separator is fed into a distillation system. The method organically combines the traditional hydrogenation technology and a two-phase hydrogenation technology, processes different materials according to advantages of each of the technologies, and achieves comprehensive processing effects.
Description
technical field [0001] The invention relates to a method for combined hydrogenation of distillate oil, in particular to a combined method for hydrogenation of different quality distillate oil raw materials. Background technique [0002] As people's awareness of environmental protection continues to increase, environmental protection laws and regulations have stricter requirements on engine exhaust emissions, and various fuel standards require more stringent S and N content. At the same time, due to the continuous increase of crude oil extraction and the continuous decrease of conventional crude oil reserves, the trend of crude oil inferiority is becoming more and more serious. The S, N How to process the middle distillate with high impurity content such as sulfur and nitrogen into products that meet environmental protection requirements is an important problem faced by refineries. [0003] The hydrogenation process is the most cost-effective solution to remove middle distil...
Claims
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IPC IPC(8): C10G65/00
Inventor 王喜彬郭蓉曾榕辉蒋立敬
Owner CHINA PETROLEUM & CHEM CORP