Combined hydrotreating method

A combined technology of hydroprocessing, which is applied in the fields of hydroprocessing process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems such as the influence of the operation period of the hydroprocessing unit, and achieve the improvement of energy utilization efficiency, hydrodesulfurization, The effect of increasing the operating cycle

Inactive Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, when processing low-quality wax oil feedstock, the operating cycle of the hydrotreating unit is greatly affected

Method used

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Embodiment Construction

[0053] The method of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited thereby. as the picture shows:

[0054] The inferior wax oil raw material from the pipeline 1 is exchanged by the heat exchanger 3 and the heat exchanger 4, mixed with hydrogen, heated by the heating furnace 5, and then enters the hydrotreating reactor 7 through the pipeline 6 in an upflow form for hydrogenation. For the hydrogen treatment reaction, the reaction effluent enters the heat exchanger 4 through the pipeline 8 for heat exchange, and then enters the hot high-pressure separator 10 through the pipeline 9 . After the liquid phase stream at the bottom of the hot high-pressure separator 10 enters the hot low-pressure separator 13 through the pipeline 12 to further separate the dissolved gas 14, its liquid phase stream is extracted from the device through the pipeline 15, and directly used as the feed of the cata...

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Abstract

The invention relates to a combined hydrotreating method. According to the method, a wax oil raw material enters a first hydrogenation reaction zone with an up-flow manner, such that a hydrotreating reaction is carried out; a reaction effluent from the first hydrogenation reaction zone enters a thermal high pressure separator; liquid-phase material flow from the bottom of the thermal high pressure separator is further separated by a thermal low pressure separator, such that dissolved gas is separated, and the material is directly used as a feed for a catalytic cracking device; hydrogen-rich gas and hydrocarbon fraction separated from the top of the thermal high pressure separator are mixed with a fresh diesel raw material; the mixture is subjected to a hydrogenation modification reaction in a second hydrogenation reaction zone; a reaction effluent from the second hydrogenation reaction zone is separated, such that a hydrogen-rich gas is obtained; and the hydrogen-rich gas is compressed, and is circulated back to the first hydrogenation reaction zone and the second hydrogenation reaction zone. With the method provided by the invention, device equipment investment and operation cost can be effectively reduced, and oil refining process economic efficiency can be improved to a maximal extent.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a hydrogenation combined method for producing catalytic raw materials and high-quality diesel oil. Background technique [0002] With the increasing pressure of environmental protection, the whole society has higher and higher requirements on the quality of petroleum refining products, especially vehicle fuel. In addition, there is an obvious trend of poor quality of crude oil resources worldwide, and the overall upward trend of crude oil prices is obvious. High product quality requirements and the increase in crude oil procurement costs have reduced the profit margins of the oil refining industry. To survive and develop, the oil refining industry must fully increase the depth of crude oil processing, increase the yield of target products, and reduce the yield of low-value by-products. [0003] Catalytic cracking feedstock pretreatment is one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 蒋东红胡志海张毓莹任亮龙湘云辛靖
Owner CHINA PETROLEUM & CHEM CORP
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