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Method of liquid phase circulation hydrotreatment and reaction system

A liquid-phase circulating hydrogenation and reaction system technology, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment control/regulation, petroleum industry, etc. Effect of wet factor, maintain activity stability, reduce adverse effects

Active Publication Date: 2010-07-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the liquid-phase hydrogenation reaction system disclosed in CN200680018017.3, the amount of mixed hydrogen in the liquid phase is used to control the pressure and liquid level in the reactor. In the case of hydrogen demand, if there are many small molecular hydrocarbons produced under abnormal conditions, the liquid level in the reactor will drop. At this time, the response of the control system is to reduce the amount of mixed hydrogen in the liquid phase raw material. If it is reduced too much, then The amount of hydrogen may not be enough to maintain the normal hydrogenation reaction, which will adversely affect the stability of the reaction

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  • Method of liquid phase circulation hydrotreatment and reaction system
  • Method of liquid phase circulation hydrotreatment and reaction system

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Embodiment 1

[0037] according to figure 1 The operation process is often second-line oil hydrotreating desulfurization, and the catalyst is the FH-UDS catalyst developed and produced by Fushun Petrochemical Research Institute. The chemical hydrogen consumption (0.27wt% for fresh raw materials) and the system theoretical dissolved hydrogen (0.18wt%) of the reaction are tested first, and then the method process of the present invention is carried out. The reaction pressure is 6.4MPa, and the volumetric space velocity of the reaction raw material oil is 6h -1 . The amount of hydrogen mixed in the fixed control oil is 0.19wt% (mixed hydrogen amount / feed amount), and is a constant amount, and the circulation ratio (circulation oil volume: fresh raw material volume) is 2: 1, by controlling the reactor exhaust and The discharge volume is used to control the liquid volume and pressure in the reactor. The reaction result shows that the sulfur content of the refined oil is 5 μg / g, which is basica...

Embodiment 2

[0041] according to figure 2 As shown in the flow chart, two stripping trays are arranged on the upper part of the reactor, and the volume ratio of hydrogen to oil for stripping is 5:1. The mixed diesel feedstock is hydrotreated at 365°C for desulfurization and denitrogenation. The catalyst is FHUDS-2 catalyst developed and produced by Fushun Petrochemical Research Institute. The chemical hydrogen consumption (0.58wt% for fresh raw material) and the system dissolved hydrogen (0.18wt%) of the reaction are tested first, and then the method process of the present invention is carried out. The reaction pressure is 5.5MPa, and the volume space velocity of the reaction raw material oil is 3.2h -1 . The amount of hydrogen mixed is based on the reaction chemical hydrogen consumption plus 0.8 times the amount of dissolved hydrogen in the system, and the circulation ratio (volume of circulating oil: fresh raw material volume) is 4:1, that is, the amount of hydrogen mixed in the fixed...

Embodiment 3

[0045] according to figure 2 As shown in the flow chart, without using Gaofa 6, 3 stripping trays are arranged on the upper part of the reactor, and the volume ratio of hydrogen to oil for stripping is 1:1. Vacuum gas oil VGO was hydrotreated at 380°C to denitrify, and the catalyst was 3996 catalyst developed and produced by Fushun Petrochemical Research Institute. The chemical hydrogen consumption of the reaction and the dissolved hydrogen in the system are tested first, and then the method process of the present invention is carried out. The reaction pressure is 14.7MPa, and the volumetric space velocity of the reaction raw material oil is 1h -1 . The amount of hydrogen is based on the reaction chemical hydrogen consumption plus 3 times the amount of dissolved hydrogen in the system, and the circulation ratio (circulation oil volume: fresh raw material volume) is 3:1, that is, the hydrogen mixing amount in the fixed control oil is 1.72wt% (the hydrogen mixing amount / Fee...

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Abstract

The invention discloses a method of liquid phase circulation hydrotreatment. A part of liquid product after hydrotreatment circulates and is mixed with raw material to form liquid phase material, the hydrogen is mixed in the liquid phase material, the mixing volume of the hydrogen is increased by below 20 times of the dissolved hydrogen volume of a reaction system under the reaction condition based on the chemical hydrogen consumption in the reaction process, the liquid phase material mixed with the hydrogen enters the upper part of a reactor, the upper part of the reactor is provided with a gas phase space and an exhaust system which is communicated with the gas phase space, the pressure and the liquid level in the reactor are controlled by controlling the displacement of the exhaust system, the liquid phase material dissolved with the hydrogen enters a hydrogenation catalyst bed at the lower part of the reactor for hydrotreatment reaction, a part of the liquid phase reaction productis discharged from the reaction system, and the other part circulates and is mixed with the raw material. The method can ensure good reaction effect and leads the liquid phase circulation hydrotreatment to be stably controlled and operated.

Description

technical field [0001] The invention relates to a liquid-phase circulating hydrogenation treatment method and a reaction system, in particular to a liquid-phase hydrogenation treatment method and a reaction system by increasing dissolved hydrogen through liquid-phase product circulation. Background technique [0002] Reducing the content of sulfur and aromatics in diesel can reduce the emission of solid particles in the exhaust of diesel vehicles and reduce air pollution. my country's light diesel oil specifications and standards will soon be implemented with reference to the Euro III standard, which requires the sulfur to be less than 350 μg / g, and the Euro IV standard, which requires the sulfur to be less than 50 μg / g. In order to cope with the production of diesel oil with new emission standards, on the one hand, it is necessary to solve key technical problems, build a hydrogenation unit to carry out deep hydrodesulfurization of diesel oil, increase the cetane number, and...

Claims

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Application Information

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IPC IPC(8): C10G49/00C10G49/26
Inventor 李扬方向晨刘继华徐大海牛世坤杨成敏
Owner CHINA PETROLEUM & CHEM CORP
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