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Diesel oil ultra-deep desulfurization device and diesel oil hydrogenation reaction system

A technology of hydrogenation reaction and deep desulfurization, which is applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of difficulty in realizing deep desulfurization or ultra-deep desulfurization of diesel oil, frequent regeneration, and short service life of adsorbents. Achieve the effect of accelerating the hydrogenation reaction rate and reaction efficiency, increasing the driving force for mass transfer, and avoiding insufficient hydrogen

Active Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method adopts the method of adsorption desulfurization to achieve deep desulfurization, but there are many problems in adsorption desulfurization, such as low sulfur capacity of the adsorbent, easy penetration, frequent regeneration, complex regeneration system, and high regeneration energy consumption.
[0007] To sum up, it is difficult to achieve deep desulfurization or ultra-deep desulfurization of diesel oil with the existing liquid-phase hydrogenation process, and in non-hydrodesulfurization methods, such as oxidative desulfurization methods, there are oxidant residues in the oil that affect the oxidation stability of desulfurized oil The extraction desulfurization method introduces new solvents into the system and the recovery rate of oxidative desulfurization oil is low; the adsorption desulfurization has problems such as low adsorption sulfur capacity and short service life of the adsorbent, which make these non-hydrogenation deep desulfurization methods in There are many problems in the actual application process, and it is difficult to realize industrialization

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  • Diesel oil ultra-deep desulfurization device and diesel oil hydrogenation reaction system
  • Diesel oil ultra-deep desulfurization device and diesel oil hydrogenation reaction system
  • Diesel oil ultra-deep desulfurization device and diesel oil hydrogenation reaction system

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Effect test

Embodiment 1

[0051] Attached figure 1 The method, wherein the amount of hydrogen in the hydrogenation reactor is 0.405% of the mass of the raw material oil (the sum of fresh raw material oil and circulating oil), and the reaction conditions of the fixed bed hydrogenation reactor are as follows: the reaction temperature is 310-355 ℃, the reaction pressure is 6.0MPaG, and the liquid hourly volume space velocity is 4.5h -1 . The sulfur content in the feedstock oil after fixed-bed hydroupgrading was 576 μg / g.

[0052] The feedstock oil after fixed-bed hydrotreating enters the deep hydrodesulfurization unit, which includes three “U-shaped” tubular reactors connected in series, in which the membrane tube micro-disperser disperses hydrogen into 50nm hydrogen bubbles, nano The amount of hydrogen injected per micron is 0.128% of the mass of the raw oil ("U-shaped" tubular reactor feed); the reaction conditions in the hydrogenation reaction section are as follows: the reaction temperature is 310-3...

Embodiment 2

[0055] Attached figure 1 The method, wherein the amount of hydrogen in the hydrogenation reactor is 0.389% of the mass of the raw material oil (the sum of fresh raw material oil and circulating oil), and the reaction conditions of the fixed bed hydrogenation reactor are as follows: the reaction temperature is 320-360 ℃, the reaction pressure is 6.0MPaG, and the liquid hourly volume space velocity is 5.0h -1 . The sulfur content in the feedstock oil after fixed-bed hydroupgrading was 355 μg / g.

[0056] The feedstock oil after fixed-bed hydrotreating enters the deep hydrodesulfurization unit, which includes five “U-shaped” tubular reactors connected in series in sequence, in which the membrane tube microdisperser disperses hydrogen into 500nm hydrogen bubbles, and the nano The amount of hydrogen injected per micron is 0.152% of the mass of raw oil ("U-shaped" tubular reactor feed); the reaction conditions in the hydrogenation reaction section are as follows: the reaction tempe...

Embodiment 3

[0059] Attached figure 1 The method, wherein the amount of hydrogen in the hydrogenation reactor is 0.402% of the mass of the raw material oil (the sum of fresh raw material oil and circulating oil), and the reaction conditions of the fixed bed hydrogenation reactor are as follows: the reaction temperature is 320-360 ℃, the reaction pressure is 6.0MPaG, and the liquid hourly volume space velocity is 5.0h -1 . The sulfur content in the feedstock oil after fixed-bed hydroupgrading was 47 μg / g.

[0060] The feedstock oil after fixed-bed hydrotreating enters the deep hydrodesulfurization device, which includes seven "U-shaped" tubular reactors connected in series, in which the membrane tube microdisperser disperses hydrogen into 50nm hydrogen bubbles, and the nano The amount of hydrogen injected per micron is 0.164% of the mass of the feedstock oil (feed to the "U-shaped" tubular reactor); the reaction conditions in the hydrogenation reaction section are as follows: the reaction...

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Abstract

The invention discloses a diesel oil ultra-deep desulfurization device and a diesel oil hydrogenation reaction system. The ultra-deep desulfurization device comprises a plurality of U-shaped tubular reactors connected in series, wherein the adjacent tubular reactors are communicated through arc-shaped pipes, and the tubular reactor is in a U shape and comprises straight pipe sections on the two sides and a horizontal section at the bottom and communicated with the straight pipe sections on the two sides. The diesel oil hydrogenation reaction system comprises a fixed bed hydrogenation reactor and a plurality of U-shaped tubular reactors connected in series. According to the invention, H2S, NH3 and other gases generated in the reaction process can be continuously moved out of the reaction system, the hydrogenation reaction rate is improved, the continuous high efficiency of the hydrogenation reaction process is maintained, and deep hydrodesulfurization and ultra-deep desulfurization arerealized.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and specifically relates to a diesel ultra-deep desulfurization device and a diesel hydrogenation reaction system. Background technique [0002] With the improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, the requirements for sulfur content in diesel are becoming more and more stringent. At present, the more advanced diesel hydrodesulfurization technology adopts the method of liquid-phase hydrogenation. The core of the theoretical basis is the solubility of hydrogen in liquid. High temperature and high pressure are the direct driving force for the solubility and dissolution rate of hydrogen. The higher the temperature / pressure, the The greater the solubility and dissolution rate, the more conducive to the hydrogenation reaction and the long-term operation of the catalyst. Compared with the traditional fixed-bed gas / liquid / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/06C10G45/08
CPCB01J8/06C10G45/08C10G2300/202C10G2300/205C10G2400/04
Inventor 杨秀娜于淼阮宗琳王昊辰金平
Owner CHINA PETROLEUM & CHEM CORP
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