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Energy-saving process with hydrotreatment

A technology of hydrogenation treatment and process, which is applied in refining to remove heteroatoms, etc., can solve the problems of heat exchange and cooling of a large amount of hydrogen, difficulties, etc., and achieve the effects of reducing temperature rise, prolonging service life, and prolonging service life

Inactive Publication Date: 2007-03-07
白跃华 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of the above-mentioned prior art that require a large amount of hydrogen and the difficulty of heat exchange and cooling, the present invention proposes a technical solution that replaces hydrogen with products and adds them between the catalyst beds.

Method used

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Embodiment 1

[0016] 93.2m of top loading in the first reactor 3 The grade is DN-200 hydrorefining catalyst, the second reactor is filled with 68.2m 3 The grade is SDD-800 modified catalyst, 19.2m 3 The grade is DN-200 hydrorefining catalyst. Enter the top of the first reactor with 118T / h diesel raw material (distillation range is 241-381°C), the reaction temperature of the first reactor is 327°C, and the pressure is 8MPa. Add quenched product diesel oil in the middle of the first reactor, the material from the first reactor enters the second reactor, and add quenched product diesel oil at the top of the second reactor at the same time, the reaction temperature of the second reactor is 310 ℃, the pressure is 8MPa, and the quenched product diesel oil is added to the middle part of the second reactor. The diesel yield was 93.11%.

Embodiment 2

[0018] Top loading 124.2m in the first reactor 3 The grade is 3822 hydrorefining catalyst, the second reactor is filled with 55.4m 3 The grade is 3824 cracking catalyst, 118T / h diesel feedstock (distillation range 303-439°C) enters the top of the first reactor, the reaction temperature of the first reactor is 384°C, and the pressure is 7MPa. Add the quenched product diesel oil in the middle of the first reactor, the material from the first reactor enters the second reactor, and add the quenched product diesel oil at the top of the second reactor at the same time, the reaction temperature of the second reactor is 374 °C, the pressure is 7MPa, and the quenched product diesel oil is added to the middle part of the second reactor. The yield of heavy naphtha (65-180°C) is 29.8%, the yield of jet fuel (180-260°C) is 17.6%, the yield of diesel oil (180-330°C) is 40%, and the yield of tail oil (>330°C) was 22%.

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Abstract

An energy saving process of hydro-treatment is carried out by adding cooled hydrogen gas into hydrogenation bed, separating hydrogenation from high-pressure separator, compressing and heat exchanging with materials from reactor. It can save hydrogenation circulation, lower cost, decrease heat exchange and cooling area and fully use of energy.

Description

technical field [0001] The invention relates to a fixed-bed catalytic reaction process, in particular to an energy-saving process for hydrogenation treatment. Background technique [0002] In the prior art, the process of fixed bed catalytic reaction, especially the process of hydrotreating, as shown in Figure 1, in reactors 1 and 2, because the reaction therein is an exothermic reaction, as the reaction proceeds That is, the temperature in the downward direction of the catalyst bed 1 is getting higher and higher. In order to reduce the temperature of the catalyst bed, low-temperature hydrogen is currently added between the two catalyst beds to reduce the temperature of the catalyst bed due to the reaction. The material enters the lower catalyst bed at a lower temperature, but the sensible heat of hydrogen is small, and a larger amount of hydrogen needs to be added to achieve the desired effect. In addition, the hydrogen from the reactor needs to be exchanged and cooled by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/04
Inventor 白跃华何卫国王延吉
Owner 白跃华