Combined coal tar whole fraction hydroprocessing system and application thereof

A technology for hydrotreating and coal tar, applied in the field of coal tar whole fraction treatment process, can solve the problems of loss of effect, inability to achieve deep desalination, dehydration, slag removal, acid catalyst poisoning damage, etc.

Inactive Publication Date: 2015-08-26
袁继海 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] CN1351130A firstly fractionates the coal tar, and carries out hydrogenation upgrading on the light fraction, but its main disadvantage is that the raw materials are not fully utilized
The existing device process is relatively simple, unable to achieve the purpose of deep desalination, dehydration, and slag removal
[0018] 2. Hydrogenation process: The hydrogenation process of the existing equipment adopts a two-stage fixed-bed series reaction process. The first-stage hydrofinishing and the second-stage hydrocracking all use downflow fixed-bed reactors. There is no A separator is installed so that the process is shortened, but the water and alkaline ammonia nitrogen produced in the first stage of hydrogenation will cause fatal poisoning damage to the acidic catalyst in the second stage reactor, and the effect of the second stage of hydroisomerization depreciation will lose its effect. Therefore, the cetane number of existing diesel oil can only be maintained below 40

Method used

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  • Combined coal tar whole fraction hydroprocessing system and application thereof
  • Combined coal tar whole fraction hydroprocessing system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Device

[0092] The desalination, dehydration, and impurity removal refining system 1 is connected to the hydrogen compressor 11 and the upflow moving bed hydrofining reactor 3 respectively through the hydrogenation feed pump 12, and the latter is connected to the catalyst online feeding system 2, two fixed bed reactors connected in series The hydrogen refining reactors 4 are connected respectively, and the fixed bed hydrotreating reactor 4 is connected with the separator 5, and the separator 5 is connected with the hydrogen refining system 10 and the flash tower 6 respectively, and the flash tower 6 is connected with the hydrogenation feed pump 12 and The fixed-bed hydrocracking reactor 7 is connected, and then connected with the fixed-bed hydrotreating reactor 8, the separator 5, and the fractionation tower 9 in sequence, wherein:

[0093] The new hydrogen is connected to the pipeline connecting the hydrogenation feed pump 12 and 3 through the hydrogen refi...

Embodiment 2

[0096] The upflow moving bed hydrofinishing reactor, fixed bed hydrocracking and fixed bed hydrofinishing combination process of the present invention can produce high-quality naphtha and diesel components, and other performance indexes all meet national standards.

[0097] Its principle process flow diagram ( figure 1 ):

[0098] 1. Desalination, dehydration, and impurity removal treatment: Add diluent aromatic solvent oil and demulsifier alkylene oxide to the whole fraction of coal tar, and then go through desalination, dehydration, and impurity removal refining system 1. The refined coal tar salt content is less than 5mg / L. The water content is less than 4%.

[0099] The amount of diluent to be added is based on the viscosity of coal tar, and the viscosity of coal tar is controlled at 20mm.s -2 (100 DEG C), the diluent used in this embodiment adopts the mixed xylene produced by the petrochemical factory as the diluent, the content of aromatics is more than 90%, and the a...

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Abstract

The invention relates to a combined coal tar whole fraction hydroprocessing system and an application thereof. The system comprises a desalination dehydration impurity-removing refining system 1 which is connected with a hydrogen compressor 11 and an up-flow moving bed hydrofining reactor 3 respectively through one hydrogenation feeding pump 12, the up-flow moving bed hydrofining reactor 3 is respectively connected with a catalyzer on-line feeding system 2 and two series connection fixed bed hydrofining reactors 4, the fixed bed hydrofining reactors 4 are connected with separators 5, the separators 5 are respectively connected with a hydrogen refining system 10 and a flash tower 6, the flash tower 6 is connected with a fixed bed hydrocracking reactor 7 through the other hydrogenation feeding pump 12 and then sequentially connected with a fixed bed hydrofining reactor 8, the separators 5 and a fractionating tower 9. Compared with combined coal tar whole fraction hydroprocessing systems in the prior art, the combined coal tar whole fraction hydroprocessing system has the advantages that the process is simpler, the conversion rate is higher, operation is stable, product properties are good, and the system can be used for production processes of excellent light fuels by poor raw materials such as various coal tar, shale oil and residual oil.

Description

technical field [0001] The invention relates to a process for treating the whole fraction of coal tar, especially the whole fraction of coal tar is used as a raw material, and it is also suitable for the processing of inferior raw materials such as coal tar, shale oil, residue oil, etc., and is produced by a combined hydrogenation treatment process Methods and systems for cleaning light fuels. Background technique [0002] Coal tar is one of the liquid products obtained during the dry distillation and gasification of coal. It is an extremely complex mixture that is mainly used to produce benzene, toluene, xylene, and naphthalene, anthracene, acenaphthene, and pyrene by means of separation. And other chemical products and asphalt products. [0003] Due to the sharp rise in crude oil prices in the international market, the market demand for light petroleum products is large, and the price rises accordingly. Therefore, the production of light fuel oil products from coal tar is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 胡平龚腾勇袁继海
Owner 袁继海
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