Diesel oil hydrogenation refining fractionation method and device

A technology of hydrorefining and fractionation device, which is applied in gasoline stabilization, electricity/magnetic dehydration/demulsification, etc., can solve the problems of increased investment, complicated furnace operation and high operating energy consumption, and achieves investment saving and low operating energy consumption. , the effect of high safety

Active Publication Date: 2007-09-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its products do not contain water and have stable quality, but the problem is that the use of reboiler will increase the investment of the device, and the energy consumption is also high, and the operation of the furnace is also complicated

Method used

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  • Diesel oil hydrogenation refining fractionation method and device
  • Diesel oil hydrogenation refining fractionation method and device
  • Diesel oil hydrogenation refining fractionation method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0043] As shown in Figure 1 and Figure 2, a diesel hydrofining and fractionating device includes a steam stripping and fractionating unit for generating oil from hydrogenation reaction. The steam stripping and fractionating unit includes a fractionation tower 3, a tower top cooler 14 and a tower top reflux unit. The side walls of the tank 4 and the fractionation tower 3 are respectively provided with a feed port 1 and a stripping steam inlet 2 for the oil produced by the hydrogenation reaction. The feed port 1 for the oil produced by the hydrogenation reaction is located above the stripping steam inlet 2 for fractionation. The top of the tower 3 and the top cooler 14 are connected by the top oil and gas volatilization pipeline 9, and two pipelines are led out from the top reflux tank 4, namely the reflux pipeline 15 and the gasoline outlet pipeline 15, in which the reflux pipeline 15 and the fractionation The top of the tower 3 is connected, and the gasoline outlet pipeline 15 dir...

Embodiment 2

[0068] Figure 3 shows the second embodiment of the diesel hydrofining and fractionating device of the present invention. The difference from the first embodiment is that the present invention uses two series-connected vertical electric dehydration tanks for dehydration. Of course, it can also Multiple vertical electric dehydration tanks are used for dehydration treatment.

[0069] The method of using the device of this embodiment to perform diesel hydrorefining and fractionating can be divided into a hydrogenation reaction to generate oil vapor stripping and fractionating process and a refined diesel ionization dehydration process. Among them,

[0070] The steam stripping process includes the following steps:

[0071] (1) The hydrogenation reaction product oil from the low-pressure separator of the reaction system enters the feed port of the fractionation tower. The feed temperature of the fractionation tower is 250°C, the top temperature of the fractionation tower is 150°C, and t...

Embodiment 3

[0077] The difference from the first embodiment is that the heat exchange and cooling unit in this embodiment adopts a heat exchanger and an air cooler in series combined structure, that is, the heat exchange and cooling unit 6 adopts one or more heat exchangers in series with the air cooler. , The outlet end of the last heat exchanger is connected to the inlet end of the air cooler, the inlet end of the first heat exchanger is connected to the outlet end of the booster pump 5, and the outlet end of the air cooler is connected to the inlet end of the electric dehydration tank 7 .

[0078] The method of using the device of this embodiment to perform diesel hydrorefining and fractionating can be divided into a hydrogenation reaction to generate oil vapor stripping and fractionating process and a refined diesel ionization dehydration process. Among them,

[0079] The steam stripping process includes the following steps:

[0080] (1) The hydrogenation reaction product oil from the low...

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Abstract

The invention provides a hydrogenation refining fractionation method for diesel oil, which includes a stripping fractional distillation process for reaction generation oil steam and a dewatering process for refined diesel oil. Concrete technical project of the method is: hydrogenation refining reaction generation oil from low pressure separator enters feed inlet of fractionating tower with certain temperature; the fractionating tower employs steam stripping fractional distillation, superheating stripping steam is charged in tower bottom, tower top oil gas enters reflux pot on tower top after cooling, refined diesel oil at tower bottom enters one or more than one series connected vertical ionization dehydration pot after supercharging by pressure pump, heat exchanging and cooling; micro steam condensation water in the refined diesel oil aggregates to larger drip by high-voltage electric field in the ionization dehydration pot, sedimentates at pot bottom and is removed by dehydration pipeline; refined diesel oil without water comes from top of the ionization dehydration pot is the eligible final product. The invention also provides a device for realizing the method.

Description

Technical field [0001] The invention relates to a method for the hydrofining and fractionation of diesel oil. The invention also relates to a device for realizing the method. Background technique [0002] With the continuous improvement of my country's oil quality upgrade requirements, diesel hydrofining equipment is the main way to improve the quality of diesel products. Diesel hydrofining equipment is generally designed with an earlier single-tower process and a two-tower process commonly used at present. The main difference between the two is that the double-tower process has one more desulfurization tower on the basis of the single-tower process than the single-tower process. The hydrogen stripping tower solves the problem of unqualified gasoline corrosion. However, whether it is a single-column process or a double-column process, the fractionation tower generally uses steam stripping fractionation or reboiler for fractionation. The steam stripping and fractionation process i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G7/02C10G33/02
Inventor 卞凤鸣李高原徐柏福黄蔼民李坤杨庆伟
Owner CHINA PETROLEUM & CHEM CORP
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