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Diesel oil hydrogenation refining fractionation method and device thereof

A technology of hydrofining and fractionation equipment, which is applied in the direction of gasoline stabilization, electricity/magnetic dehydration/emulsification, etc., which can solve the problems of complex furnace operation, increased investment, and high energy consumption in operation, and achieve low operating energy consumption and investment savings , high safety effect

Active Publication Date: 2009-07-29
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 thereof
  • Diesel oil hydrogenation refining fractionation method and device thereof
  • Diesel oil hydrogenation refining fractionation method and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 Shown, a kind of diesel oil hydrotreating fractionation unit comprises hydrogenation reaction and generates oil vapor stripping fractionation unit, and this steam stripping fractionation unit comprises fractionation tower 3, tower top cooler 14 and tower top reflux tank 4, fractionation tower 3 The side wall of the side wall is respectively provided with the feed port 1 and the stripping steam inlet 2 of the hydrogenation reaction to generate oil, wherein the feed port 1 of the hydrogenation reaction to generate oil is located above the stripping steam inlet 2, the top of the fractionation tower 3 and the stripping steam inlet 2. The tower top coolers 14 are connected through the tower top oil and gas volatilization pipeline 9, and two pipelines are drawn from the tower top reflux tank 4, which are respectively a reflux pipeline 15 and a gasoline outlet pipeline 15, wherein the reflux pipeline 15 is connected to the top of the fractionation ...

Embodiment 2

[0068] image 3 Shown is the second embodiment of the diesel oil hydrotreating fractionation device of the present invention, and embodiment one is different, adopts two series-connected vertical electric dehydration tanks to carry out dehydration treatment in the present invention, certainly also can adopt multiple A vertical electric dehydration tank is used for dehydration treatment.

[0069] Using the device of this embodiment to carry out the method of diesel hydrotreating fractionation, the method can be divided into hydrogenation reaction to generate oil steam stripping fractionation process and refined diesel ionization dehydration process, wherein,

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

[0071] (1) The hydrogenation reaction generated oil from the low-pressure separator of the reaction system enters the feed port of the fractionating tower. The feed temperature of the fractionating tower is 250°C, the fractionating tower top temperature i...

Embodiment 3

[0077] The difference from Embodiment 1 is that the heat exchange cooling unit in this embodiment adopts a series combined structure of heat exchangers and air coolers, that is, the heat exchange cooling unit 6 adopts the method of one or more heat exchangers connected in series with air coolers , the outlet of the last heat exchanger is connected to the inlet of the air cooler, the inlet of the first heat exchanger is connected to the outlet of the booster pump 5, and the outlet of the air cooler is connected to the inlet of the electric dehydration tank 7 .

[0078] Using the device of this embodiment to carry out the method of diesel hydrotreating fractionation, the method can be divided into hydrogenation reaction to generate oil steam stripping fractionation process and refined diesel ionization dehydration process, wherein,

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

[0080] (1) The hydrogenation reaction generated oil from the low-pressure separ...

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Abstract

The invention provides a diesel oil hydrogenation and fractionation method, which comprises a steam stripping and fractionation process of reaction-generated oil and a refined diesel oil dehydration process. The concrete technical scheme of this method is: the hydrorefining reaction generation oil that comes from the low-pressure separator enters the inlet of the fractionation tower with a certain temperature, and the fractionation tower adopts steam stripping and fractionation, and superheated stripping steam is passed into the bottom of the tower, The oil gas at the top of the tower enters the return tank at the top of the tower after being cooled, and the refined diesel oil at the bottom of the tower is boosted by the booster pump and cooled by heat exchange before entering one or more vertical ionization and dehydration tanks connected in series, through the high-voltage electric field in the ionization and dehydration tank The small amount of steam condensed water in the refined diesel oil gathers into larger water droplets, settles to the bottom of the tank and is removed through the dehydration pipeline, and the refined diesel oil without water comes out from the top of the ionization dehydration tank to become a refined diesel product with qualified indicators. The invention also provides a device for realizing the method.

Description

technical field [0001] The present invention relates to a diesel oil hydrotreating fractionation method, and the present invention also relates to a device for realizing the method. Background technique [0002] With the continuous improvement of my country's oil quality upgrading requirements, diesel hydrotreating unit is the main way to improve the quality of diesel products. Diesel hydrotreating units generally have two types of design, the earlier single-tower process and the currently commonly used two-tower process. The difference between the two is that the two-tower process has one more desulfurization tower on the basis of the fractionation tower than the single-tower process. Hydrogen stripping tower, thus solving the problem of unqualified gasoline corrosion. However, whether it is a single-tower process or a double-tower process, the fractionation tower generally adopts steam stripping or reboiler for fractionation. The steam stripping fractionation process is ...

Claims

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Application Information

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Patent Type & Authority Patents(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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