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Composite function single-tower diesel or jet fuel vacuum dehydration process

A technology of jet fuel and process method, which is applied in the field of removing moisture from diesel or jet fuel, can solve problems such as affecting product quality, turbidity and opacity of diesel, and achieve the effects of good oil-water separation, less land occupation, and simple process.

Inactive Publication Date: 2015-12-09
李芝玲 +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If there is no dehydration facility in the follow-up, or the standing time in the diesel tank area is not enough, the diesel oil will be turbid and opaque, which will affect the product quality

Method used

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  • Composite function single-tower diesel or jet fuel vacuum dehydration process

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Embodiment 1

[0028] The feed takes diesel as an example:

[0029] 0.66MPaG, 205°C, 44t / h diesel oil 1 enters the vacuum tower 2, and completes equilibrium flash evaporation at the lower part of the vacuum tower under an absolute pressure of 50KPa. Gasification of water and part of diesel oil, 195°C, 2.9t / h water-containing oil gas 3 is mixed with condensed 40°C, 10.9t / h diesel oil 12, the temperature drops to 98°C and enters the upper part of the vacuum tower 2, and condenses to 40°C, falls into the upper tower kettle A5 of the vacuum tower 2, condensed oil at 40℃, 13.6t / h enters the tower kettle B7 through the coalescing material 6, and then is pumped out by the pump 9 to the outlet pipeline 10 through the pipeline 8, and then divided into Two streams (11, 12): stream 12 is mixed with water-containing oil and gas 3; 40°C, 2.7t stream 11 returns to the lower part of the vacuum tower for secondary flash evaporation.

[0030] The oil-water mixture falling into the upper tower kettle A5 of t...

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Abstract

The invention relates to a process method for removing water frrrom diesel or jet fuel by using a vacuum tower. The vacuum tower is divided into an upper part and a lower part, diesel or jet fuel with temperature between 100 DEG C and 300 DEG C enters the lower part of the vacuum tower, and is subjected to balanced flash evaporation under an absolute pressure of 0KPa to 90KPa; water in an oil product and partial oil product are simultaneously gasified, and then enter the upper part of the vacuum tower to be condensed and subjected to oil-water separation; separated water is discharged out of the tower, separated oil is returned to the bottom-lower part of the vacuum tower, and the separated oil and un-gasified oil become qualified water-containing products and discharged out of the tower. According to the invention, the problem that the diesel or jet fuel contains water is solved, and especially, in a diesel hydrogenation unit and a jet fuel refining device of an oil refinery, by adopting the process method, the problem of unqualified mass caused by water containing is effectively solved. Compared with a reboiler furnace fractionation process adopted in the diesel hydrogenation unit and the jet fuel refining device, the process method remarkably has the characteristics of convenience for implementation, less occupation area, low energy consumption and low investment.

Description

technical field [0001] The invention relates to a process method for removing moisture in diesel oil or jet fuel by using a vacuum tower. The method belongs to the technical field of petroleum refining. Utilizing the inventive process can effectively solve the problem of unqualified quality of diesel and jet fuel products caused by water content. Background technique [0002] If the fractionation process of the diesel hydrogenation unit adopts single-column steam stripping, and then stabilizes the steam stripping process after fractionation, there will be a phenomenon that the diesel water content in the distillation outlet of the unit is relatively high. If there is no dehydration facility in the follow-up, or the standing time in the diesel tank area is not enough, the diesel oil will be turbid and opaque, which will affect the product quality. For such a diesel hydrogenation unit, it is necessary to add a suitable diesel dehydration facility. [0003] Diesel hydrogenat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/04C10G7/06
Inventor 李芝玲张海清章艺李崴
Owner 李芝玲
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