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Method for removing free oxygen from inferior hydrogenated feedstock oil

A raw material oil, free oxygen technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problem that the coal tar hydrotreating process cannot be applied, the operation of coal tar hydrotreating unit is affected, and the normal distillation unit is affected. Operation and other problems, to achieve the effect of extended operation cycle, less investment, simple and convenient operation

Active Publication Date: 2011-02-23
安徽摩力孚再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot be applied to the coal tar hydro-upgrading process of the whole distillate, wasting precious coal tar resources
And because the distillation temperature is too high, usually around 300-360°C, it not only consumes a lot of energy, but also easily causes the coal tar to coke in the distillation system, which affects the normal operation of the distillation unit and thus affects the operation of the entire coal tar hydrogenation unit
[0007] In addition, there are pretreatment methods such as electric desalination, extraction and sedimentation to delay the coking of inferior hydrogenation raw material oil in the hydrogenation process, but they cannot remove free oxygen in inferior hydrogenation raw material oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Coal tar is heated to 120°C, pumped into the degassing tower, and then hydrogen is introduced from the lower part of the degassing tower. The volume flow ratio of hydrogen and coal tar is 150:1, and the tower top gas is condensed to recover light oil and gas Then it enters the venting system, and the light oil flows back to the degassing tower; the coal tar flowing out from the lower part of the tower can be used as the feed of the hydrogenation unit. The hydrogenation process has two stages of pre-hydrogenation and main hydrogenation. Table 1 shows the effect of coal tar hydrogenation feed gas advanced.

[0026] Table 1 The effect of coal tar hydrogenation feed gas advanced

[0027] Coal tar hydrogenation feed

[0028] It can be seen from Table 1 that after the coal tar hydrogenation feed is stripped, the operating time of the device is greatly extended.

Embodiment 2

[0030] The coked gasoline is heated to 40°C, pumped into the degassing tower, and nitrogen gas is introduced from the lower part of the degassing tower. The volume flow ratio of nitrogen and coked gasoline is 10:1, and the tower top gas is condensed to recover light oil and gas Then it enters the venting system, and the light oil flows back to the degassing tower; the coker gasoline flowing out from the lower part of the tower can be used as the feed of the hydrogenation unit. The hydrogenation process has two stages of pre-hydrogenation and main hydrogenation. Table 2 shows the effect of coking gasoline hydrogenation feed gas advanced.

[0031] Table 2 Effect of advance feed gas for hydrogenation of coker gasoline

[0032] Coking gasoline hydrogenation feed

[0033] It can be seen from Table 2 that after the coal tar hydrogenation feed is stripped, the operating time of the device is greatly extended.

Embodiment 3

[0035] Crude benzene is heated to 70°C, pumped into the degassing tower, and then the tail gas of the crude benzene hydrotreating unit is fed from the lower part of the degassing tower. The light oil is recovered through condensation, the gas enters the venting system, and the light oil flows back to the degassing tower; the crude benzene flowing out from the lower part of the tower can be used as the feed for the hydrogenation unit. The hydrogenation process has two stages of pre-hydrogenation and main hydrogenation. See Table 3 for the effect of advancing feed gas for hydrogenation of crude benzene.

[0036] Table 3 Effect of crude benzene hydrogenation feed gas advanced

[0037] Crude benzene hydrogenation feed

[0038] It can be seen from Table 3 that after the coal tar hydrogenation feed is stripped, the operating time of the device is greatly extended.

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PUM

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Abstract

The invention discloses a method for removing free oxygen from inferior hydrogenated feedstock oil. The method comprises the following steps of: heating the inferior hydrogenated feedstock oil, delivering to a degassing tower, continuously introducing gas from a lower part of the degassing tower and performing gas stripping, recycling light oil by condensing steam on the top of the tower, reflowing the light oil to the degassing tower, and allowing the gas to enter a venting system, wherein the inferior hydrogenated feedstock oil in the degassing tower serves as a hydrogenation device feedstock. The method of the invention is simple and easy, the cost is low, the running period of the hydrogenation device is obviously extended, and the method is suitable for the full-fraction inferior hydrogenated feedstock oil hydrogenation process, particularly suitable for the inferior hydrogenated feedstock oil hydrogenation process with high-concentration free oxygen.

Description

technical field [0001] The invention relates to the deep processing of inferior hydrogenated feedstock oil, in particular to a method for removing free oxygen from inferior hydrogenated feedstock oil. Background technique [0002] With the rapid development of economy, my country's demand for energy is increasing day by day. At present, my country's dependence on oil imports has exceeded 50%, far exceeding the internationally recognized safety warning line of 30% dependence on oil imports. Therefore, based on my country's energy status, giving full play to the advantages of abundant and cheap low-quality raw material oil resources, converting them into clean fuel oil through hydrogenation and upgrading, supplementing the shortage of domestic oil and gas resources, has realistic and long-term implications for ensuring the security of the national energy strategy. strategic significance. [0003] However, low-quality raw oil is prone to coking during the hydro-upgrading proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/02C10G67/14
Inventor 李庆华佘喜春朱方明刘呈立郭朝晖
Owner 安徽摩力孚再生资源有限公司