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Starting method of ethylene tar boiling bed-fixed bed combination process

A technology of ethylene tar and fixed bed, which is applied in tar processing, petroleum industry, hydrotreating process, etc., and can solve problems such as differences in start-up methods, cumbersomeness, and differences in properties between ethylene tar and coal tar

Active Publication Date: 2019-06-21
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In this method, the traditional sulfidation method of residual oil hydrogenation unit is still used in the early stage of sulfidation. After the sulfidation is completed, additional distillate oil and polar substances need to be selected, and at the same time, diluent oil is prepared according to a certain proportion, which is relatively cumbersome when the device is started.
In addition, the properties of ethylene tar and coal tar are different, and their starting methods are also different.

Method used

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  • Starting method of ethylene tar boiling bed-fixed bed combination process

Examples

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Effect test

Embodiment 1

[0064] In Example 1, ethylene tar 1 in Table 1 is used as the raw material, which is a relatively heavy ethylene tar raw material. The start-up method of the present invention is adopted. The properties of the medium ethylene tar raw material are shown in Table 1. The ebullating bed hydrogenation device is equipped with an ebullating bed hydrogenation reactor, and the ebullating bed hydrogenation reactor is filled with FEC catalyst, and the specific properties of the catalyst are shown in Table 2. The fixed-bed hydrogenation device is provided with two fixed-bed hydrogenation reactors, and the two fixed-bed hydrogenation reactors are connected in series, respectively filled with FMJ-2 and FMJ-3 catalysts, and the specific properties of the catalysts are shown in Table 3. The initial vulcanized oil of the fixed-bed hydrogenation reactor is straight-run kerosene, which is directly obtained by distillation of petroleum-based crude oil. The vulcanizing agent is DMDS. The maximum in...

Embodiment 2

[0066] It is basically the same as Example 1, except that the raw material is ethylene tar raw material with relatively good quality, the specific properties are shown in Table 2, and the specific starting operating conditions are different, see Table 5 for specific starting operating conditions.

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Abstract

The invention discloses a starting method of an ethylene tar boiling bed-fixed bed combination process. The starting method comprises that a fixed bed hydrogenation device is vulcanized, and the material obtained in the reaction process of the fixed bed hydrogenation device is used as the vulcanized oil for the starting process of a boiling bed hydrogenation device, such that the vulcanization processes of the two hydrogenation devices are organically combined into the integration to support each other, such that the problem of pipeline blockage in the starting process using the existing vulcanization process can be solved.

Description

technical field [0001] The invention relates to a start-up method of an ethylene tar hydrogenation process, in particular to a start-up method of an ethylene tar combined hydrogenation process. Background technique [0002] Ethylene tar is a high-temperature condensation product of raw materials and products in the steam cracking process of ethylene cracking raw materials. Its main components are aromatic compounds, and it is mainly a mixture of double-ring and condensed-ring aromatic hydrocarbons. The aromatic content is more than 90%, and the side chain is short. High, low ash content, very little heavy metal content, its composition varies with cracking raw materials and cracking conditions, and the output is 15% to 20% of the ethylene output. my country's ethylene pyrolysis tar is mainly used as fuel for boilers or kilns. When it is used as fuel, its combustion performance is not good and its calorific value is low. Judging from the current situation, the comprehensive ...

Claims

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Application Information

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IPC IPC(8): C10G65/08C10C1/00
Inventor 孟兆会陈新杨涛葛海龙蒋立敬
Owner CHINA PETROLEUM & CHEM CORP
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