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Dalayed coking method of ungraded materials

A delayed coking method and technology for raw materials, which are applied in the field of delayed coking of inferior raw materials to achieve the effects of reducing energy consumption, increasing energy consumption and prolonging operation period

Inactive Publication Date: 2006-11-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

There is no patent report on the related work patents of using coking equipment to process particularly poor-quality residual oil or even asphalt

Method used

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  • Dalayed coking method of ungraded materials

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Embodiment

[0024] This embodiment is carried out according to the flow process of the accompanying drawings, the inferior raw material is the same as that of Comparative Example 1, the first time period, the second time period, and the third time period of the coking cycle are 1 hour, 16 hours, and 7 hours respectively, and the three time periods Coking raw materials are respectively coking gas oil, inferior crude oil and coking gas oil. The operating conditions, operating cycle, energy consumption and product distribution are shown in Table 2. It can be seen from Table 2 that the operation period is 330 days and the energy consumption is 989.2MJ / t raw material. Compared with Comparative Example 1, the energy consumption of the embodiment is equivalent, but the operating cycle is increased by 240 days; compared with Comparative Example 2, the operating cycle of the embodiment is the same, but the energy consumption is reduced by 27%.

[0025] raw material name

[0026] ...

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Abstract

The delayed coking process for inferior material has coking period divided into three time stages, including the first time stage of heating the fraction oil in the heating furnace to 200-490 deg.c and feeding into coke tower; the second time stage of heating inferior material in the heating furnace to 200-490 deg.c and feeding into coke tower; and the third time stage of heating the fraction oil in the heating furnace to 490-530 deg.c and feeding into coke tower. Coke produced through reaction is left inside the coke tower while the produced coking oil is fed to fractionating tower for further separation to obtain coking gas, coking gasoline, coking diesel oil and coking gas oil. After one coking period is finished, the next period will be performed in one altered tower to repeat the said process. Compared with conventional process, the delayed coking process of the present invention has prolonged operation period of the heating furnace tube.

Description

technical field [0001] The invention belongs to a non-catalytic thermal cracking process of hydrocarbon oil in the absence of hydrogen, more specifically, a delayed coking method of inferior feedstock. Background technique [0002] Due to the low investment and operating costs, and the ability to convert heavy oil into high-value liquids and petroleum coke and other products, delayed coking is still a heavy oil processing technology that is generally valued by people. In the actual process, people encounter such a technical problem, that is, the quality of coking raw materials is too poor, such as raw materials with asphaltene content of more than 5% or coking raw materials mixed with more than 5% asphalt, such as hard asphalt produced by propane deasphalting equipment. Some delayed coking units face processing difficulties. Although measures such as increasing the circulation ratio can be adopted to adapt to such inferior raw materials, there are reducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/16
Inventor 施昌智申海平王玉章
Owner CHINA PETROLEUM & CHEM CORP