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Production method of homogeneous petroleum needle coke

A needle coke and petroleum technology, which is used in the petroleum industry, coke ovens, coking carbonaceous materials, etc., can solve the problems such as the inability to improve the quality uniformity and strength of needle coke, and achieve the effect of improving the anti-wear index.

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cannot improve needle focus mass uniformity and strength

Method used

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  • Production method of homogeneous petroleum needle coke
  • Production method of homogeneous petroleum needle coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 illustrates the effect of delayed coking in producing needle coke by the method provided by the present invention.

[0038] Using the same device and raw materials as in Comparative Example 1, the top pressure of the coking tower is 0.4MPa, and the coking cycle of coking is 32 hours. According to the method provided by the present invention, the coking feed in step (1) is the coking raw material feed, and the coking heating The furnace outlet temperature is 420°C, and the temperature of the material in the coking tower is 410°C. The duration of step (1) is 9.6 hours, which is 30% of the entire coking cycle. Step (2) The coking feed is fresh feed and heavy distillate oil from the fractionation tower, the circulation ratio is 1, the temperature at the outlet of the coking heating furnace is raised to 480° C. at a rate of 8° C. / hour, and then kept at a constant temperature. Step (2 ) lasts for 11.2 hours, which is 35% of the entire coke generation cycle. Step (...

Embodiment 2

[0043] Example 2 illustrates the effect of the method provided by the present invention on the production of needle coke by delayed coking.

[0044] Using the same device and raw materials as in Comparative Example 1, the pressure at the top of the coking tower is 0.4MPa, and the coking cycle of coking is 44 hours. The operation is carried out according to the method provided by the present invention, that is, the coking feed in step (1) is the coking raw material, and the coking heating furnace exits The temperature is 450° C., and the duration of step (1) is 24.6 hours, accounting for 60% of the entire coke generation cycle. Step (2) The coking feed is fresh feed and heavy distillate oil from the fractionation tower, the circulation ratio is 1, the coking heating furnace outlet temperature is raised to 480°C at a heating rate of 3.5°C / hour, and then kept at constant temperature, step (2 ) duration of 8.2 hours, accounting for 20% of the entire coke cycle. Step (3) The cokin...

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Abstract

The invention relates to a production method of a homogeneous petroleum needle coke. The method comprises the steps of: (1) heating the raw material for needle coke production to a relatively low temperature of 400-480DEG C by a heating furnace, then leading the raw material into a coking tower to make the coking raw material form flowable intermediate phase liquid crystals; (2) when the low temperature fresh raw material charging stage is completed, gradually raising the temperature of a heating furnace outlet, and at the same time, charging the coking heating furnace with a fresh raw material and heavy distillate oil from a fractionating tower; and (3) when the materials in the coking tower reach a curing coking temperature, charging the coking heating furnace with the coking intermediate distillate oil generated in step (1), and simultaneously raising the coking heating furnace feed temperature to make the internal temperature of the coking tower reach 460-510DEG C, thus finishing high temperature curing of petroleum coke. The method provided in the invention can make the properties of needle coke at different parts inside the coking tower more uniform.

Description

technical field [0001] The invention relates to a method for producing petroleum coke, more specifically, relates to a method for producing high-quality homogeneous needle coke by using petroleum residue or distillate oil rich in aromatic hydrocarbons in the petroleum processing process. Background of the invention [0002] Due to its high carbon content, low ash and other impurities, petroleum coke is widely used as a reducing agent in metallurgy, silicon smelting and other industries. High-quality petroleum needle coke is one of the important raw materials for the production of ultra-high-power and high-power graphite electrodes, which are mainly used in the electric furnace steelmaking industry. With the rapid development of my country's iron and steel industry, the demand for high-quality petroleum coke is also increasing year by year. [0003] In addition to the insufficient supply of raw materials, the unstable quality of needle coke obtained in the production process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B55/00C10G55/04
Inventor 杨哲龙军申海平范启明刘自宾
Owner CHINA PETROLEUM & CHEM CORP
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