Method for producing needle coke by using optimized ethylene tar-containing raw material
A technology of ethylene tar and needle coke, applied in the treatment of hydrocarbon oil, petroleum industry, hydrotreating process, etc., to achieve the effect of increasing the blending ratio, reducing the degree of unsaturation, and ingeniously designing the process route
Pending Publication Date: 2021-12-07
辽宁宝来生物能源有限公司
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Problems solved by technology
[0011] The present invention aims to provide a needle coke production method for processing ethylene tar raw materials and an optimized production process, so as to solve the problem of producing high-quality needle coke from ethylene tar as raw material in the prior art. Coke gap, eliminate the needle coke mosaic structure problem existing in the production of needle coke from ethylene tar raw materials, and at the same time achieve the green production of ethylene tar optimized treatment
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[0037] In the specific examples of the present invention, a flow chart of an embodiment of utilizing optimized ethylene tar to produce high-quality needle coke is as follows figure 1 shown. The components recycled from the upper line and the most downstream coking tower 110 (aromatics and heavy distillate as circulating oil) are mixed and introduced into the hydrogenation tower 102 . In the hydrogenation tower 102, the temperature is controlled at 400°C, and an active hydrogenation reaction catalyst sieve plate (the active component is Ni, and the carrier is an acidic molecular sieve or zeolite) is installed. Under the action of the catalyst, the aromatic hydrocarbons, bitumen, colloid and other components of ethylene tar in the raw material undergo hydrocracking reaction. At the same time, in order to eliminate the influence of the exothermic heat of the hydrogenation reaction and precisely control the temperature in the reaction process, the hydrogenation tower 102 can be ...
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The invention relates to a method for producing needle coke by using an optimized ethylene tar-containing raw material. The method comprises the following steps: feeding an initial coking raw material into a hydrogenation tower and a condenser, carrying out gas-water separation, distilling to obtain a modified and optimized ethylene tar raw material, and after modification and optimization, feeding the modified and optimized ethylene tar raw material into a coking tower for coking reaction to obtain high-quality needle coke. According to the production process, the means of hydrotreating and co-carbonization with the hydrogenated material are adopted, the reaction of free radicals is stabilized in a hydrogen-rich environment, and the high-quality needle coke product is produced while the mixing proportion of ethylene tar is increased. Besides a hydrogenation process, the raw materials are refined, high-boiling-point substances such as heavy oil components are removed and the unsaturation degree of the raw materials is reduced by means of condensation, separation, distillation and the like, the process route is ingenious in design, and zero-pollution emission and green production are realized.
Description
technical field [0001] The invention relates to the field of coke production, in particular to a method for producing needle coke by optimizing raw materials containing ethylene tar. Background technique [0002] Ethylene tar is a high-temperature condensation product of ethylene cracking raw materials and their products during the steam cracking process. Its initial boiling point is 170-260°C, and its final boiling point is greater than 600°C, generally 600-700°C. It belongs to petroleum heavy oil. quality residual oil range. Ethylene tar is a high-aromatic compound, the total amount of aromatics and colloids is greater than 90%, the density (20°C) is greater than 1.0g / cm3, the content of ash, sulfur and nitrogen is very low, and it basically does not contain trace metals. In my country and other countries, ethylene tar is mostly used as raw material oil or fuel oil for the production of carbon black, and its economic added value is low. [0003] Domestic ethylene tar is ...
Claims
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Login to View More IPC IPC(8): C10G69/06
CPCC10G69/06
Inventor 牛永峰徐仁策徐宝田张阳李朝廷
Owner 辽宁宝来生物能源有限公司