Hydrocarbon oil processing method capable of simultaneously producing anode coke product and common petroleum coke product

Abstract

The invention relates to the field of hydrocarbon oil processing, and discloses a hydrocarbon oil processing method capable of simultaneously producing an anode coke product and a common petroleum coke product, the method comprises the following steps: vacuum residue is introduced into a first separator for countercurrent contact with a solvent contained in the vacuum residue, and a first tower top material flow and a first tower kettle material flow are respectively obtained; the first tower top material flow is introduced into a second separator to be in countercurrent contact with a solvent contained in the second separator, and a second tower top material flow and a second tower kettle material flow are obtained respectively; hydrotreating is performed on the second tower kettle material flow to obtain a hydrogenated material flow; the hydrogenation material flow is subjected to delayed coking treatment, and an anode coke product is obtained; and the first tower kettle material flow and the second tower top material flow are subjected to solvent removal treatment and then introduced into a coking device, and a petroleum coke product is obtained. According to the invention, efficient utilization of the hydrocarbon oil is achieved, the utilization rate and the utilization value of the hydrocarbon oil are improved to the maximum extent, and the anode coke obtained through production has high quality.

Description

technical field [0001] The invention relates to the field of hydrocarbon oil processing, in particular to a hydrocarbon oil processing method for simultaneously producing anode coke products and ordinary petroleum coke products. Background technique [0002] With the rapid development of the electrolytic aluminum industry, the demand for aluminum prebaked anode coke has risen sharply, and the aluminum prebaked anode coke industry has gradually become a new investment growth point. [0003] Generally speaking, when the sulfur content of petroleum coke is relatively low, the anode consumption decreases with the increase of sulfur content, because sulfur increases the coking rate of asphalt and reduces the porosity of asphalt coking; at the same time, sulfur is also combined with metal impurities, reducing The catalytic effect of metal impurities, but if the sulfur content is too high, the thermal brittleness of the carbon anode will be increased, and because the sulfur is main...

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Problems solved by technology

[0007] However, the anode paste produced by using medium-temperature asphalt as raw material produces relatively large flue gas due to high volatile content during use, which pollutes the environment; when using high-temperature asphalt as raw material , due to the high sulfur content, high metal content and high carbon residue value in high-temperature asphalt, it is easy to generate shot coke during coke formation, and the produced coke emits SOx during use, which affects the environment

[0008] CN1349955A discloses a production method of clean anode coke, which proposes to mix the raw material petroleum coke and medium-temperature pitch evenly, use an electromagnetic separator to remove impurities, grind, Forming, roasting at 1000-1300°C for 12-24 hours, and the mature anode coke is cooled by a cooling tower to obtain a clean anode coke product; while the electromagnetic separator only has the effect of separating free metal impurities, and is effective for metal compounds or sulfur, etc. no separation effect

[0009] At present, there is no suitable process to treat the vacuum residue with poor properties, so that it can be used as a raw material for the production of high-quality anode coke. Hydrogenation of fixed bed residue can remove sulfur and metals in vacuum residue, but considering hydrogenation The construction cost of the device, the hydrogen consumption, and the service life of the catalyst are poor in economy

In addition, the vacuum residue is used as coking feed after hydrogenation, and the saturation of the feed to the coking unit is greatly increased. The volatile carbon-containing substances, stack ratio, and moldability of the anode coke produced are difficult to meet the quality requirements of the anode coke.

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