On-line fixed-bed hydrogenation method for high-temperature separated gas and medium hydrocarbon of suspended-bed hydrogenation product of carbon-hydrogen material

Abstract

The invention provides an on-line fixed-bed hydrogenation method for high-temperature separated gas and medium hydrocarbon of a suspended-bed hydrogenation product of a carbon-hydrogen material. According to the invention, high-heat separated gas obtained in the hot high-pressure separation process of a suspended-bed hydrogenation product R10P of heavy oil or coal powder is separated into high-temperature separated gas with a part of high-boiling-point hydrocarbons removed and high-temperature separated oil; high-boiling-point components like a hydrocarbon component with a common boiling pointhigher than a certain boiling point at 350 to 520 DEG C in the high-temperature separated gas can be effectively reduced or completely removed; vacuum-residue-free or wax-oil-free high-temperature separated gas and medium hydrocarbon KF, such as self-produced or foreign wax oil and diesel oil in R10, are modified through an on-line fixed-bed hydrogenation reaction process R70, so the coke generation rate of a hydrogenation catalyst in R70 and the decomposition rate of metal can be significantly reduced, the cycle of operation is prolonged, and the quality of a product is improved; and when the R70 is combined to process a suspended-bed hydrogenation main product namely the diesel oil, and when the highest-boiling-point hydrocarbon in the high-temperature separated gas belongs to a dieseloil component, the generated oil fractionation process of the R70 can be simplified, and energy consumption of diesel oil distillation is greatly reduced.

Description

technical field [0001] The invention relates to an on-line fixed-bed hydrogenation method of a suspended bed hydrogenation product of hydrocarbon material with high temperature and high fraction gas and medium hydrocarbons, and a hot high fraction gas obtained from the thermal high pressure separation process of the suspended bed hydrogenation product R10P of heavy oil and or coal powder. The high-temperature and high-pressure separation process is separated into high-temperature high-separation gas and high-temperature high-separation oil from which at least a part of high-boiling point hydrocarbons have been removed. Hydrocarbon components can be effectively reduced or completely removed, without slag reduction or wax oil, high-temperature and high-separation gas and medium hydrocarbon KF, such as R10 self-produced or external wax oil, diesel, through the online fixed-bed hydrogenation reaction process R70 Modification can significantly reduce the coke formation rate and met...

AI Technical Summary

Problems solved by technology

[0023] ② One of the disadvantages is that the hot high-separation gas XS10-V contains vacuum residue components, the metal content and residual carbon content in the R70 feed are high, and the metal deposition rate and coke formation rate of the R70 hydrogenation catalyst are relatively high , will shorten the operation cycle, increase catalyst consumption, and seriously reduce product quality;

[0024] ③ The second disadvantage is that in the fractionation process of the fixed-bed hydrogenation reaction product R70P, a small amount of high-boiling point components must be separated from a large amount of low-boiling point components to generate a large amount of energy consumption for fractionation, such as in order to separate a small amount of vacuum residue The components must evaporate a large amount of hydrocarbon components such as wax oil and diesel oil. For example, in order to separate a small amount of wax oil components, a large amount of hydrocarbon components such as diesel oil must be evaporated. The oil fractionation process of the reaction product R70P is complex, high energy consumption, and big investment

[0068] ⑤In the process H-OIL-K, there is no mention of the joint processing of foreign distillates such as straight-run diesel, catalyst diesel and coker diesel;

[0098] Method of the present invention has no report

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