Feito synthetic oil processing line

Abstract

The invention relates to a processing flow of FT synthetic oil, which comprises hydrogenation, low-temperature oil washing, decarburization and PSA. The invention is characterized in that the synthetic oil is mixed with hydrogen via a filter, and enters a hydrogenated prerefining reactor after heat exchange, then enters a hydrogenated refining reactor after the synthetic oil is heated to 300 to 380 DEG C by a heating furnace; oxygen-containing compounds, unsaturated hydrocarbons and metal impurities in the raw material are extracted; the hydrogenated refined product enters a high thermal separator for separation of oil phase and gas phase after heat exchange, and enters a hydrocracking reactor for hydrocracking after heat exchange and heating of the heating furnace; the cracked product and the refined product are mixed to enter a fractionation system; a combined flow with two stages connected in series is adopted for the hydrogenated refining reactor and the hydrocracking reactor which share a recycle hydrogen system; a fractionation system is shared by the hydrogenated refined oil and the hydrocracked oil; and a three-column process flow is adopted for the fractionation system. The invention has the advantages of low gas consumption of the low-temperature oil washing process, high recovery of light hydrocarbons, less matching investment, and reduction of energy consumption and improvement of hydrogen recovery rate due to the decarburization process.

Description

Technical field: [0001] The invention relates to the technical field of chemical industry, specifically a Fischer-Tropsch synthetic oil processing flow, namely indirect liquefied coal-based synthetic oil hydrogenation, low-temperature oil washing, decarburization and PSA process flow. Background technique: [0002] The coal-based synthetic oil technology with independent intellectual property rights is supported by the National 863 Program, the Chinese Academy of Sciences and other government departments, and a number of enterprises including the project owner. The indirect coal liquefaction process technology, including the core synthesis technology and the complete set of technology, which has been developed for 8 years, has passed the verification of the pilot test and has the technical conditions to enter the first phase of industrialization project construction. [0003] Indirect liquefied coal-based synthetic oil hydrogenation, low-temperature oil washing, decarbonizat...

AI Technical Summary

Problems solved by technology

For example, the iron content in the light distillate oil from the synthesis reaction is high, and after hydrogenation reaction, free iron is generated, which quickly blocks the reactor; light distillate oil and heavy distillate oil contain naphthenic acids such as formic acid and acetic acid, which are harmful to equipment Severe corrosion, heavy wax is easy to solidify, etc.

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