Fischer-Tropsch synthesized oil process system

Abstract

The invention relates to a Fischer-Tropsch synthesized oil process system, comprising a raw synthetic gas preheater, a slurry-bed F-T (Fischer-Tropsch) synthetic reactor, and a circulating pneumatic compressor; an outlet of the raw synthetic gas preheater is communicated with a bottom inlet of the slurry-bed F-T synthetic reactor, a heat exchanger tube set is arranged in the slurry-bed F-T synthetic reactor, an inlet of the heat exchanger tube se is communicated with an outlet of the circulating pneumatic compressor, and an outlet of the heat exchanger tube is communicated with an inlet of the raw synthetic gas preheater. As the heat exchange tube set is arranged at the top of the slurry-bed F-T synthetic reactor and outlet temperature of reaction tail gas is decreased via circulating tail gas heating, heat utilization rate of the system is increased, high hydrocarbon condensate in reaction tail gas can be increased, reaction tail gas may entrap fewer product drops, the yield of high-added-value finished paraffin is increased, condensation of high hydrocarbons in the reaction tail gas can also be promoted, the ability to trap the fine powder catalyst, the fine powder catalyst is retained in the slurry-bed F-T synthetic reactor, and utilization rate of a fine powder catalyst is increased.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthetic oil process system. Background technique [0002] Since the beginning of this century, coal and natural gas will gradually replace oil and occupy a dominant position in the energy structure. In order to adapt to the inevitable trend of changing the route of energy and chemical raw materials, alleviate the increasingly tense contradiction between the supply and demand of diesel and gasoline, and research and develop alternative liquid fuel production technologies, it has become the primary mission of petrochemical industry technicians at home and abroad. [0003] Fischer-Tropsch (F-T) synthesis technology is a liquid hydrocarbon synthesis technology invented by F. Fischer and H. Tropsch in the 1930s. It is a very important technology in the production technology of alternative liquid fuels. The core reaction of this technology is the F-T synthesis reaction. There are three types of reactors that have...

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Problems solved by technology

This point has two shortcomings for the slurry bed F-T synthesis reactor. One is that the effect is not good for removing the paraffin droplets smaller than 8 μm and the catalyst particles smaller than 5 μm in the gas phase; The function of the outlet gas temperature will make a considerable part of the C17+ hydrocarbons pass through the demister in the gas phase and enter the cooling process. After cooling down, they will condense and block the pipeline or enter the light oil tank with the light oil, making the C17+ hydrocarbon content in the product light oil as high as 18.0%.

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