Hot high-pressure hydrogen gas stripping separation method of solid-containing hydrocarbon hydrogenated products

Abstract

The invention relates to a hot high-pressure hydrogen gas stripping separation method of solid-containing hydrocarbon hydrogenated products. The method is suitable for a separation process of reaction products of coal liquefication, oil-coal corefining, heavy oil suspension bed or fluidized bed hydrogenation, coal tar suspension bed or fluidized bed hydrogenation and the like, is capable of reducing the corrosive component quantity in oil S1L after the hot high-pressure separation and reducing the low-boiling-point component quantity, and can lower the temperature of the oil S1L and increase the viscosity of the oil S1L by utilizing the heat absorption during flash evaporation; and the properties of the hot high-pressure separated gas are changed due to more low-boiling-point hydrocarbon components contained in the gas. The changes of the properties of the hot high-pressure separated oil refer to S1L quantity reduction, corrosivity reduction, heavy component concentration increase and temperature reduction. When being used for separating the coal liquefication reactor products, the method enhances the oil product separation efficiency in the hot high-pressure separation process, reduces the cavitation and erosion speeds of the flow passage components in the oil S1L pressure reduction process, lowers the load and medium corrosivity in the oil S1L fractional distillation process, and enhances the solid removal efficiency.

Description

technical field [0001] The invention relates to a method for hot and high-pressure hydrogen gas stripping and separation of solid-containing hydrocarbon hydrogenation products, which is suitable for coal liquefaction, oil-coal co-refining, heavy oil suspension bed or ebullation bed hydrogenation, coal tar suspension bed or ebullation bed hydrogenation, etc. The separation process of the reaction product can reduce the amount of corrosive components in the oil S1L after thermal high-pressure separation, reduce the amount of low-boiling components, reduce the temperature of the oil S1L by using flash heat absorption, increase the viscosity of the oil S1L, and heat high-separation gas properties The change is that it contains more low-boiling point hydrocarbon components; the change in the properties of thermal high-separation oil is that the amount of oil S1L is reduced, the corrosion is reduced, the concentration of heavy components is increased, and the temperature is reduced. ...

AI Technical Summary

Problems solved by technology

[0014] ④ The unstable flow of the fluid causes the liquid phase to carry solid particles to make it slide over the surface of the flow-passing part without colliding with the flow-passing part. The ability of "liquid phase carrying solid phase" is poor: due to the above three factors, the liquid phase is The stagnant film area and non-stagnant film area formed on the surface of the component change indefinitely, forming two kinds of alternating states. The higher the alternating frequency, the higher the probability that the solid phase will move from the inside of the liquid phase to the surface of the liquid phase. The faster the surface of the flow part is damaged by solid collision, the shorter the life of the flow part;

[0015] ⑤Because the flow-passing parts usually present an asymmetrical special-shaped structure with an unsatisfactory stress structure, under the combined action of the above factors, a certain link in the overall structure of the flow-passing parts has defects in the manufacturing process or damage in the use process, Will rapidly expand into damage to the overall structure;

[0016] ⑥Because the hot high-separation oil DS1L contains a lot of solids, the pressure relief valve should not use a multi-stage pressure relief valve with too long flow path and too many pressure relief stages, which also limits the improvement of the pressure relief valve structure to alleviate cavitation and erosion physical means

[0026] So far, no other similar methods have been reported

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