Production system and method of refined diesel oil

Abstract

The invention provides a production system of refined diesel oil. The production system comprises a fluidized bed reaction kettle and a hydrogen inlet pipeline, the hydrogen inlet pipeline is connected with a first external micro-interface unit and a second external micro-interface unit, the fluidized bed reaction kettle is provided with a raw material inlet and a circulating oil inlet, the raw material inlet is connected with the first external micro-interface unit, and the circulating oil inlet is connected with the second external micro-interface unit; a circulating pipeline is arranged in the fluidized bed reaction kettle, one end of the circulating pipeline is connected with the circulating oil inlet, and the other end of the circulating pipeline is arranged at the tower top of the fluidized bed reaction kettle and is used for conveying circulating oil to the tower top. According to the invention, the reaction pressure, the reaction temperature and the consumption of recycle hydrogen are reduced, the utilization rate of raw materials and hydrogen is improved, the product quality and yield are improved, and the cost is saved.

Description

technical field [0001] The invention relates to the field of diesel hydrogenation, in particular to a system and method for producing refined diesel. Background technique [0002] Diesel is a product obtained by fractional distillation of petroleum. If it is directly obtained from petroleum refining, the content of sulfur, nitrogen and oxygen in diesel oil is relatively high, and the content of olefins is also relatively high. The high content of olefins in the product is prone to discoloration, and it will also affect the service life of motor vehicles, and the degree of air pollution is relatively large. [0003] With the improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, the production and use of clean vehicle fuels has become a development trend, and the development of deep hydrodesulfurization technology for diesel has become a current research focus. At present, the operation process of most diesel ...

AI Technical Summary

Problems solved by technology

At present, the operation process of most diesel oil hydrotreating units is that the raw material oil undergoes heat exchange with refined diesel oil and reaction products, and is heated to the required reaction temperature by a heating furnace before hydrogenation. Although this hydrogenation process is convenient to operate and easy to industrialize, However, the energy consumption is high, the consumption of circulating hydrogen is large, the pressure and temperature of the hydrogenation reactor are high, and the production capacity is relatively low.

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