Refined diesel oil heat utilization system based on diesel oil hydrogenation device

Abstract

The invention relates to the technical field of diesel oil refining, in particular to a refined diesel oil heat utilization system based on a diesel oil hydrogenation device. The refined diesel oil heat utilization system comprises an air cooler, a fractionating tower, a heating tower and a hot high-pressure separator, an input end of the air cooler is connected with a desalting mechanism through a guide pipe, the desalting mechanism comprises a double-layer barrel body, a first feeding pipe and a liquid inlet pipe, the double-layer barrel body is of a double-layer structure, an inner cavity of the double-layer barrel body is communicated with the air cooler through a guide pipe, the first feeding pipe and the liquid inlet pipe are fixed to the two sides of the double-layer barrel body respectively, the first feeding pipe is communicated with the inner cavity of the double-layer barrel body, the liquid inlet pipe is communicated with an outer cavity of the double-layer barrel body, and a flow guide pipe and an isolation cover are arranged in the inner cavity of the double-layer barrel body. An ammonium salt purification mechanism is arranged, so that pipeline blockage is effectively avoided, the stability of the heat utilization system is guaranteed, and meanwhile, a staggered heat exchange mechanism is adopted, so that heat conversion is more flexible.

Description

technical field [0001] The invention relates to the technical field of diesel refining, in particular to a refined diesel heat utilization system based on a diesel hydrogenation device. Background technique [0002] Diesel hydrofining needs to be carried out at a certain temperature. Depending on the crude oil, the heat required for the reaction is different, basically between 220°C and 330°C. The product after the reaction is in a high-temperature gas state, which needs to be dehydrated and cooled to be finally refined. For diesel, the heat utilization system is to recycle the heat on the product after the reaction. [0003] The Chinese utility model patent with the publication number CN213295261U discloses a refined diesel heat utilization system based on a diesel hydrogenation unit. The refined diesel heat exchange system of the diesel hydrogenation unit includes a first heat exchanger, a steam generator and a heat exchanger assembly , there is a cut-off valve in the pip...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a refined diesel heat utilization system based on a diesel hydrogenation device to solve the problem that the crystallization of ammonium salts proposed in the above-mentioned background technology can easily cause pipeline blockage in the cooler or air cooler, resulting in the paralysis of the entire heat utilization system.

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