A Refined Diesel Heat Utilization System Based on Diesel Hydrotreating Unit

Abstract

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, which includes an air cooler, a fractionation tower, a heating tower and a thermal high-pressure separator. The input end of the air cooler is connected to a A desalination mechanism, the desalination mechanism includes a double-layer cylinder body, a first feed pipe and a liquid inlet pipe, the double-layer cylinder body is a double-layer structure, and the inner chamber of the double-layer cylinder body communicates with the air cooler through a conduit, the The first feeding pipe and the liquid inlet pipe are respectively fixed on both sides of the double-layer cylinder body, the first feed pipe communicates with the inner cavity of the double-layer cylinder body, and the liquid inlet pipe communicates with the outer cavity of the double-layer cylinder body In communication, the inner cavity of the double-layer barrel is provided with a guide tube and an isolation cover. The present invention has an ammonium salt purification mechanism, which effectively avoids pipeline blockage and ensures the stability of the heat utilization system, and adopts a staggered heat exchange mechanism to make heat conversion 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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