Flow for separating outflow from hydrogenation reaction

Abstract

The invention relates to a hydrogenation reaction effluent separation process, comprising (1) the hydrogenation reaction effluent enters a hot high-pressure separator, (2) the gas phase separated from the hot high-pressure separator enters a medium-temperature high-pressure separator after cooling down, (3) The gas phase separated by the medium-temperature high-pressure separator cools down and enters the cold high-pressure separator, and the gas phase separated by the cold high-pressure separator is used as circulating hydrogen. (4) A heat exchange tower is installed, and the liquid phase of the hot high-pressure separator enters the heat exchange tower from the lower part. The liquid phase of the high-pressure separator enters the heat exchange tower from the middle, the liquid phase of the cold high-pressure separator enters the heat exchange tower from the top, the liquid phase is drawn out from the bottom of the heat exchange tower for stripping treatment, and the gas phase discharged from the top of the heat exchange tower enters the gas phase after being cooled. Liquid separator for separation. Compared with the prior art, the method of the invention has simple process flow, fewer high-pressure equipment stations, significantly reduced heat exchange area of ​​heat exchange equipment, reduced cooling load and high energy recovery and utilization rate. The method of the invention is applicable to various hydrogenation reaction processes utilizing heat separation.

Description

technical field [0001] The invention relates to a thermal separation process of hydrogenation reaction effluent, that is, a separation method of reaction effluent in hydrogenation process using heat separation, especially a separation method of reaction effluent in hydrocracking process. Background technique [0002] The quality of crude oil in the world is getting worse and worse, and the properties of products obtained from crude oil processing are also getting worse; and with the increasingly stringent environmental protection regulations, the quality requirements for various petroleum products are gradually increasing. Hydrogenation process is an important processing method to provide high-quality petroleum products, so it has been highly valued, the application range is more and more extensive, and the processing capacity is increasing year by year. According to the different properties of raw materials and product requirements, different types of hydrogenation processe...

AI Technical Summary

Problems solved by technology

The disadvantage of this separation process is that energy recovery and utilization are low

[0008] CN98112925.0, CN98112915.3, CN02114456.7, etc. disclose the separation method of hydrocarbon hydroconversion or hydrotreating process to generate oil, by using multiple gas-liquid separators, the liquid hydrocarbons in the separation system can be further absorbed and separated gaseous hydrocarbons in the system, increasing C 3 + Hydrocarbon recovery, but the separation system is complex and does not involve heat recovery

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