Transformation method for improving economic cycle of hydrogenation device

Abstract

The invention relates to a transformation method for improving the economic cycle of aa hydrogenation device. The method comprises the following steps of adding pretreatment facilities for implementing raw oil desalination, dehydration and solid removal coupling processes; arranging inlet efficient inertial separation distributors and centrifugal jet flash evaporators inside a hot high-pressure separator and a hot low-pressure separator; arranging inlet efficient inertial separation distributors and efficient oil-water separating modules inside a cold high-pressure separator and a cold low-pressure separator; arranging efficient gas-liquid separating modules inside the front liquid separating tank and the rear liquid separating tank of a circulating hydrogen compressor; adding low-molecular oil online desalination and anti-corrosion facilities. The transformation method for improving the economic cycle of the hydrogenation device can effectively reduce the content of corrosive ions inprocesses of raw material pretreatment, reaction and fractionation of the hydrogenation device, avoid the problems of system corrosion, salt deposition and the like which are caused by excessive content of corrosive ions, prolong the safe operation cycle of the hydrogenation device, and meanwhile reduce the hydrogen loss and the system operation energy consumption of the hydrogenation device and improve the economic operation level of the hydrogenation device.

Description

technical field [0001] The patent of the present invention relates to a modification method for improving the economic operation cycle of a hydrogenation unit. The method is mainly to add raw material oil pretreatment facilities, on-line process anticorrosion facilities, and strengthen the mixing or separation internals in the reaction separation process, so as to improve the economical and continuous operation cycle of the device. Background technique [0002] In the hydrogenation process, due to the presence of various corrosive impurities such as sulfur and chlorine in the feed oil, after the accumulation of chloride ions in the system exceeds the standard, low-temperature H2S-HCl-NH3-H2O corrosion is formed; at the same time, the crystallization of salts blocks the tray , air cooling, reflux pumps and pipelines, and the crystallized particles increase the erosion and wear of the equipment, causing corrosion in the air cooling, booster pumps, pipelines and other places in...

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Problems solved by technology

[0004] 1) The size of the equipment is large, and the phenomenon of mist entrainment, liquid entrainment and gas entrainment occurs in some devices;

[0005] 2) The high-pressure and low-pressure separators are used as separation equipment for oil gas and circulating hydrogen. Conventional gravity sedimentation is used for low separation efficiency, and more hydrogen gas is dissolved in oil, which increases the total hydrogen consumption of the device and affects the economic benefits of the device;

[0006] 3) The effect of oil-water separation is not ideal, and there are oil-carrying water and water-carrying oil phenomena in the high-pressure separator and low-pressure separator, which affect the normal production of the device

At present, there is no relevant public patent for the overall transformation method of the hydrogenation process

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