A process for producing low-sulfur marine fuel oil by external circulation wax oil fixed-bed hydrotreating

Abstract

A process for producing low-sulfur marine fuel oil by external circulation fixed-bed hydrotreating of wax oil. New hydrogen and circulating hydrogen are mixed and heated. After heating, they are divided into two parts. The first part is mixed with heated wax oil in a first-stage high-efficiency gas-liquid mixture Mix in the distributor, enter the fixed bed primary catalyst bed, the product enters the fixed bed secondary catalyst bed, the second part and the liquid phase product at the bottom of the primary high pressure separator are mixed in the secondary high-efficiency gas-liquid mixing distributor and enter Fixed bed secondary catalyst bed, the bottom product of the reactor enters the primary high-pressure separator, the gas phase product at the top of the primary high-pressure separator enters the secondary high-pressure separator, and the liquid phase product at the bottom of the primary high-pressure separator returns to the catalyst bed, and the remaining Part of it is discharged as fuel oil product 1; the gas phase product at the top of the secondary high-pressure separator is partially returned as circulating hydrogen, and the bottom product of the secondary high-pressure separator is mixed with fuel oil product 1 and discharged as fuel oil product 2. The present invention reduces the operating severity and operating costs.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a process for producing low-sulfur marine fuel oil through hydrogenation treatment of an external circulation type wax oil fixed bed. Background technique [0002] At present, the fixed bed hydrogenation technology has high operating severity and high operating cost, and the economical efficiency of producing marine fuel oil is poor, which makes the low-severity, low-cost production of low-sulfur clean marine fuel oil production technology blank. [0003] In view of this, it is necessary to propose improvement measures for the existing hydrogenation technology to produce marine fuel oil, reduce the operating severity of the device, and improve economic benefits. Contents of the invention [0004] In order to overcome the shortcomings of the prior art, the object of the present invention is to provide a process for producing low-sulfur marine fuel oil through ...

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Problems solved by technology

[0002] At present, the fixed bed hydrogenation technology has high operating severity and high operating cost, and the economical efficiency of producing marine fuel oil is poor, which makes the low-severity, low-cost production of low-sulfur clean marine fuel oil production technology blank.

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