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Fractionation system and fractionation method of gasoline and diesel hydrogenation device

A technology of a hydrogenation device and a fractionation system, which is applied in the petrochemical field, can solve the problems of shortening the process flow, high energy consumption, and heavy reboiler load.

Pending Publication Date: 2020-07-10
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD +1
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Problems solved by technology

[0004] A comprehensive analysis of the general operation status of the oil refining industry and the technical solutions disclosed in the prior art shows that the naphtha at the top of the fractionation tower of the gasoline and diesel hydrogenation unit can be directly supplied to the reforming unit, which shortens the process flow and reduces energy consumption. The top of the lifting tower still adopts total reflux, and all the naphtha and refined diesel oil are separated by the fractionating tower, and the reboiler at the bottom of the fractionating tower has a large load and high energy consumption

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  • Fractionation system and fractionation method of gasoline and diesel hydrogenation device

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[0047] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0048] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities.

[0049] figure 1 It is a...

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Abstract

The invention provides a fractionation system and a fractionation method of a gasoline and diesel hydrogenation device. The inlet of the system is communicated with the reaction unit of the gasoline and diesel hydrogenation device, the outlet of the system is respectively communicated with a reforming device and a diesel product tank, and the system comprises a stripping tower, a first reflux tank, a first reflux pump, a fractionating tower, a second reflux tank, a second reflux pump, a first heat exchanger, a circulating pump, a reboiler, a booster pump, a steam generator and the like. The fractionation process comprises the following steps: low-fraction oil of the reaction unit enters the stripping tower, bottom oil of the stripping tower enters the fractionating tower, naphtha extractedfrom the top of the stripping tower and naphtha extracted from the top of the fractionating tower are converged and then sent to the reforming device, and diesel oil is extracted from the bottom of the fractionating tower. According to the fractionation system, the operation mode of the stripping tower is changed from total reflux to partial extraction, the reflux quantity of the stripping towercan be reduced by extracting part of naphtha from the top of the stripping tower, and the temperature of the bottom of the stripping tower and the feeding temperature of the fractionating tower are increased so that the treatment load of the fractionating tower is reduced, and finally the aims of saving energy and reducing consumption are fulfilled.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a fractionation system and a fractionation method of a gasoline and diesel hydrogenation device capable of reducing energy consumption. Background technique [0002] The naphtha yield of the gasoline and diesel hydrogenation unit is relatively high, and the low-fraction oil self-reaction part (usually the low-pressure separation tank of the gasoline and diesel hydrogenation unit) enters the stripper, and the stripper adopts total reflux operation, in order to ensure the stripping effect , the reflux flow of the stripping tower is large, the temperature at the top and bottom of the stripping tower is relatively low, the temperature entering the fractionating tower is relatively low, and the load of the reboiler at the bottom of the fractionating tower is relatively large. At the same time, all the naphtha and refined diesel oil enter the fractionation tower, and the naphtha i...

Claims

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Application Information

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IPC IPC(8): C10G67/02B01D3/14B01D3/16B01D3/32
CPCC10G67/02B01D3/14B01D3/322B01D3/16B01D3/143C10G2400/02C10G2400/04
Inventor 崔明海王剑峰庄恒亚阮慧娟
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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