A five-column double-strand feed method for decarburization of a pyrolysis gasoline hydrogenation unit

A decarbonization five-tower, hydrogenation device technology, applied in refining to remove heteroatoms, etc., can solve the problems of insufficient utilization of low-temperature heat, large device load, etc., to facilitate capacity expansion and transformation, reduce emissions, and reduce volatile emissions Effect

Active Publication Date: 2018-01-09
SINOPEC ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the low-temperature heat in the prior art cannot be fully utilized and the device load is large, the present invention provides a five-column double-strand feed method for decarburization of a pyrolysis gasoline hydrogenation device

Method used

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  • A five-column double-strand feed method for decarburization of a pyrolysis gasoline hydrogenation unit
  • A five-column double-strand feed method for decarburization of a pyrolysis gasoline hydrogenation unit
  • A five-column double-strand feed method for decarburization of a pyrolysis gasoline hydrogenation unit

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Embodiment

[0032] like figure 2 As shown, the debutanizer bottom oil 10 in the boundary area of ​​the ethylene unit is directly sent to the butane tower bottom oil cooler 5 before the decarbonization fifth tower in the pyrolysis gasoline hydrogenation unit, and enters the decarburization fifth after controlling the temperature at 100°C. The feed port in the middle of the tower 7 enters the tower; the quenched water tower oil 8 is cooled by the cooler 2, and then enters the tank area 3 for static dehydration, and the dehydrated quenched water tower oil 9 is sent to the pyrolysis gasoline hydrogenation unit, and enters the decarbonization five Before tower 7, heat exchange 6 is performed with high-temperature hydrogenated gasoline 11, and finally enter the tower at the feed inlet in the middle of the stripping section of decarbonization fifth tower 7.

[0033] The pressure at the top of the decarburization fifth tower is 90kpag, and the temperature at the bottom of the tower is 126°C. The...

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Abstract

The invention discloses a five-tower double-strand feeding method for decarburization of a pyrolysis gasoline hydrogenation unit. The middle and lower parts of the five decarburization towers are respectively equipped with feed inlets; the oil of the quenching water tower enters from the lower part of the decarburization tower after being cooled and dehydrated; the bottom oil of the debutanizer enters from the middle feed inlet of the decarbonization five towers. The invention reduces the load of the bottom reboiler of the decarburization five-column tower of the pyrolysis gasoline hydrogenation unit, has a significant energy-saving effect, and is conducive to the expansion and transformation of the plant. In addition, the bottom oil of the debutanizer tower containing more carbon five-light hydrocarbons does not need to enter the tank farm Standing still also reduces the atmospheric environmental pollution caused by the volatilization of light hydrocarbons in the tank area.

Description

technical field [0001] The invention relates to the field of carbon five separation of pyrolysis gasoline, and furthermore, relates to a method for double-strand feeding of decarbonization five towers of a pyrolysis gasoline hydrogenation unit. Background technique [0002] Pyrolysis gasoline is a by-product of steam cracking to produce ethylene. Its composition is C5 to C9 and above fractions, with a dry point of about 205°C. This gasoline is rich in aromatics and can be used as high-octane gasoline or raw materials for aromatics units after hydrogenation . [0003] Pyrolysis gasoline comes from the quenching water tower and debutanizer in the ethylene unit, in which the gasoline fraction at the bottom of the debutanizer is mainly C5 and C6 without water, while the gasoline fraction separated from the quenching water tower is mainly C6+ components, C5 The content is very small and contains water. The above two strands of gasoline are mixed and cooled to room temperature, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/02
Inventor 王鑫泉万涛张炜张文斌叶剑云黄志壮王北星
Owner SINOPEC ENG
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