Device and method for multi-working-condition operation of C9 removing tower of pyrolysis gasoline hydrogenation device

A technology of decarbonization nine-tower and hydrogenation unit, which is applied in the field of pyrolysis gasoline hydrogenation, and can solve the problems of short maintenance period and shutdown maintenance of styrene extraction unit

Active Publication Date: 2021-09-07
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]Because styrene is easy to polymerize, the maintenance cycle of the styrene extraction unit is short, and it needs to be shut down for maintenance once every two years

Method used

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  • Device and method for multi-working-condition operation of C9 removing tower of pyrolysis gasoline hydrogenation device
  • Device and method for multi-working-condition operation of C9 removing tower of pyrolysis gasoline hydrogenation device

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Embodiment

[0054] This example is used to illustrate the device and method for the decarburization nine-tower multi-working condition operation of the pyrolysis gasoline hydrogenation device of the present invention.

[0055] Such as figure 1 As shown, the present invention provides a kind of device of decarburization nine-tower multi-working mode operation of pyrolysis gasoline hydrogenation unit, and this device comprises decarburization nine-tower 1, and the middle part of described decarburization nine-tower 1 is provided with the first feed inlet and A second feed port, the first feed port is located above the second feed port;

[0056] The tower top of the decarburization nine tower 1 is provided with a tower top extraction pipeline connected to the hydrogenation reaction system RS, and along the flow direction of the material, a tower top condenser 6, a reflux tank 7 and The tower top pump 8, the reflux tank 7 is connected to the vacuum system VS through the decarburization nine ...

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Abstract

The invention belongs to the technical field of pyrolysis gasoline hydrogenation, and discloses a device and method for the multi-working-condition operation of a C9 removing tower of a pyrolysis gasoline hydrogenation device. The device comprises a C9 removal tower; the tower top of the C9 removal tower is provided with a tower top extraction pipeline connected with a hydrogenation reaction system; a tower top condenser, a reflux tank and a tower top pump are sequentially arranged on the tower top extraction pipeline; a C8 side line extraction pipeline and a side line extraction gas phase balance port are arranged at the middle lower part of the C9 removal tower; a C8 side line extraction quantity control assembly, a mixer, a C8 product tank, a C8 product pump, a C8 product cooler and a discharge valve are sequentially arranged on the C8 side line extraction pipeline; a tower kettle extraction pipeline is arranged at the bottom of the C9 removal tower; a tower kettle pump and a C9 product cooler are sequentially arranged on the tower kettle extraction pipeline; and a reboiler is arranged at the bottom of the C9 removal tower. The device and the method can be suitable for operation under two working conditions, can meet the requirement of product scheme change from the aspect of overall planning, and can save energy to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of pyrolysis gasoline hydrogenation, and in particular relates to a device and method for decarburization nine-tower multi-working condition operation of a pyrolysis gasoline hydrogenation device. Background technique [0002] Pyrolysis gasoline is a by-product of steam cracking to ethylene, and its main composition is C5-C9+ fractions. The crude pyrolysis gasoline from the ethylene unit can be separated and hydrogenated by the pyrolysis gasoline hydrogenation unit to obtain C5-products, C6-C8 hydrogenated gasoline, C9+ products. C5- and C9+ are taken out as products, and C6-C8 center fraction hydrogenated gasoline is sent to the downstream aromatics extraction unit for further separation. In recent years, with the increasing demand for styrene, the added value of styrene in crude pyrolysis gasoline is getting higher and higher. Many factories will build supporting styrene extraction devices to extract styr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02
Inventor 利梅王文平聂毅强陈建娟孙希瑾张爱华
Owner SINOPEC ENG
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