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Energy-saving pyrolysis gasoline full-cut hydrogenation method and device

A technology for pyrolysis gasoline and whole distillate, which is applied in the field of hydrogenation and energy saving of pyrolysis gasoline whole distillate, and can solve the problems of energy optimization and insufficient utilization of heat.

Active Publication Date: 2011-11-09
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Through the analysis of the prior art of pyrolysis gasoline full-fraction hydrogenation, the inventor found that there are some high-temperature process streams in the pyrolysis gasoline full-fraction hydrogenation process, the heat of which has not been fully utilized, and there is a possibility of energy optimization

Method used

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  • Energy-saving pyrolysis gasoline full-cut hydrogenation method and device
  • Energy-saving pyrolysis gasoline full-cut hydrogenation method and device
  • Energy-saving pyrolysis gasoline full-cut hydrogenation method and device

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Embodiment

[0108] Below in conjunction with embodiment, further illustrate the present invention.

[0109] Except for the decarburization nine-tower system, the process design conditions adopted in the hydrogenation method of whole fractions of pyrolysis gasoline according to the present invention are basically the same as the existing conventional hydrogenation methods of whole fractions of pyrolysis gasoline, and the process operating conditions of the core equipment are as follows:

[0110] The main process operating conditions are as follows:

[0111] Operating Conditions of C-710 Decarburization Five-column

[0112] Location

Operating temperature / ℃

Operating pressure / MPaG

tower top

50～60

0.1～0.2

tower kettle

125～132

[0113] Operating Conditions of Decarburization Nine Tower C-720

[0114] Location

Operating temperature / ℃

Operating pressure / MPaG

tower top

65～75

-0.06～-0.08

tower ...

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Abstract

The invention relates to an energy-saving pyrolysis gasoline full-cut hydrogenation method and a device thereof. The device provided by the invention comprises: a) a first segment hydrogenation reactor system; b) a Carbon 5 removal tower system; c) a Carbon 9 removal tower system; d) a second segment hydrogenation reactor system; and e) a stabilization tower system. Apart from a Carbon 9 removal tower bottom reboiler disposed in the Carbon 9 removal tower system, a Carbon 9 removal tower intermediate reboiler is also arranged on the upper portion of the Carbon 9 removal tower stripping section, wherein a heating medium of the Carbon 9 removal tower intermediate reboiler is a hydrogenated gasoline product collected from the stabilization tower bottom. With the adoption of the pyrolysis gasoline full-cut hydrogenation method in the invention, the consumption of steam and cooling water in the pyrolysis gasoline full-cut hydrogenation device can be obviously decreased so as to reduce the total energy consumption of the pyrolysis gasoline full-cut hydrogenation device.

Description

[0001] Technical field [0002] The invention relates to the field of hydrogenation of pyrolysis gasoline in petrochemical industry, and furthermore relates to an energy-saving method and device for hydrogenation of whole distillates of pyrolysis gasoline. Background technique [0003] Pyrolysis gasoline, also known as pyrolysis gasoline. Using light hydrocarbons, naphtha, diesel oil and even vacuum wax oil as raw materials, in the process of producing ethylene by high-temperature cracking in the presence of water vapor, liquid by-products containing more than five hydrocarbons are formed, and the dry point after fractional distillation is 205°C The liquid is called pyrolysis gasoline. Because this kind of gasoline is rich in aromatics, it can be used as a high-octane gasoline component or used to extract chemical raw materials such as benzene, toluene, ethylbenzene, and xylene after hydrotreating. [0004] At present, industrial pyrolysis gasoline hydrofining generally uses...

Claims

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Application Information

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IPC IPC(8): C10G67/02C10G67/14
Inventor 王鑫泉陈皓陈晓昀张霁明
Owner CHINA PETROCHEMICAL CORP
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