Method for separating reformed oil

Abstract

The invention relates to equipment and a method for separating reformed oil. The method comprises the following steps of: separating three components, namely C5, C6-C7 and C8<+> in the reformed oil by using a bulkhead rectification column; adding the reformed oil prepared in a reforming device from a rectifying section of a feeding part and the middle part of a stripping section of the feeding part into the bulkhead rectification column; cooling the C5 component on the top of the column by using a condenser, and adding the cooled C5 component into a reflux tank, wherein a liquid phase at the bottom of the reflux tank is partially used as a C5 component product, and the rest liquid phase is used as back flow and flows back to a shared rectifying section on the upper part of the bulkhead rectification column; performing gas-phase side-line extraction on the C6-C7 component from a rectifying section of an extraction part of a side line product and the middle plate of a stripping section on the extraction part of the side line product; and performing condensation cooling and then feeding to an aromatics extraction device, wherein the C8<+> component is arranged at the bottom of the column. The feeding pressure is 0.5MPa (g), the operation pressure of the bulkhead rectification column is 0.4MPa (g), the energy consumption is low, the purity of the C6-C7 component can reach 99.7 percent, floor space is reduced by 40 percent, and the total investment on the equipment is saved by 20 percent.

Description

technical field [0001] The present invention relates to a kind of equipment and method for separating and reforming the generated oil, which adopts a dividing wall rectification tower to separate the reforming and generating oil, and separates the reforming and generating oil into C in a single dividing wall rectifying tower 5 、C 6 -C 7 and C 8 + three components. Background technique [0002] Catalytic reforming unit is one of the important units in the refinery. The reformed oil produced by it is rich in aromatics, has the characteristics of high octane number, low olefin content, and basically no sulfur. It can be directly used as high-octane gasoline for vehicles. It can also be used in the production of aromatic products such as benzene, toluene and xylene. The reformed oil is mainly composed of C 5 + Distillate gasoline contains more than 40 monomeric hydrocarbon components. When producing high-purity benzene, toluene and xylene (referred to as B, T, X) products...

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Problems solved by technology

There is no report at home and abroad to separate the reformed oil with a dividing wall column

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