A process for producing hydrocarbons by utilizing liquefied gas

Abstract

The invention discloses a device for processing hydrocarbons by using liquefied gas, including a cracking reaction system, an absorption stabilization system, an aromatization reaction system, a gas separation raw material gas concentration system, and an aromatics purification system; The isobutane tower stopped running, processing 90kg of standard coal per ton of C4 raw material, saving 48.5% of energy consumption, high content of propylene in the raw material gas, increased from 15% of the original mass fraction to 50%, low requirements for equipment and heat energy , easy to implement, simple device process, easy to operate, low energy consumption, and stable operation.

Description

[0001] This application is a divisional application with the application number 201110387102X, the application date of November 29, 2011, and the title of the invention "a process and device for processing hydrocarbons by utilizing liquefied gas". technical field [0002] The invention relates to a liquefied gas deep processing device, in particular to a device for processing and producing hydrocarbons by utilizing liquefied gas, belonging to the field of processing and producing hydrocarbons of liquefied gas. Background technique [0003] There are many methods for the processing and separation of liquefied gas used in chemical production. At present, there is mainly one kind commonly used in the industry: first pretreatment of raw materials, the C2C3 components in the liquefied petroleum gas are extracted from the top of the depropanizer, and the mixed C4 components at the bottom of the tower enter the deisobutanizer , the isobutane is separated from the top of the deisobu...

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Problems solved by technology

[0004] This method has high requirements on equipment and heat energy, especially when separating isobutane in the de-isobutanizer tower, 200 layers of trays are needed, the height of the whole tower reaches 160 meters, and the temperature at the top of the tower is not lower than 50°C. The thermal conditions are harsh, the energy consumption is high, accounting for 50% of the total energy consumption, the operation of the device is uncoordinated, and the quality of the isobutane product cannot meet the requirements; at the same time, the content of propylene in the raw gas produced is low, only 15%, resulting in the downstream gas Unstable operation of sub-device

At the same time, the aromatic hydrocarbon impurity content after the aromatization reaction is high, the market competitiveness of the product is weak, and the price is low

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