Catalytic reforming recontacting process with cold capacity equalization setting

Abstract

The invention relates to a catalytic reforming recontacting process with cold capacity equilibrium setting, introduced based on the research on the characteristics of the reforming reaction recontacting process flow and the gas-liquid equilibrium characteristics of the product. Two pumps are installed at the bottom of the first gas-liquid separation tank, after being boosted, two-stranded liquid phase enter a recontacting system and a reforming oil fractionation system respectively, the ratio of the two liquid phases can be flexibly adjusted to optimize the recontacting effect and reduce energy consumption; second, third and fourth gas-liquid separation tanks use the way of heat exchange or setting a cooler to reduce the recontacting temperature, reduce the gas phase load of the compressorinlet and the energy consumption; the liquid phase of the second and third gas-liquid separation tanks directly enters the subsequent reforming oil separation system to reduce the accumulation and circulation of the liquefied gas and the above hydrocarbon components in the recontacting system to reduce the energy consumption of device.

Description

technical field [0001] The invention relates to the technical field of catalytic reforming devices, in particular to a catalytic reforming and recontacting process with cooling balance setting. Background technique [0002] Catalytic reforming is one of the most important secondary processing processes in the oil refining and petrochemical industry. It is an important means of producing aromatics and high-octane clean gasoline, and it is also an important source of hydrogen for refining and chemical enterprises. In recent years, with the increasing demand for aromatics and the rapid development of hydrogenation technology, catalytic reforming units have developed rapidly. [0003] Improving reforming hydrogen yield and purity, reducing hydrogen loss, and increasing liquid yield are the main ways to improve the economic and technical indicators of continuous reforming units. The operating pressure of the new continuous reforming reaction separation tank is only 0.24MPaG. Und...

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Problems solved by technology

However, since the heavy component with better absorption effect is not used in the recontact system, only slightly lighter components are used for recontact. Under the same recontact temperature and pressure conditions, the recontact effect is not good, resulting in a decrease in the purity of circulating hydrogen.

The patent document CN106350113A adopts the form of recontacting tower for gas-liquid separation, which leads to more complex equipment and higher cost of recontacting system

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