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A Recontact Process for Reducing Energy Consumption of Catalytic Reforming Unit

A catalytic reforming and recontacting technology, which is applied in naphtha catalytic reforming, petroleum industry, naphtha treatment, etc., can solve problems such as poor recontacting effect, reduced purity of circulating hydrogen, and insignificant separation effect, etc. To achieve the effect of improving the recontact effect, reducing the gas phase flow rate and optimizing the recontact effect

Active Publication Date: 2020-11-10
SHANGHAI HOTO PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.
At the same time, pre-separation at high temperature, the separation effect is not obvious, and the energy saving effect is limited

Method used

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  • A Recontact Process for Reducing Energy Consumption of Catalytic Reforming Unit
  • A Recontact Process for Reducing Energy Consumption of Catalytic Reforming Unit
  • A Recontact Process for Reducing Energy Consumption of Catalytic Reforming Unit

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Embodiment 1

[0047] The catalytic reforming unit recontact process that present embodiment adopts, its process flow is as follows figure 1 As shown, the specific situation is as follows: the reaction product from the reforming reactor enters the first air cooler A-201 after heat exchange with the refined naphtha and circulating hydrogen through the reforming feed heat exchanger E-201, and is cooled to 40 ℃ into the first gas-liquid separation tank V-201. The liquid phase of the first gas-liquid separation tank V-201 is divided into two circuits, one of which is boosted by the re-contact oil phase booster pump P-201A and used as re-contact oil, and cooled to 0 by the re-contact oil cooler E-206 ℃ into the top of the absorption tower T-201, and the other way passes through the reformed oil to the booster pump P-201B of the separation system to boost the pressure and then directly enters the subsequent reformed oil fractionation system. The gas phase of the first gas-liquid separation tank V...

Embodiment 2

[0049] see figure 2 As shown, another catalytic reforming unit recontacting process described in this embodiment is different from Embodiment 1 in that a second gas-liquid separation tank V-202 is provided. The liquid phase at the bottom of the absorption tower T-201 and the gas phase at the top of the first gas-liquid separation tank V-201 perform heat exchange in the gas phase of the first gas-liquid separation tank-recontact oil heat exchanger E-202B, and the recontact oil directly enters the follow-up Reformate fractionation system. The gas phase at the top of the first gas-liquid separation tank V-201 is cooled to 35°C and enters the second gas-liquid separation tank V-202 for gas-liquid separation. The gas phase at the top of the tank enters the reforming cycle hydrogen compressor K-201, and the liquid phase passes through the second After the gas-liquid separation tank bottom pump P-204 is boosted, it enters the subsequent reformate fractionation system.

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Abstract

The invention relates to a recontacting process for reducing the energy consumption of a catalytic reforming device. By arranging two pumps at the bottom of a first gas-liquid separation tank and entering a recontacting system and a reforming oil fractionation system after the pressure is raised, the ratio of two liquid phases can be adjusted flexibly, the recontacting effect is optimized, and theenergy consumption is reduced; an absorption tower is used for recontacting, so that the flow rate of a recontacting oil phase is reduced, the recontacting effect is effectively improved, and the energy consumption is reduced; furthermore, by adopting the measures of cooling a gas-liquid separation material by means of the liquid phase at the bottom of the absorption tower, enabling the liquid phase at the bottom of the gas-liquid separation tank to directly enter the reforming oil fractionation system, and the like, the accumulation and circulation of liquefied gas and hydrocarbon componentsin the recontacting system are reduced, the load of a compressor is reduced, and the energy consumption of the device is reduced.

Description

technical field [0001] The invention relates to the technical field of catalytic reforming, in particular to a recontact process for reducing energy consumption of a catalytic reforming device. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G61/02C10G35/04
CPCC10G35/04C10G61/02
Inventor 蔡明件马成国张韩王丁何平
Owner SHANGHAI HOTO PETROCHEM ENG