Shanghai Petrochemical achieved a year-on-year increase of 9.3% in propylene output

SINOPEC News Network News Since this year, the Shanghai Petrochemical Refining Department has been closely following market conditions, flexibly adjusting its product structure, and making every effort to increase the output of high value-added products
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Implement transformation to increase equipment production capacity

In the first half of the year, the employees of the No.
5 oil refining unit seized the opportunity to stop work for maintenance in April, and carried out de-bottlenecking transformations on the four towers of the No.
2 gas fractionation unit
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After close communication between plant technicians and design institutes and manufacturers, they formulate a transformable plan without changing the diameter of the propylene tower.
Only by optimizing the form of the tray downcomer, setting up a suspended downcomer, and improving the production process of the device Ability
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After this transformation, the production capacity of the device has increased by 28% compared with the previous one, which fully meets the needs of upstream catalytic devices to flexibly adjust the product structure, increase the yield of liquefied gas, and increase the production of propylene
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Organize research to increase propylene yield

As early as December 2020, the management staff of the No.
2 catalytic cracking unit participated in the seminar on propylene production increase additives to gain insight into the situation and expected effects of ZSM-5 modified molecular sieve used to increase propylene production
.

　　Since the beginning of this year, Zhou Guoming’s Model Worker Innovation Studio has established a research team.
After several investigations and repeated analyses on the process characteristics of the No.
2 catalytic cracking unit, it was decided to add propylene production additives to increase the yield of catalytic liquefied gas and the concentration of propylene.

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　　"In the third quarter of this year, the No.
2 catalytic unit was filled with 16 tons of propylene additives, and the yield of liquefied gas increased by nearly 0.
7%
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　　In addition, the research team formulated adjustment measures to optimize the relevant process parameters in time, adjust the activity of the balancer, and increase the output of propylene in accordance with the changes in the nature of the raw materials of the catalytic device and the difficulties caused by the operation after the injection of propylene additives
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　　Optimized blending and effective recovery of component propylene

　　After the transformation and implementation of the process of the coking liquefied gas delivery No.
2 gas fractionation unit, on August 20, the coking liquefied gas with qualified total sulfur content was sent to the No.
2 gas fractionation unit for blending for the first time, and the propylene component was recovered
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　　Taking into account the high content of carbonyl sulfide in the coking liquefied petroleum gas, it may cause unqualified propylene quality and cause production problems for downstream polypropylene plants
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　　At the same time, add high-efficiency refined desulfurizers to the coking liquefied gas desulfurization unit to effectively remove carbonyl sulfide from the coking liquefied gas, and gradually increase the blending volume of the coking liquefied gas into the No.
2 gas separation unit in stages, and strengthen the quality tracking of each distillation outlet
.