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异构化反应器换剂改造形式研究
Study on Reactor Modification for a Catalyst Change Project in an Isomerization Unit
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- DOI:
- 作者:
- 隋依彤
Sui Yitong
- 作者单位:
- 中国石化工程建设有限公司
Sinopec Engineering Corporation
- 关键词:
- 异构化反应器；换剂改造；轴向；径向
Isomerization reactor; Catalyst change and modification; Axial; Radial
- 摘要:
- 针对某芳烃联合装置异构化单元在大修期间的换剂扩能改造进行方案研究。装置计划将乙苯转化型催化剂 RIC-200 更换为脱烷基型 SKI-320，并探讨反应器改造为轴向或径向结构的方案。通过核算发现，采用轴向方案将导致催化剂床层压降增加约 270 kPa，使反应系统总压降显著升高，进而引起压缩机出口压力与功率大幅上升，同时加热炉负荷增加，空冷器冷却能力不足。能耗分析表明，轴向方案相较径向方案将使对二甲苯产品的综合能耗增加约4.98 kg 标油/t。因此，在主要设备利旧的条件下，维持原有的径向反应器结构方案更具优势，该系统压降低、能耗增加少，且对原有设备适应性更强。
This study focuses on the retrofit and expansion plan for the isomerization unit of an aromatics complex during a major
overhaul in 2026. The plan involves replacing the current ethylbenzene conversion catalyst (RIC -200) with an ethylbenzene
dealkylation catalyst (SKI-320), along with evaluating the reactor modification scheme, specifically comparing axial and radial
configurations. Analysis shows that the axial reactor scheme would increase the catalyst bed pressure drop by approximately 270
kPa, leading to a significant rise in the total system pressure drop. Consequently, this would require higher compressor outlet
pressure and a substantial increase in compressor power consumption. Furthermore, it would elevate the heating furnace load and
potentially exceed the cooling capacity of the air cooler. The energy consumption analysis indicates that compared to the radial
scheme, the axial scheme would increase the comprehensive energy consumption per ton of para-xylene product by about 4.98 kg
of standard oil. Therefore, under the premise of reusing major existing equipment, maintaining the original radial reactor
configuration is recommended, as it offers lower system pressure drop, smaller energy consumption increase, and better
compatibility with existing equipment.