Summary of process design and application of heat recovery boiler for catalytic cracking unit

Petroleum Refinery Engineering ›› 2025, Vol. 55 ›› Issue (2): 16-20.

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Summary of process design and application of heat recovery boiler for catalytic cracking unit

Chen Zhenjiang

SINOPEC Guangzhou Engineering Co., Ltd.

Online:2025-02-15 Published:2025-02-25

催化裂化装置余热锅炉工艺设计及应用总结

陈振江

中国石化广州工程有限公司

作者简介:陈振江，高级工程师，硕士，毕业于辽宁石油化工大学有机化学专业，主要从事催化裂化工艺和工程设计工作。联系电话：020-22192808，E-mail: chenzej.lpsec@sinopec.com。

Abstract

Abstract:

In this paper, the steam production grade of heat recovery boiler, the selection of exhaust temperature, the problem of afterburning of heat recovery boiler and the resistance of smoke wind were discussed in detail. The problems of low-temperature corrosion of economizer and thermal stress fatigue leakage of tube bundle were comprehensively expounded. Compared to producing medium steam, the heat recovery boiler can increase benefit by 10-15 yuan per ton of steam when producing high-pressure steam. The energy consumption of a FCC unit was reduced by 1.15 kgoe/t by using less afterburn technology. The heat recovery boiler adopted composite crystalline membrane technology, which avoided the reaction between the tube bundle and corrosive gases in the flue gas. It not only effectively prevented dew point corrosion and avoided furnace tube leakage and explosion, but also significantly reduced the accumulation of ash and scaling in the heat recovery boiler. The temperature difference between the front and rear of the furnace tube was reduced from 110℃ to 50℃, and the energy-saving effect was excellent.

Key words: catalytic cracking unit, heat recovery boiler, steam parameters, fuel gas consumption, exhaust temperature, economizer leakage, smoke and wind resistance, composite crystalline membrane

摘要：

对余热锅炉产汽等级、排烟温度选择和余热锅炉补燃问题以及烟风阻力进行了详细论述。对于省煤器低温腐蚀和管束热应力疲劳泄漏问题进行了全面阐述。余热锅炉产高压蒸汽相较于中压蒸汽，每吨蒸汽增加效益10～15元。某催化裂化装置采用少补燃技术，装置能耗减少1.15 kgoe/t。余热锅炉采用复合结晶膜技术，避免管束与烟气中腐蚀性气体反应，不仅能有效阻止露点腐蚀，避免炉管泄漏爆管，而且能显著降低余热锅炉积灰结垢，炉管前后温差由110℃降至50℃，节能效果优良。

关键词: 催化裂化装置, 余热锅炉, 蒸汽参数, 燃料气消耗, 排烟温度, 省煤器泄漏, 烟风阻力, 复合结晶膜

Chen Zhenjiang. Summary of process design and application of heat recovery boiler for catalytic cracking unit[J]. Petroleum Refinery Engineering, 2025, 55(2): 16-20.

陈振江. 催化裂化装置余热锅炉工艺设计及应用总结[J]. 炼油技术与工程, 2025, 55(2): 16-20.

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Summary of process design and application of heat recovery boiler for catalytic cracking unit

催化裂化装置余热锅炉工艺设计及应用总结

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