EP 4227383 A1 20230816 - A METHOD FOR DETERMINING A TIME FOR DECOKING A STEAM CRACKING PLANT
Title (en)
A METHOD FOR DETERMINING A TIME FOR DECOKING A STEAM CRACKING PLANT
Title (de)
VERFAHREN ZUR BESTIMMUNG DER ZEIT ZUM ENTKOKEN EINER DAMPFCRACKANLAGE
Title (fr)
PROCÉDÉ PERMETTANT DE DÉTERMINER UNE HEURE POUR LE DÉCOKAGE D'UNE INSTALLATION DE CRAQUAGE À LA VAPEUR
Publication
Application
Priority
EP 22020042 A 20220209
Abstract (en)
The present invention relates to a computer implemented method for determining a time for decoking steam cracking furnaces of a steam cracking plant, wherein the steam cracking plant comprises at least two cracking furnaces, the method comprising the steps of providing (201) a model for simulating an operation of each cracking furnace during a predetermined time interval and for determining a production yield of each cracking furnace and an accumulation of coke in each cracking furnace during this predetermined time interval; defining (202) for each cracking furnace at least two operating scenarios, wherein each operating scenario specifies individual operating conditions for the operation of the corresponding cracking furnace; formulating (203) as an optimisation problem to maximise the production yield of each cracking furnace utilising the model in dependence of a time of decoking of each cracking furnace, at which during the predetermined time interval the accumulated coke in the corresponding cracking furnace is at least partially removed; solving (205) the optimisation problem and determining (208) an optimised time of decoking for each cracking furnace comprising selecting (206) one of the corresponding at least two scenarios for each of the cracking furnaces.
IPC 8 full level
C10G 9/36 (2006.01); C10G 9/00 (2006.01); C10G 9/16 (2006.01); C10G 75/00 (2006.01)
CPC (source: EP)
C10G 9/007 (2013.01); C10G 9/16 (2013.01); C10G 9/36 (2013.01); C10G 75/00 (2013.01)
Citation (applicant)
- "Ullmann's Encyclopedia of Industrial Chemistry", 15 April 2009, article "Ethylene"
- KUNJIE YULYNDON WHILEMARK REYNOLDSXIN WANGZHENLEI WANG: "Cyclic scheduling for an ethylene cracking furnace system using diversity learning teaching-learning-based optimization", COMPUTERS & CHEMICAL ENGINEERING, vol. 99, 2017, pages 314 - 324, ISSN: 0098-1354, Retrieved from the Internet <URL:https://doi.org/10.1016/j.compchemeng.2017.01.024>
- HEEJIN LIMJAEIN CHOIMATTHEW REALFFJAY H. LEESUNWON PARK: "Development of Optimal Decoking Scheduling Strategies for an Industrial Naphtha Cracking Furnace System", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 45, no. 16, 2006, pages 5738 - 5747
- CHUANYU ZHAOCHAOWEI LIUQIANG XU: "Dynamic Scheduling for Ethylene Cracking Furnace System", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 50, no. 21, 2011, pages 12026 - 12040
- LIJIE SULIXIN TANGIGNACIO E. GROSSMANN: "Scheduling of cracking production process with feedstocks and energy constraints", COMPUTERS & CHEMICAL ENGINEERING, vol. 94, 2016, pages 92 - 103, XP029760683, ISSN: 0098-1354, Retrieved from the Internet <URL:https://doi.org/10.1016/j.compchemeng.2016.07.023> DOI: 10.1016/j.compchemeng.2016.07.023
Citation (search report)
- [A] US 2020096982 A1 20200326 - MITTAL AKASH [IN], et al
- [A] US 2017101586 A1 20170413 - ILIYAS ABDULJELIL [SA], et al
- [X] LIN XINWEI ET AL: "Data-Driven Modeling and Cyclic Scheduling for Ethylene Cracking Furnace System with Inventory Constraints", INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol. 60, no. 9, 24 February 2021 (2021-02-24), pages 3687 - 3698, XP055932342, ISSN: 0888-5885, DOI: 10.1021/acs.iecr.0c06085
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 22020042 A 20220209