A Mixed Integer Linear Programming Model for the Optimization of Steel Waste Gases in Cogeneration: A Combined Coke Oven and Converter Gas Case Study

Sergio García García, Vicente Rodríguez Montequín, Henar Morán Palacios and Adriano Mones Bayo
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Sergio García García: EDP, Energias de Portugal, Plaza del Fresno, 2, 33007 Oviedo, Spain
Vicente Rodríguez Montequín: Department of Mining Exploitation and Prospecting, University of Oviedo, C/Independencia 3, 33004 Oviedo, Spain
Henar Morán Palacios: Department of Mining Exploitation and Prospecting, University of Oviedo, C/Independencia 3, 33004 Oviedo, Spain
Adriano Mones Bayo: Department of Mining Exploitation and Prospecting, University of Oviedo, C/Independencia 3, 33004 Oviedo, Spain

Energies, 2020, vol. 13, issue 15, 1-25

Abstract: Off-gas is one of the by-products of the steelmaking process. Its potential energy can be transformed into heat and electricity by means of cogeneration. A case study using a coke oven and Linz–Donawitz converter gas is presented. This work addresses the gas allocation problem for a cogeneration system producing steam and electricity. In the studied facility, located in northern Spain, the annual production of the plant requires 95,000 MWh of electrical energy and 525,000 MWh of thermal energy. The installed electrical and thermal power is 20.4 MW and 81 MW, respectively. A mixed integer linear programming model is built to optimize gas allocation, thus maximizing its benefits. This model is applied to a 24-h scenario with real data from the plant, where gas allocation decision-making was performed by the plant operators. Application of the model generated profit in a scenario where there were losses, increasing benefits by 16.9%. A sensitivity analysis is also performed. The proposed model is useful not only from the perspective of daily plant operation but also as a tool to simulate different design scenarios, such as the capacity of gasholders.

Keywords: off-gas; iron and steel industry; allocation; optimization; MILP modeling; scheduling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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