Numerical simulation study on converter gas upgrading increment in different blowing stages via dry methane reforming

The aim of this study to solve the problems of low waste heat utilization, high carbon emission, low calorific value of recovered gas, and insufficient gas volume in the traditional converter gas treatment process and proposes to utilize methane dry reforming technology for more efficient segmental reforming of the gas generated from different blowing stages in the converter production process. According to the change of gas composition in different stages of blowing, the amount of coke oven gas is adjusted to achieve the purpose of reducing carbon emission and improving the quality and yields enhancement of converter gas. Results indicate that the optimal reforming temperature within the converter flue should exceed 800°C, the reformation effect of gas components is best in the initial blowing stage and worst in the main blowing stage. With the corresponding optimal ΦCOG values for the initial, main, and end blowing phases being 0.412, 0.399, and 0.404, respectively. Under these conditions, the reformed gas demonstrates a 5.75% increase in calorific value, 15.58% volume expansion, and 31.50% reduction in CO2 emissions.