Mathematical modelling of selected processes utilizing combustible process gases

Combustible process gases are by-products of many technological processes. They vary in their calorific value and are used to decrease the usage of gases whose calorific value is higher. Coke oven gas from the coking process and process gases from an electric furnace in a copper plant are examples of such gases. Composition and calorific value of coke oven gas depend on coking parameters as well as on the type and quality of coal. The most common process where the coke oven gas is used is the process of heating combustion air in a heat regenerator. The gases from the electric furnace (due to low calorific value) require afterburning at the beginning of their utilization process. The paper addresses mathematical modelling of a coke oven battery regenerator and mathematical modelling of post combustion the electric furnace process gases. The regenerator mathematical model was elaborated for the simplified geometry of a real object making the assumptions for the heat transfer equations. Also simplified geometry of a real object was built to model the post combustion process. Description of occurring processes includes in this case turbulence and radiation phenomena.