Optimized temperature uniformity and pressure loss in the baking finish oven of the enameled wire

The paper deals with the temperature uniformity and pressure loss in the hearth of the baking finish oven of the Enameled Wire with catalytic combustion and circulating flow. A numerical model of a RXHW3600 24-wire baking finish oven is built by Fluent, which is validated by the experimental velocities of the cold flow. The maximum temperature difference along the width direction of the hearth (MAX ΔT) and the pressure drop along the computational domain (MAX ΔP) are mainly investigated numerically. It shows that the MAX ΔT is too high, which will lead to a poor wire quality and large energy consumption. The MAX ΔP is very high too, which will increase the power loss. Detailed numerical work is carried out to investigate the correlations between the configuration parameters (branch air duct spacing, hearth width and air flow rate) and the MAX ΔT/MAX ΔP. Orthogonal method is used to determine the optimal structure parameters of the air distribution device. It is shown that the optimal air distribution device significantly reduces the MAX ΔT and the MAX ΔP. The MAX ΔT decreases by 79.1% and the MAX ΔP decreases by 37.8% respectively after optimization for the single-baffle structure. The MAX ΔT decreases by 78.1% and the MAX ΔP decreases by 42.9% after optimization for the three-baffle structure.