TO STUDY THE DIFFERENCE OF TEMPERATURE (DELTA) BETWEEN THE PEAK TEMPERATURE ON LEFT SIDE AND RIGHT SIDE DURING NORMAL FIRING IN GLASS TANK MELTING FURNACE

Abstract

Glass Tank Melting furnaces utilize a cross-fired approach, with burners alternating between the left and right sides in 20-minute cycles. During normal firing, a significant temperature difference, known as delta, is observed between the peak temperatures achieved on the left and right sides. This temperature delta exceeds the permissible limit of ±2 °C, resulting in furnace process instability and energy losses. To address this issue, a two-month action plan was implemented. In the first month, various parameters were analyzed to identify the key factors affecting the temperature delta. In the second month, corrective actions were taken, following a standard Kaizen procedure. Parameters investigated included combustion air flow, air-gas ratio, batch moisture, regenerator top and bottom temperature differences, natural gas flow, combustion air flow, draft pressure, burner parameters, flue gas analysis, net calorific value variation, and more. Notably, the combustion air flow, total gas flow, and air-gas fuel ratio demonstrated a strong correlation with the temperature delta. Several issues were identified, such as excess air and equipment calibration discrepancies. Recommendations for resolving these issues included adjusting excess air ratios, calibrating burner parameters, sealing cracks and holes, and upgrading flow measurement devices. Additionally, the study suggested reevaluating the correlation between net calorific value and gas flow. This investigation seeks to enhance furnace efficiency, minimize energy losses, and ensure a consistent temperature profile during glass production.