Inspection System and Key Points for Hidden Danger Investigation of Coal fired Lime KilnsLime KilnsLime Kilns
A sound inspection system is the core to ensure the safe and stable operation of coal fired lime kilns. It is necessary to establish a standardized process of classification, responsibility and frequency, covering comprehensive inspections from kiln structure, refractory materials, combustion system to environmental protection facilities. Daily inspections should focus on abnormal surface temperature of the kiln shell, observation of refractory material peepholes, and the smooth operation of the feeding and discharging system. Regular professional inspections should use infrared thermography to analyze the temperature distribution of the kiln body, evaluate the corrosion condition of the inner lining, and systematically detect the ovality and centerline deviation of the kiln body, providing accurate data support for preventive maintenance.
The investigation of hidden dangers should focus on the subtle changes in key process links. The combustion system should accurately monitor the coal powder particle size, air coal ratio, and spray gun operating conditions to prevent incomplete combustion or local overheating. The stability of ventilation and airflow distribution in the kiln directly affects the activity and energy consumption of lime, and diagnosis needs to be carried out through negative pressure monitoring and analysis of flue gas composition. In terms of structural hazards, the settlement of kiln pier foundation, wear of the contact surface between the wheel and the supporting wheel, and the stress state of the blocking wheel are the key monitoring points. Any abnormal vibration or sound must be traced back to its mechanical origin. Electrical and automation systems need to ensure that each sensor and actuator responds sensitively and reliably, with effective interlock protection functions to prevent misoperation or refusal to operate.
By closely combining systematic inspections with in-depth hazard investigation, it is possible to proactively identify equipment degradation trends and process parameter deviations, thereby controlling operational risks in their infancy and achieving long-term intrinsic safety and optimal energy efficiency in production.
