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E-mail
15122725930@163.com
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15122725930
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No. 11 Shuangchuan Road, Beichen Economic Development Zone, Tianjin
Tianjin Zhonghuan Electric Furnace Co., Ltd
How to ensure the stable operation of tube heating furnace: systematic guarantee from installation to operation
Date: 2025-09-22Read: 2
Tubular heating furnaceAs the core thermal equipment in industries such as petrochemicals and metallurgy, its stable operation is directly related to production safety and energy efficiency. To achieve long-term stable operation, it is necessary to establish a systematic guarantee system covering the entire lifecycle, with a focus on implementing control from three dimensions: scientific installation, standardized operation, and intelligent maintenance.
1、 Precise installation lays the foundation for operation
During the equipment installation phase, it is necessary to strictly follow the process design parameters, and the basic load-bearing platform must meet the dynamic load requirements of the equipment during full load operation, with a horizontal error controlled within 2mm/m. The relative position between the burner and the furnace tube needs to be accurately positioned according to the thermal distribution map to ensure that the flame does not directly flush the furnace tube. The connection between the flue gas waste heat recovery system and the main furnace body should adopt a flexible compensation structure to prevent thermal expansion stress concentration. All instrument pressure points should be arranged according to the principle of equal cross-section, and the protective sleeve of the temperature measuring element should maintain a 30 ° angle with the flow direction of the medium to ensure that the monitoring data truly reflects the working conditions inside the furnace.
2、 Standardized operations build operational order
Before starting the furnace, a three-level inspection system must be implemented: the first level inspection confirms that the fuel system pressure is stable (natural gas ≤ 0.8MPa), the second level inspection checks that the furnace oxygen content is<8%, and the third level inspection checks that the circulating cooling water flow rate is ≥ 90% of the design value. The heating process strictly follows a gradient control curve of 50 ℃/h, and the temperature difference on the surface of the furnace tube is controlled within ± 20 ℃ through a PID regulator. During normal operation, continuously monitor the furnace wall temperature (scanned by an infrared thermal imager every 2 hours), furnace negative pressure (-20~-50Pa), and flue gas oxygen content (3%~5%). Activate the interlock protection system in emergency situations, and automatically cut off the fuel supply when the furnace wall temperature exceeds 450 ℃ or the furnace pressure rises sharply by 15%.
3、 Preventive maintenance extends service life
Establish a predictive maintenance system based on equipment status, detect the thickness of refractory lining on a monthly basis (repair required for thinning rate>2mm/year), and analyze the impurity content of fuel composition on a quarterly basis (strengthen soot blowing frequency when sulfur content>0.5%). Ultrasonic thickness gauges are used to regularly detect the thinning of furnace tubes (mandatory replacement for carbon steel furnace tubes with remaining wall thickness<30% of the design value), and an online monitoring system analyzes the vibration spectrum in real time (warning for bearing seat vibration speed>4.5mm/s). Annual thermal efficiency testing is conducted to reduce exhaust losses by adjusting the excess air coefficient (optimized to 1.1-1.2).
Through systematic management of the entire process, modernTubular heating furnaceIt can achieve a continuous operating cycle of over 8000 hours. This guarantee mode that combines mechanical integrity management, process control technology, and preventive maintenance not only ensures the long-term operation of production equipment, but also increases energy utilization to over 92%, creating significant economic benefits and safety value for enterprises.