Measures to Ensure Reliable Operation of Electric Heaters
Ensurethe reliable operation of electric heatersmainly includes the following points:1 Optimizethe design and installation of the electric heater to prevent internal ash accumulation
The burnout of electric heating tubes is the most frequent fault among all faults, mainly caused by excessive internal ash accumulation that cannot be discharged. Since replacing electric heating tubes takes a long time, when multiple tubes burn out, the outlet temperature of the heater will not meet system requirements, affecting unit load for a long time or even causing shutdown, resulting in huge economic losses for the enterprise. Therefore, during the selection of electric heaters, system design, and installation, special attention should be paid to internal ash accumulation. The manufacturer should be required to increase the distance between the heating tubes and the inner wall of the body, and arrange spare electric heating tubes at the bottom.
2 Improve the ventilation and heat dissipation of the electric heater control cabinet to ensure that the ambient working temperature does not exceed25°C
Since theSCR power regulator generates a large amount of heat when the thyristor works and has a thyristor over-temperature interlock protection trip function, when the thyristor working temperature exceeds70°C, its temperature control element is triggered, and the interlock contactor trips. During equipment operation, equipment shutdown failures caused by internal heat dissipation issues of the electric heater control cabinet and ambient temperature issues occur from time to time. Therefore, it is very important to improve the ventilation and heat dissipation of the electric heater control cabinet and ensure its working environment temperature. Before ordering the heater control cabinet, the manufacturer should be required to use high-power cabinet cooling fans in the design, enlarge the air inlet area, design the cabinet size reasonably, and reserve sufficient remaining space inside. The power distribution room where the control cabinet is located should be equipped with at least two air conditioners to ensure that the temperature in the power distribution room is kept below25°C.
3 Strengthen the inspection of electric heaters to promptly detect and handle equipment abnormalities
