What causes the temperature in the convection section of a converter to rise by 100°C, and what are the solutions?
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The exit temperature of the converter is not high (730°C), but the temperature in the convection section is high (830°C). The negative pressure in the converter is 50.
The negative pressure should be around -30, not exceeding -40； Is there a burner at the inlet of the convection section? The conversion is an endothermic reaction, so the temperature should decrease. Excluding factors such as negative pressure, another possibility to consider is whether there is a leak in the coils of the heat exchanger in the convection section
There should be no leaks in the heat exchange plates of the convection section – are there any other factors?
The air flow is too high, and the heat is carried away. Check the furnace temperature distribution to see if the temperatures in the upper, middle, and lower layers show a gradual decrease
Is there anything abnormal? 730℃ is the exit temperature of the process gas from the furnace tube, while 830℃ is the temperature of the flue gas; there is no problem with this, as the temperature of the flue gas should indeed be higher than that of the medium – a temperature difference is necessary for heat transfer to occur.
Is the temperature different from before? The outlet temperature of my device is roughly the same as the inlet temperature of the convection section