During startup, the temperature of the converter fails to reach 400 degrees
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During startup, the converter is heated for the second time, with the requirement that the temperature in each bed reach 400 degrees. Gas is used for ignition in order to raise the temperature of the furnace, but the temperature only reaches around 350 degrees. Does anyone have any good suggestions? Tell me what the respective heating temperatures are
Here, we heat a volume of air to around 410 degrees to receive the flue gas.
We convert a section so that it will start accepting flue gas around 428.
Our plant’s electric furnace is being heated up; it starts to accept flue gas at 410 degrees
Our factory also uses electric furnaces to raise the temperature; air is introduced only after the temperature reaches 410 degrees before starting up the operation.
When raising the temperature, it’s important to consider what happens at each specific temperature level. If we’re talking about one particular temperature stage, then it’s only after maintaining that temperature for a certain period of time that it’s safe to introduce smoke gases. If that temperature is reached while the temperatures in other stages have not risen to the required levels, then introducing smoke gases could cause environmental problems. Each catalyst manufacturer will provide you with guidelines regarding the appropriate temperature levels for each stage; remember that it’s best not to introduce smoke gases if the temperatures do not meet the required standards, especially since operating at temperatures below the ignition point poses even greater risks
Based on the experiments conducted to address the conversion issues encountered in our plant, it has been proven that 380 degrees is the minimum acceptable inlet temperature. At this temperature, it is possible to start the system and supply gas, with barely any exhaust gases produced. It is important to keep the gas concentration low, around 6%-7%, and it is normal for the outlet temperature to rise steadily. In such cases, heating must be applied to maintain this temperature; if the temperature drops below 380 degrees and the system is forced to operate without an exhaust gas absorption device, serious consequences can arise, including environmental violations
Connect air after stabilization at 405-415.
Is the heat exchanger size too small after the furnace is put into operation, causing the air volume of the main fan to decrease slightly?
Let’s not mislead people – it’s of course better if each section reaches temperatures above 400°C; after the system is ventilated, the temperatures in each section quickly return to normal (which is also related to the operational adjustments), but in practice this is very difficult to achieve. Economics also need to be considered. If heating up is difficult, to prevent the formation of acid mist, the minimum temperature in all sections except one should be no lower than 250°C, after which ventilation can be used for production.
A section that can accommodate a layer of low-temperature catalyst (with ignition at 380 degrees) can address the issue of insufficient temperature rise, but the temperature should be at least 380 degrees or higher.