How to deal with the problem of easy damage to the regenerative air preheater?
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For manufacturers that use air preheaters for conversion, if they wish to increase the rate of temperature rise during conversion, they must raise the outlet temperature of the air preheater; this can easily lead to damage to the air preheater. When the flue gas temperature increases, the lower tube sheet of the air preheater is prone to deformation, leading to leaks. It is common to hear about air preheaters used for heating up processes in factories getting damaged.
The lower gas chamber of our air preheater is lined with refractory material.
Even the lining refractory materials can be easily damaged; the refractory materials used are those parts of the smelting furnace that are still usable after repair
Is it the high-temperature air preheater in front of the convection chamber or the low-temperature air preheater behind it that tends to break down more easily?
If it is the preheater in the high-temperature section ahead of the convection chamber of the hydrogen production converter, the material used there needs to be changed; since the temperature of the flue gas in this section is above 700 degrees, 304 material cannot withstand such high temperatures. At the outlet of the low-temperature section, 304 material cannot resist dew point corrosion, so the material there also needs to be changed.