High-temperature air preheater
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Is there any air preheater available on the market today that can achieve an outlet temperature of 1200, 1300°C or higher? With a maximum air volume of 200 L/min, what heating structure should be used?
The last edit to this post was made by Standing in the East on 2009-8-3 at 18:55. Does the temperature of over 1200 or 1300°C mentioned by the original poster refer to the heated medium? If it refers to the fluid that is heated, then the temperature of that fluid must be very high; it certainly can’t be used in boilers! I’ve never seen anything this tall
I’ve never heard of air preheaters operating at temperatures above 1200 or 1300°C; the highest temperature I’ve seen is 750°C. It’s said that 750°C is already quite challenging to handle, so just imagine how high the temperature of the heat source would need to be to reach 1300°C. A flow rate of 200 L/min isn’t very high, and I suggest that the person in question use hydrogen gas for heating – using hydrogen should not cause any pollution.
It is not the same as the air preheater of a boiler. The heating medium is ambient air or oxygen. The main issue is the high temperature parameters; if no ready-made products are available, the initial idea is to design a resistance furnace using silicon-carbon or silicon-molybdenum rods for heating.
What is the ultimate goal of the poster in heating? It would be great if you could describe the process flow roughly, so that we can get a glimpse of it as well.
The temperature is also too high. . . I’m hearing about this for the first time; could the original poster provide more details?
Is the air volume that low? Direct combustion – are there any requirements for the components?
A regenerative air preheater using ceramics as the heat storage material can be considered.
I’ve never heard of an air preheater in which the outlet temperature of 1# soulwave is above 1200 or 1300°C, as such devices are not needed in boilers at all. The reason air preheaters are installed in modern boilers is mainly to lower the exhaust gas temperature; therefore, there’s no need to heat the hot air to such high temperatures as 1200 degrees. It’s likely that what you’re referring to is HATC, That is, regenerative combustion, which is used in industrial furnaces (such as hot blast stoves or heating furnaces used in metallurgy). However, it seems that the current international standard is to heat the air to around 1000–1100 degrees.
Plate-type air preheaters can solve this problem, but they require high-nickel alloy materials, which are expensive. Materials, Service Temperature: CS ≤425°C – Corten (STEN); ≤540°C – SS304 (SUS304); ≤800°C – SS309 (SUS310); ≤900°C – SS321 (SUS321); ≤900°C – 253MA (S30815); ≤900°C – SS310 (SUS310); ≤900°C – 800H; ≥1200°C – Cast iron. Resistance to sulfur corrosion: Glass. Used in sulfur recovery units
If you would like to discuss further, you can send me an email at nm-gyf@vip.sina.com