When designing new projects, how are the adiabatic furnace chambers and water-cooled wall furnace chambers determined? Are there any rules?
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I would like to ask about the selection principles for adiabatic furnace chambers and water-cooled wall furnace chambers. In my opinion, insulated furnaces have a strong heat storage capacity due to the use of large amounts of refractory materials, which allows for a more uniform furnace temperature; they are suitable for the harmless treatment of organic materials and are thus appropriate for incinerators. Water-wall boilers focus on the conversion and utilization of the chemical energy of fuel, with operational economy being the primary consideration. Please give me some advice. Thank you!
Adiabatic furnace chamber + water wall: lol
There seems to be no clear regulatory requirements or rules for this; it’s simply a matter of deciding what approach to take based on the design and the client’s requirements；
This post was last edited by goldliyang on 2021-3-26 08:41. I’ll share my understanding briefly; please point out any mistakes. I largely agree with the original poster’s view; the membrane wall of the water-cooled wall offers better economic efficiency, as it enables more efficient heat recovery, eliminates the need for cooling air, and results in a higher steam production volume. At the same time, the surface temperature of the water wall remains uniform, which is highly suitable for the incineration of saline waste; it helps to prevent alkali explosions and extends the lifespan of the furnace. Limitations of water-cooled membrane walls: If the fuel is considered hazardous waste, regulations require that the temperature inside the furnace reach 1100°C, with flue gas staying there for at least 2 seconds. In this case, due to the good heat transfer performance of the water wall, the furnace temperature remains low; therefore, there is no need for insulation in the furnace, as its natural insulation effect is sufficient. It is necessary to increase the furnace temperature through gas make-up combustion, which leads to reduced efficiency. The exception is: if the calorific value of the waste fuel is high and the adiabatic combustion temperature is high, no make-up combustion is required, and a water-cooled furnace chamber is suitable.