Working Principle of Cracking Furnace

Here is how the cracking furnace works:

1. Fuel combustion: fuel (liquid or gas) and air are mixed in the burner and sprayed into the furnace for combustion, and the high temperature gas generated is heated in the radiation chamber.

2. Preheating of raw materials: In the convection chamber, raw materials and water vapor are preheated to a certain temperature (about 773-873K), and then enter the furnace tube of the radiation chamber for cracking reaction .

3. Cracking reaction: The cracking reaction of hydrocarbon raw materials occurs at high temperature in the radiation chamber to produce ethylene, propylene and other products. The reaction time is usually 0.8 to 0.9 seconds

4. Heat recovery: The heat generated by the cracking reaction is dissipated through the cooler to maintain the stability of the reaction. At the same time, part of the waste heat can be recovered through the air preheater, improving combustion performance and flame temperature .

5. Product separation: the cracking product is extracted from the furnace top and enters the cooling system for cooling and separation. Separators separate light carbon and other substances for subsequent processing and utilization.

In general, the cracking furnace achieves effective cracking of hydrocarbon raw materials through high temperature heating and controlling reaction time, and improves production efficiency and product quality through reasonable structural design and heat management.