How does the secondary combustion chamber of an incinerator work?
The principle is that carbon monoxide produced by incomplete combustion can lead to secondary combustion.
Due to the low temperature of the incinerator and insufficient oxygen supply, incomplete combustion is prone to occur during boiler ignition and shutdown. Incomplete combustion products such as carbon black, coal powder, and oil point enter the tail of the boiler and deposit with the flue gas, reducing the heat transfer effect of the tail heating surface and increasing the exhaust temperature.
When the exhaust temperature rises to a certain level and there is enough oxygen for combustion, secondary combustion occurs. Incineration is a kind of equipment used for incineration and disposal of garbage. Garbage burns in the furnace, becoming waste gas and entering the secondary combustion chamber. It burns completely under the forced combustion of the burner, and then enters the spray dust collector.
Secondary combustion conditions:
1. The presence of carbon monoxide; High temperature; There is an excess of oxygen.
2. The decrease in oxygen content rather than an increase indicates that the complete combustion of carbon monoxide in the dilute phase consumes oxygen. However, the long-term existence of this situation indicates that secondary combustion is very serious. If it is a complete regeneration process of the pre fired tank, it may be due to insufficient combustion intensity in the tank or a broken distribution pipe, resulting in a shorter catalyst residence time in the tank.
3. Add CO additive, if secondary combustion cannot be eliminated, cut off the main air according to the maximum temperature that the equipment can withstand and the working condition of the exhaust fan, and identify the cause according to the situation.
——Author：EBICO