The principle is that the carbon monoxide produced by incomplete combustion is burned again.
In the boiler ignition and shutdown, due to the furnace temperature is low, the oxygen supply is insufficient, easy to produce incomplete combustion. Incomplete combustion products such as carbon black, coal dust, oil points, etc. with the flue gas into and deposited in the tail of the boiler, reducing the heat transfer effect of the heat receiving surface of the tail, so that the exhaust smoke temperature increases.
When the exhaust temperature rises to a certain value and there is enough oxygen to help combustion, secondary combustion will occur. Garbage incinerator is incineration treatment of garbage equipment, garbage combustion in the furnace chamber, into the exhaust gas into the secondary combustion chamber, in the burner of the forced combustion of combustion is complete, and then into the spray dust collector, dust removal and then discharged into the atmosphere through the chimney.
Extended information
Secondary combustion conditions
1, the presence of carbon monoxide; high temperature; the presence of excess oxygen.
2. Oxygen levels fall but do not rise any more, indicating that the complete combustion of carbon monoxide in the dilute phase consumes oxygen. However, the existence of this situation for a long time, indicating that the secondary combustion is very serious, if the front burner tank completely regeneration process, may be due to the burner tank in the burner tank is not strong enough or distribution tube bad, the catalyst in the burner tank to stay a short period of time.
3, add CO additives, if you still can not eliminate the secondary combustion, according to the maximum temperature that the equipment can withstand and the condition of the smoke machine, as appropriate, cut off the main air, find the cause.
Baidu Encyclopedia - Secondary Combustion
Baidu Encyclopedia - Garbage Incinerator