What is low nitrogen combustion technology(1)
Low nitrogen combustion technology
I. air fractional combustion
thermal oil furnace burner
Air fractional combustion technology is one of the low NOx combustion technologies widely used at home and abroad.Shanxi blue sky environmental protection equipment co. LTD. Lang fenge said.
1. Basic principle the air needed for fuel combustion is divided into two or more stages and sent to the furnace, so that the combustion process of coal can be completed in stages on the basis of keeping the overall excess air coefficient unchanged:
1) * phase is fuel rich combustion, make < 1, 70 ~ 80% of the total air required for combustion will be sent from the main combustion area, to ensure fuel combustion in the anoxic condition, build reducing atmosphere, and inhibit the generation of fuel NOx;
2) the second stage is oxygen-rich combustion. The remaining air (burnout wind) is sent to the furnace chamber from the burnout zone above the main combustion zone to complete the burnout process of pulverized coal.Although there is a large amount of air in the burnout zone, some NOx will be generated again, but overall NOx production in the furnace is reduced.
thermal oil furnace burner
2. Factors affecting NOx reduction by air fractional combustion:
1) excessive air coefficient distribution of two-stage combustion;
2) combustion temperature;
3) residence time, etc.
※ air fractional combustion shall prevent slagging and corrosion in the fuel-rich combustion zone
thermal oil furnace burner
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