Generalflame® Low Nox emission burner
To meet environment emissions regulations of different countries, we design our low NOx burners, which still maintain high levels of combustion efficiency and performance.
The special designed low nox burner is widely used in different industries, like power generations, chemical disposal, as well as building materials....
low nitrogen burner performance & efficiency
A. flue gas emission index:
NOX: ≤ 50 mg/m3
Smoke blackness: level 1 (Ringelman)
Others meet local standards:
B. Fuel and air regulation ratio is 1:6 to ensure normal combustion;
C. The technical performance of the burner is reliable, and the flame length and diffusion angle can be reasonably matched with the chamber space to ensure safe and stable operation;
D. Combustion noise is lower than 80dB (1 meter away);
E. The burner can meet the requirements of the long-term low-load operation of the boiler;
The right is temperature & Nox concentration distribution
Low nitrogen burner structure
Double-regulated air structure (graded air supply)
Burner adopts two levels of air supply: primary and secondary air.The primary air is spiral flow (adjust the length and rigidity of the flame - accounting for 30% of the total air);The secondary air is axial flow (70% of the total air).
Multi-lance structure (fractional combustion)
Can adopt multi-lance layout, with internal and external annular distribution, the injection hole is a porous structure（about 4-8 holes）, so that the combustion flame center temperature can be reduced after the gas injection.Liquid fuel goes through the central channel.
An anoxic zone is formed during the initial stage of combustion to minimize the formation of N0x, but at the same time to provide adequate oxygen to maintain the stability of the flame.
Improve fuel retention time and temperature levels in fuel enrichment areas to minimize NOX production.Increase the retention time of fuel particles in fuel enrichment area reduces the tendency of nitrogen oxide formation in coke particles.
Strong ability of axial flow nozzle to sweep the secondary air, timely replenish the excess air to ensure full burnout.
Design a flexible and adjustable nozzle with low resistance and high efficiency through CFD technology.Using cross jet technology, low resistance high pressure nozzle, low pressure honeycomb rotary nozzle, adjustable cyclone (cyclone angle can change up to 5°-65°), and combined with precision processing technology, the fuel burnout problem caused by fractional combustion is solved, the combustion efficiency is improved, and the formation of NOX is reduced.
Adopt flue gas furnace circulation technology
The burner body is inserted into the furnace for 200mm, and then eject through the burner in the furnace to form a negative pressure zone and mix a certain amount of flue gas in the furnace.
Center section streamline and velocity distribution Flue-gas recirculation technology
Adopt flue gas circulation technology outside furnace
A hot flue gas of 150 degrees is introduced into the combustion air from the chimney to reduce the oxygen content of the combustion air, slow down the combustion speed, control the core temperature of the flame and reduce nitrogen oxide emissions.(rotary kiln and other similar furnaces are not suitable for this process
Stratified combustion
The center fuel adopts oxygen-rich and peroxic combustion to reduce the flame combustion temperature. Add fuel at the outer layer, and poor mixed again with low oxygen concentration of flue gas for mixture combustion.
Low nOx burner layout panel
A fire viewing hole, ignition hole and fire inspection hole are reserved on the shell panel of the burner.
The burner is equipped with an integrated flame monitoring system, which can realize flame monitoring. It is installed on the outer plate of the burner and equipped with a cooling air connection. The cooling air comes from a forced fan.
Reasonable position between igniter, pilot burner and fire detection probe.
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