What is the working principle of low nitrogen burner

Low NOx burner reachs burner of low nitrogen oxide, it is the burner with small discharge capacity of the NOx in pointing to fuel combustion process, choose low NOx burner to be able to drop of oxide of the nitrogen in combustion process discharge. The oxide of the nitrogen that produces in combustion process is principal for NO and NO2, connect the oxide of these two kinds of nitrogen commonly call azotic oxide NOx. A lot of test results make clear, the azotic oxide that burner discharges is principal for NO, occupy about equably 95% , and NO2 is occupied only 5% the left and right sides.

The NO that place of general fuel combustion generates is principal come from two respects: It is combustion place uses air (combustion air) in oxidation; of nitrogen 2 it is the place in fuel contain nitride to be in combustion process pyrolysis oxidizes again. In most burner, former the principal source that is NO, we call this kind of NO " hot reaction NO " , latter says for " fuel NO " , still have additionally " twinkling sends NO " . It is OK that the place when combustion forms NO with the atom that contain nitrogen central product reaction makes NO reductive into NO2. React besides these on practice outside, NO is OK still with all sorts of containing nitrification content generates NO2. In carrying out burner reaction reachs chemical equilibrium when, [NO2]/[NO] portion is very small, namely NO change is NO2 very few, negligible. Drop the NOx of combustion mastery of a skill or technique of NOx happens by combustion, and combustion method and combustion condition are right of NOx generate have bigger effect, can drop consequently through improving combustion technical ability NOx, its are principal the approach is as follows: Choose the fuel with N inferior content, include fuel to take off nitrogen and change to drop into; of low nitrogen fuel air is superfluous coefficient, had organized thick combustion, will drop the chroma; of oxygen is all round fuel below the state of affairs with little excess air, degree of peak value drops in temperature below in order to cut down " hot reaction NO " ; in oxygen chroma inferior circumstance falls, the time that adds combustible to stay in the peak before blaze and response division. Cut down NOx form and discharge the specific method that uses commonly to be: Classification combustion, recrudescent burn combustion of law, low oxygen, shade error combustion and flue gas recycle to wait.