The working characteristic of low nitrogen burner introduces

From the point of generation mechanism of nitrogen, fuel / the mastery of a skill or technique of nitrogen of gas boiler control is main also with a view to two direction: Drop combustion blaze temperature and next deoxydization content. Consequently, a when generate when restrain nitrogen important step is from burner proceed with. So what is low nitrogen burner? What is its principle?

Low nitrogen burner is the burner with small discharge capacity of the nitrogen in pointing to fuel combustion process. Is the nitrogen with general burner of traditional natural gas boiler discharged in 120~150mg/m? Or so. And is the nitrogen with low nitrogen general burner discharged in 30~80 Mg/m? the left and right sides. Is nitrogen discharged in 30 Mg/m? The following call commonly exceed low nitrogen burner.

Burner of low now nitrogen can divide roughly by the principle it is the following kinds:

1) level burner

The level burner that according to classificationing combustion principle plans, make fuel and air section mix combustion, because combustion violates theoretical equivalent to compare, reason can drop of nitrogen generate.

2) oneself recycle burner

One kind is the pressure head that uses combustion air, absorb partial combustion flue gas, enter burner, mix combustion with air. Because of flue gas recycle, the thermal capacity of combustion flue gas is large, combustion temperature drops, nitrogen decreases.

Burner of recycle of another kind of oneself is a partial flue gas enter recycle inside burner directly, attend combustion course, this kind of burner has restrain oxidation nitrogen and energy-saving two action.

3) shade burner

Its principle is to make one part fuel has made thick combustion, another part fuel has made weak combustion, but empty tolerance keeps changeless on whole. Because two parts are in,violate chemical equivalent to compare next combustion, nitrogen is very consequently low, this kind of combustion is called again violate combustion or be not chemical equivalent combustion.

4) break up blaze burner

Its principle is divide a blaze into several small blaze, because small blaze comes loose hot area is large, blaze temperature is inferior, make " hot resonant NO " drop somewhat. In addition, blaze is small shortened the gas such as oxygen, nitrogen the retention period in blaze, right " hot resonant NO " and " fuel NO " have the inhibition that showing.

5) mix promote model burner

Flue gas is in high temperature area retention period is one of main factors that affect nitrogen to make an amount, improve combustion and airy to mix, can make the ply of blaze face is decreased thin, in combustion bear changeless circumstance falls, flue gas is in blaze face namely the retention period inside high temperature area shortens, make consequently of nitrogen generate a quantity to drop. Mix promote model burner plans according to this kind of principle.

6) burner of low nitrogen precombustion chamber

Precombustion chamber is a kind of when come to our country nearly 10 years develop research efficient, low nitrogen classifications combustion mastery of a skill or technique, precombustion chamber is general by wind (or 2 wind) wait for composition with fuel spray system, fuel and wind mix quickly, inside precombustion chamber primary combustion area forms rich fuel mixture, because anoxic, it is partial fuel undertakes burning only, fuel is mixed in deficient oxygen the separate out inside the blaze area with blaze inferior temperature evaporates cent, reduced nitrogen consequently generate.

Essence of any mastery of a skill or technique of combustion of a kind of low nitrogen are the technical ability that has tubal accusing to combustion process. According to low nitrogen burner development of 20 years uses experience, industrial boiler wants to last truly reliable low nitrogen burns, just be replaced or transforming burner is no good apparently, still need to accuse equipment to undertake upgrading to combustion canal.