Light gas burner classification, system, reach a principle.

Light gas burner

1. The classifies burner burning gas type of burner burning gas is very much, classify a method also each are not identical, the character that should classify a method to mirror burner in the round with a kind is more difficult. Introduce a few kinds of commonly used classification methods now:

(1) presses combustion method classification

1) diffuses type burner: The air that combustion place wants not beforehand with light gas to mix, 1=0; of primary air coefficient

Burner of 2) air type: The partial air that combustion place wants beforehand with light gas to mix, 0.8; of ～ of 1=0.2 of primary air coefficient

3) mixes type burner completely beforehand: All air that combustion place wants beforehand with light gas to mix adequately, 1=1.05~1.10 of one of second wind coefficient.

(2) presses classification of airy supply method

1) brings burner ejaculation type: Air is lighted to enrage efflux attracts a person or burn gas by air efflux inspiratory;

2) nature offers wind burner: The negative pressure in relying on the chamber of a stove or furnace air inspiratory organization burns;

Burner of 3) blast type: Send the organization inside person furnace combustion air with blast equipment.

(3) presses fuel classification

1) is pure burner burning gas: Be confined to light with burn gas

2) burns gas - fuel combines burner: But at the same time or light alone with burn gas or fuel

3) burns gas - coal fines combines burner: But at the same time or light alone with light gas or coal fines

(4) presses special function classification

Burner of 1) immersion type

Burner of 2) high speed

3) pulse burner

Burner of 4) low NOx

2. The technology of burner burning gas asks different device, different technology is right burner burning gas has diverse demand. In gas fired boiler, to the technology of burner the requirement basically has the following sides:

(1) falls in rated pressure burning gas, burner can achieve the forehead to decide force;

(The appearance of 2) blaze and dimension should match with photograph of dimension of structure of the chamber of a stove or furnace, due and good blaze degree of filling;

(3) has good adjustment characteristic, when in boiler small negative charge moves to high load capacity, combustion operating mode should be stabilized, namely bigger adjustment is compared; Adjust than =1: 5

(4) combustion efficiency is tall, combustion contaminant is discharged amount to mark;

(Compact, installation manipulates 5) structure convenient, adjust agile, noise is little.

3.3 industry of § our country of burner of commonly used oil gas lights boiler the burner that gas industry boiler uses basically is entrance product, come from different area, and it is a model with burner of power all alone. Although the brand of burner is very much, but its composition is basic and identical, because they observe uniform European standard. This section with relatively extensive Germany is being used on home market burner of power all alone is exemple, the structural type of burner of commonly used to industrial boiler oil gas and trend of its technology development undertake introductory.

§ the structure of burner of commonly used oil gas can divide boiler of 3.3.1 commonly used structural type industry to be carried for fuel roughly, air is carried, fuel - air mixes reach ignition system, fuel - air linkage adjusts reach safety to protect these 5 systems.

(The fuel that 2) burns gas to light gas burner carries a system to be strung together by group of a group of a powerful person form, include a powerful person of ball valve, filter, stabilized voltage, electromagnetism a powerful person, butterfly a powerful person to wait normally.

2. Air carries a system

Air carries a system to drive coaxial blast impeller and air channel composition by burner fan motor normally. In burner of large fission type, still can use independent fan according to equipment requirement and carry air through special air channel,

3. Fuel - air mixes reach ignition system fuel - air mixes reach ignition system, have decisive effect to the each combustion index of burner. Fuel and airy mix stand or fall to be able to affect the ignition of blaze and stability directly; The stability of ignition system concerns equipment whether begin smoothly to move, make to the safety of equipment appliance has great sense.

4, fuel - air linkage regulating system

Oil gas burner is in what the fuel inside whole power limits and air measure to cooperate be linkage adjustment, when bear changes, synchronism has empty tolerance and the change that fuel measures, when its cooperate to be debugged in burner, through flue gas the method such as the analysis gives setting.

5. Safe protection system

Have like accumulation inside oil gas boiler many can burn gas (if produce leak burning gas or fuel to evaporate inside the chamber of a stove or furnace of high temperature,make oil gas) reach explosion limit, deflagrate with respect to meeting generation when ignition, cause great menace to the moving safety of oil gas boiler.

So-called explosion limit is to point to to burn gas or kindling is encountered to be able to produce concentration of high speed combustion after fuel steam and air mix (point to bulk chroma commonly) limits. The low cost of this limits calls lower explosion limit, high cost calls upper explosion limit. Usually, the explosion limit of natural gas is 3%~15% ; Jiao Lu is gas it is 5%~36% ; The liquefied petroleum gas is 1.6%~11.1% . Explosion limit range is bigger, lower explosion limit jumps over low fuel morale, sex of its explosion danger is bigger. To prevent fuel gas leak enters the chamber of a stove or furnace to cause safe hidden trouble, all install on burner have the safe protection system such as protector of corresponding automatic ignition program, flameout. Normally, oil gas burner all has one before ignition Duan Qianchui sweeps time, before igniting electric arc arises namely, burner fan is swept to there is to blow inside the chamber of a stove or furnace process. In this one process, still can remain the likelihood in interior of the chamber of a stove or furnace can light aeriform eduction the chamber of a stove or furnace beyond, avoid deflagrated happening thereby. In addition, in moving process of oil gas burner, if once produce blaze,go out but fuel is carried still be in continual circumstance, also can make accumulation of interior of the chamber of a stove or furnace removes many combustible (burn gas or oil gas) , create risk. Accordingly, oil gas burner all has blaze to monitor a system to use protection system, break what burner stops instantly when fire to move namely. Graph 3-15 place is shown is two kinds of more commonly used blaze methods that monitor. The presence that can determine blaze through ionization law or ultraviolet detection algorithm.