JPS5833366Y2 - gas burner - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a burner that generates low nitrogen oxides.

When hydrocarbon fuels are combusted in air, a large amount of nitrogen oxides are generated, and various methods are known to suppress this.The present invention has two methods that are extremely effective: the concentrated combustion method and the split combustion method. This is embodied in the burner itself so that it can be achieved, and the details of the figure are as follows.

Reference numeral 1 denotes a cylindrical charcoal combustion chamber, and a plurality of auxiliary combustion chambers 2 are formed on the downstream outer side thereof.

The charcoal grilling chamber 1 is constructed by installing a flame stabilizer 3 on its upstream side, and by installing the flame stabilizer 3, a slit portion is formed on the outer periphery of the flame stabilizer 3 to communicate with the charcoal grilling chamber 1. 4, the slit portion 4 communicates with the gas chamber 5 and the air chamber 6 on the upstream side thereof, and the auxiliary combustion chamber 2 communicates with the gas chamber 5 and the air chamber through a communication path 7 having a smaller diameter. The chambers 6 are communicated with each other so that air-rich combustion is performed in the charcoal combustion chamber 1 and fuel-rich combustion is performed in the auxiliary combustion chamber 2 at the same time.

Thus, the air introduced into the air chamber 6 is distributed and flows into the slit portion 4 and the communication path 7 according to its flow resistance.

At this time, by appropriately determining the area of the gas ejection holes 8, an air-fuel mixture with excess air is formed in the slit portion 4 and a fuel-excess mixture is formed in the communication passage 7.

Since the slit portion 4 and the communication path 7 have a sufficiently long distance compared to the slit width and the communication path diameter, after sufficient mixing,
- The charcoal reaches the charcoal grilling chamber 1 and the auxiliary combustion chamber 2 and starts combustion, respectively.

In such combustion, - Since charcoal grilling is an air-excess combustion, the flame temperature does not reach a high temperature, that is, dilution combustion takes place;
The generation of nitrogen oxides can be suppressed to low levels.

In addition, in the auxiliary combustion chamber 2, fuel-rich combustion is performed in a divided state, so the flame does not reach a high temperature and no local high-temperature areas are generated, so the generation of nitrogen oxides is minimized. becomes.

Thereafter, the flames in the charcoal grilling chamber 1 and the auxiliary combustion chamber 2 gradually mix and react, and the combustion as a whole is completed.

Therefore, no high-temperature zone is generated in this process, and the level of nitrogen oxides generated can be kept low even in the final, ie, secondary combustion stage.

Additionally, the notch 9 provided on the downstream side of the charcoal grilling chamber 1 ensures good flame transfer between the combustion in the primary combustion chamber 1 and the combustion in the auxiliary combustion chamber 2, and maintains good combustion stability. It is for.

As described above, the present invention creates two types of premixtures, one with excess air and one with excessively rich combustion.By making each passage narrow or long and narrow, sufficient mixing can be achieved while preventing backfire. The present invention provides an excellent burner that suppresses the generation of nitrogen oxides to a low level by performing premixed concentrated combustion, divided combustion, and even staged combustion.

[Brief explanation of drawings]

The drawings show one embodiment, and FIG. 1 is an explanatory front view, and FIG. 2 is an explanatory cross-sectional view taken along the line A-A. Code: 1...Charcoal grilling chamber, 2...Sub-combustion chamber, 3...Flame stabilizer, 4...Slit portion, 5... ...Gas chamber, 6...Air chamber, 7
...Communication path, 8...Gas outlet, 9.
...Notch.

Claims (1)

[Scope of utility model registration request] A plurality of auxiliary combustion chambers are configured on the outer side of the downstream side of the cylindrical charcoal grilling chamber, and the charcoal grilling chamber is configured by installing a flame stabilizer on the upstream side thereof, and is maintained by installing the flame stabilizer. forming a slit portion communicating with the charcoal grilling chamber on the outer periphery of the flame body;
The slit portion communicates with a gas chamber and an air chamber through a gas injection hole on its upstream side, and the sub-combustion chamber communicates with a communication passage having a smaller diameter than the slit portion, and the communication passage communicates with a communication passage through a gas injection hole. A gas burner communicated with the gas chamber and the air chamber so as to carry out air-rich combustion in the charcoal combustion chamber and simultaneously carry out fuel-rich combustion in the sub-combustion chamber.