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author:Xuanxuan 2019-11-12
Z burner is an important equipment of industrial furnace, which guarantees the stable ignition combustion of fuel and the complete combustion of fuel, so it is necessary to control the production of nitrogen oxide from the burner.What are the classification of low nox burners?We listen to the specific hebei Vivian technology professionals to specific introduction!
According to the combustion technology of reducing nox, low-nox burners can be roughly divided into the following categories:
1. Stage burner
The stage burner designed according to the principle of staged combustion can make fuel and air burn in stages.
2. Self-recirculating burner
One is to use the pressure head of combustion air to suck part of the combustion smoke back into the burner and mix it with the air for combustion.Because of the flue gas recirculation, the heat capacity of combustion flue gas is large, the combustion temperature is reduced and the nitrogen oxide is reduced.
Another kind of self-recirculating burner is to put some flue gas into recirculation directly in the burner and join the combustion process.
3. Shade burner
The principle is to make some of the fuel for too thick combustion, another part of the fuel for too light combustion, but the overall air volume above the same.Because both parts burn at stoichiometric ratios, the nox is very low, and this combustion is also called deviated combustion or non-stoichiometric combustion.
4. Split flame industrial burner
The principle is to divide a flame into several small flames, because the small flame heat dissipation area is large, the flame temperature is low, so that the "thermal reaction NO" decreased.In addition, small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has a significant inhibitory effect on "thermal reaction NO" and "fuel NO"
5. Mixed accelerator burner
The residence time of flue gas in the high temperature zone is one of the main factors affecting the production of nitric oxide. Improving the mixing of combustion and air can make the thickness of flame surface thinner.The mixed - boost burner is designed according to this principle.
6. Low nox precombustion chamber burner
Precombustion chamber development research in China in recent 10 years is a kind of high efficiency and grade of low nox combustion technology, generally speaking, a precombustion chamber of the wind or secondary air and fuel injection system, etc, the mixed fuel and a wind, in a form in the combustion zone precombustion indoor fuel mixture, due to the lack of oxygen, is only part of the fuel combustion, fuel in poor oxygen and low flame temperature of a flame volatile precipitation in the area, thereby reducing the production of nitric oxide.
For more information about combustion engine, please pay attention to wuxi shunmeng technology co., LTD.
Contact number: 0086-510-85169858
Website is: www.boiler-special-burner.com
Company address: building 48, henghua science and technology park, no.58 xiuxi road, wuxi city, jiangsu province, China