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What are the main classifications of natural gas low-nitrogen burners?

Writer: admin Time:2021-11-16 16:07 Browse:

What are the main classifications of natural gas low-nitrogen burners?
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  Main classification
   1. Heavy oil burner, gas burner and dual fuel burner (light oil/gas or heavy oil/gas).
   2. According to the operation and operation mode, it is divided into: Ou Ruite burner has one-stage, two-stage, progressive two-stage and progressive two-stage with proportional regulator (the latter implements proportional adjustment operation)
  3. Industrial burner series: All are high-power burners, designed for special industrial applications.
  4. Classification based on combustion technology to reduce NOx
  The burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures the stable combustion of fuel and fuel combustion. Therefore, to suppress the production of NOx, it is necessary to start with the burner. According to the combustion technology to reduce NOx, low NOx burners are roughly divided into the following categories:
   stage burner
  The stage burner designed according to the principle of staged combustion makes the fuel and air mixed and combusted in stages. Because the combustion deviates from the theoretical equivalent ratio, it can reduce the generation of NOx.
   self-recirculating burner
   One is to use the pressure head of the combustion-supporting air to suck back part of the combustion flue gas, enter the burner, and mix and burn with the air. Due to the recirculation of the flue gas, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx is reduced. Another type of self-recirculating burner is to recirculate part of the flue gas directly in the burner and add it to the combustion process. This kind of burner has the dual effects of suppressing nitrogen oxides and energy saving.
   dense and light burner
  The principle is to make a part of the fuel burned richly, and the other part of the fuel burned too lightly, but the overall air volume remains the same. Since both parts are combusted under deviating stoichiometric ratio, NOx is very low. This kind of combustion is also called deviated combustion or non-stoichiometric combustion.
   split flame type burner
  The principle is to divide a flame into several small flames. Due to the large heat dissipation area of ​​the small flames, the flame temperature is lower, which reduces the "thermal reaction NO". In addition, the 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".
The residence time of the flue gas in the high temperature zone is one of the main factors that affect the amount of NOx generated. The improvement of the mixing of combustion and air can reduce the thickness of the flame surface. Under the condition of the combustion load unchanged, the flue gas will be at a high temperature on the flame surface. The staying time in the zone is shortened, thus reducing the amount of NOx generated. The mixing-promoting burner is designed according to this principle.
  The above is an introduction to the main categories of natural gas low-nitrogen burners compiled for you. If you want to know other content of low-nitrogen burners, please pay attention to Zhengzhou Bona Thermal Energy Equipment Co., Ltd.!