Welcome to Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd!
Hotline::

News
Contact Us
Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd
Mobile Phone:15816882025
Fax:0755-28968949
Address: No. 2268, Longgang section, Longgang Avenue, Longgang District, Shenzhen
Types and functions of low nitrogen burners
- Categories:News
- Author:Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd.
- Origin:Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd.
- Time of issue:2021-06-19 16:04
- Views:
Types and functions of low nitrogen burners
Introduction of low-nitrogen burner: The burner is an important equipment on industrial oil-fired boilers and gas-fired boilers. It ensures the stable combustion of fuel and the complete combustion of fuel. Therefore, in order to suppress the generation of NOx, we must start from the burner. According to the combustion technology for reducing NOx, low NOx burners are broadly 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. Since the combustion deviates from the theoretical equivalence ratio, the generation of NOx can be reduced.
Self-recirculating burner
One is to use the pressure head of the combustion air to suck back part of the combustion flue gas, enter the burner, and mix and burn with the air. Due to flue gas recirculation, the heat capacity of the combustion flue gas is large, the combustion temperature is lowered, and the NOx is reduced.
Another 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 saving energy.
Concentration burner
The principle is to make part of the fuel burn too rich and the other part burn too lean, but the overall air volume remains unchanged. Since both parts are burned off-stoichiometric, the NOx is very low. This type of combustion is also known as off-stoichiometric or non-stoichiometric combustion.
Split flame burner
The principle is to divide a flame into several small flames. Due to the large heat dissipation area of the small flames and the lower flame temperature, the "thermal reaction NO" decreases. In addition, the small flame shortens the residence time of oxygen, nitrogen and other gases in the flame, and has obvious inhibitory effects on "thermal reaction NO" and "fuel NO".
Hybrid booster burner
The residence time of the flue gas in the high temperature area is one of the main factors affecting the amount of NOx generation. Improving the mixing of combustion and air can reduce the thickness of the flame surface. Under the condition of constant combustion load, the flue gas is at high temperature on the flame surface. The residence time in the zone is shortened, thereby reducing the amount of NOx generated. Mixing-promoting burners are designed according to this principle.
6. Low NOx pre-chamber burner
The pre-combustion chamber is a high-efficiency, low-NOx staged combustion technology developed and researched in China in the past 10 years. The pre-combustion chamber is generally composed of primary air (or secondary air) and a fuel injection system. The fuel and the primary air are rapidly mixed. A fuel-rich mixture is formed in the primary combustion zone in the pre-combustor. Due to lack of oxygen, only part of the fuel is burned, and the fuel precipitates volatiles in the primary flame zone with lean oxygen and lower flame temperature, thus reducing the generation of NOx.
Contact Us
mobile phone:15816882025
Fax:0755-28968949
E-mail:2843385065@qq.com
Web:www.szburners.com
Address: No. 2268, Longgang section, Longgang Avenue, Longgang District, Shenzhen

Website QR code
copyright © 2022 Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd SEO Tag 粤ICP备20006542号 Powered by www.300.cn