Burner accessories are essential parts of the burner, which not only determine the quality of the burner, but also help the burner to achieve better results. Next, I will introduce the low-nitrogen burner.
Friends who often use burners, do you know what a low-nitrogen burner is? Maybe many friends don't know this problem, or what are the effects of low-nitrogen burners on boiler combustion? Let's listen to the professional explanation of the boiler burner accessories manufacturer. The main factors affecting are the design of the boiler and the quality of the coal used. Through combustion adjustment, secondary air ratio, and SOFA air ratio, the steam temperature parameters of some plants have basically reached the design value, and the fly ash combustibles have been significantly reduced. After the low-nitrogen burner is transformed, the change in the temperature field in the furnace will have a greater impact on the flue gas temperature and steam temperature characteristics at the furnace outlet.
Burner accessories determine the low-nitrogen burner, which is mainly manifested in the following two aspects: Purely from the perspective of combustion, after the boiler is transformed with air-staged low-nitrogen combustion technology, the combustion is delayed, the flame moves up in the middle, the flue gas temperature at the furnace outlet rises, and the superheated steam temperature and reheated steam temperature of the boiler rise. After the boiler adopts the technical transformation of air-staged low-nitrogen burner, the temperature of the main combustion zone drops more, and the temperature distribution in the furnace is more uniform. The pollution and slagging of the water wall will be greatly improved. The heat absorption of the water wall in the furnace increases, the furnace outlet temperature decreases, and the superheated steam temperature and boiler reheated steam temperature decrease. The change of steam temperature characteristics after the low-combustion transformation of the boiler by the boiler burner manufacturer is mainly affected by the above two factors. Which factors affect it mainly depends on the design of the boiler and the combustion of coal. Judging from the operation of air-staged low-nitrogen burners in various plants, with the design coal type, as the separated burnout air volume increases, the excess air coefficient in the main combustion zone decreases, and the temperature rise of the superheater and the temperature rise of the reheater increase significantly.
In addition to the above characteristics, the low-nitrogen burner has many details that are worth pondering and deliberating. While bringing benefits, high efficiency, energy saving and environmental protection to the enterprise, it is more conducive to long-term development. The stage burner designed according to the principle of staged combustion allows the fuel and air to be mixed and burned in stages. Since the combustion deviates from the theoretical equivalent ratio, the generation of nitrogen can be reduced.
Low nitrogen pre-combustion chamber burner. The pre-combustion chamber is a high-efficiency, low-nitrogen staged combustion technology developed and researched in my country 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 primary air are quickly mixed to form a fuel-rich mixture in the primary combustion zone of the pre-combustion chamber. Due to lack of oxygen, only part of the fuel is burned, and the fuel precipitates volatiles in the low flame area with low oxygen and flame temperature, thereby reducing the formation of NOx.
Burner accessories are essential parts of the burner, which not only determine the quality of the burner, but also help the burner to achieve better results. Next, I will introduce the low-nitrogen burner.
Friends who often use burners, do you know what a low-nitrogen burner is? Maybe many friends don't know this problem, or what are the effects of low-nitrogen burners on boiler combustion? Let's listen to the professional explanation of the boiler burner accessories manufacturer. The main factors affecting are the design of the boiler and the quality of the coal used. Through combustion adjustment, secondary air ratio, and SOFA air ratio, the steam temperature parameters of some plants have basically reached the design value, and the fly ash combustibles have been significantly reduced. After the low-nitrogen burner is transformed, the change in the temperature field in the furnace will have a greater impact on the flue gas temperature and steam temperature characteristics at the furnace outlet.
Burner accessories determine the low-nitrogen burner, which is mainly manifested in the following two aspects: Purely from the perspective of combustion, after the boiler is transformed with air-staged low-nitrogen combustion technology, the combustion is delayed, the flame moves up in the middle, the flue gas temperature at the furnace outlet rises, and the superheated steam temperature and reheated steam temperature of the boiler rise. After the boiler adopts the technical transformation of air-staged low-nitrogen burner, the temperature of the main combustion zone drops more, and the temperature distribution in the furnace is more uniform. The pollution and slagging of the water wall will be greatly improved. The heat absorption of the water wall in the furnace increases, the furnace outlet temperature decreases, and the superheated steam temperature and boiler reheated steam temperature decrease. The change of steam temperature characteristics after the low-combustion transformation of the boiler by the boiler burner manufacturer is mainly affected by the above two factors. Which factors affect it mainly depends on the design of the boiler and the combustion of coal. Judging from the operation of air-staged low-nitrogen burners in various plants, with the design coal type, as the separated burnout air volume increases, the excess air coefficient in the main combustion zone decreases, and the temperature rise of the superheater and the temperature rise of the reheater increase significantly.
In addition to the above characteristics, the low-nitrogen burner has many details that are worth pondering and deliberating. While bringing benefits, high efficiency, energy saving and environmental protection to the enterprise, it is more conducive to long-term development. The stage burner designed according to the principle of staged combustion allows the fuel and air to be mixed and burned in stages. Since the combustion deviates from the theoretical equivalent ratio, the generation of nitrogen can be reduced.
Low nitrogen pre-combustion chamber burner. The pre-combustion chamber is a high-efficiency, low-nitrogen staged combustion technology developed and researched in my country 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 primary air are quickly mixed to form a fuel-rich mixture in the primary combustion zone of the pre-combustion chamber. Due to lack of oxygen, only part of the fuel is burned, and the fuel precipitates volatiles in the low flame area with low oxygen and flame temperature, thereby reducing the formation of NOx.