Principle of flue gas reflux from 30mg low-nitrogen burner
Writer： admin Time：2021-11-15 16:24 Browse：℃
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In the production and operation activities of low-nitrogen burners, the normal operation of the burners is the basis for ensuring the output of industrial production capacity. Among them, the flue gas recirculation in the low-nitrogen burners is the main operation to ensure 30mg low-nitrogen emission. Let us come together. Understand.
Oxygen content in low-nitrogen burners is an important measure to reduce pollutants. The flue gas oxygen content is an important parameter for calculating the emission concentration of boiler pollutants. Effective control of the flue gas oxygen content during operation is an important measure for whether the boiler pollutant emission can meet the standard. The essential. The oxygen content of the flue gas is one of the important monitoring parameters for the operation of the boiler and an important basis for reflecting the perfection of the combustion equipment and the boiler. Factors such as equipment sealing conditions are related.
The smaller the oxygen content, that is, the smaller the excess air coefficient, it indicates that the chemical incomplete combustion heat loss and the mechanical incomplete combustion heat loss increase; the greater the oxygen content, that is, the greater the excess air coefficient, it indicates that the amount of air fed is too large. Excessive air causes the furnace temperature to drop, which not only affects combustion, but also takes away a large amount of heat and dust, which increases the calculation result of pollution emission concentration. At the same time, the large air volume also increases the power consumption of smoke exhaust. Controlling the oxygen content of the flue gas is very important for controlling the combustion process and achieving safety and low pollution emissions.
In actual production, it is difficult to control the oxygen content in the flue gas below 6%. Generally, the excess air coefficient in the furnace required for burning bituminous coal and anthracite is about 1.5, that is, the oxygen content of the flue gas is controlled at 6% to 8% is used as the economic operation index of the chain boiler, which can not only reduce the heat loss of exhaust gas, improve the thermal efficiency of the boiler, but also better control the boiler air pollutant emission, and play an active role in protecting and improving the regional ambient air quality. .
To sum up the control of the flue gas oxygen content in the combustion process, the boiler flue gas oxygen content is the main indicator to measure whether the combustion process is economical. The flue gas oxygen content is controlled by changing the air-fuel ratio to control the oxygen content within the range. The main control method is the coordinated control of the fuel volume and the air supply volume. The key to flue gas oxygen content control is to have an oxygen analyzer with better dynamic characteristics and stable and reliable operation.
The above is an introduction to the principle of 30mg low-nitrogen burner flue gas return. If you want to know other content of low-nitrogen burner, please pay attention to Zhengzhou Bona Thermal Energy Equipment Co., Ltd.!