Recently, customers always call us to ask what is a low-nitrogen burner, what are the types of burners and what are the important indicators for choosing a low-nitrogen burner? To this end, our technicians gave answers and some suggestions.
1. What is a low nitrogen burner?
The low-nitrogen burner is to reduce the temperature of the burner through technical means, so that the nitrogen oxides discharged by the boiler can be controlled within a certain range, so as to achieve the purpose of pollution control and emission reduction.
Second, the type of low nitrogen burner?
Premixed surface burners (target < 30mg/Nm3)
Ultra-low nitrogen burner (diffusion graded LLNB, target < 80mg/Nm3)
Flue gas recirculation low nitrogen burner (FGR-LNB, target < 30mg/Nm3)
3. What are the precautions for transformation?
1. The low-nitrogen transformation of gas-fired boilers must adhere to "one boiler, one policy"
The low-nitrogen transformation of gas-fired boilers is to achieve low-nitrogen emissions through the adaptive design adjustment of the burner system (including the flue gas system) without changing the boiler structure and system conditions. Facing: different furnace types (WNS, SZS, DZS, furnace volume, geometric shape, size); different capacity; boiler body structure and flue gas resistance; site layout and available terrain; natural gas pressure, calorific value; climate conditions, Different situations such as the way of air entering the phoenix. Even similar boiler rooms still have differences in heating load and adjustment methods. It must be "one furnace, one policy".
2. The low-nitrogen transformation of gas-fired boilers is by no means a simple replacement of the burner is a systematic project
To achieve the expected goals, we must achieve comprehensive optimization of technology, design, commissioning, and operation and maintenance.
4. How to judge the effect after the transformation is completed?
1. Stable up to the standard is the fundamental requirement for low nitrogen transformation
Emissions in all working conditions meet the standards stably, and the performance of low-nitrogen emissions does not attenuate.
2. Safety and reliability are the prerequisites for transformation
3. Compared with before the transformation, the owner is most concerned about the least drop in thermal efficiency of operation
Especially the flue gas recirculation transformation method, because the flue gas backflow will reduce the temperature level of the furnace, delay the combustion process, reduce the heat transfer temperature and pressure of the heating surface, and the boiler exhaust gas temperature will increase slightly, which will reduce the boiler efficiency.
4. No condensed water or reliable discharge
5. No new vibration source is formed, and the noise is low.
6. Control coordination. The burner does not form a load control linkage
7. The lowest growth in installed capacity (power consumption)
8. The price is reasonable.
5. Who will transform?
The user unit is the main body, the implementation of the burner enterprise, and the cooperation of the boiler factory.
Recently, customers always call us to ask what is a low-nitrogen burner, what are the types of burners and what are the important indicators for choosing a low-nitrogen burner? To this end, our technicians gave answers and some suggestions.
1. What is a low nitrogen burner?
The low-nitrogen burner is to reduce the temperature of the burner through technical means, so that the nitrogen oxides discharged by the boiler can be controlled within a certain range, so as to achieve the purpose of pollution control and emission reduction.
Second, the type of low nitrogen burner?
Premixed surface burners (target < 30mg/Nm3)
Ultra-low nitrogen burner (diffusion graded LLNB, target < 80mg/Nm3)
Flue gas recirculation low nitrogen burner (FGR-LNB, target < 30mg/Nm3)
3. What are the precautions for transformation?
1. The low-nitrogen transformation of gas-fired boilers must adhere to "one boiler, one policy"
The low-nitrogen transformation of gas-fired boilers is to achieve low-nitrogen emissions through the adaptive design adjustment of the burner system (including the flue gas system) without changing the boiler structure and system conditions. Facing: different furnace types (WNS, SZS, DZS, furnace volume, geometric shape, size); different capacity; boiler body structure and flue gas resistance; site layout and available terrain; natural gas pressure, calorific value; climate conditions, Different situations such as the way of air entering the phoenix. Even similar boiler rooms still have differences in heating load and adjustment methods. It must be "one furnace, one policy".
2. The low-nitrogen transformation of gas-fired boilers is by no means a simple replacement of the burner is a systematic project
To achieve the expected goals, we must achieve comprehensive optimization of technology, design, commissioning, and operation and maintenance.
4. How to judge the effect after the transformation is completed?
1. Stable up to the standard is the fundamental requirement for low nitrogen transformation
Emissions in all working conditions meet the standards stably, and the performance of low-nitrogen emissions does not attenuate.
2. Safety and reliability are the prerequisites for transformation
3. Compared with before the transformation, the owner is most concerned about the least drop in thermal efficiency of operation
Especially the flue gas recirculation transformation method, because the flue gas backflow will reduce the temperature level of the furnace, delay the combustion process, reduce the heat transfer temperature and pressure of the heating surface, and the boiler exhaust gas temperature will increase slightly, which will reduce the boiler efficiency.
4. No condensed water or reliable discharge
5. No new vibration source is formed, and the noise is low.
6. Control coordination. The burner does not form a load control linkage
7. The lowest growth in installed capacity (power consumption)
8. The price is reasonable.
5. Who will transform?
The user unit is the main body, the implementation of the burner enterprise, and the cooperation of the boiler factory.