Low nitrogen transformation method for gas boiler burners

Low nitrogen transformation method for gas boiler burners
Natural gas boiler is the most widely used boiler product after coal-fired boiler, and it is also the mainstream product at present. Gas refers to natural gas, liquefied gas, gas, and biogas in the combustion process. Natural gas boiler is widely used, so people call it natural gas boiler. According to the new Environmental Protection Law, air pollution equipment should be supervised, pollutant emissions should be strictly restricted, blue water and blue sky projects should be implemented, and the use of biomass formed fuels or natural gas is recommended. Governments at all levels will take corresponding measures to implement the plan to transform coal-fired boilers into gas boilers. Natural gas is a clean fuel that burns well and produces lower ash, sulfur, and nitrogen content than coal. At the same time, transporting gas fuel through pipelines can greatly reduce labor intensity, improve working conditions, and lower operating costs. The implementation of national projects such as the West East Gas Pipeline has provided high-quality, sufficient, and inexpensive gas sources for the transformation of coal-fired boilers into gas boiler burners.The nitrogen oxide content in exhaust emissions from gas boilers is above 150 milligrams per cubic meter, while the standard is below 80mg or 30mg. A low nitrogen gas boiler with a concentration of 80mg is called a low nitrogen gas boiler, while a concentration below 30mg is called an ultra-low nitrogen gas boiler.How to carry out low nitrogen transformation for ordinary gas boilers?1、 Change the main body to the boiler main body, that is, the boiler main body. We improve the furnace and heating area to make the combustion of gas boilers more complete, further reducing the nitrogen oxide content in the flue gas, and ultimately achieving the goal of low nitrogen gas transformation.2、 The method of low nitrogen transformation for gas boilers generally focuses on burner transformation, replacing low nitrogen burners to make their performance more energy-efficient, environmentally friendly, and efficient, thereby reducing the nitrogen oxide content in boiler exhaust. It is usually divided into low nitrogen burners and ultra-low nitrogen combustion. The renovation methods for low nitrogen burners in gas boilers include:1. Using the pressure head of the combustion air, a portion of the burned flue gas is sucked back into the burner and mixed with air for combustion, forming flue gas recirculation. Due to the recirculation of flue gas, the heat capacity of combustion flue gas is large, the combustion temperature decreases, and the nitrogen oxide content decreases. Another type of self recirculation burner is to directly feed some flue gas into the burner and add it to the combustion process. This type of burner has a dual effect of environmental protection and energy conservation.2. Full premixed burner (surface combustion) Full premixed combustion technology is the first advanced gas combustion technology in the world, which fully premixes combustion gas and air before entering the combustion chamber, making combustion more complete, improving combustion efficiency, reducing harmful gas emissions, and reducing the space requirements of the combustion chamber.The low nitrogen transformation methods for gas boilers are mostly the above two. The commonly used method is the low nitrogen transformation of the burner, which is usually suitable for small gas boiler products. The low nitrogen transformation of large gas boilers requires the furnace and burner to be carried out simultaneously, and the boiler body and burner are matched to work efficiently.