YONGING
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Biomass Chain Grate Stoker
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Biomass Boiler Emission Standards:
NOx < 50mg/m control methods and low nitrogen emission technologies for biomass boilers. Research has been conducted by relevant departments on the hazards of NOx, the generation mechanism of NOx during coal-fired power generation combustion, and technologies to reduce NOx. Reducing NOx is an inevitable requirement for improving air quality.
NOx control methods can be divided into pre-combustion treatment, in-combustion treatment, and post-combustion treatment. Pre-combustion denitrification refers to converting fuel into low-nitrogen fuel, which is technically complex, difficult, and costly, thus currently in the research stage; in-combustion denitrification mainly includes: first, the formation of NOx during combustion, and second, the reduction of already formed NOx; post-combustion denitrification mainly refers to flue gas denitrification: including selective catalytic reduction, selective non-catalytic reduction, etc.
John Energy-saving Boiler Structure Diagram, the high-temperature gasification boiler uses sealed feeding technology + (water-cooled grate + reciprocating grate technology) + adiabatic combustion technology + NOx high-temperature reduction technology to solve the NOx emission problem.
1. By adopting the above technologies, the original NOx emissions can generally be controlled within 200mg/m3, and using urea water reduction can directly achieve below 50mg/m3.
2. Key to controlling NOx emissions: first, control the synthesis of NOx, and second, control the reduction of already formed NOx to N2. Controlling the synthesis amount mainly involves controlling the excess air in the combustion chamber; lower excess air results in less NOx formation.
3. Sealed feeding technology, water-cooled grate + reciprocating grate are all aimed at controlling the excess air in the combustion chamber and reducing the damage of high-temperature air to the grate, with the hope of achieving a lower maintenance rate.
4. Regarding NOx high-temperature air reduction technology: since the main component of NOx in flue gas is NO, and N2 decomposes into NO at 650℃, the main work of denitrification is to remove NO. NO reacts with reducing gases such as CO, H2, CH4 at temperatures above 850℃ to be reduced to N2.
High-temperature gasification biomass boiler utilizes high-temperature air combustion technology and adiabatic combustion technology to increase the flue gas temperature. We set up a carbon monoxide generation zone in the combustion chamber, using CO to react with NO, reducing NO to N2, aiming to curb the generation of nitrogen oxides. John Energy-saving biomass boiler meets the requirements for low carbon and environmental protection.
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