Low-NOx combustion engines suppress the formation of nitrogen oxides (NOx) by optimizing the temperature and concentration fields during combustion. Core implementation methods include: staged combustion (introducing air or fuel in stages to reduce localized high temperatures), flue gas recirculation (recirculating exhaust gas to dilute the oxygen concentration and reduce flame temperature), and fuel premixing (ensuring thorough and uniform mixing of fuel and air to avoid localized high-temperature zones).
Core Technologies of Low-NOx Combustion Engines
Low-NOx combustion engines aim to reduce NOx formation caused by the high-temperature, oxygen-rich environment during combustion, primarily through the following technological pathways:
Staged Combustion Technology:
Air Staged Introducing: Introducing the air required for combustion in stages. Providing less air in the initial stage of combustion slows the combustion rate and reduces peak temperature, followed by the introduction of the remaining air to ensure complete combustion.
Fuel Staged Injection: Injecting fuel into the combustion zone in batches, suppressing NOx formation by creating localized lean or rich combustion environments.
Flue Gas Recirculation (FGR):
Reintroducing some of the low-temperature flue gas after combustion back into the combustion chamber and mixing it with the combustion air. This not only dilutes the oxygen concentration but also absorbs combustion heat, effectively reducing flame temperature and decreasing thermal NOx emissions at the source.
Premixed Combustion Technology:
This technology ensures a thorough and uniform mixture of fuel and air before combustion. By controlling the premixing ratio, it ensures a uniform flame and eliminates localized high-temperature "hot spots" within the combustion zone, thereby significantly reducing NOx emissions.
Structural Optimization and Flame Segmentation:
By designing multiple small fuel nozzles, the main flame is divided into multiple smaller flames (lean/rich flames). By improving flame structure and shortening flame length, combustion efficiency is enhanced and pollution is suppressed.
These technologies are often used in combination and are customized according to specific industrial or civil needs to minimize nitrogen oxide emissions while maintaining combustion efficiency.
Low-NOx combustion engines suppress the formation of nitrogen oxides (NOx) by optimizing the temperature and concentration fields during combustion. Core implementation methods include: staged combustion (introducing air or fuel in stages to reduce localized high temperatures), flue gas recirculation (recirculating exhaust gas to dilute the oxygen concentration and reduce flame temperature), and fuel premixing (ensuring thorough and uniform mixing of fuel and air to avoid localized high-temperature zones).
Core Technologies of Low-NOx Combustion Engines
Low-NOx combustion engines aim to reduce NOx formation caused by the high-temperature, oxygen-rich environment during combustion, primarily through the following technological pathways:
Staged Combustion Technology:
Air Staged Introducing: Introducing the air required for combustion in stages. Providing less air in the initial stage of combustion slows the combustion rate and reduces peak temperature, followed by the introduction of the remaining air to ensure complete combustion.
Fuel Staged Injection: Injecting fuel into the combustion zone in batches, suppressing NOx formation by creating localized lean or rich combustion environments.
Flue Gas Recirculation (FGR):
Reintroducing some of the low-temperature flue gas after combustion back into the combustion chamber and mixing it with the combustion air. This not only dilutes the oxygen concentration but also absorbs combustion heat, effectively reducing flame temperature and decreasing thermal NOx emissions at the source.
Premixed Combustion Technology:
This technology ensures a thorough and uniform mixture of fuel and air before combustion. By controlling the premixing ratio, it ensures a uniform flame and eliminates localized high-temperature "hot spots" within the combustion zone, thereby significantly reducing NOx emissions.
Structural Optimization and Flame Segmentation:
By designing multiple small fuel nozzles, the main flame is divided into multiple smaller flames (lean/rich flames). By improving flame structure and shortening flame length, combustion efficiency is enhanced and pollution is suppressed.
These technologies are often used in combination and are customized according to specific industrial or civil needs to minimize nitrogen oxide emissions while maintaining combustion efficiency.