Boiler low nitrogen transformation is a technology to reduce nitrogen oxides by reintroducing part of the boiler exhaust smoke into the furnace and mixing copper gas and air for combustion. This technology causes the combustion temperature in the core area of the boiler to decrease, the excess air coefficient remains unchanged, and the generation of ammonia oxide is inhibited without reducing the boiler efficiency, so as to achieve the purpose of reducing nitrogen oxide emissions.
In order to ensure the theoretical amount of air required for combustion, the fuel needs to be fully burned, and a certain amount of excess air needs to be supplied. Under the premise of ensuring the combustion thermal efficiency, a smaller excess air coefficient is taken to reduce the oxygen concentration in the flue gas as much as possible, which will effectively inhibit the generation of NOx.
What are the factors that affect the efficiency of low nitrogen boilers?
The main factors are:
1, heat loss
2. Incomplete fuel combustion and boiler scaling
3, exhaust temperature heat loss, etc.
Generally, the heat loss and boiler scaling after the transformation of the burner do not change compared with that before the transformation, and there is no impact on the thermal efficiency of the boiler. There are two main factors that change before and after the transformation of the burner, namely, the heat loss of the exhaust temperature and the incomplete combustion degree of the fuel.
Post time: Jan-02-2024