This article mainly introduces several combustion methods used by the Riello burner of the gas boiler, so that everyone can have a judgment when choosing a burner and a gas boiler.
Gas-fired boilers generally adopt combustion methods such as diffusion combustion, fully premixed combustion and flameless combustion.
1. Diffusion combustion
Diffusion combustion refers not to premixing, but to the diffusion of fuel gas at the nozzle and then combustion.
Advantages: This method of combustion does not require pre-mixing, but diffuses the gas at the nozzle mouth, and then burns it. The development of the combustion method is relatively simple to analyze, and the flame is relatively systematic and stable.
Disadvantages: Due to the long flame, it is easy to produce incomplete combustion, and more carbon monoxide and nitrogen oxides will be produced, which is not conducive to the full utilization of boiler fuel, is not conducive to the improvement of boiler thermal efficiency, and is difficult to meet boiler emission standards.
2. Fully premixed combustion method
Complete premixed combustion is to pre-combust the mixture of natural gas and air, and then send the mixture into the combustion chamber for combustion.
Advantages: premixed air and gas, multi-radiator heat transfer, improved heat transfer intensity. The advantage of using this combustion method is that the combustion flame is clearer and the thermal efficiency is higher.
Disadvantages: The combustion premixing ratio needs to be precise, the combustion reaction rate is fast, and the combustion is uniform to give full play to radiation heat transfer.
3. Flameless combustion
A combustion method in which the space before combustion in a gas boiler is uniformly mixed with gas. When using this method, it is not necessary to obtain the oxygen required for the combustion process in the surrounding air, and it only needs to be mixed with air to reach the combustion zone to achieve instantaneous combustion.
When choosing a burner, it is necessary to compare the advantages and disadvantages of different combustion methods. A good combustion method is also conducive to the boiler to achieve full combustion, improve thermal efficiency and reduce emissions. Therefore, it is very important to choose carefully.
This article mainly introduces several combustion methods used by the Riello burner of the gas boiler, so that everyone can have a judgment when choosing a burner and a gas boiler.
Gas-fired boilers generally adopt combustion methods such as diffusion combustion, fully premixed combustion and flameless combustion.
1. Diffusion combustion
Diffusion combustion refers not to premixing, but to the diffusion of fuel gas at the nozzle and then combustion.
Advantages: This method of combustion does not require pre-mixing, but diffuses the gas at the nozzle mouth, and then burns it. The development of the combustion method is relatively simple to analyze, and the flame is relatively systematic and stable.
Disadvantages: Due to the long flame, it is easy to produce incomplete combustion, and more carbon monoxide and nitrogen oxides will be produced, which is not conducive to the full utilization of boiler fuel, is not conducive to the improvement of boiler thermal efficiency, and is difficult to meet boiler emission standards.
2. Fully premixed combustion method
Complete premixed combustion is to pre-combust the mixture of natural gas and air, and then send the mixture into the combustion chamber for combustion.
Advantages: premixed air and gas, multi-radiator heat transfer, improved heat transfer intensity. The advantage of using this combustion method is that the combustion flame is clearer and the thermal efficiency is higher.
Disadvantages: The combustion premixing ratio needs to be precise, the combustion reaction rate is fast, and the combustion is uniform to give full play to radiation heat transfer.
3. Flameless combustion
A combustion method in which the space before combustion in a gas boiler is uniformly mixed with gas. When using this method, it is not necessary to obtain the oxygen required for the combustion process in the surrounding air, and it only needs to be mixed with air to reach the combustion zone to achieve instantaneous combustion.
When choosing a burner, it is necessary to compare the advantages and disadvantages of different combustion methods. A good combustion method is also conducive to the boiler to achieve full combustion, improve thermal efficiency and reduce emissions. Therefore, it is very important to choose carefully.