First, there is no requirement for the structure of the boiler. The burner of the flue gas recirculation technology can only be applied to the three return boiler. And there are strict requirements for boiler hearth. If the furnace size does not match, or is not a three return boiler, the transformation can only reach 80 mg below. Even if the three return boiler with the same size is reconstructed on site, the amount of work is very large.

Two. Stable emissions, metal surface combustion technology can discharge emissions to about 15 mg. And it can be reached at all times. But the exhaust emissions of the flue gas recirculation technology can be adjusted to about 25 mg at most, and exceed the standard in various working conditions.

Three. The fully premixed surface combustion technology has low noise when the burner is running. The combustion machine of flue gas recirculation and flue gas recirculation technology runs with great noise.

Four. The burner of all premixed metal surface combustion technology can guarantee that the output of the boiler is equal or even slightly larger than that of any boiler that has been transformed. The burner of the flue gas recirculation technology will reduce the output of the original boiler by 10% to 25% on the modified boiler.

Five. The low nitrogen burner of fully premixed surface combustion technology has been proven to be in mature use time in Western Europe for about 20 years, and the burners of the flue gas recycling technology have been developed in nearly three years. The stability needs to be verified in time.