Analysis of the pollution emission system of large-scale combustion of biomass briquette fuel in China

In order to realize the sustainable development strategy and reduce the air pollution caused by biomass boiler emissions, the current study added a Selective Catalyst Reduction (SCR) external denitration system and a wet electrostatic precipitator to the original three-stage dust removal system for biomass briquetting fuel boiler emissions and completed the upgrading of the five-stage dust removal system. Taking the soot concentration, Sulfur dioxide (SO2) concentration, and Nitrogen oxides (NOX) concentration in the flue gas as the evaluation indicators, real-time online monitoring of the operating conditions of the system is carried out. The results show that the average concentration of smoke and dust in the flue gas discharged from the five-stage dust removal system is 3.47 mg/m(3), with 2.49 mg/m3 for the average concentration of SO2, and 25.48 mg/m3 for the average concentration of NOX. The removal rates of soot, SO2, and NOX have increased by 5.8%, 4%, and 48.5%, respectively, which are much lower than the emission standards of biomass boiler flue gas pollutants. The innovation of this system is unprecedented for the large-scale combustion of biomass briquettes in China, which greatly reduces the emission of harmful gases. This upgrading will not only make a certain contribution to environmental protection but also provide a theoretical basis to the biomass briquette fuel industry.

Automated summary

To achieve sustainable development and reduce air pollution from biomass boiler emissions, a study upgraded the three-stage dust removal system for biomass briquetting fuel by adding a Selective Catalyst Reduction (SCR) external denitration system and a wet electrostatic precipitator, resulting in a five-stage dust removal system. Real-time online monitoring of the system's operating conditions was conducted using soot concentration, sulfur dioxide (SO2) concentration, and nitrogen oxides (NOX) concentration as evaluation indicators. The results showed that the five-stage dust removal system had an average smoke and dust concentration of 3.47 mg/m³, an average SO2 concentration of 2.49 mg/m³, and an average NOX concentration of 25.48 mg/m³. The removal rates of soot, SO2, and NOX increased by 5.8%, 4%, and 48.5%, respectively, which were significantly lower than the emission standards. This innovative system greatly reduces harmful gas emissions from large-scale biomass briquette combustion in China and contributes to environmental protection while providing a theoretical basis for the biomass briquette fuel industry.