Abstract:

The emission of submicron particles from coal combustion has caused serious damage to the environment and human health.A novel submicron particle agglomeration technique was developed to control the emission of submicron particle.The submicron particles were agglomerated by an agglomerant solution which was sprayed into the inlet of electrostatic precipitator (ESP), thus, the agglomerated submicron particles could be captured by the dust collecting equipment.Systematic experiments of submicron particle agglomeration were conducted, and the influence factors including pH value, flow rate, and concentration of agglomerant solutions were analyzed.In addition, the influence of temperature and particles concentration in the simulated flue gas was also discussed.With the addition of the agglomerant solution, the particle emission concentration in flue gas decreased significantly.The submicron particles agglomeration technology whose cost is cheaper can control the emissions of submicron particles and decrease the opacity of flue gas obviously without changing the operation parameters of the ESP.The particle agglomeration technique is a useful and promising method to control the emission of submicron particles from coal combustion.