The mechanisms of sulfur capturing during coal briquette combustion was discussed. Various factors affecting sulfur removal efficiency have been studied. Characterization of the slag left after combustion has been ca...The mechanisms of sulfur capturing during coal briquette combustion was discussed. Various factors affecting sulfur removal efficiency have been studied. Characterization of the slag left after combustion has been carried out by using X ray diffraction (XRD), Messbauer spectroscopy (MS), scanning electron microscopy (SEM), energy dispersion X ray analysis (EDAX), and electron spectroscopy for chemical analysis (ESCA). No other sulfur containing species besides CaSO 4 was found. Small amount of CaFe 3(SiO 4) 2OH, some complexes of CaO SiO 2 Fe 2O 3 and vitreous iron oxides were identified on the surface of CaSO 4 grains. This might explain the mechanism of sulfur fixation during coal briquettes combustion.展开更多
The desulfurization technology during coal combustion in furnace has been a competitive choice for middle and small industrial boilers to meet the environmental protection requirements,with the advantage of low cost a...The desulfurization technology during coal combustion in furnace has been a competitive choice for middle and small industrial boilers to meet the environmental protection requirements,with the advantage of low cost and convenient operation.The ordinary calcium-based sorbents such as limestone and calcium carbide residue have low desulfurization efficiency during coal combustion because of CaSO 4 decomposition.The sulphation product BaSO 4 which don’t decompose until 1580?℃ has much better thermal stability than CaSO 4 which rapidly decompose at about 1300?℃.A new type of barium-based sorbent with high desulfurization efficiency was developed.ZCS intelligent sulfur determination analyzer was used to study sulfur capture mechanism during the high temperature combustion process of coal.In addition the dynamic sulfur capture process of the mixture of barium-based sorbent and calcium-based sorbent was studied in detail.Industrial grate furnace experiment revealed that the desulfurization efficiency of barium-based sorbents could reach 35.5%, which is higher than 13.88% of calcium-based sorbent.It implied that the desulfurization effect of barium salt was much better than calcium salt during coal combustion at about 1200～1300?℃.展开更多
文摘The mechanisms of sulfur capturing during coal briquette combustion was discussed. Various factors affecting sulfur removal efficiency have been studied. Characterization of the slag left after combustion has been carried out by using X ray diffraction (XRD), Messbauer spectroscopy (MS), scanning electron microscopy (SEM), energy dispersion X ray analysis (EDAX), and electron spectroscopy for chemical analysis (ESCA). No other sulfur containing species besides CaSO 4 was found. Small amount of CaFe 3(SiO 4) 2OH, some complexes of CaO SiO 2 Fe 2O 3 and vitreous iron oxides were identified on the surface of CaSO 4 grains. This might explain the mechanism of sulfur fixation during coal briquettes combustion.
文摘The desulfurization technology during coal combustion in furnace has been a competitive choice for middle and small industrial boilers to meet the environmental protection requirements,with the advantage of low cost and convenient operation.The ordinary calcium-based sorbents such as limestone and calcium carbide residue have low desulfurization efficiency during coal combustion because of CaSO 4 decomposition.The sulphation product BaSO 4 which don’t decompose until 1580?℃ has much better thermal stability than CaSO 4 which rapidly decompose at about 1300?℃.A new type of barium-based sorbent with high desulfurization efficiency was developed.ZCS intelligent sulfur determination analyzer was used to study sulfur capture mechanism during the high temperature combustion process of coal.In addition the dynamic sulfur capture process of the mixture of barium-based sorbent and calcium-based sorbent was studied in detail.Industrial grate furnace experiment revealed that the desulfurization efficiency of barium-based sorbents could reach 35.5%, which is higher than 13.88% of calcium-based sorbent.It implied that the desulfurization effect of barium salt was much better than calcium salt during coal combustion at about 1200～1300?℃.
