Sulfur fate during bituminous coal combustion in an oxy-fired circulating fluidized bed combustor

被引：24

作者：

Duan, Lunbo ^{[1
]}

Zhou, Wu ^{[1
]}

Li, Haixin ^{[1
]}

Chen, Xiaoping ^{[1
]}

Zhao, Changsui ^{[1
]}

机构：

[1] Southeast Univ, Thermoenergy Engn Res Inst, Nanjing 210096, Peoples R China

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2011年 / 28卷 / 09期

关键词：

Oxy-fuel Combustion; CFB; SO2; Emission; Desulfurization Efficiency; SO2; CO2; EMISSIONS; LIMESTONE; NOX;

D O I：

10.1007/s11814-011-0057-x

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

To clarify the sulfur transformation behavior during oxy-fired circulating fluidized bed (CFB) combustion, experiments on SO2 emission characteristics were carried out in a 50 kWth CFB combustor. Results show that SO2 emission is quite dependent on the bed temperature in different atmospheres without limestone injection. With Ca/S=2.5, SO2 emission in 21%O-2/79%CO2 atmosphere is smaller than that in air atmosphere, but SO2 emission decreases with the increase of O-2 concentration. The calcium forms in the ash prove the combination of calcination/carbonation and direct sulfation mechanism of limestone under oxy-combustion conditions. And the desulfurization efficiency of limestone (as deducting the self-retention efficiency from the total sulfur removal efficiency) increases from 40% to 52% as the O-2 concentration increases from 21% to 40%.

引用

页码：1952 / 1955

页数：4

共 22 条

[1]

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