民用燃料烟气中气态污染物及水溶性无机离子的排放

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Abstract The typical biomass fuels (made of corn cob, corn stalks, soybean stalks, straw stalks, pine, chestnut branches, peach branches) and civil coal (bituminous coal, honeycomb coal) were selected in Beijing to carry out simulated combustion experiments in the laboratory. The whole-process online monitoring of NO_x, SO₂ and CO in flue gas was carried out using Thermo Fisher 42i chemiluminescence NO-NO₂-NO_x analyzer, 43i pulsed fluorescence SO₂ analyzer and 48i CO analyzer. The particle samples were collected and the water-soluble inorganic ions in the particles of different particle sizes were measured by ICS 90A and ICS2000ion chromatograph. The results showed that the average emission factors of SO₂ from three kinds of civil fuels were civil coal > fuelwood > straw; CO emission factors were straw > civil coal > fuelwood; and NO_x emission factors were fuelwood > Civil coal > straw.The content of SO₄^2- in PM_2.5 of firewood combustion is the highest, accounting for 22%~30% of the total water-soluble ions. K⁺ takes an absolute advantage in the composition of water-soluble ions in PM_2.5 of straw, accounting for 36%~49% of the total water-soluble ions. Among the three types of civil fuels, straw combustion has the highest emission factor of water-soluble inorganic ions, followed by fuelwood fuel and civil coal. Nine kinds of water-soluble inorganic ions (Na⁺, K⁺, Mg²⁺, Ca²⁺, NH₄⁺, F^-, Cl^-, NO₃^-, SO₄^2-) were analyzed in this experiment. The emission factors of Na⁺, K⁺, NH₄⁺, F^-from firewood combustion are the largest in the the range of 0~2.5μm, while those of Mg²⁺ and Ca²⁺ are the largest in the in the range of 2.5~10μm. Except Ca²⁺, Mg ²⁺, the emission factors of other ions from straw fuels reached the maximum in the range of 0~2.5μm particle size. For bituminous coal, except K⁺, Mg²⁺ and Ca²⁺, the emission factors of other ions reach the maximum in the particle size range of 0~2.5μm. The emission factors of Na⁺, K⁺, Cl^-, NO₃^-, SO₄^2-in honeycomb coal reach the maximum in the range of 0~2.5μm particle size.

Key words： civil fuels gaseous pollutants water-soluble inorganic ions

Received: 15 January 2019

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X51

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	LIU Ya-nan
	ZHONG Lian-hong
	HAN Li-hui
	YAN Jing

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LIU Ya-nan,ZHONG Lian-hong,HAN Li-hui等. Emission of gaseous pollutants and water-soluble inorganic ions from civil fuel flue gas[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(8): 3225-3232.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I8/3225

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