[Emission Characteristics of Water-Soluble Ions in Fumes of Coal Fired Boilers in Beijing].
Huan Jing Ke Xue
; 36(6): 1966-74, 2015 Jun.
Article
de Zh
| MEDLINE
| ID: mdl-26387296
ABSTRACT
Selecting coal fired boilers with typical flue gas desulfurization and dust extraction systems in Beijing as the study objects, the issues and characteristics of the water-soluble ions in fumes of coal fired boilers and theirs influence factors were analyzed and evaluated. The maximum mass concentration of total water-soluble ions in fumes of coal fired boilers in Beijing was 51.240 mg x m(-3) in the benchmark fume oxygen content, the minimum was 7.186 mg x m(-3), and the issues of the water-soluble ions were uncorrelated with the fume moisture content. SO4(2-) was the primary characteristic water-soluble ion for desulfurization reaction, and the rate of contribution of SO4(2-) in total water-soluble ions ranged from 63.8% to 81.0%. F- was another characteristic water-soluble ion in fumes of thermal power plant, and the rate of contribution of F- in total water-soluble ions ranged from 22.2% to 32.5%. The fume purification technologies significantly influenced the issues and the emission characteristics of water-soluble ions in fumes of coal fired boilers. Na+ was a characteristic water-soluble ion for the desulfurizer NaOH, NH4+ and NO3+ were characteristic for the desulfurizer NH4HCO3, and Mg2+ was characteristic for the desulfurizer MgO, but the Ca2+ emission was not increased by addition of the desulfurizer CaO or CaCO3 The concentrations of NH4+ and NO3- in fumes of thermal power plant were lower than those in fumes of industrial or heating coal fired boilers. The form of water-soluble ions was significantly correlated with fume temperature. The most water-soluble ions were in superfine state at higher fume temperature and were not easily captured by the filter membrane.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Centrales énergétiques
/
Charbon
/
Polluants atmosphériques
Pays/Région comme sujet:
Asia
Langue:
Zh
Journal:
Huan Jing Ke Xue
Année:
2015
Type de document:
Article
Pays de publication:
CHINA
/
CN
/
REPUBLIC OF CHINA