Experimental Study on Demercurization Performance of Wet Flue Gas Desulfurization System

The demercurization performance of wet flue gas desulfurization (WFGD) system was investigated by measuring mercury concentrations at the inlet and outlet of WFGD system with a QM201H mercury analyzer. The selected desulfurizer included NH_3·H_2O, NaOH, Na_2CO_3, Ca(OH)_2 and CaCO_3. The influences of adding oxidant and coagulant such as KMnO_4, Fenton reagent, K_2S_2O_8/CuSO_4 and Na_2S into desulfurization solutions were also studied.The results show that elemental mercury is the main component of gaseous mercury in coal-fired flue gas, and the proportion of oxidized mercury is less than 36%. Oxidized mercury could be removed by WFGD system efficiently,and the removal efficiency could amount to 81.1%-92.6%. However, the concentration of elemental mercury slightly increased at the outlet of WFGD as a result of its insolubility and re-emission. Therefore, the removal efficiency of gaseous mercury is only 13.3%-18.3%. The mercury removal efficiency of WFGD system increased with increasing the liquid-gas ratio. In addition, adding KMnO_4, Fenton reagent, K_2S_2O_8/CuSO_4 and Na_2S into desulfurization solutions could increase the mercury removal efficiency obviously. Various additives have different effects, and Na_2S is demonstrated to be the most efficient, in which a mercury removal efficiency of 67.2% can be reached.

作 者： BAO, Jingjing YANG, Linjun YAN, Jinpei   作者單位： School of Energy and Environment, Southeast University, Nanjing, Jiangsu 210096, China  刊 名： 中國(guó)化學(xué)（英文版）  SCI 英文刊名： CHINESE JOURNAL OF CHEMISTRY  年，卷(期)： 2009 27(11)  分類號(hào)： O6  關(guān)鍵詞： wet flue gas desulfurization system   mercury   valence state of mercury   removal   additive   oxidant  

【Experimental Study on Demercurizatio】相關(guān)文章：

Experimental study on Cr(Ⅵ) reduction by Pseudomonas aeruginosa04-25

An experimental study on the self-reference effect04-29

Experimental study on the simultaneous desulfurization and denitrification by duct injection04-25

Experimental study on combustion characteristics of municipal solid waste04-30

Experimental Study on Effects of Fuel Injection on Scramjet Combustor Performance04-30

Experimental study on the interaction of fine water mist with solid pool fires04-27

Experimental study on ultrasonic propagation in water-based bentonite slurry04-28

Experimental Study of Motion of Nitrogen Taylor Bubbles and Liquid Slugs in Inclined Tubes04-28

Indoor imitation experimental study on driving factors of rainfall-runoff process04-29

Experimental study on full-scale steel beam-to-column moment connections04-29