Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (4): 90-94.

• Materials Science & Technology • Previous Articles     Next Articles

Effect of Cement Calcination with Municipal Sewage Sludge on Nitrogen Oxide Emission

Zhang Ling-hui  Su Da-gen   

  1. School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-12-11 Revised:2011-12-28 Online:2012-04-25 Published:2012-03-01
  • Contact: 苏达根(1948-) ,男,教授,博士生导师,主要从事生态环境材料研究. E-mail: dgsu@scut.edu.cn E-mail:zlh@ jyu.edu.cn
  • About author:张灵辉(1974-) ,男,博士生,讲师,主要从事生态环境材料研究.
  • Supported by:

    国家自然科学基金资助项目( 20877027)

Abstract:

In this paper,the effect of cement calcination with municipal sewage sludge on the nitrogen oxide( NOx ) emission was investigated by means of XPS,DSC-TG and NOx monitoring. The results indicate that ( 1) two distinct exothermic peaks appear during the combustion of sewage sludge of which the volatiles and nitrogen contents are higher than those of coal; ( 2) the fuel-NOx produced by the combustion of sewage sludge in oxidizing atmosphere at 900℃ is less than that produced by the combustion of coal under the same conditions; ( 3) cement raw material accelerates the emission of fuel-NOx by the combustion of sewage sludge or coal in oxidizing atmosphere at 900 ℃; ( 3) the addition of sewage sludge in coal helps to reduce the emission of fuel-NOx; ( 4) dry sludge
with equal amount but higher moisture content helps to produce less fuel-NOx; and ( 5) comprehensively speaking,the appropriate moisture content of sewage sludge is about 10%.

Key words: sewage sludge, cement, nitrogen oxides, calcination