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Changing characteristics of PM initial emission factors for layer soft coal-fired boilers |
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Abstract The influences of boiler output(W), excess air coefficient(a), coal ash content(w(A)) on particulate matter(PM) initial emission factors in coal combustion were analyzed by statistical analysis method and SPSS13.0 using PM actual test data and coal analysis data from 95 medium and small layer soft coal-fired boilers, actual capacity of boilers£70 MW. The changing characteristics of PM initial emission factors was also studied. The results indicated the PM initial emission factors EF0C, EF0H, and EF0A based on fuel consumption, coal lower heating value and coal ash content were not related with W under the condition of boiler loads380%, and EF0C, EF0H increased slightly with a and w(A) increasing. Moreover, EF0A decreased with w(A) increasing. The orders from strong to weak of three influencing factors were w(A)> a> W for EF0C, w(A)> a> W for EF0H, and w(A)> a> W for EF0A respectively.
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Received: 15 May 2010
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