Minimum feeding rate of activated carbon to control dioxin emissions from a large-scale municipal solid waste incinerator.
To obtain a minimum feeding rate (F(min)) of activated carbon (AC), a series of measurements on dioxin emission concentration were carried out in a large-scale municipal solid waste incinerator. It was found that dioxin removal efficiency (eta) increased with an increase in AC feeding concentration. This had an almost linear function to F/Q when F/Q was less than 65 g/Nm(3), where F was the AC feeding rate (mg/min), and Q was the volumetric flow rate of flue gas (Nm(3)/min). However, it did not seem to be affected by F/Q, when F/Q was larger than 150 mg/Nm(3). On the basis of the experimental data obtained in this study, the removal efficiency of dioxins by the application of AC could be correlated as eta (%)=100/[1.0+(40.2/(F/Q)(3))]. It is valid in appropriate conditions (F/Q=10-300 mg/Nm(3)) suggested by the study with a statistical error of +/-18%. The correlation would be applied to estimate the dioxin removal efficiency (eta) using the F/Q value. For engineering applications, the (F/Q)(min) could be solved using a graphic illustration method, by which the minimum feeding rate (F) was obtained if the flue gas volumetric flow rate (Q) was known.
Chang
Yu-Min
YM
Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 3, Section 1, Chung-Shiao E. Road, Taipei, Taiwan. ymchang@ntut.edu.tw
Hung
Chao-Yang
CY
Chen
Jyh-Herng
JH
Chang
Chang-Tang
CT
Chen
Chin-Ho
CH
D000327:Adsorption; D000393:Air Pollutants; D000397:Air Pollution / Q000517:prevention & control*; D002244:Carbon / Q000737:chemistry*; D004147:Dioxins / Q000737:chemistry*; D004784:Environmental Monitoring / Q000379:methods; D004785:Environmental Pollutants; D004867:Equipment Design; D005740:Gases; D017745:Incineration / Q000379:methods; D015233:Models, Statistical; D012037:Refuse Disposal / Q000379:methods; D013696:Temperature; D013997:Time Factors
D000393:Air Pollutants; D004147:Dioxins; D004785:Environmental Pollutants; D005740:Gases; D002244:Carbon