Flue Gas Composition and Treatment Potential of a Waste Incineration Plant

Applied Sciences

Abdallah Nassour¹  Michael Nelles¹  Qahtan Thabit¹ 

[1] Department of Waste and Resource Management, Faculty of Agricultural and Environmental Sciences, University of Rostock, D-18059 Rostock, Germany;

关键词: waste incineration;    flue gas emissions;    climate change;    energy content;   

DOI  :  10.3390/app12105236

来源: DOAJ

【 摘 要 】

Waste-to-energy (WtE) incineration is an important technique in waste management systems and waste hierarchy. It is used to treat approximately 63% of the waste in European countries. The flue gas volumetric rate and its composition are essential to determine and monitor the emissions from waste incineration plants. This paper presents two methodologies used to evaluate the emissions from incinerators during the design phase. The first consists of a set of equations applicable in Excel (calculation model), while the second is the built-in components in Ebsilon 13.2 software which simulates the emissions from a furnace. This paper also proposes a comprehensive flue gas cleaning system for a simulated waste incineration plant in Jordan. According to Ebsilon, the results showed that for a 25 kg/s loading rate, there was 258,514 mg/Nm³, 749.90 mg/Nm³, 890.20 mg/Nm³, and 717 mg/Nm³ of CO₂, NO₂, SO₂, and HCL, respectively. It was noted that these values relate to 1.5 of excess air ratio, where the effect of excess air ratio as the main driver for any combustion process was examined. The calculation method (set of equations) evaluated the flue gas volumetric rate, the CO₂ emissions, and N₂O and SO₂ levels. Ebsilon allows for simulation of the treatment stages and calculates the amount of materials required. Selective non-catalytic reduction (SNCR) (a built-in component in the Ebsilon library) was used to treat the NO₂ emissions. For 1.5 of excess air ratio, those emissions were reduced from 749 mg/Nm³ to 180 mg/Nm³, while the Ca(OH)₂ injector used to treat the SO₂ and HCL emissions reduced emissions from 890.20 mg/Nm³ and 717 mg/Nm³ to 44 mg/Nm³ and 7.16 mg/Nm³, respectively. Regarding the reduction in CO₂, the spherical carbon absorption concept was simulated using 9.4 kg/s of carbon which was adequate to verify a 91% reduction rate of CO₂. Furthermore, the calculation model was validated and approved as a valuable model to predict the flue gas volume, the oxygen required, and flue gas emissions at the design stage.

【 授权许可】

Unknown