Establishment of refined sintering flue gas recirculation patterns for gas pollutant reduction and waste heat recycling
| Autor: | Xiaohui Fan, Guojing Wong, Ji Zhiyun, Xuling Chen, Yu Zhiyuan, Gan Min |
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| Rok vydání: | 2019 |
| Předmět: |
Pollutant
Flue gas Waste management Renewable Energy Sustainability and the Environment business.industry 020209 energy Strategy and Management Gaseous pollutants 05 social sciences Sintering 02 engineering and technology Industrial and Manufacturing Engineering Steelmaking Waste heat 050501 criminology 0202 electrical engineering electronic engineering information engineering Environmental science Gas composition business NOx 0505 law General Environmental Science |
| Zdroj: | Journal of Cleaner Production. 235:1549-1558 |
| ISSN: | 0959-6526 |
| Popis: | Emission of gaseous pollutants from sintering accounts for 40% of the total emitted from ironmaking & steelmaking processes. Flue gas recirculation (FGR) is a functional way to reduce gas emission and reuse the waste heat of flue gas. Traditional FGR modes characterized low cycling ratio or worsened sintering indexes. In this paper, the flue gas compositions of each wind-box in sintering machine was measured. Based on the flue gas composition characteristics, these wind-boxes were partitioned into five regions to simplify the selection process of selective circulation. Main influence factors on sintering indexes of FGR were researched through sintering pot test. Methods of recirculating gas composition calculating and refined circulation modes establishing were proposed. Under the condition of suitable gas compositions and temperature for recirculation, including O2 ≥ 18%, H2O(g) ≤ 8%, SO2 ≤ 500 ppm, and T ≥ 200 °C, four feasible refined recirculation modes were obtained. Highest cycling ratio among these four applicable ways can reach 41.9% and reduce the emission of NOx and SO2 by 28.6% and 8.15%, respectively. Purpose of improving the cycling ratio without deteriorating sintering indexes was realized. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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