高爐焦爐氣經鼓風嘴噴吹之數值模擬

Numerical Simulation of Injection of Coke Oven Gas through Tuyere in Blast Furnace

吳鉉忠(Hsuan-Chung Wu) ； 陳冠宥(Kuan-Yu Chen) ； 林惠娟(Huey-Jiuan Lin)

《燃燒季刊》 120期 (2023/02) Pp. 29-37

https://doi.org/10.30041/CQ.202302_(120).0004

摘要

在各種工業製程透過低碳生產來減少二氧化碳排放已成為全球迫切必須面對之議題。高爐製程在降低二氧化碳排放方面，利用富氫氣體作為粉煤或焦炭的替代材料被認為是可行的方法之一。本研究採用數值模擬分析單一輔助燃料粉煤、焦爐氣與雙燃料粉煤＋焦爐氣等三個案例在高爐爐下部之燃燒行為。模擬結果顯示僅有粉煤噴吹時，點火燃燒位置與氧氣消耗主要在風徑區。當有焦爐氣注入時，在鼓風嘴內就開始產生燃燒而提高鼓風嘴溫度。此外，焦爐氣注入也造成熱風入口到鼓風嘴出口的壓差增加。因此，未來在高爐製程使用富氫氣體必須考量安全性與穩定性之議題。

關鍵字

焦爐氣噴吹 ； 粉煤噴吹 ； 高爐製程模擬

並列摘要

The reduction of carbon dioxide emissions through low-carbon production in various industrial processes has become a pressing global issue. Utilizing hydrogen-rich gas as a substitute for pulverized coal or coke in the blast furnace process is considered one of the feasible methods for reducing carbon dioxide emissions. This study uses numerical simulation to analyze the combustion behavior in the lower part of the blast furnace for three cases, including single auxiliary fuel coal, coke oven gas, and dual fuel coal plus coke oven gas. The simulation results show that when only pulverized coal is injected, the ignition and combustion position and the consumption of oxygen are mainly in the raceway. When coke oven gas is injected, combustion begins in the tuyere and increases the temperature of the tuyere. In addition, the injection of coke oven gas also increases the pressure difference from the blast inlet to the tuyere outlet. Therefore, the use of hydrogen-rich gas in future processes must take into account the issues of safety and stability.

並列關鍵字

Coke oven gas injection ； Pulverized coal injeciton ； Blast process simulation