| 基于低位发热量的燃气锅炉基准烟气量核算方法研究 |
| Study on the Accounting Method of Flue Gas Volume from Gas-Fired Boilers Based on the Lower Heating Value |
| 投稿时间：2023-10-07 修订日期：2024-03-05 |
| DOI：10.19316/j.issn.1002-6002.2025.04.19 |
| 中文关键词: 低位发热量 燃气锅炉 基准烟气量 核算方法 |
| 英文关键词:lower heating value gas-fired boilers benchmark flue gas volume accounting method |
| 基金项目:北京市自然科学基金资助项目(8232031);国家自然科学基金资助项目(42207516);北京市生态环境保护科学研究院纵向科研项目(JZ2023-005);能源基金会资助项目(G-2310-35204);北京市西城区优秀人才培养项目(202030) |
| 作者 | 单位 | | 燕潇 | 北京市生态环境保护科学研究院, 北京 100037
国家城市环境污染控制工程技术研究中心, 北京 100037 | | 赵亚笛 | 北京市生态环境保护科学研究院, 北京 100037
国家城市环境污染控制工程技术研究中心, 北京 100037 | | 刘晓 | 北京市生态环境保护科学研究院, 北京 100037
国家城市环境污染控制工程技术研究中心, 北京 100037 | | 宋光武* | 北京市生态环境保护科学研究院, 北京 100037
国家城市环境污染控制工程技术研究中心, 北京 100037 | | 孙成一 | 北京市生态环境保护科学研究院, 北京 100037
国家城市环境污染控制工程技术研究中心, 北京 100037 | | 齐立涛 | 北京市延庆区生态环境局, 北京 102199 |
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| 通讯作者:宋光武* 北京市生态环境保护科学研究院, 北京 100037;国家城市环境污染控制工程技术研究中心, 北京 100037 |
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| 中文摘要: |
| 烟气量是核算燃气锅炉污染物排放量的关键参数,但目前常规的烟气量核算方法存在一定的局限性。基于燃料的低位发热量,推导并建立了一种简洁实用的基准烟气量计算公式。研究结果表明,该方法的核算结果具有较高的精度和可靠性,相对误差均值在0.9%~3.8%之间。不同类型燃气的基准烟气量系数主要受可燃组分含量的影响,且其变化趋势与低位发热量一致,均随可燃组分含量的增加而升高。各类燃气按基准烟气量系数的排序为天然气＞焦炉煤气＞转炉煤气＞高炉煤气。进一步分析发现,天然气低位发热量与甲烷(CH4)含量呈负相关性,与其他碳氢化合物含量呈正相关,主要归因于其他烷烃组分的低位发热量普遍高于CH4,CH4含量增加通常伴随着其他碳氢组分含量的降低,从而导致整体低位发热量下降。高炉煤气和转炉煤气的低位发热量则均与一氧化碳(CO)含量呈正相关,与氮气(N2)含量呈负相关。该基准烟气量计算公式采用了现行《锅炉大气污染物排放标准》(GB 13271—2014)中的烟气含氧量折算基准,不受实测过量空气系数的影响。该方法具有公式简洁、操作方便、数据可追溯、逻辑清晰等优点,可在现场条件受限的情况下,结合常规监测数据快速估算污染物排放量,适用于年度排放量、实时排放量及减排量等多种核算情景,具有广泛的应用前景与推广价值。 |
| 英文摘要: |
| Flue gas volume is a key parameter for calculating pollutant emissions from gas-fired boilers,but conventional calculation methods currently have certain limitations in application.In this study,a concise and practical formula for calculating benchmark flue gas volume is derived and established based on the lower heating value (LHV) of the fuel.The results show that the proposed method achieves a mean relative error ranging from 0.9% to 3.8%,indicating high accuracy and reliability.The benchmark flue gas volume coefficients for different types of gaseous fuels are primarily influenced by the content of combustible components,and their variation trend aligns with that of the LHV,both increasing with the rise in combustible content.The coefficients follow the order: natural gas > coke oven gas > converter gas > blast furnace gas.Further analysis reveals that for natural gas,the LHV is negatively correlated with methane (CH4) content but positively correlated with other hydrocarbon components,primarily due to the higher LHV of other alkanes compared to CH4.Thus,an increase in CH4 content is usually accompanied by a decrease in the content of other hydrocarbon components,thereby leading to a decline in the overall LHV.For blast furnace gas and converter gases,the LHV is positively correlated with carbon monoxide (CO) and negatively correlated with nitrogen (N2) content.The benchmark flue gas volume formula established in this study adopts the conversion benchmark of flue gas oxygen content in the current Emission Standard of Air Pollutants for Boiler (GB 13271-2014) and is not constrained by the measured excess air coefficient.Overall,this method offers advantages such as a concise formula,convenient operation,traceable data,and clear logic.It allows rapid estimation of pollutant emissions using readily available monitoring data under field constraints,making it suitable for a wide range of applications,including annual emissions,real-time emissions,and emission reduction assessments. |
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