洁净煤技术

2020, v.26;No.128(04) 182-189

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火电企业CO_2排放在线监测系统的研发应用
Research and application of on-line monitoring system for CO_2 emissions from thermal power enterprises

李峥辉;卢伟业;庞晓坤;李运泉;白凯杰;李越胜;卢志民;姚顺春;
LI Zhenghui;LU Weiye;PANG Xiaokun;LI Yunquan;BAI Kaijie;LI Yuesheng;LU Zhimin;YAO Shunchun;School of Power,South China University of Technology;Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion;Shunde Inspection Institute of Special Equipment Inspection and Research Institute of Guangdong Province;Foshan Shunde Wusha Thermal Power Co.,Ltd.;

摘要(Abstract):

碳交易机制高效运行的重要基础是客观、准确且具有公信力的碳排放数据,而现有温室气体排放核算方法普遍采用排放因子法,存在准确度不高、数据收集效率较低、时效性严重滞后等问题。与排放因子法相比,直接监测法具有计量简便、数据实时且收集高效、人为干扰少等优点,但我国对该方面研究较少。分析总结了燃煤发电企业碳排放计量方法,研发了适用于火电企业的碳排放在线监测系统,并成功在某320 MW热电联产企业进行了应用示范,实现了总碳排放量、碳排放速率等主要参数的在线监测和历史数据统计。基于本系统监测的碳排放数据,对比了直接监测碳排放与核算碳排放的结果,分析了两者之间的差异原因。同时,利用企业提供的用煤量、煤低位发热量、供电量和供热量等生产数据,计算并分析了直接监测碳排放和锅炉产出能量、单位产品碳排放和锅炉效率之间的关系。结果表明,直接监测碳排放比核算碳排放少5%~30%,即每天少500~1 500 t;直接监测碳排放与锅炉产出能量变化基本一致,二者存在正相关关系,能反映锅炉的运行状态变化;单位产品碳排放与锅炉效率之间存在负相关关系。该系统的研发将进一步推动碳排放在线监测技术在发电、水泥、陶瓷、钢铁、石油化工等固定源排放企业的应用,为提升企业碳排放数据监测、管理和低碳生产水平评估,推进温室气体减排,以及开展碳排放权交易提供的技术支持和数据支撑。
The important foundation for the efficient operation of carbon trading mechanism is the objective,accurate and credible carbon emissions data.At present,the emission factor method is often used to account the greenhouse gas emissions,which has many disadvantages such as low accuracy,low efficiency of collecting data,and severe timeliness lag.Compared with the emission factor,the direct monitoring has the advantages of measure convenience,real-time and high efficiency of collection,less human intervention and so on.But there are few researches and applications on this aspect in China.Therefore,in this paper,the methods of the direct monitoring for coal-fired power generation enterprises were summarized,and a carbon emission online monitoring system for thermal power enterprises was developed. It was successfully applied in a 320 MW cogeneration enterprise,which could achieve online monitoring of major emission parameters such as total carbon emissions,carbon emission rate,etc.,and the statistical of historical data. Based on the carbon emission data monitored by the system,the results of direct monitoring and accounting of carbon emissions were compared,and the reasons for the differences of each other in this paper were analyzed.Meanwhile,with many production datas from the enterprise such as coal consumption,the low-level heat generation of coal,the power supply,the heat supply and so on,the relationship among the direct monitoring of carbon emissions and boiler output energy,carbon emissions per unit of product and boiler efficiency was calculated and analyzed.The results show that the carbon emissions of direct monitoring are about 5%-30% less than accounting of carbon emissions,which is 500-1 500 tons less per day.In addition,there is a positive correlation between direct monitoring of carbon emissions and boiler output energy,so their changing trends are basically identical,it can also reflect the changes of boiler operating conditions. There is a negative correlation between carbon emissions per unit product and boiler efficiency.On-line monitoring system for CO_2 reported in this manuscript has a good application prospect in fixed source emission enterprises such as cement,ceramics,steel and petrochemical industries and so on. It can significantly improve the enterprise' s level of the carbon emission data management and low-carbon production assessment.Moreover,it can provide a strong support of data and technology for greenhouse gas emission reduction and the operation of carbon emission trading.

关键词(KeyWords): 碳排放;温室效应;直接监测;碳交易;CO_2
carbon emissions;greenhouse effect;the direct monitoring;carbon trading;CO_2

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51676073);; 广东省能源高效清洁利用重点实验室(华南理工大学)项目(2013A061401005);; 中央高校基本科研业务费专项资助项目(2018KZ09);; 广州市科技计划重点项目(201904020017)

作者(Author): 李峥辉;卢伟业;庞晓坤;李运泉;白凯杰;李越胜;卢志民;姚顺春;
LI Zhenghui;LU Weiye;PANG Xiaokun;LI Yunquan;BAI Kaijie;LI Yuesheng;LU Zhimin;YAO Shunchun;School of Power,South China University of Technology;Guangdong Province Engineering Research Center of High Efficient and Low Pollution Energy Conversion;Shunde Inspection Institute of Special Equipment Inspection and Research Institute of Guangdong Province;Foshan Shunde Wusha Thermal Power Co.,Ltd.;

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DOI: 10.13226/j.issn.1006-6772.19121101

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