a State Key Laboratory of Clean Energy Utilization , Zhejiang University , Hangzhou , People's Republic of China.
b Department of Civil and Environmental Engineering , University of Tennessee , Knoxville , TN , USA.
J Air Waste Manag Assoc. 2018 Sep;68(9):920-930. doi: 10.1080/10962247.2018.1454992. Epub 2018 Jul 3.
Pollutant abatement systems are widely applied in the coal-fired power sector, and the energy consumption is considered an important part of the auxiliary power. An energy consumption analysis and assessment model of pollutant abatement systems in a power unit was developed based on the dynamic parameters and technology. The energy consumption of pollutant abatement systems in a 1000-MW coal-fired power unit that meets the ultra-low emission limits and the factors of operating parameters, including unit load and inlet concentration of pollutants, on the operating power were analyzed. The results show that the total power consumption of the pollutant abatement systems accounted for 1.27% of the gross power generation during the monitoring period. The wet flue gas desulfurization (WFGD) system consumed 67% of the rate, whereas the selective catalytic reduction (SCR) and electrostatic precipitator (ESP) systems consumed 8.9% and 24.1%, respectively. The power consumption rate of pollutant abatement systems decreased with the increase of unit load and increased with the increase of the inlet concentration of pollutants. The operation adjustment was also an effective method to increase the energy efficiency. For example, the operation adjustment of slurry circulation pumps could promote the energy-saving operation of the WFGD system.
The application of pollutant abatement technologies increases the internal energy consumption of the power plant, which will lead to an increase of power generation costs. The real-time energy consumption of the different pollutant abatement systems in a typical power unit is analyzed based on the dynamic operating data. Further, the influence of different operating parameters on the operating power of the system and the possible energy-saving potential are analyzed.
在燃煤电厂中广泛应用污染物减排系统，其能耗被认为是厂用电的重要组成部分。本研究基于动态参数和技术，开发了一种适用于满足超低排放限值的 1000MW 燃煤机组的污染物减排系统能耗分析与评估模型，并分析了机组负荷和污染物入口浓度等运行参数对运行功率的影响。结果表明，在监测期间，污染物减排系统的总耗电量占总发电量的 1.27%。其中，湿法烟气脱硫（WFGD）系统消耗了 67%的电量，选择性催化还原（SCR）和静电除尘器（ESP）系统分别消耗了 8.9%和 24.1%的电量。随着机组负荷的增加，污染物减排系统的耗电量率降低，随着污染物入口浓度的增加而增加。运行调整也是提高能源效率的有效方法。例如，浆液循环泵的运行调整可以促进 WFGD 系统的节能运行。
污染物减排技术的应用增加了电厂的内部能耗，这将导致发电成本增加。基于典型机组的动态运行数据，分析了不同污染物减排系统的实时能耗。进一步分析了不同运行参数对系统运行功率的影响和可能的节能潜力。
