Shenhua Zhungeer Energy Co., Ltd.;Shanxi Research Institute for Clean Energy Tsinghua University;Department of Energy and Power Engineering, Tsinghua University;
[Objective]The clean and efficient utilization of coal resources is an essential requirement for constructingChina's new energy system. As an important component of clean coal technology, coal water slurry holds significantadvantages. Numerical simulation studies have been conducted on the combustion characteristics of ultra-fine coalwater slurry. [Methods] A three-dimensional model of the test platform was established, incorporating turbulence,radiation, combustion, and discrete phase models. The study analyzes how changes in operational parameters such asfuel concentration, particle size, atomization angle, total air volume, and the ratio of primary to secondary air affect thetemperature and velocity fields of the test platform.[Results] The results indicate that an increase in fuel concentrationraises the furnace temperature and accelerates combustion, leading to an earlier ignition point and shorter flames.changes in particle size have minimal impact on combustion. An increase in atomization angle significantly consolidatesthe high-temperature zones, showing a dispersal trend; an increase in total air volume gradually expands the ignitionrange of the flame and delays the ignition point. An increase in the ratio of primary to secondary air significantly skews the direction of the flame within the furnace. Thus, it is demonstrated that increasing fuel concentration and total air volume significantly enhances combustion efficiency, while appropriate adjustments to the atomization angle and air ratio help optimize the stability and efficiency of the combustion process. The numerical simulation has confirmed that the optimal combustion conditions should be selected with a fuel concentration of 50%, a fuel particle size of 30 μm, a atomization angle of 30°, a total air flow rate of 0.316 kg/s, and a primary-to-secondary air ratio of 3: 7. [Conclusion] These findings are significant for enhancing combustion efficiency and advancing the industrial application of ultra-fine coal water slurry.
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Basic Information:
DOI：10.19944/j.eptep.1674-8069.2025.02.011
China Classification Code:TQ534
Citation Information:
[1]原铎,王雨果,甄鹏等.超细水煤浆燃烧特性的数值模拟研究[J].电力科技与环保,2025,41(02):281-293.DOI:10.19944/j.eptep.1674-8069.2025.02.011.
Fund Information:
北京市杰出青年科学基金项目(JQ23010); 国能准能集团有限责任公司科技项目(CEZB230302113)