超细水煤浆雾化燃烧技术

Atomization combustion technology of ultra-fine coal water slurry

为推动构建新型能源体系,煤炭的清洁高效利用仍是我国能源战略的重点。水煤浆技术作为煤炭清洁高效利用的重要方向之一,具有多种优势。针对超细水煤浆雾化燃烧方式开展试验研究,验证了4种结构雾化喷枪,定量分析不同条件下喷枪出口喷雾的粒径变化规律,结果显示雾化粒径D_(50)的波动范围61.7~119.3μm,D_(90)波动范围为105.7~181.7μm。基于雾化特性结果优化完成了雾化喷枪结构设计,在燃烧试验台上进行了试验研究,从燃烧温度、火焰形态、烟气状态等方面对比了不同结构喷枪的实际燃烧性能,确定不同喷枪结构对燃料燃烧性能的影响,为后续工程设计及设备的选型提供技术依据。相关工作推动了超细水煤浆燃烧技术开发。

In order to promote the construction of a new energy system,the clean and efficient utilization of coal is still the focus of China′s energy strategy.As one of the important directions of clean and efficient utilization of coal,coal water slurry technology has many advantages.The experimental study on the atomization combustion mode of ultra-fine coal water slurry was carried out,and four kinds of atomizing spray guns were verified.The change law of spray particle size at the outlet of the spray gun under different conditions was quantitatively analyzed.The results showed that the fluctuation range of atomizing particle size D_(50)was 61.7-119.3μm and the range of D_(90)was 105.7-181.7μm.Based on the results of atomization characteristics,the structural design of atomizing spray gun was optimized,and the experimental research was carried out on the combustion test bench.The actual combustion performance of different structural spray guns was compared from the aspects of combustion temperature,flame shape,flue gas state,etc.,and the influence of different spray gun structures on fuel combustion performance was determined,which provided technical basis for subsequent engineering design and equipment selection.Relevant work has promoted the development of ultra-fine coal water slurry combustion technology.