【摘要】：為研究不同類(lèi)型氣水噴嘴的霧化效果及氣體流量和水流量對(duì)霧化效果的影響,基于實(shí)驗(yàn)室自行設(shè)計(jì)的氣水噴霧實(shí)驗(yàn)系統(tǒng),利用JL-3000型激光粒度分析儀及電磁流量計(jì)和轉(zhuǎn)子流量計(jì)對(duì)氣水噴嘴流量特性及最佳工況條件進(jìn)行了實(shí)驗(yàn)研究。采用origin軟件對(duì)數(shù)據(jù)進(jìn)行分析得到霧化粒徑及霧滴相對(duì)尺寸ΔS隨氣體流量及水流量的變化曲線,并以此衡量噴嘴的霧化效果。利用噴霧學(xué)、流體力學(xué)及多相流等理論對(duì)實(shí)驗(yàn)現(xiàn)象進(jìn)行分析并得到噴嘴的最佳工況條件。實(shí)驗(yàn)結(jié)果表明:當(dāng)水流量一定時(shí),隨著氣體流量的增加,霧滴粒徑減小速度由快變慢。當(dāng)氣體流量為80 L/min時(shí),水流量為5 L/h即氣液比為960時(shí)干霧噴嘴霧化效果最好,扇形噴嘴和錐形噴嘴氣水流量分別為100 L/min,5 L/h和140 L/min,5 L/h,即氣液比分別為1 200和1 680時(shí)其霧化效果最好。通過(guò)對(duì)比最佳霧化效果發(fā)現(xiàn)干霧噴嘴的霧滴粒徑及霧滴相對(duì)尺寸最小,可以達(dá)到更好的霧化效果和經(jīng)濟(jì)效益。
[Abstract]:In order to study the atomization effect of different types of gas-water nozzles and the effect of gas flow and water flow on the atomization effect, the air-water spray experimental system was designed by the laboratory. JL-3000 laser particle size analyzer, electromagnetic Flowmeter and rotor Flowmeter are used to study the flow characteristics and optimal operating conditions of air-water nozzle. The change curves of atomization particle size and relative size of droplet 螖 S with gas flow and water flow were obtained by origin software, and the atomization effect of the nozzle was measured. The experimental phenomena were analyzed by using the theories of spray, hydrodynamics and multiphase flow, and the optimum operating conditions of the nozzle were obtained. The experimental results show that when the water flow rate is constant, the droplet size decreases from fast to slow with the increase of gas flow rate. When the gas flow rate is 80 L/min and the water flow rate is 5 L / h, that is, when the gas-liquid ratio is 96, the atomization effect of the spray nozzle is the best. The best atomization effect is obtained when the gas-water flow rate of sector nozzle and conical nozzle is 100 L / min 5 L / h and 140 L / min 5 L / h respectively, that is, the gas-liquid ratio is 1 200 and 1 680 respectively. By comparing the optimum atomization effect, it is found that the droplet size and the relative size of the droplet are the smallest, which can achieve better atomization effect and economic benefit.
【作者單位】： 北京科技大學(xué)教育部金屬礦山高效開(kāi)采與安全重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51604018) 北京市自然科學(xué)基金項(xiàng)目(8164060)
【分類(lèi)號(hào)】：TD714.4

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本文編號(hào)：2267047