风机变频稀释超限瓦斯的变频查找法理论构建及实验  

Theory construction and experimental study of frequency-search method for diluting excess gas by increasing fan frequency

作　　者：王媛媛 蒋曙光[2] 韩靖[3] 胡利明[2] 

机构地区：[1]四川理工学院化学与环境工程学院,四川自贡643000 [2]中国矿业大学(徐州)安全工程学院,江苏徐州221116 [3]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《湖南科技大学学报（自然科学版）》2017年第4期1-8,共8页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(51134023)

摘　　要：提出了以风机变频增风稀释工作面超限瓦斯为核心的变频查找法.由稀释公式可计算出稀释瓦斯的所需风量,通过查找方法不断地从风机特性曲线库中选择曲线并带入风网解算程序,解算的风量不断地与稀释瓦斯的需风量作比较,最终选择出一条最接近且大于稀释风量的风机特性曲线.通过变频器调频将风机调至此特性曲线下运行,进而稀释瓦斯.搭建了实验模型,模拟瓦斯浓度超限时风机变频稀释瓦斯.实验表明风机所处的常态频率越小其稀释能力越大,在稀释能力范围内,可快速将超限瓦斯稀释到安全值,且调风比趋近于1.证明了变频查找法具有快速性、精准性、随动性、稳定性以及较好的稀释效果且风量利用效率较高.Frequency- search method was presented bases that diluting excess gas by increasing fan frequency. The required airflow was calculated to dilute gas by the dilution formula, then from fan performance curve database, the curve was selected to take in ventilation networks calculating program by search method continually. By comparing the calculated volume with required was a bit lager but proximate than required volume at last. curve to the one selected frequencies to dilute gas, volume, one curve was chosen whose air volume By using frequency converter to adjust fan performance to dilute gas, the experimental while gas concentration gauge. model was set up to simulate the fan changing of Experimental results show that the smaller the fan normal frequency, and the lager its dilution ability. Within dilution ability, gas reduce to safe value, and its volume-regulation ratio is close to servo method, which produce good 1. It proved that frequency-search dilution result and utilize efficiency method is a fast, accurate, steady and of air volume.

关 键 词：瓦斯 风量 风网解算 变频 风机特性曲线 

分 类 号：TD724[矿业工程—矿井通风与安全]