煤矿泡沫降尘发泡特性实验研究  

Experimental Research of Dust-reduction and Foaming Characteristic of Foam for Coal Mine

作　　者：陆新晓[1,2] 王德明[1,2] 任万兴[1,2] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221008

出　　处：《煤矿开采》2014年第1期102-106,共5页Coal Mining Technology

基　　金：国家自然科学基金青年科学基金项目(51104153;51374202);中央高校基本科研业务费专项资金资助(2012DXS02);煤炭资源与安全开采国家重点实验室自主课题(SKLCRSM08X06)

摘　　要：阐述了泡沫的形成及聚并机制,探讨了泡沫最终稳定形成所需的条件,并通过构建完整的泡沫发生系统,设计新型的泡沫发生器,研究得出了供风量与产泡量之间呈先增大后减小的"抛物线"型关系,超过最佳风量(44~47m3/h)后,液气逐渐分离,消泡现象明显,泡沫因不能获得足够的气体动力,产泡量开始减小;泡沫驱动压力上、下限与水量呈"剪刀状"关系,水量小于0.703m^3/h或者大于1.052m^3/h时,驱动压力变化剧烈,最大波动幅度9.1%,当水量在0.798~0.948m^3/h时,驱动上限与驱动下限值重合,泡沫驱动压力趋于稳定,近似维持在0.068~0.069MPa;风量对泡沫的喷射有重要影响,风量为65m^3/h时,喷射距离可达3m,但单纯依靠提升风量来进一步提升喷射距离存在局限性。This paper introduced foam formation and coalescence mechanism.The condition needed for foam stable formation was dis-cussed.By constructing whole foam generation system , new-style foam generator was designed.Research showed that air supply and bubble production took on first-large-then-small parabola relationship.After exceeding optimum air supply （44~47m3/h）, liquid and gas gradually separated , defoaming phenomenon was obvious.Foam production reduced for absent air pressure.Upper and floor limit of foam drive pressure and water volume took on scissor relationship.When water volume lesser than 0.703 m3/h or larger than 1.052 m3/h, drive pressure variation was large , maximum fluctuation range reached 9.1%;when water volume was within 0.798~0.948 m3/h, drive pressure tended to be stable and kept at 0.068~0.069 MPa.Air supply influenced foam injection largely , when it was 65m3/h, injection distance could be 3m, but it was limited only by increasing air supply to advance injection distance.

关 键 词：泡沫 降尘 聚并 产泡量 驱动压力 喷射距离 

分 类 号：TD714.4[矿业工程—矿井通风与安全]