煤矿开采
煤礦開採
매광개채
COAL MINING TECHNOLOGY
2014年
1期
102-106
,共5页
泡沫%降尘%聚并%产泡量%驱动压力%喷射距离
泡沫%降塵%聚併%產泡量%驅動壓力%噴射距離
포말%강진%취병%산포량%구동압력%분사거리
foam%dust reduction%coalescence%bubble production%drive pressure%injection distance
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0.703 m3/h或者大于1.052 m3/h 时,驱动压力变化剧烈,最大波动幅度9.1%,当水量在0.798~0.948m3/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65m3/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。
闡述瞭泡沫的形成及聚併機製,探討瞭泡沫最終穩定形成所需的條件,併通過構建完整的泡沫髮生繫統,設計新型的泡沫髮生器,研究得齣瞭供風量與產泡量之間呈先增大後減小的“拋物線”型關繫,超過最佳風量(44~47m3/h)後,液氣逐漸分離,消泡現象明顯,泡沫因不能穫得足夠的氣體動力,產泡量開始減小;泡沫驅動壓力上、下限與水量呈“剪刀狀”關繫,水量小于0.703 m3/h或者大于1.052 m3/h 時,驅動壓力變化劇烈,最大波動幅度9.1%,噹水量在0.798~0.948m3/h時,驅動上限與驅動下限值重閤,泡沫驅動壓力趨于穩定,近似維持在0.068~0.069MPa;風量對泡沫的噴射有重要影響,風量為65m3/h時,噴射距離可達3m,但單純依靠提升風量來進一步提升噴射距離存在跼限性。
천술료포말적형성급취병궤제,탐토료포말최종은정형성소수적조건,병통과구건완정적포말발생계통,설계신형적포말발생기,연구득출료공풍량여산포량지간정선증대후감소적“포물선”형관계,초과최가풍량(44~47m3/h)후,액기축점분리,소포현상명현,포말인불능획득족구적기체동력,산포량개시감소;포말구동압력상、하한여수량정“전도상”관계,수량소우0.703 m3/h혹자대우1.052 m3/h 시,구동압력변화극렬,최대파동폭도9.1%,당수량재0.798~0.948m3/h시,구동상한여구동하한치중합,포말구동압력추우은정,근사유지재0.068~0.069MPa;풍량대포말적분사유중요영향,풍량위65m3/h시,분사거리가체3m,단단순의고제승풍량래진일보제승분사거리존재국한성。
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.