1)coal dust煤炭粉尘
1.Effects of moisture on threshold velocity of coal dust水分对港口煤炭粉尘起动风速的影响研究
英文短句/例句
1.Influence factors and mathematical model of coal dust particles threshold velocity煤炭粉尘颗粒起动风速影响因素及数学模型
2.Effects of moisture on threshold velocity of coal dust水分对港口煤炭粉尘起动风速的影响研究
3.Research on the Law of Coal Dust Settling at Transfer Point and Simulation Analysis煤炭运输转载点粉尘沉降规律的研究
4.Status of coal enterprises and control of occupational hazards of dust Progress煤炭企业粉尘职业危害现状及防治进展
5.Atmospheric air-Test dust standard sample-Fly ashGB/T13269-1991大气试验粉尘标准样品煤飞尘
6.The Test Research of Electrostatic Precipitator Collecting Dust When Using Worse Coal;电除尘器收集困难煤种粉尘试验研究
7.Research on Electrostatic Precipitation System of Port coal production logistics港口煤炭生产物流静电除尘系统研究
8.Research on Dusting and Migration Rule of the Dust at Open-air Coalyard;露天堆煤场粉尘起尘及运移扩散规律研究
9.Ventilation and Dust Control of Main Room in Power Plant;燃煤电站主厂房通风与粉尘污染控制
10.Situation and Development Direction of Dust Prevention and Treatment for China Coal Mine中国煤矿粉尘防治的现状及发展方向
11.Desulfurizing and Dusting Reconstruction of No.5 Pulverized-coal Fired Boiler湘钢5~#煤粉锅炉的脱硫除尘改造
12.Application of LHF Rotary Cleaning Flat Bag Filter in Coal Production ProcessLHF型回转反吹扁袋除尘器在煤炭生产中的应用
13.Analysis on Current Status and Developing Trend of Pneumoconiosis Hazard in a Coal Mining Group Corporation某煤炭集团尘肺病危害现状及趋势分析
14.Influence of Coal Modifying Additive Added Into Coal Blend on Coke Quality在配煤中添加煤粉改性剂对焦炭质量的影响
15.Present Situation and Developing Trend of Technology of Carbonized Coal Processed from Anthracitic Powder无烟粉煤加工炭化型煤技术的现状与发展趋势
16.Study on the Preparation Technologies and Properties of Activated Carbon Separated from Fly Ash;利用除尘灰分离炭粉制备活性炭的工艺及性能研究
17.The seam water injection is an effective measure to control coal dust concentration.煤层注水是降低矿井粉尘浓度的有效措施之一。
18.Bug Dust Comprehensive Administering Feasibility Analysis for Shenhuazhunneng Corporation Coal-dressing Plant神华准能公司选煤厂粉尘综合治理可行性分析
相关短句/例句
inflammable coal dust爆炸性煤炭尘粉
3)coal dust煤粉，煤尘
4)gas dust煤气粉尘
1.The installation of fine dust on-line monitoring equipment in the BF gas dust-removing system and the entrance pipes of TRT unit can efficiently control the efficacy of dust bags and realize the on-line detecting of gas dust content in TRT unit entrance pipes,thus ensuring the running conditions of TRT unit and its long-term, high-efficient and safe running.在高炉煤气除尘系统和TRT机组入口管道上安装粉尘在线监测装置,可对气布袋除尘效果进行有效控制,并实现TRT机组入口管道煤气粉尘含量的在线检测。
2.The initiation of the cracks was caused by stress corrosion resulting from the co-effect of the corrosive gas dust and the axial tensile stress.表面裂纹萌生原因是拉杆在腐蚀性高炉煤气粉尘和轴向拉伸等工作应力的综合作用下,形成的应力腐蚀裂纹。
3.Installation of dust on-line monitor device in the dusting system of blast furnace gas and in inlet pipe of TRT set could effectively control cloth-bag dusting effect and realize on-line examination of gas dust content in the inlet pipe of TRT set.在高炉煤气除尘系统和TRT机组入口管道上安装粉尘在线监测装置,可对气布袋除尘效果进行有效控制,并实现TRT机组入口管道煤气粉尘含量的在线检测。
5)Coal dust煤粉尘
1.Gauss mode's using in measure and calculation of coal-flat and coal dust's exhanst stress;高斯模式在煤台煤粉尘排放强度测算中的应用
2.Coal dust could drop soil pH and increase EC and organic matter insoil to some extent,especially in the top layer of soil.研究结果表明,煤粉尘的降落值在污染源下风向明显高于其他方位,且随平均风速的增加而增加。
3.This paper analyzes the causes of coal dust pollution and its harm in coal feeding system of fuel workshop which exists in hot electricity department in Tianjin petrochemical company, and offers compre- hensive treatment plan integrated with the factual conditions.通过分析天津石化公司热电部燃料车间输煤系统煤粉尘污染产生的原因及危害,结合生产实际,提出综合治理方案。
6)coal mine dust煤矿粉尘
1.To monitor dust in coal mines for evaluation on dust hazards and assay its elements in order to provide science evident for exploring the dust occupational injury mechanism, coal mine dust were sampled by dust sampler for measuring the admissible level under short-term contact (PC-STEL) and the time-weighted average admissible concentration (PC-TWA).目的:监测煤矿井下粉尘浓度,评价煤矿粉尘危害水平;分析煤尘的组成成份,为探讨粉尘性职业损害机制提供依据。
延伸阅读
粉尘 粉尘 dust 密度单位体积粉尘的质量，有真密度、假密度、堆积密度之分。不包括存在于粉尘颗粒内部封闭孔洞的情况下，单位体积密实粉尘的质量称真密度；包括存在于尘粒内部封闭孔洞体积的密实粉尘，其单位体积的质量称为假密度，或称为表观密度。物料经机械性研磨、破碎形成的粉尘一般无内部的封闭孔洞，这些粉尘真假密度相等。单位体积松散粉尘的质量称为粉尘的堆积密度。 比表面积 单位质量粉尘的表面积称比表面积。比表面积与粒径成反比，粒径越小，比表面积愈大。比表面积对粉尘表面活性、附着、吸附、燃烧、爆炸等特性均有影响。 浓度 单位空气体积中粉尘的量。粉尘浓度是衡量空气污染程度的重要指标，与作业人员罹患疾病和粉尘爆炸界限等有关。粉尘浓度分数量浓度和质量浓度。数量浓度是单位体积空气中粉尘韵颗粒数，单位为n／cm3；质量浓度是单位体积空气中的粉尘质量，单位为mg／m3。在大多数场合下采用质量浓度，但对洁净车间或石棉等粉尘仍用数量浓度。 特性粉尘有很多特殊的属性，其中对防尘密切相关的有悬浮特性、扩散特性、附着特性、吸附特性、燃烧和爆炸特性、电特性、光特性以及粉料的流动特性等。 悬浮特性在静止空气中，尘粒受重力作用而沉降。当尘粒较细，沉降速度不高时，可按斯托克斯(stoke’s)公式求得重力与空气阻力大小相等、方向相反时尘粒的沉降速度，称尘粒沉降的终端速度。计算公式为U—Pp·d。·g／18p。式中g为重力加速度，m／s。；Pp为粒子密度，kg／m。；p为空气粘性系数，Pa·s；d为粉尘粒径，m。若再附加一些修正因素，计算密度为1、球形粒径为1弘m尘粒的终端沉降速度为O．0035cm／s}粒径10弘m的尘粒的终端沉降速度为O．3：Icm／s。实际空气绝非静止，存在各种扰动气流，因而可以视小于10btm的尘粒能长期悬浮于空气中。即便是大于10btm的尘粒，当处于上升气流中，若流速达到尘粒终端沉降速度，尘粒也将处于悬浮状态，该上升 】09气流流速称为悬浮速度。作业场所存在自然风流、热气流、机械运动和人员行动而带动的气流，使尘粒能长期悬浮。 扩散特性微细粉尘不仅可随气流携带而扩散，即使在相对静止的空气中，尘粒受到空气分子布朗运动的不断撞击也能形成类似于布朗运动的曲折位移。对于0.4拜m的尘粒，单位时间布朗位移的均方根值已略大于其重力沉降的距离;对0.1拌m的尘粒，布朗位移的均方根值相当于重力沉降距离的40余倍。这种运动使粉尘粒子不断由高浓度区向低浓度区扩散，也是尘粒流经微小通道向周壁沉降的主要原因。
