姚桥煤矿井下综合防尘智能化技术研究

本文介绍了矿井智能化防尘监测监控系统,通过矿井防尘自动控制,增强了井下防尘的可靠性和适用性,提高了综合防尘效果,全矿井防降尘监测监控运行体系,是有效防止粉尘危害的常规设备和重要设施     

广州体育馆爆破拆除的粉尘控制

介绍了广州体育馆控制爆破拆除中采取的防尘措施,建立410m的喷水管网,应用高压喷水系统形成的水幕墙和直升飞机投水弹等综合防尘、除尘措施,有效地控制粉尘的形成和扩散,减少了粉尘对市区的污染。     

浅析煤矿综采面综合防尘措施

本文浅析煤矿综采工作面防尘存在的问题、 产生粉尘的主要因素及综合防尘措施与效果。     

综采工作面自动化全方位防尘系统的研究与应用

当前综采工作面除沿用传统普通综采工作面采取的综合防尘措施外,还要采用一些现代化高科技的综合的防尘措施。本文针对综采工作面综合防尘系统存在的问题,提出了综采工作面加强综合防尘主要措施的实施与管理,对提高这些防尘措施的作用效果,减少粉尘危害具有一定的指导意义。     

综掘机粉尘治理研究与应用

通过进行综合防尘研究，采取强劲有力的防尘措施，工作面的粉尘浓度有了大幅度的下降，杜绝了煤尘爆炸的发生和最大限度地减少了职工患煤肺病的可能。     

关于解决浅井开采水压不足问题的研究

随着现代化采掘活动,在采掘过程中大量产生煤尘、岩尘等有危害性粉尘,为此根据煤矿安全要求要防治粉尘危害,除尘降尘非常重要,而除尘降尘用水是最有效的方法,煤矿主要防尘降尘设施有防尘水幕、采掘设备内外喷雾、运输破碎系统及转载点喷雾降尘设施。     

浅析煤矿掘进粉尘的治理措施

对于煤矿来说,煤矿掘进的粉尘治理一直是矿井安全生产的一个重要难题。随着我国目前的能源战略的不断深入发展,现代化矿井的生产力有了很大的提高,但是随之而来的粉尘问题也越来越严重,粉尘的增加不仅对矿井工人的身体健康有很大的不利,而且还是引发煤矿安全事故的重大隐患。因此,各个国家针对矿井粉尘都分别出台了严格的粉尘标准,以保证矿井工人的身体健康和矿井的安全生产。那么要想治理好粉尘,就要详细了解了解煤尘产生的各个原因,然后,根据各个因素,来制定防尘的措施,有了合理的防尘措施才可以维持煤矿企业的正常发展的步伐。     

掘进工作面综合防尘技术的应用

粉尘是煤矿生产中的主要危害之一,本文介绍了一种新型除尘器及其配套的防尘措施控制掘进工作面粉尘的实践。在生产实践中通过采取该措施,综合机械化掘进工作面的粉尘浓度得到大幅度降低,给操作人员创造了良好的工作环境。     

45m高烟囱防尘定向爆破拆除

待爆破拆除的45 m高烟囱位于青岛市市南区繁华地段,为保证将爆破粉尘降到最小,采取了悬挂水袋等降尘措施,是一次安全、环保、高效的防尘定向爆破。介绍了烟囱的爆破方案,各种参数选择以及烟囱防尘爆破的具体措施。     

煤矿粉尘防治技术应用探讨

煤矿粉尘影响矿井安全生产,威胁职工身体健康,是煤矿五大灾害之一。有效控制粉尘,降低粉尘浓度,改善工作环境、杜绝煤尘事故,是煤矿安全生产的一个重要环节。本文就我国目前的防尘技术做以分析,并提出煤尘控制技术的发展趋势。     

Gas-liquid dual phase inhibition method for explosion accident of wet Al dust collection system based on KH2PO4

Metal dust has explosion risk in wet dust removal system. In this study, a gas–liquid dual phase explosion hydrogen inhibition method (EHIM) is proposed. The inhibitory effect of KH₂PO₄ on Al dust explosion in a dust removal pipe (gas phase) and Al dust hydrogen generation in a wet dust collector (liquid) is discussed separately and collectively. Adding 70% KH₂PO₄ totally inhibits the formation of Al dust explosion flames while inhibiting Al–water reaction in the wet dust collector at the same time. Inside the dust removal pipe, KH₂PO₄ acts in the initial stage of Al dust combustion and works as a pyrolysis endothermic coolant under 220℃–380℃; inside the aqueous solution of the dust collector, it generates AlPO₄ with water and creates a film over the surface of the Al particles, which isolates water from Al, thus blocking Al–water reaction. Our new method offers a novel way of protecting the safety of wet dust removal systems.     

烟尘净化装置性能优化方案

以实验室现有烟尘净化装置为研究对象建立实验方案.通过对装置的各种参数的测试,探索其含尘气流速度、进气烟尘浓度、滚筒旋转速率、水位高度等因素对净化效率和排放浓度的影响,并利用灰色关联分析和拟合回归分析相结合的方法建立净化效率和各因素之间的数学模型,拟为烟尘净化装置的优化提供技术支持,建立的优化模型也可为其他净化装置的机理研究和性能优化提供借鉴和参考.     

玉米淀粉电火花点火数值模拟

在粉尘云电火花点火实验研究的基础上,结合粉尘云点火机理,建立完整的粉尘云点火模型。通过模型计算玉米淀粉的最小点火能,并模拟点火过程中颗粒温度随时间的变化过程,同时分析在无粉尘粒子情况下电火花温度的变化情况。通过模拟计算,得到玉米淀粉在敏感条件下的点火能为2.9 mJ,计算结果与实验数据基本一致,由此可以进一步理解粉尘云的点火过程及电火花放电过程。     

Development of a New Wind-Blown-Dust Emission Module Using Comparative Assessment of Existing Dust Models

A new wind-blown dust emission module has been fabricated to be used in investigating the development and transport of Asian dust storms. A number of different dust emission models currently used worldwide were critically compared to collect the state-of-the-art schemes for each parameterization step of the wind erosion process. Thorough assessment of the dust models were conducted with an aid of literature review to judge the advantages and drawbacks of each model. The threshold friction velocity for smooth dry surface, the drag partitioning effect by non-erodible surface roughness elements, the soil moisture effect, the positive feedback of the saltating soil particles to the friction velocity, the saltation scheme calculating the horizontal soil flux, and the sandblasting scheme calculating the vertical dust emission flux were considered. A new wind-blown dust emission model was developed using the best components determined based on the analyses of this study. The predictions of the size-resolved wind-blown dust emission by different models were compared for the first time with a field measurement available in the literature. The new model developed in this study showed a reasonably good agreement with the measurement (agreement index of 0.91).     

Study on the combined dust suppression effect of sodium alginate and sodium fatty acid methyl ester sulfonate

To further improve the effect of dust control in coal mines and protect the health of workers, the effect of sodium alginate (SA) on the dust suppression ability of sodium methyl ester sulfonate (MES) was studied using molecular dynamics simulation. Scanning electron microscopy and X-ray photoelectron spectroscopy analyses were performed to compare the dust suppression effect of the SA/MES dust suppressant compound to MES by itself. The results show that when SA is present, the coal dust bonds together more, agglomerates into large particles, and settles. This finding is also consistent with the results of molecular dynamics simulations. In the analysis of relative concentrations and mean square displacement, the presence of SA can reduce the water diffusion on the coal surface, making it easier for coal dust to agglomerate. In addition, we analyzed the mode of action of SA through radial distribution and electrostatic potential, and determined that SA forms a unique networking chain structure to capture and retain water molecules. SA increases the probability of interaction between water and surfactant, thus increasing the amount of adsorption. This study provides a more in-depth understanding of the dust suppression mechanism of mixed dust suppressants.     

露天石灰石矿山爆破降尘技术应用研究

露天矿爆破作业是矿区粉尘排放的最大来源,为探讨深孔台阶爆破水袋封堵降尘效果,进行了现场实验,通过合理设计实验方案,对水袋不同长度、直径、厚度和不同装填位置、比例等条件下的有爆破粉尘的浓度进行对比,依据实测数据分析得到了水袋参数和爆破粉尘浓度的关系。实验结果表明:水袋爆炸水雾在露天矿山台阶爆破中会显著降低爆破粉尘浓度,双水袋中间隔钻屑比单水袋降尘效果更加明显,水袋填塞长度占填塞总长度的最佳比例为75%。     

加速粉尘凝聚减少爆破拆除扬尘的理论与实践

通过对尘粒起动风速与尘粒粒径之间关系的研究,认为可以通过加速粉尘颗粒凝聚,从而生成大尘粒的办法来减少爆破拆除中的扬尘.通过对尘粒间物理凝聚力的大小及其生成条件的研究,发现在干燥情况下促使尘粒凝聚的主导作用力是范德华力;在湿润条件下促使尘粒凝聚的主导作用力是液体桥联力,并且液体桥联力比范德华力要大得多.因而认为用物理方法创造液体桥联力发挥作用的条件,生成大而牢固的尘粒,减少爆破拆除中的扬尘是合适的.通过对尘粒间化学作用力的研究,认为用化学方法增大尘粒间的凝聚力,减少爆破拆除中的扬尘是可行的和重要的.用现场实践数据支持了上述结论.     

基于 Matlab GUI 的爆破粉尘可视化软件设计与实现

目前关于爆破粉尘可视化的研究报道较少。在分析城市拆除爆破粉尘的基础上对高斯模型进行修正构建了改进型高斯扩散模型,采用 Matlab GUI 工具箱对所构建模型进行了可视化软件设计。软件可以用来计算粉尘源强,并能够精确绘制该粉尘源强条件下爆破粉尘浓度分布三维图及其二维图。采用 Matlab GUI 工具箱所绘制的二维和三维图形能够直观、形象的反应任意时间点任意坐标精度以及一定范围内的爆破工程粉尘的扩散状态。     

Experimental and molecular dynamics simulation research on compound dust suppressant based on locust bean gum

To solve the problem of coal dust pollution, this paper used experiments and molecular dynamics simulations to develop a new composite dust suppressant with locust bean gum as the binder, fatty alcohol polyoxyethylene ether as the wetting agent, and glycerol as the water-retaining agent. Through a single factor analysis of the effects of each material, the appropriate concentrations of each were selected for an orthogonal experiment. The best composition of dust suppressant was obtained from an anti-wind erosion experiment. Then, scanning electron microscopy and energy-dispersive X-ray spectroscopy were performed on a coal sample sprayed with dust suppressant to observe that the dust suppressant had good adsorption on and binding to low-rank coal. Finally, an on-site experiment was conducted on the developed composite dust suppressant. The dust reduction rate reached 92.3%. Materials Studio software was used to simulate the interaction between dust suppressants and coal dust, with pure water as a control group for comparison. By analyzing the electrostatic potential of the dust suppressant and low-rank coal molecules, as well as the relative concentration distribution curves of both molecules, the water molecule mobility, and the heat of adsorption, the micro-action between dust suppressants and coal could be understood.