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煤矿井下粉尘污染既是一个劳动保护问题,也是一个环境保护问题。文章根据煤矿井下采掘粉尘的特性及其危害和对井下空气污染的状况,详细分析了煤矿井下的主要尘源和尘量分布。提出针对井下采掘各产尘源的治理措施。并对煤矿井下的防尘管理做了科学的展望。通过对粉尘污染的治理,改善煤矿工人的作业环境,实现清洁生产,降低矿工职业病发病率,提高煤矿生产效益和经济效益。 相似文献
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王小四 《中国新技术新产品》2013,(12)
室内装修污染问题已经成为现在文明社会一个严重困扰人类生活的问题。室内装修产生污染的源头和途径,污染源的种类,影响人类生活的严重程度,以及通过一些行之有效的方法来减轻和治理室内装修污染,都应该成为人类社会所共同关注的内容。 相似文献
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随着人民生活水平的提高,人们越来越重视粉尘污染、环境污染问题,积极的采取了各种防护和治理措施来预防这些问题。经相关数据统计,建筑施工是造成粉尘污染、噪音污染的主要根源之一,在这些建筑污染中以混凝土问题引起的环境污染最为严重。泵送混凝土作为目前混凝土施工的主要方式,有着施工效率高、速度快、质量好的优势。本文从泵送混凝土特点分析,总结了楼板裂缝产生原因,并有目的的探讨了相关对策。 相似文献
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吴永红 《中国新技术新产品》2012,(4):195
由于室内装修带来的室内环境污染越来越引起人们的重视,本文分析了产生室内环境污染的原因,总结了污染对人造成的危害,告知装饰材料的选择方法及应注意的事项,和对装饰后的质量监测及发生污染后的治理方法。 相似文献
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通过对矿山粉尘的危害分析,简要介绍呼吸性粉尘的监测方法及治理措施,说明矿山通风是控制粉尘危害的重要手段。 相似文献
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本项目为香山戊二采区下延回风巷,对千喷工艺中出现的回弹率高、粉尘污染大,喷层强度低、韧性不够,耐久性差等问题做出研究,通过掺加矿物掺合料和有机聚合物组分改性,并找到合理解决方法,同时对传统干喷工艺进行改进,引进水泥裹石,水泥裹砂技术,变干喷为潮喷,提高喷射混凝土力学性能,同时降低回弹,减小粉尘污染。 相似文献
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《Advanced Powder Technology》2019,30(9):1789-1804
In order to solve the problem of dust pollution caused by ore unloading in ore pass, this paper, taking Li Lou Mining as a case study, conducted the wind speed variation law in the fluid domain and the impact of the collision between the ore in the unloading process on the fluid to determine the key dust control point based on the CFD-DEM coupling software. By Fluent software, the air curtain dust-proof efficiency under the action of unloading airflow is analyzed, and the relationship between the dust-control wind speed and the impinging airflow is known. And an experimental model of gas water spray is established to analyze the effect of spray dust removal. By analyzing the impact airflow and dust migration caused by ore unloading and the effect of air curtain dust control through numerical simulation, it can be seen that when the ore discharging quantity Mo = 4000 kg, the dust production is mainly concentrated in the fourth middle section. By high-pressure air shield assisting dust removal, dust diffusion can be better controlled when the ratio of impact wind speed of ore pass wellhead (denoted as λ) to high-pressure air curtain wind speed (denoted as ζ) is at least 1:8. When the dust removal effect is optimal, the ratio δ of the water supply amount ql and the gas supply amount Qg is determined by the gas water spray dust control experimental platform. 相似文献
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为了有效地控制尘埃颗粒物的污染、改善环境与空气质量,有必要掌握大气尘埃 颗粒物的分布.本文研究一类大气非线性等离子体扩散方程初值问题.首先利用奇异摄动和Fourier变换方法,分别求出了问题的外部解和初始层校正项,并构造了解的形式渐近展开式.其次利用先验估计证明了解的展开式的一致有效性.然后举例给出了各次渐近近似解.最后叙述了近似解析解的物理意义.通过近似函数可定量地计算出尘埃等离子体相关的物理量,以采取适当的措施,有助于减少灾害的影响. 相似文献
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A. A. Esmaili T. J. Donohue C. A. Wheeler W. M. McBride A. W. Roberts 《Particulate Science and Technology》2013,31(3):248-255
This article presents the outcomes from a series of physical experiments to measure the air entrainment rates encountered within a stream of freefalling particles. The experimental work presented spans a range of particle parameters and hopper geometries. From these results a new theory for the prediction of air entrainment is developed and presented. This new method was developed specifically to facilitate a better understanding in the area of fugitive dust control associated with material handling systems, which are driven by the air entrainment during freefalling. From the work presented in this article, a better prediction capability of freefalling bulk materials in either constrained, or unconstrained systems, will allow for the optimization of either passive or active dust control strategies. This article presents several distinct sections that detail the experimental work used to determine the freefall stream parameters that were conducted to allow the development of the entrainment equations. 相似文献
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将静电喷雾技术与无人机技术相结合用于治理开放性粉尘,使用Fluent对粉尘的扩散模型进行数值模拟。模拟得出无人机工作高7m,喷雾压力为0.2MPa时,无人机静电喷雾的平均降尘效率能达到85.87%,并在自然风速为1m/s、空气相对湿度为70%时,局部区域的降尘效率高达95.93%。本文提出的无人机静电喷雾控制开放性粉尘技术降尘效果较好,对沉降重金属污染粉尘技术发展有重要意义。 相似文献
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《Advanced Powder Technology》2020,31(6):2456-2468
During coal mining, the fully-mechanized tunnel is always under high-concentration of dust pollution. This brings not only the potential risk of dust explosion but also makes the tunnel workers suffer from coal mine pneumoconiosis (CWP), a systemic disease featured by pulmonary fibrosis. Therefore, it is extremely important to establish a theory and optimal parameters for dust control over fully-mechanized excavating tunnels. In this study, we analyzed the dust diffusion under several parameters, including the distance between the forced air opening and the cutting face (LY), the height of the forced air cylinder above the floor (LH), and the distance between the center of the forced air cylinder and the nearest coal wall (LJ). The optimal dust control parameters were determined as: LY = 20 m, LH = 3 m and LJ = 0.6 m. Under this condition, the airflow can effectively suppress the diffusion of dust particles. At the same time, the operating environment of the roadheader driver was remarkably improved and the requirements on miners’ occupational health and safe production were satisfied. The present study proposed a new approach for occupational health of the workers in the excavating tunnel and clean production management. 相似文献
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利用塔克拉玛干沙漠大气环境观测试验站2010年4月11日沙尘天气风廓线雷达资料,分析了此次过程启动爆发的水平风场、垂直速度和雷达等效回波强度特征。研究表明:风廓线雷达是进行沙尘探测和监测的一种有效的高空大气遥感系统,它不仅可以捕捉到沙尘天气的开始和结束时间,而且能监测到沙尘在空中被输送的高度、厚度范围以及沙尘运动的垂直强度特征;塔克拉玛干沙漠扬沙和沙尘暴雷达等效回波强度约为-3~10 dBZ,浮尘等效回波强度约为-15~-3 dBZ;水平风垂直切变以及低空东风的维持是此次沙尘天气发生的动力成因。扬沙、沙尘暴发生时,大气垂直速度表现为上升运动,在较大水平风速及干燥下垫面的配合下,导致地面沙粒被输送到高空,形成了沙尘天气。 相似文献
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"十二五"以来,我国煤电大气污染物的控制取得了很大的成就,烟尘、二氧化硫、氮氧化物排放总量和强度快速下降,控制水平达到世界先进水平。"十三五"乃至更长时期,煤电仍将承担国家大气污染物减排的重任。重点研发高性能、高可靠性、高适用性、高经济性污染物的控制技术、资源化技术、多污染物协同控制技术是未来我国煤电大气污染物控制的主要技术方向。预计到2020年,烟尘、二氧化硫、氮氧化物年排放量分别降至2×10~5~3×10~5 t、1×10~6~1.5×10~6 t、1×10~6~1.5×10~6 t。 相似文献
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郝海洋 《制冷与空调(四川)》2004,18(2):43-45
石灰石卸料斗除尘系统,是一套完整的粉尘治理系统.本文介绍了该系统的设计方案,重点介绍了石灰石粉尘特性、除尘风量的计算方法以及除尘系统构成,并对粉尘收集处理设备的选用做了初步探讨. 相似文献