一种水泥厂除尘技术工作原理与实践：湿法高压静电组合式除尘器

介绍了一种水泥厂除尘的有效技术-湿法高压静电组合式除尘器，包括其构造、原理与应用实践，也包括该方法的优点和要求，以供同类企业的应用参考。对解决水泥厂粉尘污染问题有现实意义。     

改进炉内燃烧工况在烟气治理中的作用

本文分析了一台锅炉烟尘治理失败的原因，并根据这一典型实例，对同类型问题提出了改进意见。     

尘埃粒子显微计数系统的设计

该文给出了自行设计的尘埃粒子显微计数系统,它可用于空气洁净度等级的测量.利用光散射原理,由半导体激光器照射漂浮在空气中的灰尘颗粒,选取90°角入射,使背景光的干扰降到最低,通过光学显微镜和CCD放大成像在显示器上,尘埃粒子的散射光斑就可以被清晰观察到.气流速度采用流水吸气法控制,很有实用价值,有利于对尘埃粒子进行人工计数,以及利用自编的程序实现计算机自动计数.     

地球变暖带来的灾难

人类活动过程中，过度地．排放温室气体和烟尘，使地球气候变暖，造成冰川融化，海平面上升；物种灭绝；干旱、洪涝、沙尘暴、飓风频繁地袭击地球；农作物减产，对人体健康也来严重影响．只有加强生态系统建设，加强国际合作，减排温室气体和烟尘，才能遏制气侯变暖．     

难堪的沉默

I watched her draw while the dust from the country road billowed around the passenger seat window. She held the red felt-tipped pen in her slight hand like it was an extension of her self. Small squares of yellow memo pad paper were scattered in her lap.     

Experimental approaches and analytical technique for determining heavy metals in fallen dust at ferrosilicon production factory in Edfu, Aswan, Egypt

In this study aimed to evaluate the pollution extent of metals and nonmetals inside and outside the ferrosilicon production factory in Edfu, Aswan, Egypt, raw materials (quartz, cokes, iron oxides), ferrosilicon alloy, silica fume, dust and suspended dust (at different sites) samples were collected from the factory, and fallen dust samples were collected from outside the factory, horizontally (at different sites and different distance and directions) and vertically (at different floors in the selected buildings). Gravimetric methods, X-ray fluorescence (XRF), flame photometer, wide range carbon determinator and atomic absorption spectroscopy tools were used for elements determination. The results indicating that the fallen dust and its element contents on southern factory walls being higher than those on eastern factory walls may be due to the nature of the dusts and effects of wind force and wind direction. Fallen dust levels in different regions outside the factory were found to be affected by the distance, direction and floors. The nature of dust samples was affected by gravity and the suspended dust in different factory units depended on the work capacity and method of handling materials by personnel in different production units. Silica fume was a complicated problem, had dangerous effect against the workers' health, and was characterized by high concentrations of SiO2(90.6%～93.6%) and heavy metals (Mn, 420.6×10-6～520.3×10-6; Fe, 2354×10-6～2685×10-6; Co, 80.7×10-6～101.6×10 6 and Ni,5.3× 10-6～6.05× 10-6). The TSP (Total Suspended Particulate) levels in all factory units were higher than the recommended air quality value (70 μg/m3) under Egyptian law. The effect of ferrosilicon factory fallen dust on the surrounding regions decreased with increasing distance between the factory and these regions. The suspended dust samples in the factory units and their components greatly exceeded national and international standards, so health and environmental criteria must be enforced on these units.     

茶梗、茶枝屑代料对黑木耳生长及品质的影响

对比分析黑木耳在茶梗、茶枝屑不同基质配方上的菌丝生长、出菇表现、产量及营养成分。结果表明:黑木耳在各基质配方上均能正常生长、出菇,除配方CG1(78.5%茶梗)、CZ1(78.5%茶枝屑)产量及生物学效率低于对照CK(78.5%杂木屑)外,其他均高于CK,其中配方CZ2(48.5%茶枝屑)最高,生物学效率比CK高出10.09%;含茶枝屑配方栽出的黑木耳粗蛋白、粗脂肪、粗纤维、Ca、Fe、Zn、总氨基酸、必需氨基酸等营养成分均高于CK,而含茶梗配方栽出的黑木耳则是粗蛋白、粗多糖、灰分高于CK。综上所述,茶梗、茶枝屑作为代料栽培黑木耳可行,茶枝屑代料栽培出的黑木耳总体品质要优于茶梗代料。     

暖通在冶金设计中需要注意的几个问题

随着社会经济的发展、劳动生产力的提升和国家对劳动卫生安全的重视,冶金行业的生产技术水平得到了长足的发展和进步。暖通专业作为冶金生产辅助系统中不可或缺的一分子,其重要性、关键性及特殊性正日益凸显。在通风除尘设计中,粉尘和有害气体的性质分析、动力风机的配置、净化设备和措施的选择是尤为重要的三个关键因素,决定着整个通风除尘系统的好坏。     

防静电袋式除尘器

在特制的涤纶布中嵌入改性腈纶纤维,用它做成的防静电除尘滤袋具有如下特点:导电纤维不受环境影响;织物带电时通过自身微弱的电晕放电并向大地泄漏;织造时经纱用长丝,纬纱用短丝。对防静电除尘滤袋与普通除尘滤袋在物理性能、带电量及除尘效率等几方面比较的结果,都证实了防静电除尘滤袋的优越性。因此,防静电除尘滤袋近年来在港区大型粮食筒仓及大型工矿企业的除尘器中被广泛地采用。     

对长距离水平气力输送的探讨

过去,气力输送的应用仅限于较短距离;然而,目前燃煤的火力发电厂产生的大量粉煤灰需采用长距离气力输送装置来清除。以降低功率消耗为目标,本文将介绍几个有关长距离水平输送的问题——长水平管内的不同固气流动型态,能耗最低的风速,输料管优化设计和仓泵的试验。