共查询到20条相似文献,搜索用时 296 毫秒
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实用高效的油烟净化分离技术及设备 总被引:1,自引:0,他引:1
随着餐饮业的快速发展,油烟的污染日益严重。分析目前油烟污染的净化处理现状,论述了新型高效的油烟净化分离技术机理,从而开发研制出经济实用的油烟净化设备,为我国控制油烟污染开辟了新途径。 相似文献
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餐饮油烟催化净化技术的研究进展 总被引:1,自引:0,他引:1
油烟污染控制是近年来人们关注的重点,介绍油烟的形成过程以及油烟的成分分析,表明油烟主要成分是脂肪酸、烷烃和烯烃等,其次是醛类、酯类、醇类及多环芳烃等。探讨当前油烟净化处理的多种方式,着重对催化转化法的研究现状进行阐述。 相似文献
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在垃圾压缩中转站中,粉尘及臭气是显著的二次污染物,应采取有效的工艺手段来进行处理及控制。目前国内先进的垃圾压缩中转站均开始配套除尘除臭系统,以避免二次污染的发生,但仍不是普遍现象。文章将介绍洗涤法配合生物法对站内的粉尘及臭气进行处理的工艺及一些相关的技术特点及计算。 相似文献
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Chung Sik Yoon Nam Won Paik Jeong Han Kim Hyun Byung Chae 《Aerosol science and technology》2013,47(6):511-521
The chemical composition and solubility of metals in welding fumes is thought to be related to the welder health but is not well characterized. We quantified and compared the total (insoluble + soluble) and soluble metal contents in fumes from flux-cored arc welding using non-stainless steel (FCAW/NSS) and stainless steel (FCAW/SS) wire. Welding was performed in an American Welding Society standard fume collection chamber. The total content of 13 analyzed metals was significantly higher in FCAW/NSS fumes than in FCAW/SS fumes (51.6 ± 5.7 vs. 40.2 ± 5.2%, p < 0.001). Soluble metal content was significantly higher in FCAW/SS fumes than in FCAW/NSS fumes (15.5 ± 5.8 vs. 6.49 ± 2.4%, p < 0.001) due to the presence of potassium and sodium. Different proportions of each element were observed between welding types. Iron, magnesium, and aluminum were significantly higher in FCAW/NSS fumes, whereas chromium, nickel, and potassium were more common in FCAW/SS fumes. The metal composition of FCAW fumes was more similar to that of shielded metal arc welding fumes than that of gas metal arc welding fumes. It seems unnecessary to measure soluble iron, nickel, aluminum, and barium to compare with their soluble ACGIH-TLVs at the FCAW welding process. But chromium should be specified in terms of its valance and solubility. 相似文献
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介绍了近年来壳聚糖在处理工业废水、生活污水和净化饮用水中的应用。由于壳聚糖具有易分离、絮凝作用强、无污染等特点,因此在废水处理中应用广泛,是一种很有发展前途的高分子絮凝剂。 相似文献
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随着我国餐饮业的迅速发展,大量含有有害气体和致癌物质的烹调油烟直接排放到空中,亟需治理,而传统方法净化效率不高,无法满足排放标准。为了解决这一问题,本文利用离心技术、过滤技术、电晕放电技术和光解技术组合成复合式油烟净化器,并对其净化效率、放电电流和臭氧浓度进行了相关研究。研究结果表明,随着工作时间的增加,离心技术、过滤技术和电晕放电技术组合的净化效率最为平稳,保持在95%左右;有过滤层时,静电段放电电流随工作时间的增加衰减的较慢,且相同电压下,负电晕放电时放电电流随工作时间衰减的更慢;有静电段时,油烟净化器的臭氧浓度最高,且添加过滤层技术后臭氧量减少趋势最慢。总体而言,过滤技术有效地提高了净化效率,减小了放电电流和臭氧浓度的衰减。 相似文献
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粉煤灰综合利用现状及发展建议 总被引:16,自引:1,他引:16
介绍了粉煤灰的几种主要综合利用途径:粉煤灰制备建筑材料,包括粉煤灰制砖、制各种砌块、制取水泥和混凝土基本材料等;粉煤灰在农业方面可以制成肥料和土壤改良剂;粉煤灰在废水处理和烟气脱硫方面的应用等。应加深对粉煤灰综合利用的认识,加快研究成果产业化步伐。 相似文献
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Gary R. Blackburn William T. Bleicher Jr. Stacy Glidden Gerald Reinke 《Polycyclic Aromatic Compounds》2013,33(4-5):533-544
The development of sensitive methods for monitoring polycyclic aromatic compounds (PACs) has been a central focus of industrial hygiene studies in those industries where workers are exposed to petroleum oils, bitumen fumes or fuel combustion products. The work reported here focuses on one aspect of that effort—workplace monitoring of airborne PAC levels in the hot-mix asphalt paving industry. During the manufacture, transport, and roadway application of hot-mix asphalt (HMA), workers are exposed to low levels of bitumen fumes emanating from the hot product. Over the last twenty-five years, concerns about the health effects of these exposures have prompted numerous studies of the airborne levels of asphalt fumes in the workplace. By and large, these studies have shown that PAC exposures are extremely low—often below the detection limits of standard analytical techniques. For the present study, we have used standard industrial hygiene methods, together with a newer, biologically based assay called the Nitration Assay to measure relative ambient levels of fumes and/or PACs in various paving workplace settings. The latter assay was also used to test bitumen fumes generated in the laboratory by a new “microfuming” technique and to determine specific activities of the 16 PAHs designated by the US EPA as priority pollutants. The Nitration Assay takes advantage of two properties of 3–7-ring PACs: the ease with which they can be chemically nitrated and the high mutagenic potency of the nitrated products in the Ames Salmonella mutagenicity assay. Measurements of fumes and nitratable PAC levels on seven different hot-mix paving jobs showed reasonable correlations between the various methods, as well as patterns of exposure consistent with proximity to fume source. 相似文献