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通过垃圾CFB焚烧实验,研究了垃圾焚烧产生烟气的生成机理及排放特性,得到了焚烧过程中床层温度、过量空气系数等参数对酸性烟气排放的影响。垃圾的CFB焚烧酸性烟气排放的实验结果表明:随床层温度的增加,烟气中NO、SO2、HCl排放浓度增加;随过量空气系数的增加,烟气中NO排放浓度开始增加迅速之后趋于平缓,SO2排放浓度增加,HCl排放浓度减小;随钙硫比的增加,烟气中NO排放浓度增加,SO2的排放浓度减小,HCl的排放浓度减小。 相似文献
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简略介绍了铝工业生产中产生的不同污染物及其实测浓度,同时按照最新环保排放浓度要求,分析了未来烟气净化技术的发展方向为无腐蚀、污水零排放前提下干湿法相结合的烟气净化技术。 相似文献
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《中国有色金属学报》2020,(9)
通过FactSage 7.2软件对铜冶炼烟道的气相体系进行热力学平衡研究,考察了温度、气相主要组分等因素对平衡烟气中SO_3含量的影响。此外,在固相催化实验平台,针对铜冶炼烟灰对SO_2催化氧化的影响进行了实验研究。结果表明:温度和烟气中O_2初始含量对SO_3的平衡浓度影响较大,烟气中SO_2初始含量对SO_3平衡浓度影响相对较小;铜冶炼烟道飞灰促进了烟气中SO_2向SO_3的转化。 相似文献
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烟气排放连续监测系统CEMS是监测烟气污染物排放的现代化手段.介绍了CEMS的数据采集与处理系统的结构组成和工作原理.该系统主要完成数据采集以及数据运算、统计、存储、合理性检查、删除等功能. 相似文献
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为了对焊接车间粉尘进行高效治理,对焊接车间粉尘分布规律进行了研究. 采用理论计算的方法,运用大气紊流扩散模型,考虑焊接车间作业点多且产尘复杂的情况,理论计算得到了实测多尘源情况下的粉尘分布. 与现场实测值进行了对比,验证了理论计算方法的可行性. 结果表明,单区域作业时,粉尘主要分布在测点13和测点14附近,两点处的粉尘浓度均为6.297 mg/m3;相邻区域作业时,粉尘主要分布在测点16附近,此处粉尘浓度为11.852 mg/m3;对角区域作业时,测点24附近的粉尘浓度最大,其浓度值为9.088 mg/m3,测点14和测点15附近的粉尘浓度也较大,其粉尘浓度均为6.284 mg/m3;多尘源共同作用区域粉尘有叠加. 相似文献
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Dust particles generated in thermal spray process can cause serious health problems to the workers. Dust particles generated in high velocity oxy-fuel (HVOF) spraying WC-Co coatings were characterized in terms of mass concentrations, particle size distribution, micro morphologies, and composition. Results show that the highest instantaneous exposure concentration of dust particles in the investigated thermal spray workshop is 140 mg/m3 and the time-weighted average concentration is 34.2 mg/m3, which are approximately 8 and 4 times higher than the occupational exposure limits in China, respectively. The large dust particles above 10 μm in size present a unique morphology of polygonal or irregular block of crushed powder, and smaller dust particles mainly exist in the form of irregular or flocculent agglomerates. Some heavy metals, such as chromium, cobalt, and nickel, are also found in the air of the workshop and their concentrations are higher than the limits. Potential occupational hazards of the dust particles in the thermal spray process are further analyzed based on their characteristics and the workers’ exposure to the nanoparticles is assessed using a control banding tool. 相似文献
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Removing as from converter dust by a hydrometallurgical method 总被引:2,自引:0,他引:2
Edita Vircikova Milan Havlik 《JOM Journal of the Minerals, Metals and Materials Society》1999,51(9):20-23
Research has been conducted at the Faculty of Metallurgy, Technical University, Kosice, to develop a hydrometallurgical method
for removing arsenic from copper converter dust. The process consists of a selective leaching of the flue dust in which arsenic
is dissolved in sodium-sulfide solution and then removed by precipitation methods using various agents: copper sulfate, a
mixture of phosphoric acid with calcium hydroxide, calcium oxide, and ferrous or ferric sulfate. In principle, arsenic can
be removed as a marketable product (copper arsenate for wood preservation) or as stable precipitate compounds suitable for
safe landfill disposal under existing U.S. Environmental Protection Agency regulations.
For more information, eontact E. Vircikova, Technical University, Faculty of Metallurgy, Letna 9, 04000 Kosice Slovakia; telephone
421-95-602-2703; fax 421-95-633-7048; e-mail vircik@hfnov.tuke.sk. 相似文献
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介绍了露天矿山铝土生产流程、产尘源及产尘设备。针对各产尘源的治理进行了分步分析。提出了治理措施。从而有效降低了铝土露天矿山生产过程中外排及岗位粉尘浓度。 相似文献
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主要介绍钢板预处理流水线中关键部分抛丸主机的工作原理、结构特点和适用范围。与国内现在使用的钢板预处理抛丸设备相,比该设备具有钢丸循环输送能力大、抛丸器量大、钢丸与氧化皮及铁锈的分离效率高、噪音以及粉尘排放浓度低等优点,因此具有很高的抛丸质量和生产率。 相似文献
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针对旋风除尘器的工作特点设计了双联旋风除尘器,使其在处理同样的风量时,除尘效率更高,内壁磨损更少,运行也更加可靠。 相似文献
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介绍了砂处理工部除尘系统设计中几个问题对除尘效果的影响。具体内容:(1)介绍了除尘系统的分段原则及其特点。(2)指出气温越低越易结露,对于北方寒冷地区,可以用增设加热装置提高含尘气流温度的方法防止结露。(3)认为吸口设在下部较上部收尘效果好。 相似文献