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本文意义在于: ①阐明“余压”利用的意义并特别提出蒸汽压缩中合理选择压缩比等问题。②系统推导出理想流体与实际流体的压力有效能的计算方法、算式及计算机程序。对多组分的流体的压力能与压力有效能计算有特别重要的作用。 (广州市化工学会论文) 相似文献
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The volatilization behavior of Cu, Pb, Sn, Sb, Ni, Zn, Mn, Co, Cr, Cd during pyrolysis of waste printed circuit boards was investigated in a bench-scale fixed-bed pyrolysis system. It was found that volatility of heavy metals increases with operating temperature elevating, and bromine and vacuum have an obvious promoting effect on volatility of most of heavy metals. Over 99% weight of Cu and Ni are still remained in solid residue after pyrolysis, about 20% weight of Sb, Zn and Cd are transfered into liquid and gas during a pyrolysis process at 600 ℃, volatilization fractions of Pb, Sn, Mn, Co, Cr are less than 10% at the same conditions. The contents of heavy metals in liquid and gas products depend on not only volatility of metals, but also their initial contents in printed circuit boards, pyrolysis liquid and gas are primarily contaminated by Cu, Pb, Sn, Sb and Zn, their contents in liquid vary from 10^2 to 10^3 pg/mL, Mn, Co, Cr, Cd were detected only at very low level, less than 10 μg/mL. 相似文献
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利用ADS 仿真设计射频宽带低噪声放大器 总被引:3,自引:3,他引:0
主要介绍了运用Agilent 公司的ADS 仿真软件进行宽带低噪声放大器的设计和仿真。选用FUJITSU 公司生产的砷化镓场效应管FHX13X,用ADS 软件进行设计、仿真和优化,实现了在2.5 GHz~3.5 GHz 较宽频带范围内,单级和两级宽带低噪声放大器的设计。 相似文献
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在阐述OTN设备技术特点的基础上,与其他传送方式在经济性及便利性等方面进行了比较,给出了本地OTN承载业务的建议,并以案例论述了本地OTN在工程中的具体应用。 相似文献
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采用气相色谱-质谱(GC/MS)、高效液相色谱(HPLC)、等离子发射光谱(ICP)等调查了碳酸钙存在下废旧电路板热解油的组成特征,探讨了碳酸钙对热解油性能和组成的影响.结果表明碳酸钙不仅能吸附热解过程产生的溴化氢,还能有效降低有机溴化物、重金属等有毒有害组分在热解油中的浓度,并提高苯酚、对异丙基苯酚等有价组分的含量.碳酸钙存在下的电路板热解油主要由这质量分数68%的酚、7.61%的溴代苯酚和溴代双酚A、16.32%的水以及2.07%氨和铵离子组成,其中苯酚和对异丙基苯酚的含量达到55.6%以上,具有很高分离回收价值. 相似文献
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