共查询到19条相似文献,搜索用时 109 毫秒
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通过对现用空调过滤材料和驻极材料进行性能对比测量,分析克重对过滤效率和阻力的影响,进而测量过滤材料和过滤器的性能差异、驻极材料的容尘性和“清洗”后效率,对驻极滤料的使用状况和应用前景进行探讨。 相似文献
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驻极体空气过滤材料消静电实验研究 总被引:1,自引:0,他引:1
选取4片不同级别的驻极体空气过滤材料,对滤料消除静电效应前后的计数效率和PM2.5净化效率等性能参数进行了试验研究,消静电方法采用的是异丙醇浸泡法,试验用气溶胶为KCl固态气溶胶。试验结果表明:采用异丙醇浸泡法能够在一定程度上消除驻极体过滤材料本身所带的静电;消除静电效应后滤料对不同粒径颗粒的计数效率均有所下降,特别是颗粒物粒径越小,过滤效率下降的幅度也越大;消静电后滤料对PM2.5的净化效率也有所下降。研究结果揭示了采用驻极体过滤材料制造而成的带静电过滤器在实际使用过程中可能存在的因静电消失后带来的效率下降风险,试验数据也能为将来空气过滤器国家相关标准的修订提供参考建议。 相似文献
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前言 目前表示初、中效过滤器过滤性能的指标一般用大气尘计数效率或人工尘计重效率表示,用户可依据该效率值以及阻力、容尘量等数据进行选用。但对于以过滤大气中生物粒子为主要目的的生物洁净系统来说,在滤料选择上就感到没有依据。而对测试滤料的滤 相似文献
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Particulate matter (PM) has taken heavy tolls on the global economy and public health, calling for air filters that can remove PM from high‐temperature emission sources. However, creating desirable filter media capable of capturing polydisperse fine particles (PFPs) effectively and enduringly, while also withstanding high speed airstream, is extremely challenging. Here, a biomimetic and bottom‐up strategy to prepare superelastic, strong, and thermostable nanofibrous aerogels (NFAs) as cascade filters by assembling semi‐interpenetrating polymer network (semi‐IPN)‐based nanofibers into a gradient architecture is reported. Inspired by the robust loofah sponges originating from stiff cellulose networks, the mechanical property of NFAs is enhanced via tailoring the chain flexibility of heat‐resistant semi‐IPNs. Further constructing a gradient cellular architecture endows NFAs with a versatile cascade filtration behavior for capturing polydisperse fine particles. The resultant semi‐IPN‐based gradient NFAs exhibit temperature‐invariant superelasticity, a high compressive stress (7.9 kPa) and modulus (12 kPa), high filtration efficiency (>99.97%, PM0.3), low pressure drop (≈50% that of membranes), and ultrahigh dust‐holding capacity (114 g m?2). The fabrication of this attractive material paves the way for designing next‐generation air filters for industrial dust removal. 相似文献
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Purification of pathogenic air has become an essential part of infection prevention and control. Most present air filters can hardly achieve excellent air filtration performance and the effective inactivation of the airborne pathogens at the same time. Herein, a bottom-up approach is reported upon to construct cage-like structured superflexible nanofibrous aerogels (CSAs) with renewable antimicrobial properties by combining electrospun silica nanofibers, bacterial cellulose nanofibers, and the hydrophobic Si O Si elastic binder. The following efficient grafting of N-halamine compounds endows the CSAs with biocidal function. The resultant aerogels exhibit intriguing features of high porosity, hydrophobicity, superelasticity, foldability, renewable chlorination ability (>5400 ppm), high filtration performance toward PM0.3 (>99.97%, 189 Pa), and excellent antibacterial and antiviral activity (6 logs reduction within 5 min contact), enabling the aerogels to intercept and inactivate the pathogenic contaminants in air. The successful synthesis of CSAs provides a new possibility to design high-performance air filtration materials for public health protection. 相似文献
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对佛山蝉城区中心医院新大楼手术部采用的多样性高度节能组合消毒净化空调系统的设计,检测和运行给予介绍,并与传统的三级过滤洁净空调系统进行综合性能比较。 相似文献
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针对一次回风空调系统室内颗粒状污染物的浓度场分布情况,采用数值仿真的方法,结合过滤器的临界过滤效率,得到当过滤器的组合效率不同时,增大新风比对室内颗粒状污染物的稀释效果也不同。在实际空调系统设计时,应结合经济运行,选择合适的过滤器组合及新风比。 相似文献
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介绍了独立新风系统的构成及特点,并在此基础上提出了对其系统改进的建议。根据该系统在一定室内外环境下的室内发尘量、过滤器效率和送风量的关系,确定系统设置,以提高室内空气品质。 相似文献