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<正>脉冲自洁式空气过滤器LYG型脉冲自洁式空气过滤器是一种处理风量大,过滤精度高,阻力低,滤芯使用寿命长且边工作边喷吹边自洁的过滤器。     

产品推荐

<正>脉冲自洁式空气过滤器LYG型脉冲自洁式空气过滤器是一种处理风量大,过滤精度高,阻力低,滤芯使用寿命长且边工作边喷吹边自洁的过滤器。它广泛用于大流量的各行业压缩机站,钢铁     

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<正>脉冲自洁式空气过滤器LYG型脉冲自洁式空气过滤器是一种处理风量大,过滤精度高,阻力低,滤芯使用寿命长且边工作边喷吹边自洁的过滤器。它广泛用于大流量的各行业压缩机站,钢铁厂的高炉鼓风机,制氧站的原料空压机、燃气轮机、化纤纺织行业空调送风系统,以及化工氯碱厂的离心风机进气过滤。由于采用PLC控制可以与中心控制室联网,监控过     

滤芯褶数对气体过滤器流体动力学性能影响的研究

基于三维褶模型,采用CFD技术对空气过滤器性能进行数值模拟计算,使用FLUENT软件中的多孔介质模型对空气过滤器进行了流体动力学分析。结果表明,增大进口风量会使过滤器阻力增大;增加滤芯褶数会增大过滤器的有效过滤面积,增大有效过滤面积可以降低过滤速度,从而减小滤芯过滤阻力。然而这种增加不是无限制的,增加褶数会减小褶间距,过小的褶间距会导致气流局部紊乱,气体间摩擦阻力增大,从而使得整个过滤器阻力增大。对于一定尺寸的过滤器存在一个最优的褶数使得过滤阻力最小。     

电镀工业中的过滤技术

日本金属精整工业中的过滤器和电镀液的过滤方法正随着表面装饰电镀向功能电镀的转变而发展。一般的径向滤叶预敷层过滤器和缠绕式滤芯过滤器已经广泛应用。连续带式电镀中用的自动洗涤式过滤器和电镀工业环境保护中用的过滤系统也都得到了发展和利用。     

空气过滤试验标准国内外现状浅析

主要介绍采用粒子计数法的试验标准,代表性的有:GB/T 14295-2008《空气过滤器》、EN 779:2012《一般通风过滤器过滤性能的测定》、EN1822:2009《高效率空气过滤器》、ISO/TS 11155-1:2001《道路车辆乘驾室用空气滤清器第一部分:粉尘过滤测试》、ANSI/ASHRAE 52.2-2012《一般通风空气过滤器计径效率试验方法》,从过滤器分级、试验尘源、试验方法等方面对上述标准进行分析和对比。     

天津市德清泓华过滤设备有限公司

天津市德清泓华过滤设备有限公司是国内螺杆压缩机制造业过滤器的OEM供应商,可满足世界各品牌螺杆压缩机油气分离滤芯、机油过滤器、空气过滤器的生产与销售。凭借20年螺杆压缩机油气分离技术之积累,可为用户提供质优、长寿之产品及过滤技术之咨询。     

如何设计节能型工业压缩空气系统(二)

过滤器的能量效应 影响压缩空气过滤器的能量效应有两个因素:过滤效果和压力降。不必对一个系统的空气过滤要求规定过高。因为空气过滤器在系统中可能提供最大的单点压力降2～7磅/英寸～2。注意,在100磅/英寸～2工作压力下配气系统中每损耗 1磅/英寸～2将导致压缩机能源消耗增加0.7％。     

机车用的新型空气过滤器

针对传统过滤器存在的诸多弊病。经过潜心研究和大量试验，终于开发出了机车新型空气过滤器，彻底解决了传统结构存在的问题，而且得以大量推广。     

驻极体空气过滤器用于燃气轮机末滤的效率特性

某燃气轮机机组使用驻极体空气过滤器作为末级过滤,一段时间后出现效率曲线快速下降、压气机水洗频率增加等异常。基于EN 779—2012标准,在EN3600实验台等试验设备上设计了褶尖检测试验和多工况效率试验。结果表明,驻极体空气过滤器静电效应随使用时长增加下降过快;对于需长期连续使用的过滤系统末级,在静电电荷逸失较快的问题未得到改善之前,应慎重选用驻极体过滤器。研究结果可为相关从业人员的设计、选型和科研提供参考。     

两种空气过滤器的性能比较及改进措施

本文对两种空压机机前过滤器进行了简要介绍,并分别从过滤效果、使用寿命、吸风口、大气环境和滤料等方面的特性进行了比较分析,最后对自洁式过滤器使用中出现的问题提出了维护办法.     

Particle deposition in random fibrous porous materials: effect of acoustic fields,fibres distribution and porosity

Porous filters are widely used to control air pollution and have different industrial applications since they constitute a reliable and low cost solution to separate particulate matter from an air stream.In this study, the particle deposition within 3D porous filters subjected to low-frequency acoustic fields is studied following a numerical approach. Findings demonstrate that the application of acoustic waves enhançes the deposition of particles, which in turn improves filter performance. It is shown that frequencies ranging from 200 to 1000 Hz (intensity 120 dB) increase particle deposition up to 2.5 times. Besides, the manner in which fibres are distributed in the porous material and the filter porosity affect considerably the number of particles deposited, for filters subjected to the same filtration velocity.     

Large-scale generic test stand for testing of multiple configurations of air filters utilizing a range of particle size distributions

The Institute for Clean Energy Technology (ICET) at Mississippi State University has developed a test stand capable of lifecycle testing of high efficiency particulate air filters and other filters specified in American Society of Mechanical Engineers Code on Nuclear Air and Gas Treatment (AG-1) filters. The test stand is currently equipped to test AG-1 Section FK radial flow filters, and expansion is currently underway to increase testing capabilities for other types of AG-1 filters. The test stand is capable of producing differential pressures of 12.45 kPa (50 in. w.c.) at volumetric air flow rates up to 113.3 m(3)/min (4000 CFM). Testing is performed at elevated and ambient conditions for temperature and relative humidity. Current testing utilizes three challenge aerosols: carbon black, alumina, and Arizona road dust (A1-Ultrafine). Each aerosol has a different mass median diameter to test loading over a wide range of particles sizes. The test stand is designed to monitor and maintain relative humidity and temperature to required specifications. Instrumentation is implemented on the upstream and downstream sections of the test stand as well as on the filter housing itself. Representative data are presented herein illustrating the test stand's capabilities. Digital images of the filter pack collected during and after testing is displayed after the representative data are discussed. In conclusion, the ICET test stand with AG-1 filter testing capabilities has been developed and hurdles such as test parameter stability and design flexibility overcome.     

高效空气过滤材料的特性及检测方法研究进展

主要介绍了高效空气过滤材料的特性以及检测方法,分析了国内外高效空气过滤材料的现状,并提出了下一步的研究方向.     

A setup for monitoring radon in air by aerosol filters

A new method for monitoring radon concentrations in air, which is based on measuring the γ activity of aerosol filters, through which air is uninterruptedly circulated, is described. In this case, the equilibrium concentration of decay products on the filter is proportional to the radon concentration in air. The use of a large (20 (diameter) - 20 cm) NaI(Tl) crystal with a well for realizing a 4π-geometry ensures a 15-to 20% error of the method.     

Permeability effects of the ceramic candle filter on back-pulse cleaning system

The flow characteristics inside the ceramic candle filter system used in hot gas cleanup was investigated. The filter system admits high pressure back-pulse air to blow out the dust cake. The pressure drop across the filter barrier plays a critical role in dust removal. The filter medium and dust cakes were considered as multi-layered porous media and were then modeled using Darcy’s effective permeability model. Theκ-ε model was adopted to study the turbulent flow in the filter system using FLUENT. A parametric study of the permeability of the filter media was performed to investigate the effects of dust cakes on the flow phenomena, in conjunction with the non-Darcian effect of the porous media flow and non-homogeneous boundary conditions in the inlet and the outlet.     

Sample preparation method for visualization of nanoparticulate captured on mixed cellulose ester filter media by enhanced darkfield microscopy and hyperspectral imaging

A significant hurdle in conducting effective health and safety hazard analysis and risk assessment for the nanotechnology workforce is the lack of a rapid method for the direct visualization and analysis of filter media used to sample nanomaterials from work environments that represent potential worker exposure. Current best‐known methods include transmission electron microscopy (TEM) coupled with energy dispersive x‐ray spectroscopy (EDS) for elemental identification. TEM‐EDS is considerably time‐, cost‐, and resource‐intensive, which may prevent timely health and safety recommendations and corrective actions. A rapid screening method is currently being explored using enhanced darkfield microscopy with hyperspectral imaging (EDFM‐HSI). For this approach to be effective, rapid, and easy, sample preparation that is amenable to the analytical technique is needed. Here, we compare the sample preparation steps for mixed cellulose ester (MCE) filter media specified in NIOSH Method 7400—Asbestos and Other Fibers by Phase Contrast Microscopy (PCM)—against a new method, which involves saturation of the filter media with acetone. NIOSH Method 7400 was chosen as a starting point since it is an established technique for preparing transparent MCE filters for optical microscopy. Limitations in this method led to the development and comparison of a new method. The new method was faster, easier, and rendered filters more transparent, resulting in improved visualization and analysis of nanomaterials via EDFM‐HSI. This new method is suitable for a rapid screening protocol due to its speed, ease of use, and the improvement in image acquisition and analysis.     

Comments on the paper 'A novel 3D wavelet-based filter for visualizing features in noisy biological data', by Moss et al.

Moss et al. (2005) describe, in a recent paper, a filter that they use to detect lines. We noticed that the wavelet on which this filter is based is a difference of uniform filters. This filter is an approximation to the second‐derivative operator, which is commonly implemented as the Laplace of Gaussian (or Marr–Hildreth) operator. We have compared Moss' filter with (1) the Laplace of Gaussian operator, (2) an approximation of the Laplace of Gaussian using uniform filters and (3) a few common noise reduction filters. The Laplace‐like operators detect lines by suppressing image features both larger and smaller than the filter size. The noise reduction filters only suppress image features smaller than the filter size. By estimating the signal‐to‐noise ratio and mean square difference of the filtered results, we found that the filter proposed by Moss et al. does not outperform the Laplace of Gaussian operator. We also found that for images with extreme noise content, line detection filters perform better than the noise reduction filters when trying to enhance line structures. In less extreme cases of noise, the standard noise reduction filters perform significantly better than both the Laplace of Gaussian and Moss' filter.     

Polychromatic Hilbert diagnostics of the evolution of vortex rings induced by a pressure jump on a hole

The evolution of vortex structures induced by a pressure jump on the output hole of the chamber is experimentally studied by methods of the Hilbert diagnostics. Various types of optical filters that ensure the Hilbert and Foucault-Hilbert transforms are considered. Colored visualization of the fields of the phase optical density of the vortex structure in an air medium is performed by using a linear source of white light and a quadrature Hilbert filter.