双稳态电控变流型送风口的研制

设计并研制了一种双稳态电控变流型送风口,并介绍了该装置的结构、工作原理和性能特点.该送风口冬夏可以送不同流型气流,符合气流组织原则,运行管理方便、容易调节、可以远距离控制,而且节能.     

双级液体去湿冷却空调性能分析

本文介绍了双级液体去湿冷却空调系统的工作原理,分析了系统的吸湿和再生性能、热损失及火用效率.较单级系统而言,双级空调系统具有良好的整体性能与节能效益,在使用低温热源上有较大优势.     

精馏意识在空分系统操作中的运用

介绍精馏意识在空分系统操作中运用 ,举例说明了一种从全局角度考虑问题的方法 ,使操作更有预见性 ,保持精馏工况的稳定性。     

主换热器热端温差过大的原因分析和处理

分析 6 0 0 0m3 /h空分装置检修后开车过程中出现的主换热器热端温差过大的原因 ,并介绍了处理办法     

在制氧机开车状态下处理导叶阀电机故障

由于进口导叶阀电机突然损坏 ,冷水机组出口水温升高 ,使制氧工况恶化 ,在制氧机不能停机的状况下 ,处理了这一起故障 ,使制氧机得以连续运行。     

多台离心式压缩机集中运行及其系统控制

启明星电解铝厂空压站共设计六台离心式压缩机，为电解、氧化铝输送、炭素阳极生产提供压缩空气。本文针对实现压缩机节能、平均寿命等模式，叙述单台离心式压缩机控制原理和六台压缩机CES集中运行及其系统控制，为故障分析提供解决途径。     

Conversion of Full-Scale Wet Scrubbers to Biotrickling Filters for H2S Control at Publicly Owned Treatment Works

Until recently, biological treatment of odors in biofilters or biotrickling filters was thought to require a longer gas contact time than chemical scrubbing, hence bioreactors for air treatment required a larger footprint. This paper discusses the conversion of chemical scrubbers to biological trickling filters. Initially, research was conducted with a laboratory-scale biotrickling filter. An effective open-pore polyurethane packing material was identified and H2S biotreatment performance was quantified. Key technical issues in determining the general suitability of converting wet scrubbers to biotrickling filters were identified, and a generic ten-step conversion procedure was developed. Following the laboratory research, five full-scale chemical scrubbers treating odorous air at the Sanitation District of Orange County, Calif., were converted to biotrickling filters. The original airflow rate was maintained, resulting in a gas contact time as low as 1.6–3.1?s. The converted biotrickling filters demonstrated an excellent capability for treating high H2S concentrations to concentrations below regulatory limits. This study shows outstanding potential for converting chemical scrubbers to biotrickling filters at publicly owned treatment works.     

Control of Molybdenum Emission by Sorbents: Equilibrium Analysis

Emissions from fossil fuel combustion containing various heavy metals such as molybdenum are of public concern due to their adverse effects on human health and the environment. In this study, thermodynamic analyses were applied to determine the potential of sorbent technology to control molybdenum emissions from combustion sources. The effectiveness of four sorbents (Ca, Fe, Mg and Na based) was assessed for a wide range of temperatures. The adverse effects of chlorine and sulfur were also examined. Ca and Na-based sorbents were identified to be effective.     

Influence of Sodium Dodecyl Sulfate and Tween 20 on Fungal Growth and Toluene Degradation in a Vapor-Phase Bioreactor

Biofiltration, a process in which contaminated air is passed through a biologically active bed, can be used to remove volatile organic pollutants from air streams. While most biofilters rely on bacteria to degrade organic pollutants, biofilters utilizing a fungal biofilm have the potential to be an efficient and robust treatment alternative. In this study, two surfactants were evaluated for their ability to activate the spores of the fungus Exophiala lecanii-corni and reduce the start-up period typically observed in fungal vapor-phase bioreactors. Sodium dodecyl sulfate, an anionic surfactant, was found to inhibit growth of E. lecanii-corni. Polyoxyethylene sorbitan monolaurate (Tween 20), a nonionic surfactant, stimulated bud formation and enhanced toluene degradation in E. lecanii-corni cultures. Tween 20 was also found to enhance inoculum development by shortening the lag period during culture growth. However, when bioreactors were presoaked in medium containing Tween 20, washout of the fungal cells occurred during inoculation, inhibiting the initial fungal biofilm development. After a seven-day start-up period, no detrimental effects on reactor performance due to residual Tween 20 were observed, and toluene elimination capacities of up to 150?g/m3?h were achieved.     

离心压缩机组冷态找正数据的分析与精确计算

针对在安装引进的离心压缩机组中发现的原机组冷态找正数据与实测值不符的情况，介绍了其试验的方法，并提出了一种行之有效的精确计算方法。用该方法计算了该压缩机组的冷态找正数据，并与实测数据作了比较。从而证明该计算方法的可行性及正确性。