声波助清灰技术在滤筒除尘器中的应用研究

在试验的基础上，分析了声波助清灰技术对除尘效率的影响，并对各种清灰方式单独或组合使用的效果进行比较，最后对下一步的研究提出了一些建议。     

Poly(vinyl alcohol)/Compost Composites for Biofiltration of Swine Waste Volatiles

In this study, a Poly(vinyl alcohol)(PVA)/compost composite bead is prepared and is indicated suitable as a filter material for biofiltration. The optimal preparation process is with the compost size of 16–35 mesh, the ratio of water to compost of 40 g/15 g compost, and the immersion time in the phosphate solution of 60 min. The composite bead prepared by this process is a porous spherical particle with a diameter between 2.4 and 6.0 mm and a density of 0.96 g/cm³. It contains 9.43 mg P/g dry solid and 12.1 mg N/g dry solid. The equilibrium moisture content of the composite bead bed from adsorption and holding experiments is 50.5 and 54.6% on a wet basis respectively, which is about 1.74 times higher than that of swine manure compost bed. It corresponds to the optimal filter material required and is sufficient to sustain biological activity as the composite bead adsorbs equilibrium moisture. The bulk compressive strength of the composite bead bed is about 1.15 times larger than that of swine manure compost bed to ensure even distribution of air flow and reduce the head loss as the air flow stream passed through. The pH value of the filter bed could maintain in the 6.9–7.2 range during the operation period due to the composite bead has the phosphate buffer capacity. The percentage of ethyl acetate removal could remain at over 99% for 40 days operation while the composite beads adsorbed inorganic nitrate nutrients. The pressure drop of two kind composite beads and pig manure compost filter beds are 0 and 2 mm H₂O, respectively, after operating for 40 days.     

火电厂锅炉烟气电除尘与袋式除尘技术经济比较

阐述了电除尘器与袋式除尘器的技术差异,重点从净化效率、运行阻力、能耗、设备投资与占地等方面进行了技术经济对比.综合分析结果表明:火电厂锅炉烟气净化采用袋式除尘器的综合效益比电除尘器显著.     

针刺滤料过滤筒技术及应用探讨

本文分析了针刺滤料过滤简的技术特点、过滤原理及特性，并介绍了其在烟气除尘领域中的应用及实例。     

炼铁厂5号高炉槽下布袋除尘器改造

介绍了武钢炼铁厂5号高炉槽下布袋除尘器改造所用袋式除尘器的特点和主要设计方案及取得的效果.     

A/O一体式曝气生物滤池处理生活污水

在原水水力负荷为1．1m/h，回流比为2的条件下，考察了缺氧－好氧一体式生物滤池在气水比为4∶1、5∶1和6∶1工况下对生活污水的处理效果。研究结果表明，对生活污水有着良好的处理效果，处理出水可稳定地达到国家二级排放标准。随着气水比的增加，系统对COD、BOD5和氨氮的去除率有所提高，缺氧－好氧暴气一体式生物滤池具有良好的硝化、反硝化效果。硝化作用主要在好氧区完成，反硝化作用在缺氧区45cm处即可完成。     

非稳态过滤除尘压力损失的研究

提出用于建立过滤层非稳态过滤压力损失模型的微观分析法和宏观分析法新概念，归纳出无论是纤维层过滤，还是颗粒层过滤，所反映的压力损失随过滤时间变化的规律是相同的，由此提出筇同观分析法和宏观分析法相结合的对纤维层过滤和颗粒层过滤均适用的非稳态过滤简化式，通过实验探讨了非稳态过滤压力损失比例常数的确定方法，并由此验证了该简化式的正确性。     

高炉煤气全干式布袋除尘净化技术

通过对国内外大中型高炉煤气除尘系统的分析比较，对高炉煤气除尘系统几个重大技术问题提出自己的见解，并指出新建、改建、扩建大中型高炉为避免重复投资，应不建湿式除尘系统备用，而向建干式布袋除尘方向发展。     

BACTERIAL LEVELS IN CISTERN WATER SYSTEMS OF NORTHERN KENTUCKY1

ABSTRACT: In rural Northern Kentucky, rainwater is commonly collected from rooftops and stored in cement block cisterns as the sole source of drinking water. Although every cistern system is unique in some aspect of design, use, or maintenance, a bacterial survey of 30 rural Northern Kentucky cistern systems suggests that coliforms and heterotrophic bacteria are common to all types of cistern storage systems. An average of 600 coliforms/ml and 3.6 ± 10⁵ heterotrophic bacteria/ml were detected in water samples from the bottoms of the cistern storage tanks. Bacterial levels in water delivered to household cold tap faucets were similar to the levels found in the storage tanks. When detected, fecal coliforms were recovered throughout the entire system including the household cold tap faucet. Current U.S. regulations for drinking water quality are discussed, with a suggestion that fecal coliform levels may be a more appropriate guideline for interpreting the water quality of individually maintained, nonchlorinated, nonpiped water supplies, such as cistern storage systems.     

KALMAN FILTER ESTIMATION AND PREDICTION OF DAILY STREAM FLOWS: II. APPLICATION TO THE POTOMAC RIVER1

Results are reported from an application of the state space formulation and the Kalman filter to real-time forecasting of daily river flows. It is shown that the application of filtering techniques improves the overall forecasting performance of the model. As is true for most hydrologic systems, the model is not completely known. Therefore, the procedures pertaining to on-line parameter and noise statistics estimation, as presented in the first paper, are implemented. The example in this paper shows that these techniques also perform satisfactorily when applied to a real-world situation.