共查询到20条相似文献,搜索用时 78 毫秒
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<正> 同向流斜板沉淀技术1967年首先在瑞典问世。我国1973年开始试验研究同向流斜板沉淀装置。在此基础上,各地先后兴建了七座同向流斜板沉淀池。1979年5月在天津召开了全国同向流斜板沉淀技术讨论会,重点研究了生产运转中存在的主要问题—板间积泥,配集水不均匀、集水装置孔眼堵塞、排泥不畅等,提出了改进的措施,对同向流斜板沉淀的试验、研究、设计、生产起了推动作用。 相似文献
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斜板沉淀器在炼钢连铸水处理中的应用 总被引:2,自引:0,他引:2
斜板沉淀器在炼钢连铸水处理中的应用承德钢铁集团有限公司设计研究院(河北承德,067002)曹春玲承德钢铁股份有限公司炼钢厂李春和斜板沉淀器是近年来发展起来的新型水处理设备。它与传统的平流沉淀池相比具有占地面积小。沉淀效果好、运行费用及检修费用低和减少... 相似文献
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针对深圳某水厂斜管沉淀池沉淀效果差、排泥不畅、沉后水浑浊度偏高,最终导致滤池过滤周期短、滤后水及出厂水浑浊度偏高等问题,将斜管沉淀池改造为A型侧向流斜板沉淀池。改造并优化完成后,沉淀池空间利用率更高,运行更加平稳,对原水水质波动的抗冲击能力也有一定提升。对比相同工艺改造前后的水质效果,发现经过改造优化后,因进水导流区及运行死角的消除,沉淀池运行有效容积由74.1%提升至100.0%,沉后水平均浑浊度下降26%,平均值在0.51 NTU,滤后水平均浑浊度下降19%,平均值为0.13 NTU。运行结果表明,A型侧向流斜板沉淀池改造效果显著,适用于存在相似问题的中小型水厂。 相似文献
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《高校化学工程学报》2017,(3)
针对传统弓形折流板支撑多管束受限外流流动死区大,压降高的问题,提出新型斜百叶片折流板支撑多管束结构。通过全三维数值模拟,研究斜百叶片支撑多管束受限外流的传热和阻力特性,获得其局部流场,分析了不同斜百叶片倾角对其性能的影响。研究结果表明:斜百叶片支撑多管束受限外流流场分布均匀,流动死区小;与传统弓形折流板支撑的情况相比,压降减小17.1%~45.7%,功耗显著降低,且随斜百叶倾角减小而减小;倾角为45o时具有最优综合性能,相同压降下的传热系数比弓形折流板支撑的情况可提高25.9%。研究结果可为新型低功耗管壳式换热设备的开发和设计提供参考。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献