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阐述了磷石膏烘干脱水后,粉状半水石膏的收集、磷石膏煅烧窑气净化除尘均应选择静电除尘器的必要性。根据电除尘器处理介质(烘干尾气与水泥窑气)的特性及操作条件,介绍了设计选型要考虑防爆、结露等问题,并提出相应改进措施。 相似文献
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针对石膏或磷石膏制备硫酸联产水泥的窑气特点,指出窑气净化工艺应考虑的问题,分析窑气净化工艺诸流程,认为进入净化工序前的窑气宜采用电除尘器除尘,净化工段宜把操作弹性大、阻力小的无填料洗涤塔(空塔)放在首段。 相似文献
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过去我国多以硫铁矿、硫磺为原料焙烧的气体或以冶炼尾气等(简称炉气,下同)制硫酸。近年来以石膏为原料(磷石膏、盐石膏、天然石膏等)煅烧的气体(简称窑气,下同)制硫酸正迅速发展,为此对窑气成份的测定有着重要的意义和要求。 相似文献
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分析了目前国内磷石膏利用面临的难题和必须解决的基本问题,提出了磷石膏资源化利用的创新思路及发展方向。磷石膏制硫酸联产水泥是磷石膏资源化利用的发展方向,主要有中空长窑法、预热器窑法和窑外分解法,其中窑外分解法采用竖罐来获得高浓度窑气,并添加矿化剂,无需添加天然石膏或硫磺,可使磷石膏的利用率提高至100%。 相似文献
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磷石膏制硫酸示范装置的操作 总被引:2,自引:0,他引:2
介绍了1t/h石膏制硫酸示范装置的工艺流程、操作经验及技术经济指标。这套装置全部使用磷石膏作原料,能生产出质量合格的硫酸和水泥。硫酸的生产成本和装置的综合建设投资都比硫铁矿制酸装置低。如果采用窑外分解技术,可进一步降低热耗,促进设备的大型化,并改善窑气质量。 相似文献
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介绍了国外利用石膏制硫酸联产水泥装置,对窑气组成,净化流程,干吸与水平衡、转化与热平衡、尾气回收等技术进行了重点评述。 相似文献
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介绍了以硬石膏为原料生产硫酸联产水泥装置的生产实践,提出了以磷石膏为原料生产硫酸联产水泥熟料的设计构想。通过分析磷石膏品质及原燃材料的预均化,将磷石膏烧制的水泥熟料与石灰石烧制的熟料按一定比例搭配制成水泥;采用新工艺、设备及严格的操作制度,以提高设备的热利用率。按新的设计思路,以磷石膏生产硫酸联产水泥熟料可将生产设备省去一半,投资降低40%以上,窑气中φ(SO2)可提高至10%~12%,回转窑的热效率达45%,熟料热耗6 100~6 500 kJ/kg。 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