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电石渣是化工厂生产产生的固体废物,产生量大,酸废水是由电镀行业产生。电石渣主要成分为氧化钙,碱性极强,酸废水酸性极强,重金属含量极高,堆放和处理会造成严重环境污染,为实现废弃电石渣资源化再利用,本文使用废弃电石渣处理酸性废水进行了实验研究。本实验将废弃电石渣投加到酸废水中,在不断搅拌下,酸废水的颜色逐渐变浅,下层产生黄色沉淀,随着废弃电石渣加入量增多还会产生蓝色沉淀,中和试验结束后,溶液变得澄清透明,酸溶液的pH值由1.09全部变为碱性,实验结果显示在酸性废水中投加电石渣可中和酸性废水pH值并去除废水中的重金属,废水中铜、铁、锌的去除率均达到99%以上,在废弃电石渣的再利用和酸性废水处置方面均有较好的应用前景。 相似文献
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介绍了电石渣的危害及综合利用的意义。分析了利用电石渣治理酸性废水、反渗透浓水、含钙下游产品等的技术进展和工业化应用,提出利用电石渣制备活性氧化钙生产电石将成为电石渣资源化利用的观点。 相似文献
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文章介绍了一种以废治废的新工艺,该工艺利用电石渣代替烧碱作为中和沉淀剂处理电镀废水,不仅可以节约处理成本,而且使电石渣得到了综合利用,减轻环境污染,达到"以废治废"的目的,环境效益及经济效益显著。 相似文献
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《洁净煤技术》2021,27(3)
随着氯碱行业的持续发展,电石渣的排放及堆存量日益增长,造成了严重的环境污染、土地与钙资源浪费。针对电石渣的资源化利用难题,在分析电石渣组成、结构特点的基础上,对其在建材、化工材料和环保治理方面的研究进行综述,重点讨论了资源综合利用的问题及研究趋势。分析表明,电石渣粒径细、反应活性高,传统大规模消纳主要用于替代石灰石制备水泥等建工建材,但受到了国内市场趋于饱和、地理位置集中等限制;电石渣主要成分是氢氧化钙,可用于制备氧化钙、碳酸钙等化工产品,但受电石渣中杂质影响导致处理过程成本高、易造成二次污染;电石渣呈强碱性、消融性较好,在酸性废水和烟气脱硫等环境治理过程中性能优异,替代钙基吸收剂用于烟气脱硫,将成为电石渣综合利用的发展方向之一。综上,电石渣资源化利用具有显著的经济效益和环境效益,电石渣中的有害组分和杂质是限制电石渣利用的主要因素,同时应结合其地域特点,因地制宜综合考虑不同地区的利用方式,从而实现以废治废的循环理念。 相似文献
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文中对PVC厂电石渣母液的处理方法进行了研究,既先将电石渣母液用氧水除硫,再用1%废盐酸调解pH,最后用空气汽提除去母液中的乙炔气,处理后的母液达到了排放标准。该研究成果将作为上海天原化工厂“废水排放,苏州河整治改道工程项目”的设计依据。 相似文献
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<正> 西安化工厂在生产聚氯乙烯(PVC)过程中,氯乙烯单体工段每天约排放200立方米的酸性含汞废水。废水的含汞量高达3.67毫克/升。为了消除汞的污染,我们利用含硫离子和游离碱的电石渣作中和沉淀剂,来治理含汞废水。经治理后,水中汞残留浓度在0.01ppm以下,硫离子浓变在0.5ppm以下,达到了排放标准。一、实验部分 1.酸性含汞废水污染物和电石渣的测定结果(见表1、2) 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