共查询到20条相似文献,搜索用时 93 毫秒
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从洛阳石化聚丙烯有限责任公司的整体利益出发,阐述了进一步提高造粒机组生产负荷的方法;计算了提高负荷的最大理论值;重点对计量秤改进、造粒机模板改造的具体方法进行论证;实施后造粒机生产负荷由原来的9.5t/h提高到10.2t/h,取得了良好的效益。 相似文献
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从造粒机结构和生产工艺方面研究湿法造粒炭黑质量的提升。造粒机结构方面,合理设定搅齿与壳体间隙、搅齿密度和作用区长度并增大齿尖硬度,采用大直径主轴、保证内壁光洁度和均匀性、环状多孔喷水均有利于提高造粒质量;工艺方面,通过计算合理选择水量和粘结剂用量、控制造粒水和机筒壁温度可提高造粒质量。 相似文献
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河南内乡化肥使用江苏省扬中博爱化工机械厂对辊冷压造粒设备生产碳铵系复混肥,很受农民的欢迎,产品供不应求。现介绍如下。1 对辊冷压造粒设备适宜生产碳铵系复混肥目前,我国复混肥加工的造粒设备有:盘模挤出式造粒机、转鼓式造粒机、圆盘式造粒机和对辊式冷压造粒机4种。转鼓和圆盘造粒的物料成型机理相同,是利用物料和粘结剂间的粘合力,使粉状物料团聚成颗粒,湿颗粒的强度较低,必须经过干燥,提高产品强度,因此,碳铵不能作为其基础肥料。挤压造粒对碳铵物料也不适宜。当造粒机碾轮转动时,其与模板摩擦而产生较多热量,使造… 相似文献
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转鼓造粒机是复合(混)肥生产的关键设备之一,它的作用是使粉状物料在筒体内进行预造粒,形成粒径1—2mm的微小颗粒。转鼓造粒机的造粒效果将直接影响成球率和产品质量。 相似文献
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简要介绍造粒机的主要构件(包括造粒机尺寸、造粒机胶板、造粒机大梁、管式反应器混合头、管式反应器喷口、二次补氨管及氨支腿、大梁除疤器、造粒机口圈、抛疤器等)对磷酸二铵喷浆法造粒所产生的影响。通过优化造粒设备主要构件,产品的外观质量得到明显提高。 相似文献
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针对尿素流化床造粒装置在实物造粒阶段出现造粒机严重死床问题,结合后阶段实际开车情况对死床原因进行分析,对造粒机的设计提出建议。 相似文献
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针对旧式旋转式尿素造粒机存在的尿素溢流、运行周期短等问题,开发设计一种新型造粒机,并介绍了新造粒机的使用情况。我公司现年产尿素260kt,采用塔式造粒。尿素造粒机是造粒工序的关键设备,其性能好坏直接影响尿素系统生产的稳定。“八五”期间,我公司尿素产量翻番扩建时,采用了A型造粒机,经过改造,基本运行正常,但由于喷头部件不如人意,尿素粒度不理想。使用一年半后,该机“退役”,改用了B型造粒机。B型造粒机的使用,特别是新型喷头的应用,使尿素产品外观质量跃上了一个台阶。但是,其造粒主机部分运行状况欠佳。 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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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献