共查询到20条相似文献,搜索用时 156 毫秒
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我厂配煤系统共有8个配煤槽,过去采用园盘给料,人工跑盘,工人劳动强度大,配煤准确率低。在学习兄弟厂家自动配煤经验后,采取了公开招标的方法,仅用较少的投资择优选择了北京金日仪器公司研制的核子秤自动配煤系统。经过不到1个月 相似文献
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本钢焦化厂8#、9#焦炉配煤系统自2008年末投产以来,从现场实际出发,对影响配煤准确率的各种因素进行了调整,使配煤准确率提高并稳定在90%以上,有效控制了炼焦成本,保证了焦炭质量,取得了良好的经济效益. 相似文献
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胡参军 《煤炭加工与综合利用》2007,(5):26-27
陈四楼选煤厂针对原手动配煤系统生产末原煤产品存在的问题,采用自动配煤系统对其进行改造;介绍了改造的技术路线、自动控制系统结构及软硬件组成情况;实践表明,配煤系统的自动化,提高了配煤的稳定性和精度,增加了选煤厂的经济效益。 相似文献
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系统论述了动力配煤的主要技术,对配煤模型、配煤工艺进行了重点研究。并在此基础上,设计了基于煤质全元素在线检测技术的配煤自动控制系统,为实施配煤自动控制提供了一种新的方法。 相似文献
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《煤炭加工与综合利用》2017,(7)
新景矿选煤厂针对原人工配煤系统存在的问题进行了改造,论述了改造后配煤自动化控制系统的结构、工作原理和功能等;自动配煤在该选煤厂应用后,取得了很好的效果,为企业带来了良好的经济效益和社会效益。 相似文献
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介绍了新型自动配煤控制系统,采用电子秤替代核子秤,工艺配置中取消了称量带式输送机,通过减差进行配料,减少了中间环节,能够满足配煤技术要求。系统运行稳定,配煤合格率高,经济效益好。 相似文献
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The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion. 相似文献
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Claver IP Zhang H Li Q Zhu K Zhou H 《International journal of molecular sciences》2010,11(8):3002-3015
Starches were isolated from soaked and malted sorghum and studied to understand their physicochemical and functional properties. The swelling power (SP) and the water solubility index (WSI) of both starches were nearly similar at temperatures below 50 °C, but at more than 50 °C, the starch isolated from malted sorghum showed lower SP and high WSI than those isolated from raw and soaked sorghum. The pasting properties of starches determined by rapid visco-analyzer (RVA) showed that malted sorghum starch had a lower viscosity peak value (86 BU/RVU) than raw sorghum starch (454 BU/RVU). For both sorghum, X-ray diffractograms exhibited an A-type diffraction pattern, typical of cereal starches and the relative degrees of crystallinity ranged from 9.62 to 15.50%. Differential scanning calorimetry (DSC) revealed that raw sorghum starch showed an endotherm with a peak temperature (Tp) at 78.06 °C and gelatinization enthalpies of 2.83 J/g whereas five-day malted sorghum starch had a Tp at 47.22 °C and gelatinization enthalpies of 2.06 J/g. Storage modulus (G') and loss modulus (G″) of all starch suspensions increased steeply to a maximum at 70 °C and then decreased with continuous heating. The structural analysis of malted sorghum starch showed porosity on the granule's surface susceptible to the amylolysis. The results showed that physicochemical and functional properties of sorghum starches are influenced by soaking and malting methods. 相似文献
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催化装置粗汽油回炼技术在有效降低催化稳定汽油烯烃含量的同时,对催化装置产品分布产生明显的影响,继而影响到装置的综合经济效益。本文对不同粗汽油回炼量条件下,催化装置稳定汽油性质和产品分布变化趋势进行分析,对经济效益进行对比,阐明应用粗汽油回炼降低汽油烯烃技术时,要选择合适的操作条件,以期得到较好的综合经济效益。 相似文献