带"三内"装置的φ4.75m×18m喷浆造粒干燥机的设计

介绍设计制造的φ4.75 m×1.8m带内返料、内筛分、内破碎装置的喷浆造粒干燥机,从"三内"技术分析入手,确定该设备基本结构及特点,介绍有关设计参数及使用情况.     

喷浆造粒干燥机筛分技术的研究和实践

总结了喷浆造粒干燥机内筛分技术的研究和工业应用情况，阐明了内筛分技术的原理和工业优化措施。为新型造粒机的设计或现有设备的改造提供参考。     

磷复肥喷浆造粒“三内”技术研究与开发(一)

介绍磷复肥喷浆造粒“三内”技术 ,该技术集喷浆造粒、分级、返料、破碎为一体在转筒内完成全过程 ,实现机头喷浆机尾出产品 ,粉体在筒内闭式循环造粒新技术     

带“三内”装置的φ4.75m×18m喷浆造料干燥机的设计

介绍设计制造的φ4.75 m×1.8m带内返料、内筛分、内破碎装置的喷浆造粒干燥机,从"三内"技术分析入手,确定该设备基本结构及特点,介绍有关设计参数及使用情况.     

内返料喷浆造粒干燥技术概述

内返料喷浆造粒干燥机集造粒、干燥、分级与破碎为一体 ,并广泛应用于化肥生产中。主要介绍了内返料喷浆造粒技术及其在国内外的发展过程     

磷复肥喷浆造粒内筛分技术的研究与应用

探讨了影响喷浆造粒内筛分的诸因素，提出强化筛分的措施并建立新型内筛分能力的计算式，为工程应用提供了理论依据。     

关于磷酸,磷铵,复混肥装置工程设计的若干意见（续）

中图分类号ＴＱ４４２．１４ＴＱ４４４３磷铵（１）磷铵生产方法的选择应以业主对产品要求而决定，如果产品为磷酸一铵（ＭＡＰ），规模不超过１２万吨／年，推荐用内筛分、内返料、内破碎喷浆造粒干燥技术。如果产品要求为磷酸二铵（ＤＡＰ）和ＭＡＰ，可采用预中和—氨...     

磷复肥喷浆造粒“三内”技术研究与开发(四)

介绍磷复肥喷浆造粒“三内技术”中的内破碎技术 ,建立颗粒物料破碎比、破碎量与三内技术的关系并提出内破的设计计算。     

喷浆造粒干燥机的改造

亚前言新密市化肥工业总公司年产3万t磷铵装置于1992年8月建成投产，其喷浆造粒干燥机采用的是“三内”（内返料、内筛分、内破碎）技术。“三内”技术虽然具有降低能耗、改善操作环境等优点，但也存在着一些弊端，经几次改造，效果比较理想。2存在的问题2．豆粒度控制难度大，内破碎负荷加重，由于大颗粒（超过φ3mm）重返机头，致使系统粒度偏大，为保证粒度指标只好减少喷浆量，进行重新破碎调整，每次花费时间都在5h左右，在调整过程中常出现成品外形不规则，具有细粉难以筛除，产品质量（粒度）无法保证。经观察分析，我们认为这一问题…     

磷铵喷浆造粒干燥“三内”技术近期研究进展

对我国１０年来磷铵喷浆造粒干燥机实现内分级、内破碎、内返料的一体化,即“三内”技术的发展和应用情况进行了总结,指出了“三内”技术目前的状况和已解决的主要问题。     

Electrolytes: From a Thorn Comes a Rose,and from a Rose,a Thorn

In this article we take a stroll through the metaphorical rose garden, part of the flower garden, that is electrochemical storage systems. We take a closer look at batteries as the center‐pieces – the roses – and especially at the system component of batteries, the electrolyte and its development, throughout history. Just as a rose can only develop its unique beauty when taken good care of and provided with clean water and suitable nutrients, a battery cell cannot function without its electrolyte; the seemingly trivial component that has to juggle a multitude of requirements in order to make batteries truly bloom.     

Extraction into a flow of a fluid with a velocity gradient

Unsteady extraction from a system of semi-infinite capillaries to the flow of a fluid with a linear velocity gradient is studied. An assumption that the diffusion in the flow is a quasi-steady-state process is taken to obtain a linear equation for the local mass flux from the pore space, which involves fractional derivatives with respect to time and flow coordinate. Limiting solutions for the total diffusion flux at small and large times that cover the entire time interval are found.     

Mesomorphic transitions in a mixture of a flexible and a semi-rigid polymer

Phase studies on a mixture of two polymers are presented, one of which is mesomorphic. We have systematically examined the influence of the molecular weight of the flexible polymer (including the oligomers) and of the semi-flexible polymer. In addition to the effect of the molecular weight, specific interactions are important for compatibility and formation of a homogeneous mesomorphic phase. The nature of this phase is demonstrated to be cholesteric and the pitch is determined.     

Propagation of a burning front over a condensed material from a focus

Measured propagation speeds are given for the combustion front in a blind gap in a condensed substance, which are related to gap height and mean pressure. The front may propagate monotonically, which is characteristic of relatively high pressures and wide gaps, or as a result of additional burning foci arising at a certain distance from the main front. At low pressures and particularly with small gap heights, the front propagates in an unstable fashion over the surface.Moscow. Translated from Fizika Goreniya i Vzryva, Vol. 28, No. 4, pp. 49–53, July–August, 1992.     

When is a Beam a Plate?

Formulas associated with simple beam or plate theories are used extensively in structural design, to determine You's modulus, and to determine fracture strength of brittle nonmetallic materials. The question may arise as to whether the proper ratio of beam-width-to-beam-depth is such that the bent structural element can be considered as a beam and, if not, what is the correction factor that should be used with the simple beam formula. These questions are answered for a range of structural metallic and brittle nonmetallic materials.     

Detonation of a Column of a Chemically Active Bubbly Medium in a Liquid

The problem of a detonation wave propagating in a cylindrical column of a chemically active bubbly medium screened by a liquid from the tube walls is formulated and numerically solved within the framework of the Iordanskii–Kogarko two-phase model with allowance for energy dissipation due to acoustic radiation of bubbles. The wave structure of the reaction zone and the detonation velocity of the bubbly medium column are calculated. It is found that the self-sustaining wave can propagate with a velocity greater than the velocity of one-dimensional bubble detonation by a factor of 1.5–2.5.     

Laminar flow deformation of a droplet adhering to a wall in a channel

We study the deformation of oil droplets of varying viscosity adhering to a solid, rigid wall in a rectangular channel induced by a pressure-driven, laminar flow of water. Our experimental investigation involves the systematic study of the effects of initial droplet volume, flow rate and viscosity ratio on the various modes of droplet motion and deformation; this is performed via direct visualisation of the flow in a glass cell using a high-speed camera. Our results are used to construct flow maps that delineate the critical conditions for droplet ‘sliding’, ‘crawling’ and detachment from the channel wall as a function of system parameters. Comparisons of our experimental results with numerical predictions obtained using a procedure based on the diffuse-interface method yield reasonably good agreement for certain flow regimes.