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介绍了泸天化与海德鲁(HYDRO)公司就生产大颗粒尿素流化床造粒技术进行交流会谈情况,主要设备及生产流程介绍,重点探讨了一些实际生产中的具体技术问题。 相似文献
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本文介绍了沪天化公司与海德鲁公司就流化床造粒技术进行交流会谈的情况,重点介绍了一些生产实际中的具体技术问题,可供有意扩建或准备改产大颗粒尿素的厂家作为参考。 相似文献
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公司300kt/a大颗粒尿素系统装置,造粒工艺是采用挪威海德鲁流化床造粒工艺。大颗粒尿素系统刚投产初期,造粒机运行不稳定,冲洗次数频繁,每月至少冲洗造粒机2~3次。极大影响了尿素产量及消耗。经过车间技术人员多次指标调整及工艺改造。降低了尿素成本。减少了排污总量。造粒机运行周期大大延长。有效地提高了尿素产量。 相似文献
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针对海德鲁流化床大颗粒尿素造粒装置在实际生产中存在粉尘量大的问题,分析了粉尘的来源及其危害,并从源头控制和粉尘后处理2个方面采取了相应的改进措施。改进措施实施后,使海德鲁流化床大颗粒尿素造粒装置的粉尘量得到有效控制,现场工作环境得到明显改善。 相似文献
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对严重影响大颗粒尿素流化床造粒机尿液喷射系统正常运行的多项故障进行了剖析,从生产技术改造及操作管理方面提出了改进和防范措施,结果表明,改进后装置运行周期从不足10天延长到40天。 相似文献
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分析了大颗粒尿素造粒装置流化床造粒机死床的现象、原因,介绍了所采取的措施及其取得的效果。 相似文献
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重点对流化床造粒机第1室屡次出现尿素大块的原因进行分析,主要是由于前系统夹带来的杂质使喷头卡涩,影响转子正常旋转所致.研究了喷头卡涩的现象和造粒机第1室的流化情况,提出喷头维护和工艺操作的一些措施与建议,造粒机运行周期明显延长. 相似文献
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介绍了沪天化公司与海德鲁公司就流化床造粒技术进行交流会谈的情况,重点介绍了一些生产实际中的具体技术问题,可供有意扩建或准备改产大颗粒尿素的厂家作为参考。 相似文献
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从造粒机流化空气风量、熔融尿液泵汽化、蒸发系统真空度、尿液喷头卡涩4个方面,分析流化床造粒机的典型故障成因,提出解决措施。 相似文献
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对造粒机运行过程中出现的问题进行分析探讨,找出影响造粒机正常运行的不利因素,并采取相应的解决办法,从而延长造粒机的运行周期。 相似文献
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Philipp Grohn Luca Schaedler Aitor Atxutegi Prof. Stefan Heinrich Prof. Sergiy Antonyuk 《化学,工程师,技术》2023,95(1-2):244-255
The fluidization behavior of cylindrical particles in a spouted bed was first investigated experimentally using a camera setup. The obtained average spouted bed height was used to evaluate the accuracy of different drag models in CFD-DEM simulations with the superquadric approach to model the particle shape. The drag model according to Sanjeevi et al. showed the best agreement. With this model, cylindrical particles were simulated in a rotor granulator and the particle dynamics were compared with the fluidization of volume equivalent spherical particles. 相似文献
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Drying of Slurries in Fluidized Bed of Inert Particles 总被引:2,自引:0,他引:2
Zeljko B. Grbavcic Zorana Lj Arsenijevic Radmila V. Garic-Grulovic 《Drying Technology》2004,22(8):1793-1812
A fluid bed dryer with inert particles was used for drying of slurries. Experiments were performed in a cylindrical column 215 mm in diameter and 1200 mm in height with glass spheres as inert particles. Slurries of Zineb fungicide, copper hydroxide, calcium carbonate, and pure water were used as the feed material. The effects of operating conditions on dryer throughput and product quality were investigated. Main performance criteria, i.e., specific water evaporation rate, specific heat consumption, and specific air consumption, were quantified. Temperature profile along the bed was mapped, and nearly isothermal conditions were found due to thorough mixing of the particles. The material hold-up and residence time were determined. Simple heat and mass balances predict the dryer performance quite well. 相似文献
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In this study, a three-dimensional model based on RANS, slender-body theory and Newton-Euler dynamics is established to study the number concentration, one of the most important fluidization characteristics of cylindrical particles. Also, the effects of interaction between cylindrical particles are taken into account by introducing the rigid collision dynamics. To validate the model, the fluidization experiments of cylindrical particles in a cold-state fluidized bed are carried out. The number concentration characteristics of cylindrical particles are obtained from computational fluid dynamics (CFD) simulation. It is found that cylindrical particles arriving at the exit of the riser the earliest come from the near-wall regions, the horizontal transfer of so many cylindrical particles from the radial centre regions to the near-wall regions is evident. Meanwhile, there is no distinct relationship between the number concentration and inlet wind velocity. 相似文献