共查询到20条相似文献,搜索用时 46 毫秒
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为降低生产能耗和便于生产操作,采用规整填料塔对某咖啡因生产企业萃取工序进行设备改造,其中氯仿为连续相。中试试验中,在相同工况条件下,对往复筛板萃取塔和规整填料塔的处理能力进行了比较,系统地考察了填料萃取塔(塔径600 mm,填料实际有效高度7 m)对不同质量分数、不同类型的咖啡因母液的处理能力和最佳流比。中试结果表明,规整填料萃取塔的处理能力比往复筛板萃取塔大,萃取塔在S/F为0.8,甲化母液最大处理量为5 m3/h,咖啡因的萃取率为99.8%,残液中咖啡因质量分数和氯仿残留满足工业生产的要求。 相似文献
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QH—1新型填料萃取塔轴向混合和传质性能研究 总被引:9,自引:0,他引:9
针对润滑油精制等实际应用的特点,选用低界面张力的正丁醇-丁二酸-水体系,在φ100mm的填料萃取柱中对国外引进的两种新型填料和我校新开发的QH-1型填料的萃取性能进行了比较。结果表明,QH-1型填料的传质效率最高,轴向返混最小。 相似文献
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引 言气体搅动是一种外加能量的萃取方法 .与机械搅拌相比 ,气体搅动的萃取塔内无运动部件 ,操作稳定 ,结构简单 ,能耗低 .过去已有数篇关于气体搅动的混合 -澄清槽[1] 、喷洒塔[2~ 4 ] 、多级连续萃取器[5] 等无填料的萃取过程水力学性能和传质性能的文献报道 .而在填料塔萃取过程中加入气体搅动技术 ,一方面继承了填料可以有效地降低轴向返混的优越性能 ;另一方面 ,通过外加能量进一步强化液 -液两相接触与传质 ,提高传质系数 ,综合了外加能量的萃取技术和填料萃取技术的优点 .关于这方面的内容目前少有报道[6] .1 实验装置与实验方法… 相似文献
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采用30%TBP(煤油)/HAc/水体系研究了脉冲填料萃取塔的流体动力学和传质特性,考察了脉冲强度和填普类型对塔性能的影响。实验表明装填QH-1型扁环的脉冲填料 性能明显优于装填陶瓷和不锈钢拉西环的脉冲塔。文中给出了装填QH-1型扁环的脉冲填普塔的特性速度和Hoxp的经验计算式。 相似文献
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国产BG-10型压延孔板波纹填料性能研究 总被引:2,自引:1,他引:2
用冷、热模实验研究了BG-10型压延孔板波纹填料的流体力学和传质性能.得出 了计算其压降和泛点的关联式。并与孔板波纹填料(250y)进行了对比,发现该填料 的性能优于250Y孔板波纹填料。 相似文献
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描述了新型萃取设备—湍流旋液萃取器的原理和结构。应用磷酸三丁酯-煤油-ZnCl_2水溶液这一萃取体系对该设备的萃取性能进行了实验测定,并与传统的混合澄清槽作了比较,结果表明该萃取设备具有处理量大,萃取效率高以及分相能力强的优点,适于工业化生产应用。 相似文献
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简述波纹填料的发展历程,强调复网借助毛细力提高分离效率的重要意义,提出“液体多向扩散”的理论观点,介绍金属复合板网波纹填料的研究进展。 相似文献
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两种新型填料的性能测试与评价 总被引:4,自引:1,他引:4
介绍目前两种新型填料环矩鞍及共轭环。在φ300mm的试验塔中测定了它们的流体力学性能数据和传质数据,对实验结果对比分析表明;环矩鞍的流体力学性能优于共轭环,但共轭环的传质性能优于环矩鞍。 相似文献
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PERFORMANCE OF MELLAPAK 350Y CORRUGATED SHEET STRUCTURED PACKING AT ELEVATED PRESSURE 总被引:1,自引:1,他引:0
Since the 1970s, corrugated metal sheet structured packing has been widely used in chemical and petrochemical industry for their high throughput, low pressure drop, lower liquid holdup, good separation efficiency and, particularly, smaller scaleup effect in comparison with random packing. 相似文献
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A generalized dynamic mode! of a distributed staged (packed) fractionator is developed in this work. In particular we consider the dynamics of fractionators which employ structured packings as a means of achieving mass and heat transfer in multi-component systems.
The mathematical model is described by a large set of partial and ordinary differential equations coupled with non-linear algebraic constraints (PODAEs). These equations arise from the mass and energy balances on a distributed column-section together with the fluid dynamic relations. A computational algorithm is developed which employs a polynomial approximation leading to a large differential-algebraic equation (DAE) system. This is solved using standard implicit DAE algorithms.
In this work, the liquid holdup and transfer coefficients (both mass and heat) are computed from established correlations and detailed thermodynamic relations. This differs from most of the previous work reported, which used very simple correlations based on a single variable such as liquid or vapour rate. The results show that the more rigorous computation of transfer coefficients is essential to the veracity of the model.
The model has been applied to the case of an industrial depropanizer which uses a Mellapak 250Y structured packing. The generalized model can be used to study the control and optimization of such fractionators, which are becoming more prolific in the petroleum and related industries. 相似文献
The mathematical model is described by a large set of partial and ordinary differential equations coupled with non-linear algebraic constraints (PODAEs). These equations arise from the mass and energy balances on a distributed column-section together with the fluid dynamic relations. A computational algorithm is developed which employs a polynomial approximation leading to a large differential-algebraic equation (DAE) system. This is solved using standard implicit DAE algorithms.
In this work, the liquid holdup and transfer coefficients (both mass and heat) are computed from established correlations and detailed thermodynamic relations. This differs from most of the previous work reported, which used very simple correlations based on a single variable such as liquid or vapour rate. The results show that the more rigorous computation of transfer coefficients is essential to the veracity of the model.
The model has been applied to the case of an industrial depropanizer which uses a Mellapak 250Y structured packing. The generalized model can be used to study the control and optimization of such fractionators, which are becoming more prolific in the petroleum and related industries. 相似文献
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网填筛板流体力学性能研究 总被引:2,自引:0,他引:2
在直径为600mm有机玻璃塔内,以水-空气系统对放置网孔填料层的筛板(称网填筛板)和普通筛板进行了流体力学性能对比实验。研究发现,在普通筛板上加一层厚度为15mm的网孔填料,可以使雾沫夹带明显减少,负荷上限提高50%~80%。同时,塔板压降和漏液有所增加。 相似文献
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槽盘式气液分布器的研究及其在大型塔中的应用 总被引:8,自引:0,他引:8
本文介绍了一种新型气液分布器——槽盘式气液分布器的结构及性能特点、操作弹性、夹带因子及用于指导工程设计的夹带曲线。最后列举了槽盘式气液分布器在大型减压塔中的设计实例和应用效果,展示了其应用前景。 相似文献