轮胎工业炼胶工序的节能减排

对轮胎工业炼胶工序进行分析,采取措施降低能耗、减少环境污染.通过改变现有炭黑、填料输送、称量与投料方式,采用包装袋直接投料方法,可减少粉尘污染,达到清洁生产的目的;采用智能控制系统、强化下辅机的补充混炼与分散作用,优化混炼工艺、减少胶料混炼段数、提高大型密炼机生产效率等措施,可大幅度降低能耗,并可以简化厂房设计、降低建筑成本,减少设备投资及设备维修费用,降低生产成本,而且有利于工人身体健康.     

低温一次法炼胶工艺的研究开发和应用进展

简述国外新型连续混炼工艺,重点总结和介绍国内低温一次法炼胶工艺的研究开发和应用进展。低温一次法炼胶工艺是将传统的多段混炼改为一次混炼,即胶料通过密炼机高温密炼后,先经过第一台开炼机进行冷却,然后通过中央输送系统对称地分配到周围多台开炼机进行连续低温混炼,直接得到终炼胶,整个过程强化了下辅机的混炼作用,且全过程实现自动化控制,取消了胶料中间传递和反复升降温过程,从而大幅度减少占用场地,降低能耗,缩短混炼时间。橡胶混炼技术未来的发展方向是利用物联网设计理念和可视化监控方式、高度集成成套智能装备的智能化炼胶车间总体设计。     

强化密炼机下辅机混炼的理论基础和工艺技术实践思考

一、密炼机下辅机的发展进程F.H Banbury发明本伯里密炼机至今,密炼机混炼已逐步成为现代混炼工艺中最主要而普通的方式。随着密炼机的进步,密炼机从最初的低速混炼发展到现在的中高速混炼,并且容量也不断增大,混炼技术从过去的一段混炼法发展到目前的多段混炼法,密炼机的混炼效率得到了很大的提     

为开发高性能密炼机而进行的高分子材料模拟混炼

橡胶胶料的用途正日益扩大,因此必然要求能对至今尚不能混和的材料进行混炼加工,且要求混炼胶的质量或产量较高。为了满足这些要求和设计出高性能密炼机,必需阐明可将密炼机形状和混炼条件与混炼特性(特别是混炼质量)联系起来的混炼参数。密炼机主要对胶料提供剪切混和作用和分布混和作用。剪切混和作用影响胶料在垂直于转子轴线方向上的运动,它在很大程度上取决于转子的断面形状。分布混和作用影响的是胶料在密炼机内的宏观运动,在     

轮胎分会在长沙召开研讨会

2011年6月29日,中国橡胶工业协会轮胎分会在长沙召开强化密炼机下辅机混炼技术研讨会,来自全国各轮胎、橡胶企业的70多名专家     

GK270N与GN300型密炼机的结构及性能比较

对GK270N和GN300两种型号密炼机的主要技术参数、结构特点和性能进行比较。GK270N型密炼机属于轻型密炼机,转子强度较低,比较适合斜交轮胎胶料生产;GN300型重型密炼机适用于各种胶料的塑炼、混炼和终炼,特别适用于子午线轮胎胶料的混炼和终炼。建议使用厂家根据实际需要选择更适用于本企业的设备,也可以根据现有的设备状况进行适当改造,使现有设备的功能得到充分发挥。     

密炼机中橡胶混炼的流变理论及应用

介绍了密炼机中橡胶混炼的流变理论,即混炼的主要阶段胶料呈粘弹性流体,胶料的混炼工艺主要由胶料粘度决定,胶料达到最佳粘度时,混炼工艺最优。密炼机功率曲线反映了密炼室中胶料的混炼状态,通过功率曲线可以分析判断胶料的混炼工艺情况,根据密炼机中橡胶混炼的流变理论,开发了MLJ－300型密炼机微机智能控制系统,该系统可以对混炼工艺进行自动或半自动优化,根据胶料配方和 炼机性能可建立混炼 炼机性能可建立混炼胶质量预测数学模型,包括粘度和分散性预测数学模型,采用预测数学模型控制生产,可保证每批混炼胶质量达到要求,实现密炼机的高效优质生产。     

密炼机下辅机采用双螺杆挤出压片机与开炼机的对比分析

一直以来,行业内普遍认为,双螺杆挤出压片机作为密炼机下辅机使用对胶料的混炼效果影响几乎可以忽略不计,另外考虑到突发故障停机排胶困难等缺陷。目前行业内,轮胎终炼胶生产线下辅机多为双开炼机配置。但是,这种双开炼机配置会出现终炼胶硫变波动大、胶料混炼不均等情况,直接影响到了我司的产品质量,经过我司认真研究分析,并通过实际改造论证,证实下辅机采用双螺杆挤出压片机在提升终炼胶硫磺分散效果方面相对于采用开炼机有着明显优势。     

250／40密炼机混炼室室壁温度调节方法

通过对密炼机和混炼过程的研究证明,如果密炼机混炼室内表面的温度下超过每种具体胶料的最适宜的炼胶温度,并且不管炼胶车数的多少,每一个胶料开始混炼的时候,混炼室室壁的温度都能保持稳定,那么这种混炼条件堪称最佳混炼条件。当混炼室工作表面温度比较低时,胶料会沿工作表面打     

HF串联密炼机炼胶工艺技术研究

串联密炼机在能源消耗与胶料性能改善方面有突出优点,它采用啮合型转子结构对胶料进行剪切混炼,混炼效果好,冷却效果良好,适合白炭黑混炼的热履历炼胶控制、转子转数控制等。本文对HF串联密烁机的产量、胶料的性能和动态粘弹性能进行了实验研究,并与普通密炼机进行了对比,结果表明：HF串联密炼机炭黑宏观分散度高,微观分散效果也比一般密炼机好,混炼的胶料扯断强度和扯断伸长率高,胶料在60℃时的动态滞后损失要低于F370混炼的胶料,因此,HF串联密炼机适合绿色环保轮胎高混炼的要求。     

喷射式液液混和器与静态混和器复合的工程应用研究

喷射式液液混和器和静态混和器都是混和过程强化的重要设备。合理设计具有喷射式混和器、静态混和器的复合结构的新混和器能直接混和两种不同压力的流体,使压力较低流体混和后的压力有所提高,保证较好的混和效果。通过对工程实例的应用研究证明新的混和器能降低能耗,简化流程,提高经济效益。     

喷射式液液混合器与静态混合器复合应用研究

喷射式液液混合器和静态混合器都是混合过程强化的重要设备。合理设计具有喷射式混合器、静态混合器的复合结构的新混合器,可以解决生产上的难题。新混合器能直接进行两种不同压力流体的混合,使压力较低流体混合后的压力有所提高,保证较好的混合效果,降低能耗,提高经济效益,简化流程。降低投资。     

Accessing multidimensional mixing via 3D printing and showerhead micromixer design

We present a 3D metal printing showerhead mixer to blend effectively two reagent streams into a confined mixing volume. Each stream is predistributed to multiple channels to increase the contact area in the mixing zone, which enables high mixing performance with smaller pressure drop. The showerhead mixer shows excellent mixing performance owing to its ability to intersperse rapidly the two streams as characterized by the diazo coupling reactions and computational fluid dynamics (CFD) simulations. Experimental results demonstrate superior performance of the showerhead mixer compared to two common commercial micro T-mixers, especially in low Reynolds number regime. CFD results are employed to (a) help understand the mixing mechanism, (b) reproduce the experimental observations, and (c) inform the design specifications for optimal performance. Good agreement between experiments and simulations is achieved. The final design includes multiple side-fed inlets for improved mixing performance of the showerhead mixer, as suggested by the validated CFD models.     

Plant Fiber Processing Using the Controlled Deformation Dynamic Mixer

The reduced energy consumption required by the controlled deformation dynamic mixer (CDDM) to process plant fibers is highlighted. Trials have been performed using current industrial mixers, and the products created were compared to those produced using the CDDM technology. Increasing pressure leads to a product of higher viscosity, which is more desirable as the fibers have greater structure development and take up more water. This is also observed with the comparison to current mixing technologies, but the energy consumption and pressure required to obtain products of equal viscosities is less when using CDDM technology.     

Mixing strategy effect on dispersion of amine during reagent production for flotation applications

Mixing and dispersion strategies for the inline production of amine flotation reagents is explored for 2.54 cm and 5.08 cm process lines and flow rates comparable to current commercial production systems. Through video analysis of injection into a clear pipe, the dispersion effectiveness was visualized and quantified as a variability intensity, and compared for natural‐stream turbulence, orifice‐plate and structured static mixing elements. The results suggest that a single point of energy dissipation was more effective in dispersing the injected amine, with the orifice plates consistently yielding fully‐dispersed reagent solutions. The results suggest that while a structured mixing device with 6 elements did improve dispersion relative to an empty pipe, more mixing elements or a smaller characteristic length (i.e. 2.54 cm mixer) would be better suited to this specific application.     

采用新型变间隙转子混炼短纤维/橡胶复合材料

分析短纤维/橡胶复合材料的混炼机理,针对短纤维胶料混炼特点设计新型变间隙六棱同步转子。转子棱峰与密炼室内壁间隙影响短纤维在胶料中的混合和分散以及混炼胶中短纤维的长度。新型六棱同步转子采用变间隙设计,大间隙有助于短纤维的混合,小间隙有助于短纤维的分散。采用新型六棱同步转子可改善短纤维/橡胶复合材料的混炼质量和性能,并能够提高生产效率。     

Effects of geometry and operating conditions on the mixing behavior of an in-line impinging stream mixer

The present study investigated experimentally the effects of various geometric and operating parameters on the mixing characteristics of model liquids undergoing mixing in a novel in-line mixer, viz. an in-line impinging stream (IS) mixer. First, the mixer with one set of three inlet jets was used. Later two sets of inlet jets were used in order to increase the number of impingement zones and hence the mixing capability of the mixer. A statistical analysis was performed to indicate the best geometry of the mixer based on the data of both the mixing effectiveness and the pressure loss due to impingement of liquid streams.     

国外橡胶机械发展概况

简介了目前国际上主要橡机生产企业的概况。对炼胶设备（包括开炼机、密炼机、连续混炼设备）、橡胶挤出机、压延机、轮胎成型设备、硫化设备等主要橡机生产设备的技术现状和主要生产厂家作了分析和介绍。最后介绍了液压马达、激光等新技术在橡机方面的应用情况。     

焦炉新型煤气掺混器的开发与应用

针对以往煤气混合器的优缺点，设计开发了新型煤气混合器。新型煤气混合器具有掺混均匀、不易堵塞、操作方便安全等优点，对降低能源消耗和生产成本有积极的作用。该掺混装置应用于多个焦炉项目中，运行状态良好。     

Characterization of continuous convective powder mixing processes

The Process Analytical Technology (PAT) initiative has encouraged the development of new technology to improve upon the current manufacturing paradigm. As a result substantial attention has recently focused on continuous processing due to the ability to control disturbances online, avoiding the loss of processing materials and enabling effective process scale-up. In this paper, a pharmaceutical formulation is blended using a continuous flow “high shear” mixer utilizing different operating and design parameters. The mixing efficiency is characterized by extracting samples at the discharge of the blender, and analyzing them using Near Infrared Spectroscopy to determine compositional distribution. Operational conditions such as the inclination angle of the mixer and impeller rotation rate were investigated and showed to affect the mean residence time. The effects of mixer angle, agitation speed, number of blades, blade angle, number of passes through the mixer on the mixing performance of a powder continuous convective mixer are also examined and shown to affect mixing performance whereas the cohesive properties of the material did not significantly affect the mixing operation.