气力输送过程中炭黑粒子破碎率影响因素分析  

Analysis of Factors Affecting Carbon Black Particle Breakage Rate in Pneumatic Conveying Process

作　　者：李勇[1] 刘伟冬[1] 董放 郭喜龙 LI Yong;LIU Weidong;DONG Fang;GUO Xilong(Qingdao University of Science and Technology, Qingdao 266061, China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《橡胶工业》2018年第6期699-703,共5页China Rubber Industry

摘　　要：分析气力输送过程中炭黑粒子破碎率的影响因素。炭黑品种及造粒方式、炭黑粒子压碎强度、输送距离、输送气速、输送方式、输送管道清扫对炭黑粒子破碎率的影响较大。综合考虑各方面因素,对气力输送系统优化提出建议:湿法造粒炭黑粒子破碎率明显小于干法造粒炭黑,应按造粒方式分别设定炭黑粒子破碎率指标,炭黑造粒应优选湿法造粒工艺;为了保证输送后炭黑粒子破碎率小于10%,炭黑粒子压碎强度应大于30 g,同时炭黑粒子压碎强度分布不宜过宽;在气力输送系统中采用比例调速阀,通过自动控制系统自动调节炭黑输送气速,以实现不同炭黑在最佳状态下输送;尽量减小管道清扫次数。Factors affecting particle breakage rate of carbon black in pneumatic conveying process were analyzed. It was found that carbon black varieties and granulation methods,individual pellet crush strength of carbon black,conveying distance,air velocity,conveying mode and pipeline cleaning had great influence on the particles breakage rate of carbon black. Then,the pneumatic conveying system was optimized. The particle breakage rate of wet granulated carbon black was much lower than that of dry granulated carbon black. Therefore,the particle breakage rate of carbon black should be set separately according to the granulation method respectively,and the wet granulation process was preferred for carbon black granulation. In order to ensure the particle breakage rate of carbon black less than 10% after transportation,the individual pellet crush strength of carbon black should be higher than 30 g,and the distribution of individual pellet crush strength of carbon black should not be too wide. The proportional speed control valve were used in pneumatic conveying system,and the air velocity conveying carbon black could be automatically adjusted in automatic control system,so that different carbon blacks could be transported in the best condition. The pipeline cleaning frequency should be reduced as much as possible.

关 键 词：炭黑 气力输送 破碎率 压碎强度 

分 类 号：TQ330.381[化学工程—橡胶工业] TQ330.43