热空气-微波耦合天然橡胶干燥机设计及其干燥动力学研究  

The Design of Hot Air and Microwave Coupled Dryer for Natural Rubber and its Dynamic Model

作　　者：高宏华[1] 张新儒[2] 王永洪[2] 刘成岑[2] 王俊文[2] 校现周[1] 罗世巧[1] GAO Honghua ZHANG Xinru WANG Yonghong LIU Chengcen WANG Junwen XIAO Xianzhou LUO Shiqiao(Rubber Research Institute, CATAS/Ministry of Agriculture Key Labaratoryfor Biology and Genetic Resources of Rubber Tree/ State Key Laboratory Breeding Base for Cultivation ＆ Physiology for Tropical Crops, Danzhou, Hainan 571737, China College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]中国热带农业科学院橡胶研究所,农业部橡胶树生物学与遗传资源利用重点实验室、省部共建国家重点实验室培育基地-海南省热带作物栽培生理学重点实验室及农业部儋州热带作物科学观测实验站,海南儋州571737 [2]太原理工大学化学化工学院,山西太原030024

出　　处：《热带作物学报》2016年第12期2415-2419,共5页Chinese Journal of Tropical Crops

基　　金：农业部橡胶树生物学与遗传资源利用重点实验室开放基金(No.RRI-KLOF201606);中国热带农业科学院橡胶研究所基本科研业务费专项(No.1630022015008)

摘　　要：为了解决天然橡胶加工中存在的干燥时间长、能耗高、环境污染和设备占地较大等问题,设计了一种热空气-微波耦合天然橡胶干燥机,以实现两种干燥方式优势互补,提升天然橡胶加工干燥技术水平。以胶乳级颗粒胶为研究对象,采用该设备研究了微波干燥和热空气-微波耦合干燥特性,及耦合干燥动力学。研究发现:当天然橡胶初始含水率高时,采用微波干燥容易使橡胶受热不均匀,从而发生内部局部过热,使胶粒发粘变坏,影响天然橡胶的性能;而采用热空气-微波耦合干燥,橡胶的干燥时间由单独用热空气干燥的415.8 min降至耦合干燥的107 min,且干燥过程传热比较均匀,得到的橡胶品质较好。根据天然橡胶的水分变化规律,建立了天然橡胶热空气-微波干燥动力学模型,其动力学模型为:MR=(1-a)exp(-0.0485t^(0.685))+(1-b)exp(-4.76×10^(-76)t^(35.905))。The hot air and microwave coupled dryer for natural rubber was designed to solve the problem existed in natural rubber processing for example long drying time, high energy consumption, environmental pollution, and Larger equipment, etc. This machine can realize complementary advantages of two kinds of drying method. The latex standard China rubber（LSCR）was regarded as objection to investigate the drying characteristics of microwave and coupled drying, and coupled drying dynamic model. The results showed that the natural rubber became sticky and deteriorated, which influenced the quality of LSCR. Because water in rubber particle was over-hot and nonuniform heat transport, when the initial water content was high. However, the coupled drying was adopted to LSCR, whose drying time was reduced from 415.8 min in case of hot air drying to 107 min, and the heat transport was uniform. Thus, the quality of LSCR was good. The dynamic model of the hot air and microwave coupled drying was constructed according to moisture variation law, and the dynamic model is MR=（1-a）exp（-0.0485t^0.685）＋（1-b）exp（-4.76×10^-76t^35.905）.

关 键 词：热空气-微波干燥 天然橡胶 耦合干燥机 干燥特性 干燥动力学模型 

分 类 号：TK173[动力工程及工程热物理—热能工程]