颗粒形貌对油菜秸秆干燥过程的影响

为了考察在流化干燥中颗粒形貌对油菜秸秆干燥过程的影响,利用干燥箱在不同干燥温度下对圆柱形和半圆柱形油菜秸秆进行了等温干燥实验。结果表明,油菜秸秆干燥过程具有典型的干燥升温、等速、降速三个阶段,秸秆的纵截面比横截面更有利于吸着水的干燥。较好的干燥工艺条件为：干燥温度70℃．圆柱油菜秸秆的横截面积与自然面积比0．65;劈半油菜秸秆的纵截面积与横截面积比为2．5。通过Page方程的数据拟合。分别得出圆柱形和半圆柱形油菜秸秆在较好工艺条件下的干燥模型。     

乙炔气变压吸附深度干燥工艺研究与实践

介绍了乙炔气（C2H2）变压吸附干燥机理,考察了专用干燥剂吸附量与吸附力对C2H2原料气干燥效果的影响,提出了干燥单元内干燥剂组合填装使用方案,优化了C2H2变压吸附5塔（5-2-1）干燥工艺流程与操作条件,工程化实践取得较好的效果。     

热风干燥条件对干燥特性影响及数学模型研究

为了有效提高恒速干燥阶段的干燥速率,对干燥过程的温度、风压等干燥变量进行了研究与分析,通过实验研究干燥变量对干燥过程中干燥物料的影响,选取8种干燥数学模型进行拟合分析,并建立验证最优干燥过程数学模型。结果表明:干燥速率随温度升高而增大,干燥时间随温度升高而减小。有效水分扩散系数3.5498×10^-10m²/s-6.8461×10^-10m²/s,平均活化能21.67k J/mol。Wang函数模型能较好的描述工业呢(帆布)热风干燥过程(R²:0.9983～0.9998,RMSE:0.0008～0.0064,χ²:0.0001～0.0004),对实验过程的拟合度较优。     

香蕉皮的干燥及对罗丹明B的吸附

以香蕉皮为原料,考察3种干燥法(自然干燥、烘箱干燥和微波干燥)对制备香蕉皮粉的影响,并测定其对罗丹明B的吸附性能. 结果表明,采用微波干燥法,在功率800 W的条件下仅需4 min即成功制备出高脱水率(90%)、易研磨且外观和结构保持较好的香蕉皮粉;香蕉皮粉对罗丹明B具有良好的吸附性能,其吸附量(>110 mg/g)高于多数其他生物吸附剂的吸附量;香蕉皮粉结构中羧基和羟基等官能团促进了罗丹明B的吸附.     

不同干燥方法对北沙参中5种香豆素及多糖含量的影响分析

目的:考察不同的干燥方法对北沙参中的化学成分香豆素类及多糖含量的影响,以期为确定北沙参产地适宜的干燥方法提供理论依据.方法:采用晒干、阴干、热风烘干(70 ℃、60 ℃、50 ℃、40℃)及微波等不同的干燥方法对北沙参进行干燥;运用HPLC法测定北沙参中补骨脂素、花椒毒素、佛手柑内酯、欧前胡素和异欧前胡素的含量;运用苯...     

干燥工艺条件对氨基模塑料性能的影响

简要介绍了氨基模塑料的生产工艺过程及生产中主要的工艺参数,研究了干燥工艺条件对氨基模塑料性能的影响.结果表明,干燥温度为90℃,干燥时间为2.5 h,物料层厚度为25 mm,空气排出量为30 m3/h时,所得到的氨基模塑料的固化时间为45 s,流动性为145 mm,符合厂家的使用要求.     

工艺条件对冲液电铸微结构粗糙度及形貌的影响

采用冲液电铸工艺制备金属微结构,研究了阴极电流密度和冲液速率对微结构粗糙度及形貌的影响。结果表明:粗糙度随阴极电流密度的增加(0.5～1.3A/dm2)而增大,但随冲液速率的提高(0.2～1.3m/s)而减小;阴极电流密度和冲液速率均对微结构的形貌有明显影响,当阴极电流密度为0.5A/dm2且冲液速率为1.3m/s时,微结构的形貌质量最优。     

干燥条件对螺旋藻产品质量的影响

应用化学分析方法,初步考察了干燥温度及干燥时间对钝顶螺旋藻体内主要活性成份粗蛋白、叶绿素、b -胡萝卜素的影响,确定了实验室条件下螺旋藻干燥的适宜条件,为进一步确定利用流化床干燥螺旋藻的工艺条件及设备的设计提供了实验依据.     

不同形貌镁铝水滑石的可控合成及 其对氯离子的吸附性能研究

以硝酸镁、硝酸铝为原料,尿素为沉淀剂,采用水热法在不同条件下合成了不同形貌的镁铝水滑石,通过SEM、XRD和BET等手段对合成的样品进行表征;研究了不同形貌水滑石及其焙烧产物对溶液中氯离子的吸附性能。结果表明:采用水热法添加乙二醇可合成棒状镁铝水滑石,添加乙醇可合成片状六边形镁铝水滑石,添加四丙基氢氧化铵可合成立方体镁铝水滑石。其中,添加乙醇制备的片状六边形纳米水滑石形貌规整均一,片间形成交叉支撑结构,比表面积为115.311 m2/g,对氯离子有较好的吸附性能,在室温条件下最大吸附容量为24.72 mg/g。经450 ℃焙烧后,焙烧产物吸附氯离子的能力大大增强,相同条件下最大吸附容量为96.07 mg/g,最优吸附条件：温度为35 ℃,投加量为2.0 g/L,pH值为8。     

湿氯气在丝光沸石上吸附干燥的特性

本文研完了经处理后的丝光沸石对湿氯气吸附干燥的特性。测定了水与氯气双组份的吸附等温线和分离系数;考察了气速、温度等因素对动态吸附及脱附过程的影响,并初步考察了该吸附剂的稳定性。结果表明,该吸附剂可用于湿氯气的深度干燥。     

传统、冷冻、微波干燥条件制备海藻酸钠/火山灰复合微球及除磷效率研究

探讨了传统、冷冻、微波干燥条件制备海藻酸钠/火山灰复合微球以及作为吸附剂时,对水体中磷酸根的吸附行为。结果表明:三种干燥条件下制备的复合微球除磷行为基本相同,其总磷去除效率均大于90%。其中,微波干燥过程操作简便快速,相应条件下制备得到的海藻酸钠/火山灰复合微球在吸附除磷方面具有实用价值。     

微波真空干燥固体蜂蜜的等温吸湿规律的研究

应用静态称重技术测定了固体蜂蜜的吸附平衡含水率，获得了相应的吸附等温线，对其吸附规律进行了探讨，并根据目前在食品吸湿规律研究中常用的六种模型对不同温度条件下固体蜂蜜的吸湿试验进行了模拟比较，得出GAB模型为固体蜂蜜适用的吸湿模型，并确定了模型系数。     

Comparative Study of Effects of Drying Methods and Storage Conditions on Aroma and Quality Attributes of Thai Jasmine Rice

This article describes the effects of various drying treatments and storage conditions on the main quality attributes of Thai jasmine rice; i.e., aroma, milling, pasting, and cooking properties. The experimental results show that drying treatments using various high temperatures (115–150°C) combined with 30 min tempering time between the pass or ambient air drying affect the composition of volatile compounds as well as the commercially accepted quality characteristics of Thai fragrant rice. High-temperature drying followed by ambient air drying can retain most of the quality attributes of Thai jasmine rice than multi-pass high-temperature drying with a tempering period between passes.     

Comparative Study of Effects of Drying Methods and Storage Conditions on Aroma and Quality Attributes of Thai Jasmine Rice

This article describes the effects of various drying treatments and storage conditions on the main quality attributes of Thai jasmine rice; i.e., aroma, milling, pasting, and cooking properties. The experimental results show that drying treatments using various high temperatures (115-150°C) combined with 30 min tempering time between the pass or ambient air drying affect the composition of volatile compounds as well as the commercially accepted quality characteristics of Thai fragrant rice. High-temperature drying followed by ambient air drying can retain most of the quality attributes of Thai jasmine rice than multi-pass high-temperature drying with a tempering period between passes.     

Effect of Drying Method on Gas Adsorption Characteristics of Carbon Gel Microspheres

Abstract

The effect of drying method used in the preparation of carbon gel microspheres was studied by comparing the porous properties of carbon cryogel microspheres (CCM) and carbon xerogel microspheres (CXM), which were respectively obtained using freeze drying and hot air drying. CCM were found to possess higher mesoporosity than CXM because freeze drying was effective to suppress the shrinkage of the mesopores during drying. On the other hand, the microporosity of the carbon gel microspheres was hardly influenced by not only the drying method but also the synthesis condition. Although the amounts of nitrogen and oxygen adsorbed were almost the same, the adsorption rate of nitrogen on both CCM and CXM possessing ultramicroporous surfaces was much larger than that of oxygen, which indicated the applicability of the carbon gel microspheres to adsorbents for pressure swing adsorption (PSA) of air. The relations between the temperature and the amount of oxygen adsorbed showed the adsorption characteristics of CCM and CXM as adsorbents for temperature swing adsorption (TSA) were almost the same.     

Effects of Operating Conditions on the Combined Convective-Microwave Drying of Agar Gels

Combined convective-microwave drying enables a considerable reduction in drying time compared to convective drying, the time required for the process being inversely proportional to the microwave power applied. This work presents the convective-microwave drying experiments carried out using agar gel plates conducive to studying the influence on drying kinetics of parameters such as the microwave power applied, sample thickness, and air conditions (humidity, temperature, airflow).     

Effects of Operating Conditions on the Combined Convective-Microwave Drying of Agar Gels

Combined convective-microwave drying enables a considerable reduction in drying time compared to convective drying, the time required for the process being inversely proportional to the microwave power applied. This work presents the convective-microwave drying experiments carried out using agar gel plates conducive to studying the influence on drying kinetics of parameters such as the microwave power applied, sample thickness, and air conditions (humidity, temperature, airflow).     

Influence of Drying Conditions on the Structure of Flaxseed Gum

The effect of drying conditions of flaxseed gum on its viscoelastic properties is discussed in the article. A possibility of assessing the structure of dried gum by using a rheological, fractional standard linear solid model was indicated. Rheological parameters of this model were determined for different drying conditions, and differences in the structure of flaxseed gum were shown. Additionally, the effect of flaxseed gum drying conditions on linear dimensions of its structures is discussed in the article.