平板式过滤洗涤干燥多功能机及其耐腐蚀结构的研究和开发

介绍了平板式过滤洗涤干燥多功能机的主要结构、工作原理和优点.还介绍了针对硫酸、盐酸、氢氟酸、王水、氯离子等腐蚀性介质该机所进行的耐腐蚀结构设计和研究开发,特别是介绍了针对不同物料如何选用多功能机的耐腐蚀结构.     

过滤洗涤干燥多功能设备的开发与应用

介绍了多功能设备的基本结构、功能及操作情况。阐述了使用时的显著优势。     

过滤洗涤干燥机（三合一）的原理及要求

随着医药装备制造业的发展,避免制药过程中原料药物的污染,符合FDA和药品GMP的要求,首先用于生产的设备就要满足要求,所以选用合适的设备尤其重要。但许多厂家在设备选型时对功能需求模糊,出现设备功能不足或过剩等现象。从三合一设备功能的工作原理出发,对设备的性能、设计、结构型式、功能等进行详细阐述,并对设备安装及系统配置要求进行了相应论述。     

新型过滤、洗涤、干燥“三合一”设备的开发

开发了一种新型"三合一"设备,该设备集过滤、洗涤和干燥功能于一体,其特殊的磁力传动密封结构,最大限度地保证了过滤过程的密封性;洗涤过程中,可进行化浆洗涤和置换洗涤,洗涤效果好;干燥过程中,有效换热面积大,搅拌强度可调,且可在真空条件下进行操作,干燥效率高、操作周期短,特别适合应用于医药、精细化工及有机化工等行业中涉及有毒、有害、易燃、易挥物质的分离过程。     

浅谈过滤洗涤干燥机的应用

介绍了过滤洗涤干燥机的结构和特点,论述了该机过滤、洗涤、干燥和灭菌工艺的原理,并分析了该机的优缺点。     

纳米材料的过滤和洗涤

过滤和洗涤是粉末产品生产中常见的化工单元操作，也是纳米材料液相合成法需要研究的工程问题。对于以纳米材料制各为目标的单元操作，过滤和洗涤的目的是高效率地得到纯净的滤饼。从工程上考虑，这些单元操作一方面要解决过程的可行性，另一方面要考虑过程的经济性。     

关于冷却塔洗涤塔衬里结构的商榷

在大型硫酸厂的冷却塔、洗涤塔中，我国常用的复合防腐衬里是在衬铅与钢．壳之间加设石棉板保护层。通过对铅板与钢壳的受力状况的分析，说明钢壳不开孔的原因。     

脱硅粉煤灰浆液过滤介质选择与滤饼洗涤研究

针对高铝粉煤灰预脱硅-碱石灰烧结法工艺,脱硅粉煤灰浆液的过滤与洗涤是影响过滤效果和生产能力的关键点,为此通过实验研究了不同过滤性能的滤布对过滤效果的影响,筛选出了适宜的滤布。针对滤饼洗涤,研究了洗涤次数与洗涤方式对滤饼洗涤效果的影响,为脱硅粉煤灰浆液的过滤与洗涤的工业应用提供了依据。     

木糖醇悬浮液过滤与干燥特性的实验研究

由工艺实验得出了木糖醇悬浮液的过滤方程和干燥曲线 ,并对其特性进行了讨论。在此基础上 ,提出了木糖醇悬浮液过滤与干燥的工艺条件 ,这些结果可作为新工艺设计和老工艺改造的依据。     

Mathematical Modeling of Kiln Drying of Softwood Timber: Model Development, Validation, and Practical Application

Mathematical modeling of wood drying is a powerful tool to better understand and quantify the effects of wood properties as well as the effects of drying and post-drying treatment conditions on drying and thus the wood drying models can be used to improve drying quality. The models that have been developed can be divided into three categories: models for drying a single board, models for drying a kiln-wide stack, and models for drying stress and deformation. The single-board drying model employs comprehensive heat and moisture mass transfer equations and can be used to investigate the influence of wood variability. The kiln-wide drying model, which is based on the transfer processes between wood and the drying medium, is able to examine the influence of drying schedules and wood properties. The stress model can predict stress development in drying and stress relief in final steam conditioning and post-kiln treatment. An integrated model can be used to optimize drying schedules and develop strategies for high-quality dried timber.     

Effect of Oven Drying,Microwave Drying,and Silica Gel Drying Methods on the Volatile Components of Ginger (Zingiber officinale Roscoe) by HS-SPME-GC-MS

Fresh or dried ginger is a common traditional Chinese medicine as well as an important spice in China. The volatile components of ginger play important roles in its flavor and bioactivities. In this work, headspace solid-phase microextraction followed by gas chromatography–mass spectrometry (GC-MS) was used to study the effects of oven drying, microwave drying, and silica gel drying methods on the degree of dehydration and volatile components of ginger. Sixty compounds were identified by GC-MS. The major volatile compounds were zingiberene (26.4–37.1%), β-phellandrene (7.4–12.9%), β-sesquiphellandrene (10.2–12.8%), and geranial (6.6–8.1%). The volatiles of silica gel–dried ginger were similar to those of fresh ginger. Microwave-dried ginger had a higher content of zingiberene and satisfactory dehydration efficiency. The result showed that microwave and silica gel can be used in drying of ginger to maintain the taste and appearance of fresh ginger.     

厢式压滤机滤布自动冲洗机构设计改进与对比分析

介绍了厢式压滤机常用的几种自动冲洗滤布装置的结构、存在的问题及相应的改进。     

洗衣机专用聚丙烯的开发与生产

根据北京燕山石油化工股份有限公司化工二厂第二聚丙烯车间试生产洗衣机专用聚丙烯的情况,探讨了洗衣机专用内烯生产的工艺控制,并对产品质量进行了评价。     

On-Line Determination of Water Activity at the Lean Surface of Meat Products During Drying and Its Relationship with the Crusting Development

Abstract

One of the main problems in drying of meat products is the surface hardening or crusting. The crusted surface layer is harder and less permeable than the inner part of the product. A dramatic increase of hardness during drying in dry-cured meat products has been found when the water content reaches a critical value. The water content can be related with the water activity by sorption isotherms. Therefore, an on-line measurement of the water activity at the surface (a_ws) could be used by the control system in order to avoid the crusting problem. The aim of this study was to evaluate a methodology for the on-line water activity determination at the lean surface of raw or salted meat during drying and relate this determination with the crusting development. Water activity at the surface was estimated from the heat balance (a_ws ^h) in salted meat slices and in unsalted and in salted loin samples. The proposed methodology was able to monitor the a_ws in both products. The estimated a_ws ^h was related with the crusting development in loin samples, showing its potential application in control systems for avoiding the crusting development during the drying of meat products.     

On-Line Determination of Water Activity at the Lean Surface of Meat Products During Drying and Its Relationship with the Crusting Development

One of the main problems in drying of meat products is the surface hardening or crusting. The crusted surface layer is harder and less permeable than the inner part of the product. A dramatic increase of hardness during drying in dry-cured meat products has been found when the water content reaches a critical value. The water content can be related with the water activity by sorption isotherms. Therefore, an on-line measurement of the water activity at the surface (a_ws) could be used by the control system in order to avoid the crusting problem. The aim of this study was to evaluate a methodology for the on-line water activity determination at the lean surface of raw or salted meat during drying and relate this determination with the crusting development. Water activity at the surface was estimated from the heat balance (a_ws^h) in salted meat slices and in unsalted and in salted loin samples. The proposed methodology was able to monitor the a_ws in both products. The estimated a_ws^h was related with the crusting development in loin samples, showing its potential application in control systems for avoiding the crusting development during the drying of meat products.     

生漆天然可再生工业防腐利用的研究及开发

生漆作为天然涂料,拥有超久的生命力。生漆改性拓展了生漆应用领域。构筑信息交流平台,促进生漆产业发展。     

振荡流热管研究现状及在干燥系统中的应用研究

对振荡流热管及振荡流热管换热器研究现状进行了分析,并时振荡流热管换热器用于干燥余热回收系统进行了研究。结果表明,自激振荡流热管是一种高效的传热元件,利用这种热管研制出的高效换热器完全适用于干燥尾气的余热回收。