发布时间 : 星期一 文章年产2万吨结晶木糖醇生产车间设计更新完毕开始阅读024708653169a4517723a363
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北京理工大学珠海学院2014届本科生毕业设计
年产2万吨结晶木糖醇生产车间设计
摘 要
随着人们对木糖及木糖醇的特殊功能的了解，木糖醇被广泛用于食品、医药等领域；如利用木糖醇渣作基料成功开发出食用菌产品[1]，也可作为糖尿病患者的辅助治疗剂。本设计是采用木糖结晶法来生产结晶木糖醇。结晶木糖醇的生产步骤是首先将玉米芯进行清洗，后送入水解罐中，再加入硫酸进行酸解；通过中和脱色罐进行中和脱色，接着将中和脱色液进行板框过滤，后进入离子交换柱吸附除杂质；再进行第一次蒸发浓缩，继续进行二次离子交换，和二次蒸发浓缩；将浓缩液打入卧式结晶机中进行木糖结晶，然后对其连续氢化，使木糖液转化为木糖醇液，最后利用离子交换柱进行交换，蒸发器蒸发浓缩木糖醇液；然后采用梯度降温对浓缩液进行结晶，通过离心机分离木糖醇晶体与母液，得到木糖醇晶体，利用蒸汽去除水分，最获得晶体木糖醇成品。本设计是采用木糖结晶法可以提高和净化结晶木糖醇的质量[2]。设计内容包括工艺原料的选择；生产设备选型；工艺中的物料衡算，以及工艺流程图和车间布置图。 关键词：木糖；木糖醇；玉米芯；木糖结晶法
北京理工大学珠海学院2014届本科生毕业设计
An annual output of 20000 tons of crystalline xylitol production
workshop design
Abstract
Along with the special function of xylose and xylitol understanding, xylitol is widely used in food, medicine and other fields; such as the use of xylitol slag as the raw material of edible fungus products successfully developed [1], also can be used as the auxiliary treatment of diabetes patients. This design is the use of xylose crystallization method to produce crystalline xylitol. The production steps crystalline xylitol is first cleaned the corncob, sent in the hydrolysis tank, adding sulfuric acid solution is neutralized by neutralization; decolorization decolorization tank, then neutralizing decoloring solution of plate and frame filter, after entering the ion exchange column adsorption impurities; then the first evaporation, continue to carry out a two ion exchange, and two evaporation; xylose crystallization will concentrate in the horizontal crystal machine, and then the continuous hydrogenation of xylose into xylitol, liquid liquid, the ion exchange column exchange, evaporator evaporation and cooling crystallization of xylitol liquid; the concentrate gradient, separate the xylitol crystal and the mother liquor by centrifuge, to obtain xylitol crystal, removing water use steam, the obtained crystal xylitol products. This design is the use of xylose crystallization method can improve the quality of [2] purification and crystallization of xylitol. Design content including the process of selection of raw materials; production equipment; material balance in the process of calculation, and process flow diagrams and workshop layout. Keywords: Xylose；Xylitol ；Corn cob ；Xylose crystallization method
北京理工大学珠海学院2014届本科生毕业设计
目 录
1 前言 ............................................................................................................................1
1.1木糖醇的简介 ......................................................................................................1 1.2木糖醇的物化性质 ...............................................................................................1
1.2.1物理性质...................................................................................................1 1.2.1化学性质...................................................................................................1 1.3木糖醇的用途 ......................................................................................................2 1.4木糖醇的发展与意义............................................................................................2 1.5木糖醇工艺设计的简述 ........................................................................................2 2 材料的确定于生产工艺的论述......................................................................................4
2.1材料的确定..........................................................................................................4
2.1.1木糖醇的原料............................................................................................4 2.1.2木糖醇的辅料............................................................................................4 2.2木糖醇工艺的论述 ...............................................................................................4
2.2.1水洗和水解工序 ........................................................................................4 2.2.2中和和脱色工序 ........................................................................................5 2.2.3一次离子交换工序.....................................................................................6 2.2.4一次蒸发浓缩工序.....................................................................................6 2.2.5二次离子交换工序.....................................................................................7 2.2.6二次蒸发浓缩工序.....................................................................................7 2.2.7结晶工序...................................................................................................7 2.2.8加氢工序...................................................................................................7 2.2.9三次离子交换工序.....................................................................................8 2.2.10三次浓缩工序 ..........................................................................................8 2.2.11再结晶工序 .............................................................................................8 2.2.12离心分离工序 ..........................................................................................8 2.2.13干燥工序 .................................................................................................9 2.2.14内外包装工序 ..........................................................................................9
3 木糖醇工序的物料衡算 .............................................................................................. 10
3.1水洗和水解工序的物料衡算 ............................................................................... 10
3.1.1水洗和酸预处理的物料衡算..................................................................... 10 3.1.2水解，水洗回收糖的物料衡算 ................................................................. 11 3.2中和和脱色工序的物料衡算 ............................................................................... 13 3.3一次离子交换工序的物料衡算............................................................................ 15 3.4一次蒸发浓缩工序的物料衡算............................................................................ 16 3.5二次离子交换工序的物料衡算............................................................................ 17 3.6二次蒸发浓缩工序的物料衡算............................................................................ 18 3.7结晶工序的物料衡算.......................................................................................... 19 3.8加氢工序的物料衡算.......................................................................................... 19 3.9三次离子交换工序的物料衡算............................................................................ 20 3.10三次浓缩工序的物料衡算 ................................................................................. 21 3.11再结晶工序的物料衡算 .................................................................................... 22