【正文】 作為蔗糖的替代品應(yīng)用于食品工業(yè)，為葡萄糖的應(yīng)用開拓了更為廣闊的領(lǐng)域。植物可通過光合作用產(chǎn)生葡萄糖。葡萄、無花果等甜果及蜂蜜中，游離的葡萄糖含量較多。葡萄糖分子中的醛基，有還原性，能與銀氨溶液反應(yīng)被氧化成葡萄糖酸，醛基還能被還原為己六醇，分子中有多個羥基，能與酸發(fā)生酯化反應(yīng)。 純凈的葡萄糖為無色晶體，有甜味但甜味不如蔗糖，易溶于水，微溶于乙醇，不溶于乙醚。能補(bǔ)充體內(nèi)水分和糖分，具有補(bǔ)充體液 、供給能量、補(bǔ)充血糖、強(qiáng)心利尿、解毒等作用 。 例如葡萄糖是生命活動中不可缺少的物質(zhì)，直接參與人體內(nèi)新陳代謝過程。 關(guān)鍵詞 ： 四效錯流 糖液 蒸發(fā)器 降膜 河北工業(yè)大學(xué) 2020 屆本科畢業(yè)設(shè)計(jì)說明書 畢業(yè)設(shè)計(jì)（論文）外文摘要 Title:Annual output of 30,000 tons of sugar concentration process and equipment design Abstract： Sugar has medical value and restore system function, is the pharmaceutical , food and essential raw materials and additives.. Such as life activities glucose is indispensable substances, directly involved in the metabolic processes in the human body . To supplement the body of water and sugar , with rehydration , the supply of energy , added sugar, cardiac diuretic , detoxification effect . However, in a variety of pharmaceutical and food production process, the sugar concentration is low , resulting in low productivity ,so that it can not meet production needs, which requires a large amount of water distilled off by concentration to obtain a high concentration of sugar . The design uses four crossflow effect evaporation , evaporation equipment for the use of forced circulation outside heated falling film evaporator , the design of process and design, strength design and structural design , drawing sugar evaporation process flow diagram , equipment and facade layout and the heating chamber , the separation chamber , liquid distributor and atmospheric condensers and other equipment assembly drawings and parts diagram . Keywords： Four efficiency crossflow Sugar Evaporator Falling film 河北工業(yè)大學(xué) 2020 屆本科畢業(yè)設(shè)計(jì)說明書 目錄 1 引言 ............................................................................................................................. 1 物料的介紹 ........................................................................................................ 1 ..................................................................................................... 1 2 工藝流程圖的確定 ........................................................................................................ 2 蒸發(fā)過程分類選擇 .............................................................................................. 2 單效蒸發(fā)與多效蒸發(fā)的確定 ..................................................................... 2 ...................................................................... 3 效數(shù)的確定 ........................................................................................................ 3 加料方式的選擇 ................................................................................................. 3 蒸發(fā)設(shè)備的確定 ................................................................................................. 5 3 工藝計(jì)算 ...................................................................................................................... 5 物料衡算 ............................................................................................................ 5 熱量衡算 ............................................................................................................ 6 各效溶液的濃度 ....................................................................................... 6 蒸發(fā)器各效壓強(qiáng)的確定 ............................................................................ 6 溫差損失的確定 ....................................................................................... 7 各效糖液的焓值 ....................................................................................... 9 各效參數(shù)的確定 ....................................................................................... 9 熱量衡算 ............................................................................................... 10 傳熱面積的確定 ................................................................................................11 重新分配各效有效溫差 ...........................................................................11 各效參數(shù)的確定 ..................................................................................... 12 ................................................................................................ 13 ............................................................................................ 14 蒸發(fā)器的主要結(jié)構(gòu)工藝尺寸的設(shè)計(jì) ................................................................... 15 .............................................................................. 15 .............................................................................. 23 室結(jié)構(gòu)設(shè)計(jì) ........................................................................... 31 大氣冷凝器的設(shè)計(jì)計(jì)算 ..................................................................................... 43 需要的冷卻水量 W的確定 ....................................................................... 43 筒體直徑的確定 ..................................................................................... 43 大氣冷凝器各管口直徑的確定 ................................................................ 44 淋水板參數(shù)的確定 ................................................................................. 44 ......................................................................................... 45 ................................................................................................ 45 泵的選擇 .......................................................................................................... 45 結(jié)論 ............................................................................................................................... 47 河北工業(yè)大學(xué) 2020 屆本科畢業(yè)設(shè)計(jì)說明書 參考文獻(xiàn) ........................................................................................................................ 48 致謝 ............................................................................................................................... 49 河北工業(yè)大學(xué) 2020 屆本科畢業(yè)設(shè)計(jì)說明書 1 1 引言 物料