浸出车间汽提预冷凝器设计及节能效果分析  

Stripper pre-condenser design and energy-saving analysis in leaching plant

作　　者：陈玮婷 温小荣 梁椿松 CHEN Weiting;WEN Xiaorong;LIANG Chunsong(Myande Group Co.,Ltd.,Yangzhou 225127,Jiangsu,China)

机构地区：[1]迈安德集团有限公司,江苏扬州225127

出　　处：《中国油脂》2022年第12期150-152,共3页China Oils and Fats

摘　　要：节能降耗对提升浸出车间生产线竞争力具有重要的意义。汽提塔气相温度可达95℃,其中含有49%的水蒸气和51%的正己烷。研究汽提塔气相冷凝特性发现,在操作压力为35 kPa下,温度从95℃下降至40℃的过程中,正己烷不会发生冷凝,水蒸气从70℃开始冷凝,温度降至54℃时,冷凝率可达88%。据此,通过增加汽提预冷凝器可对冷凝产生的热量进行回收,以日处理1000 t大豆浸出车间为例,通过换热器设计软件EDR对汽提预冷凝器进行设计、选型、校核,同时对节能效果进行评价。结果表明,通过设计、选型,换热面积为55 m^(2)、型号为BEM 500×4500 mm的列管换热器可以将新鲜溶剂温度从48℃加热至58℃。分析节能效果发现,浸出车间增加汽提预冷凝器,吨大豆可节约蒸汽8.2 kg、节约电量0.1 kW·h,具有很高的投资价值。Energy-saving and cost-reducing have great significance for improving the leaching plant production line competitiveness.The temperature of stripper vapor could reach 95℃,which including 49%water steam and 51%n-hexane.By studying condensation characteristics of the stripper vapor,it found that n-hexane did not condense when the temperature reduced from 95℃to 40℃under the pressure of 35 kPa,while water steam begined to condense at 70℃and the condensation rate could reach 88%as the temperature reduce to 54℃.Therefore,the heat generated by condensation could be recovered by adding a stripper pre-condenser.The stripper pre-condenser was designed,selected and calibrated by the heat exchanger design software EDR with the daily processing of 1000 t soybean leaching plant as an example,and the energy-saving effect was also evaluated.The results showed that through the design and selection,the column heat exchanger with a heat transfer area of 55 m~2and the model of BEM 500×4500 mm could heat the fresh solvent from 48℃to 58℃.Adding the stripper pre-condenser in leaching plant could reduce the steam and electricity of 8.2 kg and 0.1 kW·h,respectively,which had great investment value.

关 键 词：汽提预冷凝器 蒸汽耗量 EDR 节能降耗 

分 类 号：TS223[轻工技术与工程—粮食、油脂及植物蛋白工程] TS224[轻工技术与工程—食品科学与工程]