CN205340191U - 一种乙醇回收提纯的精馏冷凝装置 - Google Patents
一种乙醇回收提纯的精馏冷凝装置 Download PDFInfo
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Abstract
一种乙醇回收提纯的精馏冷凝装置,由循环加热器、进料管、精馏塔、液体分布器、填料、塔釜加热器、冷凝器和回收容器组成。待回收的乙醇溶液通过循环加热器预加热,从精馏塔中节进入,精馏塔内设置液体分布器和填料,精馏塔下设置塔釜加热器,塔釜加热器用于二次加热,精馏塔上方出口连接冷凝器,冷凝器内设置回流管,通过冷却水冷却得到提纯乙醇,冷凝器下方设置回收容器。本实用新型的有益效果在于精馏塔内外均设置加热器,内外加热器额单独加热也可同时加热,精馏塔内设置液体分布器,可减少由于液体不良分布所引起的放大效应,充分发挥填料的效率。
Description
技术领域
[0001]本实用新型涉及一种精馏冷凝装置,特别是一种乙醇回收提纯的精馏冷凝装置。
背景技术
[0002]在传统制药生产中,往往需要93%以上高浓度乙醇作为萃取溶剂,而且使用后又会产生大量不同浓度的乙醇稀溶液,为了节能、降耗并回收重新利用,通常采用对乙醇稀溶液进行精馏提纯冷凝再用。
[0003]目前在制药企业中有两种生产方法,即间歇生产和连续生产:
[0004]①间歇精馏的主要设备包括塔节、填料、塔釜及塔釜加热器,其生产过程为分批次向塔釜加入浓度为30%以上稀乙醇进行间歇生产,根据塔釜、塔顶温度调节回收与回流流量比,来回收浓度为93%以上的高浓度乙醇,此方式仅适用于小批量的生产,对残液排放浓度控制在3 %以下,耗能且生产效率低。
[0005]②连续精馏的主要设备包括塔器、填料、外循环加热器,其生产过程为通过塔器外部循环加热器将浓度为30%的稀乙醇加热后连续进液,根据塔釜、塔顶温度调节恒定回收与回流流量比,来回收浓度为93%以上的高浓度乙醇,此方式适用于大批量连续生产,对残液排放浓度控制在5 %以下,且运转费用和成本相应较高。
发明内容
[0006]本实用新型的目的是针对上述问题,提供一种回收效率高、运转费用低、既适于间歇小批量的生产又能适应连续生产的用于乙醇回收提纯生产的精馏塔。
[0007]本实用新型所采取的技术方案如下:
[0008] —种乙醇回收提纯的精馏冷凝装置,由循环加热器、进料管、精馏塔、液体分布器、填料、塔釜加热器、冷凝器和回收容器组成。待回收的乙醇溶液通过循环加热器预加热,通过进料管从精馏塔中节进入,精馏塔内设置液体分布器和填料,精馏塔下设置塔釜加热器,塔釜加热器用于二次加热,精馏塔上方出口连接冷凝器,冷凝器内设置回流管,通过冷却水冷却得到提纯乙醇,冷凝器下方设置回收容器。其特征在于精馏塔内外均设置加热器,内外加热器额单独加热也可同时加热,精馏塔内设置液体分布器,可减少由于液体不良分布所引起的放大效应,充分发挥填料的效率,冷凝器内设置螺旋冷凝回流管,加大接触面积,提高冷凝效率。
[0009]本实用新型的优点和有益效果是:
[0010]本实用新型的优点是:既适于间歇小批量回收又能适应大批量连续回收乙醇,实现乙醇的循环利用,可大大降低运行成本,提高乙醇利用率和生产效率:精馏塔内外均设置加热器,内外加热器额单独加热也可同时加热,精馏塔内设置液体分布器,可减少由于液体不良分布所引起的放大效应,充分发挥填料的效率,冷凝器内设置螺旋冷凝回流管,加大接触面积,提高冷凝效率,当两种加热方式同时使用时,其生产能力比连续生产方式提高15%-20%;当两种加热方式同时使用时,其残液排放浓度< 2%,比连续及间歇生产方式提高3%至5% ;当两种加热方式同时使用时,其工作效率比连续生产方式提高20%。
附图说明
[0011]下面结合附图和实施例对本实用新型进一步说明。
[0012]图1是本实用新型实施例的一种乙醇回收提纯的精馏冷凝装置的结构示意图。
[0013]图中1、循环加热器2、加热丝3、进料管4、精馏塔5、液体分布器6、填料7、塔釜加热器8、冷凝器9、冷凝回流管10、回收容器。
具体实施方式
[0014]如图1所示,一种乙醇回收提纯的精馏冷凝装置,由循环加热器1、加热丝2、进料管
3、精馏塔4、液体分布器5、填料6、塔釜加热器7、冷凝器8、冷凝回流管9、回收容器1、组成。待回收的乙醇溶液通过循环加热器I,由加热丝2加热,从进料管3进入精馏塔4中节,精馏塔4内设置液体分布器5和填料6,精馏塔5下设置塔釜加热器7,塔釜加热器7用于二次加热,精馏塔4上方出口连接冷凝器8,冷凝器8内设置冷凝回流管9,通过冷却水冷却得到提纯乙醇,冷凝器8下方设置回收容器10。其特征在于精馏塔4内外均设置加热器,内外加热器额单独加热也可同时加热,精馏塔4内设置液体分布器5,可减少由于液体不良分布所引起的放大效应,充分发挥填料6的效率,冷凝器8内设置螺旋冷凝回流管,加大接触面积,提高冷凝效率。
[0015]以上对本实用新型的一个实施例进行了详细说明,但所述内容仅为本实用新型的较佳实施例,不能被认为用于限定本实用新型的实施范围。凡依本实用新型申请范围所作的均等变化与改进等,均应仍归属于本实用新型的专利涵盖范围之内。
Claims (5)
1.一种乙醇回收提纯的精馏冷凝装置,由循环加热器、进料管、精馏塔、液体分布器、填料、塔釜加热器、冷凝器和回收容器组成,其特征是:精馏塔内设置液体分布器和填料,精馏塔下设置塔釜加热器,塔釜加热器用于二次加热,精馏塔上方出口连接冷凝器,冷凝器内设置回流管,通过冷却水冷却得到提纯乙醇,冷凝器下方设置回收容器。
2.根据权利要求1所述的一种乙醇回收提纯的精馏冷凝装置,其特征是:所述的精馏塔内外均设置加热器。
3.根据权利要求1所述的一种乙醇回收提纯的精馏冷凝装置,其特征是:所述的循环加热器和塔釜加热器可同时加热也可单独加热。
4.根据权利要求1所述的一种乙醇回收提纯的精馏冷凝装置,其特征是:所述的精馏塔内设置液体分布器和填料,可减少由于液体不良分布所引起的放大效应,充分发挥填料的效率。
5.根据权利要求1所述的一种乙醇回收提纯的精馏冷凝装置,其特征是:所述的冷凝器内设置螺旋冷凝回流管,加大接触面积,提高冷凝效率。
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