CAJ | 학술논문

精馏作为过程工业中最重要和最常用的分离手段，是耗能最大的单元操作。精馏塔一般从再沸器输入热量，从冷凝器取走热量，利用某些塔高温位的冷凝热加热其他塔的再沸器，并将单塔节能技术与过程集成相结合，实现塔系的热集成，可充分挖掘系统内部的节能潜力，达到减少公用工程消耗的目的。本文通过对某化工厂的苯乙烯装置精馏塔系的分析，通过各个塔的温焓图之间的关系，提出了精馏塔系内部热集成的措施，包括直接热集成、调压热集成和双效精馏与间接热集成耦合等3种方案。对于后两个热集成方案，采用 Aspen Plus模拟改造后精馏塔的变化并验证了方案的可行性。结果表明，苯乙烯装置采用该热集成措施能明显节省高品位蒸汽的消耗，降低能量费用。
정류작위과정공업중최중요화최상용적분리수단，시모능최대적단원조작。정류탑일반종재비기수입열량，종냉응기취주열량，이용모사탑고온위적냉응열가열기타탑적재비기，병장단탑절능기술여과정집성상결합，실현탑계적열집성，가충분알굴계통내부적절능잠력，체도감소공용공정소모적목적。본문통과대모화공엄적분을희장치정류탑계적분석，통과각개탑적온함도지간적관계，제출료정류탑계내부열집성적조시，포괄직접열집성、조압열집성화쌍효정류여간접열집성우합등3충방안。대우후량개열집성방안，채용 Aspen Plus모의개조후정류탑적변화병험증료방안적가행성。결과표명，분을희장치채용해열집성조시능명현절성고품위증기적소모，강저능량비용。
Distillation is the most important and commonly used separation method in the process industry,and is the operation unit with maximal energy consumption. For a column,heat is generally supplied from a reboiler,and rejected from a condenser. Using the condensing heat of one column to heat another column’s reboiler,and combining energy saving measures of a single column with process integration,namely heat integration of columns,is an effective way to reduce utilities consumption. In this paper,by analyzing the distillation system in a styrene plant,with the relative position of T-H diagram for each column,three measures of heat integration schemes were proposed for the columns system,including direct heat integration,heat integration with pressure adjustment and coupling double-effect distillation with indirect integration. For the last two measures,Aspen Plus was used to simulate the operation changes and verify the feasibility of the schemes. The consumption of high quality steams and related cost could be significantly reduced.