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热泵精馏在气体分馏装置丙烯塔中的应用分析 总被引:7,自引:0,他引:7
将热泵精馏技术应用于气体分馏工艺的丙烯精馏塔,选择再沸器液体闪蒸式热泵精馏系统代替常规精馏。采用ChemCAD流程模拟软件分别对丙烯塔常规精馏与热泵精馏系统进行模拟计算,分析比较了2种工艺的节能效率和经济性。结果表明,与单塔常规精馏相比,热泵精馏分离系统节能效率高,经济效率显著,冷凝器节能83.07%,再沸器节能82.96%;能源消耗降低60.5%。 相似文献
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常规精馏塔需从塔顶冷凝器取出热量,从塔釜再沸器加入热量,其消耗的能量为精馏塔的主要操作费用。热泵利用机械能或电能将低温位热能提高到高温位热能,在精馏中将塔顶气相加压冷凝后作为塔底再沸器的热源,特别是在乙烯装置乙烯精馏中运用热泵,将乙烯冷剂的循环和乙烯精馏结合为一体,利用乙烯冰机将开式热泵用在乙烯精馏中,可节约能耗,降低生产成本。 相似文献
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乙烯装置丙烯精馏系统的模拟优化及应用 总被引:1,自引:0,他引:1
对中国石化中原石油化工有限责任公司乙烯装置丙烯精馏系统产品收率低的原因进行了模拟分析,阐述了该系统的操作优化措施及实际运用所取得的效果。 相似文献
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A generalized steady-state model is being developed for an internal heat integrated distillation column (IHIDiC). A procedure incorporating the Newton-Rapheon method is devised for solving the model equations. Separation of an ethanol-water binary mixture is simulated and analyzed with the model, Two pinch points are found within the process, making the separation ex-tremely difllcult and expensive. Two sharp fronts in the temp-erature and the composition profiles are being observed. With the introduction of heat integration, satisfactory separation may be obtained in a limited number of stages with lower reflux ratios. Increasing the pressure difference between the rectifylng and the strlpping sectlons, however, would bring about a reduced relative volatility between the two components involved, creating adverse separation performances. It is obvious that optimigation of the IHIDiC is of prime importance. 相似文献
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热集成变压精馏分离水-异丙醇-二异丙胺的工艺模拟 总被引:1,自引:1,他引:0
在分析水-异丙醇-二异丙胺体系共沸特性的基础上,提出了热集成变压精馏工艺. 采用UNIQUAC-RK方程计算气液相平衡数据,并利用实验数据在模拟压力范围内(0.004~1.0 MPa)对UNIQUAC方程中的二元交互作用参数进行修正. 利用ASPEN PLUS过程模拟软件中的RADFRAC严格精馏模型,对提出的热集成变压精馏工艺进行过程模拟与参数优化. 得到了热集成变压精馏分离水-异丙醇-二异丙胺体系的最佳工艺参数、塔内气液浓度分布及精馏塔设备参数等,并通过实验对模拟结果进行验证. 结果表明,热集成变压精馏工艺比常规的变压精馏工艺约节能34.3%. 相似文献
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简要介绍了甲醇精馏的主要任务以及甲醇精馏工艺流程的选择和发展,详细介绍了节能型3+1塔的精馏工艺流程及特点,并对甲醇精馏的技术控制要点和节能降耗进行了工艺分析。 相似文献
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The operation of an ideal heat integrated dlstillation columan (HIDiC) is addressed .Five Kinds of control configurations, i.e. single-loop control, multi-loop control, multivariable internal model control (IMC), modified multlvariable internal model control (MIMC) and nonlinear process model-based control (NPMC), are designed and applied to the process. Simulation results demonstrate that all of the above control confaguratloam ere valid for product quality control. NPMC control configuration is found to be the best one among all the alternatives. It can readily realize setpoint transitions and conduct effectively against external disturbance. MIMC control configuration ranks second in the row for its regulatory responses to feed composition disturbances with relatively extended setting time, Next comes from the multi-loop control configuration, which is moee or lees handicapped by its greater deviations and overshootings. IMC control configuration can not compete with the multi-loop control configuration because it is extremely sensitive to operating condition changes. Single-ioop control configuration is the worst one among all the mentioned control configurations. Its responses for the uncoutrolled end products are extremely sluggish. 相似文献
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从综合的角度详细讨论了热泵精馏的原理,提炼出了用于综合的热泵精馏规则,并开发了综合所用的热泵精馏简捷经济评价方法,提出了一个两水平综合策略,给出了热泵精馏综合步骤。实例研究表明,本文开发的算法及提出的规则用于热泵热集成精馏流程的综合,能够得出最优的絷泵精馏流程。 相似文献
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压缩式热泵在醋酸丁酯酯化工艺中的应用探讨 总被引:2,自引:0,他引:2
本文对压缩式热泵在醋酸丁酯酯化工艺中的应用进行的探讨,分别就系统的热力性能和经济性进行了分析。计算表明,使用热泵可提高系统经济性,节能效果显著。 相似文献