操作压力与精馏节能

讨论了精馏节能技术对操作压力的要求，分析了压力变化对精馏过程的影响。结合作者的实际经验阐述改变精馏操作压力所获得的节能效果．     

热泵精馏的节能工艺流程分析

热泵精馏是一项高效节能技术,本文拟介绍几种基本的热泵精馏流程,分析它们的特点及适用条件,以供进行热泵精馏可行性设计时参考。     

双效精馏节能影响因素的研究

介绍了双效精馏的原理和几种典型的操作方式,阐明了双效精馏的选择依据和应用原则.结合实际操作数据,对影响双效精馏节能的影响因素进行分析,讨论了回流比、塔的操作压力等对精馏系统节能的影响.     

非绝热精馏节能

本文介绍几种非绝热精馏节能流程及其特点、为温差较大或低温精馏过程的合理节能提供参考。     

精馏过程的节能技术

论述了精馏过程的节能原理，从改变操作条件、改变流程等方面提出了多项节能措施     

非绝热精馏节能分析

文章介绍几种非绝热精馏节能流程，分析它们的特点及适用条件，为温差较大或低温精馏过程的合理节能提供参考。     

化工节能中的热泵精馏工艺流程分析

介绍了几种典型的精馏热泵流程 ,分析了它们的特点、应用条件及节能效果 ,供进行热泵精馏可行性设计时参考。     

用ASPEN PLUS软件分析双效精馏节能的影响因素

结合实际数据,用ASPEN PLUS软件分析了5种双效精馏中两效之间的原料分配及前效的分离纯度对节能率的影响,阐述了实现节能最佳应遵循的原则。与其他4种双效精馏相比,并流型的节能效果最好,与单效精馏相比可节约热能49.14%。     

高效节能的热泵技术

简要介绍了几种典型的热泵精馏和热泵干燥流程,并对其应用、特点及节能效果进行了讨论。     

MVR热泵精馏处理回收稀DMAC水溶液

针对稀DMAC水溶液中DMAC的回收,提出了三种机械蒸汽再压缩(MVR)热泵精馏方案,即MVR-常规两塔精馏工艺、三级MVR单塔精馏工艺和三级MVR三塔精馏工艺.采用Aspen Plus化工流程模拟软件,以能耗最低为目标函数,对以上三种工艺方案分别进行了模拟与优化,得到了每种热泵精馏方案合适的工艺参数和设备参数.研究结果表明:与常规单塔精馏工艺相比,以上三种MVR热泵精馏工艺节能分别为81.7％、69.9％和90.3％;因此就节能而言,采用三级MVR三塔精馏工艺为最佳;基于综合经济效益评价,MVR-常规两塔精馏工艺为处理本体系的最佳精馏工艺.     

炼油厂低温余热综合利用技术方案

炼油企业既是二次能源的生产企业,又是能源消耗的大户,面对“十二五”节能减排目标,各炼油企业压力重重.近年来,随着装置技术进步和先进节能技术的应用,炼厂能源利用水平有了大幅提高,但大部分炼厂在低温余热利用方面还存在巨大的节能潜力.针对目前炼厂低温余热概念不统一、装置热联合程度差、炼厂低温余热利用不充分等问题,通过调研大连石化、广西石化等几个大型炼厂的实际情况,定义了“80～170℃工艺物流所具有的未被工艺过程利用的热量为炼油厂低温余热”的概念;在此基础上,分析常减压、催化裂化等炼厂内低温余热热源,以及气分、油罐加热、制冷站等热阱的一般情况.根据炼油厂热源产生与热阱利用的特点,提出“温度对口,梯级利用”的低温余热利用原则,以及“优先同级、重视升级”的低温余热综合利用方案.     

Residue curves map analysis for tert-amyl methyl ether synthesis by reactive distillation in kinetically controlled conditions with energy-saving evaluation

Distillation is a largely used separation operation, but at the same time it is intensively energy consuming. Distillation columns need huge amount of energy due to evaporation steps involved; more than half of the process heat distributed to plant operations ends up in the reboilers of distillation columns. ∞/∞ analysis is a framework that allows studying distillation systems, checking the feasibility, detecting multiple steady states and getting the influence of the distillate flow rate and recycle streams on purities in early stage of process design. Also, ∞/∞ analysis is useful to evaluate new alternatives for existing processes and to propose energy-efficient alternatives by process integration. Process intensification is an issue of constant interest, providing strategies to develop more effective and cheaper technologies with lower environmental impact. The originality of this paper lies in the applicability of this framework to kinetically controlled reactive distillation including hybrid systems. TAME synthesis is used as an illustrative example. Energy savings obtained by using reactive distillation are evaluated comparing with the traditional system consisting of reactor and distillation columns. The solution proposed, subsequent to the validation by rigorous simulation, offers a 20% decrease in the number of stages and a reboiler energy saving of 10%.     

Optimal insertion of energy saving technologies in industrial processes: a web-based tool helps in developments and co-ordination of a European R&D project

If improving energy efficiency of an industrial process system by inserting energy saving technologies reveals itself as an efficient approach, several difficulties are to be overcome: (1) the optimal insertion has to be examined at the global level considering the possible synergy or mutual exclusion of the different technologies to be inserted in a given industrial production site, (2) the R&D effort made in the development of new intensified energy saving technologies increases the number of technologies available on the market, (3) the size standardisation of the technologies on the market increases the difficulty of selecting the optimal technology and (4) the evolution of the prices on the market may influence the profitability of an ongoing project. The goal of the EXSYS II project was to integrate the knowledge of experts in energy saving technologies, processes and energy integration in order to develop methods and computer tools to help solving this problem. The consortium chose to use web-based tools for co-ordination and developments.     

提高机采井系统效率配套节能技术研究

针对目前大庆油田机采井节能措施覆盖率仅为39．33％,平均系统效率仅为24．25％的现状,试验研究了多杯等流型气锚技术、免清蜡技术和抽油机节能减速器等配套节能技术,并开展了节能示范区现场试验,试验结果表明以上节能技术均能够提高机采井的系统效率,达到了预期的效果。     

永磁调速节能技术在大功率循环水泵上的应用

永磁调速是目前最先进的非机械联接调速节能技术,本文对啮合面调整式大功率永磁调速器的构成、调速节能原理和应用情况做了简要阐述;分析胜利发电厂热网系统中的大功率循环水泵进行永磁改造后的调节特性,并与采用工频调速、变频调速两种方式的循环水泵进行节能效果的对照试验,将其应用情况以及节电经济性进行了分析,试验结果表明永磁调速节能效果明显,在大功率水泵风机等场合具有广阔的应用前景。     

地震灾区灾后重建工程建设中的节能减排

地震灾区灾后重建工作是一个系统和密集的施工工程,施工机械多,能耗大、建材耗量大、周期相对长并有明显的建筑垃圾再生建材利用特征。讨论了灾区重建中开展工程建设节能减排的重要性和途径,建立了相关的全能耗计算和污染物减排计算方法,并据此建立了节能减排的评估模型。该模型的建立是评估工程建设施工技术节能减排的前提。根据此模型,利用建筑垃圾再生建材、优化施工机械、合理安排物流,都可减少施工能耗、提升重建过程的节能减排水平     

我国工业余热回收利用技术综述

节能减排主要依靠工业领域,工业余热利用是重要内容.本文从余热利用过程能量转换情况角度,概述了国内用于余热利用的热交换技术、热功转换余热发电技术及余热制冷制热技术及其设备的技术特点及应用概况,分析了工业余热利用中的存在的问题,认为需进一步推广余热锅妒及低温汽轮机余热发电技术,提高中高温余热的利用率,需要强化研究并掌握有机...     

试论“节能评估”典型行业节能新技术

文中论述了节能评估和审查过程中经常遇到的生产工艺和设备的节能分析,从这些工艺和设备的公共用能分析出发,阐述了能源的供应方式、能源的品种选择以及公共设施的节能,给出了用电、用蒸汽的节能新技术。同时对于化工行业、有色金属行业、建材行业等典型行业进行了节能分析,介绍了几种这些行业的节能新技术,供相应行业节能决策参考。     

Review on heat recovery technologies for building applications

Recently, there is growing demand for energy saving technologies in buildings due to global warming and environmental impact issue. As a result to this, energy-efficient technologies are becoming more popular amongst researchers and designers. In this regards, to fulfil energy conservation demands, researchers have focused on the development of advance heat or energy recovery with energy-efficient ventilation system. The aim of this paper is to review heat or energy recovery technologies for building applications. The reviews were discussed according to the concept and classification of heat or energy recovery based on types and flow arrangement. The developments of these technologies in integrated energy-efficient system such as mechanical and passive ventilation, air conditioning, dehumidification and photovoltaic panel have also been presented.