球补替代方补 节能效果显著

介绍了球形补偿器在中温中压管道中的应用，阐述了减少降温、压降及热损失的设计措施，对提高球形补偿器的节能效果有实际意义。     

我厂隧道窑风机改造节能效果显著

1．前言能源的利用状况是企业技术水平和管理水平的综合体现，是衡量企业技术进步的重要标志。风机是陶瓷厂的高能耗动力设备，这一设备的更新改造对于节能降耗有着很大的经济意义。2．改造的背景我厂78M素烧隧道窑排烟风机的原设计是采用y4一73N012D型，配套功率为30KW，长期运转以来，经实测，效率在好转左右，这对于连续运行的动力设备来说，给电耗造成巨大的浪费，因此，风机的节能降耗被列入了我厂的重要议事日程。3．实施经过和效果首先根据78M素烧隧道窑所需要的风量，风压等要求，选择了南通风机厂生产的y‘一vsN010D风机。该风…     

双星集团节能减排效果显著

“十一五”以来,双星集团有限责任公司以科学发展观为指导,紧紧围绕“节能、降耗、减污、增效”展开工作,通过创新管理、创新技术,不断加大节能减排力度,推广创新节能减排经验。2009年该公司通过节能减排节省费用6000多万元,为企业提高效率、降低费用起到了积极的推动作用,成为国家低碳经济发展的典型,实现了“双赢”。     

节能效果显著的碳化流程改造

本文介绍了山东宁阳化肥厂改造碳化工段的经验，通过改造实现了稳产高产，节能降耗，效果显著。     

瑞陶达窑炉经检测节能效果显著

近日,佛山市瑞陶达陶瓷机械设备有限公司自主研发的热风增氧助燃技术的窑炉委托广州权威能源检测机构对窑炉节能改造效果进行了专业的评估。     

济南炼化防冻防凝节能效果显著

近日，济南炼化沥青车间根据公司对停工装置在冬季防冻凝工作中要“深度”节能的要求，迅速行动，集思广益，敢于颠覆传统，打破常规，改变以往的习惯做法，制定了切实可行的防冻凝方案并实施，取得了较好效果。     

扬子公司乙烯装置裂解炉节能改造效果显著

经过近1个月的运行,扬子石化公司烯烃厂改造投运的乙烯老区5号裂解炉,节能效果非常显著,其生产能力由45kt/a提高至60t/a;热效率由原来不足92%提高至94.5%。改造后的5号炉为CBL-Ⅵ型,辐射段炉管采用U型炉管,具有良好的传热、机械性能及裂解选择性;不仅具有良好的原料适应性(能够裂解石脑油、轻石脑油、液化气),同时还能够满足循环乙烷、丙烷的裂解需要,为扬子石化公司优     

电机无功就地补偿器在水泥厂的节能应用

1 引言 水泥厂是耗电大户,电耗在水泥成本中比例较高,如何降低吨水泥电耗是水泥企业关心的热点问题之一。近年实践证明,对电动机进行无功就地补偿,是一种安全可靠、简便易行见效快的节电措施。但目前水泥企业却应用不多。为了大力推广应用该项技术。本文就无功就地补偿器的工作     

Energy level of compensator states in (001) phosphorus-doped diamond

The energy level of acceptor-type compensator states in (001) phosphorus-doped diamond is examined by combining the techniques of cathodoluminescence analysis, Hall-effect measurements, secondary ion mass spectroscopy, and capacitance-voltage measurements. The capacitance-voltage properties of metal/n-type semiconductor contact are known to be a sensitive tool for evaluating deep levels. The slope of the inverse of the square of capacitance provides the distribution of space charge density in the n-type layer, and this density strongly depends on the relationship between the deep level and the surface Fermi level. In this study, we use this relationship to characterize the energy level of compensator states. The donor and acceptor densities in (001) n-type diamond are determined by low-temperature cathodoluminescence analysis and Hall-effect measurements. The electrical activity of doped phosphorus atoms is also discussed.     

空心墙体建筑的节能及经济性分析

对空心墙体的静态热阻计算考虑了对流和辐射对热阻的影响,并用非稳态传热理论和计算机模拟分析的方法,利用传递函数法求解新型节能空心墙体的传热过程,计算某建筑物的围护结构(传统实心墙体和新型空心墙体)的全年逐时能耗和总能耗,并根据计算结果进行节能分析和经济性分析,得出:建筑物采用节能空心墙体与传统实心墙体相比,夏季节能27 19%,冬季节能23 92%,其投资可在10a内回收。     

Mechanism analysis of solvent selectivity and energy-saving optimization in vapor recompression-assisted extractive distillation for separation of binary azeotrope

Octane and p-xylene are common components in crude gasoline, so their separation process is very important in petroleum industry. The azeotrope and near azeotrope are often separated by extractive distillation in industry, which can realize the recovery and utilization of resources. In this work, the vapor–liquid equilibrium experiment was used to obtain the vapor–liquid equilibrium properties of the difficult separation system, and on this basis, the solvent extraction mechanism was studied. The mechanism of solvent separation plays a guiding role in selecting suitable solvents for industrial separation. The interaction energy, bond length and charge density distribution of p-xylene with solvent are calculated by quantum chemistry method. The quantum chemistry calculation results and experiment results showed that N-formylmorpholine is the best solvent among the alternative solvents in the work. This work provides an effective and complete solvent screening process from phase equilibrium experiments to quantum chemical calculation. An extractive distillation simulation process with N-formylmorpholine as solvent is designed to separate octane and p-xylene. In addition, the feasibility and effectiveness of the intensified vapor recompression assisted extraction distillation are also discussed. In the extractive distillation process, the vapor recompression-assisted extraction distillation process is globally optimal. Compared with basic process, the total annual cost can be reduced by 43.2%. This study provides theoretical guidance for extractive distillation separation technology and solvent selection.     

溶剂(DMF)回收技术的改进及优化

介绍了国内外DMF回收节能技术,分析了腈纶装置中DMF回收工艺存在的不足.提出了先真空、浓缩,后常压提纯溶剂的回收新技术,以达到降低综合能耗、减少污染物的排放.同时,对比了新老工艺的运行效果,并进行了技术经济分析.结果显示新装置运行平稳,处理能力得以提高,实现了节能减排降耗效果,获取较大经济效益.     

Energy Analysis of Poly-hydroxybutirate (PHB) Drying Using a Combined Microwave/Rotating Pulsed Fluidized Bed (MW/RPFB) Dryer

The aim of this study was to investigate the drying kinetics and energy efficiency of a combined microwave/rotating pulsed fluidized bed (MW/RPFB) dryer to dry particles of poly-hydroxybutirate (PHB). In order to analyze the effects of microwaves and hot air conditions on the drying kinetics of PHB and energy efficiency, an experimental design technique was applied. Drying energy efficiencies were in the range of 12–30%, and an estimated value of 10.5% was found for pure convective drying of PHB in an RPFB with the same final moisture content.     

Drying of Mushroom Slices Using Hot Air Combined with an Electrohydrodynamic (EHD) Drying System

In this study, hot air combined with EHD drying is examined as an improved method for drying mushroom slices. The effects of three levels of voltage (17, 19, and 21 kV) and electrode gap (5, 6, and 7 cm) on the drying kinetics, time, effective water diffusion coefficient, and energy consumption of the EHD, pure hot air (provided within a chamber), and hot air combined with EHD drying systems were investigated. ANOVA showed that there were significant differences between EHD treatments and control (pure hot-air-drying treatment) for all of the investigated responses. Voltage and electrode gap factors had significant effects on all investigated responses. The results confirmed that the combination of EHD and hot air can significantly reduce the drying period, resulting in a greater effective water diffusion coefficient and drying rate and reduced energy consumption. As such, this technique offers a promising solution to the considerable energy consumption of the drying industry.     

Energy transfer in the photoluminescence of poly(3-thiophene acetic acid)-poly(vinyl alcohol) blends

We have investigated the optical properties of polymeric blend poly(3-thiophene acetic acid)-poly(vinyl alcohol). We have observed two band sets with different features in the photoluminescence spectrum. One set shows a band peak at 560 nm and the other shows two band peaks at 670 and 710 nm. We have analyzed the polarization and temperature dependence of photoluminescence spectrum. We have observed that the first set is unpolarized and shows weak temperature dependence, while the second one shows strong temperature dependence and a polarized band at 710 nm. These results were interpreted as evidence of energy transfer associated with migration and trapping of excitons in the poly(3-thiophene acetic acid) chains using a kinetic model with we estimated the energy of the trap site for the triplet exciton emissions.     

Separation of U(VI) and Th(IV) from Nd(III) by Cross-Current Solvent Extraction Mode Using Tri-iso-amyl Phosphate as the Extractant

Separation of U(VI) and Th(IV) from Nd(III) in nitric acid media with solutions of tri-iso-amyl phosphate (TiAP) in n-dodecane has been studied by batch extraction in cross-current mode to evaluate the feasibility of employing TiAP as an alternate extractant to tri-n-butyl phosphate (TBP) for monazite ore processing. The interference of U(VI), Th(IV), and Nd(III) in the presence of each other during their analyses by titrations has also been validated in the present study. The extraction studies substantiate that the high solvent loading conditions can be achieved without organic phase splitting in the extraction from concentrated feed solutions with TiAP based solvents, whereas TBP forms third phase under such conditions. The separation factor for Th(IV) with respect to Nd(III) can be improved with TiAP as the extractant and by carrying out the extraction with feed solution in 8 M HNO₃. Solvent extraction studies conducted with solutions of U(VI), Th(IV), and Nd(III) in nitric acid media by TBP and TiAP revealed the identical extraction, scrubbing, and stripping behavior of both the extractants with respect to U(VI), Th(IV), and Nd(III). The results insinuate that TiAP can be used as an alternate extractant to TBP for the separation of U(VI) and Th(IV) from monazite ores. The data generated in the present study can be exploited for the development of flow sheets using TiAP based solvents to separate U(VI) and Th(IV) from rare earths for the processing of monazite leach solutions.     

Separation of U(VI) and Pu(IV) from Am(III) and Trivalent Lanthanides with Tri-iso-amyl Phosphate (TiAP) as the Extractant by Using an Ejector Mixer-Settler

Counter-current solvent extraction runs have been carried out to develop a suitable flow sheet for fast reactor fuel reprocessing with 1.1M Tri-iso-amyl Phosphate (TiAP)/Heavy Normal Paraffin (HNP) as the solvent by using an ejector mixer-settler facility. A spent solvent of 1.1M TiAP/HNP used for earlier runs has been employed in the present study after the regeneration. Separation of U(VI) and Pu(IV) from Am(III) and lanthanides such as La(III), Pr(III), Nd(III), Sm(III), and Eu(III) as fission product representatives with the above solvent has been investigated with an optimized flow sheet. Stage profile data generated for the extraction and strip runs for the above separation have been reported. Overall and stage-wise mass balance data for the above runs are also discussed.     

Thermodynamic optimization of energy transfer in (bio)chemical reaction systems

The engineering science literature on energy-transfer processes (heat engines, heat pumps, etc.) for the production of mechanical energy, electricity, cold or heat has produced some remarkable results on maximum power and efficiency optimization. We have wondered in how far these results can be extended to include chemical reaction systems to describe living and possibly future-industrial energy-transfer systems. With elements of non-linear irreversible thermodynamics and chemical kinetics, we have arrived at some interesting results on optimizing the performance of chemical energy transfer. We discuss thermodynamic efficiency, energy-transfer rate, entropy-generation rate, and optimum-performance characteristics of (bio)chemical energy transfer.