催化裂化烟气海水洗涤的脱硫工艺

测定了海水-二氧化硫体系的相平衡数据，并对数据中化学吸收及物理吸收所占比例作了分析。应用相平衡数据和有关公式，对某渣油催化裂化烟气二氧化硫浓度1000ppm，按去除率90％计算，设计了填料吸收塔及有关参数。吸收实验既验证了设计结果，又发现了填料层高度、液气比和操作气速等参数变化对二氧化硫去除率的影响规律。     

催化裂化装置再生器旋风分离器的合理选择

通过对烟机人口催化剂含量限制、催化裂化装置催化剂单耗以及颗粒物最高允许排放浓度、颗粒物最高允许排放速率等诸参数的分析和计算，得到了合理选择和设计旋风分离器的控制因素及依据。     

新型催化裂化槽式待生剂分配器的冷模实验

针对大型催化裂化再生强化的需要,本研究提出了一种新型的槽式待生剂分配器,在大型冷模实验装置上对其性能进行了系统的评价,并考察了不同操作条件和结构参数对主要性能指标的影响规律,最后和前期研究的两种传统分配器进行了性能对比。结果发现该型分配器只需操作气速大于临界表观气速即可达到得很高的颗粒分配均匀性和颗粒输送能力,而其他因素对其性能影响不大。考虑到工业圆形再生器的实际情况,提出了一个修正的不均匀指数,可以更好地满足工业待生剂分配器设计的需要。和传统船型和管式分配器的性能对比发现,新型槽式待生剂分配器不仅具有更好的颗粒分配均匀性,而且在颗粒输送能力和操作弹性两方面也具有显著的优势,其更本原因在于它更好地解决了分配器内颗粒的流动性问题。     

热声制冷机回热器的现状及展望

概括介绍了目前热声热机常用热声研究理论及常见类型的热声回热器。重点综述了目前常用回热器研究理论及实验研究进展,针对不同种类回热器进行简单分析对比。基于热声回热器发展的现状对回热器今后研究发展趋势进行了展望。     

复叠系统壳管式回热器的设计研究

回热器是复叠系统中的重要附属换热器,本文采用专业传热计算软件从流道布置方式、管程数等方面对影响回热器换热系数的因素进行研究,阐明壳管式回热器适宜的结构型式。     

玻璃熔窑蓄热室腔道设计的改进

对全分隔式、全连通式和组合连通式3种不同类型蓄热室腔道的构造特点及其优缺点进行了剖析。用实例对蓄热室腔道常规分隔做法的缺点进行了分析,提出了采用＂横向分隔墙微调错位＂法改进蓄热室腔道设计的具体措施。     

催化裂化再生器外取热器换热过程理论分析

从热量来源 (不从传热 )角度在理论上对目前催化裂化再生器各种外取热器作了分析 ,给出了对流热和“扩散热”的计算式。研究了各种外取热器的换热效率及计算方法 ,并找出了取热器内温度明显低于再生温度 (即使在入口处也如此 )的原因 ,进而提出了改进措施。研究结果表明 ,取热器本体内传热基本上受“扩散”控制 ;催化剂循环对取热器的作用主要归于对供剂起始温度的影响 ;用流化气体使供剂管路内催化剂扩散可提高取热量 ;各种外取热器的性能差别主要表现在供剂温度上 ;供剂管路的设计和操作状态 ,对取热器内温度可产生达 10 0℃的改变 ,从而影响取热器的负荷。     

重油催化裂化装置再生器改造开大型作业孔引出问题的探讨

对140万t／a重油催化裂化装置利用UOP技术进行技术改造施工过程中在再生器危险段器壁开大型作业孔引出的问题进行技术探讨，通过计算论证了再生器器壁开大孔作业的可行性。     

Design and manufacturing of travelling wave thermo-acoustic engine with varying regenerator length

ABSTRACT

Thermo-acoustic engines are devices suitable to convert heat energy into acoustic energy and vice versa. In this paper, travelling wave thermo-acoustic engine was designed and fabricated for the operating conditions of 30?bar mean pressure of working fluid (Air, Helium, Hydrogen, Nitrogen) and 500°C hot side temperature. The regenerator was made up of the can(s) of stainless steel SA-347and can be adjusted to achieve the required length. The access to change wire mesh size and its length enables to reduce the test set-up time and to enhance flexibility during experimentation. The modified secondary cold heat exchanger was developed for effective heat extraction from the working fluid and the effect of modified regenerator on the intensity of the thermo-acoustic power was also addressed. The present study shares the suitable alternatives for material selection, design considerations and preliminary estimation of heat exchangers at the operating temperature and pressure. It provides initial dimensions and enables to make a prototype.     

Magnetic refrigeration: a promising new technology for energy saving

Magnetic refrigeration is an emerging, environment-friendly technology based on a magnetic solid that acts as a refrigerant by magnetocaloric effect. The reference cycle for magnetic refrigeration is AMR (Active Magnetic Regenerative refrigeration). In this paper, attention is directed towards the near-room-temperature range. We compare the energetic performance of a commercial R134a refrigeration plant to that of a magnetic refrigerator working with an AMR cycle. The comparison is carried out by means of a mathematical model. In these simulations, we consider different solid magnetic refrigerants, namely, Gd, Gd_0.95Dy_0.05, Gd_0.9Tb_0.1,Gd₅Si₂Ge₂, MnAs_0.9Sb_0.1, and MnAs_0.95Sb_0.05. We compared two different geometries of the regenerator: a porous medium and a flat plate. In the former, the Coefficient of Performance (COP) of the AMR cycle is better than that of the vapour compression plant only in the low mass flow-rate range. Whereas in a flat plate regenerator, the COP of the AMR cycle is better than that of the vapour compression plant only in the high mass flow-rate range.