稀盐酸储槽抽裂事故的分析

分析了盐酸脱吸工序中稀盐酸储槽抽裂事故产生的原因；通过稀盐酸储槽的压力式液位计DCS历史曲线记录来间接分析稀盐酸储槽内压力变化情况，剖析负压的形成过程。结果表明：脱吸塔产生较大的负压是因为系统急停、温度下降后在略低于盐酸溶液恒沸点时发生冷凝相变而引起的。     

GEOMETRIC PROGRAMMING. A NEW HYBRID ALGORITHM BASED ON LIAPUNOV CONCEPTS (MADLAP)

This article concerns the development of a simple yet very efficient heuristic procedure for optimizing the design or a reactor system employing continuous stirred tanks in series using Michaelis-Menten kinetics. The heuristic procedure employs a modified form or the well known Golden Search method to estimate the optimal number of reactors to be employed. The procedure was tested on an IBM personal computer under a wide range of values for three model parameters, namely the economy or scale factor, the scaled Michaelis-Menten constant and the desired degree of conversion to be attained. The results of this study indicated that the heuristic optimization procedure is capable of obtaining solutions that are either identical or very close to the actual optimal solutions in a very efficient manner.     

同步整流双谐振LLC-DCX悬浮控制电源研究

针对传统悬浮控制电源设计中存在的占空比失调、稳压率差及转换效率低等问题,提出基于同步整流双谐振LLC-DCX的两级式变换方案。该方案在实现主次侧开关管ZVS和二次侧整流管低损耗的同时,降低了输入电流纹波;在介绍了双谐振LLC-DCX的工作原理的基础上,讨论了电源的关键参数设计。210W,220-380V输入、4路输出的原理样机实验结果及比较很好地验证了研究方案的先进性与可行性。     

新型阶梯式浅吃水单立柱浮式风机平台水动力分析

常规的单立柱式(Spar)风力发电机平台,在水深较浅区域工作时,结构本身受吃水限制,工作效果较差。常规Spar重心较低,具有良好的稳定性,但是由于它往往具有超过100 m的吃水,因此使其不能应用于中近海域(水深小于100 m)。可设计研究一种适用于中国东海不超过100 m水深的中近海域新型浮式风机平台以解决此问题。针对NREL 5MW风机能应用于100 m水深的情况,对50 m吃水的新型Spar(SJTU-S4)及其系泊系统进行了概念设计研究。利用商业软件建立水动力模型,进行数值仿真,同时设计缩比模型试验,在上海交通大学海洋工程国家重点实验室(SKLOE)进行水动力性能测试。结果表明,本文研究的新阶梯式浅吃水单立柱浮式风机平台在100 m水深、多种海洋波浪环境下,通过试验和仿真验证,能够具有良好的运动响应,为风机提供较好的工作条件。     

Experimental validation of predictor-corrector approach based control schemes on the laboratory scale non-linear system

In this work, the authors have designed and implemented predictor-corrector approach based control schemes for a single input-single output nonlinear system. The controller output is computed in two steps. The first step explicitly uses a non-linear model or multiple-linear models weighted using fuzzy membership function to compute the value of the controller output. The second step is based on the measurement, where the value of the controller output computed in first step is updated. The extensive simulation studies show that the set-point tracking and disturbance rejection capability of the proposed control schemes are found to be satisfactory in the absence and presence of Model-plant mismatch. The performances of the proposed control schemes have been compared with that of a gain-scheduled PI controller. In addition, the control schemes are experimentally validated on the laboratory scale conical tank experimental setup.     

搪瓷承压水箱在空气源热泵中实际运用研究

随着经济的快速发展，人们的生活水平得到了显著的提升，由此，人们对生活的质量就有了更高的要求，尤其是对热水的要求，更是出现了显著的提升。当前，国内的空气源热水器行业发展的十分迅速，能够充分地满足人们对热水的需求，这使得空气源热泵在人们的生活中应用的越来越广泛。在本文中，介绍了空气源热泵的工作原理以及优点，并介绍了搪瓷承压水箱在空气源热泵中的实际应用。     

脱硝还原剂尿素法改造常见问题及优化探讨

近几年,脱硝还原剂尿素法改造常见于火电厂,这是为了消除液氨这一危险源。但在改造设计中,有些具体问题容易被设计人员忽视。以L公司为例,尿素制氨系统运行2 a多来,暴露出了卸料管振动大、溶解罐溢流管出气泡、疏水箱振动大、疏水母管无法隔离、气相阀门腐蚀内漏、水解器排污时间定值不合理等一系列问题。经过L公司技术人员的努力,现已对部分问题进行了优化,经过运行,检验效果良好。     

现代镀覆技术 第二部分──化学镀镍(续4)

给出了各种实用的化学镀镍配方及其工艺条件。     

Corrosion Behavior of Welded Joints for Cargo Oil Tanks of Crude Oil Carrier

E32 grade corrosion resistant steel was welded with welding wires with three different S contents.The mi-crostructure,mechanical properties,inclusions,and corrosion behavior of welded joint were investigated.The joint coupon corrosion test and potentiodynamic polarization test were carried out under the simulated corrosion environ-ment of the inner bottom plates of cargo oil tanks.The pitting initiation and propagation mechanism of the weld metal were studied by scanning electron microscopy and infinite focus.The results indicated that the microstructures of three kinds of weld metals are all composed of acicular ferrite,ferrite side-plate and proeutectoid ferrite.The micro-structure of heat-affected zone is composed predominantly of bainite.Joint welded with low S filler wire has good me-chanical properties.S can decrease free corrosion potential and increase the corrosion tendency.The pitting initiation is oxide inclusion or sulfide-oxide inclusion complex.S can induce the formation of occluded area and promote the corrosion propagation.The chemical compositions of weld metal is similar to base metal,which can limit the galvanic corrosion between weld metal and base metal,and avoid formation of corrosion step.