某型锅炉风帽锥体压制工艺改进

本文针对CPC75 t/h循环流化床锅炉中风帽锥体化压制工艺,将原来的分瓣压制改进为整体压制工艺,解决了分瓣压制工艺存在的问题,为CPC的循环流化床锅炉的先进技术在我国的推广打下的良好基础。     

两种液压位置控制技术的分析与对比

以宝钢三热轧1880mm主轧线典型设备为例,对两种液压位置控制方式——电磁阀控制方式、电液伺服控制方式进行分析与对比,重点阐述了两者位置控制的基本原理(前者主要采用CPC模块进行控制,后者主要采用APC模块进行控制),从中总结出各自的优势及劣势,并针对现场出现的问题提出改进设想和建议。     

CPC内聚光式热管集热管温度特性研究

为提高太阳能热水系统的输出温度,将CPC聚光技术应用于热管式真空集热管中,开发了一种新型的CPC内聚光式热管集热管。对该集热管建立数学模型,模拟计算其传热过程,获得了导热肋片温度、热管冷凝段温度等参数随太阳辐射强度的变化规律,并通过试验验证了数学模型的可靠性;与常规热管式真空管集热管传热特性相对比,证实了该集热管可大幅提高太阳能热水器输出温度。     

Roll performance – technical overview and future outlook

Abstract

An overview is given of roll developments and experience in the context of hot mills and flat rolled products. After 30 years of slow change, there are now strong productivity and quality incentives driving developments in roll technology. International developments are noted, in particular the acceptance that high speed steel (HSS) rolls must be used to meet current surface finish requirements. The most significant need at present is for an improvement of late stand work rolls.     

探究冷轧带钢中存在的问题

介绍了纠偏设备的工作原理,分析了冷轧厂轧制线上,带钢纠偏设备本体缺陷产生的原因、种类和调整要求。     

Performance evaluation of three optical particle counters with an efficient “multimodal” calibration method

The sizing accuracies of two widely used yet hitherto unevaluated optical particle counters (OPCs—Grimm Model 1.109 and Palas Model WELAS 2100) as well as one high-resolution, non-commercial OPC were evaluated. The measured data were compared to scattering intensity calculations based on Mie theory. Additionally, the counting efficiency for all three counters was measured, as was the influence of coincidence effects for the OPC with the lowest (manufacturer specified) upper concentration limit.Beside the traditional polystyrene latex calibration, a little-known, very fast and precise “multimodal” calibration method was used, which is based on the simultaneous generation of up to eight sharp multiple-charge modes from polydisperse di-ethyl-hexyl-sebacate (DEHS) particles by electrical mobility classification.     

四辊平整机高速断带电气分析与应用

针对冷轧四辊平整机高速断带故障,从电气方面分析原因并提出解决此故障的方案并加以实施,减少故障率,保证生产的顺畅。     

中国共产党党组的自主性问题研究

中国共产党党组（简称中共党组）作为中国共产党（简称中共）组织体系中的一种次级组织,是实现党对国家政权（或其他非党组织）领导的重要制度安排。从组织间领导关系看,中共党组从属于产生它的党组织。从实际功能发挥看,中共党组具有自主性。从党内文献看,对中共党组从属性的强调是一以贯之的,对中共党组自主性的研究则较为薄弱。本文依据中共党组在政治实践中的表现探讨中共党组的自主性问题,以深化对中共党组制度的研究。     

Chitosan—A versatile semi-synthetic polymer in biomedical applications

This review outlines the new developments on chitosan-based bioapplications. Over the last decade, functional biomaterials research has developed new drug delivery systems and improved scaffolds for regenerative medicine that is currently one of the most rapidly growing fields in the life sciences. The aim is to restore or replace damaged body parts or lost organs by transplanting supportive scaffolds with appropriate cells that in combination with biomolecules generate new tissue. This is a highly interdisciplinary field that encompasses polymer synthesis and modification, cell culturing, gene therapy, stem cell research, therapeutic cloning and tissue engineering. In this regard, chitosan, as a biopolymer derived macromolecular compound, has a major involvement. Chitosan is a polyelectrolyte with reactive functional groups, gel-forming capability, high adsorption capacity and biodegradability. In addition, it is innately biocompatible and non-toxic to living tissues as well as having antibacterial, antifungal and antitumor activity. These features highlight the suitability and extensive applications that chitosan has in medicine. Micro/nanoparticles and hydrogels are widely used in the design of chitosan-based therapeuticsystems. The chemical structure and relevant biological properties of chitosan for regenerative medicine have been summarized as well as the methods for the preparation of controlled drug release devices and their applications.     

CPC改性膨润土的制备及其对2,4-二氯苯酚的吸附性能

采用阳离子表面活性剂氯代十六烷基吡啶（CPC）对天然膨润土进行改性。通过IR光谱和X射线衍射分析手段对制备的CPC改性膨润土进行了结构表征。同时以CPC改性膨润土为吸附剂,研究了对含2, 4-二氯苯酚废水的去除效果,并确定了最佳的吸附时间,温度、吸附剂用量和溶液pH。研究表明CPC改性膨润土吸附水中2, 4-二氯苯酚时, 同时具有表面吸附和分配作用, 对酚类污染物的去除作用明显。