电缆火灾的危害及其防治对策

简述电缆火灾的危害，分析电缆火灾的原因及特点，提出电缆火灾的防范措施和处理方法。     

自备发电站噪声综合控制

本文对自备发电站噪声污染综合控制进行了论述，拟出了有效控制措施。通过工程实例证明，自备发电站噪声污染扰民问题，能够得到有效的控制和解决。     

Synthesis of novel polymer type sulfoxide solid phase combined with the porogen imprinting for enabling selective separation of polychlorinated biphenyls

We developed a novel polymer type sulfoxide-modified solid phase enabling to achieve selective separation of polychlorinated biphenyls (PCBs) from insulation oil. In this study, firstly we prepared base-polymer based on the concept of the molecular imprinting to capture PCBs in selectively, then, the sulfoxide groups were modified on the pore surface of base-polymers by changing preparation methods. As results of liquid chromatographic analyses for the polymers as columns, the base-polymer prepared by xylene as a porogenic solvent showed selective retention ability for chlorinated aromatic compounds by the porogen imprinting effect. Additionally, the polymer-type sulfoxide solid phases showed highly retention ability for PCBs by increasing amount of introduced sulfoxide groups. Consequently, the results of separation of PCBs comparing to insulation oil suggested that the prepared solid phase can be used for the selective separation of PCBs at the same level as a commercially available media utilized for the regulated method.     

寒冷地区人工湿地污水处理技术研究进展

人工湿地作为我国新型的生态处理工艺,在寒冷地区的应用逐渐得到重视。本文总结了寒冷地区人工湿地的发展及应用情况,对湿地设计以及冬季保温措施进行了归纳与总结。     

配电箱在火灾环境下的热响应特性研究

对建筑中广泛使用的低压配电箱在实际火灾条件下的导热过程进行了分析,借鉴现有规范中对排烟风机的耐温要求,估算了配电箱在280℃时需要的隔热板厚度。在一腔室内利用火源功率为700kW的油池火模拟实际火灾环境,对普通配电箱和加隔热板配电箱箱体温升特性进行了研究,分析了火灾环境温度变化对配电箱箱体、内部温度变化的影响规律,验证了配电箱保持连续工作30min的耐火设计要求。     

高压开关柜阻燃绝缘件在役老化诱发着火事故的综合分析

高压开关柜长期连续运行在高温高湿环境下,内部的阻燃绝缘件会老化而导致性能劣化,进而引起电弧击穿乃至着火事故。为揭示绝缘件样品老化对其击穿与引燃特性的影响机制,针对已在役运行12年开关柜内老化阻燃固封极柱样品和同配方新样品,开展了微观形貌、热重-差示扫描量热、热重-红外光谱和微量燃烧特性综合分析。结果表明:开关柜内的长期电热应力易使环氧树脂绝缘材料的微观结构产生破坏,内部易产生孔洞和裂纹,导致其绝缘性能下降;开关柜内的高温环境易使绝缘材料内部分子链缓慢断裂,导致老化样品更易受热分解;同时,柜内高温高湿环境既可使其材料内部孔隙吸湿而降低绝缘性能,还易导致磷系阻燃剂吸潮氧化,降低其阻燃性能;最后,与新样品相比,12年老化样品在升温初期的燃烧释热更高,一旦形成击穿电弧,更易着火燃烧。研究结果为高压开关柜因绝缘件老化失效而形成击穿起火事故提供了分析要点,并可作为未来更高性能阻燃绝缘件的优化设计依据。     

罗茨鼓风机的噪声治理

针对罗茨鼓风机的噪声特性,采用“负压冷却隔声间”隔声,并设计出重型隔声墙板以适应低频隔声的要求。     

Self-ignition in stone wool insulation contaminated with fatty acid (fundamentals,case study,analysis methodology)

A combination of a residual film of flammable organic substance, air and porous structures like insulation material (e.g. stone wool) may result in a fire. The initiating self-heating process depends on the substance (reactivity, volatility), amount of accumulated liquid, volume and temperature. Specific information is given for application and extension of the Thomas criterion with a 2nd order reaction. The experimental part includes new experimental techniques to determine heat transfer and formal reaction kinetic data. The applied self-ignition temperature (SIT) simulation model relies on liquid film volume and not on liquid film surface reaction. As a further result of the studies detailed working procedure of three simplified methodologies for estimation of SITs in technical scale are presented. New techniques to determine parameters necessary for SIT prediction, especially in combination with Methodology III, have the power to reduce the costs for estimating the SIT up to 80%.     

Assessment of the seismic effect of insulation on extra-large cryogenic liquid natural gas storage tanks

Insulation is typically used in extra-large double-walled cryogenic storage tanks that are used to store liquid natural gas (LNG). These vessels have been designed with the assumption that the insulation offers negligible structural resistance that might cause structural damage. Observation of the deformation of the insulation in such tanks leads to concern that the insulation may become sufficiently compacted to cause significant load transfer between the inner and outer tank. The inner tank, though protected from most external events by the outer tank, is only designed to contain the liquid gas. It is therefore much more sensitive to seismic effects. In this investigation, simplified and 3D finite element models are used to simulate the interaction effects of the fluid, inner tank, insulation and outer tank. This paper presents an initial analysis of the potential effects of LNG tank insulation under earthquake conditions and assesses the potential for structural damage by comparison of models that do or do not consider the insulation layer. The data reported and statistically sorted include the overturning moment, the base shear, the tank wall stress, and the wave height in the tank. The results show that the insulation layer has certain influence on seismic design of LNG tanks.     

ZR-BV阻燃电缆绝缘材料热老化寿命研究

利用热分析技术，在实验的基础上对阻燃绝缘材料热老化寿命进行了研究．推算出了电缆热老化寿命快速评定法的计算公式，对不同载流情况下电缆绝缘材料热老化寿命进行了比较，并对电缆热老化程度进行了分析。