交联聚乙烯高压直流电缆绝缘材料中试生产线及工艺优化

发布时间：2018-04-02 17:29

本文选题：双螺杆挤出机　切入点：超净绝缘材料　出处：《哈尔滨理工大学》2014年硕士论文

【摘要】：我国经济正处于飞速发展中，电力输送在国民经济中占有很重要的位置。高压直流电缆的绝缘材料性能一直是制约电力行业发展的主要因素之一。尽管经大量研究人员的长期努力，突破了很多技术难点并解决了一些关键问题，但当前高压直流交联聚乙烯电缆绝缘材料的综合性能与行业预期仍有很大差距。国内相关厂家较多，但很少能够生产出与外国制造商相竞争的高质量产品。目前只有北欧化工公司通过有机化学改性方法研制出的交联聚乙烯高压直流电缆绝缘材料实现了产业化和大规模应用，基本垄断了市场和价格。因此，研制高性能的高压直流电缆交联聚乙烯绝缘材料是一项十分重要的热点课题。本文基于高电压等级直流电缆的制备特点，研究和总结了适合工业化生产的制备方法。文章利用过氧化物的交联方式，以加入纳米添加剂的方法对交联聚乙烯进行改善。比较了国内几家化工原料厂，找到了适合用于生产绝缘材料的基料以及几种主要的添加剂，，合理选择了工艺配方。实验中选用的生产设备完全实现了国产化，对双螺杆挤出机、熔体泵、过滤系统以及水下切粒系统进行了详细分析，同时对熔体过滤、水下切粒等疑难问题做了大量摸索研究和部分创新。采用的具有高灵敏度的失重式电子称严格控制了生产能力。经过对生产过程中技术的总结给出了规范的工艺控制范围，能够通过对设备压力、温度以及螺杆转速之间的配合得到最大限度的产量。通过对力学性能、击穿场强、电导电流、空间电荷分布和微观结构等结果的分析，所得制品均符合行业标准。本文的研究工作为实现高效率、高产量、高质量、低浪费的工业化生产提供了一定的依据。
[Abstract]:China's economy is in rapid development, power transmission in the national economy occupies a very important position. The insulation material performance of HVDC cables has been one of the main factors restricting the development of the power industry. Although the long-term efforts of a number of researchers, breakthrough many technical difficulties and solve some key problems, but the overall performance and the industry's current high voltage DC XLPE cable insulation material is expected to have a big gap. Many domestic manufacturers, but rarely able to produce high quality products to compete with foreign manufacturers. The material to achieve the industrialization and large-scale application of XLPE cable DC currently only North European chemical company through organic chemical modification methods developed insulation, basically monopolize the market and price. Therefore, XLPE cable DC high performance insulation materials is a A very important hot topic.
In this paper, based on high voltage DC cable preparation, research and summarize the preparation method is suitable for industrialized production. The peroxide crosslinking method, the cross-linked polyethylene by improved method of adding nano additives. Comparison of several domestic chemical raw materials factory, to find suitable for the production of insulating material base material and several major the reasonable choice of additive formulation process. The production equipment fully realized the localization of twin screw extruder and melt pump, to conduct a detailed analysis of pelletizing system and water filtration system, at the same time of melt filtration, done a lot of research and exploration part of innovation problems under water pelletizing because of the high sensitivity of the strict control of the weight loss type electronic scale production capacity.
After a summary is given for the technology in the production process of the standardized process control, to the device through the pressure fit between temperature and screw speed to maximize yield. Based on the mechanical properties, breakdown strength, conduction current, space charge distribution and micro structure analysis of the results, the products are in line with industry standards the research work of this paper. In order to achieve high efficiency, high yield, high quality, provides a basis for the industrial production of low waste.

【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM21

【共引文献】