论文部分内容阅读
卧式锅壳式锅炉的高温端管板在运行中产生裂纹的问题,七十年代中期就有发现。当时主要在KZL和WNL两种型号的蒸汽锅炉上发生,但事故率不算高,约2%左右。由于裂纹影响锅炉的安全运行,所以立即引起了锅炉安全监察部门的关注。为此,制造厂组织了专门力量,对裂纹产生的现象、特征和性质进行了调查、分析和判断。并在此基础上提出了一些改进措施。实践证明,这些措施在降低裂纹的发生率上收到了一定的效果,有的措施还受到劳动部和《锅壳式锅炉受压元件强度计算标准》(J83622—84)编制者的重视,被吸收为标准条文。随着新标准的发布实施,锅壳式蒸汽锅炉管板裂纹的发生已有了较大改善。近年来,随着锅壳式热水锅炉的生产和运行,管板
The problem of cracking in the operation of the horizontal shell-and-tube boiler tubes in the mid-1970s was discovered in the mid-1970s. At that time, mainly in KZL and WNL two types of steam boilers occurred, but the accident rate is not high, about 2%. As cracks affect the safe operation of the boiler, it immediately aroused the concern of the boiler safety supervision department. For this reason, the manufacturer has organized special forces to investigate, analyze and judge the phenomena, characteristics and nature of the cracks. Based on this, some improvement measures are put forward. Practice has proved that these measures to reduce the incidence of cracks have received some results, and some measures also by the Ministry of Labor and the “shell of the boiler pressure element strength calculation standard” (J83622-84) compiler attention, was absorbed As the standard provisions. With the release of new standards, the occurrence of cracks in the shell plate of steam boiler shell has been greatly improved. In recent years, along with the production and operation of boiler-type hot water boilers, tube sheets