关键词: 液硫输送管线, 保温设计, 保温材料, 保温结构, 热损失, 伴热

Abstract:

Higher thermal insulation requirements are proposed for long-distance liquid sulfur transport pipelines due to factors such as the transport medium and the environment etc.The insulation of the pipeline is optimized from the aspects of insulation material and insulation structure. The composite material of aluminum silicate and glass wool is selected, and the maximum use temperature of the material is at least 100 ℃ lower than that of relevant materials listed in GB 50264—2013 or relevant national standards. The energy-saving composite insulation pipe shell is adopted, and the modular design of pipeline construction and installation is carried out to improve the insulation effect. The heat transfer efficiency is improved by combining external heat tracing with heat conducting mastic of three heat tracing pipes. The liquid sulfur pipeline optimally designed has been running stably for more than two years after it was put into use. Compared with the external temperature of the ordinary jacket insulation, that of new pipe insulation is reduced by 8～12 ℃. The heat loss of the pipeline is reduced, and the expected thermal insulation effect is achieved.

Key words: liquid sulphur transport pipelines, insulation design, insulation materials, insulation structure, heat loss, heat tracing