山东科学 ›› 2025, Vol. 38 ›› Issue (1): 74-82.doi: 10.3976/j.issn.1002-4026.20240063

• 能源与动力 • 上一篇    下一篇

蒸汽管道保温层性能恶化对其经济性的影响

曹凯(), 鲍文龙(), 赵坤, 姜浩涌, 殷兴磊   

  1. 山东中烟工业有限责任公司青岛卷烟厂,山东 青岛 266100
  • 收稿日期:2024-04-18 出版日期:2025-02-20 发布日期:2025-01-21
  • 通信作者: 鲍文龙(1995—),男,博士,工程师,研究方向为热能工程。Tel:15621181185,E-mail:b_w_long@126.com
  • 作者简介:曹凯(1989—),男,硕士,工程师,研究方向为能源管理。E-mail:550901873@qq.com
  • 基金资助:
    山东中烟重大科技项目(620000082)

Effect of thermal insulation performance deterioration on the economy of steam pipelines

CAO Kai(), BAO Wenlong(), ZHAO Kun, JIANG Haoyong, YIN Xinglei   

  1. China Tobacco Shandong Industrial Co., Ltd, Qingdao 266100, China
  • Received:2024-04-18 Online:2025-02-20 Published:2025-01-21

摘要:

目前卷烟厂蒸汽管线具有点多、线长、面广的特点,热力折合系数较高,蒸汽能耗占总体能耗比重较大,对蒸汽管道保温层性能开展研究对提升蒸汽使用效率、减少蒸汽管网热损失意义重大。以4种保温材料为例,基于稳态法测量不同温度下的保温层热导率,明确保温材料热导率与蒸汽温度间的关系,确定了适合应用场景的高效保温材料。通过最大允许热损失方法及经济厚度法确定了合适的保温层厚度,并对不同使用年限的保温层热导率进行测量,随保温层使用年限增加,其热导率呈线性增加趋势。将保温层性能恶化因素纳入模型中,研究了保温层运行费用与其外径及使用年数的关系。针对不同设计使用寿命的保温层,基于经济厚度法计算最优外径及运行费用,结果表明:将材料老化因素考虑在内设计保温层厚度,在设计使用年限内,其累计费用减少10.7%,当超出设计使用年限后,由于保温层老化,散热损失费用增加,考虑材料老化的运行费用高于未考虑材料老化时的费用。通过保温层设计,降低蒸汽散热损失,提升蒸汽利用率,为卷烟厂绿色低碳高质量发展提供理论指导。

关键词: 保温层, 热导率, 最大允许热损失法, 经济厚度法, 性能恶化

Abstract:

Currently, the steam pipelines in cigarette factories are characterized by numerous points, extensive lengths, and broad coverage. The thermal conversion factor of these pipelines is high, and their steam energy consumption accounts for a large proportion of the total energy consumption. Therefore, investigating the performance of the insulation layer of steam pipes is of considerable importance for improving steam utilization efficiency and reducing heat loss in the steam pipe network. In this study, the thermal conductivities of insulation layers made of four insulation materials were measured using the steady-state method at different temperatures to elucidate the relationship between the thermal conductivity of an insulation material and the steam temperature, thereby identifying the efficient insulation materials suitable for application scenarios. The appropriate insulation layer thickness was determined using the maximum allowable heat loss method and economic thickness method. Moreover, the thermal conductivities of insulation layers with different service lives were measured. Results indicate that the thermal conductivity increased linearly with the increasing service life. Factors causing the deterioration of insulation layer performance were incorporated into the model to study the relationship between the operating cost of an insulation layer and its outer diameter and service life. For insulation layers with different designed service lives, their optimal outer diameters and operating costs were calculated using the economic thickness method. Results show that considering material aging factors in the design of insulation layer thickness can reduce cumulative costs by 10.7% within the designed service life. However, when the service life expires, the operating cost of a design that considered the aging issue is higher than that of a design that did not consider the aging issue owing to increased heat loss as a result of aging of the insulation layer. The insulation layer can be designed to reduce steam heat loss and improve steam utilization efficiency as well as provide theoretical guidance for the green, low-carbon, and high-quality development of cigarette factories.

Key words: thermal insulation, thermal conductivity, maximum allowable heat loss method, economic thickness method, performance deterioration

中图分类号: 

  • TK124

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