石化系统热力管道保温结构的优选及设计毕业论文
2022-07-10 19:47:10
论文总字数:28119字
摘 要
热力管道是用来输送热媒的管道,用来携带、输送、传递热能的介质是热媒,工程上热力管道通常指输送热水、蒸汽的管道。在复杂而庞大的石化系统中,热力管道是重要的输送网络。在输送过程中,由于热介质的温度过高,与周围温度的温差过大,所以在这一过程中会损失掉部分热能,这些热能都是通过管网表面散失在空气中,难以回收利用,所以只能靠各种热力管网的隔热、保温措施来尽量降低热损失,由此可见,热力管网的保温措施是十分必要且重要的。一些大型企业的热力管道,相对小型企业而言,它的输送长度是小企业的几倍,有的高达数10Km。长距离输送,不得不考虑一个问题:资源耗损。企业能源耗损和经济发展之间紧密联系,资源被安全的运输出去,资源不被损耗,企业的经济效益将被提高。企业开展热力管道输送能源事业,主要是为了企业能够盈利,为了提高社会经济效益。为了节约能源以及保证生产工艺的要求,需要在热力管道外表面施加保温结构,防止热量的流失。
目前,我国使用的保温材料种类已有20多种,年消耗保温材料总量近500万立方米。但在热力管网的实际保温工程中,仍存在保温材料选择不当,致使保温节能效果得不到充分发挥。因而,合理选择保温材料是目前保温节能工作中的一项重要问题。
关键词: 热力管道 保温结构 优选
Optimization and design of structure of the thermal pipe insulation petrochemical system
Abstract
Heat pipe is used for pipeline heat medium, used to carry, transport, heat transfer medium heat. Heat pipe engineering usually refers to the pipeline conveying hot water, steam. In the complex and huge system in petrochemical, pipeline transportation network is the important. In the transportation process, because the heat medium temperature is too high,,and temperature difference between ambient temperature is too high, so the loss of heat in this process,the heat is lost through the pipe surface in the air, is difficult to recycle, so can only rely on the heat insulation, all kinds of thermal pipe insulation measures to minimize heat thus, loss, insulation measures heat pipe network is very necessary and important. Heat some large enterprises, relatively small businesses, conveying its length is several times the small enterprises, some as high as the number of 10Km. Long distance transportation, have to consider a problem: resource consumption. The close relationship between enterprises in the energy consumption and economic development, resource is shipped out safe, resources are not loss, the economic efficiency of enterprises will be improved. Enterprises to carry out thermal pipeline transportation energy business, is mainly for the enterprises to profit, in order to improve the social and economic benefits. In order to save energy and ensure the production process requirements, need in the heat pipe outer surface applied insulation structure, prevent heat loss.
Key words: Heating pipeline Thermal insulation structure Selective preference
目录
摘要 I
Abstract II
第一章绪论 1
1.1管道保温技术发展与现状 1
1.2管道保温研究背景 2
1.3管道保温研究意义 3
1.4 保温层下腐蚀 4
1.4.1 保温层下腐蚀的电化学历程 4
1.4.2易发生保温层下腐蚀的情形 5
第二章 保温材料的种类和选择原则 7
2.1 保温材料的分类 7
2.2对保温材料的要求 8
2.3保温层材料的选择 9
2.3.1工业设备和管道保温层材料的要求 9
2.3.2高温管道和设备保温层各结构材料优选 10
2.4 常用保温材料的主要性能及价格 15
2.5室外架空热力管道保温比较 15
2.6结论 16
第三章 热力管道所用的保温层结构 17
3.1 对保温结构的要求 17
3.2管道的保温结构 17
3.3 管道附件的保温结构 22
3.3.1 法兰保温结构 22
3.3.2阀门保温结构 23
3.3.3 弯管保温 24
3.4管道膨胀缝和膨胀间隙 24
3.5 保护层 25
3.6 本章小结 26
第四章 热力管道及其保温层设计方法 27
4.1热力管道及其保温层设计方法浅析 27
4.2热力管道的热经济分析 27
4.3最佳管径和最佳保温层厚度计算 29
4.4计算实例与结果分析 30
4.5 结论 33
第五章 结论与展望 34
5.1 结论 34
5.2 展望 34
参考文献 35
致谢 37
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