换热器设计 大学论文.doc

.摘 要 此设计是在以安全为前提，在尽可能保证其质量、经济合理性和实用性等技术指标为前提下进行的设计。BR01型板式换热器是一种高效紧凑的换热设备，它被应用到食品工业、冶金工业、机电工业、造纸工业、石油工业等领域。而且其类型、结构和使用范围还在不断发展。焊接型板式换热器的紧凑性好，重量轻、传热性能好、初始成本低特点。 本文对板式换热器的发展及应用领域作了简要的介绍，通过应用板式换热器的传热机理。对板式换热器进行了热力计算和阻力计算，在满足了校核条件下，设计了板式换热器的基本结构如框架形式，板片结构及流程组合方式等结构参数。确定了板片数为149的并联式流程组合的板式换热器，用Auto CAD绘制零件图及总图。 关键字： 板式换热器；结构设计；热力计算；校核；经济性分析 Abstract The design is premise of security, in an mush an possible to ensure its quality, economically rational and practical technical indicators, such an under the premise of the design. Plate heat exchangers a compact and efficient heat transfer equipment, it is applied to the food industry, metallurgical industry, electromechanical industry, paper industry, oil industry and other fields. And its type, structure and scope are still evolving, Welded plate heat exchanger compactness has the features such as light weight, good heat transfer performance and low initial cost. In this paper, by the using of plate heat exchanger heat transfer mechanism the development of plate heat exchanger and applications are briefly introduced.It carried out the plate heat exchanger thermal calculation and resistance calculations, and designed the basic structure of the plate heat exchanger such as the frameworks, structure and processes combinations to meet the verification condition.Finally it determined the parallel flow plate heat exchanger with 149 of the plates and combined with Auto CAD drawing parts diagram and assembly drawings. Keywords: Plate heat exchanger; Configuration design; Thermodynamic calculation; Check; 目录 1. 绪 论 1 1.1 板式换热器的概述 1 1.2 我国设计制造应用情况 1 1.3 国外著名厂家及其产品 3 2. BR01型板式换热器的基本构造 6 2.1 BR01型板式换热器的基本构造 6 2.2 流程组合 6 2.3 框架型式 8 2.4板片 9 2.4.1 常用形式 9 2.4.2 混合人字板及性能 10 2.4.3 特种形式 12 2.5 密封圈 12 2.6 压紧装置 13 3. 板式换热器的性能特点 14 3.1 板式换热器的主要优点 14 3.2 板式换热器的主要缺点 16 3.3 板式换热器与管壳式换热器的比较 16 4. BR01型板式换热器的设计计算 18 4.1 板式换热器的设计计算概述 18 4.2 传热过程 18 4.2.1 对流换热 18 4.2.2 相变换热 19 4.2.3导热