关于螺旋板式换热器的结垢问题处理

螺旋板式换热器是换热器的一种。在焦化厂粗苯生产中多处使用到了螺旋板式换热器。但螺旋板式换热器结垢导致换热效果不佳成为影响生产的重要问题。因此,有效的阻止结垢成为生产的关键。     

一种新型换热器——板壳式换热器

目前食品工业中最常用的换热器是列管式换热器和板式换热器。板式换热器与列管式换热器相比最突出的优点是结构紧凑,传热系数高,然而它     

试论用板式换热器作氯化钾效间预热器的节能效果

介绍了板式换热器的结构、特点，通过用列管式换热器与用板式换热器作氯化钾效间预热器的吨钾耗煤量对比，论述板式换热器的节能效果。     

制溴母液余热利用换热器的选型与计算

本文通过对列管式换热器与板式换热器的优缺点对比，两种换热器各参数的计算，得出了利用板式换热器要优于使用列管式换热器，并通过实际运用得出了采用板式换器能有效降低设备投资。     

试论用板式换热器作氯化钾效间预热器的节能效果

介绍了板式换热器的结构、特点，通过用列管式换热器与用板式换热器作氯化钾效间预热器的吨钾耗煤量对比，论述板式换热器的节能效果。     

板式换热器在食品工业中的应用特点及维护

板式换热器在食品工业中有着广泛应用.本文在充分考虑食品工业生产特点的基础上,简述了如何合理选用和维护板式换热设备,正确选定操作条件,不断改进生产工艺,以保证良好的产品品质.     

板式与管壳式换热器的比较分析

分析了管壳式换热器和板式换热器的结构、工艺性能、并通过比较认为板式换热器的换热工艺性能明显优于管壳式换热器,在油厂有较广阔的应用前景。     

焊接式板式换热器带管板片的研制

为更加直观的分析焊接式板式换热器的换热效果并提高其换热效率,研制了一种焊接式板式换热器带管板片。带管板片在焊接式板式换热器中应用后,可协助测量换热器在换热过程中板间流道的温度分布情况和介质的相关数据,通过对测量数据的分析,以期达到优化产品流程组合形式,为合理选择换热方案起指导作用。     

LiCl溶液除湿机组用板式换热器的选择及其试验研究

基于板式换热器的设计过程,阐述LiCl溶液除湿机用板式换热器的选择方法,并通过试验研究所选换热器实际换热量与设计值的关系。试验结果表明,选择的钛合金板式换热器满足设计需要,且对溶液除湿机的工况运行是有利的。     

热网换热器型式的选择

文章介绍了火力发电厂热网换热器型式（管式换热器和板式换热器）的选择,分析了管式换热器和板式换热器的构造、材质及特点等,并提出一些建议,以降低企业生产成本,增加企业利润的目的。     

印染厂节能减排实用工艺装备技术(三)——染整生产排出污水的热回收

染整生产过程产生的热污水若直接排放,会浪费大量热能,可采用水/水热交换器进行热回收.热污水中的杂质有化学杂质、萃取物、沉淀物和机械性杂质等4类,应及时去除,以免影响热交换器效率.实践证明,一条1 800印染生产线采用自洁式转鼓水/水热交换器,全年从热污水中回收的热量约为0.2 MPa蒸汽6300～9000 t.     

FOULING MODELS FOR HEAT EXCHANGERS IN DAIRY PROCESSING: A REVIEW

Fouling is a common food industry‐wide issue during thermal treatment using heat exchangers. It directly contributes toward increased energy costs in operation and maintenance, production losses and energy and water losses because of the repetitive cleaning operation, i.e., every 5–10 h in fluid food industry. There has been a considerable amount of work on modeling of the fouling process as well as the hydrodynamic and thermodynamic performances of heat exchangers. A variety of different fouling kinetics exists depending upon food components, types of heat exchangers and operating conditions. The available information on existing fouling models is summarized in terms of fouling mechanisms, dynamic performances of heat exchangers and integrated fouling dynamics. This review provides the basis for developing a vision of further research for understanding, quantifying and minimizing fouling of food materials in heat exchangers.     

密集烤房加热设备材质与结构优化设计研究

为了降低密集烤房建造成本,提高换热器使用寿命,选用铸铁和碳化硅陶瓷耐腐蚀材料制作烤房换热器。对比试验结果表明,铸铁和碳化硅陶瓷耐腐蚀材料的换热器在烤烟过程中的温差、耗煤量和热能利用效率等参数与生产所用的钢制材质换热器基本相当,部分参数优于对照,满足烟叶烘烤要求。同时改进的换热器具有抗腐蚀、易清灰、安装、保养等优点,可有效解决金属材质换热器易腐蚀、使用年限短等问题,具有较好的推广应用前景。     

大型纸机油站油温高的解决措施

北方大型纸机的油站热交换器因结垢、灰尘和菌泥沉积等原因造成热交换效率低,当油站油温高时可能引起纸机意外停机,成为影响纸机效率的主要因素之一。通过对油站冷却水系统的工艺优化（加过滤器和过滤网、使用抑垢剂、使用去离子水、使用杀菌防腐剂和定期清洗等措施）,基本解决了上述问题。     

基于FLUENT的管壳换热器壳程流场数值模拟与分析

通过简化管壳式换热器模型,采用非结构网格划分,选用κ-ε湍流模型,应用CFD软件FLUENT对壳程流体流动和传热过程进行了数值模拟,得到了不同折流板间距情况下壳程流体温度场、压力场以及速度场的分布情况。分析了折流板间距对壳程流体流场分布、换热器传热速率以及压力损失的影响,并得出了进口流速与传热量和压力损失之间的关系。模拟结果与理论研究结果相符合,对管壳式换热器的设计和改进有一定的参考价值。     

油脂精炼脱臭中高温油油换热器的应用实践

对植物油精炼脱臭中的几种高温油油换热器进行对比,分析了各自的特点。在考虑不同工艺要求、投资成本以及脱臭油品质的情况下,降膜换热器适用范围最广,真空热回收换热器适用于大豆油、菜籽油等油品的冷热油热交换,Compabloc全焊型板式换热器适用于玉米油、葵花籽油的冷热油热交换。     

Improved heat exchanger networks for energy conservation in palm oil refineries

In designing a network of heat exchangers for the recovery of waste heat, there is usually a'pinch' at which the minimum approach temperature difference limits energy recovery. Pinch technology emphasizes the importance of utility targets, which are independent of the network design, and so allow a very useful comparison with the utility requirements of actual networks. The design of a heat recovery network of exchangers used in palm oil refining has been examined using such pinch technology targeting procedures. The network was found to be well designed for the situation where steam is a cheaper utility than hot oil. As this was not the case, improved networks were designed. These allowed a significant reduction in heat exchanger surface area for the same energy consumption, or a 25% reduction in energy consumption for a modest increase in network area of about 10%.     

一种高效管壳式换热器的应用

换热器的结构型式不同，其换热效率差别很大。对管壳式换热器结构做出局部改动，可以提高换热效率。     

MODELLING of the MEDIA-SIDE HEAT TRANSFER IN SCRAPED SURFACE HEAT EXCHANGERS

The heat transfer on the media-side and in the tube wall of scraped surface heat exchangers was investigated when the product was heated with steam or cooled with water. The heat transfer coefficients found experimentally were 15% higher than predicted with the Nusselt theory for steam condensation, and 30% lower than predicted with a traditionally recommended model for cooling with water. New, much better models for the media-side heat transfer were developed. the choice of model for the media-side affects a subsequent modelling of the heat transfer on the product-side. When the product-flow was laminar in the scraped surface heat exchangers, the heat transfer was controlled mainly by the resistance on the product-side; while the resistance on the media-side was very small. Vortical flow decreased the resistance on the product-side considerably and made the choice of material in the tube wall important from a heat transfer point of view.     

换热器强化传热技术

换热设备在工业生产中占有重要地位,其传热性能的好坏对节能有着重要意义。比较全面地介绍了换热器的强化传热技术及其应用,列举了相应的强化传热新结构;点明了强化传热技术的选用,以期对今后的强化传热研究工作提供帮助。