The Design And Research Of High-pressure Water-jet Heat Exchanger Cleaner

Heat exchanger is a kind of energy-saving device that can transfer heat energy between materials,It is widely used production equipment in petrochemical industry.After a certain period of continuous work,these devices usually suffer from mineral build-up,which greatly reduces the heat transfer area and affect the heat transfer efficiency,resulting in abnormal production.We performed comprehensive surveys and comparisons between existing heat exchanger cleaning technologies,and proposed the blue print and the related target technical specifications based on our study and analysis of the heat exchanger and mineral buildup principles.In this paper,a novel high-pressure water-jet heat exchanger cleaner that can fulfill industry demands is developed.We will analyze the characteristics of the heat exchanger tube and shell to develop two different cleaning approaches.We will design the mechanisms and the structures of the heat exchanger tube and shell cleaner,and select the components and parts according to our technical requirements.The parts and assemblies are designed and virtually assembled using SolidWorks 3D modeling software,the complete heat exchanger cleaner is developed in such a manner.In order to validate the design,a prototype of the hand-hold cleaner is made in the machine shop.The control process is also introduced in this thesis.In addition,the critical parts and components are evaluated using static load analysis and modal analysis in ANSYS workbench environment to validate the rationality of the design,where the structure of the critical components are optimized according to the analytical results.Thus,the stabilities and strengths of the structures are ensured,and the risks of potential harmful resonances during the operation are avoided.In summary,the designed high-pressure water-jet heat exchanger cleaner in this thesis is an ideal replacement of manual cleaning operations.It is an automatic,safe and high-efficiency solution for heat exchanger cleaning.It will also become a significant benchmark for other kinds of large equipment cleaning device developments in the future.