One-on-one interactive forum by technical expert “Fei Tong Fang Xiang” on heat exchanger technology
Thread Content
1.jpg A senior engineer with a bachelor’s degree in Chemical Engineering and Technology, an expert in high-efficiency heat transfer technologies, and an expert in the manufacturing of high-efficiency heat exchangers. He has 7 years of experience in the selection and design of heat exchanger processes, as well as 7 years of experience in managing heat exchanger manufacturing. Over a thousand heat exchangers have been designed and manufactured according to specific processes, covering various fields such as petrochemicals, fine chemicals, coal chemistry, fertilizers, soda ash, power plants, and heating systems. More than 10 patents were obtained during the work period, and several professional papers were published. Personal Achievements: Process design of high-efficiency reboilers for propylene distillation columns in 4 domestic million-ton ethylene plants ； Production of China’s first U-type high-throughput double-tube-sheet heat exchanger ； Domestic production of advanced surface condensers from abroad ； Manufacturing of high-vacuum condensers for ethylene glycol plants using domestic production.
The experts are welcome; it is commendable that they take the time to interact with fellow sailors despite their busy schedules.
Do you have standard catalogs for U-type heat exchangers?
Could you recommend any manufacturers of steam radiators capable of withstanding a pressure of 64 kilograms? Thank you
Can I raise the issue regarding the liquid chlorine liquefier?
Is there a standard atlas for this as well? This is calculated based on different operating conditions; it’s not a standard part
What’s the problem? Bring it up first so everyone can take a look
Our company’s liquid chlorine liquefaction and refrigeration unit has four refrigeration machines. Currently, two units have low suction pressure (around 0.5 kilograms, whereas it used to be 1.5 kilograms). When the liquid supply valve is opened slightly, frost forms on the refrigeration head due to liquid slugging; similarly, opening the chlorine valve at the end of the liquefier slightly also results in liquid chlorine flowing through. Over several days, every possible method of adjustment was tried; the system was filled with Freon as well, but it still didn’t work. I would appreciate it if the experts present could provide a diagnosis and suggest how to treat this condition
Question: For the condenser of a C5 light hydrocarbons distillation tower, can the cooling water flow in the tube side be designed as multiple tube passes?
This is a question related to the field of process engineering; calculate the temperature difference correction factor according to Appendix B of GB/T151. If this factor is 0.8 or higher, it is feasible to design the system with a multi-pass structure.
This is probably a system issue; I’m not very familiar with it, sorry.