Expert speaker: Ms. Qu Yinglin – Heat exchanger technology; one-on-one interactive session
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1.jpg Qu Yinglin, Senior Engineer and expert in heat transfer technology, currently serving as the deputy head of HTRI CC China. With over 10 years of experience in designing heat exchanger solutions, I have designed more than a thousand heat exchangers for various industries including petrochemicals, coal chemistry, soda ash production, ammonia synthesis, power generation, and HVAC. More than 20 patents were obtained during the work period, and numerous articles were published. Personal achievements: 1. Conceptual design of some high-efficiency heat exchangers for large-scale domestic petrochemical plants. 2. Design of the first domestic solution for high-throughput tubes in domestic PDH units. 3. Research and design of the high-vacuum condenser for coal-based ethylene glycol plants. I’m glad to share technical discussions on the topic of heat exchangers with like-minded colleagues in the chemical industry. Members who have questions and need to discuss them together can leave a reply under this topic; I will do my best to address those issues with everyone as soon as possible!
I would like to learn from the expert* – may I ask, what are the types of non-disassemble flow-plate heat exchangers? How to calculate it?
Question: In our steam-heated shell-and-tube heat exchangers, once the production volume reaches a certain level, they stop performing heat exchange, as if no steam is entering the heat exchanger. What is the reason?
Hello: When designing a heat exchanger, the size of the connections is determined based on the allowable pressure drop and safe flow velocity. When the steam flow rate during operation far exceeds the designed value, the flow area of the connections becomes too small, resulting in high resistance; the resistance associated with the steam flowing through these pipes also increases. As a result, the steam does not have enough momentum to enter the equipment. During the operation of the heat exchanger, if it is necessary to increase the steam flow rate, it is best to have the manufacturer who designed it calculate its maximum capacity. This is safer. Improving fertility can easily lead to problems such as vibration damage.
Currently, heat exchangers without baffle plates are widely used, including plate heat exchangers, spiral plate heat exchangers, coil tube heat exchangers, and shell-and-tube heat exchangers. Shell-and-tube heat exchangers can also be designed with a structure without baffle plates depending on the specific operating conditions; for example, in situations involving phase changes such as condensation and boiling, or during gas heat exchange, structural designs that use only support plates are adopted to address issues such as vibration and pressure loss.
For the several types of flow-plate-free heat exchangers mentioned above, it is necessary to find manufacturers that produce such heat exchangers in order to carry out selection and calculation tasks. For shell-and-tube heat exchangers without baffle plates, heat exchanger calculation software can be used for these calculations, such as HTRI or EDR, as well as HTFS
A warm welcome to the experts; tribute to the masters
Master, when will the class on HTRI start?
Experts are welcome. Our company also specializes in high-efficiency heat exchangers; I’d be happy to offer guidance if you have time!
Starting a topic like this is an excellent learning opportunity for those of us who have just entered this industry! Thank you, expert!