Shell and tube side problems in shell-and-tube heat exchangers
Thread Content
May I ask how it is determined which materials will be used in the shell side and tube side of the shell-and-tube heat exchanger? How is this decision made? What aspects are taken into consideration? There is a chlorine cooler in which chlorine flows through the shell layer while water flows through the tube layer ； But there is a liquid chlorine vaporizer in which chlorine gas flows through the tube layer while hot water flows through the shell layer; I can’t figure it out.
:):'(I’ve read so much already – why hasn’t anyone experienced come to give me some advice?
Having read so much, why hasn’t anyone knowledgeable come to give some advice yet? :):'(
Having read so much, why hasn’t anyone knowledgeable come to give some advice yet? :):'(
Have you noticed that their hot fluid streams all flow through the shell side, while the cold fluid streams all flow through the tube side? Perhaps that’s the problem, but I think it has something to do with the flow rate of the material; after all, the cross-sectional area for flow in the tube side is smaller than that in the shell side (in terms of the equipment).
For tubes that tend to scale and get dirty easily, cleaning is a primary concern; steam condensation heating takes place in the shell side. In gas-liquid heat exchange, the gas usually flows through the shell side. The rest depends on the circumstances. For reference
Materials that are highly pressurized, toxic, harmful, prone to scaling, or prone to polymerization are generally used in the tube side... Conversely, those materials are used in the shell side... Refer to the chapter on heat exchangers in the principles of chemical engineering. There are always a few exceptions to every rule... perhaps this is your chance to make some changes.
1. Unpure and scale-prone fluids should flow inside the tubes, as it is easier to clean them there. 2. Corrosive fluids should also flow inside the tubes, to prevent both the casing and the tubes from being corroded simultaneously. 3. Saturated steam is best passed through the spaces between the tubes, so that condensate can be removed promptly. 4. Fluids with high pressure should flow inside the tubes, to avoid putting stress on the casing. 5. Toxic fluids should be routed through the tube layers, to reduce the risk of leaks. The above information is for reference only