Heat exchanger selection problem
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There is a steam condensate tank from which steam constantly emerges at the top; it’s possible to recycle that steam. It is planned to add a heat exchanger to the top gas pipeline for cooling with circulating water. The temperature at the top of the tank is around 70°C, and it is planned to reduce this to 30°C. The gas flow rate is approximately 1400 Nm3/h, and the pipes have a diameter of around DN200. What size heat exchanger is required? It would be helpful to have an approximate calculation process. Thank you!
It is recommended to get a copy of \"Principles of Chemical Engineering\" to read, or to contact a heat exchanger manufacturer – they will provide you with comprehensive guidance. It’s worth giving it a try.
70C？ It should just emit white smoke occasionally; can it produce a continuous flow?
Do you intend to recycle the steam condensate? Using circulating water for cooling is not appropriate; as the temperature of the circulating water rises, it needs to be lowered again. It would be better to consider spraying deoxygenated water into the condensate tank.
You’re trying to design a heat exchanger, right? It’s pretty similar to my graduation project; it took me several months to finish it – so how can you expect to figure this out so quickly?
Cooling with an upper heat exchanger, taking condensation recovery into account – the cost-effectiveness is too low; it’s not worthwhile； It’s necessary to recalculate the thermal integration; determining where this amount of steam’s thermal energy can be utilized is what’s reasonable.
Normally, it can be calculated using htri, but the following factors need to be taken into account: 1. Whether this steam at 70°C is saturated steam, or what the operating pressure is for the steam supply； 2. Circulating water conditions are provided; due to limitations imposed by the inlet water temperature, it is generally difficult for circulating water to cool or condense the steam to 30℃ ； 3. Does the steam have a stable flow rate? ； 4. If a cooler/condenser is to be used, please consider its cost-effectiveness ；