Seeking help online, thank you
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In the chlor-alkali industry, chlorine compressors employ two-stage compression, with a first-stage chlorine cooler and a second-stage chlorine cooler; both of these coolers use circulating water for cooling. Due to the poor quality of the circulating water, it is desired to switch to pure water for cooling in order to prevent corrosion caused by the circulating water. Additionally, a plate heat exchanger will be installed to cool the pure water, using circulating water as the coolant. The existing first-stage and second-stage coolers are of the shell-and-tube type, with an area of 211㎡. The inlet and outlet temperatures for the first-stage chlorine cooler are 85/40, while those for the second-stage cooler are 95/35. The heat exchange tubes are made of 20# steel. The pure water cooler (plate heat exchanger) is made of titanium. I would like to know how to calculate the area of this plate heat exchanger
There should be software for calculating area online; you can download it. As long as you know the flow rate of the pure water in the circulation system, the inlet and outlet temperatures of that pure water, as well as the inlet and outlet temperatures and flow rate of the circulation water itself, you should be able to calculate it.
As is known for those who use shell-and-tube heat exchangers, with plate heat exchangers the temperature of the feed water in the circulation system is known, while there are no restrictions on the return water temperature; however, the temperatures of the feed and return water for pure water are unknown, although the flow rate is known
Isn’t ordinary circulating water being used now? Isn’t the temperature of the circulating water in the shell-and-tube heat exchanger now simply the water temperature after it has been replaced with pure water?
What software to use? Heat exchanger master? It seems it needs to be verified
I have two points to make: First, are you sure that the corrosion caused by pure water is less than that caused by circulating water? At high temperatures, the corrosion of pure water is more severe than that of ordinary water! Second, your problem lies with the circulating water; you need to find a way to solve the issue with it! What about other heat exchangers?
I wonder how high the temperature of pure water can reach during the heat exchange process? It’s probably around 60 degrees at most; the corrosivity is relatively low. I think there’s no problem using pure water for heat exchange.
There are free ones, just look around on the forum
The temperature is very low; how can the corrosiveness of pure water be as high as that of circulating water? Also, the factory needs to be modified; I think the problem with circulating water should be solved at its root
What is the pH of the pure water produced by your company? It is generally less than 7; you can measure it.
I think changes should be made carefully; it’s not just the corrosion issue to consider. After switching to pure water cooling, the temperature of chlorine will definitely rise, and approaching the ignition temperature of chlorine can lead to accidents.