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Heat exchange area of the flash tank

2018-05-07View Original

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Use raw steam at 1 atm, 340 degrees Celsius, and a flow rate of 10,000 kg/h to heat an aqueous sodium sulfate solution with an initial temperature of 70 degrees Celsius. The temperature of the raw steam drops to 25 degrees Celsius, while the temperature in the flash tank is 120 degrees Celsius. The flow rate of sodium sulfate is 40,000 kg/h; it is a 4% sodium sulfate solution. According to the ASPEN simulation, the heat requirement of the flash tank is 13,836.2936 KW. How should the heat exchange area of the flash tank be calculated? Thank you
Reply #22018-05-07
This is clearly solution concentration – just use an evaporator; what’s the point of using a flash tank? The flash method commonly used in the chemical industry is adiabatic flash. When using Aspen for simulation, you should first select the heat exchanger plus flash model.
Reply #32018-05-08
1 atm, 340 degrees Celsius – excessively superheated steam? Is it possible to reduce the steam temperature to 25 degrees Celsius? I can’t understand this operating condition; could someone who is an expert explain it?
Reply #42018-05-08
I’m here to see the amazing steam at 1 atm and 340°C~~~

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