The Calculation Methods of the Heat Balance for Recovering the Vaporous Water from Exhaust Gas in Ammonium Phosphate Production

Abstract:

The volume content of water vapor in ammonium phosphate exhaust gas is about 12-20%, and the temperature is about 70-80°C. If the exhaust gas are directly discharged through the chimney, the water vapor in it will easily condense and fog because of local supersaturation, resulting in some energy and water losing. The cool water spray condensing can be used to recover water vapor from exhaust gas, and it can recover most of the water vapor and the sensible heat and the latent heat of the water vapor in the exhaust gas. Carrying out the energy balance and material balance calculations quickly and accurately is one of the major concerning problems for project design. This paper presents a calculation method for the heat balance by calculation the enthalpy difference of the water in the exhaust gas, compared with the method by directly calculating the heat in water vapor condensing process. Both the results are in good agreement, but the enthalpy difference method is more concise. The calculation methods and procedures are of practical engineering application values.

• Periodical: Advanced Materials Research (Volumes 881-883)
• Pages: 649-652
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.881-883.649
• Online since: January 2014
• Authors: Dan Zhu, Peng Yun Song
• Keywords: Ammonium Phosphate Exhausts, Calculation Method, Enthalpy Difference Method, Heat Balance Method, Spray Condensing

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