1219 廃熱を利用した間欠減圧式乾燥装置の開発(GS-6 熱プロセス・燃焼排出物,研究発表講演)

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  • 1219 Development of intermittent suction dryer using exhaust heat

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Recently, there has been a need for effective use of low temperature exhaust heat. So, we have suggested the intermittent suction dryer which can use low temperature exhaust heat (steam of latm or water of less than 100℃) as a heat source and use steam condensation in an auxiliary vacuum tank for reducing chamber pressure intermittently. Heat and mass transport mechanism in material to be dried under intermittently reducing pressure, and the utility of intermittent suction effect were investigated experimentally. Used coffee grounds were used as the material to be dried, both the temperature and moisture content distributions were measured. The heat flux from heat source to sample was also measured. From these results, it was shown that water in the area of greater than saturation temperature evaporated rapidly under intermittently reducing pressure and some vapor condensed in the area of less than saturation temperature. Evaporation became rapid at intermittent reducing pressure.

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