| 摘要 |
PURPOSE:Wheat grains for brewing are roasted by irradiating them with far infrared rays to enable uniform roasting without surface carbonization with high heat efficiency and saved installation costs. CONSTITUTION:Solid particles of high emissivity 9 such as ceramics are heated with burners in the heating zone 1. In the following far infrared heating zone 2, the heated solid particles 9 are conveyed a they are mixed with wheat grains for brewing, thus the grains are roasted. In the separation zone 3, the roasted grains are separated from the solid particles. The roasted grains are conveyed out of the outlet 4 and the separated solid particles are conveyed back to the heating zone 1. As a result, the grains are mainly heated from the inner part to give uniformly roasted grains without surface carbonization. Moreover, it is a direct heating system and so heat loss outside the installation is reduced. In addition, the duct for exhaustion to the outdoor becomes unnecessary and an energy-saving type installation can be constructed at reduced costs. |
