| 摘要 |
The invention provides a method for manufacturing intermediate products for preparation of animal feeds comprising the steps of: a) heating a crude granular raw material in a heating device; and b) subject the heated raw material to a final rocessing in order to obtain the intermediate product; wherein energy from the heating process is recovered by: i) feeding the heated crude raw material from the heating device to a container; ii) placing the heated raw material in contact with cold air in counterflow to the feed of the heated raw material in order to heat and moisten the cold air and to cool and dry the raw material; iii) feeding the heated moist air back to the heating device. The invention relates in particular to a method wherein the heating process is a so-called toast process. The invention further comprises a system of devices for applying the method comprising a heating device, means for feeding the crude raw material to the heating device, a container for temporary storage of the heated raw material, discharge means and feed means for the heated raw material from and respectively to the heating device and the container, means for supplying cold air to the heated raw material stored in the container in counterflow to the feed of the heated raw material, discharge means and feed means for the cooled raw material from and respectively to the container and a final processing device, and means for discharging heated moist air to the heating device. <IMAGE> |
