| 摘要 |
<p>PURPOSE:To provide a carbonization device so designed that temperature fall is prevented and temperature distribution uniformized in a rotary kiln-type carbonization oven when preheated air is to introduced into the oven to improve both carbonization efficiency and carbonized product yield. CONSTITUTION:The device is equipped with (A) a rotary kiln-type carbonization oven 1, (B) a flue gas treating means 3 for flue gas produced as a result of carbonization, (C) a pipe 4 through which air is introduced into the carbonization oven and (D) a heat exchanger 5 to heat the air introduced above by the exhaust gas from an afterburner 23. The down stream end of the pipe 4 is made to communicate with on the side of a coal material feed section 12 for the oven 1 and the upstream end of a flue gas outlet pipe 21 on the side of a carbonized product discharge section 13. The flue gas treating means is equipped with the 2nd blower 24 for forced suction of the flue gas from the oven 1 and the pipe 4 with the 4th blower 28 to force feed preheated air into the oven 1. Both the blowers are controlled by a controller 15 based on the detected values from a pressure sensor 14 to ensure maintaining the inner pressure in the oven 1 at a specified value a slightly lower than the atmospheric pressure.</p> |
