| 摘要 |
<p>The present invention is provided with: a reference gas supply source (115) that adds a reference gas (4) of nitrogen gas to a carbonization gas (3); a combustor (120) that combusts a mixed gas of the carbonization gas (3) and the reference gas (4), and sends out an inspection gas (9); a gas rheometer (132) that measures the flow rate (Fi) of the inspection gas (9); a gas concentration measurement device (131) that measures the concentration (Cn) of the nitrogen gas and the concentration (Cc) of carbon dioxide in the inspection gas (9); and a computation control device (130) that determines the flow rate (Fn) of the nitrogen gas in the mixed gas from the flow rate (Fi) and the concentration (Cn), determines the amount (Wc) generated of carbon components in the carbonization gas (3) from the flow rate (Fs) of the reference gas (4) supplied to the carbonization gas (3), the flow rate (Fa) of the air (8) supplied to the combustor (120), and the flow rates (Fn) and (Fi) and concentration (Cc), determines the carbonization fraction (Dt) of carbonized charcoal (2) from the concentration (Cg) of carbon components in low-grade charcoal (1), the amount (Wc) generated, and the supply weight (Wo) of the low-grade charcoal (1), and controls a valve (118a) in a manner so as to result in a target carbonization fraction (Dr).</p> |
