| 摘要 |
<p>PURPOSE:To desulfurize exhaust gas and recover SO2 in the gas in the form of S simply without the necessity for the manufacture of reducing agent separately by using a part of fuel coal consistently from the adsorption process of SO2 to its reduction process to S in the desulfurization of exhaust gas. CONSTITUTION:Coal is pulverized into the dust coal 23 and then burned in the boiler 1. On the other hand, a part of unpulverized coal is supplied to the coal carbonizator 4 to manufacture semi-coke which is, in turn, packed into the adsorption tower 2. Then, the combustion waste gas from the boiler 1 is introduced into the adsorption tower 2 to cause the SO2 component present in the waste gas to adsorb in the semi-coke and then discharged from the stack 10. The SO2-adsorbed semi-coke is then sent to the separation tower 3 where it is heated 300-400 deg.C by the high-temperature inert gas circulation pipe 20, whereby SO2 is released from the semi-coke, introduced into the converter 5 to reduce SO2 by the semi-coke present into the element S, and then recovered in the form of the liquid sulfur 8 by the sulfur condenser 7.</p> |
