| 摘要 |
<p>PURPOSE:To efficiently produce a stack gas desulfurizing agent by heat-treating the powder of a crushed shell at a specified temp. for a specified time. CONSTITUTION:The shell powder crushed to about 10mum to 30mm size is heat- treated at 300-400 deg.C for >=30min to efficiently produce a stack gas desulfurizing agent. Consequently heat energy is saved since the powder is treated at low temp., and the useful desulfurizing agent is produced from the shell as the waste. When the agent is used, the COD value of the waste water is reduced to <= about 5ppm by treating the waste water with activated carbon or chlorine, and the waste water is discharged without any trouble.</p> |
