| 摘要 |
<p>PURPOSE:To enable the replenishment of a proper amt. of caustic soda according to boiler load with the device for absorbing away SO2 by circulating and spraying an absorptive liquid contg. the caustic soda to the waste combustion gas of a boiler. CONSTITUTION:The flow rate and SO2 concn. of the exhaust gas of the boiler 1, the pH value of the absorptive liquid and the pressures before and after a caustic soda supply valve 4' are detected and the caustic soda supply valve 4' is controlled in accordance therewith.</p> |
