| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a scrubber which achieves reduction in the amount of clean water to be replenished, efficiently removes a contaminant in the gas to be treated and suppresses the discharge of the contaminant to the outside. <P>SOLUTION: The scrubber 10 has a packed column 1 in which a first packed layer 2 is arranged in a lower stage and a second packed layer 3 is arranged in an upper stage. The circular cleaning water W<SB POS="POST">1</SB>stored in a water storage part 5 is supplied to the first packed layer 2 through a water spraying pipe 4 and the clean water W<SB POS="POST">2</SB>is supplied to the second packed layer 3 through a water spraying pipe 7. Since the contaminant-containing gas G<SB POS="POST">1</SB>to be treated is first scrubbed roughly by the circular cleaning water W<SB POS="POST">1</SB>in the first packed layer 2 and the gas G<SB POS="POST">1</SB>, which is to be treated and contains the low concentration of the contaminant, is brought into gas-liquid contact with the clean water W<SB POS="POST">2</SB>in the second packed layer 3, excellent contaminant removal performance can be attained even when the amount of the clean water W<SB POS="POST">2</SB>to be used is reduced, and the concentration of the contaminant in the exhaust gas to be discharged from the scrubber 10 to the outside can be decreased. <P>COPYRIGHT: (C)2013,JPO&INPIT |
