| abstract |
The invention discloses a kind of process for removing heavy metal in flue gas lead, take using sodium bicarbonate as particulate form lead Pb in absorption flue gas p Bed, utilize the gap absorption particulate form lead Pb of the sodium carbonate that reacts with smoke gas pyrolysis of sodium bicarbonate p , make element state lead Pb in flue gas using the active oxidation substance that oxidation reaction generates 0 It is converted into oxidation state lead Pb 2+ , come into full contact with using the mixed liquor that the sodium bicarbonate after sodium bicarbonate and pyrolysis adsorption and oxidation adds water to prepare as spray liquid and flue gas, remove the oxidation state lead Pb in flue gas 2+ The particulate form Pb not being removed with step (1) p And oligo-element state Pb 0 .The present invention compensates for Conventional processing methods and generally takes off the inefficient disadvantage of lead compared with the de- splicer's skill of existing tradition；And spray operation operational process, without fouling, blocking risk, insensitive to flue gas fluctuation, the adaptability of device is good；The problem of overcoming the secondary sewage and the pollution of secondary solid waste that wet process is denounced, has good economy and environmental benefit. |