| abstract |
The invention relates to a dust collection system for removing and recovering heavy metal dust in flue gas, comprising a rotary kiln, a secondary combustion settling chamber, a quenching tower, a first dust collector, a circulating fluidized bed absorption tower, a second dust collector connected in sequence The bottom of the circulating fluidized bed absorption tower is provided with a desulfurizer storage and a water nozzle, the middle part is provided with an active coke purification filter layer, and the upper part is provided with an ammonia gas nozzle; the air outlet of the second dust collector is connected to the air filter The air filter is connected with the exhaust chimney through the fan; the first dust collector, the second dust collector and the fan are respectively electrically connected with the control cabinet, and the control cabinet is provided with a PLC controller and a pulse controller. The invention has good treatment and purification effect on the flue gas containing heavy metal dust, and can recover the lead dust in the flue gas. At the same time, it can further purify the air; the use of plastic sintered filter element in the dust collector is conducive to improving the cleaning effect, the filter element has a long service life and low cost, and can meet the requirements of the current national environmental protection standards. |