Incineration fly ash cement kiln synergic processing process
A technology of fly ash incineration and co-processing, applied in cement production and other directions, can solve problems such as improper disposal of heavy metals, and achieve the effect of avoiding high energy consumption
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Embodiment 1
[0021] The incineration fly ash of a circulating fluidized bed in a municipal solid waste incineration plant, the element content of Cl is 3.20wt%, Al 2 o 3 , CaO, SiO 2 , the contents are respectively 23.19%, 10.95%, 42.22%, accounting for 76.36% of the total.
[0022] Mix about 1 ton of fly ash and water in each batch according to the mass ratio of water-cement ratio of 3:1 in 1# washing kettle, and send the ash-water mixture into 1# belt filter press with slurry pump after 10 minutes The fly ash filter cake is obtained by dehydration, and the fly ash filter cake is sent to the 2# washing tank by the conveyor belt for the second washing operation with the same process parameters, and then the ash-water mixture is sent to the 2# belt filter press with the slurry pump Dehydration, the filtrate of 2# belt filter press is circulated for the washing process of 1# washing kettle, and the fly ash filter cake is sent to the 3# washing kettle through the conveyor belt for the third...
Embodiment 2
[0024] Fly ash and water are mixed and stirred in the washing kettle according to the mass ratio of water-cement ratio 10:1, washed with water for about 10 minutes, and then left to settle for half an hour, so that the supernatant overflows to the waste water treatment tank; then add clean water to the washing kettle to The original water-cement ratio, after stirring and washing for about 5 minutes, use the slurry pump to send the gray-water mixture into the plate-and-frame filter press to obtain the fly ash filter cake. The moisture content of the fly ash filter cake is 30%, and the chlorine element content down to 0.52wt%. The washing wastewater is passed into the tail gas of the cement kiln flue for acidification treatment, and when the pH value reaches 6-9, a flocculant is added and stirred for 5 minutes, and then the flocculation and sedimentation treatment is carried out to obtain the wastewater treatment sediment. Fly ash filter cake and wastewater treatment sediment ar...
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