Harmless treatment method of garbage incineration fly ash dioxin
A technology for waste incineration fly ash and harmless treatment, which is applied in the field of comprehensive utilization of solid waste resources, can solve the problems of low efficiency, secondary environmental pollution, and high chlorine concentration, and achieves the effect of reducing costs and avoiding resynthesis.
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[0027] Example 1
[0028] 30wt% of waste incineration fly ash, 40wt% of waste glass powder, 15wt% of pickling sludge and 15wt% of dolomite powder are uniformly mixed to obtain a mixture, which is subjected to 10MPa compaction to obtain a compact. The compact is heated at 1000°C for 60 minutes, the dolomite is decomposed and the glass melt is foamed, and then the temperature is lowered to 500°C and annealed for 60 minutes to obtain foam glass. Then the temperature was raised to 800°C for nucleation and crystallization heat treatment for 30 minutes, and then cooled to room temperature with the furnace to obtain a foamed glass ceramic product. During the melting and foaming process, chlorine atoms react with calcium oxide and magnesium oxide and solidify in the glass melt. After subsequent annealing, nucleation and crystallization, they are solidified into foam glass ceramics, which reduces the need for dioxins synthesis in the flue gas. The chlorine content. The flue gas is quenc...
Example Embodiment
[0029] Example 2
[0030] 33wt% of waste incineration fly ash, 42wt% of waste glass powder, 12wt% of pickling sludge and 13wt% of dolomite powder are uniformly mixed to obtain a mixture, which is pressed by 15MPa to obtain a compact. The compact is heated at 1010°C for 58 minutes, the dolomite is decomposed and the glass melt is foamed, and then the temperature is lowered to 510°C and annealed for 57 minutes to obtain foam glass. After heating to 795°C for nucleation and crystallization heat treatment for 32 minutes, it is cooled to room temperature with the furnace to obtain a foamed glass-ceramic product. During the melting and foaming process, chlorine atoms react with calcium oxide and magnesium oxide and solidify in the glass melt. After subsequent annealing, nucleation and crystallization, they are solidified in the foam glass-ceramics, reducing the need for dioxin synthesis in the flue gas The chlorine content. The flue gas is quenched, and the flue gas is reduced to 185...
Example Embodiment
[0031] Example 3
[0032] 36wt% of waste incineration fly ash, 44wt% of waste glass powder, 9wt% of pickling sludge and 11wt% of dolomite powder are uniformly mixed to obtain a mixture, which is compacted by 20MPa to obtain a compact. The compact is heated at 1020°C for 56 minutes, the dolomite is decomposed and the glass melt is foamed, and then the temperature is lowered to 520°C and annealed for 54 minutes to obtain foamed glass. After heating to 790°C for nucleation and crystallization heat treatment for 34 minutes, it is cooled to room temperature with the furnace to obtain a foamed glass-ceramic product. During the melting and foaming process, chlorine atoms react with calcium oxide and magnesium oxide and solidify in the glass melt. After subsequent annealing, nucleation and crystallization, they are solidified in the foam glass-ceramics, reducing the need for dioxin synthesis in the flue gas The chlorine content. The flue gas is quenched, and the flue gas is reduced to ...
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