Fly ash and coal ash hydrothermal reaction solid-liquid phase product cooperative treatment method
A hydrothermal reaction and synergistic treatment technology, applied in chemical/physical processes, ion exchange treatment devices, silicon compounds, etc., can solve the problems of reducing the concentration of heavy metals and unable to reduce the content of heavy metals in hydrothermal liquids
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Embodiment 1
[0048] This embodiment provides a method for synergistic treatment of fly ash and fly ash hydrothermal reaction solid-liquid phase products, and its specific steps are:
[0049] (1) Evenly mix fly ash and fly ash in a ratio of 9:1;
[0050] (2) Add the reaction solution to the mixture in step (1), and mix it uniformly to form a precursor solution; the mixing method is: place the precursor solution at room temperature and stir at a rate of 900r / min for 6 hours, and then ultrasonically treat it for 3 hours to make the mixture The mortar is evenly distributed;
[0051] (3) Seal the precursor solution in the step (2) in a reaction kettle for hydrothermal reaction, the temperature of the hydrothermal reaction is 160° C., and the time is 36 hours.
[0052] It should be noted that the treatment agent used in this example is a distilled ammonia solution with a pH of 12.86, and the distilled ammonia solution includes sodium hydroxide, ammonia water, 43.6 mg / L calcium chloride, 34.4 mg...
Embodiment 2
[0055] This example provides a method for synergistic processing of fly ash and fly ash hydrothermal reaction solid-liquid phase products, its specific implementation is basically the same as Example 1, the main difference is: fly ash and fly ash in this example Mix evenly at a ratio of 8:2.
[0056] After the reaction, the reactor was naturally cooled to room temperature, and the reaction product was separated into solid and liquid with filter paper, and the separated solid was dried at 60°C to constant weight for further analysis. Finally, the original fly ash, fly ash and hydrothermal products were analyzed for heavy metal leaching toxicity, heavy metal content, heavy metal form distribution, heavy metal content and pH in hydrothermal liquid, in order to judge the effect of hydrothermal stabilization of heavy metals, and the final hydrothermal solid product And the test of the heavy metal content in the hydrothermal liquid is shown in Table 5 and Table 6, and the hydrotherm...
Embodiment 3
[0058] This example provides a method for synergistic processing of fly ash and fly ash hydrothermal reaction solid-liquid phase products, its specific implementation is basically the same as Example 1, the main difference is: fly ash and fly ash in this example Mix evenly in a ratio of 7:3.
[0059] After the reaction, the reactor was naturally cooled to room temperature, and the reaction product was separated into solid and liquid with filter paper, and the separated solid was dried at 60°C to constant weight for further analysis. Finally, the original fly ash, fly ash and hydrothermal products were analyzed for heavy metal leaching toxicity, heavy metal content, heavy metal form distribution, heavy metal content and pH in hydrothermal liquid, in order to judge the effect of hydrothermal stabilization of heavy metals, and the final hydrothermal solid product And the test of the heavy metal content in the hydrothermal liquid is shown in Table 5 and Table 6, and the hydrotherm...
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