A process for preparing hydrogel zeolite from waterworks sludge and application of hydrogel zeolite
A hydrogel zeolite, hydrogel technology, applied in water/sludge/sewage treatment, water/sewage treatment, adsorbed water/sewage treatment, etc. The effect of low energy consumption, short reaction time and high purity
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Embodiment 1
[0026] Such as figure 1 The shown technological process prepares hydrogel zeolite, specifically as follows:
[0027] (1) Mash and dry the sludge from the waterworks, then grind it into powder and spread it on a large porcelain boat, and bake it at 800°C for 1 hour, and it will appear pottery red. If the color of the inner layer is white, it means that the roasting is not sufficient. It needs to be mixed and then roasted until it is completely pottery red to obtain marl ash. At this time, the main component of marl ash is SiO 2 and AlPO 4 When the crystal powder is not completely burned, the composition of the inner and outer layers of the sludge is detected such as figure 2 shown; figure 2 The color of the topsoil is pottery red in middle, it is fully in contact with oxygen, fully oxidized, and SiO 2 and AlPO 4 The characteristic peaks are thin and high, and the crystals are mature; while the inner soil color is yellowish, SiO 2 and AlPO 4 The characteristic peak is ...
Embodiment 2
[0032] (1) Mash and dry the sludge from the waterworks, then grind it into powder and spread it evenly in a large porcelain boat, and bake it at 750°C for 1.2 hours. Both the inner and outer layers of the sludge appear pottery red, indicating that the roasting is complete. Marl ash is obtained. At this time, the main component of marl is SiO 2 and AlPO 4 crystal powder;
[0033] (2) Dissolve 5.0g of marl in 62.5 mL of 0.8 mol / L NaOH solution, add 2.4g of NaAlO 2 , and mix well to obtain a reaction mixture, the molar ratio of Si and Al in the reaction mixture is 1:0.8, the solid-to-liquid ratio is 0.08 (the mass ratio of the marl ash to the NaOH solution is 0.08), and the microwave hydrothermal synthesis instrument (microwave The wavelength is 12.2 cm, the frequency is 2450 MHz), and the temperature is raised to 90 ° C (upper limit 1.2 MPa) in 10 min, and the reaction is maintained for 1.2 h to obtain a reaction mixture, which is taken out and stirred in a 65 ° C water bath f...
Embodiment 3
[0036] (1) Smash and dry the sludge from the waterworks, then grind it into powder and spread it in a large porcelain boat, and bake it at 850°C for 0.8h. The inner and outer layers of the sludge are pottery red, indicating that the roasting is complete Marl ash is obtained. At this time, the main component of marl is SiO 2 and AlPO 4 crystal powder;
[0037] (2) Dissolve 6.0g of marl in 50 mL of 1.2 mol / L NaOH solution, add 3.6g of NaAlO 2 , and mix well to obtain the reaction mixture, the molar ratio of Si and Al in the reaction mixture is 1:1, the solid-liquid ratio is 0.12 (the mass ratio of mud ash to NaOH solution is 0.12), and the microwave hydrothermal synthesizer (microwave The wavelength is 12.2 cm, the frequency is 2450 MHz), and the temperature is raised to 110°C (upper limit: 1.2 MPa) in 10 minutes, and the reaction is maintained for 0.8h to obtain a reaction mixture. Take out the reaction mixture and stir it in a 55°C water bath for 1.2h, and let it stand Agin...
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