A preparation method of a chitosan phosphorus-removing material and the chitosan phosphorus-removing material
A technology of chitosan and metal salts, applied in chemical instruments and methods, control of water treatment parameters, and other chemical processes, can solve the problems of cumbersome preparation process and large consumption of acid and alkali solution, and achieve abundant sources and low manufacturing cost , The effect of the source is easily biodegradable
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Embodiment 1
[0047] Get 50g particle diameter and be 1mm, deacetylation degree 90%, the chitosan that viscosity-average molecular weight is 100000, join in 10L aqueous solution, after making it form suspension with the speed stirring of 60 rev / mins, add 41g Fe(NO 3 ) 3 , 26g MnSO 4 , 94g Al(NO 3 ) 3 , after stirring evenly, use spray drying technology to dry to obtain adsorption and phosphorus removal materials. The spray drying conditions are as follows: inlet air temperature 150°C, outlet air temperature 80°C, drying time 1.5S, maximum water evaporation 8Kg / h, peristaltic pump feed 2L / h, dry air flow rate 1.5m 3 / min, spray gas flow rate 0.5m 3 / h, the nozzle diameter is 2mm, and the recovery rate of dry powder is 95%.
Embodiment 2
[0049] Weigh 41g Fe(NO 3 ) 3 , 26g MnSO 4 , 94g Al(NO 3 ) 3 , added to 16L of water, stirred at a speed of 50 rpm to dissolve it, then added 50g of chitosan with a particle size of 1mm, a degree of deacetylation of 90%, and a viscosity-average molecular weight of 300,000. Technical drying to obtain adsorption and phosphorus removal materials. The spray drying conditions are as follows: inlet air temperature 200°C, outlet air temperature 100°C, drying time 1.5S, maximum water evaporation 8Kg / h, peristaltic pump feed 2L / h, drying air flow 1.5m 3 / min, spray gas flow rate 0.5m 3 / h, the nozzle diameter is 2mm, and the recovery rate of dry powder is 95%.
Embodiment 3
[0051] Get 30g of chitosan whose particle size is 3mm, degree of deacetylation 80%, viscosity average molecular weight is 250000, join in 8L aqueous solution, after stirring at a speed of 30 rpm to form a suspension, add 54g FeCl 3 , 59.4g MnCl 2 , 51.3g Al 2 (SO 4 ) 3 , after stirring evenly, use spray drying technology to dry to obtain adsorption and phosphorus removal materials. The spray drying conditions are as follows: inlet air temperature 100°C, outlet air temperature 50°C, drying time 1S, maximum water evaporation 10Kg / h, peristaltic pump feed 2L / h, dry air flow 1m 3 / min, spray gas flow rate 0.2m 3 / h, the nozzle diameter is 3mm, and the recovery rate of dry powder is 95%.
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