Method for preparing amphiprotic sludge dehydrant
A kind of sludge dehydrating agent, amphoteric technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve environmental pollution and other problems, achieve good treatment effect, stable reaction process and short time
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Embodiment 1
[0018] In the reactor, add 499kg of fresh water, start stirring, and add 1.1kg of nonionic polyacrylamide. After complete dissolution, add 0.1 kg of sodium hydroxide (chemically pure) to adjust the pH of the solution to 11-12. Then add 0.5g of disodium edetate (chemically pure), control the reaction temperature at 30°C, add 1200mL of formaldehyde (chemically pure), 1200mL of dimethylamine (chemically pure), and 0.73kg of sodium bisulfite into the reaction kettle , the reaction time is 4h. Finally, add 1500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-1.
Embodiment 2
[0020] In the reactor, add 498kg of fresh water, start stirring, and add 1.35kg of nonionic polyacrylamide. After completely dissolving, add 0.17kg of sodium hydroxide (chemically pure) to adjust the pH value of the solution to 9-10. Then add 0.5g of disodium edetate (chemically pure), control the reaction temperature at 50°C, add 2200mL of formaldehyde (chemically pure), 1800mL of dimethylamine (chemically pure), and 0.41kg of sodium bisulfite into the reaction kettle , the reaction time is 3h. Finally, add 2500mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-2.
Embodiment 3
[0022] In the reactor, add 987kg of fresh water, start stirring, and add 2.85kg of anionic polyacrylamide. After completely dissolving, add 0.25kg sodium hydroxide (chemically pure) to adjust the pH value of the solution to 11-12. Then add 0.4g of disodium edetate (chemically pure), control the reaction temperature at 45°C, add 2500mL of formaldehyde (chemically pure), 2800mL of dimethylamine (chemically pure), and 1.62kg of sodium bisulfite into the reaction kettle , the reaction time is 3h. Finally, add 4000mL hydrochloric acid (chemically pure) to stop the reaction, and this product can be obtained. Dehydrating agent-3.
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