Sludge dewatering technique
A process method and sludge dewatering technology, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of equipment corrosion, complexity, and difficulty in industrial application, and achieve the reagent addition amount. Less, the effect of simple process
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Embodiment 1
[0035] In this example, the cationic surfactant is CTAB, the addition amount is 10% of the sludge dry basis, the addition amount of methanol is 15 times of the sludge dry basis, and the hydrothermal treatment temperature is 180°C.
[0036] A process for sludge dewatering, comprising the following steps:
[0037] (1) Weigh the sludge with a solid content of 3% to be treated, calculate the dry weight of the sludge, add cationic surfactant in proportion, stir at 100 rpm for 30 minutes, and obtain sludge treatment A after stirring evenly.
[0038] (1) Add methanol in proportion to the treated sludge A after the treatment in (1), stir at 100 rpm for 30 min, and stir evenly to obtain sludge treated B.
[0039] (1) Raise the temperature of the treated sludge B from (2) to 180°C at 10°C / min, keep the temperature for 30min and then cool down naturally, the pH of the sludge is 6.9, and the treated sludge is obtained.
[0040] (1) Let the sludge treated in (3) stand still for 1 hour.
...
Embodiment 2
[0044] In this example, the cationic surfactant is CTAC, the addition amount is 15% of the sludge dry basis, the addition amount of methanol is 10 times of the sludge dry basis, and the hydrothermal treatment temperature is 170°C.
[0045] A process for sludge dewatering, comprising the following steps:
[0046](1) Weigh the sludge with a solid content of 2.8% to be treated, calculate the dry weight of the sludge, add cationic surfactant CTAC according to the proportion, stir at 100rpm for 30min, and obtain the sludge treatment A after stirring evenly.
[0047] (2) Add methanol in proportion to the treated sludge A after the treatment in (1), stir at 100 rpm for 30 min, and stir evenly to obtain sludge treated B.
[0048] (3) Raise the temperature of the treated sludge B from (2) to 170° C. at 10° C. / min, keep the temperature for 30 minutes and then cool down naturally. The pH of the sludge is 7.0, and the treated sludge is obtained.
[0049] (4) Rest the sludge treated in (3...
Embodiment 3
[0053] A process for sludge dewatering, comprising the following steps:
[0054] (1) Take by weighing the sludge with a solid content rate of 3% to be treated, and calculate the dry weight of the sludge;
[0055] In the sludge to be treated, add cationic surfactant N-acetonyl pyridinium chloride, stir with 50rpm for 60min, after stirring evenly, obtain sludge treatment product A; wherein, the addition of N-acetonyl pyridinium chloride is 2% of the dry mass of mud;
[0056] (2) In the sludge treatment A, add methanol, stir with 100rpm for 30min, stir evenly, and obtain the sludge treatment B; wherein, the addition of methanol is 10 times of the dry weight of the sludge;
[0057] (3) After the sludge treatment material B was stirred at a constant temperature for 30 minutes at room temperature, the pH of the sludge was 6.7, and the treated sludge was obtained;
[0058] (4) Settling the treated sludge statically for 1 hour, after stratification, performing mechanical dehydration...
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