Treatment method and treatment device of discharge water of cooling water
A treatment device and treatment method technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve problems such as difficult cleaning and blockage, and achieve the purpose of suppressing flux reduction, long-term continuous stability and effective Effect of treatment
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[0114] Hereinafter, the present invention will be described more specifically by giving examples, reference examples, and comparative examples.
[0115] [evaluation sample]
[0116] In the following examples, reference examples, and comparative examples, the following evaluation sample waters 1 and 2 were used as raw water to be treated.
[0117]
[0118] As evaluation sample water 1, the discharge water of the cooling water of A petrochemical complex plant was collected.
[0119] The cooling water treatment of this factory is treated with non-phosphorus polymer-based dispersant and the concentration factor is 4 times. The water quality of the collected cooling water discharge water is shown in Table 1.
[0120]
[0121] As evaluation sample water 2, the discharge water of the cooling water of Plant B of the Petroleum Complex was collected.
[0122] The cooling water treatment of this factory is treated with non-phosphorus polymer-based dispersant and the concentration f...
Embodiment 10、12~14
[0180] Set the maximum turbidity increase of the cationic organic coagulant to 100%, and set the addition amount of the cationic organic coagulant with an intrinsic viscosity of 0.5dL / g or less so that the turbidity increase rate becomes 50-90%. When 10 to 30 ppm, preferably 20 ppm of PAC is added, the SDI conversion value of filtered water is 3.50 to 4.76, which is judged to be substantially good.
[0181] When the turbidity increase rate is about 70%, the addition amount of the cationic organic coagulant shows the best results, and the effect decreases when the turbidity increase rate is close to 50% and close to 90%.
[0182] The cationic organic coagulant having a larger turbidity increase tends to have a larger absolute effect.
[0183] (4) Comparative examples 1-3, 5-9
[0184] Based on the addition of cationic organic coagulants whose turbidity increase rate is less than 50% and more than 90%, the fouling of the reverse osmosis membrane will be increased. When the tur...
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