Sludge dewatering conditioning agent and deep dewatering method thereof
A sludge dewatering and deep dewatering technology, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of unfavorable sludge resource utilization and high cost of sludge drying treatment, and achieve shortened settling time, low cost and high efficiency. The effect of the application foreground
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Embodiment 1
[0016] 1) Take the sludge from Xiangtan Sewage Treatment Plant, which has a water content of 98%, and then add the semi-coke product obtained by pyrolysis of Shaanxi coal at 650°C for 1.0 h. The particle size of the semi-coke is 0.045 mm-0.425 mm. 2% of the weight of the water-containing sludge, fully stirred for 10 minutes;
[0017] 2) Then add polyacrylamide, the dosage of polyacrylamide is 0.0001% of the weight of the water-containing sludge, and stir for 10 minutes.
[0018] 3) After the conditioned sludge is left in the sedimentation tank for 15 minutes, the concentrated sludge is drawn from the bottom of the sedimentation tank, introduced into a plate and frame filter press for dehydration, and kept at a pressure of 0.8 MPa for 20 minutes;
[0019] 4) Release the pressure and discharge the material.
[0020] The moisture content of the mud cake after dehydration is 49.8%.
Embodiment 2
[0022] 1) Take the sludge from Xiangtan Sewage Treatment Plant, which has a water content of 98%, and then add the semi-coke product obtained by pyrolysis of Shaanxi coal at 650°C for 1.0 h. The particle size of the semi-coke is 0.045 mm-0.425 mm. 2% of the weight of the water-containing sludge, fully stirred for 10 minutes;
[0023] 2) Then add polyacrylamide, the dosage of polyacrylamide is 0.0002% of the weight of aqueous sludge, and stir for 10 min.
[0024] 3) After the conditioned sludge is left in the sedimentation tank for 20 minutes, the concentrated sludge is drawn from the bottom of the sedimentation tank, introduced into a plate and frame filter press for dehydration, and kept at a pressure of 2.0 MPa for 20 minutes;
[0025] 4) Release the pressure and discharge the material.
[0026] The moisture content of the mud cake after dehydration is 49.2%.
Embodiment 3
[0028] 1) Take the sludge from Xiangtan Sewage Treatment Plant, which has a water content of 98%, and then add the semi-coke product obtained by pyrolysis of Shaanxi coal at 650°C for 1.0h. The particle size of the semi-coke is 0.045mm-0.425mm. 3% of the weight of the water-containing sludge, fully stirred for 15 minutes;
[0029] 2) Then add polyacrylamide, the dosage of polyacrylamide is 0.0003% of the weight of aqueous sludge, and stir for 10 minutes.
[0030] 3) After the conditioned sludge is allowed to stand in the sedimentation tank for 20 minutes, the concentrated sludge is drawn out from the bottom of the sedimentation tank, introduced into a plate and frame filter press for dehydration, and kept at a pressure of 3.0 MPa for 30 minutes;
[0031] 4) Release the pressure and discharge the material.
[0032] The moisture content of the mud cake after dehydration is 45.9%.
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