A method for advanced treatment of tea bag filter paper papermaking white water using nanofiltration membrane
A technology for advanced treatment and white water for papermaking, which is applied in chemical instruments and methods, processing wastewater treatment, and multi-stage water/sewage treatment. To achieve the effect of reducing the consumption of clean water, reducing the total amount, and improving the purification efficiency
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Embodiment 1
[0019] 1) Filter the softwood pulp tea bag filter paper papermaking white water through a 100-mesh inclined sieve with an installation angle of 38 degrees to obtain pre-filtered white water with a solid particle size of less than or equal to 0.15 mm;
[0020] 2) Add 0.4mg / L polyaluminum chloride to the pre-filtered white water obtained in step 1), stir rapidly for 6 minutes, then add 0.15mg / L polyacrylamide, stir rapidly for 10 minutes, settle for 20 minutes, perform solid-liquid separation and take the supernatant liquid, which is the effluent of flocculation and sedimentation treatment;
[0021] 3) Pass the flocculation and sedimentation treatment effluent obtained in step 2) into the fiber ball filter (filter layer thickness 1400mm), control the filtration pressure 0.5MPa, filtration speed 40m / h, and effluent flow rate 180m 3 / h, carry out solid-liquid separation and get the supernatant liquid, which is the fibrous ball filtration treatment effluent;
[0022] 4) Pass the f...
Embodiment 2
[0024] 1) Filter the hardwood pulp tea bag filter paper papermaking white water through a 100-mesh inclined sieve with an installation angle of 38 degrees to obtain pre-filtered white water with a solid particle size of less than or equal to 0.15 mm;
[0025] 2) Add 0.3mg / L polyaluminum chloride to the pre-filtered white water obtained in step 1), stir rapidly for 4 minutes, then add 0.1mg / L polyacrylamide, stir rapidly for 7 minutes, settle for 15 minutes, and separate the solid and liquid to take the supernatant liquid, which is the effluent of flocculation and sedimentation treatment;
[0026] 3) Pass the flocculation and sedimentation treatment effluent obtained in step 2) into the fiber ball filter (filter layer thickness 1400mm), control the filtration pressure 0.4MPa, filtration speed 30m / h, and effluent flow rate 160m 3 / h, carry out solid-liquid separation and get the supernatant liquid, which is the fibrous ball filtration treatment effluent;
[0027] 4) Pass the fi...
Embodiment 3
[0029]1) Filter the 1:1 mixed pulp tea bag filter paper papermaking white water through a 100-mesh inclined sieve with an installation angle of 38 degrees to obtain pre-filtered white water with a solid particle size less than or equal to 0.15mm;
[0030] 2) Add 0.4mg / L polyaluminum chloride to the pre-filtered white water obtained in step 1), stir rapidly for 6 minutes, then add 0.15mg / L polyacrylamide, stir rapidly for 10 minutes, settle for 20 minutes, perform solid-liquid separation and take the supernatant liquid, which is the effluent of flocculation and sedimentation treatment;
[0031] 3) Pass the flocculation and sedimentation treatment effluent obtained in step 2) into the fiber ball filter (filter layer thickness 1400mm), control the filtration pressure 0.5MPa, filtration speed 40m / h, and effluent flow rate 180m 3 / h, carry out solid-liquid separation and get the supernatant liquid, which is the fibrous ball filtration treatment effluent;
[0032] 4) Pass the fibro...
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