Composite conditioner for plate-and-frame filter pressed sludge dewatering and preparation technology

[0025]Example 1: A composite conditioner for the dehydration of plate and frame filter press sludge, comprising the following raw materials in parts by weight: 15 parts of oxidant, 20 parts of chitosan, 30 parts of zeolite powder, 25 parts of inorganic flocculant Parts, 80 parts of deionized water, 25 parts of inorganic high-priced cationic coagulant, 25 parts of quicklime, 30 parts of inorganic powder fine aggregate; add the inorganic flocculant and inorganic high-priced cationic coagulant according to the ratio into deionized water and mix uniformly , Inorganic flocculant can strongly adsorb colloidal particles, through adsorption, bridge, cross-linking, so as to agglomerate the colloid, inorganic high-valent cation coagulant, improve the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of the colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from repulsion to attracting, destroying the stability of the micelles, and causing the colloidal particles to collide with each other to form Flocculent coagulation sedimentation; add zeolite powder to the obtained mixed solution at 30°C at a speed of 400r/min and stir for 24 hours to obtain a mixed solution. Zeolite powder can purify the water quality, alleviate the water transfer phenomenon, and also improve the adhesion Improve the adsorption of the sludge conditioner; add the inorganic powder fine aggregate to the mixed solution obtained at 30°C at a speed of 400r/min, stir for 24 hours to obtain the mixed solution, and form a hard net in the sludge The lattice framework maintains a porous structure even under high pressure, so it effectively solves the problem of the compressibility of organic matter in the sludge and improves the dewatering performance of the sludge. The oxidant and chitosan are slowly added to the resulting mixture, At ℃, the speed is 400r/min, stirring for 24 hours, the product has high viscosity and good quality by using chitosan. It is used in activated sludge treatment with excellent effect. And because it is non-toxic and biodegradable, it is used For waste water treatment and metal extraction, it will not cause secondary pollution. Through oxidative cracking, the loose extracellular polymer will be destroyed and released, and the interfacial tension and adhesion between solid and liquid will be reduced. At the same time, based on the theory of sludge conditioning framework, The loose sludge conditioner of small particle size destroys the agglomeration structure of the bound extracellular polymer through dispersion and hydrophilic adsorption, and builds a skeleton seepage channel inside the sludge, so that the bound water is partially released, and the bound water, The interstitial water is transformed into free water, which accelerates and promotes the removal of water. Through the interaction of chitosan and zeolite powder, it can effectively adsorb the cations and organic pollutants in the sludge, which is convenient for the recycling of the filtrate. At the same time, the oxidant is added to improve the sludge. The acidic environment avoids the dissolution of extracellular polymers that form sludge flocs, thereby facilitating the dewatering of the sludge; add quicklime slowly to the resulting mixture, and stir for 24 hours at a speed of 400r/min at 20°C. Creating alkaline conditions can significantly improve the degree of dehydration; centrifuge the resulting mixture to obtain a precipitate, wash the precipitate with deionized water twice, and then vacuum dry for 1.5 hours at 45°C with a vacuum of 0.7 MPa. An efficient compound conditioner for sludge dewatering is obtained.

[0026]Example 2: A composite conditioner for the dehydration of plate and frame filter press sludge, including the following raw materials in parts by weight: 20 parts of oxidant, 25 parts of chitosan, 35 parts of zeolite powder, and 30 parts of inorganic flocculant , 90 parts of deionized water, 37 parts of inorganic high-valent cationic coagulant, 27 parts of quicklime, 35 parts of inorganic powder fine aggregate; add the inorganic flocculant and inorganic high-valent cationic coagulant according to the ratio into deionized water and mix uniformly, Inorganic flocculants can strongly adsorb colloidal particles, through adsorption, bridges, and cross-linking, so that the colloids are coagulated, and inorganic high-valent cation coagulants can increase the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of the colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from repulsion to attracting, destroying the stability of the micelles, and causing the colloidal particles to collide with each other to form Flocculent coagulation sedimentation; add zeolite powder to the obtained mixed solution at 35℃ at a rotation speed of 500r/min and stir for 27 hours to obtain the mixed solution. The zeolite powder can purify the water quality, alleviate the water transfer phenomenon, and also improve the adhesion It improves the adsorption effect of the sludge conditioner; adding inorganic powder fine aggregate to the mixed solution obtained at 35℃ at a speed of 500r/min, stirring for 27 hours to obtain the mixed solution, forming a hard net in the sludge The lattice framework maintains a porous structure even under high pressure, which effectively solves the problem of the compressibility of organic matter in the sludge and improves the dewatering performance of the sludge; slowly add the oxidant and chitosan to the resulting mixed liquid, At ℃, the rotation speed is 500r/min, stirring for 32 hours, the product has high viscosity and good quality by using chitosan. It is used for activated sludge treatment with excellent effect. And because it is non-toxic and biodegradable, it is used For waste water treatment and metal extraction, it will not cause secondary pollution. Through oxidative cracking, the loose extracellular polymer will be destroyed and released, and the interfacial tension and adhesion between solid and liquid will be reduced. At the same time, based on the theory of sludge conditioning framework, The loose sludge conditioner of small particle size destroys the agglomeration structure of the bound extracellular polymer through dispersion and hydrophilic adsorption, and builds a skeleton seepage channel inside the sludge, so that the bound water is partially released, and the bound water, The interstitial water is transformed into free water, which accelerates and promotes the removal of water. Through the interaction of chitosan and zeolite powder, it can effectively adsorb the cations and organic pollutants in the sludge, which is convenient for the recycling of the filtrate. At the same time, the oxidant is added to improve the sludge. The acidic environment avoids the dissolution of extracellular polymers that form sludge flocs, thereby facilitating the dewatering of sludge; add quicklime slowly to the resulting mixture, and stir for 27 hours at a speed of 500r/min at 25°C. Creating alkaline conditions can significantly increase the degree of dehydration; centrifuge the resulting mixture to obtain a precipitate, wash the precipitate with deionized water 3 times, and then vacuum dry for 2.5 hours at a vacuum of 0.9MPa at 50°C. A high-efficiency composite conditioner for sludge dewatering is obtained.

[0027]Example 3: A composite conditioner for the dehydration of plate and frame filter press sludge, comprising the following raw materials in parts by weight: 25 parts of oxidant, 30 parts of chitosan, 40 parts of zeolite powder, 45 parts of inorganic flocculant , 100 parts of deionized water, 40 parts of inorganic high-priced cationic coagulant, 30 parts of quicklime, 40 parts of inorganic powder fine aggregate; add the inorganic flocculant and inorganic high-priced cationic coagulant according to the ratio into deionized water and mix uniformly, Inorganic flocculants can strongly adsorb colloidal particles, through adsorption, bridges, and cross-linking, so that the colloids are coagulated, and inorganic high-valent cation coagulants can increase the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of the colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from repulsion to attracting, destroying the stability of the micelles, and causing the colloidal particles to collide with each other to form Flocculent coagulation sedimentation; add zeolite powder to the obtained mixed solution at 40℃ at a rotation speed of 600r/min and stir for 30 hours to obtain the mixed solution. The zeolite powder can purify the water quality, alleviate the water transfer phenomenon, and also improve the adhesion It improves the adsorption effect of the sludge conditioner; add the inorganic powder fine aggregate to the obtained mixed solution at 40℃ and stir at 600r/min for 30 hours to obtain the mixed solution, forming a hard net in the sludge The lattice framework maintains a porous structure even under high pressure, which effectively solves the problem of the compressibility of organic matter in the sludge and improves the dewatering performance of the sludge; slowly add the oxidant and chitosan to the resulting mixed liquid, At ℃, the rotation speed is 600r/min, stirring for 40 hours, through the use of chitosan to make the product high viscosity, good quality, used in activated sludge treatment, the effect is very good, and because it is non-toxic, biodegradable, use it For waste water treatment and metal extraction, it will not cause secondary pollution. Through oxidative cracking, the loose extracellular polymer will be destroyed and released, and the interfacial tension and adhesion between solid and liquid will be reduced. At the same time, based on the theory of sludge conditioning framework, The loose sludge conditioner of small particle size destroys the agglomeration structure of the bound extracellular polymer through dispersion and hydrophilic adsorption, and builds a skeleton seepage channel inside the sludge, so that the bound water is partially released, and the bound water, The interstitial water is transformed into free water, which accelerates and promotes the removal of water. Through the interaction of chitosan and zeolite powder, it can effectively adsorb the cations and organic pollutants in the sludge, which is convenient for the recycling of the filtrate. At the same time, the oxidant is added to improve the sludge. The acidic environment avoids the dissolution of extracellular polymers that form sludge flocs, thereby facilitating the dewatering of sludge; add quicklime slowly to the resulting mixture, and stir for 40 hours at a rotational speed of 600r/min at 30°C. Creating alkaline conditions can significantly improve the degree of dehydration; centrifuge the resulting mixture to obtain a precipitate, wash the precipitate with deionized water 3 times, and then vacuum dry for 3.5 hours at 55°C with a vacuum of 1.1 MPa. A high-efficiency composite conditioner for sludge dewatering is obtained.

[0028]To sum up: the effect in Example 2 is the best, through 20 parts of oxidant, 25 parts of chitosan, 35 parts of zeolite powder, 30 parts of inorganic flocculant, 90 parts of deionized water, and 37 parts of inorganic high-valent cation coagulant , Quicklime 27 parts, inorganic powder fine aggregate 35 parts; the inorganic flocculant and inorganic high-priced cationic coagulant are added to deionized water according to Billy and mixed evenly. The inorganic flocculant can strongly adsorb colloidal particles, and through adsorption, bridge, cross Combined effect, so as to make the colloid coagulate, inorganic high-valent cationic coagulant, improve the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of the colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from repulsion to attracting, destroying the stability of the micelles, and causing the colloidal particles to collide with each other to form Flocculent coagulation sedimentation; add zeolite powder to the obtained mixed solution at 35℃ at a rotation speed of 500r/min and stir for 27 hours to obtain the mixed solution. The zeolite powder can purify the water quality, alleviate the water transfer phenomenon, and also improve the adhesion It improves the adsorption effect of the sludge conditioner; adding inorganic powder fine aggregate to the mixed solution obtained at 35℃ at a speed of 500r/min, stirring for 27 hours to obtain the mixed solution, forming a hard net in the sludge The lattice framework maintains a porous structure even under high pressure, which effectively solves the problem of the compressibility of organic matter in the sludge and improves the dewatering performance of the sludge; slowly add the oxidant and chitosan to the resulting mixed liquid, At ℃, the rotation speed is 500r/min, stirring for 32 hours, the product has high viscosity and good quality by using chitosan. It is used for activated sludge treatment with excellent effect. And because it is non-toxic and biodegradable, it is used For waste water treatment and metal extraction, it will not cause secondary pollution. Through oxidative cracking, the loose extracellular polymer will be destroyed and released, and the interfacial tension and adhesion between solid and liquid will be reduced. At the same time, based on the theory of sludge conditioning framework, The loose sludge conditioner of small particle size destroys the agglomeration structure of the bound extracellular polymer through dispersion and hydrophilic adsorption, and builds a skeleton seepage channel inside the sludge, so that the bound water is partially released, and the bound water, The interstitial water is transformed into free water, which accelerates and promotes the removal of water. Through the interaction of chitosan and zeolite powder, it can effectively adsorb the cations and organic pollutants in the sludge, which is convenient for the recycling of the filtrate. At the same time, the oxidant is added to improve the sludge. The acidic environment avoids the dissolution of extracellular polymers that form sludge flocs, thereby facilitating the dewatering of sludge; add quicklime slowly to the resulting mixture, and stir for 27 hours at a speed of 500r/min at 25°C. Creating alkaline conditions can significantly increase the degree of dehydration; centrifuge the resulting mixture to obtain a precipitate, wash the precipitate with deionized water 3 times, and then vacuum dry for 2.5 hours at a vacuum of 0.9MPa at 50°C. Obtain a high-efficiency compound conditioner for sludge dewatering;