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

A technology of sludge dehydration and plate-and-frame filtration, which is applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve problems such as low efficiency, and achieve improved efficiency, excellent effect, and high viscosity high effect

Pending Publication Date: 2021-01-19
德州万达环保科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a composite conditioner and pre...
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Method used

Embodiment one: a kind of composite conditioner for plate and frame filter press sludge dehydration, comprises the raw material of following parts by weight proportioning: 15 parts in oxidant, 20 parts in chitosan, 30 parts in zeolite powder, inorganic 25 parts of flocculant, 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 inorganic flocculant and inorganic high-priced cationic coagulant to deionized Evenly mixed in water, the inorganic flocculant can strongly adsorb colloidal particles, through adsorption, bridging, and cross-linking, so that the colloids can be coagulated, and the inorganic high-priced cationic coagulant can increase the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from mutual repulsion to mutual attraction, destroying the stability of the micelles, causing the colloidal particles to collide with each other, thus forming Flocculant coagulation and precipitation; add zeolite powder to the obtained mixed solution at 30°C at a speed of 400r/min, stir for 24 hours to obtain a mixed solution, zeolite powder can purify water quality, relieve water transfer phenomenon, and also improve adhesion It improves the adsorption of the sludge conditioner; add the inorganic powder fine aggregate to the mixed solution obtained at 30°C with a rotation speed of 400r/min, stir for 24 hours to obtain the mixed solution, and form a hard network in the sludge Even under high pressure, it still maintains a porous structure, so it effectively solves the problem of the compressibility of organic matter in sludge and improves the dewatering performance of sludge; slowly add oxidant and chitosan to the obtained mixed solution, at 20 Stir at 400r/min at ℃ for 24 hours. By using chitosan, the product has high viscosity and good quality. It is used for activated sludge treatment with excellent effect. Because it is non-toxic and biodegradable, it can be used as For wastewater treatment and metal extraction, it will not cause secondary pollution, and the loose extracellular polymer will be destroyed and released through oxidative cracking, reducing the interfacial tension and adhesion between solid and liquid; at the same time, based on the sludge conditioning skeleton theory, The loose sludge conditioner with small particle size destroys the aggregate structure of the combined 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, Interstitial water is transformed into free water, which accelerates and promotes the release of water. Through the interaction between chitosan and zeolite powder, the cations and organic pollutants in the sludge are effectively adsorbed, which facilitates the recycling of the filtrate; at the same time, adding an oxidant to improve the sludge acidic environment, avoiding the dissolution of extracellular polymers that form sludge flocs, which is beneficial to the dehydration of sludge; slowly add quicklime to the obtained mixed solution, and stir at 20°C at a speed of 400r/min for 24 hours. Create alkaline conditions, which can significantly improve the degree of dehydration; centrifuge the obtained mixed solution to obtain a precipitate, wash the precipitate with deionized water twice, and then vacuum dry it for 1.5 hours at 45°C under a vacuum of 0.7MPa. A high-efficiency composite conditioner for sludge dewatering is obtained.
Embodiment three: a kind of composite conditioning agent for plate and frame filter press sludge dehydration, comprises the raw material of following parts by weight proportioning: 25 parts in oxidant, 30 parts in chitosan, 40 parts in zeolite powder, inorganic flocculation 45 parts of agent, 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 inorganic flocculant and inorganic high-priced cationic coagulant to deionized water according to the ratio Evenly mixed, the inorganic flocculant can strongly adsorb colloidal particles, through adsorption, bridging, and cross-linking, so that the colloids can be aggregated, and the inorganic high-priced cationic coagulant can increase the dehydration speed. At the same time, physical and chemical changes occur, neutralizing the charge on the surface of colloidal particles and suspended matter, reducing the potential, making the colloidal particles change from mutual repulsion to mutual attraction, destroying the stability of the micelles, causing the colloidal particles to collide with each other, thus forming Flocculant coagulation and precipitation; add zeolite powder to the obtained mixed solution at 40°C at a speed of 600r/min, stir for 30 hours to obtain a mixed solution, zeolite powder can purify water quality, relieve water transfer phenomenon, and also improve adhesion It improves the adsorption of the sludge conditioner; add the inorganic powder fine aggregate to the mixed solution obtained at 40°C with a rotation speed of 600r/min, stir for 30 hours to obtain the mixed solution, and form a hard network in the sludge Even under high pressure, it still maintains a porous structure, so it 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 obtained mixed solution, at 30 Under the temperature of 600r/min, stirring for 40 hours, the product has high viscosity and good quality by using chitosan, which is used for activated sludge treatment with excellent effect, and because it is non-toxic and biodegradable, it can be used as For wastewater treatment and metal extraction, it will not cause secondary pollution, and the loose extracellular polymer will be destroyed and released through oxidative cracking, reducing the interfacial tension and adhesion between solid and liquid; at the same time, based on the sludge conditioning skeleton theory, The loose sludge conditioner with small particle size destroys the aggregate structure of the combined 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, Interstitial water is transformed into free water, which accelerates and promotes the release of water. Through the interaction between chitosan and zeolite powder, the cations and organic pollutants in the sludge are effectively adsorbed, which facilitates the recycling of the filtrate; at the same time, adding an oxidant to improve the sludge acidic environment, avoiding the dissolution of extracellular polymers that form sludge flocs, which is conducive to the dehydration of sludge; slowly add quicklime to the obtained mixed solution, stir at 30°C at a speed of 600r/min for 40 hours, Create alkaline conditions, which can significantly improve the degree of dehydration; centrifuge the obtained mixture to obtain a precipitate, wash the precipitate with deionized water 3 times, and then dry it in vacuum for 3.5 hours at 55°C under a vacuum of 1.1MPa. A high-eff...
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Abstract

The invention discloses a composite conditioner for plate-and-frame filter pressed sludge dewatering, which comprises the following raw materials in parts by weight: 15-25 parts of an oxidant, 20-30 parts of chitosan, 30-40 parts of zeolite powder, 25-45 parts of an inorganic flocculant, 80-100 parts of deionized water, 25-40 parts of an inorganic high-valence cation coagulant, 25-30 parts of quicklime and 30-40 parts of inorganic powder fine aggregate; wherein the oxidant is one or more of sodium ferrate, potassium ferrate, sodium percarbonate, sodium hypochlorite, chlorine, sodium dichromate, potassium dichromate, potassium permanganate and nitric acid. Colloid particles can be strongly adsorbed through the inorganic flocculant, and colloid is condensed through adsorption, bridging and cross-linking effects. According to the composite conditioner for plate-and-frame filter pressed sludge dewatering and the preparation technology, physical and chemical changes occur at the same time,charges on the surfaces of colloidal particles and suspended solids are neutralized, the potential is reduced, the colloidal particles are changed from original repulsion to attraction, and the micelle stability is destroyed.

Application Domain

Technology Topic

Sodium acid carbonatePotassium manganate +19

Examples

  • Experimental program(3)

Example Embodiment

[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.

Example Embodiment

[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.

Example Embodiment

[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;
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