CN108557943B - Special water purifying agent for wastewater treatment and preparation method thereof - Google Patents
Special water purifying agent for wastewater treatment and preparation method thereof Download PDFInfo
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- CN108557943B CN108557943B CN201810336107.1A CN201810336107A CN108557943B CN 108557943 B CN108557943 B CN 108557943B CN 201810336107 A CN201810336107 A CN 201810336107A CN 108557943 B CN108557943 B CN 108557943B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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Abstract
The invention discloses a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 10-20 parts of bentonite, 15-25 parts of kaolin, 8-14 parts of modified attapulgite, 6-12 parts of aluminum hydroxide, 5-10 parts of sodium hydroxide solution, 6-11 parts of hydrochloric acid, 7-13 parts of activated fly ash, 3-7 parts of calcium carbonate, 2-5 parts of alum, 3-8 parts of Chinese yam, 5-9 parts of activated carbon, 0.2-0.6 part of hydrogen peroxide, 0.3-0.7 part of pore-forming agent, 1-2 parts of dispersing agent, 1-2 parts of bactericide and a proper amount of water; the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment; the mass fraction concentration of the sodium hydroxide solution is 30%. The special water purifying agent for wastewater treatment has the advantages of scientific and reasonable formula, good purification performance, low cost and good stability, and can be used for large-scale industrial production.
Description
Technical Field
The invention belongs to the technical field of water purifying agents, and particularly relates to a special water purifying agent for wastewater treatment and a preparation method thereof.
Background
The waste water, especially the industrial waste water, is an important factor of water resource pollution at present, so that the treatment of waste water, especially the treatment of industrial waste water, is an important subject to be solved at present, and some people adopt water purifying agents to treat the waste water and obtain certain effects.
The aluminum and iron high molecular inorganic polymer water purifying agent is a novel chemical industry researched and developed from seventies to ninety years, and plays a great role in improving the quality of life of people and controlling the environment. The water purifying agent has various varieties and different production processes. However, in the prior art, no oxidant is added in the production process of the water purifying agent, ferrous iron can not be converted into ferric iron, the polymerization effect can not be achieved, solid and liquid can not be separated, the water insoluble substance is too high, the water purifying effect is influenced, and the industrial production is not realized.
In view of the above, the conventional water purifying agent has many disadvantages, and thus a better water purifying agent is required to improve the disadvantages of the prior art.
Disclosure of Invention
The invention provides a special water purifying agent for wastewater treatment and a preparation method thereof, which solve the problems in the background technology, and the special water purifying agent for wastewater treatment has the advantages of scientific and reasonable formula, good purification performance, low cost and good stability, and can be used for large-scale industrial production.
In order to solve the problems in the prior art, the following technical scheme is adopted:
a special water purifying agent for wastewater treatment comprises the following raw materials in parts by weight: 10-20 parts of bentonite, 15-25 parts of kaolin, 8-14 parts of modified attapulgite, 6-12 parts of aluminum hydroxide, 5-10 parts of sodium hydroxide solution, 6-11 parts of hydrochloric acid, 7-13 parts of activated fly ash, 3-7 parts of calcium carbonate, 2-5 parts of alum, 3-8 parts of Chinese yam, 5-9 parts of activated carbon, 0.2-0.6 part of hydrogen peroxide, 0.3-0.7 part of pore-forming agent, 1-2 parts of dispersing agent, 1-2 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
Preferably, the special water purifying agent for wastewater treatment comprises the following raw materials in parts by weight: 12-18 parts of bentonite, 17-24 parts of kaolin, 10-12 parts of modified attapulgite, 8-10 parts of aluminum hydroxide, 6-9 parts of sodium hydroxide solution, 8-10 parts of hydrochloric acid, 9-12 parts of activated fly ash, 4-5 parts of calcium carbonate, 3-4 parts of alum, 4-6 parts of Chinese yam, 7-8 parts of activated carbon, 0.3-0.5 part of hydrogen peroxide, 0.4-0.6 part of pore-increasing agent, 1.3-1.8 parts of dispersing agent, 1.2-1.9 parts of bactericide and a proper amount of water.
Preferably, the special water purifying agent for wastewater treatment comprises the following raw materials in parts by weight: 15 parts of bentonite, 20 parts of kaolin, 11 parts of modified attapulgite, 9 parts of aluminum hydroxide, 8 parts of sodium hydroxide solution, 9 parts of hydrochloric acid, 10 parts of activated fly ash, 4.3 parts of calcium carbonate, 3.4 parts of alum, 4.6 parts of Chinese yam, 7.2 parts of activated carbon, 0.4 part of hydrogen peroxide, 0.5 part of pore-increasing agent, 1.7 parts of dispersing agent, 1.5 parts of bactericide and a proper amount of water.
Preferably, the modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 5-10 min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 20-30 min at the temperature of 60-80 ℃, performing vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 600-800 ℃, roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
Preferably, the dispersant is any one of sodium hexametaphosphate, sodium pyrophosphate and sodium dodecyl sulfate.
Preferably, the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of the total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 60-70 ℃, keeping the temperature, stirring and reacting for 2-3 hours, filtering to obtain filter residue, putting the filter residue into an environment of 90-100 ℃, drying until the water content is lower than 8%, and crushing into powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 3-5 hours to obtain powder B;
(4) placing activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 87-93 ℃ and the reaction time to be 3-6 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain a mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersing agent into a mixer, stirring and mixing uniformly, and then putting into a ball mill for ball milling for 3-5 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Preferably, the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
Compared with the prior art, the invention has the following beneficial effects:
the special water purifying agent for wastewater treatment has scientific and reasonable formula, good purification performance, low cost and good stability, can be used for large-scale industrial production, and specifically comprises the following components:
(1) the special water purifying agent for wastewater treatment adopts bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash and the like as raw materials, has low cost, develops new applications of the bentonite, the kaolin, the attapulgite and the fly ash, and is green and environment-friendly;
(2) the special water purifying agent for wastewater treatment respectively treats bentonite, kaolin, fly ash and Chinese yam, starch contained in the Chinese yam is a macromolecular carbohydrate formed by dehydrating and polymerizing a plurality of glucose molecules, and the starch has a plurality of straight chain structures, branched chain structures and hydroxyl groups, and has strong coagulation property, and the Chinese yam and a treated product have mutual synergistic action, so that the purification effect of the water purifying agent is enhanced, in water purification flocculation, flocculating constituents are compact, sedimentation is fast, the water content of sediments is low, the purification treatment cost of wastewater can be greatly reduced, and the water purifying agent has a better effect on removing heavy metals in a water body;
(3) the kaolin is treated, and the treated kaolin and the modified attapulgite have strong adsorption capacity, are natural and environment-friendly, are harmless to the environment and are also good bactericide loading bodies, so that the water purifying agent prepared by taking the kaolin as a main raw material has good adsorption and purification performances, and the bactericide is added to achieve a good sterilization effect.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. These examples are intended to illustrate the invention and are not intended to limit the scope of the invention.
Example 1
The embodiment relates to a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 10 parts of bentonite, 15 parts of kaolin, 8 parts of modified attapulgite, 6 parts of aluminum hydroxide, 5 parts of sodium hydroxide solution, 6 parts of hydrochloric acid, 7 parts of activated fly ash, 3 parts of calcium carbonate, 2 parts of alum, 3 parts of Chinese yam, 5 parts of activated carbon, 0.2 part of hydrogen peroxide, 0.3 part of pore-increasing agent, 1 part of dispersant, 1 part of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
The modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 5min, and performing vacuum filtration;
(2) placing the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 20min at 60 ℃, carrying out vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 600 ℃, then roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
Wherein the dispersant is sodium hexametaphosphate.
Wherein the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of total weight of bentonite, aluminum hydroxide and hydrochloric acid and water in a reaction kettle, stirring and mixing uniformly, heating to 60 ℃, keeping the temperature, stirring and reacting for 2 hours, filtering to obtain filter residue, putting the filter residue in an environment of 90 ℃, drying until the water content is lower than 8%, and crushing into powder to obtain powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 3 hours to obtain powder B;
(4) placing the activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 87 ℃ and the reaction time to be 3 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersant into a mixer, stirring and mixing uniformly, and then putting the mixer into a ball mill for ball milling for 3 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Wherein the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
Example 2
The embodiment relates to a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 20 parts of bentonite, 25 parts of kaolin, 14 parts of modified attapulgite, 12 parts of aluminum hydroxide, 10 parts of sodium hydroxide solution, 11 parts of hydrochloric acid, 13 parts of activated fly ash, 7 parts of calcium carbonate, 5 parts of alum, 8 parts of Chinese yam, 9 parts of activated carbon, 0.6 part of hydrogen peroxide, 0.7 part of pore-increasing agent, 2 parts of dispersing agent, 2 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
The modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 10min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 30min at 80 ℃, carrying out vacuum filtration, and washing with distilled water until the pH value is 7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 800 ℃, then roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
Wherein the dispersant is sodium pyrophosphate.
Wherein the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 70 ℃, keeping the temperature, stirring and reacting for 3 hours, filtering to obtain filter residue, putting the filter residue into an environment at 100 ℃, drying until the water content is lower than 8%, and crushing into powder to obtain powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 5 hours to obtain powder B;
(4) placing the activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 93 ℃ and the reaction time to be 6 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersant into a mixer, stirring and mixing uniformly, and then putting the mixer into a ball mill for ball milling for 5 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Wherein the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
Example 3
The embodiment relates to a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 12 parts of bentonite, 17 parts of kaolin, 10 parts of modified attapulgite, 8 parts of aluminum hydroxide, 6 parts of sodium hydroxide solution, 8 parts of hydrochloric acid, 9 parts of activated fly ash, 4 parts of calcium carbonate, 3 parts of alum, 4 parts of Chinese yam, 7 parts of activated carbon, 0.3 part of hydrogen peroxide, 0.4 part of pore-increasing agent, 1.3 parts of dispersing agent, 1.2 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
The modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 8min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 23min at 65 ℃, carrying out vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 650 ℃, then roasting at constant temperature for 4 hours, cooling and grinding until the particle size is 200 meshes.
Wherein the dispersant is sodium pyrophosphate.
Wherein the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 62 ℃, keeping the temperature, stirring and reacting for 2.3 hours, filtering to obtain filter residue, putting the filter residue into an environment at 92 ℃ for drying until the water content is lower than 8%, and crushing into powder A to obtain powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 3.5 hours to obtain powder B;
(4) placing the activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 90 ℃ and the reaction time to be 3.5 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersant into a mixer, stirring and mixing uniformly, and then putting into a ball mill for ball milling for 3.5 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Wherein the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
Example 4
The embodiment relates to a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 18 parts of bentonite, 24 parts of kaolin, 12 parts of modified attapulgite, 10 parts of aluminum hydroxide, 9 parts of sodium hydroxide solution, 10 parts of hydrochloric acid, 12 parts of activated fly ash, 5 parts of calcium carbonate, 4 parts of alum, 6 parts of Chinese yam, 8 parts of activated carbon, 0.5 part of hydrogen peroxide, 0.6 part of pore-increasing agent, 1.8 parts of dispersing agent, 1.9 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
The modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 8min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 25min at 70 ℃, carrying out vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 700 ℃, then roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
Wherein the dispersant is sodium dodecyl sulfate.
Wherein the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 65 ℃, keeping the temperature, stirring and reacting for 2.5 hours, filtering to obtain filter residue, putting the filter residue into an environment at 95 ℃, drying until the water content is lower than 8%, and crushing into powder A to obtain powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 4 hours to obtain powder B;
(4) placing the activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 90 ℃ and the reaction time to be 4.5 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersant into a mixer, stirring and mixing uniformly, and then putting into a ball mill for ball milling for 34 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Wherein the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
Example 5
The embodiment relates to a special water purifying agent for wastewater treatment, which comprises the following raw materials in parts by weight: 15 parts of bentonite, 20 parts of kaolin, 11 parts of modified attapulgite, 9 parts of aluminum hydroxide, 8 parts of sodium hydroxide solution, 9 parts of hydrochloric acid, 10 parts of activated fly ash, 4.3 parts of calcium carbonate, 3.4 parts of alum, 4.6 parts of Chinese yam, 7.2 parts of activated carbon, 0.4 part of hydrogen peroxide, 0.5 part of pore-increasing agent, 1.7 parts of dispersing agent, 1.5 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%.
The modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 59min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 29min at 75 ℃, carrying out vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 750 ℃, then roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
Wherein the dispersant is sodium hexametaphosphate.
Wherein the pore-increasing agent is potassium bicarbonate.
A method for preparing the special water purifying agent for wastewater treatment comprises the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to the formula for later use;
(2) putting 2% of total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 68 ℃, keeping the temperature, stirring and reacting for 2.8 hours, filtering to obtain filter residue, putting the filter residue into an environment at 97 ℃, drying until the water content is lower than 8%, and crushing into powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 4.5 hours to obtain powder B;
(4) placing the activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 92 ℃ and the reaction time to be 5 hours, cooling to the normal temperature, obtaining filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersant into a mixer, stirring and mixing uniformly, and then putting into a ball mill for ball milling for 4.5 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
Wherein the amount of water used in the step (2) is 10 times of the weight of bentonite, and the amount of water added in the step (7) is 10 times of the weight of Chinese yam.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (7)
1. A special water purifying agent for wastewater treatment comprises the following raw materials in parts by weight: 10-20 parts of bentonite, 15-25 parts of kaolin, 8-14 parts of modified attapulgite, 6-12 parts of aluminum hydroxide, 5-10 parts of sodium hydroxide solution, 6-11 parts of hydrochloric acid, 7-13 parts of activated fly ash, 3-7 parts of calcium carbonate, 2-5 parts of alum, 3-8 parts of Chinese yam, 5-9 parts of activated carbon, 0.2-0.6 part of hydrogen peroxide, 0.3-0.7 part of pore-forming agent, 1-2 parts of dispersing agent, 1-2 parts of bactericide and a proper amount of water;
the activated fly ash is prepared by uniformly mixing common fly ash and potassium fluoride, and then roasting in a high-temperature environment;
the mass fraction concentration of the sodium hydroxide solution is 30 percent;
the mass fraction concentration of the hydrochloric acid is 15%;
the method is characterized by comprising the following steps:
(1) weighing bentonite, kaolin, modified attapulgite, aluminum hydroxide, sodium hydroxide solution, hydrochloric acid, activated fly ash, calcium carbonate, alum, Chinese yam, activated carbon, hydrogen peroxide, a pore-increasing agent, a dispersing agent, a bactericide and water according to a formula of a water purifying agent for later use;
(2) putting 2% of the total weight of bentonite, aluminum hydroxide and hydrochloric acid and water into a reaction kettle, stirring and mixing uniformly, heating to 60-70 ℃, keeping the temperature, stirring and reacting for 2-3 hours, filtering to obtain filter residue, putting the filter residue into an environment of 90-100 ℃, drying until the water content is lower than 8%, and crushing into powder A;
(3) crushing kaolin into powder, uniformly mixing the powder with a pore-increasing agent, and calcining the mixture in a roasting furnace for 3-5 hours to obtain powder B;
(4) placing activated fly ash into a reaction kettle, slowly adding the residual hydrochloric acid into the activated fly ash for mixing reaction, controlling the reaction temperature to be 87-93 ℃ and the reaction time to be 3-6 hours, cooling to the normal temperature, filtering to obtain filtrate a and filter residue a, adding hydrogen peroxide into the filtrate a, and stirring for reaction for 30 minutes to obtain a mixed solution A;
(5) mixing the filter residue a obtained in the step (4) with a sodium hydroxide solution, stirring for reaction, and filtering to obtain a filtrate b;
(6) stirring and mixing the mixed solution A obtained in the step (4) and the filtrate b obtained in the step (5), and placing the mixture in a polymerization reactor for polymerization reaction to obtain a polymerization reaction solution;
(7) cleaning rhizoma Dioscoreae, peeling, pulverizing, adding water, stirring, standing, and removing supernatant to obtain rhizoma Dioscoreae extract;
(8) putting the powder A obtained in the step (2), the powder B obtained in the step (3), the modified attapulgite, the calcium carbonate, the alum, the activated carbon and the dispersing agent into a mixer, stirring and mixing uniformly, and then putting into a ball mill for ball milling for 3-5 minutes to obtain mixed powder;
(9) and (3) uniformly stirring and mixing the polymerization reaction liquid obtained in the step (6), the Chinese yam extract obtained in the step (7), the mixed powder obtained in the step (8) and a bactericide to obtain the special water purifying agent for wastewater treatment.
2. The special water purifying agent for wastewater treatment according to claim 1, which comprises the following raw materials in parts by weight: 12-18 parts of bentonite, 17-24 parts of kaolin, 10-12 parts of modified attapulgite, 8-10 parts of aluminum hydroxide, 6-9 parts of sodium hydroxide solution, 8-10 parts of hydrochloric acid, 9-12 parts of activated fly ash, 4-5 parts of calcium carbonate, 3-4 parts of alum, 4-6 parts of Chinese yam, 7-8 parts of activated carbon, 0.3-0.5 part of hydrogen peroxide, 0.4-0.6 part of pore-increasing agent, 1.3-1.8 parts of dispersing agent, 1.2-1.9 parts of bactericide and a proper amount of water.
3. The special water purifying agent for wastewater treatment according to claim 1, which comprises the following raw materials in parts by weight: 15 parts of bentonite, 20 parts of kaolin, 11 parts of modified attapulgite, 9 parts of aluminum hydroxide, 8 parts of sodium hydroxide solution, 9 parts of hydrochloric acid, 10 parts of activated fly ash, 4.3 parts of calcium carbonate, 3.4 parts of alum, 4.6 parts of Chinese yam, 7.2 parts of activated carbon, 0.4 part of hydrogen peroxide, 0.5 part of pore-increasing agent, 1.7 parts of dispersing agent, 1.5 parts of bactericide and a proper amount of water.
4. The special water purifying agent for wastewater treatment according to claim 1, wherein the modified attapulgite is prepared by the following method:
(1) crushing natural attapulgite to 200-300 meshes, adding water 15 times of the mass of the attapulgite, stirring to form suspension slurry, centrifuging the upper suspension in a centrifugal machine at 4000r/min for 5-10 min, and performing vacuum filtration;
(2) putting the filter cake obtained in the step (1) into a flask, adding 2mol/L diluted hydrochloric acid, stirring and refluxing for 20-30 min at the temperature of 60-80 ℃, performing vacuum filtration, and washing with distilled water until the pH value is 6-7 to obtain a filter cake;
(3) and (3) placing the filter cake obtained in the step (2) in a muffle furnace, raising the temperature to 600-800 ℃, roasting at a constant temperature for 4 hours, cooling, and grinding until the particle size is 200 meshes.
5. The special water purifying agent for wastewater treatment according to claim 1, wherein the dispersant is any one of sodium hexametaphosphate, sodium pyrophosphate and sodium dodecyl sulfate.
6. The special water purifying agent for wastewater treatment according to claim 1, wherein the pore-increasing agent is potassium bicarbonate.
7. The special water purifying agent for wastewater treatment as claimed in claim 1, wherein the amount of water used in step (2) is 10 times of the weight of bentonite, and the amount of water added in step (7) is 10 times of the weight of yam.
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