CN113428959B - Water-based paint mist coagulant, and preparation method and application thereof - Google Patents
Water-based paint mist coagulant, and preparation method and application thereof Download PDFInfo
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- CN113428959B CN113428959B CN202110664967.XA CN202110664967A CN113428959B CN 113428959 B CN113428959 B CN 113428959B CN 202110664967 A CN202110664967 A CN 202110664967A CN 113428959 B CN113428959 B CN 113428959B
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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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- 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
- C02F1/542—Phosphorus compounds
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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
- C02F1/545—Silicon compounds
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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
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/14—Paint wastes
Abstract
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a water-based paint mist coagulant, and a preparation method and application thereof. The invention provides a water-based paint mist coagulant, which comprises a first medicament and a second medicament which are separately packaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide. The water-based paint mist coagulant provided by the invention has a good coagulation and floating effect on water-based paint, floating paint residues are coagulated into blocks and are not easy to sink, the floating paint residues can float for a long time and are easy to salvage, the water-based paint mist coagulant has an excellent removal effect, and a water body is clear and transparent. Experimental results show that the floating rate of the waterborne paint mist coagulant provided by the invention to waterborne paint reaches 98%.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a water-based paint mist coagulant, and a preparation method and application thereof.
Background
The water-based paint is characterized in that the number of polar functional bonds is increased through resin modification, meanwhile, a surfactant is added, so that the paint type with water as a dispersing agent is formed, and the pure water is also used for adjusting and diluting in the coating operation, so that the emission of volatile organic compounds in the spraying process is greatly reduced. At present, automobile finish paint adopted by various automobile manufacturers is basically completely water-based, and water-based paint is also applied to coating lines of some manufacturers.
At present, a large amount of over-spray paint mist is generated in a coating process, the over-spray paint mist is dissolved in spray paint circulating water through absorption and filtration of a wet paint mist filtering system, and the over-spray paint must be separated from the circulating water for long-term safe operation of a spray paint system. The water-based paint is completely dissolved in water, and the problems of large foam, incomplete demulsification and difficulty in turbidity reduction are frequently encountered in the process of treating wastewater containing the water-based paint, so that the subsequent biochemical treatment effect is influenced, and the discharge does not reach the standard. Therefore, it is necessary to separate the aqueous paint from the waste water. At present, most of paint mist coagulants used in circulating water of domestic wet paint shops use the paint mist coagulants of the solvent paint era, and cannot flocculate water-based paint to separate the water-based paint from waste water.
Disclosure of Invention
In view of the above, the present invention provides an aqueous paint mist coagulant, and a preparation method and an application thereof, and the aqueous paint mist coagulant provided by the present invention can effectively coagulate an aqueous paint in wastewater, so that the aqueous paint can be well separated from the wastewater.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a water-based paint mist coagulant which is characterized by comprising a first medicament and a second medicament which are independently subpackaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide; the mass ratio of water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide in the preparation raw materials of the first medicament is (80-87): (13-18): (0.5-2.0): (0.05-0.12); the mass ratio of water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide in the preparation raw materials of the second medicament is (25-35): 3-10): 18-25): 10-15): 2-5.
Preferably, the preparation method of the first medicament comprises the following steps:
respectively mixing aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide with water to obtain an aluminum silicate aqueous solution, an acryloyloxyethyl trimethyl ammonium chloride aqueous solution and a polyacrylamide aqueous solution;
mixing the aluminum silicate aqueous solution and the acryloyloxyethyl trimethyl ammonium chloride aqueous solution, and performing a complex reaction to obtain a complex reaction solution;
and mixing the polyacrylamide aqueous solution with the complex reaction solution to obtain a first medicament.
Preferably, the mass concentration of the aluminum silicate aqueous solution is 10-20%; the mass concentration of the acryloyloxyethyl trimethyl ammonium chloride aqueous solution is 5-15%.
Preferably, the mass concentration of the polyacrylamide aqueous solution is 0.5 to 2.0%.
Preferably, the mass ratio of the aluminum silicate aqueous solution, the acryloyloxyethyl trimethyl ammonium chloride aqueous solution and the polyacrylamide aqueous solution is (9-14): 1-3): 1.
Preferably, the temperature of the complexation reaction is 50-90 ℃; the time of the complex reaction is 1-5 h.
Preferably, the preparation method of the second medicament comprises the following steps:
mixing methyldiethanolamine and phosphoric acid, and carrying out condensation reaction to obtain a first product;
mixing ammonia water and tartaric acid, and carrying out neutralization reaction to obtain a second product;
and mixing the polyacrylamide and water to obtain a polyacrylamide aqueous solution, and mixing the polyacrylamide aqueous solution with the first product and the second product to obtain a second medicament.
Preferably, the mass concentration of the polyacrylamide aqueous solution is 0.5 to 2.0%.
The invention also provides application of the water-based paint mist coagulant in the technical scheme in treatment of water-based paint coating wastewater.
Preferably, the application method of the water-based paint mist coagulant comprises the following steps: adding a first agent into the aqueous paint coating wastewater, adjusting the pH value to 8-9, adding a second agent, and performing aqueous paint coagulation to obtain the treated aqueous paint coating wastewater.
The invention provides a water-based paint mist coagulant, which comprises a first medicament and a second medicament which are independently subpackaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide; the mass ratio of water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide in the preparation raw materials of the first medicament is (80-87): (13-18): (0.5-2.0): (0.05-0.12); the mass ratio of water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide in the preparation raw materials of the second medicament is (25-35), (3-10), (18-25), (10-15) and (2-5). The water-based paint mist coagulant provided by the invention has a good coagulation and floating effect on water-based paint, floating paint slag is coagulated into blocks, is not easy to sink, can float for a long time, is easy to salvage, and has an excellent water-based paint removal effect, and a water body is clear and transparent. Experimental results show that the floating rate of the waterborne paint mist coagulant provided by the invention on waterborne paint reaches 98%.
Detailed Description
The invention provides a water-based paint mist coagulant, which comprises a first medicament and a second medicament which are separately packaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide; the mass ratio of water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide in the preparation raw materials of the first medicament is (80-87): (13-18): (0.5-2.0): (0.05-0.12); the mass ratio of water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide in the preparation raw materials of the second medicament is (25-35): 3-10): 18-25): 10-15): 2-5.
Unless otherwise specified, the present invention does not require any particular source of the raw materials used, and commercially available products known to those skilled in the art may be used.
The water-based paint mist coagulant provided by the invention comprises a first medicament which is independently subpackaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide. In the invention, the mass ratio of water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide in the raw materials for preparing the first medicament is (80-87): (13-18): (0.5-2.0): 0.05-0.12), preferably (81-83): 13-18): 0.5-1.6): 0.05-0.12.
In the present invention, the method for preparing the first agent in the aqueous paint mist coagulant preferably comprises the following steps:
respectively mixing aluminum silicate, acryloyloxyethyltrimethyl ammonium chloride and polyacrylamide with water to obtain an aluminum silicate aqueous solution, an acryloyloxyethyltrimethyl ammonium chloride aqueous solution and a polyacrylamide aqueous solution;
mixing the aluminum silicate aqueous solution and the acryloyloxyethyl trimethyl ammonium chloride aqueous solution, and carrying out a complex reaction to obtain a complex reaction solution;
and mixing the polyacrylamide aqueous solution and the complex reaction solution to obtain a first medicament.
The invention respectively mixes aluminum silicate, acryloyloxyethyltrimethyl ammonium chloride and polyacrylamide with water to obtain an aluminum silicate aqueous solution, an acryloyloxyethyltrimethyl ammonium chloride aqueous solution and a polyacrylamide aqueous solution. In the invention, the aluminum silicate aqueous solution is preferably prepared by dissolving aluminum silicate in water; the water solution of the acryloyloxyethyl trimethyl ammonium chloride is preferably prepared by dissolving acryloyloxyethyl trimethyl ammonium chloride in water; the polyacrylamide aqueous solution is preferably prepared by dissolving polyacrylamide in water. In the present invention, the mass concentration of the aqueous aluminum silicate solution is preferably 10 to 20%, more preferably 15 to 20%; the mass concentration of the acryloyloxyethyltrimethyl ammonium chloride aqueous solution is preferably 5-15%, and more preferably 10-15%; the mass concentration of the polyacrylamide aqueous solution is preferably 0.5 to 2.0%, more preferably 1.0 to 2.0%. In the invention, the mass ratio of the aluminum silicate aqueous solution, the acryloyloxyethyltrimethyl ammonium chloride aqueous solution and the polyacrylamide aqueous solution is preferably (9-14): 1-3): 1, and more preferably (9-12): 1-2): 1.
After the aluminum silicate aqueous solution and the acryloyloxyethyltrimethyl ammonium chloride aqueous solution are obtained, the aluminum silicate aqueous solution and the acryloyloxyethyltrimethyl ammonium chloride aqueous solution are mixed for a complex reaction to obtain a complex reaction solution. In the present invention, the temperature of the complexation reaction is preferably 50 to 90 ℃, and more preferably 60 to 80 ℃; the time of the complexation reaction is preferably 1 to 5 hours, more preferably 2 to 4 hours.
After the complexing reaction is finished, the obtained product is preferably cooled to obtain a complexing reaction solution; the cooling process is not particularly limited in the present invention, and may be performed according to a process well known in the art.
After the complex reaction liquid is obtained, the polyacrylamide aqueous solution and the complex reaction liquid are mixed to obtain the first medicament. In the present invention, the mixing is preferably performed by stirring. In the invention, the complex reaction liquid is preferably cooled and then mixed with the polyacrylamide aqueous solution. The stirring mode is not particularly limited in the invention, and the solution can be stirred by adopting a stirring mode well known in the art until the solution is in a clear and transparent state.
The water-based paint mist coagulant provided by the invention comprises a second medicament which is independently subpackaged; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide; in the invention, the mass ratio of water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide in the preparation raw materials of the second medicament is (25-35): 3-10): 18-25): 10-15): 2-5, preferably (25-30): 4-10): 18-25): 10-15): 2-5.
In the present invention, the method for preparing the second agent in the aqueous paint mist coagulant preferably comprises the following steps:
mixing methyldiethanolamine and phosphoric acid, and carrying out condensation reaction to obtain a first product;
mixing ammonia water and tartaric acid, and carrying out neutralization reaction to obtain a second product;
and mixing the polyacrylamide and water to obtain a polyacrylamide aqueous solution, and mixing the polyacrylamide aqueous solution with the first product and the second product to obtain a second medicament.
According to the invention, methyldiethanolamine and phosphoric acid are mixed and subjected to condensation reaction to obtain a first product. In the present invention, the temperature of the condensation reaction is preferably 70 to 100 ℃, more preferably 80 to 95 ℃. In the present invention, the time for the condensation reaction is preferably 10 to 30min, and more preferably 15 to 20min. The condensation reaction is preferably carried out in a reaction kettle. According to the invention, preferably, methyldiethanolamine is added into a reaction kettle, then the temperature is raised to the condensation reaction temperature, and then phosphoric acid is slowly added for condensation reaction. The rate of addition of phosphoric acid is not particularly limited in the present invention and may be slowly added according to a process well known in the art.
After the condensation reaction is completed, the present invention preferably cools the resulting first product to room temperature. The invention preferably allows the cooled first product to stand for 2 hours.
According to the invention, ammonia water and tartaric acid are mixed for neutralization reaction to obtain a second product. The tartaric acid is preferably slowly added to the ammonia water for mixing. The process of the present invention for the slow addition is not particularly limited and may be performed according to a process well known in the art. In the present invention, the temperature of the neutralization reaction is preferably room temperature; the time of the neutralization reaction is preferably 5 to 10min, and more preferably 5 to 8min; the neutralization reaction is preferably carried out in a reaction kettle.
After the first product and the second product are obtained, the invention mixes the polyacrylamide aqueous solution obtained by mixing polyacrylamide and water with the first product and the second product to obtain the second medicament. In the present invention, the preparation method of the polyacrylamide aqueous solution is preferably to add water and polyacrylamide into a reaction kettle, and stir for 3 hours at normal temperature. In the present invention, the mass concentration of the polyacrylamide aqueous solution is preferably 5 to 20%, more preferably 8 to 15%.
In the present invention, the process of mixing the aqueous polyacrylamide solution with the first product and the second product is preferably a process of adding the first product to the aqueous polyacrylamide solution, performing a first stirring, and then adding the second product to the resulting mixture, performing a second stirring. In the present invention, the time of the first stirring and the second stirring is independently preferably 1 to 3 hours, and more preferably 1 to 2 hours. In the present invention, the first stirring and the second stirring may be performed by any stirring method known in the art without any particular limitation. The first stirring and the second stirring are not particularly limited in the present invention, and the rate usually used in the art may be used.
The invention also provides the application of the water-based paint mist coagulant in the technical scheme in the treatment of water-containing paint coating wastewater.
In the present invention, the method for applying the water-based paint mist coagulant preferably comprises the following steps: adding a first agent into the aqueous paint coating wastewater, adjusting the pH value to 8-9, adding a second agent, and performing aqueous paint coagulation to obtain the treated aqueous paint coating wastewater.
The source of the aqueous paint coating waste water is not particularly limited in the present invention, and may be obtained from sources well known in the art.
In the invention, in the process of adding the first medicament into the water-containing paint coating wastewater, water is preferably added to obtain a first additive solution; the mass concentration of the first medicament in the first additive solution is preferably 2wt. -%;
after the first additive solution is obtained, the pH value is preferably adjusted to 8-9; the pH value is preferably adjusted by using sulfuric acid (the mass concentration is 1 mol/L) or sodium hydroxide.
After the pH value is adjusted, the second medicament is preferably added into the obtained material, and water is simultaneously added to obtain a second additive solution; the mass concentration of the second medicament in the second additive solution is preferably 0.2wt. -%;
in the present invention, the mass ratio of the first agent to the second agent is preferably 10;
after the second agent is added, the first agent and the second agent are coagulated with the water-based paint. In the present invention, the temperature at which the aqueous paint is coagulated is preferably room temperature. According to the invention, the water-based paint block is preferably salvaged after the water-based paint block floats upwards.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
Preparing a first agent of the water-based paint mist coagulant:
weighing 2.8kg of aluminum silicate, dissolving the aluminum silicate in 11.2kg of water, and preparing 14kg of 20wt.% aluminum silicate aqueous solution;
0.28kg of acryloyloxyethyltrimethyl ammonium chloride is weighed and dissolved in 2.52kg of water to prepare 2.8kg of 10wt.% acryloyloxyethyltrimethyl ammonium chloride aqueous solution;
weighing 0.017kg of polyacrylamide and dissolving in 1.383kg of water to prepare 1.4kg1.2wt.% of polyacrylamide aqueous solution;
mixing an aluminum silicate aqueous solution and an acryloyloxyethyltrimethyl ammonium chloride aqueous solution, carrying out a complex reaction for 4 hours at 70 ℃, and cooling to obtain a complex reaction solution;
adding a polyacrylamide aqueous solution into the complex reaction solution, and quickly stirring until the solution is clear and transparent to obtain a first medicament;
preparing a second agent of the water-based paint mist coagulant:
adding 3kg of methyldiethanolamine into a 5L reaction kettle, heating to 80 ℃, slowly adding 0.5kg of phosphoric acid for condensation reaction for 15min, cooling to room temperature, and standing for 2h to obtain a first product;
adding 2kg of ammonia water into a 5L reaction kettle, slowly adding 1.2kg of tartaric acid, and reacting at room temperature for 6min to obtain a second product；
Adding 3kg of water and 0.3kg of polyacrylamide into a reaction kettle, and stirring for 3 hours at normal temperature to obtain 9.1wt.% of polyacrylamide aqueous solution;
and adding the first product into the polyacrylamide aqueous solution, stirring for 1 hour at normal temperature, adding the second product, and stirring for 2 hours at normal temperature to obtain a second medicament.
Example 2
Preparing a first agent of the water-based paint mist coagulant:
weighing 2.8kg of aluminum silicate, dissolving the aluminum silicate in 11.2kg of water, and preparing 14kg of 20wt.% aluminum silicate aqueous solution;
0.16kg of acryloyloxyethyl trimethyl ammonium chloride is weighed and dissolved in 1.44kg of water to prepare 1.6kg of 10wt.% acryloyloxyethyl trimethyl ammonium chloride aqueous solution;
weighing 0.17kg of polyacrylamide, dissolving in 1.383kg of water, and preparing to obtain 1.4kg1.2wt.% polyacrylamide aqueous solution;
performing a complex reaction on an aluminum silicate aqueous solution and an acryloyloxyethyl trimethyl ammonium chloride aqueous solution at 80 ℃ for 4 hours, and cooling to obtain a complex reaction solution;
and adding the polyacrylamide aqueous solution into the cooled complex reaction solution, and quickly stirring until the solution is clear and transparent to obtain the first medicament.
Preparing a second agent of the water-based paint mist coagulant:
adding 3kg of methyldiethanolamine into a 5L reaction kettle, heating to 93 ℃, slowly adding 1kg of phosphoric acid for reacting for 15min, cooling to room temperature, and standing for 2h to obtain a first product;
adding 2kg of ammonia water into a 5L reaction kettle, slowly adding 1.2kg of tartaric acid, and reacting at room temperature for 6min to obtain a second product;
adding 3kg of water and 0.5kg of polyacrylamide into a reaction kettle, and stirring for 3 hours at normal temperature to obtain 14.3wt.% of polyacrylamide aqueous solution;
and adding the first product into the polyacrylamide aqueous solution, stirring for 1 hour at normal temperature, adding the second product, and stirring for 2 hours at normal temperature to obtain a second medicament.
Application example 1
Mixing 50kg of the first medicament in the embodiment 1 with water to obtain a first additive solution with the mass concentration of the first medicament being 2wt. -%;
mixing 5kg of the second preparation in example 1 with water to obtain a second additive solution with the mass concentration of the second preparation being 0.2wt. -%;
adding a first additive solution into the aqueous paint coating wastewater, adjusting the pH to 8 by using sodium hydroxide, adding a second additive solution into the obtained mixed material, coagulating the aqueous paint, and fishing the aqueous paint agglomerates after the aqueous paint agglomerates float upwards to obtain the treated aqueous paint coating wastewater.
When the aqueous paint mist coagulant of example 1 was added to aqueous paint coating wastewater, the aqueous paint coagulated into lumps and floated, the water body was clear and transparent, and the floating rate of the aqueous paint was 98%.
Application example 2
In accordance with the application method of application example 1, only the first and second agents of example 1 are replaced with the first and second agents of example 2;
when the aqueous paint mist coagulant of example 1 was added to aqueous paint coating wastewater, the aqueous paint coagulated into lumps and floated, the water body was clear and transparent, and the floating rate of the aqueous paint was 98%.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (6)
1. The water-based paint mist coagulant is characterized by comprising a first medicament and a second medicament which are separately packaged; the preparation raw materials of the first medicament comprise water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide; the preparation raw materials of the second agent comprise water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide;
the mass ratio of water, aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide in the preparation raw materials of the first medicament is (80-87): (13-18): (0.5-2.0): 0.05-0.12);
the preparation method of the first medicament comprises the following steps:
respectively mixing aluminum silicate, acryloyloxyethyl trimethyl ammonium chloride and polyacrylamide with water to obtain an aluminum silicate aqueous solution, an acryloyloxyethyl trimethyl ammonium chloride aqueous solution and a polyacrylamide aqueous solution;
mixing the aluminum silicate aqueous solution and the acryloyloxyethyl trimethyl ammonium chloride aqueous solution, and performing a complex reaction to obtain a complex reaction solution;
mixing the polyacrylamide aqueous solution with the complex reaction solution to obtain a first medicament;
the mass concentration of the polyacrylamide aqueous solution in the first medicament is 0.5-2.0%;
the mass ratio of water, methyldiethanolamine, phosphoric acid, ammonia water, tartaric acid and polyacrylamide in the preparation raw materials of the second medicament is (25-35): 3-10): 18-25): 10-15): 2-5;
the preparation method of the second medicament comprises the following steps:
mixing methyldiethanolamine and phosphoric acid, and carrying out condensation reaction to obtain a first product;
mixing ammonia water and tartaric acid, and carrying out neutralization reaction to obtain a second product;
mixing polyacrylamide and water to obtain a polyacrylamide aqueous solution, and mixing the polyacrylamide aqueous solution with the first product and the second product to obtain a second medicament;
the mass concentration of the polyacrylamide aqueous solution in the second medicament is 5-20%.
2. The water-based paint mist coagulant according to claim 1, wherein the mass concentration of the aqueous aluminum silicate solution is 10 to 20%; the mass concentration of the acryloyloxyethyl trimethyl ammonium chloride aqueous solution is 5-15%.
3. The aqueous paint mist coagulant according to any one of claims 1 to 2, wherein the mass ratio of the aqueous aluminum silicate solution, the aqueous acryloyloxyethyltrimethyl ammonium chloride solution and the aqueous polyacrylamide solution is (9-14): 1-3): 1.
4. The water-based paint mist coagulant according to claim 1, wherein the temperature of the complexing reaction is 50 to 90 ℃; the time of the complex reaction is 1-5 h.
5. Use of the aqueous paint mist coagulant according to any one of claims 1 to 4 for treating aqueous paint coating waste water.
6. The use according to claim 5, wherein the application method of the water-based paint mist coagulant comprises the following steps: adding a first medicament into the aqueous paint coating wastewater, adjusting the pH to 8-9, adding a second medicament, and performing aqueous paint coagulation to obtain the treated aqueous paint coating wastewater.
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| JPH07713A (en) * | 1993-06-17 | 1995-01-06 | Kurita Water Ind Ltd | Flocculant composition for water base paint |
| CN106241988A (en) * | 2016-08-30 | 2016-12-21 | 中山市华光化工有限公司 | A kind of water and oil applicable type lacquer mist coagulant and preparation method thereof |
| CN111039369A (en) * | 2018-10-12 | 2020-04-21 | 上海淼清水处理有限公司 | Papermaking wastewater treatment flocculant |
| CN111592082A (en) * | 2020-05-19 | 2020-08-28 | 深圳市众望丽华实业有限公司 | Water-based paint mist coagulant, and preparation method and application thereof |
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