CN111892200A - Decoration sewage treatment method - Google Patents
Decoration sewage treatment method Download PDFInfo
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- CN111892200A CN111892200A CN202010760748.7A CN202010760748A CN111892200A CN 111892200 A CN111892200 A CN 111892200A CN 202010760748 A CN202010760748 A CN 202010760748A CN 111892200 A CN111892200 A CN 111892200A
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- decoration
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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
- C02F9/00—Multistage 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a decoration sewage treatment method, which belongs to the technical field of sewage treatment and comprises the following steps: step S1: removing impurities, namely introducing the collected decoration sewage into a filter screen to remove mechanical impurities and other foreign matters mixed in the decoration sewage; step S2: adjusting the pH value of the decoration sewage to 3.7-5.1; step S3: carrying out primary separation, standing decoration sewage with the pH value of 3.7-5.1 for a period of time, and filtering to obtain filter residue I and filtrate I; step S4: and performing secondary separation, and injecting the filtrate I into a stirrer. In the invention, the sewage is treated by adopting a physical method, so that the consumption of the additive can be greatly saved, the added additives are few in types, secondary pollution cannot be easily caused, the treatment cost is relatively low, the efficiency is high, the energy consumption is low, the paint can be removed by physical air flotation, part of the paint can be recycled, the repeated use of the paint is promoted, and the resource waste is avoided.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a decoration sewage treatment method.
Background
Decoration is also called decoration or decoration, and refers to a whole set of construction scheme and design scheme which is implemented in a certain area and range, including hydropower construction, wall, floor, ceiling, landscape and the like, and is formed according to a certain design concept and aesthetic rules.
In order to prevent pollution to the environment when sewage is discharged, a scheme for treating the decoration sewage needs to be designed, for example, a harmless treatment method for the decoration sewage (patent No. CN 109081503A) disclosed by Chinese patent network, the technical problem solved by the patent is that in the field of home decoration, the working procedures of decoration and the like inevitably generate sewage, but the decoration sewage is usually discharged without treatment, wherein components such as formaldehyde which are greatly harmful to human bodies enter the daily living environment of people along with the discharge of the sewage, so that the indoor air quality of the whole corridor is seriously deteriorated, the neighborhood relation is seriously influenced, the decoration sewage has toxicity to microorganisms, and the formaldehyde and the paint contained in the decoration sewage cannot be directly biochemically treated, in the past, the daily living environment of people can be greatly influenced, the health of people can be seriously and even directly influenced, various reactants are added into decoration sewage, and the corresponding process flow is customized, but the problem is solved, the defects still exist in the patent, in the process of treating the decoration sewage, substances such as paint in the sewage are strongly oxidized by adopting a chemical reaction mode, the consumption of additives is high, secondary pollution is easy to generate, the cost is high, the paint in the sewage is directly decomposed, the waste of resources is caused, and therefore, a decoration sewage treatment method is urgently needed in the market at the present stage to solve the problem.
Disclosure of Invention
The invention aims to: the method for treating the decoration sewage aims to solve the problems that substances such as paint in the sewage are strongly oxidized in a chemical reaction mode in the process of treating the decoration sewage, the consumption of additives is high, secondary pollution is easy to generate, the cost is high, and the paint in the sewage is directly decomposed to cause resource waste.
In order to achieve the purpose, the invention adopts the following technical scheme:
a decoration sewage treatment method comprises the following steps:
step S1: removing impurities, namely introducing the collected decoration sewage into a filter screen to remove mechanical impurities and other foreign matters mixed in the decoration sewage;
step S2: adjusting the pH value of the decoration sewage to 3.7-5.1;
step S3: carrying out primary separation, standing decoration sewage with the pH value of 3.7-5.1 for a period of time, and filtering to obtain filter residue I and filtrate I;
step S4: performing secondary separation, injecting the filtrate I into a stirrer, sequentially putting the solvent, the catalyst and the accelerator into the stirrer, uniformly stirring until the mixture is completely pasty, then conveying the mixture into a filter cloth machine, uniformly spreading the mixture on filter cloth, and performing suction filtration to obtain filter residue II and filtrate II;
step S5: the second filtrate can be subjected to deep purification through a subsequent filtering unit, and the first filter residue and the second filter residue can be recovered through a subsequent recovery unit.
As a further description of the above technical solution:
the recovery unit comprises the following process flows:
step S6: collecting the obtained first filter residue and the second filter residue into a vertical stirring tank, and injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution;
step S7: conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate;
step S8: sterilizing the obtained filtrate, adding a buffer to adjust the pH value of the filtrate, and finally injecting the adjusted filtrate into drying equipment to obtain a filter cake;
step S9: and injecting the filter cake and ethanol into a reaction kettle with a stirring function according to a certain proportion, and finally distilling to obtain the new paint.
As a further description of the above technical solution:
in the step S3, at least one of citric acid, hydrochloric acid, acetic acid and citric acid is adopted when the pH value is adjusted, and the concentration of the hydrochloric acid is 1-5 mol/L.
As a further description of the above technical solution:
the solvent in the step S4 is a water-soluble alcohol solvent, and the water-soluble alcohol solvent is at least one of ethanol, isopropanol, ethylene glycol, diethylene glycol, triethylene glycol, glycerol, 1, 3-butanediol, neopentyl glycol, polyethylene glycol 200, polyethylene glycol 400, ethylene glycol monomethyl ether, and propylene glycol methyl ether.
As a further description of the above technical solution:
the catalyst in step S4 is dichloromethane.
As a further description of the above technical solution:
the accelerator in step S4 is ethylene glycol monobutyl ether.
As a further description of the above technical solution:
the aperture of the filter membrane used in the filtration in the step S3 is 1-10 μm, and the standing time in the step S3 is 6-8 hours.
As a further description of the above technical solution:
and the filtering unit in the step S5 is filled and shaped by adsorbents such as activated carbon, ceramsite and the like.
As a further description of the above technical solution:
and in the step S9, the vacuum degree in the reaction kettle is 0.1-0.02 MPa, and the distillation is carried out for 1.5-3 hours at the temperature of 35-49 ℃.
As a further description of the above technical solution:
the filter cake and the ethanol in the step S9 are mixed according to the weight ratio of 4: 5.
in summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, the sewage is treated by adopting a physical method, so that the consumption of the additive can be greatly saved, the added additives are few in types, secondary pollution cannot be easily caused, the treatment cost is relatively low, the efficiency is high, the energy consumption is low, the paint can be removed by physical air flotation, part of the paint can be recycled, the repeated use of the paint is promoted, and the resource waste is avoided.
Drawings
FIG. 1 is a process flow diagram of a decoration sewage treatment method according to the present invention;
FIG. 2 is a process flow diagram for recovering first filter residue and second filter residue in the decoration sewage treatment method provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a decoration sewage treatment method comprises the following steps:
step S1: removing impurities, namely introducing the collected decoration sewage into a filter screen to remove mechanical impurities and other foreign matters mixed in the decoration sewage;
step S2: adjusting the pH value of the decoration sewage to 3.7-5.1;
step S3: carrying out primary separation, standing decoration sewage with the pH value of 3.7-5.1 for a period of time, and filtering to obtain filter residue I and filtrate I;
step S4: performing secondary separation, injecting the filtrate I into a stirrer, sequentially putting the solvent, the catalyst and the accelerator into the stirrer, uniformly stirring until the mixture is completely pasty, then conveying the mixture into a filter cloth machine, uniformly spreading the mixture on filter cloth, and performing suction filtration to obtain filter residue II and filtrate II;
step S5: the second filtrate can be subjected to deep purification through a subsequent filtering unit, and the first filter residue and the second filter residue can be recovered through a subsequent recovery unit.
Specifically, as shown in fig. 1, the recovery unit includes a process flow:
step S6: collecting the obtained first filter residue and the second filter residue into a vertical stirring tank, and injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution;
step S7: conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate;
step S8: sterilizing the obtained filtrate, adding a buffer to adjust the pH value of the filtrate, and finally injecting the adjusted filtrate into drying equipment to obtain a filter cake;
step S9: and injecting the filter cake and ethanol into a reaction kettle with a stirring function according to a certain proportion, and finally distilling to obtain the new paint.
Specifically, as shown in fig. 1, at least one of citric acid, hydrochloric acid, acetic acid and citric acid is used in the step S3 for adjusting the pH, and the concentration of the hydrochloric acid is 1-5 mol/L.
Specifically, as shown in fig. 1, the solvent in step S4 is a water-soluble alcohol solvent, and the water-soluble alcohol solvent is at least one of ethanol, isopropanol, ethylene glycol, diethylene glycol, triethylene glycol, glycerol, 1, 3-butanediol, neopentyl glycol, polyethylene glycol 200, polyethylene glycol 400, ethylene glycol methyl ether, and propylene glycol methyl ether.
Specifically, as shown in fig. 1, the catalyst in step S4 is dichloromethane.
Specifically, as shown in fig. 1, the accelerator in step S4 is ethylene glycol monobutyl ether.
Specifically, as shown in FIG. 1, the pore size of the filter membrane used in the filtration in step S3 is 1 μm to 10 μm, and the standing time in step S3 is 6 to 8 hours.
Specifically, as shown in fig. 1, the filtering unit in step S5 is filled and shaped with adsorbents such as activated carbon and ceramic particles.
Specifically, as shown in fig. 2, in step S9, the vacuum degree inside the reaction kettle is 0.1 to 0.02MPa, and the distillation is performed at 35 to 49 ℃ for 1.5 to 3 hours.
Specifically, as shown in fig. 2, in the step S9, the mixture ratio of the filter cake and the ethanol is 4: 5.
the working principle is as follows: when in use, impurities are removed, the collected decoration sewage is introduced into a filter screen, mechanical impurities and other foreign matters mixed in the decoration sewage are removed, the pH value of the decoration sewage is adjusted to be 3.7-5.1, primary separation is carried out, the decoration sewage with the pH value of 3.7-5.1 is kept still for a period of time and then filtered to obtain a first filter residue and a first filtrate, secondary separation is carried out, the first filtrate is injected into a stirrer, a solvent, a catalyst and an accelerant are sequentially put into the stirrer, the mixture is stirred uniformly until the whole mixture becomes pasty, then the mixture is conveyed to a filter cloth machine to be uniformly paved on filter cloth, suction filtration is carried out to obtain a second filter residue and a second filtrate, the second filtrate can be deeply purified through a subsequent filtering unit, the first filter residue and the second filter residue can be recovered through a subsequent recovery unit, the obtained first filter residue and the obtained second filter residue are collected into a vertical stirring tank, and injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution, conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate, sterilizing the obtained filtrate, injecting a buffering agent to adjust the pH value of the filtrate, injecting the adjusted filtrate into drying equipment to obtain a filter cake, injecting the filter cake and ethanol into a reaction kettle with a stirring function according to a proportion, and finally distilling to obtain the new paint.
The first embodiment is as follows: removing impurities, introducing collected decoration sewage into a filter screen, removing mechanical impurities and other foreign matters mixed in the decoration sewage, adjusting the pH value of the decoration sewage to 3.7, carrying out primary separation, standing the decoration sewage with the pH value of 3.7 for a period of time, filtering to obtain a first filter residue and a first filtrate, carrying out secondary separation, injecting the first filtrate into a stirrer, sequentially putting a solvent, a catalyst and an accelerant into the stirrer, uniformly stirring until the first filtrate is completely pasty, then conveying the mixture into a filter cloth machine, uniformly spreading the mixture on the filter cloth, carrying out suction filtration to obtain a second filter residue and a second filtrate, deeply purifying the second filtrate through a subsequent filtering unit, recovering the first filter residue and the second filter residue through a subsequent recovery unit, and measuring the total recovery weight of the first filter residue and the second filter residue; removing impurities, introducing the collected decoration sewage into a filter screen, removing mechanical impurities and other foreign matters mixed in the decoration sewage, adjusting the pH value of the decoration sewage to 5.1, carrying out primary separation, standing the decoration sewage with the pH value of 5.1 for a period of time, filtering to obtain first filter residue and first filtrate, performing secondary separation, injecting the first filtrate into a stirrer, and the solvent, the catalyst and the accelerant are put into a stirrer in turn, stirred evenly until all become paste, and then, uniformly spreading the filter residue on the filter cloth in a filter cloth machine, carrying out suction filtration to obtain a second filter residue and a second filtrate, carrying out deep purification on the second filtrate through a subsequent filter unit, recovering the first filter residue and the second filter residue through a subsequent recovery unit, measuring the total recovery weight of the first filter residue and the second filter residue, and comparing the difference value between the first weight and the second weight.
Example two: collecting the obtained first filter residue and the second filter residue in a vertical stirring tank, injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution, conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate, performing sterilization treatment on the obtained filtrate, injecting a buffering agent to adjust the pH value of the filtrate, injecting the adjusted filtrate into drying equipment to obtain a filter cake, injecting the filter cake and ethanol into a reaction kettle with a stirring function in proportion, enabling the vacuum degree in the reaction kettle to be 0.1MPa, distilling for 1.5 hours at the temperature of 35 ℃, and finally distilling to obtain a new paint to obtain the total weight of the new paint; collecting the obtained first filter residue and the second filter residue in a vertical stirring tank, injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution, conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate, performing sterilization treatment on the obtained filtrate, injecting a buffering agent to adjust the pH value of the filtrate, injecting the adjusted filtrate into drying equipment to obtain a filter cake, injecting the filter cake and ethanol into a reaction kettle with a stirring function in proportion, enabling the vacuum degree inside the reaction kettle to be 0.02MPa, distilling at the temperature of 35 ℃ for 1.5 hours, and finally distilling to obtain a new paint to obtain the total weight of the new paint.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A decoration sewage treatment method is characterized in that the process flow comprises the following steps:
step S1: removing impurities, namely introducing the collected decoration sewage into a filter screen to remove mechanical impurities and other foreign matters mixed in the decoration sewage;
step S2: adjusting the pH value of the decoration sewage to 3.7-5.1;
step S3: carrying out primary separation, standing decoration sewage with the pH value of 3.7-5.1 for a period of time, and filtering to obtain filter residue I and filtrate I;
step S4: performing secondary separation, injecting the filtrate I into a stirrer, sequentially putting the solvent, the catalyst and the accelerator into the stirrer, uniformly stirring until the mixture is completely pasty, then conveying the mixture into a filter cloth machine, uniformly spreading the mixture on filter cloth, and performing suction filtration to obtain filter residue II and filtrate II;
step S5: the second filtrate can be subjected to deep purification through a subsequent filtering unit, and the first filter residue and the second filter residue can be recovered through a subsequent recovery unit.
2. A finishing sewage treatment process according to claim 1 wherein said recovery unit comprises the process flow:
step S6: collecting the obtained first filter residue and the second filter residue into a vertical stirring tank, and injecting excessive deionized water to completely dissolve the first filter residue and the second filter residue to obtain a mixed solution;
step S7: conveying the obtained mixed solution to a filter cloth machine by using a liquid pump to obtain a filtrate;
step S8: sterilizing the obtained filtrate, adding a buffer to adjust the pH value of the filtrate, and finally injecting the adjusted filtrate into drying equipment to obtain a filter cake;
step S9: and injecting the filter cake and ethanol into a reaction kettle with a stirring function according to a certain proportion, and finally distilling to obtain the new paint.
3. A decoration sewage treatment method according to claim 1, wherein at least one of citric acid, hydrochloric acid, acetic acid and citric acid is used for adjusting the pH in step S3, and the concentration of hydrochloric acid is 1-5 mol/L.
4. A decoration sewage treatment method according to claim 1, wherein the solvent in step S4 is a water-soluble alcohol solvent, and the water-soluble alcohol solvent is at least one of ethanol, isopropanol, ethylene glycol, diethylene glycol, triethylene glycol, glycerol, 1, 3-butanediol, neopentyl glycol, polyethylene glycol 200, polyethylene glycol 400, ethylene glycol methyl ether and propylene glycol methyl ether.
5. A decorative sewage treatment method according to claim 1, wherein the catalyst in step S4 is dichloromethane.
6. A decoration sewage treatment method according to claim 1, wherein the accelerator in step S4 is ethylene glycol monobutyl ether.
7. A decoration sewage treatment method according to claim 1, wherein the pore size of the filter membrane used in the filtration in step S3 is 1 μm to 10 μm, and the standing time in step S3 is 6 to 8 hours.
8. A decoration sewage treatment method as claimed in claim 1, wherein said filtering unit in step S5 is filled with adsorbent such as activated carbon, ceramsite, etc.
9. A decoration sewage treatment method according to claim 2, characterized in that, in step S9, the vacuum degree inside the reaction kettle is 0.1 MPa-0.02 MPa, and distillation is performed at 35 ℃ to 49 ℃ for 1.5 hours-3 hours.
10. A decoration sewage treatment method according to claim 2, wherein the filter cake and the ethanol in the step S9 are mixed in a weight ratio of 4: 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010760748.7A CN111892200A (en) | 2020-07-31 | 2020-07-31 | Decoration sewage treatment method |
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| CN202010760748.7A CN111892200A (en) | 2020-07-31 | 2020-07-31 | Decoration sewage treatment method |
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| CN111892200A true CN111892200A (en) | 2020-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2610563A (en) * | 2021-09-08 | 2023-03-15 | Pra World Ltd | Method of recovering inorganic pigment |
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2020
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| US5492626A (en) * | 1993-05-14 | 1996-02-20 | Nippon Paint Co., Ltd. | Method for recycling a paint recovery effluent |
| CN102580389A (en) * | 2012-02-23 | 2012-07-18 | 北京水泥厂有限责任公司 | Method for processing paint slag muck by separating slag muck from water |
| CN104148369A (en) * | 2014-07-27 | 2014-11-19 | 广西梧州龙鱼漆业有限公司 | Regeneration method for paint waste residues |
| CN104230086A (en) * | 2014-09-25 | 2014-12-24 | 成都源永科技发展有限公司 | Method for recycling water-based paint detergent waste liquid |
| CN104893398A (en) * | 2015-06-05 | 2015-09-09 | 永康市弘毅贸易有限公司 | Method for recycling waste paint slag of water-soluble paint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2610563A (en) * | 2021-09-08 | 2023-03-15 | Pra World Ltd | Method of recovering inorganic pigment |
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Application publication date: 20201106 |