CN114772825A - Treatment method and treatment device for aqueous waste solvent - Google Patents
Treatment method and treatment device for aqueous waste solvent Download PDFInfo
- Publication number
- CN114772825A CN114772825A CN202210355257.3A CN202210355257A CN114772825A CN 114772825 A CN114772825 A CN 114772825A CN 202210355257 A CN202210355257 A CN 202210355257A CN 114772825 A CN114772825 A CN 114772825A
- Authority
- CN
- China
- Prior art keywords
- liquid
- reduced pressure
- conveying
- liquid storage
- storage device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/448—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by pervaporation
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/301—Detergents, surfactants
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a method and a device for treating an aqueous waste solvent, wherein the method comprises the following steps: conveying the aqueous waste solvent into a coagulation reaction device, conveying a proper amount of coagulant into the coagulation reaction device, and conveying the supernatant into a reduced pressure distillation device after the aqueous waste solvent is stirred and completely reacts; after the supernatant and the filtrate are subjected to reduced pressure distillation, conveying the distilled weak solution to a pervaporation device; and after the distillation thin liquid is subjected to pervaporation, conveying the permeation thin liquid to a wastewater treatment section. The invention provides a treatment method and a treatment device of an aqueous waste solvent, which can greatly reduce the problem of membrane pollution, prolong the service life of a membrane, reduce the cost of membrane replacement and ensure the stable operation of a pervaporation membrane unit.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method and a treatment device for an aqueous waste solvent.
Background
In recent years, with the rapid development of automobile demand, the production lines of many automobile manufacturers are continuously expanded, which also results in the production of a large amount of waste water from automobile paint shops, including the use of aqueous waste solvents generated when cleaning spray guns and paint lines with aqueous solvents. The aqueous waste solvent mainly contains complex components such as paint, organic solvent, surfactant, curing agent and the like, and the CODcr content is about 30-80 ten thousand mg/L. At present, according to the feedback of each large coating workshop, the aqueous waste solvent is basically entrusted to qualified companies as dangerous waste for incineration treatment, and the treatment cost is quite high. Aiming at the novel industrial wastewater, the conventional treatment process firstly adopts coagulating sedimentation to remove components such as paint, curing agent and the like in the wastewater, the coagulating supernatant is further subjected to high-level oxidation technology to remove organic matters in the coagulating supernatant, and then the effluent enters a biochemical treatment system in a factory for further treatment, so that the discharge standard of a nano tube is reached. At present, the existing treatment methods such as a biochemical method, a low-temperature evaporation technology, an advanced oxidation technology, a reverse osmosis membrane method and the like have various problems of too high organic load, azeotropy of water and organic matters, unstable operation, too high cost, intolerance of membrane materials and the like, so that the engineering application cannot be realized. Therefore, the development of an efficient, environment-friendly, economical and stable process for treating the aqueous waste solvent becomes a difficult point in the environment-friendly industry.
The aqueous waste solvent mainly contains complex components such as paint, organic solvent, surfactant, curing agent and the like, and the CODcr content is about 30-60 ten thousand mg/L. According to the feedback of each large painting workshop, the aqueous waste solvent is basically entrusted to qualified companies as dangerous waste for incineration treatment, and the treatment cost per ton is about 3800-5000 yuan. At present, the existing treatment methods such as a biochemical method, a low-temperature evaporation technology, an advanced oxidation technology, a reverse osmosis membrane method and the like have various problems of too high organic load, azeotropy of water and organic matters, unstable operation, too high cost, long service life of membrane materials and the like, so that the engineering application cannot be realized. The pervaporation membrane technology appearing in recent years can realize the reduction and recycling engineering application of the aqueous waste solvent, but the phenomenon of too fast attenuation of the membrane separation performance occurs in the practical application process, so that the membrane is frequently replaced, and the operation cost is greatly increased. The reason is that the curing agent and the resin in the aqueous waste solvent can not be completely removed through coagulating sedimentation, and are precipitated on the surface of the membrane after being heated, so that the separation performance and the service life of the pervaporation membrane are greatly and negatively influenced.
Aiming at the problems that the curing agent and resin remained after coagulation of the waste water influence the membrane separation performance, the service life and the like in the process of treating the water-based waste solvent for automobile coating by the existing pervaporation technology, the invention provides a treatment method and a treatment device for the water-based waste solvent for automobile coating, which greatly reduce the membrane pollution problem, prolong the membrane service life, reduce the cost for membrane replacement and ensure the stable operation of a pervaporation membrane unit.
Disclosure of Invention
The invention aims to provide a method and a device for treating an aqueous waste solvent, aiming at the defects in the prior art.
In order to realize the purpose, the invention adopts the technical scheme that:
the first aspect of the present invention provides a method for treating an aqueous waste solvent, comprising the steps of:
s1, conveying the aqueous waste solvent into a coagulation reaction device, conveying a proper amount of coagulant into the coagulation reaction device, conveying the supernatant into a reduced pressure distillation device after the aqueous waste solvent is completely reacted by stirring, and conveying the precipitated sludge into a filter pressing device;
s2, after the precipitated sludge is subjected to pressure filtration, conveying the filtrate to the reduced pressure distillation device, and conveying the mud cake to an external treatment working section;
s3, after the supernatant and the filtrate are subjected to reduced pressure distillation, conveying the distilled weak solution to a pervaporation device, and conveying the distilled thick solution to the external treatment section;
and S4, after the distillation weak liquor is subjected to pervaporation, conveying the permeation weak liquor to a wastewater treatment section, and conveying the permeation concentrated liquor to the external treatment section.
Preferably, in the coagulation reaction device, the stirring speed is 200-400 r/min, the reaction pH is 6-8, the reaction time is 15-45 min, and the standing time is 15-45 min.
Preferably, in the reduced pressure distillation device, the recovery rate of the wastewater is 90-95%, the pH of the inlet water is 6-8, the reaction temperature is 20-40 ℃, the vacuum degree is 500-5000 Pa, and the condensation temperature is 10-30 ℃.
Preferably, in the infiltration and gasification device, the pH value of inlet water is 6-8, the reaction temperature is 45-65 ℃, the vacuum degree is 500-5000 Pa, and the condensation temperature is-10 ℃.
A second aspect of the present invention provides a treatment system for an aqueous waste solvent, which is suitable for the treatment method described above, comprising: the system comprises a coagulation reaction device, a reduced pressure distillation device, a pervaporation device, a filter pressing device, a first liquid storage device, a third liquid storage device and a fourth liquid storage device;
the first liquid storage device is connected with the coagulation reaction device, a liquid outlet of the coagulation reaction device is connected with the reduced pressure distillation device, a first liquid outlet of the reduced pressure distillation device is connected with the pervaporation device, a first liquid outlet of the pervaporation device is connected with the third liquid storage device, and the third liquid storage device is connected with a wastewater treatment section;
the sewage draining outlet of the coagulation reaction device is connected with the filter pressing device, and the liquid outlet of the filter pressing device is connected with the reduced pressure distillation device; a sludge discharge port of the filter pressing device is connected with an external treatment working section; a second liquid outlet of the reduced pressure distillation device is connected with the fourth liquid storage device, and the fourth liquid storage device is connected with the external treatment section; the second liquid outlet of the pervaporation device is connected with the fourth liquid storage device;
wherein, the connection is a pipeline connection.
Preferably, the method further comprises the following steps: and the stirring device is arranged in the coagulation reaction device.
Preferably, the method further comprises the following steps: a heating device and a second liquid storage device;
the first liquid outlet of the reduced pressure distillation device is connected with the second liquid storage device, the second liquid storage device is connected with the heating device, and the heating device is connected with the pervaporation device;
wherein the connections are all pipeline connections.
Preferably, the method further comprises the following steps: a first liquid pump, a second liquid pump, a third liquid pump, a fourth liquid pump, and a sixth liquid pump;
the first liquid pump is arranged on a connecting pipeline between the first liquid storage device and the coagulation reaction device; the second liquid pump is arranged on a connecting pipeline of the coagulation reaction device and the reduced pressure distillation device; the third liquid pump is arranged on a connecting pipeline between the coagulation reaction device and the filter pressing device; the fourth liquid pump is arranged on a connecting pipeline between the reduced pressure distillation device and the fourth liquid storage device; and the sixth liquid pump is arranged on a connecting pipeline between the third liquid storage device and the wastewater treatment section.
Preferably, the method further comprises the following steps: a fifth liquid pump;
the fifth liquid pump is arranged on a connecting pipeline between the second liquid storage device and the heating device.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the treatment method of the aqueous waste solvent can solve the problem of the outlet of the hazardous wastes with low cost, high stability and high benefit, and can better realize the environmental protection reduction and resource benefits; compared with the outsourcing treatment or the existing methods such as low-temperature evaporation, advanced oxidation technology, reverse osmosis membrane method and the like, the treatment method disclosed by the invention has the advantages of strong economy, environmental protection benefit, system stability and scientific prospect; compared with the method that the effluent after the coagulation of the water-based waste solvent directly enters the pervaporation membrane, the method adopting the reduced pressure distillation pretreatment can greatly reduce the problem of membrane pollution, prolong the service life of the membrane, greatly reduce the cost for replacing the membrane and ensure the stable operation of the pervaporation membrane unit.
Drawings
FIG. 1 is a process flow diagram of an aqueous waste solvent treatment method according to the present invention;
FIG. 2 is a schematic view showing the construction of an aqueous waste solvent treatment apparatus according to the present invention;
wherein the reference numerals include: a coagulation reaction device 1; a reduced pressure distillation apparatus 2; a pervaporation device 3; a filter pressing device 4; a stirring device 5; a heating device 6; a first reservoir 7; a second reservoir 8; a third liquid storage device 9; a fourth liquid storage device 10; a first liquid pump 11; a second liquid pump 12; a third liquid pump 13; a fourth liquid pump 14; a fifth liquid pump 15; a sixth liquid pump 16.
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 obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Example 1
As shown in fig. 1, the present embodiment provides a method for treating an aqueous waste solvent, comprising the steps of:
s1, conveying the aqueous waste solvent into a coagulation reaction device 1, conveying a proper amount of coagulant into the coagulation reaction device 1, conveying the supernatant into a reduced pressure distillation device 2 after the aqueous waste solvent is completely reacted by stirring, and conveying the precipitated sludge into a filter pressing device 4;
in the coagulation reaction device 1, the stirring speed is 200 r/min-400 r/min, the reaction pH is 6-8, the reaction time is 15 min-45 min, and the standing time is 15 min-45 min;
s2, after the precipitated sludge is subjected to pressure filtration, conveying the filtrate to the reduced pressure distillation device 2, and conveying the mud cake to an external treatment working section;
wherein, in the reduced pressure distillation device 2, the recovery rate of the wastewater is 90-95%, the pH of the inlet water is 6-8, the reaction temperature is 20-40 ℃, the vacuum degree is 500-5000 Pa, and the condensation temperature is 10-30 ℃;
s3, after the supernatant and the filtrate are subjected to reduced pressure distillation, conveying the distilled weak solution to a pervaporation device 3, and conveying the distilled thick solution to the external treatment section;
in the pervaporation device 3, the pH of inlet water is 6-8, the reaction temperature is 45-65 ℃, the vacuum degree is 500-5000 Pa, and the condensation temperature is-10 ℃;
and S4, after the distillation weak liquor is subjected to pervaporation, conveying the permeation weak liquor to a wastewater treatment section, and conveying the permeation concentrated liquor to the external treatment section.
Example 2
As shown in fig. 2, the present embodiment provides a system for treating an aqueous waste solvent, which is suitable for the treatment method according to embodiment 1, and comprises: the system comprises a coagulation reaction device 1, a reduced pressure distillation device 2, a pervaporation device 3, a filter pressing device 4, a stirring device 5, a heating device 6, a first liquid storage device 7, a second liquid storage device 8, a third liquid storage device 9, a fourth liquid storage device 10, a first liquid pump 11, a second liquid pump 12, a third liquid pump 13, a fourth liquid pump 14, a fifth liquid pump 15 and a sixth liquid pump 16;
the first liquid storage device 7 is connected with the coagulation reaction device 1, the liquid outlet of the coagulation reaction device 1 is connected with the reduced pressure distillation device 2, the first liquid outlet of the reduced pressure distillation device 2 is connected with the second liquid storage device 8, the second liquid storage device 8 is connected with the heating device 6, the heating device 6 is connected with the pervaporation device 3, the first liquid outlet of the pervaporation device 3 is connected with the third liquid storage device 9, and the third liquid storage device 9 is connected with a wastewater treatment section;
wherein, the sewage outlet of the coagulation reaction device 1 is connected with the filter pressing device 4, and the liquid outlet of the filter pressing device 4 is connected with the reduced pressure distillation device 2; a sludge discharge port of the filter pressing device 4 is connected with an external treatment working section; a second liquid outlet of the reduced pressure distillation device 2 is connected with the fourth liquid storage device 10, and the fourth liquid storage device 10 is connected with the external treatment section; a second liquid outlet of the pervaporation device 3 is connected with the fourth liquid storage device 10;
wherein, the stirring device 5 is arranged in the coagulation reaction device 1; the first liquid pump 11 is arranged on a connecting pipeline between the first liquid storage device 7 and the coagulation reaction device 1; the second liquid pump 12 is arranged on a connecting pipeline between the coagulation reaction device 1 and the reduced pressure distillation device 2; the third liquid pump 13 is arranged on a connecting pipeline between the coagulation reaction device 1 and the filter pressing device 4; the fourth liquid pump 14 is arranged on a connecting pipeline between the reduced pressure distillation device 2 and the fourth liquid storage device 10; the fifth liquid pump 15 is arranged on a connecting pipeline between the second liquid storage device 8 and the heating device 6; the sixth liquid pump 16 is arranged on a connecting pipeline between the third liquid storage device 9 and the wastewater treatment section;
wherein the connections are all pipeline connections.
Application example 1
The aqueous waste solvent from a coating workshop of a certain host factory in Shanghai is a grey turbid liquid, the concentration of the organic solvent is about 8-10%, the organic solvent mainly comprises ethylene glycol monobutyl ether, and the balance of alcohols, resin, a surfactant, a curing agent and the like, and the CODcr value is 40-60 ten thousand mg/L;
the aqueous waste solvent is conveyed into a coagulation reaction device 1 through a first liquid pump 11, and a proper amount of coagulant PAC and flocculant PAM are sequentially added to remove substances such as resin, curing agent and aqueous paint in water, so that the CODcr value is initially reduced; the CODcr value of the supernatant liquid conveyed to the reduced pressure distillation device 2 by the second liquid pump 12 is about 18 to 20 ten thousand mg/L; the CODcr value of the distilled thin liquid is about 15-18 ten thousand mg/L, and the distilled thin liquid is heated to 45-65 ℃ by a fifth liquid pump 15 and a heating device 6 and then is conveyed into a pervaporation device 3; the CODcr value of the obtained permeation diluted liquid is about 5-6 ten thousand mg/L, and can be directly conveyed to a wastewater treatment working section for disposal and then discharged after reaching the standard, and the CODcr value of the obtained permeation concentrated liquid is about 60-80 ten thousand mg/L, and can be directly conveyed to a coating workshop to be used as a cleaning agent.
Application example 2
The aqueous waste solvent from a coating workshop of a Ningbo host factory is a grey turbid liquid, the concentration of the organic solvent is about 5-8%, the organic solvent mainly comprises diethylene glycol monobutyl ether, and the balance of alcohols, resin, a surfactant, a curing agent and the like, and the CODcr value is about 40 ten thousand mg/L;
the aqueous waste solvent is conveyed into a coagulation reaction device 1 through a first liquid pump 11, and a proper amount of coagulant and flocculant are sequentially added to remove substances such as resin, curing agent and aqueous paint in water, so that the CODcr value is initially reduced; the CODcr value of the supernatant liquid conveyed to the reduced pressure distillation device 2 by the second liquid pump 12 is about 15-18 ten thousand mg/L; the CODcr value of the distilled thin liquid is about 6-8 ten thousand mg/L, and the distilled thin liquid is heated to 45-65 ℃ by a fifth liquid pump 15 and a heating device 6 and then is conveyed into a pervaporation device 3; the CODcr value of the obtained permeating thin liquid is about 2-3 ten thousand mg/L, the permeating thin liquid can be directly conveyed to a waste water treatment working section to be treated and then discharged after reaching the standard, and the CODcr value of the obtained permeating thick liquid is about 30-40 ten thousand mg/L, and the permeating thick liquid can be directly conveyed to a coating workshop to be used as a cleaning agent.
Application example 3
The aqueous waste solvent from a coating workshop of a certain host factory in Ningbo Hangzhou Bay is black gray turbid liquid, the concentration of the organic solvent is about 5-8%, the organic solvent mainly comprises diethylene glycol hexyl ether, and the balance of alcohols, resin, surfactant, curing agent and the like, and the CODcr value is about 18 ten thousand mg/L;
the aqueous waste solvent is conveyed into a coagulation reaction device 1 through a first liquid pump 11, and a proper amount of coagulant and flocculant are sequentially added to remove substances such as resin, curing agent and aqueous paint in water, so that the CODcr value is initially reduced; the CODcr value of the supernatant liquid delivered to the reduced pressure distillation apparatus 2 by the second liquid pump 12 is about 7-8 ten thousand mg/L; the CODcr value of the distilled thin liquid is about 2-3 ten thousand mg/L, and the distilled thin liquid is heated to 45-65 ℃ by a fifth liquid pump 15 and a heating device 6 and then is conveyed into a pervaporation device 3; the CODcr value of the obtained permeation thin liquid is about 5000 mg/L-10000 mg/L, the obtained permeation thin liquid can be directly conveyed to a waste water treatment working section to be treated and then discharged after reaching the standard, the CODcr value of the obtained permeation thick liquid is about 14 ten thousand mg/L, the obtained permeation thick liquid is conveyed to a pervaporation device 3, the CODcr value of the obtained permeation thin liquid is about 2 ten thousand mg/L-3 ten thousand mg/L, the obtained permeation thin liquid can also be directly conveyed to the waste water treatment working section to be treated and discharged after reaching the standard, and the CODcr value of the obtained permeation thick liquid is about 40 ten thousand mg/L and can be directly conveyed to a coating workshop to be used as a cleaning agent.
The treatment method of the aqueous waste solvent can solve the problem of the outlet of the hazardous wastes with low cost, high stability and high benefit, and can better realize the environmental protection reduction and resource benefits; compared with the outsourcing treatment or the existing methods such as low-temperature evaporation, advanced oxidation technology, reverse osmosis membrane method and the like, the treatment method disclosed by the invention has the advantages of strong economy, environmental protection benefit, system stability and scientific prospect; compared with the method that the effluent after the coagulation of the water-based waste solvent directly enters the pervaporation membrane, the method adopting the reduced pressure distillation pretreatment method can greatly reduce the problem of membrane pollution, prolong the service life of the membrane, greatly reduce the cost for membrane replacement and ensure the stable operation of the pervaporation membrane unit.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A method for treating an aqueous waste solvent, comprising the steps of:
s1, conveying the aqueous waste solvent into a coagulation reaction device (1), conveying a proper amount of coagulant into the coagulation reaction device (1), after the aqueous waste solvent is completely stirred and reacts, conveying the supernatant into a reduced pressure distillation device (2), and conveying the precipitated sludge into a pressure filtration device (4);
s2, after the filter pressing of the precipitated sludge is finished, conveying filtrate to the reduced pressure distillation device (2), and conveying mud cakes to an external treatment working section;
s3, after the supernatant and the filtrate are subjected to reduced pressure distillation, conveying the distilled weak solution to a pervaporation device (3), and conveying the distilled concentrated solution to the external treatment section;
and S4, after the distillation weak liquor is subjected to pervaporation, conveying the permeation weak liquor to a wastewater treatment section, and conveying the permeation concentrated liquor to the external treatment section.
2. The treatment method according to claim 1, wherein in the coagulation reaction device (1), the rotation speed of stirring is 200r/min to 400r/min, the pH of the reaction is 6 to 8, the reaction time is 15min to 45min, and the standing time is 15min to 45 min.
3. The treatment method according to claim 1, wherein in the reduced pressure distillation apparatus (2), the recovery rate of wastewater is 90 to 95%, the pH of inlet water is 6 to 8, the reaction temperature is 20 to 40 ℃, the vacuum degree is 500 to 5000Pa, and the condensation temperature is 10 to 30 ℃.
4. The treatment method according to claim 1, wherein in the pervaporation device (3), the pH of inlet water is 6 to 8, the reaction temperature is 45 to 65 ℃, the vacuum degree is 500 to 5000Pa, and the condensation temperature is-10 to 10 ℃.
5. A treatment system for an aqueous waste solvent, which is adapted for the treatment method according to any one of claims 1 to 4, comprising: a coagulation reaction device (1), a reduced pressure distillation device (2), a pervaporation device (3), a filter pressing device (4), a first liquid storage device (7), a third liquid storage device (9) and a fourth liquid storage device (10);
the first liquid storage device (7) is connected with the coagulation reaction device (1), a liquid outlet of the coagulation reaction device (1) is connected with the reduced pressure distillation device (2), a first liquid outlet of the reduced pressure distillation device (2) is connected with the pervaporation device (3), a first liquid outlet of the pervaporation device (3) is connected with the third liquid storage device (9), and the third liquid storage device (9) is connected with a wastewater treatment section;
wherein, a sewage discharge outlet of the coagulation reaction device (1) is connected with the filter pressing device (4), and a liquid outlet of the filter pressing device (4) is connected with the reduced pressure distillation device (2); the sludge discharge port of the filter pressing device (4) is connected with an external treatment working section; a second liquid outlet of the reduced pressure distillation device (2) is connected with a fourth liquid storage device (10), and the fourth liquid storage device (10) is connected with the external treatment working section; a second liquid outlet of the pervaporation device (3) is connected with the fourth liquid storage device (10);
wherein, the connection is a pipeline connection.
6. The processing system of claim 5, further comprising: and the stirring device (5) is arranged in the coagulation reaction device (1).
7. The processing system of claim 5, further comprising: a heating device (6) and a second liquid storage device (8);
the first liquid outlet of the reduced pressure distillation device (2) is connected with the second liquid storage device (8), the second liquid storage device (8) is connected with the heating device (6), and the heating device (6) is connected with the pervaporation device (3);
wherein the connections are all pipeline connections.
8. The processing system of claim 5, further comprising: a first liquid pump (11), a second liquid pump (12), a third liquid pump (13), a fourth liquid pump (14), and a sixth liquid pump (16);
the first liquid pump (11) is arranged on a connecting pipeline of the first liquid storage device (7) and the coagulation reaction device (1); the second liquid pump (12) is arranged on a connecting pipeline of the coagulation reaction device (1) and the reduced pressure distillation device (2); the third liquid pump (13) is arranged on a connecting pipeline between the coagulation reaction device (1) and the filter pressing device (4); the fourth liquid pump (14) is arranged on a connecting pipeline between the reduced pressure distillation device (2) and the fourth liquid storage device (10); and the sixth liquid pump (16) is arranged on a connecting pipeline between the third liquid storage device (9) and the wastewater treatment section.
9. The processing system of claim 7, further comprising: a fifth liquid pump (15);
the fifth liquid pump (15) is arranged on a connecting pipeline between the second liquid storage device (8) and the heating device (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355257.3A CN114772825A (en) | 2022-04-01 | 2022-04-01 | Treatment method and treatment device for aqueous waste solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210355257.3A CN114772825A (en) | 2022-04-01 | 2022-04-01 | Treatment method and treatment device for aqueous waste solvent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114772825A true CN114772825A (en) | 2022-07-22 |
Family
ID=82426883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210355257.3A Pending CN114772825A (en) | 2022-04-01 | 2022-04-01 | Treatment method and treatment device for aqueous waste solvent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114772825A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183807A (en) * | 1986-02-07 | 1987-08-12 | Nippon Kokan Kk <Nkk> | Device for liquid separation from raw liquid |
| JP2006151821A (en) * | 2004-11-25 | 2006-06-15 | Toray Ind Inc | Method of recovering solvent |
| CN108395043A (en) * | 2018-03-29 | 2018-08-14 | 四川高绿平环境科技有限公司 | A kind of organic liquid waste treatment technology |
| CN110092540A (en) * | 2019-05-07 | 2019-08-06 | 上海电气集团股份有限公司 | A kind of water paint waste water treatment system and application method |
| CN112999884A (en) * | 2021-04-02 | 2021-06-22 | 上海电气集团股份有限公司 | Pervaporation membrane, preparation method thereof and treatment method of coating wastewater |
| CN113754172A (en) * | 2021-09-28 | 2021-12-07 | 南通友拓新能源科技有限公司 | Polycrystalline silicon wastewater treatment method |
| CN114057337A (en) * | 2020-07-29 | 2022-02-18 | 上海依科绿色工程有限公司 | Separation and purification method of aqueous waste solvent |
| CN114804477A (en) * | 2022-04-01 | 2022-07-29 | 上海电气集团股份有限公司 | Recycling treatment method of aqueous waste solvent |
-
2022
- 2022-04-01 CN CN202210355257.3A patent/CN114772825A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183807A (en) * | 1986-02-07 | 1987-08-12 | Nippon Kokan Kk <Nkk> | Device for liquid separation from raw liquid |
| JP2006151821A (en) * | 2004-11-25 | 2006-06-15 | Toray Ind Inc | Method of recovering solvent |
| CN108395043A (en) * | 2018-03-29 | 2018-08-14 | 四川高绿平环境科技有限公司 | A kind of organic liquid waste treatment technology |
| CN110092540A (en) * | 2019-05-07 | 2019-08-06 | 上海电气集团股份有限公司 | A kind of water paint waste water treatment system and application method |
| CN114057337A (en) * | 2020-07-29 | 2022-02-18 | 上海依科绿色工程有限公司 | Separation and purification method of aqueous waste solvent |
| CN112999884A (en) * | 2021-04-02 | 2021-06-22 | 上海电气集团股份有限公司 | Pervaporation membrane, preparation method thereof and treatment method of coating wastewater |
| CN113754172A (en) * | 2021-09-28 | 2021-12-07 | 南通友拓新能源科技有限公司 | Polycrystalline silicon wastewater treatment method |
| CN114804477A (en) * | 2022-04-01 | 2022-07-29 | 上海电气集团股份有限公司 | Recycling treatment method of aqueous waste solvent |
Non-Patent Citations (1)
| Title |
|---|
| 宋伟杰;杭晓风;万印华;: "膜技术在化工废水处理中的应用", 中国工程科学, vol. 1, no. 12, pages 142 - 77 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106830562B (en) | Petrochemical industry industrial wastewater treatment integrated process system and method | |
| CN1834041A (en) | Aqueous ink wastewater treatment technique | |
| CN111807617A (en) | Water-based paint waste liquid treatment and recycling system and method | |
| CN105439386B (en) | Deep treatment method and device for hazardous waste physical and chemical treatment unit | |
| CN101168457A (en) | Technique for treating chemical fibre alkali decrement waste water | |
| CN109761386B (en) | Water paint washs useless solvent processing apparatus | |
| CN106064864A (en) | A kind of process reclaiming propylene glycol from epoxy propane waste water | |
| CN114772825A (en) | Treatment method and treatment device for aqueous waste solvent | |
| CN101070211B (en) | Circuit-board waste-water reutilizing process of reducing waste | |
| CN204325081U (en) | A kind for the treatment of system of waste water from dyestuff | |
| CN112624517A (en) | Coating industry sewage treatment process | |
| CN114804477B (en) | Recycling treatment method of aqueous waste solvent | |
| CN110818168A (en) | Smoke washing wastewater zero-discharge technical treatment system and method | |
| CN101891322A (en) | Method for treating recycling water by combining electrochemical oxidation and double-membrane methods | |
| CN216662749U (en) | Water based paint cleaning waste liquid's processing and comprehensive utilization system | |
| CN101659486A (en) | New technique for deeply treating industrial waste water by RO membrane | |
| CN101863532B (en) | Film processing method of chemico-mechanical pulp squeezed filtrate | |
| CN111333230A (en) | Method and system for recovering solvent from coagulation bath waste liquid | |
| CN106673134A (en) | Ultra-filtration functional water treatment system based on bionic molecular gill | |
| CN113003785A (en) | Method for treating heavy alcohol kettle bottom liquid based on catalytic wet oxidation method | |
| CN113385036A (en) | Classified recovery device and method for ultrafiltration drainage | |
| CN116282722A (en) | Water-based waste solvent treatment system and method thereof | |
| CN108249674B (en) | Pickling waste liquid treatment and resource utilization device and method | |
| CN111394166A (en) | Recycling method of copper-nickel-containing cutting fluid | |
| CN111847733A (en) | Efficient treatment process for coating wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |