CN111018224A - Zero discharge process for waste water containing high-concentration PVP - Google Patents
Zero discharge process for waste water containing high-concentration PVP Download PDFInfo
- Publication number
- CN111018224A CN111018224A CN201911381707.0A CN201911381707A CN111018224A CN 111018224 A CN111018224 A CN 111018224A CN 201911381707 A CN201911381707 A CN 201911381707A CN 111018224 A CN111018224 A CN 111018224A
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- Prior art keywords
- water tank
- ultrafiltration
- reverse osmosis
- wastewater
- spray drying
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
Abstract
The invention discloses a zero discharge process of high-concentration PVP (polyvinyl pyrrolidone) -containing wastewater, which comprises an ultrafiltration membrane treatment system, a reverse osmosis membrane treatment system, a triple-effect evaporative crystallization system and a spray drying system, wherein the ultrafiltration membrane treatment system comprises a mother liquor regulating water tank and a rinsing water regulating water tank, an ultrafiltration concentrated water tank A and an ultrafiltration concentrated water tank B, an ultrafiltration membrane component A and an ultrafiltration membrane component B, an ultrafiltration product water tank A and an ultrafiltration product water tank B, the reverse osmosis membrane treatment system comprises a reverse osmosis concentrated water tank, a reverse osmosis membrane component and a reverse osmosis product water tank, the triple-effect evaporative crystallization system comprises a triple-effect evaporator, an evaporation water outlet tank and a centrifugal machine, and the spray drying system comprises a spray water tank and spray drying. Has the advantages that: the invention adopts a process flow combining an ultrafiltration membrane treatment system, a reverse osmosis membrane treatment system, a triple effect evaporation crystallization system and a spray drying system, and realizes zero discharge of the high-concentration PVP wastewater zero discharge treatment process.
Description
Technical Field
The invention relates to the technical field of high-concentration PVP wastewater zero-discharge treatment processes, in particular to a high-concentration PVP wastewater zero-discharge process.
Background
The silver powder recovery production process uses polyvinylpyrrolidone (PVP) as a reaction material, so that cleaning wastewater is generated when the material is cleaned, a mother liquor reaction tank generates high-concentration mother liquor wastewater, and the wastewater contains a large amount of PVP chemical substances. The material has the characteristics of high COD, high total nitrogen and high conductivity, thereby bringing huge pollution to the ecological environment. The traditional biochemical reaction for treating the wastewater is difficult to treat and reach the standard, and the physicochemical reaction is difficult to ensure that the high concentration COD and the high total nitrogen of the wastewater reach the discharge standard. Therefore, I explore a process for treating the wastewater to reach the standard by using a novel membrane treatment technology and realizing zero emission.
Therefore, a zero discharge process of waste water containing high-concentration PVP is provided.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a zero discharge process for waste water containing high-concentration PVP.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a contain high concentration PVP waste water zero release technology, milipore filter processing system, reverse osmosis membrane processing system, triple effect evaporation crystal system and spray drying system, a serial communication port, milipore filter processing system includes mother liquor regulation water tank and rinsing water regulation water tank, ultrafiltration concentrated water tank A and ultrafiltration concentrated water tank B, milipore filter subassembly A and milipore filter subassembly B, the water tank A is produced in the ultrafiltration and the water tank B is produced in the ultrafiltration, reverse osmosis membrane processing system includes reverse osmosis concentrated water tank, reverse osmosis membrane subassembly and reverse osmosis product water tank, triple effect evaporation crystal system includes triple effect evaporimeter, evaporation outlet tank and centrifuge, spray drying system is including taking spray water tank and spray drying equipment, and specific process flow is as follows:
s2: the mother liquor wastewater treatment process comprises the following steps: adjusting the pH of the mother liquor wastewater to be neutral, and concentrating the mother liquor wastewater by an ultrafiltration membrane treatment system;
s1: the cleaning wastewater treatment process comprises the following steps: and (4) after the pH value of the cleaning wastewater is adjusted to be neutral, concentrating the cleaning wastewater by an ultrafiltration membrane treatment system.
In the zero discharge process of the high-concentration PVP-containing wastewater, the pH of the cleaning wastewater is adjusted to the value.
Compared with the prior art, the invention has the advantages that:
1. the invention adopts a process flow combining an ultrafiltration membrane treatment system, a reverse osmosis membrane treatment system, a triple effect evaporation crystallization system and a spray drying system, and realizes zero discharge of the treatment process of high-concentration PVP wastewater;
2. the membrane separation is simple and reliable, and the energy consumption is low;
3. the invention has the advantages of low investment, low operation cost, simple equipment and easy maintenance;
4. the invention solves the problems that the high-concentration PVP wastewater cannot be subjected to an efficient and practical biochemical treatment method and equipment is blocked and materials are leaked during direct evaporation and crystallization.
Drawings
FIG. 1 is a process flow diagram of a zero discharge process for waste water containing high concentration PVP.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, a zero discharge process of waste water containing high-concentration PVP, the ultrafiltration membrane treatment system, the reverse osmosis membrane treatment system, the triple effect evaporation crystallization system and the spray drying system, wherein the ultrafiltration membrane treatment system comprises a mother liquor adjusting water tank and a rinsing water adjusting water tank, an ultrafiltration concentrated water tank a and an ultrafiltration concentrated water tank B, an ultrafiltration membrane component a and an ultrafiltration membrane component B, an ultrafiltration product water tank a and an ultrafiltration product water tank B, the reverse osmosis membrane treatment system comprises a reverse osmosis concentrated water tank, a reverse osmosis membrane component and a reverse osmosis product water tank, the triple effect evaporation crystallization system comprises a triple effect evaporator, an evaporation water outlet tank and a centrifuge, the spray drying system comprises a spray water tank and spray drying equipment, and the specific process flow is as follows:
s1: the cleaning wastewater treatment process comprises the following steps: the pH of the cleaning wastewater is adjusted to be neutral, then the cleaning wastewater is concentrated by an ultrafiltration membrane treatment system, the ultrafiltration concentrated solution is subjected to spray drying treatment by a spray drying treatment system, the ultrafiltration produced water enters a reverse osmosis membrane treatment system for concentration, and the reverse osmosis concentrated water enters an evaporative crystallization treatment system. Realizing the zero discharge treatment process of the high-concentration PVP wastewater;
1) the pH value of the cleaning wastewater is adjusted to 7, and a pH controller and a conductivity monitor are arranged in a cleaning wastewater adjusting water tank. The conductivity of the rinsing wastewater after mixing is 2500 us/cm;
2) and (3) after the pH value is adjusted, pumping into an ultrafiltration concentration water tank A, concentrating the mixed rinsing wastewater by an ultrafiltration membrane component A, setting the concentration to be 20 times, wherein the ultrafiltration permeate is 0.97T/h, the concentration is 30L/h, and the mass concentration of PVP (polyvinyl pyrrolidone) is controlled to be about 20%. Carrying out the next working procedure on the ultrafiltration permeating liquid, and carrying out spray drying on the concentrated solution;
3) concentrating the ultrafiltration permeate by a reverse osmosis membrane component until the concentration conductivity is about 37500us/cm, and the reverse osmosis produced water conductivity is lower than 300us/cm, and directly recycling or using the reverse osmosis permeate as raw water of a water purifier, wherein the reverse osmosis concentrate enters a triple-effect evaporator for evaporation and crystallization;
s2: the mother liquor wastewater treatment process comprises the following steps: after the pH value of the mother liquor wastewater is adjusted to be neutral, concentrating the mother liquor wastewater by an ultrafiltration membrane treatment system, removing a high molecular substance PVP in the mother liquor wastewater by the ultrafiltration membrane treatment system, simultaneously improving the mass concentration of the PVP in the ultrafiltration concentrated solution, and then carrying out spray drying treatment on the ultrafiltration concentrated solution by a spray drying treatment system; the ultrafiltration produced water after PVP removal enters a triple effect evaporation crystallization system for evaporation crystallization treatment, the evaporation sodium nitrate crystal salt is dried and then subjected to external treatment, and the evaporation condensate water enters a reverse osmosis membrane treatment system in the cleaning wastewater treatment process for treatment;
1) and (3) the mother liquor wastewater enters a mother liquor adjusting water tank, the pH value is adjusted to 7, the mother liquor wastewater enters an ultrafiltration membrane component B for concentration by 10 times, the ultrafiltration permeating liquid is 0.45T/h, the concentrated solution is 50L/h, and the mass concentration of PVP (polyvinyl pyrrolidone) is also controlled to be about 20%. Carrying out triple effect evaporation crystallization on the ultrafiltration permeate to form sodium nitrate crystal salt, carrying out external treatment, and carrying out spray drying on the concentrated solution;
2) and pumping the evaporated crystal water into an ultrafiltration water production tank A, and allowing the evaporated crystal water to enter a reverse osmosis system to form a closed loop.
Further, unless otherwise specifically stated or limited, the above-described fixed connection is to be understood in a broad sense, and may be, for example, welded, glued, or integrally formed as is conventional in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (2)
1. The utility model provides a contain high concentration PVP waste water zero release technology, includes milipore filter processing system, reverse osmosis membrane processing system, triple effect evaporation crystallization system and spray drying system, its characterized in that, milipore filter processing system includes mother liquor regulation water tank and rinsing water regulation water tank, ultrafiltration concentrated water tank A and ultrafiltration concentrated water tank B, milipore filter subassembly A and milipore filter subassembly B, the water tank A is produced in the ultrafiltration and the water tank B is produced in the ultrafiltration, reverse osmosis membrane processing system includes reverse osmosis concentrated water tank, reverse osmosis membrane subassembly and reverse osmosis product water tank, triple effect evaporation crystallization system includes triple effect evaporimeter, evaporation outlet tank and centrifuge, spray drying system is including taking spray water tank and spray drying equipment, and specific process flow is as follows:
s2: the mother liquor wastewater treatment process comprises the following steps: adjusting the pH of the mother liquor wastewater to be neutral, and concentrating the mother liquor wastewater by an ultrafiltration membrane treatment system;
s1: the cleaning wastewater treatment process comprises the following steps: and (4) after the pH value of the cleaning wastewater is adjusted to be neutral, concentrating the cleaning wastewater by an ultrafiltration membrane treatment system.
2. The process of claim 1, wherein the pH of the washing wastewater is adjusted to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911381707.0A CN111018224A (en) | 2019-12-27 | 2019-12-27 | Zero discharge process for waste water containing high-concentration PVP |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911381707.0A CN111018224A (en) | 2019-12-27 | 2019-12-27 | Zero discharge process for waste water containing high-concentration PVP |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811728A (en) * | 2020-12-30 | 2021-05-18 | 广东先导稀材股份有限公司 | Method for standard treatment of mother liquor for producing superfine spherical silver powder and recycling valuable components |
| CN113716774A (en) * | 2021-08-27 | 2021-11-30 | 广州昌硕环保设备有限公司 | PVP material recovery device and recovery process thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851039A (en) * | 2010-05-07 | 2010-10-06 | 哈尔滨康健科技有限公司 | Modified starch production waste water treatment method |
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2019
- 2019-12-27 CN CN201911381707.0A patent/CN111018224A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851039A (en) * | 2010-05-07 | 2010-10-06 | 哈尔滨康健科技有限公司 | Modified starch production waste water treatment method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112811728A (en) * | 2020-12-30 | 2021-05-18 | 广东先导稀材股份有限公司 | Method for standard treatment of mother liquor for producing superfine spherical silver powder and recycling valuable components |
| CN113716774A (en) * | 2021-08-27 | 2021-11-30 | 广州昌硕环保设备有限公司 | PVP material recovery device and recovery process thereof |
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Application publication date: 20200417 |