CN112499864A - Treatment method for zero discharge of wastewater - Google Patents
Treatment method for zero discharge of wastewater Download PDFInfo
- Publication number
- CN112499864A CN112499864A CN202011349851.9A CN202011349851A CN112499864A CN 112499864 A CN112499864 A CN 112499864A CN 202011349851 A CN202011349851 A CN 202011349851A CN 112499864 A CN112499864 A CN 112499864A
- Authority
- CN
- China
- Prior art keywords
- treatment
- water
- reverse osmosis
- introducing
- ultrafiltration
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Abstract
The invention relates to a treatment method for zero discharge of wastewater, which comprises the following steps: s1, introducing the wastewater into a multi-media filter for filtering; s2, introducing the water filtered by the multi-media filter into an ultrafiltration device for ultrafiltration treatment; s3, introducing the water subjected to the ultrafiltration treatment into a reverse osmosis device for reverse osmosis treatment to form available pure water capable of permeating through a reverse osmosis membrane and concentrated water incapable of permeating through the reverse osmosis membrane; s4, recycling the pure water after the reverse osmosis treatment, and introducing the concentrated water into an electrochemical oxidation treatment unit for electrochemical treatment; and S5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment. According to the invention, an electrochemical method is used for treatment before evaporative crystallization, and a low-voltage alternating electric field formed in water enables ions of the water to repeatedly migrate, so that the viscosity of the water is reduced, hydroxyl radicals generated in an anode area decolor a water body, the whiteness of salt formed by crystallization is improved, and the purpose of changing waste into valuable is realized.
Description
Technical Field
The invention relates to water treatment, in particular to a treatment method for zero discharge of wastewater.
Background
The zero-emission treatment process of the wastewater is usually an evaporation process, water is separated by evaporation, and the generated solid waste salt is treated. However, if a large amount of organic matter is contained in the waste water, the evaporation efficiency is affected, and if the molecular weight of the organic matter is large, the waste water becomes viscous even when the waste water is evaporated and concentrated to a certain extent, and further evaporation is not possible, and the life of the evaporator is also affected. The electrochemical method is a technique in which charged ions in a solution are transferred through a membrane under the action of an electric field, and the membrane has anion and cation permeation selectivity, so that separation of substances can be realized.
In the prior art of zero emission treatment of waste water, a step of membrane treatment is usually arranged between electrochemical treatment and evaporative crystallization, the waste water enters an evaporator for evaporative crystallization after membrane concentration to form inorganic salt, but in the treatment process, backwash water and membrane washing waste liquid are generated, and because the backwash water and the membrane washing waste liquid contain a large amount of organic matters and suspended matters, the problem of secondary pollution can not be directly discharged and utilized, if the organic matters are evaporated and crystallized in an evaporative crystallizer, the organic matters are amber, the surface of the crystal salt generated by evaporation can be reddened, the quality of the salt can not reach the standard of commercial salt, the salt can only be treated as solid waste, the requirement of zero emission can not be met, and the treatment cost of each ton of solid waste is expensive, so that the cost is increased.
Disclosure of Invention
Aiming at the existing defects, the invention provides a treatment method for zero discharge of wastewater.
The technical scheme adopted by the invention for solving the technical problems is as follows: a treatment method for zero discharge of wastewater comprises the following steps:
s1, introducing the wastewater into a multi-media filter for filtering;
s2, introducing the water filtered by the multi-media filter into an ultrafiltration device for ultrafiltration treatment;
s3, introducing the water subjected to the ultrafiltration treatment into a reverse osmosis device for reverse osmosis treatment to form available pure water capable of permeating through a reverse osmosis membrane and concentrated water incapable of permeating through the reverse osmosis membrane;
s4, recycling the pure water after the reverse osmosis treatment, and introducing the concentrated water into an electrochemical oxidation treatment unit for electrochemical treatment;
and S5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment.
Preferably, before the concentrated water is introduced into the electrochemical oxidation treatment unit, the method further comprises the following steps:
4a, carrying out hardness removal treatment on the concentrated water;
4b, introducing the water subjected to hardness treatment into a nanofiltration device for nanofiltration treatment;
4c, introducing the water subjected to nanofiltration treatment into a disc tube type reverse osmosis device for secondary reverse osmosis treatment;
and 4d, recycling the pure water subjected to the reverse osmosis treatment again, and introducing the concentrated water subjected to the reverse osmosis treatment again into the electrochemical oxidation treatment unit.
Preferably, the electrochemical oxidation treatment unit comprises a shell which is connected and communicated with the reverse osmosis device and the evaporative crystallizer, negative plates and positive plates which are arranged at intervals in a staggered mode are arranged in the shell, a control circuit board which is electrically connected with a power supply is arranged on the shell, and the control circuit board is electrically connected with the negative plates and the positive plates.
Preferably, the operation voltage of the electrochemical oxidation treatment unit is not more than 36V, and the operation current is 25-100A.
Preferably, the pH of the water is adjusted to 6.5-8 after the wastewater is filtered by the multimedia filter, and then the water is passed into the ultrafiltration device.
Preferably, the ultrafiltration membrane in the ultrafiltration device is a hollow fiber ultrafiltration membrane, the operating pressure of the ultrafiltration membrane is 0.11-0.3MPa, and the membrane flux is 1-500L/(m)2·h)。
Preferably, the reverse osmosis membrane in the reverse osmosis device is made of any one of polyamide, polyimide and cellulose acetate, and the operating pressure of the reverse osmosis membrane is 1-2.5 MPa.
Preferably, the method further comprises a step S6 of introducing the vapor evaporated by the evaporative crystallizer into a condensing device connected with a collecting container for collecting the condensed water, and cooling the vapor to generate condensed water.
Preferably, the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit and the evaporative crystallizer are sequentially connected and conducted through a conduit, and are respectively provided with a control valve for controlling the conduit to be conducted or closed, and the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit, the evaporative crystallizer and the corresponding control valve are electrically connected with a control host.
Preferably, the control host is connected with a remote control terminal through wireless or wired communication.
The invention has the beneficial effects that: the invention arranges the electrochemical oxidation treatment unit before the evaporation crystallization, the step of the filter membrane treatment is arranged before the electrochemical oxidation treatment unit, no other treatment process exists between the electrochemical oxidation treatment unit and the evaporation crystallization, the problem that backwash water and membrane washing waste liquid can not be treated or can directly enter the evaporation crystallizer can not occur, in the invention, backwash water and membrane washing waste liquid generated by the filter membrane treatment and concentrated water generated by the wastewater treatment can enter the electrochemical oxidation treatment unit together, a low-voltage electric field can be formed in the water in the electrochemical oxidation treatment unit, a large amount of hydroxyl radical strong oxidizing substances can be generated in an anode area of the electric field, the COD in the water can be decolored and further reduced, ions of the water can be repeatedly transferred by the formed low-voltage electric field, the viscosity of the water is reduced in the transfer process, and the evaporation of the water entering the evaporation crystallizer is more facilitated, improves the whiteness of the salt formed by evaporative crystallization, meets the commercial requirement, and realizes the purpose of changing waste into valuable.
Drawings
FIG. 1 is a block flow diagram of an embodiment of the present invention;
Detailed Description
To more clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the embodiments for clear and complete description, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention. In addition, directional terms used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer to directions only as shown in the attached drawings, and are used for better and clearer explanation and understanding of the present invention, and do not indicate or imply orientation which the present invention must have, and thus, should not be construed as limiting the present invention.
The embodiment of the invention, as shown in fig. 1, relates to a wastewater zero-discharge treatment method, which comprises the following steps:
s1, introducing the wastewater into a multi-media filter for filtering, wherein the multi-media filter can be used for filtering impurities such as fine particles, suspended matters, colloids and the like in the water, the adopted filter materials are quartz sand, anthracite, activated carbon and the like, the water quality can meet the requirements of an ultrafiltration and reverse osmosis device on the water through the filtering of the multi-media filter, the SDI of the effluent is less than or equal to 4, in practical application, the filtering of the multi-media filter can be adjusted through adjusting the flow rate of the water and carrying out the steps of backwashing, air scrubbing and forward washing of the multi-media filter for multiple times in turn according to the source of the wastewater, so that the effluent meets the requirements, the pH value of the effluent is adjusted at the same time, the pH value of the water is adjusted to 6.5-8 after the multi-media filter filters the wastewater, and then the water is introduced into the ultrafiltration device to keep the water in a neutral state, thus, the influence of over-strong acidity or alkalinity on a filter membrane used in subsequent treatment is avoided;
s2 the water filtered by the multi-medium filter is introduced into the ultrafiltration device for ultrafiltration treatment, the ultrafiltration device is the same as the conventional ultrafiltration device, small molecules smaller than the pore diameter of the membrane plate are extruded out of the membrane plate under the action of pressure, the large molecules are intercepted on the membrane plate, and the concentration of the large molecules in the water is higher and higher along with the ultrafiltration, so that a concentration gradient is formed in the solution, the problem of slow ultrafiltration speed (concentration polarization problem) is caused, the ultrafiltration is not favorable, in order to ensure the smooth and effective ultrafiltration, the ultrafiltration membrane in the ultrafiltration device is a hollow fiber ultrafiltration membrane, the operating pressure of the ultrafiltration membrane is 0.11-0.3MPa, and the membrane flux is 1-500L/(m) L2H), the hollow fiber capillary tube on the hollow fiber ultrafiltration membrane greatly increases the permeation surface area, effectively improves the ultrafiltration speed, avoids the generation of concentration polarization problem, avoids the generation of the problem that the normal operation of equipment is influenced by the rupture of the membrane wire caused by the overlarge pressure of the membrane shell and the membrane wire due to the overlarge pressure when the operation pressure is over, and simultaneously selects corresponding water according to the different water quality of inlet waterUltrafiltration membrane of membrane flux.
S3, introducing the water after ultrafiltration treatment into a reverse osmosis device for reverse osmosis treatment to form available pure water capable of penetrating through a reverse osmosis membrane and concentrated water incapable of penetrating through the reverse osmosis membrane, thus removing colloids, particles and substances with high relative molecular mass in the water through ultrafiltration, wherein the water still contains some salts and other electrolytes, then, performing reverse osmosis treatment to prevent the salts and other electrolytes from passing through the reverse osmosis membrane along with the water, further purifying the water quality, removing various impurities through the reverse osmosis membrane to obtain highly purified and available pure water, and forming concentrated water with high-concentration salt in the water incapable of penetrating through the reverse osmosis membrane, wherein the part cannot be directly utilized and needs further treatment; the reverse osmosis membrane in the reverse osmosis device is made of any one of polyamide, polyimide and cellulose acetate, the operating pressure of the reverse osmosis membrane is 1-2.5MPa, the reverse osmosis membrane has high chemical and physical stability and durability and can bear strong chemical cleaning, and the high-density hydrophilic group characteristic enables the reverse osmosis membrane to have the performance of high water yield and high salt rejection rate, and metal ions in water can be removed as much as possible through the high pressure.
S4, recycling the pure water after reverse osmosis treatment, introducing the concentrated water into an electrochemical oxidation treatment unit for electrochemical treatment, so that backwash water and membrane washing waste liquid generated during earlier stage membrane treatment can enter the electrochemical oxidation treatment unit together with the concentrated water without discharging waste water, and zero waste water is discharged, at the moment, a low-pressure alternating electric field can be formed in the water in the electrochemical oxidation treatment unit, a large amount of hydroxyl radical strong oxidizing substances can be generated in an anode area of the low-pressure alternating electric field, so that water can be decolorized, COD in the water can be further reduced, impurities influencing water hardness, such as calcium ions and the like in the water can be adsorbed on a cathode in a cathode area, ions in the water can be repeatedly transferred by the low-pressure alternating electric field formed at the same time, the viscosity of the water is reduced in the transferring process, and the purified water can enter an evaporation crystallizer more conveniently, at the moment, the operation voltage of the electrochemical oxidation treatment unit is not more than 36V, and the operation current is 25-100A, so that a large-current low-voltage environment is formed, the electrochemical oxidation treatment on water is performed more safely and efficiently, and the production efficiency is improved.
S5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment, so that the water entering the evaporative crystallizer has little other miscellaneous salts except sodium salt, and the whiteness and purity of the salt formed after evaporative crystallization are improved due to decoloration and purification through electrochemical oxidation before evaporative crystallization, thereby meeting the commercial requirement and realizing the purpose of changing waste into valuable; the treated water can be recycled, and the salt formed by crystallization can be used for commercial use, so that zero discharge of wastewater treatment is really realized.
In a further improvement, as shown in fig. 1, before the concentrated water is introduced into the electrochemical oxidation treatment unit, the method further comprises the following steps:
4a, performing hardness removal treatment on the concentrated water, namely treating the concentrated water by adopting a conventional hardness removal method, such as removing excessive impurity metal ions in the water by using a double-alkali method, so as to facilitate subsequent electrochemical treatment;
4b, introducing the water subjected to hardness treatment into a nanofiltration device for nanofiltration treatment, further removing organic matters and chromaticity in the concentrated water through nanofiltration, further reducing the hardness of the water, and simultaneously partially removing soluble salts to improve the purity of the salts formed after evaporative crystallization;
4c, introducing the water subjected to nanofiltration treatment into a disc tube type reverse osmosis device for secondary reverse osmosis treatment, and purifying impurities introduced during hardness removal, backwash water and membrane washing waste liquid generated by early-stage ultrafiltration and primary reverse osmosis treatment by the secondary reverse osmosis treatment to improve the quality of the water; the reverse osmosis of the disc tube type can not be blocked, the scaling of the membrane group is less, the membrane pollution is light, the service life is longer, the installation and the maintenance are simple, and the operation is convenient;
and 4d, recycling the pure water subjected to the reverse osmosis treatment again, and introducing the concentrated water subjected to the reverse osmosis treatment again into the electrochemical oxidation treatment unit, so that the impurities contained in the water entering the electrochemical oxidation treatment unit are fewer after the treatment of multiple steps, the electrochemical oxidation treatment is more favorably carried out, the energy can be saved, and the cost can be reduced.
The further improvement is that for the electrochemical oxidation treatment unit, the electrochemical oxidation treatment unit comprises a shell which is connected and communicated with a reverse osmosis device and an evaporation crystallizer, namely, a water inlet of the shell is connected and communicated with the reverse osmosis device, water treated by the reverse osmosis device can flow into the shell through the water inlet, meanwhile, a water outlet of the shell is connected and communicated with the evaporation crystallizer, water treated by electrochemistry flows into the evaporation crystallizer through the water outlet, cathode plates and anode plates which are arranged alternately are arranged in the shell, corresponding cathode plates and anode plates which are used as electrodes are arranged in the shell, at the moment, in order to improve the treatment efficiency, the cathode plates and the anode plates are arranged alternately, namely, an anode plate is arranged between two adjacent cathode plates, a cathode plate is arranged between two adjacent anode plates in the same principle, and a control circuit board which is electrically connected with a power supply is arranged on the shell, the control circuit board is electrically connected with the cathode plate and the anode plate, the cathode plate and the anode plate arranged in the shell are electrically connected with the control circuit board, electric power provided by the power supply is transmitted to each electrode through the control circuit board, and the control circuit board controls each electrode through the single chip microcomputer arranged on the control circuit board.
In a further improvement, the method further comprises a step S6, wherein steam evaporated by the evaporative crystallizer is guided into a condensing device for cooling to generate condensed water, and the condensing device is connected with a collecting container for collecting the condensed water, so that the condensed water is recycled, and resources are saved.
The multi-medium filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit and the evaporation crystallizer are sequentially communicated through a conduit and are all provided with control valves for controlling the conduction or the closing of the conduit, namely, the water outlet of the multi-medium filter is communicated with the water inlet of the ultrafiltration device through the conduit, the water outlet of the ultrafiltration device is communicated with the water inlet of the reverse osmosis device through the conduit, the water outlet of pure water of the reverse osmosis device is correspondingly connected into the collection equipment, the water outlet of concentrated water is communicated with the water inlet of the electrochemical oxidation treatment unit through the conduit, the water outlet of the electrochemical oxidation treatment unit is communicated with the water inlet of the evaporation crystallizer through the conduit, and therefore, water treated in each step can smoothly flow into the device in the next step. In order to effectively control each processing step, control valves are arranged between the multi-media filter and the ultrafiltration device, between the ultrafiltration device and the reverse osmosis device, between the reverse osmosis device and the electrochemical oxidation processing unit, and between the electrochemical oxidation processing unit and the evaporation crystallizer, and the conduction or the closing of the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation processing unit, the evaporation crystallizer and the corresponding control valves are controlled by controlling the control valves, so that the smooth processing flow is more favorably carried out, the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation processing unit, the evaporation crystallizer and the corresponding control valves are all electrically connected with a control host, the processing flow can be more conveniently controlled, the on-off of each control valve can be controlled on the control host, the corresponding regulation of each device can be controlled, the operation is convenient, the efficiency is higher, and the correction can be carried, and the processing conditions of all the steps can be known through the control host. The control host is connected with a remote control terminal through wireless or wired communication, for example, the control host is connected with a 5G wireless connection terminal, a short-distance WiFi or Bluetooth terminal and the like, the remote control terminal can be a computer in an office, or an intelligent device used in daily life, such as a mobile phone, a tablet and the like, information can be stored and exchanged between the control host and the remote control terminal through a cloud end, remote operation can be achieved through a corresponding software program, the water treatment process is effectively monitored, and the control host is more suitable for the requirements of modern industrial intelligent manufacturing.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A wastewater zero-discharge treatment method is characterized by comprising the following steps: the method comprises the following steps:
s1, introducing the wastewater into a multi-media filter for filtering;
s2, introducing the water filtered by the multi-media filter into an ultrafiltration device for ultrafiltration treatment;
s3, introducing the water subjected to the ultrafiltration treatment into a reverse osmosis device for reverse osmosis treatment to form available pure water capable of permeating through a reverse osmosis membrane and concentrated water incapable of permeating through the reverse osmosis membrane;
s4, recycling the pure water after the reverse osmosis treatment, and introducing the concentrated water into an electrochemical oxidation treatment unit for electrochemical treatment;
and S5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment.
2. The method for treating wastewater zero discharge according to claim 1, further comprising the steps of, before the concentrated water is introduced into the electrochemical oxidation treatment unit:
4a, carrying out hardness removal treatment on the concentrated water;
4b, introducing the water subjected to hardness treatment into a nanofiltration device for nanofiltration treatment;
4c, introducing the water subjected to nanofiltration treatment into a disc tube type reverse osmosis device for secondary reverse osmosis treatment;
and 4d, recycling the pure water subjected to the reverse osmosis treatment again, and introducing the concentrated water subjected to the reverse osmosis treatment again into the electrochemical oxidation treatment unit.
3. The method as claimed in claim 1, wherein the electrochemical oxidation unit comprises a housing connected to the reverse osmosis device and the evaporative crystallizer, the housing has cathode plates and anode plates arranged alternately, the housing has a control circuit board electrically connected to a power supply, and the control circuit board is electrically connected to the cathode plates and the anode plates.
4. The method for zero discharge of wastewater treatment according to claim 1, wherein the electrochemical oxidation treatment unit has an operating voltage of not more than 36V and an operating current of 25-100A.
5. The method for treating wastewater with zero discharge according to claim 1, wherein the pH of the wastewater is adjusted to 6.5-8 after the wastewater is filtered by the multi-media filter, and then the wastewater is introduced into the ultrafiltration device.
6. The method of claim 1, wherein the ultrafiltration membrane of the ultrafiltration device is a hollow fiber ultrafiltration membrane, the operating pressure of the ultrafiltration membrane is 0.11-0.3MPa, and the membrane flux is 1-500L/(m) m2·h)。
7. The method according to claim 1, wherein the reverse osmosis membrane is made of any one of polyamide, polyimide and cellulose acetate, and the operating pressure is 1-2.5 MPa.
8. The method of claim 1, further comprising a step S6 of cooling the vapor evaporated from the evaporative crystallizer in a condensing unit connected to a collecting container for collecting the condensed water.
9. The method for treating wastewater zero discharge according to claim 1, wherein the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit and the evaporation crystallizer are sequentially connected and conducted through a conduit and are respectively provided with a control valve for controlling the conduit to be conducted or closed, and the multi-media filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit, the evaporation crystallizer and the corresponding control valves are respectively and electrically connected with a control host.
10. The method for zero discharge of wastewater treatment according to claim 9, wherein the control host is connected to a remote control terminal through wireless or wired communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011349851.9A CN112499864A (en) | 2020-11-26 | 2020-11-26 | Treatment method for zero discharge of wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011349851.9A CN112499864A (en) | 2020-11-26 | 2020-11-26 | Treatment method for zero discharge of wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112499864A true CN112499864A (en) | 2021-03-16 |
Family
ID=74966369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011349851.9A Pending CN112499864A (en) | 2020-11-26 | 2020-11-26 | Treatment method for zero discharge of wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112499864A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162361A (en) * | 1996-02-14 | 2000-12-19 | Adiga; Mahabala R. | Plating waste water treatment and metals recovery system |
| CN102583862A (en) * | 2012-02-22 | 2012-07-18 | 北京纬纶华业环保科技股份有限公司 | Method and system for treating saline wastewater to zero discharge and recycling |
| CN105565569A (en) * | 2016-01-30 | 2016-05-11 | 内蒙古久科康瑞环保科技有限公司 | Intensified deep concentration system for high-salt-content industrial wastewater and technology thereof |
| CN205313251U (en) * | 2015-12-22 | 2016-06-15 | 左青 | Coal chemical wastewater advanced treatment recycling system |
| CN106044951A (en) * | 2016-07-25 | 2016-10-26 | 江苏久吾高科技股份有限公司 | Recycling method and device of industrial acidic wastewater |
| CN111470694A (en) * | 2020-04-17 | 2020-07-31 | 联邦制药(内蒙古)有限公司 | Zero-discharge reclaimed water recycling process and system for pharmaceutical wastewater |
-
2020
- 2020-11-26 CN CN202011349851.9A patent/CN112499864A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162361A (en) * | 1996-02-14 | 2000-12-19 | Adiga; Mahabala R. | Plating waste water treatment and metals recovery system |
| CN102583862A (en) * | 2012-02-22 | 2012-07-18 | 北京纬纶华业环保科技股份有限公司 | Method and system for treating saline wastewater to zero discharge and recycling |
| CN205313251U (en) * | 2015-12-22 | 2016-06-15 | 左青 | Coal chemical wastewater advanced treatment recycling system |
| CN105565569A (en) * | 2016-01-30 | 2016-05-11 | 内蒙古久科康瑞环保科技有限公司 | Intensified deep concentration system for high-salt-content industrial wastewater and technology thereof |
| CN106044951A (en) * | 2016-07-25 | 2016-10-26 | 江苏久吾高科技股份有限公司 | Recycling method and device of industrial acidic wastewater |
| CN111470694A (en) * | 2020-04-17 | 2020-07-31 | 联邦制药(内蒙古)有限公司 | Zero-discharge reclaimed water recycling process and system for pharmaceutical wastewater |
Non-Patent Citations (3)
| Title |
|---|
| 《环保工作者实用手册》编写组: "《环保工作者实用手册》", 30 November 1984, 冶金工业出版社 * |
| 吕清文等: "《物理化学》", 30 June 2018, 天津科学技术出版社 * |
| 宋永辉等: "《提金氰化废水处理理论与方法》", 31 March 2015, 冶金工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108203197B (en) | Processing system who contains salt waste water | |
| US5593563A (en) | Electrodeionization process for purifying a liquid | |
| CN106430773B (en) | Treatment method of high-salt-content industrial wastewater with different ion concentrations | |
| CN106396228A (en) | Device and method for treating industrial wastewater with high salt content | |
| MX2007004923A (en) | Edi concentrate recycle loop with filtration module. | |
| CN105692989B (en) | The comprehensive utilization process of viscose fiber acid waste water | |
| KR101389450B1 (en) | Desalination apparatus and desalinating method thereof | |
| JPWO2005123606A1 (en) | Liquid processing equipment | |
| CN105198133A (en) | Ultra-pure water preparation system and method capable of preventing electrodeionization device from scaling | |
| CN102863055A (en) | Desalting system and method | |
| CN116924627A (en) | Salt lake lithium extraction and silicon removal system and method | |
| CN113026003A (en) | Reduction regeneration method for chemical nickel plating aging solution | |
| CN111252968A (en) | Method for concentrating copper sulfate by using membrane technology | |
| CN113003674A (en) | Method for preparing crude sodium salt solution from concentrated seawater | |
| CN210915600U (en) | Recycling device of RO strong brine | |
| CN112499864A (en) | Treatment method for zero discharge of wastewater | |
| CN217119879U (en) | Electrodialysis desalination system of purification glufosinate-ammonium | |
| CN217051729U (en) | Water body deionization filter | |
| WO2022109892A1 (en) | Zero-discharge wastewater treatment method | |
| CN212151700U (en) | Water filtration and purification system based on multi-group ion exchange and water purifier | |
| CN103435015B (en) | Technique and device for extracting sulfuric acid (H2SO4) from acid mine water | |
| CN111825266A (en) | Catalytic cracking wet desulphurization waste water recycling system and method | |
| CN220867217U (en) | Lithium extraction and silicon removal system for salt lake | |
| CN111233221A (en) | Water purification method and system and water purifier with stable pure water output | |
| CN104909505A (en) | Treatment system applied to industrial desalination |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210316 |