CN113998831A - Water treatment method and device - Google Patents
Water treatment method and device Download PDFInfo
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- CN113998831A CN113998831A CN202111440186.9A CN202111440186A CN113998831A CN 113998831 A CN113998831 A CN 113998831A CN 202111440186 A CN202111440186 A CN 202111440186A CN 113998831 A CN113998831 A CN 113998831A
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- 238000000034 method Methods 0.000 title claims abstract description 30
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- 238000001728 nano-filtration Methods 0.000 claims description 16
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 12
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- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
-
- 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
- C02F1/048—Purification of waste water by 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention relates to a water treatment method and its apparatus, including the body, the body includes entering the water end body and discharging the water end body, there are water inlets and water outlets on it, set up multiple ducts between them, both ends of each duct are correspondent to and entered the water outlet of the water end body and water inlet of the discharging end body to conduct, and between adjacent duct outer wall, between duct outer wall and body are all connected sealingly, there are permanent magnets or electromagnets on the outer wall of each duct, and disclose and utilize the apparatus to carry on water treatment, carry on the filtration of the multi-media filter at first; then carrying out ultrafiltration treatment; then reverse osmosis treatment is carried out; recycling the pure water subjected to reverse osmosis treatment, and performing electrochemical treatment on the concentrated water; and finally, introducing the water flow after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment after passing through a magnetizing device. The device has simple structure, magnetizes water, inhibits scale, reduces energy consumption, and is more favorable for zero discharge of evaporative crystallization of water.
Description
The application is a divisional application of an invention patent with a parent case name of 'a magnetizing device for water treatment and application thereof'; the parent application has the application number: CN 202011344306.0; the application date of the parent application is as follows: 2020-11-26.
Technical Field
The invention relates to the technical field of water treatment, in particular to a water treatment method and a water treatment device.
Background
Industrial wastewater is a great problem in the development of industry nowadays, and water treatment is a process of separating pollutants in various forms from wastewater or decomposing and converting the pollutants into harmless and stable substances by using various technical measures, so that the wastewater is purified. Wastewater treatment methods can be classified into three major types, physical treatment, chemical treatment and biological treatment, depending on the principle of action of the technical measures and the removal object. The magnetization treatment is to change water into magnetized water after the water crosses a magnetic field with certain intensity, and the water is magnetized to generate the change of physicochemical properties. The existing magnetization treatment is characterized in that magnets are arranged outside a large pipeline due to the arrangement of the magnets and the arrangement of a water flow pipeline, so that the magnetization of water is not uniform enough, and because the magnetization treatment steps are unreasonable in the whole water treatment process, salt molecules which should be crystallized and removed in the previous period are not crystallized, so that impurities in salt formed by final evaporation crystallization are excessive, zero emission of water treatment cannot be realized, and energy consumption in the evaporation process is overhigh.
Disclosure of Invention
The invention aims to provide a water treatment method and a device thereof, which are used for solving the technical problems in the prior art, reasonably sequencing the water treatment processes and effectively removing impurities in water.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a water treatment method, which comprises the following steps:
s1, introducing water to be treated into the multi-media filter for filtering, and adjusting the pH of the effluent of the multi-media filter;
s2, introducing the water filtered by the multi-medium 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 reverse osmosis treatment, removing hardness of the concentrated water, introducing the water after hardness treatment into a nanofiltration device for nanofiltration treatment, introducing the water after nanofiltration treatment into a butterfly reverse osmosis device for secondary reverse osmosis treatment, recycling the pure water after secondary reverse osmosis treatment, and introducing the concentrated water after secondary reverse osmosis treatment into an electrochemical oxidation treatment unit;
s5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment after passing through a magnetizing device, wherein the flow velocity of the water after electrochemical treatment passing through the magnetizing device is 1.5-3 m/S;
preferably, the electrochemical oxidation treatment unit comprises an electrode shell which is connected and conducted with the reverse osmosis device and the magnetization device and used for installing electrodes, negative plates and positive plates which are arranged at intervals in a staggered mode are arranged in the electrode shell, a control circuit board which is electrically connected with a power supply is arranged on the electrode shell, and the control circuit board is electrically connected with the negative plates and the positive plates.
Preferably, the pH of the water is adjusted to 6.5-8 after the wastewater is filtered by the multimedia filter, before the water is passed to the ultrafiltration device.
Preferably, the method further comprises step S6, introducing the vapor evaporated by the evaporative crystallizer into a condensing device for cooling to generate condensed water, wherein the condensing device is connected with a collecting container for collecting the condensed water.
Preferably, the magnetizing device comprises a housing, the housing comprises a water inlet end housing and a water outlet end housing, the water inlet end housing and the water outlet end housing are both provided with a water inlet and a water outlet, a plurality of conduits are arranged between the water inlet end housing and the water outlet end housing, the conduits are arranged in a honeycomb structure, two ends of each conduit are correspondingly communicated with the water outlet of the water inlet end housing and the water inlet of the water outlet end housing, the outer walls of adjacent conduits and the outer walls of the conduits are hermetically connected with the housing, the outer wall of each conduit is provided with a permanent magnet or an electromagnet, the permanent magnets or the electromagnets are distributed in a hale shell array, magnetic lines of force generated by the permanent magnets or the electromagnets are perpendicular to the axis of the conduit, and the magnetic field intensity generated by each permanent magnet or the electromagnet GS is not less than 1000.
Preferably, the water inlet end shell and the water outlet end shell are integrally formed, and the conduit is arranged in the shell.
The invention also discloses a water treatment device adopted by the water treatment method, which comprises a multi-medium filter, an ultrafiltration device, a reverse osmosis device, a nanofiltration device, a disc type reverse osmosis device, an electrochemical oxidation treatment unit, a magnetization device and an evaporative crystallizer which are sequentially connected end to end.
Preferably, the multi-media filter, the ultrafiltration device, the reverse osmosis device, the nanofiltration device, the disc-type reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device and the evaporation crystallizer are connected through a water pipe, a control valve is arranged on a water pipe between two adjacent devices, and the multi-media filter, the ultrafiltration device, the reverse osmosis device, the nanofiltration device, the disc-type reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device, the evaporation crystallizer and the control valve are all electrically connected with the control host.
Compared with the prior art, the invention has the following technical effects:
the magnetizing device changes the traditional large pipeline into the combination of a plurality of small-caliber pipelines, and the magnet is arranged outside each pipeline, so that when water flows through the pipelines, the water at different positions far away from the magnet can be magnetized under the same magnetic field strength, the magnetization is more uniform, and the problem that the water magnetization is not uniform or the magnetic field strength needs to be enhanced due to the fact that the magnetic field strength is weaker at the position far away from the magnet in the large-caliber pipeline is solved. When the device is applied, the device is arranged before evaporative crystallization, the electrochemical oxidation treatment unit is arranged before magnetization, most of slightly soluble salt molecules in water are removed before entering the magnetization device, the rest salt molecules entering the magnetization device are magnetized, the affinity among the salt molecules disappears, the crystallization of large crystals is avoided, meanwhile, the number of single water molecules is increased due to magnetization, the water molecules occupy all gaps of a solution, small molecular water formed after the water is magnetized is easier to be evaporated into water vapor, the energy consumption during evaporative crystallization is reduced, the purity of crystals formed through evaporative crystallization is higher, the commercial requirement can be met, the waste is changed into valuable, and zero emission of water treatment is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a magnetizing apparatus according to an embodiment of the present invention;
FIG. 2 is a block flow diagram of an embodiment of the invention;
part names and serial numbers in the figure: 1-a shell; 10-water inlet end shell; 11-water outlet end shell; 12-a water inlet; 13-water outlet; 2-a catheter; 3-permanent magnets or electromagnets.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a water treatment method and a device thereof, which are used for solving the technical problems in the prior art, reasonably sequencing the water treatment processes and effectively removing impurities in water.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In the embodiment of the present invention, as shown in fig. 1, a magnetizer for water treatment includes a housing 1, the housing 1 includes a water inlet end housing 10 and a water outlet end housing 11, at this time, the water inlet end housing 10 and the water outlet end housing 11 may be two separate components or two ends of the same component combined together, the interiors of the two separate components or two ends of the same component are hollow as a part of a water flowing channel, a water inlet 12 and a water outlet 13 are respectively disposed on the water inlet end housing 10 and the water outlet end housing 11, that is, the water inlet end housing 10 is disposed with a water inlet 12 and a water outlet 13, the water outlet end housing 11 is also disposed with a water inlet 12 and a water outlet 13, a plurality of conduits 2 are disposed between the water inlet end housing 10 and the water outlet end housing 11, two ends of each conduit 2 are correspondingly communicated with the water outlet 13 of the water inlet end housing 10 and the water inlet 12 of the water outlet end housing 11, and the outer walls of the adjacent guide pipes 2 and the outer walls of the guide pipes 2 are hermetically connected with the shell 1, so that the water inlet end shell 10 and the water outlet end shell 11 are communicated through the guide pipes 2, as many guide pipes 2 are arranged, the corresponding number of water outlets 13 are arranged on the water inlet end shell 10, the corresponding number of water inlets 12 are arranged on the water outlet end shell 11, one guide pipe 2 is correspondingly connected and communicated with one water outlet 13 of the water inlet end shell 10 and one water inlet 12 of the water outlet end shell 11, so that a water flow channel through which water flows is formed, and the guide pipes 2 form a plurality of water flow channels, so that the traditional large pipeline is changed into a combination of a plurality of small-caliber pipelines, and magnets required for magnetization are arranged outside the pipeline. When the water inlet end shell 10 and the water outlet end shell 11 are separated into two parts, the two parts are respectively used as connecting parts for connecting the water source and the water outlet of the conduit 2, and can be arranged according to different requirements, such as increasing and decreasing conduits and the like, when the two parts are at the two ends of the same part, the water inlet end shell 10 and the water outlet end shell 11 are integrally formed, the conduit 2 is arranged in the shell 1, the conduit 2 and the shell 1 are integrated, the number of the conduits 2 arranged in the shell 1 is fixed and is not easy to change, but the conduits can be conveniently arranged in a corresponding manner as an integral device in the flow of wastewater treatment. Thus, the water inlet end shell 10 and the water outlet end shell 11 which are of an integral structure or a separate structure can be selected according to different use requirements, the plurality of guide pipes 2 are arranged in a honeycomb structure, the arrangement structure is compact, the flow velocity of water in each guide pipe 2 is uniform, the arrangement of the magnets outside the guide pipes is facilitated, magnetic fields generated among the magnets can be influenced and enhanced mutually through a certain arrangement rule, for example, the arrangement of a sea shell array, a permanent magnet or an electromagnet 3 is arranged on the outer wall of each guide pipe 2, and the magnets are arranged outside each pipe, so that when water flows through the pipes, the water at different positions far and near the magnets can be magnetized under the same magnetic field strength, the magnetization is more uniform, and the problem that the magnetic field strength at the position far away from the magnets in a large-caliber pipe is weaker is solved, resulting in problems of non-uniform magnetization of water or the need for increased magnetic field strength. For the arrangement of the magnets on the outer wall of the conduit 2, the magnetic lines of force generated by the permanent magnets or the electromagnets 3 are perpendicular to the axis of the conduit 2, so that the water is ensured to cut the magnetic lines of force perpendicularly when flowing through the conduit 2, the water can be ensured to be magnetized by the magnetic fields generated by the magnets, the magnets arranged on the outer wall of each conduit 2 can be arranged in a seashell display mode to enhance the strength of the magnetic fields, and the magnetic field strength generated by each permanent magnet or electromagnet 3 is not less than 1000GS, so that the water can be effectively magnetized when flowing through the conduit 2.
A water treatment method, as shown in fig. 2, comprising treating water with a magnetizing apparatus according to any one of the preceding claims, comprising the steps of:
s1, introducing the water to be treated into a multi-media filter for filtering, wherein the multi-media filter can be used for filtering impurities such as fine particles, suspended matters, colloid and the like in the water, the adopted filter material is 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, so that the SDI (serial digital interface) of the outlet water is less than or equal to 4, in practical application, the filtering of the multi-media filter can be adjusted through the steps of adjusting the flow rate of the water, carrying out backwashing, air scrubbing and forward washing of the multi-media filter for multiple times in turn according to the source of the waste water, so that the outlet water meets the requirements, simultaneously adjusting the pH value of the outlet water, adjusting the pH value of the water to 6.5-8 after the multi-media filter filters the waste water, then introducing the water into the ultrafiltration device, and keeping 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, introducing the water filtered by the multi-media filter into an ultrafiltration device for ultrafiltration treatment, wherein the ultrafiltration device is the same as a conventional ultrafiltration device, small molecules smaller than the pore diameter of a membrane plate are extruded out of the membrane plate under the action of pressure, and large molecules are intercepted on the membrane plate, while 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, and the problem of slow ultrafiltration speed (concentration polarization problem) is caused, which is not beneficial to the ultrafiltration, and 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, the membrane flux is 1-500L/(m 2. h), the hollow fiber capillary on the hollow fiber ultrafiltration membrane greatly increases the permeation surface area, and the ultrafiltration speed is effectively improved, the problem of concentration polarization is avoided, the problem that the normal operation of equipment is influenced by membrane filament breakage caused by overlarge pressure of a membrane shell and a membrane filament due to overlarge pressure bearing can be avoided by operating the pressure, and meanwhile, the ultrafiltration membrane with corresponding membrane flux is selected according to different water qualities of inlet water;
s3, the water after ultrafiltration treatment is led into a reverse osmosis device for reverse osmosis treatment to form available pure water which can permeate through a reverse osmosis membrane and concentrated water which can not permeate through the reverse osmosis membrane, thus after colloid, particles and substances with high relative molecular mass in the water are removed by ultrafiltration, some salt and other electrolytes still exist in the water, then the salt and other electrolytes can not pass through the reverse osmosis membrane along with the water by reverse osmosis treatment to further purify the water quality, at the moment, impurities are removed from the water outside the reverse osmosis membrane to obtain highly purified and available pure water which passes through the reverse osmosis membrane, and the concentrated water with high-concentration salt can be formed due to the permeation of the pure water in the reverse osmosis membrane, so that the part can not be directly used 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 is 1-2.5MPa, the reverse osmosis membrane has higher chemical and physical stability and durability and can bear strong chemical cleaning, and the characteristic of high-density hydrophilic groups enables the reverse osmosis membrane to have the performances 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 enter the electrochemical oxidation treatment unit together with the concentrated water without discharging waste water, zero discharge of waste water is achieved, a low-voltage electric field is formed in the water in the electrochemical oxidation treatment unit, a large amount of hydroxyl radical strong oxidation substances are generated in an anode region of the low-voltage electric field, the water can be decolorized, COD (chemical oxygen demand) in the water can be further reduced, impurities affecting water hardness, such as calcium ions and the like in the water can be adsorbed on a cathode in a cathode region, ions in the water can be repeatedly migrated by the formed low-voltage electric field, the viscosity of the water is reduced in the migration process, the purified water can enter an evaporation crystallizer more favorably, and the operating voltage of the electrochemical oxidation treatment unit is not more than 36V, the operation current is 25-100A, so that a large-current low-voltage environment is formed, the electrochemical oxidation treatment is performed on water 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 after passing through a magnetizer, wherein the flow velocity of the water after electrochemical treatment through the magnetizer is 1.5-3m/S, most of slightly soluble salt molecules in the water are removed before entering the magnetizer, the remaining salt molecules entering the magnetizer are magnetized, such as calcium salt, sodium salt and the like, in the magnetizer, the magnetization of the water is ensured by the magnetic field intensity and the flow velocity of the water, the affinity among the salt molecules in the water is lost, the crystallization of large crystals is avoided, the number of single water molecules is increased by magnetization, the water molecules occupy each gap of the solution, the formation of the crystals is further inhibited, the water can enter the evaporative crystallizer more conveniently, the purity of the crystals formed by evaporative crystallization is higher, the commercial requirement can be met, and the waste is changed into valuable, zero discharge of wastewater treatment is realized, so that the amount of miscellaneous salts entering the water of the evaporative crystallizer is small, the whiteness and purity of the salt formed after evaporative crystallization are improved due to decoloration and purification through electrochemical oxidation before evaporative crystallization, the commercial requirement can be met, and waste is changed into valuable; the micromolecule water formed after the water is magnetized is easier to be evaporated into water vapor, the energy consumption during evaporative crystallization is reduced, the treated water can be recycled, salt formed by crystallization can be used for commercial use, and zero discharge of wastewater treatment is really realized.
In a further improvement, as shown in fig. 2, 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 butterfly 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 an electrode shell which is connected and communicated with a reverse osmosis device and a magnetization device, namely, a water inlet of the electrode 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, a water outlet of the electrode shell is connected and communicated with a water inlet of the magnetization device, water treated by the electrochemical oxidation flows into the magnetization device through the water outlet, negative plates and positive plates which are arranged alternately are arranged in the electrode shell, corresponding negative and positive plates which are used as electrodes are arranged in the electrode shell, at the moment, in order to improve the treatment efficiency, the negative and positive plates are arranged alternately, namely, one positive plate is arranged between two adjacent negative plates, and one negative plate is arranged between two adjacent positive plates in the same way, the electrode shell is provided with a control circuit board electrically connected with a power supply, 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 electrode 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 a single chip microcomputer arranged on the control circuit board.
In a further improvement, as shown in fig. 2, the method further includes a step S6, in which the vapor evaporated from the evaporative crystallizer is introduced 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 as to recycle the condensed water and save resources.
The improvement is that the multi-medium filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device and the evaporation crystallizer are sequentially connected and communicated through water pipes and are all provided with control valves for controlling the on-off of the water pipes, the multi-medium filter, the ultrafiltration device, the reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device, the evaporation crystallizer and the corresponding control valves are all electrically connected with a control host, namely, the water outlet of the multi-medium filter is connected and communicated with the water inlet of the ultrafiltration device through a water pipe, the water outlet of the ultrafiltration device is connected and communicated with the water inlet of the reverse osmosis device through a water pipe, the water outlet of pure water of the reverse osmosis device is correspondingly connected into a collection device, the water outlet of concentrated water is connected and communicated with the water inlet of the electrochemical oxidation treatment unit through a water pipe, and the water outlet of the electrochemical oxidation treatment unit is connected and communicated with the water inlet of the magnetization device through a water pipe, the water outlet of the magnetizing device is communicated with the water inlet of the evaporative crystallizer through a water pipe, so that the 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, between the electrochemical oxidation processing unit and the magnetization device, and between the magnetization device 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 magnetization device, the evaporation crystallizer and the corresponding control valves are controlled by controlling the control valves, so that the processing flow can be more conveniently controlled, the control valves can be controlled on the control host to control the corresponding adjustment of each device, the operation is convenient, the efficiency is higher, and the correction can be timely carried out when problems are found, 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.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A method of water treatment comprising the steps of:
s1, introducing water to be treated into the multi-media filter for filtering, and adjusting the pH of the effluent of the multi-media filter;
s2, introducing the water filtered by the multi-medium 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 reverse osmosis treatment, removing hardness of the concentrated water, introducing the water after hardness treatment into a nanofiltration device for nanofiltration treatment, introducing the water after nanofiltration treatment into a butterfly reverse osmosis device for secondary reverse osmosis treatment, recycling the pure water after secondary reverse osmosis treatment, and introducing the concentrated water after secondary reverse osmosis treatment into an electrochemical oxidation treatment unit;
and S5, introducing the water after electrochemical treatment into an evaporative crystallizer for evaporative crystallization treatment after passing through a magnetizing device, wherein the flow velocity of the water after electrochemical treatment passing through the magnetizing device is 1.5-3 m/S.
2. The water treatment method according to claim 1, characterized in that: the electrochemical oxidation treatment unit comprises an electrode shell which is connected with the reverse osmosis device and the magnetization device and used for installing electrodes, negative plates and positive plates which are arranged in a staggered mode at intervals are arranged in the electrode shell, a control circuit board which is electrically connected with a power supply is arranged on the electrode shell, and the control circuit board is electrically connected with the negative plates and the positive plates.
3. The water treatment method according to claim 1, characterized in that: after the wastewater is filtered by the multi-medium filter, the pH value of the water is adjusted to 6.5-8, and then the water is introduced into an ultrafiltration device.
4. The water treatment method according to claim 1, characterized in that: and step S6, introducing the vapor evaporated by the evaporative crystallizer into a condensing device for cooling to generate condensed water, wherein the condensing device is connected with a collecting container for collecting the condensed water.
5. The water treatment method according to claim 1, characterized in that: the magnetizer comprises a shell, the shell comprises a water inlet end shell and a water outlet end shell, a water inlet and a water outlet are arranged on the water inlet end shell and the water outlet end shell, a plurality of guide pipes are arranged between the water inlet end shell and the water outlet end shell and are arranged in a honeycomb structure, two ends of each guide pipe are correspondingly communicated with the water outlet of the water inlet end shell and the water inlet of the water outlet end shell, the outer walls of the adjacent guide pipes and the outer walls of the guide pipes are hermetically connected, a permanent magnet or an electromagnet is arranged on the outer wall of each guide pipe and is distributed in a sea shell array, magnetic lines of force generated by the permanent magnets or the electromagnets are perpendicular to the axis of the guide pipes, and the magnetic field intensity generated by each permanent magnet or the electromagnet is not less than 1000 GS.
6. The water treatment method according to claim 5, characterized in that: the water inlet end shell and the water outlet end shell are integrally formed, and the guide pipe is arranged in the shell.
7. A water treatment apparatus used in accordance with the water treatment method according to any one of claims 1 to 6, characterized in that: comprises a multi-medium filter, an ultrafiltration device, a reverse osmosis device, a nanofiltration device, a disc reverse osmosis device, an electrochemical oxidation treatment unit, a magnetization device and an evaporation crystallizer which are connected end to end in sequence.
8. A water treatment apparatus used in the water treatment method according to claim 7, characterized in that: the multi-medium filter, the ultrafiltration device, the reverse osmosis device, the nanofiltration device, the disc type reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device and the evaporation crystallizer are connected through water pipes, a control valve is arranged on a water pipe between every two adjacent devices, and the multi-medium filter, the ultrafiltration device, the reverse osmosis device, the nanofiltration device, the disc type reverse osmosis device, the electrochemical oxidation treatment unit, the magnetization device, the evaporation crystallizer and the control valve are all electrically connected with the control host.
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