CN106277235B

CN106277235B - magnetic separation mechanism and metal ion separation method

Info

Publication number: CN106277235B
Application number: CN201610876687.4A
Authority: CN
Inventors: 朱光华
Original assignee: Jade Linghua Technology Co Ltd
Current assignee: Jade Linghua Technology Co Ltd
Priority date: 2016-10-07
Filing date: 2016-10-07
Publication date: 2019-12-06
Anticipated expiration: 2036-10-07
Also published as: CN106277235A

Abstract

The invention relates to a separation mechanism and an ion separation method, belongs to the technical field of environmental protection, and particularly relates to a magnetic separation mechanism and a metal ion separation method. The invention uses the function of high gradient strong magnetic field, uses paramagnetic metal wire to weave a chain net structure with special specification, and places the chain net structure in a special position of the high gradient magnetic field, can quickly capture magnetic substances into three-dimensional meshes, and returns the magnetic adsorption material for reuse through the blowing, vacuum suction and cyclone solid-gas separation system of air compression equipment.

Description

Magnetic separation mechanism and metal ion separation method

Technical Field

The invention relates to a separation mechanism and an ion separation method, belongs to the technical field of environmental protection, and particularly relates to a magnetic separation mechanism and a metal ion separation method.

Background

Heavy metals contained in the wastewater have great harm to the environment and human health and long duration. A large amount of untreated wastes are transferred to a soil system, and are collected and remained in the soil environment under the action of natural factors. The soil pollution is mainly heavy metal pollution, wherein cadmium, mercury, lead and arsenic pollution is the most prominent, heavy metal ions such As chromium (Cr), arsenic (As), cadmium (Cd), zinc (Zn), nickel (Ni) and the like contained in the wastewater have the characteristics of difficult degradation, irreversible property, high toxicity, easy biological enrichment and the like, and a trace amount of the heavy metal ions can generate a toxic effect and has great harm.

The traditional treatment method of the polluted water comprises the following steps: chemical precipitation, ion exchange, adsorption, membrane separation, oxidation-reduction, electrolysis, extraction and the like, but the methods are often greatly influenced by factors such as water temperature, pH value, water quality and the like, have low removal rate on some soluble substances and have secondary pollution. The existing technologies for treating and repairing soil organic matters and heavy metals comprise common technologies such as a physical and chemical method, a phytoremediation method, a microbial remediation method, a soil leaching backfill method and the like. At present, in the soil remediation engineering, the method which is more widely applied is to recycle the pollutants in the soil into the leaching water through leaching, backfill the treated soil, and then carry out water treatment on the leached polluted water.

The magnetic separation technology is applied to wastewater treatment, and particularly has unique advantages in treating heavy metal wastewater by the superconducting high-gradient magnetic separation technology. For weak magnetic and non-magnetic pollutants in the wastewater, the wastewater can be rapidly and magnetically separated and treated by adsorption methods of magnetic media with various characteristics. Due to the advantages of low cost, small space, high efficiency, high speed processing and the like of the magnetic separation processing system, the magnetic separation processing system becomes a new scientific research direction in recent years. The magnetic separation of heavy metal sewage is realized by two aspects of work, namely superconducting magnet and magnetic seed. Superconducting magnet equipment is a well-established technology and can be conveniently obtained from commercial products. The key problems of magnetic separation are how to prepare high-quality magnetic seeds and the specific process of magnetic separation.

the photocatalytic oxidation method is an advanced oxidation technology which is researched more at present, is an environment-friendly green water treatment technology, and can thoroughly oxidize and degrade organic pollutants in sewage. In combination with a certain amount of light radiation, the photosensitive dielectric material is excited under the irradiation of light to generate electrons (e-) and holes (h +). These electrons and holes have a strong reducing and oxidizing power and can react with water or stored oxygen to generate hydroxyl radicals (. OH) and super anions (. O). These extremely oxidizing radicals can almost completely break and decompose chemical bonds constituting organic molecules, and thus achieve harmless treatment. However, the existing photocatalytic oxidation method has low catalyst utilization rate and recovery rate, and needs to improve the catalyst efficiency, adopt the combination of photo-generated electrons and holes, and other processing technologies to improve the reaction efficiency and other problems.

The superconducting high-gradient magnetic separation technology has become one of the most promising novel sewage treatment technologies with unique separation principle and many advantages. With the continuous development of technical theory and equipment, the application fields of the adsorption material are increasing day by day, the adsorption material has unique advantages in the aspects of industrial wastewater, domestic sewage, polluted river water and lake water and treating weak magnetic and non-magnetic pollutants in sludge and wastewater, and the adsorption material utilizing the magnetic function has been subjected to numerous researches and small-scale application. The photocatalytic oxidation method also has extremely excellent characteristics. However, the two technologies have not yet been popularized and applied in large-scale engineering due to the lack of efficient, economical and reasonable technical equipment, and particularly, whether the magnetic separation method of the equipment and the functional magnetic adsorption material can be well matched or not is related to whether the characteristics of the magnetic separation technology can be fully exerted or not. The photocatalytic oxidation is one of the important subjects in the field at present, that is, the photocatalytic reaction medium can only generate catalytic action under the irradiation of a light source with a specific wavelength, and whether the photocatalytic reaction medium can generate catalytic reaction under the action of a wider spectrum can be developed.

In order to solve the problems, the inventor proposes that a chain net structure which is woven by paramagnetic metal wires and has a specific specification is placed in a specific position of a high-gradient magnetic field by using the action of the high-gradient strong magnetic field, so that magnetic substances can be quickly captured into three-dimensional meshes, and a magnetic adsorption material is returned for reuse through a blowing, vacuum suction and cyclone solid-gas separation system of air compression equipment. The invention utilizes the quantum carbon magnetic medium as the magnetic adsorption material, thereby improving the adsorption efficiency of ions in the sewage.

disclosure of Invention

the invention mainly aims to solve the technical problem of low efficiency of sewage metal pollution treatment in the prior art, and provides a magnetic separation mechanism and a metal ion separation method. The mechanism and the method utilize a quantum carbon magnetic medium as a magnetic adsorption material, can quickly adsorb various metal ions in liquid, are adsorbed into a three-dimensional paramagnetic metal chain net under the action of a strong magnetic field, and carry out and recover the quantum carbon magnetic medium through mechanical transmission of the metal chain net.

The technical problem of the invention is mainly solved by the following technical scheme:

A magnetic separation mechanism comprising: the magnetic separation tank body is positioned in the magnetic field region, a metal chain net hinged on the driving wheel is arranged in the magnetic separation tank body, and the metal chain net can rotate around the driving wheel so as to move from the liquid side to the air flow range of the air blowing horn mouth of the magnetic medium extraction mechanism.

Preferably, in the magnetic separation mechanism, at least a part of the metal chain mesh is located between two oppositely arranged air-blowing bellmouths, one of the air-blowing bellmouths is positive pressure, and the other air-blowing bellmouth is negative pressure.

preferably, in the magnetic separation mechanism, the metal chain mesh is a metal mesh with a three-dimensional space, which is made of paramagnetic metal.

preferably, in the magnetic separation mechanism, the metal chain net includes: the end parts of the adjacent transverse shafts are connected through chain rings, and the transverse shafts are provided with chain net surfaces which are formed by winding chain wires in a wavy mode.

Preferably, in the magnetic separation mechanism, one end of the metal chain net is hinged with the driven wheel, and the other end of the metal chain net is hinged with the driving wheel; the middle part of the magnetic separation tank body is provided with a plurality of tension wheels connected with the metal chain net.

Preferably, in the magnetic separation mechanism, the device for providing the magnetic field region includes a superconducting magnet, and the superconducting magnet specifically includes: the superconducting body is internally provided with a vacuum exhaust port, a current terminal, a refrigerant inlet and a refrigerant outlet.

Preferably, in the magnetic separation mechanism, the superconducting magnet is a low-temperature superconducting magnet, the refrigerant is liquid helium, the current terminal supplies current to the superconducting body at 114A, the temperature monitoring control is 4K, the vacuum exhaust is 10-6hPa, and the magnetic field center is 2T.

optimized, foretell magnetic separation mechanism, be provided with inlet, overflow mouth on the magnetic separation jar body, inlet and overflow mouth are located respectively the both sides of metal chain net, and, one side that sets up the inlet on the magnetic separation jar body is provided with hierarchical inside indentation's structure, and the outer wall at every level is parallel to each other, is provided with the reducing section of slope between every level.

A metal ion separation method, comprising: adding quantum carbon magnetic media into the sewage, mixing, and separating the quantum carbon magnetic media adsorbed with metal ions from the sewage by utilizing a strong magnetic field; wherein the quantum carbon magnetic medium is a quantum carbon mixture with superparamagnetic property.

preferably, in the above metal ion separation method, the quantum carbon magnetic medium adsorbing the metal ions is adsorbed on the rotatable metal chain net and carried out by using a magnetic field, and the quantum carbon magnetic medium on the metal chain net is adsorbed and separated by using an air-blowing bell mouth and recovered.

Therefore, the invention has the following advantages: 1. the quantum carbon magnetic medium provided by the invention can specially and effectively separate and adsorb heavy metal ions in water, and the treatment efficiency of the metal ions is improved;

2. The paramagnetic metal chain net is magnetized in a high-gradient magnetic field to adsorb the quantum carbon magnetic medium in water, and the adsorbed quantum carbon magnetic medium is lifted to an air compression mechanism through the metal paramagnetic chain net for separation and recovery, so that the cost of magnetic separation is reduced.

drawings

FIG. 1 is a schematic view of a sewage treatment process;

FIG. 2-1 is a schematic view of a heavy metal treatment portion of the sewage treatment plant system;

FIG. 2-2 is a schematic view of an organic matter treatment portion of the sewage treatment plant system;

FIG. 3 is a schematic diagram of a magnetic separation system;

FIG. 4-1 is a front view of the superconducting magnet profile;

FIG. 4-2 is a top view of the superconducting magnet profile;

FIG. 5 is a magnetic seed recovery and reuse system;

FIG. 6-1 is a front view of a three-dimensional paramagnetic metal chain network;

FIG. 6-2 is a side view of a three-dimensional paramagnetic metal chain mesh;

FIG. 7 is a schematic view of an air blow flare of the magnetic media extraction mechanism;

FIG. 8-1 is a detailed view of the air-blowing horn of the magnetic medium extraction mechanism;

FIG. 8-2 is a bottom view of FIG. 8-1;

FIG. 8-3 is a left side view of FIG. 8-1;

FIG. 9 is a schematic view of the structure of the dissolved oxygen microbubble generator;

FIG. 10-1 is a schematic view of the structure of a metal plate A1 of the dissolved oxygen microbubble generator;

FIG. 10-2 is a side schematic view of FIG. 10-1;

FIG. 10-3 is a schematic structural view of a metal sheet B1 of the dissolved oxygen microbubble generator;

FIG. 10-4 is a side schematic view of FIG. 10-3;

FIG. 10-5 is a schematic structural view of a metal sheet A2 of the oxygen-dissolved microbubble generator;

FIG. 10-6 is a side schematic view of FIG. 10-5;

Fig. 10-7 are schematic structural views of a metal sheet B2 of the dissolved oxygen microbubble generator;

FIG. 10-8 is a side schematic view of FIG. 10-7;

FIGS. 10 to 9 are schematic structural views of a metal sheet C of the dissolved oxygen microbubble generator;

FIGS. 10-10 are side schematic views of FIGS. 10-9;

FIGS. 10 to 11 are schematic structural views of a metal plate D of the dissolved oxygen microbubble generator;

FIGS. 10-12 are side schematic views of FIGS. 10-11;

FIGS. 10-13 are schematic views showing the structure of the oxygen-dissolved microbubble generator in which the metal sheets A1 and B1 are stacked;

FIGS. 10-14 are schematic views of the stacked structure of the metal sheets A2 and B2 of the oxygen-dissolved microbubble generator;

FIGS. 10-15 are schematic views showing the structure of the superposition of the metal sheets A and B of the dissolved oxygen microbubble generator;

FIG. 11 is a schematic view of the structure of the oxygen-dissolved microbubble generator after the metal sheets are combined;

FIG. 12 is a schematic of microbubble size versus density;

FIG. 13 is a microbubble ion morphology;

FIG. 14 is a schematic diagram of a photoreactor configuration;

FIG. 15 is a schematic view of a metal fiber sintered felt filter construction;

FIG. 16 shows the statistical data of the treatment effect of wastewater from electroplating organic ink plant and the medium circulation;

FIG. 17-1 is a schematic view of the effect of wastewater treatment in a printed circuit board plant 1.

FIG. 17-2 is a schematic view of the effect of wastewater treatment in a printed circuit board plant 2.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

in the figure, a sewage collecting tank 1, a refrigerator control cabinet 2, a mixing tank 3, a stirring system 4, a system control cabinet 5, a superconductor 6, a refrigerator 6-1, a magnetic field area 6-2, a magnetic field center 6-3, a superconductor body 6-4, a current terminal 6-5, a refrigerant inlet 6-6, a refrigerant outlet 6-7, a vacuum exhaust port 6-8, a temperature monitoring 6-9, a magnetic separation tank 7, an overflow port 7-1, a magnetic medium extracting mechanism 8, a driving wheel 8-1, a driven wheel 8-2, a tension wheel 8-3, an air suction port 8-4, an air blowing port 8-5, a three-dimensional paramagnetic metal chain net 8-6, an air passage 8-7, a fixing plate 8-8, a bell mouth 8-9, a magnetic medium collecting system 9, a first cyclone solid-gas separator 9-1, a first cyclone solid-gas separator 9, 9-2 parts of a second cyclone solid-gas separator, 9-3 parts of an air pipe, 10 parts of a quantum carbon photoreaction medium mixing tank, 10-1 parts of a quantum carbon photoreaction medium feeding port, 11 parts of an oxygen-dissolved micro bubble generator, 11-1 parts of a positioning bolt, 11-2 parts of an oxygen-dissolved micro bubble generator shell, 12 parts of a photoreactor, 12-1 parts of a light source end cover, 12-2 parts of an outlet, 12-3 parts of a metal outer cylinder, 12-4 parts of a light reflecting layer, 12-5 parts of a light source, 12-6 parts of an inlet, 13 parts of a primary sedimentation tank, 14 parts of a secondary sedimentation tank, 15 parts of a water purifying filter, 15-1 parts of a purified water outlet, 15-2 parts of a water purifying device shell, 15-3 parts of a filter, a water inlet pump P1, a sewage pump P2, an air pressure pump P3, a photoreaction pressure pump P4, a recovery pump P5, a drainage pump P6, A photoreaction inlet valve F5, a photoreaction outlet valve F6, a quantum carbon photoreaction medium recovery valve F7, a secondary quantum carbon photoreaction medium recovery valve F8, a back flushing cleaning valve F9, a back flushing stop valve F10, a secondary return valve F11, a discharge valve F12, a secondary sampling valve F13, a pressure back flushing meter V1, a negative pressure meter V2, a pressure sensor F3626,

Sewage treatment process and system structure

Fig. 1 shows a sewage treatment process according to this embodiment, in which a sewage purification system includes a sewage collection tank, a mixing tank, a superconducting magnetic separation system, a photocatalytic reaction device, a magnetic medium circulation device for recycling superconducting magnetic media, and a quantum carbon photoreaction medium circulation device, which are sequentially connected.

the sewage purification system of the embodiment is a system formed by combining heavy metal treatment and organic matter treatment, and is a method for respectively treating heavy metals and organic pollutants in sewage. Particularly, in the two combined treatment methods, the magnetic adsorption medium and the quantum carbon photoreaction medium provided by the invention are matched with a sewage purification system to specially and effectively separate and decompose heavy metals and organic pollutants in water.

the superconducting magnet separation mechanism comprises a superconducting magnet, the superconducting magnet can be disassembled and replaced by a low-temperature superconducting magnet or a high-temperature superconducting magnet, and the superconducting magnet provides a preset high-gradient magnetic field for the inside of the superconducting separation device. A metal paramagnetic chain net extraction mechanism is arranged in the magnetic field, and the paramagnetic chain net is magnetized in a high-gradient magnetic field to adsorb magnetic substances in water. The attracted magnetic substance is lifted to an air pressure mechanism through a metal paramagnetic chain net for separation, so that the effect of magnetic separation is achieved. The magnetic substance is the quantum carbon magnetic medium provided by the invention.

the sewage purification system of the invention uses a photoreaction treatment mechanism which comprises 1 or more groups of photoreactors, and quantum carbon photoreaction media participate in the reaction of the photoreactors according to specific size and specific gravity. Solid-liquid separation is carried out by a natural precipitation method, and the quantum carbon photoreaction medium is recycled by a circulating system. The quantum carbon photoreaction medium is prepared by the method. After the water is treated by magnetic separation and photoreaction, the water is filtered by a high-precision metal fiber sintered felt filter body to obtain the clean water reaching the standard.

Fig. 2-1 and 2-2 are schematic diagrams of alternative specific implementation systems of the sewage treatment system in the embodiment. Wherein port A1 in FIG. 2-1 is connected with port A2 in FIG. 2-2.

Wherein, the heavy metal treatment part is shown as figure 2-1, and specifically comprises: the bottom of the sewage collecting tank 1 is connected with the mixing tank 3 through a sewage pump P2; the mixing tank 3 is provided with a stirring device 4 for stirring the interior of the tank body, and the bottom of the mixing tank 3 is connected with the magnetic separation tank body 7 through a water inlet pump P1; a magnetic medium extraction mechanism 8 is arranged on the magnetic separation tank body 7, and the magnetic medium extraction mechanism 8 is connected with a magnetic medium collection system 9; the recovery port of the magnetic medium collection system 9 is communicated with the mixing tank 3; the magnetic medium collecting system 9 comprises two oppositely arranged air blowing horn mouths which are connected with an air pressure pump P3, two air nozzles are oppositely arranged at two sides of the three-dimensional paramagnetic metal chain net 8-6, one air nozzle is used for generating positive pressure, and the other air nozzle generates negative pressure; thereby lifting the magnetic medium from the three-dimensional paramagnetic metal chain net 8-6. The magnetic separation tank 7 is located in the magnetic field range of the superconductor 6, and the superconductor 6 is connected with the refrigerator 2 and the system control cabinet 5.

fig. 2-2 is an organic matter treatment section specifically including: a quantum carbon photoreaction medium mixing tank 10 connected with an overflow port above the magnetic separation tank 7, wherein the bottom of the quantum carbon photoreaction medium mixing tank 10 is connected with an oxygen-dissolved microbubble generator 11 through a photoreaction pressure pump P4; the dissolved oxygen microbubble generator 11 is connected with the photoreactor 12, the primary sedimentation tank 13, the secondary sedimentation tank 14 and the water purification filter 15 in sequence.

Wherein, the bottoms of the first-stage sedimentation tank 13 and the second-stage sedimentation tank 14 are connected with the quantum carbon photoreaction medium mixing tank 10 through a recovery pump P5 and a recovery valve F4.

in this embodiment, a sampling detection port is provided on the pipe connected to the overflow port above the magnetic separation tank 7. The pipeline is connected with the sewage collecting tank 1 through a primary return valve F1, is connected with a sampling detection port through a primary sampling valve F2, is connected with the quantum carbon photoreaction medium mixing tank 10 through a water inlet valve F3,

the sewage treatment flow of the present example will be specifically described below. In this embodiment, the ion treatment step and the organic matter decomposition step are respectively performed for heavy metal treatment and organic matter treatment, which are described below.

The ion treatment step specifically comprises the following substeps:

Step 1, after sewage enters a sewage collecting tank 1, the sewage quantitatively enters a mixing tank 3 through a sewage pump P2, a magnetic medium feeding port is formed above the mixing tank 3, quantum carbon magnetic media are quantitatively provided through the feeding port below a first cyclone solid-gas separator 9-1 according to the concentration requirement, and the quantum carbon magnetic media are fully mixed under the stirring of a stirring system 4.

and 2, directly conveying the uniformly mixed liquid to the magnetic separation tank 7 through a pipeline by using a water inlet pump P1.

And 3, connecting the magnetic separation tank 7 with a superconducting magnet 6, wherein the superconducting magnet 6 provides a magnetic field with the strength of 0.5T-5T to the inside of the magnetic separation tank 7. The magnetic separation tank body 7 is designed into a flow guide panel according to the fluid property and the magnetic field property of the mixed liquid from the inlet, the flow guide panel can be a 45-degree flat plate arranged below the mixed liquid inlet, the lower half section of a metal chain net in the magnetic medium extraction mechanism 8 is arranged in the liquid in the magnetic separation tank body 7, the mixed liquid firstly passes through the metal chain net in the magnetic medium extraction mechanism 8 through the flow direction of the flow guide panel, and the magnetic substances of the mixed liquid are all adsorbed onto the three-dimensional paramagnetic metal chain net shown in the figure 6-1 under the adsorption of a strong magnetic field and are conveyed to a magnetic medium recycling system for recycling. Non-magnetic large-particle substances in the mixed liquid are precipitated to the lower part of the 7 magnetic separation tank body, precipitates (sludge) are periodically removed, and the cleaned objects after the magnetic separation of the mixed liquid are continuously overflowed and discharged through an overflow port above the magnetic separation tank. The superconductor is connected with the refrigeration control cabinet 2. And maintaining control of the strong magnetic field. The system control cabinet 5 controls the system.

In this embodiment, the organic substance decomposition step specifically includes the following substeps:

Step 1, the water after magnetic separation flows out through an overflow port of a magnetic separation tank body 7, various indexes of heavy metals are sampled and detected at a sampling detection port 1 through a valve F2, and the water body which does not reach the standard returns to a sewage collection tank 1 again through a valve F1 for retreatment. After sampling detection reaches the standard, the valves F1 and F2 are closed, and F3 is opened to enter the photoreaction system.

Step 2, a water body enters a quantum carbon photoreaction medium mixing tank 10 through a valve F3, a quantum carbon photoreaction medium feeding port is arranged above the quantum carbon photoreaction medium mixing tank 10, quantum carbon photoreaction medium is quantitatively fed into the quantum carbon photoreaction medium feeding port according to the concentration requirement, after the quantum carbon photoreaction medium is fully mixed in the mixing tank, a mixed solution is given a certain power pressure through a pump P4, and after full dissolved oxygen reaction is carried out through an dissolved oxygen microbubble generator 11, the mixed solution enters a photoreactor 12 through a valve F5, the photoreactor 12 is composed of at least one or more groups, and the mixed solution after the photoreactor reaction enters a primary sedimentation tank 13 through a valve F6.

And 3, carrying out precipitation type solid-liquid separation in the primary sedimentation tank 13, precipitating the quantum carbon photoreaction medium to the bottom of the primary sedimentation tank 13, overflowing the separated water to the secondary sedimentation tank 14, enabling the precipitated quantum carbon photoreaction medium to be in a liquid slurry state at the bottom, and returning the quantum carbon photoreaction medium slurry to the quantum carbon photoreaction medium mixing tank 10 again through a valve F7, a pump P5 and a valve F4 for mixing and recycling.

and 4, continuing to precipitate and separate the residual quantum carbon photoreaction medium in the water by the secondary mixing tank, and returning the quantum carbon photoreaction medium slurry at the bottom to the quantum carbon photoreaction medium mixing tank 10 again through a valve F8, a pump P5 and a valve F4 for mixing and recycling. The supernatant of the second-stage mixing tank is subjected to sampling detection at a sampling detection port 2 through a water purifying filter 15, a valve F10, a pressure gauge V1 and a pump P6 to obtain clean water, the water is subjected to sampling detection at a sampling detection port 2 through a valve F13, the water reaching the standard is directly discharged through a valve F13, and the water which does not reach the standard is returned to the quantum carbon photoreaction medium mixing tank 10 again through a valve F11, a pump P5 and a valve F4 to be reprocessed.

Two, magnetic separation and magnetic medium recovery

as shown in fig. 3, the magnetic separation system is composed of a superconducting magnet 6, a magnetic separation tank 7, a magnetic medium extraction mechanism 8, and an adsorption mechanism, where the superconducting magnet 6 may be a high-temperature superconducting magnet or a low-temperature superconducting magnet.

the magnetic separation tank body 7 comprises a magnetic separation tank body, a liquid inlet, an overflow port and a sludge discharge port are arranged on the magnetic separation tank body, wherein the overflow port is preferably arranged at the top of the magnetic separation tank body.

The liquid inlet and the overflow port 7-1 are respectively positioned at two sides of the metal chain net, one side of the magnetic separation tank body 7, which is provided with the liquid inlet, is provided with a graded inward-retracting structure, the outer walls of each grade are parallel to each other, and a reducer section inclined by 45 degrees is arranged between each grade.

And the liquid to be treated enters the magnetic separation tank body from the liquid inlet and is treated, the treated liquid bottom is discharged from the overflow port, and the precipitated impurities in the liquid are discharged from the sludge discharge port at the bottom. A metal chain net is arranged in the magnetic separation tank body, one end of the metal chain net is hinged with a driven wheel in the magnetic separation tank body, the other end of the metal chain net extends to be hinged with the magnetic medium extraction mechanism and the roller in the magnetic separation tank body 8, and the middle part of the magnetic separation tank body is provided with a plurality of tension wheels connected with the metal chain net.

in the magnetic separation tank located in the magnetic field region provided by the superconducting magnet 6, the superconducting magnet has the appearance shown in fig. 4-1 and 4-2. The method specifically comprises the following steps: the superconducting body is internally provided with a vacuum exhaust port, a current terminal, a refrigerant inlet and a refrigerant outlet. The external dimension of the superconducting magnet is designed according to the requirement of a magnetic separation system, and the superconducting magnet can be a high-temperature superconducting magnet or a low-temperature superconducting magnet. The central magnetic field intensity is 2T-5T, and the refrigerant of the refrigerator is liquid helium or liquid nitrogen. For example, a low-temperature superconducting magnet is selected, a coolant is liquid helium, a current terminal supplies current 114A to the superconducting body, the temperature monitoring control is 4K, the vacuum exhaust is 10-6hPa, the magnetic field center is 2T, and a high-gradient magnetic field is provided for the magnetic separation system.

The magnetic medium extracting mechanism 8 and the magnetic medium circulating device are shown in fig. 5. A driving wheel is arranged in the magnetic medium extraction mechanism 8, and one end of the metal chain net is hinged on the driving wheel. The magnetic medium extraction mechanism 8 is provided with two oppositely arranged air-blowing horn mouths, the metal chain net is positioned between the two air-blowing horn mouths, one air-blowing horn mouth is connected with the positive pressure end of the air pump P3, and the other end of the air-blowing horn mouth is sequentially connected with a plurality of solid-gas separators and is communicated with the load pressure of the air pump P3. In this embodiment, two cyclone solid-gas separators are preferably connected.

after the structure is adopted, the air blowing horn mouth and the air pump P3 provide circulating air pressure power, positive pressure air is sent to the air blowing horn mouth through the air pipe to carry out air blowing separation on magnetic substances adsorbed on the three-dimensional paramagnetic metal chain net, meanwhile, a pipeline at the other end of the air pump P3 generates negative pressure, and negative pressure absorption is carried out on the magnetic substances on the three-dimensional paramagnetic metal chain net.

The cyclone solid-gas separator performs solid-gas separation twice to achieve the purpose of recovering magnetic substances. The quantum carbon magnetic medium collected by the cyclone solid-gas separator can quantitatively provide the magnetic medium for the mixing tank 3 according to the system requirement. For example, the air pump P is preferably an air pump with an air volume of 8.0m3/min, a static pressure of 16KPa and a power of 88KW, but not limited to this example, the static pressure generated by the air pipe can be in the range of 10KPa to 30 KPa.

The wire link net in this embodiment is shown in fig. 6-1 and 6-2. The metal chain net is a metal net with a three-dimensional space, namely a three-dimensional paramagnetic metal chain net, prepared from paramagnetic metal. It includes: the end parts of the adjacent transverse shafts are connected through chain rings, and the transverse shafts are provided with chain net surfaces which are formed by winding chain wires in a wave shape in a three-dimensional space. When the magnetic medium extraction device is used, the metal net in the three-dimensional space is magnetized in a high-gradient magnetic field, magnetic substances in the mixed liquid are adsorbed into the three-dimensional space of the metal chain net, and the movement of the chain net carries the magnetic substances together to be transported to the magnetic medium extraction mechanism 8. In principle, all paramagnetic metals can be used, and the three-dimensional geometric space of the metal chain network can also have various structural forms. By way of example, preferably, the paramagnetic material is SUS316, the three-dimensional space net is a spiral pipe wound by SUS316 steel wires, the diameter of the spiral pipe is 15mm, the pitch of the spiral pipe is 6mm, and the pipes are connected by the steel wires.

The air blowing horn of this embodiment is shown in fig. 7. The three-dimensional paramagnetic metal chain net is composed of a pair of horn air blowing openings and air suction openings which are identical in geometric dimension and opposite to each other, a three-dimensional paramagnetic metal chain net with corresponding width is arranged in the middle of each air blowing opening, the static pressure of each air blowing opening is equal to that of each air suction opening, the air blowing openings are positive pressure, and the air suction openings are negative pressure, so that the functions of absorbing and separating magnetic substances on the three-dimensional paramagnetic metal chain net are achieved. The geometric dimension and the orientation among the air blowing port, the three-dimensional paramagnetic metal chain net and the air suction port can be properly and randomly adjusted. By way of example, the distance between the air blowing opening and the air suction opening is 30mm, and the three-dimensional paramagnetic metal chain net is arranged in the middle.

Fig. 8-1 to 8-3 are detailed views of the bell mouth of the present embodiment. The method mainly comprises the following steps: trachea, horn mouth, fixed plate. The blowing and suction bellmouths have the same geometric dimension and can be adjusted properly. By way of example, the invention has found that the optimum choice is a blowing and suction bell with a static air pressure of 16KPa, a geometry of 7mm 600mm and SUS 304.

thirdly, organic matter decomposition and quantum carbon photoreaction medium recovery

The organic matter decomposing part mainly comprises a quantum carbon photoreaction medium mixing tank, an oxygen-dissolved microbubble generator, a photoreactor and the like. The quantum carbon photoreaction medium mixing tank is mainly used for mixing sewage and the quantum carbon photoreaction medium. The main components are described below.

1. Dissolved oxygen microbubble generator

The liquid after magnetic separation flows out from an overflow port of the magnetic separation tank body 7, enters the quantum carbon photoreaction medium mixing tank 10, and then enters the dissolved oxygen microbubble generator 11 through the photoreaction pressure pump P4.

the oxygen-dissolved microbubble generator 11 is divided into two parts, a microbubble cavity and a multi-diameter cavity, as shown in fig. 9.

Wherein, be provided with a plurality of dissolved oxygen reaction units in the microbubble chamber, every dissolved oxygen reaction unit includes polylith through-hole sheetmetal.

The shape of the metal sheet is shown in fig. 10-1 to 10-15. In the figure, the A1 sheet and the B1 sheet are through hole metal sheets which are hexagonally and uniformly arranged, the sizes of the hexagonally through holes are the same, the arrangement on the A1 sheet and the B1 sheet is different, when the A1 sheet and the B1 sheet are superposed, the circle center of each hexagonally through hole on the A1 sheet is the nearest outer intersection point of three adjacent hexagonally through holes on the B1 sheet, and in the figure, the A1-B1 are schematic diagrams after superposition.

the A2 pieces and the B2 pieces are through hole metal pieces which are uniformly arranged in a circular shape, the sizes of the circular through holes are the same, the arrangement on the A2 pieces and the arrangement on the B2 pieces are different, when the A2 pieces and the B2 pieces are superposed, the circle center of each circular through hole on the A2 piece is the nearest outer intersection point of three adjacent circular through holes on the B2 piece, namely the circle center of each circular hole on the A2 is the same as the circle center distance of three adjacent circular holes on the B2 piece, and the A2-B2 is a schematic diagram after superposition.

the C piece is a metal plate with a plurality of arc-shaped through holes in the excircle part, and five limiting bolt holes are formed in the middle of the metal plate.

The D piece is a metal plate with a through hole in the middle. When the sheets A1 and D were superposed, the hexagonal through-hole in the sheet A1 formed a micro-reactor space. The same effect is achieved by the A2 tablets, the B1 tablets and the B2 tablets. Fig. 11 is a schematic diagram of a dissolved oxygen microbubble generator, which is a structure formed by combining an a piece, a B piece, a C piece and a D piece, and forms a micro reaction kettle after combination, each micro reaction kettle is communicated with an adjacent reaction kettle, and a plurality of micro reaction kettles in which liquid media continuously flow and participate in reaction under different states of space, pressure, temperature, jet flow and the like are formed.

In fig. 9, the oxygen-dissolved microbubble generator is composed of one unit or a plurality of units, and the liquid medium enters the multi-diameter cavity after passing through the microbubble cavity. And a cavity A, a cavity B, a cavity C, a cavity D and a cavity E are arranged in the multipath cavity. The diameters of the cavities are different and have sudden changes, the liquid medium participates in the reaction under the environments with different flow rates and different positive and negative pressures, and the dissolved oxygen in the liquid medium generates a large amount of ionized particles under the conditions of intense stretching and compression.

for example, 3-5 groups of unit reactors are preferred for the unit reaction device at the front end of the dissolved oxygen microbubble generator. The proportional sizes of the pipe diameters of the rear end cavity A, the rear end cavity B, the rear end cavity C, the rear end cavity D and the rear end cavity E are selected arbitrarily, wherein the cavity D is a conical cavity, the conicity is 1:1, the pipe diameter is an outlet diameter, the cavity E is an open type cavity, the inlet diameter of the cavity E is equal to the outlet diameter of the cavity D, and the pipe diameter of the cavity E is larger than or equal to the pipe diameter of the cavity D. The preferred ratio of tube diameters for each lumen is 3:1.5:4:1: 1. The inlet end of the dissolved oxygen microbubble generator is provided with 3-5kg/cm2 by a pump P4.

When the liquid of the quantum carbon photoreaction medium and the treated water passes through the oxygen-dissolved micro bubble generator in the structure of fig. 9, a multiple micro reaction kettle at the front end of the generator generates a large amount of oxygen-dissolved micro bubbles in the liquid, and experimental detection shows that a frequency graph of the size and the density of the micro bubbles in fig. 12 is obtained, wherein the magnitude of the vertical axis in the graph is 106, and the result shows that the maximum frequency diameter is 100nm, the frequency peak diameter is about 20nm (50% of the particle number), about 12 hundred million particles/cm 3, and the minimum frequency diameter is about 25 nm. After a large number of oxygen-dissolved microbubbles react at the rear end of the generator, the medium surface of the liquid and the surfaces of the oxygen-dissolved microbubbles generate the form of microbubble ions, and fig. 13 is a schematic diagram showing the ion electric field state by establishing a model for the form of the microbubble ions.

2. Photoreactor principle and structure

FIG. 14 is a structural view of a photoreactor of the invention. The lamp tube consists of a metal outer tube, a reflecting layer, a lamp tube, a light source end cover, an inlet and an outlet. The lamp tube is arranged in the metal outer cylinder, a reflecting layer is arranged between the lamp tube and the outer cylinder, the lower end of the metal outer cylinder is provided with a liquid inlet, and the upper end of the metal outer cylinder is provided with an outlet.

The liquid passing through the dissolved oxygen microbubble generator carries a large amount of dissolved oxygen ions and is attached to the surface layer of the quantum carbon photoreaction medium and enters the photoreactor through the inlet of the photoreactor to react, the synergistic relationship of ultraviolet light, the quantum carbon photoreaction medium, the dissolved oxygen microbubbles and water is formed, the photocatalytic reaction efficiency is greatly improved, and the rate of generating strong oxidants such as hydroxyl radicals and the like through decomposition of the quantum carbon photoreaction medium and the removal rate of promoting the oxidation of organic matters are greatly improved. The quantum carbon photoreaction medium has various photoreaction substances, mainly including TiO2, ZnO, CdS, WO3, SnO2 and the like. Under the irradiation of light source with wavelength of 200-400 nm, the photoreactive matter produces great amount of strong active oxidant, such as OH-, O2, H, etc. to oxidize and decompose organic matter and inorganic matter completely and to produce harmless matter H2O, CO2, etc. The present invention exemplifies that the photoreactors are at least one group, preferably 4 groups, in the system of the present invention. The medium is granular quantum carbon photoreaction medium prepared by the invention, the grain diameter is 10um-100um, preferably 30um-60um, and the adding amount of the treated water is 0.1-1.2% (mass ratio), preferably 0.5-1% (mass ratio). The light source is preferably a 6-8w UV lamp having a dominant wavelength of 315nm to 400nm and an intensity of 1mW/cm 2. SUS316 is preferably selected for the tank body, a reflecting layer is arranged on the inner side of the tank body, the reflecting layer can be made of materials with a reflecting function, and a reflecting product of an acrylic mercury plating process is preferably selected and attached to the inner side of the tank body. The mixed liquid is output from the outlet at a flow rate of 30L/min.

3. principle and structure of water purifying filter

The liquid after the photoreaction enters a primary sedimentation tank 13 and a secondary sedimentation tank 14. A water purifying filter 15 is arranged in the secondary sedimentation tank 14. The structure of the water purifying filter 15 is shown in fig. 15. The method comprises the following steps: the shell is provided with a filter hole, a filter body is arranged on the filter hole, and a purified water outlet is formed in the shell. And purifying the clear water subjected to twice sedimentation by using a water purification filter. In the case of the invention, the preferable metal shell is SUS316, various specific high-precision filter screens can be used as the filter screens, the preferable metal fiber sintered felt filter body has the filtering precision of 3-10um, and the water quality passing through the water purifying filter can reach the standard requirement.

preparation and activation method of magnetic medium

the method for preparing the quantum carbon magnetic medium solution and the activation method used in the magnetic separation in this example are described.

1. Preparation method of magnetic medium

In this example, the preparation method of the quantum carbon magnetic medium is shown in the following two examples.

Example 1:

(1) Dissolving H12Cl3FeO6 and FeC 12.4H 2O in the mass ratio of (2.8-3.2) to 1 in the ionized water, wherein the added solute weight per 100ml of the ionized water is as follows: 6.5-7.5 g;

(2) Heating the solution in the step (1) in a water bath, continuously stirring, heating, introducing nitrogen for protection in the heating process, heating to 40-60 ℃, dropwise adding concentrated ammonia water until the pH of the solution is about 9, keeping the temperature stable, and reacting for more than 1 hour;

(3) after the reaction is finished, transferring the liquid in the flask into a beaker, and standing for precipitation;

(4) Removing the supernatant of the mixture after standing and precipitating, and adding deionized water to wash for three times until the pH value of a washing liquid is about 7 to obtain nano ferroferric oxide;

(5) adsorbing the water at the bottom of a beaker by using a magnet, draining the water, and then adding deionized water and quantum carbon liquid, wherein the ratio of the deionized water to the nano ferroferric oxide to the quantum carbon liquid is as follows: 100 ml: (3-3.6 mg): (60-70 ml);

(6) Adding the shell activated carbon into the mixture obtained in the step (5), and stirring at the rotating speed of 400-600 r/min for 20-60 minutes; wherein, 1.9-2.1g of shell activated carbon is added into each 100ml of mixture solution;

(7) Adsorbing the water at the bottom of the beaker by using a magnet, filtering the water to dryness, and drying the water in an electric heating oven;

(8) placing the dried medium in a muffle furnace in an oxygen-free atmosphere for roasting and activating, and then cooling;

(9) And grinding the cooled product to obtain a product between 80um and 120um to obtain the quantum carbon magnetic medium.

Wherein, H12Cl3FeO6 is ferric chloride hexahydrate.

example 2:

(1) Dissolving 25.3g of H12Cl3FeO6 and 8.6g of FeC 12.4H2O in a 500ml deionized water beaker, and transferring the beaker into a three-neck flask after complete dissolution;

(2) Heating the three-neck flask in a water bath, continuously stirring, and introducing nitrogen for protection in the heating process;

(3) Heating to 60 ℃, and dropwise adding concentrated ammonia water, wherein the pH is controlled to about 9;

(4) keeping the temperature stable and the reaction time 1 hour;

(5) transferring the liquid in the bottle into a beaker, and standing for precipitation;

(6) Removing supernatant, adding deionized water, washing for three times, and controlling the pH to be about 7 to obtain 9.8g of nano ferroferric oxide;

(7) Adsorbing at the bottom of the beaker by using a 3000Gs permanent magnet, draining water, and adding 300ml of deionized water;

(8) Adding 200ml of quantum carbon liquid into the mixture for reaction, and stirring the mixture at the same time, wherein the rotating speed is 500r/min, and the stirring time is 30 minutes;

(9) 9.8g of shell activated carbon is added into the mixture to react while stirring, the rotating speed is 500r/min, and the stirring time is 30 minutes;

(10) Adsorbing with 3000Gs permanent magnet at the bottom of the beaker, filtering water to dry, and drying in an electrothermal oven at 100 ℃;

(11) and (3) placing the dried medium in a muffle furnace at 550 ℃ in an oxygen-free atmosphere for roasting and activating for 4 hours, and naturally cooling.

(12) grinding the cooled product to 80-120 um to obtain the invented product quantum carbon magnetic medium.

Wherein the shell activated carbon is walnut shell-like vegetable carbon with the particle size of 50-100 um, and the iodine value is more than or equal to 1200 mg/g; the strength is more than or equal to 95 percent.

In the embodiment, the quantum carbon liquid is an aqueous solution containing quantum carbon, and the ORP of the quantum carbon liquid is 280mv-380mv, the conductivity sigma is 1-5ms/cm, the electromotive force is 280mv-380mv, the pH value is 1.5-3.2, and the solute concentration is 0.1% -0.45%. The solute of the quantum carbon liquid is composed of oxidized single-layer graphene and carbon particles (short for quantum carbon particles) of multi-layer graphene (less than or equal to 10 layers), and the mass fraction ratio of the single-layer graphene to the multi-layer graphene is 2-4: 8-6. The graphene is a periodic honeycomb two-dimensional carbonaceous material formed by arranging sp2 hybridized carbon atoms in a hexagon, and the thickness of the single-layer graphene is 0.335 nm. The oxidized surface of the quantum carbon particle has a plurality of oxygen-containing groups, such as hydroxyl, carbonyl, carboxyl and other active groups, and the mass fraction of the oxygen content of the quantum carbon particle as a whole is 40-60%.

In sewage treatment, particularly in the case of metal ions in water, heavy metal ions are difficult to remove effectively by biological methods and chemical methods, so that the adsorption method is one of the most effective methods for removing heavy metal ions at present, and the quantum carbon particles have good water solubility and easily changeable chemical activity due to the fact that the surfaces of the quantum carbon particles contain rich high-activity oxygen-containing functional groups and can react with the metal ions.

carboxyl and carbonyl and hydroxyl and epoxy groups which are randomly distributed are distributed on the surface of the quantum carbon particle, and a large number of hydroxyl and carboxyl on the surface increase the negative charge density of the surface of the quantum carbon, so that the strong complexation and electrostatic interaction with metal ions are enhanced, and the adsorption of the metal ions is promoted. The existence of a large number of functional groups provides rich adsorption sites for the quantum carbon particles, and the structural characteristics of the quantum carbon particles enable the quantum carbon liquid to become a high-performance adsorption material.

the quantum carbon magnetic medium has a super-paramagnetic characteristic by the preparation of the quantum carbon magnetic medium of the embodiment, in sewage, the quantum carbon magnetic medium rapidly adsorbs various metal ions in liquid, and is adsorbed into a three-dimensional paramagnetic metal chain net (figure 6-1) under the action of a strong magnetic field, and the quantum carbon magnetic medium and the adsorbed pollutants including the metal ions are conveyed to an air blowing and air suction bell mouth through the mechanical transmission of the metal chain net.

2. Magnetic medium activation method

the quantum carbon magnetic medium is reduced in adsorption capacity due to saturation tendency of adsorption in repeated use. In the detection at the sampling detection port 1 in the equipment system of the invention, the quantum carbon magnetic medium is completely recycled before any index of the treated water approaches to the marked line, and the medium is replaced by a new medium. And activating the recovered quantum carbon magnetic medium. The activation treatment steps are as follows:

(1) Putting the recovered quantum carbon magnetic medium and deionized water into an ultrasonic container according to the proportion of 1:3, and treating for 1 hour by using ultrasonic waves with the frequency of 25KHz while stirring;

(2) adding new deionized water with the same amount into the filtered water, and continuously stirring and ultrasonically treating for 1 hour; repeating the method (1) and the method (2) for three times, filtering and drying in an oven at 100 ℃;

(3) and (3) placing the dried medium in a muffle furnace in an oxygen-free atmosphere at 550 ℃ for roasting and activating for 4 hours, and naturally cooling.

(4) the cooled product is ground and sieved to a product between 80um and 120 um.

The quantum carbon magnetic medium activated by the method can still keep more than 95% of adsorption activity.

Preparation and activation method of five-quantum carbon photoreaction medium

the following describes the preparation and activation of the quantum carbon photoreaction medium used in the organic decomposition process of this example.

1. preparation method of quantum carbon photoreaction medium

Example 1

The preparation method of the quantum carbon photoreaction medium of the embodiment is as follows:

(1) stirring and mixing quantum carbon liquid, TiO2, high-purity water and a proper amount of N (CH3)4 OH.5H2O, and heating to prepare slurry, wherein the ratio of the quantum carbon liquid to the TiO2 is 100 ml: 200g of the total weight of the mixture; putting the slurry into an oven for drying and curing to obtain an Rh-C/TiO2 product;

(2) Mixing the Rh-C/TiO2 product, dried zeolite powder and H3PtCl6 & 5.3H2O containing 1 wt% of Pt metal to prepare slurry;

(3) drying, curing and calcining the slurry obtained in the step (2) to obtain the Rh-Pt-C-M/TiO2 composite photocatalytic oxide, cooling and grinding the composite photocatalytic oxide to obtain a product of 200 meshes to 300 meshes, namely the photoreaction medium.

Example 2

(1) 50g of TiO2 and 50g of zeolite (M) were dispersed in a beaker containing 200ml of high-purity water, and stirred at room temperature (non-metal for a stirring rotor) for several minutes to remove water. Repeating for three times;

(2) drying in a vacuum drying oven at 80 deg.C for use. Respectively weighing 25ml of quantum carbon liquid, 50g of TiO2 dried powder and Rh (NO3)3 containing 5% of Rh metal by weight;

(3) Adding quantum carbon liquid, TiO2, 350ml high-purity water and N (CH3)4 OH.5H2O into a three-neck flask, heating and mixing to prepare slurry with the temperature of 60 ℃ (adding small amount of Rh (NO3)3 into the flask during stirring, keeping the temperature at 60 ℃, and stirring for 1 hour);

(4) Drying and curing the slurry in an oven at 100 ℃ for 12 hours to obtain an Rh-C/TiO2 product;

(5) Adding the obtained Rh-C/TiO2 product, 50g of dried zeolite powder and H3PtCl6 & 5.3H2O containing 1 wt% of Pt metal into a three-neck flask respectively, and mixing to prepare slurry (slowly adding H3PtCl6 & 5.3H2O into the flask in small amount each time during stirring, stirring for 1 hour, and standing for 6 hours);

(6) and (3) putting the slurry into a drying oven at 100 ℃ for drying and curing for 12 hours, then putting the slurry into an electric drying oven at 380 ℃ in an oxygen-free atmosphere, calcining for 6 hours to obtain an Rh-Pt-C-M/TiO2 composite photocatalytic oxide, and grinding the product in an agate cone or a glass cone to 200-300 meshes after cooling to obtain the quantum carbon photoreaction medium.

The TiO2 is gas phase nano titanium dioxide TiO2P25 (a commercial product), and the average grain diameter of the titanium dioxide is 25nm, namely the titanium dioxide of anatase and rutile mixed phase. The zeolite (M) of the present invention is mordenite crushed to 300 mesh.

wherein N (CH3)4 OH.5H2O is tetramethylammonium hydroxide pentahydrate, and H3PtCl 6.5H2O is chloroplatinic acid hydrate.

2. Activation method of quantum carbon photoreaction medium

The quantum carbon photoreaction medium prepared by the invention can keep catalytic oxidation capacity and activity for a long time and has slow attenuation when being repeatedly used. However, in the detection at the sampling detection port 2 in the equipment system of the invention, the quantum carbon photoreaction medium is completely recycled and replaced by new medium before any index of the treated water approaches the marked line. And activating the recovered quantum carbon photoreaction medium. The activation treatment steps are as follows:

(1) Putting the recovered quantum carbon photoreaction medium and deionized water in an ultrasonic container according to the proportion of 1:3, and treating for 1 hour by using ultrasonic waves with the frequency of 25KHz while stirring;

(2) Adding new deionized water with the same amount into the filtered water, and continuously stirring and ultrasonically treating for 1 hour;

(3) Repeating the method (1) and the method (2) for three times, filtering and drying in an oven at 100 ℃;

(4) Placing the dried medium in a muffle furnace at 380 ℃ in an oxygen-free atmosphere, and calcining for 4 hours;

(5) cooling, grinding and sieving to obtain product of 200-300 meshes

the quantum carbon photoreaction medium activated by the method can still keep more than 95 percent of catalytic oxidation activity.

sixth, effect of implementation

for the scheme of the invention, the implementation effect is analyzed and verified by two engineering examples. The details are as follows.

example 1

In a certain electroplating organic ink factory, the production wastewater of the factory is 300 tons/day, and wastewater generated by each unit of a production line is collected and treated in a centralized manner. The various indexes and treatment effects of the inlet water quality are shown in the following table:

TABLE 1 treatment effect of wastewater and statistical data of medium circulation in electroplating organic ink plant

The index pair ratio is shown in fig. 16, and the specific embodiment is as follows:

The wastewater of the factory enters the polluted water purification equipment system of the invention, the input amount of the quantum carbon magnetic medium is 1.2 percent (weight ratio) of the sewage, and the input amount of the quantum carbon photoreaction medium is 1.5 percent (weight ratio) of the sewage; the superconducting magnet adopts a low-temperature superconducting magnet (as an outline drawing of the superconducting magnet shown in fig. 4-1 and 4-2), the refrigerant is liquid helium, the current terminal supplies current 114A to the superconducting body, the temperature monitoring control is 4K, the vacuum exhaust is 10-6hPa, the magnetic field center is 2T, and a high-gradient magnetic field is provided for the magnetic separation system. The other parts of the equipment system are processed according to the preferred parameters of the invention. The treatment result completely reaches the standard, and particularly, the treatment removal rate of heavy metals is over 96 percent, and some treatment removal rates are close to 100 percent. The treatment effect and medium circulation statistical data show that the removal rate of the chemical oxygen demand CODcr is still kept between 96% and 97% after the quantum carbon magnetic medium and the quantum carbon photoreaction medium are subjected to wastewater treatment repeatedly for 20 times; the removal rate of ammonia nitrogen is kept between 97 percent and 98 percent; the total copper removal rate is kept between 98% and 99%; the removal rate of the total lead is kept between 97 and 99 percent; the total phosphorus removal rate is kept between 97% and 99%; the pH value is stabilized between 6 and 9, which shows that the quantum carbon magnetic medium and the quantum carbon photoreaction medium still maintain high synergistic activity after 20 times of repeated use in synergistic use.

Example 2

The reuse experiment of a certain printed circuit board factory waste water, this factory production waste water is 30 tons/day, and the waste water that each unit of production line produced is concentrated and is collected, and unified treatment. The water quality indexes and treatment effect of the inlet water are shown in the following table, and the wastewater treatment effect and medium circulation statistical data of a certain printed circuit board factory are shown in the following table:

TABLE 2 statistical data on the treatment effect and medium circulation of wastewater from a certain printed circuit board plant

the effect is shown in fig. 17-1 and 17-2. The specific embodiment is as follows:

The wastewater of the factory enters the polluted water purification equipment system of the invention, the input amount of the quantum carbon magnetic medium is 1.0 percent (weight ratio) of the sewage, and the input amount of the quantum carbon photoreaction medium is 1.2 percent (weight ratio) of the sewage; the other parts of the equipment system are processed according to the preferred parameters of the invention. The treatment result completely reaches the standard, and especially has obvious effect on improving indexes such as COD, ammonia nitrogen and the like. The treatment effect and medium circulation statistical data show that the removal rate of the chemical oxygen demand CODcr is kept between 91% and 93% after the quantum carbon magnetic medium and the quantum carbon photoreaction medium are subjected to 10 times of repeated wastewater treatment; the removal rate of ammonia nitrogen is kept between 94% and 97%; the turbidity is kept between 3.2 and 4.4; the pH value is stabilized between 6 and 9, which shows that the quantum carbon magnetic medium and the quantum carbon photoreaction medium still maintain high synergistic activity capability after 10 times of repeated use in synergistic use.

The waste water according to the present invention includes, but is not limited to, waste water discharged from various factories, such as electroplating factories, printing factories, chemical factories, electronic industry factories, paper factories, food factories, etc. Also includes municipal sewage and sewage discharged in daily life. But also river water, surface water, underground water and the like. The wastewater may be subjected to a centralized purification treatment by a wastewater treatment plant.

The pollutants in the sewage include various substances, such As heavy metal ions of chromium (Cr), arsenic (As), cadmium (Cd), zinc (Zn), nickel (Ni), mercury (Hg), lead (Pb) and the like. Also included are organic materials, materials that cause an increase in the COD (chemical oxygen demand), BOD (biological oxygen demand) and TOC (total organic carbon) indices. These substances are merely examples, but are not limited thereto, and include specific chemical structures such as bacteria, viruses, and the like.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. a magnetic separation mechanism, comprising: a magnetic separation tank (7) located in the magnetic field region, wherein a metal chain net hinged on a movable wheel is arranged in the magnetic separation tank (7), and the metal chain net can rotate around the movable wheel so as to move from the liquid side to the air flow range of an air blowing horn mouth of the magnetic medium extraction mechanism; the metal chain net comprises a plurality of transverse shafts, the end parts of the adjacent transverse shafts are connected through chain rings, chain net surfaces are arranged on the transverse shafts, and the chain net surfaces are formed by winding chain wires in a wave shape in a three-dimensional space.

2. A magnetic separation mechanism according to claim 1 wherein the wire mesh is at least partially located between two oppositely disposed air blowing horns, one of which is at positive pressure and the other of which is at negative pressure.

3. A magnetic separation mechanism according to claim 1 wherein the metal chain mesh is a three dimensional metal mesh made from a paramagnetic metal.

4. A magnetic separating mechanism as claimed in claim 1 wherein one end of the wire mesh is hinged to the driven wheel and the other end is hinged to the driving wheel; the middle part of the magnetic separation tank body is provided with a plurality of tension wheels connected with the metal chain net.

5. A magnetic separation mechanism according to claim 1, wherein the means for providing the magnetic field region comprises a superconducting magnet (6), the superconducting magnet (6) comprising in particular: the superconducting body (6-4), the vacuum exhaust port (6-8) and the current terminal (6-5) are arranged in the superconducting body (6-4), the refrigerant inlet (6-6) and the refrigerant outlet (6-7).

6. A magnetic separation mechanism according to claim 1, wherein the magnetic separation tank body (7) is provided with a liquid inlet and an overflow port (7-1), the liquid inlet and the overflow port (7-1) are respectively located at two sides of the metal chain net, and one side of the magnetic separation tank body (7) where the liquid inlet is located is provided with a structure which is gradually retracted inwards, the outer walls of each stage are parallel to each other, and an inclined reducing section is arranged between each stage.

7. a method for separating metal ions, comprising: adding quantum carbon magnetic media into the sewage, mixing, and separating the quantum carbon magnetic media adsorbed with metal ions from the sewage by utilizing a strong magnetic field; wherein the quantum carbon magnetic medium is a quantum carbon mixture with superparamagnetic property; the quantum carbon magnetic medium which adsorbs the metal ions is adsorbed on the rotatable metal chain net and is taken out by utilizing a magnetic field, and the quantum carbon magnetic medium on the metal chain net is adsorbed and separated by utilizing an air blowing horn mouth and is recovered; the metal chain net comprises a plurality of transverse shafts, the end parts of the adjacent transverse shafts are connected through chain rings, chain net surfaces are arranged on the transverse shafts, and the chain net surfaces are formed by winding chain wires in a wave shape in a three-dimensional space.