CN113582427B - Magnetic suspension centrifugal treatment method for wastewater - Google Patents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
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Abstract
The invention discloses a magnetic suspension centrifugal treatment method for wastewater. The method comprises the following steps: roughly filtering raw wastewater to obtain roughly filtered wastewater; and (4) carrying out centrifugal separation on the heavy metal-containing components of the coarsely filtered wastewater by adopting a magnetic suspension hydraulic centrifugal separation method to obtain the heavy metal-containing components and the heavy metal-removed wastewater. The invention adopts a magnetic suspension hydraulic centrifugal separation method to realize effective separation of heavy metal and macromolecular organic matter components in the wastewater and promote efficient purification and recycling of the wastewater.
Description
Technical Field
The invention belongs to the technical field of sewage and wastewater recycling, and relates to a magnetic suspension centrifugal treatment method for wastewater.
Background
The rational disposal of metallurgical waste water is a common problem facing the metallurgical industry. With the progress of metallurgical science, more and more metallurgical products are put into production and use, so that resource loss and pollutant discharge in wastewater are further complicated. Generally, metallurgical waste water contains various organic matters, acid/alkali components, metal ions and the like, no matter waste water generated in the technological process of a pyrogenic method or a wet method, the treatment difficulty of the metallurgical waste water is high when the waste water is purified by smoke with high organic matters and metal contents and the metallurgical waste water with certain high-concentration organic complex metal ions is treated, because heavy metals in the metallurgical waste water often exist in a complex state with macromolecular organic pollutants, the structure of a complex species needs to be oxidized, degraded and destroyed and then the heavy metal ions need to be recovered when the waste water is purified and recycled, the heavy metal component recovery and organic matter degradation difficulties are high, the treatment cost is high, and the problem of recycling the metals in the waste water is also more prominent.
At present, the common treatment methods for waste water in metallurgy and the like comprise physical, chemical, physical and chemical and biochemical treatment methods. The chemical treatment of waste water is to utilize chemical reaction to remove toxic and harmful substances from waste water, and to add chemical agent or reaction species to create relevant reaction conditions, so as to achieve the reactions of neutralization, coagulation, oxidation reduction or precipitation of the substances existing in the waste water, and to realize the treatment after the recovery of various organic matters, metal or non-metal ions, jelly, etc. The treatment method depends on the feasibility and the applicability of chemical reaction, and has the defects of high medicament cost, secondary pollution caused by introducing chemical medicament, poor single-step reaction treatment effect and the like. The physical and chemical method has strong recovery applicability for certain specific components in the wastewater, and usually adopts membrane separation, adsorption, electrochemical system processing and other processes, but the construction of related disposal systems and the operation process have higher cost. The biochemical method for treating the metallurgical wastewater is limited by heavy metal, salt and toxic organic matter with high concentration in multiple phases, and the speed of treating the metallurgical wastewater by microorganisms is relatively slow. The physical treatment of wastewater usually comprises settling, centrifuging, concentrating, filtering and other treatment modes, and mostly uses gravity, centrifugal force, mechanical interception and other separation effects, or treats wastewater according to the boiling point of pollutants contained in the wastewater and the difference of crystallization processes, the physical treatment process is relatively environment-friendly, but the resource utilization rate of the wastewater is usually not high.
The centrifugal separation technology is usually applied to various fields such as petroleum, chemical engineering, separation and metallurgy, coal, water purification and the like, is mainly divided into filtration type and sedimentation type centrifugal separation according to a centrifugal action mechanism, and is a relatively environment-friendly water treatment technology. Sedimentation type centrifugal separation is usually realized by rotating a rotor at a high speed, so that the mixed liquid or emulsion loaded in the rotor has different sedimentation speeds of components with different specific gravities under the action of strong centrifugal force, and the purposes of separating substances with different sedimentation coefficients and buoyancy densities are achieved. Generally, the more species in the mixed liquor that can be separated by settling as the centrifugal force increases, centrifugal separation of heavier ionic components in the solution phase can be achieved when the centrifugal force field is sufficiently large.
In conclusion, the defects of the existing wastewater treatment technology are mainly shown as follows:
1) Most of the treatment is carried out by adopting a chemical method, enough chemical reaction preparations and high-concentration reaction fields are required to be provided to destroy the complexing state of heavy metals in the metallurgical wastewater in advance, and the secondary chemical resource consumption and the secondary pollution risk are high.
2) Physical separation is difficult to obtain a better metallurgical wastewater purification effect, and the recovery and utilization rate of metals in wastewater is low.
3) The material is selected separately to traditional mechanical centrifugation mode processing relies on electric power drive machine part to provide and select separately the centrifugal force field, the heavy metal component that homogeneous phase dissolves in the metallurgical waste water is selected separately to the centrifugal force field intensity that centrifugal rate provided is difficult.
4) The magnetic suspension centrifugal separation technology is mostly applied to the separation of emulsion with low centrifugal rate and is still relatively blank when being applied to the field of metallurgical wastewater resource utilization.
Disclosure of Invention
Based on the above problems, the invention aims to provide a magnetic suspension centrifugal treatment method for wastewater, so as to solve the problems that effective separation of heavy metal and macromolecular organic matter components in wastewater such as metallurgy and the like cannot be realized, and efficient purification and recycling of wastewater cannot be realized in the prior art.
The above purpose of the invention is realized by the following technical scheme:
according to one aspect of the invention, the invention provides a wastewater magnetic suspension centrifugal treatment method, which comprises the following steps: roughly filtering raw wastewater to obtain roughly filtered wastewater; and (4) carrying out centrifugal separation on the heavy metal-containing components of the coarsely filtered wastewater by adopting a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal-containing component heavy water and heavy wastewater.
Optionally, the step of performing centrifugal separation of heavy metal-containing components on the coarsely filtered wastewater by using a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal-containing components and heavy wastewater, which includes: introducing an adsorption carrier into the roughly filtered wastewater to enable the carrier to be in a gel adsorption state in the heavy wastewater for adsorption reaction; after the adsorption reaction is finished, carrying out magnetic suspension hydraulic centrifugal separation on the heavy metal components to obtain heavy water containing the heavy metal components and heavy wastewater.
Optionally, the step of performing centrifugal separation of heavy metal-containing components on the coarsely filtered wastewater by using a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal-containing components and heavy wastewater, which includes: carrying out primary magnetic suspension hydraulic centrifugal separation on the coarsely filtered wastewater containing heavy metal components to obtain heavy metal component-containing heavy water and heavy wastewater; introducing an adsorption carrier into the heavy wastewater to enable the carrier to be in a gel adsorption state in the heavy wastewater for adsorption reaction; and after the adsorption reaction is finished, carrying out secondary magnetic suspension hydraulic centrifugal separation on the heavy metal components to obtain heavy water containing the heavy metal components and secondary heavy wastewater.
Optionally, the adsorption carrier is one or more of metal ions, inorganic fine particle adsorption materials and organic fine particle adsorption materials. The addition amount of the adsorption carrier is 0.1-1.2 times of the dosage required by saturated adsorption and sedimentation of heavy metal components to be separated in the wastewater. Further, the adsorption carrier is Fe 3+， ，Al 3+、 One or more of nano zeolite and active carbon.
Optionally, a plate and frame press filtration device is used for coarse filtration. The magnetic suspension hydraulic separation device is adopted to carry out magnetic suspension hydraulic centrifugal separation on heavy metal-containing components, and the operation mode is intermittent operation or continuous operation.
Optionally, a vertical magnetic suspension hydraulic centrifugal tank with a round large cone angle structure is adopted for centrifugal separation of heavy metal-containing components. The speed of the magnetic suspension hydraulic centrifugal separation is 20000 to 75000r/min.
Optionally, the method further comprises: and (4) recovering heavy metals and organic matters in the heavy metal-containing components. The method further comprises the following steps: and (4) carrying out salt component recovery and backwater circulation treatment on the heavy wastewater.
Optionally, the wastewater subjected to magnetic levitation hydraulic centrifugal separation is homogeneous or homogeneous-like wastewater.
Optionally, the raw wastewater is one or more of metallurgical wastewater, landfill leachate and pharmaceutical wastewater.
Compared with the prior art, the magnetic suspension centrifugal treatment method for wastewater has the following obvious advantages:
1) Based on the characteristic that heavy metal components contained in waste water of metallurgy and the like have relatively heavy specific gravity, the invention provides magnetic suspension high-speed separation and sedimentation of heavy components, recovers the heavy components and components difficult to purify, realizes separation and recovery of heavy metals and macromolecular organic matter components in the metallurgical waste water, and promotes efficient purification and recycling of the metallurgical waste water; in the treatment process, complex chemical or biochemical processes are not needed for substance recovery or water purification, so that secondary chemical resource consumption is avoided, and secondary pollution risk is reduced.
2) The invention adopts a magnetic suspension hydraulic separation method, can obtain a strong centrifugal force field and settle and separate heavy ion components under the state of low energy consumption; the problem of the separation difficulty that the centrifugal force field intensity that traditional centrifugation speed provided selects separately homogeneous phase or the heavy metal component of class homogeneous dispersion in the metallurgical waste water is solved, high manufacturing and the working costs of traditional control machinery centrifugation unit have effectively been overcome, control system has been simplified, expenses such as working cost, energy consumption have been reduced by a wide margin.
3) The method has strong applicability to organic wastewater containing heavy metals, greatly simplifies the wastewater treatment process, has high resource degree of each component of the wastewater, and has better effect than the traditional chemical and physicochemical wastewater utilization method.
4) In the optional embodiment of the invention, a colloidal carrier adsorption mode is formed by using a small amount of ions or adsorption materials, heavy metal components are adsorbed and then the heavy components are centrifugally separated by a magnetic suspension method, so that the recovery rate of the heavy components is improved.
Drawings
FIG. 1 is a schematic flow path diagram of a magnetic suspension centrifugal wastewater treatment method according to an embodiment of the invention.
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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 provides a magnetic suspension centrifugal treatment method for wastewater, which comprises the following steps: roughly filtering raw wastewater to obtain roughly filtered wastewater; and (4) carrying out centrifugal separation on the heavy metal-containing components of the coarsely filtered wastewater by adopting a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal-containing component heavy water and heavy wastewater. The invention separates and enriches the metal components in heavy metals and derivative complexes thereof by using a magnetic suspension high-speed centrifugal method, is suitable for separating homogeneous phase ion wastewater containing heavy components with specific gravity difference, and after separating the heavy components by magnetic suspension centrifugation, the residual components can realize the high-efficiency purification or recycling of salts and other components in the wastewater by adopting a conventional method, thereby realizing the full-recycling of metallurgical wastewater.
FIG. 1 schematically shows a flow path of a magnetic suspension centrifugal treatment method for wastewater in an alternative embodiment of the invention. In an alternative embodiment, as shown in fig. 1, the present invention provides a magnetic levitation centrifugal treatment method for wastewater, which may include:
1) Raw wastewater, such as metallurgical wastewater, is subjected to coarse particle filtration to separate and recover coarse suspended particles, thereby obtaining wastewater free of coarse particles, i.e., coarsely filtered wastewater.
In the step, the wastewater is filtered to remove coarse particle suspended matters, and the purpose of removing the coarse particle suspended matters in advance is to reduce the influence of the coarse particles on the magnetic suspension separation process.
Preferably, a plate-and-frame filter pressing device is adopted for filtering, so that coarse particle materials can be conveniently recovered, and coarse particle-free metallurgical wastewater can be obtained after filtering. Coarse particles larger than 0.074mm, such as Suspended Solids (SS) in wastewater, are filtered by a-0.074 mm plate-and-frame filter, for example.
2) Carrying out primary magnetic suspension hydraulic centrifugal separation on the roughly filtered wastewater containing the heavy metal components to obtain heavy metal component-containing heavy water and heavy dehydration wastewater; wherein, heavy metal recovery and organic matter disposal are carried out from heavy metal component heavy water.
The method comprises the steps of carrying out centrifugal separation of heavy metal-containing components on metallurgical wastewater without coarse particle homogeneous phase or similar homogeneous phase by using a magnetic suspension centrifugal device in a provided high-speed centrifugal force field, and fully utilizing the characteristic that heavy metal ions and organic matters in the metallurgical wastewater are complexed to form ionic compounds with large relative specific gravity or macromolecular organic matters with large specific gravity in the process so that heavy metal-containing species in the wastewater are subjected to centrifugal separation to obtain heavy metal-containing wastewater and heavy metal-removing light wastewater.
3) Introducing a small amount of adsorption carriers into the heavy wastewater (containing a small amount of heavy ion components) to enable the carriers to be in a gel adsorption state in the heavy wastewater, and carrying out adsorption reaction.
4) And after the adsorption reaction is finished, carrying out secondary magnetic suspension hydraulic centrifugal separation on heavy metal components to obtain heavy water containing the heavy metal components and secondary heavy wastewater. And in the same way, heavy water of heavy metal components is subjected to heavy metal recovery and organic matter disposal. The secondary heavy component removal wastewater can be returned to the metallurgical process, or the residual salt components in the wastewater are processed by a nanofiltration membrane system to obtain monovalent salt water and divalent salt water, and then the monovalent salt water and the divalent salt water are crystallized step by step to recycle salts; or after the heavy component-removed wastewater is distilled and concentrated, salts are separated out through magnetic suspension hydraulic centrifugal separation, and distilled water obtained in the concentration process returns to the flow.
In the magnetic suspension centrifugal separation process for metallurgical wastewater in the optional embodiment of the invention, based on the characteristic that the density of the complex component containing heavy metal dissolved in the homogeneous phase or the homogeneous-like phase in the metallurgical wastewater is relatively high, the magnetic suspension centrifugal method is utilized to carry out centrifugal separation on the heavy metal component in the metallurgical wastewater, and the adsorption-enhanced centrifugal separation technology added with a very small amount of preparation for forming micelles is used, so that the separation and recovery of the heavy metal and the macromolecular organic matter component in the metallurgical wastewater are realized, and the high-efficiency purification and recycling of the metallurgical wastewater are promoted.
In an alternative embodiment, the present invention provides a magnetic suspension centrifugal treatment method for wastewater, for example,
specifically, the processing method may include:
1) Roughly filtering raw wastewater to obtain roughly filtered wastewater;
2) Introducing an adsorption carrier into the coarsely filtered wastewater, so that the carrier is in a gel adsorption state in the heavy wastewater for adsorption reaction;
3) And after the adsorption reaction is finished, carrying out magnetic suspension hydraulic centrifugal separation on the heavy metal components by adopting a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal component-containing heavy water and heavy wastewater.
According to the optional embodiment of the invention, when the concentration of heavy metal ions in the wastewater is low, the coarse particle-free wastewater after filtration and separation is not subjected to primary magnetic suspension hydraulic centrifugal separation treatment, and the coarse particle-free wastewater is directly subjected to a mode of adding an adsorption carrier and performing centrifugal separation, namely a small amount of inorganic or organic adsorption carrier is added, and then the magnetic suspension centrifugal separation of heavy metal components is performed, so that the separation and recovery of heavy metal and macromolecular organic matter components in the metallurgical wastewater are realized, and the high-efficiency purification and recycling of the metallurgical wastewater are facilitated.
The adsorption carrier in the invention is a carrier for adsorption-enhanced separation, and can be a carrier which can promote the formation of colloidal state or suspension adsorption of heavy metal components in waste water of metallurgy and the like, such as a metal ion adsorption carrier, an inorganic adsorption carrier, an organic adsorption carrier and the like. Preferably, the adsorption carrier may be Fe 3+ 、Al 3+ Ions and other small amount of inorganic ions, or nanometer zeolite, active carbon and other inorganic or organic adsorbing fine particle material with adsorbing effect. Wherein the specific type and addition amount of the additive are selected according to the components contained in the metallurgical wastewater, and the dosage of the additive strengthening sedimentation agent, namely the addition amount of the adsorption carrier is the amount to be separated in the metallurgical wastewaterThe heavy metal component is 0.1 to 1.2 times of the dosage required by saturated adsorption and sedimentation.
The magnetic suspension hydraulic centrifugal device can adopt a device capable of realizing magnetic suspension hydraulic separation. The magnetic suspension hydraulic centrifugal device can be constructed in the existing mode, for example, a permanent magnetic suspension method is adopted to construct the magnetic suspension hydraulic centrifugal device, so that the separation operation cost is reduced. In particular, a vertical magnetic suspension hydraulic centrifugal tank with a round large cone angle structure is preferably adopted, and the large cone angle can facilitate the enrichment and separation of heavy components at the cone bottom. The wastewater treatment process is influenced by magnetic suspension hydraulic separation operation equipment, and gap operation or continuous operation can be adopted. The homogeneous phase or similar homogeneous phase metallurgical waste water moves in the magnetic suspension centrifugal field, the rotor can drive the waste water to move, and the magnetic suspension rotor can be placed in the waste water separation field and rotates based on the stress of the rotor, so that the waste water is driven to move in a suspension centrifugal mode. In the method, the magnetic suspension speed is adopted to regulate and control the speed required by the centrifugal separation of the heavy metal components and the pollutant components in the wastewater, and the speed is preferably 20000 to 75000r/min.
The invention is suitable for treating wastewater containing heavy metal and complex ions thereof, and is also suitable for treating macromolecular organic wastewater, including various chemical wastewater such as metallurgical wastewater, landfill leachate, pharmaceutical wastewater and the like. The magnetic suspension centrifugal separation method is applied to the waste water treatment processes of metallurgy and the like, so that the water purification of heavy metals and organic matters in the waste water and the recycling of the metal in the waste water are realized, and the metallurgical waste water treatment method and the magnetic suspension application field are widened. In the invention, the wastewater obtained by filtering and separating the coarse particles and the wastewater containing the enhanced colloidal adsorption material are homogeneous phase or homogeneous phase-like wastewater, and are suitable for magnetic suspension gravity separation environments.
The technical solutions of the present invention are further described below with reference to specific examples, it is obvious that the following examples are only a part of examples of the present invention, rather than all examples, and the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.
Example 1
The waste water of a nickel-cobalt hydrometallurgy system of a certain company is low-concentration industrial waste water containing heavy metal and oil pollutants, and the main chemical components and mass concentration (mg/L) are shown in Table 1.
TABLE 1 Main chemical Components and Mass concentrations of waste Water of Nickel cobalt hydrometallurgical System
| Ni | Cu | Pb | Co | Cr | Oils, their preparation and their use | Na | Mg | SO 4 2- | pH |
| 65.4 | 2 | 1.8 | 0.4 | 12.3 | 102 | 27000 | 21000 | 600000 | 9.5～10.2 |
Filtering the wastewater by adopting a-0.074 mm plate-and-frame filter to obtain coarse-grained wastewater, introducing the obtained coarse-grained wastewater into a magnetic suspension centrifugal separation device for magnetic suspension centrifugal separation, separating to obtain heavy components containing heavy metals and oil components and light wastewater, recovering more than 98% of the heavy metals and 85% of oil from the heavy components, wherein the concentration of the heavy metals reaches Ni 55g/L, cu 2g/L and Cr 12.3g/L, and the concentration of oil pollutants in the light wastewater is reduced to 5mg/L, so that the heavy metals can be used for concentrating and crystallizing to obtain high-purity salts.
Example 2
The high-salt high-COD organic wastewater produced in the production process of a certain pharmaceutical chemical plant contains 16.8 percent of NaCl, 20000mg/L of COD, 2.0 to 4.5g/L of total content of various heavy metals and 8.2 of pH. COD in the wastewater is mostly organic matter macromolecules organic pollutants with complex stable structures, and the oxidation and degradation are difficult.
The wastewater is filtered and then introduced into a magnetic suspension centrifugal separation device for centrifugal gravity separation to obtain heavy wastewater and light wastewater containing heavy metal components, wherein the heavy wastewater and the light wastewater contain 10% of raw water by mass, the COD concentration in the heavy wastewater is 40000mg/L, most of the heavy wastewater is nondegradable annular organic pollutants, and more than 98% of heavy metal ions are settled in the heavy component wastewater. Then, 0.3g/LFe was added to the light wastewater 3+ Stirring to form fully dispersed micelles to adsorb organic matters, and performing secondary magnetic suspension separation on the wastewater adsorbed by the formed stable micelles; 95% of organic pollutants are separated from the wastewater through two times of magnetic suspension, the COD of the effluent is reduced to 1000mg/L, and the effluent is mostly small-molecule organic pollutants and is easy to oxidize and degrade.
Example 3
In the aged landfill leachate of a certain landfill, COD in the leachate is 2000mg/L, the content of heavy metal ions is about 0.2g/L, pH is about 9.2, and the degradation of organic matters in wastewater is difficult.
Filtering the percolate, and then carrying out high-speed magnetic suspension centrifugal treatment to separate to obtain components containing heavy metals and organic pollutants with the mass of 5% relative to the raw water, wherein more than 80% of organic matters and metal pollutants enter heavy components. Adding 0.02mg/L of micro-fine particle activated carbon into the light component wastewater, fully stirring to enable the activated carbon to be basically suspended in the wastewater, then carrying out secondary magnetic suspension separation on the light component wastewater to obtain upper clear water and activated carbon for adsorbing pollutants, and after the primary magnetic suspension and the secondary magnetic suspension gravity separation treatment, reducing the COD of the wastewater to 200mg/L and leading the total weight of metal ion components to be less than 0.01g/L.
In the embodiment of the invention, the magnetic suspension centrifugal device is used for carrying out centrifugal separation on heavy metal-containing components of various kinds of wastewater without coarse particle homogeneous phase or similar homogeneous phase in a high-speed centrifugal force field, and the characteristic that heavy metal ions and organic matters in metallurgical wastewater are complexed to form ionic compounds with large relative specific gravity or macromolecular organic matters with large specific gravity is fully utilized in the process, so that heavy metal-containing species in the wastewater are subjected to centrifugal separation to obtain heavy metal-containing wastewater and heavy metal-removing light wastewater.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. A magnetic suspension centrifugal treatment method for wastewater is characterized by comprising the following steps:
coarsely filtering raw wastewater to remove coarse particles larger than 0.074mm to obtain coarsely filtered homogeneous or quasi-homogeneous wastewater; wherein, the raw water of the wastewater contains heavy metals and substances formed by complexing the heavy metals and organic pollutants;
carrying out high-speed centrifugal separation on the coarse-filtered homogeneous phase or homogeneous phase-like wastewater by adopting a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal component-containing heavy water and heavy wastewater; wherein the speed of magnetic suspension hydraulic high-speed centrifugal separation is 20000 to 75000r/min;
recovering heavy metals and organic matters in the heavy water containing the heavy metal components; and (3) carrying out salt component recovery and backwater circulation treatment on the heavy wastewater.
2. The magnetic suspension centrifugal wastewater treatment method according to claim 1, wherein the step of performing centrifugal separation of heavy metal-containing components on the coarsely filtered wastewater by using a magnetic suspension hydraulic centrifugal separation method to obtain heavy metal-containing components and heavy wastewater for removal comprises the following steps:
carrying out primary magnetic suspension hydraulic centrifugal separation on the wastewater containing the heavy metal components after rough filtration to obtain heavy metal component-containing heavy water and heavy dehydration wastewater; introducing an adsorption carrier into the heavy wastewater to enable the carrier to be in a gel adsorption state in the heavy wastewater for adsorption reaction; and after the adsorption reaction is finished, carrying out secondary magnetic suspension hydraulic centrifugal separation on the heavy metal components to obtain heavy water containing the heavy metal components and secondary heavy wastewater.
3. The magnetic suspension centrifugal treatment method for wastewater according to claim 2,
the adsorption carrier is one or more of metal ions, inorganic micro-particle adsorption materials and organic micro-particle adsorption materials;
the addition amount of the adsorption carrier is 0.1-1.2 times of the dosage required by saturated adsorption and sedimentation of heavy metal components to be separated in the wastewater.
4. The magnetic suspension centrifugal wastewater treatment method according to claim 3, wherein the adsorption carrier is Fe 3+ ，Al 3+ One or more of nano zeolite and active carbon.
5. The magnetic suspension centrifugal wastewater treatment method according to claim 1,
coarse filtration is carried out by adopting plate-and-frame filter pressing equipment;
the magnetic suspension hydraulic separation device is adopted to carry out magnetic suspension hydraulic centrifugal separation on heavy metal-containing components, and the operation mode is intermittent operation or continuous operation.
6. The magnetic suspension centrifugal treatment method for wastewater according to claim 5,
the centrifugal separation of heavy metal-containing components is carried out by adopting a vertical magnetic suspension hydraulic centrifugal tank with a rounded large cone angle structure.
7. The magnetic suspension centrifugal treatment method for wastewater as claimed in claim 1, wherein the raw wastewater is one of metallurgical wastewater, landfill leachate and pharmaceutical wastewater.
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