CN217025622U - Advanced treatment system for viscous wastewater - Google Patents

Abstract

The utility model provides an advanced treatment system for viscous wastewater, which comprises: a raw water tank for storing viscous wastewater; the air flotation device comprises an air flotation water inlet and an air flotation water outlet, and the air flotation water inlet is connected with the raw water tank; the middle water tank is used for storing air floatation water and is communicated with the air floatation water outlet; the filtering device comprises a filtering water inlet and a filtering water outlet, and the filtering water inlet is communicated with the middle water tank; the vibrating membrane filtering device for filtering micro-nano particles comprises a vibrating membrane water inlet end, a vibrating membrane concentrated water end and a vibrating membrane water production end, wherein the vibrating membrane water inlet end is communicated with a filtering water outlet, the vibrating membrane concentrated water end is communicated with an original water tank, and the vibrating membrane water production end is communicated with a reverse osmosis water inlet tank; and the reverse osmosis membrane device comprises a reverse osmosis water inlet end, a reverse osmosis concentrated water end and a reverse osmosis water production end, wherein the reverse osmosis water inlet end is communicated with the reverse osmosis water inlet tank, the reverse osmosis concentrated water end is used for being connected with the concentrated water treatment device, and the reverse osmosis water production end is used for being connected with the reverse osmosis water production tank.

Description

Advanced treatment system for viscous wastewater

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an advanced treatment system for viscous wastewater.

Background

The industrial wastewater comprises production wastewater and production sewage, and refers to wastewater and waste liquid generated in the industrial production process, wherein the wastewater and the waste liquid contain industrial production materials, intermediate products and byproducts which are lost along with water, and pollutants generated in the production process. The industrial wastewater has various types and complex components; wherein the treatment of viscous wastewater has been a difficult problem for wastewater treatment. The viscous wastewater mainly comes from the fields of printing and dyeing industry, leather industry, paper industry, coking industry, plastic industry and the like, and the conventional physical and chemical treatment process is influenced by the viscosity of the wastewater, so that the viscous wastewater needs to be treated by adopting a special treatment process.

FIG. 1 is a flow chart of a process used in the prior art for the advanced treatment of viscous wastewater. As shown in figure 1, the prior art adopts a process of a large cross flow tubular membrane and a reverse osmosis membrane to carry out advanced treatment on viscous wastewater; the tubular membrane in the process needs to adopt large cross flow to improve the flow velocity of liquid on the surface of the membrane so as to wash away pollutants attached to the surface of the membrane, and the power consumption is high. Besides the above treatment modes, the prior art can also adopt microfiltration/ultrafiltration and reverse osmosis processes to treat viscous wastewater; this treatment can result in significant fouling of the separation membrane, requiring frequent chemical cleaning. When the two conventional double-membrane process are adopted to treat viscous wastewater, in order to ensure the normal operation of the system, the powdered activated carbon is required to be continuously added, the powdered activated carbon adsorbing pollutants can be redefined as dangerous waste, and the operation cost is greatly improved.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present disclosure provides an advanced treatment system for viscous wastewater, which solves one or more problems of the prior art.

The utility model discloses a system for advanced treatment of viscous wastewater, which comprises: a raw water tank for storing viscous wastewater; the air flotation device comprises an air flotation water inlet and an air flotation water outlet, and the air flotation water inlet is connected with the raw water tank through a raw water pump; the middle water tank is used for storing air floatation water, and is communicated with an air floatation water outlet of the air floatation device; the filtering device is used for intercepting larger suspended particles and comprises a filtering water inlet and a filtering water outlet, and the filtering water inlet is communicated with the intermediate water tank through an intermediate water pump; the vibrating membrane filtering device is used for filtering micro-nano particles and nano-nano particles, and comprises a vibrating membrane water inlet end, a vibrating membrane concentrated water end and a vibrating membrane water production end, wherein the vibrating membrane water inlet end is communicated with the filtering water outlet, the vibrating membrane concentrated water end is communicated with the raw water tank, the vibrating membrane concentrated water end is communicated with the vibrating membrane water inlet end, and the vibrating membrane water production end is communicated with the reverse osmosis water inlet tank; the reverse osmosis membrane device comprises a reverse osmosis water inlet end, a reverse osmosis concentrated water end and a reverse osmosis water producing end, wherein the reverse osmosis water inlet end is communicated with the reverse osmosis water inlet tank, the reverse osmosis concentrated water end is used for being connected with a concentrated water treatment device, the reverse osmosis water producing end is used for being connected with the reverse osmosis water producing tank, and the reverse osmosis water producing end is used for being connected with the reverse osmosis water producing tank; the reverse osmosis concentrated water end is also communicated with the reverse osmosis water inlet tank and is used for enabling part of concentrated water generated by the reverse osmosis membrane device to flow back into the reverse osmosis water inlet tank.

In some embodiments, the air flotation device is an air flotation machine.

In some embodiments, the air flotation machine comprises an air flotation machine reaction tank and a dosing system for dosing a flocculation reagent into the air flotation machine reaction tank.

In some embodiments, the flocculating agent is polyaluminum chloride.

In some embodiments, the polyaluminum chloride is added in an amount of 10mg/L to 20 mg/L.

In some embodiments, the filtration device is a sand canister.

In some embodiments, the reverse osmosis membrane device comprises a reverse osmosis water inlet tank, a reverse osmosis feed pump, a cartridge filter, a reverse osmosis high pressure pump, and a reverse osmosis membrane assembly; the reverse osmosis water inlet tank is connected with the reverse osmosis water inlet end of the cartridge filter through the reverse osmosis water feed pump; the water outlet end of the cartridge filter is connected with the water inlet end of the reverse osmosis membrane component through the reverse osmosis high-pressure pump; the reverse osmosis concentrated water end and the reverse osmosis water production end are positioned on the reverse osmosis membrane component.

In some embodiments, the separation membrane of the vibrating membrane filtration device is an ultrafiltration membrane having a pore size of 50 nm.

In some embodiments, the vibrating membrane filtration device further comprises a high frequency system for generating intense shear forces, a screen assembly for effecting material separation, a water inlet system for delivering wastewater to the screen assembly, and a flushing, cleaning system for flushing, cleaning the screen assembly;

in some embodiments, the high frequency system has a vibration amplitude of 9 mm.

According to the viscous wastewater advanced treatment system disclosed by the embodiment of the utility model, the solid pollutants in the inlet water are floated from the surface of the membrane by using the vibrating membrane, so that the blockage of membrane pores is avoided; the filter speed of vibrating diaphragm is bigger than traditional static membrane, and the shearing force is produced by diaphragm self vibration, does not rely on the feed liquid velocity of flow who advances the membrane, compares and has lower energy consumption, better filter effect and stronger antipollution in traditional static membrane.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to what has been particularly described hereinabove, and that the above and other objects that can be achieved with the present invention will be more clearly understood from the following detailed description.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model. For purposes of illustrating and describing some portions of the present invention, corresponding parts may be exaggerated in the drawings, i.e., may be larger relative to other components in an exemplary device actually made according to the present invention. In the drawings:

FIG. 1 is a process flow diagram of a viscous waste water treatment system of the prior art;

FIG. 2 is a schematic structural view of a treatment system for treating PTFE wastewater according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so related to the present invention are omitted.

It should be emphasized that the term "comprises/comprising/comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

Here, it should be noted that the terms of orientation such as "upper" and "lower" appearing in the present specification refer to the orientation relative to the position shown in the drawings; the term "coupled" as used herein may mean not only a direct connection, but also an indirect connection in which an intermediate is present, unless specifically stated otherwise. A direct connection is one in which two elements are connected without the aid of intermediate elements, and an indirect connection is one in which two elements are connected with the aid of other elements. The term "viscous waste water" as used herein refers to waste water containing a viscous agent or substance, such as PTFE waste water, machining waste water, rubber waste water, etc., wherein the PTFE waste water may refer to PTFE waste water produced in the production of polytetrafluoroethylene, or may be waste water containing PTFE substance.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the attached drawings, the technical scheme of the utility model is further described by taking a treatment system for treating PTFE waste water as a specific embodiment; it should be understood that other viscous wastewater having the same properties as PTFE wastewater are equally suitable for use in the treatment system of this embodiment.

FIG. 2 is a schematic structural view of a treatment system for treating PTFE wastewater according to an embodiment of the present invention. As shown in fig. 2, the wastewater treatment system includes a raw water tank, an air flotation device, an intermediate water tank, a filtering device, a vibrating membrane filtering device, and a reverse osmosis membrane device. The raw water tank 10 is used for storing PTFE waste water to be treated; the air floatation device 30 is used for separating fine particles in the PTFE wastewater; the middle water tank 40 is used for storing the air floatation water output by the air floatation device 30; the vibrating membrane filtering device 70 is used for further filtering micro-nano particles and nano-nano particles in the wastewater; the reverse osmosis membrane device is used for separating soluble solids in the wastewater.

The air flotation device 30 has an air flotation water inlet and an air flotation water outlet, the air flotation water inlet is connected with the raw water tank 10 through the raw water pump 20, and the raw water pump 20 is used for conveying the PTFE wastewater in the raw water tank 10 to the air flotation device 30. The air flotation water outlet is connected with the intermediate water tank 40, and the intermediate water tank 40 is used for storing the air flotation water output from the air flotation device 30. The filtering device 60 comprises a filtering water inlet and a filtering water outlet, the filtering water inlet is connected with the intermediate water tank 40 through an intermediate water pump 50, and the intermediate water pump 50 is used for conveying the PTFE waste water in the intermediate water tank 40 to the filtering device 60; the filtering device 60 receives the wastewater from the intermediate water tank 40 by the intermediate water pump 50, and further reduces the turbidity and suspended matter of the PTFE wastewater. The vibrating membrane filtering device 70 comprises a vibrating membrane water inlet end, a vibrating membrane concentrated water end and a vibrating membrane water production end; the water inlet end of the vibrating membrane is connected with a filtered water outlet of the filtering device 60 and is used for receiving PTFE waste water which flows out after being filtered by the filtering device 60; the concentrated water end of the vibrating membrane is connected with the raw water tank 10 and is used for conveying concentrated water generated by the vibrating membrane filtering device 70 to the raw water tank 10 and then to the air floating device 30 through the raw water pump 20 for retreatment, or the concentrated water end of the vibrating membrane can flow back to the water inlet end of the vibrating membrane and enter the vibrating membrane device again for filtering; the water producing end of the diaphragm may be connected to the reverse osmosis water inlet tank 81 so that the wastewater filtered by the diaphragm filtering device 70 further flows into the reverse osmosis water inlet tank. The reverse osmosis membrane device comprises a reverse osmosis water inlet end, a reverse osmosis concentrated water end and a reverse osmosis water production end; the reverse osmosis water inlet end is connected with the reverse osmosis water inlet tank so as to ensure that sewage in the reverse osmosis water inlet tank can be further conveyed to a reverse osmosis membrane device for treatment; the reverse osmosis concentrated water end can be connected with a concentrated water treatment device 86, and the concentrated water treatment device 86 can further treat sewage; the reverse osmosis water production end can be connected with a reverse osmosis water production tank 90.

The air floating device 30 may be an air floating machine, which includes an air floating reaction tank and a chemical feeding system 31. The dosing system 31 is used for adding a flocculating agent into the air floatation machine reaction tank, and the PTFE wastewater and the flocculating agent are fully mixed in the air floatation machine reaction tank and are subjected to flocculation reaction. The dosing system can be arranged beside a reaction tank of the air flotation machine or can be independently arranged in a dosing room. In the treatment process, PTFE wastewater enters a raw water tank 10 through a pipeline and is then conveyed into a reaction tank of an air floatation machine by a raw water pump 20, and a flocculating agent is added into the reaction tank of the air floatation machine by a dosing system 31; fully mixing PTFE wastewater with a flocculating agent in a reaction tank of an air flotation machine, and carrying out flocculation reaction to form macroscopic suspended particles; then flows into the air flotation tank through a middle water inlet hole of the air flotation machine and is fully contacted with a large number of micro-bubble groups released from the bottom of the tank by the dissolved air tank; suspended matters in the wastewater slowly rise under the carrying of the micro bubbles and absorb extremely fine particles in the wastewater, and finally float on the water surface and are scraped to a scum collecting tank 32 by a scum scraper; the particles in the scum collecting tank 32 are further dehydrated by a dehydrator, and the dehydrated scum is disposed outside; the dehydrator can be a paper bag dehydrator. It should be understood that, besides the dissolved air flotation method, the air flotation device 30 may also use other air flotation methods; such as electrolytic air flotation, cavitation air flotation, etc. The electrolytic floatation is to intercept and float flocculated suspended matters to the water surface by tiny bubbles of hydrogen and oxygen generated by electrolysis, so as to achieve the aim of solid-liquid separation; the bubbles generated by the electrolytic air flotation are smaller than the size of the bubbles generated by the dissolved air flotation, and the electrolytic air flotation has the effects of oxidation, decoloration and sterilization in the treatment process. The cavitation air flotation is used for treating various kinds of sewage by adopting the principle of combining mechanical aeration with chemical flocculation, and has the advantages of low investment, low energy consumption and low noise compared with dissolved air flotation.

Further, the flocculating agent can be PAC (polyaluminium chloride), and the dosage of the PAC can be 10mg/L to 20 mg/L. PTFE powder and other pollutants in the wastewater are subjected to flocculation reaction with PAC, so that the PTFE powder and other pollutants are coagulated into suspended particles; a part of the suspended particles are filtered in advance by the air floating device 30; the PTFE wastewater treated by the floatation device 30 flows to the intermediate water tank 40 through the floatation water outlet for subsequent treatment. The pollutants that are not flocculated into large particles flow to the subsequent vibrating membrane filtering device 70 along with the wastewater for treatment, and the pollutants are intercepted and conveyed to the raw water tank 10 by the vibrating membrane filtering device 70, and then conveyed to the air flotation device 30 again through the raw water pump 20 for treatment. It should be understood that besides only adding PAC, the flocculating agent can also be used in combination with other flocculating agents; it should be noted that, in order to ensure the stable operation of the system, the dosage of PAM should be avoided to block the vibrating membrane and the reverse osmosis membrane in the subsequent treatment.

In one embodiment of the present invention, the filter device 60 employs a sand canister; the middle water tank 40 is connected with the water inlet of the sand filtration tank through a middle water pump 50, and the middle water pump 50 is used for conveying air floatation effluent in the middle water tank 40 to the sand filtration tank; the water outlet of the sand filtration tank is connected with the vibration membrane filtering device 70 to ensure that the sewage filtered by the sand filtration tank is conveyed to the vibration membrane filtering device 70. After the intermediate water pump 50 delivers the sewage in the intermediate water tank 40 to the sand filtration tank, the sand filtration tank further filters out large suspended particles in the sewage to reduce the inflow turbidity, SS (suspended solids), and SDI (sludge density index) of the diaphragm filter device 70. The water inlet pressure of the sand filtration tank can be set to meet the water inlet pressure requirement of the vibrating membrane filtration device 70, because the water outlet pressure loss of the sand filtration tank is very small under the condition that a water tank and a water lifting pump are not arranged between the sand filtration tank and the vibrating membrane filtration device 70, the difference value between the water outlet pressure and the water inlet pressure is very small, and the sand filtration tank conveys the sand filtration water to the vibrating membrane filtration device 70 by utilizing the excess pressure of the water outlet; in order to ensure the stable operation of the process of the vibrating membrane filtering device 70, it should be ensured that the water inlet pressure of the sand filtration tank needs to meet the pressure requirement of the vibrating membrane filtering device 70. It should be understood that the main function of the filtering device 60 is to filter out the large suspended particles in the sewage before the sewage enters the vibrating membrane filtering device 70, and other filtering devices besides the sand filter tank can be used instead; such as a multi-media filter, etc.

In some embodiments, the separation membrane in the vibrating membrane filtration device 70 is an ultrafiltration membrane, the pore size of the ultrafiltration membrane can be selected to be between 10nm and 100nm, and the cut-off molecular weight of the ultrafiltration membrane is between 1000 and 500000 daltons; specifically, the membrane pore size of the ultrafiltration membrane may be set to 50 nm. During specific filtration, the ultrafiltration membrane takes the pressure difference between two sides of the membrane as a driving force and the ultrafiltration membrane as a filter medium to realize the purposes of purification, separation and concentration of the stock solution; therefore, the filter has the characteristics of good filtering effect and strong stability. And the anti-pollution performance of the vibrating membrane is strong, the type and the adding amount of the medicament added into the system are small, and powder active carbon is not required to be added in the treatment process, so that the generation of dangerous waste is avoided. The sewage after the sand filtration device filters further gets into vibrating membrane filter equipment 70 and handles, and vibrating membrane filter equipment 70 gets rid of remaining little in the sewage, nano-particle, colloid, bacterium, macromolecule organic matter to satisfy reverse osmosis membrane device's the requirement of intaking. It should be understood that the pore size of the vibrating membrane can be selected according to the size of the organic matter to be filtered; besides the ultrafiltration membrane, the vibrating membrane can also be selected from other types of filtering membranes which can meet the filtering effect.

Further, the vibratory ultrafiltration membrane may be cross-flow filtered. The cross-flow filtration enables the filtrate to be filtered out in a tangential-flow mode; and the non-filtrate forms turbulent flow due to high-speed movement, the surface of the membrane is continuously washed, and a small amount of solid matters attached to the membrane are taken away, so that the blockage of the filter membrane is prevented, and the normal operation of filtration is kept. The cross flow filtration recovery rate can reach more than 90 percent, the water yield of a single vibration ultrafiltration membrane reaches more than 300L/h, and the turbidity mean value of the produced water reaches below 0.33 NTU.

In one embodiment of the present invention, the vibrating membrane filtration device 70 includes a high frequency system, a screen assembly, a water inlet system, and a flushing, cleaning system. The sewage treated by the sand filtration device is conveyed to a water inlet system of the vibrating membrane filtration device 70 through a sand filtration water outlet, and the water inlet system conveys the sewage to the screening component; the high-frequency system generates high-frequency motion and drives the screening assembly to realize material separation. The vibrating membrane is different from the conventional micro/ultrafiltration membrane and tubular membrane, and floats viscous powder in PTFE wastewater from the surface of the membrane by means of strong shearing force and normal force generated by a self vibration exciter, and flows out of a membrane system along with concentrated water forming a turbulent flow effect, so that the blockage and pollution of membrane holes are greatly reduced, the decline of water production flux of the vibrating membrane or the rising trend of system pressure difference is slowed down, and the chemical cleaning period of the vibrating membrane is prolonged. The water produced by the vibrating membrane almost does not contain viscous PTFE powder, and the turbidity is stable at a lower value, so that excellent water inlet quality is provided for the subsequent reverse osmosis membrane, and the stable operation of a reverse osmosis membrane system is ensured. During treatment, PTFE powder is inevitably adhered to the screen assemblies, and the screen assemblies need to be washed or cleaned reasonably in order to avoid blockage of the screen assemblies of the vibrating membrane system due to accumulation of the PTFE powder for a long time; the washing and cleaning system can automatically realize the operations of washing the screening components with clear water, chemically cleaning and the like, and the operation can reduce the difficulty in manually cleaning the membrane system. In addition, the filtering speed of the vibrating membrane is higher than that of the traditional static membrane, the shearing force is generated by the vibration of the membrane, the energy consumption is reduced compared with that of the traditional static membrane, the filtering efficiency is improved, and the pollution resistance is enhanced.

Further, the vibration amplitude of the high frequency system in the vibration membrane filtration device 70 was set to 9 mm. The vibration amplitude is a non-negligible factor influencing the screening effect of the screening assembly; the amplitude is increased, the phenomenon of screen hole blockage is greatly reduced, and the materials are also beneficial to layering; but too large an amplitude will be more damaging to the equipment. Therefore, the magnitude of the vibration should be selected based on the application, e.g., when the size of the material to be screened is relatively small, the magnitude of the vibration of the screen assemblies should be correspondingly increased; because the polytetrafluoroethylene powder in the PTFE waste water is extremely tiny (nanometer) and has certain viscidity, the vibrating diaphragm adopts the super-frequency vibration technique, and its vibration range can set up to 9mm, and this setting has effectively reduced the speed that the separation membrane surface particulate matter piles up the jam. Compared with the conventional micro/ultra-filtration membrane device, the ultra-frequency vibration technology adopted by the screening component avoids the phenomenon that sieve pores are easily blocked in the operation, and the condition that the pressure difference of the separation membrane rises quickly and needs to be cleaned frequently.

In one embodiment of the present invention, the reverse osmosis membrane apparatus includes a reverse osmosis inlet tank 81, a reverse osmosis feed pump 82, a cartridge filter 83, a reverse osmosis high pressure pump 84, and a reverse osmosis membrane module 85. The reverse osmosis water inlet tank 81 is communicated with a vibrating membrane water production end of the vibrating membrane filtering device, so that the wastewater filtered by the vibrating membrane filtering device is further conveyed into the reverse osmosis water inlet tank 81 through the vibrating membrane water production end; the reverse osmosis water inlet end of the cartridge filter 83 is connected with the reverse osmosis water inlet tank 81 through a reverse osmosis water feed pump 82, and the reverse osmosis water feed pump 82 is used for conveying sewage in the reverse osmosis water inlet tank 81 to the cartridge filter 83; the security filter 83 further filters fine substances in the sewage to meet the requirement of the subsequent reverse osmosis membrane component 85 on water inflow; the water outlet end of the cartridge filter 83 is connected with the water inlet end of the reverse osmosis membrane module 85 through a reverse osmosis high-pressure pump 84, and the reverse osmosis high-pressure pump 84 is used for conveying the sewage filtered by the cartridge filter 83 to the reverse osmosis membrane module 85. The reverse osmosis membrane assembly 85 also comprises a reverse osmosis concentrated water end and a reverse osmosis water producing end; the reverse osmosis concentrated water end can be connected with an external concentrated water treatment device 86, so that concentrated water generated by the reverse osmosis membrane device flows into the concentrated water treatment device 86 from the reverse osmosis concentrated water end, and is further treated by other processes; the reverse osmosis water production end may be connected to the reverse osmosis water production tank 90 for flowing the water produced after treatment by the reverse osmosis membrane device from the reverse osmosis water production end into the reverse osmosis water production tank 90.

As can be seen from the above embodiments, the PTFE wastewater treatment system disclosed by the utility model avoids the blockage of the membrane pores by floating the solid pollutants in the inlet water from the surface of the membrane by using the vibrating membrane; the filter velocity of vibrating diaphragm is big than traditional static membrane, and the shearing force is produced by diaphragm self vibration, does not rely on the feed liquid velocity of flow of advancing the membrane, compares that to have lower energy consumption, better filter effect and stronger antipollution in traditional static membrane.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments in the present invention.

The above-mentioned embodiments illustrate and describe the basic principles and main features of the present invention, but the present invention is not limited to the above-mentioned embodiments, and those skilled in the art should make modifications, equivalent changes and modifications without creative efforts to the present invention within the protection scope of the technical scheme of the present invention.

Claims (10)

1. An advanced treatment system for viscous waste water, the system comprising:

a raw water tank for storing viscous wastewater;

the air flotation device comprises an air flotation water inlet and an air flotation water outlet, and the air flotation water inlet is connected with the raw water tank through a raw water pump;

the middle water tank is used for storing air floatation water, and is communicated with an air floatation water outlet of the air floatation device;

the filtering device is used for intercepting larger suspended particles and comprises a filtering water inlet and a filtering water outlet, and the filtering water inlet is communicated with the intermediate water tank through an intermediate water pump;

the vibrating membrane filtering device is used for filtering micro-nano particles and nano-nano particles, and comprises a vibrating membrane water inlet end, a vibrating membrane concentrated water end and a vibrating membrane water production end, wherein the vibrating membrane water inlet end is communicated with the filtering water outlet, the vibrating membrane concentrated water end is communicated with the raw water tank, the vibrating membrane concentrated water end is communicated with the vibrating membrane water inlet end, and the vibrating membrane water production end is communicated with the reverse osmosis water inlet tank;

the reverse osmosis membrane device is used for separating dissolved solids and comprises a reverse osmosis water inlet end, a reverse osmosis concentrated water end and a reverse osmosis water production end, wherein the reverse osmosis water inlet end is communicated with the reverse osmosis water inlet tank, the reverse osmosis concentrated water end is used for being connected with a concentrated water treatment device, and the reverse osmosis water production end is used for being connected with the reverse osmosis water production tank; the reverse osmosis concentrated water end is also communicated with the reverse osmosis water inlet tank and is used for enabling part of concentrated water generated by the reverse osmosis membrane device to flow back into the reverse osmosis water inlet tank.

2. The system for advanced treatment of viscous wastewater of claim 1, wherein the air flotation device is an air flotation machine.

3. The advanced treatment system for viscous wastewater according to claim 2, wherein the air flotation machine comprises an air flotation machine reaction tank and a dosing system for dosing a flocculation reagent into the air flotation machine reaction tank.

4. The advanced viscous wastewater treatment system of claim 3, wherein the flocculating agent is polyaluminum chloride.

5. The advanced viscous wastewater treatment system of claim 4, wherein the polyaluminum chloride is added in an amount of 10 to 20 mg/L.

6. The system for advanced treatment of viscous waste water of claim 1, wherein the filtration device is a sand filter tank.

7. The advanced treatment system for viscous wastewater according to claim 1, wherein the reverse osmosis membrane device comprises a reverse osmosis water inlet tank, a reverse osmosis water feed pump, a cartridge filter, a reverse osmosis high-pressure pump and a reverse osmosis membrane module; the reverse osmosis water inlet tank is connected with the reverse osmosis water inlet end of the cartridge filter through the reverse osmosis water feed pump; the water outlet end of the cartridge filter is connected with the water inlet end of the reverse osmosis membrane component through the reverse osmosis high-pressure pump; the reverse osmosis concentrated water end and the reverse osmosis water production end are positioned on the reverse osmosis membrane component.

8. The system for the advanced treatment of viscous wastewater according to any one of claims 1 to 7, wherein the separation membrane of the vibrating membrane filtration device is an ultrafiltration membrane, and the pore size of the ultrafiltration membrane is 50 nm.

9. The system for advanced treatment of viscous waste water of claim 1, wherein the vibrating membrane filtration device further comprises a high frequency system for generating intense shear forces, a screen assembly for effecting material separation, a water inlet system for delivering waste water to the screen assembly, and a flushing and cleaning system for flushing and cleaning the screen assembly.

10. The system for advanced treatment of viscous wastewater of claim 9 wherein the high frequency system has a vibration amplitude of 9 mm.

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