Electric flocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device

Abstract

The utility model relates to an electric flocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device, which comprises an adjustable direct current stabilized power supply, a submersible pump, an electric flocculation tank, a slow flow tank, a vertical gravity-driven ceramic membrane bioreactor, a water storage tank, an RO (Reverse Osmosis) pump, an RO membrane and a clean water tank, the adjustable direct-current stabilized power supply is connected with an internal electrode of the electric flocculation basin; according to the utility model, the electric flocculation is coupled with the ceramic membrane-RO membrane to carry out three-stage treatment, the water body is pretreated through the electric flocculation basin, part of organic matters and trace pollutants are removed, and then the water subjected to electric flocculation is treated by utilizing the anti-oxidation characteristic of the ceramic membrane, so that the organic matters are further removed, and the subsequent RO membrane pollution is slowed down; pressurizing and pumping the wastewater into an RO membrane by an RO pump for filtering, and conveying the wastewater generated in the reverse osmosis desalination treatment process of the RO membrane into the electric flocculation basin again; according to the utility model, through the construction of the integrated double-membrane method system equipment, the application devices can be conveniently integrated, and the popularization and the use are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to an electric flocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device. Background Art

[0002] The topic of water pollution is constantly being raised, especially the problem of groundwater pollution. According to the source classification, sewage treatment is generally divided into industrial sewage treatment and domestic sewage treatment. Industrial sewage includes industrial sewage, agricultural sewage and medical sewage, etc., while domestic sewage is sewage generated in daily life, which refers to a complex mixture of various forms of inorganic and organic matter, including: 1 floating and suspended solid particles of different sizes, 2 colloidal and gelatinous diffusions, 3 pure solutions; there are many ways to treat sewage, such as:

[0003] 1. Electrocoagulation technology is an electrochemical water purification method that uses electric current to dissolve the anode to produce cations (usually Al 3+ , Fe 3+ The electroflocculation reaction process is the result of the combined effects of adsorption neutralization, net capture, sweeping, oxidation, etc., and its adsorption capacity is much higher than that of general flocculants. Electroflocculation can remove different pollutants through specific pathways, and release a large number of metal ions through electrolytic oxidation of the anode. These flocculant ions will eventually combine with the hydroxide produced by the cathode in the water, aggregate into flocs, and then adsorb pollutants and form polymer precipitation, or float to the surface with the hydrogen produced by the cathode.

[0004] 2. MBR technology is a new technology that combines microbial reactors and membrane separation technology, replacing the secondary sedimentation tank of traditional biological treatment technology with membrane components. It mainly uses membrane separation equipment immersed in an aerobic biological pool to intercept the activated sludge and macromolecular organic matter in the tank, maintain a high concentration of microorganisms in the bioreactor, increase the organic load of biological treatment, and reduce the amount of residual sludge by maintaining a low sludge load. At the same time, nitrifying bacteria can fully reproduce in the system, and its nitrification effect is obvious, providing the possibility of deep phosphorus removal and nitrogen removal. Secondly, microporous membranes are used for filtration and separation, which can efficiently and stably filter microorganisms and suspended matter, etc., making the treated water purer and obtaining stable reclaimed water for direct use.

[0005] For example, the Chinese patent number CN116874124A is an electro-flocculation coupled gravity-driven water purification device and its use method, which provides an electro-flocculation process coupled with a gravity-driven ceramic membrane, removes phosphorus from sewage through the electro-flocculation process, and is connected to the gravity-driven ceramic membrane water treatment device through gravity to form a waterway. The generated flocs form a biofilm on the K1 filler to treat total phosphorus and ammonia nitrogen in sewage. However, in the above-mentioned device, the water body generated still contains harmful substances such as bacteria, fine impurities, heavy metals, viruses, etc. that are not good for the human body, and the treatment is not thorough, and the application scenarios need to be expanded.

[0006] Based on the above problems, the utility model proposes an integrated water treatment device of electrocoagulation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology to solve the problem that water still contains bacteria, fine impurities, heavy metals, viruses and other harmful substances after electrocoagulation and ceramic membrane filtration. Utility Model Content

[0007] In order to solve the above problems, the utility model proposes an integrated water treatment device of electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology. This structure can solve the problem that water still contains bacteria, fine impurities, heavy metals, viruses and other harmful substances after electroflocculation and ceramic membrane filtration.

[0008] In order to solve the above problems, the technical solution of the utility model is as follows:

[0009] The utility model discloses an electric flocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device, comprising: a submersible pump, an adjustable direct current regulated power supply, an electric flocculation tank, a slow flow tank, a vertical gravity-driven ceramic membrane bioreactor, a water reservoir, an RO pump, an RO membrane, and a clean water tank; the submersible pump is connected to the electric flocculation tank, the slow flow tank, the vertical gravity-driven ceramic membrane bioreactor, and the water reservoir in sequence through a pipeline, the adjustable direct current regulated power supply is connected to the internal electrodes of the electric flocculation tank, the RO pump is connected to the RO membrane with the water reservoir through a pipeline, and the RO membrane is connected to the clean water tank through a pipeline; the utility model is characterized in that: the RO membrane is provided with two water outlets, one water outlet is connected to the clean water tank through a pipeline, and the other water outlet is connected to the electric flocculation tank through a pipeline.

[0010] Furthermore, the electro-flocculation cell comprises an electro-flocculation reaction cell, a positive electrode sheet with holes, a negative electrode sheet with holes, an electrode sheet slot area, and a plurality of vertical shaft partitions; an electrode sheet slot area is provided in the electro-flocculation reaction cell, the positive electrode sheet with holes and the negative electrode sheet with holes are installed on the electrode sheet slot area, the positive electrode sheet with holes and the negative electrode sheet with holes are respectively connected to the positive and negative electrodes of an adjustable DC regulated power supply, and the plurality of vertical shaft partitions form a serpentine route in the electro-flocculation reaction cell.

[0011] Furthermore, the electro-flocculation reaction tank is also provided with an electro-flocculation tank water inlet and an electro-flocculation tank water outlet; the electro-flocculation tank water inlet is connected to a submersible pump through a pipeline, and the electro-flocculation tank water outlet is connected to a slow flow tank through a pipeline.

[0012] Furthermore, a bottom fixing bracket is provided at the bottom of the electro-flocculation reaction tank.

[0013] Furthermore, the vertical gravity-driven ceramic membrane bioreactor includes a float valve water tank, a water tank water inlet, a connecting port, a ceramic membrane water outlet, a sewage outlet, a vertical ceramic membrane reaction tank, a ceramic membrane, and a ceramic membrane reaction tank water outlet; the float valve water tank is connected to the vertical ceramic membrane reaction tank through the connecting port, the water tank water inlet is arranged on the top of the float valve water tank, the ceramic membrane is installed in the vertical ceramic membrane reaction tank, the ceramic membrane water outlet is arranged on the top of the ceramic membrane, the sewage outlet is arranged at the bottom of the vertical ceramic membrane reaction tank, the ceramic membrane reaction tank water outlet is arranged on the side of the vertical ceramic membrane reaction tank, the ceramic membrane water outlet is connected to the ceramic membrane reaction tank water outlet through a pipe, and the other end of the ceramic membrane reaction tank water outlet is connected to the water storage tank through a pipe.

[0014] Furthermore, a float valve is also provided in the vertical gravity-driven ceramic membrane bioreactor, one end of the float valve is connected to the water inlet of the water tank, and the other end is connected to the float valve water tank.

[0015] Furthermore, the RO membrane includes a mold shell, a central water collecting pipe water inlet end, a central water collecting pipe water outlet end, a RO membrane water inlet, a RO membrane water outlet, a sealing rubber ring, and a drain; the central water collecting pipe water inlet end and the central water collecting pipe water outlet end are arranged at both ends inside the mold shell, the central water collecting pipe water inlet end is connected to the RO pump, the central water collecting pipe water outlet end is connected to the clear water tank through a pipeline, the RO membrane water inlet end is arranged at the central water collecting pipe water inlet end, the RO membrane water outlet end is arranged at the central water collecting pipe water outlet end, a sealing rubber ring is provided at the central water collecting pipe water inlet end, and the drain outlet is arranged at the top of the mold shell at the central water collecting pipe water outlet end, and is connected to the electric flocculation tank through a pipeline.

[0016] Furthermore, a pressure gauge is provided between the water outlet of the RO pump and the water inlet of the central water collecting pipe, and a pipeline leading to the water reservoir is provided between the pressure gauge and the RO pump, and a return valve is provided on the pipeline.

[0017] Furthermore, a raw water rotor flowmeter, a raw water check valve and a raw water inlet valve are sequentially arranged on the pipeline between the submersible pump and the electric flocculation tank, and the drain outlet is connected between the electric flocculation tank and the raw water inlet valve through a pipeline.

[0018] The raw water is pretreated by the electro-flocculation tank, and then flows into the vertical gravity-driven ceramic membrane bioreactor by gravity for membrane filtration. The filtered water flows into the reservoir by gravity to wait for the RO process call; the RO pump pressurizes the water in the reservoir that has been pretreated by the vertical gravity-driven ceramic membrane bioreactor and transports it to the RO membrane for membrane filtration, and the effluent flows into the clear water tank for storage.

[0019] The utility model is divided into four layers of equipment. From top to bottom, the first layer is an adjustable DC voltage-stabilized power supply; the second layer is an electric flocculation tank and a slow-flow tank; the third layer is a vertical gravity-driven ceramic membrane bioreactor and a raw water collection tank; the fourth layer is a water reservoir, an RO pump, and an RO membrane. Placing the vertical gravity-driven ceramic membrane bioreactor on the third layer can use the water's own gravitational potential energy to provide the water with the kinetic energy required for flow, and then filter it into the water reservoir on the fourth layer; the water output and water inflow of the electric flocculation tank, the vertical gravity-driven ceramic membrane bioreactor, and the RO membrane are different, as shown in the following: the electric flocculation tank is larger than the vertical gravity-driven ceramic membrane bioreactor, which is larger than the RO membrane. Therefore, a slow-flow tank and a water reservoir are added in the middle of each process, which effectively solves the problem of different water outputs between the processes, and the water reservoir also provides a storage location for the RO return water.

[0020] The process of treating various water bodies by the utility model is as follows:

[0021] The submersible pump is turned on, and the raw water in the raw water collection tank enters the submersible pump. The raw water is pressurized from the outlet of the submersible pump through the connecting pipe to the electric flocculation tank. Its flow rate can be controlled by the valve and the rotor flowmeter. At the same time, in order to prevent the high-pressure water from flowing back, a raw water stop valve is set at one end of the connecting pipe near the water inlet at the bottom of the electric flocculation tank. The water flows into the water inlet at the bottom of the electric flocculation tank, and is pre-treated by electric flocculation. Some pollutants become colloids and are separated from the water body, which improves the quality of the effluent water, reduces the damage of the raw water to the ceramic membrane, and increases the life of the ceramic membrane.

[0022] Relying on the effect of gravitational potential energy, the water pre-treated by the electro-flocculation tank is stored in the slow-flow tank through the connecting pipe;

[0023] Water containing flocs produced after electro-flocculation treatment is pressed into the float valve under the action of gravity, and then enters the vertical gravity-driven ceramic membrane bioreactor. The flocs in the water can capture a large number of microorganisms. When the water level in the vertical gravity-driven ceramic membrane bioreactor reaches a certain height, the float valve will automatically close the water inlet to prevent the water level from being too high. When the ceramic membrane is used to treat water, the ceramic membrane is placed vertically, which can effectively prevent large particles of flocs from blocking the membrane pores, which is conducive to later cleaning. Small particles of flocs can still adhere to the membrane surface, accelerating the rapid growth of microorganisms on the membrane surface to form a biofilm; the gaps in the vertical ceramic membrane reaction tank are filled with fluidized bed fillers as active carriers, so that microorganisms adhere to the surface of the fillers, accelerating the cultivation of nitrifying bacteria and other microorganisms. When the growth of microorganisms and the accumulation of pollutants on the membrane surface reach a stable balance, the membrane flux will no longer decrease and remain at a certain value. The continuous movement of the fluidized bed fillers in the water also greatly improves the mass transfer efficiency of organic pollutants and enhances the treatment effect of the influent. The vertical placement of the ceramic membrane also increases the effective head at the outlet of the membrane pool, maximizing the water outlet efficiency.

[0024] The outlet of the ceramic membrane reaction tank introduces water into the water reservoir through a connecting pipe. When the water level of the water reservoir reaches a certain height, the RO pump can be started to carry out RO process treatment. There are two RO membrane outlets, one is the clean water outlet, and its water can meet the practical needs of various water appliances in daily life; the water flowing out of the other outlet is the wastewater generated during the reverse osmosis desalination process. Due to its high concentration of salt, it can be used to return the concentrated water to the electric flocculation tank, reducing waste, improving the conductivity during the electric flocculation process, reducing the consumption of electricity, and increasing the total water output.

[0025] Compared with the prior art, the advantages and positive effects of the utility model are:

[0026] 1. The utility model proposes an integrated water treatment device of electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology. Through the combination of double membrane technology and electrochemical treatment technology, electroflocculation is coupled with ceramic membrane-RO membrane for tertiary treatment, so as to obtain high-quality effluent for reuse. Electroflocculation is used as a pretreatment process of ceramic membrane to mainly remove some organic matter and trace pollutants. The ceramic membrane has the antioxidant properties to treat the water after electroflocculation, further remove organic matter, and reduce the pollution of subsequent RO membrane. The construction of the integrated double membrane system equipment is convenient for the integration of application devices, and is convenient for promotion and use.

[0027] 2. The application of this utility model in the prevention and treatment of water pollution has important advantages such as high efficiency, mild operating conditions, easy automation and versatility, and is known as an "environmentally friendly" process. In the application of reclaimed water reuse, electro-oxidation as a pretreatment stage improves the anti-pollution performance of the membrane surface on the one hand, and on the other hand, prolongs the service life of the ceramic membrane bioreactor and reduces the cleaning cost in terms of economic benefits.

[0028] 3. The utility model utilizes the construction of an electro-flocculation coupled gravity ceramic membrane system, combined with gravitational potential energy as a driving force, and has the characteristic of saving energy. The water pre-treated by electro-flocculation then flows into the gravity potential ceramic filter membrane pool to effectively improve membrane pollution and increase water production rate. At the same time, it can also increase the growth rate of microorganisms on the surface of the membrane component, thereby enhancing the water purification efficiency.

[0029] 4. The utility model effectively utilizes the space operation mode, the integrated system is easy to operate, the operation and management are convenient, the space utilization rate is high, and the water quality of the surface water purification and reuse effluent can be greatly improved, solving the problem that the surface water reuse effluent may still have an impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the operating system of an electric flocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device of the utility model;

[0031] Figure 2 It is a schematic diagram of the structure of the electric flocculation tank of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of a vertical gravity-driven ceramic membrane bioreactor of the utility model;

[0033] Figure 4 It is a schematic diagram of the reverse osmosis membrane structure of the utility model;

[0034] Figure 5 This is a schematic diagram of the installation position of an integrated water treatment device of an electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology of the utility model.

[0035] Legend:

[0036] 1. Submersible pump; 2. Raw water collection tank; 3. Raw water rotor flowmeter; 4. Raw water check valve; 5. Raw water inlet valve; 6. Adjustable DC regulated power supply; 7. Electric flocculation tank; 7-1. Electric flocculation reaction tank; 7-2. Positive electrode sheet with holes; 7-3. Negative electrode sheet with holes; 7-4. Electrode sheet slot area; 7-5. First shaft partition; 7-6. Second shaft partition; 7-7. Third shaft partition; 7-8. Fourth shaft partition; 7-9. Electric flocculation tank inlet; 7-10. Electric flocculation tank outlet; 7-11. Bottom fixed bracket; 8. Slow flow tank inlet valve; 9. Slow flow tank; 10. Slow flow tank outlet valve; 11. Float valve; 12. Vertical gravity-driven ceramic membrane bioreactor; 12-1. Float valve water tank; 12-2. Water tank inlet ; 12-3, connecting port; 12-4, ceramic membrane water outlet; 12-5, sewage outlet; 12-6, vertical ceramic membrane reaction tank; 12-7, ceramic membrane; 12-8, ceramic membrane reaction tank outlet; 13, sewage valve; 14, ceramic membrane outlet valve; 15, water reservoir; 16, water reservoir outlet valve; 17, RO pump; 18, return valve; 19, pressure gauge; 20, RO membrane; 20-1, mold shell; 20-2, central water collecting pipe water inlet; 20-3, central water collecting pipe water outlet; 20-4, RO membrane water inlet; 20-5, RO membrane water outlet; 20-6, sealing rubber ring; 20-7, drain outlet; 21, RO membrane rotor flowmeter; 22, RO membrane outlet valve; 23, clear water tank; 24, concentrate water rotor flowmeter; 25, concentrate water valve. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0039] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings: Example 1

[0040] like Figure 1 , Figure 2 As shown:

[0041] An integrated water treatment device of electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology comprises a submersible pump 1, a raw water collecting tank 2, a raw water rotor flowmeter 3, a raw water check valve 4, a raw water inlet valve 5, an adjustable DC voltage-stabilized power supply 6, an electroflocculation tank 7, a slow flow tank inlet valve 8, and a slow flow tank 9; the submersible pump 1 is placed in the raw water collecting tank 2, the raw water collecting tank 2 and the electroflocculation tank 7 are connected by a pipeline, the raw water rotor flowmeter 3, the raw water check valve 4, and the raw water inlet valve 5 are sequentially installed on the water delivery pipeline between the submersible pump 1 and the electroflocculation tank 7, the adjustable DC voltage-stabilized power supply 6 is connected to the internal circuit of the electroflocculation tank 7, the electroflocculation tank 7 and the slow flow tank 9 are connected by a pipeline, and the slow flow tank inlet valve 8 is installed on the pipeline between the electroflocculation tank 7 and the slow flow tank 9.

[0042] The submersible pump 1 is used to extract raw water from the raw water collection pool 2 and transport it to the electric flocculation pool 7 through a pipeline. The raw water collection pool 2 is used to collect raw water that needs to be purified. The raw water rotor flowmeter 3 and the raw water inlet valve 5 are used to control the flow rate of raw water in the pipeline. The raw water check valve 4 is used to prevent the backflow of high-pressure water. The adjustable DC regulated power supply 6 is used to provide power in the electric flocculation pool 7 and control the current. The electric flocculation pool 7 is used to perform electric flocculation treatment on the raw water. Some pollutants become colloids and are separated from the water body to improve the water quality of the effluent. The slow flow pool inlet valve 8 is used to control the opening and closing of the pipeline between the slow flow pool 9 and the electric flocculation pool 7. The slow flow pool 9 is used to receive the water that has been treated in the electric flocculation pool 7.

[0043] like Figure 2 As shown, in this embodiment, the electric flocculation tank 7 includes an electric flocculation reaction tank 7-1, a positive electrode sheet with holes 7-2, a negative electrode sheet with holes 7-3, an electrode sheet slot area 7-4, a first shaft partition 7-5, a second shaft partition 7-6, a third shaft partition 7-7, a fourth shaft partition 7-8, an electric flocculation tank water inlet 7-9, an electric flocculation tank water outlet 7-10, and a bottom fixed bracket 7-11; the electric flocculation reaction tank 7-1 is provided with an electrode sheet slot area 7-4, a positive electrode sheet with holes 7-2, a negative electrode sheet with holes 7-3 Installed on the electrode sheet slot area 7-4, the first vertical shaft partition 7-5, the second vertical shaft partition 7-6, the third vertical shaft partition 7-7, and the fourth vertical shaft partition 7-8 are installed in the electric flocculation reaction tank 7-1 in sequence, and the four vertical shaft partitions form a serpentine route. An electric flocculation tank water inlet 7-9 is provided at the bottom of the electric flocculation reaction tank 7-1 close to the electrode, and an electric flocculation tank water outlet 7-10 is provided at the top of the electric flocculation reaction tank 7-1 close to the fourth vertical shaft partition 7-8. A bottom fixed bracket 7-11 is also provided at the bottom of the electric flocculation reaction tank 7-1.

[0044] The electro-flocculation reaction tank 7-1 is used to collect the water to be treated. The positive electrode sheet with holes 7-2 and the negative electrode sheet with holes 7-3 are used to connect the adjustable DC voltage-stabilized power supply 6 to perform electro-flocculation reaction on the water. The electrode sheet slot area 7-4 is used to fix the positive electrode sheet with holes 7-2 and the negative electrode sheet with holes 7-3. The first vertical shaft partition 7-5, the second vertical shaft partition 7-6, the third vertical shaft partition 7-7 and the fourth vertical shaft partition 7-8 are arranged in a serpentine route to give the water enough time for electro-flocculation reaction. The water to be treated enters the electro-flocculation reaction tank 7-1 through the electro-flocculation tank water inlet 7-9. After the electro-flocculation reaction is completed, the water flows out of the electro-flocculation reaction tank 7-1 through the electro-flocculation tank water outlet 7-10 and is delivered to the slow flow tank 9 through a pipeline.

[0045] The specific working process of this embodiment is as follows: the submersible pump 1 starts the raw water in the raw water collection tank 2 to enter the submersible pump 1, and the raw water is pressurized from the outlet of the submersible pump 1 through the connecting pipe to the electric flocculation reaction tank 7-1. At the same time, the raw water rotor flowmeter 3 and the raw water inlet valve 5 control the raw water flow in the pipeline, and the raw water check valve 4 prevents the high-pressure water from flowing back. After the raw water enters the bottom of the electric flocculation reaction tank 7-1 through the water inlet 7-9 of the electric flocculation tank, the adjustable DC regulated power supply 6 starts to supply power to the positive electrode sheet 7-2 with holes and the negative electrode sheet 7-3 with holes. The electrode sheet 7-3 supplies power, and the water level rises while the water body undergoes an electric flocculation reaction in the electric flocculation reaction tank 7-1, and reaches the opening of the first vertical shaft partition 7-5. After flowing through the serpentine route formed by the four partitions in sequence, it flows out of the electric flocculation reaction tank 7-1 through the electric flocculation tank outlet 7-10. The water body after flowing out is treated by the electric flocculation reaction, and some pollutants become colloids and are separated from the water body, thereby improving the water quality of the effluent; the water after treatment relying on the action of gravitational potential energy enters the slow flow tank 9 through the slow flow tank inlet valve 8. Example 2

[0046] like Figure 1 , Figure 3 As shown:

[0047] In this embodiment, the difference from Embodiment 1 is that: a slow flow pool outlet valve 10, a float valve 11, a vertical gravity-driven ceramic membrane bioreactor 12, a drain valve 13, a ceramic membrane outlet valve 14, and a water reservoir 15 are also provided. The vertical gravity-driven ceramic membrane bioreactor 12 is connected to the slow flow pool 9 through a pipeline. The slow flow pool outlet valve 10 is arranged on the pipeline connecting the vertical gravity-driven ceramic membrane bioreactor 12 and the slow flow pool 9. The float valve 11 is arranged on the top of the vertical gravity-driven ceramic membrane bioreactor 12. A drain valve 13 is arranged at the bottom of the vertical gravity-driven ceramic membrane bioreactor 12. The vertical gravity-driven ceramic membrane bioreactor 12 is connected to the water reservoir 15 through a pipeline. The ceramic membrane outlet valve 14 is arranged on the pipeline between the vertical gravity-driven ceramic membrane bioreactor 12 and the water reservoir 15.

[0048] The slow flow pool outlet valve 10 is used to control the opening and closing of the pipeline between the slow flow pool 9 and the vertical gravity-driven ceramic membrane bioreactor 12. The float valve 11 controls the water body to enter the vertical gravity-driven ceramic membrane bioreactor 12 through buoyancy. The vertical gravity-driven ceramic membrane bioreactor 12 uses gravity to purify the water body through the ceramic membrane. The sewage generated by the vertical gravity-driven ceramic membrane bioreactor 12 is discharged through the sewage valve 13. The ceramic membrane outlet valve 14 is used to control the opening and closing of the pipeline between the vertical gravity-driven ceramic membrane bioreactor 12 and the water reservoir 15. The water reservoir 15 is used to collect water purified by the vertical gravity-driven ceramic membrane bioreactor 12.

[0049] like Figure 3 As shown, in this embodiment, the vertical gravity-driven ceramic membrane bioreactor 12 includes a float valve water tank 12-1, a water tank water inlet 12-2, a connecting port 12-3, a ceramic membrane water outlet 12-4, a sewage outlet 12-5, a vertical ceramic membrane reaction tank 12-6, a ceramic membrane 12-7, and a ceramic membrane reaction tank water outlet 12-8; the float valve water tank 12-1 is connected to the vertical ceramic membrane reaction tank 12-6 through the connecting port 12-3, and the water tank water inlet 12-2 is arranged on the top of the float valve water tank 12-1 A ceramic membrane 12-7 is installed in a vertical ceramic membrane reaction tank 12-6, a ceramic membrane water outlet 12-4 is arranged at the top of the ceramic membrane 12-7, a sewage outlet 12-5 is arranged at the bottom of the vertical ceramic membrane reaction tank 12-6, a ceramic membrane reaction tank water outlet 12-8 is arranged on the side of the vertical ceramic membrane reaction tank 12-6, the ceramic membrane water outlet 12-4 is connected to the ceramic membrane reaction tank water outlet 12-8 by a pipe, and the other end of the ceramic membrane reaction tank water outlet 12-8 is connected to the water storage tank 15 by a pipe.

[0050] The water inlet 12-2 of the water tank is connected to the slow flow pool 9 through a pipeline, and the drain valve 13 is connected to the drain outlet 12-5. The drain valve 13 controls the opening and closing of the drain outlet 12-5. The interior of the ceramic membrane 12-7 is a cavity, and the cavity is connected to the ceramic membrane outlet 12-4. Gravity is used for filtration and water is pressed to the ceramic membrane reaction pool outlet 12-8, thereby flowing into the water reservoir 15.

[0051] In the water body pre-treated by electrocoagulation in Example 1, some pollutants are separated from the water body as colloids, thereby improving the quality of effluent water, reducing the damage of raw water to the ceramic membrane 12-7, and increasing the life of the ceramic membrane 12-7.

[0052] When the ceramic membrane 12-7 is used to treat water, the ceramic membrane 12-7 is placed vertically, which can effectively prevent large particles from blocking the membrane pores, which is conducive to later cleaning. Small particles can still adhere to the membrane surface, accelerating the rapid growth of microorganisms on the membrane surface to form a biofilm; the gaps in the vertical ceramic membrane reaction tank 12-6 are filled with fluidized bed fillers as active carriers, so that microorganisms can attach to the surface of the fillers, accelerating the cultivation of nitrifying bacteria and other microorganisms. When the growth of microorganisms and the accumulation of pollutants on the surface of the ceramic membrane 12-7 reach a stable balance, the membrane flux will no longer decrease and remain at a certain value. The continuous movement of the fluidized bed fillers in the water also greatly improves the mass transfer efficiency of organic pollutants and enhances the treatment effect on the influent. The vertical placement of the ceramic membrane 12-7 also increases the effective head at the outlet of the membrane pool, maximizing the water outlet efficiency.

[0053] The specific working process of this embodiment is as follows: the water body pretreated by Example 1 becomes water containing flocs produced after the electric flocculation treatment. Under the action of gravity, it is pressed into the float valve 11 through the water tank inlet 12-2 and enters the float valve water tank 12-1. Subsequently, it enters the vertical ceramic membrane reaction tank 12-6 through the connecting port 12-3. The water body is further purified by the ceramic membrane 12-7 arranged inside the vertical ceramic membrane reaction tank 12-6. The flocs in the water can capture and sweep a large number of microorganisms. The purified water enters the cavity in the middle of the ceramic membrane 12-7 through the gap between the ceramic membranes 12-7. As the water level rises, the purified water flows through the ceramic membrane outlet 12-4 and the ceramic membrane reaction tank outlet 12-8 into the water reservoir 15. Example 3

[0054] like Figure 5 As shown, the slow flow pool 9, the vertical gravity-driven ceramic membrane bioreactor 12, and the water storage tank 15 of this embodiment are arranged from top to bottom. Such arrangement facilitates the generation of gravity and realizes the smooth flow of water. The other components and connection relationships are the same as those of Example 2. Example 4

[0055] like Figure 1 , Figure 4 As shown, in this embodiment, the difference from Example 3 is that: a water reservoir outlet valve 16, an RO pump 17, a return valve 18, a pressure gauge 19, an RO membrane 20, an RO membrane rotor flowmeter 21, an RO membrane outlet valve 22, and a clean water tank 23 are also provided. The water reservoir 15 is connected to the RO membrane 20 through a pipeline, and the water reservoir outlet valve 16, the RO pump 17, and the pressure gauge 19 are sequentially provided on the pipeline. The return valve 18 is arranged on the pipeline connecting the water outlet end of the RO pump 17 with the water reservoir 15. The RO membrane 20 is connected to the clean water tank 23 through a pipeline, and the RO membrane rotor flowmeter 21 and the RO membrane outlet valve 22 are sequentially provided on the pipeline.

[0056] The water outlet valve 16 of the water reservoir is used to control the opening and closing of the pipeline between the water reservoir 15 and the RO membrane 20. The RO pump 17 is used to extract water in the water reservoir 15 into the RO membrane 20. The return valve 18 is used to regulate the flow of water entering the RO membrane 20 to achieve a better flushing effect. The pressure gauge 19 is used to observe the pressure of the water entering the RO membrane 20. The RO membrane 20 is used to further purify the water. The RO membrane rotor flowmeter 21 and the RO membrane outlet valve 22 are used for the RO membrane 20 to control the water outlet size. The clean water tank 23 is used to collect the purified water.

[0057] like Figure 4 As shown, in this embodiment, the RO membrane 20 includes a mold shell 20-1, a central water collecting pipe water inlet end 20-2, a central water collecting pipe water outlet end 20-3, a RO membrane water inlet 20-4, a RO membrane water outlet 20-5, a sealing rubber ring 20-6, and a drain port 20-7. The central water collecting pipe water inlet end 20-2 and the central water collecting pipe water outlet end 20-3 are arranged at both ends of the mold shell 20-1, the RO membrane water inlet 20-4 is arranged at the central water collecting pipe water inlet end 20-2, the RO membrane water outlet 20-5 is arranged at the central water collecting pipe water outlet end 20-3, and a sealing rubber ring 20-6 is also arranged at the central water collecting pipe water inlet end 20-2. The drain port 20-7 is arranged at the top of the mold shell 20-1 at the central water collecting pipe water outlet end 20-3.

[0058] The mold shell 20-1 is used to install other components and limit the direction of water flow. The water inlet end 20-2 of the central water collecting pipe is used for water flow to enter, and the water outlet end 20-3 of the central water collecting pipe is used to discharge the purified water into the clean water tank 23. The water inlet end 20-2 of the central water collecting pipe is provided with small holes. The RO membrane inlet 20-4 is used for membrane filtration, and the RO membrane outlet 20-5 is used for the discharge of concentrated water after membrane filtration. The sealing rubber ring 20-6 is used to prevent part of the concentrated water from being directly discharged from the outside of the membrane, and the drain port 20-7 is used to discharge the collected concentrated water out of the mold shell 20-1.

[0059] Furthermore, in this embodiment, a concentrate rotor flowmeter 24 and a concentrate valve 25 are also provided. The drain outlet 20-7 is connected to the pipeline between the raw water inlet valve 5 and the electric flocculation tank 7 through a pipeline. At the same time, a concentrate rotor flowmeter 24 and a concentrate valve 25 are provided in sequence between the drain outlet 20-7 and the electric flocculation tank 7 to control the concentrate flow rate in the pipeline. The water flowing out of the drain outlet 20-7 is the wastewater generated during the reverse osmosis desalination treatment process. Since it contains a high concentration of salt, the concentrate can be refluxed and re-transported to the electric flocculation tank 7 to reduce waste, improve the conductivity during the electric flocculation process, reduce the consumption of electric energy, and also increase the total water output.

[0060] The specific working process of this embodiment is as follows: the RO pump 17 is started, and the water in the water reservoir 15 is pressurized and transported to the water inlet end 20-2 of the central water collecting pipe through the water reservoir outlet valve 16. The water flows through the circular holes on the water inlet end 20-2 of the central water collecting pipe to the water inlet 20-4 of the RO membrane. The pure water after membrane filtration flows out from the water outlet end 20-3 of the central water collecting pipe and is stored in the clear water tank 23. The concentrated water after membrane filtration permeates from the water outlet 20-5 of the RO membrane and is collected in the membrane shell 20-1. It passes through the drain port 20-7 and in turn passes through the concentrated water rotor flowmeter 24 and the concentrated water valve 25 to enter the electric flocculation tank 7 for evolution and reuse.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An integrated water treatment device of electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology, comprising: A submersible pump (1), an adjustable DC voltage-regulated power supply (6), an electric flocculation tank (7), a slow-flow tank (9), a vertical gravity-driven ceramic membrane bioreactor (12), a water reservoir (15), an RO pump (17), an RO membrane (20), and a clean water tank (23); the submersible pump (1) is connected to the electric flocculation tank (7), the slow-flow tank (9), the vertical gravity-driven ceramic membrane bioreactor (12), and the water reservoir (15) in sequence through pipelines; the adjustable DC voltage-regulated power supply (6) is connected to the internal electrodes of the electric flocculation tank (7); the RO pump (17) connects the RO membrane (20) to the water reservoir (15) through pipelines; and the RO membrane (20) is connected to the clean water tank (23) through pipelines; the characteristic is that the RO membrane (20) is provided with two water outlets, one of which is connected to the clean water tank (23) through a pipeline, and the other is connected to the electric flocculation tank (7) through a pipeline.

2. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 1 is characterized by: The electro-flocculation tank (7) comprises an electro-flocculation reaction tank (7-1), a positive electrode sheet with holes (7-2), a negative electrode sheet with holes (7-3), an electrode sheet slot area (7-4), and a plurality of vertical shaft partitions; an electrode sheet slot area (7-4) is provided in the electro-flocculation reaction tank (7-1), the positive electrode sheet with holes (7-2) and the negative electrode sheet with holes (7-3) are installed on the electrode sheet slot area (7-4), the positive electrode sheet with holes (7-2) and the negative electrode sheet with holes (7-3) are respectively connected to the positive and negative electrodes of an adjustable DC voltage-stabilized power supply (6), and the plurality of vertical shaft partitions form a serpentine route in the electro-flocculation reaction tank (7-1).

3. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 2 is characterized by: The electro-flocculation reaction tank (7-1) is also provided with an electro-flocculation tank water inlet (7-9) and an electro-flocculation tank water outlet (7-10); the electro-flocculation tank water inlet (7-9) is connected to a submersible pump (1) via a pipeline, and the electro-flocculation tank water outlet (7-10) is connected to a slow-flow tank (9) via a pipeline.

4. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 3 is characterized by: A bottom fixing bracket (7-11) is also provided at the bottom of the electro-flocculation reaction tank (7-1).

5. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 1 is characterized by: The vertical gravity-driven ceramic membrane bioreactor (12) comprises a float valve water tank (12-1), a water tank water inlet (12-2), a connecting port (12-3), a ceramic membrane water outlet (12-4), a sewage outlet (12-5), a vertical ceramic membrane reaction pool (12-6), a ceramic membrane (12-7), and a ceramic membrane reaction pool water outlet (12-8); the float valve water tank (12-1) is connected to the vertical ceramic membrane reaction pool (12-6) via the connecting port (12-3), and the water tank water inlet (12-2) is arranged at the top of the float valve water tank (12-1). The ceramic membrane (12-7) is installed in a vertical ceramic membrane reaction tank (12-6), the ceramic membrane water outlet (12-4) is arranged at the top of the ceramic membrane (12-7), the sewage outlet (12-5) is arranged at the bottom of the vertical ceramic membrane reaction tank (12-6), the ceramic membrane reaction tank water outlet (12-8) is arranged on the side of the vertical ceramic membrane reaction tank (12-6), the ceramic membrane water outlet (12-4) and the ceramic membrane reaction tank water outlet (12-8) are connected by a pipeline, and the other end of the ceramic membrane reaction tank water outlet (12-8) is connected to a water storage tank (15) by a pipeline.

6. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 5 is characterized by: A float valve (11) is also provided in the vertical gravity-driven ceramic membrane bioreactor (12); one end of the float valve (11) is connected to the water tank water inlet (12-2), and the other end is connected to the float valve water tank (12-1).

7. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 1 is characterized by: The RO membrane (20) comprises a mold shell (20-1), a central water collecting pipe water inlet end (20-2), a central water collecting pipe water outlet end (20-3), an RO membrane water inlet (20-4), an RO membrane water outlet (20-5), a sealing rubber ring (20-6), and a drain port (20-7); the central water collecting pipe water inlet end (20-2) and the central water collecting pipe water outlet end (20-3) are arranged at two ends inside the mold shell (20-1); the central water collecting pipe water inlet end (20-2) is connected to an RO pump (17); the central water collecting pipe water outlet end (20-3) is connected to an RO pump (17); The water outlet end (20-3) of the water collecting pipe is connected to the clean water tank (23) through a pipeline, the RO membrane water inlet (20-4) is arranged at the water inlet end (20-2) of the central water collecting pipe, the RO membrane water outlet (20-5) is arranged at the water outlet end (20-3) of the central water collecting pipe, a sealing rubber ring (20-6) is provided at the water inlet end (20-2) of the central water collecting pipe, and the drain outlet (20-7) is arranged at the top of the mold shell (20-1) of the water outlet end (20-3) of the central water collecting pipe and is connected to the electric flocculation tank (7) through a pipeline.

8. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 7 is characterized by: A pressure gauge (19) is provided between the water outlet of the RO pump (17) and the water inlet end (20-2) of the central water collecting pipe, and a pipeline leading to the water reservoir (15) is provided between the pressure gauge (19) and the RO pump (17), and a return valve (18) is provided on the pipeline.

9. The electroflocculation-vertical gravity-driven ceramic membrane bioreactor-double membrane technology water treatment integrated device according to claim 7, characterized in that: A raw water rotor flow meter (3), a raw water check valve (4), and a raw water inlet valve (5) are sequentially arranged on the pipeline between the submersible pump (1) and the electric flocculation tank (7), and the drain port (20-7) is connected between the electric flocculation tank (7) and the raw water inlet valve (5) via a pipeline.

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