Integrated water purification device coupled with hollow fiber membrane filtration

Abstract

The invention discloses an integrated water purification device coupled with hollow fiber membrane filtration, and belongs to the technical field of water treatment. The problem that an existing water treatment device cannot flexibly treat high-quality water source water, multi-element polluted water source water and sudden polluted water source water is solved. A plurality of electrode plates are arranged in the upper space of the flare tube to form an upward flow electric flocculation chamber, a cover body is arranged outside the flare tube in a surrounding manner, the top end of the cover body is hermetically connected with the top of the tank body, the bottom end of the cover body is an open end, and a downward flow flocculation chamber is formed between the cover body and the flare tube; a membrane filtration chamber, an assembly cleaning device, a turbidity protection layer, a biological membrane honeycomb chamber and a sludge concentration chamber are sequentially arranged in the inner space of the tank body on the outer side of the cover body from top to bottom, and a sludge discharge assembly is connected to the outer side of the upper part of the sludge concentration chamber. A hollow fiber ultrafiltration membrane assembly or a hollow fiber nanofiltration membrane assembly can be adopted for water of different water sources, flocculation precipitation, a biological membrane and a turbidity protection layer are combined, operation modes are diversified, and multiple purposes of the water purification device are achieved.

Description

Technical Field

[0001] The invention relates to an integrated water purification device coupled with hollow fiber membrane filtration, belonging to the technical field of water treatment. Background Art

[0002] Drinking water sources in villages and towns often have sudden / multiple pollution problems such as excessive microorganisms, turbidity, iron and manganese, color, and organic matter. Even if some villages and towns have established some water treatment equipment / facilities, the treatment effect is poor and unstable, and the microbial compliance rate in the effluent is low; at the same time, the operation and maintenance of water treatment with existing technologies or equipment is heavy and requires specialized technicians for operation and management, and the consumption of chemicals is high, which brings huge operation and maintenance difficulties to the treatment of drinking water in villages and towns.

[0003] Hollow fiber membranes have been widely used in the field of water treatment due to their excellent water treatment performance and anti-pollution ability. However, the application of hollow fiber membrane ultrafiltration in decentralized water treatment in villages and towns follows the process design concept of centralized urban water plants. The operation process consumes a large amount of reagents and has high maintenance requirements, which makes it difficult to meet the demand for zero maintenance of water treatment facilities in villages and towns. In addition, hollow fiber nanofiltration membranes are currently emerging membrane types and membrane technologies. There is currently a lack of design and use methods for decentralized water treatment facilities. It is different from conventional rolled nanofiltration membrane elements. Rolled nanofiltration membranes have high requirements for influent water quality and usually need to undergo flocculation, sedimentation, and even filtration before entering the membrane pool. Therefore, the integrated low-maintenance treatment process with hollow fiber membrane filtration as the core has broad application potential in decentralized water supply scenarios. However, there is currently no data to support how to integrate hollow fiber ultrafiltration membrane technology and hollow fiber nanofiltration membrane technology into a low-maintenance integrated device. The development of an integrated, low-maintenance, multi-purpose hollow fiber membrane filtration water purification device can flexibly handle the treatment of high-quality water sources, multi-polluted water sources and suddenly polluted water sources, which is of great significance to the construction of water treatment facilities in villages and towns. Summary of the invention

[0004] The present invention aims to solve the above technical problems and further provides an integrated water purification device coupled with hollow fiber membrane filtration.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] An integrated water purification device coupled with hollow fiber membrane filtration comprises a tank body, a flocculant tank and an emergency tank, wherein a trumpet tube with an upward opening is vertically arranged inside the tank body, a nozzle is connected to the lower part of the trumpet tube, the inlet end of the nozzle is connected to a pipeline mixer, a raw water storage tank, a flocculant tank and an emergency tank are respectively connected to the water inlet end of the pipeline mixer through pipelines, a plurality of electrode plates are arranged in the upper space of the trumpet tube to form an upward current electroflocculation chamber, a cover body is arranged outside the trumpet tube, and the top end of the cover body is sealed and connected to the top of the tank body. The bottom end of the cover body is an open end, and a downward flow flocculation chamber is formed between the cover body and the trumpet pipe. The internal space of the pool body outside the cover body is arranged with a membrane filter chamber, a component cleaning device, a turbidity protection layer, a biofilm honeycomb chamber and a sludge concentration chamber from top to bottom. A mud discharge assembly is connected to the outer side of the upper part of the sludge concentration chamber, and the mud discharge assembly is connected to the nozzle through a mud return pipe. A number of hollow fiber membrane filter assemblies are arranged in the membrane filter chamber, and the lower part of the membrane filter chamber is connected to the sludge concentration chamber through a reflux pipeline. The top of each hollow fiber membrane filter assembly is connected to a water production pipe.

[0007] Furthermore, a pressure transmitter and a PLC control unit are provided on the water production pipe, and an automatic high-pressure exhaust valve is provided on the top of the pool body.

[0008] Furthermore, the biofilm honeycomb chamber is filled with a honeycomb porous medium, and microorganisms are attached to the honeycomb porous medium.

[0009] Furthermore, the turbidity protection layer includes a water purification sponge and a support frame for installing the water purification sponge.

[0010] Furthermore, the mud discharge assembly includes a mud discharge bucket, an automatic mud discharge device and a mud discharge main line. The mud discharge bucket is connected to the upper part of the mud concentration chamber, the automatic mud discharge device is arranged on the mud discharge main line, the mud return pipe is connected and arranged between the mud discharge main line and the nozzle, and the mud return pipe is provided with a first valve.

[0011] Furthermore, the component cleaning device comprises a cleaning water inlet main pipe and a plurality of cleaning branch pipes which are connected and fixed to each other, and the cleaning water inlet main pipe is provided with a cleaning water inlet valve and an air intake valve.

[0012] Furthermore, second valves are respectively provided on the water inlet pipe between the raw water storage tank and the pipeline mixer, on the flocculant dosing pipe between the flocculant tank and the pipeline mixer, and on the agent dosing pipe between the emergency agent tank and the pipeline mixer.

[0013] Furthermore, a vent pipe is connected to the bottom of the pool body.

[0014] Furthermore, a plurality of electrode plates are arranged at equal intervals.

[0015] Furthermore, the bottom of the cover body is a gradually closing structure.

[0016] Compared with the prior art, the present invention has the following effects:

[0017] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention can flexibly replace the type of hollow fiber membrane components. Hollow fiber ultrafiltration membrane components or hollow fiber nanofiltration membrane components can be used for different water sources. Combined with flocculation precipitation, biofilm, and turbidity protection layer, the operation mode is diversified to achieve multi-purpose water purification device.

[0018] The present invention discloses an integrated water purification device coupled with hollow fiber membrane filtration, which integrates the functions of oxidation, coagulation, enhanced flocculation, sedimentation and membrane filtration. It utilizes vacuum siphon, upward flow electroflocculation and downward flow flocculation to construct a circulating separation technology, thereby reducing the consumption of chemicals in processes such as oxidation and coagulation. It has a small footprint and a high level of automation, and is more suitable for decentralized small-scale water supply scenarios.

[0019] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention has significantly reduced flocculant dosage compared with conventional chemical agent flocculation; compared with conventional cyclone cone flocs, the particles formed in the downward flow flocculation chamber are larger and denser under the strengthening effect of the electrodes; compared with conventional electric flocculation technology, the integrated water purification device as a whole utilizes the siphon circulation separation method to improve the utilization rate of electrodes and agents, increase the floc particle size, and thus effectively improve the sedimentation effect of the sludge concentration chamber.

[0020] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention can be widely used in the treatment of drinking water with characteristic water sources such as micro-pollution, high algae, high hardness, iron and manganese pollution, and can also be used for deep sewage treatment, with various application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of an integrated water purification device coupled with hollow fiber membrane filtration according to the present invention;

[0022] Figure 2 for Figure 1 AA section view (not to scale);

[0023] Figure 3 for Figure 1 BB section diagram (not to scale);

[0024] Figure 4 for Figure 1 Schematic diagram of CC section view (not to scale).

[0025] In the figure:

[0026] 1. Tank body; 2. Flocculant tank; 3. Emergency agent tank; 4. Trumpet; 5. Nozzle; 6. Pipe mixer; 7. Upward flow electroflocculation chamber; 8. Cover; 9. Downward flow flocculation chamber; 10. Component cleaning device; 10-1. Cleaning water inlet main pipe; 10-2. Cleaning branch pipe; 11. Turbidity protection layer; 12. Biofilm honeycomb chamber; 13. Mud concentration chamber; 14. Mud return pipe; 15. Hollow fiber membrane filter assembly; 16. Water production pipe; 17. Pressure transmitter; 18. Automatic high-pressure exhaust valve; 19. Mud discharge bucket; 20. Automatic mud discharge device; 21. Mud discharge main line; 22. Vent pipe; 23. Return line. DETAILED DESCRIPTION

[0027] Combination Figures 1 to 4 The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that the descriptions of the present invention regarding directions such as "front", "back", "left", "right", "inside", "outside", "left side", "right side", "upper", "lower", "top", "bottom", etc. are all defined based on the relationship between the orientations or positions shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In the description of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Specific implementation method 1: Combination Figures 1 to 4The present embodiment is described as an integrated water purification device coupled with hollow fiber membrane filtration, comprising a tank body 1, a flocculant tank 2 and an emergency tank 3, wherein a trumpet tube 4 with an opening upward is vertically arranged inside the tank body 1, a nozzle 5 is connected to the lower part of the trumpet tube 4, the inlet end of the nozzle 5 is connected to a pipeline mixer 6, a raw water storage tank, a flocculant tank 2 and an emergency tank are respectively connected to the water inlet end of the pipeline mixer 6 through pipelines, a plurality of electrode plates are arranged in the upper space of the trumpet tube 4 to form an upward current electroflocculation chamber 7, a cover body 8 is provided around the outside of the trumpet tube 4, the top end of the cover body 8 is sealed and connected to the top of the tank body 1, and the cover body The bottom end of 8 is an open end, and a downward flow flocculation chamber 9 is formed between the cover body 8 and the trumpet tube 4. The internal space of the pool body 1 outside the cover body 8 is arranged with a membrane filter chamber, a component cleaning device 10, a turbidity protection layer 11, a biofilm honeycomb chamber 12 and a sludge concentration chamber 13 from top to bottom. A mud discharge assembly is connected to the outer side of the upper part of the sludge concentration chamber 13, and the mud discharge assembly is connected to the nozzle 5 through a mud return pipe 14. A number of hollow fiber membrane filter assemblies 15 are arranged in the membrane filter chamber, and the lower part of the membrane filter chamber is connected to the sludge concentration chamber 13 through a return pipe 23. The top of each hollow fiber membrane filter assembly 15 is connected to a water production pipe 16.

[0031] The fluid is the sewage to be treated, the lower part of the bell pipe 4 is the fluid inlet, and the upper part of the bell pipe 4 is the fluid outlet.

[0032] A processing space is formed inside the cell body 1.

[0033] The electrode plates are made of iron anode, rhodium iridium titanium anode, mirror titanium cathode and mirror stainless steel cathode in different proportions, respectively connected to DC power supply, constant current operation, and the current density is controlled at 50-200A / m 2 In order to achieve the flocculation process without or with low drug dosage, in addition, the current of the electro-flocculation is adjusted through the cathode polarization to produce a large amount of hydroxide to promote the softening of calcium and magnesium.

[0034] The downward flow flocculation chamber 9 utilizes the external electric field and micromagnetic field of the upward flow electroflocculation chamber 7 to further increase the particle size of flocs flowing out of the upward flow electroflocculation chamber 7 and improve the sedimentation effect of the sludge concentration chamber 13 .

[0035] The biofilm honeycomb chamber 12 uses a honeycomb porous medium, such as honeycomb activated carbon, honeycomb volcanic rock, honeycomb polypropylene, etc. Such a medium has a rough surface and a large specific surface area, can stably attach microorganisms, and the honeycomb pore size is 1-10 cm. Compared with conventional inclined tube / inclined plate sedimentation, it combines the shallow pool sedimentation theory and the biofilm degradation theory, and avoids clogging of the honeycomb chamber by adjusting the circulating separation flow rate and the membrane component cleaning device 10.

[0036] Each hollow fiber membrane module is arranged vertically.

[0037] The biofilm honeycomb chamber 12 is preferably arranged at the upper part of the sludge concentration chamber 13. Figure 1 shown.

[0038] The sludge concentration chamber 13 is a conical structure. The sludge settles in the sludge concentration chamber. When it reaches a certain height, it enters the sludge discharge assembly for automatic sludge discharge.

[0039] The turbidity protection layer 11 is used to further reduce the turbidity of the membrane filtration inlet water, thereby reducing membrane pollution. The turbidity protection layer 11 is mainly composed of a water purification adsorption sponge material and a support layer.

[0040] The component cleaning device 10 can be used to flush the hollow fiber membrane filter component 15 and rinse the turbidity protection layer 11 at the same time. The flushing water of the hollow fiber membrane filter component 15 flows back to the sludge concentration chamber 13 through the reflux pipe 23; the flushing water of the turbidity protection layer 11 directly enters the biofilm honeycomb chamber 12, flushes the large particles of impurities on the surface of the biofilm, and enters the sludge concentration chamber 13, so that the pollutants in the hollow fiber membrane filter component 15 and the turbidity protection layer 11 enter the sludge discharge component through the sludge concentration chamber 13 and are discharged from the tank body 1.

[0041] When the amount of sludge in the sludge concentration chamber 13 is too much, a part of the sludge is discharged by setting a sludge discharge assembly.

[0042] When the hollow fiber membrane filter assembly 15 in the membrane filter chamber adopts an ultrafiltration membrane assembly, the cleaning process is air washing-air-water washing-water washing. When a nanofiltration membrane assembly is adopted, only hydraulic enhanced cleaning is performed during cleaning.

[0043] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention can be used for water treatment under conventional water inlet conditions, and can also be used for water treatment under conditions where the concentration of inlet pollutants exceeds the standard. Conventional water inlet conditions are that the concentration of new pollutants does not exceed the standard and the turbidity is less than 50 NTU, and other conditions are all unconventional water inlet conditions.

[0044] When used for water treatment under conventional raw water inlet conditions, the operation process is as follows: when the water to be treated enters from the water inlet pipe set at the bottom, the flocculant is added to the inlet water through the flocculant addition pipe through the metering pump, and after being evenly mixed by the pipeline mixer 6, it is first sprayed into the bell pipe 4 at high speed through the nozzle 5. Based on the siphon principle, a vacuum is formed near the bell mouth at the lower part of the bell pipe 4 to suck the return mud in the mud return pipe 14. The inlet water and the return mud are violently mixed in the bell pipe 4, and enter the upward flow electroflocculation chamber 7 and the downward flow flocculation chamber 9 in turn. Under the auxiliary action of the electrodes in the upward flow electroflocculation chamber 7, the inlet water is assisted to flocculate and soften. The mud-water mixture flowing out of the downward flow flocculation chamber 9 is separated from mud and water in the mud concentration chamber 13 and the biofilm honeycomb chamber 12, and the clean water enters the submerged hollow fiber membrane filter assembly 15 upward. After being filtered by the submerged hollow fiber membrane filter assembly 15, the effluent enters the water production pipe 16, and part of the mud enters the mud discharge assembly.

[0045] When used for water treatment under the condition of excessive pollutant concentration in the influent, the operation process is as follows: when the water to be treated enters from the inlet pipe set at the bottom, the flocculant is added to the influent through the flocculant addition pipe through the metering pump, and the oxidant in the emergency agent tank 3 is added to the influent through the emergency agent addition pipe through the metering pump. After the raw water, flocculant and oxidant are evenly mixed by the pipeline mixer 6, they are first sprayed into the trumpet pipe 4 at high speed through the nozzle 5. Based on the siphon principle, a vacuum is formed near the bell mouth at the bottom of the trumpet pipe 4. The air sucks the return mud in the mud return pipe 14, and the incoming water and the return mud are mixed violently in the trumpet pipe 4, and enter the upward flow electroflocculation chamber 7 and the downward flow flocculation chamber 9 in turn. The mud-water mixture flowing out of the downward flow flocculation chamber 9 is separated into mud and water in the mud concentration chamber 13 and the biofilm honeycomb chamber 12, and the clean water goes up through the turbidity protection layer 11 and enters the submerged hollow fiber membrane filter assembly 15. After being filtered by the submerged hollow fiber membrane filter assembly 15, the effluent enters the water production pipe 16, and the mud partially enters the mud discharge assembly. Part of the active mud in the mud discharge assembly flows back to the tank body 1, ensuring that the active substances used to remove pollutants in the tank body 1 are at a certain concentration, thereby achieving the removal of pollutants. In addition, under the condition of adding emergency oxidants (ferrate, permanganate, etc.), the electrode plates in the upward flow electroflocculation chamber 7 can reduce the energy barrier and improve the oxidation efficiency. The vacuum siphon effect can circulate the unused oxidants in the sludge concentration chamber 13 into the upward flow electroflocculation chamber 7, thereby improving the utilization rate of the oxidants. The oxidation products can also play a catalytic role, forming a catalytic oxidation process under the action of the electrode plates. Compared with conventional electroflocculation technology, the utilization rate of electrodes and reagents is improved.

[0046] In scenarios where influent pollutants exceed the standard, there may be influent water quality problems such as excessive turbidity, iron and manganese, micropollutants, algae, salinity, etc. According to the application scenario, emergency agents can select common water emergency agents such as coagulants, oxidants, adsorbents, softeners, etc.

[0047] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention can flexibly replace the type of hollow fiber membrane components. Hollow fiber ultrafiltration membrane components or hollow fiber nanofiltration membrane components can be used for different water sources. Combined with flocculation precipitation, biofilm, and turbidity protection layer 11, the operation mode is diversified to achieve multi-purpose water purification device.

[0048] The present invention discloses an integrated water purification device coupled with hollow fiber membrane filtration, which integrates the functions of oxidation, coagulation, enhanced flocculation, sedimentation and membrane filtration. It utilizes vacuum siphon, upward flow electroflocculation and downward flow flocculation to construct a circulating separation technology, thereby reducing the consumption of chemicals in processes such as oxidation and coagulation. It has a small footprint and a high level of automation, and is more suitable for decentralized small-scale water supply scenarios.

[0049] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention has significantly reduced flocculant dosage compared with conventional chemical flocculation; compared with conventional cyclone cone flocs, the particles formed in the downward flow flocculation chamber 9 are larger and denser under the strengthening effect of the electrodes; compared with conventional electric flocculation technology, the integrated water purification device as a whole utilizes the siphon circulation separation method to improve the utilization rate of electrodes and reagents and increase the floc particle size, thereby effectively improving the sedimentation effect of the sludge concentration chamber 13.

[0050] The integrated water purification device coupled with hollow fiber membrane filtration of the present invention can be widely used in the treatment of drinking water with characteristic water sources such as micro-pollution, high algae, high hardness, iron and manganese pollution, and can also be used for deep sewage treatment, with various application scenarios.

[0051] The water production pipe 16 is provided with a pressure transmitter 17 and a PLC control unit, and the top of the tank body 1 is provided with an automatic high-pressure exhaust valve 18. With such a design, the pressure transmitter 17 and the automatic high-pressure exhaust valve 18 provided at the top of the tank body 1 automatically control the transmembrane pressure difference of the hollow fiber membrane filter assembly 15. When an ultrafiltration membrane assembly is used, the transmembrane pressure difference is controlled at 40-100 cmH2O, and when a nanofiltration membrane assembly is used, the transmembrane pressure difference is controlled at 3000-5000 cmH2O.

[0052] The biofilm honeycomb chamber 12 is filled with a honeycomb porous medium, and microorganisms are attached to the honeycomb porous medium. The biofilm honeycomb chamber 12 uses a honeycomb porous medium, combines shallow pond sedimentation theory and biofilm degradation theory, and effectively achieves mud-water separation and further degradation and removal of micropollutants.

[0053] The turbidity protection layer 11 includes a clean water adsorption sponge and a support frame for installing the clean water adsorption sponge.

[0054] The mud discharge assembly includes a mud discharge bucket 19, an automatic mud discharge device 20 and a mud discharge main line 21. The mud discharge bucket 19 is connected to the upper part of the mud residue concentration chamber 13. The automatic mud discharge device 20 is arranged on the mud discharge main line 21. The mud return pipe 14 is connected and arranged between the mud discharge main line 21 and the nozzle 5. The mud return pipe 14 is provided with a first valve. In this design, the sludge settled in the mud discharge bucket 19 is discharged out of the tank body 1 by setting the mud discharge main line 21. Through the mud return pipe 14 and the first valve thereon, the sludge in the mud discharge bucket 19 is controlled to return to the mud residue concentration chamber 13, ensuring that the active substances used to remove pollutants in the tank body 1 are at a certain concentration, thereby achieving the removal of pollutants. The automatic mud discharge device 20 automatically collects the mud residue turbidity index in the mud discharge bucket 19 and implements fully automatic mud discharge control to ensure that the active mud residue in the device maintains a certain concentration, forms a good hydraulic cycle, and ensures the water quality of the effluent.

[0055] The component cleaning device 10 includes a cleaning water inlet main pipe 10-1 and a plurality of cleaning branch pipes 10-2 that are connected and fixed. The cleaning water inlet main pipe 10-1 is provided with a cleaning water inlet valve and an air intake valve. With such a design, cleaning water enters from the cleaning water inlet main pipe 10-1 and is discharged from the plurality of cleaning branch pipes 10-2. The number of cleaning water inlet main pipes 10-1 can be multiple and evenly arranged. The plurality of cleaning branch pipes 10-2 are preferably evenly arranged so that the cleaning effect on the upper hollow fiber membrane filter assembly 15 and the lower biomembrane honeycomb chamber 12 is more uniform.

[0056] Second valves are respectively provided on the water inlet pipe between the raw water storage tank and the pipeline mixer 6, on the flocculant dosing pipe between the flocculant tank 2 and the pipeline mixer 6, and on the emergency agent dosing pipe between the emergency agent tank 3 and the pipeline mixer 6. In this design, by providing the second valves on the raw water inlet pipe, the flocculant dosing pipe and the agent dosing pipe, the control of raw water inlet, flocculant and emergency agent is realized.

[0057] A vent pipe 22 is connected to the bottom of the tank body 1. This design is used to vent the medium in the tank body 1 during emergency and maintenance. A vent valve is provided on the vent pipe 22. The automatic high-pressure exhaust valve 18 on the top of the tank body 1 is convenient for exhausting air. The number of vent pipes 22 is 2 to 4, and the number of automatic high-pressure exhaust valves 18 is 6 to 10.

[0058] Several electrode plates are arranged at equal distances.

[0059] The bottom of the cover body 8 is a gradually closing structure. Such a design can effectively increase the outlet flow rate through the gradually closing structure.

[0060] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described. An integrated water purification device coupled with hollow fiber membrane filtration using ultrafiltration technology is used to treat water of conventional water quality source water, and the water treatment operation process under conventional raw water inlet conditions is referred to. The hollow fiber membrane filter assembly is a vertically arranged ultrafiltration membrane assembly. The transmembrane pressure difference of the ultrafiltration membrane assembly is automatically controlled by a pressure transmitter and an automatic high-pressure exhaust valve, and the transmembrane pressure difference is controlled at 40-60cm. The cleaning process is air washing-air-water washing-water washing. Specifically, the air inlet valve on the pipeline of the component cleaning device is opened, and air enters the cleaning water inlet main pipe and several cleaning branches. The cleaning water inlet main pipe and the cleaning branch are both provided with filter heads. Air is sprayed out from the filter head on the pipeline, and the impurities on the hollow fiber membrane filter assembly are scrubbed down and suspended in the water. The air inlet valve is closed, and the cleaning water inlet valve and the reflux valve on the reflux pipeline are opened. The cleaning water flows back to the sludge concentration chamber through the reflux pipeline. Under the elution action of the water flow, the turbidity protection layer is cleaned. The other components and connection relationships are the same as those of the specific embodiment one.

[0061] Specific implementation method three: Combination Figures 1 to 4This embodiment is described. An integrated water purification device coupled with hollow fiber membrane filtration using ultrafiltration technology is used to treat manganese-micro-polluted water source water, with reference to the water treatment operation process under the condition of excessive influent pollutant concentration. The hollow fiber membrane filter assembly is a vertically arranged ultrafiltration membrane assembly, and the transmembrane pressure difference of the ultrafiltration membrane assembly is automatically controlled by a pressure transmitter and an automatic high-pressure exhaust valve, and the transmembrane pressure difference is controlled at 40-60cm. The cleaning process is air washing-air-water washing-water washing. Specifically, the air inlet valve on the assembly cleaning device pipeline is opened, and air enters the cleaning water inlet main pipe and several cleaning branches. The cleaning water inlet main pipe and the cleaning branch are both provided with filter heads. Air is sprayed out from the filter head on the pipeline, and the impurities on the hollow fiber membrane filter assembly are scrubbed down and suspended in water. The air inlet valve is closed, and the cleaning water inlet valve and the reflux valve on the reflux pipeline are opened. The cleaning water flows back to the sludge concentration chamber through the reflux pipeline. Under the elution action of the water flow, the turbidity protection layer is cleaned. The other components and connection relationships are the same as those of the specific embodiment one.

[0062] Specific implementation method four: Combination Figures 1 to 4 This embodiment describes an integrated water purification device coupled with hollow fiber membrane filtration using a nanofiltration process to treat salt water, referring to the water treatment operation process under the condition of excessive influent pollutant concentration. Among them, the oxidizing agent in the emergency agent tank is replaced with a softening agent, and with the assistance of the electrodes in the upward current flocculation chamber, a large amount of hydroxide is generated through cathode polarization to promote the softening of calcium and magnesium hardness in the water. The hollow fiber membrane filter assembly is a vertically arranged nanofiltration membrane assembly, and the transmembrane pressure difference of the ultrafiltration membrane assembly is automatically controlled by a pressure transmitter and an automatic high-pressure exhaust valve, and the transmembrane pressure difference is controlled at 30-50cm.

[0063] The cleaning process is hydraulic enhanced cleaning. Specifically, the cleaning water inlet valve on the component cleaning device pipeline and the reflux valve on the reflux pipeline are opened, and the cleaning water flows back to the sludge concentration chamber through the reflux pipeline. Under the elution effect of the water flow, the turbidity protection layer is cleaned. Other components and connection relationships are the same as those in the first specific implementation method.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated water purification device coupled with hollow fiber membrane filtration, characterized in that: The invention comprises a tank body (1), a flocculant tank (2) and an emergency tank (3), wherein a trumpet tube (4) with an opening facing upward is vertically arranged inside the tank body (1), a nozzle (5) is connected to the lower part of the trumpet tube (4), the inlet end of the nozzle (5) is connected to a pipeline mixer (6), a raw water storage tank, a flocculant tank (2) and an emergency tank are respectively connected to the water inlet end of the pipeline mixer (6) through pipelines, a plurality of electrode plates are arranged in the upper space of the trumpet tube (4) to form an upward current electroflocculation chamber (7), a cover body (8) is arranged outside the trumpet tube (4), the top end of the cover body (8) is sealed and connected to the top of the tank body (1), the bottom end of the cover body (8) is an open end, and the cover body (8) is provided with a cover body (8). ) and the trumpet tube (4) form a downward flow flocculation chamber (9); the internal space of the tank body (1) outside the cover body (8) is arranged with a membrane filter chamber, a component cleaning device (10), a turbidity protection layer (11), a biofilm honeycomb chamber (12) and a sludge concentration chamber (13) in order from top to bottom; a sludge discharge assembly is connected to the upper outer side of the sludge concentration chamber (13); the sludge discharge assembly is connected to the nozzle (5) through a sludge return pipe (14); a plurality of hollow fiber membrane filter assemblies (15) are arranged in the membrane filter chamber; the lower part of the membrane filter chamber is connected to the sludge concentration chamber (13) through a return pipe (23); and the top of each hollow fiber membrane filter assembly (15) is connected to a water production pipe (16).

2. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: A pressure transmitter (17) and a PLC control unit are provided on the water production pipe (16), and an automatic high-pressure exhaust valve (18) is provided on the top of the pool body (1).

3. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: The biofilm honeycomb chamber (12) is filled with a honeycomb porous medium, and microorganisms are attached to the honeycomb porous medium.

4. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: The turbidity protection layer (11) comprises a clean water adsorption sponge and a support frame for mounting the clean water adsorption sponge.

5. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: The mud discharge assembly comprises a mud discharge bucket (19), an automatic mud discharge device (20) and a mud discharge main pipeline (21); the mud discharge bucket (19) is communicated with the upper part of the mud residue concentration chamber (13); the automatic mud discharge device (20) is arranged on the mud discharge main pipeline (21); a mud return pipe (14) is connected and arranged between the mud discharge main pipeline (21) and the nozzle (5); and a first valve is arranged on the mud return pipe (14).

6. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: The component cleaning device (10) comprises a cleaning water inlet main pipe (10-1) and a plurality of cleaning branch pipes (10-2) which are connected and fixed to each other. The cleaning water inlet main pipe (10-1) is provided with a cleaning water inlet valve and an air inlet valve.

7. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: Second valves are respectively provided on the water inlet pipe between the raw water storage tank and the pipeline mixer (6), on the flocculant dosing pipe between the flocculant tank (2) and the pipeline mixer (6), and on the agent dosing pipe between the emergency agent tank (3) and the pipeline mixer (6).

8. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: A vent pipe (22) is connected to the bottom of the tank body (1).

9. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: Several electrode plates are arranged at equal distances.

10. The integrated water purification device coupled with hollow fiber membrane filtration according to claim 1, characterized in that: The bottom of the cover body (8) is a gradually closing structure.

Images