Ion exchange coupling ceramic membrane integrated water purification equipment

Abstract

The utility model relates to ion exchange coupling ceramic membrane integrated water purification equipment, and discloses water purification equipment which is characterized in that raw water subjected to sand setting treatment is introduced into an HRC exchange tank after being added with a flocculating agent, flocculation and exchange reaction are carried out simultaneously, and then high-precision filtration is carried out through a ceramic membrane treater. The device has broad-spectrum water quality purification capacity, can cope with the quality of complicated and changeable raw water in rural areas, and is safe, reliable, high in impact resistance, high in treatment efficiency, short in process, simple and convenient to regenerate, stable in effluent quality, small in occupied area and simple to operate and maintain. The device is characterized by comprising a rotational flow sand setting device, a PAC dosing device, an HRC exchange tank, a resin trapper and a ceramic membrane processor, the rotational flow sand setting device is communicated with the PAC dosing device, the PAC dosing device is communicated with the HRC exchange tank, the HRC exchange tank is communicated with the ceramic membrane processor, and the resin trapper is communicated with the HRC exchange tank.

Description

Technical Field

[0001] This utility model relates to an integrated ion exchange coupled ceramic membrane water purification device for the stable treatment of complex surface water in rural areas. It belongs to the field of water treatment technology, and specifically relates to a device that adds flocculant to raw water after grit removal treatment before passing it into an HRC exchange tank, where flocculation and exchange reactions occur simultaneously. The water is then filtered with high precision by a ceramic membrane processor. This device possesses broad-spectrum water purification capabilities, can handle the complex and variable raw water quality in rural areas, and features high safety, reliability, shock resistance, high treatment efficiency, short process flow, simple regeneration, stable effluent quality, small footprint, and simple operation and maintenance. Background Technology

[0002] Drinking water sources in rural areas, especially remote mountainous regions, generally consist of surface water from small reservoirs, rivers, ditches, and ponds. These waters are characterized by poor quality and significant seasonal variations. In summer, the organic matter content of surface water increases, and after rain or floods, the water contains a large amount of silt. Traditional coagulation, sedimentation, and sand filtration processes are not designed to handle such large volumes of water and impurity loads, making it difficult to consistently meet water quality standards after treatment. Conventional organic membrane treatment processes, due to the small pore size and sensitive material of organic membranes, are easily clogged and damaged by pollutants. They have extremely stringent requirements for influent water quality, such as temperature, pH, suspended solids and turbidity control, and organic matter content control. Without robust pretreatment measures, they cannot operate at all, resulting in excessively high treatment costs and making them unsuitable for industrial water treatment.

[0003] Publication number CN221319378U discloses a water treatment device, including an installation platform with a treatment equipment box mounted on it. A pretreatment tank is located next to the treatment equipment box, and a pumping pipe connects the pretreatment tank and the treatment equipment box. The pretreatment tank contains a tank body with a cavity inside. A collection and purification device is installed at the top of the cavity, and a connecting conduit is connected to the collection and purification device. When surface water enters, it undergoes multi-stage treatment with the assistance of multiple filter cartridges. Simultaneously, a guide bucket collects sand and gravel into the bottom multi-stage filter cartridges for storage. This water treatment device uses traditional coagulation, sedimentation, and sand filtration processes to treat surface water. However, for surface water with high organic matter content and high silt content, the treated water quality is difficult to consistently meet standards.

[0004] Publication No. CN221117234U discloses an urban wastewater treatment system that can be upgraded and expanded, including a coarse screen tank, a fine screen tank, a biological treatment system, a second anoxic tank, an MBR membrane tank, a sludge thickening tank, a disinfection tank, and a sludge dewatering machine. The coarse screen tank is connected to the fine screen tank via a lift pump. The fine screen tank is connected to the biological treatment system via an aerated grit chamber. The biological treatment system is connected to the MBR membrane tank via the second anoxic tank. The MBR membrane tank is connected to both the disinfection tank and the sludge thickening tank. Part of the sludge in the sludge thickening tank is returned to the biological treatment system, and the other part is treated by the sludge dewatering machine. Publication No. CN118145835A discloses a wastewater deep treatment system and method, including a primary AO reactor, an intermediate sedimentation tank, a secondary AO reactor, an MBR membrane tank, and a disinfection tank connected in sequence. The primary AO reactor, according to the water flow direction, includes a primary anoxic tank and a... A primary aerobic tank, a primary anoxic tank, and a primary aerobic tank are respectively connected to an activated carbon storage container to facilitate the addition of activated carbon to the primary anoxic tank and the primary aerobic tank. The end of the primary aerobic tank is connected to the primary anoxic tank to return the mixed liquid obtained at the end of the primary aerobic tank to the primary anoxic tank. Publication number CN105129983A discloses a method for treating slightly polluted surface water based on a biofilm reactor. A ceramic carrier water pump drives a baffled internal circulation biofilm reactor to remove nitrogen, phosphorus, and / or organic matter from slightly polluted surface water. The biofilm reactor is equipped with a partition plate that divides the reactor into an upper dissolved oxygen zone and a lower biodegradation zone. One end of the dissolved oxygen zone and the biodegradation zone are directly connected, and the other end is connected to a circulation pipe through a circulation pump, so that the wastewater to be treated continuously circulates through the dissolved oxygen zone and the biodegradation zone. Several guide plates are vertically spaced in the biodegradation zone. The above-mentioned water treatment system uses A / O biological treatment to purify raw water. Because the A / O process has high requirements for influent conditions, including pH value, B / C value, hydraulic retention time (HRT), sludge concentration (MLSS and MLVSS), etc., these parameters are not easy to control. In industrial applications where continuous water treatment is required, it is difficult to ensure the effective operation of the A / O process, which can easily lead to unstable effluent quality. Utility Model Content

[0005] To improve upon the above situation, this utility model provides an integrated ion exchange coupled ceramic membrane water purification device. This device involves adding flocculant to raw water that has undergone grit removal treatment before passing it into an HRC exchange tank, where flocculation and exchange reactions occur simultaneously. The water is then filtered with high precision by a ceramic membrane processor. It possesses broad-spectrum water purification capabilities, can handle the complex and varied raw water quality in rural areas, and features high safety, reliability, and shock resistance. It also boasts high treatment efficiency, a short process flow, easy regeneration, stable effluent quality, a small footprint, and simple operation and maintenance.

[0006] This utility model discloses an integrated ion exchange coupled ceramic membrane water purification device, which is implemented as follows: The integrated ion exchange coupled ceramic membrane water purification device includes a cyclone grit chamber, a PAC dosing device, an HRC exchange tank, a resin trap, and a ceramic membrane processor.

[0007] The feature is that the cyclone grit chamber is connected to the PAC dosing device, the PAC dosing device is connected to the HRC exchange tank, the HRC exchange tank is connected to the ceramic membrane processor, and the resin trap is connected to the HRC exchange tank. The raw water flows sequentially through the cyclone grit chamber, the PAC dosing device, the HRC exchange tank, the resin trap, and the ceramic membrane processor. The HRC exchange tank contains magnetic ion exchange resin. The raw water undergoes both flocculation and ion exchange reactions simultaneously within the HRC exchange tank. This results in low coagulant requirements and a small footprint. With low investment and operating costs, the HRC exchange tank effectively reduces raw water turbidity and removes organic matter, minimizing contamination to the downstream ceramic membrane processor. The HRC exchange tank is also connected to a saturated brine tank and a reuse brine tank. After the magnetic ion exchange resin becomes saturated, it is regenerated within the HRC exchange tank using saturated brine (regenerant), eliminating the need for an additional regeneration tank and further reducing floor space and operating costs. The regenerated high-organic-content, high-salinity wastewater is recycled into the reuse brine tank for further treatment and resource recovery.

[0008] Preferably, the cyclone grit chamber is equipped with an ion exchange inlet.

[0009] Preferably, the number of HRC exchange tanks is greater than or equal to 1.

[0010] Preferably, the HRC exchange tank is equipped with a weir trough, an inclined plate assembly, a central cylinder, a stirring assembly, and a gas assembly. The central cylinder is placed inside the HRC exchange tank, and the stirring assembly is rotatably placed inside the HRC exchange tank. The stirring assembly and the central cylinder are coaxially arranged, and the stirring assembly is driven to rotate by a motor. The gas assembly is placed inside the HRC exchange tank and close to one end of the HRC exchange tank. The weir trough is placed at the other end of the HRC exchange tank, and the inclined plate assembly is placed inside the HRC exchange tank and located in the upper middle position of the HRC exchange tank.

[0011] Preferably, there are multiple inclined plate assemblies, and the inclined plate directions of two adjacent inclined plate assemblies are opposite.

[0012] The resin trap is connected to the other end of the HRC exchange tank, and the resin trap is equipped with ion-exchanged effluent.

[0013] The ceramic membrane processor has a water inlet at the top, which is connected to the ion exchange outlet. A wastewater discharge port is located at the bottom, and an outlet port is located at the top.

[0014] Preferably, the ceramic membrane processor includes an aeration pipe, a product water pipe, a ceramic flat plate membrane assembly, and a water collection pipe. Multiple ceramic flat plate membrane assemblies are equidistantly arranged within the ceramic membrane processor. Multiple water collection pipes and multiple ceramic flat plate membrane assemblies are arranged in a one-to-one correspondence within the ceramic membrane processor, with each water collection pipe located below its corresponding ceramic flat plate membrane assembly. The product water pipe is located outside the ceramic membrane processor, and each of the multiple water collection pipes is connected to the product water pipe. The aeration pipe is located inside the ceramic membrane processor, below each of the multiple ceramic flat plate membrane assemblies.

[0015] Preferably, the ceramic membrane processor is further provided with a backwashing assembly, which consists of a ceramic membrane processor air rinsing unit, a ceramic membrane processor backwashing unit, and a membrane cleaning machine.

[0016] The ceramic membrane processor air scouring device is located on the outer wall of the ceramic membrane processor and is connected to the top of the ceramic membrane processor. The ceramic membrane processor backwashing device is located on the outer wall of the ceramic membrane processor and is connected to the bottom of the ceramic membrane processor. The membrane cleaning machine is located on one side of the ceramic membrane processor and is connected to the top of the ceramic membrane processor.

[0017] The ceramic membrane processor is provided with an openable processor top cover, and the top edge of the ceramic membrane processor is provided with a top railing;

[0018] The method for treating and utilizing high-organic-content and high-salt wastewater includes the following steps:

[0019] (1) The high-salt and high-organic wastewater (raw water) generated by the regeneration of magnetic ion exchange resin is treated by adding chemicals for coagulation and sedimentation, and the sediment is filtered to remove the suspended solids in the raw water. The raw water after the suspended solids are removed is then fed into the electrodialysis equipment.

[0020] (2) The raw water is treated by electrodialysis to obtain primary concentrated water and primary desalinated water with high COD;

[0021] COD is removed from the primary concentrate after electrodialysis treatment through an electrochemical reaction, and ozone is introduced during the reaction to obtain primary concentrate with low COD residue.

[0022] (4) The primary concentrate with low COD residue is further concentrated by passing it through a disc tube reverse osmosis membrane (DTRO) to obtain secondary concentrate with low COD residue and secondary desalination with low COD residue.

[0023] (5) Mix the secondary freshwater with low COD residue with the primary freshwater, dilute the primary freshwater, and then treat it with A / O biochemical treatment to remove COD from the mixed freshwater;

[0024] This utility model also relates to an integrated water purification process using ion exchange coupled ceramic membranes, characterized in that the integrated water purification equipment using ion exchange coupled ceramic membranes is used to purify raw water with high sediment and high organic matter content, including the following steps:

[0025] (1) Raw water is dewatered by a cyclone separator to remove dense solids or impurities such as sand and gravel and small particles of gravel. The dewatered raw water then flows to the PAC dosing equipment.

[0026] (2) Coagulant is added to the raw water after sand removal in a certain proportion through the PAC dosing equipment;

[0027] (3) After the raw water and coagulant are mixed, they enter the HRC exchange tank. The coagulant reacts with the suspended solids in the water to form flocs. At the same time, the magnetic ion exchange resin filled in the HRC exchange tank reacts with the dissolved organic matter in the raw water to remove the dissolved organic matter in the raw water.

[0028] (4) The flocs and the raw water after removing organic matter enter the ceramic membrane processor together. The large flocs settle at the bottom of the ceramic membrane processor and are discharged periodically. The water containing small flocs enters the clear water tank after being filtered by the ceramic flat plate membrane assembly.

[0029] (5) The clean water is disinfected to meet the drinking water hygiene standards and then enters the water supply network;

[0030] (6) The saturated magnetic ion exchange resin is regenerated by regeneration solution (concentrated brine) to restore ion exchange performance. The ceramic flat sheet membrane assembly is backwashed regularly by a combination of air and water to remove contaminants in the membrane pores and on the membrane surface, so that the transmembrane pressure difference is kept at a low level and the membrane is kept highly permeable. The ceramic flat sheet membrane assembly is chemically cleaned regularly to remove stubborn contaminants and restore the ceramic membrane flux and separation performance.

[0031] Preferably, the magnetic ion exchange resin is regenerated in an HRC exchange tank. Beneficial effects

[0032] I. Coagulation + magnetic ion exchange pretreatment reduces turbidity and removes organic matter, thereby reducing contamination of the downstream ceramic flat sheet membrane assembly and effectively extending membrane life.

[0033] Second, compared with organic membranes, ceramic flat sheet membranes have better chemical stability, higher separation efficiency, lower transmembrane pressure, lower operating energy consumption, and more stable effluent quality.

[0034] Third, the magnetic ion exchange reaction and the coagulation reaction occur simultaneously in one HRC exchange tank, which not only reduces the amount of reagents added, but also reduces the floor space and lowers investment costs.

[0035] Fourth, the low-speed rotation of the stirring assembly inside the HRC exchange tank helps the coagulant and raw water to mix and react fully, while also stirring the magnetic resin to form a suspension layer, which helps all the resin to participate in the ion exchange reaction.

[0036] 5. The HRC exchange tank and resin trap are connected to collect the small amount of small resin particles that flow out with the water and reuse them, thereby reducing resin loss and saving operating costs. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of an integrated water purification device with ion exchange coupling ceramic membrane according to the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of an integrated water purification device with ion exchange coupling ceramic membrane according to the present invention, which only shows the structure of the HRC exchange tank;

[0039] Figure 3 This is a schematic diagram of the structure of an integrated water purification device with ion exchange coupling ceramic membrane according to the present invention;

[0040] Figure 4 This is a process flow diagram of Embodiment 1 of the ion exchange coupled ceramic membrane integrated water purification equipment of this utility model;

[0041] Figure 5 This is a process flow diagram of Embodiment 2 of the ion exchange coupled ceramic membrane integrated water purification equipment of this utility model.

[0042] Attached Figure

[0043] Among them are:

[0044] Ion exchange inlet (1), cyclone grit chamber (2), PAC dosing equipment (3), saturated brine tank (4), recycled brine tank (5), HRC exchange tank (6), ceramic membrane processor air wash (7), ceramic membrane processor backwash (8), ceramic membrane processor sludge discharge (9), membrane cleaning machine (10), ceramic membrane processor effluent (11), ceramic membrane processor (12), processor top cover (13), top fence (14), ceramic membrane processor inlet (15), ion exchange effluent (16), resin trap (17), weir trough (18), inclined plate assembly (19), central cylinder (20), stirring assembly (21), gas assembly (22), aeration pipe (23), product water pipe (24), ceramic flat sheet membrane assembly (25), water collection pipe (26). Detailed Implementation Example 1

[0045] This utility model discloses an integrated water purification device with ion exchange coupled ceramic membrane, comprising a cyclone grit chamber (2), a PAC dosing device (3), an HRC exchange tank (6), a resin trap (17), and a ceramic membrane processor (12).

[0046] The feature is that the cyclone grit chamber (2) is connected to the PAC dosing device (3), the PAC dosing device (3) is connected to the HRC exchange tank (6), the HRC exchange tank (6) is connected to the ceramic membrane processor (12), and the resin trap (17) is connected to the HRC exchange tank (6). The raw water flows sequentially through the cyclone grit chamber (2), the PAC dosing device (3), the HRC exchange tank (6), the resin trap (17), and the ceramic membrane processor (12). The HRC exchange tank (6) contains magnetic ion exchange resin. The raw water undergoes flocculation and ion exchange reactions simultaneously within the HRC exchange tank (6), resulting in a mixture of flocculation and ion exchange. The HRC exchange tank (6) requires less coagulant, occupies less space, and has low investment and operating costs. It can effectively reduce the turbidity of raw water, remove organic matter from the raw water, and reduce pollution to the downstream ceramic membrane processor (12). The HRC exchange tank (6) is also connected to a saturated brine tank (4) and a reuse brine tank (5). After the magnetic ion exchange resin is saturated, it is regenerated in the HRC exchange tank (6) with saturated brine (regenerant), eliminating the need for an additional regeneration tank and further reducing the footprint and investment and operating costs. The regenerated high-organic-content and high-salt wastewater is recycled into the reuse brine tank (5) and reused through high-organic-content and high-salt wastewater treatment and resource utilization methods.

[0047] Preferably, the cyclone grit chamber (2) is provided with an ion exchange inlet (1).

[0048] Preferably, the number of the HRC exchange tanks (6) is 1.

[0049] Preferably, the HRC exchange tank (6) is provided with a weir trough (18), an inclined plate assembly (19), a central cylinder (20), a stirring assembly (21), and a gas assembly (22). The central cylinder (20) is placed inside the HRC exchange tank (6), and the stirring assembly (21) is rotatably placed inside the HRC exchange tank (6). The stirring assembly (21) and the central cylinder (20) are coaxially arranged. The stirring assembly (21) is driven to rotate by a motor. The gas assembly (22) is placed inside the HRC exchange tank (6) and close to one end of the HRC exchange tank (6). The weir trough (18) is placed inside the HRC exchange tank (6) at the other end. The inclined plate assembly (19) is placed inside the HRC exchange tank (6) and located in the upper middle position of the HRC exchange tank (6).

[0050] Preferably, there are multiple inclined plate assemblies (19), and the inclined plate directions of two adjacent inclined plate assemblies (19) are opposite.

[0051] The resin trap (17) and the HRC exchange tank (6) are connected at the other end, and the resin trap (17) is equipped with ion exchange effluent (16).

[0052] The ceramic membrane processor (12) has a ceramic membrane processor inlet (15) at the top, and the ceramic membrane processor inlet (15) is connected to the ion exchange outlet (16). The ceramic membrane processor (12) has a ceramic membrane processor drain (9) at the bottom, and the ceramic membrane processor outlet (11) is placed on the top of the ceramic membrane processor (12).

[0053] Preferably, the ceramic membrane processor (12) is provided with an aeration pipe (23), a product water pipe (24), a ceramic flat plate membrane assembly (25), and a water collection pipe (26). Multiple ceramic flat plate membrane assemblies (25) are equidistantly placed within the ceramic membrane processor (12). Multiple water collection pipes (26) and multiple ceramic flat plate membrane assemblies (25) are placed in a one-to-one correspondence within the ceramic membrane processor (12). The water collection pipe (26) is located below the corresponding ceramic flat plate membrane assembly (25). The product water pipe (24) is located outside the ceramic membrane processor (12), and the multiple water collection pipes (26) are respectively connected to the product water pipe (24). The aeration pipe (23) is placed within the ceramic membrane processor (12), and the aeration pipe (23) is located below the multiple ceramic flat plate membrane assemblies (25).

[0054] Preferably, the ceramic membrane processor (12) is further provided with a backwashing assembly, which consists of a ceramic membrane processor air wash (7), a ceramic membrane processor water wash (8), and a membrane cleaning machine (10).

[0055] The ceramic membrane processor air wash (7) is placed on the outer wall of the ceramic membrane processor (12) and is connected to the top of the ceramic membrane processor (12). The ceramic membrane processor backwash (8) is placed on the outer wall of the ceramic membrane processor (12) and is connected to the bottom of the ceramic membrane processor (12). The membrane cleaning machine (10) is placed on one side of the ceramic membrane processor (12) and is connected to the top of the ceramic membrane processor (12).

[0056] The ceramic membrane processor (12) is provided with an openable processor top cover (13) and a top railing (14) is provided on the top edge of the ceramic membrane processor (12).

[0057] During use, raw water enters the cyclone grit chamber (2) through the ion exchange inlet (1) to remove dense solids or impurities such as sand, gravel, and small particles. After coagulant is added through the PAC dosing device (3), the water enters the HRC exchange tank (6). The stirring assembly (21) inside the HRC exchange tank (6) rotates at low speed to fully mix the raw water and coagulant. The suspended solids in the water react with the coagulant to form flocs. At the same time, the raw water and the magnetic ion exchange resin in the tank come into full contact to form a suspended reaction layer. The dissolved organic matter in the water reacts with the magnetic ion exchange resin. The resin undergoes an ion exchange reaction, removing organic matter. The raw water, after the organic matter has been removed, flows upward from the HRC exchange tank (6) to the resin trap (17). The resin trap (17) collects a small amount of magnetic ion exchange resin flowing out with the water via magnetic attraction and reuses it. Then, the raw water flows from the ion exchange effluent (16) and the ceramic membrane processor inlet (15) into the ceramic membrane processor (12). Multiple ceramic flat plate membrane assemblies (25) perform multi-stage filtration on the raw water after the removal of organic matter. At the same time, the aeration pipe (23) provides aeration to accelerate the removal of micro-solids in the raw water. The separation of the body and water, the filtered clear water is collected through the water collection pipe (26) to the product water pipe (24), and then flows out from the ceramic membrane processor outlet (11); after running for a period of time, the brine (regenerated liquid) in the saturated brine tank (4) is introduced into the HRC exchange tank (6) to regenerate the saturated magnetic ion exchange resin. During the regeneration process, the stirring assembly (21) stirs at low speed to fully mix the saturated resin and brine. The regenerated magnetic ion exchange resin restores its exchange performance and remains in the HRC tank for the next stage of exchange reaction. The regenerated saturated brine enters the return flow. The wastewater is recycled and reused in the brine tank (5) through the treatment and resource utilization of high organic matter and high salt wastewater; the ceramic flat plate membrane assembly (25) is regularly backwashed online by the ceramic membrane processor air washing (7) and ceramic membrane processor backwashing (8) to remove pollutants in the membrane channels and on the membrane surface, so that the transmembrane pressure difference is at a low level and the membrane is highly permeable; the ceramic flat plate membrane assembly (25) is regularly chemically cleaned online by the membrane cleaning machine (10) to remove stubborn pollutants and restore the flux and separation performance of the ceramic flat plate membrane. Example 2

[0058] The difference between this embodiment and Embodiment 1 is that the integrated ion exchange coupled ceramic membrane water purification equipment includes a cyclone grit chamber (2), a PAC dosing device (3), an HRC exchange tank (6), a resin trap (17), and a ceramic membrane processor (12). The cyclone grit chamber (2) and the PAC dosing device (3) are connected, the PAC dosing device (3) and the HRC exchange tank (6) are connected, the HRC exchange tank (6) and the ceramic membrane processor (12) are connected, and the resin trap (17) and the HRC exchange tank (6) are connected. The raw water flows sequentially through the cyclone grit chamber (2), the PAC dosing device (3), the HRC exchange tank (6), the resin trap (17), and the ceramic membrane processor (12). The HRC exchange tank (6) contains magnetic ion exchange resin. The raw water undergoes flocculation and ion exchange reactions simultaneously in the HRC exchange tank (6). The amount of coagulant required is small, the footprint is small, and the dosage is low. With low investment and operating costs, the HRC exchange tank (6) can effectively reduce the turbidity of the raw water, remove organic matter from the raw water, and reduce pollution to the downstream ceramic membrane processor (12). The HRC exchange tank (6) is also connected to a saturated brine tank (4) and a reuse brine tank (5). After the magnetic ion exchange resin is saturated, it is regenerated in the HRC exchange tank (6) by saturated brine (regeneration liquid), without the need for additional regeneration tanks, further reducing the footprint and investment and operating costs. The regenerated high organic matter and high salt wastewater is recycled into the reuse brine tank (5) and recycled and reused through the high organic matter and high salt wastewater treatment and resource utilization methods. The cyclone grit chamber (2) is equipped with an ion exchange inlet (1), and the number of HRC exchange tanks (6) is 2. When in use, two HRC exchange tanks (6) are used, one of which performs flocculation and ion exchange reaction, and the other performs regeneration reaction through salt solution. Ion exchange and regeneration are carried out simultaneously, which can ensure continuous water production.

[0059] The method for treating and utilizing high-organic-content and high-salt wastewater includes the following steps:

[0060] (1) The high-salt and high-organic wastewater (raw water) generated by the regeneration of magnetic ion exchange resin is treated by adding chemicals for coagulation and sedimentation, and the sediment is filtered to remove the suspended solids in the raw water. The raw water after the suspended solids are removed is then fed into the electrodialysis equipment.

[0061] (2) The raw water is treated by electrodialysis to obtain primary concentrated water and primary desalinated water with high COD;

[0062] COD is removed from the primary concentrate after electrodialysis treatment through an electrochemical reaction, and ozone is introduced during the reaction to obtain primary concentrate with low COD residue.

[0063] (4) The primary concentrate with low COD residue is further concentrated by passing it through a disc tube reverse osmosis membrane (DTRO) to obtain secondary concentrate with low COD residue and secondary desalination with low COD residue.

[0064] (5) Mix the secondary freshwater with low COD residue with the primary freshwater, dilute the primary freshwater, and then treat it with A / O biochemical treatment to remove COD from the mixed freshwater;

[0065] This utility model discloses an integrated ion exchange coupled ceramic membrane water purification process, characterized in that it utilizes the integrated ion exchange coupled ceramic membrane water purification equipment to purify surface water with high sediment and high organic matter content, comprising the following steps:

[0066] (1) The raw water passes through a cyclone separator (2) to remove dense solids or impurities such as sand, gravel and small particles of stone. The raw water after sand removal flows to the PAC dosing equipment (3).

[0067] (2) Coagulant is added to the raw water after sand removal in a certain proportion through the PAC dosing equipment (3);

[0068] Preferably, the ratio of raw water to coagulant is:

[0069] Preferably, the raw water with high organic matter and high sediment content contains a lot of high-density solids or impurities, which will affect the dispersion and flocculation effect of the dispersant. After being removed by the cyclone grit chamber (2), the amount of coagulant added can be reduced, and the treatment burden of the intermediate HRC exchange tank (6) can be reduced, effectively reducing the treatment cost.

[0070] (3) After the raw water and coagulant are mixed, they enter the HRC exchange tank (6). The coagulant reacts with the suspended solids in the water to form flocs. At the same time, the magnetic ion exchange resin filled in the HRC exchange tank (6) reacts with the dissolved organic matter in the raw water to remove the dissolved organic matter in the raw water.

[0071] Preferably, the flocculation reaction and ion exchange reaction are carried out simultaneously in the HRC exchange tank (6). The stirring force acts simultaneously on the mixing of raw water and flocculant, the mixing of raw water and magnetic ion exchange resin, and the stirring of magnetic ion exchange resin. This can effectively reduce the amount of coagulant added, the equipment occupies a small area, and the initial investment and operating costs are low. The process parameters such as stirring speed can be uniformly controlled, simplifying the operation process, reducing the number of process variables to be monitored and adjusted, and making the overall process more stable and controllable.

[0072] (4) The flocs and the raw water after removing organic matter enter the ceramic membrane processor (12) together. The large flocs settle at the bottom of the ceramic membrane processor (12) and are discharged periodically. The water containing small flocs enters the clear water tank after being filtered by the ceramic flat plate membrane assembly (25).

[0073] Preferably, the method of removing organic matter and reducing turbidity in raw water through flocculation reaction and ion exchange reaction can reduce pollution to the downstream ceramic flat plate membrane assembly (25), reduce the accumulation of dirt on the membrane surface, reduce the frequency of backwashing and chemical cleaning, and reduce the overall operating cost. The large flocs formed settle at the bottom of the ceramic membrane processor (12) and are discharged regularly, which can effectively reduce the filtration burden of the ceramic flat plate membrane assembly (25). At the same time, the small flocs formed are more easily intercepted by the ceramic flat plate membrane assembly (25), resulting in good filtration effect.

[0074] (5) The clean water, after disinfection, meets the national drinking water hygiene standards and enters the water supply network;

[0075] (6) The saturated magnetic ion exchange resin is regenerated by regeneration solution (concentrated brine) to restore ion exchange performance. The ceramic flat sheet membrane assembly (25) is backwashed regularly by a combination of air and water to remove contaminants in the membrane pores and on the membrane surface, so that the transmembrane pressure difference is kept at a low level and the membrane is kept highly permeable. The ceramic flat sheet membrane assembly (25) is chemically cleaned regularly to remove stubborn contaminants and restore the ceramic membrane flux and separation performance.

[0076] Preferably, the magnetic ion exchange resin is regenerated in the HRC exchange tank (6), which eliminates the need for a separate regeneration tank for the regeneration process, further reducing the floor space and investment and operating costs. The magnetic ion exchange resin does not need to be transferred, making the operation simpler.

[0077] The goal is to achieve broad-spectrum water purification capabilities, cope with the complex and ever-changing raw water quality in rural areas, and be safe, reliable, highly resistant to shocks, highly efficient, with a short process, easy regeneration, stable effluent quality, small footprint, and simple operation and maintenance.

[0078] It should be noted that, unless otherwise explicitly specified and limited, the terms "placed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections such as folded edges, rivets, pins, adhesives, and welds; detachable connections such as threaded connections, snap-fit ​​connections, and hinges; integral connections; electrical connections; direct connections; or indirect connections via an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

Claims

1. An integrated water purification device with ion exchange coupled ceramic membrane, characterized in that... The system includes a cyclone grit chamber, a PAC dosing device, an HRC exchange tank, a resin trap, and a ceramic membrane processor. The cyclone grit chamber and the PAC dosing device are connected. The PAC dosing device and the HRC exchange tank are connected. The HRC exchange tank and the ceramic membrane processor are connected. The resin trap and the HRC exchange tank are connected. Raw water flows sequentially through the cyclone grit chamber, the PAC dosing device, the HRC exchange tank, the resin trap, and the ceramic membrane processor. The HRC exchange tank contains magnetic ion exchange resin. The raw water undergoes flocculation and ion exchange reactions simultaneously in the HRC exchange tank. The HRC exchange tank is also connected to a saturated brine tank and a reuse brine tank.

2. The integrated water purification device with ion exchange coupled ceramic membrane according to claim 1, characterized in that... The cyclone grit chamber is equipped with an ion exchange inlet, and the number of HRC exchange tanks is greater than or equal to 1.

3. The integrated water purification device with ion exchange coupled ceramic membrane as described in claim 1, characterized in that... The HRC exchange tank is equipped with a weir, inclined plate assembly, central cylinder, stirring assembly, and gas assembly. The central cylinder is placed inside the HRC exchange tank. The stirring assembly is rotatably placed inside the HRC exchange tank and is coaxial with the central cylinder. The stirring assembly is driven to rotate by a motor. The gas assembly is placed inside the HRC exchange tank and is located near one end of the HRC exchange tank. The weir is placed at the other end of the HRC exchange tank. The inclined plate assembly is placed inside the HRC exchange tank and is located in the upper middle position of the HRC exchange tank. There are multiple inclined plate assemblies, and the inclined plates of two adjacent inclined plate assemblies are in opposite directions. The resin trap is connected to the other end of the HRC exchange tank, and ion exchange effluent is placed on the resin trap.

4. The integrated water purification device with ion exchange coupled ceramic membrane according to claim 1, characterized in that... The ceramic membrane processor has a water inlet at the top, which is connected to the ion exchange outlet. The ceramic membrane processor also has a wastewater discharge outlet at the bottom and an outlet at the top.

5. The integrated water purification device with ion exchange coupled ceramic membrane according to claim 4, characterized in that... The ceramic membrane processor is equipped with an aeration pipe, a product water pipe, a ceramic flat plate membrane assembly, and a water collection pipe. Multiple ceramic flat plate membrane assemblies are equidistantly placed inside the ceramic membrane processor. Multiple water collection pipes and multiple ceramic flat plate membrane assemblies are placed in a one-to-one correspondence inside the ceramic membrane processor. The water collection pipe is located below the corresponding ceramic flat plate membrane assembly. The product water pipe is located outside the ceramic membrane processor. Multiple water collection pipes are connected to the product water pipes respectively. The aeration pipe is located inside the ceramic membrane processor and is located below the multiple ceramic flat plate membrane assemblies.

6. The integrated water purification device with ion exchange coupled ceramic membrane according to claim 5, characterized in that... The ceramic membrane processor is also equipped with a backwashing assembly, which consists of a ceramic membrane processor air wash, a ceramic membrane processor backwash, and a membrane cleaning machine. The ceramic membrane processor air wash is placed on the outer wall of the ceramic membrane processor and is connected to the top of the ceramic membrane processor. The ceramic membrane processor backwash is placed on the outer wall of the ceramic membrane processor and is connected to the bottom of the ceramic membrane processor. The membrane cleaning machine is placed on one side of the ceramic membrane processor.

7. The integrated water purification device with ion exchange coupled ceramic membrane according to claim 6, characterized in that... The ceramic membrane processor is provided with an openable processor top cover, and the top edge of the ceramic membrane processor is provided with a top railing.

Images