An apparatus for catalytic oxy-chlorination of manganese ions in drinking water

Abstract

This application discloses a device for catalytic chlorination of manganese ions in drinking water, belonging to the technical field of drinking water purification. The device includes a catalytic oxidation reaction apparatus, a chlorination apparatus, a dosing apparatus, an ultrafiltration separation apparatus, and a sludge return and discharge collection apparatus. The device utilizes aluminum-pillared bentonite to catalytically chlorinate and oxidize Mn in water. 2+ The first oxidation zone can promote the reaction of chlorine- and aluminum-pillared bentonite with Mn in water. 2+ The combination and oxidation process prevents catalyst deposition; the submerged ultrafiltration tank achieves sludge-water separation, and the retained sludge is returned to zone I for further catalytic oxidation of Mn in the influent. 2+ The catalyst is added once and recycled together with the oxidation product MnOx, resulting in a fast oxidation rate. Compared with simple chlorination and traditional manganese sand filters, this application can greatly shorten the reaction time, reduce the treatment space, and produce high-quality effluent that meets the drinking water hygiene standards.

Description

Technical Field

[0001] This application belongs to the field of drinking water purification technology, and in particular relates to a device for catalytic chlorination of manganese ions in drinking water. Background Technology

[0002] Manganese is a ubiquitous element in the natural environment, existing in ionic form in various water bodies, especially groundwater and deep surface water. Although manganese is one of the essential trace elements for the human body, playing a crucial role in various physiological functions, excessive intake of manganese ions may have adverse effects on human health, including neurological dysfunction, decreased sleep quality, impaired motor coordination, and cognitive impairment. Furthermore, untreated manganese ions in water supply systems can also contribute to this problem. 2+ During transportation, manganese is easily oxidized, generating insoluble manganese oxides. These oxides can deposit on the inner wall of pipes, causing pipe blockage and metal contamination, which seriously affects the operating efficiency of the water supply system and water quality safety. Therefore, developing effective manganese removal technology is crucial for ensuring public health and the stable operation of the water supply system.

[0003] Currently, the existing integrated manganese removal devices mainly include the following types:

[0004] Prior art document 1 (CN115385478A) discloses an integrated water purification equipment for iron and manganese removal using membrane technology, including a container system, a sludge treatment system, a screw press, an integrated steel membrane tank, and a flocculation sedimentation tank. The sludge treatment system is installed on one side of the container system, the screw press is installed on one side of the sludge treatment system, the flocculation sedimentation tank is installed on one side of the screw press, and the integrated steel membrane tank is installed on one side of the flocculation sedimentation tank. Its working mechanism is to increase dissolved oxygen in the water through aeration in the iron and manganese removal aeration tank and aeration in the submerged ultrafiltration tank, which can promote the reaction of iron and manganese in the water. Compared with traditional processes, the iron and manganese removal rate is higher.

[0005] Prior art document 2 (CN218539476U) discloses a manganese-containing wastewater treatment system, in which a collection tank transports manganese-containing wastewater into a coagulation reaction tank; a hydroxide dosing device mixes hydroxide into the transported manganese-containing wastewater; a flocculant dosing device is connected to the coagulation reaction tank and transports flocculant thereto; an ultramagnetic separation system includes a high-shear machine, a magnetic seed dosing pump, and a magnetic separation drum; a sludge return pump returns sludge to the wastewater inlet of the coagulation reaction tank; its working mechanism is the combination of ultramagnetic water purification technology and flocculation sedimentation method to effectively remove manganese ions from wastewater.

[0006] Traditional manganese removal methods include chemical oxidation, ion exchange, adsorption, and biological treatment. While these methods can remove Mn to some extent... 2+However, traditional aeration manganese removal processes often suffer from problems such as low processing efficiency, high cost, complex operation, and potential secondary pollution. For example, during the aeration filtration process, Mn... 2+ Oxidation to tetravalent manganese requires a stronger oxidizing environment, resulting in problems such as insufficient oxidation, poor manganese removal efficiency, cumbersome processes, high operating costs, frequent regeneration, high wastewater ratio, large footprint, and difficult management and maintenance. However, under natural conditions, chlorination oxidizes Mn... 2+ The process is extremely slow; adsorption and ion exchange methods require regular replacement of adsorbents or ion exchange resins, increasing operating costs.

[0007] Studies have found that simple chlorination of Mn 2+ The rate is slow; metal-pillared bentonite has a large specific surface area and many active sites, which can significantly increase the concentration of Mn in water. 2+ The oxidation rate is high, and the products exhibit autocatalytic activity, but metal-pillared bentonite and Mn... 2+ Oxidation products are fine particles, making separation difficult and affecting effluent quality; therefore, it is necessary to develop a Mn removal process that integrates oxidation, sludge-water separation, and catalyst recycling. 2+ Integrated equipment is crucial. Summary of the Invention

[0008] This application provides a device for catalytic chlorination of manganese ions in drinking water, which solves the problems of slow oxidation rate, low purification efficiency, and inability to recycle the catalyst in drinking water.

[0009] This application provides an apparatus for catalytic chlorination of manganese ions in drinking water, including a catalytic oxidation reaction device. The catalytic oxidation reaction device is provided with multiple oxidation zones. The catalytic oxidation reaction device is connected to a chlorination device and a chemical dosing device. An ultrafiltration separation device is provided on one side of the catalytic oxidation reaction device. The catalytic oxidation reaction device and the ultrafiltration separation device are connected through a sludge return and discharge collection device.

[0010] In one embodiment,

[0011] The oxidation zone includes oxidation zone I, oxidation zone II, and oxidation zone III.

[0012] In one embodiment,

[0013] A mechanical stirrer is provided in the middle of the first oxidation zone.

[0014] In one embodiment,

[0015] The bottom of the first oxidation zone is provided with a first sludge hopper, and the bottom of the ultrafiltration separation device is provided with a second sludge hopper. Both the first and second sludge hoppers are composed of two inclined bucket slopes.

[0016] In one embodiment,

[0017] The bottom of the first oxidation zone and the second oxidation zone are connected to a first water outlet, the top of the second oxidation zone and the third oxidation zone are connected to a second water outlet, and the bottom of the third oxidation zone and the ultrafiltration separation device are connected to a third water outlet.

[0018] In one embodiment,

[0019] The chlorination device includes a sodium hypochlorite dosing tank, the top of which is connected to a second metering pump; the chlorination device also includes an acid dosing tank, the top of which is connected to a third metering pump, and both the second and third metering pumps are equipped with inlet pipes and connected to the first oxidation zone through the inlet pipes.

[0020] In one embodiment,

[0021] The dosing device includes a polyaluminum chloride dosing tank, the top of which is connected to a first metering pump, and the other side of the first metering pump is provided with a dosing pipe, which is connected to the first oxidation zone.

[0022] In one embodiment,

[0023] The ultrafiltration separation device includes a submerged ultrafiltration tank, a pumping assembly, and an aeration assembly. The submerged ultrafiltration tank has a submerged ultrafiltration assembly at the top and a sludge discharge pipe at the bottom. The submerged ultrafiltration assembly has an aeration system at the bottom. The pumping assembly includes a suction pump connected to the submerged ultrafiltration assembly, and a water storage tank is connected to one end of the suction pump. The aeration assembly includes a blower, which is connected to the aeration system through a pipeline.

[0024] In one embodiment,

[0025] The sludge return and discharge collection device includes a sludge return pump connected to the sludge discharge pipe, and a sludge return pipe at the other end of the sludge return pump. The sludge return pipe is connected to the first oxidation zone, and a sludge storage tank is also connected to one side of the sludge return pump.

[0026] In one embodiment,

[0027] The water inlet pipe is equipped with a first valve at one end near the first oxidation zone, the return sludge pipe is equipped with a second valve at one end near the first oxidation zone, the water storage tank is equipped with a third valve at the top, and the sludge storage tank is equipped with a fourth valve at the top.

[0028] A device for catalytic chlorination of manganese ions in drinking water involves the initial addition of aluminum-pillared bentonite for catalytic oxidation. After initial catalytic oxidation, the catalyst can be recycled back to the front end, eliminating the need for additional catalyst addition. The product, MnOx, exhibits autocatalytic activity, accelerating the removal of Mn ions from the water.2+ Oxidation significantly shortens reaction time and reduces processing space, resulting in improved effluent Mn content after 30 days of continuous operation. 2+ The concentration remains consistently below 0.1 mg / L, effectively removing pollutants such as bacteria, viruses, and algae from the water with significant results. This application promotes the combination of oxidants and catalysts with manganese ions in the water. Chlorinated oxidants are added to the inlet pipe in Zone I, and acid is simultaneously added to adjust the pH of the aqueous solution, increasing the oxidation rate. The first sludge hopper effectively prevents the deposition of aluminum-pillared bentonite in Zones I and II, thereby improving oxidation efficiency. The submerged ultrafiltration tank achieves sludge-water separation. The bottom slope of Zone III and the sludge intercepted by the submerged ultrafiltration tank are deposited in the sludge hopper. The sludge is then returned to Zone I via a perforated sludge discharge pipe and a return pump for further catalytic oxidation of Mn in the inlet water. 2+ Through recycling, the catalyst can be reused. In addition, the oxidation product MnOx has a self-catalytic effect, which not only increases the oxidation rate of manganese, but also continuously increases the amount of oxidation product MnOx. Excess MnOx is discharged into the sludge storage tank, and the manganese can be recovered from the settled sludge. This also greatly reduces the cost of catalytic oxidation. This invention can quickly start the chlorine catalytic oxidation reaction, and is not affected by region, water quality, manganese content, or filter rate. It can flexibly deal with various water sources with excessive manganese ions. It has a small footprint and space requirement, is easy to manage and maintain, and ensures drinking water safety. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of this application;

[0031] Figure 2 This is a schematic cross-sectional view of the catalytic oxidation reactor and the submerged ultrafiltration tank of this application;

[0032] Figure 3 This is a top view schematic diagram of the catalytic oxidation reactor and submerged ultrafiltration tank of this application;

[0033] Figure 4 For 30 days, remove Mn 2+ Renderings;

[0034] Figure 5 This is a process flow diagram for this application.

[0035] Explanation of symbols in the diagram:

[0036] A. Catalytic oxidation reactor; B. Chlorination unit; C. Chemical dosing unit; D. Ultrafiltration separation unit; E. Sludge return and discharge collection unit; 1. Mechanical stirrer; 2. Inlet pipe; 3. Chemical dosing pipe; 4. Sludge return pipe; 5. First outlet; 6. First sludge hopper; 7. Second outlet; 8. Third outlet; 9. Second sludge hopper; 10. Sludge discharge pipe; 11. Sludge storage tank; 12. Submerged ultrafiltration module; 13. Blower; 4. Suction pump; 15. Water storage tank; 16. Polyaluminum chloride (PAC) dosing tank; 17. First metering pump; 18. Sludge return pump; 19. Second metering pump; 20. Sodium hypochlorite dosing tank; 21. Third metering pump; 22. Acid dosing tank; 23. First valve; 24. Second valve; 25. Third valve; 26. Fourth valve; 27. First hopper slope; 28. Second hopper slope; 29. ​​Third hopper slope; 30. Fourth hopper slope. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, this application will be further described in detail. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0038] In one embodiment, a device for catalytically oxidizing manganese ions in drinking water, such as... Figure 1-3 As shown, it includes a catalytic oxidation reactor A, which is equipped with multiple oxidation zones. The catalytic oxidation reactor A is connected to a chlorination device B and a chemical dosing device C. An ultrafiltration separation device D is provided on one side of the catalytic oxidation reactor A. The catalytic oxidation reactor A and the ultrafiltration separation device D are connected through a sludge return and discharge collection device E.

[0039] Catalytic oxidation reactor A is the main oxidation reaction zone. Chlorination unit B is used to store sodium hypochlorite and acid solution, which are used as oxidants and to adjust the pH of the solution, respectively. Dosing system C is used to store polyaluminum chloride (PAC) flocculant to promote sedimentation. Ultrafiltration separation unit D is used for filtration separation. Sludge return and discharge collection unit E is used to separate sludge and recovered chlorine.

[0040] In one embodiment, the catalytic oxidation reactor A has three oxidation zones: a first oxidation zone, a second oxidation zone, and a third oxidation zone. A mechanical stirrer 1 is provided in the middle of the first oxidation zone. A first sludge hopper 6 is provided at the bottom of the first oxidation zone, and a second sludge hopper 9 is provided at the bottom of the ultrafiltration separation device D. Both the first sludge hopper 6 and the second sludge hopper 9 are composed of two inclined hopper slopes. A first water outlet 5 is provided at the bottom of the first oxidation zone and the second oxidation zone, a second water outlet 7 is provided at the top of the second oxidation zone and the third oxidation zone, and a third water outlet 8 is provided at the bottom of the third oxidation zone and the ultrafiltration separation device.

[0041] Specifically, both the first sludge hopper 6 and the second sludge hopper 9 consist of two inclined hopper slopes with different angles, forming a trapezoidal shape. The first sludge hopper 6 is composed of a first hopper slope 27 and a second hopper slope 28, while the second sludge hopper 9 is composed of a third hopper slope 29 and a fourth hopper slope 30. The first hopper slope 27 and the fourth hopper slope 30 have an inclination angle of 45°, the second hopper slope 28 has an inclination angle of 30° towards the first oxidation zone, and the third hopper slope 29 has an inclination angle of 30° towards the ultrafiltration separation device D. The first sludge hopper 6 can prevent catalyst deposition in zones I and II, while the second sludge hopper 9 can trap sludge deposited in the hopper. The first outlet... 5 connects the bottom of oxidation zone I and oxidation zone II, and works with the first sludge hopper 6 and mechanical stirrer 1 to effectively prevent catalyst deposition, thereby promoting the oxidation of manganese ions; the second outlet 7 connects the top of oxidation zone II and oxidation zone III, guiding the water from oxidation zone II to oxidation zone III to ensure oxidation time; the third outlet 8 connects oxidation zone III and the bottom of ultrafiltration separation device D, which can effectively achieve the sedimentation and separation of impurities such as sludge and sand into the second sludge hopper 9. The sludge intercepted by ultrafiltration separation device D will also settle into the second sludge hopper 9, which is convenient for the recycling of sludge.

[0042] In one embodiment, the chlorination device B includes a sodium hypochlorite dosing tank 20, the top of which is connected to a second metering pump 19 via a pipe; the chlorination device also includes an acid dosing tank 22, the top of which is connected to a third metering pump 21 via a pipe, and both the second metering pump 19 and the third metering pump 21 are provided with a water inlet pipe 2 and are connected to the first oxidation zone via the water inlet pipe 2.

[0043] Sodium hypochlorite dosing tank 20 can provide chlorine catalytic conditions for manganese oxide ions. The second metering pump 19 and the third metering pump 21 can accurately dispense sodium hypochlorite and acid according to the calculated amount. Sodium hypochlorite and acid enter the first oxidation zone through the water inlet pipe 2. A first valve 23 is provided on the water inlet pipe 2 near the outside of the second oxidation zone. The first valve 23 is used to control the switch of the chlorination device B.

[0044] In one embodiment, the dosing device C includes a polyaluminum chloride (PAC) dosing tank 16, which stores polyaluminum chloride (PAC) coagulant to form larger flocs in the silt, which is conducive to settling. The top of the polyaluminum chloride (PAC) dosing tank 16 is connected to a first metering pump 17 through a pipe, and the other side of the first metering pump 17 is provided with a dosing pipe 3, which is connected to the first oxidation zone.

[0045] In one embodiment, the ultrafiltration separation device D includes a submerged ultrafiltration tank, a pumping assembly, and an aeration assembly. The submerged ultrafiltration tank has a submerged ultrafiltration assembly 12 at its upper part and a sludge discharge pipe 10 at its lower part. An aeration system is provided at the bottom of the submerged ultrafiltration assembly 12. The pumping assembly includes a suction pump 14 connected to the submerged ultrafiltration assembly 12, and a water storage tank 15 is connected to one end of the suction pump 14. The aeration assembly includes a blower 13, which is connected to the aeration system through a pipe.

[0046] Specifically, the submerged ultrafiltration module 12 traps aluminum-pillared bentonite powder and its oxidation products to achieve mud-water separation. The suction pump 14 is connected to the submerged ultrafiltration module 12 and the water storage tank 15 through pipelines. The submerged ultrafiltration module 12 draws out water through the suction pump 14 and delivers it to the water storage tank 15. A third valve 25 is provided on the pipeline at the top of the water storage tank 15. A sludge discharge pipe 10 is provided at the bottom of the sludge hopper 9.

[0047] In one embodiment, the sludge return and discharge collection device E includes a sludge return pump 18 connected to the sludge discharge pipe 10. The other end of the sludge return pump 18 is provided with a sludge return pipe 4, which is connected to the first oxidation zone. A sludge storage tank 11 is also connected to one side of the sludge return pump 18.

[0048] Specifically, the sludge discharge pipe 10 is connected to the return sludge pipe 4 via the sludge return pump 18. The return sludge pipe 4 is connected to the sludge storage tank 11 and the first oxidation zone via a T-junction. A fourth valve 26 is installed on the pipe at the top of the sludge storage tank 11, and a second valve 24 is installed on the pipe near the first oxidation zone. The catalyst can be returned to the front-end zone I for recycling through the sludge discharge pipe 10, the return pump 18, and the return sludge pipe 4. The sludge intercepted by the submerged ultrafiltration tank is deposited into the sludge hopper 9, and the sludge is returned to the first oxidation zone through the perforated sludge discharge pipe 10 and the return pump 18 for further catalytic oxidation of Mn in the water. 2+ When too much sludge accumulates, valve 24 is closed and valve 26 is opened to intermittently discharge it into the sludge storage tank 11; the excess sludge is used for manganese recovery after settling and separation in the sludge storage tank 11.

[0049] In one embodiment, a device for catalytic chlorination of manganese ions in drinking water was continuously operated for 30 days, and the effluent Mn 2+ The concentration remained consistently below 0.1 mg / L, and it effectively removed pollutants such as bacteria, viruses, and algae from the water, as shown in the results. Figure 4 As shown.

[0050] In one embodiment, an apparatus for catalytically oxidizing manganese ions in drinking water uses aluminum-pillared bentonite (Al-PILC) as a catalyst, such as... Figure 5 As shown, its operation process is as follows:

[0051] I. Start-up: Calculate the Al-PILC dosage based on the Al-PILC dosage concentration and the catalytic oxidation reactor volume, and add it all at once to the first oxidation zone. Then, introduce water, start the dosing system C, chlorination system B, and mechanical stirrer 1. Next, start the suction pump 14 of the submerged ultrafiltration tank. The submerged ultrafiltration module 12 traps the Al-PILC powder and its oxidation products. The purified water enters the storage tank 15 through the suction pump 14. When sludge begins to appear in the second sludge hopper 9, start the sludge return pump 18. The Al-PILC dosage concentration is 10 mg / L, and the influent Mn... 2+ The concentration is 2.5 mg / L;

[0052] II. Al-PILC as a catalyst for the catalytic oxidation of Mn in water by chlorination in oxidation zones I, II, and III. 2+ The adsorption and catalytic oxidation processes are as follows:

[0053] The hydroxyl groups on the surface of Al-PILC sheets first react with Mn in the aqueous solution. 2+ In this process, Al-PILC(Mn) is formed on the surface of the Al-PILC sheets. Al-PILC(Mn) is then oxidized by free chlorine to Al-PILC-MnOx. The MnOx surface contains abundant hydroxyl groups, which rapidly react with Mn in the aqueous solution. 2+ Through ion exchange, Al-PILC-MnOx(Mn) is formed, which is then rapidly oxidized by free chlorine to Al-PILC-MnOx(MnOx). The MnOx generated in the reaction has an autocatalytic effect, further catalyzing the reaction of Mn. 2+ MnOx is oxidized on the surface to form MnOx aggregates Al-PILC-MnOx(MnOx)m; the refluxing aggregates Al-PILC-MnOx(MnOx)m further oxidize Mn in the water. 2+ It forms more and larger aggregates; the main component of MnOx is MnO2, with small amounts of Mn3O4 and Mn(OH)2.

[0054] III. Handling Abnormal Situations: When the sludge settling effect in the submerged ultrafiltration tank is not good, the dosing system C can be turned on to add PAC coagulant to form larger flocs; when too much sludge accumulates in the second sludge hopper 9, the sludge return pump 18 can be turned on to discharge the sludge into the sludge storage tank 11, and the manganese can be recovered after the settled sludge is separated from the water; when the submerged ultrafiltration module 12 is severely clogged, the blower 13 can be turned on to deliver air to the aeration system at the bottom of the submerged ultrafiltration module 12.

[0055] Comparative Example

[0056] A device for catalytic chlorination of manganese ions in drinking water, without using any catalyst, is provided as a comparative example of Example 1, and the operation process is the same as in Example 1.

[0057] During operation, it was found that the amount of sludge generated in sludge hopper 9 was too small and the formation rate was too slow, making it impossible to achieve reflux and sludge recycling; when operating according to the treatment capacity of Example 1, it was found that the effluent Mn 2+ Concentrations exceeding 0.5 mg / L do not meet the 0.1 mg / L / L requirement of the "Standards for Drinking Water Quality" (GB5749-2022). 2+ Standard requirements: For the same equipment, when the influent flow rate is less than 1 / 10 of the influent flow rate in Example 1, the Mn content in the effluent should be... 2+ Only at a concentration of 0.1 mg / L Mn 2+ The standard requirements.

[0058] A device for catalytic chlorination of manganese ions in drinking water includes a catalytic oxidation reactor with multiple oxidation zones. The reactor is connected to a chlorination device and a chemical dosing device. An ultrafiltration separation device is located on one side of the reactor. The catalytic oxidation reactor and the ultrafiltration separation device are connected through a sludge return and discharge collection device. After the aluminum-pillared bentonite is added to start the catalytic oxidation process, the catalyst can be recycled without the need for additional catalyst. The product, MnOx, has an autocatalytic effect, accelerating the removal of Mn ions from the water. 2+ Oxidation significantly shortens reaction time and reduces processing space, resulting in improved effluent Mn content after 30 days of continuous operation. 2+ The concentration remains consistently below 0.1 mg / L, effectively removing pollutants such as bacteria, viruses, and algae from water with significant results. This application promotes the combination of oxidant, catalyst, and manganese ions in the water. The first sludge hopper effectively prevents the deposition of aluminum-pillared bentonite in the first and second oxidation zones, thereby improving oxidation efficiency. The submerged ultrafiltration tank achieves sludge-water separation. The catalyst can be recycled, and the oxidation product MnOx has a self-catalytic effect, which not only increases the oxidation rate of manganese but also realizes manganese recovery and resource utilization, greatly reducing the cost of catalytic oxidation. This invention can quickly start the chlorine catalytic oxidation reaction, unaffected by region, water quality, manganese content, or filter rate, and can flexibly handle various MnOx conditions. 2+ The water source that exceeds the standard has a small footprint and requires little space, making it easy to manage and maintain, thus ensuring drinking water safety.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application, including replacing aluminum-supported bentonite with other metal-supported bentonite and improvements, should be included within the protection scope of this application.

Claims

1. A device for catalytic chlorination of manganese ions in drinking water, characterized in that, Using aluminum-pillared bentonite as a catalyst, the device includes a catalytic oxidation reaction unit, which is provided with multiple oxidation zones. The device is connected to a chlorination device and a chemical dosing device. An ultrafiltration separation device is provided on one side of the device. The catalytic oxidation reaction unit and the ultrafiltration separation device are connected through a sludge return and discharge collection device. The oxidation zone includes oxidation zone I, oxidation zone II, and oxidation zone III; The bottom of the first oxidation zone is provided with a first sludge hopper, and the bottom of the ultrafiltration separation device is provided with a second sludge hopper. Both the first and second sludge hoppers are composed of two inclined bucket slopes. The bottom of the first oxidation zone and the second oxidation zone are connected to a first water outlet, the top of the second oxidation zone and the third oxidation zone are connected to a second water outlet, and the bottom of the third oxidation zone and the ultrafiltration separation device are connected to a third water outlet. The chlorination unit includes a sodium hypochlorite dosing tank and an acid dosing tank; The dosing device includes a polyaluminum chloride dosing tank, the top of which is connected to a first metering pump, and the other side of the first metering pump is provided with a dosing pipe, which is connected to the first oxidation zone. The ultrafiltration separation device includes a submerged ultrafiltration tank, a pumping assembly, and a blower assembly. The submerged ultrafiltration tank has a submerged ultrafiltration assembly at the top and a sludge discharge pipe at the bottom. The submerged ultrafiltration assembly has an aeration system at the bottom.

2. The device for catalytic chlorination of manganese ions in drinking water according to claim 1, characterized in that, A mechanical stirrer is provided in the middle of the first oxidation zone.

3. The device for catalytic chlorination of manganese ions in drinking water according to claim 1, characterized in that, The top of the sodium hypochlorite dosing tank is connected to a second metering pump; the top of the acid dosing tank is connected to a third metering pump. Both the second and third metering pumps are equipped with water inlet pipes and are connected to the first oxidation zone through the water inlet pipes.

4. The device for catalytic chlorination of manganese ions in drinking water according to claim 3, characterized in that, The water pumping assembly includes a suction pump connected to the submerged ultrafiltration assembly, and one end of the suction pump is connected to a water storage tank; the blower assembly includes a blower, and the blower is connected to the aeration system through a pipeline.

5. The device for catalytic chlorination of manganese ions in drinking water according to claim 4, characterized in that, The sludge return and discharge collection device includes a sludge return pump connected to the sludge discharge pipe, and a sludge return pipe at the other end of the sludge return pump. The sludge return pipe is connected to the first oxidation zone, and a sludge storage tank is also connected to one side of the sludge return pump.

6. The apparatus for catalytic chlorination of manganese ions in drinking water according to claim 5, characterized in that, The water inlet pipe is equipped with a first valve at one end near the first oxidation zone, the return sludge pipe is equipped with a second valve at one end near the first oxidation zone, the water storage tank is equipped with a third valve at the top, and the sludge storage tank is equipped with a fourth valve at the top.

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