Ammonia nitrogen wastewater treatment system
The combined treatment system of ammonia nitrogen adsorption, regeneration, and chlorination oxidation solves the problem of treating low-concentration ammonia nitrogen wastewater from nuclear power plants, achieving efficient ammonia nitrogen removal and resin regeneration, meeting environmental protection requirements, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER DESIGN COMPANY
- Filing Date
- 2025-05-14
- Publication Date
- 2026-06-26
AI Technical Summary
Direct discharge of low-concentration ammonia nitrogen wastewater from nuclear power plants can have a negative impact on the environment, easily causing regional environmental problems and eutrophication of water bodies, which are difficult to treat effectively with existing technologies.
A combined system of ammonia nitrogen adsorption unit, regeneration unit and treatment unit is adopted. Ammonia nitrogen is adsorbed by cation exchange resin, the resin is regenerated by regenerating acid solution, and chlorination oxidation treatment is combined to achieve deep removal of ammonia nitrogen.
It effectively reduces the concentration of ammonia nitrogen in wastewater to safe discharge standards, extends the service life of resin, reduces treatment costs, reduces waste, and ensures that water quality meets environmental protection requirements.
Smart Images
Figure CN224411568U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wastewater treatment technology, and in particular provides an ammonia nitrogen wastewater treatment system. Background Technology
[0002] Currently, nuclear power plants generate low-concentration ammonia nitrogen wastewater with a concentration of about 10 mg / L during operation. Direct discharge of this wastewater can have a negative impact on the environment, easily causing regional environmental problems and leading to eutrophication of algae in the water.
[0003] In order to meet the requirements of environmental protection and alleviate the increasingly prominent environmental problems, there is an urgent need for a system that can treat low-concentration ammonia nitrogen wastewater. Utility Model Content
[0004] The purpose of this application is to provide an ammonia nitrogen wastewater treatment system, which aims to solve the problem of treating low-concentration ammonia nitrogen wastewater generated during the operation of existing nuclear power plants.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0006] Some embodiments of this application provide an ammonia nitrogen wastewater treatment system, including:
[0007] An ammonia nitrogen adsorption unit includes an exchanger filled with cation exchange resin, and the exchanger is provided with an inlet, a first outlet, a regenerated acid inlet, and a second outlet.
[0008] The regeneration unit includes a metering tank and a fluid conveying device. The metering tank contains regenerated acid solution and has an outlet. The outlet is connected to the regenerated acid solution inlet via the fluid conveying device.
[0009] The treatment unit includes a neutralization tank, which is provided with an inlet, a chlorination port and a drain port. The inlet is connected to the second outlet, and the chlorination port is used to add a chlorine-containing oxidant into the neutralization tank.
[0010] In some embodiments, the fluid delivery device is a Venturi ejector, which has a first inlet, a second inlet, and a jet outlet. The first inlet is used to connect to a pure water delivery pipeline, the second inlet is connected to the liquid outlet, and the jet outlet is connected to the regenerated acid inlet.
[0011] In some embodiments, a concentration sensor is provided between the injection outlet and the regenerated acid inlet.
[0012] In some embodiments, the fluid delivery device is a first pump.
[0013] In some embodiments, the metering tank is further provided with a liquid inlet, and a liquid level sensor is connected to the metering tank.
[0014] In some embodiments, the inlet and the first outlet are located on the side of the exchanger, and the inlet is higher than the first outlet.
[0015] In some embodiments, the regenerated acid inlet is located at the bottom of the exchanger, and the second outlet is located at the top of the exchanger.
[0016] In some embodiments, the exchanger is capsule-shaped or cylindrical.
[0017] In some embodiments, the drain outlet is connected to a second pump.
[0018] In some embodiments, the neutralization tank is further provided with an exhaust port.
[0019] The beneficial effects of the ammonia nitrogen wastewater treatment system provided in this application are as follows: Compared with the prior art, this application, by setting up an ammonia nitrogen adsorption unit, a regeneration unit, and a treatment unit, can realize the regeneration and reuse of cation exchange resin, extend the service life of the resin, reduce treatment costs, and reduce the generation of waste; and by adopting a comprehensive treatment method such as adsorption, regeneration, and chlorination oxidation, the concentration of ammonia nitrogen in wastewater can be effectively reduced to below the safe discharge standard, and the treated water quality can be ensured to meet the requirements of environmental protection. Attached Figure Description
[0020] 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.
[0021] Figure 1 This is a structural block diagram of the ammonia nitrogen wastewater treatment system provided in the embodiments of this application;
[0022] Figure 2 This is a schematic diagram of the ammonia nitrogen wastewater treatment system provided in the embodiments of this application.
[0023] The following are the labeling elements in the figure:
[0024] 100. Ammonia nitrogen adsorption unit;
[0025] 101. Exchanger; 102. Inlet; 103. First outlet; 104. Regenerated acid inlet;
[0026] 105. Second water outlet; 106. Inlet pipe; 107. First outlet pipe;
[0027] 108. Regenerated acid delivery pipeline; 109. Second outlet water pipeline;
[0028] 200. Regeneration Unit;
[0029] 201. Metering tank; 202. Fluid conveying equipment; 203. Liquid outlet; 204. First inlet;
[0030] 205. Second inlet; 206. Jet outlet; 207. Pure water delivery pipeline; 208. Concentration sensor;
[0031] 209. Liquid inlet; 210. Liquid level sensor; 211. Liquid inlet pipeline;
[0032] 300. Processing unit;
[0033] 301. Neutralization tank; 302. Inlet; 303. Chlorination port; 304. Drain; 305. Chlorination pipeline;
[0034] 306. Drainage pipe; 307. Second pump; 308. Exhaust port; 309. Exhaust pipe. Detailed Implementation
[0035] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0036] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0037] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0038] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0039] Nuclear power plants generate low-concentration ammonia nitrogen wastewater during operation. Direct discharge of this wastewater can have negative environmental impacts, easily causing regional environmental problems and eutrophication of algae in water bodies. Therefore, the ammonia nitrogen wastewater treatment system provided in this application aims to effectively remove ammonia nitrogen from the wastewater, ensuring that the treated water meets discharge standards and preventing environmental pollution.
[0040] In some embodiments, refer to Figure 1 and Figure 2 As shown, this application provides an ammonia nitrogen wastewater treatment system, including: an ammonia nitrogen adsorption unit 100, a regeneration unit 200, and a treatment unit 300. The ammonia nitrogen adsorption unit 100 includes an exchanger 101 filled with cation exchange resin, and the exchanger 101 has an inlet 102, a first outlet 103, a regenerated acid inlet 104, and a second outlet 105. The regeneration unit 200 includes a metering tank 201 and a fluid conveying device 202. The metering tank 201 contains regenerated acid and has an outlet 203 connected to the regenerated acid inlet 104 via the fluid conveying device 202. The treatment unit 300 includes a neutralization tank 301, which has an inlet 302, a chlorination port 303, and a drainage port 304. The inlet 302 is connected to the second outlet 105, and the chlorination port 303 is used to add a chlorine-containing oxidant to the neutralization tank 301.
[0041] The core component of the ammonia nitrogen adsorption unit 100 is the exchanger 101 filled with cation exchange resin, which is mainly used to adsorb ammonia nitrogen in ammonia nitrogen wastewater. The exchanger 101 is provided with an inlet 102, a first outlet 103, a regenerated acid inlet 104, and a second outlet 105. The inlet 102 can be connected to the inlet pipe 106 for inputting ammonia nitrogen wastewater into the exchanger 101. The first outlet 103 can be connected to the first outlet pipe 107 for discharging the treated wastewater from the exchanger 101. The regenerated acid inlet 104 can be connected to the outlet 203 of the metering tank 201 via the regenerated acid conveying pipe 108 for conveying the regenerated acid in the metering tank 201 to the exchanger 101. The second outlet 105 can be connected to the inlet 302 of the neutralization tank 301 via the second outlet pipe 109 for conveying the high-concentration ammonia nitrogen regenerated wastewater generated in the exchanger 101 to the neutralization tank 301.
[0042] The regeneration unit 200 includes a metering tank 201 containing regenerated acid solution and a fluid conveying device 202 for conveying the regenerated acid solution. The fluid conveying device 202 is located in the regenerated acid solution conveying pipeline 108 and is used to convey the regenerated acid solution in the metering tank 201 to the exchanger 101 through the outlet 203 to realize the regeneration process of the cation exchange resin. The regenerated acid solution can be hydrochloric acid, sulfuric acid, etc.
[0043] The treatment unit 300 mainly includes a neutralization tank 301, which has an inlet 302, a chlorination port 303, and a drain port 304. The inlet 302 can be connected to the second outlet 105 of the exchanger 101 via a second outlet pipe 109, for receiving high-concentration ammonia nitrogen regeneration wastewater generated during the regeneration process. The chlorination port 303 can be connected to the chlorination pipe 305 for adding a chlorine-containing oxidant to the neutralization tank 301 to oxidize the high-concentration ammonia nitrogen regeneration wastewater. The drain port 304 can be connected to the drain pipe 306 for discharging the finally treated wastewater. The chlorine-containing oxidant is mainly used in the wastewater treatment process to oxidize and remove pollutants such as ammonia nitrogen from the wastewater. The chlorine-containing oxidant can be sodium hypochlorite, chlorine gas, chlorine dioxide, trichloroisocyanuric acid, sodium dichloroisocyanurate, etc.
[0044] The working principle of the ammonia nitrogen wastewater treatment system provided in the embodiments of this application is described below, which generally includes an ammonia nitrogen adsorption stage, a regeneration stage, and a treatment stage.
[0045] Ammonia nitrogen adsorption stage: Low-concentration ammonia nitrogen wastewater enters the exchanger 101 through inlet 102. Under normal operating conditions, the active groups (such as sulfonic acid groups or carboxylic acid groups) in the cation exchange resin within the exchanger 101 adsorb ammonium ions from the wastewater onto the resin, while simultaneously releasing an equal amount of hydrogen ions into the water. Ammonia nitrogen in the wastewater is removed through ion exchange. The treated wastewater is then discharged through the first outlet 103 or reused.
[0046] Regeneration Stage: When the cation exchange resin is saturated, the regeneration acid solution (such as hydrochloric acid) in the metering tank 201 is sent into the exchanger 101 through the outlet 203 and the regeneration acid inlet 104 via the fluid conveying device 202. Hydrogen ions in the acid solution react with ammonium ions on the cation exchange resin to decompose and remove ammonia nitrogen, restoring the resin's ion exchange adsorption capacity. During this process, the ammonium ions on the resin are replaced by hydrogen ions in the acid solution, forming high-concentration ammonia nitrogen regeneration wastewater, which is discharged through the second outlet 105.
[0047] Treatment stage: The high-concentration ammonia nitrogen regeneration wastewater discharged from the second outlet 105 flows into the neutralization tank 301 through the inlet 302. Here, the breakpoint chlorination method can be used to add a chlorine-containing oxidant (such as sodium hypochlorite) into the neutralization tank 301 through the chlorination port 303. The oxidant reacts with the ammonium ions or free ammonia in the wastewater to convert the ammonia nitrogen into harmless nitrogen gas. The treated wastewater is discharged through the outlet 304.
[0048] Therefore, the ammonia nitrogen wastewater treatment system provided in this application effectively achieves deep treatment of low-concentration ammonia nitrogen wastewater by combining steps such as adsorption, regeneration, and oxidation. This method not only effectively reduces the ammonia nitrogen content in wastewater to meet environmental protection requirements, but also improves resource utilization efficiency and reduces environmental impact through the regeneration and reuse of resin.
[0049] In some embodiments, refer to Figure 2 As shown, the fluid conveying device 202 is a Venturi ejector. The Venturi ejector is provided with a first inlet 204, a second inlet 205 and an ejection outlet 206. The first inlet 204 is used to connect to the pure water conveying pipeline 207, the second inlet 205 is connected to the liquid outlet 203, and the ejection outlet 206 is connected to the regenerated acid inlet 104.
[0050] The main principle of a Venturi ejector is based on the Venturi effect, which states that when a fluid passes through a narrow channel, its velocity increases while its pressure decreases, creating a negative pressure. This negative pressure can be used to draw in other fluids and mix them with the main fluid. Specifically, the pure water delivery pipeline 207 delivers pure water (such as demineralized water or deionized water) into the Venturi ejector through the first inlet 204. After passing through the narrow channel inside the Venturi ejector, the pure water's velocity increases significantly, creating a negative pressure. This negative pressure draws the regenerated acid solution from the metering tank 201 through the outlet 203, and then into the Venturi ejector through the second inlet 205. After mixing with the pure water, the mixture is sprayed together into the regenerated acid solution inlet 104, entering the exchanger 101.
[0051] Therefore, the Venturi ejector of this application embodiment uses the kinetic energy of pure water to drive the entire delivery process, without the need for additional power equipment (such as pumps), which saves energy and reduces the complexity and operating cost of the system.
[0052] In some embodiments, refer to Figure 2 As shown, a concentration sensor 208 is provided between the injection outlet 206 and the regenerated acid inlet 104.
[0053] Since the regenerated acid solution is mixed with pure water and sprayed through the spray outlet 206 to the regenerated acid solution inlet 104, a concentration sensor 208 is installed in the regenerated acid solution delivery pipeline 108 between the spray outlet 206 and the regenerated acid solution inlet 104 to detect the actual concentration of the mixed regenerated acid solution in real time. This is crucial for ensuring the effectiveness of resin regeneration, as both excessively high and low concentrations of the regenerated acid solution will affect the resin regeneration efficiency. The concentration sensor 208 can be a conductivity sensor, an optical sensor, etc., and this application does not impose any particular limitation on its specific type.
[0054] For example, if the concentration sensor 208 detects that the concentration of the regenerated acid solution is too high, the regenerated acid solution can be diluted by increasing the flow rate of pure water; conversely, if the concentration is too low, the flow rate of pure water can be reduced or the input amount of the regenerated acid solution can be increased.
[0055] Therefore, by introducing a concentration sensor 208, this embodiment of the application helps to achieve precise control of the concentration of the regenerated acid solution, thereby effectively improving the regeneration effect of the cation exchange resin and extending the service life of the resin.
[0056] In some embodiments, the fluid delivery device 202 may also be a first pump.
[0057] The first pump is connected in the regenerated acid delivery pipeline 108 between the outlet 203 of the metering tank 201 and the regenerated acid inlet 104 of the exchanger 101. It provides power to deliver the regenerated acid from the metering tank 201 into the exchanger 101 for resin regeneration. This method does not rely on the negative pressure generated by pure water as in the previous embodiment to draw in the regenerated acid; instead, it relies on the power provided by the pump to directly drive the liquid flow.
[0058] The embodiments of this application employ a pump delivery method, which can precisely control the flow rate of the regenerated acid solution by adjusting its rotation speed, thereby better meeting different regeneration needs. This method can ensure a stable and accurate supply of regenerated acid solution under different operating conditions.
[0059] In some embodiments, refer to Figure 2 As shown, the metering box 201 is also provided with a liquid inlet 209, and a liquid level sensor 210 is connected to the metering box 201.
[0060] The inlet 209 is used to supply regenerated acid solution into the metering tank 201. The level sensor 210 is used to detect the amount of regenerated acid solution in the metering tank 201 in real time. This is crucial for ensuring the continuity and stability of the resin regeneration process, because insufficient regenerated acid solution will directly affect the resin regeneration effect.
[0061] Optionally, an alarm can also be installed on the metering tank 201. When the level of the regenerated acid solution drops to the set value, the alarm can be triggered to send an alarm signal, reminding the operator to replenish the regenerated acid solution in time to prevent system shutdown or regeneration failure due to low liquid level.
[0062] Alternatively, the inlet 209 can be connected to the inlet pipe 211, which is connected to an external source of regenerated acid (such as a storage tank). A pump and valve can be installed in the inlet pipe 211. When the level sensor 210 detects that the level of the regenerated acid is lower than the set value, the pump and valve will be automatically turned on to replenish the regenerated acid into the metering tank 201.
[0063] Therefore, through the above design, the embodiments of this application can effectively ensure a sufficient supply of regenerated acid in the metering tank 201, thereby ensuring the smooth progress of the resin regeneration process and improving the reliability and efficiency of the entire wastewater treatment system.
[0064] In some embodiments, refer to Figure 2 As shown, the inlet 102 and the first outlet 103 are located on the side of the exchanger 101, and the inlet 102 is higher than the first outlet 103.
[0065] Because the inlet 102 is located at the top and the first outlet 103 is located at the bottom, the ammonia nitrogen wastewater will naturally flow downwards under the influence of gravity after entering the exchanger 101. This design utilizes gravity to help the wastewater distribute evenly and pass through the cation exchange resin, thereby improving the contact effect between the wastewater and the resin.
[0066] It is understandable that if the inlet 102 and the first outlet 103 are set at the same height or in an improper position, some wastewater may flow directly out of the first outlet 103 without sufficient treatment. This embodiment of the application effectively avoids this situation by setting the inlet 102 higher than the first outlet 103, ensuring that the wastewater undergoes a complete ion exchange process.
[0067] In addition, the inlet 102 and the first outlet 103 are both located on the side of the exchanger 101, allowing operators to easily access these interfaces for routine inspection, cleaning or replacement of components.
[0068] Therefore, by providing an inlet 102 on the side of the exchanger 101 that is higher than the first outlet 103, this embodiment of the application not only helps to optimize the fluid dynamics characteristics in the wastewater treatment process and ensure sufficient contact between the wastewater and the resin, but also improves the operability and maintenance convenience of the system.
[0069] In some embodiments, refer to Figure 2 As shown, the regenerated acid inlet 104 is located at the bottom of the exchanger 101, and the second outlet 105 is located at the top of the exchanger 101.
[0070] After the regenerated acid solution enters the exchanger 101 from the bottom, it gradually undergoes an ion exchange reaction with the ammonium ions on the cation exchange resin as it moves upwards. This bottom-up flow pattern ensures sufficient contact between the regenerated acid solution and the resin, improving the desorption efficiency.
[0071] Furthermore, during the resin regeneration process, the high-concentration ammonia nitrogen regeneration wastewater that is desorbed will flow upwards with the regeneration acid liquid and eventually be discharged through the second outlet 105 at the top. Since ammonium ions are mainly concentrated at the front end of the regeneration acid liquid flow direction, this method can ensure that the high-concentration waste liquid is preferentially discharged, which facilitates subsequent centralized treatment, reduces the amount of waste liquid remaining in the exchanger 101, and provides better conditions for the next operation.
[0072] Therefore, the arrangement of the regenerated acid inlet 104 and the second outlet 105 in this embodiment can not only significantly improve the efficiency and uniformity of resin regeneration, but also effectively reduce the risk of waste liquid residue.
[0073] In some embodiments, refer to Figure 2 As shown, the shape of the exchanger 101 is either capsule-shaped or cylindrical.
[0074] The capsule-shaped or cylindrical exchanger 101 has a smooth surface and continuous curvature, which can effectively reduce local resistance and turbulence during fluid flow. This design helps to uniformly distribute the regenerated acid or wastewater inside the exchanger 101 and avoid dead zones (i.e., areas where the fluid cannot effectively reach).
[0075] Furthermore, the cylindrical or capsule-shaped design can reduce pressure loss when fluid passes through the exchanger 101. Compared to angular rectangles or other irregular shapes, this shape of the exchanger 101 allows the fluid to flow more smoothly, thereby improving the overall efficiency of the system.
[0076] In some embodiments, refer to Figure 2 As shown, the chlorination port 303 can be connected to an external chlorine-containing oxidant source (such as a storage tank) through the chlorination pipeline 305, and a chlorination pump and valve can be installed in the chlorination pipeline 305.
[0077] The valve controls the on / off state of the chlorination pipeline 305. The chlorination pump can precisely control the dosage of chlorine-containing oxidant according to actual needs, achieving quantitative dosing. This is particularly important for breakpoint chlorination, as insufficient dosage may result in incomplete oxidation of ammonia nitrogen, while excessive dosage will waste reagents and produce harmful byproducts (such as residual chlorine or chloramines). When chlorine-containing oxidant needs to be added to the neutralization tank 301 through the chlorination port 303, the chlorination pump and valve are turned on; conversely, the chlorination pump and valve are turned off.
[0078] Therefore, by installing a chlorination pump and valve at the chlorination port 303, this embodiment of the application can achieve precise control and safe addition of chlorine-containing oxidants.
[0079] In some embodiments, refer to Figure 2 As shown, the drain outlet 304 is connected to the second pump 307.
[0080] The drain outlet 304 is connected to the drain pipe 306. The second pump 307 is located in the drain pipe 306. When the water quality in the neutralization tank reaches the discharge standard, the second pump 307 can be started to discharge the treated wastewater in a timely manner, thereby improving the response speed and processing capacity of the entire system.
[0081] In some embodiments, refer to Figure 2 As shown, the neutralization tank 301 is also equipped with an exhaust port 308.
[0082] Exhaust port 308 can be connected to exhaust pipe 309. When ammonia nitrogen in ammonia nitrogen wastewater is oxidized into nitrogen gas by a chlorine-containing oxidant through breakpoint chlorination, if the nitrogen gas is not discharged in time, it will form bubbles in the wastewater, affecting subsequent treatment steps or causing poor water flow. Exhaust port 308 and exhaust pipe 309 can effectively discharge nitrogen gas, ensuring smooth treatment process.
[0083] Furthermore, the exhaust port 308 can be located at the top of the neutralization tank 301, because nitrogen gas is lighter and will naturally rise above the water surface. This design ensures that nitrogen gas can escape from the wastewater quickly and completely and be discharged through the exhaust pipe 309.
[0084] In summary, the ammonia nitrogen wastewater treatment system provided in this application adopts a comprehensive treatment method including adsorption, regeneration, and chlorination oxidation, which can effectively reduce the concentration of ammonia nitrogen in wastewater to below the safe discharge standard and ensure that the treated water quality meets the requirements of environmental protection. At the same time, it can realize the recycling of cation exchange resin, extend the service life of the resin, reduce treatment costs, and reduce the generation of waste.
[0085] The above are merely preferred embodiments of this application and are not intended to limit the embodiments of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.
Claims
1. An ammonia nitrogen wastewater treatment system, characterized by, include: An ammonia nitrogen adsorption unit includes an exchanger filled with cation exchange resin, and the exchanger is provided with an inlet, a first outlet, a regenerated acid inlet, and a second outlet. The regeneration unit includes a metering tank and a fluid conveying device. The metering tank contains regenerated acid solution and has an outlet. The outlet is connected to the regenerated acid solution inlet via the fluid conveying device. The treatment unit includes a neutralization tank, which is provided with an inlet, a chlorination port and a drain port. The inlet is connected to the second outlet, and the chlorination port is used to add a chlorine-containing oxidant into the neutralization tank.
2. The ammonia nitrogen wastewater treatment system according to claim 1, characterized in that, The fluid delivery device is a Venturi ejector, which has a first inlet, a second inlet, and a jet outlet. The first inlet is used to connect to the pure water delivery pipeline, the second inlet is connected to the liquid outlet, and the jet outlet is connected to the regenerated acid inlet.
3. The ammonia nitrogen wastewater treatment system according to claim 2, characterized in that, A concentration sensor is provided between the injection outlet and the regenerated acid inlet.
4. The ammonia nitrogen wastewater treatment system according to claim 1, wherein The fluid transport device is the first pump.
5. The ammonia nitrogen wastewater treatment system according to claim 1, wherein The metering box is also equipped with a liquid inlet, and a liquid level sensor is connected to the metering box.
6. The ammonia nitrogen wastewater treatment system according to claim 1, wherein The inlet and the first outlet are located on the side of the exchanger, and the inlet is higher than the first outlet.
7. The ammonia nitrogen wastewater treatment system according to claim 1, wherein The regenerated acid inlet is located at the bottom of the exchanger, and the second outlet is located at the top of the exchanger.
8. The ammonia nitrogen wastewater treatment system according to claim 1, characterized in that, The exchanger is either capsule-shaped or cylindrical.
9. The ammonia nitrogen wastewater treatment system according to claim 1, characterized in that, The drain outlet is connected to a second pump.
10. The ammonia nitrogen wastewater treatment system according to any one of claims 1 to 9, characterized in that, The neutralization tank is also equipped with an exhaust port.