Resin regeneration device and method based on parameter collaborative optimization

Abstract

The invention relates to the technical field of resin regeneration, in particular to a resin regeneration device and method based on parameter collaborative optimization, and the device comprises a regeneration liquid tank, a flowmeter, an acid pump, a regeneration column, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve and a seventh valve; opening a fifth valve and a seventh valve, and feeding the resin into the regeneration column; closing the fifth valve, opening the third valve and the fourth valve, and introducing demineralized water to wash the resin clean; closing the third valve, heating the regeneration liquid in the regeneration liquid tank, opening the second valve, starting the acid pump, feeding the regeneration liquid into the regeneration column, and regenerating the resin; closing the acid pump and the second valve, opening the third valve, and introducing demineralized water for flushing until the conductivity of discharged water is less than or equal to 0.2 S / cm; the seventh valve is closed, the sixth valve is opened, demineralized water is introduced to convey the resin to the outside of the regeneration column, the regeneration liquid / demineralized water is converted into laminar flow through the device, the flow speed of the regeneration liquid / demineralized water is stable, and the consumption of the regeneration liquid and the flushing demineralized water is reduced.

Description

Technical Field

[0001] This invention relates to the field of resin regeneration technology, and in particular to a resin regeneration apparatus and method based on parameter co-optimization. Background Technology

[0002] The cation exchange resin in the power plant is a key instrument for monitoring the quality of steam and water. It removes ammonia / amine from the steam and water to prevent interference with conductivity measurement, thus accurately reflecting the content levels of impurity cations and anions.

[0003] After cation exchange resins become saturated with adsorption, they need to be regenerated with a regeneration solution (2-10% hydrochloric acid or sulfuric acid) and then rinsed thoroughly with demineralized water (conductivity ≤0.2µS / cm). To achieve a high degree of regeneration, a specialized regeneration device is required for dynamic regeneration.

[0004] Conventional regeneration devices are prone to channeling, flow deviation, and resin layer disturbance, resulting in low regeneration degree, incomplete rinsing, low resin regeneration rate, high consumption of regenerated liquid and demineralized water, and long regeneration time. Summary of the Invention

[0005] The purpose of this invention is to provide a resin regeneration device and method based on parameter co-optimization, which aims to solve the problems of low resin regeneration rate, high consumption of regeneration liquid and demineralized water, and long regeneration time in conventional regeneration devices.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a resin regeneration device based on parameter collaborative optimization, comprising a regeneration liquid tank, a flow meter, an acid pump, a regeneration column, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, and a seventh valve; the first valve, the regeneration liquid tank, the flow meter, the second valve, the acid pump, and the third valve are sequentially connected; the fourth valve is connected to the acid pump, the third valve, and the regeneration column; the fifth valve is connected to the regeneration column and located on one side of the regeneration column; the sixth valve is connected to the regeneration column and located on the side of the regeneration column away from the fifth valve; and the seventh valve is connected to the regeneration column and located at the bottom of the regeneration column.

[0007] The regeneration column includes a regeneration column body, a water distribution tray, a pressure gauge, an vent nut, and a filter screen. The regeneration column body has a resin inlet and a resin outlet. The vent nut is located at the top of the regeneration column body. The pressure gauge is fixedly connected to the regeneration column body and is located on the side of the regeneration column body near the vent nut. The water distribution tray is located inside the regeneration column body near the fifth valve. The filter screen is assembled at the bottom of the regeneration column body. The resin inlet is located on the side of the regeneration column body near the fifth valve, and the resin outlet is located on the side of the regeneration column body near the sixth valve.

[0008] The regeneration liquid tank includes a tank body, a heating rod, and a thermometer. The tank body is connected to the first valve and is located on one side of the first valve. The heating rod is assembled on one side of the tank body. The thermometer is fixedly connected to the tank body and is located on the outside of the tank body.

[0009] The heating rod includes a docking plate, a supporting mesh frame, and a heating rod body. The docking plate is assembled on one side of the tank. The supporting mesh frame is fixedly connected to the docking plate and located inside the tank. The heating rod body is fixedly connected to the docking plate and located on the side of the docking plate closer to the supporting mesh frame.

[0010] The docking plate includes a docking plate and a connecting plate. The connecting plate is fixedly connected to the tank and located on one side of the tank. The docking plate is detachably connected to the connecting plate and detachably connected to the heating rod body and located on one side of the connecting plate.

[0011] The heating rod also includes a sealing ring, which is fixedly connected to the connecting plate and located on one side of the connecting plate.

[0012] In a second aspect, the present invention also provides a resin regeneration method based on parameter co-optimization, as described in the first aspect above, characterized by comprising the following steps: Open valves 5 and 7, close the remaining valves, and feed the resin into the regeneration column; Close the fifth valve, open the third and fourth valves, and introduce demineralized water to rinse the resin clean. Close the third valve, heat the regenerated liquid in the regenerated liquid tank, open the second valve, start the acid pump, adjust the seventh valve, and send the regenerated liquid into the regeneration column to regenerate the resin. Turn off the acid pump, close the second valve, open the third valve, and flush with demineralized water until the conductivity of the effluent is ≤0.2µS / cm; Close the seventh valve, open the sixth valve, and introduce demineralized water to transport the resin to the outside of the regeneration column.

[0013] This invention discloses a resin regeneration device based on parameter synergistic optimization. The device involves opening the fifth and seventh valves while closing the remaining valves to feed resin into the regeneration column. The fifth valve is then closed, and the third and fourth valves are opened to flush the resin with deionized water. The third valve is closed, and the regeneration solution in the regeneration tank is heated to 40-50°C. The second valve is opened, the acid pump is started, and the flow rate is adjusted to 5-10 m³ / h. The seventh valve is adjusted so that the pressure gauge reading is 0.05-0.15 MPa. The regeneration solution is then passed through the regeneration column to regenerate the resin for 40-60 minutes. Close the acid pump, close the second valve, open the third valve, and flush with demineralized water until the conductivity of the effluent is ≤0.2µS / cm; close the seventh valve, open the sixth valve, and flush with demineralized water to deliver the resin to the outside of the regeneration column. This device converts the regenerated liquid / demineralized water into laminar flow, achieving a uniform axial flow velocity distribution, stabilizing the flow rate of the regenerated liquid / demineralized water, improving the regeneration degree of the cation exchange resin, saving regenerated liquid and demineralized water used for flushing, reducing the amount of regenerated liquid and flushing demineralized water used, and accelerating the regeneration and flushing speed. This solves the problems of low regeneration degree, high consumption of regenerated liquid and demineralized water in conventional regeneration devices, and long regeneration time. Attached Figure Description

[0014] To make the technical solution and advantages of this application clearer, the embodiments of this application will be described in further detail below.

[0015] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0016] It should be noted that all information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in this application have been authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the strain data, acceleration data, displacement data, pressure data, and video data involved in this application were all obtained with full authorization.

[0017] Figure 1This is a connection diagram of a resin regeneration device based on parameter collaborative optimization provided by the present invention.

[0018] Figure 2 This is a schematic diagram of the heating rod structure of a resin regeneration device based on parameter collaborative optimization provided by the present invention.

[0019] Figure 3 This is a flowchart of a resin regeneration method based on parameter collaborative optimization provided by the present invention.

[0020] In the diagram: 1-Flow meter, 2-Acid pump, 3-First valve, 4-Second valve, 5-Third valve, 6-Fourth valve, 7-Fifth valve, 8-Sixth valve, 9-Seventh valve, 10-Regeneration column body, 11-Water distribution tray, 12-Pressure gauge, 13-Exhaust nut, 14-Filter screen, 15-Resin inlet, 16-Resin outlet, 17-Regeneration liquid tank, 18-Thermometer, 19-Support frame, 20-Heating rod body, 21-Diameter plate, 22-Connecting plate, 23-Sealing ring. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figures 1 to 2 In a first aspect, the present invention provides a resin regeneration device based on parameter collaborative optimization, comprising a regeneration liquid tank 17, a flow meter 1, an acid pump 2, a regeneration column, a first valve 3, a second valve 4, a third valve 5, a fourth valve 6, a fifth valve 7, a sixth valve 8, and a seventh valve 9; the first valve 3, the regeneration liquid tank 17, the flow meter 1, the second valve 4, the acid pump 2, and the third valve 5 are sequentially connected; the fourth valve 6 is connected to the acid pump 2, the third valve 5, and the regeneration column; the fifth valve 7 is connected to the regeneration column and is located on one side of the regeneration column; the sixth valve 8 is connected to the regeneration column and is located on the side of the regeneration column away from the fifth valve 7; and the seventh valve 9 is connected to the regeneration column and is located at the bottom of the regeneration column.

[0023] In this embodiment of the invention, the fifth valve 7 and the seventh valve 9 are opened, while the remaining valves are closed, and the resin is fed into the regeneration column; the fifth valve 7 is closed, and the third valve 5 and the fourth valve 6 are opened to flush the resin with deionized water; the third valve 5 is closed, and the regeneration liquid in the regeneration tank 17 is heated to 40-50°C; the second valve 4 is opened, the acid pump 2 is started, and the flow rate is adjusted to 5-10 m³ / h; the seventh valve 9 is adjusted so that the pressure gauge 12 reading is 0.05-0.15 MPa; the regeneration liquid is then fed into the regeneration column to regenerate the resin for 40-60 minutes. The acid pump 2 is shut off, the second valve 4 is closed, and the third valve 5 is opened. Demineralized water is introduced to flush the resin until the conductivity of the effluent is ≤0.2µS / cm. The seventh valve 9 is closed, and the sixth valve 8 is opened. Demineralized water is introduced to transport the resin to the outside of the regeneration column. This device converts the regenerated liquid / demineralized water into laminar flow, achieving a uniform axial flow velocity distribution, stabilizing the flow velocity of the regenerated liquid / demineralized water, saving regenerated liquid and demineralized water used for flushing, reducing the amount of regenerated liquid and flushing demineralized water used, and accelerating the regeneration and flushing speed. This solves the problems of low resin regeneration degree, high consumption of regenerated liquid and demineralized water, and long regeneration time in conventional regeneration devices.

[0024] Furthermore, the regeneration column includes a regeneration column body 10, a water distribution tray 11, a pressure gauge 12, an vent nut 13, and a filter screen 14. The regeneration column body 10 has a resin inlet 15 and a resin outlet 16. The vent nut 13 is disposed at the top of the regeneration column body 10. The pressure gauge 12 is fixedly connected to the regeneration column body 10 and is located on the side of the regeneration column body 10 near the vent nut 13. The water distribution tray 11 is disposed inside the regeneration column body 10 near the fifth valve 7. The filter screen 14 is assembled at the bottom of the regeneration column body 10. The resin inlet 15 is located on the side of the regeneration column body 10 near the fifth valve 7, and the resin outlet 16 is located on the side of the regeneration column body 10 near the sixth valve 8.

[0025] In this embodiment of the invention, the liquid inlet at the top of the regeneration column body 10 adopts a funnel-shaped structure, the interior of which is filled with inert material, and the terminal has a water distribution plate 11. The water distribution plate 11 has water outlet holes distributed on it. The water distribution plate 11 solves three major technical pain points of conventional devices: First, it eliminates channeling and deflection, improving the uniformity of regeneration. Conventional regeneration devices often use "flat round holes" or "simple screens" for water distribution, which are prone to "channeling" (local flow velocity is too fast, and the resin does not fully contact the regeneration liquid) or "deflection" (liquid flows towards the column wall, and the resin in the central area is not regenerated enough) in the resin layer due to uneven hole distribution and differences in liquid impact force. The water distribution plate 11, through the combined design of "buffer layer to reduce impact + conical hole to stabilize flow + uniform hole to expand coverage", controls the flow velocity deviation of the liquid entering the resin layer within ±5%. In the resin regeneration step, the contact area between the regenerated liquid and the resin is increased to nearly 100%, completely solving the problem of uneven resin regeneration in conventional equipment, where some resin is not regenerated. The resin regeneration rate can be stably maintained at over 98%. In the demineralized water rinsing step after regeneration, the problem of uneven rinsing in conventional equipment failing to reach the rinsing endpoint (effluent conductivity ≤0.2μS / cm) is completely solved, saving a significant amount of demineralized water. Secondly, the liquid flow rate is stabilized, reducing the consumption of regenerated liquid and demineralized water. After entering from the inlet (small diameter), the liquid gradually diffuses and slows down within the conical channel, eventually flowing out uniformly at an optimal flow rate of 5~10 m / h (experiments have verified that this flow rate yields the highest regenerated liquid utilization rate, and the desorption efficiency of impurity ions adsorbed by the resin reaches over 98%). Compared to the problem of large flow rate fluctuations (3~18m / h) in conventional equipment, this design reduces the amount of regenerated liquid used by more than 40% (e.g., when treating 1L of resin, conventional equipment requires 8~10L of regenerated liquid, while this equipment only requires 3.5~4.5L). At the same time, the amount of demineralized water used in the rinsing stage is also reduced by more than 40%, and the time to reach the rinsing endpoint (effluent conductivity ≤0.2μS / cm) is shortened by more than 30 minutes. Third, it protects the resin layer structure and extends resin life. The water distribution structure of conventional equipment is prone to "compacting and clumping" (affecting liquid penetration) or "dispersing and losing" (causing resin loss) due to excessive liquid impact. The "inert material buffer layer + vertical outflow design" of the water distribution plate of this invention can reduce the impact force of liquid entering the regeneration column by more than 60%, avoiding disturbance of the resin layer. At the same time, the guide protrusions on the lower surface can guide the liquid to spread evenly along the surface of the resin layer, rather than directly impacting local resin, reducing the resin breakage rate from 0.5~1% in conventional devices to below 0.2%, and increasing the number of single resin regeneration cycles from 50~60 times to 80~90 times, significantly reducing resin replacement costs.

[0026] The water distribution plate 11 and the device are coordinated and adapted to achieve parameter optimization. Firstly, in coordination with the pressure control of the regeneration column, the pressure gauge 12 at the top of the regeneration column (controlling the internal pressure of 0.05~0.15MPa) and the conical orifice structure of the water distribution plate 11 form a pressure-flow resistance synergy: when the internal pressure is within the optimal range, the flow resistance characteristics of the conical orifice ensure that the liquid flow rate is stable at 5~10m / h; if the pressure fluctuates slightly due to valve adjustment (e.g., ±0.02MPa), the expanded diameter structure of the conical orifice can achieve "flow resistance adaptive adjustment" (when the pressure increases, the flow rate increase in the channel is <8%; when the pressure decreases, the flow rate decrease is <6%), avoiding uneven liquid distribution caused by drastic changes in flow rate and ensuring the stability of the regeneration process. Secondly, in coordination with the temperature control of the regenerated liquid, the heating rod of the regenerated liquid tank 17 (controlling the regenerated liquid temperature at 40~50℃) increases the regeneration reaction rate by 25~30%, shortens the regeneration time, and reduces the amount of regenerated liquid used. III. Synergy with Valve Switching Process In the five-step process of "resin suction - pre-rinse - regeneration - final rinse - resin delivery" of the regeneration unit, the water distribution plate 11 consistently acts as a "flow stabilizer": During the pre-rinse stage (with the third valve 5 and the fourth valve 6 open), demineralized water is evenly rinsed through the water distribution plate 11 to remove surface impurities; during the regeneration stage (with the second valve 4 open and the acid pump 2 started), the regenerated liquid is evenly contacted with the resin through the water distribution plate 11 to ensure sufficient ion exchange; during the final rinse stage (with the third valve 5 open), demineralized water is quickly carried away by the residual regenerated liquid through the water distribution plate 11, shortening the rinsing time. The presence of the water distribution plate 11 ensures that the liquid flow in each process remains laminar, avoiding flow turbulence caused by valve switching and ensuring the parameter stability of the entire regeneration process.

[0027] Compared with the existing water distribution structure of resin regeneration devices, the water distribution tray has the following significant advantages: Comparison Dimensions The water distribution plate of this invention Conventional water distribution structure (flat plate with round holes / screen) Uniformity of liquid distribution Flow velocity deviation within ±5%, contact area ≥95%. Flow velocity deviation ±20% or more, contact area ≤75%. Regenerated liquid utilization rate Increase by 20-25% Low utilization rate and serious waste Resin protective effect Breakage rate ≤ 0.2%, number of cycles 80~90 times Crushing rate 0.5-1%, number of cycles 50-60 Adaptability Co-optimization with pressure and temperature parameters Without collaborative design, parameter fluctuations have a significant impact. Corrosion resistance and lifespan Polytetrafluoroethylene (PTFE), lifespan ≥ 5 years PVC, lifespan 1-2 years ; The vent nut 13 is used to remove air from the regeneration column body 10. The pressure gauge 12 and the seventh valve 9 control the pressure inside the regeneration column body 10 to be 0.05~0.15MPa. The filter screen 14 has a pore size of ≤0.3mm to prevent resin from escaping. The resin inlet 15 is used for resin to enter the regeneration column body 10, and the resin outlet 16 is used for resin to exit the regeneration column body 10.

[0028] Furthermore, the regeneration liquid tank 17 includes a tank body 17, a heating rod and a thermometer 18. The tank body 17 is connected to the first valve 3 and is located on one side of the first valve 3. The heating rod is assembled on one side of the tank body 17. The thermometer 18 is fixedly connected to the tank body 17 and is located on the outside of the tank body 17.

[0029] In this embodiment of the invention, the tank 17 is used to store the regenerated liquid, the heating rod is used to heat the regenerated liquid to 40~50°C, and the temperature gauge 18 is used to display the temperature of the regenerated liquid in the tank 17 in real time.

[0030] Furthermore, the heating rod includes a docking plate 21, a support frame 19, and a heating rod body 20. The docking plate 21 is assembled on one side of the groove 17. The support frame 19 is fixedly connected to the docking plate 21 and is located inside the groove 17. The heating rod body 20 is fixedly connected to the docking plate 21 and is located on the side of the docking plate 21 close to the support frame 19.

[0031] In this embodiment of the invention, the docking plate 21 is used to install and fix the heating rod body 20 in the tank 17, the support frame 19 is used to support the heating rod body 20, and the heating rod body 20 is used to heat the regeneration liquid.

[0032] Furthermore, the docking plate 21 includes a docking plate 21 and a connecting plate 22. The connecting plate 22 is fixedly connected to the tank 17 and is located on one side of the tank 17. The docking plate 21 is detachably connected to the connecting plate 22 and is detachably connected to the heating rod body 20 and is located on one side of the connecting plate 22.

[0033] In this embodiment of the invention, the connecting plate 22 is welded and fixed to the tank 17 and is detachably connected to the docking plate 21 by bolts, thereby fixing the docking plate 21 to the tank 17, that is, assembling the heating rod body 20 inside the tank 17.

[0034] Furthermore, the heating rod also includes a sealing ring 23, which is fixedly connected to the connecting plate 22 and located on one side of the connecting plate 22.

[0035] In this embodiment of the invention, the sealing ring 23 is a metal sealing ring, which is used to enhance the airtightness of the connection between the docking plate 21 and the connecting plate 22, and prevent the regeneration liquid in the tank 17 from flowing out from the gap at the connection between the docking plate 21 and the connecting plate 22.

[0036] Please see Figure 3 Secondly, the present invention also provides a resin regeneration method based on parameter co-optimization, as described in the first aspect above, characterized by comprising the following steps: S1 opens the fifth valve 7 and the seventh valve 9, and closes the other valves to send the resin into the regeneration column; S2 closes the fifth valve 7, opens the third valve 5 and the fourth valve 6, and introduces demineralized water to rinse the resin clean. S3 closes the third valve 5, heats the regenerated liquid in the regenerated liquid tank 17, opens the second valve 4, starts the acid pump 2, adjusts the seventh valve 9, and sends the regenerated liquid into the regeneration column to regenerate the resin. In this embodiment of the invention, the third valve 5 is closed, the regenerated liquid in the regenerated liquid tank 17 is heated to 40~50℃, the second valve 4 is opened, the acid pump 2 is started, the flow rate is adjusted to 5~10m / h, and the seventh valve 9 is adjusted so that the pressure gauge 12 reads 0.05~0.15MPa for 40~60min.

[0037] S4. Close acid pump 2, close second valve 4, open third valve 5, and flush with demineralized water until the conductivity of the effluent is ≤0.2µS / cm; S5. Close seventh valve 9, open sixth valve 8, and flush with demineralized water to deliver the resin to the outside of the regeneration column.

[0038] The above-disclosed embodiments are merely preferred embodiments of a resin regeneration apparatus and method based on parameter co-optimization of this application, and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A resin regeneration device based on parameter co-optimization, characterized in that, It includes a regeneration tank, a flow meter, an acid pump, a regeneration column, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, and a seventh valve; The first valve, the regeneration liquid tank, the flow meter, the second valve, the acid pump, and the third valve are connected in sequence. The fourth valve is connected to the acid pump, the third valve, and the regeneration column. The fifth valve is connected to the regeneration column and is located on one side of the regeneration column. The sixth valve is connected to the regeneration column and is located on the side of the regeneration column away from the fifth valve. The seventh valve is connected to the regeneration column and is located at the bottom of the regeneration column.

2. The resin regeneration device based on parameter co-optimization as described in claim 1, characterized in that, The regeneration column includes a regeneration column body, a water distribution tray, a pressure gauge, an exhaust nut, and a filter screen. The regeneration column body has a resin inlet and a resin outlet. The vent nut is located at the top of the regeneration column body. The pressure gauge is fixedly connected to the regeneration column body and is located on the side of the regeneration column body near the vent nut. The water distribution plate is located in the regeneration column body near the fifth valve. The filter screen is assembled at the bottom of the regeneration column body. The resin inlet is located in the regeneration column body near the fifth valve. The resin outlet is located in the regeneration column body near the sixth valve.

3. The resin regeneration device based on parameter co-optimization as described in claim 1, characterized in that, The regeneration liquid tank includes a tank body, a heating rod, and a thermometer. The tank body is connected to the first valve and is located on one side of the first valve. The heating rod is assembled on one side of the tank body. The thermometer is fixedly connected to the tank body and is located on the outside of the tank body.

4. The resin regeneration device based on parameter co-optimization as described in claim 3, characterized in that, The heating rod includes a docking plate, a support frame, and a heating rod body. The docking plate is assembled on one side of the tank. The support frame is fixedly connected to the docking plate and located inside the tank. The heating rod body is fixedly connected to the docking plate and located on the side of the docking plate close to the support frame.

5. The resin regeneration device based on parameter co-optimization as described in claim 4, characterized in that, The docking plate includes a docking plate and a connecting plate. The connecting plate is fixedly connected to the tank and located on one side of the tank. The docking plate is detachably connected to the connecting plate and detachably connected to the heating rod body and located on one side of the connecting plate.

6. The resin regeneration device based on parameter co-optimization as described in claim 5, characterized in that, The heating rod also includes a sealing ring, which is fixedly connected to the connecting plate and located on one side of the connecting plate.

7. A resin regeneration method based on parameter co-optimization, and a resin regeneration apparatus based on parameter co-optimization as described in any one of claims 1-6, characterized in that, Includes the following steps: Open valves 5 and 7, close the remaining valves, and feed the resin into the regeneration column; Close the fifth valve, open the third and fourth valves, and introduce demineralized water to rinse the resin clean. Close the third valve, heat the regenerated liquid in the regenerated liquid tank, open the second valve, start the acid pump, adjust the seventh valve, and send the regenerated liquid into the regeneration column to regenerate the resin. Turn off the acid pump, close the second valve, open the third valve, and flush with demineralized water until the conductivity of the effluent is ≤0.2µS / cm; Close the seventh valve, open the sixth valve, and introduce demineralized water to transport the resin to the outside of the regeneration column.

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