Resin optimal configuration and pH stability control method for generator stator cooling water system

Abstract

The invention discloses a resin optimal configuration and pH stable control method for a generator stator cooling water system. The method comprises the following steps: step 1, determining a resin configuration scheme; step 2, designing a resin bed layer structure; step 3, setting pH control parameters; by optimizing resin configuration and a pH control strategy, accurate and stable control of the water quality of the generator stator cooling water system is realized, and by adopting a specific anion and cation resin ratio and a layered filling mode, the ion exchange efficiency is remarkably improved, and the service life of the resin is remarkably prolonged. And through multi-parameter cooperative control and a dynamic regulation mechanism, pH value fluctuation is effectively inhibited, and system corrosion and scaling risks are avoided. The method is easy and convenient to operate, high in automation degree and capable of meeting the water quality control requirements under different working conditions, and reliable guarantee is provided for safe and stable operation of the generator.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and more specifically to a method for optimizing resin configuration and pH stability control in generator stator cooling water systems. Background Technology

[0002] Water quality control is a key technical challenge in the operation of generator stator cooling water systems. Current technologies typically use ion exchange resins to regulate water quality, but this suffers from problems such as improper resin configuration, large pH fluctuations, and short resin lifespan. Traditional methods often employ single-bed or multi-bed resin configurations, making it difficult to simultaneously achieve good pH stability and impurity removal. Furthermore, the setting of resin regeneration cycles and pH control parameters relies heavily on experience, lacking systematic optimization methods, leading to unstable cooling water quality and impacting the safe operation of the generator. Summary of the Invention

[0003] To address this issue, the present invention provides a method for optimizing the resin configuration and pH stability control of a generator stator cooling water system. This method solves the problem that in the prior art, the setting of resin regeneration cycle and pH control parameters relies heavily on experience and lacks a systematic optimization method, resulting in unstable cooling water quality and affecting the safe operation of the generator.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for optimizing resin configuration and pH stability control in a generator stator cooling water system includes the following steps:

[0006] Step 1: Determine the resin configuration scheme: Based on the water quality requirements and operating parameters of the generator stator cooling water system, determine the type, ratio, and filling amount of ion exchange resin. The cation and anion resins are configured in proportion, and the volume ratio of cation exchange resin to anion exchange resin is 1:1.5-2.5.

[0007] Step 2, Resin bed structure design: A layered filling method is adopted, and at least two functional areas are set in the resin bed. The two functional areas include a deep purification zone and a pH stabilization zone, with the deep purification zone located upstream of the water flow and the pH stabilization zone located downstream of the water flow.

[0008] Step 3, pH control parameter setting: Based on the resin characteristics and system operating conditions, set the target pH control range to 7.0-8.5, and determine the threshold values ​​for relevant control parameters;

[0009] Step 4, Operation Monitoring and Dynamic Adjustment: Monitor the pH value, conductivity and temperature parameters of the cooling water in real time, and dynamically adjust the resin working status and system operating parameters based on the monitoring results.

[0010] Preferably, step one further includes the addition of special functional resins, which include at least one of oxygen-removing resin and antibacterial resin. The amount of oxygen-removing resin added is 3%-8% of the total resin, and the amount of antibacterial resin added is 1%-5% of the total resin. The cation exchange resin is a strongly acidic cation exchange resin with an exchange capacity of not less than 2.0 mmol / mL, and the anion exchange resin is a weakly basic anion exchange resin with an exchange capacity of not less than 1.5 mmol / mL. The total resin filling amount is determined according to the system water volume, and the filling ratio is 15%-25% of the system water volume.

[0011] Preferably, the deep purification zone in step two is filled with mixed ion exchange resin, with an anion exchange resin ratio of 1:2, and the filling height accounts for 60%-70% of the total height of the resin bed; the pH stabilization zone is filled with buffer-type ion exchange resin.

[0012] Preferably, the buffered ion exchange resin is prepared by combining a conventional ion exchange resin with a pH buffer material, wherein the pH buffer material includes at least one of bicarbonate, borate and phosphate, and the loading of the buffer material is 5%-15% of the resin mass.

[0013] Preferably, the setting of pH control parameters in step three also includes determining the temperature compensation coefficient, automatically compensating the pH measurement value according to the change in system operating temperature, with the temperature compensation coefficient being 0.003-0.005pH / ℃.

[0014] Preferably, the dynamic adjustment in step four includes determining the timing of resin regeneration and optimizing regeneration parameters. When the effluent water quality index is detected to deviate from the set range, the resin regeneration program is automatically started, and the amount of regenerant is calculated based on the resin working cycle and the trend of water quality changes.

[0015] Preferably, the determination of the resin regeneration timing is based on a comprehensive evaluation of multiple parameters, including the cumulative value of operating time, the cumulative value of treated water volume, and the trend of effluent water quality change. When any parameter reaches a set threshold, the regeneration program is triggered.

[0016] Preferably, it also includes a backup resin bed and an automatic switching device, which automatically switches to the backup resin bed when the performance of the main resin bed is detected to be degraded, and at the same time starts the regeneration program of the main resin bed.

[0017] This invention offers the following advantages: By optimizing resin configuration and pH control strategies, it achieves precise and stable control of the generator stator cooling water system. Through the use of specific anion and cation exchange resin ratios and a layered filling method, it significantly improves ion exchange efficiency and resin lifespan. Through multi-parameter synergistic control and dynamic adjustment mechanisms, it effectively suppresses pH fluctuations, avoiding the risks of system corrosion and scaling. Furthermore, this method is simple to operate, highly automated, and adaptable to water quality control requirements under different operating conditions, providing a reliable guarantee for the safe and stable operation of the generator. Attached Figure Description

[0018] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0019] Figure 1 A flowchart illustrating the method for optimizing resin configuration and pH stabilization control in a generator stator cooling water system provided in this application embodiment. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. It should be understood that these embodiments are merely for further explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Technical engineers in the field can make some non-essential improvements and adjustments to the present invention based on the above-described content. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 The method for optimizing resin configuration and pH stability control in generator stator cooling water system includes the following steps:

[0022] Step 1: Determine the resin configuration scheme: Based on the water quality requirements and operating parameters of the generator stator cooling water system, determine the type, ratio, and filling amount of ion exchange resin. The cation and anion resins are configured in proportion, and the volume ratio of cation exchange resin to anion exchange resin is 1:1.5-2.5.

[0023] Step 2, Resin bed structure design: A layered filling method is adopted, and at least two functional areas are set in the resin bed, including a deep purification zone and a pH stabilization zone. The deep purification zone is located upstream of the water flow, and the pH stabilization zone is located downstream of the water flow.

[0024] Step 3, pH control parameter setting: Based on the resin characteristics and system operating conditions, set the target pH control range to 7.0-8.5, and determine the threshold values ​​for relevant control parameters;

[0025] Step 4, Operation Monitoring and Dynamic Adjustment: Monitor the pH value, conductivity and temperature parameters of the cooling water in real time, and dynamically adjust the resin working status and system operating parameters based on the monitoring results.

[0026] In step one, the resin configuration scheme is determined by scientifically proportioning the volume ratio of anion and cation exchange resins to 1:1.5-2.5. This specific ratio fully utilizes the adsorption capacity of the anion exchange resin for acidic ions while ensuring the removal effect of the cation exchange resin for metal ions, thereby establishing a stable water quality foundation from the source and significantly extending the service life of the resin. Step two involves a functional zoning design for the resin bed structure. The deep purification zone is located upstream, efficiently removing most ionic impurities from the water, while the downstream pH stabilization zone is specifically designed for fine-tuning the pH value. This tiered treatment method makes water quality control more precise and reliable, avoiding the pH fluctuation problems that are common with traditional single-resin beds. Step three sets the pH control parameters based on the optimal range of 7.0-8.5. Within this range, it effectively prevents system pipeline corrosion and avoids the risk of scaling, providing dual protection for the safe operation of the system. Step four, operation monitoring and dynamic adjustment, establishes a complete feedback control mechanism by monitoring multiple key water quality parameters in real time. This mechanism can adjust operating parameters in a timely manner according to changes in water quality, ensuring that the system is always in the optimal working state. This dynamic adjustment mechanism greatly improves the system's adaptability, enabling it to cope with different operating conditions and water quality changes.

[0027] The preparation of cation and anion exchange resins in step one also includes the addition of special functional resins, which include at least one of oxygen-removing resin and antibacterial resin. The amount of oxygen-removing resin added is 3%-8% of the total resin, and the amount of antibacterial resin added is 1%-5% of the total resin. The cation exchange resin is a strongly acidic cation exchange resin with an exchange capacity of not less than 2.0 mmol / mL, and the anion exchange resin is a weakly basic anion exchange resin with an exchange capacity of not less than 1.5 mmol / mL. The total resin filling amount is determined according to the system water volume, and the filling ratio is 15%-25% of the system water volume.

[0028] Oxygen-removing resins effectively remove dissolved oxygen from water, preventing oxygen corrosion. An addition of 3%-8% achieves the optimal balance between economy and effectiveness. Antibacterial resins inhibit microbial growth, preventing biofouling. Strongly acidic cation exchange resins are effective at removing various cations, while weakly basic anion exchange resins are more efficient at removing weakly acidic substances such as carbon dioxide. The specific combination of these two types produces a synergistic effect. The total resin filling volume is determined by considering the relationship between the system's water volume and treatment requirements; a ratio of 15%-25% ensures sufficient ion exchange capacity without wasting equipment space.

[0029] The deep purification zone in step two is filled with mixed ion exchange resin, with a cation-anion resin ratio of 1:2, and the filling height accounts for 60%-70% of the total height of the resin bed; the pH stabilization zone is filled with buffer-type ion exchange resin, which has pH buffering properties and can maintain the pH of the effluent within the set range.

[0030] The deep purification zone uses a 1:2 ratio of cation and anion exchange resins, which provides excellent removal for various ions. The pH stabilization zone is filled with buffer-type ion exchange resin, which regulates pH. When the influent pH fluctuates, the resin in this zone stabilizes the effluent pH within a set range through ion exchange equilibrium. The height distribution of the two functional zones has been optimized; the deep purification zone occupies 60%-70% of the height, ensuring that most impurities are removed here, reducing the burden on the subsequent pH stabilization zone.

[0031] The buffered ion exchange resin is prepared by combining a conventional ion exchange resin with a pH buffering material. The pH buffering material includes at least one of bicarbonate, borate, and phosphate, and the loading of the buffering material is 5%-15% of the resin mass.

[0032] Buffering materials such as bicarbonates, borates, and phosphates can form a stable pH buffering system on the resin surface, when H+ in the water... + or OH - When the concentration changes, the buffer system maintains pH stability through chemical equilibrium. The loading rate of 5%-15% was determined through repeated experiments; too little loading results in insufficient buffering capacity, while too much loading affects the ion exchange performance of the resin.

[0033] The setting of pH control parameters in step three also includes determining the temperature compensation coefficient. The pH measurement value is automatically compensated according to the change of system operating temperature. The temperature compensation coefficient is 0.003-0.005pH / ℃.

[0034] Because pH sensor measurements are significantly affected by temperature, especially when generator load changes cause water temperature fluctuations, uncompensated pH measurements will produce significant errors. This invention employs a 0.003-0.005 pH / ℃ temperature compensation coefficient, determined based on existing temperature-pH relationship models, to achieve automatic correction of the measured values.

[0035] The dynamic adjustment mentioned in step four includes determining the timing of resin regeneration and optimizing regeneration parameters. When the effluent water quality index is detected to deviate from the set range, the resin regeneration program is automatically started. The amount of regenerant is optimized and calculated based on the resin working cycle and water quality change trend.

[0036] Traditional fixed-cycle regeneration methods often result in wasted resin capacity or untimely regeneration. This invention dynamically determines the regeneration timing based on real-time water quality monitoring data. The regeneration process is initiated when key indicators such as conductivity and pH value deviate from their expected trends. Optimization of regeneration parameters includes precise control of regenerant concentration, flow rate, and dosage. The optimal regenerant dosage is calculated based on the actual exchange capacity consumption of the resin, ensuring both regeneration effectiveness and avoiding chemical waste.

[0037] The determination of the resin regeneration timing is based on a comprehensive evaluation of multiple parameters, including the cumulative value of operating time, the cumulative value of treated water volume, and the trend of effluent water quality change. When any parameter reaches a set threshold, the regeneration program is triggered.

[0038] Judging based on a single parameter is often inaccurate. This solution combines three parameters—operating time, treated water volume, and water quality change trend—and forms a more scientific regeneration decision-making mechanism through weight allocation and threshold setting. For example, when the operating time reaches a set value (e.g., 90 days), the treated water volume accumulates to a certain threshold, or a continuous deterioration trend in effluent quality is detected, the system will automatically assess and trigger the regeneration program. This avoids misjudgments caused by an abnormality in a single parameter and ensures the accuracy of regeneration timing.

[0039] It also includes setting up a backup resin bed and an automatic switching device. When the performance of the main resin bed is detected to be declining, it automatically switches to the backup resin bed and starts the regeneration program of the main resin bed to ensure continuous and stable operation of the system.

[0040] The inclusion of a backup resin bed and an automatic switching device ensures uninterrupted system operation during the regeneration of the main resin bed. When the performance of the main resin bed is detected to drop to a set threshold, the control system automatically switches to the backup resin bed and simultaneously initiates the regeneration program for the main resin bed. Once regeneration is complete and passes inspection, the main resin bed is put into standby mode.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for optimizing resin configuration and pH stability control in a generator stator cooling water system, characterized in that, Includes the following steps: Step 1: Determine the resin configuration scheme: Based on the water quality requirements and operating parameters of the generator stator cooling water system, determine the type, ratio, and filling amount of ion exchange resin. The cation and anion resins are configured in proportion, and the volume ratio of cation exchange resin to anion exchange resin is 1:1.5-2.

5. Step 2, Resin bed structure design: A layered filling method is adopted, and at least two functional areas are set in the resin bed. The two functional areas include a deep purification zone and a pH stabilization zone, with the deep purification zone located upstream of the water flow and the pH stabilization zone located downstream of the water flow. Step 3, pH control parameter setting: Based on the resin characteristics and system operating conditions, set the target pH control range to 7.0-8.5, and determine the threshold values ​​for relevant control parameters; Step 4, Operation Monitoring and Dynamic Adjustment: Monitor the pH value, conductivity and temperature parameters of the cooling water in real time, and dynamically adjust the resin working status and system operating parameters based on the monitoring results.

2. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 1, characterized in that, Step one also includes the addition of special functional resins, which include at least one of oxygen-removing resin and antibacterial resin. The amount of oxygen-removing resin added is 3%-8% of the total resin, and the amount of antibacterial resin added is 1%-5% of the total resin. The cation exchange resin is a strongly acidic cation exchange resin with an exchange capacity of not less than 2.0 mmol / mL, and the anion exchange resin is a weakly basic anion exchange resin with an exchange capacity of not less than 1.5 mmol / mL. The total resin filling amount is determined according to the system water volume, and the filling ratio is 15%-25% of the system water volume.

3. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 1, characterized in that, The deep purification zone in step two is filled with mixed ion exchange resin, with an anion-cation resin ratio of 1:2, and the filling height accounts for 60%-70% of the total height of the resin bed; the pH stabilization zone is filled with buffer-type ion exchange resin.

4. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 3, characterized in that, The buffered ion exchange resin is prepared by combining a conventional ion exchange resin with a pH buffering material. The pH buffering material includes at least one of bicarbonate, borate, and phosphate, and the loading of the buffering material is 5%-15% of the resin mass.

5. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 1, characterized in that, The setting of pH control parameters in step three also includes determining the temperature compensation coefficient. The pH measurement value is automatically compensated according to the change of system operating temperature. The temperature compensation coefficient is 0.003-0.005pH / ℃.

6. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 1, characterized in that, The dynamic adjustment described in step four includes determining the timing of resin regeneration and optimizing regeneration parameters. When the effluent water quality index is detected to deviate from the set range, the resin regeneration program is automatically started. The amount of regenerant is calculated based on the resin working cycle and the trend of water quality changes.

7. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 6, characterized in that, The determination of the resin regeneration timing is based on a comprehensive evaluation of multiple parameters, including the cumulative value of operating time, the cumulative value of treated water volume, and the trend of effluent water quality change. When any parameter reaches a set threshold, the regeneration program is triggered.

8. The method for optimizing resin configuration and pH stability control in a generator stator cooling water system according to claim 1, characterized in that, It also includes setting up a backup resin bed and an automatic switching device. When the performance of the main resin bed is detected to be declining, it automatically switches to the backup resin bed and starts the regeneration program of the main resin bed.

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