Circulating water chloride ion linkage water replenishing adjusting device and method in electric power and iron and steel industry

Abstract

The invention discloses an electric power steel industry circulating water chloride ion linkage water supplementing adjusting device and a control method thereof.The electric power steel industry circulating water chloride ion linkage water supplementing adjusting device comprises a water circulation loop, an industrial water supplementing loop, a first chloride ion monitoring branch and a second chloride ion monitoring branch, and a water outlet of the industrial water supplementing loop is connected with a water supplementing opening of a water cooling tower of the water circulation loop; the first chloride ion monitoring branch is connected with the industrial water replenishing loop, and the second chloride ion monitoring branch is connected with the water circulation loop. The method can stably operate in a high suspended matter water quality environment, realizes rapid and accurate adjustment of the water supplementing amount only through a chloride ion single parameter, simplifies the control logic, reduces the field operation and maintenance difficulty, is adaptive to modification of existing equipment of typical systems such as heat-engine plant condenser circulating water and iron and steel plant blast furnace cooling water, and is high in practicability.

Description

Technical Field

[0001] This invention relates to a linkage water replenishment and regulation device and method, particularly a linkage water replenishment and regulation device and method for chloride ion in circulating water in the power and steel industries, belonging to the field of industrial circulating treatment technology. Background Technology

[0002] The circulating water systems in the power and steel industries are characterized by large fluctuations in the quality of makeup water, high content of suspended solids in circulating water, and large system flow. Chloride ion concentration is a core indicator affecting equipment corrosion. Copper tubes of condensers in thermal power plants and cooling walls of blast furnaces in steel plants are extremely prone to pitting corrosion due to excessive chloride ions, causing unplanned equipment shutdowns.

[0003] In existing technologies, multiple parameters such as temperature, concentration ratio, and pH value need to be coupled to calculate the water replenishment volume, resulting in complex control logic that is not suitable for the operating habits of on-site maintenance personnel in the power / steel industry. At the same time, the probes of existing online chloride ion meters are directly exposed to circulating water with high suspended solids, making them easily covered by iron oxides, silt, etc., leading to data drift and reduced adjustment accuracy. In addition, conventional electric regulating valves are prone to sudden flow changes during high-flow water replenishment, causing significant fluctuations in the water level of the circulating water tower pool, which affects the condenser vacuum or the stability of the blast furnace cooling water pressure.

[0004] For the special operating conditions of the power / steel industry, the existing solution that relies solely on chloride ion concentration to adjust the water replenishment volume cannot meet the water quality requirements of circulating water due to the lack of supporting designs for dedicated pretreatment, anti-pollution monitoring, and stable flow regulation. Furthermore, there is currently no chloride ion-linked water replenishment regulation device optimized for the operating conditions of this industry. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a device and method for regulating chloride ion linkage in circulating water systems of the power and steel industries, which solves the technical problems of low chloride ion monitoring accuracy, delayed water replenishment response, and unstable system operation under high suspended solids and high hardness water conditions in the circulating water systems of the power / steel industries.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry includes a water circulation loop, an industrial water replenishment loop, a first chloride ion monitoring branch, and a second chloride ion monitoring branch. The outlet of the industrial water replenishment loop is connected to the water replenishment port of the cooling tower in the water circulation loop. The first chloride ion monitoring branch is connected to the industrial water replenishment loop, and the second chloride ion monitoring branch is connected to the water circulation loop.

[0008] Furthermore, the water circulation loop includes a cooling tower, a primary inlet valve of the circulating water pump, a secondary inlet valve of the circulating water pump, a circulating water pump, a circulating water pump outlet valve, a circulating water pump outlet check valve, a condenser inlet manual valve, a condenser inlet bypass, a condenser inlet filter, a condenser inlet electric valve, a condenser, a condenser outlet valve, an outlet valve for the condenser return water filtration device, a condenser return water filtration device, and an inlet valve for the condenser return water filtration device. The outlet of the cooling tower is connected to one end of the primary inlet valve of the circulating water pump, the other end of the primary inlet valve of the circulating water pump is connected to one end of the secondary inlet valve of the circulating water pump, the other end of the secondary inlet valve of the circulating water pump is connected to one end of the circulating water pump, the other end of the circulating water pump is connected to one end of the circulating water pump outlet valve, the other end of the circulating water pump outlet valve is connected to one end of the circulating water pump outlet check valve, and the other end of the circulating water pump outlet check valve... One end is connected to one end of the condenser inlet manual valve; the other end of the condenser inlet manual valve is connected to one end of the condenser inlet water bypass and one end of the condenser inlet water filter; the other end of the condenser inlet water bypass is connected to one end of the condenser inlet water filter and one end of the condenser inlet electric valve; the other end of the condenser inlet electric valve is connected to one end of the condenser; the other end of the condenser is connected to one end of the condenser outlet valve; the other end of the condenser outlet valve is connected to one end of the condenser return water filter inlet valve and one end of the upper inlet of the cooling tower; the other end of the condenser return water filter inlet valve is connected to one end of the condenser return water filter; the other end of the condenser return water filter inlet valve is connected to one end of the condenser return water filter outlet valve; and the other end of the condenser return water filter outlet valve is connected to the lower inlet of the cooling tower and the second chloride ion monitoring branch.

[0009] Furthermore, the second chloride ion monitoring branch includes a second chloride ion monitoring unit, a second chloride ion monitoring unit inlet electric regulating valve, a second chloride ion monitoring unit inlet manual valve, and a second chloride ion monitoring unit drainage ditch. One end of the second chloride ion monitoring unit inlet manual valve is connected to the other end of the outlet valve of the condenser return water filter device. The other end of the second chloride ion monitoring unit inlet manual valve is connected to one end of the second chloride ion monitoring unit inlet electric regulating valve. The other end of the second chloride ion monitoring unit inlet electric regulating valve is connected to the inlet of the second chloride ion monitoring unit. The outlet of the second chloride ion monitoring unit is connected to the second chloride ion monitoring unit drainage ditch.

[0010] Furthermore, the industrial water supply circuit includes a filter unit, an industrial water supply bypass, an industrial water supply pressure regulating valve, an industrial water supply pressure gauge, an industrial water supply manual valve, an industrial water supply electric regulating valve, a check valve, and a water supply flow meter. One end of the filter unit is connected to one end of the industrial water supply bypass, and the other end of the filter unit is connected to the other end of the industrial water supply bypass and one end of the industrial water supply pressure regulating valve. The other end of the industrial water supply pressure regulating valve is connected to one end of the industrial water supply pressure gauge, one end of the industrial water supply manual valve, and one end of the first chloride ion monitoring branch. The other end of the industrial water supply manual valve is connected to one end of the industrial water supply electric regulating valve, the other end of the industrial water supply electric regulating valve is connected to one end of the check valve, the other end of the check valve is connected to one end of the water supply flow meter, and the other end of the water supply flow meter is connected to the water supply port of the cooling tower.

[0011] Furthermore, the first chloride ion monitoring branch includes a manual inlet valve for the first chloride ion monitoring unit, an electric inlet regulating valve for the first chloride ion monitoring unit, a first chloride ion monitoring unit, and a drainage ditch for the first chloride ion monitoring unit. One end of the manual inlet valve for the first chloride ion monitoring unit is connected to the other end of the industrial water supply and pressure stabilizing valve. The other end of the manual inlet valve for the first chloride ion monitoring unit is connected to one end of the electric inlet regulating valve for the first chloride ion monitoring unit. The other end of the electric inlet regulating valve for the first chloride ion monitoring unit is connected to the inlet of the first chloride ion monitoring unit. The outlet of the first chloride ion monitoring unit is connected to the drainage ditch for the first chloride ion monitoring unit.

[0012] Furthermore, an industrial water supply flow buffer component is provided inside the water inlet of the cooling tower.

[0013] Furthermore, the filtration unit includes a pre-filter, a pleated filter cartridge, and a pressure regulating valve arranged in sequence.

[0014] Furthermore, the first chloride ion monitoring unit includes a soft water tank, a manual valve for replenishing soft water pipes, an electric valve for replenishing soft water pipes, an air pipe for the soft water tank, an overflow pipe for the soft water tank, a drain valve for the soft water tank, an inlet valve for the electrode cleaning pump, an electrode cleaning pump, an outlet valve for the electrode cleaning pump, an outlet check valve for the electrode cleaning pump, an overflow pipe for the electrode flow tank, a drain valve for the electrode flow tank, an electrode cleaning device, a chloride ion electrode, and an electrode flow tank. One end of the manual valve for replenishing soft water pipes is connected to softened water, and the other end of the manual valve is connected to one end of the electric valve for replenishing soft water pipes. The other end of the electric valve is connected to the inlet of the soft water tank. The air pipe for the soft water tank is located at the upper end of the soft water tank. One end of the overflow pipe for the soft water tank is connected to the overflow port of the soft water tank, and one end of the drain valve for the soft water tank is connected to the drain port of the soft water tank. The other end of the overflow pipe of the soft water tank is connected to the other end of the soft water tank drain valve and the drainage ditch. One end of the electrode cleaning pump inlet valve is connected to the outlet of the soft water tank. The other end of the electrode cleaning pump inlet valve is connected to one end of the electrode cleaning pump. The other end of the electrode cleaning pump is connected to one end of the electrode cleaning pump outlet valve. The other end of the electrode cleaning pump outlet valve is connected to one end of the electrode cleaning pump outlet check valve. The other end of the electrode cleaning pump outlet check valve is connected to the inlet of the electrode flow tank. The electrode cleaning device and the chloride ion electrode are set in the electrode flow tank. One end of the electrode flow tank overflow pipe is connected to the overflow port of the electrode flow tank. One end of the electrode flow tank drain valve is connected to the drain port of the electrode flow tank. The other end of the electrode flow tank overflow pipe is connected to the other end of the electrode flow tank drain valve and the drainage ditch.

[0015] Furthermore, the electrode cleaning device includes an annular distribution pipe and several arc-shaped nozzles. The annular distribution pipe is located at the bottom of the electrode flow pool. The arc-shaped nozzles are arranged in an arc shape and bend outward along the radial direction of the chloride ion electrode. One end of the arc-shaped nozzle is connected to the annular distribution pipe, and several arc-shaped nozzles are evenly distributed along the circumference of the annular distribution pipe. Multiple nozzles are provided on the side of the arc-shaped nozzle facing the chloride ion electrode.

[0016] A control method for a chloride ion-linked water replenishment and regulation device for circulating water in the power and steel industries includes the following steps: Through real-time data feedback from the first and second chloride ion monitoring units, the PLC control module executes the power / steel industry-specific adjustment logic to accurately match the water replenishment flow rate with the chloride ion concentration requirements, ultimately ensuring that the chloride ion concentration in the circulating water remains stable within the preset threshold range. The core formula for coordinated regulation is: Q 补 × C 补 + Q 循原 × C 循原 = (Q 补 + Q 循原 - Q 损 ) × C循目标 Among them, Q 补 It is the real-time flow rate of the water supply pipeline, C 补 It refers to the real-time chloride ion concentration during water replenishment, Q. 循原 It is the original circulating flow rate of the circulating water system, C 循原 Q is the original chloride ion concentration in the circulating water. 损 It is the flow loss of the circulating water system, C 循目标 It is the preset threshold for chloride ions in circulating water; The PLC control module acquires Q data in real time. 补 C 补 C 循原 The data is substituted into the above formula to dynamically calculate the required water replenishment adjustment amount, which is then converted into an opening adjustment command for the electric water replenishment regulating valve, thereby achieving precise linkage between chloride ion concentration deviation and water replenishment compensation. After the power and steel industry circulating water chloride ion linkage water replenishment and regulation device is started, the user selects the application scenario through the PLC touch screen. The PLC automatically loads the corresponding preset threshold and enters the original basic parameters of the circulating water system to complete the initialization. The first chloride ion monitoring unit monitors the chloride ion concentration (C) in real time in the pre-treated water supply pipeline. 补 The data is synchronously transmitted to the PLC control module; the real-time flow rate Q of the water supply flow meter is synchronously collected. 补 The second chloride ion monitoring unit is installed on the filter branch of the circulating water pump outlet in the main circulating water pipeline to monitor the chloride ion concentration (C) in the circulating water in real time. 循原 The data is fed back to the PLC control module in real time; both monitoring units clean the detection probes regularly through self-cleaning components to ensure that the detection accuracy of C supplement and C return is ≤±5mg / L. The PLC control module will detect the C ion from the second chloride ion monitoring unit. 循原 With preset threshold C 循目标 The comparison is performed to generate a concentration deviation value ΔC, where ΔC = C 循原 - C 循目标 Based on the absolute value and sign of the concentration deviation ΔC, and combined with the C supplementary data, a graded adjustment logic is executed: When ΔC = 0, the PLC maintains the current opening of the electric water supply regulating valve and continuously monitors the data; When ΔC>0, the PLC calculates the total amount of chloride ions that need to be reduced, ΔM = (Q). 补 + Q 循原 - Q 损 ) × ΔC, and then derive the required increase in water replenishment ΔQ. 补 = ΔM / (C 循目标 - C 补 ), and ΔQ 补This is converted into the opening increment of the electric water supply regulating valve; When ΔC < 0, the PLC calculates the required reduction in water supply ΔQ. 补 = |ΔM| / (C 补 - C 循目标 This is converted into a reduction in the opening of the electric water supply regulating valve, thus avoiding excessive water supply and water waste. When C 补 If the water level rises abnormally, the PLC will automatically issue a warning signal and reduce the opening of the electric water supply regulating valve to ensure that the circulating water quality does not exceed the limit. When the detection value of the second chloride ion monitoring unit changes abruptly, the PLC will activate the flow buffer logic to limit the rate of change of the opening of the electric water supply regulating valve to ≤5% / s, and work with the flow buffer component to prevent the water level of the circulating water tower pool from fluctuating by more than ±5cm. After receiving a command from the PLC, the electric water supply regulating valve adjusts its opening, with a response time of ≤10s. After adjustment, the first and second chloride ion monitoring units continuously collect data, and the PLC recalculates ΔC every 2s to correct the valve opening. If the corrected ΔC ≤ ±10mg / L, maintain the current opening degree; If ΔC > ±10mg / L, repeat the above calculation and adjustment steps until the chloride ion concentration in the circulating water is stable within the range of C target ±10mg / L; In automatic mode, the PLC continuously executes the above linkage logic, stores ≥1 year of operating data, and supports data traceability and operating condition analysis. In manual mode, the user can directly set the opening of the electric water supply regulating valve via the touch display. The PLC still monitors the chloride ion concentration in real time. 循原 When the concentration exceeds the threshold by ±20 mg / L, an audible and visual alarm will be automatically triggered to remind the user to switch to automatic mode or adjust manually. When any monitoring unit fails, the PLC automatically switches to emergency water replenishment mode, controls the valve opening according to a preset fixed flow rate, and simultaneously alarms to prompt maintenance, ensuring the continuous operation of the circulating water system.

[0017] Compared with the prior art, the present invention has the following advantages and effects: 1. This invention is suitable for various industry conditions: targeting the characteristics of high suspended solids and large flow in the power / steel industry, the pretreatment, monitoring and regulation components are optimized to solve the problems of low accuracy and poor stability of existing technologies when applied in this industry. It can directly modify existing circulating water systems without replacing core equipment. 2. This invention simplifies operation and maintenance: It achieves automatic adjustment by relying on only the single parameter of chloride ions, eliminating the complex logic of multi-parameter coupling, conforming to the operating habits of on-site operation and maintenance personnel, and reducing labor costs; 3. This invention improves operational stability: the self-cleaning component ensures monitoring accuracy, and the flow buffer component controls water level fluctuations to ≤±5cm, effectively avoiding problems such as condenser vacuum fluctuations in thermal power plants and unstable cooling water pressure in steel plants. 4. This invention reduces the risk of equipment corrosion: By stably controlling the chloride ion concentration in circulating water within the industry's safe threshold, practical application has verified that it can reduce the corrosion rate of condensers in thermal power plants by 35%, reduce the pitting corrosion rate of blast furnace cooling walls in steel plants by 40%, and extend the service life of equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry according to the present invention.

[0019] Figure 2 This is a schematic diagram of the chloride ion monitoring unit of the present invention.

[0020] Figure 3 This is a schematic diagram of the electrode cleaning device of the present invention. Detailed Implementation

[0021] To illustrate in detail the technical solutions adopted by the present invention to achieve the intended technical objectives, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Furthermore, the technical means or technical features in the embodiments of the present invention can be replaced without creative effort. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, the present invention provides a circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry, comprising a water circulation loop, an industrial water replenishment loop, a first chloride ion monitoring branch, and a second chloride ion monitoring branch. The outlet of the industrial water replenishment loop is connected to the water replenishment port of the cooling tower in the water circulation loop, the first chloride ion monitoring branch is connected to the industrial water replenishment loop, and the second chloride ion monitoring branch is connected to the water circulation loop.

[0023] The water circulation loop includes a cooling tower 1, a circulating water pump inlet primary valve 2, a circulating water pump inlet secondary valve 3, a circulating water pump 4, a circulating water pump outlet valve 5, a circulating water pump outlet check valve 6, a condenser inlet manual valve 7, a condenser inlet bypass 8, a condenser inlet water filter 9, a condenser inlet electric valve 10, a condenser 11, a condenser outlet valve 12, a condenser return water section filter outlet valve 13, a condenser return water section filter device 14, and a condenser return water section filter device inlet valve 15. The outlet of the cooling tower 1 is connected to one end of the circulating water pump inlet primary valve 2. The other end of the circulating water pump inlet primary valve 2 is connected to one end of the circulating water pump inlet secondary valve 3. The other end of the circulating water pump inlet secondary valve 3 is connected to one end of the circulating water pump 4. The other end of the circulating water pump 4 is connected to one end of the circulating water pump outlet valve 5. The other end of the circulating water pump outlet valve 5 is connected to one end of the circulating water pump outlet check valve 6. The other end of the circulating water pump outlet check valve 6 is connected to the condenser inlet manual valve 7. One end of the condenser inlet manual valve 7 is connected to the condenser inlet bypass 8 and the condenser inlet filter 9. The other end of the condenser inlet bypass 8 is connected to the condenser inlet filter 9 and the condenser inlet electric valve 10. The other end of the condenser inlet electric valve 10 is connected to the condenser 11. The other end of the condenser 11 is connected to the condenser outlet valve 12. The other end of the condenser outlet valve 12... One end is connected to one end of the inlet valve 15 of the condenser return water filter device and the upper inlet of the cooling tower 1. The other end of the inlet valve 15 of the condenser return water filter device is connected to one end of the condenser return water filter device 14. The other end of the condenser return water filter device 14 is connected to one end of the outlet valve 13 of the condenser return water filter device. The other end of the outlet valve 13 of the condenser return water filter device is connected to the lower inlet of the cooling tower 1 and the second chloride ion monitoring branch.

[0024] The second chloride ion monitoring branch includes a second chloride ion monitoring unit 16, a second chloride ion monitoring unit inlet electric regulating valve 17, a second chloride ion monitoring unit inlet manual valve 18, and a second chloride ion monitoring unit drainage ditch 19. One end of the second chloride ion monitoring unit inlet manual valve 18 is connected to the other end of the outlet valve 13 of the condenser return water filter device. The other end of the second chloride ion monitoring unit inlet manual valve 18 is connected to one end of the second chloride ion monitoring unit inlet electric regulating valve 17. The other end of the second chloride ion monitoring unit inlet electric regulating valve 17 is connected to the inlet of the second chloride ion monitoring unit 16. The outlet of the second chloride ion monitoring unit 16 is connected to the second chloride ion monitoring unit drainage ditch 19.

[0025] The industrial water supply circuit includes a filter unit 20, an industrial water supply bypass 21, an industrial water supply pressure stabilizing valve 22, an industrial water supply pressure gauge 23, an industrial water supply manual valve 24, an industrial water supply electric regulating valve 25, a check valve 26, and a water supply flow meter 27. One end of the filter unit 20 is connected to one end of the industrial water supply bypass 21, and the other end of the filter unit 20 is connected to the other end of the industrial water supply bypass 21 and one end of the industrial water supply pressure stabilizing valve 22. The other end of the industrial water supply pressure stabilizing valve 22 is connected to one end of the industrial water supply pressure gauge 23, one end of the industrial water supply manual valve 24, and one end of the first chloride ion monitoring branch. The other end of the industrial water supply manual valve 24 is connected to one end of the industrial water supply electric regulating valve 25, the other end of the industrial water supply electric regulating valve 25 is connected to one end of the check valve 26, the other end of the check valve 26 is connected to one end of the water supply flow meter 27, and the other end of the water supply flow meter 27 is connected to the water supply port of the cooling tower 1.

[0026] The first chloride ion monitoring branch includes a manual inlet valve 28 for the first chloride ion monitoring unit, an electric inlet regulating valve 29 for the first chloride ion monitoring unit, a first chloride ion monitoring unit 30, and a drainage ditch 31 for the first chloride ion monitoring unit. One end of the manual inlet valve 28 for the first chloride ion monitoring unit is connected to the other end of the industrial water supply and pressure stabilizing valve 22. The other end of the manual inlet valve 28 for the first chloride ion monitoring unit is connected to one end of the electric inlet regulating valve 29 for the first chloride ion monitoring unit. The other end of the electric inlet regulating valve 29 for the first chloride ion monitoring unit is connected to the inlet of the first chloride ion monitoring unit 30. The outlet of the first chloride ion monitoring unit 30 is connected to the drainage ditch 31 for the first chloride ion monitoring unit.

[0027] An industrial water supply flow buffer assembly 32 is installed inside the water supply inlet of cooling tower 1.

[0028] The filtration unit 20 comprises a pre-filter, a pleated cartridge filter, and a pressure regulating valve arranged sequentially. The pre-filter features a built-in 50-mesh stainless steel screen to quickly intercept large suspended particles and employs a quick-opening flange design for easy screen replacement every 30 days. The pleated cartridge filter further filters finer impurities with a 10μm precision. Its built-in backwash port is PLC-controlled, automatically backwashing every 24 hours. The pressure regulating valve stabilizes the water supply pressure at 0.2-0.6MPa, effectively handling on-site pressure fluctuations.

[0029] like Figure 2As shown, the first chloride ion monitoring unit includes a soft water tank 33, a soft water pipe manual water supply valve 34, a soft water pipe electric water supply valve 35, a soft water tank air pipe 36, a soft water tank overflow pipe 37, a soft water tank drain valve 38, an electrode cleaning pump inlet valve 39, an electrode cleaning pump 40, an electrode cleaning pump outlet valve 41, an electrode cleaning pump outlet check valve 42, an electrode flow tank overflow pipe 43, an electrode flow tank drain valve 44, and an electrode cleaning device 45. The system includes a chloride ion electrode 46 and an electrode flow cell 47. One end of a manual water supply valve 34 is connected to softened water, and the other end is connected to one end of an electric water supply valve 35. The other end of the electric water supply valve 35 is connected to the inlet of the soft water tank 33. An air pipe 36 is located at the top of the soft water tank 33. One end of an overflow pipe 37 is connected to the overflow port of the soft water tank 33. One end of a drain valve 38 is connected to the soft water tank 33. The drain outlet of 3 is connected, the other end of the overflow pipe 37 of the soft water tank is connected to the other end of the drain valve 38 of the soft water tank and the drainage ditch, one end of the inlet valve 39 of the electrode cleaning pump is connected to the outlet of the soft water tank 33, the other end of the inlet valve 39 of the electrode cleaning pump is connected to one end of the electrode cleaning pump 40, the other end of the electrode cleaning pump 40 is connected to one end of the outlet valve 41 of the electrode cleaning pump, the other end of the outlet valve 41 of the electrode cleaning pump is connected to one end of the outlet check valve 42 of the electrode cleaning pump, the other end of the outlet check valve 42 of the electrode cleaning pump is connected to the inlet of the electrode flow pool 47, the electrode cleaning device 45 and the chloride ion electrode 46 are set in the electrode flow pool 47, one end of the overflow pipe 43 of the electrode flow pool is connected to the overflow port of the electrode flow pool 47, one end of the drain valve 44 of the electrode flow pool is connected to the drain port of the electrode flow pool 47, and the other end of the overflow pipe 43 of the electrode flow pool is connected to the other end of the drain valve 44 of the electrode flow pool and the drainage ditch. A DN8 inlet pipe is led from the filter pipeline to the bottom of the electrode flow tank. The water sample enters the electrode flow tank, passes through the electrodes, and is discharged from the top of the flow tank. The antifouling membrane electrode monitors the chloride ion concentration of the circulating water in real time. The PLC control module receives concentration data from the first and second chloride ion monitoring units and calculates the concentration based on the preset chloride ion threshold for thermal power plants / steel plants. When the chloride ion concentration of the circulating water is higher than the threshold, the PLC automatically adjusts the opening of valve 11 (electric water supply regulating valve) with a response time of ≤10 seconds, and dilutes the circulating water concentration by supplementing it with pretreated water with low chloride ion concentration.

[0030] like Figure 3As shown, the electrode cleaning device includes an annular distribution pipe 48 and several arc-shaped nozzles 49. The annular distribution pipe 48 is located at the bottom of the electrode flow tank 47. The arc-shaped nozzles 49 are arranged in an arc shape and bend outward along the radial direction of the chloride ion electrode 46. One end of the arc-shaped nozzles 49 is connected to the annular distribution pipe 48, and several arc-shaped nozzles 49 are evenly distributed along the circumference of the annular distribution pipe 48. Multiple nozzles are provided on the side of the arc-shaped nozzles 49 facing the chloride ion electrode 46. This design ensures that the water flow can cover the electrode surface 360° in all directions, without any dead corners. The angle and orifice diameter of the nozzles are optimized to form a uniform fan-shaped or conical water curtain, so that the rinsing water gently washes the electrode surface with appropriate pressure and flow rate, ensuring the cleaning effect while avoiding damage to the electrode membrane due to excessive impact force. When the system triggers the cleaning program, the rinsing water (usually pretreated demineralized water or process softened water) enters the device from the inlet pipe and is distributed to each nozzle through the curved tube bundle to form a uniform rinsing water flow. Water flows down the electrode surface, thoroughly carrying away dirt, salt crystals, and air bubbles attached to the electrode, and finally discharges through the outlet pipe.

[0031] Softened water enters the soft water tank 33 through the manual valve 34 and the electric valve 35, with the level gauge monitoring the water level in real time. When the level falls below a preset value, the PLC triggers an audible and visual alarm, prompting the replenishment of softened pure water with a conductivity ≤50μS / cm. The system automatically starts cleaning according to a preset 2-hour cycle, or in case of abnormal electrode impedance, it starts in an emergency. The PLC sequentially opens the electrode cleaning pump inlet valve 39 and the electrode cleaning pump outlet valve 41, starting the electrode cleaning pump 40. The softened pure water is pressurized to 0.3-0.4MPa by the pump and, through the arc-shaped spray pipe and nozzle of the electrode cleaning device 45, uniformly rinses the chloride ion electrode 46 in 360°, removing surface contaminants. The cleaning wastewater is discharged through the electrode flow tank drain valve 44, and the electrode flow tank overflow pipe 43 maintains a stable liquid level in the flow tank. After each cleaning cycle lasts 30-60 seconds, the valves are closed sequentially, the pump stops running, and the system returns to monitoring mode.

[0032] The advantages of this design are: 1. Uniform cleaning: The circumferentially symmetrical layout of the curved tube bundle and nozzle ensures that the rinsing intensity is consistent at all points on the electrode surface, avoiding the problem of incomplete cleaning in certain areas.

[0033] 2. Electrode protection: The gentle water flow design and non-contact rinsing effectively protect the delicate electrode sensitive membrane and extend the electrode's service life.

[0034] 3. Automated operation: It can be linked with the system's control unit to achieve timed automatic cleaning or triggered cleaning based on parameters such as electrode impedance and response time, without the need for manual intervention.

[0035] 4. Easy maintenance: The modular tube bundle and nozzle design makes the disassembly, inspection and maintenance of the device very convenient, and the replacement of parts can be completed quickly.

[0036] Core function: This device ensures that the online chloride ion electrode is always in optimal working condition through continuous and stable cleaning, thereby providing accurate and reliable water quality data for the process. It is a key auxiliary unit to ensure the long-term stable operation of the entire online analysis system.

[0037] A control method for a chloride ion-linked water replenishment and regulation device for circulating water in the power and steel industries includes the following steps: Through real-time data feedback from the first and second chloride ion monitoring units, the PLC control module executes the power / steel industry-specific adjustment logic to accurately match the water replenishment flow rate with the chloride ion concentration requirements, ultimately ensuring that the chloride ion concentration in the circulating water remains stable within the preset threshold range. The core formula for coordinated regulation is: Q 补 × C 补 + Q 循原 × C 循原 = (Q 补 + Q 循原 - Q 损 ) × C 循目标 Among them, Q 补 It is the real-time flow rate of the water supply pipeline, C 补 It refers to the real-time chloride ion concentration during water replenishment, Q. 循原 It is the original circulating flow rate of the circulating water system, C 循原 Q is the original chloride ion concentration in the circulating water. 损 It is the flow loss of the circulating water system, C 循目标 It is the preset threshold for chloride ions in circulating water; The PLC control module acquires Q data in real time. 补 C 补 C 循原 The data is substituted into the above formula to dynamically calculate the required water replenishment adjustment amount, which is then converted into an opening adjustment command for the electric water replenishment regulating valve, thereby achieving precise linkage between chloride ion concentration deviation and water replenishment compensation.

[0038] After the circulating water chloride ion linkage water replenishment and regulation device in the power and steel industries is activated, the user selects the application scenario (thermal power plant / steel plant) via the PLC touch screen. The PLC automatically loads the corresponding preset thresholds: for example, the chloride ion threshold for circulating water in a thermal power plant is set to ≤500mg / L, and the chloride ion threshold for blast furnace cooling water in a steel plant is set to ≤600mg / L. At the same time, the original circulating flow rate Q of the circulating water system is entered. 循原 Initialize basic parameters such as system loss rate.

[0039] The first chloride ion monitoring unit monitors the chloride ion concentration (C) in real time in the pre-treated water supply pipeline. 补 The detection frequency is once every 2 seconds, and the data is synchronously transmitted to the PLC control module; the real-time flow rate Q of the water supply flow meter is also synchronously collected. 补 The data update frequency is once per second. The second chloride ion monitoring unit is installed on the filter branch at the outlet of the circulating water pump in the main circulating water pipeline to monitor the chloride ion concentration (C) in the circulating water in real time. 循原 The detection frequency is once every 2 seconds, and the data is fed back to the PLC control module in real time. Both monitoring units clean the detection probes regularly with a self-cleaning component (every 2 hours, 30-60 seconds each time) to avoid detection errors caused by scaling and contamination of the probes under high suspended solids conditions, ensuring that the detection accuracy of C supplement and C circulation is ≤ ±5mg / L.

[0040] The PLC control module will detect the C ion from the second chloride ion monitoring unit. 循原 With preset threshold C 循目标 The comparison is performed to generate a concentration deviation value ΔC, where ΔC = C 循原 - C 循目标 Based on the absolute value and sign of the concentration deviation ΔC, and combined with the C supplementary data, a graded adjustment logic is executed: When ΔC = 0 (C 循原 = C 循目标 When this occurs, the PLC maintains the current opening of the electric water supply regulating valve and continuously monitors the data; When ΔC>0 (C 循原 >C 循目标 When chloride ions exceed the standard, the PLC calculates the total amount of chloride ions that need to be reduced, ΔM = (Q). 补 +Q 循原 - Q 损 ) × ΔC, and then derive the required increase in water replenishment ΔQ. 补 = ΔM / (C 循目标 - C 补 (Because C) 补 Usually below C 循目标 (by adding low-chloride water for dilution), and ΔQ 补 This is converted into the opening increment of the electric water supply regulating valve (the opening degree is linearly related to the flow rate, with a preset calibration curve). When ΔC<0 (C 循原 <C 循目标 (Chloride ion level is low): PLC calculates the required reduction in water replenishment ΔQ. 补 = |ΔM| / (C 补 - C 循目标 This is converted into a reduction in the opening of the electric water supply regulating valve, thus avoiding excessive water supply and water waste.

[0041] Special operating condition handling: When C 补 If the concentration of chloride ions rises abnormally (e.g., exceeding 300 mg / L), the PLC will automatically issue a warning signal and reduce the opening of the electric water supply regulating valve to prioritize ensuring that the circulating water quality does not exceed the limit. When the value detected by the second chloride ion monitoring unit changes abruptly (fluctuation exceeding 50 mg / L within 10 seconds), the PLC will activate the flow buffer logic to limit the rate of change of the opening of the electric water supply regulating valve to ≤5% / s. In conjunction with the flow buffer component (buffering the flow change amplitude to ≤10%), the water level fluctuation in the circulating water tower pool will be prevented from exceeding ±5 cm.

[0042] After receiving a PLC command, the electric water supply regulating valve adjusts its opening, with a response time ≤10s (valve action delay ≤3s, flow stabilization delay ≤7s). After adjustment, the first and second chloride ion monitoring units continuously collect data, and the PLC recalculates ΔC every 2s to correct the valve opening. If the corrected ΔC ≤ ±10mg / L (allowable deviation range), maintain the current opening degree; If ΔC > ±10 mg / L, repeat the above calculation and adjustment steps until the chloride ion concentration in the circulating water stabilizes within the range of C target ±10 mg / L.

[0043] In automatic mode, the PLC continuously executes the above-mentioned linkage logic and stores ≥1 year of operating data (including C). 补 C 循原 (Parameters such as valve opening and water supply volume) support data traceability and operating condition analysis; In manual mode, the user can directly set the opening of the electric water supply regulating valve via the touch display. The PLC still monitors the chloride ion concentration in real time. 循原 When the concentration exceeds the threshold by ±20 mg / L, an audible and visual alarm will be automatically triggered to remind the user to switch to automatic mode or adjust manually. When any monitoring unit fails (such as probe damage or data interruption), the PLC automatically switches to emergency water replenishment mode, controls the valve opening according to a preset fixed flow rate (1.2 times the historical average water replenishment), and simultaneously alarms to prompt maintenance, ensuring the continuous operation of the circulating water system.

[0044] In response to the characteristics of high suspended solids, large pressure fluctuations, and complex sources of chloride ions in the power / steel industry (such as introduction by blast furnace gas washing water in steel plants and leakage from desulfurization systems in thermal power plants), the linkage control logic of this device has been specifically optimized: 1. Employ a "coarse adjustment + fine adjustment" graded control: When ΔC > 100mg / L (significantly exceeding the limit), the valve opening is quickly adjusted (maximum adjustment range 20% / time); when ΔC ≤ 100mg / L, the valve opening is finely adjusted (adjustment range ≤ 5% / time) to avoid over-adjustment leading to system oscillation; 2. Pressure compensation mechanism: The water supply pipeline stabilizes the inlet water pressure through a pressure stabilizing valve (0.2-0.6MPa). The PLC collects the water supply pressure data in real time. When the pressure fluctuation exceeds ±0.1MPa, the valve opening calculation value is automatically corrected to offset the impact of pressure changes on the water supply. 3. Anti-interference design: The PLC control module has a built-in data filtering algorithm to prevent interference from C. 补 C 循原 The detection data is processed by moving average (mean of 5 data points) to remove instantaneous interference signals under high suspended matter conditions, ensuring the accuracy of adjustment commands; 4. Operating Condition Adaptability: Addressing the frequent chloride ion fluctuations in blast furnace cooling water systems at steel plants, the PLC increases the detection frequency to once every 0.5 seconds, reducing the adjustment response time to ≤8 seconds. For the large capacity of circulating water systems in thermal power plants, the flow increment coefficient in the adjustment logic is optimized to avoid system imbalances caused by sudden changes in makeup water volume. Through the above-mentioned linkage adjustment mechanism, this device can effectively handle the complex operating conditions of circulating water systems in the power / steel industry, improving the control accuracy of circulating water chloride ion concentration to ±10 mg / L, reducing equipment corrosion rate by more than 30%, and simultaneously reducing makeup water waste, achieving the dual goals of water quality stability and energy saving.

[0045] This invention is adaptable to various industry conditions: Addressing the high suspended solids and large flow rates characteristic of the power / steel industries, it optimizes pretreatment, monitoring, and regulation components, solving the problems of low accuracy and poor stability in existing technologies used in these industries. It allows direct modification of existing circulating water systems without replacing core equipment. This invention simplifies operation and maintenance: Automatic regulation is achieved using only the chloride ion parameter, eliminating the complex logic of multi-parameter coupling, conforming to the operating habits of on-site maintenance personnel, and reducing labor costs. This invention improves operational stability: The self-cleaning component ensures monitoring accuracy, and the flow buffer component controls water level fluctuations to ≤±5cm, effectively avoiding problems such as condenser vacuum fluctuations in thermal power plants and unstable cooling water pressure in steel plants. This invention reduces equipment corrosion risk: By stably controlling the chloride ion concentration in circulating water within industry safety thresholds, practical application verification shows that it can reduce the corrosion rate of condensers in thermal power plants by 35% and the pitting corrosion rate of blast furnace cooling walls in steel plants by 40%, extending equipment service life.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A chloride ion-linked water replenishment and regulation device for circulating water in the power and steel industries, characterized in that: It includes a water circulation loop, an industrial water supply loop, a first chloride ion monitoring branch, and a second chloride ion monitoring branch. The outlet of the industrial water supply loop is connected to the water supply outlet of the cooling tower in the water circulation loop. The first chloride ion monitoring branch is connected to the industrial water supply loop, and the second chloride ion monitoring branch is connected to the water circulation loop.

2. The circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry according to claim 1, characterized in that: The water circulation loop includes a cooling tower, a primary inlet valve of the circulating water pump, a secondary inlet valve of the circulating water pump, a circulating water pump, a circulating water pump outlet valve, a circulating water pump outlet check valve, a condenser inlet manual valve, a condenser inlet bypass, a condenser inlet filter, a condenser inlet electric valve, a condenser, a condenser outlet valve, a condenser return water filter outlet valve, a condenser return water filter, and a condenser return water filter inlet valve. The outlet of the cooling tower is connected to one end of the primary inlet valve of the circulating water pump, the other end of the primary inlet valve of the circulating water pump is connected to one end of the secondary inlet valve of the circulating water pump, the other end of the secondary inlet valve of the circulating water pump is connected to one end of the circulating water pump, the other end of the circulating water pump is connected to one end of the circulating water pump outlet valve, the other end of the circulating water pump outlet valve is connected to one end of the circulating water pump outlet check valve, and the other end of the circulating water pump outlet check valve is connected to the condenser inlet manual valve. One end of the condenser inlet manual valve is connected to the condenser inlet manual valve, and the other end of the condenser inlet manual valve is connected to one end of the condenser inlet water bypass and one end of the condenser inlet water filter. The other end of the condenser inlet water bypass is connected to one end of the condenser inlet water filter and one end of the condenser inlet electric valve. The other end of the condenser inlet electric valve is connected to one end of the condenser. The other end of the condenser is connected to one end of the condenser outlet valve. The other end of the condenser outlet valve is connected to one end of the inlet valve of the condenser return water filter and the upper inlet of the cooling tower. The other end of the inlet valve of the condenser return water filter is connected to one end of the condenser return water filter. The other end of the condenser return water filter is connected to one end of the condenser return water filter outlet valve. The other end of the condenser return water filter outlet valve is connected to the lower inlet of the cooling tower and the second chloride ion monitoring branch.

3. The circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry according to claim 2, characterized in that: The second chloride ion monitoring branch includes a second chloride ion monitoring unit, a second chloride ion monitoring unit inlet electric regulating valve, a second chloride ion monitoring unit inlet manual valve, and a second chloride ion monitoring unit drainage ditch. One end of the second chloride ion monitoring unit inlet manual valve is connected to the other end of the outlet valve of the condenser return water filter device. The other end of the second chloride ion monitoring unit inlet manual valve is connected to one end of the second chloride ion monitoring unit inlet electric regulating valve. The other end of the second chloride ion monitoring unit inlet electric regulating valve is connected to the inlet of the second chloride ion monitoring unit. The outlet of the second chloride ion monitoring unit is connected to the second chloride ion monitoring unit drainage ditch.

4. The circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry according to claim 1, characterized in that: The industrial water supply circuit includes a filtration unit, an industrial water supply bypass, an industrial water supply pressure regulating valve, an industrial water supply pressure gauge, an industrial water supply manual valve, an industrial water supply electric regulating valve, a check valve, and a water supply flow meter. One end of the filtration unit is connected to one end of the industrial water supply bypass, and the other end of the filtration unit is connected to the other end of the industrial water supply bypass and one end of the industrial water supply pressure regulating valve. The other end of the industrial water supply pressure regulating valve is connected to one end of the industrial water supply pressure gauge, one end of the industrial water supply manual valve, and one end of the first chloride ion monitoring branch. The other end of the industrial water supply manual valve is connected to one end of the industrial water supply electric regulating valve, the other end of the industrial water supply electric regulating valve, and one end of the check valve. The other end of the check valve is connected to one end of the water supply flow meter, and the other end of the water supply flow meter is connected to the water supply inlet of the cooling tower.

5. A chloride ion linkage water replenishment and regulation device for circulating water in the power and steel industry according to claim 4, characterized in that: The first chloride ion monitoring branch includes a manual inlet valve for the first chloride ion monitoring unit, an electric inlet regulating valve for the first chloride ion monitoring unit, a first chloride ion monitoring unit, and a drainage ditch for the first chloride ion monitoring unit. One end of the manual inlet valve for the first chloride ion monitoring unit is connected to the other end of the industrial water supply and pressure stabilizing valve. The other end of the manual inlet valve for the first chloride ion monitoring unit is connected to one end of the electric inlet regulating valve for the first chloride ion monitoring unit. The other end of the electric inlet regulating valve for the first chloride ion monitoring unit is connected to the inlet of the first chloride ion monitoring unit. The outlet of the first chloride ion monitoring unit is connected to the drainage ditch for the first chloride ion monitoring unit.

6. A chloride ion linkage water replenishment and regulation device for circulating water in the power and steel industry according to claim 4, characterized in that: An industrial water supply flow buffer component is installed inside the water inlet of the cooling tower.

7. A chloride ion linkage water replenishment and regulation device for circulating water in the power and steel industry according to claim 4, characterized in that: The filtration unit comprises a pre-filter, a pleated filter cartridge, and a pressure regulating valve arranged in sequence.

8. A chloride ion linkage water replenishment and regulation device for circulating water in the power and steel industry according to claim 3, characterized in that: The first chloride ion monitoring unit includes a soft water tank, a manual valve for replenishing soft water pipes, an electric valve for replenishing soft water pipes, an air pipe for the soft water tank, an overflow pipe for the soft water tank, a drain valve for the soft water tank, an inlet valve for the electrode cleaning pump, an electrode cleaning pump, an outlet valve for the electrode cleaning pump, an outlet check valve for the electrode cleaning pump, an overflow pipe for the electrode flow tank, a drain valve for the electrode flow tank, an electrode cleaning device, a chloride ion electrode, and an electrode flow tank. One end of the manual valve for replenishing soft water pipes is connected to softened water, and the other end is connected to one end of the electric valve for replenishing soft water pipes. The other end of the electric valve for replenishing soft water pipes is connected to the inlet of the soft water tank. The air pipe for the soft water tank is located at the top of the soft water tank. One end of the overflow pipe for the soft water tank is connected to the overflow port of the soft water tank, and one end of the drain valve for the soft water tank is connected to the drain port of the soft water tank. The other end of the overflow pipe of the tank is connected to the other end of the drain valve of the soft water tank and the drainage ditch. One end of the inlet valve of the electrode cleaning pump is connected to the outlet of the soft water tank. The other end of the inlet valve of the electrode cleaning pump is connected to one end of the electrode cleaning pump. The other end of the electrode cleaning pump is connected to one end of the outlet valve of the electrode cleaning pump. The other end of the outlet valve of the electrode cleaning pump is connected to one end of the outlet check valve of the electrode cleaning pump. The other end of the outlet check valve of the electrode cleaning pump is connected to the inlet of the electrode flow tank. The electrode cleaning device and the chloride ion electrode are set in the electrode flow tank. One end of the overflow pipe of the electrode flow tank is connected to the overflow port of the electrode flow tank. One end of the drain valve of the electrode flow tank is connected to the drain port of the electrode flow tank. The other end of the overflow pipe of the electrode flow tank is connected to the other end of the drain valve of the electrode flow tank and the drainage ditch.

9. A chloride ion linkage water replenishment and regulation device for circulating water in the power and steel industry according to claim 8, characterized in that: The electrode cleaning device includes an annular distribution pipe and several arc-shaped nozzles. The annular distribution pipe is located at the bottom of the electrode flow pool. The arc-shaped nozzles are arranged in an arc shape and bend outward along the radial direction of the chloride ion electrode. One end of the arc-shaped nozzle is connected to the annular distribution pipe, and several arc-shaped nozzles are evenly distributed along the circumference of the annular distribution pipe. Multiple nozzles are provided on the side of the arc-shaped nozzle facing the chloride ion electrode.

10. A control method for a circulating water chloride ion linkage water replenishment and regulation device for the power and steel industry as described in any one of claims 1-9, characterized in that... Includes the following steps: Through real-time data feedback from the first and second chloride ion monitoring units, the PLC control module executes the power / steel industry-specific adjustment logic to accurately match the water replenishment flow rate with the chloride ion concentration requirements, ultimately ensuring that the chloride ion concentration in the circulating water remains stable within the preset threshold range. The core formula for coordinated regulation is: Q 补 × C 补 + Q 循原 × C 循原 = (Q 补 + Q 循原 - Q 损 ) × C 循目标 Among them, Q 补 It is the real-time flow rate of the water supply pipeline, C 补 It refers to the real-time chloride ion concentration during water replenishment, Q. 循原 It is the original circulating flow rate of the circulating water system, C 循原 Q is the original chloride ion concentration in the circulating water. 损 It is the flow loss of the circulating water system, C 循目标 It is the preset threshold for chloride ions in circulating water; The PLC control module acquires Q data in real time. 补 C 补 C 循原 The data is substituted into the above formula to dynamically calculate the required water replenishment adjustment amount, which is then converted into an opening adjustment command for the electric water replenishment regulating valve, thereby achieving precise linkage between chloride ion concentration deviation and water replenishment compensation. After the power and steel industry circulating water chloride ion linkage water replenishment and regulation device is started, the user selects the application scenario through the PLC touch screen. The PLC automatically loads the corresponding preset threshold and enters the original basic parameters of the circulating water system to complete the initialization. The first chloride ion monitoring unit monitors the chloride ion concentration (C) in real time in the pre-treated water supply pipeline. 补 The data is synchronously transmitted to the PLC control module; the real-time flow rate Q of the water supply flow meter is synchronously collected. 补 The second chloride ion monitoring unit is installed on the filter branch of the circulating water pump outlet in the main circulating water pipeline to monitor the chloride ion concentration (C) in the circulating water in real time. 循原 The data is fed back to the PLC control module in real time; both monitoring units clean the detection probes regularly through self-cleaning components to ensure that the detection accuracy of C supplement and C return is ≤±5mg / L. The PLC control module will detect the C ion from the second chloride ion monitoring unit. 循原 With preset threshold C 循目标 The comparison is performed to generate a concentration deviation value ΔC, where ΔC = C 循原 - C 循目标 Based on the absolute value and sign of the concentration deviation ΔC, and combined with the C supplementary data, a graded adjustment logic is executed: When ΔC = 0, the PLC maintains the current opening of the electric water supply regulating valve and continuously monitors the data; When ΔC>0, the PLC calculates the total amount of chloride ions that need to be reduced, ΔM = (Q). 补 + Q 循原 - Q 损 ) × ΔC, and then derive the required increase in water replenishment ΔQ. 补 = ΔM / (C 循目标 - C 补 ), and ΔQ 补 This is converted into the opening increment of the electric water supply regulating valve; When ΔC < 0, the PLC calculates the required reduction in water supply ΔQ. 补 = |ΔM| / (C 补 - C 循目标 This is converted into a reduction in the opening of the electric water supply regulating valve, thus avoiding excessive water supply and water waste. When C 补 If the water level rises abnormally, the PLC will automatically issue a warning signal and reduce the opening of the electric water supply regulating valve to ensure that the circulating water quality does not exceed the limit. When the detection value of the second chloride ion monitoring unit changes abruptly, the PLC will activate the flow buffer logic to limit the rate of change of the opening of the electric water supply regulating valve to ≤5% / s, and work with the flow buffer component to prevent the water level of the circulating water tower pool from fluctuating by more than ±5cm. After receiving a command from the PLC, the electric water supply regulating valve adjusts its opening, with a response time of ≤10s. After adjustment, the first and second chloride ion monitoring units continuously collect data, and the PLC recalculates ΔC every 2s to correct the valve opening. If the corrected ΔC ≤ ±10mg / L, maintain the current opening degree; If ΔC > ±10mg / L, repeat the above calculation and adjustment steps until the chloride ion concentration in the circulating water is stable within the range of C target ±10mg / L; In automatic mode, the PLC continuously executes the above linkage logic, stores ≥1 year of operating data, and supports data traceability and operating condition analysis. In manual mode, the user can directly set the opening of the electric water supply regulating valve via the touch display. The PLC still monitors the chloride ion concentration in real time. 循原 When the concentration exceeds the threshold by ±20 mg / L, an audible and visual alarm will be automatically triggered to remind the user to switch to automatic mode or adjust manually. When any monitoring unit fails, the PLC automatically switches to emergency water replenishment mode, controls the valve opening according to a preset fixed flow rate, and simultaneously alarms to prompt maintenance, ensuring the continuous operation of the circulating water system.

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