A dynamic simulation device of a power plant high-salinity wastewater treatment system

Abstract

The application discloses a kind of dynamic simulation equipment of power plant high-salinity wastewater treatment system, comprising: source water tank, ultrafiltration device, ultrafiltration water tank, activated carbon filter, circulating water tank, precision filter and reverse osmosis module communicated sequentially;The concentrated water outlet of reverse osmosis module is communicated with the water inlet of circulating water tank by concentrated water regulating valve, and the water outlet of reverse osmosis module is communicated with the water inlet of circulating water tank;Control feedback system is used to control water supply pump, pipeline valve and sensor in dynamic simulation equipment, to carry out simulation test under different working conditions, and to determine the fouling point according to the water quality change of circulating water tank.The application can carry out simulation test under different working conditions, improve the automation degree of test, and can accurately judge equipment fouling point.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a dynamic simulation device for a high-salinity wastewater treatment system in a power plant. Background Technology

[0002] In recent years, due to increasingly scarce water resources, power plants have faced severe pressure to conserve water and reduce emissions. As the system with the largest water consumption in a power plant, the circulating water system has enormous potential for water conservation and emission reduction. Currently, the desalination treatment of circulating water discharge generally adopts ultrafiltration-reverse osmosis technology. However, circulating water contains scale inhibitors and corrosion inhibitors, has high bacterial content, and high biochemical indicators, making it highly susceptible to fouling and scaling in the reverse osmosis membrane system, affecting treatment efficiency and membrane lifespan.

[0003] Most of the existing simulation test devices for this process rely on manual control, such as manually controlling the influent flow rate, resulting in a low degree of automation. Furthermore, traditional laboratory reverse osmosis devices, due to factors such as small test water volume and long test duration, find it difficult to determine scaling problems by observing minute changes in indicators such as permeate flow rate and pressure difference. Summary of the Invention

[0004] To address the above technical problems, this invention provides a dynamic simulation device for a power plant high-salt wastewater treatment system, which can conduct simulation tests under different operating conditions, improve the automation level of the test, and accurately determine the scaling points of the equipment.

[0005] This invention provides a dynamic simulation device for a high-salinity wastewater treatment system in a power plant, comprising: The system consists of a source water tank, an ultrafiltration device, an ultrafiltration product water tank, an activated carbon filter, a circulating water tank, a precision filter, and a reverse osmosis module, connected in sequence. The concentrate outlet of the reverse osmosis module is connected to the inlet of the circulating water tank via a concentrate regulating valve, and the product water outlet of the reverse osmosis module is connected to the inlet of the circulating water tank. The control feedback system is used to control the water pump, pipeline valves and sensors in the dynamic simulation equipment to conduct simulation tests under different working conditions, and to determine the scaling points based on the water quality changes in the circulating water tank.

[0006] Furthermore, the circulating water tank is equipped with a temperature control device, which includes a heating tube and a heat exchange cooling tube. The temperature control device controls the temperature through the control feedback system.

[0007] Furthermore, determining the scaling points based on changes in the water quality of the circulating water tank includes: Obtain the detected chloride ion concentration and calcium ion concentration in the circulating water tank; Based on the chloride ion concentration and the calcium ion concentration, the difference between the concentration ratio of chloride ion concentration and the concentration ratio of calcium ion concentration in the circulating water tank is calculated. If the difference is greater than or equal to a preset threshold, the dynamic simulation device is determined to have reached the scaling point.

[0008] Furthermore, an ultrafiltration water supply pump is provided between the outlet of the source water tank and the inlet of the ultrafiltration device; An activated carbon filter water supply pump is installed between the outlet of the ultrafiltration water production tank and the inlet of the activated carbon filter. A circulating water pump is installed between the outlet of the circulating water tank and the inlet of the precision filter; A reverse osmosis high-pressure water pump is installed between the outlet of the precision filter and the inlet of the reverse osmosis module.

[0009] Furthermore, the control feedback system is specifically used for: In response to the test start command, the sensor detects whether the liquid level of the test water in the source water tank is higher than the preset protection liquid level line. If so, the ultrafiltration feed water pump is turned on. When the liquid level of the ultrafiltration product water tank is detected to be higher than the preset protection liquid level line, the activated carbon filter feed water pump is turned on. When the liquid level of the circulating water tank is detected to be higher than the preset protection liquid level line, the circulating water pump and the reverse osmosis high-pressure feed water pump are turned on, so that the test water in the source water tank passes sequentially through the ultrafiltration device, the ultrafiltration product water tank, the activated carbon filter, the circulating water tank, the precision filter and the reverse osmosis module before entering the circulating water tank.

[0010] Furthermore, the control feedback system is specifically used for: During the experiment, by adjusting the frequency of the reverse osmosis high-pressure feed water pump, the opening degree of the electromagnetic regulating valve of the reverse osmosis module inlet pipe, and the opening degree of the concentrate regulating valve, the reverse osmosis module can achieve different recovery rates; and by controlling the drain valve and ball valve on the concentrate outlet pipe and the product water outlet pipe of the reverse osmosis module, the product water is discharged and the concentrate enters the circulating water tank.

[0011] Furthermore, the dynamic simulation device also includes: a cleaning water tank; the product water outlet and concentrate outlet of the reverse osmosis module are both connected to the inlet of the cleaning water tank; the outlet of the cleaning water tank is connected to the inlet of the circulating water pump.

[0012] Furthermore, the control feedback system is specifically used for: In response to the cleaning procedure command, the drain valve and ball valve on the concentrate outlet pipe and the permeate outlet pipe of the reverse osmosis module are controlled to allow the permeate and concentrate of the reverse osmosis module to enter the cleaning water tank. The circulating water pump and the reverse osmosis high-pressure feed water pump are controlled to allow the liquid in the cleaning water tank to pass through the precision filter and the reverse osmosis module before entering the cleaning water tank.

[0013] Furthermore, the inlet pipe of the reverse osmosis module is equipped with an electromagnetic regulating valve; the concentrate outlet pipe of the reverse osmosis module is equipped with the concentrate regulating valve, a ball valve and a concentrate sampling valve; and the product water outlet pipe of the reverse osmosis module is equipped with a ball valve and a product water sampling valve. The source water tank, the ultrafiltration product water tank, the circulating water tank, the cleaning water tank, and the concentrate outlet pipe and product water outlet pipe of the reverse osmosis module are all equipped with drain valves. The outlet of the circulating water pump is equipped with a circulating water tank outlet sampling valve; the outlet of the circulating water tank is equipped with a ball valve.

[0014] Furthermore, the sensors in the dynamic simulation device include: a temperature sensor, a liquid level sensor, a high temperature feedback meter, a conductivity meter, a pressure gauge, a concentrate flow meter, and a product water flow meter; The source water tank, the ultrafiltration product water tank, and the circulating water tank are all equipped with liquid level sensors; The inlet of the reverse osmosis module is equipped with a high-temperature feedback meter and a high-pressure protector; the concentrate outlet pipe of the reverse osmosis module is equipped with a pressure gauge, a concentrate flow meter and a conductivity meter; the product water outlet pipe of the reverse osmosis module is equipped with a temperature sensor, a pressure gauge, a product water flow meter and a conductivity meter. Pressure gauges are installed at the outlets of the circulating water pump, the precision filter, the reverse osmosis high-pressure water pump, and the electromagnetic regulating valve.

[0015] Compared to existing technologies, the advantages of the dynamic simulation device for a high-salinity wastewater treatment system in power plants provided by this invention are as follows: By setting up a source water tank, an ultrafiltration device, an ultrafiltration product water tank, an activated carbon filter, a circulating water tank, a precision filter, a reverse osmosis module, and a circulating water tank in sequence, the test water can return to the circulating water tank for circulation after passing through the source water tank, ultrafiltration device, ultrafiltration product water tank, activated carbon filter, circulating water tank, precision filter, and reverse osmosis module in sequence. Through continuous concentration, it can reach the test endpoint faster, improving test efficiency and saving test water. By setting up a control feedback system to control the water pumps, pipeline valves, and sensors in the device, simulation tests under different operating conditions can be carried out, improving the automation level of the test process. Furthermore, by detecting changes in the water quality in the circulating water tank, scaling points can be quickly and accurately determined. By setting up a temperature control device in the circulating water tank, the influence of water temperature on the test can be eliminated, improving the accuracy of the simulation test. By setting up a cleaning water tank, the equipment can be cleaned after the test or when scaling occurs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a dynamic simulation device for a power plant high-salt wastewater treatment system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the reverse osmosis module provided in an embodiment of the present invention; The accompanying figure is labeled as follows: 1. Source water tank; 2. Ultrafiltration unit; 3. Ultrafiltration product water tank; 4. Activated carbon filter; 5. Circulating water tank; 6. Precision filter; 7. Electromagnetic regulating valve; 8. Reverse osmosis module; 9. Concentrate regulating valve; 10. Concentrate flow meter; 11. Product water flow meter; 12. Product water sampling valve; 13. Concentrate sampling valve; 14. Cleaning water tank; 15. Circulating water tank outlet sampling valve; 16. Drain valve; 17. Ball valve; 18. Temperature control device; 19. Data transmission line; 20. Control feedback system. Detailed Implementation

[0017] The technical solutions of 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, and not all embodiments. 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.

[0018] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a dynamic simulation device for a high-salinity wastewater treatment system in a power plant, provided in an embodiment of the present invention. The dynamic simulation device for the high-salinity wastewater treatment system in a power plant includes: The following components are connected in sequence: source water tank 1, ultrafiltration device 2, ultrafiltration product water tank 3, activated carbon filter 4, circulating water tank 5, precision filter 6, and reverse osmosis module 8; the concentrate outlet of the reverse osmosis module 8 is connected to the inlet of the circulating water tank 5 via a concentrate regulating valve 9, and the product water outlet of the reverse osmosis module 8 is connected to the inlet of the circulating water tank 5. The control feedback system 20 is used to control the water supply pump, pipeline valves and sensors in the dynamic simulation equipment to conduct simulation tests under different working conditions, and to determine the scaling points based on the water quality changes in the circulating water tank 5.

[0019] Furthermore, an ultrafiltration water supply pump is provided between the outlet of the source water tank 1 and the inlet of the ultrafiltration device 2; An activated carbon filter water supply pump is installed between the outlet of the ultrafiltration water production tank 3 and the inlet of the activated carbon filter 4. A circulating water pump is installed between the outlet of the circulating water tank 5 and the inlet of the precision filter 6. A reverse osmosis high-pressure water pump is installed between the outlet of the precision filter 6 and the inlet of the reverse osmosis module 8.

[0020] Specifically, source water tank 1 is used to hold test water. When a high-salinity wastewater treatment simulation test is required, test water is injected into source water tank 1 to begin the test. The outlet of source water tank 1 is connected to the inlet of ultrafiltration device 2 via an ultrafiltration feed pump. The outlet of ultrafiltration device 2 is connected to the inlet of ultrafiltration product water tank 3. The test water enters ultrafiltration product water tank 3 after being filtered by ultrafiltration device 2. The outlet of ultrafiltration product water tank 3 is connected to the inlet of activated carbon filter 4 via an activated carbon filter feed pump. The outlet of activated carbon filter 4 is connected to the inlet of circulating water tank 5. The test water enters circulating water tank 5 after being filtered by activated carbon filter 4.

[0021] The outlet of the circulating water tank 5 is connected to the inlet of the precision filter 6 via a circulating water pump. The outlet of the precision filter 6 is connected to the inlet of the reverse osmosis module 8 via a reverse osmosis high-pressure feed pump and an electromagnetic regulating valve 7. The outlet of the reverse osmosis module 8 includes a product water outlet and a concentrate outlet. The product water outlet is connected to the inlet of the circulating water tank 5 via a product water pipe, and the concentrate outlet is connected to the circulating water tank 5 via a concentrate pipe. Therefore, the test water flows out of the circulating water tank 5, passes through the precision filter 6 and the reverse osmosis module 8, and then returns to the circulating water tank, thus requiring only a small amount of water to complete the dynamic simulation test.

[0022] Furthermore, the control feedback system 20 is connected to the control terminals of the ultrafiltration feed pump, the activated carbon filter feed pump, the circulating water pump, and the reverse osmosis high-pressure feed pump, respectively. The start and stop of each pump can be controlled through the control feedback system 20.

[0023] Furthermore, the inlet pipe of the reverse osmosis module 8 is equipped with an electromagnetic regulating valve 7; the concentrate outlet pipe of the reverse osmosis module 8 is equipped with a concentrate regulating valve 9, a ball valve 17 and a concentrate sampling valve 13; and the product water outlet pipe of the reverse osmosis module 8 is equipped with a ball valve 17 and a product water sampling valve 12. The source water tank 1, the ultrafiltration product water tank 3, the circulating water tank 5, the cleaning water tank 14, and the concentrate outlet pipe and product water outlet pipe of the reverse osmosis module 8 are all equipped with drain valves 16. The outlet of the circulating water pump is equipped with a circulating water tank outlet sampling valve 15; the outlet of the circulating water tank 5 is equipped with a ball valve 17.

[0024] Specifically, the inlet pipe of the reverse osmosis module 8 is equipped with an electromagnetic regulating valve 7. The control end of the electromagnetic regulating valve 7 is connected to the control feedback system 20. The opening degree of the electromagnetic regulating valve 7 can be controlled by the control feedback system 20, thereby adjusting the inlet water volume and inlet speed of the reverse osmosis module 8.

[0025] The concentrate outlet of the reverse osmosis module 8 is connected to the circulating water tank 5 via a concentrate pipeline. The concentrate pipeline is equipped with a concentrate regulating valve 9, a concentrate sampling valve 13, a drain valve 16, and a ball valve 17. The control terminals of these valves are all connected to a control feedback system 20, which allows for the adjustment of the valves' opening and closing. The concentrate regulating valve 9 regulates the concentrate flow rate, the concentrate sampling valve 13 samples the concentrate during the experiment, and the drain valve 16 drains the concentrate after the experiment. The reverse osmosis module 8 has two ball valves 17: one located at the inlet of the circulating water tank 5 to control the connection between the concentrate pipeline and the circulating water tank 5; and the other located at the inlet of the cleaning water tank 14 to control the connection between the concentrate pipeline and the cleaning water tank 14.

[0026] The permeate outlet of the reverse osmosis module 8 is connected to the circulating water tank 5 via a permeate pipeline. The permeate pipeline is equipped with a permeate sampling valve 12, a drain valve 16, and a ball valve 17. The control terminals of the permeate sampling valve 12, drain valve 16, and ball valve 17 are all connected to the control feedback system 20. The control feedback system 20 can adjust the opening and closing of the valves. The permeate sampling valve 12 is used to sample the permeate during the experiment, and the drain valve 16 is used to discharge the permeate. The permeate pipeline of the reverse osmosis module 8 also has two ball valves 17: one ball valve 17 is located at the inlet of the circulating water tank 5 to control the connection between the permeate pipeline and the circulating water tank 5; the other ball valve 17 is located at the inlet of the cleaning water tank 14 to control the connection between the permeate pipeline and the cleaning water tank 14.

[0027] The source water tank 1, ultrafiltration product water tank 3, circulating water tank 5, and cleaning water tank 14 are also equipped with drain valves 16 to drain the liquid from the tanks as needed for testing. A circulating water tank outlet sampling valve 15 is installed at the outlet of the circulating water pump for sampling the pump's effluent. A ball valve 17 is installed at the outlet of circulating water tank 5 to control the flow of the pipeline between circulating water tank 5 and precision filter 6.

[0028] As one optional embodiment, the sensors in the dynamic simulation device include: a temperature sensor, a liquid level sensor, a high temperature feedback meter, a conductivity meter, a pressure gauge, a concentrate flow meter 10, and a product water flow meter 11; The source water tank 1, the ultrafiltration product water tank 3, and the circulating water tank 5 are all equipped with liquid level sensors; The inlet of the reverse osmosis module 8 is equipped with a high-temperature feedback meter and a high-pressure protector; the concentrate outlet pipe of the reverse osmosis module 8 is equipped with a pressure gauge, a concentrate flow meter and a conductivity meter; the product water outlet pipe of the reverse osmosis module 8 is equipped with a temperature sensor, a pressure gauge, a product water flow meter and a conductivity meter. Pressure gauges are installed at the outlets of the circulating water pump, the precision filter 6, the reverse osmosis high-pressure water pump, and the electromagnetic regulating valve 7.

[0029] Specifically, the dynamic simulation device in this embodiment is equipped with various sensors for measuring test parameters such as temperature, liquid level, water pressure, and flow rate during the test. The sensors include a temperature sensor, a liquid level sensor, a high-temperature feedback meter, a conductivity meter, a pressure gauge, a concentrate flow meter 10, and a product water flow meter 11. All these sensors are connected to the control feedback system 20 via data transmission lines 19. The information collected by each sensor is transmitted to the control feedback system 20. The control feedback system 20 monitors and controls the test process based on the information collected by the sensors. Simultaneously, the control feedback system 20 also displays the sensor data in real time on a display screen.

[0030] The system includes level sensors (LEs) installed in various water tanks, including the source water tank 1, the ultrafiltration permeate tank 3, and the circulating water tank 5, to monitor the water level in each tank. During the experiment, the control feedback system 20 controls the start and stop of the corresponding water pumps based on the water tank levels collected by the level sensors (LEs) to ensure experimental safety. To monitor the temperature of the inlet and outlet water of the reverse osmosis module 8, a high-temperature feedback meter (HT) is installed at the inlet of the reverse osmosis module 8 to provide feedback on the inlet water temperature; a temperature sensor (T) is installed at the permeate outlet of the reverse osmosis module 8 to monitor the permeate temperature. Pressure gauges (P) and conductivity meters (σ) are installed on both the concentrate / permeate pipes of the reverse osmosis module 8. The pressure gauge measures the water pressure at the outlet of the reverse osmosis module 8, and the conductivity meter is connected at one end to the concentrate / permeate pipe and at the other end to the circulating water tank to measure the conductivity between the concentrate / permeate and the liquid in the circulating water tank. The concentrate pipeline of reverse osmosis module 8 is equipped with a concentrate flow meter 10, and the product water pipeline is equipped with a product water flow meter 11, for measuring water flow. Pressure gauges (P) are installed at the outlets of the circulating water pump, precision filter 6, reverse osmosis high-pressure feed pump, and solenoid regulating valve 7 to measure water pressure at each point. A high-pressure protector (HP) is also installed at the inlet of reverse osmosis module 8, and a low-pressure protector (LP) is installed at the outlet of precision filter 6 to ensure experimental safety.

[0031] As one optional embodiment, the circulating water tank is equipped with a temperature control device 18, which includes a heating tube and a heat exchange cooling tube. The temperature control device 18 controls the temperature through the control feedback system 20.

[0032] Specifically, the circulating water tank 5 is equipped with a temperature control device 18. The control terminal of the temperature control device 18 is connected to the control feedback system 20. The control feedback system 20 adjusts the temperature of the liquid in the circulating water tank 5 through the temperature control device 18. The temperature control device 18 includes a heating tube and a heat exchange cooling tube. When the temperature detected by the temperature sensor (T) is less than the preset first threshold, it indicates that the liquid temperature is too low and needs to be heated. Then, the heating tube of the temperature control device 18 is turned on to heat the liquid in the circulating water tank 5. When the temperature detected by the temperature sensor (T) or the high temperature feedback meter (HT) is greater than the preset second threshold, it indicates that the liquid temperature is too high and needs to be cooled. Then, the heat exchange cooling tube is turned on to cool the liquid in the circulating water tank 5, thereby eliminating the influence of water temperature on the test during the water concentration test.

[0033] The circulating water tank 5 also has a stirring and mixing function.

[0034] As one optional embodiment, the control feedback system 20 is specifically used for: In response to the test start command, the sensor detects whether the liquid level of the test water in the source water tank 1 is higher than the preset protection liquid level line. If so, the ultrafiltration feed water pump is turned on. When the liquid level of the ultrafiltration product water tank 3 is detected to be higher than the preset protection liquid level line, the activated carbon filter feed water pump is turned on. When the liquid level of the circulating water tank 5 is detected to be higher than the preset protection liquid level line, the circulating water pump and the reverse osmosis high-pressure feed water pump are turned on, so that the test water in the source water tank 1 passes sequentially through the ultrafiltration device 2, the ultrafiltration product water tank 3, the activated carbon filter 4, the circulating water tank 5, the precision filter 6, and the reverse osmosis module 8 before entering the circulating water tank 5.

[0035] Specifically, during the experiment, test water is first injected into the source water tank, and then a test start command is input to the control feedback system 20. Responding to the test start command, the control feedback system 20 first obtains the water level of the test water in the source water tank 1 via the level sensor (LE). When the water level in the source water tank 1 is higher than the preset protection level line, the ultrafiltration feed pump is activated, allowing water from the source water tank 1 to enter the ultrafiltration device 2, and then flow from the ultrafiltration device 2 into the ultrafiltration product water tank 3. The level of the test water in the ultrafiltration product water tank 3 is then obtained via the level sensor (LE). When the water level in the ultrafiltration product water tank 3 is higher than the preset protection level line, the activated carbon filter feed pump is activated, allowing the test water to flow from the ultrafiltration product water tank 3 into the activated carbon filter 4, and then from the activated carbon filter 4 into the circulating water tank 5. The control feedback system 20 then... The sensor (LE) acquires the liquid level of the test water in the circulating water tank 5. When the liquid level in the circulating water tank 5 is higher than the preset protection liquid level line, the circulating water pump and the reverse osmosis high-pressure feed water pump are turned on. The circulating water pump causes the test water in the circulating water tank 5 to enter the precision filter 6. The reverse osmosis high-pressure feed water pump causes the water flowing out of the precision filter 6 to flow into the reverse osmosis module 8 through the electromagnetic regulating valve 7. After passing through the reverse osmosis module 8, the test water returns to the circulating water tank 5 to realize the dynamic simulation of the power plant high-salt wastewater treatment system. The dynamic simulation equipment in this embodiment realizes automatic control through the feedback control system, which improves the test efficiency and avoids various problems caused by human operation.

[0036] As one optional embodiment, the control feedback system 20 is specifically used for: During the experiment, by adjusting the frequency of the reverse osmosis high-pressure feed water pump, the opening of the electromagnetic regulating valve 7 of the inlet pipe of the reverse osmosis module 8, and the opening of the concentrate regulating valve 9, the reverse osmosis module 8 can achieve different recovery rates; and by controlling the drain valve and ball valve on the concentrate outlet pipe and the product water outlet pipe of the reverse osmosis module 8, the product water is discharged and the concentrate enters the circulating water tank 5.

[0037] Specifically, in this embodiment, the recovery rate of the reverse osmosis module 8 is controlled by the reverse osmosis high-pressure feed water pump, the electromagnetic regulating valve 7, and the concentrate regulating valve 9, thereby realizing simulation tests under different operating conditions.

[0038] By adjusting the frequency of the reverse osmosis high-pressure feed water pump and the opening of the electromagnetic regulating valve 7 and the concentrate regulating valve 9, the reverse osmosis module 8 can achieve different recovery rates. The recovery rate can be determined by the ratio of the product water flow rate to the feed water flow rate recorded on the online meter. Different feed water flow rates, product water flow rates, and experimental recovery rates represent different operating conditions.

[0039] Furthermore, this embodiment employs a partial circulation method, namely, by closing the ball valve on the product water pipeline and opening the drain valve on the product water pipeline to discharge the product water, and by closing the drain valve on the concentrate pipeline and opening the ball valve at the inlet of the circulating water tank on the concentrate pipeline, the concentrate enters the circulating water tank 5. This makes the scale-forming ions in the circulating water tank more concentrated and easier to form scale, thus reaching the test endpoint faster and improving test efficiency. Moreover, the partial circulation method eliminates the need for water replenishment, requiring only a small amount of water to complete on-site simulation tests of different water qualities, saving a significant amount of test water.

[0040] Among them, the maximum theoretical recovery rate that the equipment can achieve can be estimated based on the maximum concentration ratio obtained from the static concentration ratio test, and then the recovery rate of the reverse osmosis module can be controlled based on the theoretical value, so that the test can be carried out quickly to the near scaling stage.

[0041] Further, please refer to Figure 2 , Figure 2 This is a schematic diagram of the reverse osmosis module provided in an embodiment of the present invention. The reverse osmosis module 8 includes two parts: a first-stage reverse osmosis module and a second-stage reverse osmosis module. In this embodiment of the present invention, only the first-stage reverse osmosis module can be used, or both the first-stage and second-stage reverse osmosis modules can be used simultaneously, depending on the experimental needs, to adapt to different operating conditions and to enable rapid scaling of the reverse osmosis module, such as when the recovery rate is high or the desalination rate is high.

[0042] As one optional embodiment, determining the scaling points based on the water quality changes in the circulating water tank 5 includes: Obtain the detected chloride ion concentration and calcium ion concentration of the circulating water tank 5; Based on the chloride ion concentration and the calcium ion concentration, the difference between the concentration ratio of chloride ion concentration and the concentration ratio of calcium ion concentration in the circulating water tank 5 is calculated. If the difference is greater than or equal to a preset threshold, the dynamic simulation device is determined to have reached the scaling point.

[0043] Specifically, traditional reverse osmosis test devices often struggle to determine scaling issues through indicators like permeate flow rate and pressure difference changes due to small water volume and long test durations. This embodiment determines scaling by detecting changes in the water quality of the circulating water tank 5. Specifically, it uses the difference ΔA between the concentration ratios of chloride ions and calcium ions in the circulating water tank 5 to determine scaling. A water sample is taken from the circulating water tank 5 to obtain the concentrations of chloride and calcium ions, and then the difference ΔA is calculated. If ΔA is less than a preset threshold (0.2 in this embodiment), the water sample is considered not to be scaling, and the test continues. If ΔA is greater than or equal to the preset threshold (0.2), scaling is considered to have occurred, and the test ends. This embodiment, by detecting test parameters such as pressure difference and permeate flow rate, combined with changes in water quality (ΔA), can quickly and accurately determine the scaling point. Based on the apparent recovery rate at this point, the maximum recovery rate achievable by the power plant for this water quality can be obtained.

[0044] As one optional embodiment, the dynamic simulation device further includes: a cleaning water tank 14; the product water outlet and concentrate outlet of the reverse osmosis module 8 are both connected to the inlet of the cleaning water tank 14; and the outlet of the cleaning water tank 14 is connected to the inlet of the circulating water pump.

[0045] Ball valves 17 are installed at the inlet of the cleaning water tank 14 on both the permeate and concentrate pipelines. These ball valves 17 are closed during normal testing and open when the cleaning water tank 14 is needed, allowing the permeate and concentrate from the reverse osmosis module 8 to enter the cleaning water tank 14. A ball valve is also installed at the outlet of the cleaning water tank 14. The cleaning water tank 14 is also equipped with a level sensor (LE) to monitor the water level in the cleaning water tank 14 via the control feedback system 20. The cleaning water tank 14 is also equipped with a drain valve 16 to drain the tank when necessary.

[0046] As one optional embodiment, the control feedback system 20 is specifically used for: In response to the cleaning procedure command, the drain valve and ball valve on the concentrate outlet pipe and the product water outlet pipe of the reverse osmosis module 8 are controlled to allow the product water and concentrate of the reverse osmosis module 8 to enter the cleaning water tank 14. The circulating water pump and the reverse osmosis high-pressure feed water pump are controlled to allow the liquid in the cleaning water tank 14 to pass through the precision filter 6 and the reverse osmosis module 8 before entering the cleaning water tank 14.

[0047] Specifically, after the test is completed, the reverse osmosis module 8 is cleaned through the cleaning water tank 14. The cleaning program is switched in the control feedback system 20. The cleaning program and the normal test program share the same water pump. When the equipment is scaled, the cleaning water tank can chemically clean the reverse osmosis membrane. In response to the cleaning program command, the control feedback system 20 closes the ball valves at the inlet and outlet of the circulating water tank 5 on the concentrate and product water pipelines, and opens the ball valves at the inlet and outlet of the cleaning water tank 14 on the concentrate and product water pipelines, so that the product water and concentrate of the reverse osmosis module 8 flow into the cleaning water tank 14. Then, the circulating water pump and the reverse osmosis high-pressure feed water pump are turned on. The circulating water pump causes the liquid in the cleaning water tank 14 to flow into the precision filter 6, and the reverse osmosis high-pressure feed water pump causes the liquid flowing out of the precision filter 6 to enter the reverse osmosis module 8. Finally, the product water and concentrate of the reverse osmosis module 8 return to the cleaning water tank 14 for circulation, thereby completing the equipment cleaning and avoiding scaling problems that may affect subsequent tests.

[0048] It should be noted that during the experiment, all sensors and online instruments can feed back the conductivity, flow rate, pressure pump opening, and other parameters at each point in the experimental process to the control interface. Adjusting the control feedback system 20 is sufficient to relay this feedback to the experimental procedure. If the effluent quality of any device fails to meet the influent quality requirements of the next stage, the effluent can be returned to the current device's product water tank for recirculation until it meets the standards before proceeding to the next stage. Each water supply pump outlet is equipped with a return pipe to prevent substandard experimental water from affecting subsequent stages.

[0049] This invention, through a sequentially connected configuration of a source water tank, an ultrafiltration device, an ultrafiltration product water tank, an activated carbon filter, a circulating water tank, a precision filter, and a reverse osmosis module, allows the test water to pass through these components sequentially before returning to the circulating water tank for further circulation. This continuous concentration allows the water to reach the test endpoint more quickly, improving test efficiency and conserving water. A control feedback system manages the pumps, valves, and sensors within the equipment, enabling simulation tests under different operating conditions and increasing the automation of the testing process. Furthermore, monitoring water quality changes in the circulating water tank allows for rapid and accurate identification of scaling points. A temperature control device within the circulating water tank eliminates the influence of water temperature on the test, improving the accuracy of the simulation. Finally, a cleaning water tank allows for cleaning of the equipment after the test or when scaling occurs.

[0050] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A dynamic simulation device for a high-salinity wastewater treatment system in a power plant, characterized in that, include: The system consists of a source water tank, an ultrafiltration unit, an ultrafiltration product water tank, an activated carbon filter, a circulating water tank, a precision filter, and a reverse osmosis module, connected in sequence. The concentrate outlet of the reverse osmosis module is connected to the inlet of the circulating water tank via a concentrate regulating valve, and the product water outlet of the reverse osmosis module is connected to the inlet of the circulating water tank. The control feedback system is used to control the water pump, pipeline valves and sensors in the dynamic simulation equipment to conduct simulation tests under different working conditions, and to determine the scaling points based on the water quality changes in the circulating water tank.

2. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 1, characterized in that, The circulating water tank is equipped with a temperature control device, which includes a heating element and a heat exchange cooling element. The temperature control device controls the temperature through the control feedback system.

3. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 1, characterized in that, The step of determining scaling points based on water quality changes in the circulating water tank includes: Obtain the detected chloride ion concentration and calcium ion concentration in the circulating water tank; Based on the chloride ion concentration and the calcium ion concentration, the difference between the concentration ratio of chloride ion concentration and the concentration ratio of calcium ion concentration in the circulating water tank is calculated. If the difference is greater than or equal to a preset threshold, the dynamic simulation device is determined to have reached the scaling point.

4. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 1, characterized in that, An ultrafiltration water supply pump is installed between the outlet of the source water tank and the inlet of the ultrafiltration device; An activated carbon filter water supply pump is installed between the outlet of the ultrafiltration water production tank and the inlet of the activated carbon filter. A circulating water pump is installed between the outlet of the circulating water tank and the inlet of the precision filter; A reverse osmosis high-pressure water pump is installed between the outlet of the precision filter and the inlet of the reverse osmosis module.

5. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 4, characterized in that, The control feedback system is specifically used for: In response to the test start command, the sensor detects whether the liquid level of the test water in the source water tank is higher than the preset protection liquid level line. If so, the ultrafiltration feed water pump is turned on. When the liquid level of the ultrafiltration product water tank is detected to be higher than the preset protection liquid level line, the activated carbon filter feed water pump is turned on. When the liquid level of the circulating water tank is detected to be higher than the preset protection liquid level line, the circulating water pump and the reverse osmosis high-pressure feed water pump are turned on, so that the test water in the source water tank passes sequentially through the ultrafiltration device, the ultrafiltration product water tank, the activated carbon filter, the circulating water tank, the precision filter and the reverse osmosis module before entering the circulating water tank.

6. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 5, characterized in that, The control feedback system is specifically used for: During the experiment, by adjusting the frequency of the reverse osmosis high-pressure feed water pump, the opening degree of the electromagnetic regulating valve of the reverse osmosis module inlet pipe, and the opening degree of the concentrate regulating valve, the reverse osmosis module can achieve different recovery rates; and by controlling the drain valve and ball valve on the concentrate outlet pipe and the product water outlet pipe of the reverse osmosis module, the product water is discharged and the concentrate enters the circulating water tank.

7. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 4, characterized in that, The dynamic simulation device further includes: a cleaning water tank; the product water outlet and concentrate outlet of the reverse osmosis module are both connected to the inlet of the cleaning water tank; the outlet of the cleaning water tank is connected to the inlet of the circulating water pump.

8. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 7, characterized in that, The control feedback system is specifically used for: In response to the cleaning procedure command, the drain valve and ball valve on the concentrate outlet pipe and the permeate outlet pipe of the reverse osmosis module are controlled to allow the permeate and concentrate of the reverse osmosis module to enter the cleaning water tank. The circulating water pump and the reverse osmosis high-pressure feed water pump are controlled to allow the liquid in the cleaning water tank to pass through the precision filter and the reverse osmosis module before entering the cleaning water tank.

9. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 4, characterized in that, The inlet pipe of the reverse osmosis module is equipped with an electromagnetic regulating valve; the concentrate outlet pipe of the reverse osmosis module is equipped with the concentrate regulating valve, a ball valve and a concentrate sampling valve; the product water outlet pipe of the reverse osmosis module is equipped with a ball valve and a product water sampling valve. The source water tank, the ultrafiltration product water tank, the circulating water tank, the cleaning water tank, and the concentrate outlet pipe and product water outlet pipe of the reverse osmosis module are all equipped with drain valves. The outlet of the circulating water pump is equipped with a circulating water tank outlet sampling valve; the outlet of the circulating water tank is equipped with a ball valve.

10. The dynamic simulation equipment for a power plant high-salinity wastewater treatment system as described in claim 4, characterized in that, The sensors in the dynamic simulation device include: a temperature sensor, a liquid level sensor, a high temperature feedback meter, a conductivity meter, a pressure gauge, a concentrate flow meter, and a product water flow meter; The source water tank, the ultrafiltration product water tank, and the circulating water tank are all equipped with liquid level sensors; The inlet of the reverse osmosis module is equipped with a high-temperature feedback meter and a high-pressure protector; the concentrate outlet pipe of the reverse osmosis module is equipped with a pressure gauge, a concentrate flow meter and a conductivity meter; the product water outlet pipe of the reverse osmosis module is equipped with a temperature sensor, a pressure gauge, a product water flow meter and a conductivity meter. Pressure gauges are installed at the outlets of the circulating water pump, the precision filter, the reverse osmosis high-pressure water pump, and the electromagnetic regulating valve.

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