Safe and efficient reverse osmosis scale inhibitor dosing system

Abstract

The invention belongs to the technical field of demineralized water treatment, and provides a safe and efficient reverse osmosis scale inhibitor dosing system which comprises a metering box, a stirring pump, a dosing pump, a scale inhibitor ton barrel and a pneumatic diaphragm pump, the metering box is connected with the dosing pump through a dosing pipeline, the metering box is connected with a water source through a water supplementing pipeline, a stirring shaft of the stirring pump vertically extends into the metering box, the scale inhibitor ton barrel is connected with the pneumatic diaphragm pump through a dosing pipeline, and the pneumatic diaphragm pump is connected with the metering box through a dosing pipeline. The pneumatic diaphragm pump is also connected with an air source through an air supply pipeline; the pneumatic diaphragm pump is used for conveying the reverse osmosis scale inhibitor into the metering box, the metering box takes water from a water source through the water replenishing pipeline, the stirring pump is used for stirring the reverse osmosis scale inhibitor in the metering box with water, and the dosing pump is used for conveying the stirred agent to a reverse osmosis system. According to the scheme, safe, efficient and accurate dosing operation of the reverse osmosis scale inhibitor is realized, and application requirements of various reverse osmosis systems in the field of water treatment are met.

Description

Technical Field

[0001] This invention relates to the field of demineralized water treatment technology, and in particular to a safe and efficient reverse osmosis antiscalant dosing system. Background Technology

[0002] Reverse osmosis technology, as a core technology in the field of demineralized water treatment, is widely used in the production of boiler feedwater, chemical and industrial pure water, and has also achieved large-scale application in industries such as drinking water purification, electronics and semiconductors, pharmaceuticals and medical devices, food and beverage, and environmental protection. Its core principle utilizes the property of a semi-permeable membrane that allows water to pass through but not salt. By applying pressure greater than the osmotic pressure, the solvent in the concentrated solution flows to the dilute solution, thereby removing salt from the water and producing water with low residual salinity. Subsequent advanced treatments such as ion exchange and electro-desalination can then be combined to meet higher water quality requirements.

[0003] In practical applications, reverse osmosis systems often face membrane scaling problems during long-term operation. Metal ions such as calcium, magnesium, and iron in the water gradually crystallize on the surface of the reverse osmosis membrane, forming hard scale that clogs the membrane pores and hinders water permeation. This directly leads to decreased system output efficiency, shortened membrane lifespan, and increased equipment maintenance costs. To solve this problem, a reverse osmosis antiscalant needs to be added to the reverse osmosis system. It achieves multiple functions through chemical and physical actions: first, it prevents ion crystallization, avoiding hard scale formation; second, it cleans the small amount of scale already formed on the membrane surface, maintaining membrane cleanliness; third, it inhibits the growth of bacteria, viruses, and other microorganisms, ensuring the hygiene and safety of the membrane components; and fourth, it protects equipment components, reduces corrosion risk, and extends the overall equipment lifespan.

[0004] The core components of reverse osmosis antiscalants include corrosion inhibitors to prevent metal corrosion, ion exchangers to reduce ion concentration in water, dispersants to prevent particle aggregation, and cleaning agents to remove scale from the membrane surface. In practical applications, reverse osmosis antiscalants can pose certain health risks through contact, inhalation, or ingestion. However, existing reverse osmosis antiscalant dosing systems rely entirely on manual operation in the dosing process. Operators must carry 25kg / barrels of reverse osmosis antiscalant, manually add it from the top dosing port of the metering tank according to the dosing requirements of each individual metering tank, then add water to the designated level and stir to mix thoroughly. This traditional method is not only labor-intensive and inefficient, but also suffers from low safety and insufficient dosing accuracy, failing to meet the practical requirements of safe, efficient, and low-labor-intensity dosing operations. Summary of the Invention

[0005] This invention provides a safe and efficient reverse osmosis antiscalant dosing system to solve the shortcomings of existing reverse osmosis antiscalant dosing systems, such as high manpower consumption, low dosing efficiency, low safety, and insufficient dosing accuracy.

[0006] This invention provides a safe and efficient reverse osmosis antiscalant dosing system, comprising: a metering tank, a stirring pump, a dosing pump, an antiscalant tank, and a pneumatic diaphragm pump;

[0007] The metering tank is connected to the dosing pump via a dosing pipeline. The metering tank is also connected to a water source via a water replenishment pipeline. The stirring shaft of the stirring pump extends vertically into the interior of the metering tank. The scale inhibitor ton container is connected to the pneumatic diaphragm pump via a dispensing pipeline. The pneumatic diaphragm pump is connected to the metering tank via a replenishment pipeline. The pneumatic diaphragm pump is also connected to an air source via an air supply pipeline.

[0008] The pneumatic diaphragm pump is used to transport the reverse osmosis antiscalant in the antiscalant ton to the metering tank. The metering tank draws water from the water source through the water supply pipeline. The stirring pump is used to stir the reverse osmosis antiscalant and water in the metering tank. The dosing pump is used to transport the stirred agent to the reverse osmosis system.

[0009] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, at least one dosing valve is provided on the dosing pipeline;

[0010] The dispensing valve is located at the bottom of one side of the scale inhibitor container, and is used to control the connection and disconnection of the dispensing pipeline.

[0011] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, at least one dosing valve is provided on the dosing pipeline;

[0012] The replenishment valve is located near the top inlet of the metering box, and the replenishment valve is used to control the connection and disconnection of the replenishment pipeline.

[0013] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, at least one air supply valve is provided on the air supply pipeline;

[0014] The gas supply valve is located in the middle section of the gas supply pipeline, and the gas supply valve is used to control the connection and disconnection of the gas supply pipeline.

[0015] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, the top of the antiscalant tank is provided with an exhaust port, which is in the open state when the pneumatic diaphragm pump is turned on.

[0016] The safe and efficient reverse osmosis antiscalant dosing system provided by the present invention further includes: a liquid level sensor and a controller;

[0017] The liquid level sensor is located inside the metering tank, and the liquid level sensor, the stirring pump, the dosing pump, and the pneumatic diaphragm pump are connected to the controller;

[0018] The liquid level sensor is used to collect the measured liquid level value in the metering tank;

[0019] The controller is used to compare the measured liquid level value with a preset lower limit value, and when the measured liquid level value is detected to be lower than the lower limit value, it determines the first target replenishment amount, the first target stirring parameter, and the target dosing parameter, generates and sends a first replenishment control command to the pneumatic diaphragm pump based on the first target replenishment amount, generates and sends a first stirring control command to the stirring pump based on the first target stirring parameter, and generates and sends a dosing control command to the dosing pump based on the target dosing parameter.

[0020] The safe and efficient reverse osmosis antiscalant dosing system provided by the present invention further includes: a flow sensor;

[0021] The flow sensor is located inside the metering box and is connected to the controller.

[0022] The flow sensor is used to collect the measured inflow rate of the water in the metering tank;

[0023] The controller is also used to determine the second target dosage corresponding to the measured influent flow rate based on a pre-established correlation between influent flow rate and dosage, and to generate and issue a second dosage control command to the pneumatic diaphragm pump based on the second target dosage.

[0024] The first medicine control command has a higher command priority than the second medicine control command.

[0025] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, the controller is further configured to determine the second target stirring parameter corresponding to the measured influent flow rate based on a pre-established correlation between the influent flow rate and the stirring parameter, and generate and issue a second stirring control command to the stirring pump based on the second target stirring speed.

[0026] The first stirring control command has a higher command priority than the second stirring control command.

[0027] According to the safe and efficient reverse osmosis antiscalant dosing system provided by the present invention, at least one water supply valve is provided on the water supply pipeline, and the water supply valve is connected to the controller;

[0028] The controller is also used to compare the measured liquid level value with the preset upper limit value of the liquid level, and when it is detected that the measured liquid level value is higher than the upper limit value of the liquid level, generate and issue a stop operation command to the pneumatic diaphragm pump and the stirring pump, and control the water supply valve to close.

[0029] The safe and efficient reverse osmosis antiscalant dosing system provided by the present invention further includes an audible and visual alarm connected to the controller.

[0030] The controller is also used to generate and send an abnormal liquid level warning signal to the audible and visual alarm when the measured liquid level value is detected to be lower than the lower limit or higher than the upper limit.

[0031] The audible and visual alarm is used to provide audible and visual warnings upon receiving the abnormal liquid level warning signal.

[0032] This invention provides a safe and efficient reverse osmosis antiscalant dosing system. By configuring an antiscalant tank and a pneumatic diaphragm pump, it forms a highly efficient dosing system in conjunction with existing core equipment. Using a tank to hold the antiscalant significantly reduces the workload of handling smaller tanks. Combined with the automatic delivery function of the pneumatic diaphragm pump, it avoids direct contact between operators and the antiscalant, improving the safety of the dosing process. Automatic water replenishment and mixing of the agent are achieved through a water supply line and a stirring pump. The dosing pump accurately delivers the agent to the reverse osmosis system, ensuring the accuracy and stability of the agent ratio and improving dosing efficiency. This helps protect the reverse osmosis membrane, extend equipment operating time, and improve effluent quality. It achieves safe, efficient, and precise reverse osmosis antiscalant dosing operation and is suitable for the application needs of various reverse osmosis systems in the water treatment field. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram illustrating the principle of the osmosis process;

[0035] Figure 2 This is a schematic diagram illustrating the principle of the reverse osmosis process;

[0036] Figure 3 This is a schematic diagram of the structure of the safe and efficient reverse osmosis antiscalant dosing system provided in the embodiments of the present invention;

[0037] Figure 4 This is a schematic diagram showing the connection relationships of electrical components in a safe and efficient reverse osmosis antiscalant dosing system. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0039] like Figure 1 As shown, equal volumes of a dilute solution (such as fresh water) and a concentrated solution (such as seawater or salt water) are placed on opposite sides of a container, separated by a semipermeable membrane. The solvent in the dilute solution will naturally pass through the membrane to the concentrated solution side; this process is called osmosis. The liquid level on the concentrated solution side will be higher than that on the dilute solution side, creating a pressure difference. When osmotic equilibrium is reached, this pressure difference is called osmotic pressure. The magnitude of the osmotic pressure depends on the type, concentration, and temperature of the concentrated solution, and is independent of the properties of the semipermeable membrane. Figure 2 As shown, if a pressure greater than the osmotic pressure is applied to the concentrated solution side, the solvent in the concentrated solution will flow to the dilute solution. The direction of this solvent flow is opposite to the original osmotic direction. This process is called reverse osmosis.

[0040] Reverse osmosis utilizes the property of a semi-permeable membrane that allows water to pass through but not salt to remove various salts from water. A portion of the raw water on the surface of the reverse osmosis membrane permeates through the membrane in a direction perpendicular to the membrane to form fresh water. Salts and colloidal substances in the raw water on the surface of the reverse osmosis membrane are concentrated and flow out of the membrane element in a direction parallel to the membrane with the remaining raw water, thus achieving the purpose of desalination. Only a small amount of salt remains in the reverse osmosis permeate, which can be further treated, such as by ion exchange or electro-desalination, to meet water quality requirements.

[0041] Reverse osmosis technology encounters several problems in practical applications, one of which is scale inhibition of the reverse osmosis membrane. Because water contains large amounts of calcium, magnesium, and iron ions, these ions crystallize on the surface of the reverse osmosis membrane, forming hard scale that hinders water permeation and thus affects the effectiveness of the reverse osmosis technology. To solve this problem, reverse osmosis antiscalants are needed. Reverse osmosis antiscalants are special chemical agents that effectively prevent the formation of hard scale. Therefore, the use of reverse osmosis antiscalants is necessary to address this issue.

[0042] Reverse osmosis antiscalant is a special chemical agent that effectively prevents the formation of hard scale, thereby protecting the reverse osmosis membrane and improving the efficiency of reverse osmosis technology. The main functions of reverse osmosis antiscalant are as follows:

[0043] Preventing crystallization: Reverse osmosis antiscalants can prevent the crystallization of ions in water and prevent the formation of hard scale, thereby protecting the reverse osmosis membrane.

[0044] Cleaning function: Reverse osmosis antiscalant can clean the hard scale on the surface of reverse osmosis membrane, keep the reverse osmosis membrane clean, and improve the efficiency of reverse osmosis technology.

[0045] Inhibits bacterial growth: Reverse osmosis antiscalants can also inhibit the growth of bacteria, viruses and other microorganisms in water, ensuring the hygiene and safety of the reverse osmosis membrane.

[0046] Equipment protection: Reverse osmosis antiscalant can protect the components of reverse osmosis equipment and extend the service life of the equipment.

[0047] The principle of reverse osmosis antiscalants is mainly to prevent the crystallization of ions and the formation of hard scale in water through chemical reactions and physical actions. The main components of reverse osmosis antiscalants include the following:

[0048] Corrosion inhibitors: Corrosion inhibitors are chemical substances that can prevent metal corrosion, reduce the degree of corrosion in reverse osmosis equipment, and thus extend the service life of the equipment.

[0049] Ion exchangers: Ion exchangers are chemical substances that can adsorb ions in water, reducing the ion concentration in water and thus preventing ion crystallization and the formation of hard scale.

[0050] Dispersant: A dispersant is a chemical substance that can disperse tiny particles in water evenly, preventing particle aggregation and thus preventing the formation of hard scale.

[0051] Cleaning agent: A cleaning agent is a chemical substance that can remove hard limescale from the surface of a reverse osmosis membrane, keeping the reverse osmosis membrane clean and improving the efficiency of reverse osmosis technology.

[0052] To prevent scaling during reverse osmosis (RO) system operation, scale inhibitors need to be added to each RO feed line in the chemical water treatment system. Currently, scale inhibitor preparation involves manually transporting multiple tanks of inhibitor to the metering tank. This method is labor-intensive, involves frequent personnel contact, and carries a high risk of personal injury during each dosing operation. To reduce the workload of manual dosing and prevent injuries to operators, the dosing equipment needs to be optimized to ensure safe, high-quality, and efficient scale inhibitor preparation and dosing.

[0053] The following is combined with Figure 3 and Figure 4 This invention describes in detail the safe and efficient reverse osmosis antiscalant dosing system provided by embodiments of the present invention.

[0054] like Figure 3 As shown, the safe and efficient reverse osmosis antiscalant dosing system provided in this embodiment of the invention specifically includes: a metering tank 110, a stirring pump 120, a dosing pump 130, an antiscalant tank 140, and a pneumatic diaphragm pump 150.

[0055] Metering tank 110 is connected to dosing pump 130 via dosing pipeline. Metering tank 110 is also connected to water source via water replenishment pipeline. The stirring shaft of stirring pump 120 extends vertically into the interior of metering tank 110. Scale inhibitor ton 140 is connected to pneumatic diaphragm pump 150 via dispensing pipeline. Pneumatic diaphragm pump 150 is connected to metering tank 110 via replenishment pipeline. Pneumatic diaphragm pump 150 is also connected to air source via air supply pipeline.

[0056] The pneumatic diaphragm pump 150 is used to transport the reverse osmosis antiscalant in the antiscalant tank 140 to the metering tank 110. The metering tank 110 draws water from the water source through the water supply line. The stirring pump 120 is used to stir the reverse osmosis antiscalant in the metering tank 110 with the water. The dosing pump 130 is used to transport the stirred agent to the reverse osmosis system.

[0057] In one embodiment, at least one dispensing valve is provided on the dispensing pipeline.

[0058] The dispensing valve is located at the bottom of the side near the scale inhibitor container. The dispensing valve is used to control the connection and disconnection of the dispensing pipeline.

[0059] like Figure 3 As shown, in this embodiment, there are two dispensing valves, namely the first dispensing valve 160 and the second dispensing valve 170.

[0060] Considering that the traditional scale inhibitor is 25kg / barrel and requires frequent handling and dispensing, the improved scale inhibitor is packaged in a ton container, each 1000kg. The scale inhibitor ton container 140 has a dispensing valve near the bottom. After the dispensing valve, a pipeline is connected to the pneumatic diaphragm pump 150 via threaded connection. The pneumatic diaphragm pump 150 is connected to each metering box 110 via pipeline. The pneumatic diaphragm pump 150 is also connected to the air source to the workshop compressed air pipeline.

[0061] In one embodiment, such as Figure 3 As shown, at least one replenishment valve 180 is provided on the replenishment pipeline.

[0062] The replenishment valve 180 is located near the top inlet of the metering box 110. The replenishment valve 180 is used to control the connection and disconnection of the replenishment pipeline.

[0063] In this embodiment, multiple metering boxes 110 can be provided. Each metering box 110 is connected to the pneumatic diaphragm pump 150 through its own replenishment pipeline. Each metering box 110 is equipped with a replenishment valve 180 on its upper replenishment pipeline to individually control the opening and closing of the replenishment pipeline between each metering box and the pneumatic diaphragm pump.

[0064] In one embodiment, such as Figure 3 As shown, at least one gas supply valve 190 is installed on the gas supply pipeline.

[0065] The gas supply valve 190 is located in the middle section of the gas supply pipeline and is used to control the connection and disconnection of the gas supply pipeline.

[0066] In practical applications, a water supply valve 200 is also installed on the water supply pipeline of the metering box 110. The water supply valve 200 is used to control the connection and disconnection of the water supply pipeline.

[0067] In one embodiment, such as Figure 3 As shown, the top of the scale inhibitor ton 140 is equipped with an exhaust port, which is in the open state when the pneumatic diaphragm pump 150 is turned on.

[0068] In the actual dosing process, open the replenishment valve 180 corresponding to the metering tank 110 that needs to be dosed, ensure that the top cover or vent of the scale inhibitor ton 140 is open, open the first outlet valve 160 and the second outlet valve 170, open the air supply valve 190, and then the pneumatic diaphragm pump 150 will operate to deliver the scale inhibitor in the scale inhibitor ton 140 to the metering tank 110. The dosage can be determined by observing the scale markings on the scale inhibitor ton 140. After reaching the dosage, close the air supply valve 190 of the pneumatic diaphragm pump 150 to stop the dosing, and close the replenishment valve 180 of the metering tank 110 and the first outlet valve 160 and the second outlet valve 170 of the scale inhibitor ton 140. Open the water supply valve 200 of the metering tank 110 to add water to the required level, start the stirring pump 120 to mix evenly, and the dosing is complete.

[0069] When reverse osmosis starts, the corresponding antiscalant metering pump will start interlocked to begin adding chemicals to prevent scaling in the reverse osmosis system, thereby protecting the reverse osmosis membrane, extending the reverse osmosis operating time, and improving the reverse osmosis desalination rate and effluent quality.

[0070] In one embodiment, such as Figure 4 As shown, the above-mentioned safe and efficient reverse osmosis antiscalant dosing system may also include: a liquid level sensor 210 and a controller 220.

[0071] The liquid level sensor 210 is located inside the metering tank. The liquid level sensor 210, the stirring pump 120, the dosing pump 130, and the pneumatic diaphragm pump 150 are connected to the controller 220.

[0072] The liquid level sensor 210 is used to collect the measured liquid level value in the metering tank.

[0073] The controller 220 is used to compare the measured liquid level value with the preset lower limit of the liquid level. When the measured liquid level value is detected to be lower than the lower limit of the liquid level, the controller determines the first target replenishment amount, the first target stirring parameter, and the target dosing parameter. Based on the first target replenishment amount, the controller generates and sends the first replenishment control command to the pneumatic diaphragm pump 150. Based on the first target stirring parameter, the controller generates and sends the first stirring control command to the stirring pump 120. Based on the target dosing parameter, the controller generates and sends the dosing control command to the dosing pump 130.

[0074] In this embodiment, the liquid level monitoring and triggering mechanism is based on the liquid level sensor 210 and the controller 220. The liquid level sensor 210 continuously collects the measured liquid level value of the medicine in the metering tank and transmits the data to the controller 220 in real time. The controller 220 has a built-in preset lower limit value of liquid level, which serves as a key threshold for determining whether to replenish the medicine. By comparing the measured liquid level value with the preset lower limit value in real time, the controller automatically completes the logical judgment of whether to replenish the medicine. When the measured liquid level value is lower than the lower limit value, the controller immediately initiates the linkage control process of replenishing the medicine, stirring, and subsequent adding medicine to ensure that the medicine in the metering tank is always maintained at an effective working liquid level.

[0075] After triggering the control process, the controller accurately calculates the first target replenishment amount, the first target stirring parameters (such as stirring time and speed), and the target dosing parameters (such as dosing flow rate and frequency) based on the preset reagent ratio rules and the operating requirements of the reverse osmosis system. Subsequently, the controller generates three types of control commands: a first replenishment control command is sent to the pneumatic diaphragm pump 150, driving it to draw the corresponding dose of scale inhibitor from the scale inhibitor tank and deliver it to the metering tank; a first stirring control command is sent to the stirring pump 120, controlling it to operate according to the set parameters to achieve uniform mixing of scale inhibitor and water; and a dosing control command is sent to the dosing pump 130, enabling it to stably deliver the uniformly mixed reagent to the reverse osmosis system according to the target parameters. The entire process requires no manual intervention, achieving automated linkage of replenishment, stirring, and dosing.

[0076] In one embodiment, such as Figure 4 As shown, the above-mentioned safe and efficient reverse osmosis antiscalant dosing system may also include: a flow sensor 230.

[0077] The flow sensor 230 is located inside the metering box and is connected to the controller 220.

[0078] The flow sensor 230 is used to collect the measured influent flow rate in the metering tank.

[0079] The controller 220 is also used to determine the second target dosage corresponding to the measured influent flow rate based on the pre-established relationship between influent flow rate and dosage, and to generate and issue a second dosage control command to the pneumatic diaphragm pump 150 based on the second target dosage.

[0080] Among them, the first medicine control command has a higher command priority than the second medicine control command.

[0081] With the addition of the flow sensor 230, the system establishes a dual-parameter collaborative control logic for liquid level and flow rate. The flow sensor 230, installed inside the metering tank, collects real-time data on the measured influent flow rate as water enters the tank through the replenishment pipeline and transmits the data synchronously to the controller 220. The controller 220 pre-stores the correspondence between influent flow rate and dosage, such as the standard dosage of scale inhibitor required per unit influent flow rate. Based on the received measured influent flow rate, it accurately calculates the second target dosage to ensure the dosage meets the standard, providing data support for dynamically adjusting the dosage and achieving precise, water-adaptive dosing.

[0082] The controller 220 clearly prioritizes the first replenishment control command over the second replenishment control command to ensure the safety of the system's core liquid level. When the measured liquid level in the metering tank is lower than the preset lower limit, regardless of the second target replenishment amount corresponding to the influent flow rate, the controller prioritizes executing the first replenishment control command to quickly replenish the agent to the safe liquid level. When the liquid level is within the normal range, the controller issues the second replenishment control command based on the second target replenishment amount corresponding to the measured influent flow rate. The controller then dynamically adjusts the scale inhibitor delivery amount through the pneumatic diaphragm pump 150 to ensure that the agent concentration is precisely matched with the influent flow rate, thus guaranteeing the scale inhibition effect while avoiding agent waste.

[0083] In one embodiment, the controller is further configured to determine the second target stirring parameter corresponding to the measured inlet flow rate based on a pre-established correlation between the inlet flow rate and the stirring parameter, and generate and issue a second stirring control command to the stirring pump based on the second target stirring speed.

[0084] Among them, the instruction priority of the first stirring control instruction is higher than that of the second stirring control instruction.

[0085] This system, based on dual-parameter control of liquid level and flow rate, adds a linkage logic between inlet water flow rate and stirring parameters. The measured inlet water flow rate value collected by the flow sensor synchronously provides a basis for adjusting the stirring parameters. The controller pre-stores the correspondence between inlet water flow rate and stirring parameters, that is, the appropriate stirring intensity corresponding to different inlet water flow rates. The larger the inlet water flow rate, the more optimized the stirring parameters are required to ensure that the reagent and water are fully mixed. The controller accurately matches and calculates the second target stirring parameters based on the measured inlet water flow rate value, realizing dynamic adaptation of the stirring process.

[0086] The controller prioritizes the first stirring control command triggered by the lower liquid level over the second stirring control command triggered by the inlet water flow rate, ensuring that core mixing requirements are met first. When the metering tank triggers replenishment due to low liquid level, the controller prioritizes the execution of the first stirring control command, driving the stirring pump to operate according to the first target stirring parameters to quickly achieve uniform mixing of the newly added scale inhibitor with water. When the liquid level is within the normal range, the controller issues the second stirring control command based on the second target stirring parameters corresponding to the measured inlet water flow rate, dynamically adjusting the operating status of the stirring pump to ensure the mixing effect of the agent under different inlet water flows while avoiding energy waste caused by ineffective stirring.

[0087] In one embodiment, at least one water supply valve is provided on the water supply pipeline, and the water supply valve is connected to the controller.

[0088] The controller is also used to compare the measured liquid level value with the preset upper limit of the liquid level, and when the measured liquid level value is detected to be higher than the upper limit of the liquid level, it generates and issues a stop operation command to the pneumatic diaphragm pump and the stirring pump, and controls the water supply valve to close.

[0089] The system uses a level sensor to collect real-time data on the liquid level in the metering tank and transmits it to the controller. The controller also monitors the operation of the water supply valve, pneumatic diaphragm pump, and agitator pump on the water supply line. The controller has a built-in preset upper limit for the liquid level, which serves as a safety threshold to prevent reagent overflow. During reagent or water replenishment, the system continuously compares the measured liquid level with the preset upper limit, dynamically monitoring changes in the liquid level in the metering tank to ensure that the liquid level remains within a safe and controllable range.

[0090] When the controller detects that the measured liquid level is higher than the preset upper limit, it immediately activates the safety protection mechanism. On one hand, it generates a stop operation command and simultaneously sends it to the pneumatic diaphragm pump and the agitator pump to terminate the scale inhibitor replenishment and agitation operations. On the other hand, it directly sends a shut-off command to the water supply valve, cutting off the water supply to the water supply pipeline. By linking the stop of chemical replenishment with the stop of agitation and the shut-off of water supply, the continued rise in liquid level can be quickly contained, preventing chemical overflow due to excessive liquid level, thus ensuring system safety and a clean on-site environment.

[0091] In one embodiment, such as Figure 4 As shown, the above-mentioned safe and efficient reverse osmosis antiscalant dosing system may also include an audible and visual alarm 240, which is connected to the controller 220.

[0092] The controller 220 is also used to generate and send an abnormal liquid level warning signal to the audible and visual alarm 240 when the measured liquid level value is detected to be lower than the lower limit or higher than the upper limit.

[0093] The audible and visual alarm 240 is used to provide audible and visual warnings upon receiving an abnormal liquid level warning signal.

[0094] In this embodiment, the newly added audible and visual alarm 240 is linked with the controller 220 to form a real-time early warning mechanism for abnormal liquid levels. The liquid level sensor 210 continuously collects the measured liquid level value in the metering tank and transmits it to the controller 220. The controller 220 synchronously compares the measured liquid level value with the preset lower and upper limits of the liquid level. When the measured liquid level is detected to be lower than the lower limit or higher than the upper limit, it immediately determines that the liquid level is abnormal, generates a corresponding liquid level abnormality warning signal, and sends the liquid level abnormality warning signal to the audible and visual alarm 240.

[0095] Upon receiving a warning signal, the audible and visual alarm 240 quickly activates its dual audible and visual warning function, providing a clear alarm sound and a conspicuous flashing light to visually alert on-site personnel to the abnormal situation. This design not only works in conjunction with the controller's automatic control logic but also quickly prompts personnel to intervene and verify, preventing abnormal expansion of the liquid level due to automatic control malfunctions, thus further enhancing the safety and reliability of the system operation.

[0096] In summary, the safe and efficient reverse osmosis antiscalant dosing system provided by this invention, through innovative configuration of an antiscalant tank and pneumatic diaphragm pump, combined with components such as a level sensor, flow sensor, controller, and audible and visual alarm, constructs a fully intelligent system with automatic monitoring, precise control, and safety early warning. This system completely replaces the traditional manual handling of small tanks of antiscalant, significantly reducing the safety risks and labor intensity of operators exposed to hazardous chemicals. Furthermore, the tank storage saves space and reduces labor and ground repair costs. Utilizing dual-parameter coordinated control of level and flow, and command priority design, it achieves dynamic adaptation and automated linkage of dosing, stirring, and administration, ensuring uniform and stable reagent ratios and improving the protection effect of the reverse osmosis membrane and the quality of the effluent. Simultaneously, through the linkage of upper and lower liquid level limits for shutdown, valve closure, and audible and visual alarms, it forms a dual safety guarantee, effectively preventing system failures caused by reagent overflow or excessively low liquid levels. Overall, it achieves multiple goals of system safety, automated operation, and precise reagent use, and can adapt to the application needs of reverse osmosis systems in various water treatment fields.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A safe and efficient reverse osmosis antiscalant dosing system, characterized in that, include: Metering tank, mixing pump, dosing pump, scale inhibitor tank, and pneumatic diaphragm pump; The metering tank is connected to the dosing pump via a dosing pipeline. The metering tank is also connected to a water source via a water replenishment pipeline. The stirring shaft of the stirring pump extends vertically into the interior of the metering tank. The scale inhibitor ton container is connected to the pneumatic diaphragm pump via a dispensing pipeline. The pneumatic diaphragm pump is connected to the metering tank via a replenishment pipeline. The pneumatic diaphragm pump is also connected to an air source via an air supply pipeline. The pneumatic diaphragm pump is used to transport the reverse osmosis antiscalant in the antiscalant ton to the metering tank. The metering tank draws water from the water source through the water supply pipeline. The stirring pump is used to stir the reverse osmosis antiscalant and water in the metering tank. The dosing pump is used to transport the stirred agent to the reverse osmosis system.

2. The safe and efficient reverse osmosis antiscalant dosing system according to claim 1, characterized in that, At least one dispensing valve is provided on the dispensing pipeline; The dispensing valve is located at the bottom of the side near the scale inhibitor ton container, and the dispensing valve is used to control the connection and disconnection of the dispensing pipeline.

3. The safe and efficient reverse osmosis antiscalant dosing system according to claim 1, characterized in that, At least one medication valve is provided on the medication pipeline; The replenishment valve is located near the top inlet of the metering box, and the replenishment valve is used to control the connection and disconnection of the replenishment pipeline.

4. The safe and efficient reverse osmosis antiscalant dosing system according to claim 1, characterized in that, At least one gas supply valve is provided on the gas supply pipeline; The gas supply valve is located in the middle section of the gas supply pipeline, and the gas supply valve is used to control the connection and disconnection of the gas supply pipeline.

5. The safe and efficient reverse osmosis antiscalant dosing system according to claim 1, characterized in that, The top of the scale inhibitor container is equipped with an exhaust port, which is in the open state when the pneumatic diaphragm pump is turned on.

6. The safe and efficient reverse osmosis antiscalant dosing system according to claim 1, characterized in that, The system also includes: a liquid level sensor and a controller; The liquid level sensor is located inside the metering tank, and the liquid level sensor, the stirring pump, the dosing pump, and the pneumatic diaphragm pump are connected to the controller; The liquid level sensor is used to collect the measured liquid level value in the metering tank; The controller is used to compare the measured liquid level value with a preset lower limit value, and when the measured liquid level value is detected to be lower than the lower limit value, it determines the first target replenishment amount, the first target stirring parameter, and the target dosing parameter, generates and sends a first replenishment control command to the pneumatic diaphragm pump based on the first target replenishment amount, generates and sends a first stirring control command to the stirring pump based on the first target stirring parameter, and generates and sends a dosing control command to the dosing pump based on the target dosing parameter.

7. The safe and efficient reverse osmosis antiscalant dosing system according to claim 6, characterized in that, The system also includes: a flow sensor; The flow sensor is located inside the metering box and is connected to the controller. The flow sensor is used to collect the measured inflow rate of the water in the metering tank; The controller is also used to determine the second target dosage corresponding to the measured influent flow rate based on a pre-established correlation between influent flow rate and dosage, and to generate and issue a second dosage control command to the pneumatic diaphragm pump based on the second target dosage. The first medicine control command has a higher command priority than the second medicine control command.

8. The safe and efficient reverse osmosis antiscalant dosing system according to claim 7, characterized in that, The controller is also used to determine the second target stirring parameter corresponding to the measured influent flow rate based on the pre-established relationship between the influent flow rate and the stirring parameter, and to generate and issue a second stirring control command to the stirring pump based on the second target stirring speed. The first stirring control command has a higher command priority than the second stirring control command.

9. The safe and efficient reverse osmosis antiscalant dosing system according to claim 6, characterized in that, At least one water supply valve is provided on the water supply pipeline, and the water supply valve is connected to the controller. The controller is also used to compare the measured liquid level value with the preset upper limit value of the liquid level, and when it is detected that the measured liquid level value is higher than the upper limit value of the liquid level, generate and issue a stop operation command to the pneumatic diaphragm pump and the stirring pump, and control the water supply valve to close.

10. The safe and efficient reverse osmosis antiscalant dosing system according to claim 9, characterized in that, The system also includes an audible and visual alarm, which is connected to the controller; The controller is also used to generate and send an abnormal liquid level warning signal to the audible and visual alarm when the measured liquid level value is detected to be lower than the lower limit or higher than the upper limit. The audible and visual alarm is used to provide audible and visual warnings upon receiving the abnormal liquid level warning signal.

Images