A drug dispensing system that can improve drug efficacy and has an emergency fluid replenishment device

Abstract

This invention belongs to the field of water treatment technology, specifically relating to a chemical dosing system that can improve the efficacy of chemicals and has an emergency replenishment device. The system includes an online dilution device, a mother liquor tank, an emergency mother liquor pipe, and a controller. The mother liquor tank has an outlet pipe at its outlet, and the mother liquor pipe is connected to both the mother liquor inlet pipe and the emergency mother liquor pipe. The mother liquor inlet pipe is equipped with a mother liquor inlet flow valve and a mother liquor inlet flow meter. The emergency mother liquor pipe is equipped with an emergency mother liquor flow valve and a second normally open solenoid valve. The mother liquor inlet flow meter is electrically connected to the input terminal of the controller, and the mother liquor inlet flow valve and the emergency mother liquor flow valve are electrically connected to the output terminal of the controller. This invention is used for rapid dosing of diluted flocculants and emergency chemical dosing processes after chemical interruption in water treatment.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, specifically relating to a drug dosing system that can improve drug efficacy and has an emergency replenishment device. Background Technology

[0002] Water treatment refers to the process of purifying wastewater or domestic water through physical or chemical methods. Among these methods, the addition of chemical solutions (such as flocculants) is a crucial step in chemical treatment.

[0003] The dosing of chemicals in water treatment processes has long been automated. The process involves opening bulk bags of chemicals in an unpacking machine and conveying them to a silo. After being metered by a precise metering device, the chemicals are mixed with water to form a high-concentration mother liquor. This high-concentration mother liquor is then stored in a mother liquor tank or conveyed to the inlet of the water treatment tank for online dilution before being added. Throughout this process, the hoisting and opening of the bulk bags, the conveying of chemicals in the silo, the precise metering, and the conveying of the mother liquor and dilution water all require electricity to operate, including the solenoid valves and flow meters involved.

[0004] In water treatment processes, the distance between the dosing point and the dosing room is relatively far, and the diameter of the conveying pipeline is relatively large. Usually, the chemical solution is diluted before being transported to the dosing point. Sometimes, when the amount of chemical to be added is relatively small, it may take 30 minutes or even up to an hour for the chemical solution to flow to the dosing point. This can lead to a decrease in the efficacy of the chemical due to hydrolysis.

[0005] Furthermore, the addition of the chemical solution must be uninterrupted. In the event of equipment failure or power outages, the automatic chemical dosing will be interrupted, causing the entire water treatment process to stop and impacting production efficiency. Current technology typically involves placing a plastic bucket containing some chemical solution on the water treatment tank for emergency handling of interrupted chemical dosing. In the event of an unexpected interruption, the solution in the bucket can be manually added to the water treatment tank.

[0006] Current emergency treatment methods have two problems: First, the concentration or dosage of the chemical solution usually needs to be adjusted temporarily based on the properties of the raw water, such as turbidity. When adding chemicals stored in the tank during an emergency, it is impossible to guarantee the accurate concentration and dosage, which leads to a decrease in water treatment effectiveness. Second, if the chemical solution is stored in the tank for a long time, it is prone to hydrolysis and other reactions, resulting in the loss of effective chemical components in the solution, further affecting the accuracy of the dosage and reducing the water treatment effect. Summary of the Invention

[0007] To address the shortcomings of existing technologies where the distance between the dosing point and the dosing room is too far, and the emergency handling methods for interrupted automatic dosing of the pesticide solution, this invention provides a method for setting up a mother liquor tank near the dosing point to dilute the pesticide solution locally. The mother liquor tank also serves as the pesticide solution source for the emergency replenishment device, providing emergency replenishment of pesticide solution when the pesticide supply is interrupted. This system can reduce the residence time of the diluted solution in the pipeline, thereby improving the efficacy of the pesticide. In addition, this system can ensure that emergency dosing is performed according to the concentration and dosage of the pesticide solution at the time of the interruption of automatic dosing. Moreover, the pesticide solution used for emergency dosing is freshly prepared and there is no loss of effective chemical components due to hydrolysis, deterioration, or other reasons.

[0008] A drug dosing system that can improve drug efficacy and has an emergency fluid replenishment device includes a mother liquor tank, an online dilution device, and a controller, which are installed near the dosing point in a water treatment tank. The mother liquor tank is connected to the front end of the online dilution device through a mother liquor inlet pipe. The front end of the online dilution device is also provided with a dilution water inlet pipe. The rear end of the online dilution device is provided with a dilution solution dosing pipe for adding drugs to the water treatment tank. The online dilution device and the controller are electrically connected.

[0009] Preferably, it also includes an emergency mother liquor pipe, the mother liquor tank is connected to the emergency mother liquor pipe through the mother liquor pipe, the emergency mother liquor pipe is connected to an emergency mother liquor flow valve and a second normally open solenoid valve, and the emergency dosing pipe is connected after the second normally open solenoid valve.

[0010] Preferably, it also includes an emergency water supply tank, an emergency water pipe, and an emergency dilution device. The outlet of the emergency water supply tank is provided with a water supply tank outlet pipe, which is connected to the dilution water inlet pipe and the emergency water pipe respectively. The dilution water inlet pipe is equipped with a dilution water flow control device, and the emergency water pipe is equipped with an emergency water flow valve and a third normally open solenoid valve. The dilution water flow control device is electrically connected to the controller, and the emergency water flow valve is electrically connected to the output terminal of the controller. The rear end of the emergency mother liquor pipe and the rear end of the emergency water pipe are connected to the emergency dilution device, and the rear end of the emergency dilution device is provided with an emergency dosing pipe for adding chemicals to the water treatment tank.

[0011] Preferably, the outlet of the emergency water supply tank is located at the bottom of the emergency water supply tank, and an air inlet pipe is provided at the top of the emergency water supply tank, with a fourth normally open solenoid valve provided on the air inlet pipe; And / or, at least one shut-off valve is provided on the dilution water inlet pipe; And / or, a backup bypass is connected in parallel to the dilution water inlet pipe, and at least one shut-off valve is provided on the backup bypass; And / or, the dilution water flow control device includes a dilution water flow valve and a dilution water flow meter, the dilution water flow meter being electrically connected to the input terminal of the controller, and the dilution water flow valve being electrically connected to the output terminal of the controller. Preferably, the dilution water inlet pipe and the emergency water pipe have the same diameter; or, the dilution water flow control device is a metering pump, and the metering pump is electrically connected to the output terminal of the controller.

[0012] Preferably, the mother liquor flow control device includes a mother liquor inlet flow valve and a mother liquor inlet flow meter, the mother liquor inlet flow meter is electrically connected to the input terminal of the controller, and the mother liquor inlet flow valve is electrically connected to the output terminal of the controller; preferably, the mother liquor inlet pipe and the emergency mother liquor pipe have the same diameter.

[0013] Alternatively, the mother liquor flow control device is a metering pump, and the metering pump is electrically connected to the output terminal of the controller.

[0014] Preferably, the rear end of the emergency mother liquor pipe is connected to an emergency dosing pipe for adding chemicals to the water treatment tank; Alternatively, the online dilution device includes a first mixer, the rear end of which is connected to a diluent dosing pipe, and the rear end of the emergency mother liquor pipe is connected to the first mixer.

[0015] Preferably, the outlet of the mother liquor tank is located at the bottom of the mother liquor tank, and an air inlet pipe is provided at the top of the mother liquor tank, with a first normally open solenoid valve provided on the air inlet pipe.

[0016] Preferably, at least one shut-off valve is provided on the mother liquor inlet pipe; And / or, a mother liquor backup bypass is connected in parallel on the mother liquor inlet pipe, and at least one shut-off valve is provided on the mother liquor backup bypass.

[0017] Preferably, the device further includes a mother liquor supply device, wherein a mother liquor delivery main pipe is provided at the outlet of the mother liquor supply device, and a replenishment tank inlet pipe is provided at the inlet of the mother liquor tank, and the mother liquor delivery main pipe is connected to the replenishment tank inlet pipe.

[0018] Preferably, the mother liquor supply device is a mother liquor tank; Alternatively, the mother liquor supply device is a mother liquor quantitative dosing system, which includes a mixing and dissolving device. The inlet of the mixing and dissolving device is connected to a drug metering device and a solution water inlet pipe, and the outlet of the mixing and dissolving device is connected to the mother liquor delivery main pipe. Preferably, the solution inlet pipe is equipped with a solution flow valve and a solution flow meter, the solution flow meter is electrically connected to the input terminal of the controller, and the solution flow valve is electrically connected to the output terminal of the controller.

[0019] Preferably, the rear end of the main mother liquor delivery pipe is connected to at least two replenishment tank inlet pipes. Each replenishment tank inlet pipe is sequentially provided with a mother liquor tank, a mother liquor pipe, an online dilution device, and a diluent dosing pipe at its rear end. Each mother liquor pipe is connected to an emergency mother liquor pipe at its rear end.

[0020] The present invention also provides a method for emergency fluid replenishment using the above-described system, comprising the following steps: (1) Prepare the mother liquor; (2) Transfer the mother liquor into the mother liquor tank; (3) The mother liquor is fed from the mother liquor tank into the online dilution device and the emergency dosing device. The flow rate of the mother liquor allowed to pass through the online dilution device and the emergency dosing device is kept the same in real time by adjusting the opening of the flow valve. The emergency dosing device is cut off or connected by a normally open solenoid valve. (4) In the case of non-emergency dosing, the normally open solenoid valve is closed by powering on, and the mother liquor is diluted by the online dilution device to complete the dosing of the medicine; In case of emergency dosing, the normally open solenoid valve is opened when the power is cut off, and the dosing solution is added through the emergency dosing device.

[0021] Preferably, the outlet of the mother liquor tank is located at the bottom of the mother liquor tank, and an air inlet pipe is provided at the top of the mother liquor tank, with a normally open solenoid valve installed on the air inlet pipe.

[0022] Preferably, in step (4), in the case of emergency drug administration, the added drug solution is the mother solution or the diluted mother solution.

[0023] Preferably, in step (4), the process of adding dilution water includes the following steps: (a) Transfer dilution water into the emergency water supply tank; (b) Dilute water is fed into the online dilution device and the emergency dosing device from the emergency water supply tank. The flow rate of dilute water allowed to pass through the online dilution device and the emergency dosing device is kept the same in real time by adjusting the opening of the flow valve. The emergency dosing device is cut off or connected by a normally open solenoid valve. (c) In the case of non-emergency dosing, the normally open solenoid valve is closed by powering on, and the mother liquor is diluted by the online dilution device to complete the dosing of the medicine; In case of emergency dosing, the normally open solenoid valve is opened after power is cut off, and the dosing is completed after the mother liquor is diluted by the emergency dosing device.

[0024] The present invention also provides a control system for the above-mentioned drug solution dosing method, including a controller, wherein the input end of the controller is connected to a mother liquor inlet flow meter, and the output end of the controller is connected to a mother liquor inlet flow valve and an emergency mother liquor flow valve; The mother liquor inlet flow meter is used to detect the flow rate of the mother liquor during the dilution process; The mother liquor inlet flow valve is used to regulate the flow rate of the mother liquor during the dilution process. The emergency mother liquor flow valve is used to regulate the flow rate of the mother liquor during the emergency addition of the medicine. The controller synchronously adjusts the opening of the mother liquor inlet flow valve and the emergency mother liquor flow valve according to the input signal from the mother liquor inlet flow meter.

[0025] Preferably, the input terminal of the controller is connected to a dilution water flow meter, and the output terminal of the controller is connected to a dilution water flow valve and an emergency water flow valve; The dilution water flow meter is used to detect the flow rate of dilution water during the dilution process of the mother liquor; The dilution water flow valve is used to regulate the flow rate of dilution water during the mother liquor dilution process; The emergency water flow valve is used to regulate the flow rate of dilution water during the emergency addition of the medicine solution; The controller synchronously adjusts the dilution water flow valve and the emergency water flow based on the input signal from the dilution water flow meter. Valve opening degree.

[0026] Preferably, the input terminal of the controller is connected to a liquid dispensing water flow meter, and the output terminal of the controller is connected to a liquid dispensing water flow valve and a reagent metering device; The solution water flow meter is used to detect the flow rate of the solution water during the preparation of the mother liquor; The solution preparation water flow valve is used to regulate the flow rate of the solution preparation water during the preparation of the mother liquor; The drug metering device is used to adjust the amount of drug added during the preparation of the mother liquor; The controller adjusts the opening degree of the liquid preparation water flow valve according to the input signal from the liquid preparation water flow meter.

[0027] Preferably, the input terminal of the controller is connected to a process parameter input device, which is used to input at least one of the following: raw water turbidity, mother liquor concentration, mother liquor flow rate, or dilution water flow rate.

[0028] Preferably, the process parameter input device is at least one of a touch screen, input buttons, a mouse, or a raw water turbidity detection device.

[0029] Preferably, the output of the controller is also connected to a power module; The power module is used to disconnect or connect the power supply to at least one normally open solenoid valve; The normally open solenoid valve is used to cut off or open the pipeline for emergency drug addition.

[0030] This invention provides a drug dispensing system that can improve drug efficacy and has an emergency fluid replenishment device, which has the following beneficial effects: 1. It shortens the distance from the diluted drug solution to the dosing point, effectively preventing hydrolysis caused by excessively long transportation time to the dosing point when the dosage is low, thus avoiding a decrease in drug efficacy. 2. The chemical dosing system of this invention utilizes a mother liquor tank and an emergency mother liquor pipe for emergency dosing. Under normal operating conditions, the emergency mother liquor pipe is shut off via a normally open solenoid valve. Simultaneously, the emergency mother liquor flow valve on the emergency mother liquor pipe is controlled by a controller to ensure its opening degree is the same as that of the mother liquor inlet flow valve on the normal dosing pipeline. In the event of an unexpected power outage or maintenance of the normal dosing pipeline, the normally open solenoid valve opens, and the opening degree of the emergency mother liquor flow valve remains at the level during the power outage. At this time, the emergency mother liquor pipe can add mother liquor to the downstream process at the flow rate during the power outage. The above process ensures that during emergency dosing, the dosing rate of the agent (i.e., the flow rate of the mother liquor) is consistent with the moment of power outage, making the water treatment effect during emergency dosing consistent with that during the power outage, thus solving the problem of uncontrollable emergency dosing in the prior art.

[0031] 2. According to existing technical knowledge, diluted solutions are more prone to hydrolysis and other changes when stored for extended periods compared to high-concentration mother liquors. In the technical solution of this invention, the emergency dosing solution is stored as a mother liquor in a mother liquor tank, and is diluted only before being added to the water treatment tank during normal dosing. For emergency dosing, depending on the preferred option of the emergency dosing device, the mother liquor can be added directly to the water treatment tank, or it can be added after dilution. This emergency dosing method overcomes the problem of hydrolysis and deterioration of emergency dosing solutions during long-term storage.

[0032] 3. In the preferred embodiment, the mother liquor tank and the emergency water replenishment tank can operate automatically without electricity in the event of a power outage, and discharge the stored mother liquor or dilution water by gravity.

[0033] 4. In the preferred scheme, a backup bypass for the mother liquor and a backup bypass for the inlet water are set up, which can be used as backup dosing pipelines or as pipelines for the venting system when the equipment is under maintenance.

[0034] 5. In the preferred embodiment, the mother liquor supply device can be set as a simple mother liquor tank, or it can be set as an automatic liquid dispensing system to improve the automation level of the system.

[0035] 6. In the preferred embodiment, the main mother liquor conveying pipe can be connected to multiple branch lines at the rear end, and each branch line can dosing for different water treatment tanks to adapt to water plants of different water treatment scales.

[0036] The emergency fluid resuscitation method provided by this invention has the following beneficial effects: 1. The chemical dosing method of this invention utilizes a backup mother liquor tank and an emergency mother liquor pipe for emergency dosing. Under normal operating conditions, the emergency mother liquor pipe is shut off via a normally open solenoid valve. Simultaneously, the emergency mother liquor flow valve on the emergency mother liquor pipe is controlled by a controller to maintain its opening degree identical to that of the mother liquor inlet flow valve on the normal dosing pipeline. In the event of an unexpected power outage or maintenance of the normal dosing pipeline, the normally open solenoid valve opens, and the opening degree of the emergency mother liquor flow valve remains at the level during the power outage. In this case, the emergency mother liquor pipe can add mother liquor to the downstream process at the flow rate during the power outage. This process ensures that the dosing rate (i.e., the flow rate of the mother liquor) during emergency dosing is consistent with the moment of power outage, resulting in consistent water treatment effects during emergency dosing and resolving the problem of uncontrollable emergency dosing in existing technologies.

[0037] 2. According to existing technical knowledge, diluted solutions are more prone to hydrolysis and other changes compared to high-concentration mother liquors. In the technical solution of this invention, the emergency dosing solution is stored as a mother liquor in a mother liquor tank, and is diluted only before being added to the water treatment tank during normal dosing. However, for emergency dosing, depending on the preferred option of the emergency dosing device, it can be added directly to the water treatment tank as the mother liquor or added after dilution. This emergency dosing method overcomes the problem of easy hydrolysis and deterioration of emergency dosing solutions during long-term storage.

[0038] 3. In the preferred embodiment, the mother liquor tank and the emergency water replenishment tank can operate automatically without electricity in the event of a power outage, and discharge the stored mother liquor or dilution water by gravity.

[0039] The control system for the above-mentioned drug solution dosing method provided by the present invention has the following beneficial effects: 1. The control system of this invention can control the flow rate of the mother liquor according to process requirements, thereby controlling the dosing rate of the reagents and ensuring the effectiveness of water treatment. Simultaneously, it can also ensure that the dosing rate of the reagents is consistent with the time of power failure during emergency dosing, thus ensuring that the water treatment effect during emergency dosing is consistent with that under normal operating conditions.

[0040] 2. In the preferred embodiment, the control system of the present invention can control the flow rate of dilution water according to process requirements, thereby controlling the concentration of the added chemical solution and ensuring the water treatment effect. Simultaneously, it can also ensure that the flow rate of dilution water is consistent with the time of power failure during emergency dosing, thus ensuring that the water treatment effect during emergency dosing is consistent with that under normal operating conditions.

[0041] 3. In the preferred embodiment, the control system of the present invention can automatically prepare mother liquor of the required concentration for the process.

[0042] 4. In the preferred embodiment, the process parameters such as the mother liquor concentration, diluent concentration, and diluent addition rate required in the method of the present invention can be manually input; alternatively, the raw water turbidity can be detected, and then the required process parameters such as the mother liquor concentration, diluent concentration, and diluent addition rate can be automatically calculated according to the requirements of the water treatment process in the prior art.

[0043] 5. The basic working mode of the method of this invention is that when power is lost, all electrical equipment (shut-off valves, flow valves, and flow meters, etc.) automatically shuts down, and the normally open solenoid valve automatically opens when power is lost, thereby realizing emergency dosing. In the preferred embodiment, another working mode is added. By setting a power module that can control the power supply of the normally open solenoid valve, the normally open solenoid valve can be manually controlled to open in emergency situations where there is no power outage (such as equipment failure).

[0044] Obviously, based on the above description of the present invention, and according to common technical knowledge and conventional methods in the field, various other modifications, substitutions or alterations can be made without departing from the basic technical concept of the present invention.

[0045] The following detailed embodiments further illustrate the above-described content of the present invention. However, this should not be construed as limiting the scope of the present invention to the following examples. All technologies implemented based on the above-described content of the present invention fall within the scope of the present invention. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the system structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a partial system structure according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the system structure of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of a partial system structure according to Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of a partial system structure according to Embodiment 3 of the present invention; Figure 6 This is a schematic diagram of the system structure of Embodiment 4 of the present invention; Figure 7 This is a schematic diagram of the mother liquor supply device in the system of Embodiment 4 of the present invention; Figure 8 This is a schematic diagram of the mother liquor supply device in the system of Embodiment 5 of the present invention; Figure 9 This is a schematic diagram of the control system connection according to Embodiment 6 of the present invention.

[0047] in: 1-Inlet pipe of the replenishment tank; 2-Mother liquor tank, 201-Normally open solenoid valve; 3-Mother liquor tube; 4-Water supply tank outlet pipe; 5-Online dilution device, 501-Mother liquor inlet pipe, 5011-First shut-off valve, 5012-Mother liquor inlet flow valve, 5013-Mother liquor inlet flow meter, 5014-Second shut-off valve, 502-Mother liquor backup bypass, 5021-Third shut-off valve, 503-Dilution water inlet pipe, 5031-Fourth shut-off valve, 5032-Dilution water flow valve, 5033-Dilution water flow meter, 5034-Fifth shut-off valve, 504-Inlet backup bypass, 5041-Sixth shut-off valve, 505-First mixer; 6-Diluent dosing tube; 7-Emergency mother liquor pipe, 701-Emergency mother liquor flow valve, 702-Second normally open solenoid valve; 8-Emergency water pipe, 801-Emergency water flow valve, 802-Third normally open solenoid valve; 9-Emergency dilution device; 901-Second mixer; 10-Emergency dosing tube; 11-Emergency water supply tank, 1101-Fourth normally open solenoid valve; 12-Water inlet pipe for water replenishment tank; 13-Mother liquor delivery main pipe; 14-Mother liquor supply device, 1401-Mother liquor tank, 1402-Unpacking device, 1403-Hopper, 1404-Air injection device, 1405-Water inlet pipe for dispensing, 14051-Seventh shut-off valve, 14052-Check valve, 14053-Water flow valve for dispensing, 14054-Water flow meter for dispensing, 14055-Eighth shut-off valve, 1406-Reagent metering device, 1407-Mixing and dissolving device. Detailed Implementation

[0048] In this invention, "pipe" and "bypass" both refer to pipelines used for passing solution water, mother liquor, dilution water, or diluent. "Front end" refers to the direction in which solution water, mother liquor, dilution water, or diluent flows into the pipeline or equipment; "rear end" refers to the direction in which solution water, mother liquor, dilution water, or diluent flows out of the pipeline or equipment; and "sequential arrangement" means that the pipelines or equipment are connected sequentially along the flow direction of solution water, mother liquor, dilution water, or diluent. "Shut-off valve" refers to a valve that can be opened or closed when energized and will close when de-energized; the "shut-off valve" can be a solenoid valve. "Flow valve" can have its opening adjusted by a controller when energized, and maintains the opening degree at the time of power failure when de-energized. "Normally open solenoid valve" can close when energized and remains normally open when de-energized.

[0049] The algorithms for data acquisition, transmission, storage, and processing steps not specifically described in the embodiments of this invention, as well as the hardware structures and circuit connections not specifically described, can all be implemented using content already disclosed in the prior art.

[0050] Example 1

[0051] The drug dispensing system in this embodiment is as follows: Figure 1 , 2 As shown, the system includes, in sequence, a replenishment tank inlet pipe 1, a mother liquor tank 2, a mother liquor pipe 3, a replenishment water tank outlet pipe 4, and a diluent dosing pipe 6. The system also includes a controller, which can be a PLC chip, a PC, or a server.

[0052] The inlet of the mother liquor tank 2 is located at the bottom of the mother liquor tank 2, and the replenishment tank inlet pipe 1 is connected to the inlet of the mother liquor tank 2. The outlet of the mother liquor tank 2 is located at the bottom of the mother liquor tank 2, and the mother liquor pipe 3 is connected to the outlet of the mother liquor tank 2. An air inlet pipe is provided at the top of the mother liquor tank 2, and a first normally open solenoid valve 201 is provided on the air inlet pipe. When the system is powered off, the first normally open solenoid valve 201 opens to replenish air into the mother liquor tank 2 to maintain air pressure, so that the mother liquor in the mother liquor tank 2 can be transported to the downstream process under the action of gravity.

[0053] The online dilution device 5 includes a first mixer 505, preferably a tubular mixer. The first mixer 505 has a mother liquor inlet pipe 501 and a dilution water inlet pipe 503 at its front end, and is connected to the diluent dosing pipe 6 at its rear end. The front end of the mother liquor inlet pipe 501 is connected to the mother liquor pipe 3. A first shut-off valve 5011, a mother liquor inlet flow valve 5012, a mother liquor inlet flow meter 5013, and a second shut-off valve 5014 are sequentially arranged on the mother liquor inlet pipe 501. A fourth shut-off valve 5031, a dilution water flow valve 5032, a dilution water flow meter 5033, and a fifth shut-off valve 5034 are sequentially arranged on the dilution water inlet pipe 503.

[0054] The rear end of the mother liquor pipe 3 is also connected to an emergency mother liquor pipe 7, and the rear end of the emergency mother liquor pipe 7 is connected to an emergency dosing pipe 10 for adding chemicals to the water treatment tank. The emergency mother liquor pipe 7 is equipped with an emergency mother liquor flow valve 701 and a second normally open solenoid valve 702. The mother liquor inlet flow meter 5013 is electrically connected to the input terminal of the controller, and the mother liquor inlet flow valve 5012 and the emergency mother liquor flow valve 701 are electrically connected to the output terminal of the controller. In order to ensure that the opening degree of the mother liquor inlet flow valve 5012 and the emergency mother liquor flow valve 701 corresponds to the flow rate of the mother liquor, in this embodiment, the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 are set up with the same pipe diameter.

[0055] As a preferred embodiment, a mother liquor backup bypass 502 is connected in parallel to the mother liquor inlet pipe 501, and a third shut-off valve 5021 is installed on the mother liquor backup bypass 502. A water inlet backup bypass 504 is connected in parallel to the dilution water inlet pipe 503, and a sixth shut-off valve 5041 is installed on the water inlet backup bypass 504.

[0056] Using the above system, the drug dosing method in this embodiment includes the following steps: (1) Prepare the mother liquor; (2) Transfer the mother liquor into mother liquor tank 2; (3) The mother liquor is fed from the mother liquor tank 2 into the online dilution device 5 and the emergency dosing device (i.e., the emergency mother liquor pipe 7). By adjusting the opening of the flow valve, the allowable flow rates of mother liquor in the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 are maintained at the same level in real time. The emergency dosing device is disconnected or connected through a normally open solenoid valve. In actual working conditions, at least one of the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 is usually disconnected by other valves. Therefore, the "allowable flow rate of mother liquor" refers to the flow rate of mother liquor in the mother liquor inlet pipe 501 or the emergency mother liquor pipe 7 if no other valve disconnects the pipeline.

[0057] (4) In the case of non-emergency dosing, the first normally open solenoid valve 201 and the second normally open solenoid valve 702 are closed by powering on, and the mother liquor is diluted by the online dilution device 5 to complete the dosing of the medicine. In the event of an emergency dosing operation, after a power outage, the first normally open solenoid valve 201 and the second normally open solenoid valve 702 are opened, all shut-off valves are closed, and all flow valves maintain the opening degree at the time of the power outage. The dosing is completed through the emergency mother liquor pipe 7 and the emergency dosing pipe 10. This embodiment features a simple system structure. In the event of an emergency dosing operation, the mother liquor with the same flow rate as at the time of the power outage is directly added to the water treatment tank, ensuring the accuracy of the emergency dosing rate.

[0058] Example 2

[0059] The structure of the drug dosing system in this embodiment is as follows: Figure 3 , 4 As shown, its basic structure is the same as that of Embodiment 1, except that this embodiment also includes an emergency water replenishment tank 11. The inlet of the emergency water replenishment tank 11 is located at the top of the emergency water replenishment tank 11, and the outlet of the emergency water replenishment tank 11 is located at the bottom of the emergency water replenishment tank 11. The outlet of the emergency water replenishment tank 11 is connected to a water replenishment tank outlet pipe 4, and the rear end of the water replenishment tank outlet pipe 4 is connected to the dilution water inlet pipe 503. The rear end of the water replenishment tank outlet pipe 4 is also connected to an emergency water pipe 8. An air inlet pipe is provided at the top of the emergency water replenishment tank 11, and a fourth normally open solenoid valve 1101 is provided on the air inlet pipe.

[0060] The rear ends of the emergency mother liquor pipe 7 and the emergency water pipe 8 are connected to the emergency dilution device 9. The emergency dilution device 9 includes a second mixer 901, which should be a non-electrical mixer, such as a tubular mixer. An emergency dosing pipe 10 for adding chemicals to the water treatment tank is provided at the rear end of the second mixer 901.

[0061] The dilution water flow meter 5033 is electrically connected to the input terminal of the controller, and the dilution water flow valve 5032 and the emergency water flow valve 801 are electrically connected to the output terminal of the controller. To ensure that the opening degree of the dilution water flow valve 5032 and the emergency water flow valve 801 corresponds exactly to the flow rate of the dilution water, in this embodiment, the dilution water inlet pipe 503 and the emergency water pipe 8 are configured with pipes of the same diameter.

[0062] Using the above system, the drug dosing method in this embodiment includes the following steps: (1) Prepare the mother liquor.

[0063] (2) Input the mother liquor into the mother liquor tank 2; input the dilution water into the emergency water replenishment tank 11.

[0064] (3) The mother liquor is fed from the mother liquor tank 2 into the online dilution device 5 and the emergency dosing device (i.e., the emergency mother liquor pipe 7). By adjusting the opening of the flow valve, the allowable flow rate of mother liquor in the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 is kept the same in real time.

[0065] Diluent is fed into the online dilution device 5 and the emergency dosing device (i.e., emergency water pipe 8) from the emergency water supply tank 11. By adjusting the opening of the flow valve, the allowable flow rates of diluent in the diluent inlet pipe 503 and the emergency water pipe 8 are maintained at the same level in real time.

[0066] The emergency dosing device is either disconnected or connected via a second normally open solenoid valve 702 and a third normally open solenoid valve 802.

[0067] (4) In the case of non-emergency dosing, the first normally open solenoid valve 201, the second normally open solenoid valve 702, the third normally open solenoid valve 802 and the fourth normally open solenoid valve 1101 are closed by powering on, and the mother liquor is diluted by the online dilution device 5 to complete the dosing of the medicine. In the event of an emergency dosing operation, after a power outage, the first normally open solenoid valve 201, the second normally open solenoid valve 702, the third normally open solenoid valve 802, and the fourth normally open solenoid valve 1101 are opened. All shut-off valves close, and all flow valves maintain the opening degree at the time of the power outage. The mother liquor is diluted by the emergency dilution device 9 to complete the dosing. In this embodiment, during emergency dosing, a diluent with the same flow rate and concentration as at the time of the power outage is added to the water treatment tank, ensuring the accuracy of the emergency dosing speed and concentration, and guaranteeing that the water treatment effect under emergency dosing conditions is almost identical to that under normal dosing conditions.

[0068] Example 3

[0069] The structure of the drug dosing system in this embodiment is as follows: Figure 5 As shown, its structure is basically the same as that of Embodiment 2, except that: this embodiment does not have an emergency dilution device 9, and the function of the emergency dilution device 9 is realized by the online dilution device 5; this embodiment does not have an emergency dosing pipe 10, and the function of the emergency dosing pipe 10 is realized by the diluent dosing pipe 6. Specifically, the rear end of the mother liquor pipe 3 is connected to both the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7. The rear ends of both the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 are connected to the first mixer 505 in the online dilution device 5, that is, the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 are connected in parallel; the rear end of the water replenishment tank outlet pipe 4 is connected to both the dilution water inlet pipe 503 and the emergency water pipe 8. The rear ends of both the dilution water inlet pipe 503 and the emergency water pipe 8 are connected to the first mixer 505 in the online dilution device 5, that is, the dilution water inlet pipe 503 and the emergency water pipe 8 are connected in parallel.

[0070] Using the above system, the drug dosing method in this embodiment includes the following steps: (1) Prepare the mother liquor.

[0071] (2) Input the mother liquor into the mother liquor tank 2; input the dilution water into the emergency water replenishment tank 11.

[0072] (3) The mother liquor is fed from the mother liquor tank 2 into the online dilution device 5 and the emergency dosing device (i.e., the emergency mother liquor pipe 7). By adjusting the opening of the flow valve, the allowable flow rate of mother liquor in the mother liquor inlet pipe 501 and the emergency mother liquor pipe 7 is kept the same in real time.

[0073] Diluent is fed into the online dilution device 5 and the emergency dosing device (i.e., emergency water pipe 8) from the emergency water supply tank 11. By adjusting the opening of the flow valve, the allowable flow rates of diluent in the diluent inlet pipe 503 and the emergency water pipe 8 are maintained at the same level in real time.

[0074] The emergency dosing device is either disconnected or connected via a second normally open solenoid valve 702 and a third normally open solenoid valve 802.

[0075] (4) In the case of non-emergency dosing, the first normally open solenoid valve 201, the second normally open solenoid valve 702, the third normally open solenoid valve 802 and the fourth normally open solenoid valve 1101 are closed by powering on, and the mother liquor is diluted by the online dilution device 5 to complete the dosing of the medicine. In the event of an emergency dosing operation, after a power outage, the first normally open solenoid valve 201, the second normally open solenoid valve 702, the third normally open solenoid valve 802, and the fourth normally open solenoid valve 1101 are opened. All shut-off valves are closed, and all flow valves maintain the opening degree at the time of the power outage. The mother liquor is diluted by the online dilution device 5 to complete the dosing. In this embodiment, during emergency dosing, a diluent with the same flow rate and concentration as at the time of the power outage is added to the water treatment tank, ensuring the accuracy of the emergency dosing speed and concentration, and guaranteeing that the water treatment effect under emergency dosing conditions is almost identical to that under normal dosing conditions.

[0076] Example 4

[0077] The structure of the drug dispensing system in this embodiment is as follows: Figure 6 , 7 As shown, its basic structure is the same as that of Embodiment 1, except that this embodiment also includes a mother liquor supply device 14, which is a mother liquor tank 1401. A mother liquor conveying main pipe 13 is provided at the outlet of the mother liquor supply device 14. Two replenishment tank inlet pipes 1 are connected to the rear end of the mother liquor conveying main pipe 13. Each replenishment tank inlet pipe 1 has a mother liquor tank 2, a mother liquor pipe 3, an online dilution device 5, and a diluent dosing pipe 6 sequentially arranged at its rear end. Each mother liquor pipe 3 has an emergency mother liquor pipe 7 and an emergency dosing pipe 10 sequentially arranged at its rear end. In this embodiment, the two diluent dosing pipes 6 are used for non-emergency dosing of the two water treatment tanks, and the two emergency dosing pipes 10 are used for emergency dosing of the two water treatment tanks.

[0078] The dosing method of the chemical solution in this embodiment is the same as that in Embodiment 1. Through this embodiment, chemical solutions (i.e., diluents) of different flow rates and concentrations can be added to two water treatment tanks independently. In case of emergency dosing, different flow rates of mother liquor can be added to the two water treatment tanks independently, ensuring the water treatment effect even when the process requirements of the two water treatment tanks are different.

[0079] Example 5

[0080] The structure of the drug dispensing system in this embodiment is as follows: Figure 8As shown, its basic structure is the same as that of Embodiment 4, except that: the mother liquor supply device 14 is a mother liquor quantitative dosing system, which includes an opening device 1402. A hopper 1403 is located at the outlet of the opening device 1402. A stirring device and an air injection device 1404 are installed in the hopper 1403 to prevent the medicine from caking inside the hopper 1403. A discharge device is located below the hopper 1403, and a medicine metering device 1406 is located below the discharge device. A mixing and dissolving device 1407 is located at the outlet of the medicine metering device 1406. The inlet of the mixing and dissolving device 1407 is connected to the medicine metering device 1406, and a solution-dissolving water inlet pipe 1405 is also installed at the inlet of the mixing and dissolving device 1407. The outlet of the mixing and dissolving device 1407 is connected to the mother liquor conveying main pipe 13.

[0081] The solution water inlet pipe 1405 is sequentially equipped with a seventh shut-off valve 14051, a check valve 14052, a solution water flow valve 14053, a solution water flow meter 14054, and an eighth shut-off valve 14055. The solution water flow meter 14054 is electrically connected to the input terminal of the controller, and the solution water flow valve 14053 is electrically connected to the output terminal of the controller.

[0082] In this embodiment, a mother liquor with controllable concentration can be automatically prepared through a mother liquor quantitative dosing system.

[0083] Example 6

[0084] The basic structure of the drug dosing system in this embodiment is the same as that in Embodiment 2, except that this embodiment also includes a mother liquor supply device 14. A mother liquor conveying main pipe 13 is provided at the outlet of the mother liquor supply device 14, and the rear end of the mother liquor conveying main pipe 13 is connected to the liquid inlet pipe 1 of the replenishment tank. The mother liquor supply device 14 is the same as the mother liquor quantitative drug preparation system in Embodiment 5.

[0085] This embodiment also provides a control system for the drug dosing system, the structure of which is as follows: Figure 9 As shown. Its specific structure is as follows: The controller's input terminal is connected to a mother liquor inlet flow meter 5013, and its output terminal is connected to a mother liquor inlet flow valve 5012 and an emergency mother liquor flow valve 701. The mother liquor inlet flow meter 5013 is used to detect the flow rate of the mother liquor during dilution; the mother liquor inlet flow valve 5012 is used to regulate the flow rate of the mother liquor during dilution; and the emergency mother liquor flow valve 701 is used to regulate the flow rate of the mother liquor during emergency drug addition. The controller synchronously adjusts the opening of the mother liquor inlet flow valve 5012 and the emergency mother liquor flow valve 701 based on the input signal from the mother liquor inlet flow meter 5013, thereby ensuring that the flow rate of the added mother liquor remains consistent with the flow rate at the time of power failure during emergency drug addition.

[0086] As a preferred embodiment, the controller's input terminal is connected to a dilution water flow meter 5033, and the controller's output terminal is connected to a dilution water flow valve 5032 and an emergency water flow valve 801. The dilution water flow meter 5033 is used to detect the flow rate of dilution water during the mother liquor dilution process; the dilution water flow valve 5032 is used to adjust the flow rate of dilution water during the mother liquor dilution process; the emergency water flow valve 801 is used to adjust the flow rate of dilution water during the emergency addition of the drug solution. The controller synchronously adjusts the opening degree of the dilution water flow valve 5032 and the emergency water flow valve 801 according to the input signal of the dilution water flow meter 5033, thereby ensuring that the flow rate of the added dilution water remains consistent with the time of power failure in the event of emergency drug addition, and thus ensuring that the concentration of the added drug solution (i.e., the diluent) remains consistent with the time of power failure.

[0087] In a preferred embodiment, the controller's input is connected to a dispensing water flow meter 14054, and its output is connected to a dispensing water flow valve 14053 and a reagent metering device 1406. The dispensing water flow meter 14054 detects the flow rate of the dispensing water during mother liquor preparation; the dispensing water flow valve 14053 regulates the flow rate of the dispensing water during mother liquor preparation; the reagent metering device 1406 regulates the amount of reagent added during mother liquor preparation; and the controller adjusts the opening of the dispensing water flow valve 14053 based on the input signal from the dispensing water flow meter 14054. This preferred embodiment enables the automatic preparation of mother liquor with controllable concentration.

[0088] As a preferred embodiment, the controller's input terminal is connected to a process parameter input device, which is used to input at least one of the following: raw water turbidity, mother liquor concentration, mother liquor flow rate, or dilution water flow rate. When the input process parameter is raw water turbidity, the process parameter input device is a raw water turbidity detection device, and the controller can automatically calculate the required process parameters such as mother liquor concentration, dilution concentration, and dilution addition rate based on the detected raw water turbidity and the requirements of existing water treatment processes. When the input process parameter is mother liquor concentration, mother liquor flow rate, or dilution water flow rate, the process parameter input device is at least one of a touch screen, input buttons, or a mouse.

[0089] As a preferred embodiment, the output of the controller is also connected to a power module; the power module is used to cut off or connect the power supply to the first normally open solenoid valve 201, the second normally open solenoid valve 702, the third normally open solenoid valve 802, and the fourth normally open solenoid valve 1101. This preferred embodiment enables the manual cutting off of the power supply to each normally open solenoid valve to open it in the event of a non-accidental power outage (e.g., equipment failure), thereby facilitating emergency chemical dosing.

[0090] As can be seen from the above embodiments, the chemical dosing system, method, and control system provided by the present invention can realize the emergency dosing function of chemical solutions in water treatment processes. Furthermore, the emergency dosing process of the present invention can ensure that the dosing rate and / or concentration of the chemical solution are maintained at the level at the time of power failure, thereby ensuring that the water treatment effect during emergency dosing is the same as that under non-emergency dosing conditions. In addition, in the present invention, the chemical solution used for emergency dosing is stored as a high-concentration mother liquor, overcoming the problem of hydrolysis and deterioration of the chemical solution during long-term storage in emergency dosing.

Claims

1. A drug dispensing system capable of improving drug efficacy and equipped with an emergency fluid replenishment device, characterized in that, The system includes a mother liquor tank (2) for setting near the dosing point of the water treatment tank, an online dilution device (5), and a controller. The mother liquor tank (2) is connected to the front end of the online dilution device (5) through a mother liquor inlet pipe (501). The front end of the online dilution device (5) is also provided with a dilution water inlet pipe (503). The rear end of the online dilution device (5) is provided with a dilution solution dosing pipe (6) for adding chemicals to the water treatment tank. The online dilution device (5) is electrically connected to the controller. It also includes an emergency mother liquor pipe (7), the mother liquor tank (2) is connected to the emergency mother liquor pipe (7) through the mother liquor pipe (3), the emergency mother liquor pipe (7) is connected to an emergency mother liquor flow valve (701) and a second normally open solenoid valve (702), and the second normally open solenoid valve (702) is connected to the emergency dosing pipe (10). The mother liquor inlet pipe (501) is equipped with a mother liquor inlet flow valve (5012) and a mother liquor inlet flow meter (5013). The mother liquor inlet flow meter (5013) is electrically connected to the input terminal of the controller, and the mother liquor inlet flow valve (5012) is electrically connected to the output terminal of the controller. The output of the controller is connected to the emergency mother liquor flow valve (701); The mother liquor inlet flow meter (5013) is used to detect the flow rate of the mother liquor during the dilution process; The mother liquor inlet flow valve (5012) is used to regulate the flow rate of the mother liquor during the dilution process. The emergency mother liquor flow valve (701) is used to regulate the flow rate of the mother liquor during the emergency addition of the medicine; The controller synchronously adjusts the opening degree of the mother liquor inlet flow valve (5012) and the emergency mother liquor flow valve (701) according to the input signal of the mother liquor inlet flow meter (5013); It also includes an emergency water supply tank (11), an emergency water pipe (8), and an emergency dilution device (9). The outlet of the emergency water supply tank (11) is provided with a water supply tank outlet pipe (4), which is connected to the dilution water inlet pipe (503) and the emergency water pipe (8) respectively. The dilution water inlet pipe (503) is equipped with a dilution water flow control device, and the emergency water pipe (8) is equipped with an emergency water flow valve (801) and a third normally open solenoid valve (802). The dilution water flow control device is electrically connected to the controller, and the emergency water flow valve (801) is electrically connected to the output terminal of the controller. A water inlet backup bypass (504) is connected in parallel on the dilution water inlet pipe (503), and at least one shut-off valve is provided on the water inlet backup bypass (504); A mother liquor backup bypass (502) is connected in parallel on the mother liquor inlet pipe (501), and at least one shut-off valve is provided on the mother liquor backup bypass (502). The rear end of the emergency mother liquor pipe (7) and the rear end of the emergency water pipe (8) are connected to the emergency dilution device (9), and the rear end of the emergency dilution device (9) is provided with an emergency dosing pipe (10) for adding chemicals to the water treatment tank. The input terminal of the controller is connected to a dilution water flow meter (5033), and the output terminal of the controller is connected to a dilution water flow valve (5032) and an emergency water flow valve (801). The dilution water flow meter (5033) is used to detect the flow rate of dilution water during the dilution process of the mother liquor; The dilution water flow valve (5032) is used to regulate the flow rate of dilution water during the dilution process of the mother liquor; The emergency water flow valve (801) is used to regulate the flow rate of dilution water during the emergency addition of the medicine solution; The controller synchronously adjusts the opening degree of the dilution water flow valve and the emergency water flow valve (801) according to the input signal of the dilution water flow meter (5033); The emergency mother liquor flow valve (701) and the emergency water flow valve (801) can be adjusted by the controller when energized, and maintain the opening degree at the time of power failure when de-energized.

2. The drug dosing system according to claim 1, characterized in that: The outlet of the emergency water supply tank (11) is located at the bottom of the emergency water supply tank (11), and an air inlet pipe is provided at the top of the emergency water supply tank (11). A fourth normally open solenoid valve (1101) is provided on the air inlet pipe. And / or, at least one shut-off valve is provided on the dilution water inlet pipe (503); And / or, the dilution water flow control device includes a dilution water flow valve (5032) and a dilution water flow meter (5033), the dilution water flow meter (5033) being electrically connected to the input terminal of the controller, and the dilution water flow valve (5032) being electrically connected to the output terminal of the controller.

3. The drug dosing system according to claim 2, characterized in that: The dilution water inlet pipe (503) and the emergency water pipe (8) have the same diameter; Alternatively, the dilution water flow control device is a metering pump, and the metering pump is electrically connected to the output terminal of the controller.

4. The drug dosing system according to claim 1, characterized in that: The mother liquor inlet pipe (501) and the emergency mother liquor pipe (7) have the same diameter.

5. The drug dosing system according to claim 1, characterized in that: The emergency mother liquor pipe (7) is connected to an emergency dosing pipe (10) for adding chemicals to the water treatment tank at its rear end; Alternatively, the online dilution device (5) includes a first mixer (505), the rear end of which is connected to the diluent dosing pipe (6), and the rear end of the emergency mother liquor pipe (7) is connected to the first mixer (505).

6. The drug dosing system according to claim 1, characterized in that: The outlet of the mother liquor tank (2) is located at the bottom of the mother liquor tank (2), and an air inlet pipe is provided at the top of the mother liquor tank (2). A first normally open solenoid valve (201) is provided on the air inlet pipe.

7. The drug dosing system according to claim 1, characterized in that: At least one shut-off valve is provided on the mother liquor inlet pipe (501).

8. The drug dosing system according to claim 1, characterized in that: It also includes a mother liquor supply device (14), the outlet of which is provided with a mother liquor conveying main pipe (13), and the inlet of the mother liquor tank (2) is provided with a replenishment tank inlet pipe (1), and the mother liquor conveying main pipe (13) is connected to the replenishment tank inlet pipe (1).

9. The drug dosing system according to claim 8, characterized in that: The rear end of the main mother liquor delivery pipe (13) is connected to at least two replenishment tank inlet pipes (1). Each replenishment tank inlet pipe (1) is sequentially provided with a mother liquor tank (2), a mother liquor pipe (3), an online dilution device (5), and a diluent dosing pipe (6). Each mother liquor pipe (3) is connected to an emergency mother liquor pipe (7).

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