A uniform drug delivery system and a control method thereof

Abstract

This invention provides a uniform drug delivery system and its control method. The uniform drug delivery system includes a feeding mechanism, a mixer, and a drug delivery mechanism. The feeding mechanism includes at least two raw material tanks, each containing a different concentrate. The concentrates from the different raw material tanks are respectively delivered to the mixer via different feed pumps. The mixer is connected to the raw material tanks via connecting pipes and is used to uniformly mix the concentrates from the at least two raw material tanks. The drug delivery mechanism includes a drug delivery pipeline and multiple pressure compensation nozzles. The drug delivery pipeline is connected to the mixer, and the uniformly mixed concentrate is sequentially led to the structure through the drug delivery pipeline and the pressure compensation nozzles. This invention enables the drug to be uniformly added to the structure from different dosing ports on the drug delivery pipeline, meeting the dosage requirements of each dosing port and avoiding the problems of excessive dosage and drug waste caused by uneven dosing at each dosing port.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a uniform chemical distribution system and its control method. Background Technology

[0002] Urban wastewater treatment processes are generally determined based on the utilization or discharge destination of urban wastewater and the natural purification capacity of water bodies to determine the degree of wastewater treatment and the corresponding treatment processes. Modern wastewater treatment technologies, classified by the degree of treatment, can be divided into primary treatment (physical treatment such as screens and sedimentation tanks), secondary treatment (biological treatment), and tertiary treatment (advanced treatment), etc. Each level includes one or more stages, and each stage is equipped with wastewater treatment structures.

[0003] Some structures require the addition of chemicals to achieve their functions. For example, coagulation sedimentation tanks require the addition of coagulants and coagulant aids. The existing dosing method is generally as follows: a dosing pump is used to add chemicals through a water distribution pipeline. Often, multiple perforated pipes or multiple faucets are installed on the same cross-section of the water distribution pipeline to form multiple dosing ports. Since the distance between each perforated pipe or faucet and the dosing pump is different, the pressure at each dosing port is also different, resulting in uneven dosing at different dosing ports. In order to meet the dosing requirements of each dosing port, overdosing is often caused, resulting in chemical waste. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a uniform drug distribution system and its control method to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides a uniform drug delivery system, comprising a feeding mechanism, a mixer, and a drug delivery mechanism;

[0006] The feeding mechanism includes at least two raw material pools, each containing a different stock solution. The stock solutions from the different raw material pools are respectively transported to the mixer by different feeding pumps. Each feeding pump is equipped with a frequency converter, which is used to control the flow rate of the feeding pump.

[0007] The mixer is connected to the raw material tank via a connecting pipe, and the mixer is used to mix the raw liquid from at least two of the raw material tanks evenly;

[0008] The drug delivery mechanism includes a drug delivery pipeline and multiple pressure compensation nozzles installed on the drug delivery pipeline. The drug delivery pipeline is connected to the mixer. The stock solution, which is uniformly mixed by the mixer, is sequentially led into the structure through the drug delivery pipeline and the pressure compensation nozzles.

[0009] The beneficial effects of this invention are as follows: By setting up a feeding mechanism, a mixer, and a drug distribution mechanism, when it is necessary to add a drug to a structure, the raw liquids, such as drug stock solutions, from at least two raw material pools in the feeding mechanism are transported to the mixer through connecting pipelines by a feeding pump. The mixer is used to mix at least two drug stock solutions evenly to obtain the required drug. The evenly mixed drug is then transported along the drug distribution pipeline and led into the structure through different pressure compensation nozzles set on the drug distribution pipeline. This allows the drug to be evenly added to the structure from different dosing ports on the drug distribution pipeline, meeting the dosage requirements of each dosing port and avoiding the problem of excessive dosage and drug waste caused by uneven dosing at each dosing port.

[0010] Preferably, the feed pump is installed on the connecting pipe, and the connecting pipe is equipped with a control valve. The control valve is used to control the flow in the connecting pipe, and the raw liquid in the raw material pool is sequentially transported to the mixer through the control valve and the feed pump.

[0011] Preferably, a filter is provided on the connecting pipe for filtering the raw liquid, and the filter is located between the control valve and the feed pump.

[0012] Preferably, a check valve is provided on the connecting pipe, the check valve is located between the mixer and the feed pump, and the check valve is used to prevent the original liquid in the connecting pipe from flowing back.

[0013] Preferably, an electromagnetic flow meter is provided on the connecting pipe, and the electromagnetic flow meter is used to observe the flow rate of the original liquid in the connecting pipe.

[0014] Preferably, both ends of the drug delivery pipeline are equipped with vent valves, which are used to depressurize the drug delivery pipeline.

[0015] Preferably, the filter includes a filter disc and a drive assembly. The filter disc is located inside the connecting pipe and is rotatably connected to the connecting pipe. The drive assembly is connected to the filter disc and drives the filter disc to rotate, thereby using centrifugal force to filter the raw liquid.

[0016] Preferably, the driving assembly includes a rotating sleeve and a driving motor. The rotating sleeve is sleeved on the outside of the connecting pipe and connected to the filter disc through a connecting structure. The drive shaft of the driving motor is connected to the rotating sleeve through a gear structure so that the driving motor drives the rotating sleeve to rotate.

[0017] Preferably, the pressure-compensating nozzle includes a nozzle body, a fan blade, and a folding plate. The fan blade is rotatably connected to the nozzle body, and the folding plate is connected to the connecting pipe via a compression spring. The folding plate is formed by multiple folded pieces connected in a cross manner, and the multiple folded pieces are connected by a pivot shaft so that the folding plate can be folded relative to each other with the pivot shaft as the central axis.

[0018] To achieve the above objectives, the present invention also provides a control method for a uniform drug delivery system, applied to the uniform drug delivery system described above, characterized in that the control method includes:

[0019] Adjust the frequency converter of the feed pump to control the flow rate of the feed pump when it draws the raw liquid from the raw material tank into the mixer;

[0020] The mixer is used to mix the stock solutions from at least two of the raw material tanks evenly to obtain a mixture.

[0021] The mixture is delivered to the pressure-compensating nozzle via a drug delivery pipeline;

[0022] The flow rate of the mixture is controlled by the pressure-compensating nozzle so that the flow rate of the mixture is consistent with the flow rate controlled by the frequency converter, and then the mixture is directed into the structure.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the uniform drug distribution system provided in the first embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the filter provided in the first embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the pressure compensation nozzle provided in the first embodiment of the present invention.

[0027] Figure 4 A flowchart of a control method for a uniform drug distribution system provided in the second embodiment of the present invention.

[0028] Explanation of key component symbols:

[0029] 10. Raw material tank; 20. Mixer; 30. Connecting pipeline; 31. Feed pump; 32. Control valve; 33. Filter; 311. Filter disc; 312. Filter hole; 313. Guide groove; 314. Rotating sleeve; 315. Drive motor; 316. Gear structure; 317. Mounting platform; 34. Check valve; 35. Electromagnetic flow meter; 36. Collection tank; 37. Filter bag; 38. Drainage groove; 39. Sealing plate; 40. Step; 41. Drug distribution pipeline; 42. Pressure compensation nozzle; 421. Nozzle body; 422. Fan blade; 423. Folding plate; 424. Rotating shaft; 425. Compression spring; 426. Through hole; 427. Turbulent flow channel; 43. Vent valve; 50. Structure.

[0030] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figures 1 to 3 The uniform drug distribution system in the first embodiment of the present invention includes a feeding mechanism, a mixer 20 and a drug distribution mechanism.

[0035] The feeding mechanism includes two raw material pools 10, each containing a different stock solution. One raw material pool 10 contains a pharmaceutical stock solution, while the other contains clean water. Understandably, the stock solutions in the two raw material pools 10 are respectively transported to the mixer 20 by different feeding pumps 31. In order to adjust the flow rate of the stock solution during transport, a frequency converter is installed on each feeding pump 31 to control the flow rate of the feeding pump 31, thereby controlling the transport speed of the stock solution.

[0036] The mixer 20 is connected to each raw material tank 10 through the connecting pipe 30. The raw liquid in each raw material tank 10 flows into the mixer 20 through the connecting pipe 30 so that the mixer 20 mixes the drug stock solution and water to obtain the drug of the required concentration. It should be noted that the connecting pipe 30 has a Y-shaped structure and includes a first branch, a second branch and a third branch. One end of the first branch and the second branch are connected to the third branch. The first branch and the second branch are used to transport the drug stock solution and water, respectively. The drug stock solution and water flowing through the first branch and the second branch converge into the third branch and are then transported to the mixer 20.

[0037] The drug distribution mechanism includes a drug distribution pipeline 41 and multiple pressure compensation nozzles 42 installed on the drug distribution pipeline 41. The drug distribution pipeline 41 is connected to a mixer 20. The uniformly mixed agent is introduced into the structure 50 through the drug distribution pipeline 41 and the pressure compensation nozzles 42 in sequence to achieve uniform drug distribution.

[0038] In this embodiment, two feed pumps 31 are installed on the first branch and the second branch respectively to control the delivery of the drug concentrate and water. The first branch and the second branch are equipped with control valves 32 and filters 33. The control valve 32 is used to control the flow of the first branch or the second branch, and the opening and closing of the control valve 32 is synchronized with the feed pump 31 on the corresponding branch. The filter 33 is used to filter the concentrate flowing through each branch to avoid the blockage of the subsequent pipeline. It should be noted that the filter 33 is located between the control valve 32 and the feed pump 31. The concentrate in the raw material tank 10 will be delivered to the mixer 20 in sequence through the control valve 32, the filter 33 and the feed pump 31.

[0039] In this embodiment, a check valve 34 and an electromagnetic flow meter 35 are installed on both the first and second branches. Each check valve 34 is used to prevent the backflow of the raw liquid in the corresponding branch. The check valve 34 and the electromagnetic flow meter 35 are both located between the mixer 20 and the feed pump 31. The electromagnetic flow meter 35 is used to monitor the flow rate in the corresponding branch. The frequency converter is adjusted according to the flow data displayed by the electromagnetic flow meter 35 to accurately adjust the flow rate of the feed pump 31.

[0040] In this embodiment, both ends of the drug delivery pipeline 41 are equipped with vent valves 43, which are used to depressurize the drug delivery pipeline. Multiple pressure-compensating nozzles 42 are located between two vent valves 43. The drug delivery pipeline 41 has an inverted T-shaped structure and includes a first pipe and a second pipe. One end of the first pipe is connected to the mixer 20, and the other end is connected to the middle of the second pipe. The second pipe lies horizontally above the structure 50, and multiple pressure-compensating nozzles 42 are located on the same cross-section of the second pipe, with the same distance between adjacent pressure-compensating nozzles 42. It is understood that the two vent valves 43 are located at opposite ends of the second pipe.

[0041] In this embodiment, the filter 33 includes a filter disc 311 and a drive assembly. The filter disc 311 is located inside the connecting pipe and is rotatably connected to the connecting pipe. The drive assembly is connected to the filter disc 311 and can drive the filter disc 311 to rotate so as to filter the original liquid by centrifugal force. At this time, the filtered residue will also be thrown to the edge of the filter disc 311 by centrifugal force.

[0042] It should be noted that the filter disc 311 includes an integrally connected central disc and a guide ring. The central axis of the central disc and the central axis of the guide ring are on the same straight line. One end of the guide ring is inclined downward relative to the central disc. The central disc and the guide ring together form a frustum-shaped cavity. When the filter disc 311 is installed in the connecting pipe, the end of the guide ring away from the central disc contacts the inner wall of the connecting pipe. Understandably, to ensure the flow of the raw liquid, several filter holes 312 are provided on the central disc. The raw liquid in the connecting pipe flows through the filter holes 312. A guide groove 313 is provided on the guide ring. Impurities filtered out by the guide groove 313 gradually fall into the guide groove 313 under centrifugal force and remain within the guide groove 313, rotating with the filter disc 311.

[0043] To prevent filtered impurities from affecting the flow rate of the original liquid in the connecting pipe, a collection groove 36 is provided on the inner wall of the connecting pipe. A filter bag 37 is detachably installed in the collection groove 36. When the filter disc 311 rotates to a certain position, the guide groove 313 can communicate with the collection groove 36. At this time, the filtered impurities fall into the filter bag 37 under the action of centrifugation and the action of the center of gravity. To prevent water from accumulating in the collection groove 36, a drainage groove 38 is provided at the bottom of the collection groove 36 so that the collection groove 36 can flow with the connecting pipe through the drainage groove 38.

[0044] In this embodiment, a groove is provided on the connecting pipe, which communicates with the receiving groove 36. A sealing plate 39 is movably connected within the groove, sealing the groove to ensure its airtightness. The bottom of the groove is located above the bottom of the receiving groove 36, forming a step 40 between the groove and the receiving groove 36, further preventing the original liquid from overflowing outside the connecting pipe. It is understood that the filter bag 37 can be cleaned by removing the sealing plate 39 from the groove and then removing it through the groove.

[0045] In this embodiment, the drive assembly includes a rotating sleeve 314 and a drive motor 315. The rotating sleeve 314 is sleeved on the outside of the connecting pipe 30. The rotating sleeve 314 is connected to the filter disc 311 through a connecting structure. The drive shaft of the drive motor 315 is connected to the rotating sleeve 314 through a gear structure 316, so that the drive motor 315 drives the rotating sleeve 314 to rotate.

[0046] Specifically, the connecting structure includes a connecting rod and a snap-fit ​​buckle. A displacement groove is formed on the inner wall of the connecting pipe, extending circumferentially along the connecting pipe. One end of the connecting rod is fixedly connected to the side wall of the central disc, and the other end is inserted into the displacement groove of the connecting pipe. One end of the snap-fit ​​buckle is connected to the rotating sleeve 314, and the other end is snapped into the connecting rod. The gear structure 316 includes a first gear and a second gear for meshing transmission. The first gear is sleeved on the outside of the rotating sleeve 314, and the second gear is fixedly connected to the drive shaft of the drive motor 315. The drive motor 315 is connected to the outer wall of the connecting pipe through the mounting platform 317.

[0047] Understandably, the drive motor 315 drives the second gear to rotate, and the second gear meshes with the first gear to drive the rotating sleeve 314 to rotate synchronously, so that the rotating sleeve 314 drives the filter disc 311 to rotate through the connecting structure.

[0048] In this embodiment, the pressure-compensating nozzle 42 includes a nozzle body 421, fan blades 422, and a folding plate 423. Both the fan blades 422 and the folding plate 423 are located inside the nozzle body 421. There are four fan blades 422, which are connected by a receiving block and are distributed at equal angles around the circumference of the receiving block. The four fan blades 422 are rotatably connected to the connecting pipe through the receiving block. The folding plate 423 is formed by multiple folded pieces that are cross-connected. Each of the multiple folded pieces is divided into two parts, and the two parts of the folded pieces are integrally connected to form two semi-circular structures. The two semi-circular structures are connected by a rotating shaft 424 so that the two semi-circular structures can be folded relative to each other or folded towards each other with the rotating shaft 424 as the central axis.

[0049] Understandably, the folding plate 423 is fixedly connected to the connecting pipe via a compression spring 425. That is, both semi-circular structures are connected to the connecting pipe via compression springs 425. When the compression spring 425 is in its initial state without external force, the two semi-circular structures are inclined and intersecting, leaving a gap at the intersection. When the pressure in the pressure compensation nozzle 42 is too high, the flow rate of the agent is faster, driving the fan blade 422 to rotate. The fan blade 422 drives the surrounding liquid flow, causing the two semi-circular structures to fold towards each other. The angle between the two semi-circular structures gradually increases, and the gap at the intersection gradually decreases, reducing the cross-sectional area left at the outlet and correspondingly reducing the water flow, thus controlling the flow rate of the pressure compensation nozzle 42. At this time, the compression spring 425 is in a stretched state, and the side wall of the folding plate 423 is in contact with the inner wall of the connecting pipe. It should be noted that the folding plate 423 has multiple perforations, allowing the liquid in the pressure compensation nozzle 42 to flow out.

[0050] In this embodiment, a turbulent flow channel 427 is provided inside the nozzle body 421. The raw liquid flowing out through the folding plate 423 needs to flow through the turbulent flow channel 427 to form turbulence, thereby playing a role in secondary pressure reduction and energy dissipation and reducing flow velocity, ensuring the stability of the outflow from the nozzle body 421. Finally, when the amount of agent flowing out of the pressure-compensated nozzle 42 decreases, the flow velocity of the agent located on the side of the folding plate 423 near the fan blade 422 decreases, making it unable to drive the fan blade 422 to rotate. Under the action of the compression spring 425, the folding plate 423 is forced to return to its initial position, gradually increasing the gap at the intersection of the two semi-circular structures, thereby restoring normal outflow and playing a role in compensating for pressure and flow rate, ensuring the uniformity and stability of the outflow.

[0051] In practical implementation, when it is necessary to add a chemical agent to the structure 50, the raw liquid, such as the chemical agent stock solution, from at least two raw material tanks 10 in the feeding mechanism is transported to the mixer 20 through the connecting pipeline 30 by the feeding pump 31. The mixer 20 is used to mix at least two chemical agent stock solutions evenly to obtain the required chemical agent. The evenly mixed chemical agent is then transported along the distribution pipeline 41 and led to the structure 50 through different pressure compensation nozzles 42 installed on the distribution pipeline 41. This ensures that the chemical agent can be evenly added to the structure 50 from different dosing ports on the distribution pipeline 41, meeting the dosage requirements of each dosing port and avoiding the problem of excessive dosage and chemical waste caused by uneven dosing at each dosing port.

[0052] It should be noted that the above implementation process is only to illustrate the feasibility of this application, but it does not mean that the uniform drug distribution system of this application has only the above-mentioned unique implementation process. On the contrary, as long as the uniform drug distribution system of this application can be implemented, it can be included in the feasible implementation scheme of this application.

[0053] Please refer to 4. The second embodiment of the present invention provides a control method for a uniform drug distribution system, applied to the uniform drug distribution system in the first embodiment. The control method includes the following steps:

[0054] Step S101: Adjust the frequency converter of the feed pump 31 to control the flow rate of the feed pump 31 when it draws the raw liquid from the raw material tank 10 into the mixer 20.

[0055] Step S102: The raw liquid from at least two of the raw material tanks 10 is mixed evenly using the mixer 20 to obtain a mixture;

[0056] Step S103: The mixture is delivered to the pressure compensation nozzle 42 through the drug delivery pipeline 41;

[0057] In step S104, the flow rate of the mixture is controlled by the pressure compensation nozzle 42 so that the flow rate of the mixture is consistent with the flow rate controlled by the frequency converter, and then the mixture is directed into the structure 50.

[0058] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A uniform drug delivery system, characterized in that, Includes a feeding mechanism, a mixer, and a drug delivery mechanism; The feeding mechanism includes at least two raw material pools, each containing a different stock solution. The stock solutions from the different raw material pools are respectively transported to the mixer by different feeding pumps. Each feeding pump is equipped with a frequency converter, which is used to control the flow rate of the feeding pump. The mixer is connected to the raw material tank via a connecting pipe, and the mixer is used to mix the raw liquid from at least two of the raw material tanks evenly; The drug delivery mechanism includes a drug delivery pipeline and multiple pressure-compensating nozzles disposed on the drug delivery pipeline. The drug delivery pipeline is connected to the mixer. The uniformly mixed stock solution is sequentially led into the structure through the drug delivery pipeline and the pressure-compensating nozzles. The pressure-compensating nozzle includes a nozzle body, a fan blade, and a folding plate. The fan blade is rotatably connected to the nozzle body. The folding plate is connected to the connecting pipe through a compression spring. The folding plate is formed by multiple folded pieces connected in a cross manner. The multiple folded pieces are connected by a pivot shaft so that the folding plate can be folded relative to each other with the pivot shaft as the central axis.

2. The uniform drug distribution system according to claim 1, characterized in that, The feed pump is installed on the connecting pipe, and the connecting pipe is equipped with a control valve. The control valve is used to control the flow in the connecting pipe. The raw liquid in the raw material pool is sequentially transported to the mixer through the control valve and the feed pump.

3. The uniform drug distribution system according to claim 2, characterized in that, A filter is installed on the connecting pipe, which is used to filter the raw liquid. The filter is located between the control valve and the feed pump.

4. The uniform drug distribution system according to claim 1, characterized in that, A check valve is provided on the connecting pipe, which is located between the mixer and the feed pump. The check valve is used to prevent the original liquid from flowing back in the connecting pipe.

5. The uniform drug distribution system according to claim 1, characterized in that, An electromagnetic flow meter is installed on the connecting pipe, and the electromagnetic flow meter is used to observe the flow rate of the original liquid in the connecting pipe.

6. The uniform drug distribution system according to claim 1, characterized in that, Both ends of the drug delivery pipeline are equipped with vent valves, which are used to release pressure from the drug delivery pipeline.

7. The uniform drug distribution system according to claim 3, characterized in that, The filter includes a filter disc and a drive assembly. The filter disc is located inside the connecting pipe and is rotatably connected to the connecting pipe. The drive assembly is connected to the filter disc and drives the filter disc to rotate, thereby using centrifugal force to filter the raw liquid.

8. The uniform drug distribution system according to claim 7, characterized in that, The drive assembly includes a rotating sleeve and a drive motor. The rotating sleeve is sleeved on the outside of the connecting pipe and is connected to the filter disc through a connecting structure. The drive shaft of the drive motor is connected to the rotating sleeve through a gear structure so that the drive motor drives the rotating sleeve to rotate.

9. A control method for a uniform drug delivery system, applied to the uniform drug delivery system according to any one of claims 1 to 8, characterized in that, The control method includes: Adjust the frequency converter of the feed pump to control the flow rate of the feed pump when it draws the raw liquid from the raw material tank into the mixer; The mixer is used to mix the stock solutions from at least two of the raw material tanks evenly to obtain a mixture. The mixture is delivered to the pressure-compensating nozzle via a drug delivery pipeline; The flow rate of the mixture is controlled by the pressure-compensating nozzle so that the flow rate of the mixture is consistent with the flow rate controlled by the frequency converter, and then the mixture is directed into the structure.

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