A water treatment agent dosing device and method thereof

Abstract

This invention discloses a water treatment agent dosing device and method, relating to the field of wastewater treatment. The device includes a spiral pusher, a dosing tank, a main inlet pipe, and a level gauge. A premixing inlet with an inclined discharge trough and a filter screen is incorporated, along with an eccentrically positioned extrusion wheel. During the agent's descent, it is automatically sieved, and the extrusion wheel mechanically breaks up any clumps formed due to moisture. The dosing tank is divided into an upper premixing chamber and a lower dosing chamber. A fixed amount of agent and a small flow rate of liquid to be treated are introduced into the premixing chamber, pre-treating the agent before it enters the main treatment tank. The opening of the discharge slit from the premixed agent to the main treatment tank is adjusted by the stroke of a cylinder, thereby achieving flow rate regulation from dripping to full opening, meeting the precise control requirements for agent dosing rate under different operating conditions.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and in particular to a water treatment agent dosing device and method. Background Technology

[0002] In wastewater treatment, the precise addition of chemical agents to the water body is a crucial step. Traditional methods of agent addition are mainly divided into dry dosing and wet dosing.

[0003] Dry dosing involves directly spraying powdered agents into the treatment equipment, which generates dust pollution. Furthermore, the agents are prone to clumping due to moisture, causing blockages at the dosing port. Additionally, dry powder agents are difficult to disperse quickly and evenly when they enter a large body of water, easily forming localized high-concentration clumps, resulting in incomplete reactions and low agent utilization.

[0004] Wet dosing involves preparing the reagent into a solution before adding it. However, traditional dissolving devices have limited ability to handle reagent clumping. Clumps tend to deposit at the bottom of the dissolving tank, affecting the concentration and dosing accuracy. The prepared chemical solution is usually added to the main treatment process all at once through a pump or valve with a fixed flow rate. When the water quality fluctuates greatly or is close to the critical point of compliance, the fixed addition mode may either lead to excessive waste of chemicals or insufficient addition, resulting in substandard water quality.

[0005] Therefore, we propose a water treatment agent dosing device and method to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a water treatment agent dosing device and method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a water treatment agent dosing device, comprising: The screw conveyor has a hopper installed above its feed inlet; The feeding box is connected to a conveying pipe, which is connected to the discharge port of the screw conveyor. A connecting seat is fixedly connected inside the feeding box, and a filter screen is provided at the bottom of the connecting seat. The feeding box is divided into an upper premixing chamber and a lower feeding chamber. A level gauge, which is installed on the processing tank; The drive motor is mounted on the feeding box, and its output end is connected to a connecting rod that passes through the filter screen. An eccentrically set conical extrusion wheel is fixed above the filter screen, and a stirring rod is fixed below the filter screen. The infusion unit includes a first branch for directly injecting the liquid to be treated into the treatment tank and a second branch for injecting the liquid to be treated into the premixing chamber.

[0008] Preferably, the connecting seat has a feeding groove and a through feeding hole, the two ends of which are respectively connected to the conveying pipe and the feeding groove.

[0009] Preferably, the dosing box is further provided with a dividing seat, which is used to divide the dosing box into a premixing chamber and a dosing chamber. The space of the dosing box above the dividing seat is the premixing space, and the space of the dosing box below the dividing seat is the dosing space. An adjusting seat that can move up and down relative to the dividing seat is provided above the dividing seat. The adjusting seat has first liquid dosing holes opened at equal intervals. A sealing block is fixedly connected to the dividing seat corresponding to the first liquid dosing holes. The sealing block has a beveled groove. The dividing seat has a second liquid dosing hole, which is used to cooperate with the first liquid dosing hole to add liquid.

[0010] Preferably, a cylinder is installed on the feeding box, a connecting plate is installed at the output end of the cylinder, an adjusting rod is fixedly connected to the bottom end of the connecting plate, the adjusting rod is inserted into the feeding box and the connecting seat, and the adjusting rod passes through the connecting seat and is fixedly connected to the top end of the adjusting seat.

[0011] Preferably, the first branch includes a main infusion pipe, in which a first solenoid valve is installed. One end of the main infusion pipe is used to connect to a sewage inlet pipe, and the other end of the main infusion pipe is equipped with a second solenoid valve. The end of the second solenoid valve away from the main infusion pipe is equipped with a first connecting pipe, which is installed on the dosing tank and works with the main infusion pipe and the first connecting pipe to transport sewage to the treatment tank.

[0012] Preferably, a branch infusion tube is also connected in parallel to the main infusion tube, and the two ends of the branch infusion tube are respectively connected to the two sides of the first solenoid valve installed on the main infusion tube, and a valve is provided on the branch infusion tube.

[0013] Preferably, the second branch includes a branch pipe branching off from the main infusion pipe, the branch pipe being connected to the premixing chamber of the dosing tank via a second connecting pipe, and a third solenoid valve being provided between the branch pipe and the second connecting pipe.

[0014] Preferably, a cylinder is installed on the feeding box, a connecting plate is installed at the output end of the cylinder, an adjusting rod is fixedly connected to the bottom end of the connecting plate, the adjusting rod is inserted into the feeding box and the connecting seat, and the adjusting rod passes through the connecting seat and is fixedly connected to the top end of the adjusting seat.

[0015] Preferably, it also includes a central controller, which is connected to the electric motor, drive motor, cylinder, solenoid valve in the infusion unit, and water quality monitoring sensor on the spiral pusher, for receiving monitoring data and executing predetermined coarse dispensing control logic and fine dispensing control logic.

[0016] A method of using a water treatment chemical dosing device includes the following steps: S1: Start the screw conveyor and push the metered amount of medicine through the conveying pipe to the discharge chute at the top of the feeding box; S2: Inject the liquid to be treated into the premixing chamber of the dosing tank through the first branch, and start the drive motor at the same time; S3: The agent rolls down the feed chute to the filter screen. Normal particles pass through the filter screen and fall into the liquid in the premixing chamber. Clumped particles are blocked by the filter screen. The drive motor drives the stirring rod to stir to promote mixing. At the same time, it drives the eccentric extrusion wheel to rotate, which crushes the clumped particles stuck on the filter screen and makes them pass through the filter screen. S4: After premixing is completed, the stroke of the control cylinder opens the drain channel, and at the same time, the liquid to be treated is injected into the treatment tank through the second branch. The premixed liquid is discharged into the dosing chamber at a controllable rate and finally enters the treatment tank, where it is mixed synchronously with the mainstream liquid. S5: Based on the water quality data obtained by the monitoring unit, determine whether supplementary addition is needed. If so, repeat the above steps to perform coarse and fine adjustment additions until the water quality meets the standards. In step S4, by precisely controlling the stroke of the cylinder, the opening of the gap between the first liquid injection hole and the inclined groove can be continuously adjusted, thereby realizing the flow rate adjustment from dripping to full opening. When performing coarse adjustment, a larger opening is used for rapid addition, and when performing fine adjustment, a smaller opening is used for slow and precise addition.

[0017] The technical effects and advantages of this invention are as follows: By setting up a premixing inlet with an inclined feeding trough and a filter screen, combined with an eccentrically set extrusion wheel, the agent is automatically screened during the falling process, and the extrusion wheel mechanically breaks up the clumps caused by moisture. The drive motor stirs the liquid and agent while extruding, which solves the clogging problem caused by clumps of agent.

[0018] By dividing the inside of the dosing chamber into an upper premixing chamber and a lower dosing chamber, a quantitative amount of reagent and a small flow rate of liquid to be treated are introduced into the premixing chamber. The reagent is stirred and dissolved before being added, thus pre-treating the reagent before it enters the main treatment chamber. This avoids the problems of instantaneous precipitation, gel encapsulation, and local concentration surges that occur when dry powder or concentrated liquid is directly added to the main fluid.

[0019] By cooperating with the cylinder-driven adjusting seat and the sealing block with the beveled groove, the opening of the discharge gap of the premixed medicine liquid into the main treatment tank is adjusted through the stroke of the cylinder, thereby realizing the flow rate adjustment from dripping to full opening, and meeting the precise control requirements of the drug dosing rate under different working conditions.

[0020] By switching valves in the fluid delivery and control system, two-stage operations are achieved: injecting water into the premixing chamber to prepare the drug and simultaneously adding the premixed liquid and the mainstream liquid to the main treatment tank. This allows the premixed drug solution to be immediately further mixed with a large amount of mainstream fluid when it enters the main treatment tank, avoiding the problem of concentrated drug solution accumulating at one point and promoting the rapid and uniform diffusion of the drug.

[0021] Through integrated online water quality monitoring sensors, the system obtains real-time feedback on the treatment effect, and the central controller dynamically decides the dosing mode. When the water quality is far from the target value, the system starts the coarse adjustment mode to add sufficient reagents at a high rate to quickly improve the water quality. When the water quality is close to the target threshold, the system automatically switches to the fine adjustment mode. By accurately calculating the trace requirements, the system controls the screw conveyor to feed at an extremely low speed and adjusts the opening of the dosing module in conjunction with the feed. The system adds reagents slowly and accurately at a very small flow rate, achieving fine adjustment. This completely overcomes the over-adjustment or under-adjustment problems that are easily caused by the traditional single dosing mode. Under the premise of ensuring stable compliance, the system achieves the optimization and minimization of reagent dosing.

[0022] From breaking down clumps, premixing, and adjusting the rate of dosing to intelligent dosing based on water quality feedback, the process is coordinated to precisely match the dosage with real-time needs, thus avoiding waste of chemicals. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation of the spiral pusher and the feeding box of the present invention; Figure 3 This is a schematic diagram of the infusion unit structure of the present invention; Figure 4 This is a schematic diagram showing the connection between the spiral pusher and the feeding box of the present invention; Figure 5 This is a schematic diagram of the internal structure of the feeding box of the present invention; Figure 6 This is a cross-sectional view of the loading box of the present invention; Figure 7 This is a schematic diagram of the cylinder connection of the present invention; Figure 8 This is a schematic diagram of the connection between the connecting seat and the extrusion wheel of the present invention; Figure 9 This is a schematic diagram showing the connection between the adjusting seat and the dividing seat of the present invention; Figure 10 This is a flowchart of the water treatment control process of the present invention; Figure 11 This is a flowchart illustrating the control process for the fine-feeding mode and the coarse-feeding mode of the present invention.

[0024] In the diagram: 1. Screw conveyor; 11. Electric motor; 12. Rotary paddle level gauge; 13. Conveying pipe; 2. Feeding box; 21. Connecting seat; 211. Connecting hole; 212. Discharge chute; 213. Feed hole; 22. Adjusting seat; 221. First liquid injection hole; 23. Dividing seat; 231. Sealing block; 232. Beveled groove; 233. Second liquid injection hole; 24. Extrusion wheel; 25. Filter screen; 3. Main liquid delivery pipe; 31. First solenoid valve; 32. Branch liquid delivery pipe; 321. Valve; 33. Second solenoid valve; 34. First connecting pipe; 35. Branch pipe; 36. Third solenoid valve; 37. Second connecting pipe; 4. Level gauge; 5. Hopper; 6. Processing box; 7. Drive motor; 71. Connecting rod; 72. Stirring rod; 8. Cylinder; 81. Connecting plate; 82. Adjusting rod. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides, for example Figures 1-11 The water treatment agent dosing device and method shown include a screw conveyor 1, a dosing tank 2, a main infusion pipe 3, and a level gauge 4; The screw pusher 1 is installed on the processing box 6. The screw pusher 1 is a precision feeding device with variable frequency speed regulation, including a screw shaft driven by a motor 11 and screw blades fixed thereon.

[0027] When the motor 11 is running, it drives the screw shaft to rotate, and then uses the axial thrust generated by the screw blades to push the pharmaceutical material in the screw pusher 1 forward quantitatively and continuously along the trough. A rotary level gauge 12 is installed on one side of the spiral pusher 1. The rotary level gauge 12 is used to monitor the dosage of Chinese medicine in the spiral pusher 1 in real time, realize low material level alarm, and prevent the equipment from running dry. The hopper 5 is installed above the feed inlet of the screw conveyor 1. The hopper 5 is used to store and supply the agent to the screw conveyor 1. The agent in the hopper 5 enters the screw conveyor 1 and is transported to the feeding box 2. The dosing box 2 is installed on the processing box 6. As an independent premixing unit, the dosing box 2 is used to premix the agent before it enters the processing box 6, so as to solve the problems of clogging, dust, agglomeration and uneven mixing that are easy to occur when dry powder agents are directly added. A feeding box 2 is connected to a conveying pipe 13, which is connected to the discharge port of the screw conveyor 1. The conveying pipe 13 is used to transport the material in the screw conveyor 1 to the feeding box 2 for the delivery of the agent. To facilitate the introduction and pretreatment of the reagent, a connecting seat 21 is fixedly connected inside the dosing box 2. A filter screen 25 is installed at the bottom of the connecting seat 21. The dosing box 2 is divided into an upper premixing chamber and a lower dosing chamber. A feeding trough 212 is provided in the connecting seat 21, and a feeding hole 213 is provided through the connecting seat 21. The two ends of the feeding hole 213 are connected to the conveying pipe 13 and the feeding trough 212 respectively. A filter screen 25 is installed at the bottom of the feeding trough 212. The mesh size of the filter screen 25 is set according to the nominal particle size of the drug, and is used to screen and intercept lumps or oversized particles caused by moisture or other reasons. A drive motor 7 is installed on the feeding box 2. A connecting rod 71 is installed at the output end of the drive motor 7. The connecting rod 71 extends downward through the filter screen 25. An extrusion wheel 24 is fixedly installed on the upper part of the connecting rod 71 and the extrusion wheel 24 is in the feeding trough 212. A stirring rod 72 is set below the filter screen 25 on the connecting rod 71. When the raw material in the screw conveyor 1 is conveyed to the feeding box 2, the motor 11 is started to drive the screw shaft and the screw blades fixed on the screw shaft to perform transmission. Under the push of the screw blades, the medicine particles in the screw conveyor 1 are conveyed to the discharge trough 212 through the conveying pipe 13 and the feed hole 213. With the feed trough 212 tilted, the medicine particles roll down onto the filter screen 25. The filter screen 25 filters the medicine particles, and the normal medicine passes through the filter screen 25 and falls down, while blocking the agglomerated or sticky medicine particles. Furthermore, the extrusion roller 24 is set in a conical shape. When the medicine enters the feeding trough 212, the medicine rolls towards the extrusion roller 24 due to the inclined surface of the feeding trough 212. The extrusion roller 24 is also set in a conical shape. The medicine on the extrusion roller 24 rolls down along the extrusion roller 24, so that the medicine is delivered into the gap between the feeding trough 212 and the extrusion roller 24. During the process of the agent entering the dosing tank 2, the liquid to be treated is transported into the dosing tank 2, the agent and the liquid to be treated are pre-mixed, and during the mixing process, the drive motor 7 is started to drive the connecting rod 71 to rotate. Under the rotation of the connecting rod 71, the connecting rod 71 drives the stirring rod 72 to rotate in the dosing tank 2, accelerating the mixing of the agent and the liquid to be treated. Furthermore, with the rotation of the connecting rod 71, the extrusion wheel 24 rotates accordingly. Since the axis of the extrusion wheel 24 is offset relative to the axis of the connecting rod 71, the drug particles blocked on the filter screen 25 are squeezed by the extrusion wheel 24 under the rotation of the extrusion wheel 24. The extrusion wheel 24 squeezes the drug particles between the feeding trough 212 and the extrusion wheel 24, breaking up the agglomerated and / or adhered drug particles, so that the drug particles are broken into appropriate sizes and pass through the filter screen 25 to mix with the liquid to be treated. The mixing effect is improved by the stirring of the stirring rod 72. Before premixing the reagent with the liquid to be treated, the concentration of the premixed liquid is set, and the liquid to be treated is quantitatively delivered according to the reagent being delivered to achieve the required ratio.

[0028] The connecting rod 71 drives the stirring rod 72 to mix the liquid and the agent, and disperses the agent in the pretreatment liquid. This directly avoids the instantaneous precipitation and clumping of the agent due to excessively high local concentration, and ensures that the agent and the pretreatment liquid are fully mixed.

[0029] The specific process of drug delivery and premixing is as follows: the screw conveyor 1 is started, and the drug particles are pushed into the inclined discharge trough 212 through the conveying pipe 13 and the feed hole 213. The drug particles roll down the inclined surface onto the filter screen 25.

[0030] The liquid to be treated from the three branches of the main infusion tube is injected into the premixing chamber of the tank through the inlet hole on the side wall of the infusion tank.

[0031] Normal drug particles pass through the filter screen 25 and fall into the liquid below under the action of gravity and liquid wetting. The agglomerated drug blocked by the filter screen 25 is guided to the gap between the conical extrusion wheel 24 and the side wall of the feed trough 212 during the rolling process.

[0032] When the drive motor 7 starts, the connecting rod 71 simultaneously drives the stirring rod 72 and the extrusion wheel 24 to rotate. The rotation of the stirring rod 72 strongly stirs the liquid and the falling medicine, promoting dissolution and mixing.

[0033] At the same time, the eccentrically rotating extrusion wheel 24 exerts periodic extrusion, shearing and grinding action on the agglomerated agent clamped between it and the side wall of the feed trough 212, breaking it into fine particles that can pass through the filter screen 25, thereby effectively solving the problem of agent agglomeration and blockage, and ensuring that all agents can participate in premixing.

[0034] The feeding box 2 is also provided with an adjusting seat 22 and a dividing seat 23, and the adjusting seat 22 and the dividing seat 23 are located below the connecting rod 71. The dividing seat 23 is fixedly connected in the feeding box 2. The dividing seat 23 is used to divide the feeding box 2. The space of the feeding box 2 above the dividing seat 23 is the premixing space, and the space of the feeding box 2 below the dividing seat 23 is the feeding space. The adjusting seat 22 and the dividing seat 23 cooperate to divide the feeding box 2, thereby dividing the feeding box 2 into a premixing space and a feeding space; The agent passes through the filter screen 25 and enters the premixing space of the dosing box 2. The agent is mixed with the pretreated liquid to form a mixed agent. By mixing the agent first and then adding the mixed agent, it is avoided that the dosing port will be blocked or the agent will stick to the dosing port, which would make it impossible to effectively control the amount of agent added. Furthermore, when the agents are added, they need to be mixed and stirred in the treatment tank 6. If the stirring intensity in the treatment tank 6 is insufficient, the agents will form high-concentration clumps in the main fluid, which will react locally in a short time and cannot spread quickly. In addition, when the agents come into contact with the pre-treatment liquid, they will form gels. When the gels encapsulate the agents, they will prevent the agents from mixing with the main fluid, affecting the treatment effect and requiring the addition of excessive agents.

[0035] By pre-mixing the pretreatment liquid with the reagent, the reagent is mixed in a small space, avoiding the problem of slow dispersion of the reagent when it is all added to the treatment tank 6. The reagent is pre-mixed before being added, and it mixes with the pretreatment liquid in the treatment tank 6 faster than when the reagent is added. Furthermore, the addition of the reagent can be controlled according to the state of the pretreatment liquid in the treatment tank 6 through segmented pretreatment, allowing for more precise control.

[0036] The adjusting seat 22 has first liquid inlet holes 221 at equal intervals, and the dividing seat 23 has a sealing block 231 fixedly connected to the first liquid inlet holes 221. By inserting the sealing block 231 into the first liquid inlet hole 221, and the sealing block 231 is made of flexible material, when the sealing block 231 is inserted into the first liquid inlet hole 221, the sealing block 231 and the first liquid inlet hole 221 are pressed together to seal the first liquid inlet hole 221. Furthermore, the sealing block 231 is provided with a beveled groove 232. When the adjusting seat 22 moves relative to the dividing seat 23, the first liquid inlet hole 221 is separated from the sealing block 231, and a second liquid inlet hole 233 is provided at the center of the dividing seat 23. When the dividing seat 23 is in contact with the adjusting seat 22, the second liquid inlet hole 233 is blocked by the adjusting seat 22. When the first liquid inlet hole 221 is separated from the sealing block 231, the second liquid inlet hole 233 is separated from the adjusting seat 22, so that the agent in the premixing space in the dosing box 2 can be added through the first liquid inlet hole 221 and the second liquid inlet hole 233. When the adjusting seat 22 moves relative to the sealing block 231, since the sealing block 231 inserted into the first liquid inlet hole 221 has a beveled groove 232, as the adjusting seat 22 separates from the sealing block 231, the first liquid inlet hole 221 first separates from the bottom of the beveled edge of the beveled groove 232 on the sealing block 231. The prepared liquid is injected through the gap between the beveled groove 232 and the first liquid inlet hole 221, and the mixed liquid is injected through the second liquid inlet hole 233.

[0037] A cylinder 8 is installed on the feeding box 2. A connecting plate 81 is installed on the output end of the cylinder 8. An adjusting rod 82 is fixedly connected to the bottom end of the connecting plate 81. The adjusting rod 82 is inserted into the feeding box 2 and the connecting seat 21. The adjusting rod 82 passes through the connecting seat 21 and is fixedly connected to the top end of the adjusting seat 22. The adjusting seat 22 is pressed down under the drive of the cylinder 8, so that the sealing block 231 is tightly inserted into the first liquid injection hole 221. The sealing block 231 achieves a seal by flexibly deforming, thereby isolating the premixing space in the injection box 2 from the injection space.

[0038] When it is necessary to add premixed medicine, the cylinder 8 is activated, and the adjusting seat 22 is pulled upward through the connecting plate 81 and the adjusting rod 82. In the initial stage of the upward movement of the adjusting seat 22, the edge of the first injection hole 221 first separates from the bottom end of the inclined groove 232 opened on the sealing block 231, forming a small wedge-shaped gap.

[0039] The premixed solution then flows through this gap into the first injection hole 221, and then through the exposed second injection hole 233 below into the injection space, and finally into the treatment tank 6.

[0040] By precisely controlling the stroke of cylinder 8, the opening of the gap between the first liquid injection hole 221 and the inclined groove 232 can be continuously adjusted, thereby realizing the flow rate adjustment from dripping to full opening, and meeting the precise control requirements of the drug injection acceleration rate under different working conditions.

[0041] When cylinder 8 is started, cylinder 8 pushes connecting plate 81 to move adjusting rod 82. Under the movement of adjusting rod 82, the adjusting rod 82 pulls adjusting seat 22 to move, adjusting the separation of adjusting seat 22 and dividing seat 23 to release mixed liquid, or adjusting adjusting seat 22 and dividing seat 23 to divide the space of adding box 2.

[0042] The connecting seat 21 has a connecting hole 211 corresponding to the adjusting rod 82, and the adjusting rod 82 is inserted into the connecting hole 211.

[0043] A sliding bearing is provided on the connection hole 211 and the feeding box 2 relative to the adjusting rod 82. The sliding bearing is used to provide a hole that matches the adjusting rod 82, and to support and guide the movement of the adjusting rod 82.

[0044] The dosing tank 2 is also provided with a liquid inlet, which is located in the premixing space of the dosing tank 2.

[0045] It also includes an infusion unit, comprising a first branch for directly injecting the liquid to be treated into the treatment tank 6 and a second branch for injecting the liquid to be treated into the premixing chamber; The first branch includes a main infusion pipe 3, in which a first solenoid valve 31 is installed to control the delivery of liquid. One end of the main infusion pipe 3 is connected to a sewage inlet pipe, and the other end of the main infusion pipe 3 is equipped with a second solenoid valve 33. The end of the second solenoid valve 33 away from the main infusion pipe 3 is equipped with a first connecting pipe 34. The first connecting pipe 34 is installed on the dosing tank 2 and works with the main infusion pipe 3 and the first connecting pipe 34 to deliver sewage to the treatment tank 6. A branch infusion pipe 32 is also connected in parallel to the main infusion pipe 3. The two ends of the branch infusion pipe 32 are respectively connected to the two sides of the first solenoid valve 31 installed on the main infusion pipe 3. A valve 321 is provided on the branch infusion pipe 32. When the first solenoid valve 31 fails, temporary liquid can be transported through the branch infusion pipe 32. The valve 321 is used to control the connection and disconnection of the branch infusion pipe 32.

[0046] When the first solenoid valve 31 is operating normally, the valve 321 on the branch infusion pipe 32 is closed, disconnecting the branch infusion pipe 32 from the main infusion pipe 3. When the first solenoid valve 31 malfunctions, the valve 321 on the branch infusion pipe 32 is opened, connecting the branch infusion pipe 32 to the main infusion pipe 3 for temporary sewage transport.

[0047] The second branch includes a branch pipe 35 branching off from the main infusion pipe 3. The branch pipe 35 is connected to the premixing chamber of the dosing tank 2 via a second connecting pipe 37. A third solenoid valve 36 is provided between the branch pipe 35 and the second connecting pipe 37. The third solenoid valve 36 is used to transport sewage. The second connecting pipe 37 is connected to the inlet hole on the dosing tank 2. The liquid transported by the main infusion pipe 3, the branch pipe 35 and the second connecting pipe 37 enters the dosing tank 2 through the inlet hole to premix the agent with the sewage. The premixed liquid is then put into the treatment tank 6 to mix with the sewage in the treatment tank 6. Furthermore, each time the agent and sewage are premixed, the second solenoid valve 33 is closed and the third solenoid valve 36 is opened, and the sewage enters the dosing tank 2 through the main infusion pipe 3, the branch pipe 35 and the second connecting pipe 37, so that the dosing tank 2 is mixed with the agent conveyed in the screw pusher 1. After the reagents are mixed, the liquid in the dosing tank 2 is poured into the treatment tank 6. At this time, the third solenoid valve 36 is closed and the second solenoid valve 33 is opened. The main sewage enters the treatment tank 6 through the main infusion pipe 3 and the first connecting pipe 34. The sewage is then poured into the treatment tank 6, and the premixed liquid in the dosing tank 2 also enters the treatment tank 6. The premixed liquid is mixed with the sewage in equal amounts and then quickly mixed with stirring to avoid adding the reagents in one area, which would result in excessive local concentration and make it impossible to mix the reagents effectively.

[0048] After the liquid in the dosing tank 2 is added, the second solenoid valve 33 is closed and the third solenoid valve 36 is opened. The sewage enters the dosing tank 2 through the main infusion pipe 3, the branch pipe 35 and the second connecting pipe 37, and mixes the dosing tank 2 with the agent conveyed in the spiral pusher 1, and carries out a cyclic dosing process.

[0049] Thus, during system operation, by periodically switching the second solenoid valve 33 and the third solenoid valve 36, two stages of operation are achieved: injecting a fixed amount of water and premixing the agent into the dosing tank 2 and simultaneously adding the premixed liquid and the main sewage to the treatment tank 6. This ensures that the agent is evenly diffused in the main treatment tank 6 and avoids excessively high local concentrations.

[0050] Furthermore, after the sewage is transported, the sewage monitoring results in the treatment tank 6 are used to determine whether the sewage treatment is complete. If adjustment is required, the agent and liquid are mixed in the dosing tank 2 to regulate the sewage in the treatment tank 6, thereby achieving precise regulation of the sewage in the treatment tank 6. This, combined with the initial coarse adjustment to ensure the mixing effect of the agent and liquid, and the subsequent fine adjustment, enables precise control of sewage treatment and improves the sewage treatment effect.

[0051] It also includes a level gauge 4, which is installed on the treatment tank 6. The level gauge 4 is used to monitor the wastewater liquid in the treatment tank 6, and its signal can participate in the interlocking control of the whole system.

[0052] The treatment tank is equipped with a liquid outlet, and a water quality monitoring sensor is installed at the liquid outlet to monitor the water quality and obtain water quality data. A method of using a water treatment chemical dosing device includes the following steps: S1: Start the screw conveyor 1 to push the quantitative amount of medicine through the conveying pipe 13 to the feeding trough 212 at the top of the feeding box 2; S2: The liquid to be treated is injected into the premixing chamber of the dosing tank 2 through the first branch, and the drive motor 7 is started at the same time; S3: The agent rolls down the feed trough 212 to the filter screen 25. Normal particles pass through the filter screen 25 and fall into the liquid in the premixing chamber. The agglomerated particles are blocked by the filter screen 25. The drive motor 7 drives the stirring rod 72 to stir to promote mixing. At the same time, it drives the eccentric extrusion wheel 24 to rotate, which crushes the agglomerated particles stuck on the filter screen 25 and allows them to pass through the filter screen 25. S4: After premixing is completed, the stroke of the control cylinder 8 is used to open the drain channel, and at the same time the liquid to be treated is injected into the treatment tank 6 through the second branch. The premixed liquid is discharged into the dosing chamber at a controllable rate and finally enters the treatment tank 6 to be mixed synchronously with the mainstream liquid. S5: Based on the water quality data obtained by the monitoring unit, determine whether supplementary addition is needed. If so, repeat the above steps to perform coarse and fine adjustment additions until the water quality meets the standards. In step S4, by precisely controlling the stroke of cylinder 8, the opening of the gap between the first liquid inlet 221 and the inclined groove 232 can be continuously adjusted, thereby realizing the flow rate adjustment from dripping to full opening. When performing coarse adjustment, a larger opening is used for rapid addition, and when performing fine adjustment, a smaller opening is used for slow and precise addition.

[0053] The specific operation is as follows: when adding the agent, at the beginning, the liquid level, material level and water quality data are obtained by the liquid level gauge 4, the rotary paddle level gauge 12 and the water quality monitoring sensor respectively. The water quality data is compared with the target value. The liquid level data, material level data, water quality data and target value comparison data are input into the central processing unit through the input module, and the corresponding fine dosing control logic and coarse dosing control logic are executed. When starting water treatment, the dosage of the reagent is controlled by controlling the speed of the screw conveyor 1, the amount of mixed liquid is controlled by the third solenoid valve 36, and the drive motor 7 is started to mix the reagent and liquid for the initial coarse mixing. After the wastewater is mixed, water quality is monitored to determine whether to switch from coarse to fine regulation, thereby improving the precision control of water quality treatment. By monitoring water quality, the water quality sensor determines whether the water quality meets the standards. When the wastewater is discharged and the water quality meets the standards, the chemical dosing is stopped. If the water quality does not meet the standards, the water quality is judged to see if the water quality data has reached the fine-tuning threshold that needs to be adjusted. This threshold is set according to the treatment effect in the actual adjustment process. When the water quality has not reached the fine adjustment threshold, the coarse dosing mode is activated. The mixture is prepared according to the preset dosage and liquid volume. The dosage is controlled by controlling the speed of the screw conveyor 1, and the liquid volume is controlled by the third solenoid valve 36. The drive motor 7 is started to mix the agent and liquid. The cylinder 8 is opened to separate the regulating seat 22 and the dividing seat 23 to add the mixed liquid agent. The water quality is then monitored again to determine whether the water quality meets the standards and whether the fine adjustment threshold has been reached. The dosing continues until the liquid is completely treated and the dosing is finished. When fine-tuning the threshold for water quality assessment, the dosage is calculated based on the water treatment conditions and the total amount of water. The dosage is controlled by adjusting the speed of the spiral pusher 1 and mixing the agent with the liquid. After mixing, the cylinder 8 is opened and its opening degree is adjusted to regulate the separation between the adjusting seat 22 and the dividing seat 23, thereby controlling the dosing speed and slowly adjusting the water quality. The water quality is monitored in real time until the water quality meets the standards, at which point the dosing ends.

[0054] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water treatment agent dosing device, characterized in that, include: The spiral pusher (1) has a hopper (5) installed above its feed inlet; The feeding box (2) is connected to a conveying pipe (13), and the conveying pipe (13) is connected to the discharge port of the screw pusher (1). A connecting seat (21) is fixedly connected inside the feeding box (2). A filter screen (25) is provided at the bottom of the connecting seat (21). The feeding box (2) is divided into an upper premixing chamber and a lower feeding chamber. A level gauge (4) is installed on the processing tank (6); A drive motor (7) is installed on the feeding box (2), and its output end is connected to a connecting rod (71) that passes through the filter screen (25). The connecting rod (71) has an eccentrically set conical extrusion wheel (24) fixed above the filter screen (25), and a stirring rod (72) fixed below the filter screen (25). The infusion unit includes a first branch for directly injecting the liquid to be treated into the treatment tank (6) and a second branch for injecting the liquid to be treated into the premixing chamber.

2. The water treatment agent dosing device according to claim 1, characterized in that, The connecting seat (21) has a feeding groove (212) and a feeding hole (213) is provided through the connecting seat (21). The two ends of the feeding hole (213) are respectively connected to the conveying pipe (13) and the feeding groove (212).

3. The water treatment agent dosing device according to claim 1, characterized in that, The dosing box (2) is also provided with a dividing seat (23). The dividing seat (23) is used to divide the dosing box (2) into a premixing chamber and a dosing chamber. The space above the dividing seat (23) is the premixing space, and the space below the dividing seat (23) is the dosing space. An adjusting seat (22) that can move up and down relative to the dividing seat (23) is provided above the dividing seat (23). The adjusting seat (22) is provided with first liquid inlet holes (221) at equal intervals. A sealing block (231) is fixedly connected to the dividing seat (23) corresponding to the first liquid inlet hole (221). A beveled groove (232) is provided on the sealing block (231). A second liquid inlet hole (233) is provided on the dividing seat (23). The second liquid inlet hole (233) is used to cooperate with the first liquid inlet hole (221) to add liquid.

4. The water treatment agent dosing device according to claim 1, characterized in that, A cylinder (8) is installed on the feeding box (2). A connecting plate (81) is installed at the output end of the cylinder (8). An adjusting rod (82) is fixedly connected to the bottom end of the connecting plate (81). The adjusting rod (82) is inserted into the feeding box (2) and the connecting seat (21). The adjusting rod (82) passes through the connecting seat (21) and is fixedly connected to the top end of the adjusting seat (22).

5. The water treatment agent dosing device according to claim 1, characterized in that, The first branch includes a main infusion pipe (3), in which a first solenoid valve (31) is installed. One end of the main infusion pipe (3) is used to connect to the sewage inlet pipe, and the other end of the main infusion pipe (3) is equipped with a second solenoid valve (33). The end of the second solenoid valve (33) away from the main infusion pipe (3) is equipped with a first connecting pipe (34). The first connecting pipe (34) is installed on the dosing box (2) and works with the main infusion pipe (3) and the first connecting pipe (34) to transport sewage to the treatment box (6).

6. The water treatment agent dosing device according to claim 5, characterized in that, The main infusion tube (3) is also connected in parallel with a branch infusion tube (32). The two ends of the branch infusion tube (32) are respectively connected to the two sides of the first solenoid valve (31) provided on the main infusion tube (3), and a valve (321) is provided on the branch infusion tube (32).

7. The water treatment agent dosing device according to claim 1, characterized in that, The second branch includes a branch pipe (35) branched off from the main infusion pipe (3). The branch pipe (35) is connected to the premixing chamber of the dosing box (2) through a second connecting pipe (37). A third solenoid valve (36) is provided between the branch pipe (35) and the second connecting pipe (37).

8. The water treatment agent dosing device according to claim 1, characterized in that, A cylinder (8) is installed on the feeding box (2). A connecting plate (81) is installed at the output end of the cylinder (8). An adjusting rod (82) is fixedly connected to the bottom end of the connecting plate (81). The adjusting rod (82) is inserted into the feeding box (2) and the connecting seat (21). The adjusting rod (82) passes through the connecting seat (21) and is fixedly connected to the top end of the adjusting seat (22).

9. A water treatment agent dosing device according to claim 1, characterized in that, It also includes a central controller, which is connected to the motor (11), drive motor (7), cylinder (8), solenoid valve in the infusion unit and water quality monitoring sensor on the spiral pusher (1) to receive monitoring data and execute predetermined coarse and fine dosing control logic.

10. A method of using a water treatment agent dosing device, wherein the water treatment agent dosing device according to any one of claims 1-9 is characterized in that, Includes the following steps: S1: Start the spiral pusher (1) and push the quantitative agent through the conveying pipe (13) to the feeding trough (212) at the top of the feeding box (2). S2: The liquid to be treated is injected into the premixing chamber of the dosing box (2) through the first branch, and the drive motor (7) is started at the same time. S3: The agent rolls down the feed trough (212) to the filter screen (25). Normal particles pass through the filter screen (25) and fall into the liquid in the premixing chamber. The agglomerated particles are blocked by the filter screen (25). The drive motor (7) drives the stirring rod (72) to stir to promote mixing. At the same time, it drives the eccentric extrusion wheel (24) to rotate, crushing the agglomerated particles stuck on the filter screen (25) so that they can pass through the filter screen (25). S4: After premixing is completed, the stroke of the control cylinder (8) opens the drain channel, and at the same time, the liquid to be treated is injected into the treatment tank (6) through the second branch. The premixed liquid is discharged into the dosing chamber at a controllable rate and finally enters the treatment tank (6) to be mixed synchronously with the mainstream liquid. S5: Based on the water quality data obtained by the monitoring unit, determine whether supplementary addition is needed. If so, repeat the above steps to perform coarse and fine adjustment additions until the water quality meets the standards. In step S4, by precisely controlling the stroke of the cylinder (8), the opening of the gap between the first liquid injection hole (221) and the inclined groove (232) can be continuously adjusted, thereby realizing the flow rate adjustment from dripping to full opening. When performing coarse adjustment, a larger opening is used for rapid addition, and when performing fine adjustment, a smaller opening is used for slow and precise addition.

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