A wastewater treatment process and dosing device

Abstract

This invention relates to the field of wastewater treatment technology. The aim is to provide a wastewater treatment process comprising the following steps: S1, bag breaking and transfer: Bagged dry wastewater treatment agents are automatically transferred to a negative pressure bag breaking platform at the dosing station. A φ15-φ30mm sealed bag breaking opening is formed on the surface of the packaging bag using a rotary drill. During the bag breaking process, the bag breaking opening is kept sealed to the material extraction head. Then, negative pressure is used to extract the dry agent from the packaging bag, achieving separation of the agent from the packaging bag. During negative pressure suction, the dust concentration near the workstation is ensured to be ≤0.5mg / m³; S2, precise dissolution and preparation; S3, multi-stage filtration and temporary storage; S4, intelligent quantitative dosing; S5, residual material cleaning. This invention and wastewater treatment method, through automated loading, transfer, bag breaking, suction, and bag cleaning, achieves efficient agent delivery with zero manual contact, greatly reducing dust pollution during water treatment dosing and significantly improving operational efficiency and material utilization.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a wastewater treatment dosing device. Background Technology

[0002] In wastewater treatment processes, the environmental friendliness, material utilization rate, and ease of operation of chemical dosing are core factors affecting the stable operation and overall cost control of wastewater treatment systems. Currently, the mainstream dosing mode in wastewater treatment plants still relies on a segmented process of "centralized bag breaking - intermediate storage - transfer and dosing": in an independent area, bagged chemicals are opened manually or mechanically to transfer the loose chemicals into intermediate containers, which are then transported by transfer equipment to the vicinity of the dosing equipment in each process, and finally, the dosing is completed by manual dumping or simple conveying.

[0003] However, this traditional operating model has an inherent contradiction that is difficult to resolve, with two key flaws being particularly prominent. First, the conflict between dust pollution and the method of breaking open the bags remains unresolved. To quickly remove the chemicals from the bags, existing technologies often employ large-scale tearing methods. However, this causes a large amount of chemical dust to spread instantly. During subsequent transfer, transport, and unloading, the loose chemicals continue to generate dust, severely polluting the workshop environment, corroding equipment, and harming the respiratory system of operators, failing to meet environmental protection and occupational health requirements. Conversely, reducing the tearing area to minimize dust makes it difficult to remove the chemicals, further exacerbating the material residue problem. Second, the high material residue rate leads to significant resource waste. Whether manually or mechanically breaking open the bags, the inner walls of the bagged chemicals absorb a large amount of loose chemicals. These residual chemicals are difficult to thoroughly clean through conventional pouring or simple suction. Long-term accumulation not only causes significant material waste but may also affect the accuracy of subsequent dosing due to the mixing of residual chemicals from different batches, thus reducing the wastewater treatment effect.

[0004] While existing technologies have attempted to use negative pressure suction to assist in material handling and reduce dust, single negative pressure suction is difficult to adapt to changes in the shape of packaging bags. When the amount of medicine inside the bag decreases, the bag is prone to collapse and sticking together, leading to blockage of the suction channel and making it impossible to ensure the complete handling of the material inside the bag. This still fails to solve the core pain points of "dust pollution" and "high residue rate," nor does it balance the contradiction between "bag breaking area" and "material integrity." Therefore, there is an urgent need for a dosing technology solution that can achieve low-dust bag breaking next to the dosing equipment in the process, while efficiently reducing material residue and balancing the contradiction between bag breaking and material handling, so as to adapt to the actual production needs of wastewater treatment plants and achieve environmentally friendly, efficient, and low-consumption dosing of chemicals. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater treatment process that is highly automated, reduces pollution, and minimizes material residue.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] A wastewater treatment process includes the following steps:

[0008] S1. Bag Breaking and Transfer: The bagged dry wastewater treatment agent is automatically transferred to the negative pressure bag breaking platform at the dosing station. A φ15-φ30mm sealed bag breaking opening is formed on the surface of the packaging bag through a rotary drill. During the bag breaking process, the bag breaking opening is kept in a sealed fit with the material extraction head. Then, the dry agent inside the bag is extracted from the packaging bag by negative pressure, realizing the separation of the agent from the packaging bag. During negative pressure suction, the dust concentration near the work station is ensured to be ≤0.5mg / m³.

[0009] S2. Precise Dissolution and Preparation: The dry agent, drawn by negative pressure, is delivered to the corresponding closed dissolution tank of each tool dosing equipment. The mass ratio of dry agent to clean water is controlled according to the wastewater treatment agent ratio requirements. Room temperature clean water is injected into the dissolution tank through a metered water pump. The stirring mechanism is started and stirred at a speed of 120-300r / min for 10-30min. At the same time, the temperature in the dissolution tank is monitored in real time by a temperature sensor. When the liquid temperature is <20℃, the heating module is started to raise the liquid temperature to 20-35℃ to ensure that the agent is fully dissolved to form a homogeneous drug solution.

[0010] S3. Multi-stage filtration and temporary storage: The homogeneous drug solution in the dissolving tank is first filtered through a 100-mesh coarse filter to remove large particulate impurities, and then through a 300-mesh fine filter to remove undissolved fine particulate drugs. The suspended solids content of the drug solution after filtration is ≤5mg / L. The filtered drug solution is then transported to a temporary storage tank. The liquid temperature in the temporary storage tank is maintained at 20-35℃ by a constant temperature module, and the liquid level is controlled at 30%-80% of the total volume of the tank. When it is below 30%, the dissolving tank is automatically replenished, and when it is above 80%, the discharging from the dissolving tank is stopped.

[0011] S4. Intelligent quantitative dosing: Based on the real-time water quality parameters and treatment load of the wastewater treatment system, the homogeneous chemical solution in the temporary storage tank is delivered to the corresponding process processing unit of the dosing equipment through a variable frequency metering pump. At the same time, the dosing flow rate is monitored in real time by an online flow sensor, and the chemical solution dosing point is kept mixed with the turbulent water.

[0012] S5. Residual Material Cleaning: After the bagged medicine is extracted, the empty bags are automatically cleaned from the bag breaking station of the negative pressure bag breaking platform, and the residual rate of empty bag medicine is ≤1%.

[0013] In addition, the present invention also discloses a wastewater treatment dosing device adapted to the method, including an unmanned vehicle controlled by a control center and capable of automatically traveling between the dosing station and the reagent warehouse of the process dosing equipment; the reagent warehouse is equipped with a warehouse loading and unloading machine controlled by the control center and capable of loading bagged reagents onto the unmanned vehicle; a negative pressure bag breaking platform and a station loading and unloading machine controlled by the control center are set up next to the process dosing equipment; the station loading and unloading machine can unload the bagged reagents loaded on the unmanned vehicle to the dosing station next to the process dosing equipment, transport the bagged reagents at the dosing station to the negative pressure bag breaking platform, and transport the reagents to the process dosing equipment through the negative pressure bag breaking platform;

[0014] The negative pressure bag-breaking platform, along the processing sequence of bagged medicines, includes a bag-breaking processing table, a conveying pipeline, and a negative pressure feeder.

[0015] The bag-opening processing station includes a bag-opening carrier plate for carrying bagged medicines, and a material-receiving head with a suction pipe installed at the bag-opening carrier plate; the suction pipe of the material-receiving head can be inserted into or removed from the packaging bag on the bag-opening carrier plate; the tail end of the material-receiving head is connected to a negative pressure material feeder through a conveying pipe.

[0016] The negative pressure feeder is used to generate negative pressure inside so that the suction pipe of the bag opening processing table can form a suction of the medicine inside the packaging bag; and the negative pressure feeder is provided with an outlet for feeding medicine to the feed port of the process drug dosing equipment.

[0017] Preferably, the material receiving head includes a square tank, one side of which is provided with a discharge port, which is connected to a conveying pipe through a telescopic corrugated pipe; the suction pipe is located at the top of the square tank and is connected to the inside of the square tank.

[0018] A drill rod is provided at the center of the suction pipe, and the head end of the drill rod extends outside the suction pipe; a spiral blade extending along the length of the drill rod is provided on the circumference of the drill rod; a bag-opening motor is provided at the bottom of the square can, and the drill rod is connected to the bag-opening motor; the square can is mounted on a first mounting plate, and a drive cylinder is provided on one side of the first mounting plate for driving the first mounting plate to move so that the drill rod is inserted into the packaging to form a bag-opening operation.

[0019] Preferably, a compression sleeve is provided at the end of the suction pipe, and an annular pressure plate is provided at one end of the compression sleeve facing the packaging bag, and the other end is inserted into the suction pipe to form a sliding fit with the suction pipe; a compression spring is provided on the outer sleeve of the compression sleeve; the two ends of the compression spring are respectively fixed to the end face of the suction pipe and the shoulder on the periphery of the compression sleeve.

[0020] Preferably, the bottom surface of the square tank is also provided with a one-way air supply port that runs from the outside to the inside, and the air supply port is provided with an electrically controlled valve that can adjust the opening degree.

[0021] Preferably, the bag-removing carrier plate is arranged at an angle of 5-10° on the negative pressure bag-breaking platform via the first bracket. The bag-removing carrier plate includes two plates arranged on both sides of the suction pipe, and a rotating roller is provided on the top surface of the plate. A first lifting baffle driven by a lifting cylinder is provided on the negative pressure bag-breaking platform near the lower end of the bag-removing carrier plate.

[0022] An arc-shaped portion is provided at one end of each of the two plates facing each other. An arc-shaped positioning block is provided on the first support to cooperate with the arc-shaped portion. The arc-shaped portion and the arc-shaped positioning block form a rotational fit. A rubber pad is provided between the upper parts of the arc-shaped portion. The suction pipe of the material taking head extends through the perforation on the rubber pad to the top of the rubber pad.

[0023] Side plates are provided on both sides of the two plates, and plate shafts are provided on the side plates that coincide with the arc center of the arc part; the plate shafts of the two plates are connected to the rocker drive mechanism and can switch between V-shaped state and straight plate state under the drive of the rocker drive mechanism.

[0024] The rocker drive mechanism includes a drive wheel driven by a rocker motor, which is mounted on a plate shaft on a plate body. The drive wheel is connected to a transition wheel via a synchronous belt. The transition wheel and the driven wheel are meshed.

[0025] Preferably, the negative pressure bag breaking platform is further provided with a pressing mechanism, which includes a pressing plate disposed above the bag breaking carrier plate and capable of moving in the up and down direction under the drive of the lead screw and nut pair. The pressing plate is provided with an air nozzle that can be inserted into the packaging bag; the air nozzle is connected to the air pump circuit.

[0026] Preferably, the negative pressure feeder includes a negative pressure chamber, a negative pressure fan communicating with the inside of the negative pressure chamber is provided at the top of the negative pressure chamber, and a pressure sensor is provided inside the negative pressure chamber;

[0027] The lower part of the negative pressure chamber is provided with a downwardly angled discharge channel and a vertical connecting pipe to form an inverted V-shaped structure; the connecting pipe is connected to the vertical section at the end of the conveying pipe.

[0028] The discharge port is located at the end of the discharge channel. A cylindrical part is provided near the discharge port in the discharge channel. A discharge shaft driven by a discharge motor is provided inside the cylindrical part. Several valve plates that cooperate with the cylindrical part are provided on the circumference of the discharge shaft.

[0029] Preferably, the negative pressure feeder has lifting and rotating functions. The connecting pipe is inserted into the vertical section of the conveying pipe and forms a sliding fit with the conveying pipe, which is circumferentially limited and moves in the vertical direction. The lower part of the vertical section of the conveying pipe is provided with a rotary joint, and the upper part is provided with a geared disc driven by a rotary drive motor. A lifting cylinder is provided on the side wall of the connecting pipe facing away from the discharge channel. The output end of the lifting cylinder faces downward and is opposite to the baffle bar fixedly provided on the vertical section of the conveying pipe.

[0030] Preferably, the negative pressure bag breaking platform is further provided with a bag removal mechanism for removing empty packaging bags on the bag breaking processing table; the bag removal mechanism includes a rotating column driven by a bag removal motor and installed on the negative pressure bag breaking platform, and a swing bar plate that matches the inclination angle of the bag breaking carrier plate is fixedly installed on the circumference of the rotating column, and the empty packaging bags fall off the bag breaking carrier plate by swinging the swing bar plate.

[0031] Preferably, a temporary storage plate is provided on the negative pressure bag-breaking platform on one side of the bag-breaking carrier plate. The temporary storage plate is inclined and one end is close to the bag-breaking carrier plate. A rotating roller is also provided on the top of the temporary storage plate. A second lifting baffle driven by a lifting cylinder is provided between the temporary storage plate and the bag-breaking carrier plate.

[0032] The beneficial effects of this invention are mainly reflected in the following: This wastewater treatment method and dosing device, through an automated loading, transfer, bag breaking, suction, and bag cleaning process, achieves efficient delivery of chemicals with zero manual contact, significantly improving operational efficiency and material utilization. Specifically, it includes the following advantages:

[0033] 1. The entire process of drug transfer and loading is automated. The unmanned vehicle automatically travels between the silo and the drug dosing equipment. The machine directly places the bagged drugs on the bag removal carrier or temporary storage carrier. With the help of the lifting baffle, the packaging bag is precisely controlled to slide to the working position. No manual handling and positioning are required, which significantly reduces labor costs and labor intensity.

[0034] 2. The material feeding head adopts a drill rod rotating bag breaking design. During the bag breaking process, the material feeding head can be tightly inserted into or attached to the bag body. Combined with the sealing effect of negative pressure suction, it can effectively prevent the leakage of chemicals and dust, ensuring a clean working environment and the health of operators.

[0035] 3. The bag-removing carrier plate can be flexibly switched between a straight plate and a V-shaped state. In the initial stage of suction, the straight plate state stably supports the packaging bag, which facilitates precise operation of the material removal head. When there is residual medicine in the bag, it switches to a V-shaped state, using gravity to guide the residual medicine to the center and, together with negative pressure suction, achieves deep extraction, which greatly reduces the residual medicine rate.

[0036] 4. When the bag carrier plate is in the V-shape after being removed, an air nozzle can be used to inflate the bag. This supports the packaging bag and keeps it in an expanded shape, preventing the bag from collapsing and wrinkling, which would create dead corners for drug retention. This further improves the collection and suction effect of residual drugs, increases material utilization, and reduces resource waste.

[0037] 5. The negative pressure conveying path (square tank - conveying pipeline - connecting pipeline - discharge channel) is smooth and sealed. Combined with the pressure regulation function of the negative pressure feeder, it can adapt to the conveying of agents with different particle sizes and specific gravities, avoid pipeline blockage or conveying failure, and ensure the stability and continuity of the dosing operation.

[0038] 6. After suction is completed, the bag removal plate returns to a straight plate state. The bag removal mechanism can quickly push the empty packaging bags down for cleaning through the swing plate without manual intervention, which further improves the automation level of the device and realizes the closed loop of the operation process. Attached Figure Description

[0039] Figure 1 This is a structural block diagram of the present invention;

[0040] Figure 2 This is a schematic diagram of the negative pressure bag breaking platform;

[0041] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0042] Figure 4 for Figure 3 Enlarged view of section B;

[0043] Figure 5 This is a top-down view of the structure when the bag is removed.

[0044] Figure 6 This is a schematic diagram of the loading and unloading machinery at the station in a preferred embodiment;

[0045] Figure 7 for Figure 6 Left view of the gripper platform.

[0046] Figure label:

[0047] 1. Unmanned vehicle; 2. Warehouse loading and unloading machinery; 3. Negative pressure bag breaking platform; 4. Bag breaking processing table; 5. Conveying pipeline; 6. Negative pressure feeder; 7. Bag breaking carrier plate; 8. Suction pipeline; 9. Feeding head; 10. Discharge port; 11. Square tank; 12. Discharge pipe outlet; 13. Telescopic corrugated pipe; 14. Drill rod; 15. Spiral blade; 16. Bag breaking motor; 17. First mounting plate; 18. Drive cylinder; 19. Pressing sleeve; 20. Pressure plate; 21. Compression spring; 22. Air supply pipe outlet; 23. Electrically controlled valve; 24. First bracket; 25. Plate body; 26. Rotating roller; 27. First lifting baffle; 28. Arc-shaped part; 29. ​​Arc-shaped positioning block; 30. Rubber pad; 31. Side plate; 32. Plate shaft; 33. Warping 34. Drive wheel; 35. Transition wheel; 36. Synchronous belt; 37. Driven wheel; 38. Pressing mechanism; 39. Screw and nut pair; 40. Pressing plate; 41. Air nozzle; 42. Negative pressure chamber; 43. Negative pressure fan; 44. Pressure sensor; 45. Discharge channel; 46. Connecting pipe; 47. Cylindrical section; 48. Discharge motor; 49. Discharge shaft; 50. Valve plate; 51. Rotary joint; 52. Rotary drive motor; 53. Gear plate; 54. Lifting cylinder; 55. Stop bar; 56. Bag removal mechanism; 57. Bag removal motor; 58. Rotating column; 59. Swinging bar; 60. Temporary storage plate; 61. Second lifting baffle; 62. Transverse guide rail; 63. Gripper platform; 64. Shaft clamp; 65. Gripper. Detailed Implementation

[0048] This embodiment details the specific operation flow, equipment coordination, and process details of the above-mentioned wastewater treatment process. This method relies on a wastewater treatment dosing device and process dosing equipment. The device includes an unmanned vehicle 1, warehouse / site loading and unloading machinery, and a negative pressure bag-breaking platform 3. A dosing station near the process dosing equipment is used to temporarily store the transported bagged chemicals. The process dosing equipment includes a closed dissolving tank, multi-stage filtration components, a temporary storage tank, and a variable frequency metering pump, etc., to achieve chemical dissolution and dosing. All equipment is connected to the control center (dispatch center) to achieve fully automated, interconnected control. The specific implementation of each process is described below:

[0049] S1. Transfer and bag-breaking process

[0050] The control center sends pre-operation instructions to the unmanned vehicle 1, the warehouse loading and unloading machinery 2, and the station loading and unloading machinery. The warehouse loading and unloading machinery 2 accurately grabs the bagged dry wastewater treatment agents from the agent warehouse and loads them onto the unmanned vehicle 1. The unmanned vehicle 1 automatically travels along the preset navigation path to each wastewater treatment dosing station, realizing the temporary storage of the agents at the dosing stations. This completes the automated transfer of bagged agents.

[0051] The loading and unloading machinery at the site receives instructions from the control center and loads the bagged medicines from the dosing station onto the unloading carrier plate 7 of the negative pressure bag-breaking platform 3 (when there is no temporary medicine stored at the dosing station, the bagged medicines on the unmanned vehicle 1 can also be directly transferred to the unloading carrier plate 7, and the bagged medicines are accurately positioned by the first lifting baffle 27 to achieve rapid material picking and transfer); then the control center drives the drive cylinder 18 at the picking head 9 to move the picking head 9 towards the packaging bag. The pressure plate 20 at the end of the picking head 9 first comes into contact with the surface of the packaging bag, and the bag-breaking motor 16 drives the drill rod 14 in the suction pipe to rotate at high speed, forming a sealed bag-breaking opening of φ15-φ30mm on the surface of the packaging bag. Under the elastic force of the compression spring 21, the pressure plate 20 always keeps in a sealed fit with the packaging bag around the bag-breaking opening, avoiding dust leakage during the suction process.

[0052] The negative pressure feeder 6 is activated, creating a stable negative pressure in the suction pipe 8. This negative pressure draws the dry medicine out of the packaging bag along the suction pipe 8, achieving separation of the medicine from the packaging bag. During the suction process, the dust concentration sensor at the negative pressure bag breaking platform 3 monitors the dust concentration near the workstation in real time. The control center adjusts the negative pressure value and the sealing fit to ensure that the dust concentration near the workstation is ≤0.5mg / m³. The extracted dry medicine is transported to the closed dissolving tank of the corresponding process dosing equipment through the sealed receiving hopper and sealed conveying pipe.

[0053] S2, Precise Dissolving and Blending Process

[0054] After the dry reagent is delivered to the closed dissolving tank, the control center calculates the mass ratio of the dry reagent to the clean water according to the reagent ratio requirements of the wastewater treatment process, and sends start / stop and flow instructions to the metered water pump. The metered water pump injects room temperature clean water into the closed dissolving tank, and the amount of clean water added is precisely matched with the amount of dry reagent added.

[0055] After the water is added, the control center starts the stirring mechanism in the dissolving tank. The stirring motor drives the stirring shaft to rotate at a speed of 120-300 r / min. The spiral stirring blades and radial scraping blades on the stirring shaft rotate synchronously. The spiral stirring blades achieve thorough mixing of the dry reagent and water, while the radial scraping blades rotate in contact with the inner wall of the dissolving tank to prevent reagent residue from adhering to the wall. The stirring and mixing time is generally controlled to be 10-30 minutes. During the stirring process, the temperature sensor in the dissolving tank collects the liquid temperature data in the tank in real time and feeds it back to the control center.

[0056] When the temperature sensor detects that the liquid temperature is <20℃, the control center automatically starts the heating module on the outer wall of the dissolving tank. The heating module heats the mixture in the dissolving tank by electric heating until the liquid temperature reaches 20-35℃ and then stops heating. During the heating process, the stirring mechanism runs continuously to ensure that the dry agent is fully dissolved at the appropriate temperature and finally forms a homogeneous drug solution. The dissolving tank is kept sealed throughout the dissolving process to prevent drug volatilization and dust spillage.

[0057] S3, Multi-stage filtration and temporary storage process

[0058] After the homogeneous drug solution in the dissolving tank is prepared, the control center opens the solenoid valve at the discharge end of the dissolving tank. Under the combined action of gravity and the delivery pump, the drug solution first flows through a 100-mesh coarse filter assembly. The coarse filter assembly is a cylindrical precision stainless steel filter screen that quickly removes large particulate impurities, drug clumps, and other foreign matter from the drug solution. The drug solution after coarse filtration continues to flow through a 300-mesh fine filter assembly. The fine filter assembly performs fine filtration of the drug solution, thoroughly removing undissolved fine particulate drugs and ensuring that the suspended solids content of the filtered drug solution is ≤5mg / L.

[0059] After multi-stage filtration, the homogeneous drug solution is transported to the corresponding temporary storage tank. The temporary storage tank is equipped with a temperature control module and a liquid level sensor. The temperature control module adopts a sandwich-type water bath insulation structure to maintain the liquid temperature of the drug solution in the tank at 20-35℃ in real time, preventing the drug solution from stratifying and settling due to temperature changes. The liquid level sensor monitors the liquid level in the temporary storage tank in real time. When the liquid level is lower than 30% of the total volume of the tank, the liquid level sensor sends a replenishment signal to the control center. The control center automatically triggers the dispensing action of the dissolving tank to replenish the temporary storage tank. When the liquid level is higher than 80% of the total volume of the tank, the control center sends a stop signal to close the dispensing solenoid valve of the dissolving tank and stop feeding the temporary storage tank, realizing automated temporary storage of the drug solution and liquid level linkage control.

[0060] S4, Intelligent Quantitative Dosing Process

[0061] The online water quality monitoring instrument of the wastewater treatment system collects water quality parameters such as influent flow rate, COD, ammonia nitrogen, and total phosphorus in real time, and transmits the data to the control center in real time. The control center has a built-in wastewater treatment agent dosing algorithm, which automatically calculates and determines the precise dosage of the chemical solution based on the real-time water quality parameters and the wastewater treatment load of the current process.

[0062] The control center sends frequency conversion commands to the variable frequency metering pump. The variable frequency metering pump adjusts its operating frequency according to the commands and accurately delivers the homogeneous chemical solution in the temporary storage tank to the corresponding process processing unit of the chemical dosing equipment (such as the dosing equipment in the reaction tank, aeration tank, or flocculation tank) according to the calculated dosage. During the chemical solution delivery process, the online flow sensor on the dosing pipeline monitors the dosing flow rate in real time and feeds the flow data back to the control center to form a dosage control. If the flow rate deviates, the control center automatically adjusts the frequency of the variable frequency metering pump to ensure that the dosage is accurate.

[0063] The dosing point of the chemical solution is set in the turbulent water zone of the process treatment unit, so that the added chemical solution can be directly and fully mixed with the turbulent sewage, improving the mixing efficiency of the chemical solution and sewage, avoiding local accumulation of chemical solution, and ensuring the effectiveness of the agent.

[0064] S5. Cleaning process

[0065] After the bagged medicine on the negative pressure bag breaking platform 3 is sucked up by negative pressure, the control center sends an operation command to the bag removal mechanism 56 of the negative pressure bag breaking platform 3. The bag removal motor 57 drives the rotating column 58 to rotate. The swing plate 59 on the rotating column 58 swings synchronously with the rotating column 58, pushing the empty packaging bags on the bag removal carrier plate 7 to the lower end of the platform, realizing the automatic cleaning of empty bags from the bag breaking station. The cleaned empty bags can be collected and processed uniformly. After testing, the medicine residue rate of the empty bags is ≤1%.

[0066] During breaks in chemical dosing operations or after a single dosing cycle, the residual material cleaning operation of the pipelines and tanks can be initiated (the control center can preset timed cleaning or manually trigger cleaning). Open the solenoid valve for flushing the pipelines with clean water, and the clean water flows sequentially through the dissolving tank, multi-stage filter components, temporary storage tank, and dosing pipeline, rinsing the inner walls of each tank and pipeline in sections. During the rinsing process, the residual chemical solution adhering to the inner wall flows with the clean water and eventually flows back to the dissolving tank through the return pipeline, realizing the recovery and reuse of residual agents, reducing agent waste, and preventing residual agents from clumping and clogging in the tanks and pipelines, ensuring the stability of subsequent equipment operation.

[0067] This method, through the coordinated operation of the above-mentioned processes, achieves fully automated, sealed, and refined processing of bagged wastewater treatment dry agents, from bag breaking and dissolution to filtration and temporary storage, quantitative dosing and residual material cleaning. It effectively solves problems such as dust pollution, high agent residue rate, low dosing accuracy, and high labor costs in traditional dosing processes, significantly improves the comprehensive utilization rate of agents and the efficiency of wastewater treatment dosing operations, and ensures stable wastewater treatment results.

[0068] like Figures 1 to 5As shown, this invention discloses a wastewater treatment dosing device, which aims to solve the problems of low efficiency, large material loss, and serious pollution caused by segmented operations in the existing wastewater treatment dosing process. By integrating automated loading, transfer, bag breaking, suction, and bag cleaning functions, it achieves efficient and accurate dosing of chemicals with zero human contact, and is suitable for the dosing needs of wastewater treatment scenarios of different scales.

[0069] Specifically, such as Figure 1 As shown, the wastewater treatment dosing device includes an unmanned vehicle 1 controlled by a control center, capable of automatically traveling between the dosing stations of the process dosing equipment and the reagent warehouse. The control center can precisely control the driving trajectory, start / stop status, and working position of the unmanned vehicle 1 through preset paths or real-time navigation commands, ensuring its efficient travel between the reagent warehouse and the dosing stations of each process dosing equipment. The reagent warehouse is equipped with a warehouse loading and unloading machine 2, also controlled by the control center. This machine has visual recognition and precise gripping functions, automatically identifying the location and specifications of bagged reagents, and then smoothly loading the bagged reagents into the designated position of the unmanned vehicle 1. This completes the loading operation without manual assistance, significantly reducing labor intensity and costs.

[0070] A dosing station is set up next to the dosing equipment in the process, as well as a negative pressure bag breaking platform and station loading and unloading machinery controlled by the control center; the station loading and unloading machinery can unload the bagged agents loaded on the unmanned vehicle to the dosing station next to the dosing equipment in the process (which can be supported by a wooden pallet), transport the bagged agents at the dosing station to the negative pressure bag breaking platform, and then transport the agents to the dosing equipment in the process through the negative pressure bag breaking platform;

[0071] The overall process involves unmanned vehicles loading bagged pharmaceuticals (typically 10-25 kg per bag) into the pharmaceutical warehouse via warehouse loading and unloading machinery. These bags are then transported in batches to the dosing stations at each process's dosing equipment. At the dosing stations, the loading and unloading machinery unloads the bags and stacks them. When dosing is required, the loading and unloading machinery at the dosing stations (i.e., at the process dosing equipment) transfers the bagged pharmaceuticals to the negative pressure bag-breaking platform 3 for dosing. In this invention, the loading and unloading machinery at the stations and warehouse can be multi-axis industrial robots with gripper tools (i.e., loading / unloading robotic arms with grippers), or other unloading or loading platforms and tools with the same function.

[0072] For example, the structure of a relatively simple site loading and unloading machine and warehouse loading and unloading machine is as follows: Figure 6As shown, the device includes a liftable gripper platform that can move on a transverse guide rail. At the bottom of the gripper platform are two parallel, synchronously rotating shafts with gripping claws mounted on them. When the shafts are driven simultaneously, the rotation of the shafts allows the gripping claws to hold or release the bagged medicine. This, combined with the movement and lifting of the gripper platform on the transverse guide rail, enables the loading, unloading, and transfer of bagged medicine.

[0073] A negative pressure bag-breaking platform 3 is installed near the dosing equipment in the process, providing a stable installation foundation for each working component. Along the processing sequence of the bagged medicine, the negative pressure bag-breaking platform 3 integrates a bag-opening processing table 4, a conveying pipeline 5, and a negative pressure feeder 6, forming a continuous operation chain of "bag breaking - suction - bag cleaning - dosing," avoiding the loss and contamination problems caused by material transfer in traditional segmented operations.

[0074] like Figure 2 As shown, the bag-opening processing station 4 is the core component for realizing the breaking of bagged medicines and initial suction. It includes a bag-opening carrier plate 7 for carrying bagged medicines, and a material-taking head 9 equipped with a suction pipe 8 at a corresponding position on the bag-opening carrier plate 7. The suction pipe 8 of the material-taking head 9 can be accurately inserted into or withdrawn from the packaging bag on the bag-opening carrier plate 7 under the action of the driving mechanism, ensuring that a suction channel is quickly established after the bag is broken. The tail end of the material-taking head 9 is connected to the negative pressure feeder 6 through the conveying pipe 5 to form a sealed material conveying path. The negative pressure feeder 6 provides continuous and stable suction to the suction pipe 8 of the bag-opening processing station 4 through the negative pressure generated inside, so that the medicine in the packaging bag can be efficiently sucked into the negative pressure feeder 6, and then accurately conveyed to the inlet of the process drug dosing equipment through the outlet 10 of the negative pressure feeder 6 to complete the drug dosing operation.

[0075] As a preferred embodiment of the present invention, such as Figure 3 As shown, the material receiving head 9 includes a square tank 11. A discharge port 12 is provided on one side of the square tank 11. The discharge port 12 is connected to the conveying pipe 5 via a telescopic corrugated pipe 13. The telescopic corrugated pipe 13 has a certain amount of extension and deflection allowance to adapt to the movement of the material receiving head 9, while ensuring the sealing of the material conveying and preventing drug leakage. The suction pipe 8 is vertically arranged at the top of the square tank 11 and communicates with the interior of the square tank 11, ensuring that the suctioned drug can quickly enter the square tank 11 and be guided to the conveying pipe 5.

[0076] like Figure 4As shown, a drill rod 14 is coaxially arranged at the center of the suction pipe 8. The head end of the drill rod 14 extends outside the suction pipe 8, and its end is designed with a sharp structure to facilitate penetration of the packaging bag. A spiral blade 15 extending along the length of the drill rod 14 is arranged on the circumferential surface of the drill rod 14. While the drill rod 14 rotates to break the bag, the spiral blade 15 can assist in suction by rotating, avoiding the agglomeration of medicine and blocking the suction channel, and promoting the flow of medicine into the suction pipe 8. A bag-opening motor 16 is fixedly installed at the bottom of the square can 11. The lower end of the drill rod 14 is connected to the output shaft of the bag-opening motor 16 through a coupling, and the bag-opening motor 16 provides stable rotational power to the drill rod 14. The square can 11 is mounted on the first mounting plate 17. A drive cylinder 18 is provided on one side of the first mounting plate 17. The output end of the drive cylinder 18 is fixedly connected to the first mounting plate 17, which can drive the first mounting plate 17 and the square can 11 to move in a direction close to or away from the packaging bag, thereby enabling the drill rod 14 to be accurately inserted into the packaging bag to form a bag-breaking operation. After the bag is broken, the suction pipe 8 simultaneously penetrates into the bag, laying the foundation for efficient suction.

[0077] like Figure 4 As shown, to further improve the sealing of the suction after the bag is broken and to prevent the medicine dust from flying, a clamping sleeve 19 is provided at the end of the suction pipe 8. An annular pressure plate 20 is provided at one end of the clamping sleeve 19 facing the packaging bag. The pressure plate 20 is made of elastic material and can fit tightly against the surface of the packaging bag. The other end of the clamping sleeve 19 is inserted into the suction pipe 8, forming a sliding fit with the suction pipe 8, and can move flexibly along the axial direction of the suction pipe 8. A compression spring 21 is provided outside the clamping sleeve 19. The two ends of the compression spring 21 are fixed to the end face of the suction pipe 8 and the shoulder on the circumference of the clamping sleeve 19, respectively. When the drive cylinder 18 pushes the feeding head 9 close to the packaging bag, the pressure plate 20 first contacts the surface of the packaging bag. As the feeding head 9 continues to advance, the compression spring 21 is compressed and generates elastic restoring force, causing the pressure plate 20 to press tightly against the surface of the packaging bag, forming a sealed fit. This effectively prevents medicine dust from overflowing from the bag opening during suction, ensuring a clean working environment and the health of the operators.

[0078] The bottom surface of the square tank 11 is also provided with a one-way air supply port 22 that runs from the outside to the inside. An electrically controlled valve 23 with adjustable opening is installed at the air supply port 22. During the negative pressure suction process, the control center can adjust the opening of the electrically controlled valve 23 in real time according to the pressure value in the negative pressure chamber 42 fed back by the pressure sensor 44, to supplement an appropriate amount of air into the square tank 11, balance the air pressure in the chamber, and avoid pipeline blockage caused by excessively high negative pressure leading to excessively fast drug delivery speed, or reduced delivery efficiency caused by excessively low negative pressure. This ensures that drugs of different particle sizes and specific gravities can be delivered stably, improving the adaptability of the device.

[0079] The bag-breaking carrier plate 7 is arranged on the negative pressure bag-breaking platform 3 at an inclination angle of 5-10° via the first bracket 24. This inclination angle design can both utilize gravity to assist the bagged medicine to automatically slide down to the working position and prevent the bagged medicine from sliding down too fast or shifting its position due to an excessive inclination angle. The bag-opening carrier plate 7 includes two plates 25 symmetrically arranged on both sides of the suction pipe 8. Rotating rollers 26 are evenly arranged on the top surface of the plates 25. The rotating rollers 26 can convert the sliding friction between the bagged medicine and the plates 25 into rolling friction, reducing the resistance when the bagged medicine slides down and allowing it to move smoothly to the designated bag-opening position. The negative pressure bag-breaking platform 3 near the lower end of the bag-opening carrier plate 7 is equipped with a first lifting baffle 27 driven by a lifting cylinder. When the bagged medicine slides down to the working position, the first lifting baffle 27 rises to prevent the bagged medicine from continuing to slide down, achieving precise positioning and ensuring that the material head 9 can accurately align with the packaging bag for bag-breaking operation. After the operation is completed, the first lifting baffle 27 is lowered to facilitate the discharge of empty packaging bags in conjunction with other structures.

[0080] One end of each of the two plates 25 has an integrally formed arc-shaped portion 28. The first bracket 24 is provided with an arc-shaped positioning block 29 that cooperates with the arc-shaped portion 28. The arc-shaped portion 28 and the arc-shaped positioning block 29 form a rotational engagement, providing a stable rotation fulcrum for the shape switching of the plate 25. A rubber pad 30 is fixedly provided between the upper parts of the arc-shaped portions 28. The suction pipe 8 of the material feeding head 9 extends through the perforation on the rubber pad 30 to the top of the rubber pad 30. The rubber pad 30 has a certain degree of elasticity and can provide central support when the bag carrier plate changes its V-shaped shape, and fits tightly with the bottom of the packaging bag, further enhancing the sealing of the suction process and reducing dust leakage.

[0081] like Figure 3 As shown, side plates 31 are vertically arranged on both sides of the two plates 25. The side plates 31 are provided with plate shafts 32 that coincide with the arc center of the arc portion 28. The plate shafts 32 of the two plates 25 are connected to the rocker drive mechanism. Under the drive of the rocker drive mechanism, the two plates 25 can rotate synchronously around the plate shafts 32, realizing flexible switching between V-shaped state and straight plate state.

[0082] like Figure 5As shown, the rocker drive mechanism includes a drive wheel 34 fixedly mounted on the shaft 32 of one of the rocker bodies 25. The drive wheel 34 is driven to rotate by a rocker motor 33. The drive wheel 34 is connected to a transition wheel 35 via a synchronous belt 36. The transition wheel 35 meshes with a driven wheel 37 mounted on the shaft 32 of the other rocker body 25. When the rocker motor 33 starts, it drives the drive wheel 34 to rotate, which in turn drives the transition wheel 35 to rotate via the synchronous belt 36. This meshing of the wheels further drives the driven wheel 37 to rotate in the opposite direction, causing both rocker bodies 25 to rotate synchronously inwards or outwards, thus switching from a straight state to a V-shaped state. In the initial stage of suction, the bag-removing carrier plate 7 remains in a straight position, providing a stable bearing surface for the bagged medicine, making it easy for the material head 9 to accurately insert into the bag. When the medicine in the bag decreases and residue appears, the bag-removing carrier plate 7 switches to a V-shaped state, using gravity to guide the residual medicine to gather at the central suction pipe 8, and in conjunction with negative pressure suction, achieves deep extraction, significantly reducing the residual rate of medicine in the bag and improving material utilization.

[0083] To further optimize the collection effect of residual medicine, the negative pressure bag-breaking platform 3 is also equipped with a pressing mechanism 38. The pressing mechanism 38 includes a pressing plate 40 positioned directly above the bag-breaking carrier plate 7. The pressing plate 40 is driven by a screw and nut pair 39 to move vertically. The screw and nut pair 39 features high transmission accuracy and smooth operation, and can precisely control the lifting height and pressure of the pressing plate 40. At least one air nozzle 41, which can be inserted into the packaging bag, is evenly distributed on the bottom surface of the pressing plate 40. The air nozzle 41 is connected to the air pump circuit through an air pipe. When the bag-unpacking carrier plate 7 switches to the V-shaped state, the screw nut assembly 39 drives the pressing plate 40 to descend, causing the pressing plate 40 to press the packaging bag to achieve positioning. At the same time, the air nozzle 41 is inserted into the packaging bag, and the air pump injects an appropriate amount of air into the bag to support the packaging bag and maintain its expanded shape. This prevents the bag from collapsing and wrinkling due to the reduction of medicine, and prevents residual medicine from being trapped in the wrinkles. It ensures that the residual medicine can be completely gathered to the center under the combined action of gravity and negative pressure, achieving suction without dead corners, further improving material utilization and reducing resource waste.

[0084] like Figure 2 As shown, the negative pressure feeder 6 includes a sealed negative pressure chamber 42. A negative pressure fan 43, which communicates with the inside of the negative pressure chamber 42, is fixedly installed on the top of the negative pressure chamber 42. After the negative pressure fan 43 is started, it can quickly form a stable negative pressure in the negative pressure chamber 42, providing power for the suction of the medicine. A pressure sensor 44 is installed inside the negative pressure chamber 42. The pressure sensor 44 collects the pressure data in the negative pressure chamber 42 in real time and feeds it back to the control center. The control center dynamically adjusts the power of the negative pressure fan 43 and the opening of the electric control valve 23 of the air supply port 22 according to the preset pressure value to ensure that the negative pressure value is stable within the range suitable for the delivery of medicine and to avoid pipeline blockage or delivery failure.

[0085] The lower part of the negative pressure chamber 42 is integrally formed with a downwardly sloping discharge channel 45 and a vertical connecting pipe 46, which together form an inverted V-shaped structure. This structure design can utilize gravity to assist the downward flow of materials while preventing material accumulation in the negative pressure chamber 42. The connecting pipe 46 is sealed and connected to the vertical section at the end of the conveying pipe 5 to ensure that the aspirated agent can be completely delivered into the negative pressure chamber 42. The discharge port 10 is located at the end of the discharge channel 45. A cylindrical part 47 is provided near the discharge port 10 of the discharge channel 45. A discharge shaft 49 driven by a discharge motor 48 is provided inside the cylindrical part 47. Several valve plates 50 are evenly arranged on the circumference of the discharge shaft 49, which are in close contact with the inner wall of the cylindrical part 47. The discharge motor 48 drives the discharge shaft 49 to rotate at a constant speed. Through the rotation of the valve plate 50, the agent in the negative pressure chamber 42 is quantitatively and evenly pushed to the discharge port 10, and then falls into the feed port of the process dosing equipment, so as to achieve precise dosing, ensure the sewage treatment effect, and achieve coordination with negative pressure suction.

[0086] To improve the adaptability of the device to dosing equipment in different processes, the negative pressure feeder 6 has lifting and rotation functions. Its specific structure is complex. For example, the connecting pipe 46 is inserted into the vertical section of the conveying pipe 5, forming a circumferentially limited and vertically movable sliding fit. This ensures that the connecting pipe 46 can stably lift and lower along the vertical section of the conveying pipe 5, while avoiding relative rotation that could affect material conveying. A rotary joint 51 is provided at the lower part of the vertical section of the conveying pipe 5, and a geared disc 53 driven by a rotary drive motor 52 is fixedly installed at the upper part. A lifting cylinder 54 is fixedly installed on the side wall of the connecting pipe 46 facing away from the discharge channel 45. The output end of the lifting cylinder 54 faces downwards and is opposite to the baffle 55 fixedly installed on the vertical section of the conveying pipe 5. When the height of the discharge port 10 needs to be adjusted, the output end of the lifting cylinder 54 extends and presses against the stop bar 55, using the reaction force to push the connecting pipe 46 and the negative pressure feeder 6 to rise and fall as a whole, achieving precise adjustment of the height of the discharge port 10. When the angle of the discharge port 10 needs to be adjusted, the rotary drive motor 52 drives the gear disc 53 to rotate, which in turn drives the vertical section of the conveying pipe 5 and the negative pressure feeder 6 to rotate as a whole. With the help of the rotary joint 51, the pipe is sealed, allowing for flexible adjustment of the angle of the discharge port 10. Through the combination of lifting and rotating functions, the device can quickly adapt to the feed inlets of process dosing equipment with different heights and angles, without the need for additional adjustments to the equipment layout, significantly improving the versatility and application range of the device.

[0087] The negative pressure bag-breaking platform 3 is also equipped with a bag-removing mechanism 56 for automatically cleaning empty packaging bags. The bag-removing mechanism 56 includes a bag-removing motor 57 fixedly mounted on the negative pressure bag-breaking platform 3. The output shaft of the bag-removing motor 57 is fixedly connected to a rotating column 58. A swinging bar 59, which matches the tilt angle of the bag-removing carrier plate 7, is fixedly mounted on the circumference of the rotating column 58. After the medicine is drawn off, the bag-removing carrier plate 7 returns to a straight plate state, the first lifting baffle 27 descends, the bag-removing motor 57 starts and drives the rotating column 58 to rotate. The swinging bar 59 swings synchronously with the rotating column 58, pushing the empty packaging bags on the bag-removing carrier plate 7 to the lower end, so that they fall off the bag-removing carrier plate 7 under the combined action of gravity and swinging thrust, completing the automatic cleaning of empty packaging bags without manual intervention, realizing a fully automated closed loop of the operation process, and further improving the operation efficiency. In some embodiments, it can be adapted to frames for storing packaging bags.

[0088] In another preferred embodiment of the present invention, a temporary storage plate 60 is provided on the negative pressure bag-breaking platform 3 on one side of the bag-breaking carrier plate 7. The temporary storage plate 60 is also inclined, with its high end close to the low end of the bag-breaking carrier plate 7. Rotating rollers 26 are also evenly arranged on the top of the temporary storage plate 60 to facilitate the sliding of the bagged medicine. A second lifting baffle 61 driven by a lifting cylinder is provided between the temporary storage plate 60 and the bag-breaking carrier plate 7. During batch dosing operations, the loading and unloading machinery at the site can first place multiple bags of medicine on the temporary storage plate 60 for temporary storage. When the bag-breaking processing table 4 completes the processing of one bag of medicine, the second lifting baffle 61 is lowered, and the bagged medicine on the temporary storage plate 60 automatically slides down onto the bag-breaking carrier plate 7 under the action of gravity and the rotating rollers 26, without waiting for reloading, greatly shortening the operation interval, improving the efficiency of batch dosing, and adapting to the dosing needs of large-scale sewage treatment.

[0089] As some preferred embodiments, the control center of this invention can also be connected to a drone inspection system. The drone is equipped with a high-definition visual sensor and a wireless transmission module, which can conduct real-time inspections of the water color and the operating status of the chemical dosing equipment in each process of the wastewater treatment area according to a preset inspection path. The high-definition visual sensor captures water turbidity and color changes (such as abnormal yellowing, blackening, or the appearance of discolored floating objects), and simultaneously collects the appearance and operating parameters of the chemical dosing equipment (such as whether there is leakage in the equipment shell, whether the pipeline connection is loose, and whether the working posture of the negative pressure bag breaking platform and the unmanned vehicle is normal). The inspection data is transmitted back to the control center in real time via the wireless transmission module. When the water color is detected to exceed the preset standard range or the equipment operation is abnormal, the control center automatically triggers an early warning mechanism and simultaneously adjusts the transfer frequency of the unmanned vehicle, the suction power of the negative pressure feeder, and the dosage of the chemical, realizing a closed-loop linkage of "inspection-early warning-control" to further ensure the wastewater treatment effect and the stability of equipment operation.

[0090] The wastewater treatment dosing device of this invention achieves fully automated operation of the entire process from loading, transferring, breaking, sucking, and quantitatively adding bagged chemicals to cleaning empty packaging bags through the coordinated cooperation of various components. It not only completely eliminates manual intervention, reducing labor costs and labor intensity, but also effectively reduces chemical loss and dust pollution through sealed operation and residual chemical collection and suction design, improving material utilization and the safety of the working environment. At the same time, it has high versatility and adaptability, and can meet the dosing needs of wastewater treatment of different scales and processes, and has significant practical value and promotion significance.

Claims

1. A wastewater treatment process, comprising the following steps: S1. Transfer and bag breaking: The bagged wastewater treatment dry agent is automatically transferred to the negative pressure bag breaking platform (3) at the dosing station. A sealed bag breaking opening of φ15-φ30mm is formed on the surface of the packaging bag by rotary drilling. During the bag breaking process, the bag breaking opening is kept sealed and adhered to the material taking head (9). Then, the dry agent in the bag is extracted from the packaging bag by negative pressure to achieve the separation of the agent from the packaging bag. When the negative pressure is suctioned, the dust concentration near the work station is ensured to be ≤0.5mg / m³. S2. Precise Dissolution and Preparation: The dry agent, drawn by negative pressure, is delivered to the corresponding closed dissolution tank of each tool dosing equipment. The mass ratio of dry agent to clean water is controlled according to the wastewater treatment agent ratio requirements. Room temperature clean water is injected into the dissolution tank through a metered water pump. The stirring mechanism is started and stirred at a speed of 120-300r / min for 10-30min. At the same time, the temperature in the dissolution tank is monitored in real time by a temperature sensor. When the liquid temperature is <20℃, the heating module is started to raise the liquid temperature to 20-35℃ to ensure that the agent is fully dissolved to form a homogeneous drug solution. S3. Multi-stage filtration and temporary storage: The homogeneous drug solution in the dissolving tank is first filtered through a 100-mesh coarse filter to remove large particulate impurities, and then through a 300-mesh fine filter to remove undissolved fine particulate drugs. The suspended solids content of the drug solution after filtration is ≤5mg / L. The filtered drug solution is then transported to a temporary storage tank. The liquid temperature in the temporary storage tank is maintained at 20-35℃ by a constant temperature module, and the liquid level is controlled at 30%-80% of the total volume of the tank. When it is below 30%, the dissolving tank is automatically replenished, and when it is above 80%, the discharging from the dissolving tank is stopped. S4. Intelligent quantitative dosing: Based on the real-time water quality parameters and treatment load of the wastewater treatment system, the homogeneous chemical solution in the temporary storage tank is delivered to the corresponding process processing unit of the dosing equipment through a variable frequency metering pump. At the same time, the dosing flow rate is monitored in real time by an online flow sensor, and the chemical solution dosing point is kept mixed with the turbulent water. S5. Residual material cleaning: After the bagged medicine is removed, the empty bag is automatically cleaned from the bag breaking station of the negative pressure bag breaking platform (3), and the residual rate of empty bag medicine is ≤1%.

2. A wastewater treatment dosing device, comprising an unmanned vehicle (1) controlled by a control center and capable of automatically traveling between a dosing station and a reagent warehouse of a process dosing equipment; the reagent warehouse is equipped with a warehouse loading and unloading machine (2) controlled by a control center and capable of loading bagged reagents onto the unmanned vehicle (1); a negative pressure bag breaking platform and a station loading and unloading machine controlled by a control center are provided next to the process dosing equipment; the station loading and unloading machine is capable of unloading bagged reagents loaded on the unmanned vehicle to the dosing station, transporting bagged reagents from the dosing station to the negative pressure bag breaking platform (3), and conveying the reagents to the process dosing equipment through the negative pressure bag breaking platform (3); Its features are: The negative pressure bag breaking platform (3) includes, in sequence, a bag breaking processing table (4), a conveying pipe (5), and a negative pressure feeder (6) along the processing order of bagged medicines; The bag-opening processing station (4) includes a bag-opening carrier plate (7) for carrying bagged medicines, and a material-taking head (9) provided with a suction pipe (8) at the bag-opening carrier plate (7); the suction pipe (8) of the material-taking head (9) can be inserted into or withdrawn from the packaging bag on the bag-opening carrier plate (7); the tail end of the material-taking head (9) is connected to the negative pressure feeder (6) through a conveying pipe (5); The negative pressure feeder (6) is used to generate negative pressure inside so that the suction pipe (8) of the bag opening processing table (4) can form a suction of the medicine in the packaging bag; and the negative pressure feeder (6) is provided with a discharge port (10) for feeding medicine to the feed port of the process dosing equipment.

3. The wastewater treatment dosing device according to claim 2, characterized in that: The material feeding head (9) includes a square tank (11), and a discharge port (12) is provided on one side of the square tank (11). The discharge port (12) is connected to the conveying pipe (5) through a telescopic corrugated pipe (13). The suction pipe (8) is located on the top of the square tank (11) and is connected to the inside of the square tank (11). A drill rod (14) is provided at the center of the suction pipe (8), and the head end of the drill rod (14) extends outside the suction pipe (8); a spiral blade (15) extending along the length direction of the drill rod (14) is provided on the circumference of the drill rod (14); a bag-opening motor (16) is provided at the bottom of the square can (11), and the drill rod (14) is connected to the bag-opening motor (16); the square can (11) is mounted on a first mounting plate (17), and a drive cylinder (18) is provided on one side of the first mounting plate (17) for driving the first mounting plate (17) to move so that the drill rod (14) is inserted into the packaging to form a bag-opening operation.

4. The wastewater treatment dosing device according to claim 3, characterized in that: The end of the suction pipe (8) is provided with a compression sleeve (19). One end of the compression sleeve (19) facing the packaging bag is provided with an annular pressure plate (20), and the other end is inserted into the suction pipe (8) to form a sliding fit with the suction pipe (8). The compression sleeve (19) is covered with a compression spring (21). The two ends of the compression spring (21) are fixed to the end face of the suction pipe (8) and the shoulder on the periphery of the compression sleeve (19), respectively.

5. The wastewater treatment dosing device according to claim 3, characterized in that: The bottom surface of the square tank (11) is also provided with a one-way air supply port (22) that is connected from the outside to the inside, and an electric control valve (23) that can adjust the opening degree is provided at the air supply port (22).

6. The wastewater treatment dosing device according to claim 2, characterized in that: The bag-removing carrier plate (7) is arranged at an inclination of 5-10° on the negative pressure bag-breaking platform (3) via the first bracket (24). The bag-removing carrier plate (7) includes two plates (25) arranged on both sides of the suction pipe (8). The top surface of the plate (25) is provided with a rotating roller (26). The negative pressure bag-breaking platform (3) near the lower end of the bag-removing carrier plate (7) is provided with a first lifting baffle (27) driven by a lifting cylinder. An arc-shaped portion (28) is provided at one end of each of the two plates (25). An arc-shaped positioning block (29) is provided on the first bracket (24) to cooperate with the arc-shaped portion (28). The arc-shaped portion (28) and the arc-shaped positioning block (29) form a rotational fit. A rubber pad (30) is provided between the upper parts of the arc-shaped portion (28). The suction pipe (8) of the feeding head (9) extends through the perforation on the rubber pad (30) to the top of the rubber pad (30). Side plates (31) are provided on both sides of the two plates (25), and a plate shaft (32) is provided on the side plate (31) that coincides with the arc center of the arc part (28); the plate shaft (32) of the two plates (25) is connected to the rocker drive mechanism and can switch between V-shaped state and straight plate state under the drive of the rocker drive mechanism. The rocker drive mechanism includes a drive wheel (34) driven by a rocker motor (33) mounted on a plate shaft (32) of a plate body (25). The drive wheel (34) is connected to a transition wheel (35) via a synchronous belt (36). The transition wheel (35) meshes with the driven wheel (37).

7. The wastewater treatment dosing device according to claim 6, characterized in that: The negative pressure bag breaking platform (3) is also provided with a pressing mechanism (38). The pressing mechanism (38) includes a pressing plate (40) located above the bag breaking carrier plate (7) and capable of moving in the up and down direction under the drive of the screw nut pair (39). The pressing plate (40) is provided with an air nozzle (41) that can be inserted into the packaging bag. The air nozzle (41) is connected to the air pump circuit.

8. The wastewater treatment dosing device according to claim 2, characterized in that: The negative pressure feeder (6) includes a negative pressure chamber (42), and a negative pressure fan (43) communicating with the inside of the negative pressure chamber (42) is provided on the top of the negative pressure chamber (42). A pressure sensor (44) is provided inside the negative pressure chamber (42). The lower part of the negative pressure chamber (42) is provided with a downwardly sloping discharge channel (45) and a vertical connecting pipe (46) to form an inverted V-shaped structure; the connecting pipe (46) is connected to the vertical section at the end of the conveying pipe (5); The discharge port (10) is located at the end of the discharge channel (45). A cylindrical part (47) is provided near the discharge port (10) in the discharge channel (45). A discharge shaft (49) driven by a discharge motor (48) is provided inside the cylindrical part (47). Several valve plates (50) that cooperate with the cylindrical part (47) are provided on the circumference of the discharge shaft (49).

9. The wastewater treatment dosing device according to claim 8, characterized in that: The negative pressure feeder (6) has lifting and rotating functions. The connecting pipe (46) is inserted into the vertical section of the conveying pipe (5) and forms a sliding fit with the conveying pipe (5) in a circumferential limiting and moving in the up and down direction. The lower part of the vertical section of the conveying pipe (5) is provided with a rotary joint (51), and the upper part is provided with a gear disc (53) driven by a rotary drive motor (52). A lifting cylinder (54) is provided on the side wall of the connecting pipe (46) facing away from the discharge channel (45). The output end of the lifting cylinder (54) faces downward and is opposite to the baffle (55) fixedly set on the vertical section of the conveying pipe (5).

10. The wastewater treatment dosing device according to claim 6, characterized in that: The negative pressure bag breaking platform (3) is also provided with a bag removal mechanism (56) for removing empty packaging bags from the bag removal processing table (4); the bag removal mechanism (56) includes a rotating column (58) driven by a bag removal motor (57) on the negative pressure bag breaking platform (3), and a swing bar (59) that matches the inclination angle of the bag removal carrier plate (7) is fixedly provided on the circumference of the rotating column (58); the empty packaging bags fall off the bag removal carrier plate (7) by the swing of the swing bar (59); A temporary storage plate (60) is provided on the negative pressure bag breaking platform (3) on one side of the bag breaking plate (7). The temporary storage plate (60) is inclined and one end is close to the bag breaking plate (7). A rotating roller (26) is also provided on the top of the temporary storage plate (60). A second lifting baffle (61) driven by a lifting cylinder is provided between the temporary storage plate (60) and the bag breaking plate (7).

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