A dosing device for sewage treatment

Abstract

The utility model provides a dosing device for sewage treatment, the dosing device comprises a base, a shell fixedly connected to the base, a cover plate fixedly connected to the shell and located on the side of the shell away from the base, a material injection cover rotatably connected to the cover plate is arranged on the cover plate, and a closed space is formed between the base, the shell and the cover plate; a stirring mechanism is fixedly connected to the cover plate, the stirring mechanism comprises a motor fixedly connected to the cover plate and located on the side of the cover plate away from the shell, a rotating rod fixedly connected to the output shaft of the motor, a first blade fixedly connected to the rotating rod and located in the closed space, and a second blade fixedly connected to the rotating rod and located on the side of the first blade away from the motor; wherein the material injection cover is rotated to open, the medicine powder is poured into the closed space, the cover plate blocks part of the medicine powder raised in the closed space, after water is injected into the closed space, the motor drives the rotating rod to rotate, the first blade stirs the medicine powder in the closed space, and the second blade stirs the caked medicine powder sinking to the bottom in the closed space.

Description

Technical Field

[0001] This utility model relates to the field of agricultural wastewater treatment, and in particular to a dosing device for wastewater treatment. Background Technology Agricultural wastewater treatment plants typically use dosing devices that include a dissolving tank or mixing vessel. Powdered chemicals are manually poured into the container, and then the stirring motor is started. The rotating blades mix and dilute the powder with the water to a certain concentration, and finally, the solution is added to the wastewater treatment system through a metering pump.

[0002] However, existing dosing devices for these types of chemicals suffer from the problem of ineffective dissolution of damp, lumpy powders, leading to low utilization rates. The aforementioned powdered chemicals, especially polymeric flocculants like PAM and lime, readily absorb moisture from the air and deliquesce, forming hard clumps during storage and transportation. Most existing dosing devices rely solely on simple paddle or vortex agitation. When these lumpy chemicals are added to the dissolving tank, a gel film often forms on the outside while the inside remains dry powder—a phenomenon known as the "fish-eye effect." This prevents effective dispersal and dissolution by the agitator blades, causing the powder to settle at the bottom. This not only results in significant waste of undissolved chemicals, leading to insufficient dosage and substandard wastewater treatment, but also easily clogs subsequent delivery pipes and precision metering pumps, causing system downtime and heavy maintenance workload. Furthermore, manually pouring powder into containers, which are often wide-open and contain low-density powder, easily causes dust to fly, posing a health risk to workers and resulting in material waste.

[0003] Therefore, it is necessary to provide a dosing device for wastewater treatment that can effectively break up settled powder lumps and effectively reduce powder scattering during dumping. Utility Model Content

[0004] The purpose of this invention is to provide a dosing device for wastewater treatment that can effectively disperse settled powder lumps and reduce powder scattering during pouring.

[0005] According to one aspect of this application, a dosing device for wastewater treatment is provided, the dosing device comprising: Base The housing is fixedly connected to the base; A cover plate is fixedly connected to the housing and located on the side of the housing away from the base. The cover plate is provided with an injection cap that is rotatably connected to the cover plate. A closed space is formed between the base, the housing and the cover plate. A stirring mechanism is fixedly connected to the cover plate. The stirring mechanism includes a motor fixedly connected to the cover plate and located on the side of the cover plate away from the housing, a rotating rod fixedly connected to the output shaft of the motor, a first blade fixedly connected to the rotating rod and located in the enclosed space, and a second blade fixedly connected to the rotating rod and located on the side of the first blade away from the motor. The process involves rotating the filling cap to open it, pouring powder into the enclosed space, with the cap blocking some of the powder from rising in the enclosed space, adding water to the enclosed space, and then the motor driving the rotating rod to rotate. The first blade stirs the powder in the enclosed space, and the second blade stirs the clumps of powder that have settled at the bottom of the enclosed space.

[0006] More preferably, the second blade is provided with a plurality of through holes penetrating the surface of the blade. When the second blade rotates and the agglomerated powder passes through the second blade, the through holes disperse the agglomerated powder along the penetrating direction.

[0007] More preferably, when viewed along a direction parallel to the surface of the base, the distance between the second blade and the base is denoted as D, and satisfies the following relationship: 1cm≤D≤3cm; Where cm is a unit of length, centimeter.

[0008] More preferably, the dosing device further includes: A pumping mechanism is fixedly connected to the base; The water injection pipe is fixedly connected to the housing and is located on the side of the housing away from the pumping mechanism; The water injection pipe passes through the shell and connects to the enclosed space.

[0009] More preferably, the pumping mechanism includes: A water pump is fixedly connected to the base, and the water pump is provided with a pumping end and a water outlet end; A water pumping pipe is fixedly connected to the water pumping end and also fixedly connected to the housing. The water pump pipe passes through the shell and connects to the enclosed space.

[0010] More preferably, the pumping mechanism further includes: A water outlet pipe is fixedly connected to the water outlet end; A meter is fixedly connected to the water outlet pipe and connected to the water outlet. The meter is electrically connected to the water pump to control the pumping flow rate of the water pump.

[0011] More preferably, the dosing device is further provided with a limiting member, which is fixedly connected to the housing and located between the housing and the pumping mechanism; The water pumping pipe is fixedly connected inside the limiting member, and the limiting member supports the water pumping pipe.

[0012] More preferably, the pumping mechanism is further provided with a first valve, which is rotatably connected to the outlet pipe and located on the side of the meter away from the base.

[0013] More preferably, the dosing device is further provided with a drain pipe, which is fixedly connected to the housing and located on the side of the housing away from the enclosed space, and passes through the housing and communicates with the enclosed space; The drain pipe is also equipped with a second valve, which is rotatably connected to the drain pipe.

[0014] More preferably, the motor drives the rotating rod to rotate in a first direction, and drives the first blade and the second blade to rotate in the same first direction.

[0015] This utility model has the following beneficial effects: The rotating rod is equipped with a first blade and a second blade, with the second blade located at the end of the rod closer to the base. This allows the second blade to rotate at the bottom of the enclosed space, breaking up the settled powder clumps and preventing incomplete dissolution. Furthermore, when the powder is poured into the enclosed space through the filling cap, the cap plate blocks any powder that is thrown into the space, effectively reducing powder scattering, preventing pollution of the surrounding air, and minimizing material waste caused by powder scattering. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the dosing device described in one embodiment of this application; Figure 2 This is a schematic diagram of the planar structure of the dosing device described in one embodiment of this application; Figure 3 For the Figure 1 A schematic diagram of the cross-section cut along the cutting line AA; Figure 4This is a three-dimensional structural diagram of the stirring mechanism in the dosing device according to one embodiment of this application; Explanation of reference numerals in the attached drawings: 100, dosing device; 10, base; 20, shell; 30, cover plate; 31, filling cover; 40, enclosed space; 50, stirring mechanism; 51, motor; 52, rotating rod; 53, first blade; 54, second blade; 54A, through hole; 60, pumping mechanism; 61, pump; 62, pumping pipe; 63, outlet pipe; 64, metering device; 65, first valve; 70, water injection pipe; 80, limiting element; 90, drain pipe; 91, second valve; F1, first direction. Detailed Implementation

[0018] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please refer to Figure 1 - Figure 4 One embodiment of this application provides a dosing device 100 for wastewater treatment, the dosing device 100 including: a base 10, a shell 20, a cover plate 30 and a stirring mechanism 50.

[0022] The housing 20 is fixedly connected to the base 10. The cover plate 30 is fixedly connected to the housing 20 and is located on the side of the housing 20 away from the base 10. The cover plate 30 is provided with a filling cover 31 that is rotatably connected to the cover plate 30. A closed space 40 is formed between the base 10, the housing 20, and the cover plate 30. The stirring mechanism 50 is fixedly connected to the cover plate 30. The stirring mechanism 50 includes a motor 51 fixedly connected to the cover plate 30 and located on the side of the cover plate 30 away from the housing 20, a rotating rod 52 fixedly connected to the output shaft of the motor 51, a first blade 53 fixedly connected to the rotating rod 52 and located within the closed space 40, and a second blade 54 fixedly connected to the rotating rod 52 and located on the side of the first blade 53 away from the motor 51. Rotate to open the filling cap 31 and pour the medicine powder into the closed space 40. The cap 30 blocks some of the medicine powder that rises in the closed space 40. After water is injected into the closed space 40, the motor 51 drives the rotating rod 52 to rotate. The first blade 53 stirs the medicine powder in the closed space 40, and the second blade 54 stirs the clumps of medicine powder that have settled at the bottom of the closed space 40.

[0023] The base 10, made of metal profiles, serves as the fundamental support component of the entire dosing device 100, providing a stable working platform. The housing 20 is a cylindrical structure, its lower end fixedly connected to the upper surface of the base 10 via bolts. The cover plate 30, through its edge flange and sealing gasket, is fixedly connected to and seals the top opening of the housing 20. The cover plate 30, housing 20, and base 10 together form a closed space 40, serving as the main container for the drug solution, isolating the closed space 40 from the external environment. A filling cap 31 is provided on the cover plate 30, which is rotatably connected to the cover plate 30 via a pivot. When not adding drugs, the filling cap 31 remains closed to the cover plate 30, ensuring the airtightness of the dissolving space. When drug powder needs to be added, the filling cap 31 is rotated open to create a limited filling channel. Operators can pour in the powder through this channel. Most of the flying powder is blocked and shielded by the inner surface of the cover plate 30, effectively falling back to the bottom of the container, thus minimizing dust escape, protecting operator health, and reducing material loss. The stirring mechanism 50 is fixedly connected to the cover plate 30. This mechanism includes a motor 51, a rotating rod 52, a first blade 53, and a second blade 54. The motor 51, as the power source, is fixedly installed on the upper surface of the cover plate 30 via a flange connection, separating the motor 51 from the liquid environment. The output shaft of the motor 51 extends vertically downwards through a sealed bearing hole on the cover plate 30 into the enclosed space 40. The upper end of the rotating rod 52 is fixedly connected to the output shaft of the motor 51 via a keyway, rotating synchronously with the motor 51. The lower end of the rotating rod 52 extends close to the base 10, but a small space is maintained between it and the base 10. The first blade 53 is fixedly connected to the middle of the rotating rod 52. As the main stirring impeller, it is mainly responsible for stirring and mixing most of the liquid medicine in the enclosed space 40, promoting the initial dissolution of the powder medicine. The second blade 54 is fixedly connected to the end of the rotating rod 52, that is, located below the first blade 53 and on the side closer to the base 10. A small space is left between the second blade 54 and the base 10 to avoid the blade scraping against the base 10 below when rotating. Undissolved powder lumps with higher density or deliquescent fish-eye-shaped clumps will settle at the bottom of the container under the action of gravity. Conventional stirrers will form a stirring dead zone here. However, in this design, the second blade 54 rotates close to the bottom of the enclosed space 40 at a high linear velocity, generating strong local shear force and mechanical impact force on the deposited powder lumps. It can effectively grind and break up the clumps and destroy their outer gel film, exposing the dry powder medicine inside to the liquid medicine, thereby completely solving the problems of powder settling and clumping at the bottom and insufficient dissolution, and significantly improving the utilization rate of the powder medicine. During operation, the operator rotates to open the filling cover 31 and adds the powder, completing the near-dust-free filling process under the cover plate 30. Water is then injected into the enclosed space 40 through the water injection pipe 70.After water is added to the predetermined level, motor 51 is started. Motor 51 drives rotor 52 to rotate in the predetermined first direction F1, thereby causing the first blade 53 and the second blade 54 to rotate synchronously. The first blade 53 stirs the main body of the liquid, while the second blade 54 focuses on breaking up the clumps at the bottom. Working together, they can prepare a solution with uniform and sufficient concentration in a short time for subsequent addition or direct discharge through the outlet pipe 63 for the treatment of agricultural wastewater.

[0024] More preferably, the second blade 54 is provided with a plurality of through holes 54A penetrating the surface of the blade. When the second blade 54 rotates and the agglomerated powder passes through the second blade 54, the through holes 54A disperse the agglomerated powder along the penetrating direction.

[0025] The through-holes 54A are integrally formed on the second blade 54, uniformly distributed on both the front and back surfaces of the second blade 54, penetrating the thick surfaces on both sides of the second blade 54, forming channels that allow fluid and powder particles to pass through. When the motor drives the rotating rod and the second blade 54 fixed thereon to rotate at high speed along the first direction F1, these through-holes 54A also rotate with the blade. When the second blade 54 rotates at high speed in the liquid, the liquid carrying agglomerated powder at the bottom of the enclosed space 40 impacts the surface of the second blade 54. At this time, some of the liquid is forced to flow from the front surface of the second blade 54 through the through-holes to the back surface. These high-speed jets create additional shear and impact forces on the agglomerated powder that is trying to bypass the second blade 54, tearing and breaking up the agglomerated powder from multiple angles, further assisting the second blade 54 at the bottom to disperse the agglomerated powder.

[0026] More preferably, when viewed along a direction parallel to the surface of the base 10, the distance between the second blade 54 and the base 10 is denoted as D, and satisfies the relationship: 1cm≤D≤3cm. cm is a unit of length.

[0027] In this design, viewed from a horizontal projection angle parallel to the surface of the base 10, the vertical distance between the lowest point of the second blade 54 and the upper surface of the base 10 is denoted as D. This distance D is limited to a range of 1 to 3 centimeters and can be adjusted according to the solubility of the powder and the design of the water outlet pipe 63 and the drain pipe. If the second blade 54 is in direct contact with the surface of the base 10, continuous rigid friction and scraping may occur under high-speed rotation, leading to rapid blade wear and even damage to the motor 51 or the rotating rod 52. Furthermore, in actual operation, small particles or incompletely crushed, extremely hard powder lumps may accidentally fall in. A zero-gap design easily causes these foreign objects to become stuck between the blade and the bottom, instantly causing the stirring mechanism 50 to stall. Leaving a distance D allows such small foreign objects to pass through, avoiding the risk of jamming. The core function of this design is to stir and disperse the powder. When the second blade 54 rotates within a range of 1-3 cm from the bottom, a strong low-pressure vortex zone is formed below it due to the streamlined design of the blade. This vortex generates enormous fluid shear force, which can not only roll up the deposited powder clumps, but also tear and dissolve the clumps using the impact force of the liquid itself.

[0028] More preferably, the dosing device 100 further includes a pumping mechanism 60 and a water injection pipe 70.

[0029] The pumping mechanism 60 is fixedly connected to the base 10. The water injection pipe 70 is fixedly connected to the housing 20 and is located on the side of the housing 20 opposite to the pumping mechanism 60. The water injection pipe 70 passes through the housing 20 and connects to the enclosed space 40.

[0030] The pumping mechanism 60 is bolted to the upper surface of the base 10. The support of the base 10 effectively reduces the vibration generated by the pumping mechanism 60, improving the operational stability of the entire dosing device 100. The water injection is achieved through a section of rigid PVC pipe, which is fixedly connected to the side wall of the housing 20. Its specific connection point is set on the side of the housing 20 away from the pumping mechanism 60, achieving a separate layout for the inlet and outlet water pipes 63, and avoiding cross-entanglement between multiple pipes inside and outside the housing 20. The water injection pipe 70 connects to the upper area of ​​the enclosed space 40 through a through-hole in the housing 20, using a sealing ring. The end of the pipe is higher than the preset maximum liquid level to prevent backflow of the chemical solution. During the water injection process, external water sources such as tap water or groundwater are injected into the enclosed space 40 through the water injection pipe 70 driven by a pump. When the water flows from the top of the enclosed space 40, it can flush and premix the previously added chemical powder, reducing the burden of subsequent stirring. After the powdered medicine is fully dissolved into a uniform solution in the water by the stirring mechanism 50, the pumping mechanism 60 is responsible for extracting the solution quantitatively through the pump and transporting it to the sewage treatment point through the external pipeline.

[0031] More preferably, the pumping mechanism 60 includes a pump 61 and a pumping pipe 62.

[0032] The water pump 61 is fixedly connected to the base 10, and the water pump 61 is provided with a water intake end and a water outlet end. The water intake pipe 62 is fixedly connected to the water intake end and also fixedly connected to the housing 20. The water intake pipe 62 passes through the housing 20 and connects to the enclosed space 40.

[0033] The water pump 61 is a centrifugal pump, and its pump body is firmly fixed to the upper surface of the base 10 with bolts, providing a solid and stable mounting base for the water pump 61. The water pump 61 has a standard suction end (inlet) and an outlet end (outlet). The suction pipe 62 is made of corrosion-resistant PVC rigid pipe, one end of which is fixedly connected to and sealed to the suction end of the water pump 61 via a quick connector. The other end of the suction pipe 62 extends to the housing 20, is fixedly connected to and sealed to the bottom side wall of the housing 20, and penetrates the side wall of the housing 20, allowing its opening to extend into the enclosed space 40 and remain in communication with it. The opening of the suction pipe 62 within the enclosed space 40 is located near the bottom of the housing 20. The main function of fixing the water pump 61 to the base 10 is to reduce vibration and noise. The vibration of the water pump 61 during operation can be effectively absorbed and dispersed by the stable base 10. The inlet of the water pump 62 is located near the bottom of the container to ensure that the prepared medicine solution can be completely and fully extracted and utilized.

[0034] More preferably, the pumping mechanism 60 further includes an outlet pipe 63 and a meter 64.

[0035] The water outlet pipe 63 is fixedly connected to the water outlet end. The meter 64 is fixedly connected to the water outlet pipe 63 and is connected to the water outlet pipe 63.

[0036] The outlet pipe 63 serves as the channel for delivering the chemical solution to the wastewater treatment point. One end of the outlet pipe 63 is sealed and fixed to the outlet end of the water pump 61, extending upwards from the connection point. The other end of the outlet pipe 63 is used to connect to the pipeline that delivers the chemical solution to the wastewater. To achieve precise dosing, a meter 64 is installed on the outlet pipe 63, connecting to the chemical solution flow space within the pipe. This meter 64 is a flow meter 64, capable of monitoring the flow rate of the chemical solution flowing through the outlet pipe 63. By connecting the meter 64 in series on the outlet pipe 63, real-time monitoring of the chemical solution dosage for wastewater treatment is achieved. The meter 64 can continuously measure and display the instantaneous flow rate and cumulative flow rate, enabling operators to accurately grasp the total amount of chemical solution added to the wastewater treatment system, changing the traditional extensive mode that relies on experience and realizing the automation of chemical solution dosing.

[0037] More preferably, the meter 64 is electrically connected to the water pump 61 to control the pumping flow rate of the water pump 61.

[0038] The metering device 64 integrates a flow sensor, a signal converter, and a signal transmitter. It can convert the detected liquid flow data into a 4-20mA current signal in real time and transmit the current signal to the integrated electronic control system of the water pump 61. The electronic control system of the water pump 61 receives the flow signal from the metering device 64 and controls the pumping power according to the signal to regulate the efficiency of liquid extraction. This directly affects the flow rate of the liquid out of the outlet pipe 63, ensuring that the liquid added to the sewage treatment system can control the flow rate and maintain a stable output.

[0039] More preferably, the dosing device 100 is further provided with a limiting member 80, which is fixedly connected to the housing 20 and located between the housing 20 and the pumping mechanism 60. The pumping pipe 62 is fixedly connected inside the limiting member 80, and the limiting member 80 supports the pumping pipe 62.

[0040] The limiting component 80 is a pipe fixing clamp. The limiting component 80 has a support base, which is welded to the outer wall of the housing 20. After the water pipe 62 is led out of the housing 20, it is constrained and fixed within the clamp of the limiting component 80 before reaching the pumping end of the pump 61. The limiting component 80 serves to limit the vertically extending water pipe 62 in the horizontal direction, preventing the water pipe 62 from shaking due to vibration of the pump 61 during pumping. It also prevents the connection between the water pipe 62 and the pump 61 from loosening, further preventing leakage of the liquid.

[0041] More preferably, the pumping mechanism 60 is further provided with a first valve 65, which is rotatably connected to the outlet pipe 63 and located on the side of the metering device 64 away from the base 10.

[0042] The first valve 65 has a valve body inside the outlet pipe 63, which is fixed to the inner wall of the outlet pipe 63 via a flange interface. The first valve 65 is located downstream of the metering device 64, meaning the liquid flows sequentially through the pump 61, the metering device 64, and then to the first valve 65. The valve body of the first valve 65 has a rotatable operating handle. Rotating this handle approximately 90 degrees changes the direction of the valve body within the outlet pipe 63, thus opening or closing the pipeline. During system startup, the first valve 65 can be closed first, the pump 61 started, and after it has stabilized, the valve can be slowly opened. This avoids the pressure surge during pump startup directly impacting the precision metering device 64, providing buffer protection and extending its service life. Furthermore, the first valve 65 is designed to be close to the external supply pipeline on the outlet pipe 63, allowing for emergency stop of the liquid supply. When it is necessary to pause the dosing of chemicals at the wastewater treatment plant, the operator simply stands next to the dosing device 100 and manually rotates the handle of the first valve 65 to the closed position, thus stopping the chemical delivery. To resume the chemical supply, simply rotate the handle to the open position. The entire process is quick and intuitive.

[0043] More preferably, the dosing device 100 is further provided with a drain pipe 90, which is fixedly connected to the housing 20 and located on the side of the housing 20 away from the enclosed space 40, and passes through the housing 20 and communicates with the enclosed space 40. The drain pipe 90 is also provided with a second valve 91, which is rotatably connected to the drain pipe 90.

[0044] The drain pipe 90 is a short PVC pipe, fixed to the lowest point of the side of the housing 20 by welding. It is mainly used to drain residual waste liquid or other residues besides powder from the enclosed space 40. A second valve 91 is threadedly connected to the top of the drain pipe 90. The second valve 91 includes a rotary ball valve located inside the drain pipe 90 and a handle outside the drain pipe 90. The operator rotates the handle to rotate the ball valve, further controlling whether the flow within the drain pipe 90 passes through it. When the dosing device 100 needs to drain the remaining liquid from the enclosed space 40, since the drain pipe 90 is located at the lowest point of the side of the housing 20, simply opening the second valve 91 allows gravity to automatically drain most of the remaining liquid from the enclosed space 40.

[0045] More preferably, the motor 51 drives the rotating rod 52 to rotate along the first direction F1, and drives the first blade 53 and the second blade 54 to rotate also along the first direction F1.

[0046] The output shaft of motor 51 rotates in a preset first direction F1, which is a clockwise direction when viewed from top to bottom. When motor 51 starts, the output shaft drives the rotating rod 52 and the first blade 53 and the second blade 54 fixed on the rotating rod 52 to rotate synchronously. As the first blade 53 and the second blade 54 rotate in the same direction, a unified and directional fluid circulation is formed in the enclosed space 40. The upper liquid is pushed downward by the first blade 53, and the bottom liquid is accelerated and converged upward by the second blade 54.

[0047] Therefore, by having a first blade 53 and a second blade 54 on the rotating rod 52, with the second blade 54 located at the end of the rotating rod 52 near the base 10, the second blade 54 can rotate at the bottom of the enclosed space 40, breaking up the settled powder lumps and preventing incomplete dissolution of the powder lumps. Furthermore, by using the method of covering the powder raised in the enclosed space 40 when pouring the powder into the enclosed space 40 through the filling cover 31, the phenomenon of powder flying is effectively reduced, preventing the spread of powder from polluting the surrounding air environment and reducing material waste caused by powder flying.

[0048] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A dosing device for wastewater treatment, characterized in that, The dosing device includes: Base The housing is fixedly connected to the base; A cover plate is fixedly connected to the housing and located on the side of the housing away from the base. The cover plate is provided with an injection cap that is rotatably connected to the cover plate. A closed space is formed between the base, the housing and the cover plate. A stirring mechanism is fixedly connected to the cover plate. The stirring mechanism includes a motor fixedly connected to the cover plate and located on the side of the cover plate away from the housing, a rotating rod fixedly connected to the output shaft of the motor, a first blade fixedly connected to the rotating rod and located in the enclosed space, and a second blade fixedly connected to the rotating rod and located on the side of the first blade away from the motor. The process involves rotating the filling cap to open it, pouring powder into the enclosed space, with the cap blocking some of the powder from rising in the enclosed space, adding water to the enclosed space, and then the motor driving the rotating rod to rotate. The first blade stirs the powder in the enclosed space, and the second blade stirs the clumps of powder that have settled at the bottom of the enclosed space.

2. The wastewater treatment dosing device according to claim 1, characterized in that, The second blade is provided with several through holes penetrating the surface of the blade. When the second blade rotates and the agglomerated powder passes through the second blade, the through holes disperse the agglomerated powder along the penetrating direction.

3. The wastewater treatment dosing device according to claim 1, characterized in that, Viewed along a direction parallel to the surface of the base, the distance between the second blade and the base is denoted as D, and satisfies the following relationship: 1cm≤D≤3cm; Where cm is a unit of length, centimeter.

4. A wastewater treatment dosing device according to claim 1, characterized in that, The dosing device also includes: A pumping mechanism is fixedly connected to the base; The water injection pipe is fixedly connected to the housing and is located on the side of the housing away from the pumping mechanism; The water injection pipe passes through the shell and connects to the enclosed space.

5. A wastewater treatment dosing device according to claim 4, characterized in that, The pumping mechanism includes: A water pump is fixedly connected to the base, and the water pump is provided with a pumping end and a water outlet end; A water pumping pipe is fixedly connected to the water pumping end and also fixedly connected to the housing. The water pump pipe passes through the shell and connects to the enclosed space.

6. A wastewater treatment dosing device according to claim 5, characterized in that, The pumping mechanism also includes: A water outlet pipe is fixedly connected to the water outlet end; A meter is fixedly connected to the water outlet pipe and is connected to the water outlet pipe; The meter is electrically connected to the water pump to control the pumping flow rate of the water pump.

7. A wastewater treatment dosing device according to claim 6, characterized in that, The dosing device is also provided with a limiting member, which is fixedly connected to the housing and located between the housing and the pumping mechanism; The water pumping pipe is fixedly connected inside the limiting member, and the limiting member supports the water pumping pipe.

8. A wastewater treatment dosing device according to claim 6, characterized in that, The pumping mechanism is also provided with a first valve, which is rotatably connected to the outlet pipe and located on the side of the meter away from the base.

9. A wastewater treatment dosing device according to claim 1, characterized in that, The dosing device is also equipped with a drain pipe, which is fixedly connected to the housing and located on the side of the housing away from the enclosed space, and passes through the housing and communicates with the enclosed space; The drain pipe is also equipped with a second valve, which is rotatably connected to the drain pipe.

10. A wastewater treatment dosing device according to claim 1, characterized in that, The motor drives the rotating rod to rotate in the first direction, and also drives the first blade and the second blade to rotate in the first direction.

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