Dose-adjustable sewage treatment dosing device

Abstract

The invention discloses a dosage-adjustable sewage treatment dosing device which comprises a medicine storage box, a dosing conveying device and a liquid storage box, magnetic flocculant powder is placed in the medicine storage box, a first motor is fixedly arranged at the top of the medicine storage box, and an output shaft of the first motor penetrates through the inner top wall of the medicine storage box to be fixedly connected with a first transmission shaft; a plurality of stirring rods are fixedly arranged on the first transmission shaft along the axis, the dosing conveying device comprises a conveying pipeline, a plurality of groups of electromagnetic coils, a driver, a controller and a nozzle, each group of electromagnetic coils is divided into a plurality of short coil acceleration sections, and the length of each section of short coil is sequentially increased from a powder inlet to a powder outlet of the conveying pipeline. The powder feeding device has the beneficial effects that current is adopted to generate a magnetic field to drive powder feeding, the flow of powder is adjusted by controlling the frequency of the current, and therefore adjustment of the discharging dosage is achieved; by changing the phase sequence of the current, the powder moves back and returns to the medicine storage box, and residual waste of the powder in the conveying pipeline is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly to a sewage treatment chemical dosing device with adjustable dosage. Background Art

[0002] During sewage treatment, polymerizing and sedimenting pollutants in the sewage to improve the treatment efficiency and water quality cleanliness is an important link in the sewage treatment process. In the prior art, sewage purification is usually carried out using a flocculant. The flocculant can aggregate fine particles and natural colloidal particles in the water into large flocculates, thereby purifying the sewage. The dosing of the flocculant is one of the most important processes in sewage treatment. The flocculant is put into the sewage to undergo a chemical reaction, and the impurities in the sewage are coagulated and filtered. Therefore, the dosing device for the flocculant is particularly important.

[0003] The existing flocculant dosing equipment does not have a dosage adjustment function, resulting in waste of the flocculant. Moreover, the flocculant is transported through a screw conveyor, and the flocculant powder is likely to remain in the conveying pipeline during the transportation process, causing waste. Therefore, an automatic flocculant dosing equipment with a dosage adjustment function is proposed. Summary of the Invention

[0004] Aiming at the above-mentioned prior art, the present invention aims to provide a sewage treatment chemical dosing device with adjustable dosage, mainly solving the technical problems existing in the above background art.

[0005] To achieve the above object, the technical solution of the embodiment of the present invention is realized as follows:

[0006] A dosage-adjustable sewage treatment chemical dosing device, comprising a chemical storage tank, a chemical dosing and conveying device and a liquid storage tank. Magnetic flocculant powder is placed in the chemical storage tank. A support rod is provided at the bottom of the chemical storage tank, and the support rod is fixedly connected to the top of the liquid storage tank. A first motor is fixedly provided at the top of the chemical storage tank. The output shaft of the first motor passes through the inner top wall of the chemical storage tank and is fixedly connected to a first transmission shaft. A plurality of stirring rods are fixedly provided on the first transmission shaft along the axis. The chemical dosing and conveying device includes a conveying pipeline, multiple groups of electromagnetic coils, a driver, a controller and a nozzle. The conveying pipeline is installed at the bottom of the chemical storage tank, and the conveying pipeline is communicated with the chemical storage tank. The electromagnetic coils are wound around the outer wall of the conveying pipeline. The electromagnetic coils are electrically connected to the driver, and the driver is electrically connected to the controller. Each group of electromagnetic coils is divided into several short coil acceleration segments. From the powder inlet to the powder outlet of the conveying pipeline, the length of each short coil increases in turn. The outlet of the conveying pipeline is connected to the nozzle. A feed hopper is installed at the top of the liquid storage tank, and the nozzle blows towards the feed hopper. The feed hopper is communicated with the liquid storage tank. The liquid storage tank is divided into an upper mixing tank and a lower finished product tank. A first water inlet pipe is provided on the side wall of the mixing tank. A stirring device is installed in the mixing tank. The mixing tank is communicated with the finished product tank through a medicine conveying pipe. A liquid outlet pipe is provided on the side wall of the liquid storage tank.

[0007] Preferably, a heating plate is installed on the outer side wall of the feed hopper.

[0008] Preferably, the stirring device includes a second motor and stirring blades. A plurality of second motors are provided at the top of the mixing tank. The output shaft of the second motor passes through the inner top wall of the mixing tank and is fixedly connected to a second transmission shaft. A plurality of stirring blades are fixedly provided on the second transmission shaft along the axis.

[0009] Preferably, the stirring blades are provided with perforations.

[0010] Preferably, a liquid level gauge is provided on the finished product tank.

[0011] Preferably, a tubular magnetic concentrating ring is provided outside the electromagnetic coils.

[0012] Preferably, a premixing barrel is further included. The feed hopper is fixedly arranged above the premixing barrel. A second water inlet pipe is provided on the side wall of the premixing barrel. A conical surface with a smaller upper part and a larger lower part is provided in the premixing barrel. Both ends of the conical surface are respectively communicated with the feed hopper and the mixing tank. A plurality of water spraying holes are provided on the conical surface. A water adding cavity is formed between the conical surface and the inner wall of the premixing barrel. The second water inlet pipe is communicated with the water adding cavity.

[0013] Preferably, the axis of the water spraying hole and the axis of the premixing barrel are at 45°.

[0014] The beneficial effects of the present invention are as follows:

[0015] (1) The powder feeding is driven by generating a magnetic field with an electric current. The powder flow rate is adjusted by controlling the frequency of the electric current. When the current frequency is high, the generated magnetic field is strong, the powder moves fast, and the flow rate is large; when the frequency is low, the generated magnetic field is weak, the flow is slow, and the flow rate is small. By adjusting the powder flow rate, the dosing amount is thus adjusted.

[0016] (2) By changing the phase sequence of the electric current, the powder moves back and returns to the medicine storage tank, avoiding the waste of powder residue in the conveying pipeline.

[0017] (3) The first motor is driven to drive the first transmission shaft to rotate, and multiple stirring rods stir the magnetic flocculant powder in the medicine storage tank, avoiding material caking, and at the same time making the powder in a fluidized state to avoid the aggregation and segregation of magnetic powder. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a sewage treatment chemical dosing device with adjustable dosage in an embodiment of the present application;

[0019] Figure 2 It is a front sectional view of a sewage treatment chemical dosing device with adjustable dosage in an embodiment of the present application;

[0020] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0021] Figure 4 It is a sectional schematic view of the conveying pipeline in an embodiment of the present application;

[0022] Figure 5 It is a current diagram of the electromagnetic coil in an embodiment of the present application;

[0023] Figure 6 It is a phase sequence diagram of the electromagnetic coil in an embodiment of the present application;

[0024] Description of the Reference Numerals in the Drawings:

[0025] 1. Medicine storage tank; 2. Magnetic flocculant powder; 3. Support rod; 4. First motor; 5. First transmission shaft; 6. Stirring rod; 7. Conveying pipeline; 8. Electromagnetic coil; 9. Driver; 10. Controller; 11. Nozzle; 12. Feed hopper; 13. Mixing tank; 14. Finished product tank; 15. Medicine conveying pipe; 16; Liquid outlet pipe; 17. Heating plate; 18. Second motor; 19. Second transmission shaft; 20. Stirring blade; 21. Perforation; 22. Liquid level gauge; 23. Magnetic concentrating ring; 24. Premixing barrel; 25. Second water inlet pipe; 27. Conical surface; 28. Water spraying hole; 29. Water adding cavity; 30. First water inlet pipe. Detailed Embodiment

[0026] The technical solution of the present invention will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments. However, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0027] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0028] Embodiment 1

[0029] Please refer to the attached Figures 1-6 , this application provides a sewage treatment chemical dosing device with adjustable dosage, including a chemical storage tank 1, a chemical dosing and conveying device, and a liquid storage tank. Magnetic flocculant powder 2 is placed in the chemical storage tank 1. A support rod 3 is provided at the bottom of the chemical storage tank 1, and the support rod 3 is fixedly connected to the top of the liquid storage tank. A first motor 4 is fixedly provided at the top of the chemical storage tank 1. The output shaft of the first motor 4 passes through the inner top wall of the chemical storage tank 1 and is fixedly connected to a first transmission shaft 5. A plurality of stirring rods 6 are fixedly provided on the first transmission shaft 5 along the axis. The chemical dosing and conveying device includes a conveying pipeline 7, multiple groups of electromagnetic coils 8, a driver 9, a controller 10, and a nozzle 11. The conveying pipeline 7 is installed at the bottom of the chemical storage tank 1, and the conveying pipeline 7 is communicated with the chemical storage tank 1. The electromagnetic coils 8 are wound around the outer wall of the conveying pipeline 7. The electromagnetic coils 8 are electrically connected to the driver 9, and the driver 9 is electrically connected to the controller 10. Each group of the electromagnetic coils 8 is divided into several short coil acceleration segments. From the powder inlet to the powder outlet of the conveying pipeline 7, the length of each short coil increases in turn. The outlet of the conveying pipeline 7 is connected to the nozzle 11. A feed hopper 12 is installed at the top of the liquid storage tank, and the nozzle 11 blows towards the feed hopper 12. The feed hopper 12 is communicated with the liquid storage tank. The liquid storage tank is divided into an upper mixing tank 13 and a lower finished product tank 14. A first water inlet pipe 30 is provided on the side wall of the mixing tank 13. A stirring device is installed in the mixing tank 13. The mixing tank 13 is communicated with the finished product tank 14 through a medicine conveying pipe 15. A liquid outlet pipe 16 is provided on the side wall of the liquid storage tank.

[0030] During use, the first motor 4 is driven to rotate the first transmission shaft 5, and multiple stirring rods 6 stir the magnetic flocculant powder 2 in the medicine storage tank 1 to prevent the material from caking, and at the same time make the powder in a fluidized state to avoid the aggregation segregation of magnetic powder. At the same time, water is introduced into the mixing tank 13 through the first water inlet pipe 30. When the water level reaches the set height, the water addition is stopped. At the same time, an electric current is passed through the electromagnetic coil 8. Each phase winding is composed of several short coils connected in series. There are three phases A, B, and C in total, and the three phases are connected together at the common end. The current pulses of each phase arrive in turn. The electromagnetic coil 8 is connected to the output terminal of each phase of the driver 9. There are buttons, knobs or display devices on the driver 9 that can adjust the current. Through the adjustment device, the output current magnitude and phase of the driver 9 can be subdivided, so that the current and phase between each phase can overlap to improve the smoothness of powder feeding. The inside of the driver 9 is a power switch amplification circuit. The circuit processes and amplifies the control pulses sent by the controller 10 to drive each phase winding coil. There are buttons, knobs or display devices on the controller 10 that can set the pulse signal frequency, pulse width and adjustable phase sequence of the pulse phase sequence, and can output multiple sequential command pulses and direction signals. By controlling the frequency of the current, the flow rate of the powder is adjusted. When the current frequency is high, the generated magnetic field is strong, the powder moves fast, and the flow rate is large; when the frequency is low, the generated magnetic field is weak, the flow is slow, and the flow rate is small. By adjusting the powder flow rate, the dosing amount is adjusted. The magnetic flocculant powder 2 in the conveying pipe 7 is blown into the feed hopper 12 through the nozzle 11, and then enters the mixing tank 13. The stirring device in the mixing tank 13 is started to stir and mix into a flocculant solution. When the set time is reached, the phase sequence of the current is changed, and the powder moves back to the medicine storage tank 1 to avoid the residual waste of the powder in the conveying pipe 7. When the stirring and mixing are completed, the mixed flocculant solution is discharged into the finished product tank 14 through the medicine delivery pipe 15, and the mixed flocculant solution can be conveyed to the chemical dosing point position of the sewage tank through the liquid outlet pipe 16. Preferably, since the driving current is large, forced air cooling or water cooling can be carried out on the pipeline coil when necessary; and a solenoid valve is provided on the medicine delivery pipe 15 to control the discharge of the flocculant solution; and a solenoid valve is provided on the first water inlet pipe 30 to control the water level height in the mixing tank.

[0031] Furthermore, a heating plate 17 is installed on the outer side wall of the feed hopper 12. The function of the heating plate 17 is to keep the feed hopper 12 at a constant temperature to ensure that the magnetic flocculant powder 2 falling on the feed hopper 12 is dry and does not cake.

[0032] Further, the stirring device includes a second motor 18 and stirring blades 20. A plurality of second motors 18 are provided on the top of the mixing tank 13. The output shaft of the second motor 18 passes through the inner top wall of the mixing tank 13 and is fixedly connected to a second transmission shaft 19. A plurality of stirring blades 20 are fixedly provided on the second transmission shaft 19 along the axis. By arranging a plurality of second motors 18, the liquid in the mixing tank 13 is stirred, reducing the stirring dead angle and improving the mixing efficiency. At the same time, the plurality of stirring blades 20 arranged on the second transmission shaft 19 can stir and mix the liquid at different heights, making the mixing more uniform.

[0033] Further, the stirring blade 20 is provided with perforations 21. When the stirring blade 20 rotates, the perforations 21 will generate more small-sized eddies, enhancing the shear force between fluids and accelerating the dispersion and mixing of the magnetic flocculant powder 2; the perforations 21 can guide the liquid to pass through the stirring blade 20, avoiding the flow stagnation area behind the traditional solid blade and making the mixing more uniform.

[0034] Further, a liquid level gauge 22 is provided on the finished product tank 14. The function of the liquid level gauge 22 is to detect the height of the liquid medicine in the finished product tank 14. When the height of the liquid medicine in the finished product tank 14 is too low, the liquid level gauge 22 sends a signal to the control system to open the solenoid valve 26 of the medicine delivery pipe 15, and put the mixed flocculant solution into the finished product tank 14, improving the automation degree of the device.

[0035] Further, a tubular magnetic concentrating ring 23 is provided outside the electromagnetic coil 8. There is a tubular magnetic concentrating ring 23 outside each short coil. When the A, B, and C phases are sequentially passed with currents having a pulse width of T, the magnetic concentrating ring 23 generates a directional magnetic field. Under the attraction of the magnetic field, the magnetic flocculant powder 2 moves synchronously along the pipeline from left to right with the magnetic field. Preferably, the magnetic concentrating ring 23 is made of ferrite.

[0036] Embodiment 2

[0037] Please refer to the attached Figures 1-6, the difference between this embodiment and Embodiment 1 is that it further includes a premixing bucket 24. The feed hopper 12 is fixedly arranged above the premixing bucket 24. The side wall of the premixing bucket 24 is provided with a second water inlet pipe 25. A conical surface 27 with a smaller upper part and a larger lower part is arranged in the premixing bucket 24. Both ends of the conical surface 27 are respectively communicated with the feed hopper 12 and the mixing tank 13. A plurality of water spraying holes 28 are arranged on the conical surface 27. A water adding cavity 29 is formed between the conical surface 27 and the inner wall of the premixing bucket 24. The second water inlet pipe 25 is communicated with the water adding cavity 29. Open the solenoid valve 26, and the magnetic flocculant powder 2 is conveyed into the feed hopper 12 through the chemical dosing conveyor located above the feed hopper 12. The outside of the premixing bucket 24 is barrel-shaped, and the internal conical surface 27 is an inverted conical structure with a smaller upper part and a larger lower part. The magnetic flocculant powder 2 enters the conical surface 27 channel through the feed hopper 12. The water flow into the second water inlet pipe 25 is controlled by the solenoid valve 26, and then enters the water adding cavity 29. The water in the water adding cavity 29 sprays out from the water spraying holes 28 on the conical surface 27, and is fully wetted and mixed with the magnetic flocculant powder 2 entering from above in advance, shortening the dissolution and preparation time in the preparation process and avoiding the caking of the powder. Preferably, a solenoid valve is arranged on the second water inlet pipe 25 to control the water volume in the water adding cavity and improve the premixing efficiency.

[0038] Further, the axis of the water spraying hole 28 and the axis of the premixing bucket 24 are at 45°. Twenty water spraying holes 28 with a diameter of 3 mm are evenly arranged on the inverted conical surface in the direction of 45°, forming an umbrella-shaped water distribution structure with a large coverage area and a good wetting and mixing effect with the magnetic flocculant powder 2 above, improving the premixing efficiency.

[0039] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A sewage treatment dosing device with adjustable dosage, characterized in that: It includes a medicine storage box, a medicine adding and conveying device and a liquid storage box, wherein magnetic flocculant powder is placed in the medicine storage box, a support rod is provided at the bottom of the medicine storage box, the support rod is fixedly connected to the top of the liquid storage box, a first motor is fixedly provided on the top of the medicine storage box, the output shaft of the first motor passes through the top wall of the medicine storage box and is fixedly connected to a first transmission shaft, a plurality of stirring rods are fixedly provided along the axis of the first transmission shaft, the medicine adding and conveying device includes a conveying pipeline, a plurality of sets of electromagnetic coils, a driver, a controller and a nozzle, the conveying pipeline is installed at the bottom of the medicine storage box, the conveying pipeline is connected to the medicine storage box, the electromagnetic coil is wound around the outer wall of the conveying pipeline, and the electromagnetic coil It is electrically connected to the driver, and the driver is electrically connected to the controller. Each group of the electromagnetic coils is divided into several short coil acceleration sections. From the powder inlet to the powder outlet of the conveying pipe, the length of each short coil increases successively. The outlet of the conveying pipe is connected to the nozzle. A feed hopper is installed on the top of the liquid storage tank. The nozzle blows toward the feed hopper. The feed hopper is connected to the liquid storage tank. The liquid storage tank is divided into an upper mixing box and a lower finished product box. A first water inlet pipe is provided on the side wall of the mixing box. A stirring device is installed in the mixing box. The mixing box is connected to the finished product box through a drug delivery tube. A liquid outlet pipe is provided on the side wall of the liquid storage tank.

2. A sewage treatment dosing device with adjustable dosage according to claim 1, characterized in that: A heating plate is installed on the outer side wall of the feed hopper.

3. A sewage treatment dosing device with adjustable dosage according to claim 1, characterized in that: The stirring device includes a second motor and stirring blades. A plurality of second motors are arranged on the top of the mixing box. The output shaft of the second motor passes through the top wall of the mixing box and is fixedly connected to a second transmission shaft. A plurality of stirring blades are fixedly arranged on the axis of the second transmission shaft.

4. A sewage treatment dosing device with adjustable dosage according to claim 3, characterized in that: The stirring blade is provided with a perforation.

5. The sewage treatment dosing device with adjustable dosage according to claim 1, characterized in that: The finished product box is provided with a liquid level meter.

6. A sewage treatment dosing device with adjustable dosage according to claim 1, characterized in that: A tubular magnetic field focusing ring is arranged outside the electromagnetic coil.

7. A sewage treatment dosing device with adjustable dosage according to claim 1, characterized in that: It also includes a premixing barrel, the feed hopper is fixed above the premixing barrel, the side wall of the premixing barrel is provided with a second water inlet pipe, the premixing barrel is provided with a conical surface with a small upper part and a large lower part, the two ends of the conical surface are respectively connected with the feed hopper and the mixing box, a plurality of water spray holes are provided on the conical surface, the conical surface and the inner wall of the premixing barrel form a water adding cavity, and the second water inlet pipe is connected with the water adding cavity.

8. A sewage treatment dosing device with adjustable dosage according to claim 7, characterized in that: The angle between the axis of the water spray hole and the axis of the premixing barrel is 45 degrees.

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