Coagulant adding device for wastewater treatment

Abstract

The utility model discloses a coagulant feeding device for wastewater treatment, which relates to the technical field of wastewater treatment and comprises a fixed seat and a reaction tank arranged on one side of the fixed seat, the top of the fixed seat is connected with a storage tank, and a rotating shaft is arranged in the storage tank. The first scraper, the guide scraper and the second scraper are driven by the rotary drum to rotate, and the problems that due to changes of conditions such as temperature and concentration, a coagulant can be crystallized or precipitated in the storage tank, dirt can be attached to the inner wall of the storage tank, and follow-up cleaning is inconvenient are solved. The labor intensity of operators can be improved and reduced; the stirring blades are driven by the rotating shaft to rotate to stir a coagulant in the storage tank, so that the problem that the concentration uniformity of the added coagulant is inconsistent when the coagulant adding device is used due to precipitation and layering phenomena of the coagulant in the storage tank is solved, and the working quality of the coagulant adding device is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a coagulant dosing device for wastewater treatment. Background Technology

[0002] Wastewater treatment coagulant dosing device is a device used to add coagulant to wastewater to achieve wastewater purification. At present, liquid coagulant is mainly used because it can be added directly, which simplifies the operation process, shortens the dissolution time, and is more suitable for automated dosing systems.

[0003] 1. Currently, coagulants in storage tanks may crystallize or precipitate due to changes in temperature, concentration, and other conditions. The solubility of coagulants decreases at low temperatures, making them prone to crystallization and adhering to the inner wall of the storage tank. The presence of these contaminants affects the concentration and composition of the coagulants, leading to unstable performance. Furthermore, manual cleaning is inconvenient and results in high labor intensity for operators.

[0004] 2. After the coagulant in the storage tank has been left to stand for a long time, the tiny particles in the coagulant solution will gradually sink under the action of gravity and precipitate. Moreover, as time goes by, hydrolysis, polymerization and other reactions continue to occur, and the reaction products accumulate, which will aggravate the precipitation and stratification. This will result in inconsistent concentration of coagulant added by the coagulant dosing device during use, leading to poor working quality. Utility Model Content

[0005] To address the above problems, this utility model provides a coagulant dosing device for wastewater treatment, which solves the aforementioned issues.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coagulant dosing device for wastewater treatment, comprising a fixed base and a reaction tank disposed on one side of the fixed base, wherein a storage tank is connected to the top of the fixed base, a rotating shaft is provided inside the storage tank, and an agitator is fixedly connected to the outside of the rotating shaft;

[0007] The storage tank is internally connected to a rotating cylinder, the upper end of the rotating shaft is located inside the rotating cylinder, a driven gear is externally connected to the rotating cylinder, a support rod is fixedly connected to the outside of the rotating cylinder, and a first scraper is connected to the outside of the rotating cylinder and one side of the support rod.

[0008] Two guide scrapers are fixedly connected to the lower end of the first scraper. The guide scrapers are inclined at an angle to the first scraper. A connecting frame is connected to one side of the two guide scrapers, and a second scraper is connected to the bottom of the connecting frame.

[0009] Preferably, a fixing frame is connected to the top of the fixing base, and a first motor is connected to the top of the fixing frame. The output end of the first motor is connected to the top of the rotating shaft for transmission.

[0010] Preferably, a second motor is connected to the top of the fixing frame, and a round rod is driven to the output end of the second motor. The outside of the round rod is rotatably connected to the inside of the fixing frame, and a driving gear is connected to the outside of the round rod. The driving gear and the driven gear mesh with each other.

[0011] Preferably, a discharge pipe is connected to one side of the storage tank, a delivery pipe is connected to the other side of the storage tank, and a pressure gauge is connected to one side of the delivery pipe.

[0012] Preferably, a controller is connected to one side of the fixing frame, and several positioning plates are connected to one side of the fixing frame, with the interior of the positioning plates connected to the exterior of the conveying pipe.

[0013] Preferably, a metering pump is connected to the top of one of the positioning plates, and one side of the metering pump is connected to a delivery pipe.

[0014] Preferably, one end of the conveying pipe is connected to a dosing pipe, and the bottom of the dosing pipe is connected to a plurality of nozzles, all of which are positioned above the reaction tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This application uses a rotating drum to drive the first scraper, the guide scraper, and the second scraper to rotate. When cleaning the storage tank, it can thoroughly clean the inner wall, the inner top surface, and the inner bottom surface of the storage tank. This solves the problem that the coagulant in the storage tank will crystallize or precipitate due to changes in temperature, concentration, and other conditions. These dirt will adhere to the inner wall of the storage tank, making subsequent cleaning inconvenient. This is beneficial to improving and reducing the labor intensity of operators.

[0017] 2. This application uses a guide scraper in conjunction with a connecting frame and a scraper to guide and discharge the cleaned dirt and wastewater, and ensures that the inner wall of the storage tank is thoroughly scraped. This solves the problem that incomplete removal of dirt during the cleaning of the storage tank affects the normal use of the subsequent coagulant dosing device, and is conducive to improving the practical performance of the coagulant dosing device.

[0018] 3. This application uses a rotating shaft to drive the stirring blades to agitate the coagulant in the storage tank, which solves the problem of sedimentation and stratification of the coagulant in the storage tank, resulting in inconsistent concentration uniformity of the coagulant added by the coagulant dosing device during use, and is conducive to improving the working quality of the coagulant dosing device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0021] Figure 3 This is a partial cross-sectional view of the present invention.

[0022] Figure 4 This is a first cross-sectional view of the storage tank of this utility model;

[0023] Figure 5 This is a second cross-sectional view of the storage tank of this utility model.

[0024] The diagram shows the following components: 1. Fixed base; 2. Reaction tank; 3. Storage tank; 4. First motor; 5. Rotating shaft; 6. Stirring blade; 7. Rotary drum; 8. Support rod; 9. First scraper; 10. Guide scraper; 11. Connecting frame; 12. Second scraper; 13. Driven gear; 14. Driving gear; 15. Round rod; 16. Second motor; 17. Discharge pipe; 18. Delivery pipe; 19. Fixed frame; 20. Pressure gauge; 21. Dosing pipe; 22. Nozzle; 23. Controller; 24. Positioning plate; 25. Metering pump. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0026] Please see Figures 1 to 5 A coagulant dosing device for wastewater treatment includes a fixed base 1 and a reaction tank 2 disposed on one side of the fixed base 1. The reaction tank 2 contains wastewater to be treated. The reaction tank 2 has corresponding outlets to ensure its normal operation. This application focuses on the coagulant dosing device, so the reaction tank 2 will not be described in detail. Those skilled in the art will understand its specific function and structure. A storage tank 3 is connected to the top of the fixed base 1. The top of the storage tank 3 has two covers. When adding coagulant, personnel need to climb a staircase. Then, the top cover is opened and the coagulant is injected into the storage tank 3 through other equipment. The top cover is then closed again to seal the storage tank 3. It should be noted that the coagulant is harmful to the human body, so personnel need to take protective measures when working. The storage tank 3 is equipped with a rotating shaft 5 inside, and an agitator 6 is fixedly connected to the outside of the rotating shaft 5. When the coagulant enters the storage tank 3, the output end of the first motor 4 drives the rotating shaft 5 to rotate, so that the rotating shaft 5 drives the agitator 6 to rotate inside the storage tank 3, thereby agitating the coagulant.

[0027] It should be noted that the speed of the rotating shaft 5 driving the stirring blade 6 during the stirring process should not be too fast. Too fast stirring may damage the molecular structure of the coagulant, affecting its hydrolysis and polymerization reaction, thereby reducing the performance of the coagulant. In addition, the long chain structure of some polymeric coagulants may be broken due to high-speed stirring, resulting in poorer coagulation effect.

[0028] The storage tank 3 is internally connected to a rotating drum 7. The upper end of the rotating shaft 5 is located inside the rotating drum 7. The rotating drum 7 is externally connected to a driven gear 13. A support rod 8 is fixedly connected to the outside of the rotating drum 7. A first scraper 9 is connected to the outside of the rotating drum 7 and one side of the support rod 8. When it is necessary to clean the inside of the storage tank 3, the personnel open the top cover and add cleaning water into the storage tank 3. Then, when the driving gear 14 drives the driven gear 13 to rotate, the driven gear 13 will drive the rotating drum 7 to rotate. The rotating drum 7 will drive the support rod 8 and the first scraper 9 to rotate. It should be further noted that the support rod 8 also drives the first scraper 9 to rotate. The main purpose of the support rod 8 is to improve the stability of the rotating drum 7 driving the first scraper 9 to rotate.

[0029] When the first scraper 9 rotates, it cleans the inner wall and top surface of the storage tank 3. At the same time, when the first scraper 9 rotates, it drives the two guide scrapers 10 and drives the second scraper 12 to rotate through the connecting frame 11 to scrape the bottom surface of the storage tank 3.

[0030] It is important to note that because the guide scraper 10 and the first scraper 9 are inclined, and the rotating drum 7 rotates counterclockwise, the guide scraper 10 will guide the dirt at the bottom to the outer ring of the inner bottom surface of the storage tank 3 during rotation. In this way, when the guide scraper 10 rotates to the discharge pipe 17, the dirt will be discharged more easily through the discharge pipe 17 and the wastewater, avoiding the problem that the dirt is not easy to be discharged through the discharge pipe 17 due to the lack of measures to guide the dirt.

[0031] It should also be noted that both the discharge pipe 17 and the delivery pipe 18 are equipped with one-way valves. The opening and closing of the discharge pipe 17 and the delivery pipe 18 are controlled by controlling the opening and closing of the one-way valves. During normal use, the discharge pipe 17 is closed and the delivery pipe 18 is open, so that the coagulant can be delivered through the delivery pipe 18. When cleaning the storage tank 3, the delivery pipe 18 is closed and the discharge pipe 17 is closed. After a period of cleaning work, the delivery pipe 18 remains closed and the discharge pipe 17 is open, so that wastewater and dirt can be discharged through the discharge pipe 17.

[0032] Two guide scrapers 10 are fixedly connected to the lower end of the first scraper 9. The guide scrapers 10 are inclined to the first scraper 9. A connecting frame 11 is connected to one side of the two guide scrapers 10. A second scraper 12 is connected to the bottom of the connecting frame 11. When cleaning the storage tank 3, the first scraper 9 drives the guide scrapers 10 to rotate, and the second scraper 12 is driven to rotate through the connecting frame 11. Because the two guide scrapers 10 are set at an inclined angle, there will be certain cleaning dead corners on the inner bottom surface of the storage tank 3 during operation. The dirt attached to this area cannot be scraped off. Therefore, the connecting frame 11 and the second scraper 12 are used to fill this area, so that the dirt inside the storage tank 3 can be cleaned in an all-round way.

[0033] It should be noted that, in order to prevent dirt from accumulating between the connecting frame 11 and the guide scraper 10, the connecting frame 11 is hollow, so that dirt will not accumulate between the connecting frame 11 and the guide scraper 10, but will flow through the hollow part of the connecting frame 11, thereby preventing the dirt from being cleaned incompletely.

[0034] The top of the fixed base 1 is connected to the fixed frame 19, the top of the fixed frame 19 is connected to the first motor 4, and the output end of the first motor 4 is connected to the top of the rotating shaft 5 for transmission.

[0035] A second motor 16 is connected to the top of the fixed frame 19. The output end of the second motor 16 is connected to a round rod 15. The outside of the round rod 15 is rotatably connected to the inside of the fixed frame 19. A drive gear 14 is connected to the outside of the round rod 15. The drive gear 14 and the driven gear 13 mesh with each other. The output end of the second motor 16 drives the round rod 15 to rotate inside the fixed frame 19, so that the round rod 15 drives the drive gear 14 to rotate. At this time, the drive gear 14 drives the driven gear 13 to rotate synchronously.

[0036] A discharge pipe 17 is connected to one side of the storage tank 3, and a delivery pipe 18 is connected to the other side of the storage tank 3. A pressure gauge 20 is connected to one side of the delivery pipe 18.

[0037] A controller 23 is connected to one side of the fixed frame 19, and several positioning plates 24 are connected to one side of the fixed frame 19. The interior of the positioning plates 24 is connected to the exterior of the conveying pipe 18.

[0038] One of the positioning plates 24 is connected to a metering pump 25 on its top. One side of the metering pump 25 is connected to the delivery pipe 18. When the coagulant dosing device is working, the metering pump 25 delivers the coagulant from the storage tank 3 to the dosing pipe 21 through the delivery pipe 18, and sprays the coagulant into the reaction tank 2 through the nozzle 22, so that the coagulant reacts with the wastewater to treat the wastewater. The colloidal particles in the wastewater usually carry a negative charge. The positively charged ions or polynuclear hydroxyl complexes produced by the hydrolysis of the coagulant neutralize the negative charge on the surface of the colloidal particles through double-layer compression, adsorption, and charge neutralization, thereby reducing the electrostatic repulsion between the colloidal particles, causing them to move closer together and coagulate. The coagulant is broken down into smaller particles, and the high molecular polymers or long-chain substances produced by the hydrolysis of the coagulant connect the small particles together through adsorption bridging to form larger flocs. These flocs have a large surface area and adsorption capacity, which can adsorb suspended particles, organic matter, heavy metal ions and other pollutants in wastewater, and separate them from the water. As the flocs continue to grow, their gravity exceeds the buoyancy of the water, and the flocs begin to settle to the bottom of the water, achieving solid-liquid separation. For some flocs that are difficult to settle, coagulant aids can be added or methods such as air flotation and filtration can be used to promote the separation of flocs from water, thereby achieving the purpose of purifying wastewater.

[0039] The metering pump 25 can accurately add coagulant to the wastewater according to the set flow rate and pressure, ensuring that the amount of coagulant added matches the amount of wastewater treated. The pressure gauge 20 is used to monitor the pressure in the pipeline, which facilitates monitoring the operating status of the coagulant dosing device and determining whether the pipeline is blocked or whether the dosing is normal. The pressure gauge 20 and the metering pump 25 are known technologies, and those skilled in the art can and should understand their specific functions and structures, so they will not be described in detail here.

[0040] One end of the delivery pipe 18 is connected to the dosing pipe 21, and the bottom of the dosing pipe 21 is connected to several nozzles 22, which are all located above the reaction tank 2.

[0041] When using this utility model:

[0042] First, wastewater to be treated is added to reaction tank 2. The top of storage tank 3 is equipped with two top covers. When adding coagulant, personnel need to climb the stairs to reach the top, then open the top cover and inject the coagulant into storage tank 3 through other equipment. Then, the top cover is closed again to seal storage tank 3.

[0043] Secondly, when the coagulant enters the storage tank 3, the output end of the first motor 4 drives the rotating shaft 5 to rotate, so that the rotating shaft 5 drives the stirring blade 6 to rotate inside the storage tank 3, thereby agitating the coagulant. It should be noted that the speed of the rotating shaft 5 driving the stirring blade 6 during the agitation process should not be too fast. Too fast agitation may damage the molecular structure of the coagulant, affect its hydrolysis and polymerization reaction, and thus reduce the performance of the coagulant.

[0044] Then, the metering pump 25 delivers the coagulant in the storage tank 3 to the dosing pipe 21 through the delivery pipe 18, and sprays the coagulant into the reaction tank 2 through the nozzle 22, so that the coagulant reacts with the wastewater to treat the wastewater. When it is necessary to clean the inside of the storage tank 3, the personnel open the top cover and add cleaning water into the inside of the storage tank 3. Then, when the drive gear 14 drives the driven gear 13 to rotate, the driven gear 13 will drive the rotating drum 7 to rotate, and the rotating drum 7 will drive the support rod 8 and the first scraper 9 to rotate.

[0045] Finally, the first scraper 9 cleans the inner wall and top surface of the storage tank 3 as it rotates. At the same time, the first scraper 9 drives the two guide scrapers 10 and the second scraper 12 to rotate through the connecting frame 11 to scrape the bottom surface of the storage tank 3. Both the discharge pipe 17 and the delivery pipe 18 are equipped with one-way valves. The opening and closing of the discharge pipe 17 and the delivery pipe 18 are controlled by controlling the opening and closing of the one-way valves. During normal use, the discharge pipe 17 is closed and the delivery pipe 18 is open, so that the coagulant can be delivered through the delivery pipe 18. When cleaning the storage tank 3, the delivery pipe 18 is closed and the discharge pipe 17 is closed. After a period of cleaning, the delivery pipe 18 remains closed and the discharge pipe 17 is open, so that wastewater and dirt can be discharged through the discharge pipe 17.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coagulant dosing device for wastewater treatment, comprising a fixed base (1) and a reaction tank (2) disposed on one side of the fixed base (1), characterized in that: The top of the fixed base (1) is connected to a storage tank (3), the inside of the storage tank (3) is provided with a rotating shaft (5), and the outside of the rotating shaft (5) is fixedly connected with an agitator (6). The storage tank (3) is connected to a rotating cylinder (7) inside. The upper end of the rotating shaft (5) is located inside the rotating cylinder (7). The rotating cylinder (7) is connected to a driven gear (13) outside. The rotating cylinder (7) is fixedly connected to a support rod (8) outside. The rotating cylinder (7) and one side of the support rod (8) are connected to a first scraper (9). Two guide scrapers (10) are fixedly connected to the lower end of the first scraper (9). The guide scrapers (10) are inclined at an angle to the first scraper (9). A connecting frame (11) is connected to one side of the two guide scrapers (10), and a second scraper (12) is connected to the bottom of the connecting frame (11).

2. The coagulant dosing device for wastewater treatment according to claim 1, characterized in that: The top of the fixed base (1) is connected to a fixed frame (19), and the top of the fixed frame (19) is connected to a first motor (4). The output end of the first motor (4) is connected to the top of the rotating shaft (5) for transmission.

3. The coagulant dosing device for wastewater treatment according to claim 2, characterized in that: The top of the fixed frame (19) is connected to a second motor (16), and the output end of the second motor (16) is connected to a round rod (15). The outside of the round rod (15) is rotatably connected to the inside of the fixed frame (19). The outside of the round rod (15) is connected to a driving gear (14), and the driving gear (14) meshes with the driven gear (13).

4. The coagulant dosing device for wastewater treatment according to claim 1, characterized in that: A discharge pipe (17) is connected to one side of the storage tank (3), and a delivery pipe (18) is connected to the other side of the storage tank (3). A pressure gauge (20) is connected to one side of the delivery pipe (18).

5. The coagulant dosing device for wastewater treatment according to claim 2, characterized in that: A controller (23) is connected to one side of the fixed frame (19), and several positioning plates (24) are connected to one side of the fixed frame (19). The interior of the positioning plate (24) is connected to the exterior of the conveying pipe (18).

6. The coagulant dosing device for wastewater treatment according to claim 5, characterized in that: One of the positioning plates (24) is connected to a metering pump (25) on its top, and one side of the metering pump (25) is connected to a delivery pipe (18).

7. The coagulant dosing device for wastewater treatment according to claim 6, characterized in that: One end of the delivery pipe (18) is connected to the dosing pipe (21), and the bottom of the dosing pipe (21) is connected to several nozzles (22), which are all located above the reaction tank (2).

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