An automatic dosing control device for industrial wastewater treatment

Abstract

The application relates to the technical field of wastewater treatment, in particular to an automatic dosing control device for industrial wastewater treatment, which comprises a tank body, a tank cover, a motor, a dosing pipe, a pH meter, a filter plate, an agitation assembly and an adjusting assembly; the motor and the dosing pipe are arranged on the tank cover; the pH meter is arranged in the tank body; when the pH meter detects the pH value change of wastewater, the dosing pipe is controlled to add reagents; the filter plate is arranged in the tank body; the agitation assembly penetrates through the filter plate and is connected with the dosing pipe. The agitation assembly and the adjusting assembly can filter the precipitates formed in the wastewater softening process in a pressure filtration mode, and the filter plate is reset after the filtration is completed; air is used to extrude from the top of the filter plate during the resetting process, so that part of the precipitates adhered to the bottom of the filter plate are removed, and the continuous and stable operation of the desulfurization wastewater zero discharge process is ensured.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an automated dosing control device for industrial wastewater treatment. Background Technology

[0002] Industrial wastewater refers to wastewater and waste liquid generated during industrial production processes, especially desulfurization wastewater, which contains high concentrations of salts and heavy metal ions. Direct discharge of industrial wastewater can severely impact the ecological environment. Therefore, zero-discharge treatment processes for desulfurization wastewater are particularly important in the research and development of environmental protection technologies. Pretreatment methods for desulfurization wastewater include conventional pretreatment and advanced pretreatment. Advanced pretreatment includes removing suspended solids and softening the water.

[0003] Water softening methods typically include chemical precipitation, ion exchange, and membrane methods. Among these, chemical precipitation is widely used in the softening of desulfurization wastewater due to its lower cost. Chemical precipitation involves adding appropriate reagents (such as calcium hydroxide and sodium carbonate solutions) to the desulfurization wastewater via a dosing device. Through a chemical reaction, calcium and magnesium ions in the wastewater are displaced, forming precipitates that are then removed, thus softening the water. However, traditional dosing devices typically add reagents directly to the desulfurization wastewater, resulting in concentrated reagents that cannot be evenly mixed with the wastewater, affecting the softening effect. This leads to calcium and magnesium ions in the wastewater precipitating and adhering to the surfaces of pipes, valves, nozzles, and other equipment during subsequent concentration, reduction, and evaporation crystallization processes, thus impacting the continuous and stable operation of the zero-discharge desulfurization wastewater process. To address the aforementioned issues, existing technologies offer relatively good solutions. For example, CN119330515B discloses a device and method for removing hardness from industrial wastewater. This device, through a lead screw, rotating frame, and stirring blades, can agitate the tank in multiple directions during operation, achieving sufficient contact between the industrial wastewater and the reagents. This effectively shortens the settling time of calcium and magnesium ions, thus ensuring the continuous and stable operation of the zero-discharge desulfurization wastewater process. However, the following drawbacks remain: When the softened wastewater is discharged, a filter screen is used to separate the precipitate from the clear water. However, during filtration, some precipitate becomes clogged in the filter screen and cannot be discharged. Furthermore, the continuous stirring of the wastewater during softening causes the precipitate to collide and break down into fine particles. Over time, this can lead to severe clogging of the filter screen, affecting the filtration speed of subsequent solutions. Although replacing the filter screen can ensure the normal operation of the filtration process, it renders the entire filtration device unusable during screen replacement, still impacting the continuous and stable operation of the zero-discharge desulfurization wastewater process.

[0004] Therefore, in order to solve the problem that the continuous collision and crushing of the above-mentioned precipitates during the stirring process will seriously clog the filter screen and affect the continuous and stable operation of the zero-discharge process of desulfurization wastewater, an automated dosing control device for industrial wastewater treatment is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an automated dosing control device for industrial wastewater treatment, solving the problem that continuous collision and breakage of precipitates can severely clog the filter screen, affecting the continuous and stable operation of the zero-discharge process for desulfurization wastewater. By incorporating a pH meter, agitation components, and adjustment components, the pH value of the desulfurization wastewater during softening can be detected inside the tank. While controlling the dosage of chemicals to ensure softening effect, the agitation device disperses the chemicals inside the tank and simultaneously gathers calcium and magnesium ion precipitates, preventing precipitate breakage and clogging of the filter plate. After softening, the wastewater can be pressure-filtered by lowering the filter plate, achieving separation of precipitates from clean water. During the process of pumping clean water and re-injecting the wastewater to be softened, the resetting movement of the filter plate transports some air from outside the tank to above the liquid level inside the tank. When the filter plate is above the liquid level, air pressure removes some precipitates from the bottom of the filter plate, preventing severe clogging and ensuring the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automated dosing control device for industrial wastewater treatment includes a tank and a tank cover. The tank is equipped with an inlet pipe for conveying filtered, desulfurized wastewater into the tank. The tank cover is equipped with a suction pipe, a stainless steel flexible hose, for extracting softened and filtered water. The device also includes a motor, a dosing pipe, a pH meter, a filter plate, an agitator, and a regulating component. The motor and dosing pipe are both located on the tank cover. The pH meter is located inside the tank. When the pH meter detects a change in the pH value of the wastewater, it controls the dosing pipe to add chemicals. This pH meter is an industrial submersible pH meter, capable of being installed inside the tank for extended periods to monitor the pH value of the liquid inside the tank. The pH meter is connected to an external controller. An external controller automatically adds an appropriate amount of chemicals through the dosing pipe to maintain the pH value of the desulfurization wastewater inside the tank between 10 and 10.5, thereby ensuring the water softening effect. The filter plate is set inside the tank, and the agitator is set through the filter plate and connected to the dosing pipe. When the motor is working, it drives the agitator to rotate the wastewater. When the wastewater rotates, it drives the sediment from top to bottom from the edge of the tank to the center and throws the chemicals into the tank. The regulating component is set through the tank cover and connected to the filter plate. When the regulating component is powered on, it drives the filter plate to move down, presses the clean water to the top of the filter plate, and allows outside air to enter the regulating component. When the regulating component resets, it transports the air inside its own body into the tank and squeezes the filter plate from top to bottom.

[0008] Preferably, the agitation assembly includes a guide, a hollow column, a limiting strip, and a stirring blade. The guide is disposed at the output end of the motor. The hollow column is coaxially sleeved on the rod wall of the guide and has a limiting groove at its end. The limiting strip is disposed on the guide rod and slidably disposed inside the limiting groove. Multiple stirring blades are disposed and arranged circumferentially on the surface of the hollow column. A guiding groove is formed on the surface of the stirring blade. The openings of the stirring blade and the guiding groove are both arranged in a shape that is larger at the top and smaller at the bottom. The stirring blade is inclined, and the guiding groove is oriented towards the rotation direction of the guide.

[0009] It is known that there are many ways to accelerate the reaction between reagents and wastewater to achieve calcium and magnesium ion precipitation. A common method is to use stirring to speed up the mixing of reagents and wastewater, thereby accelerating the precipitation process. However, considering that in practice, prematurely formed calcium and magnesium ions may re-drift and break up inside the tank during stirring, limiting the aggregation effect on the precipitate, and the small size of the broken precipitate particles can easily clog the filter plates and affect the normal operation of the device, this solution is adopted. Through the design of guide components, hollow columns, and limiting strips, the stirring blades are driven to rotate during the rotation of the guide components by the motor. During the rotation of the stirring blades, the wastewater in the upper part of the tank is stirred. The guide groove guides the formed calcium and magnesium ion precipitate during stirring, causing the precipitate to converge towards the bottom of the tank and from the edge to the center. This avoids the precipitate redispersing and breaking up during stirring due to the large size of the stirring blades. While ensuring the softening effect of the water, this prevents the precipitate from breaking up and clogging the filter plates, effectively ensuring the continuous and stable operation of the zero-discharge desulfurization wastewater process.

[0010] Preferably, the guide includes a rotating rod, a U-shaped rod, a sleeve, a hollow column, and a one-way valve. The upper end of the rotating rod passes through the tank cover and is connected to the output end of the motor. The sleeve is located below the rotating rod and connected to the rotating rod via the U-shaped rod. The limiting strip is located on the surface of the sleeve. The hollow column is coaxially rotatably sleeved on the rotating rod and the sleeve. Two dosing tubes are provided and symmetrically pass through the hollow column. The upper end of the dosing tube extends to the outside of the tank cover. The sleeve has a liquid outlet. The stirring blade has a groove communicating with the liquid outlet. The one-way valve is located on the stirring blade and communicates with the groove. Multiple one-way valves are provided. The distance between the multiple one-way valves and the hollow column decreases from top to bottom, and the diameter of the multiple one-way valves increases from top to bottom.

[0011] By adopting the above scheme, the added reagent can be transported to the center of the tank, and the reagent is thrown into the wastewater as the stirring blades rotate. The reagent is dispersed by the stirring blades upon entering the wastewater and gradually distributed inside the tank, achieving effective adsorption and sedimentation of irregularly distributed calcium and magnesium ions in the wastewater. Furthermore, when a small amount of reagent is added at one time, the reagent can enter the wastewater through the bottom one-way valve and gradually diffuse outwards. When a large amount of reagent is added at one time, a small amount can enter the wastewater through the corresponding one-way valve at the top, reducing the amount of reagent directly distributed at the inner edge of the tank. This ensures effective sedimentation of calcium and magnesium ions in the wastewater near the tank axis. While accelerating the sedimentation rate of calcium and magnesium ions in the wastewater, it also allows the precipitate to accumulate at the bottom of the tank without contacting the filter plate, avoiding severe clogging of the filter plate by the precipitate and ensuring the continuous and stable operation of the zero-discharge desulfurization wastewater process.

[0012] Preferably, the adjusting assembly includes a second sleeve, a U-shaped tube, a piston ring, a second one-way valve, and a third one-way valve. The second sleeve is fitted outside the tank body, and the piston ring is located inside the second sleeve and connected to the tank body. A rubber sleeve can be inserted at the connection point to ensure airtightness. The two ends of the U-shaped tube pass through the tank cover and the second sleeve, and are respectively connected to the filter plate and the piston ring. The U-shaped tube and the piston ring are detachably connected to facilitate replacement when the piston ring ages due to long-term use. The second one-way valve is located inside the tank body and connected to the U-shaped tube. The third one-way valve is located inside the second sleeve and connected to the piston ring. An air port is opened on the tube wall at one end of the U-shaped tube located inside the second sleeve.

[0013] It is known that filtration is the usual method for removing sediment from softened desulfurization wastewater. However, conventional filtration methods can cause sediment to accumulate on the surface of the filter plates after filtration, clogging them and affecting their normal use. Although two identical filtration devices can be installed, with one device working while the other's filter plates are cleaned by reverse high-pressure rinsing, prolonged use of a single filtration device can lead to severe clogging of the filter plates by sediment. The backwashing process requires a large amount of water, resulting in significant water waste and damage to the filter plates, thus affecting their lifespan and limiting the continuous and stable operation of the zero-discharge desulfurization wastewater process. Therefore, this solution is adopted. Through the U-shaped pipe, piston ring, one-way valve two, and one-way valve three, after the wastewater inside the tank is softened, the U-shaped pipe is driven by an external power source to move the filter plate downwards, pressing the softened clean water to the top of the filter plate, while the sediment remains at the bottom of the filter plate. This effectively prevents sediment from accumulating on the surface of the filter plate while filtering the sediment. For the small amount of sediment that accumulates at the bottom of the filter plate, it can be removed by air pressure during the filter plate reset process. The automatic cleaning of the filter plate ensures its normal use, thereby guaranteeing the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0014] Preferably, the filter plate includes a core plate, an annular plate, and mounting brackets. The annular plate is disposed inside the tank, the core plate is disposed inside the annular plate, and two mounting brackets are provided and symmetrically disposed on both sides of the core plate. The mounting bracket located on the upper side is detachably connected to the annular plate, the mounting bracket located on the lower side is fixedly connected to the annular plate, and the upper mounting bracket is connected to the end of the U-shaped tube. The hollow column is disposed through both mounting brackets, and the bottom inner wall of the annular plate is conical.

[0015] By adopting the above scheme, on the basis of stable installation of the core plate, the core plate can be smoothly moved down when the U-shaped rod moves down. This achieves pressure filtration of softened wastewater and effectively cleans the sediments attached to the inner wall of the tank by using the conical surface at the bottom of the annular plate, thereby effectively filtering out the sediments.

[0016] Preferably, the tank body includes an upper section, a lower section, and a discharge valve. The tank cover is located at the top of the upper section, the lower section is located at the bottom of the upper section, the inner diameter of the upper port of the lower section is smaller than the inner diameter of the middle part of the upper section, the middle part of the lower section is arranged in an outwardly expanding arc shape, and the discharge valve is located at the bottom of the lower section.

[0017] By adopting the above scheme, when the reagent enters the tank and reacts chemically with the wastewater to be softened to form calcium and magnesium ion precipitates, they can fall into the lower section. During the continuous rotation of the wastewater, the middle part of the outward-expanding and arc-shaped lower section can be used to collect and block the precipitates, preventing them from spiraling upwards into the upper section and re-diffused and broken up due to the continuous rotation of the wastewater. This avoids deep clogging of the filter plate due to the small particle size of the precipitates, and further ensures the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0018] Preferably, the sleeve, the limiting strip and the hollow column are slidably fitted together, as are the annular plate and the inner wall of the tank.

[0019] By adopting the above scheme, while realizing the movable connection between the hollow column and the sleeve, the sealing of the connection between the two is ensured. This allows the agent entering the sleeve to smoothly enter the groove from the outlet when the piston ring is in the uppermost position, and then smoothly flow into the tank through the corresponding one-way valve to mix with the desulfurization wastewater to be softened. During the up-and-down movement of the filter plate, the sealing between the annular plate and the inner wall of the tank is ensured, preventing the sediment from moving to the top of the filter plate and causing blockage on the upper surface of the filter plate. This ensures the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By using a pH meter and two dosing pipes, the pH value of the desulfurization wastewater can be monitored in real time during the chemical precipitation process. The measured values ​​are fed back to an external controller, which automatically adds an appropriate amount of reagent through the two dosing pipes to maintain the pH value of the desulfurization wastewater between 10 and 10.5, thus ensuring the softening effect of the wastewater. The agitator and regulating components, along with the filter plate positioned above the liquid surface, allow the wastewater to be softened to be agitated during reagent addition, preventing direct contact between the filter plate and the wastewater. This avoids direct adhesion of sediment to the filter plate surface. After softening, the downward movement of the agitator causes the filter plate to move downwards synchronously. The filtered water is discharged through a pump pipe above the filter plate, while the sediment accumulates below the filter plate and is discharged through a discharge valve, preventing filter plate blockage. Once the regulating component resets the filter plate, the entire filtration device can be put into operation, effectively ensuring the continuous and stable operation of the zero-discharge desulfurization wastewater process.

[0022] 2. The agitation component allows for top-level stirring of the wastewater during reagent addition. Furthermore, the guide grooves on the agitator surface help to gather calcium and magnesium ion precipitates formed during the softening process, moving them from the edge of the tank towards the center and gradually converging at the bottom. This reduces impact between the precipitates and the agitator, preventing breakage and the formation of finer particles. This avoids clogging the filter plates during wastewater filtration by preventing fine precipitate particles from entering the filter plates, thus ensuring continuous and stable operation of the zero-discharge desulfurization wastewater process.

[0023] 3. Through the set adjustment components, during the process of driving the filter plate to move down to filter the softened wastewater, a portion of the air is stored using piston rings and one-way valve three. After the filter plate is pressed, when the U-shaped tube is driven by an external power source to move the filter plate up, the stored air is transported into the tank through the U-shaped tube and one-way valve two. This increases the air content in the space inside the tank as the liquid level rises and the space above the tank is reduced. When the height of the filter plate is higher than the liquid level, the air pressure removes some of the sediment accumulated at the bottom of the filter plate, ensuring the normal use of the filter plate and further ensuring the continuous and stable operation of the zero-discharge process for desulfurization wastewater. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the connection structure between the tank cover, filter plate, and agitator assembly;

[0026] Figure 3 For the present invention Figure 2 Schematic diagram of the connection structure between the guide component, filter plate, and stirring blades;

[0027] Figure 4 For the present invention Figure 1 Schematic diagram of the connection structure between the middle filter plate, the agitation component, and the adjustment component;

[0028] Figure 5 For the present invention Figure 3 Exploded view of the middle filter plate;

[0029] Figure 6 For the present invention Figure 1 A diagram showing the state of the stirring blades as they move downwards;

[0030] Figure 7 For the present invention Figure 6 A magnified view of part A in the middle section;

[0031] Figure 8 For the present invention Figure 1 A diagram showing the state when the stirring blades are fully positioned in the lower section.

[0032] In the diagram: 1. Tank body; 11. Inlet pipe; 12. Upper section; 13. Lower section; 14. Discharge valve; 2. Tank cover; 21. Pumping pipe; 3. Motor; 4. Dosing pipe; 5. pH meter; 6. Filter plate; 61. Core plate; 62. Annular plate; 63. Mounting bracket; 7. Agitator assembly; 71. Guide component; 711. Rotating rod; 712. U-shaped rod; 713. Sleeve one; 7131. Liquid outlet; 714. Hollow column two; 715. One-way valve one; 72. Limiting strip; 73. Hollow column one; 731. Limiting groove; 74. Agitator blade; 741. Guide groove; 742. Groove; 8. Adjustment assembly; 81. Sleeve two; 82. U-shaped pipe; 821. Air port; 83. Piston ring; 84. One-way valve two; 85. One-way valve three. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 8 This invention provides an automated dosing control device for industrial wastewater treatment, the technical solution of which is as follows:

[0035] For details, please refer to Figure 1 , Figure 6 and Figure 8 An automated dosing control device for industrial wastewater treatment includes a tank body 1 and a tank cover 2. The tank body 1 includes an upper section 12, a lower section 13, and a discharge valve 14. The tank cover 2 is located at the top of the upper section 12, and the lower section 13 is located at the bottom of the upper section 12. The inner diameter of the upper port of the lower section 13 is smaller than the inner diameter of the middle part of the upper section 12. The middle part of the lower section 13 is arranged in an outwardly expanding arc shape. The discharge valve 14 is located at the bottom of the lower section 13. When the reagent enters the tank body 1 and reacts chemically with the wastewater to be softened to form calcium and magnesium ion precipitates, the precipitates can fall into the interior of the lower section 13. During the continuous rotation of the wastewater, the precipitates can be collected and blocked by the outwardly expanding and arc-shaped middle part of the lower section 13, preventing the precipitates from spiraling upward into the upper section 12 and re-diffused and broken up due to the continuous rotation of the wastewater. This effectively ensures the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0036] As one embodiment of the present invention, refer to Figure 1 , Figure 6 and Figure 8 The tank body 1 is equipped with an inlet pipe 11, which is used to transport the filtered hard desulfurization wastewater into the tank body 1. The tank cover 2 is equipped with a suction pipe 21, which is a stainless steel flexible hose, used to extract the softened and filtered water. The tank also includes a motor 3, a dosing pipe 4, a pH meter 5, a filter plate 6, an agitator 7, and an adjustment assembly 8. The motor 3 and dosing pipe 4 are both located on the tank cover 2. The pH meter 5 is located inside the tank body 1. When the pH meter 5 detects a change in the pH value of the wastewater, it controls the dosing pipe 4 to add chemicals. This pH meter 5 is an industrial-grade pH meter. The submersible pH meter 5 can be installed inside the tank 1 for a long time to detect the pH value of the liquid inside the tank 1. The pH meter 5 is connected to an external controller, which controls the dosing pipe 4 to automatically add an appropriate amount of reagent to maintain the pH value of the desulfurization wastewater inside the tank 1 between 10 and 10.5, thereby ensuring the water softening effect. The filter plate 6 is set inside the tank 1. During the process of softening the desulfurization wastewater, the formed sediment is prevented from accumulating inside the filter plate 6, thereby preventing the sediment from directly clogging the filter plate 6.

[0037] As one embodiment of the present invention, refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7The agitator 7 passes through the filter plate 6 and is connected to the dosing pipe 4. When the motor 3 is working, it drives the agitator 7 to rotate the wastewater. The agitator 7 includes a guide 71, a hollow column 73, a limiting strip 72, and an agitator blade 74. The guide 71 is located at the output end of the motor 3. The hollow column 73 is coaxially sleeved on the rod wall of the guide 71 and has a limiting groove 731 at its end. The limiting strip 72 is located on the guide rod and is slidably disposed inside the limiting groove 731. The sleeve 713, the limiting strip 72, and the hollow column 73 are slidably fitted together. The roughness of the contact surfaces is less than or equal to 0.4μm, which ensures the sealing effect between the hollow column 73 and the sleeve 713 while ensuring the movable connection between them, thus preventing wastewater from flowing back into the sleeve 713. Multiple stirring blades 74 are arranged in a circumferential array on the surface of the hollow column 73. A guide groove 741 is opened on the surface of the stirring blade 74. The openings of the stirring blade 74 and the guide groove 741 are both arranged in a shape that is larger at the top and smaller at the bottom. The stirring blade 74 is inclined, and the guide groove 741 is oriented towards the rotation direction of the guide 71.

[0038] When the wastewater rotates, it drives the sediment from top to bottom from the edge of tank 1 towards the center and throws the reagent into the interior of tank 1. The guide 71 includes a rotating rod 711, a U-shaped rod 712, a sleeve 713, a hollow column 714, and a one-way valve 715. The upper end of the rotating rod 711 passes through the tank cover 2 and is connected to the output end of the motor 3. The sleeve 713 is located below the rotating rod 711 and is connected to the rotating rod 711 through the U-shaped rod 712. The limiting strip 72 is located on the surface of the sleeve 713. The hollow column 714 is coaxially rotatably sleeved on the rotating rod 711 and the sleeve 715. On the upper part 3, two dosing pipes 4 are provided and symmetrically installed through the hollow column 714. The upper end of the dosing pipe 4 extends to the outside of the tank cover 2. The sleeve 713 has a liquid outlet 7131. The stirring blade 74 has a groove 742 that communicates with the liquid outlet 7131. The one-way valve 715 is provided on the stirring blade 74 and communicates with the groove 742. There are multiple one-way valves 715. The distance between the multiple one-way valves 715 and the hollow column 73 decreases from top to bottom. The diameter of the multiple one-way valves 715 increases from top to bottom.

[0039] Under the above conditions, the motor 3 and pH meter 5 are started. The pH meter 5 detects the pH value of the desulfurization wastewater and controls the dosing pipe 4 to automatically add an appropriate amount of reagent through the external controller, maintaining the pH value of the wastewater inside the tank 1 between 10 and 10.5. The reagent entering the hollow column 714 through the dosing pipe 4 will enter the groove 742 through the sleeve 713 and the outlet 7131. Since the motor 3 is in working condition, the output end of the motor 3 drives the guide 71 to rotate. When the guide 71 rotates, it drives the limiting strip 72 to rotate. Since the hollow column 73 is sleeved with the guide 71 and has a limiting groove 731 opened along the axial direction, and the limiting strip 72 is set inside the limiting groove 731, the limiting strip 72 can drive the hollow column 73 to rotate as it rotates with the guide 71. Since the stirring blade 74 is set on the hollow column 73, the hollow column 73 rotates. During the rotation of column 73, the stirring blade 74 will rotate and stir the wastewater in the upper part. During the stirring process, the liquid in the groove 742 will be discharged from the corresponding one-way valve 715 to the bottom of the filter plate 6 and located in the wastewater to be softened under the action of centrifugal force and its own gravity. As the stirring blade 74 continues to rotate, the agent enters the wastewater and reacts chemically with the calcium and magnesium ions in the wastewater to form a precipitate. Under the action of the guide groove 741 on the surface of the stirring blade 74, the precipitate moves from the inner edge of the tank 1 to the center from top to bottom, and finally gathers in the arc-shaped setting of the middle of the lower section 13. This avoids the precipitate from colliding and breaking due to the upward movement of the precipitate when the wastewater rotates, thereby reducing the amount of fine particles of precipitate entering the interior of the filter plate 6 and ensuring the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0040] As one embodiment of the present invention, refer to Figure 1 and Figure 4 The regulating component 8 is installed through the tank cover 2 and connected to the filter plate 6. When the regulating component 8 is powered on and starts, it moves the filter plate 6 downward, pressurizing the clean water to the top of the filter plate 6 and allowing outside air to enter the regulating component 8. When the regulating component 8 resets, it transports the air inside its own body into the tank 1 and squeezes the filter plate 6 from top to bottom. The regulating component 8 includes a second sleeve 81, a U-shaped tube 82, a piston ring 83, a second check valve 84, and a third check valve 85. The second sleeve 81 is sleeved on the outside of the tank 1, and the piston ring 83 is located inside the second sleeve 81 and connected to the tank body. 1. A sleeve is provided at the connection point to ensure airtightness. The two ends of the U-shaped tube 82 pass through the tank cover 2 and the sleeve 2 81, and are respectively connected to the filter plate 6 and the piston ring 83. The U-shaped tube 82 and the piston ring 83 are detachably connected so that the piston ring 83 can be replaced when it ages due to long-term use. The one-way valve 2 84 is located inside the tank body 1 and is connected to the U-shaped tube 82. The one-way valve 3 85 is located inside the sleeve 2 81 and is connected to the piston ring 83. The end of the U-shaped tube 82 located inside the sleeve 2 81 has an air port 821.

[0041] Under the above conditions, after the calcium and magnesium ions in the wastewater have completely precipitated, the U-shaped tube 82 is driven to move downward by an external power source. Since the two ends of the U-shaped tube 82 are connected to the filter plate 6 and the piston ring 83 respectively, the U-shaped tube 82 can simultaneously drive the filter plate 6 and the piston ring 83 downward during its downward movement. During the downward movement of the filter plate 6, the softened wastewater can be pressure filtered. The clean water passing through the filter plate 6 is pumped out by the water pumping pipe 21, while the sediment remains below the filter plate 6 until the stirring blade 74 completely enters the lower section 13. After that, the sediment gathers inside the lower section 13, at which point it can be discharged through the discharge valve 14. Since one-way valve 2 84 is installed at one end of the U-shaped tube 82 inside the tank 1, and one-way valve 3 85 is installed on the piston ring 83, when the piston ring 83 moves downward... Air from outside tank 1 enters the interior of sleeve 2 81 through one-way valve 3 85. When the sediment is discharged, the U-shaped rod 712 moves the filter plate 6 and piston ring 83 upward, and the water inlet pipe 11 delivers the wastewater to be softened into the tank 1. The water level of the wastewater is controlled to be higher than the filter plate 6. After the wastewater to be softened is added in a metered amount, the filter plate 6 continues to move upward to a height higher than the wastewater level. Since the U-shaped pipe 82 has an air port 821, the air stored inside sleeve 2 81 enters the interior of the U-shaped pipe 82 through the air port 821 and finally enters the tank 1 through one-way valve 2 84. When the filter plate 6 is higher than the liquid level, the air pressure removes some of the sediment attached to its bottom, thereby ensuring the subsequent filtration effect of the filter plate 6 and ensuring the continuous and stable operation of the zero-discharge process for desulfurization wastewater.

[0042] As one embodiment of the present invention, refer to Figure 4 and Figure 5 The filter plate 6 includes a core plate 61, an annular plate 62, and a mounting bracket 63. The annular plate 62 is disposed inside the tank body 1, and the core plate 61 is disposed inside the annular plate 62. Two mounting brackets 63 are provided and symmetrically disposed on both sides of the core plate 61. The mounting bracket 63 on the upper side is detachably connected to the annular plate 62, and the mounting bracket 63 on the lower side is fixedly connected to the annular plate 62. The upper mounting bracket 63 is connected to the end of the U-shaped tube 82. A hollow column 73 is disposed through the two mounting brackets 63. The bottom inner wall of the annular plate 62 is conical. The annular plate 62 slides and fits against the inner wall of the tank body 1, and the roughness of the contact surface is less than or equal to 0.4 μm.

[0043] Under the above-mentioned conditions, it is ensured that the annular plate 62 can move along the axial direction of the tank 1, and the sealing effect between the annular plate 62 and the inner wall of the tank 1 is also guaranteed. This prevents the sediment from passing through the gap between the annular plate 62 and the tank 1 to the top of the filter plate 6 during the downward movement of the filter plate 6, thereby avoiding blockage at the top of the filter plate 6. During the downward movement of the filter plate 6, the bottom conical surface design of the annular plate 62 can be used to remove the sediment attached to the inner wall of the tank 1.

[0044] Working principle: During operation, a fixed amount of wastewater to be softened is delivered into the tank 1 through the inlet pipe 11, and the liquid level is lower than that of the filter plate 6. The pH meter 5 and motor 3 are started. The pH meter 5 detects the pH value of the wastewater and controls the dosing pipe 4 to automatically add the agent through the external controller. After the agent enters the hollow column 714 through the dosing pipe 4, it enters the groove 742 through the outlet 7131 on the surface of the sleeve 713. Since the stirring blade 74 is equipped with a one-way valve 715 that is connected to the inside of the groove 742, the agent in the groove 742 can enter the wastewater through the one-way valve 715, thereby reacting with the calcium and magnesium ions in the wastewater to form a precipitate and maintaining the pH value of the wastewater between 10 and 10.5 to ensure the softening effect of the wastewater.

[0045] When the motor 3 is working, it can drive the rotating rod 711 to rotate. Since the rotating rod 711 is connected to the sleeve 713 through the U-shaped rod 712, the rotation of the rotating rod 711 can drive the sleeve 713 to rotate through the U-shaped rod 712. Since the sleeve 713 is provided with a limiting strip 72 and is movably connected to the hollow column 73 through the limiting strip 72, and the stirring blade 74 is fixedly set on the hollow column 73, the hollow column 73 will drive the stirring blade 74 to rotate as it rotates with the sleeve 713. During the rotation of the stirring blade 74, the wastewater is stirred in the upper part of the wastewater area. On the one hand, it can stir the agent inside the groove 742. The reagent is thrown into the wastewater through the corresponding one-way valve 715, so that the reagent and wastewater are fully mixed and the calcium and magnesium ions in the wastewater can be effectively precipitated. On the other hand, during the rotation of the stirring blade 74, the precipitate will move from the inner edge of the tank 1 to the middle position under the action of the guide groove 741 on the surface of the stirring blade 74, and finally gather in the lower section 13 of the tank 1. This avoids the precipitate from repeatedly colliding and breaking with the stirring blade 74 due to the lift generated when the wastewater rotates under the action of the stirring blade 74, thereby preventing small precipitate particles from entering the interior of the filter plate 6 during the subsequent downward movement of the filter plate 6.

[0046] After the wastewater inside tank 1 is softened, the U-shaped tube 82 is driven downward by an external power source. Since the two ends of the U-shaped tube 82 are connected to the filter plate 6 and the piston ring 83 respectively, the filter plate 6 can filter the wastewater during the downward movement of the filter plate 6, leaving the sediment below the filter plate 6. At this time, the clean water filtered to the top of the filter plate 6 is extracted through the water suction pipe 21 until the stirring blade 74 is completely inserted into the lower section 13. The wastewater above the filter plate 6 is then completely extracted. At this time, the water inlet pipe 11 is not supplying water into the tank 1. The sediment left in the lower section 13 is discharged through the discharge valve 14. During the downward movement of the piston ring 83, the air outside the tank 1 will enter the sleeve 81 for storage under the action of the one-way valve 3 85. After the sediment is discharged, the U-shaped tube 82 is driven by the external power source to move the filter plate 6. As piston ring 83 moves upward, pH meter 5 is shut off, and a fixed amount of softened wastewater is re-introduced into tank 1 through inlet pipe 11. The upward movement speed of U-shaped tube 82 is controlled so that filter plate 6 remains inside the wastewater during the upward movement. During the upward movement of piston ring 83, air stored inside sleeve 2 81 is injected into U-shaped tube 82 through air port 821, and finally delivered to tank 1 through one-way valve 2 84, positioned above the wastewater surface. As the liquid level continues to rise, the space above the liquid level gradually decreases while the air content gradually increases. When wastewater is no longer supplied to tank 1 and filter plate 6 is removed from the wastewater, high-pressure air passes through filter plate 6, thereby removing the small amount of sediment attached to the bottom of filter plate 6, further ensuring the normal use of filter plate 6, and thus ensuring the continuous and stable operation of the desulfurization wastewater zero discharge process.

[0047] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated dosing control device for industrial wastewater treatment, comprising a tank and a tank cover, characterized in that: It also includes a motor, a dosing pipe, a pH meter, a filter plate, an agitator, and an adjustment component. The motor and the dosing pipe are both located on the tank cover. The pH meter is located inside the tank. When the pH meter detects a change in the pH value of the wastewater, it controls the dosing pipe to add the reagent. The filter plate is located inside the tank. The agitator is installed through the filter plate and connected to the dosing pipe. When the motor is working, it drives the agitator to rotate the wastewater. When the wastewater rotates, it moves the sediment from top to bottom from the edge of the tank towards the center and throws the reagent into the tank. The adjustment component is installed through the tank cover and connected to the filter plate. When the adjustment component is powered on and starts, it moves the filter plate downward, presses the clean water to the top of the filter plate, and allows outside air to enter the adjustment component. When the adjustment component resets, it transports the air inside its own body into the tank and squeezes the filter plate from top to bottom. The agitation assembly includes a guide, a hollow column, a limiting strip, and a stirring blade. The guide is located at the output end of the motor. The hollow column is coaxially sleeved on the rod wall of the guide and has a limiting groove at its end. The limiting strip is located on the guide rod and is slidably located inside the limiting groove. Multiple stirring blades are arranged in a circumferential array on the surface of the hollow column. A guiding groove is provided on the surface of the stirring blade. Both the stirring blade and the opening of the guiding groove are shaped with a larger opening at the top and a smaller opening at the bottom. The stirring blade is inclined and the guiding groove is oriented towards the rotation direction of the guide. The guide includes a rotating rod, a U-shaped rod, a sleeve, a hollow column, and a one-way valve. The upper end of the rotating rod passes through the tank cover and is connected to the output end of the motor. The sleeve is located below the rotating rod and is connected to the rotating rod through the U-shaped rod. A limiting strip is located on the surface of the sleeve. The hollow column is coaxially rotatably sleeved on the rotating rod and the sleeve. Two dosing pipes are provided and symmetrically pass through the hollow column. The upper end of the dosing pipe extends to the outside of the tank cover. A liquid outlet is provided on the sleeve. A groove is provided on the stirring blade that communicates with the liquid outlet. The one-way valve is located on the stirring blade and communicates with the groove. The regulating assembly includes a sleeve two, a U-shaped tube, a piston ring, a one-way valve two, and a one-way valve three. The sleeve two is fitted outside the tank body, the piston ring is located inside the sleeve two and is fitted into the tank body, the two ends of the U-shaped tube pass through the tank cover and the sleeve two, and are respectively connected to the filter plate and the piston ring, the one-way valve two is located inside the tank body and is connected to the U-shaped tube, the one-way valve three is located inside the sleeve two and is connected to the piston ring, and the end of the U-shaped tube located inside the sleeve two has an air port on its tube wall. The filter plate includes a core plate, an annular plate, and mounting brackets. The annular plate is located inside the tank, the core plate is located inside the annular plate, and there are two mounting brackets symmetrically arranged on both sides of the core plate. The upper mounting bracket is connected to the end of the U-shaped tube. A hollow column runs through both mounting brackets, and the bottom inner wall of the annular plate is conical. Multiple check valves are provided, and the distance between the multiple check valves and the hollow column decreases from top to bottom, while the diameter of the multiple check valves increases from top to bottom.

2. The automated dosing control device for industrial wastewater treatment according to claim 1, characterized in that: The tank body includes an upper section, a lower section, and a discharge valve. The tank cover is located at the top of the upper section, and the lower section is located at the bottom of the upper section. The inner diameter of the upper port of the lower section is smaller than the inner diameter of the middle part of the upper section. The middle part of the lower section is arranged in an outwardly expanding arc shape, and the discharge valve is located at the bottom of the lower section.

3. The automated dosing control device for industrial wastewater treatment according to claim 1, characterized in that: Sleeve 1, the limiting strip and the hollow column 1 are all slidably fitted together, as are the annular plate and the inner wall of the tank.

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