Industrial wastewater treatment system capable of accurately adding chemicals

Abstract

The invention relates to the technical field of wastewater treatment, in particular to an industrial wastewater treatment system capable of accurately adding chemicals. According to the device, raw water and a flocculating agent can be uniformly injected and mixed, meanwhile, the range of micro-flocs formed after the raw water and the flocculating agent react is limited, it is guaranteed that fine suspended particles and colloidal particles can be fully collided and polymerized, large flocs can be easily formed, and the flocculation and sedimentation effect is further improved; comprising a flocculation box, a sliding frame, a liquid distribution pipe set fixedly installed on the sliding frame, a semi-open type mesh enclosure mechanical trapper installed on the sliding frame, a sewage inlet pipe and a dosing mechanism, the liquid distribution pipe set is located in the semi-open type mesh enclosure mechanical trapper, and the output end of the sewage inlet pipe and the output end of the dosing mechanism are both communicated with the input end of the liquid distribution pipe set; a partition plate is installed in the flocculation box, the interior of the flocculation box is divided into a flocculation cavity and a static settlement cavity by the partition plate, and a lifting driver for providing power for vertical sliding of the sliding frame is installed on the flocculation box.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment, and in particular to an industrial wastewater treatment system capable of precise dosing. Background Technology

[0002] Fine suspended particles and colloidal particles in wastewater are the main "carriers" that cause wastewater to become turbid and colored, and carry a large number of pollutants, thus representing the core manifestation of wastewater's "dirtiness." Flocculation treatment overcomes the stability of fine suspended particles and colloidal particles through chemical and physical methods, "transforming" these tiny, harmful particles into a form that is easy to separate and remove from the water. It is a crucial step in the water treatment process, bridging the preceding and following stages.

[0003] For example, the utility model patent application with publication number CN219429734U discloses a precision dosing device for sewage treatment, which includes a treatment tank and a dosing tank. The treatment tank has an open structure at the top and a drain pipe at the bottom. A water pump is installed on one side of the dosing tank. One end of the water pump is connected to the dosing tank, and the other end is equipped with a delivery pipe. An electromagnetic flow meter is installed on the delivery pipe. A liquid level sensor is installed in the treatment tank, and a stirring component is installed on the treatment tank. The liquid level sensor measures the depth of sewage in the treatment tank, and the electromagnetic flow meter controls the dosage based on the depth, thereby improving the accuracy of dosing and avoiding the problem of over- or under-dosing.

[0004] However, the above-mentioned device still has the following defects: During the flocculation process, the stirring mechanism can promote the flocs and sewage to mix fully, but due to improper control of stirring intensity and time (the timing of slowing down stirring is difficult to control), the shear force of the stirring mechanism will cause the formed micro flocs to be broken, which is not conducive to the formation of large flocs in the later stage, and thus affects the flocculation treatment effect of sewage. How to achieve effective mixing of raw water and flocculant without interfering with the aggregation and sedimentation of flocs in the later stage has become an urgent problem to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an industrial wastewater treatment system that enables precise dosing of chemicals. This system achieves uniform mixing of raw water and flocculant while limiting the range of micro-flocs formed after the reaction between the raw wastewater and flocculant. This ensures that fine suspended particles and colloidal particles can fully collide and aggregate, facilitating the formation of large flocs and further improving the flocculation and sedimentation effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an industrial wastewater treatment system capable of precise dosing, comprising a flocculation tank, a slide, a liquid distribution pipe assembly fixedly installed on the slide, a semi-open mesh mechanical trap installed on the slide, a wastewater inlet pipe, and a dosing mechanism. The liquid distribution pipe assembly is located inside the semi-open mesh mechanical trap, and the output ends of the wastewater inlet pipe and the dosing mechanism are both connected to the input end of the liquid distribution pipe assembly. A partition is installed inside the flocculation tank, dividing the flocculation tank into a flocculation chamber and a settling chamber. The slide is slidably installed in the flocculation chamber. The bottom of the partition has an opening communicating with the bottom of the flocculation chamber and the settling chamber. A lifting drive is installed on the flocculation tank to provide power for the slide to slide up and down. The semi-open mesh mechanical trap includes a hemispherical mesh and a steering drive to provide power for the rotation of the hemispherical mesh. The opening end of the hemispherical mesh faces the direction of travel of the liquid distribution pipe assembly. Furthermore, the water pressure at the outlet of the liquid distribution pipe assembly should be less than 5 kPa to avoid impacting the sewage in the flocculation chamber and reducing the escape of the formed micro-flocculation particles from the semi-open mesh mechanical capture range. To this end, pressure reducing valves can be installed at the sewage inlet pipe and the outlet of the pressurizing mechanism to control the water pressure entering the liquid distribution pipe assembly. The lifting drive is preferably a telescopic cylinder, but other equivalent components that drive the slide frame to slide up and down can also be used. The telescopic cylinder can be powered by an external power system, hydraulic system, or pneumatic system. The steering drive can be a rotary table, with the output shaft center axis passing through a diameter on one side of the hemispherical mesh opening, providing power for the rotation of the hemispherical mesh. The hemispherical mesh can be an integral hemispherical mesh structure, driven by the steering drive to rotate the hemispherical mesh 180° in either the forward or reverse direction to adjust the opening orientation. A slide rail is fixedly installed on the inner wall of the flocculation chamber, and the slide frame slides vertically on the slide rail.

[0007] Preferably, the hemispherical mesh cover includes two quarter-sphere mesh bodies, and the steering drive provides power for the steering change of the two quarter-sphere mesh bodies. The steering drive includes two gears rotatably mounted on the slide, a double-sided rack sliding up and down on the slide and meshing with the two gears, a positioning rod mounted on the upper part of the double-sided rack, a positioning plate mounted on the lower part of the double-sided rack, an upper limit seat mounted on the upper part of the inner wall of the flocculation chamber and corresponding to the positioning rod, a lower limit seat mounted on the lower part of the inner wall of the flocculation chamber and corresponding to the positioning plate, and a locking clip mounted on the double-sided rack. A connecting shaft is fixedly mounted on each of the two gears. One end of the connecting shaft is fixedly connected to the corresponding gear, and the other end of the connecting shaft is connected to the corresponding quarter-sphere mesh body. Each quarter-sphere mesh body is provided with a semi-annular mesh body. Furthermore, the steering drive components are in two sets, symmetrically arranged on the carriage. After the two quarter-sphere nets close at the upper part of the flocculation chamber, they form a hemispherical net cover. An arc-shaped chamfer should be left at the adjacent corners of the two quarter-sphere nets to avoid interference between them during rotation. After the two quarter-sphere nets close at the lower part of the flocculation chamber, they form a net cover structure with a semi-cylindrical center and quarter-sphere ends. An arc-shaped chamfer should be left at the adjacent corners of the two semi-annular nets to avoid interference between them during rotation. The locking mechanism can be a telescopic rod or other equivalent component with automatic locking effect. The locking mechanism achieves the limiting lock between the double-sided rack and the carriage.

[0008] Preferably, the locking mechanism includes a slide rod slidably mounted on a double-sided rack, a tension spring sleeved on the slide rod, and a wedge-shaped locking block fixedly mounted on one end of the slide rod. One end of the tension spring is fixedly connected to the double-sided rack, and the other end of the tension spring is fixedly connected to the other end of the slide rod. The upper and lower parts of the slide frame are respectively provided with an upper locking groove and a lower locking groove that fit with the wedge-shaped locking block. Furthermore, the two conical surfaces of the wedge-shaped locking block face upward and downward respectively, so that the wedge-shaped locking block can slide out smoothly from the upper locking groove or the lower locking groove.

[0009] Preferably, the liquid distribution pipe assembly is equipped with a scraper that fits into the inner wall of the hemispherical mesh cover. The scraper is used to scrape off the attached flocculents on the inner wall of the hemispherical mesh cover. Further, the scraper is located around the liquid distribution pipe assembly. The scraper is preferably made of a rubber material with a certain degree of plasticity. The edge of the scraper is made of tongue-shaped plastic rubber, and the tongue-shaped plastic rubber has a margin to maintain contact with the inner wall of the hemispherical mesh cover, so as to ensure that the scraper always maintains contact with the inner wall of the hemispherical mesh cover.

[0010] Preferably, the device further includes a mixer mounted on top of the carriage, the mixer having a through-flow mixing chamber inside, and an annular cover outside the mixer forming a drug inlet annular cavity with the outer wall of the mixer. The output end of the wastewater inlet pipe is connected to the input end of the mixer, the input end of the liquid distribution pipe assembly is connected to the output end of the mixer, and the output end of the dosing mechanism is connected to the inside of the drug inlet annular cavity. The mixer has multiple circumferentially distributed connecting pipes, one end of which is connected to the drug inlet annular cavity, and the other end of which is connected to the mixing chamber. Further, the connections between the connecting pipes and the mixing chamber are circumferentially distributed around the central axis of the mixer.

[0011] Preferably, the dosing mechanism includes a dissolving tank and a metering pump, with the input end of the metering pump extending into the dissolving tank and the output end of the metering pump extending into the inlet ring cavity; furthermore, the metering pump is a metering pump with adjustable liquid flow rate, such as a plunger metering pump or a diaphragm metering pump.

[0012] Preferably, the upper part of the settling chamber is provided with an overflow trough, the flocculation box is equipped with a drain pipe that communicates with the upper part of the overflow trough, and the bottom of the flocculation box is provided with a sludge discharge pipe that communicates with the bottom of the settling chamber; furthermore, a sludge pump is installed at the sludge discharge pipe, and the bottom wall of the flocculation chamber gradually slopes downward toward the sludge discharge pipe.

[0013] Preferably, water quality and quantity monitors are installed on both the sewage inlet pipe and the sewage outlet pipe; furthermore, the water quality and quantity monitors are connected to the metering pump via an external PLC system or computer system; the water quality and quantity monitors include, but are not limited to, flow meters, online turbidity monitors, conductivity monitors, and pH monitors, to monitor the quality and quantity of influent and effluent water online, and analyze the real-time water quantity and quality of influent and effluent water through the external PLC system or computer system to control the amount of flocculant added to the sewage by the metering pump, so as to achieve precise control of the dosage. The water quality and quantity monitors and the metering pumps can both use commercially available known products (existing technology), and their specific structures and control principles will not be further described here.

[0014] Compared with existing technologies, this invention provides an industrial wastewater treatment system with precise dosing capabilities, offering the following advantages: This system uses a lifting drive to move a sliding frame and distribution pipe assembly up and down within the flocculation chamber. The dosing mechanism injects flocculants and other agents into the flocculation chamber through the distribution pipe assembly, ensuring uniform dispersion of the flocculant. The flocculant destabilizes and aggregates fine suspended particles and colloidal particles in the water that are difficult to settle, forming micro-flocs (flocs). As the hemispherical mesh cover moves downwards within the flocculation chamber, its opening faces downwards. When the hemispherical mesh cover reaches the lower part of the flocculation chamber, a steering drive rotates it, causing its port to face upwards. The micro-flocs are captured as the hemispherical mesh moves up and down, causing them to collide and accelerate their aggregation into large flocs. During this movement, wastewater and flocculant pass through the pores of the mesh, promoting thorough mixing. Simultaneously, the semi-open mesh mechanical capture device physically captures the micro-flocs, ensuring uniform mixing of raw water and flocculant while limiting the size of the micro-flocs formed by the reaction. This allows for sufficient collision and aggregation of fine suspended particles and colloidal particles, facilitating the formation of large flocs and further improving flocculation and sedimentation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a top view schematic diagram of the structure of the present invention; Figure 3 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is the invention Figure 3 Schematic diagram of the cross-sectional structure at point BB; Figure 5 This is the invention Figure 4 Schematic diagram of the cross-sectional structure at the CC section; Figure 6 This is a three-dimensional structural diagram of the semi-open mesh mechanical catcher of the present invention; Figure 7 This is the invention Figure 3 A magnified schematic diagram of the structure at point D in the middle; Figure 8 This is the invention Figure 3 A magnified schematic diagram of the structure at point E in the middle; Figure 9 This is the invention Figure 4 A magnified schematic diagram of the structure at point F in the middle; Figure 10 This is the invention Figure 6A magnified schematic diagram of the structure at point G in the middle; The attached diagram is labeled as follows: 1. Flocculation box; 2. Slide frame; 3. Liquid distribution pipe assembly; 4. Sewage inlet pipe; 5. Baffle plate; 6. Flocculation chamber; 7. Settling chamber; 8. Lifting drive; 9. 1 / 4 ball net body; 10. Gear; 11. Double-sided rack; 12. Positioning rod; 13. Positioning plate; 14. Upper limit seat; 15. Lower limit seat; 16. Coupling shaft; 17. Semi-circular net body; 18. Slide rod; 19. Tension spring; 20. Wedge-shaped locking block; 21. Upper locking groove; 22. Lower locking groove; 23. Scraper; 24. Mixer; 25. Mixing chamber; 26. Drug inlet ring chamber; 27. Connecting pipe; 28. Drug dissolving tank; 29. ​​Metering pump; 30. Overflow trough; 31. Drainage pipe; 32. Sludge discharge pipe; 33. Water quality and quantity monitor. Detailed Implementation

[0016] To enable those skilled in the art to better understand the invention, the technical solutions in the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the invention.

[0017] It should be noted that, without conflict, the embodiments and features and technical solutions in the invention can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] Example 1: Please refer to Figures 1-6 as well as Figure 10An industrial wastewater treatment system with precise dosing capability includes: a flocculation tank 1, a slide 2, a liquid distribution pipe assembly 3 fixedly installed on the slide 2, a semi-open mesh mechanical trap installed on the slide 2, a wastewater inlet pipe 4, and a dosing mechanism. The liquid distribution pipe assembly 3 is located inside the semi-open mesh mechanical trap. The output ends of the wastewater inlet pipe 4 and the dosing mechanism are both connected to the input end of the liquid distribution pipe assembly 3. A partition 5 is installed inside the flocculation tank 1, which divides the flocculation tank 1 into a flocculation chamber 6 and a settling chamber 7. The slide 2 is slidably installed in the flocculation chamber 6. The bottom of the partition 5 is provided with an opening that communicates with the bottom of the flocculation chamber 6 and the settling chamber 7. A lifting drive 8 is installed on the flocculation tank 1 to provide power for the slide 2 to slide up and down. The semi-open mesh mechanical trap includes a hemispherical mesh and a steering drive to provide power for the rotation of the hemispherical mesh. The opening end of the hemispherical mesh faces the side of the liquid distribution pipe assembly 3 in the direction of travel. Furthermore, the water pressure at the outlet of the liquid distribution pipe assembly 3 should be less than 5 kPa to avoid impacting the sewage in the flocculation chamber 6 and reducing the escape of the formed micro-flocculated particles from the semi-open mesh mechanical capture range. For this purpose, pressure reducing valves can be installed at the sewage inlet pipe 4 and the outlet of the pressurizing mechanism to control the water pressure entering the liquid distribution pipe assembly 3. The lifting drive 8 is preferably a telescopic cylinder, but other equivalent components that drive the slide 2 to slide up and down can also be used. The telescopic cylinder can be powered by an external power system, hydraulic system, or pneumatic system. In this embodiment, the hemispherical mesh can be an integral hemispherical mesh structure. The steering drive component drives the hemispherical mesh to rotate 180° in either the forward or reverse direction to adjust the hemisphere. The opening orientation of the hemispherical mesh cover; the steering drive can be a rotary table, with the output shaft center axis of the rotary table passing through a radial line on one side of the opening of the hemispherical mesh cover, providing power for the rotation of the hemispherical mesh cover; the opening allows large flocs to pass through, and the opening can create a flow obstruction effect on the large flocs passing through, while the uncaptured micro-flocs flowing through the opening can also be further captured by the large flocs gathered at the opening, further improving the flocculation effect of the flocs and improving the wastewater treatment effect; it should be noted that the frequency of the lifting drive 8 driving the slide 2 to move up and down should be 10-20 times / minute, and the lifting speed of the slide 2 should not be too fast to avoid interfering with the formation of flocs.

[0020] In another embodiment, the liquid distribution pipe assembly 3 is rotatably mounted on the slide 2. The input end of the liquid distribution pipe assembly 3 is rotatably and sealedly connected to the sewage inlet pipe 4 and the output end of the dosing mechanism. The slide 2 is equipped with a rotating turntable that provides power for the rotation of the liquid distribution pipe assembly 3. The rotating turntable drives the liquid distribution pipe assembly 3 to rotate so that the output end of the liquid distribution pipe assembly 3 always faces the inside of the hemispherical mesh cover. Alternatively, the liquid distribution pipe assembly 3 can be fixedly mounted inside the hemispherical mesh cover so that the liquid distribution pipe assembly 3 rotates synchronously with the hemispherical mesh cover, while the outlet end of the liquid distribution pipe assembly 3 always faces the inside of the hemispherical mesh cover. The water pressure at the outlet end of the liquid distribution pipe assembly 3 "pushes" the micro-flocculates into the hemispherical mesh cover, further reducing the "escape" of the micro-flocculates and improving the overall flocculation effect. A slide rail is fixedly mounted on the inner wall of the flocculation chamber 6, and the slide 2 is slidably mounted on the slide rail.

[0021] For details, please refer to Figure 1 , Figure 3 as well as Figure 8 It also includes a mixer 24 installed on the top of the carriage 2. The mixer 24 has a through mixing chamber 25 inside and an annular cover outside the mixer 24. The annular cover and the outer wall of the mixer 24 form a drug inlet annular cavity 26. The output end of the sewage inlet pipe 4 is connected to the input end of the mixer 24. The input end of the liquid distribution pipe group 3 is connected to the output end of the mixer 24. The output end of the dosing mechanism is connected to the inside of the drug inlet annular cavity 26. The mixer 24 is provided with multiple circumferentially distributed connecting pipes 27. One end of the connecting pipe 27 is connected to the drug inlet annular cavity 26 and the other end of the connecting pipe 27 is connected to the mixing chamber 25. Furthermore, the connection points between the connecting pipes 27 and the mixing chamber 25 are circumferentially distributed around the central axis of the mixer 24. The sewage inlet pipe 4 and the drug inlet pipe on the pressurizing mechanism that are connected to the mixer 24 should be flexible pipes with a margin for expansion and contraction.

[0022] For details, please refer to Figures 1-2 The dosing mechanism includes a dissolving tank 28 and a metering pump 29. The input end of the metering pump 29 extends into the dissolving tank 28, and the output end of the metering pump 29 extends into the inlet ring cavity 26. Furthermore, the metering pump 29 is a plunger-type metering pump, diaphragm-type metering pump, or other metering pump with adjustable liquid flow rate. A stirrer is installed inside the dissolving tank 28 to accelerate the dissolution of flocculants and other agents in the dissolving tank 28.

[0023] For details, please refer to Figures 1-5An overflow trough 30 is provided in the upper part of the settling chamber 7. A drain pipe 31 connected to the upper part of the overflow trough 30 is installed on the flocculation box 1. A sludge discharge pipe 32 connected to the bottom of the settling chamber 7 is provided at the bottom of the flocculation box 1. Furthermore, a sludge pump is installed at the sludge discharge pipe 32. The bottom wall of the flocculation chamber 6 gradually slopes downward towards the sludge discharge pipe 32. The sewage entering the settling chamber 7 further settles, with large flocs settling at the bottom of the settling chamber 7, while the upper clean liquid enters the overflow trough 30 and is discharged through the drain pipe 31. The sludge generated by the settling can be discharged through the sludge discharge pipe 32.

[0024] For details, please refer to Figures 1-3 Water quality and quantity monitors 33 are installed on both the sewage inlet pipe 4 and the drainage pipe 31. Furthermore, the water quality and quantity monitors 33 are connected to the metering pump 29 via an external PLC system or computer system. The water quality and quantity monitors 33 include, but are not limited to, flow meters, online turbidity monitors, conductivity monitors, and pH monitors, to monitor the quality and quantity of influent and effluent water online. Based on the real-time water quantity and quality of influent and effluent water, the external PLC system or computer system analyzes the data and controls the amount of flocculant added to the sewage by the metering pump 29 to achieve precise control of the dosage. Both the water quality and quantity monitors 33 and the metering pump 29 can be conventional, known products on the market (existing technology). Their specific structures and control principles will not be further elaborated here.

[0025] The industrial wastewater treatment system with precise dosing provided in this embodiment allows pressurized wastewater to enter the mixing chamber 25 of the mixer 24 through the wastewater inlet pipe 4. Meanwhile, the flocculant is stirred and prepared in the dissolving tank 28 to form a flocculant solution of a specific concentration. The flocculant in the dissolving tank 28 is pressurized by the metering pump 29 and injected into the inlet ring chamber 26 of the mixer 24. The flocculant is then dispersed into the mixing chamber 25 through the connecting pipes 27, achieving mixing of the flocculant with the incoming wastewater. This system works in conjunction with the wastewater inlet pipe 4 and the drain pipe 31. The water quality and quantity monitor 33 monitors the influent and effluent water quality and quantity. After data processing and analysis by an external PLC system or computer system, the metering pump 29 is appropriately adjusted to increase the pumping volume of flocculant, thereby achieving further uniform mixing of wastewater and flocculant. At the same time, the amount of flocculant added is adaptively adjusted according to the actual situation to ensure the precise amount of flocculant added to the wastewater. The continuous and controllable addition of flocculant by the metering pump 29 replaces the centralized addition into the flocculation chamber 6, greatly reducing the waste of flocculant.

[0026] Example 2: The industrial wastewater treatment system with precise dosing provided in Example 1 is further optimized. For details, please refer to... Figures 5-6 as well as Figure 10The hemispherical mesh cover includes two quarter-sphere mesh bodies 9. The steering drive provides power for the steering changes of the two quarter-sphere mesh bodies 9. The steering drive includes two gears 10 rotatably mounted on the slide 2, a double-sided rack 11 that slides up and down on the slide 2 and meshes with the two gears 10, a positioning rod 12 mounted on the upper part of the double-sided rack 11, a positioning plate 13 mounted on the lower part of the double-sided rack 11, an upper limit seat 14 mounted on the upper part of the inner wall of the flocculation chamber 6 and arranged corresponding to the positioning rod 12, a lower limit seat 15 mounted on the lower part of the inner wall of the flocculation chamber 6 and arranged corresponding to the positioning plate 13, and a locking clip mounted on the double-sided rack 11. A connecting shaft 16 is fixedly mounted on each of the two gears 10. One end of the connecting shaft 16 is fixedly connected to the corresponding gear 10, and the other end of the connecting shaft 16 is connected to the corresponding quarter-sphere mesh body 9. Each quarter-sphere mesh body 9 is provided with a semi-circular mesh body 17. Furthermore, there are two sets of steering drive components, which are symmetrically arranged on the carriage 2. After the two quarter-sphere net bodies 9 close at the upper part of the flocculation chamber 6, they form a hemispherical net cover. The adjacent corners of the two quarter-sphere net bodies 9 should have arc-shaped chamfered corners to avoid mutual interference during the rotation of the two quarter-sphere net bodies 9. After the two quarter-sphere net bodies 9 close at the lower part of the flocculation chamber 6, they form a net cover structure with a semi-cylindrical middle and quarter-sphere ends. The adjacent corners of the two semi-annular net bodies 17 should have arc-shaped chamfered corners to avoid mutual interference during the rotation of the two semi-annular net bodies 17. The locking device can be a telescopic rod or other equivalent device with automatic locking effect. The locking device can realize the limiting lock between the double-sided rack 11 and the carriage 2.

[0027] For details, please refer to Figures 4-5 as well as Figure 9The locking mechanism includes a slide rod 18 slidably mounted on a double-sided rack 11, a tension spring 19 sleeved on the slide rod 18, and a wedge-shaped locking block 20 fixedly mounted on one end of the slide rod 18. One end of the tension spring 19 is fixedly connected to the double-sided rack 11, and the other end of the tension spring 19 is fixedly connected to the other end of the slide rod 18. The upper and lower parts of the slide frame 2 are respectively provided with an upper locking groove 21 and a lower locking groove 22 that fit with the wedge-shaped locking block 20. Furthermore, the two conical surfaces of the wedge-shaped locking block 20 face upward and downward respectively, so that the wedge-shaped locking block 20 can slide smoothly out of the upper locking groove 21 or the lower locking groove 22. When the wedge-shaped locking block 20 is engaged in the lower locking groove 22, the opening of the semi-open mesh cover mechanical catcher faces upward. When block 20 is inserted into upper slot 21, the opening of the semi-open mesh mechanical catcher faces downward. The insertion position of wedge block 20 is adjusted by the up-and-down sliding of double-sided rack 11. Meanwhile, tension spring 19 ensures that wedge block 20 is always inserted into the corresponding upper slot 21 or lower slot 22, thereby achieving elastic limiting between double-sided rack 11 and slide 2. Compared with telescopic rod, this locking device does not require an external power source or a complex control system. It can achieve elastic limiting between double-sided rack 11 and slide 2 through a purely mechanical structure, and the locking device can automatically insert into the corresponding upper slot 21 or lower slot 22 as the relative positions of double-sided rack 11 and slide 2 change. The structure is simple.

[0028] For details, please refer to Figures 3-4 as well as Figures 6-7 The liquid distribution pipe assembly 3 is equipped with a scraper 23 that fits into the inner wall of the hemispherical mesh cover. The scraper 23 is used to scrape off the attached flocculents on the inner wall of the hemispherical mesh cover. Furthermore, the scraper 23 is located around the liquid distribution pipe assembly 3. The scraper 23 is preferably made of rubber with a certain degree of plasticity. The edge of the scraper 23 is made of tongue-shaped plastic rubber. The tongue-shaped plastic rubber has a margin to maintain contact with the inner wall of the hemispherical mesh cover, so as to ensure that the scraper 23 always maintains contact with the inner wall of the hemispherical mesh cover.

[0029] The industrial wastewater treatment system with precise dosing capability provided in this embodiment is available for reference. Figures 4-5 The semi-open mesh mechanical catcher is composed of Figure 4When the state moves downward, the locking mechanism locks the double-sided rack 11 to the slide 2, and the two quarter-ball net bodies 9 remain in a closed state. When the bottom of the positioning plate 13 contacts the lower limit seat 15, the double-sided rack 11 is stationary, while the slide 2 continues to move downward. The two gears 10 roll downward relative to the double-sided rack 11. During the rotation of the gears 10, the two quarter-ball net bodies 9 rotate synchronously until the two semi-circular net bodies 17 close together. The locking mechanism locks the double-sided rack 11 to the slide 2 again, forming a net cover structure with a semi-cylindrical shape in the middle and quarter-ball shapes at both ends, which continues to move upward. When the two positioning rods 12 contact the upper limit seat 14, the double-sided rack 11 stops moving, and the two gears 10 roll upward relative to the double-sided rack 11, causing the two quarter-ball net bodies 9 to close again. Figure 4 As shown, the mechanical structure described above enables automatic switching of the opening direction of the hemispherical mesh cover, eliminating the need for additional electric or hydraulic power drives to rotate the two quarter-sphere mesh bodies 9. This avoids the need for electric or hydraulic power drives to be immersed in water, reducing the equipment failure rate and improving the safety of equipment use. Furthermore, the two quarter-sphere mesh bodies 9 are separated by rotating from each other, which facilitates the discharge of large flocs formed inside the semi-open mesh cover mechanical catcher, greatly improving the smoothness of the discharge of large flocs.

[0030] During the process of the two quarter-sphere mesh bodies 9 separating or closing, the scraper 23 can scrape off the large flocs attached to the inner wall of the hemispherical mesh cover, avoiding excessive accumulation of large flocs inside the hemispherical mesh cover; thus realizing automatic cleaning of large flocs attached inside the hemispherical mesh cover without human intervention.

[0031] The process of using the industrial wastewater treatment system with precise dosing provided by this invention is as follows: Pressurized wastewater is injected into the mixer 24 through the wastewater inlet pipe 4. The dosing mechanism injects the prepared flocculant into the mixer 24 through the metering pump 29. After the flocculant and wastewater are initially mixed in the mixer 24, they are sprayed out through the distribution pipe assembly 3. As the lifting drive 8 moves the slide 2 and the distribution pipe assembly 3 up and down, the flocculant and fresh wastewater are evenly distributed in the flocculation chamber 6. The hemispherical mesh cover, while moving up and down with the slide 2, creates a "stirring" effect on the wastewater in the flocculation chamber 6, further promoting the uniform mixing of flocculant and wastewater. After the flocculant and wastewater are mixed, chemical and physical reactions occur. The flocculant destabilizes and aggregates the fine suspended particles and colloidal particles in the water that are difficult to settle, forming... Micro-flocs are formed, and the opening of the hemispherical mesh cover faces downward when it moves down in the flocculation chamber 6. When the hemispherical mesh cover moves to the lower part of the flocculation chamber 6, the steering drive component drives the hemispherical mesh cover to rotate, so that the port of the hemispherical mesh cover faces upward. The micro-flocs formed are captured during the up and down movement of the hemispherical mesh cover, which promotes the collision between the micro-flocs entering the hemispherical mesh cover and accelerates the aggregation of micro-flocs into large flocs. During the opening and closing of the two 1 / 4 ball mesh bodies 9, the scraper 23 scrapes the large flocs in the hemispherical mesh cover away. The large flocs settle at the bottom of the flocculation box 1. Under the action of gravity, the large flocs further aggregate to form sludge. The sludge is sucked out and discharged from the sludge discharge pipe 32 by the sludge pump. The upper layer of clean water in the settling chamber 7 overflows through the overflow tank 30 and is discharged through the drain pipe 31.

[0032] In this invention, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. An industrial wastewater treatment system capable of precise dosing, characterized in that, The system includes a flocculation box (1), a slide (2), a liquid distribution pipe assembly (3) fixedly installed on the slide (2), a semi-open mesh mechanical trap installed on the slide (2), a sewage inlet pipe (4), and a dosing mechanism. The liquid distribution pipe assembly (3) is located inside the semi-open mesh mechanical trap. The output ends of the sewage inlet pipe (4) and the dosing mechanism are connected to the input end of the liquid distribution pipe assembly (3). A partition (5) is installed inside the flocculation box (1), which divides the flocculation box (1) into flocculation chambers (6). The slide (2) is slidably installed in the flocculation chamber (6) and the settling chamber (7). The bottom of the partition (5) is provided with an opening that communicates with the bottom of the flocculation chamber (6) and the settling chamber (7). The flocculation box (1) is equipped with a lifting drive (8) that provides power for the slide (2) to slide up and down. The semi-open mesh mechanical catcher includes a hemispherical mesh and a steering drive that provides power for the rotation of the hemispherical mesh. The opening end of the hemispherical mesh faces the side of the liquid distribution pipe group (3) in the direction of travel.

2. The industrial wastewater treatment system with precise dosing capability according to claim 1, characterized in that, The hemispherical mesh cover includes two quarter-sphere mesh bodies (9). The steering drive provides power for the steering changes of the two quarter-sphere mesh bodies (9). The steering drive includes two gears (10) rotatably mounted on the slide (2), a double-sided rack (11) sliding up and down on the slide (2) and meshing with the two gears (10), a positioning push rod (12) mounted on the upper part of the double-sided rack (11), a positioning top plate (13) mounted on the lower part of the double-sided rack (11), and a positioning top plate (13) mounted on the upper part of the inner wall of the flocculation chamber (6) and meshing with the positioning push rod. (12) The upper limit seat (14) is arranged accordingly, the lower limit seat (15) is installed on the lower part of the inner wall of the flocculation chamber (6) and is arranged corresponding to the top plate (13), and the locking clip is installed on the double-sided rack (11). A connecting shaft (16) is fixedly installed on both gears (10). One end of the connecting shaft (16) is fixedly connected to the corresponding gear (10), and the other end of the connecting shaft (16) is connected to the corresponding 1 / 4 ball net body (9). A semi-circular net body (17) is provided on each of the 1 / 4 ball net bodies (9).

3. The industrial wastewater treatment system with precise dosing capability according to claim 2, characterized in that, The locking mechanism includes a slide rod (18) slidably mounted on a double-sided rack (11), a tension spring (19) sleeved on the slide rod (18), and a wedge-shaped locking block (20) fixedly mounted on one end of the slide rod (18). One end of the tension spring (19) is fixedly connected to the double-sided rack (11), and the other end of the tension spring (19) is fixedly connected to the other end of the slide rod (18). The upper and lower parts of the slide frame (2) are respectively provided with an upper locking groove (21) and a lower locking groove (22) that fit with the wedge-shaped locking block (20).

4. The industrial wastewater treatment system with precise dosing capability according to claim 3, characterized in that, The liquid distribution pipe assembly (3) is equipped with a scraper (23) that fits into the inner wall of the hemispherical mesh cover. The scraper (23) is used to scrape off the attached flocs on the inner wall of the hemispherical mesh cover.

5. The industrial wastewater treatment system with precise dosing capability according to claim 1 or 4, characterized in that, It also includes a mixer (24) installed on the top of the carriage (2), the mixer (24) has a through mixing chamber (25) inside, the mixer (24) has an outer ring cover, the ring cover and the outer wall of the mixer (24) form a drug inlet ring chamber (26), the output end of the sewage inlet pipe (4) is connected to the input end of the mixer (24), the input end of the liquid distribution pipe group (3) is connected to the output end of the mixer (24), the output end of the dosing mechanism is connected to the inside of the drug inlet ring chamber (26), the mixer (24) has a plurality of circumferentially distributed connecting pipes (27), one end of the connecting pipe (27) is connected to the drug inlet ring chamber (26), and the other end of the connecting pipe (27) is connected to the mixing chamber (25).

6. The industrial wastewater treatment system with precise dosing capability according to claim 5, characterized in that, The dosing mechanism includes a dissolving tank (28) and a metering pump (29). The input end of the metering pump (29) extends into the dissolving tank (28), and the output end of the metering pump (29) extends into the drug inlet ring cavity (26).

7. The industrial wastewater treatment system with precise dosing capability according to claim 6, characterized in that, The upper part of the settling chamber (7) is provided with an overflow trough (30), the flocculation box (1) is provided with a drain pipe (31) that communicates with the upper part of the overflow trough (30), and the bottom of the flocculation box (1) is provided with a sludge discharge pipe (32) that communicates with the bottom of the settling chamber (7).

8. The industrial wastewater treatment system with precise dosing capability according to claim 7, characterized in that, Water quality and quantity monitors (33) are installed on both the sewage inlet pipe (4) and the drainage pipe (31).

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