Sewage pretreatment equipment for concrete mixing plant
By combining online monitoring and ultrasonic sensor monitoring, the problems of inaccurate dosing of chemicals and easy clogging of honeycomb inclined tubes in the wastewater treatment of concrete mixing plants have been solved, achieving efficient and stable wastewater pretreatment and convenient equipment maintenance.
Patent Information
- Application Number
- CN202522764624.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-12-26
AI Technical Summary
Existing wastewater treatment equipment for concrete mixing plants suffers from problems such as inaccurate chemical dosing, uneven mixing, and easy clogging of honeycomb inclined tubes, which are also difficult to maintain. This results in low treatment efficiency, resource waste, and high operation and maintenance costs.
The system employs an online monitoring sensor and a capacitive liquid level sensor combined with a dosing assembly to achieve real-time data acquisition and dynamic adjustment. It also uses an ultrasonic transducer and ultrasonic sensor to monitor for blockage in the honeycomb inclined tube, forming an integrated protective structure to ensure thorough mixing of the reagent and stability of the honeycomb inclined tube.
It enables precise dosing and thorough mixing of reagents, reduces waste, improves processing efficiency and equipment lifespan, and lowers maintenance difficulty and cost.
Smart Images
Figure CN223866501U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment technical field, concretely is a kind of concrete mixing station sewage pretreatment equipment. BACKGROUND
[0002] With the acceleration of urbanization process, the scale of construction engineering is continuously expanded, the number and production capacity of concrete mixing station are continuously improved, and the sewage discharge amount generated in its daily operation also increases. This kind of sewage is mainly from the cleaning of mixer truck tank, the flushing of mixing host, the sweeping of silo ground and the spraying of aggregate, and a large amount of unhydrated cement residue, unrecovered sand and stone particles, and other substances are mixed in the sewage, the water quality is weakly alkaline, and a large amount of suspended impurities are contained, the property is complex and unstable. If it is directly discharged into the natural environment, not only the surrounding soil will be hardened, the river will be silted, and the ecological balance will be destroyed, but also the sand and stone resources in the sewage can be recycled and utilized will be wasted;At the same time, if the sewage enters the subsequent treatment system without effective pretreatment, the suspended particles are easy to cause pipeline blockage and equipment wear, which leads to a significant decrease in the subsequent treatment efficiency and a significant increase in the operation and maintenance cost, so the sewage pretreatment is the key link for concrete mixing station to realize environmental protection and efficient utilization of resources.
[0003] The existing dosing assembly is mainly fixed-dose dosing or simple linkage control based on a single water quality parameter, and cannot form effective cooperation with the real-time working condition of each treatment unit. Since the discharge amount and pollutant content of the sewage of the mixing station change sharply with the production rhythm, the fixed-dosing mode is easy to cause waste due to excessive dosing of reagent or insufficient dosing, which leads to substandard treatment effect;In addition, the stirring assembly in the adjusting tank is mainly designed with a single rotating speed, and cannot adjust the stirring intensity according to the change of the impurity concentration in the sewage and the dosing amount of the reagent, so local mixing is often uneven, the reagent and the sewage cannot fully react, and then the subsequent coagulation and sedimentation effect is affected.
[0004] The existing honeycomb inclined pipe in the coagulation tank is mainly fixedly installed, when a large amount of suspended impurities are attached to the surface of the inclined pipe to form blockage, the staff needs to enter the inside of the tank body to disassemble and clean, which is time-consuming and laborious, and seriously affects the pretreatment efficiency;Although some devices try to add anti-blocking structure, there is no real-time monitoring means for the blockage state of the inclined pipe, and the anti-blocking operation is blind, so it is difficult to accurately control the cleaning time. Therefore, the technical personnel in the field provide a kind of concrete mixing station sewage pretreatment equipment to solve the problems raised in the above background technology. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of concrete mixing station sewage pretreatment equipment to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A concrete mixing station sewage pretreatment equipment, comprising:
[0008] A treatment tank is provided with a coarse grid, and a first dosing assembly is installed on the treatment tank;
[0009] An adjusting tank is provided with a fine grid, and a stirring assembly for mixing chemicals is installed on the adjusting tank, and a second dosing assembly is installed on the adjusting tank;
[0010] A coagulation tank is provided with two third dosing assemblies, and the inner cavity of the coagulation tank is connected with a moving plate through a buffer assembly on both sides, the moving plate is connected with a moving frame through a clamping mechanism, the moving frame is provided with a honeycomb inclined pipe, and an ultrasonic transducer is installed on the moving frame, and an ultrasonic sensor is installed at the water outlet end of the honeycomb inclined pipe;
[0011] A first connecting assembly is arranged between the treatment tank and the adjusting tank, a second connecting assembly is arranged between the adjusting tank and the coagulation tank, and an online monitoring sensor and a capacitive liquid level sensor are installed in the treatment tank, the adjusting tank and the coagulation tank.
[0012] Preferably, the first dosing assembly, the second dosing assembly and the third dosing assembly each comprise a dosing barrel, a dosing pipe and an electric control valve, the dosing barrel is installed on the treatment tank, the adjusting tank and the coagulation tank respectively, one end of the dosing pipe is connected with the dosing barrel, and the other end of the dosing pipe is connected with the treatment tank, the adjusting tank and the coagulation tank respectively, and the electric control valve is installed on the dosing pipe.
[0013] Preferably, a first clamping groove is formed on the treatment tank, the coarse grid is clamped in the first clamping groove, and a handle is arranged on the coarse grid, two connecting plates are arranged in the adjusting tank, the fine grid is clamped between the two connecting plates, and a first access door is installed on the adjusting tank.
[0014] Preferably, the stirring assembly comprises a driving motor and a stirring frame, the stirring frame is rotatably connected to the adjusting tank, and the driving motor is installed on the adjusting tank, and the output end of the driving motor is connected with the extension end of the stirring frame penetrating through the adjusting tank.
[0015] Preferably, the buffer assembly comprises a fixed plate and a buffer spring, the fixed plate is fixedly installed in the coagulation tank, an installation slot is formed on the fixed plate, one end of the buffer spring is installed in the installation slot, and the other end of the buffer spring is connected with the moving plate, and a second access door is installed on the coagulation tank.
[0016] Preferably, the engaging mechanism includes a return spring, an engaging plate, and a lever plate. The moving plate has a moving groove. One end of the return spring is installed in the moving groove, and the other end of the return spring is connected to the engaging plate. The lever plate is installed on the engaging plate. The moving plate has a connecting groove. Both ends of the moving frame are engaged at the bottom of the connecting groove, and the moving frame has a second engaging groove for the engaging plate to engage.
[0017] Preferably, both the first connecting component and the second connecting component include a first connecting pipe, a second connecting pipe, and a water pump. The water pump is installed between the first connecting pipe and the second connecting pipe. The other end of the first connecting pipe is connected to the treatment tank and the equalization tank, respectively, and the other end of the second connecting pipe is connected to the equalization tank and the coagulation tank, respectively.
[0018] Preferably, a controller is installed on the treatment tank, and the controller is electrically connected to the ultrasonic transducer, ultrasonic sensor, online monitoring sensor, capacitive liquid level sensor, electric control valve, drive motor and water pump respectively.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] This invention achieves comprehensive real-time acquisition of water quality and level data from each treatment unit by installing online monitoring sensors and capacitive level sensors in the treatment tank, equalization tank, and coagulation tank, combined with the coordinated design of the first dosing component, the second dosing component, and two third dosing components. This overcomes the limitations of the single and fragmented dosing control in existing technologies. The monitoring data can accurately reflect the concentration of pollutants in the wastewater, the mixing state, and changes in the level, enabling the dosing components to dynamically adapt to the intermittent discharge of wastewater and large fluctuations in water quality at the mixing plant, avoiding problems of overdosing or underdosing of chemicals. Simultaneously, in conjunction with the mixing components in the equalization tank, the mixing intensity can be adjusted according to the real-time monitored impurity concentration and the amount of chemicals added, ensuring sufficient reaction between the chemicals and the wastewater. This significantly improves the accuracy and efficiency of dosing and mixing, reduces chemical waste, and ensures the stability of the pretreatment effect.
[0021] This invention utilizes a buffer assembly connected to a movable plate within a coagulation tank. The movable plate, via a locking mechanism, connects to a movable frame with honeycomb inclined tubes. Combined with an ultrasonic transducer and ultrasonic sensor, this forms an integrated structure that provides "buffering protection, convenient disassembly and assembly, and precise anti-clogging." The buffer assembly effectively mitigates damage to the honeycomb inclined tubes from water flow impact, preventing tube displacement and deformation, and improving sedimentation stability. The locking mechanism allows for disassembly of the movable frame and honeycomb inclined tubes without requiring personnel to enter the tank, making operation convenient and efficient, significantly reducing maintenance difficulty and time consumption. The ultrasonic sensor monitors the clogging status of the honeycomb inclined tubes in real time, triggering the ultrasonic transducer to precisely initiate anti-clogging operations. This solves the shortcomings of existing technologies, such as blind anti-clogging operations and difficulty in controlling the timing of cleaning, ensuring both coagulation and sedimentation efficiency and extending the service life of the honeycomb inclined tubes. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of a wastewater pretreatment device for a concrete mixing plant according to an embodiment of this application;
[0023] Figure 2 This is a cross-sectional structural schematic diagram of a wastewater pretreatment device for a concrete mixing plant according to an embodiment of this application;
[0024] Figure 3 This is a side sectional view of the coagulation tank of a wastewater pretreatment device for a concrete mixing plant according to an embodiment of this application.
[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0026] Figure 5 for Figure 3 Enlarged view at point B in the middle;
[0027] Figure 6 This is a schematic cross-sectional view of the coagulation tank of a wastewater pretreatment device for a concrete mixing plant according to an embodiment of this application.
[0028] Figure 7 for Figure 6 Enlarged view of point C.
[0029] In the diagram: 1. Treatment tank; 2. Coarse screen; 3. Equalization tank; 4. Fine screen; 5. Coagulation tank; 6. Moving plate; 7. Moving frame; 8. Honeycomb inclined tube; 9. Ultrasonic transducer; 10. Ultrasonic sensor; 11. Online monitoring sensor; 12. Capacitive level sensor; 13. Dosing cylinder; 14. Dosing pipe; 15. Electrically controlled valve; 16. First locking groove; 17. Handle; 18. Connecting plate; 19. First inspection door; 20. Drive motor; 21. Stirring frame; 22. Fixing plate; 23. Buffer spring; 24. Mounting groove; 25. Second inspection door; 26. Return spring; 27. Locking plate; 28. Toggle plate; 29. Moving groove; 30. Connecting groove; 31. Second locking groove; 32. First connecting pipe; 33. Second connecting pipe; 34. Water pump; 35. Controller. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Please see Figures 1-7This utility model provides a technical solution:
[0032] A wastewater pretreatment device for a concrete mixing plant, comprising:
[0033] Treatment tank 1, with a coarse screen 2 installed on it, and a first engaging groove 16 opened on it. The coarse screen 2 engages in the first engaging groove 16 and has a handle 17. The regulating tank 3 has two connecting plates 18, with a fine screen 4 engaged between the two connecting plates 18. The regulating tank 3 has a first inspection door 19 installed on it, and the treatment tank 1 has a first dosing assembly installed on it.
[0034] During operation, wastewater from the mixing plant is first introduced into treatment tank 1. A coarse screen 2 intercepts large impurities through its gaps, forming primary protection. Online monitoring sensors 11 and capacitive level sensors 12 within treatment tank 1 collect water quality and level data in real time and transmit them to controller 35. Controller 35 dynamically adjusts the opening of the electrically controlled valve 15 of the first dosing component based on the data, precisely injecting flocculant into treatment tank 1 to avoid waste or insufficient dosing. When the level reaches the set value, controller 35 activates the water pump 34 of the first connecting component, stably transporting the pretreated wastewater to the equalization tank 3 via the first connecting pipe 32 and the second connecting pipe 33, preventing turbulent impact from affecting subsequent treatment. This coordinated "monitoring-dosing-transportation" mechanism overcomes the limitations of traditional fixed dosing modes and is suitable for the intermittent discharge of wastewater from the mixing plant.
[0035] The equalization tank 3 is equipped with a fine grid 4 and a stirring assembly for drug mixing is installed on the equalization tank 3. The stirring assembly includes a drive motor 20 and a stirring frame 21. The stirring frame 21 is rotatably connected to the equalization tank 3. The drive motor 20 is installed on the equalization tank 3 and the output end of the drive motor 20 is connected to the extension end of the stirring frame 21 that passes through the equalization tank 3. A second drug dosing assembly is installed on the equalization tank 3.
[0036] After the wastewater enters the equalization tank 3, the fine screen 4 further intercepts fine impurities under the limiting action of the two connecting plates 18. The coarse screen 2 and the fine screen 4 form a "coarse-fine" gradient interception, reducing the subsequent treatment load from the source. At the same time, the online monitoring sensor 11 in the equalization tank 3 continuously feeds back water quality data. The controller 35 controls the opening of the electronically controlled valve 15 of the second dosing component based on the data, accurately injecting the pH adjuster, and simultaneously starts the drive motor 20 of the stirring component, driving the stirring frame 21 to rotate and achieve mixing of wastewater and chemicals. During the mixing process, the online monitoring sensor 11 provides real-time feedback on the mixing status, and the controller 35 can dynamically adjust the opening degree of the electronically controlled valve 15 (adjusting the dosage) and the speed of the drive motor 20 (adjusting the stirring intensity) to ensure that the chemicals and wastewater react fully, solving the problems of uneven mixing and insufficient chemical reaction in the prior art. After mixing is completed, the controller 35 starts the water pump 34 of the second connection component to steadily transport the sewage to the coagulation tank 5. Throughout the process, the controller 35, the online monitoring sensor 11, and the water pump 34 work together to ensure the stability of the water flow and prevent the tank from overflowing or the water pump 34 from running dry.
[0037] The coagulation tank 5 has two third dosing assemblies installed on it. Movable plates 6 are connected to both sides of the inner cavity of the coagulation tank 5 via buffer assemblies. The buffer assemblies include a fixed plate 22 and a buffer spring 23. The fixed plate 22 is fixedly installed inside the coagulation tank 5 and has an installation groove 24. One end of the buffer spring 23 is installed in the installation groove 24, and the other end is connected to the movable plate 6. A second inspection door 25 is installed on the coagulation tank 5. A movable frame 7 is connected to the movable plate 6 via a locking mechanism. The locking mechanism includes a return spring 26 and a locking mechanism. The moving plate 6 has a moving groove 29, a return spring 26 is installed at one end at the bottom of the moving groove 29 and the other end of the return spring 26 is connected to the locking plate 27, the lever 28 is installed on the locking plate 27, the moving plate 6 has a connecting groove 30, the two ends of the moving frame 7 are locked in the connecting groove 30, and the moving frame 7 has a second locking groove 31 for the locking plate 27 to lock in. The moving frame 7 has a honeycomb inclined tube 8 and an ultrasonic transducer 9 is installed on the moving frame 7. An ultrasonic sensor 10 is installed at the water outlet end of the honeycomb inclined tube 8.
[0038] After entering the coagulation tank 5, the controller 35 controls the electric control valves 15 of the two third dosing components to open according to the online monitoring data in the coagulation tank 5, accurately injecting coagulant and coagulant aid. The sewage reacts with the agents to form flocs, and efficient solid-liquid separation is achieved under the action of the honeycomb inclined tube 8. At this time, the buffer components (fixed plate 22 + buffer spring 23) on both sides of the inner cavity of the coagulation tank 5 play a role. The buffer spring 23 reduces the impact force when sewage flows in through elastic deformation, avoids displacement and deformation of the moving frame 7 and the honeycomb inclined tube 8, and ensures sedimentation stability. The moving plate 6 is connected to the moving frame 7 with honeycomb inclined tube 8 through the locking mechanism, and is equipped with ultrasonic transducer 9 and ultrasonic sensor 10 to form an integrated structure of "buffer protection - convenient disassembly and assembly - precise anti-clogging". The buffer component can effectively mitigate the damage to the honeycomb inclined tube 8 caused by water flow impact, prevent the inclined tube from shifting and deforming, and improve sedimentation stability. The locking mechanism allows the disassembly of the moving frame 7 and the honeycomb inclined tube 8 without the need for personnel to enter the pool, making the operation convenient and efficient, and greatly reducing the difficulty and time consumption of maintenance. The ultrasonic sensor 10 can monitor the blockage status of the honeycomb inclined tube 8 in real time and link the ultrasonic transducer 9 to accurately start the anti-blocking operation, which solves the defects of blind anti-blocking operation and difficulty in controlling the cleaning timing in the existing technology, ensuring both coagulation and sedimentation efficiency and extending the service life of the honeycomb inclined tube 8.
[0039] Specifically, the first, second, and third dosing components each include a dosing cylinder 13, a dosing pipe 14, and an electrically controlled valve 15. The dosing cylinder 13 is installed on the treatment tank 1, the equalization tank 3, and the coagulation tank 5, respectively. One end of the dosing pipe 14 is connected to the dosing cylinder 13, and the other end of the dosing pipe 14 is connected to the treatment tank 1, the equalization tank 3, and the coagulation tank 5, respectively. The electrically controlled valve 15 is installed on the dosing pipe 14.
[0040] A first connecting assembly is provided between the treatment tank 1 and the equalization tank 3, and a second connecting assembly is provided between the equalization tank 3 and the coagulation tank 5. Online monitoring sensors 11 and capacitive liquid level sensors 12 are installed in the treatment tank 1, the equalization tank 3 and the coagulation tank 5. The first connecting assembly and the second connecting assembly each include a first connecting pipe 32, a second connecting pipe 33 and a water pump 34. The water pump 34 is installed between the first connecting pipe 32 and the second connecting pipe 33. The other end of the first connecting pipe 32 is connected to the treatment tank 1 and the equalization tank 3 respectively, and the other end of the second connecting pipe 33 is connected to the equalization tank 3 and the coagulation tank 5 respectively.
[0041] During the equipment preparation phase, staff first check the cleanliness of the chambers of treatment tank 1, equalization tank 3, and coagulation tank 5. Then, they use the first engaging slot 16 to engage and fix the coarse screen 2 with handle 17 (holding handle 17 completes installation and removal). The fine screen 4 is then engaged between the two connecting plates 18 of equalization tank 3. Next, the moving frame 7 is connected to the moving plate 6 of coagulation tank 5 using an engaging mechanism (moving the lever 28 compresses the engaging plate 27 and the return spring 26; after placing the moving frame 7, releasing the lever 28 causes the return spring 26 to push the engaging plate 27 into the second engaging slot 31 of the moving frame 7, thus fixing the honeycomb inclined tube 8). Then, the corresponding reagents are injected into the dosing cylinders 13 of each dosing component (flocculator is injected into the first dosing component of treatment tank 1, pH adjuster into the second dosing component of equalization tank 3, and coagulant and coagulant aid into the two third dosing components of coagulation tank 5, respectively). The first inspection door 19 and the second inspection door 25 are closed, and the power is turned on to start the controller 35 to complete the preparation.
[0042] By installing online monitoring sensors 11 and capacitive level sensors 12 in treatment tank 1, equalization tank 3, and coagulation tank 5, and combining this with the coordinated design of the first dosing component, the second dosing component, and two third dosing components, comprehensive real-time acquisition of water quality and level data for each treatment unit is achieved. This breaks through the limitations of single and fragmented dosing control in existing technologies. The monitoring data can accurately reflect the concentration of pollutants in the wastewater, the mixing state, and changes in the level, enabling the dosing components to dynamically adapt to the intermittent discharge of wastewater and large fluctuations in water quality at the mixing station, avoiding problems of overdosing or underdosing of chemicals. At the same time, in conjunction with the mixing components in equalization tank 3, the mixing intensity can be adjusted according to the real-time monitored impurity concentration and the amount of chemicals added, ensuring that the chemicals and wastewater react fully. This significantly improves the accuracy and efficiency of dosing and mixing, reduces chemical waste, and ensures the stability of the pretreatment effect.
[0043] In the above embodiment, a controller 35 is installed on the treatment pool 1. The controller 35 is electrically connected to the ultrasonic transducer 9, the ultrasonic sensor 10, the online monitoring sensor 11, the capacitive liquid level sensor 12, the electric control valve 15, the drive motor 20 and the water pump 34.
[0044] It should be noted that the specific models and specifications of the controller 35, ultrasonic transducer 9, ultrasonic sensor 10, online monitoring sensor 11, capacitive liquid level sensor 12, electric control valve 15, drive motor 20 and water pump 34 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.
[0045] 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 wastewater pretreatment device for a concrete mixing plant, characterized in that, include: A treatment tank (1) is provided with a coarse screen (2) and a first dosing assembly is provided on the treatment tank (1). The regulating tank (3) is provided with a fine grid (4) and a stirring assembly for drug mixing is installed on the regulating tank (3). A second drug dosing assembly is installed on the regulating tank (3). The coagulation tank (5) is equipped with two third dosing components. The inner cavity of the coagulation tank (5) is connected to the two sides by a buffer component and a movable plate (6). The movable plate (6) is connected to a movable frame (7) by a locking mechanism. The movable frame (7) is provided with a honeycomb inclined tube (8) and an ultrasonic transducer (9) is installed on the movable frame (7). An ultrasonic sensor (10) is installed at the outlet end of the honeycomb inclined tube (8). A first connecting component is provided between the treatment tank (1) and the regulating tank (3), and a second connecting component is provided between the regulating tank (3) and the coagulation tank (5). Online monitoring sensors (11) and capacitive liquid level sensors (12) are installed in the treatment tank (1), the regulating tank (3) and the coagulation tank (5).
2. The wastewater pretreatment equipment for a concrete mixing plant according to claim 1, characterized in that: The first, second, and third dosing components each include a dosing cylinder (13), a dosing pipe (14), and an electrically controlled valve (15). The dosing cylinder (13) is installed on the treatment tank (1), the regulating tank (3), and the coagulation tank (5), respectively. One end of the dosing pipe (14) is connected to the dosing cylinder (13), and the other end of the dosing pipe (14) is connected to the treatment tank (1), the regulating tank (3), and the coagulation tank (5), respectively. The electrically controlled valve (15) is installed on the dosing pipe (14).
3. The wastewater pretreatment equipment for a concrete mixing plant according to claim 1, characterized in that: The treatment pool (1) is provided with a first engaging groove (16), the coarse grid (2) is engaged in the first engaging groove (16), and the coarse grid (2) is provided with a handle (17). The regulating pool (3) is provided with two connecting plates (18), the fine grid (4) is engaged between the two connecting plates (18), and the regulating pool (3) is provided with a first inspection door (19).
4. The wastewater pretreatment equipment for a concrete mixing plant according to claim 2, characterized in that: The stirring assembly includes a drive motor (20) and a stirring frame (21). The stirring frame (21) is rotatably connected to the regulating tank (3). The drive motor (20) is installed on the regulating tank (3), and the output end of the drive motor (20) is connected to the extension end of the stirring frame (21) that passes through the regulating tank (3).
5. The wastewater pretreatment equipment for a concrete mixing plant according to claim 1, characterized in that: The buffer assembly includes a fixed plate (22) and a buffer spring (23). The fixed plate (22) is fixedly installed in the coagulation tank (5). The fixed plate (22) has an installation groove (24). One end of the buffer spring (23) is installed in the installation groove (24), and the other end of the buffer spring (23) is connected to the movable plate (6). A second inspection door (25) is installed on the coagulation tank (5).
6. The wastewater pretreatment equipment for a concrete mixing plant according to claim 1, characterized in that: The locking mechanism includes a return spring (26), a locking plate (27), and a lever (28). The moving plate (6) has a moving groove (29). One end of the return spring (26) is installed at the bottom of the moving groove (29), and the other end of the return spring (26) is connected to the locking plate (27). The lever (28) is installed on the locking plate (27). The moving plate (6) has a connecting groove (30). Both ends of the moving frame (7) are locked in the connecting groove (30), and the moving frame (7) has a second locking groove (31) for the locking plate (27) to lock in.
7. The wastewater pretreatment equipment for a concrete mixing plant according to claim 4, characterized in that: The first connecting component and the second connecting component each include a first connecting pipe (32), a second connecting pipe (33) and a water pump (34). The water pump (34) is installed between the first connecting pipe (32) and the second connecting pipe (33). The other end of the first connecting pipe (32) is connected to the treatment tank (1) and the regulating tank (3) respectively, and the other end of the second connecting pipe (33) is connected to the regulating tank (3) and the coagulation tank (5) respectively.
8. The wastewater pretreatment equipment for a concrete mixing plant according to claim 7, characterized in that: The treatment tank (1) is equipped with a controller (35), which is electrically connected to the ultrasonic transducer (9), ultrasonic sensor (10), online monitoring sensor (11), capacitive liquid level sensor (12), electric control valve (15), drive motor (20) and water pump (34).