Pre-oxidation and coagulation integrated water treatment experimental device

Abstract

The invention provides a pre-oxidation and coagulation integrated water treatment experiment device, and relates to the technical field of sewage treatment, the pre-oxidation and coagulation integrated water treatment experiment device comprises a support frame, a mixing unit is mounted at the top end of the support frame, and an extraction unit and a water taking unit are mounted on the mixing unit; the extraction unit is used for sampling the sewage oxidized by the plurality of groups of mixing units at the same time; the water taking unit is used for simultaneously extracting a plurality of groups of supernatant liquid after sewage precipitation and adjusting the extraction height according to the depth of the supernatant liquid; the mixing unit comprises a mixing part, a driving part and a precipitation part, and the mixing part is used for physically separating multiple groups of sewage samples and synchronously mixing each group of sewage samples with a treatment agent; according to the sewage treatment device, the motor drives the driving gear to synchronously drive all the driven gears to rotate and drive the vertical shaft and the stirring blades to rotate, so that sewage, an oxidant and a coagulant in the multiple groups of mixing boxes are synchronously stirred respectively, and errors caused by manually controlling multiple groups of stirring devices are avoided.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment, and in particular to an integrated pre-oxidation and coagulation water treatment experimental device. Background Technology

[0002] Against the backdrop of increasingly severe global water scarcity and water pollution, the development of efficient and low-cost water treatment technologies has become a core issue in the field of environmental engineering. The pre-oxidation-coagulation combined process, as a key technology in wastewater treatment that combines economy and practicality, is widely used in scenarios such as advanced industrial wastewater treatment, municipal wastewater pretreatment, and drinking water purification. Its technical logic involves using the strong oxidizing effect of oxidants (such as potassium permanganate, sodium hypochlorite, and ozone) to decompose the molecular structure of recalcitrant organic pollutants in wastewater, destroy the stable charge layer on the surface of colloidal particles, and simultaneously oxidize and remove some reducing substances (such as sulfides and ferrous ions). Subsequently, coagulants (such as polyaluminum chloride, ferrous sulfate, and polyacrylamide) are added, utilizing the polynuclear hydroxyl groups generated by the hydrolysis of the coagulant to coordinate with... Through adsorption, bridging, and trapping, small-molecule pollutants formed after oxidation and destabilized colloids are agglomerated into large-volume flocs. Finally, solid-liquid separation is achieved through sedimentation, reducing water turbidity, chemical oxygen demand (COD), suspended solids (SS), and heavy metal ion concentrations. In the laboratory, verifying the stability of the treatment effect of a fixed process parameter (such as oxidant dosage and coagulant dosage) typically requires running three or more experiments simultaneously, with identical reagent dosages in each group. Multiple sets of test data are then obtained. If the deviation between the multiple sets of data is less than 5%, it proves that the treatment effect is stable under the process parameter, avoiding distortion of results due to accidental factors (such as uneven local reagent dissolution) in a single experiment. However, existing experimental devices still have the following problems in practical applications:

[0003] 1. Currently, pre-oxidation treatment, coagulation reaction and sedimentation separation usually rely on three or more independent devices to complete the process step by step. The experimental process requires manual transfer of water samples multiple times. For example, in the pre-oxidation stage, wastewater and oxidant need to be mixed and reacted in a stirring beaker. After the reaction is completed, it needs to be manually transferred to the coagulation stirring device using a pipette or beaker. After the coagulation reaction is completed, the mixture needs to be poured into the sedimentation cylinder or sedimentation tank one by one. This process consumes a lot of manpower and the operation steps are cumbersome.

[0004] 2. After sedimentation, the core step is to extract the supernatant for index testing. Current sampling methods mainly involve manual suction with a pipette or pouring from a measuring cup. On the one hand, manual sampling makes it difficult to operate multiple water samples simultaneously. The time difference between sampling groups can cause some water samples to continue to settle or flocs to float to the surface while waiting, affecting the cross-comparison of test results. On the other hand, inserting a pipette or pouring a measuring cup can easily disturb the sediment layer, causing the settled flocs to be resuspended in the supernatant, resulting in higher turbidity values ​​and distorted COD test results in subsequent tests. Therefore, it is necessary to provide an integrated pre-oxidation coagulation water treatment experimental device to solve the above technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides an integrated pre-oxidation coagulation water treatment experimental device.

[0006] This invention provides an integrated pre-oxidation and coagulation water treatment experimental device, comprising a support frame, a mixing unit mounted on the top of the support frame, and an extraction unit and a water intake unit mounted on the mixing unit. The extraction unit is used to simultaneously sample wastewater after oxidation treatment by multiple mixing units. The water intake unit is used to simultaneously extract the supernatant after sedimentation of multiple wastewater samples, and adjusts the extraction height according to the depth of the supernatant. The mixing unit includes a mixing component, a driving component, and a sedimentation component. The mixing component is used to physically separate multiple wastewater samples and to simultaneously mix each wastewater sample with the treatment agent. The driving component is used to drive the mixing component to rotate and accelerate the mixing of wastewater and treatment agent. The sedimentation component is used to collect and precipitate the mixture after the mixing treatment is completed.

[0007] Preferably, the mixing components are arranged in a circumferential array of several groups. The mixing components include a mixing box. The top of the mixing box is fixedly connected to a feed hopper that communicates with its interior. A vertical shaft is provided on the inner side of the mixing box. The vertical shaft is rotatably connected to the top of the mixing box through a through-hole. Several stirring blades are fixedly sleeved on the outer side of the vertical shaft at equal intervals from bottom to top. A driven gear is fixedly sleeved on the top of the vertical shaft.

[0008] Preferably, the driving component includes a fixed base, the side wall of which is fixedly connected to the outer side wall of the mixing box, a motor is fixedly mounted on the top of the fixed base, a driving gear is fixedly connected to the rotating end of the motor, and the driven gear meshes with the driving gear.

[0009] Preferably, the sedimentation component includes a hollow ring, which is fixedly connected to the bottom of several mixing tanks. A through-hole is provided at the top of the hollow ring, communicating with the bottom outlet of the mixing tank. An annular valve plate is rotatably and sealingly connected to the inner side of the hollow ring. Several guide holes, corresponding one-to-one with the through-hole, are longitudinally provided on the annular valve plate, arranged in a circumferential array. A connecting pipe is fixedly connected to the bottom of each hollow ring directly below the through-hole, communicating with its interior. One end of the connecting pipe is connected to a sedimentation tank. The top of the sedimentation tank is fixedly connected to the bottom of the mixing tank. A rotating cylinder is rotatably connected to the bottom of the fixed base. Several horizontal bars are arranged in a circumferential array on the outer side of the rotating cylinder and fixedly connected thereto. An movable opening, corresponding one-to-one with the horizontal bar, is provided on the inner side of the hollow ring. One end of each horizontal bar passes through the corresponding movable opening and is fixedly connected to the inner wall of the annular valve plate.

[0010] Preferably, a crossbeam is fixedly connected to the outer side wall of several sedimentation tanks. The extraction unit includes an opening and closing component and an extraction component. The opening and closing component includes a first electric cylinder, which is fixedly installed through the crossbeam. A push frame is fixedly connected to the telescopic end of the first electric cylinder. A toggle column is fixedly connected to the top of the push frame. A vertical guide groove and a spiral guide groove are provided on the side wall of the rotating drum. The top end of the vertical guide groove is connected to the bottom end of the spiral guide groove. The toggle column is slidably disposed in the vertical guide groove.

[0011] Preferably, the extraction component includes a hollow shell, which is correspondingly arranged with a mixing box. The hollow shell is fixedly connected to the outer wall of the corresponding mixing box. The hollow shell and the mixing box share a through hole for connecting them. A water outlet pipe communicating with the interior of the hollow shell is fixedly connected to one side of the hollow shell. The water outlet pipe is directly opposite the through hole. A sealing valve plate is slidably connected to the inner side of the hollow shell. A water outlet hole is opened horizontally through the sealing valve plate. A vertical connecting rod is fixedly connected to the bottom of the sealing valve plate. The bottom end of the vertical connecting rod passes through the hollow shell and is fixedly connected to the top of the pusher frame.

[0012] Preferably, the water intake unit includes a lifting component and a filtration and drainage component; the lifting component includes a second electric cylinder, which is fixedly installed at the bottom of the crossbeam plate, and the telescopic end of the second electric cylinder is fixedly connected to a lifting frame. The lifting frame is located below the sedimentation tank, and a long through-hole is opened horizontally on one side of the sedimentation tank. Two L-shaped grooves fixedly connected to the sedimentation tank are symmetrically arranged on both sides of the long through-hole. A vertical baffle is provided on one side of the sedimentation tank corresponding to the long through-hole. The two sides of the vertical baffle are slidably inserted into the L-shaped grooves of the L-shaped grooves, and the bottom of the vertical baffle is fixedly connected to the top of the lifting frame.

[0013] Preferably, the filtration and drainage component includes a mounting frame, which is slidably connected to the inner side of the sedimentation tank. The outer side wall of the mounting frame is slidably fitted to the inner side wall of the sedimentation tank. A filter screen is fixedly connected to the inner side of the mounting frame. A sample outlet pipe is horizontally and fixedly connected to the upper part of the vertical baffle. One end of the sample outlet pipe passes through the long through-hole and is fixedly connected to the side wall of the mounting frame.

[0014] Preferably, a tray is fixedly connected between the side walls of two adjacent sedimentation tanks, and a first measuring cup is provided on the top of the tray.

[0015] Preferably, the top of the lifting frame has several second measuring cups that correspond one-to-one with the sample outlet tube.

[0016] Compared with related technologies, the pre-oxidation coagulation integrated water treatment experimental device provided by the present invention has the following beneficial effects:

[0017] 1. In this invention, the motor drives the active gear to synchronously drive all driven gears to rotate, which in turn drives the vertical shaft and stirring blades to rotate. This allows the wastewater, oxidant, and coagulant in multiple mixing tanks to be stirred synchronously, avoiding errors caused by manually controlling multiple stirring devices and ensuring greater consistency in stirring rate and duration across experiments. The hollow ring in the sedimentation component is connected to the bottom of all mixing tanks, and the annular valve plate is connected to the rotating drum via a horizontal bar. The rotating drum is driven by the opening and closing components of the extraction unit. After coagulation and stirring are completed, the first electric cylinder is activated, and its extension end drives the push frame and actuating column to move upward. After the actuating column enters the spiral guide groove, it drives the rotating drum to rotate, which in turn drives the annular valve plate to rotate synchronously via the horizontal bar. This ensures that the guide holes on the annular valve plate correspond one-to-one with the connecting holes of the hollow ring. At this time, the pre-oxidized coagulated mixture in all mixing tanks can flow synchronously into the corresponding sedimentation tank through the connecting holes, guide holes, and connecting pipes, achieving a consistent sedimentation start time across multiple experiments. This avoids experimental data deviations caused by sedimentation time differences, significantly improves the reliability of parallel experimental data, and makes the overall operation more convenient.

[0018] 2. This device is based on a support frame, with a mixing unit integrated at the top. The extraction unit and water collection unit are installed on the mixing unit. The sedimentation tanks are fixed together by a crossbeam, forming an integrated structure of mixing-reaction-sedimentation-sampling. During the experiment, the water sample does not need to be transferred between multiple independent devices. From the addition of sewage to the mixing tank to pre-oxidation stirring, coagulation stirring, synchronous sedimentation, and then to sampling after pre-oxidation and extraction of the clear liquid after sedimentation, all are completed on the same device, which greatly shortens the experimental operation time, reduces manual intervention steps, and reduces the complexity of operation.

[0019] 3. The extraction components of the extraction unit correspond one-to-one with the mixing tank. After the pre-oxidation stirring is completed, the first electric cylinder drives the push frame to rise, which simultaneously drives all the sealing valve plates to slide in the hollow shell, so that the water outlet on the sealing valve plate corresponds to the guide hole between the mixing tank and the hollow shell. Multiple sets of pre-oxidized water samples can flow into the corresponding first measuring cup simultaneously through the guide hole, water outlet and water outlet pipe, so as to realize the simultaneous sampling of multiple sets of water samples, avoid the time difference caused by manual sampling one by one, and the sampling volume can be directly controlled through the first measuring cup to ensure the consistency of each set of test samples.

[0020] 4. After sedimentation, the lifting frame and vertical baffle are raised and lowered synchronously by the telescopic end of the second electric cylinder, which in turn moves the mounting frame and filter screen inside the sedimentation tank. The height of the filter screen is adjusted: initially, the filter screen is located on the upper layer of the clear liquid. As the vertical baffle slowly descends, the filter screen gradually filters and collects the upper clear liquid at different depths. The clear liquid flows into the second measuring cup through the sample outlet tube. During this process, the filter screen can block the sediment layer and avoid disturbing the sediment during sampling. It can also flexibly adjust the extraction height according to the depth of the clear liquid to ensure the purity of the extracted clear liquid and improve the reliability of the coagulation sedimentation effect test data. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of the pre-oxidation coagulation integrated water treatment experimental device provided by the present invention;

[0022] Figure 2 This is an overall cross-sectional view of the pre-oxidation coagulation integrated water treatment experimental device of the present invention;

[0023] Figure 3 This is an enlarged view of point A in this invention;

[0024] Figure 4 This is a cross-sectional view of the mixing tank in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the drive gear in this invention;

[0026] Figure 6 This is a partial cross-sectional view of the hollow ring in this invention;

[0027] Figure 7 This is a schematic diagram of the hollow ring structure in this invention;

[0028] Figure 8 This is a schematic diagram of the structure at the movable opening in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the annular valve plate in this invention;

[0030] Figure 10 This is a schematic diagram of the structure of the push frame in this invention;

[0031] Figure 11 This is a schematic diagram of the structure of the rotating cylinder in this invention;

[0032] Figure 12 This is a schematic diagram of a local structure at the extracted unit in this invention;

[0033] Figure 13 This is a schematic diagram of the structure of the L-shaped groove in this invention;

[0034] Figure 14 This is a schematic diagram of the structure of the filter drainage component in this invention.

[0035] Labels in the diagram: 1. Support frame; 2. Mixing unit; 21. Mixing component; 211. Mixing box; 212. Feed hopper; 213. Vertical shaft; 214. Stirring blades; 215. Driven gear; 22. Drive component; 221. Fixed base; 222. Motor; 223. Drive gear; 23. Sedimentation component; 231. Hollow ring; 232. Connecting pipe; 233. Sedimentation box; 234. Connecting hole; 235. Annular valve plate; 236. Movable port; 237. Horizontal bar; 238. Guide hole; 239. Rotary drum; 3. Horizontal frame plate; 4. Extraction unit; 41. Opening and closing component; 411. First electric cylinder 412. Pushing frame; 413. Actuating column; 414. Vertical guide groove; 415. Spiral guide groove; 42. Extraction component; 421. Hollow shell; 422. Through hole; 423. Water outlet pipe; 424. Sealing valve plate; 425. Water outlet hole; 426. Vertical connecting rod; 427. Support plate; 5. Water intake unit; 51. Lifting component; 511. Second electric cylinder; 512. Lifting frame; 513. L-shaped groove; 514. Vertical baffle; 515. Long through port; 52. Filter drainage component; 521. Mounting frame; 522. Filter screen; 523. Sample outlet tube; 6. First measuring cup; 7. Second measuring cup. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] Please refer to the following: Figures 1 to 10An integrated pre-oxidation and coagulation water treatment experimental device includes a support frame 1, a mixing unit 2 mounted on the top of the support frame 1, and an extraction unit 4 and a water intake unit 5 mounted on the mixing unit 2. The extraction unit 4 is used to simultaneously sample multiple groups of wastewater after oxidation treatment by the mixing unit 2. The water intake unit 5 is used to simultaneously extract the supernatant after sedimentation of multiple groups of wastewater, and adjust the extraction height according to the depth of the supernatant. The mixing unit 2 includes a mixing component 21, a driving component 22, and a sedimentation component 23. The mixing component 21 is used to physically separate multiple groups of wastewater samples and to simultaneously mix each group of wastewater samples with the treatment agent. The driving component 22 is used to drive the mixing component 21 to rotate and accelerate the mixing of wastewater and treatment agent. The sedimentation component 23 is used to collect and precipitate the mixed liquid after the mixing treatment is completed.

[0039] In the above, the mixing unit 2 integrates the mixing component 21, the driving component 22, and the sedimentation component 23 to achieve a continuous operation of pre-oxidation, coagulation reaction, and sedimentation separation. There is no need for manual transfer of water samples, which greatly reduces manpower consumption and operation time. The matching setup of the extraction unit 4 and the water intake unit 5 can complete sampling after pre-oxidation and after sedimentation, respectively, and can ensure the synchronization of multiple sets of experiments, reduce experimental errors caused by operational differences, lay the foundation for the accuracy of subsequent detection data, and adapt to different experimental group requirements, thus improving the versatility of the device.

[0040] Furthermore, the mixing component 21 is arranged in a circular array of several groups, and at least three groups. The number of the circular arrays of the mixing component 21 can be flexibly adjusted according to the number of experimental groups to adapt to parallel experiments of different scales. The mixing component 21 includes a mixing box 211. The top of the mixing box 211 is fixedly connected to a feed hopper 212 that communicates with its interior. A vertical shaft 213 is arranged on the inner side of the mixing box 211. The vertical shaft 213 is rotatably connected to the top of the mixing box 211 through a through-hole. Several stirring blades 214 are fixedly sleeved on the outer side of the vertical shaft 213 at equal intervals from bottom to top. A driven gear 215 is fixedly sleeved on the top of the vertical shaft 213.

[0041] In the above, the mixing component 21 adopts a circumferential array design, and the setting of at least three groups meets the basic requirements of parallel experiments. The feed hopper 212 facilitates the addition of sewage, oxidant and coagulant. The vertical shaft 213 drives the multi-layer stirring blades 214 to rotate, which can fully stir the liquid at different depths in the mixing box 211, ensuring that the reagent and sewage are mixed evenly and improving the reaction efficiency. The driven gear 215 cooperates with the driving gear 223 of the driving component 22 to provide power connection for the synchronous operation of multiple mixing components 21, ensuring that the stirring conditions of each group are more consistent.

[0042] Furthermore, the drive component 22 includes a fixed base 221, the side wall of the fixed base 221 is fixedly connected to the outer side wall of the mixing box 211, and a motor 222 is fixedly installed on the top of the fixed base 221. The motor 222 can be an adjustable speed three-phase asynchronous motor. The rotating end of the motor 222 is fixedly connected to a drive gear 223, and the driven gear 215 meshes with the drive gear 223.

[0043] In the above, the fixed base 221 provides stable mounting support for the motor 222. The adjustable speed three-phase asynchronous motor 222 can precisely adjust the speed according to experimental requirements, adapt to the different stirring rate requirements of the pre-oxidation stage and the coagulation stage, and improve the control accuracy of experimental parameters. The driving gear 223 meshes with all driven gears 215 to realize the synchronous operation of multiple mixing components 21 driven by a single motor, avoid the speed deviation caused by the separate control of multiple motors, ensure that the stirring rate and duration of each group of experiments are more consistent, and reduce the dispersion of parallel experimental data.

[0044] Furthermore, the sedimentation component 23 includes a hollow ring 231, which is a ring-shaped structure with a hollow interior. The hollow ring 231 is fixedly connected to the bottom of several mixing tanks 211. A connecting hole 234 is provided through the top of the hollow ring 231, communicating with the bottom outlet of the mixing tank 211. An annular valve plate 235 is rotatably connected to the inner side of the hollow ring 231. The contact surface between the annular valve plate 235 and the inner wall of the hollow ring 231 can be improved by using a rubber sealing gasket. Several guide holes 238 are longitudinally provided on the annular valve plate 235, each corresponding to one of the connecting holes 234. The guide holes 238 are arranged in a circumferential array. Initially, the guide holes 238 and the connecting holes 234 are staggered. The bottom of the hollow ring 231 is fixedly connected to a connecting pipe 232 directly below the connecting hole 234, and one end of the connecting pipe 232 is connected to a sedimentation tank 233. The top of the sedimentation tank 233 is fixedly connected to the bottom of the mixing tank 211. The bottom of the fixed base 221 is rotatably connected to a rotating cylinder 239, which is coaxially arranged with the hollow ring 231. Several horizontal bars 237 are arranged in a circular array on the outer side of the rotating cylinder 239 and fixedly connected to it. The inner side of the hollow ring 231 is provided with movable openings 236 that correspond one-to-one with the horizontal bars 237. The length of the movable openings 236 meets the movement distance requirements of the horizontal bars 237. One end of the horizontal bar 237 passes through the corresponding movable opening 236 and is fixedly connected to the inner wall of the annular valve plate 235.

[0045] In the above-mentioned hollow ring 231, the annular hollow structure provides a unified connection channel for multiple mixing tanks 211 and settling tanks 233, ensuring a more consistent transfer path for the mixed liquid. In the initial state, the guide hole 238 and the connecting hole 234 are staggered, allowing the mixed liquid to be temporarily stored during the stirring stage. The rotating cylinder 239 is coaxially set with the hollow ring 231, and together with the crossbar 237 and the movable port 236, it ensures that the force is uniform and the rotation is smooth when the annular valve plate 235 rotates, achieving precise alignment of the guide hole 238 and the connecting hole 234. This ensures that multiple mixed liquids flow into the settling tank 233 synchronously, controlling the error of the sedimentation start time within the second level, reducing the difference in floc sedimentation caused by time difference, and improving the reliability of experimental data.

[0046] Example 2

[0047] For further details, please refer to [link / reference]. Figures 1 to 13 Based on Embodiment 1, a crossbeam 3 is fixedly connected to the outer side wall of several sedimentation tanks 233. The extraction unit 4 includes an opening and closing component 41 and an extraction component 42. The opening and closing component 41 includes a first electric cylinder 411, which is fixedly installed on the crossbeam 3. A pusher 412 is fixedly connected to the telescopic end of the first electric cylinder 411. A deflecting column 413 is fixedly connected to the top of the pusher 412. A vertical guide groove 414 and a spiral guide groove 415 are provided on the side wall of the rotating drum 239. The top end of the vertical guide groove 414 is connected to the bottom end of the spiral guide groove 415. The deflecting column 413 is slidably disposed in the vertical guide groove 414. Both the vertical guide groove 414 and the spiral guide groove 415 are adapted to the deflecting column 413.

[0048] In the above, the horizontal frame plate 3 provides a stable mounting base for the first electric cylinder 411 and enhances the overall structural stability of the sedimentation tank 233. The first electric cylinder 411 drives the actuating column 413 to move through the push frame 412. The cooperation of the vertical guide groove 414 and the spiral guide groove 415 realizes the conversion of the vertical movement of the actuating column 413 into the rotational movement of the rotating drum 239. The opening and closing of the annular valve plate 235 can be controlled without additional driving force, simplifying the device structure. Moreover, the electric drive mode can accurately control the moving distance and speed, ensuring that the multiple sets of guide holes 238 and connecting holes 234 are synchronously and accurately aligned, avoiding the problem of asynchronous opening and closing caused by manual operation.

[0049] Furthermore, the extraction component 42 includes a hollow shell 421, which is correspondingly arranged with the mixing box 211. The hollow shell 421 is fixedly connected to the outer wall of the corresponding mixing box 211. The hollow shell 421 and the mixing box 211 are provided with a through hole 422 for connecting them. A water outlet pipe 423 communicating with the interior of the hollow shell 421 is fixedly connected to one side of the hollow shell 421. The water outlet pipe 423 is arranged opposite to the through hole 422. The inner side of the hollow shell 421 is sealed with a sliding... A sealing valve plate 424 is dynamically connected. The contact surface between the sealing valve plate 424 and the hollow shell 421 is improved by a rubber sealing gasket. A water outlet hole 425 is horizontally opened through the sealing valve plate 424. Initially, the water outlet hole 425 is staggered from the through hole 422. The sealing valve plate 424 blocks the through hole 422. A vertical connecting rod 426 is fixedly connected to the bottom of the sealing valve plate 424. The bottom end of the vertical connecting rod 426 passes through the hollow shell 421 and is fixedly connected to the top of the push frame 412.

[0050] In the above, the hollow shell 421 corresponds one-to-one with the mixing box 211 to ensure that each group of pre-oxidized water samples are extracted independently to avoid cross-contamination. In the initial state, the water outlet 425 and the through hole 422 are staggered to prevent water sample leakage during the stirring stage. The vertical connecting rod 426 connects the sealing valve plate 424 to the push frame 412, so that the first electric cylinder 411 drives multiple groups of sealing valve plates 424 to open and close synchronously, ensuring that multiple groups of water samples are extracted at the same time, avoiding the time difference caused by manual sampling one by one, preventing the water sample from continuing to react or undergoing floc changes during the waiting process, and improving the accuracy of pre-oxidation effect detection.

[0051] Example 3

[0052] For further details, please refer to [link / reference]. Figures 1 to 14 Based on Embodiment 2, the water intake unit 5 includes a lifting component 51 and a filtration and drainage component 52. The lifting component 51 includes a second electric cylinder 511, which is fixedly installed at the bottom of the crossbeam 3. The telescopic end of the second electric cylinder 511 is fixedly connected to a lifting frame 512, which is located below the sedimentation tank 233. A long through-hole 515 is horizontally opened on one side of the sedimentation tank 233, and two L-shaped troughs 5 are symmetrically arranged on both sides of the long through-hole 515 and fixedly connected to the sedimentation tank 233. 13. A vertical baffle 514 is provided on one side of the sedimentation tank 233 corresponding to the long opening 515. The two sides of the vertical baffle 514 are slidably inserted into the L-shaped groove of the L-shaped trough 513. The side of the vertical baffle 514 near the sedimentation tank 233 is sealed with the sedimentation tank 233 by a fixed rubber sealing gasket. The long opening 515 can be blocked by the vertical baffle 514. The size of the vertical baffle 514 is larger than the size of the long opening 515. The bottom of the vertical baffle 514 is fixedly connected to the top of the lifting frame 512.

[0053] In the above, the second electric cylinder 511 provides a stable driving force for the lifting frame 512, and the L-shaped trough 513 guides the lifting and lowering of the vertical baffle 514 to ensure that the vertical baffle 514 moves vertically. The size of the vertical baffle 514 is larger than that of the long opening 515, ensuring that the long opening 515 is effectively blocked during the lifting and lowering process, preventing the water sample from overflowing from the long opening 515 in the early stage of sedimentation, and ensuring the stability of the sedimentation process.

[0054] Furthermore, the filtration and drainage component 52 includes a mounting frame 521, which is slidably connected to the inner side of the sedimentation tank 233. The outer side wall of the mounting frame 521 is slidably fitted to the inner side wall of the sedimentation tank 233, and a matching rubber sealing ring is nested on the outer side of the mounting frame 521 to ensure the sealing performance at the connection with the inner wall of the sedimentation tank 233. A filter screen 522 is fixedly connected to the inner side of the mounting frame 521. The filter screen 522 is located above the bottom outlet of the connecting pipe 232. A sample outlet pipe 523 is horizontally fixedly connected to the upper part of the vertical baffle 514. One end of the sample outlet pipe 523 passes through the long through-hole 515 and is fixedly connected to the side wall of the mounting frame 521. The top surface of the mounting frame 521 is flush with the inner bottom surface of the sample outlet pipe 523 to ensure that no residue of the upper clear liquid flows into the sample outlet pipe 523.

[0055] In the above, the filter screen 522 is set above the bottom outlet of the connecting pipe 232, which can effectively block the sediment flocs and prevent the turbidity from being too high and the COD detection from being distorted due to the disturbance of the sediment during sampling. The sample outlet pipe 523 is flush with the top surface of the mounting frame 521 to ensure that no residual liquid flows in from the upper layer, thus ensuring the accuracy of the sampling volume. The sample outlet pipe 523 is fixedly connected to the vertical baffle 514 and rises and falls synchronously with the vertical baffle 514, so that the extraction height can be flexibly adjusted according to the depth of the clear liquid in the sedimentation tank 233.

[0056] Furthermore, a tray 427 is fixedly connected between the side walls of two adjacent sedimentation tanks 233, and a first measuring cup 6 is provided on the top of the tray 427.

[0057] In the above, the tray 427 is fixed between adjacent sedimentation tanks 233, providing a stable platform for the first measuring cup 6, and its position corresponds to the water outlet pipe 423, ensuring that the water sample flows accurately into the measuring cup.

[0058] Furthermore, several second measuring cups 7, each corresponding to a sample outlet tube 523, are placed on the top of the lifting frame 512.

[0059] In the above, the lifting frame 512 provides a unified placement platform for the second measuring cup 7, and the second measuring cup 7 corresponds one-to-one with the sample outlet tube 523 to ensure that the clear liquid after each set of sedimentation is collected independently and to avoid cross-contamination.

[0060] Furthermore, both the sedimentation tank 233 and the mixing tank 211 are provided with graduated transparent observation windows on their side walls. The bottom of the sedimentation tank 233 is connected to a drain pipe, and a drain valve is installed on the drain pipe. The motor 222, the first electric cylinder 411 and the second electric cylinder 511 are all electrically connected to an external controller through guides. The motor 222, the first electric cylinder 411 and the second electric cylinder 511 are uniformly electrically controlled by the external controller.

[0061] The working principle of the pre-oxidation coagulation integrated water treatment experimental device provided by this invention is as follows:

[0062] According to the experimental requirements, the wastewater used for the experiment is first thoroughly mixed to ensure that the raw water quality is uniform. Then, it is divided into several groups of water samples (three or more groups) with equal volume using a measuring cup. At the same time, multiple groups of the same type of oxidant are prepared, with the same concentration and dosage of the oxidant in each group. Each group of wastewater samples is poured into the mixing tank 211 through the feed hopper 212 of the corresponding mixing unit 2. One group of prepared oxidant is poured into each mixing tank 211. The motor 222 is started, and the motor 222 drives the drive gear 223 to rotate. The drive gear 223 drives all the driven gears 215 to rotate. The driven gears 215 drive the vertical shaft 213 connected to them to rotate. The vertical shaft 213 drives the stirring blades 214 to rotate, thereby stirring and mixing the wastewater and oxidant in the mixing tank 211 through the stirring blades 214.

[0063] After the wastewater and oxidant are evenly mixed, the first electric cylinder 411 is activated. The telescopic end of the first electric cylinder 411 extends upward, driving the pusher frame 412 and the actuating column 413 to move upward. As the actuating column 413 moves upward along the vertical guide groove 414, the rotating drum 239 remains stationary. Meanwhile, the pusher frame 412 drives the vertical connecting rod 426 to move the sealing valve plate 424 upward. The sealing valve plate 424 slides upward within the hollow shell 421, causing the outlet hole 425 to move upward synchronously. When the outlet hole 425 aligns with the through hole 422, the first electric cylinder 411 is shut off. The sealing valve plate 424 no longer blocks the through hole 422, and the water sample treated with the oxidant in the fixed seat 221 flows out through the through hole 422, the outlet hole 425, and the outlet pipe 423, and flows into... In the first measuring cup 6 corresponding to the outlet end of the water outlet pipe 423, during this process, only a portion of the water sample treated with oxidant in the mixing tank 211 is extracted for testing. Then, the first electric cylinder 411 is started again to extend its telescopic end, driving the sealing valve plate 424 to move upward until the water outlet 425 moves to the top and is offset from the guide hole 422. At this time, the sealing valve plate 424 seals the guide hole 422 again, and the water in the mixing tank 211 stops flowing out. During this process, the actuating column 413 moves from the bottom end of the vertical guide groove 414 to its top end, and the rotating cylinder 239 does not rotate. Then, the first electric cylinder 411 is turned off, and the water sample in the first measuring cup 6 is marked with a number. The pre-oxidation effect is immediately tested by the testing instrument (such as measuring COD, turbidity, etc.), and the test data is recorded in the experimental record.

[0064] Prepare multiple sets of the same type and quantity of coagulant. Then, pour the prepared coagulant into the mixing tank 211 through the feed hopper 212 of each mixing unit 2. Next, start the motor 222, which drives the stirring blades 214 to rotate, mixing the coagulant in the mixing tank 211 with the oxidized wastewater. After uniform mixing, turn off the motor 222 and start the first electric cylinder 411. The telescopic end of the first electric cylinder 411 extends upward, driving the actuating column 413 upward. The actuating column 413 enters the spiral guide groove 415 from the vertical guide groove 414, maintaining its vertical upward movement and cooperating with the spiral guide groove 415. The rotating guide groove 415 guides the rotating drum 239 to rotate. The rotating drum 239 drives the annular valve plate 235 to rotate through the crossbar 237. The rotation of the annular valve plate 235 drives the guide hole 238 to rotate, so that the guide hole 238 is aligned with the connecting hole 234. At this time, the pre-oxidized coagulated water in the mixing tank 211 flows into the sedimentation tank 233 in sequence through the connecting hole 234, the guide hole 238 and the connecting pipe 232 under the action of gravity, so that the sedimentation start time in each set of sedimentation tanks 233 is basically the same. During the sedimentation period, it is forbidden to touch the device to avoid disturbing the sedimentation system. After standing for a period of time, the sediment settles to the bottom of the inner side of the sedimentation tank 233.

[0065] Subsequently, the second electric cylinder 511 is activated. The telescopic end of the second electric cylinder 511 extends downwards, causing the lifting frame 512 to move downwards. The lifting frame 512 then moves all the vertical baffles 514 downwards. The vertical baffles 514 synchronously move the entire filtration and drainage component 52 downwards. As the filtration and drainage component 52 moves downwards, when the filter screen 522 is immersed in the upper clear liquid, the filter screen 522 blocks the lower sediment layer. The upper clear liquid, after being filtered by the filter screen 522, enters above the filter screen 522 and flows out through the sample outlet pipe 523. Based on the depth of the upper clear liquid, the telescopic length of the second electric cylinder 511 is adjusted, causing the filtration and drainage component 52 to gradually move downwards until it approaches the lower sediment layer and stops, thus essentially draining the upper clear liquid. Finally, the liquid flows into the second measuring cup 7 corresponding to the sample outlet pipe 523 for collection. Record the volume of supernatant collected in each group, mark the second measuring cup 7 according to the number, and immediately use a testing instrument to test the coagulation and sedimentation effect (such as measuring the turbidity of the supernatant, COD removal rate, etc.), and record the test data. Compare multiple sets of data to determine whether the deviation of multiple sets of data is within the effective range, and verify the stability of the treatment effect. After the test is completed, open the drain valve at the bottom of the sedimentation tank 233 to discharge the sediment. In this invention, driven by the first electric cylinder 411, the water samples treated by the oxidant in multiple mixing tanks 211 can flow into their corresponding first measuring cup 6 at the same time, and the annular valve plate 235 can be rotated and opened, so that the sewage in the mixing tank 211, after being treated by the oxidant and coagulant, can flow into the corresponding sedimentation tank 233 at the same time for sedimentation, thereby improving the accuracy of the test.

[0066] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A pre-oxidation coagulation integrated water treatment experimental device, comprising a support frame (1), characterized in that, The top of the support frame (1) is equipped with a mixing unit (2), and the mixing unit (2) is equipped with an extraction unit (4) and a water extraction unit (5). The extraction unit (4) is used to simultaneously sample the wastewater after oxidation treatment by multiple mixing units (2); The water intake unit (5) is used to simultaneously extract the supernatant after sedimentation of multiple groups of sewage, and adjust the extraction height according to the depth of the supernatant. The mixing unit (2) includes a mixing component (21), a driving component (22), and a sedimentation component (23). The mixing component (21) is used to physically separate multiple groups of sewage samples and to mix each group of sewage samples with the treatment agent simultaneously. The driving component (22) is used to drive the mixing component (21) to rotate and accelerate the mixing of sewage and treatment agent. The sedimentation component (23) is used to collect and precipitate the mixture after the mixing process is completed.

2. The pre-oxidation coagulation integrated water treatment experimental device according to claim 1, characterized in that, The mixing components (21) are arranged in a circumferential array of several groups. The mixing components (21) include a mixing box (211). The top of the mixing box (211) is fixedly connected to a feed hopper (212) that communicates with its interior. A vertical shaft (213) is arranged on the inner side of the mixing box (211). The vertical shaft (213) is rotatably connected to the top of the mixing box (211) through a through-hole connection. Several stirring blades (214) are fixedly sleeved on the outer side of the vertical shaft (213) at equal intervals from bottom to top. A driven gear (215) is fixedly sleeved on the top of the vertical shaft (213).

3. The pre-oxidation coagulation integrated water treatment experimental device according to claim 2, characterized in that, The drive component (22) includes a fixed base (221), the side wall of the fixed base (221) is fixedly connected to the outer side wall of the mixing box (211), a motor (222) is fixedly installed on the top of the fixed base (221), a drive gear (223) is fixedly connected to the rotating end of the motor (222), and the driven gear (215) meshes with the drive gear (223).

4. The pre-oxidation coagulation integrated water treatment experimental device according to claim 3, characterized in that, The sedimentation component (23) includes a hollow ring (231), which is fixedly connected to the bottom of several mixing tanks (211). The top of the hollow ring (231) has a through hole (234) that communicates with the bottom outlet of the mixing tank (211). The inner side of the hollow ring (231) is sealed and rotatably connected to an annular valve plate (235). The annular valve plate (235) has several guide holes (238) that are longitudinally through it and correspond one-to-one with the through holes (234). The guide holes (238) are arranged in a circumferential array. The bottom of the hollow ring (231) is fixed directly below the through holes (234). A connecting pipe (232) is connected to the interior of the container. One end of the connecting pipe (232) is connected to a sedimentation tank (233). The top of the sedimentation tank (233) is fixedly connected to the bottom of the mixing tank (211). A rotating cylinder (239) is rotatably connected to the bottom of the fixed base (221). Several horizontal bars (237) are arranged in a circular array on the outer side of the rotating cylinder (239) and fixedly connected to it. An movable port (236) corresponding to each horizontal bar (237) is opened through the inner side of the hollow ring (231). One end of the horizontal bar (237) passes through the corresponding movable port (236) and is fixedly connected to the inner wall of the annular valve plate (235).

5. The pre-oxidation coagulation integrated water treatment experimental device according to claim 4, characterized in that, A crossbeam (3) is fixedly connected to the outer side wall of several sedimentation tanks (233). The extraction unit (4) includes an opening and closing component (41) and an extraction component (42). The opening and closing component (41) includes a first electric cylinder (411). The first electric cylinder (411) is fixedly installed on the crossbeam (3). A pusher (412) is fixedly connected to the telescopic end of the first electric cylinder (411). A toggle column (413) is fixedly connected to the top of the pusher (412). A vertical guide groove (414) and a spiral guide groove (415) are provided on the side wall of the rotating drum (239). The top end of the vertical guide groove (414) is connected to the bottom end of the spiral guide groove (415). The toggle column (413) is slidably disposed in the vertical guide groove (414).

6. The pre-oxidation coagulation integrated water treatment experimental device according to claim 5, characterized in that, The extraction component (42) includes a hollow shell (421), which is correspondingly arranged with the mixing tank (211). The hollow shell (421) is fixedly connected to the outer wall of the corresponding mixing tank (211). The hollow shell (421) and the mixing tank (211) are provided with a through hole (422) for connecting them. A water outlet pipe (4) communicating with the interior of the hollow shell (421) is fixedly connected to one side of the hollow shell (421). 23), the water outlet pipe (423) and the through hole (422) are arranged opposite each other. The inner side of the hollow shell (421) is sealed and slidably connected to a sealing valve plate (424). A water outlet hole (425) is opened horizontally through the sealing valve plate (424). A vertical connecting rod (426) is fixedly connected to the bottom of the sealing valve plate (424). The bottom end of the vertical connecting rod (426) passes through the hollow shell (421) and is fixedly connected to the top of the push frame (412).

7. The pre-oxidation coagulation integrated water treatment experimental device according to claim 6, characterized in that, The water intake unit (5) includes a lifting component (51) and a filter drainage component (52); the lifting component (51) includes a second electric cylinder (511), the second electric cylinder (511) is fixedly installed at the bottom of the cross frame plate (3), the telescopic end of the second electric cylinder (511) is fixedly connected to a lifting frame (512), the lifting frame (512) is set below the sedimentation tank (233), a long passage (515) is opened horizontally on one side of the sedimentation tank (233), two L-shaped troughs (513) are symmetrically arranged on both sides of the long passage (515) and fixedly connected to the sedimentation tank (233), a vertical baffle (514) is set on one side of the sedimentation tank (233) corresponding to the long passage (515), the two sides of the vertical baffle (514) are respectively slidably inserted into the L-shaped groove of the L-shaped trough (513), and the bottom of the vertical baffle (514) is fixedly connected to the top of the lifting frame (512).

8. The pre-oxidation coagulation integrated water treatment experimental device according to claim 7, characterized in that, The filter drainage component (52) includes a mounting frame (521), which is slidably connected to the inner side of the sedimentation tank (233). The outer side wall of the mounting frame (521) is slidably attached to the inner side wall of the sedimentation tank (233). A filter screen (522) is fixedly connected to the inner side of the mounting frame (521). A sample outlet pipe (523) is horizontally fixedly connected to the upper part of the vertical baffle (514). One end of the sample outlet pipe (523) passes through the long opening (515) and is fixedly connected to the side wall of the mounting frame (521).

9. The pre-oxidation coagulation integrated water treatment experimental device according to claim 3, characterized in that, A tray (427) is fixedly connected between the side walls of two adjacent sedimentation tanks (233), and a first measuring cup (6) is provided on the top of the tray (427).

10. The pre-oxidation coagulation integrated water treatment experimental device according to claim 7, characterized in that, The top of the lifting frame (512) has several second measuring cups (7) that correspond one-to-one with the sample outlet tube (523).

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