Flocculation mechanism for adding medicine to heavy metal wastewater

Abstract

The utility model relates to the technical field of heavy metal wastewater treatment, and discloses a flocculation mechanism for dosing heavy metal wastewater, which is characterized in that a premixing dosing mechanism is positioned on the outer side of a flocculation basin, and water and a medicament are mixed in a station external dosing manner and then are added into the flocculation basin through a dosing pipeline; the premixing and dosing mechanism comprises a PE (polyethylene) medicine box, an electromagnetic diaphragm metering pump and a pipeline mixer; a stirrer for stirring a medicament to prevent precipitation is inserted into the PE medicine box; the electromagnetic diaphragm metering pump provides power for dosing, and a liquid inlet pipeline on the electromagnetic diaphragm metering pump is communicated with a liquid suction pipe inserted into the PE medicine box; the pipeline mixer is used for mixing chemicals with water, and a chemical feeding opening in the pipeline mixer is communicated with a liquid outlet pipeline of the electromagnetic diaphragm metering pump. Through precise chemical control of the electromagnetic diaphragm metering pump and reinforced premixing of the pipeline mixer, automatic regulation of chemical dosage and efficient reaction are realized, and compared with a traditional process, the chemical waste rate is reduced, and the flocculation efficiency is improved; the roller shaft assists in feeding, so that time consumed by manual medicine box replacement is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of heavy metal wastewater treatment technology, specifically relating to a flocculation mechanism for adding medicine to heavy metal wastewater. Background Technology

[0002] In the field of heavy metal wastewater treatment, flocculation sedimentation is widely used due to its mature technology. In traditional treatment, a PE chemical tank is usually placed on the top support of the flocculation tank, and the chemical is added by gravity flow by manually opening the dosing valve. The mixing of the chemical and the wastewater also relies on the natural diffusion of the water flow in the tank. With the increasing environmental protection requirements and the growing demand for automated treatment, this process has gradually revealed many shortcomings.

[0003] The addition of chemicals relies on manual valve adjustment of the gravity flow rate, which cannot be precisely controlled according to water quality and quantity. Changes in the liquid level in the chemical tank also cause flow fluctuations, resulting in both chemical waste and unstable treatment effects. Frequent manual replacement of the limited-capacity chemical tank is labor-intensive, and since many chemicals are corrosive, there are safety hazards in the operation. Adding chemicals directly into the tank results in low mixing efficiency and the formation of "chemical clumps," leading to small flocs and slow sedimentation, which is difficult to meet the needs of treating high-concentration wastewater.

[0004] In view of this, we propose a flocculant mechanism for treating heavy metal wastewater with pharmaceuticals to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the technical problems of the prior art, which relies on manual gravity dosing, where the flow rate of the agent fluctuates greatly due to the influence of the liquid level, resulting in uncontrollable dosage and serious waste; and the high labor intensity of frequent manual replacement of the medicine tank.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flocculant system for treating heavy metal wastewater with pharmaceutical applications includes:

[0008] A premixed dosing system, located outside the flocculation tank, mixes water and chemicals externally and then adds the mixture to the flocculation tank via a dosing pipeline; the premixed dosing system includes:

[0009] The PE medicine box is replaceable and placed on a stand. The top opening of the PE medicine box has a stirrer that extends into the PE medicine box to stir the medicine and prevent sedimentation.

[0010] The electromagnetic diaphragm metering pump provides power for drug dosing. The inlet pipe of the electromagnetic diaphragm metering pump is connected to the suction pipe inserted into the PE drug tank.

[0011] A pipeline mixer is used to mix chemicals with water. The pipeline mixer is equipped with a water inlet and a chemical dosing port, which is connected to the outlet pipeline of an electromagnetic diaphragm metering pump.

[0012] Preferably, the PE medicine box is equipped with a filling port with a screw-on sealing cap A, and a positioning socket for inserting a suction tube.

[0013] A sealing block can be fastened to the socket to seal it, and the top opening of the PE medicine box can be sealed by the fastened sealing block.

[0014] Preferably, the base of the bracket is provided with a support plate for stable placement of the PE medicine box and several rollers arranged at equal intervals on the outside of the support plate. The rollers are used to assist in feeding the PE medicine box onto the support plate.

[0015] Preferably, the bracket is provided with an arc-shaped limiting plate at the top of the support plate to match the positioning of the PE medicine box. The bracket is provided with a door frame that can be opened and closed to position the PE medicine box against the arc-shaped limiting plate. A sponge block is glued to the inner side of the door frame to press and position the PE medicine box when it is closed.

[0016] One side of the door frame is hinged to the bracket, and the other side is fastened to the bracket by a latch.

[0017] Preferably, the agitator includes a stirring motor mounted on the mounting frame, a stirring shaft fixedly connected to the output shaft of the stirring motor, and stirring blades provided on the stirring shaft. The top of the bracket is provided with a downward cylinder that pushes the agitator down. The piston rod end of the downward cylinder is fixedly connected to the top of the mounting frame. After the mounting frame is moved down, its bottom seals the top opening of the PE medicine box.

[0018] Preferably, a stepped frame is provided on one side of the support, on which the electromagnetic diaphragm metering pump and the pipeline mixer are respectively mounted and fixed. The pipeline mixer is fixed to the stepped frame on both sides by pipe clamps.

[0019] Preferably, the pipeline mixer is equipped with a pressure gauge.

[0020] As a preferred option, a valve is installed on the water inlet pipe.

[0021] Preferably, the top of the flocculation tank is provided with a horizontal support, on which a motor frame is installed, and a geared motor that drives the stirring rod to rotate is installed on the motor frame.

[0022] Preferably, the suction tube is inserted into the bottom of the PE medicine box, and the suction port of the suction tube is located near the bottom wall of the PE medicine box but does not contact the bottom wall of the PE medicine box.

[0023] Compared with the prior art, the technical effects and advantages of this utility model are:

[0024] (1) The flocculation mechanism for heavy metal wastewater treatment adopts an off-site dosing mode. The premixed dosing mechanism is located outside the flocculation tank. The agent is drawn from the PE tank by an electromagnetic diaphragm metering pump, and after being uniformly mixed with the water introduced by the inlet pipe in the pipeline mixer, it is injected into the flocculation tank through the dosing pipeline. The agitator on the top of the PE tank is pushed down by a downward cylinder, which continuously stirs the agent while sealing the opening of the tank to prevent sedimentation. The roller on the support assists in feeding the tank, and the arc-shaped limit plate cooperates with the door frame to position the tank, ensuring a stable connection between the suction pipe and the metering pump. In addition, the geared motor at the top of the flocculation tank drives the stirring rod to rotate, further enhancing the mixing reaction between the agent and the wastewater.

[0025] (2) Compared with the traditional gravity dosing method, the electromagnetic diaphragm metering pump can accurately adjust the flow rate of the agent and monitor the pipeline pressure in real time with the pressure gauge, so as to realize the dynamic adjustment of the dosing amount according to the wastewater quality. This solves the problem of uncontrollable agent dosing in the traditional process and avoids agent waste or insufficient dosing.

[0026] (3) The pipeline mixer and the stirring rod in the flocculation tank form a dual mixing system, which changes the traditional mixing method that relies on the natural diffusion of water flow. This allows the reagent to come into more full contact with heavy metal ions, accelerates the reaction process, improves the floc formation effect, and enhances the flocculation and sedimentation efficiency.

[0027] (4) The roller-assisted feeding and door frame positioning design simplifies the tank replacement process and reduces the difficulty of manual handling; the continuous anti-settling function of the agitator reduces drug residue and lowers the risk of pipeline blockage. Meanwhile, the external dosing system combined with a sealed design avoids direct contact between the drug and operators, eliminating the risk of leakage. The modular equipment installation also facilitates later maintenance and repair. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the existing technology;

[0029] Figure 2 This is a schematic diagram of the structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the premixed dosing mechanism of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the premixed dosing mechanism of this utility model after the upper door frame is opened;

[0032] Figure 5 This is a schematic diagram of the structure of the PE medicine box of this utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the pipeline mixer of this utility model.

[0034] In the diagram: 1. Premixed dosing mechanism; 2. Flocculation tank; 3. Dosing pipeline; 4. PE chemical tank; 401. Opening; 402. Sealing cap A; 403. Filling port; 404. Insert; 405. Sealing block; 406. Blocking block; 5. Bracket; 501. Support plate; 502. Roller; 503. Arc-shaped limiting plate; 504. Door frame; 505. Sponge block; 506. Lock; 507. Stepped frame; 6. Electromagnetic diaphragm meter 7. Metering pump; 8. Pipeline mixer; 9. Inlet pipe; 10. Dosing port; 11. Pipe clamp; 12. Pressure gauge; 13. Valve; 14. Agitator; 15. Agitator motor; 16. Agitator shaft; 17. Agitator blades; 18. Liquid inlet pipe; 19. Suction pipe; 10. Liquid outlet pipe; 18. Downward cylinder; 19. Mounting frame; 10. Horizontal support; 11. Motor frame; 12. Agitator rod; 13. Gear motor. Detailed Implementation

[0035] 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.

[0036] The following combination Figures 2 to 6 This application will be described in further detail.

[0037] This application discloses a flocculation mechanism for adding chemicals to heavy metal wastewater, including a premixed dosing mechanism 1. The premixed dosing mechanism 1 is located outside the flocculation tank 2 and mixes water and chemicals in an off-site dosing manner before adding them to the flocculation tank 2 through a dosing pipe 3.

[0038] The premixed dosing mechanism 1 includes a PE medicine tank 4, an electromagnetic diaphragm metering pump 6, and a pipeline mixer 7. The PE medicine tank 4 is replaceably placed on a support 5. The electromagnetic diaphragm metering pump 6 provides power for dosing. The pipeline mixer 7 is used to mix the medicine with water. The inlet pipe 9 on the electromagnetic diaphragm metering pump 6 is connected to the suction pipe 10 inserted into the PE medicine tank 4. The dosing port 702 on the pipeline mixer 7 is connected to the outlet pipe 11 of the electromagnetic diaphragm metering pump 6. The suction pipe 10 is inserted into the bottom of the PE medicine tank 4, and the suction port of the suction pipe 10 is set close to the bottom wall of the PE medicine tank 4 but does not contact the bottom wall of the PE medicine tank 4.

[0039] An off-site dosing method is adopted. The premixed dosing mechanism 1 (PE chemical tank, electromagnetic diaphragm metering pump 6, and pipeline mixer 7) mixes the chemicals with water, which is then added to the flocculation tank 2 via pipeline. The suction pipe 10 is inserted into the bottom of the PE chemical tank, close to the bottom wall. The electromagnetic diaphragm metering pump 6 can precisely control the chemical flow rate, solving the problem of "uncontrollable" chemicals in traditional methods and avoiding waste or insufficient dosing. Frequent replacement of the PE chemical tank by operators is unnecessary; continuous dosing via the metering pump reduces labor intensity. The pipeline mixer 7 ensures uniform premixing of chemicals and water, improving flocculation efficiency and making it easier to combine with heavy metal ions in wastewater compared to traditional direct dosing. The suction pipe 10, located near the bottom of the PE chemical tank, maximizes the extraction of chemicals, reducing residue and waste.

[0040] The PE medicine tank 4 is equipped with a filling port 403 with a screw-on sealing cap A402, and a positioning socket 404 for inserting the suction tube 10. A sealing block 405 for sealing the socket 404 can be fastened to the socket 404, and the top opening 401 of the PE medicine tank 4 can be sealed by the fastened sealing block 406. The top opening 401 of the PE medicine tank 4 passes through a stirrer 8 that extends into the PE medicine tank 4 to stir the medicine and prevent sedimentation; the stirrer 8 includes a stirring motor 801 mounted on the mounting frame 13, a stirring shaft 802 fixedly connected to the output shaft of the stirring motor 801, and stirring blades 803 on the stirring shaft 802. The top of the bracket 5 is equipped with a downward cylinder 12 that pushes the stirrer 8 downward. The piston rod end of the downward cylinder 12 is fixedly connected to the top of the mounting frame 13. After the mounting frame 13 is lowered, its bottom seals the top opening 401 of the PE medicine tank 4.

[0041] The PE medicine tank is equipped with a filling port 403, an insertion port 404, and a sealing block 405. The top opening 401 can be sealed. The sealing design of the filling port 403 and insertion port 404 prevents the evaporation or leakage of the medicine, avoiding environmental pollution and safety hazards. The top sealing block 406 ensures that the medicine is not contaminated by the outside world during the dosing process. The agitator 8 (agitator motor 801, shaft, and blades) is pushed down by the downward cylinder 12 to seal the top opening 401 and agitate the medicine. The agitator 8 continuously agitates the medicine to prevent the precipitation of solid particles or high-concentration medicine, ensuring uniform medicine concentration and avoiding fluctuations in the dosing effect due to precipitation. The downward cylinder pushes the agitator 8 down and seals the opening 401, realizing an integrated operation of "installation-sealing-aggregation", reducing manual intervention and improving the stability of equipment operation.

[0042] The base of the bracket 5 is provided with a support plate 501 for stable placement of the PE medicine box 4, and several rollers 502 arranged at equal intervals on the outer side of the support plate 501. The rollers 502 are used to assist in feeding the PE medicine box 4 onto the support plate 501. The bracket 5, located at the top of the support plate 501, is provided with an arc-shaped limiting plate 503 for limiting the PE medicine box 4. The bracket 5 is provided with a door frame 504 that can be opened and closed to position the PE medicine box 4 against the arc-shaped limiting plate 503. One side of the door frame 504 is hinged to the bracket 5, and the other side is fastened to the bracket 5 by a latch 506. A sponge block 505 is glued to the inner side of the door frame 504 to press and position the PE medicine box 4 when it is closed.

[0043] The roller 502 assists in the sliding feeding of the PE medicine tank, reducing the difficulty of manual handling, especially suitable for heavy-duty medicine tanks, and improving replacement efficiency. The arc-shaped limiting plate 503 cooperates with the door frame 504, and the sponge block 505 presses the PE medicine tank firmly to prevent it from shaking during stirring or adding medicine, ensuring the stability of the connection between the suction pipe 10 and the metering pump. The sponge block 505 buffers the pressure of the door frame 504 on the medicine tank, avoiding damage to the medicine tank due to hard impacts and extending its service life.

[0044] The pipeline mixer 7 is equipped with an inlet pipe 701, a valve 705, and a pressure gauge 704. A stepped frame 507 is located on one side of the support 5. The electromagnetic diaphragm metering pump 6 and the pipeline mixer 7 are respectively mounted and fixed on the stepped frame 507. Both sides of the pipeline mixer 7 are fixed to the stepped frame 507 by pipe clamps 703.

[0045] Pressure gauge 704 displays the real-time pressure inside the mixer, allowing operators to easily determine if the pipeline is blocked or if the mixing effect is normal, and to adjust operating parameters in a timely manner. A stepped frame 507 secures the electromagnetic diaphragm metering pump 6 and the pipeline mixer 7, making efficient use of space. Pipe clamp 703 further ensures a stable pipeline connection and prevents leakage caused by vibration. Inlet pipe 701 and valve 705 adjust the water flow, working in conjunction with the metering pump to control the chemical-water mixing ratio, flexibly adapting to the treatment needs of heavy metal wastewater with different concentrations.

[0046] The top of the flocculation tank 2 is equipped with a horizontal support 14, on which a motor frame 15 is mounted. A geared motor 17, which drives the stirring rod 16, is mounted on the motor frame 15. The stirring rod 16 rotates within the flocculation tank 2, pushing the premixed reagent into full contact with the wastewater, accelerating the reaction between heavy metal ions and the flocculant, forming larger flocs, and improving the sedimentation effect. The horizontal support 14 and the motor frame 15 fix the geared motor 17, ensuring stable equipment operation during stirring and reducing noise and vibration.

[0047] The equipment selection recommendations for electromagnetic diaphragm metering pump 6, pipeline mixer 7, pressure gauge 704, stirring motor 801, and geared motor 17 are shown in Table 1 below;

[0048] Table 1 Equipment Selection Table

[0049]

[0050] The premixed dosing mechanism 1 of the heavy metal wastewater dosing flocculation system draws chemicals from the PE chemical tank outside the flocculation tank 2 via an electromagnetic diaphragm metering pump 6. The chemicals are then mixed proportionally with water introduced through the inlet pipe 701 via a pipeline mixer 7 to form a uniform solution, which is then injected into the flocculation tank 2 through the dosing pipe 3. The agitator 8 at the top of the PE chemical tank is pushed downwards by a downward cylinder 12, simultaneously sealing the tank opening 401 and agitating the chemicals to prevent sedimentation. The roller 502 on the support 5 assists in loading the chemical tank, and the arc-shaped limiting plate 503 cooperates with the door frame 504 to position the chemical tank, ensuring a stable connection of the suction pipe 10. The geared motor 17 at the top of the flocculation tank 2 drives the stirring rod 16 to rotate, enhancing the mixing reaction between the chemicals and the wastewater.

[0051] The electromagnetic diaphragm metering pump 6 of the flocculation mechanism for heavy metal wastewater treatment replaces the traditional gravity-flow dosing, enabling precise regulation of the reagent flow rate. Combined with the pressure gauge 704 to monitor pipeline pressure, the dosage can be adjusted in real time according to the wastewater quality, reducing reagent waste. The pipeline mixer 7 and the stirring rod 16 of the flocculation tank 2 form a dual mixing system. Compared with traditional natural diffusion, the reaction efficiency of the reagent and heavy metal ions is improved, the floc particle size is increased, and the sedimentation time is shortened.

[0052] In terms of ease of operation and equipment maintenance, the mechanism shortens the tank replacement time and reduces manual labor intensity through designs such as roller feeding (502) and door frame positioning (504). The continuous anti-settling design of the agitator (8) effectively reduces the residual rate of the reagent and the frequency of pipeline blockage. In addition, the off-site dosing method avoids direct contact between the reagent and the operator, and the sealing design eliminates the risk of leakage. At the same time, the modular installation of the stepped frame (507) facilitates equipment maintenance, and the overall operation and maintenance cost is lower than that of traditional processes.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flocculant mechanism for treating heavy metal wastewater with pharmaceuticals, characterized in that, include: A premixed dosing unit (1) is located outside the flocculation tank (2) and mixes water and chemicals outside the station before adding them to the flocculation tank (2) through a dosing pipe (3); the premixed dosing unit (1) includes: The PE medicine box (4) is replaceably placed on the support (5). The top opening (401) of the PE medicine box (4) passes through a stirrer (8) that extends into the PE medicine box (4) to stir the medicine and prevent sedimentation. The electromagnetic diaphragm metering pump (6) provides power for drug dosing. The inlet pipe (9) on the electromagnetic diaphragm metering pump (6) is connected to the suction pipe (10) inserted into the PE medicine tank (4). The pipeline mixer (7) is used to mix the agent with water. The pipeline mixer (7) is equipped with a water inlet pipe (701) and a dosing port (702). The dosing port (702) is connected to the liquid outlet pipe (11) of the electromagnetic diaphragm metering pump (6).

2. The flocculant mechanism for treating heavy metal wastewater with pharmaceuticals according to claim 1, characterized in that: The PE medicine box (4) is equipped with a filling port (403) with a screw-on sealing cap A (402) and a positioning socket (404) for inserting the suction tube (10).

3. The flocculant mechanism for treating heavy metal wastewater with pharmaceuticals according to claim 1, characterized in that: The base of the bracket (5) is provided with a support plate (501) for stable placement of the PE medicine box (4) and several rollers (502) arranged at equal distances on the outside of the support plate (501). The rollers (502) are used to assist the PE medicine box (4) in feeding material onto the support plate (501).

4. The flocculation mechanism for adding pharmaceuticals to heavy metal wastewater according to claim 3, characterized in that: An arc-shaped limiting plate (503) is provided on the bracket (5) and at the top of the support plate (501) to limit the PE medicine box (4). A door frame (504) is provided on the bracket (5) that can be opened and closed to position the PE medicine box (4) against the arc-shaped limiting plate (503). A sponge block (505) is glued to the inner side of the door frame (504) to press and position the PE medicine box (4) when it is closed.

5. The flocculation mechanism for adding pharmaceuticals to heavy metal wastewater according to claim 1, characterized in that: The top of the support (5) is equipped with a downward cylinder (12) that pushes the stirrer (8) down.

6. The flocculation mechanism for adding pharmaceuticals to heavy metal wastewater according to claim 1, characterized in that: A stepped frame (507) is provided on one side of the bracket (5), and the electromagnetic diaphragm metering pump (6) and the pipeline mixer (7) are respectively installed and fixed on the stepped frame (507).

7. The flocculation mechanism for adding pharmaceuticals to heavy metal wastewater according to claim 1, characterized in that: The pipeline mixer (7) is equipped with a pressure gauge (704).

8. The flocculant mechanism for treating heavy metal wastewater with pharmaceuticals according to claim 1, characterized in that: A valve (705) is installed on the water inlet pipe (701).

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