An acidic heavy metal wastewater treatment and recovery device

Abstract

This invention relates to the field of wastewater treatment technology, and more particularly to an acidic heavy metal wastewater treatment and recovery device, comprising a sedimentation tank with an open bottom, a wastewater inlet pipe and a reagent addition pipe on one side of the sedimentation tank, and a fixed support inside the sedimentation tank; a mixing mechanism, mounted on the fixed support, for thoroughly mixing the wastewater and reagent entering the sedimentation tank; and a cleaning mechanism, located at the open bottom of the sedimentation tank, for cleaning settled impurities that have remained in the sedimentation tank and reacted with the reagent. This invention, through its cleaning mechanism, can transport settled impurities that have remained on the conveyor belt and reacted with the reagent into the inner cavity of the side support block through the inlet. Simultaneously, the piston movement of the piston plate inside the negative pressure chamber connected to the outside of the collection chamber draws impurities into the collection chamber through the negative pressure channel for collection; it also achieves mixing without the need for an electric motor.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an acidic heavy metal wastewater treatment and recovery device. Background Technology

[0002] Acidic heavy metal wastewater typically originates from industries such as mining, metal smelting, electroplating, and battery manufacturing. This wastewater contains high concentrations of acidic substances (such as sulfuric acid and nitric acid) and heavy metal ions (such as copper, lead, zinc, cadmium, and mercury), posing a significant threat to the environment and human health. It can pollute water bodies and soil, impact ecosystems, and potentially accumulate through the food chain, ultimately affecting humans. Therefore, the treatment of acidic heavy metal wastewater is essential. The treatment process involves mixing flocculants into the wastewater to induce precipitation reactions, thereby separating some of the acidic or heavy metal substances.

[0003] However, the sedimentation residue and impurities produced during the filtration process after the chemical reaction of the wastewater will remain in the sedimentation tank, which requires the sedimentation tank to be cleaned from time to time. Manual removal of the residue and impurities is a labor-intensive operation, resulting in poor wastewater treatment effect.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an acidic heavy metal wastewater treatment and recovery device.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an acidic heavy metal wastewater treatment and recovery device, including a sedimentation tank with an open bottom, a wastewater inlet pipe and a reagent dosing pipe provided on one side of the sedimentation tank, and a fixed support provided inside the sedimentation tank;

[0007] A mixing mechanism, mounted on the fixed support, is used to thoroughly mix the wastewater and reagents entering the sedimentation tank.

[0008] A cleaning mechanism is installed at the bottom opening of the sedimentation tank to clean the sedimentation impurities that remain in the sedimentation tank and react with the reagents.

[0009] Furthermore, the cleaning mechanism includes a conveyor belt horizontally arranged at the bottom opening of the sedimentation tank. A side support block is disposed on one side of the upper part of the conveyor belt. Several inlets for passing sedimented impurities are evenly arranged on one side of the side support block. A movable baffle for opening and closing the inlets is provided in the inner cavity of the side support block. A collection cavity communicating with the outer wall of the sedimentation tank is provided on the other side of the inner cavity of the side support block opposite to the movable baffle.

[0010] Furthermore, a negative pressure chamber is connected to the outside of the collection chamber, and a piston plate is slidably limited inside the negative pressure chamber. A lead screw extending to the outside is movably provided on the end face of the piston plate.

[0011] Furthermore, a motor-driven drive roller is provided on one side of the conveyor belt, and one end of the drive roller extends through the wall of the sedimentation tank to the outside and is connected to the lead screw to be provided with a belt conveyor unit.

[0012] Furthermore, the inner cavity of the side support block is provided with a channel communicating with the inside of the collection cavity.

[0013] Furthermore, the mixing mechanism includes a rotating wheel vertically disposed within the fixed support, a drive shaft disposed on the end face of the rotating wheel, a worm section disposed at both ends of the drive shaft, a worm wheel meshing with the sides of both worm sections, and a stirring blade for mixing wastewater and reagent disposed at the center of the end face of the worm wheel.

[0014] Furthermore, the circumferential edge of the rotor is uniformly provided with several concave water hopper structures that resemble water ladles, and the center extension lines of the wastewater inlet pipe and the reagent dispensing pipe coincide with the center point of the corresponding water hopper structure.

[0015] Furthermore, the bottom of the sedimentation tank is open and equipped with a water collection hopper for collecting the wastewater after sedimentation and separation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The cleaning mechanism of the present invention can transport the sedimented impurities that remain on the conveyor belt and have undergone chemical reaction into the inner cavity of the side support block through the inlet. Simultaneously, the piston movement of the piston plate inside the negative pressure chamber connected to the outside of the collection chamber draws the impurities into the collection chamber for collection through the negative pressure channel. Furthermore, the mixing mechanism utilizes the jet impact from the wastewater inlet pipe and the chemical addition pipe onto the rotating wheel, driving the rotating wheel to rotate, which in turn drives the stirring blades to rotate inside the sedimentation tank. This achieves thorough mixing of the wastewater and chemicals added inside the sedimentation tank. It requires no electric drive, is energy-saving and environmentally friendly, and improves power efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 This is a cross-sectional view of an embodiment of the present invention.

[0019] Figure 2 This is a perspective view of the overall structure of an embodiment of the present invention;

[0020] Figure 3 This is a three-dimensional cross-sectional view of an embodiment of the present invention;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a three-dimensional structural view of another cross-section of an embodiment of the present invention.

[0023] In the diagram: 1. Sedimentation tank; 2. Wastewater inlet pipe; 3. Chemical dosing pipe; 4. Fixed support; 5. Mixing mechanism; 51. Rotary wheel; 52. Drive shaft; 53. Worm gear; 54. Worm wheel; 55. Stirring blades; 6. Cleaning mechanism; 61. Conveyor belt; 611. Drive roller; 62. Side support block; 621. Inlet; 622. Channel; 63. Movable baffle; 64. Collection chamber; 641. Negative pressure chamber; 642. Piston plate; 643. Lead screw; 65. Belt conveyor unit. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0026] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0027] like Figure 1-5 As shown, the present invention provides a wastewater treatment and recycling device for the treatment and recycling of acidic heavy metal wastewater. It includes a sedimentation tank 1 with an open bottom, a wastewater inlet pipe 2 and a reagent dosing pipe 3 on one side of the sedimentation tank 1, and a fixed support 4 inside the sedimentation tank 1.

[0028] The mixing mechanism 5 is mounted on the fixed support 4 and is used to thoroughly mix the wastewater and reagents entering the sedimentation tank 1.

[0029] The cleaning mechanism 6 is located at the bottom opening of the sedimentation tank 1 and is used to clean the sedimentation impurities that remain in the sedimentation tank 1 and react with the reagent.

[0030] In specific implementation, wastewater inlet pipe 2 and reagent inlet pipe 3 are respectively inserted into two holes machined on one side of the support surface of the sedimentation tank 1. A mixing mechanism 5 fixed inside the sedimentation tank 1 by a fixed bracket 4 and a cleaning mechanism 6 installed at the bottom opening of the sedimentation tank 1 are also included. On the one hand, the mixing mechanism 5 can achieve the mixing and sedimentation reaction of wastewater and reagent inside the sedimentation tank 1 without power drive. On the other hand, after the sedimentation reaction stops, the sedimented impurities that have reacted with the reagent and are retained on the conveyor belt 61 of the cleaning mechanism 6 are transported by the power of the conveyor belt 61 to achieve the effect of agglomeration and collection, which improves the convenience of cleaning and the efficiency of wastewater treatment.

[0031] It should be noted that a flange for connecting the wastewater discharge pipe is welded to the outer end of the wastewater inlet pipe 2, and a chemical cylinder is installed at the outer end of the chemical filling pipe 3. The chemical cylinder contains chemical agents that react with the sedimentation of acidic or heavy metal substances in the wastewater.

[0032] It should be noted that nozzles with pressurized delivery are installed at the ends of the wastewater inlet pipe 2 and the reagent addition pipe 3 near the mixing mechanism 5.

[0033] In one embodiment, the cleaning mechanism 6 includes a conveyor belt 61 horizontally arranged at the bottom opening of the sedimentation tank 1. A side support block 62 is disposed on one side of the upper part of the conveyor belt 61. Several inlets 621 for passing sedimented impurities are evenly arranged on one side of the side support block 62. A movable baffle 63 for opening and closing the inlets 621 is provided in the inner cavity of the side support block 62. A collection cavity 64 communicating with the outer wall of the sedimentation tank 1 is provided on the other side of the inner cavity of the side support block 62 opposite to the movable baffle 63. This design utilizes a conveyor belt 61 horizontally installed at the bottom of the sedimentation tank 1, with a side support block 62 welded to the inner wall of the sedimentation tank 1, which contacts the upper part of the conveyor belt 61. During the process of the conveyor belt 61 being powered to transport materials to one side, the movable baffle 63 can be longitudinally pulled out to deviate from the corresponding baffle plate integrally formed on the movable baffle 63 at the inlet 621. This allows the side support block 62 to form internal and external passages through several evenly distributed inlets 621, facilitating the entry of sedimented impurities retained on the conveyor belt 61 into the side support block 62 via the inlets 621. Simultaneously, the piston movement of the piston plate 642 inside the negative pressure chamber 641, which is connected to the outside of the collection chamber 64, draws impurities through the negative pressure of the channel 622 into the collection chamber 64 for collection.

[0034] In one embodiment, a negative pressure chamber 641 is connected to the outer side of the collection chamber 64. A piston plate 642 is slidably limited inside the negative pressure chamber 641, and a lead screw 643 extending to the outside is movably provided on the end face of the piston plate 642. With this design, the piston plate 642, which is limited and moved within a groove machined inside the negative pressure chamber 641 and rotated by the lead screw 643, will drive the piston plate 642, which is threaded and rotated on it, to make linear motion within the groove machined on one end face of the negative pressure chamber 641. This expands the cavity on one side of the negative pressure chamber 641 separated by the piston plate 642, allowing the negative pressure inside the collection chamber 64 connected to that side to draw impurities into the side support block 62.

[0035] It should be noted that a filter screen with dust-proof filtering function is embedded in the through-hole machined on one side of the common side of the collection chamber 64 and the negative pressure chamber 641 to prevent impurities from entering the interior of the negative pressure chamber 641 and affecting the movement of the piston plate 642.

[0036] In one embodiment, a motor-driven drive roller 611 is provided on one side of the conveyor belt 61. One end of the drive roller 611 extends through the wall of the sedimentation tank 1 and connects to the lead screw 643, where a belt conveyor unit 65 is provided. This design, by fixing two pulleys at the ends of the drive roller 611 and the lead screw 643 respectively, and having the same transmission belt wound around the two pulleys, allows the drive roller 61, driven by a motor connected to one end via a coupling, to move the conveyor belt 61 wound on it towards the side support block 62 under the rotational support of an auxiliary roller on the opposite side. Simultaneously, the pulleys on the outer end of the drive roller 611 and the transmission belt wound around them transmit power to the lead screw 643 and the pulleys on the outer end of the lead screw 643, achieving power transmission and resulting in good performance.

[0037] In one embodiment, the inner cavity of the side support block 62 is provided with a channel 622 communicating with the inside of the collection chamber 64. This design allows the channel 622, with its arc-shaped structure, to form a smooth guiding surface by machining the inner cavity of the side support block 62, thus allowing sedimentation impurities from the pharmaceutical reaction inside the side support block 62 to enter the collection chamber 64 via the channel 622.

[0038] In one embodiment, the mixing mechanism 5 includes a rotating wheel 51 vertically disposed within the fixed support 4. A drive shaft 52 is disposed on the end face of the rotating wheel 51. A worm gear 53 is disposed at both ends of the drive shaft 52. A worm wheel 54 is meshed on the side of each of the two worm gear 53. A stirring blade 55 for mixing wastewater and reagents is disposed at the center of the end face of the worm wheel 54. This design, with the rotating wheel 51 vertically installed inside the fixed bracket 4, and the drive shaft 52 fixedly inserted through the center of the end face of the rotating wheel 51 and the worm gear 53 welded to both ends of the drive shaft 52, generates a rotational force when the rotating wheel 51 rotates. This force is transmitted to the worm gear 53 through the drive shaft 52, which in turn drives the worm wheel 54 meshing with the side of the worm gear 53 to rotate. This allows the stirring blades 55 sleeved on the end face of the worm wheel 54 to fully mix and react with the reagents in the added wastewater inside the sedimentation tank 1, thereby achieving the chemical sedimentation of acidic or heavy metal substances in the wastewater. The effect is good.

[0039] In one embodiment, the circumferential edge of the rotating wheel 51 is uniformly provided with several concave, ladle-shaped water bucket structures, and the center extension lines of the wastewater inlet pipe 2 and the reagent dispensing pipe 3 coincide with the center point of the corresponding water bucket structure. This design, by uniformly welding several concave, ladle-shaped water bucket structures to the circumferential edge of the rotating wheel 51, and with the center extension lines of the wastewater inlet pipe 2 and the reagent dispensing pipe 3 coinciding with the center point of the water bucket structure, allows the rotating wheel 51 to rotate within the support area of ​​the fixed bracket 4 when the jets from the nozzles at the ends of the wastewater inlet pipe 2 and the reagent dispensing pipe 3 impact the water bucket structures. This provides rotational power without electric drive, saving energy and being environmentally friendly.

[0040] In one embodiment, the bottom opening of the sedimentation tank 1 is equipped with a water collection hopper for collecting the wastewater after sedimentation and separation. This design allows the wastewater after sedimentation and separation to be guided and transported to a wastewater recovery tank via the detachably mounted water collection hopper at the bottom opening of the sedimentation tank 1.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An acidic heavy metal wastewater treatment and recovery device, comprising a sedimentation tank (1) with an open bottom, wherein a wastewater inlet pipe (2) and a reagent dosing pipe (3) are provided on one side of the sedimentation tank (1), characterized in that: The sedimentation tank (1) is equipped with a fixed support (4). A mixing mechanism (5) is installed on the fixed support (4) and is used to fully mix the wastewater and reagents entering the sedimentation tank (1); The mixing mechanism (5) includes a rotating wheel (51) vertically arranged in the fixed bracket (4). The end face of the rotating wheel (51) is provided with a drive shaft (52). Both ends of the drive shaft (52) are provided with a worm section (53). The sides of the two worm sections (53) are meshed with worm wheels (54). The center of the end face of the worm wheel (54) is provided with stirring blades (55) for mixing wastewater and reagents. The circumferential edge of the rotating wheel (51) is uniformly provided with several concave water bucket structures that resemble water ladles. The center extension lines of the wastewater inlet pipe (2) and the reagent addition pipe (3) coincide with the center point of the corresponding water bucket structure. The cleaning mechanism (6) is set at the bottom opening of the sedimentation tank (1) and is used to clean the sedimentation impurities that remain in the sedimentation tank (1) and react with the reagent. The cleaning mechanism (6) includes a conveyor belt (61) horizontally arranged at the bottom of the sedimentation tank (1). A side support block (62) is arranged on one side of the upper part of the conveyor belt (61). Several inlets (621) for passing sedimented impurities are evenly arranged on one side of the side support block (62). A movable baffle (63) for opening and closing the inlets (621) is arranged in the inner cavity of the side support block (62). A collection chamber (64) communicating with the outer wall of the sedimentation tank (1) is arranged in the inner cavity of the side support block (62) and on the other side opposite to the movable baffle (63). A negative pressure chamber (641) is connected to the outside of the collection chamber (64). A piston plate (642) is slidably limited inside the negative pressure chamber (641). A lead screw (643) extending to the outside is movably arranged on the end face of the piston plate (642).

2. The acidic heavy metal wastewater treatment and recovery equipment according to claim 1, characterized in that: A motor-driven drive roller (611) is provided on one side of the conveyor belt (61). One end of the drive roller (611) extends through the wall of the sedimentation tank (1) to the outside and is connected to the lead screw (643) and is provided with a belt conveyor unit (65).

3. The acidic heavy metal wastewater treatment and recovery equipment according to claim 1, characterized in that: The inner cavity of the side support block (62) is provided with a channel (622) that communicates with the inside of the collection cavity (64).

4. The acidic heavy metal wastewater treatment and recovery equipment according to claim 1, characterized in that: The bottom opening of the sedimentation tank (1) is equipped with a water collection hopper for collecting the wastewater after sedimentation and separation.

Images