Acid heavy metal wastewater treatment and recovery equipment

Abstract

The invention relates to the technical field of wastewater treatment, in particular to acidic heavy metal wastewater treatment and recovery equipment which comprises a settling tank with a bottom opening, a wastewater inlet pipe and a medicament adding pipe are arranged on one side of the settling tank, and a fixing support is arranged in the settling tank; the uniform mixing mechanism is arranged on the fixed bracket and is used for fully and uniformly mixing the wastewater and the medicament entering the settling tank; and the cleaning mechanism is arranged at the bottom opening of the settling box and is used for cleaning settled impurities which are retained in the settling box and react with the medicament. Through the arranged cleaning mechanism, settled impurities which are detained on a conveying net belt and react through a medicament can be conveyed into an inner cavity of a side supporting block through an inlet, and meanwhile the impurities are sucked into the collecting cavity through channel negative pressure under the piston movement effect of a piston plate in a negative pressure cavity communicating with the exterior of the collecting cavity to be collected; and driving mixing without a power device is also realized.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to acidic heavy metal wastewater treatment and recovery equipment. Background Art

[0002] Acidic heavy metal wastewater usually comes from industries such as mining, metal smelting, electroplating, and battery manufacturing. This type of wastewater contains high concentrations of acidic substances (such as sulfuric acid, nitric acid, etc.) and heavy metal ions (such as copper, lead, zinc, cadmium, mercury, etc.), which are extremely harmful to the environment and human health. It can pollute water bodies and soil, affect the ecosystem, and may accumulate through the food chain, ultimately affecting humans. Therefore, the treatment of acidic heavy metal wastewater is necessary. During the treatment process, flocculants need to be mixed into the wastewater for corresponding precipitation reactions to separate some acidic or heavy metal substances.

[0003] However, the precipitated waste residue and impurities generated during the filtration process of the wastewater after the reagent reaction will be retained in the sedimentation tank, so the sedimentation tank needs to be cleaned from time to time, and people need to go down to the bottom of the tank manually to remove the waste residue and impurities. The workload is large, resulting in poor wastewater treatment effect.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

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

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: an acidic heavy metal wastewater treatment and recovery device, comprising a sedimentation box with an open bottom, a wastewater inlet pipe and a reagent adding pipe are arranged on one side of the sedimentation box, and a fixed bracket is arranged inside the sedimentation box;

[0007] A mixing mechanism, arranged on the fixed support, for fully mixing the wastewater and the reagent entering the sedimentation tank;

[0008] The cleaning mechanism is arranged at the bottom opening of the sedimentation box and is used for cleaning the precipitated impurities that are retained in the sedimentation box and react with the reagent.

[0009] Furthermore, the cleaning mechanism includes a conveyor mesh belt horizontally arranged at an open bottom of the sedimentation box, a side support block is arranged in contact with the upper side of the conveyor mesh belt, a plurality of inlets for passing the settled impurities are evenly arranged on one side of the side support block, the inner cavity of the side support block is provided with a movable shielding rod for opening and closing the inlet, and the inner cavity of the side support block and the other side opposite to the movable shielding rod are provided with a collecting chamber connected to the outer wall of the sedimentation box.

[0010] Furthermore, a negative pressure chamber is provided in communication with the outer side of the collecting chamber, a piston plate is provided inside the negative pressure chamber for sliding limit, and a screw rod extending to the outside is movably provided on the end surface of the piston plate.

[0011] Furthermore, a motor-driven active roller is provided on one side of the conveyor mesh belt, and one end of the active roller passes through the wall of the sedimentation box and extends to the outside to be connected to the screw rod and is provided with a belt conveying unit.

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

[0013] Furthermore, the mixing mechanism includes a rotating wheel vertically arranged in the fixed bracket, a transmission shaft is arranged on the end face of the rotating wheel, a worm portion is arranged at both ends of the transmission shaft, the sides of the two worm portions are meshed with worm wheels, and a stirring blade for mixing wastewater and medicine is arranged at the center of the end face of the worm wheel.

[0014] Furthermore, a plurality of concave water bucket structures shaped like water scoops are evenly arranged on the circumferential edge of the rotating wheel, and the center extension lines of the wastewater inlet pipe and the chemical addition pipe coincide with the center points of the corresponding water bucket structures.

[0015] Furthermore, the bottom of the sedimentation tank is open and provided with a water collecting 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 provided in the present invention can transport the precipitated impurities retained on the conveyor mesh belt and reacted with the reagent into the inner cavity of the side support block through the inlet, and at the same time, the piston movement of the piston plate inside the negative pressure chamber connected to the outside of the collecting chamber sucks the impurities into the collecting chamber through the channel negative pressure for collection; the mixing mechanism provided can utilize the jet impact of the wastewater inlet pipe and the reagent adding pipe on the impeller to drive the impeller to rotate, and then drive the stirring blades to rotate inside the sedimentation box, thereby achieving a sufficient mixing effect of the wastewater and the reagent added inside the sedimentation box, without the need for electric device drive, energy saving and environmental protection, and improved power efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a front cross-sectional structural diagram of an overall embodiment of the present invention;

[0019] Figure 2 A three-dimensional structural diagram of an overall perspective of an embodiment of the present invention;

[0020] Figure 3 A three-dimensional structural diagram of a sectional view of an embodiment of the present invention;

[0021] Figure 4 for Figure 3 The structure diagram at A is enlarged;

[0022] Figure 5 Another cross-sectional perspective structural diagram of an embodiment of the present invention.

[0023] In the figure: 1. sedimentation tank; 2. wastewater inlet pipe; 3. reagent adding pipe; 4. fixed bracket; 5. mixing mechanism; 51. rotating wheel; 52. transmission shaft; 53. worm part; 54. worm wheel; 55. stirring blade; 6. cleaning mechanism; 61. conveying mesh belt; 611. driving roller; 62. side support block; 621. inlet; 622. channel; 63. movable shielding rod; 64. collecting chamber; 641. negative pressure chamber; 642. piston plate; 643. screw; 65. belt transmission unit. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to 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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] like Figure 1-5 As shown, the wastewater treatment and recovery equipment of the present invention is applied to the treatment and recovery of acidic heavy metal wastewater, comprising a sedimentation box 1 with an open bottom, a wastewater inlet pipe 2 and a reagent adding pipe 3 are arranged on one side of the sedimentation box 1, and a fixed bracket 4 is arranged inside the sedimentation box 1;

[0028] A mixing mechanism 5, arranged on the fixed support 4, is used to fully mix the wastewater and the reagent entering the sedimentation tank 1;

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

[0030] In the specific implementation, the wastewater inlet pipe 2 and the reagent adding pipe 3 are respectively plugged into the two holes machined on the supporting surface on one side of the sedimentation box 1, and the mixing mechanism 5 is fixed by the fixed bracket 4 inside the sedimentation box 1 and the cleaning mechanism 6 is installed at the open bottom of the sedimentation box 1. On the one hand, the mixing mechanism 5 can realize the mixing and sedimentation reaction of the wastewater and the reagent inside the sedimentation box 1 without electric drive. On the other hand, after the sedimentation reaction is stopped, the precipitated impurities reacting with the reagent and retained on the conveyor mesh belt 61 included in the cleaning mechanism 6 are transported by the power of the conveyor mesh belt 61 to achieve the effect of gathering and collecting, thereby improving the convenience of cleaning and the efficiency of wastewater treatment.

[0031] It should be noted that the outer end of the wastewater inlet pipe 2 is welded with a flange for connecting to the wastewater discharge pipe, and the outer end of the reagent adding pipe 3 is installed with a reagent barrel, and the reagent barrel is filled with chemical reagents that react with the acid 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 adding pipe 3 close to the mixing mechanism 5.

[0033] In one embodiment, the cleaning mechanism 6 includes a conveyor mesh belt 61 horizontally arranged at an open bottom of the sedimentation box 1, a side support block 62 is arranged in contact with the upper side of the conveyor mesh belt 61, and a plurality of inlets 621 for passing through the precipitated impurities are evenly arranged on one side of the side support block 62, and the inner cavity of the side support block 62 is provided with a movable shielding rod 63 for opening and closing the inlet 621, and the inner cavity of the side support block 62 and the other side opposite to the movable shielding rod 63 are provided with a collecting chamber 64 connected to the outer wall of the sedimentation box 1. In this design, through the conveyor mesh belt 61 installed horizontally at the bottom of the sedimentation box 1 with an open bottom, and the side support block 62 welded on the inner wall of the sedimentation box 1 and partially in contact with the conveyor mesh belt 61, when the conveyor mesh belt 61 applies power to convey it to one side, the movable shielding rod 63 can be pulled longitudinally to deviate from the corresponding shielding plate integrally formed on the movable shielding rod 63 at the inlet 621, so that the inside of the side support block 62 forms an internal and external passage through several evenly distributed inlets 621 opened thereon, so that the precipitated impurities retained on the conveyor mesh belt 61 can enter the inside of the side support block 62 through the inlet 621 under the transportation of the conveyor mesh belt 61. At the same time, the piston movement of the piston plate 642 inside the negative pressure chamber 641 connected to the outside of the collecting chamber 64 sucks the impurities into the collecting chamber 64 through the channel 622 for collection.

[0034] In one embodiment, the outer side of the collecting chamber 64 is connected to a negative pressure chamber 641, and a piston plate 642 is provided inside the negative pressure chamber 641 for sliding and limiting. The end surface of the piston plate 642 is movably provided with a screw rod 643 extending to the outside. With this design, the piston plate 642, which is rotationally matched with the screw rod 643, is limited and moved in the slide groove machined inside the negative pressure chamber 641. When the screw rod 643 rotates, the piston plate 642, which is rotationally matched with the thread on it, is driven to perform linear motion in the slide groove machined on one end surface inside the negative pressure chamber 641, so that the side of the negative pressure chamber 641 separated by the piston plate 642 is expanded, so that the negative pressure inside the collecting chamber 64 corresponding to the side is sucked into the impurities inside the side support block 62.

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

[0036] In one embodiment, a motor-driven active roller 611 is provided on one side of the conveying mesh belt 61, and a belt transmission unit 65 is provided on one end of the active roller 611, which passes through the wall of the sedimentation box 1 and extends to the outside and is connected to the screw rod 643. In this design, two fixed pulleys are respectively sleeved on the ends of the active roller 611 and the ends of the screw rod 643, and the same transmission belt is wound around the two pulleys. Under the drive of the motor connected to the active roller 611 through the coupling at one end, the conveying mesh belt 61 wound thereon is driven to be transported toward the side support block 62 under the rotation support of the auxiliary roller on the other side. At the same time, the pulley sleeved on the outer end of the active roller 611 and the transmission belt wound on the pulley transmit power to the screw rod 643 and the pulley sleeved on the outer end of the screw rod 643, thereby realizing power transmission and achieving good use effect.

[0037] In one embodiment, the inner cavity of the side support block 62 is provided with a channel 622 communicating with the interior of the collection chamber 64. In this design, by turning the channel 622 communicating with the interior of the collection chamber 64 in the inner cavity of the side support block 62, the arc-shaped channel 622 forms a smooth material guide surface, so that the precipitated impurities of the medicine reaction entering the side support block 62 enter the collection chamber 64 through the channel 622.

[0038] In one embodiment, the mixing mechanism 5 includes a rotating wheel 51 vertically arranged in the fixed bracket 4, and a transmission shaft 52 is arranged on the end face of the rotating wheel 51. A worm portion 53 is arranged at both ends of the transmission shaft 52. The sides of the two sections of the worm portion 53 are meshed with worm wheels 54. The center of the end face of the worm wheel 54 is provided with a stirring blade 55 for mixing wastewater and medicine. With this design, through the rotating wheel 51 installed vertically in the fixed bracket 4, the transmission shaft 52 fixedly passed through the center of the end face of the rotating wheel 51, and the worm parts 53 welded at both ends of the transmission shaft 52, when the rotating wheel 51 rotates, the generated rotational force will be transmitted to the worm part 53 through the transmission shaft 52, and then drive the worm wheel 54 meshingly connected to the side of the worm part 53 to rotate, so that the stirring blades 55 sleeved on the end face of the worm wheel 54 can fully mix the acidic or heavy metal substances and the reagents added in the wastewater inside the sedimentation box 1, thereby realizing the chemical precipitation of the acidic or heavy metal substances in the wastewater, and the use effect is good.

[0039] In one embodiment, the circumferential edge of the rotating wheel 51 is evenly provided with several concave bucket structures shaped like water scoops, and the center extension lines of the wastewater inlet pipe 2 and the drug adding pipe 3 coincide with the center points of the corresponding bucket structures. In this design, by evenly welding several concave bucket structures shaped like water scoops on the circumferential edge of the rotating wheel 51, and coinciding with the center extension lines of the wastewater inlet pipe 2 and the drug adding pipe 3 with the center points of the bucket structures, the nozzle jets at the ends of the wastewater inlet pipe 2 and the drug adding pipe 3 impact the bucket structures, which can drive the rotating wheel 51 to rotate within the support area of ​​the fixed bracket 4, providing rotational power without electric drive, energy saving and environmental protection.

[0040] In one embodiment, the bottom opening of the sedimentation tank 1 is provided with a water collecting hopper for collecting the wastewater after sedimentation separation. With this design, the wastewater after sedimentation separation can be diverted and transported to the wastewater recovery tank through the water collecting hopper that is detachably assembled 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in 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 adding pipe (3) are arranged on one side of the sedimentation tank (1), characterized in that: A fixing bracket (4) is arranged inside the sedimentation box (1); A mixing mechanism (5) is arranged on the fixed support (4) and is used to fully mix the wastewater and the reagent entering the sedimentation tank (1); A cleaning mechanism (6) is arranged at the bottom opening of the sedimentation tank (1) and is used to clean the precipitated impurities that are retained in the sedimentation tank (1) and react with the reagent.

2. The acidic heavy metal wastewater treatment and recovery equipment according to claim 1, characterized in that: The cleaning mechanism (6) comprises a conveyor mesh belt (61) horizontally arranged at the bottom of the sedimentation box (1) and open; a side support block (62) is arranged in contact with the upper side of the conveyor mesh belt (61); a plurality of inlets (621) for passing the settled impurities are evenly arranged on one side of the side support block (62); a movable shielding rod (63) for opening and closing the inlet (621) is arranged in the inner cavity of the side support block (62); and a collecting chamber (64) connected to the outer wall of the sedimentation box (1) is arranged in the inner cavity of the side support block (62) and on the other side opposite to the movable shielding rod (63).

3. The acidic heavy metal wastewater treatment and recovery equipment according to claim 2, characterized in that: The outer side of the collecting chamber (64) is connected to a negative pressure chamber (641), the inner side of the negative pressure chamber (641) is provided with a piston plate (642) for sliding limit, and the end surface of the piston plate (642) is movably provided with a screw rod (643) extending to the outside.

4. The acidic heavy metal wastewater treatment and recovery equipment according to claim 3, characterized in that: A motor-driven active roller (611) is disposed on one side of the conveying mesh belt (61), and a belt conveying unit (65) is disposed on one end of the active roller (611) which passes through the wall of the sedimentation box (1) and extends to the outside to be connected to the screw rod (643).

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

6. The acidic heavy metal wastewater treatment and recovery equipment according to claim 1, characterized in that: The mixing mechanism (5) comprises a rotating wheel (51) vertically arranged in the fixed bracket (4), a transmission shaft (52) being arranged at the end surface of the rotating wheel (51), a worm portion (53) being arranged at both ends of the transmission shaft (52), a worm wheel (54) being meshed at the side portions of the two worm portions (53), and a stirring blade (55) for mixing wastewater and medicine being arranged at the center of the end surface of the worm wheel (54).

7. The acidic heavy metal wastewater treatment and recovery equipment according to claim 6, characterized in that: The circumferential edge of the rotating wheel (51) is evenly provided with a plurality of inwardly concave water bucket structures shaped like water scoops, and the center extension lines of the wastewater inlet pipe (2) and the reagent adding pipe (3) coincide with the center points of the corresponding water bucket structures.

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

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