A tin recovery system for tin-containing wastewater

Abstract

This utility model discloses a tin recovery system for tin-containing wastewater, including a pretreatment tank. The top of the pretreatment tank has an inlet, and the bottom of the pretreatment tank is connected to the bottom of a recovery tank via a receiving hopper. One end of a drive motor extends into the pretreatment tank and is connected to a shaking mechanism. The shaking mechanism causes the two sets of lower and upper filter screens inside the pretreatment tank to shake up and down, facilitating the discharge of impurities from the top of the upper and lower filter screens. This tin recovery system for tin-containing wastewater achieves efficient filtration of tin-containing wastewater and full recovery of tin resources through a drive motor in the pretreatment tank driving a sector gear and connecting rack and pinion transmission, and then using a conveying component to circulate the wastewater. This effectively solves the problems of filter clogging and low recovery efficiency in existing technologies, reducing resource waste and water pollution.

Description

Technical Field

[0001] This utility model relates to the technical field of tin wastewater treatment, specifically a tin recovery system for tin-containing wastewater. Background Technology

[0002] Tin is an important industrial raw material widely used in welding, coating, and alloy manufacturing. However, the production and processing of tin products generate a large amount of tin-containing wastewater. If this wastewater is discharged directly without effective treatment, it will not only cause a serious waste of tin resources but also lead to water pollution, threatening the ecological environment and human health.

[0003] Because solid impurities in industrial wastewater adhere to the filter screen during filtration, resulting in low filtration efficiency, a wastewater pretreatment filtration device disclosed in the prior art (Chinese patent application number CN202421011655.4, application date 2024-05-11) can be used to solve this problem. This filtration device filters solid impurities in wastewater by setting up a filter assembly. In use, the filter assembly is first installed in the mounting groove, and wastewater is introduced into the housing from the inlet pipe. The wastewater is filtered by the filter screen to separate the solid impurities in the wastewater, and then the impurities are collected through the collection chamber. In addition, by using the cooperation of the insert block one and the slot one, the mounting frame one and the mounting frame two are combined together, which facilitates the installation of the fixing ring and the filter screen in the mounting groove, and also allows for quick replacement of the fixing ring and the filter screen, thereby improving the filtration effect.

[0004] Although the above-mentioned device can solve the problem of improving filtration efficiency, it is very easy to cause clogging on the surface of the filter screen during filtration. In this case, the filtration effect will be poor when treating tin wastewater.

[0005] Therefore, we proposed a tin recovery system for tin-containing wastewater that can effectively solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a tin recovery system for tin-containing wastewater, in order to solve the problem mentioned in the background art that the current recycling devices on the market are prone to clogging on the surface of the filter screen, which leads to poor filtration effect during the treatment of tin wastewater.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tin recovery system for tin-containing wastewater, comprising a pretreatment tank, an inlet at the top of the pretreatment tank, and a bottom connection between the pretreatment tank and the bottom of a recovery tank via a collection hopper; an inlet for adding hydrochloric acid is provided on the surface of the recovery tank; a fixed motor is fixed to the side wall of the recovery tank, the output end of which extends into the recovery tank and is connected to a stirring roller; a sludge collection screen is slidably disposed on one side of the recovery tank; and a drain outlet is connected to the end of the recovery tank away from the fixed motor; a drive motor is disposed at the back of the pretreatment tank, the output end of which extends into the pretreatment tank and is connected to a shaking mechanism. The shaking mechanism causes the two sets of lower and upper filter screens inside the pretreatment tank to shake up and down, facilitating the discharge of impurities from the top of the upper and lower filter screens.

[0008] As a preferred technical solution of this application, the shaking mechanism includes a sector gear fixed at the output end of the drive motor. Both the left and right ends of the sector gear are meshed with connecting racks. One set of connecting racks is fixed at the top of the lower filter plate, and the other set of connecting racks is fixed at the bottom of the upper filter plate. Solid collection ports are opened on one side of both the lower and upper filter plates.

[0009] As a preferred technical solution of this application, both the lower filter plate and the upper filter plate are inclined, and a solid collection port is opened at the lowest end of the lower filter plate and the upper filter plate, with the outer side of the solid collection port corresponding to the side wall of the collection box.

[0010] As a preferred technical solution of this application, the corner positions of the lower filter screen and the upper filter screen are connected by guide members. The guide members include a central receiving tube, and a return spring is embedded inside the receiving tube. The upper and lower ends of the return spring are fixed to one end of the connecting rod, and the outer ends of the two sets of connecting rods are respectively fixed to one side of the lower filter screen and the upper filter screen.

[0011] As a preferred technical solution of this application, the lower filter screen plate forms a back-and-forth shaking structure through the connecting rack and the sector gear, and there are two sets of sector gears symmetrical about the transverse center line of the pretreatment box.

[0012] As a preferred technical solution of this application, a conveying component is also installed on one side of the pretreatment box. The inlet of the conveying component extends into the inside of the receiving hopper, and the outlet of the conveying component extends into the top side of the pretreatment box.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This tin recovery system for tin-containing wastewater uses a drive motor in the pretreatment tank to drive a sector gear and a connecting rack, causing the upper and lower filter screens to vibrate back and forth with the help of a return spring in the guide component. The inclined filter screen, combined with the solid collection port, can promptly discharge impurities, avoiding filter screen blockage and improving filtration efficiency. The recovery tank introduces hydrochloric acid through the inlet, which reacts fully with the stirring roller. Tin slag is collected by the slag collection net, and the treated liquid is discharged through the outlet. The wastewater is then circulated using the conveying component, achieving efficient filtration of tin-containing wastewater and full recovery of tin resources. This effectively solves the problems of filter blockage and low recovery efficiency in the prior art, reducing resource waste and water pollution. Specific details are as follows:

[0014] 1. The drive motor inside the pretreatment box drives the sector gear and connecting rack, causing the upper and lower filter plates to reciprocate and shake with the elastic cooperation of the return spring in the guide. Combined with the inclined filter structure and solid collection port, it can automatically shake off attached impurities and guide them to the collection box, fundamentally solving the problem of low filtration efficiency caused by traditional filter clogging, and ensuring continuous and efficient operation in the wastewater pretreatment stage.

[0015] 2. The recycling tank is equipped with an inlet for adding hydrochloric acid. A stirring roller driven by a fixed motor is used to achieve a full reaction between the acidic solution and the tin-containing wastewater. The generated tin dross is precisely intercepted by a sliding dross collection net, and the treated liquid is discharged through the outlet.

[0016] 3. The conveying component on one side of the pretreatment box re-transports the wastewater in the receiving hopper to the top of the box, forming a filtration cycle. Combined with the dynamic filtration effect of the shaking mechanism, multiple rounds of impurity separation can be performed on the wastewater. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the main cross-sectional structure of the pretreatment box of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the main structure of the upper filter screen of this utility model;

[0022] Figure 6 This is a schematic diagram of the main cross-sectional structure of the guide component of this utility model.

[0023] In the diagram: 1. Pretreatment box; 2. Feed inlet; 3. Collection hopper; 4. Recycling box; 5. Liquid inlet; 6. Fixed motor; 7. Slag collection screen; 8. Liquid outlet; 9. Drive motor; 10. Sector gear; 11. Connecting rack; 12. Lower filter screen; 13. Upper filter screen; 14. Solid collection port; 15. Guide component; 1501. Receiving tube; 1502. Return spring; 1503. Connecting rod; 16. Collection box; 17. Conveying assembly. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6 The present invention provides the following technical solution: a tin recovery system for tin-containing wastewater.

[0026] Example 1: For tin recycling, please refer to the attached document. Figure 1 -Appendix Figure 2 The system includes a pretreatment box 1, a feed inlet 2 at the top of the pretreatment box 1, a bottom connection between the bottom of the pretreatment box 1 and the bottom of the recovery box 4 via a receiving hopper 3, a liquid inlet 5 on the surface of the recovery box 4 for easy addition of hydrochloric acid, a fixed motor 6 fixed to the side wall of the recovery box 4, the output end of the fixed motor 6 extending into the recovery box 4 and connected to the stirring roller, a slag collection net 7 slidably disposed on one side of the recovery box 4, and a drain outlet 8 connected to the end of the recovery box 4 away from the fixed motor 6.

[0027] Hydrochloric acid is added through the inlet 5 on the surface of the recovery tank 4. A fixed motor 6 drives the internal stirring roller to rotate, ensuring thorough mixing of the hydrochloric acid with the tin-containing wastewater. The hydrochloric acid reacts with the tin ions in the wastewater to form soluble tin salts, while insoluble impurities precipitate. Undissolved tin slag or precipitates in the resulting mixture are intercepted by a sliding slag-collecting net 7. Operators can remove the tin slag using the sliding net 7, achieving initial recovery. The liquid containing dissolved tin salts is discharged from the outlet 8 at the other end of the recovery tank 4 for subsequent processing.

[0028] Example 2: To address the problem of easy clogging on the filter screen in current recycling devices, which leads to poor filtration efficiency during tin wastewater treatment, please refer to the attached document. Figure 1 -Appendix Figure 6A drive motor 9 is located at the back of the pretreatment box 1. The output end of the drive motor 9 extends into the pretreatment box 1 and is connected to a shaking mechanism. The shaking mechanism causes the two sets of lower filter plates 12 and upper filter plates 13 inside the pretreatment box 1 to shake up and down, facilitating the discharge of impurities from the top of the upper filter plate 13 and the lower filter plate 12. The shaking mechanism includes a sector gear 10 fixed at the output end of the drive motor 9. Connecting racks 11 are meshed at both ends of the sector gear 10. One set of connecting racks 11 is fixed to the top of the lower filter plate 12, and the other set is fixed to the bottom of the upper filter plate 13. Solid collection ports 14 are provided on one side of both the lower filter plate 12 and the upper filter plate 13. (Refer to attached diagram). Figure 4 Both the lower filter plate 12 and the upper filter plate 13 are inclined, and solid collection ports 14 are provided at the lowest points of the lower filter plate 12 and the upper filter plate 13. The outer side of the solid collection port 14 corresponds to the side wall of the collection box 16; see attached figure. Figure 6 The corner positions of the lower filter plate 12 and the upper filter plate 13 are connected by guide members 15. The guide member 15 includes a central receiving tube 1501, and a return spring 1502 is embedded inside the receiving tube 1501. The upper and lower ends of the return spring 1502 are fixed to one end of the connecting rod 1503. The outer ends of the two sets of connecting rods 1503 are respectively fixed to one side of the lower filter plate 12 and the upper filter plate 13. The lower filter plate 12 forms a back-and-forth shaking structure with the connecting rack 11 and the sector gear 10. The sector gear 10 has two sets symmetrical about the transverse center line of the pretreatment box 1.

[0029] Tin-containing wastewater enters the pretreatment tank 1 through the inlet 2 at the top. It first passes through the inclined upper filter plate 13 and lower filter plate 12. The two filter plates have different pore sizes, which can classify and filter solid impurities in the wastewater. Larger particles are retained on the upper filter plate, and smaller particles are retained on the lower filter plate. After the drive motor 9 at the back of the pretreatment tank 1 starts, the sector gear 10 at its output end begins to rotate. The connecting racks 11 that mesh at the left and right ends of the sector gear 10 are fixed to the top of the lower filter plate 12 and the bottom of the upper filter plate 13, respectively, driving the two filter plates to move up and down. The return spring 1502 inside the guide member 15 provides buffering and restoring force when the filter screen shakes, ensuring the stability of the shaking process. The inclined filter screen causes impurities to slide towards the lowest solid collection port 14 during shaking and finally fall into the collection box 16, avoiding filter screen blockage.

[0030] Example 3: For high-efficiency impurity removal, please refer to the attached document. Figure 1 -Appendix Figure 3A conveying assembly 17 is also installed on one side of the pretreatment box 1. The inlet of the conveying assembly 17 extends into the inside of the receiving hopper 3, and the outlet of the conveying assembly 17 extends into the top side of the pretreatment box 1.

[0031] The filtered wastewater flows into the recovery tank 4 through the receiving hopper 3 at the bottom of the pretreatment tank 1. At the same time, the conveying component 17 on one side of the pretreatment tank 1 pumps the wastewater in the receiving hopper 3 back to the top of the pretreatment tank 1 to form a circulating filtration, which improves the impurity removal rate and can then be filtered again by the shaking mechanism.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A tin recovery system for tin-containing wastewater, comprising a pretreatment tank (1), wherein a feed inlet (2) is provided at the top of the pretreatment tank (1), and the bottom of the pretreatment tank (1) is connected to the bottom of the recovery tank (4) via a receiving hopper (3); characterized in that The surface of the recovery tank (4) is provided with an inlet (5) for easy addition of hydrochloric acid. A fixed motor (6) is also fixed to the side wall of the recovery tank (4). The output end of the fixed motor (6) extends into the recovery tank (4) and is connected to the stirring roller. A slag collection net (7) is also slidably provided on one side of the recovery tank (4). A drain port (8) is connected to the end of the recovery tank (4) away from the fixed motor (6). A drive motor (9) is provided at the back of the pretreatment box (1). The output end of the drive motor (9) extends into the pretreatment box (1) and is connected to a shaking mechanism. The shaking mechanism enables the two sets of lower filter plates (12) and upper filter plates (13) inside the pretreatment box (1) to shake up and down, so as to facilitate the discharge of impurities from the top of the upper filter plate (13) and the lower filter plate (12).

2. The tin recovery system for tin-containing wastewater according to claim 1, characterized by: The shaking mechanism includes a sector gear (10) fixed at the output end of the drive motor (9). Both the left and right ends of the sector gear (10) are meshed with connecting racks (11). One set of connecting racks (11) is fixed at the top of the lower filter plate (12), and another set of connecting racks (11) is fixed at the bottom of the upper filter plate (13). Solid collection ports (14) are opened on one side of both the lower filter plate (12) and the upper filter plate (13).

3. The tin recovery system for tin-containing wastewater according to claim 2, characterized in that: Both the lower filter plate (12) and the upper filter plate (13) are inclined, and a solid collection port (14) is provided at the lowest end of the lower filter plate (12) and the upper filter plate (13). The outer side of the solid collection port (14) corresponds to the side wall of the collection box (16).

4. The tin recovery system for tin-containing wastewater according to claim 2, characterized by: The corner positions of the lower filter plate (12) and the upper filter plate (13) are connected by guide members (15). The guide member (15) includes a central receiving tube (1501), and a return spring (1502) is embedded inside the receiving tube (1501). The upper and lower ends of the return spring (1502) are fixed to one end of the connecting rod (1503). The outer ends of the two sets of connecting rods (1503) are respectively fixed to one side of the lower filter plate (12) and the upper filter plate (13).

5. The tin recovery system for tin-containing wastewater according to claim 2, characterized by: The lower filter plate (12) forms a back-and-forth shaking structure between the connecting rack (11) and the sector gear (10), and the sector gear (10) has two sets symmetrical about the transverse center line of the pretreatment box (1).

6. The tin recovery system for tin-containing wastewater according to claim 1, characterized in that: A conveying assembly (17) is also installed on one side of the pretreatment box (1). The inlet of the conveying assembly (17) extends into the inside of the receiving hopper (3), and the outlet of the conveying assembly (17) extends into the top side of the pretreatment box (1).

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