A low-temperature desoldering device for waste circuit boards

Abstract

This utility model relates to the field of separation and recycling devices, and in particular to a low-temperature desoldering device for waste circuit boards, comprising: a support frame, a furnace body, a centrifugal desoldering component, a drive component, and a heating component; the furnace body is rotatably mounted on the support frame; a feed inlet is provided on one side of the furnace body, and a furnace door is provided on one side of the feed inlet; the centrifugal desoldering component is rotatably mounted in the furnace body for centrifugally ejecting molten tin; the drive component drives the centrifugal desoldering component to rotate; the heating component is used to change the temperature inside the furnace body. This utility model achieves rapid loading and unloading through the structure of the furnace body being horizontally mounted on the support frame, and the support frame allows the furnace body to tilt, allowing the processed tin inside the furnace body to be discharged through the tin discharge port. Furthermore, the entire working process is at a low temperature and includes a tail gas treatment device, making the desoldering process more convenient and faster, greatly improving work efficiency and reducing environmental pollution, which is in line with the concept of sustainable development.

Description

Technical Field

[0001] This utility model relates to the technical field of separation and recycling devices, and in particular to a low-temperature detinning device for waste circuit boards. Background Technology

[0002] In today's era of rapid development of electronic information technology, electronic products are updated and replaced at an extremely fast pace, resulting in a huge number of waste circuit boards, which usually contain a variety of metals such as tin, copper, gold, and silver, and have high recycling value. In the process of processing waste circuit boards, detinning is a key step.

[0003] Chinese patent CN202221572933.4 discloses a centrifugal detinning device, including a heating treatment tank, a drive assembly, and a centrifuge cylinder. The heating treatment tank has a receiving cavity for accommodating the centrifuge cylinder. The centrifuge cylinder is installed in the receiving cavity, with a gap between the centrifuge cylinder and the inner wall of the heating treatment tank. The centrifuge cylinder has a mesh filter structure. The drive assembly has a drive connecting rod that extends into the receiving cavity and is driven to connect with the centrifuge cylinder. A limiting connector is provided at the connection position between the drive connecting rod and the centrifuge cylinder. This utility model has a simple structure and reasonable design. In use, the electronic components to be detinned are loaded into the centrifuge cylinder, and then the centrifuge cylinder is loaded into the heating treatment tank. The heating treatment tank is heated, and the drive assembly drives the centrifuge cylinder to rotate centrifugally, gradually separating the tin dross in the electronic components from the mesh filter structure of the centrifuge cylinder to achieve high-efficiency detinning.

[0004] However, the device is installed vertically, which makes placing waste circuit boards more complicated and somewhat dangerous; after centrifugal desoldering, the inner tank needs to be removed to collect the solder, which reduces work efficiency; and there is no exhaust gas treatment device, which can easily cause environmental pollution. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a low-temperature desoldering device for waste circuit boards. The device features a structure where the furnace body is horizontally mounted on a support, enabling rapid loading and unloading. The support also allows the furnace body to tilt, allowing the processed solder to be discharged through the solder outlet. Furthermore, the entire process is conducted at low temperatures and includes an exhaust gas treatment device, making the desoldering process more convenient and efficient, significantly improving work efficiency and reducing environmental pollution, thus aligning with the concept of sustainable development.

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

[0007] A low-temperature desoldering device for waste circuit boards includes:

[0008] support;

[0009] The furnace body is rotatably mounted on the bracket; a feed inlet is provided on one side of the furnace body, and a furnace door is provided on one side of the feed inlet;

[0010] A centrifugal detinning assembly, used to centrifugally eject molten tin, is rotatably installed inside the furnace.

[0011] A drive assembly that drives the centrifugal desoldering assembly to rotate;

[0012] And a heating assembly, which is used to change the temperature inside the furnace.

[0013] As an improvement, the furnace body is mounted horizontally on the support.

[0014] As an improvement, the centrifugal detinning assembly includes a filter barrel, which is rotatably mounted on the side wall of the furnace body via a rotating shaft. One side of the filter barrel is open, and the filter barrel is provided with several filter holes.

[0015] As an improvement, the heating assembly includes heating rods installed inside the furnace body and a circulating fan installed on the top of the furnace body to ensure uniform temperature inside the furnace.

[0016] As an improvement, an exhaust port is provided on the top left side of the furnace body.

[0017] As an improvement, a tail gas treatment assembly is also included for treating the waste gas generated inside the furnace during the detinning process, with the exhaust port on the furnace body connected to the tail gas treatment assembly.

[0018] As an improvement, the exhaust gas treatment assembly includes:

[0019] An intake pipe, one end of which is connected to an exhaust port;

[0020] And an exhaust gas treatment tank, which contains a solution for treating exhaust gas; the top of the exhaust gas treatment tank is also provided with an outlet.

[0021] As an improvement, one end of the air intake pipe is equipped with a valve and connected to the atmosphere, while the other end extends into the solution to allow the exhaust gas to enter the solution.

[0022] As an improvement, the drive assembly includes a drive motor and a belt assembly, with both ends of the belt assembly connected to the output end of the drive motor and one end of the centrifugal desoldering assembly, respectively.

[0023] As an improvement, a nitrogen inlet and a tin outlet are also provided on one side of the bottom of the furnace body.

[0024] The beneficial effects of this utility model are as follows:

[0025] (1) This utility model can realize convenient and quick loading and unloading of materials by horizontally installing the furnace body, which greatly improves the working efficiency of desoldering of waste circuit boards and the safety of the whole process is high.

[0026] (2) This utility model can achieve rapid heating and cooling by using a low-temperature detinning process for waste circuit boards, which reduces the working time of the processed materials while protecting the metal properties, ensuring the recovery rate and purity of tin, and improving the recycling value. The low-temperature treatment process reduces energy consumption, and when combined with the exhaust gas treatment device, it can better reduce environmental pollution and achieve sustainable development. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the support structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the loading process of this utility model;

[0030] Figure 4 This is a schematic diagram of the tin removal process of this utility model.

[0031] Figure Labels

[0032] 1. Support frame; 2. Furnace body; 21. Feed inlet; 211. Furnace door; 22. Exhaust outlet; 23. Nitrogen inlet; 24. Solder discharge outlet; 3. Centrifugal desoldering assembly; 31. Filter barrel; 311. Filter hole; 4. Drive assembly; 41. Drive motor; 42. Belt assembly; 5. Heating assembly; 51. Heating rod; 52. Circulating fan; 6. Exhaust gas treatment assembly; 61. Inlet pipe; 611. Valve; 62. Exhaust gas treatment barrel; 621. Outlet. Detailed Implementation

[0033] 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.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Example 1

[0036] like Figure 1 , 2 As shown, this utility model provides a low-temperature desoldering device for waste circuit boards, comprising:

[0037] Support 1; The support 1 has a U-shaped structure and is used to support the furnace body 2;

[0038] Furnace body 2 is rotatably mounted on bracket 1; a feed inlet 21 is provided on one side of furnace body 2, and a furnace door 211 is provided on one side of feed inlet 21; the furnace door 211 is rotatably mounted on furnace body 2 via a rotating shaft; the furnace door 211 controls the opening / closing of feed inlet 21.

[0039] Centrifugal desoldering component 3 is rotatably installed inside the furnace body 2 to centrifuge and throw out the molten tin.

[0040] Drive component 4 drives the centrifugal detinning component 3 to rotate;

[0041] And heating component 5, which is used to change the temperature inside the furnace body 2.

[0042] As an improvement, the furnace body 2 is mounted horizontally on the bracket 1;

[0043] It should be noted that the horizontally installed furnace body 2 enables rapid loading and unloading, and at the same time, facilitates the centrifugal ejection of molten tin, thereby improving the detinning quality.

[0044] As an improvement, the centrifugal detinning assembly 3 includes a filter barrel 31, which is rotatably mounted on the side wall of the furnace body 2 via a rotating shaft. The width of the filter barrel 31 is adapted to the length of the furnace body 2. One side of the filter barrel 31 is open, and the filter barrel 31 is provided with a plurality of filter holes 311 for filtering molten tin into the furnace body 2. This process can efficiently remove tin elements, while the centrifugal rotation method can protect other delicate lines and components on the circuit board from damage, thereby significantly improving the regeneration quality of the circuit board and increasing resource utilization.

[0045] As an improvement, the heating component 5 includes a heating rod 51 installed inside the furnace body 2 and a circulating fan 52 installed on the top of the furnace body 2 to ensure uniform temperature inside the furnace, so that the furnace body 2 is heated to 250-280°C to melt tin. This process reduces environmental pollution through low-temperature treatment, alleviates the pressure of electronic waste on the environment from the source, and contributes to sustainable development.

[0046] Preferably, the drive assembly 4 includes a drive motor 41 and a belt assembly 42. The two ends of the belt assembly 42 are respectively connected to the output end of the drive motor 41 and one end of the centrifugal desoldering assembly 3. It should be noted that the drive assembly 4 in this embodiment is not limited to the above-mentioned method of the drive motor 41 driving the belt for transmission. Other methods that can drive the centrifugal desoldering assembly 3 to rotate are also applicable to this embodiment.

[0047] Preferably, the bottom side of the furnace body 2 is also provided with a nitrogen inlet 23 and a tin discharge port 24, which facilitates the discharge of air from the furnace body 2 before the detinning process begins, reducing the impact of air on the experimental results during the detinning process; it also facilitates the collection of the processed tin after the process is completed.

[0048] Example 2

[0049] like Figure 1 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows:

[0050] In this embodiment, an exhaust port 22 is provided on the top left side of the furnace body 2.

[0051] Furthermore, it also includes a tail gas treatment component 6 for treating the waste gas generated inside the furnace body 2 during the detinning process, and the exhaust port 22 on the furnace body 2 is connected to the tail gas treatment component 6.

[0052] Preferably, the exhaust gas treatment component 6 includes:

[0053] An intake pipe 61, one end of which is connected to an exhaust port 22;

[0054] And an exhaust gas treatment tank 62, which contains a solution for treating exhaust gas; the top of the exhaust gas treatment tank 62 is also provided with an outlet 621. It is worth noting that the type of solution can be selected according to the type of exhaust gas actually generated.

[0055] Furthermore, one end of the air inlet pipe 61 is equipped with a valve 611 and is connected to the atmosphere, while the other end extends into the solution to allow the exhaust gas to enter the solution.

[0056] It is worth noting that the pressure inside the furnace body 2 can be changed by altering the solution height inside the exhaust gas treatment tank 62.

[0057] Work steps

[0058] (1) First, open the furnace door 211 at the feed inlet 21 to load the material. After loading, close the furnace door 211.

[0059] (2) Then open the nitrogen inlet 23 and the valve 611 at the tail gas treatment component 6. Inject sufficient nitrogen / argon (oxygen content <10ppm) into the nitrogen inlet 23 to maintain a slight positive pressure (5-10kPa) inside the furnace body 2. Then close the nitrogen inlet 23 and the valve 611 at the tail gas treatment component 6.

[0060] (2) Heat the furnace body 2 by turning on the heating rod 51 and the circulating fan 52 to start heating the furnace body 2 until it reaches 250-280°C to melt the tin;

[0061] (3) Start the drive motor 41 to drive the centrifugal detinning component 3 to rotate, and at the same time set the speed of the drive motor 41 to make the centrifugal speed 500-2000 rpm, and use the density difference to separate the tin.

[0062] (4) After the tin has fallen to the bottom of the container and the furnace body 2 has cooled down naturally, tilt the furnace body 2 with the support 1 to move the tin closer to the tin outlet 24, and at the same time open the tin outlet 24 to collect the tin.

[0063] (5) Close the solder drain port 24 and start the circulating fan 52 at the same time to discharge the gas inside the furnace body 2 into the solution of the tail gas treatment component 6 for treatment;

[0064] (6) Finally, the collected tin is condensed into tin ingots (purity ≥ 99.5%) through a condensation device to complete the entire process of detinning waste circuit boards.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 low-temperature desoldering device for waste circuit boards, characterized in that, include: support; The furnace body is rotatably mounted on the bracket; a feed inlet is provided on one side of the furnace body, and a furnace door is provided on one side of the feed inlet; A centrifugal detinning assembly, used to centrifugally eject molten tin, is rotatably installed inside the furnace. A drive assembly that drives the centrifugal desoldering assembly to rotate; and a heating assembly for changing the temperature inside the furnace; The furnace body is mounted horizontally on the bracket; An exhaust port is provided on the top left side of the furnace body; It also includes a tail gas treatment assembly for treating the waste gas generated inside the furnace during the detinning process, wherein the exhaust port on the furnace is connected to the tail gas treatment assembly; The exhaust gas treatment component includes: An intake pipe, one end of which is connected to an exhaust port; And an exhaust gas treatment tank, which contains a solution for treating exhaust gas; the top of the exhaust gas treatment tank is also provided with an outlet. One end of the air inlet pipe is equipped with a valve and is connected to the atmosphere, while the other end extends into the solution to introduce exhaust gas into the solution.

2. The low-temperature desoldering equipment for waste circuit boards according to claim 1, characterized in that, The centrifugal detinning assembly includes a filter barrel, which is rotatably mounted on the side wall of the furnace body via a rotating shaft. One side of the filter barrel is open, and the filter barrel is provided with several filter holes.

3. The low-temperature desoldering equipment for waste circuit boards according to claim 1, characterized in that, The heating assembly includes heating rods installed inside the furnace body and a circulating fan installed on the top of the furnace body to ensure uniform temperature inside the furnace.

4. The low-temperature desoldering equipment for waste circuit boards according to claim 1, characterized in that, The drive assembly includes a drive motor and a belt assembly, with both ends of the belt assembly connected to the output end of the drive motor and one end of the centrifugal desoldering assembly, respectively.

5. The low-temperature desoldering equipment for waste circuit boards according to claim 1, characterized in that, The furnace body is also equipped with a nitrogen inlet and a tin outlet on one side of the bottom.

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