Precious and rare metal recovery device

Abstract

The utility model relates to the technical field of precious and rare metal recovery, and provides a precious and rare metal recovery device which comprises a crushing device, a steam distillation cracking furnace, a water tank, a conveying pipeline, a liquid oxygen negative pressure furnace, a collecting device and a waste gas treatment device, the water tank is arranged at the bottom of the steam distillation cracking furnace, the discharging pipe is arranged between the bottom of the steam distillation cracking furnace and the water tank, cooling liquid is arranged in the water tank, the conveying pipeline is arranged on the side portion of the water cooling device, and the liquid oxygen negative pressure furnace is connected with the conveying pipeline. The steam distillation cracking furnace is arranged to perform high-temperature cracking on raw materials, so that precious and rare metals are separated from other substances, then the precious metals are further treated and extracted in negative pressure and liquid oxygen environments through the liquid oxygen negative pressure furnace, steam distillation cracking and heat energy cyclic utilization are utilized, and the precious metals are recovered and utilized, so that not only can economic value be created, but also the energy consumption is reduced. Meanwhile, waste can be turned into wealth, energy is saved, and environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of precious and rare metal recycling, and particularly relates to a recycling device for precious and rare metals. Background Art

[0002] Precious metals in waste printed circuit boards generally refer to metals such as gold (Au), silver (Ag), platinum (Pt), copper (Cu), tin (Sn), nickel (Ni), and palladium (Pd). These metals are relatively scarce. According to statistics, about 272 kg of plastic, 130 kg of copper, 0.45 kg of gold, 41 kg of iron, 30 kg of lead, 20 kg of tin, 18 kg of nickel, and 10 kg of antimony are contained in 1 t of randomly collected waste printed circuit boards. Therefore, waste printed circuit boards can be regarded as a kind of "high-grade" ore, with a very high degree of resource recyclability and extremely high economic benefits. At present, through hydrometallurgical technology, taking advantage of the fact that metals can dissolve in nitric acid and sulfuric acid, the crushed circuit boards are immersed in a sulfuric acid pool, and then the metals are removed from the electronic waste and recovered from the liquid phase. However, this recovery method causes relatively large environmental pollution and high energy consumption. In view of this, this application is specifically proposed. Content of the Utility Model

[0003] This application proposes a recycling device for precious and rare metals to solve the technical problems in the prior art that through hydrometallurgical technology, taking advantage of the fact that metals can dissolve in nitric acid and sulfuric acid, the crushed circuit boards are immersed in a sulfuric acid pool, and then the metals are removed from the electronic waste and recovered from the liquid phase, while this recovery method causes relatively large environmental pollution and high energy consumption. The above technical purpose of the utility model is achieved through the following technical solutions:

[0004] A recycling device for precious and rare metals includes a crushing device, a steam distillation cracking furnace, a water tank, a conveying pipeline, a liquid oxygen negative pressure furnace, a collection device, and an exhaust gas treatment device. The crushing device is located above the steam distillation cracking furnace. The conveying pipeline is arranged between the bottom of the steam distillation cracking furnace and the water tank. The water tank is provided with coolant. The liquid oxygen negative pressure furnace is connected to the water tank. The collection device is connected to the liquid oxygen negative pressure furnace. The exhaust gas treatment device is connected to the top of the steam distillation cracking furnace.

[0005] Preferably, a linear track is arranged inside the liquid oxygen negative pressure furnace.

[0006] Preferably, the crushing device includes a crushing barrel, a motor, a crushing rod, and a discharge port. The crushing barrel is arranged above the steam distillation cracking furnace. The motor is arranged on the top of the crushing barrel. The crushing rod is arranged on the output shaft of the motor. The crushing rod is located inside the crushing barrel. The discharge port is arranged at the bottom of the crushing barrel.

[0007] Preferably, the waste gas treatment device includes an air delivery pipe, a gravity settling chamber, a cooler, a bag filter, and a flue gas scrubbing tower. The air delivery pipe is arranged between the gravity settling chamber and the steam distillation cracking furnace, and the gravity settling chamber, the cooler, the bag filter, and the flue gas scrubbing tower are connected in sequence.

[0008] Preferably, a check valve is provided on the air delivery pipe.

[0009] Preferably, the collection device includes a collection frame.

[0010] Compared with the prior art, the beneficial effects of the present utility model include: by arranging a steam distillation cracking furnace to pyrolyze the raw materials at high temperature, precious and rare metals are separated from other substances, and then further processed through a liquid oxygen negative pressure furnace under negative pressure and liquid oxygen environment to extract precious and rare metals. By applying steam distillation cracking and heat energy recycling, these precious metals are recycled and utilized, which can not only create economic value, but also turn waste into treasure, playing a certain role in saving energy, reducing environmental pollution, and improving the ecological environment. Description of the Drawings

[0011] Figure 1 is a structural schematic diagram of the present utility model.

[0012] In the figure: 1. Steam distillation cracking furnace; 2. Water tank; 3. Delivery pipeline; 4. Liquid oxygen negative pressure furnace; 5. Linear track; 6. Crushing barrel; 61. Motor; 7. Crushing rod; 8. Discharge port; 9. Air delivery pipe; 10. Gravity settling chamber; 11. Cooler; 12. Bag filter; 13. Flue gas scrubbing tower; 14. Check valve. Detailed Embodiments

[0013] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0014] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0015] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0016] Please refer to the attached Figure 1 , a precious and rare metal recovery device, comprising a crushing device, a steam distillation cracking furnace 1, a water tank 2, a conveying pipeline 3, a liquid oxygen negative pressure furnace 4, a collection device, and an exhaust gas treatment device. The crushing device is located above the steam distillation cracking furnace 1. The conveying pipeline 3 is arranged between the bottom of the steam distillation cracking furnace 1 and the water tank 2. The water tank 2 is provided with a coolant. The liquid oxygen negative pressure furnace 4 is connected to the water tank 2. The collection device is connected to the liquid oxygen negative pressure furnace 4. The exhaust gas treatment device is connected to the top of the steam distillation cracking furnace 1.

[0017] Adopting the above technical solutions, first, the raw material, the waste circuit board, is crushed by the crushing device. The crushed part is convenient for subsequent processing. Then, the crushed raw material enters the steam distillation cracking furnace 1 for high-temperature cracking, and the precious and rare metals are separated from other substances. The solid slag after cracking enters the water tank 2 through the discharge pipe and is quickly cooled under the action of the coolant to prevent continuous reaction or oxidation. It should be noted that a heat dissipation device is provided on the water tank 2, and the heat dissipation device is used to assist water cooling. Then, the solid slag enters the liquid oxygen negative pressure furnace 4 through the conveying pipeline 3 and is further processed in a negative pressure and liquid oxygen environment to extract the precious and rare metals. The extracted precious and rare metals are collected by the collection device, and the exhaust gas generated by the steam distillation cracking furnace 1 is treated by the exhaust gas treatment device to ensure environmental safety.

[0018] In some embodiments, a linear track 5 is provided inside the liquid oxygen negative pressure furnace 4.

[0019] By adopting the above technical solution, a linear track 5 is set inside the liquid oxygen negative pressure furnace 4, so that the solid slag can be moved along a specific path in the furnace, ensuring that the solid slag is evenly distributed in the furnace, increasing the contact area with liquid oxygen, and improving the extraction efficiency of precious and rare metals. Through the design of the linear track 5, not only the extraction efficiency of precious and rare metals is improved, but also the uniform distribution of temperature in the furnace is ensured, thereby reducing energy consumption.

[0020] In some embodiments, the crushing device includes a crushing barrel 6, a motor 61, a crushing rod 7 and a discharge port 8. The crushing barrel 6 is arranged above the steam distillation cracking furnace 1, the motor 61 is arranged on the top of the crushing barrel 6, the crushing rod 7 is arranged on the output shaft of the motor 61, the crushing rod 7 is located in the crushing barrel 6, and the discharge port 8 is arranged at the bottom of the crushing barrel 6.

[0021] By adopting the above technical scheme, the motor 61 is controlled to drive the crushing rod 7 to rotate in the crushing barrel 6 to crush the raw material. The crushed raw material is discharged through the discharge port 8 and enters the steam distillation cracking furnace 1. The raw material is crushed by the crushing device, which increases the contact area between the raw material and the cracking furnace and improves the cracking efficiency. At the same time, the crushed raw material is easier to burn in the cracking furnace, reducing energy consumption.

[0022] In some embodiments, the waste gas treatment device includes a gas pipe 9, a gravity settling chamber 10, a cooler 11, a bag dust collector 12 and a flue gas scrubber 13. The gas pipe 9 is arranged between the gravity settling chamber 10 and the steam distillation cracking furnace 1, and the gravity settling chamber 10, the cooler 11, the bag dust collector 12 and the flue gas scrubber 13 are connected in sequence.

[0023] With the above technical solution, the waste gas first enters the gravity settling chamber 10 through the gas pipe 9, and the larger particles settle under the action of gravity. Then, the settled waste gas enters the cooler 11, and the harmful substances are further removed by lowering the temperature. Then, the cooled waste gas enters the bag filter 12, and the tiny particles are removed by the filter bag. Finally, the waste gas enters the flue gas scrubber 13, and the harmful gases and particles in the gas are removed by the scrubbing liquid to ensure that the waste gas meets the emission standards. The waste gas treatment device can effectively remove the harmful substances and particles in the waste gas, ensure environmental safety, and at the same time, through multi-stage treatment, the waste gas treatment efficiency is improved and the pollution to the environment is reduced.

[0024] In some embodiments, a one-way valve 14 is provided on the gas delivery pipe 9 .

[0025] By adopting the above technical solution, a one-way valve 14 is arranged on the gas transmission pipe 9 to ensure that the exhaust gas can only flow in one direction, prevent the exhaust gas from flowing back, ensure the normal operation of the exhaust gas treatment device, and ensure the stability and safety of the exhaust gas treatment device.

[0026] In some embodiments, the collection device includes a collection frame.

[0027] With the above technical solution, the collection device uses a collection box as a container to collect precious and rare metals extracted from the liquid oxygen negative pressure furnace 4, which is beneficial to subsequent processing and utilization.

[0028] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for recovering precious and rare metals, characterized in that: The invention comprises a crushing device, a steam distillation cracking furnace (1), a water tank (2), a conveying pipeline (3), a liquid oxygen negative pressure furnace (4), a collecting device and a waste gas treatment device, wherein the crushing device is located above the steam distillation cracking furnace (1), the conveying pipeline (3) is arranged between the bottom of the steam distillation cracking furnace (1) and the water tank (2), a cooling liquid is arranged in the water tank (2), the liquid oxygen negative pressure furnace (4) is connected to the water tank (2), the collecting device is connected to the liquid oxygen negative pressure furnace (4), and the waste gas treatment device is connected to the top of the steam distillation cracking furnace (1).

2. A precious and rare metal recovery device according to claim 1, characterized in that: A linear track (5) is arranged inside the liquid oxygen negative pressure furnace (4).

3. The device for recovering precious and rare metals according to claim 1, characterized in that: The crushing device comprises a crushing barrel (6), a motor (61), a crushing rod (7) and a discharge port (8); the crushing barrel (6) is arranged above the steam distillation cracking furnace (1); the motor (61) is arranged on the top of the crushing barrel (6); the crushing rod (7) is arranged on the output shaft of the motor (61); the crushing rod (7) is located in the crushing barrel (6); and the discharge port (8) is arranged at the bottom of the crushing barrel (6).

4. The device for recovering precious and rare metals according to claim 1, characterized in that: The exhaust gas treatment device comprises an air supply pipe (9), a gravity settling chamber (10), a cooler (11), a bag filter (12) and a flue gas scrubber (13); the air supply pipe (9) is arranged between the gravity settling chamber (10) and the steam distillation cracking furnace (1); and the gravity settling chamber (10), the cooler (11), the bag filter (12) and the flue gas scrubber (13) are connected in sequence.

5. The device for recovering precious and rare metals according to claim 4, characterized in that: The gas delivery pipe (9) is provided with a one-way valve (14).

6. The device for recovering precious and rare metals according to claim 1, characterized in that: The collecting device comprises a collecting frame.

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