Waste circuit board tin stripping liquid cyclic regeneration tin extraction system

Abstract

The utility model relates to the technical field of tin extraction, in particular to a waste circuit board tin stripping liquid cyclic regeneration tin extraction system, which comprises a platform, a reaction cylinder, a funnel and a storage box, wherein the reaction cylinder is arranged on the platform and is used for mixing tin stripping liquid and tin extraction raw materials, the funnel is used for discharging waste liquid, and the storage box is used for storing the tin extraction raw materials. A top cover, a conveying pipe for conveying tin extraction raw materials, a meter for monitoring the flow of the conveying pipe and a pump for conveying the tin extraction raw materials into the conveying pipe are arranged on the reaction cylinder, the platform is of a rectangular structure with a transparent bottom and an opening in one side, the reaction cylinder is placed on the upper surface of the platform, the funnel is installed in the center of the top of the platform, and the storage box is arranged on the outer side of the platform. The top cover is mounted at the upper end of the reaction cylinder; one ends of the two conveying pipes are connected with the top cover. The metering device is used for calculating the adding amount of tin extraction raw materials, the one-way valve is used for preventing gas in the reaction cylinder from polluting the tin extraction raw materials along the conveying pipe, filtering is carried out after solid-liquid separation, and metal precipitates and waste liquid are rapidly separated.

Description

Technical Field

[0001] The utility model relates to the technical field of tin extraction, in particular to a tin extraction system for recycling and regenerating tin stripping liquid of waste circuit boards. Background Art

[0002] After the tin stripping liquid comes into contact with electronic components such as waste circuit boards, the tin element will be dissolved into the tin stripping liquid to form waste liquid. Generally, it is necessary to re-extract the tin from the waste liquid and re-invest the tin stripping liquid into the tin stripping production line to save money and protect the environment. However, the traditional tin extraction method is inefficient and difficult to match the factory's production capacity needs. Therefore, an efficient tin stripping liquid recycling and regeneration tin extraction system is needed to increase production capacity.

[0003] Chinese patent CN115261623A discloses a nitric acid type tin stripping liquid recycling regeneration tin extraction system, including: a precipitation module, a solid-liquid separation module, a regeneration liquid storage and adjustment module and a tail gas and tail liquid treatment module. The scheme is to add a precipitant, a precipitation aid and a flocculant to the tin stripping waste liquid, so that the metal ions in the waste liquid exist in the form of precipitation, and the metal precipitation and the upper clear liquid are separated by a solid-liquid separation device. The precipitation can be directly sold to the smelter to smelt elemental tin, and the filtrate enters the regeneration liquid storage and preparation module, and the filtrate is adjusted to adjust the composition so that its various indicators meet the requirements of production. At this time, it can be called a regeneration sub-liquid, which is automatically added and returned to the tin stripping production line for use through specific gravity control, thereby realizing the recycling of resources and zero discharge of waste liquid. The scheme can save energy and reduce emissions, recycle resources, and does not generate new pollution sources. The whole system has no wastewater discharge, which saves costs for enterprises and improves their economic benefits.

[0004] There are still several points for improvement in the above scheme: the dosage of tin extraction raw materials cannot be accurately added, which affects the quality of tin extraction; the upper clear liquid is easy to carry some metal precipitation when it is extracted, which is easy to cause waste. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides a waste circuit board tin stripping liquid recycling and tin extraction system, comprising a platform and a reaction cylinder installed on the platform for mixing tin stripping liquid and tin extraction raw materials, a funnel for discharging waste liquid and a storage box for storing the tin extraction raw materials, the reaction cylinder is provided with a top cover, a delivery pipe for transporting the tin extraction raw materials, a meter for monitoring the flow of the delivery pipe and a pump for delivering the tin extraction raw materials into the delivery pipe, the platform is a rectangular structure with a transparent bottom and an opening on one side, the reaction cylinder is placed on the upper surface of the platform, the funnel is installed at the top center of the platform, the storage box is arranged on the outside of the platform, the top cover is installed on the upper end of the reaction cylinder, one end of the two delivery pipes is connected to the top cover, and the other end is connected to the top of the corresponding pump, the meter is arranged on the delivery pipe, and the side of the pump is connected with the storage box.

[0006] Preferably, a ball valve and a one-way valve are provided on the delivery pipe. The ball valve is provided in a section of the delivery pipe parallel to the ground, and the one-way valve is provided at the pipe mouth of the delivery pipe and above the top cover.

[0007] Preferably, a handle is installed at the top of the ball valve, a positioning platform, a first spring and a top ball are provided in the one-way valve, the positioning platform is installed at the mouth of the delivery pipe, one end of the first spring is connected to the positioning platform, and the other end is connected to the top ball.

[0008] Preferably, the meter is provided with an induction probe and an indicator, the induction probe is installed at the bottom of the meter and is located in the delivery pipe and is aligned with the top of the pump, and the indicator is installed directly above the meter.

[0009] Preferably, a sealing box, a base frame, a discharge hole and a rotating shaft are provided in the funnel, the sealing box is installed at the center of the funnel, the base frame is arranged at the bottom of the sealing box, the discharge hole is installed at the bottom of the funnel, and the rotating shaft passes through the side wall of the platform and is connected to the funnel.

[0010] Preferably, a column is installed at the inner center of the sealing box, a baffle is rotatably connected to the column, the gap array is arranged on the surface of the sealing box, and the baffle is fitted with the bottom frame.

[0011] Preferably, a cover is provided at the center of the base frame, the outer side of the column is surrounded by the second spring and the second spring is connected to the cover.

[0012] Preferably, a cam, a cone wheel group and a knob are provided on the rotating shaft, the cone wheel group is installed in the middle of the rotating shaft and is located in the funnel, the cam is fixed on the rotating shaft and contacts the bottom of the sealing box, and the knob is installed at one end of the rotating shaft.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model uses a meter to calculate the amount of tin extraction raw materials to be added. Specifically, the meter is used to observe the liquid flow rate transported by the delivery pipe in order to calculate the ratio. The pump pressurizes the concentrated sulfuric acid and ammonia water in the storage box and delivers them into the delivery pipe. At the same time, the high-pressure impact facilitates the meter to obtain more accurate metering data.

[0015] 2. The utility model uses a one-way valve to prevent the gas in the reaction cylinder from contaminating the tin extraction raw material along the delivery pipe. Specifically, the ball valve is used to open or close the delivery pipe so as to stop adding the tin extraction raw material to the reaction cylinder in time, and the one-way valve is used to close the delivery pipe in one direction to prevent the gas generated in the reaction cylinder from reversely penetrating into the storage box through the delivery pipe.

[0016] 3. The utility model performs filtering after solid-liquid separation to quickly separate metal precipitates and waste liquid. Specifically, the sealing box serves as a filtering device to block the precipitated tin mud in the reaction cylinder, the bottom frame is used to seal the connection between the bottom of the sealing box and the funnel to prevent leakage, and the discharge hole discharges the waste liquid after solid-liquid separation out of the reaction cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of a system for recycling and regenerating tin from tin stripping liquid of waste circuit boards.

[0018] Figure 2 The present invention is a three-dimensional diagram of the top cover of a waste circuit board stripping liquid recycling and tin extraction system.

[0019] Figure 3 It is a three-dimensional diagram of a ball valve and a one-way valve in a recycling and regenerating tin extraction system for waste circuit board tin stripping liquid.

[0020] Figure 4 It is a three-dimensional diagram of a metering device in a recycling and regeneration tin extraction system for waste circuit board stripping liquid.

[0021] Figure 5 It is a three-dimensional diagram of a funnel in a recycling and regeneration tin extraction system for waste circuit board stripping liquid.

[0022] Figure 6 It is a three-dimensional diagram of a sealing box in a waste circuit board stripping liquid recycling and tin extraction system.

[0023] Figure 7 It is an inverted stereoscopic diagram of a cap in a recycling and regeneration tin extraction system for waste circuit board tin stripping liquid.

[0024] The numbers in the figure are: 1. platform; 2. reaction cylinder; 3. top cover; 4. delivery pipe; 41. ball valve; 411. handle; 42. one-way valve; 421. positioning platform; 422. first spring; 423. top ball; 5. meter; 51. induction probe; 52. indicator; 6. pump; 7. funnel; 71. sealing box; 711. column; 712. baffle; 713. gap; 72. base frame; 721. second spring; 722. sealing cover; 73. discharge hole; 74. rotating shaft; 741. cam; 742. cone wheel group; 743. knob; 8. storage box. DETAILED DESCRIPTION

[0025] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] See also Figure 1 to Figure 7As shown, a waste circuit board tin stripping liquid recycling and tin extraction system includes a platform 1 and a reaction cylinder 2 installed on the platform 1 for mixing tin stripping liquid and tin extraction raw materials, a funnel 7 for discharging waste liquid and a storage box 8 for storing tin extraction raw materials. The reaction cylinder 2 is provided with a top cover 3, a delivery pipe 4 for transporting tin extraction raw materials, a meter 5 for monitoring the flow of the delivery pipe 4 and a pump 6 for delivering the tin extraction raw materials into the delivery pipe 4. The platform 1 is a rectangular structure with a transparent bottom and an opening on one side. The reaction cylinder 2 is placed on the upper surface of the platform 1, the funnel 7 is installed at the top center of the platform 1, the storage box 8 is arranged on the outside of the platform 1, the top cover 3 is installed at the upper end of the reaction cylinder 2, one end of the two delivery pipes 4 is connected to the top cover 3, and the other end is connected to the top of the corresponding pump 6, the meter 5 is arranged on the delivery pipe 4, and the side of the pump 6 is connected to the storage box 8.

[0027] The tin extraction system adds concentrated sulfuric acid to the tin stripping waste liquid to oxidize the tin, iron, copper, etc. in the waste liquid to generate a metal sulfate solution, and then performs ammonia water addition and solid-liquid separation steps to facilitate the precipitation of tin hydroxide and minimize the precipitation of other metal hydroxides, so as to obtain higher quality tin mud after solid-liquid separation. When the system is used, the top cover 3 is first opened to add the tin stripping waste liquid to the reaction cylinder 2, and then the two delivery pipes 4 successively add concentrated sulfuric acid and ammonia water to the reaction cylinder 2 in a quantitative manner. The meter 5 is used to observe the liquid flow transported by the delivery pipe 4 in order to calculate the ratio. The pump 6 pressurizes the concentrated sulfuric acid and ammonia water in the storage box 8 and delivers them to the delivery pipe 4. At the same time, the high-pressure impact facilitates the meter 5 to obtain the metering data more accurately, and finally the funnel 7 completes the solid-liquid separation.

[0028] See also Figure 1 to Figure 3 As shown, a ball valve 41 and a one-way valve 42 are provided on the delivery pipe 4 . The ball valve 41 is provided in a section of the delivery pipe 4 parallel to the ground, and the one-way valve 42 is provided at the pipe mouth of the delivery pipe 4 and above the top cover 3 .

[0029] The ball valve 41 is used to open or close the delivery pipe 4 so as to stop adding the tin-extracting raw material to the reaction cylinder 2 in time. The one-way valve 42 is used to one-way close the delivery pipe 4 to prevent the gas generated in the reaction cylinder 2 from reversely penetrating into the storage box 8 through the delivery pipe 4.

[0030] See also Figure 3 As shown, a handle 411 is installed at the top of the ball valve 41, and a positioning platform 421, a first spring 422 and a top ball 423 are provided in the one-way valve 42. The positioning platform 421 is installed at the pipe mouth of the delivery pipe 4, one end of the first spring 422 is connected to the positioning platform 421, and the other end is connected to the top ball 423.

[0031] The handle 411 is used to facilitate the staff to open and close the ball valve 41 and adjust the liquid flow in the delivery pipe 4. The positioning platform 421 is used to install the first spring 422 and the top ball 423. When the tin extraction raw material enters the reaction tube 2 from the delivery pipe 4, the first spring 422 is compressed, and the top ball 423 is away from the one-way valve 42 to ensure the normal flow of the liquid. When the delivery pipe 4 stops adding liquid, the top ball 423 re-attaches to the one-way valve 42 and closes the reaction tube 2.

[0032] See also Figure 1 to Figure 4 As shown, the meter 5 is provided with a sensing probe 51 and an indicator gauge 52 . The sensing probe 51 is installed at the bottom of the meter 5 and is located in the delivery pipe 4 while being aligned with the top of the pump 6 . The indicator gauge 52 is installed directly above the meter 5 .

[0033] The sensing probe 51 is directly above the pump 6 to ensure that the pressurized tin-extracting raw materials can impact the sensing probe 51, reducing the measurement error caused by insufficient pipeline flow or pressure. The indicator 52 digitizes the liquid flow measured by the sensing probe 51 for easy calculation.

[0034] See also Figure 5 to Figure 7 As shown, the funnel 7 is provided with a sealing box 71, a base frame 72, a discharge hole 73 and a rotating shaft 74. The sealing box 71 is installed at the center of the funnel 7, the base frame 72 is arranged at the bottom of the sealing box 71, the discharge hole 73 is installed at the bottom of the funnel 7, and the rotating shaft 74 passes through the side wall of the platform 1 and is connected to the funnel 7.

[0035] The sealing box 71 serves as a filtering device to block the precipitated tin mud in the reaction tube 2. The base frame 72 is used to seal the connection between the bottom of the sealing box 71 and the funnel 7 to prevent leakage. The discharge hole 73 discharges the waste liquid after solid-liquid separation from the reaction tube 2. The rotating shaft 74 is rotated to open or close the filtering function of the funnel 7.

[0036] See also Figure 6 and Figure 7 As shown, a column 711 is installed at the inner center of the sealing box 71 , a baffle 712 is rotatably connected to the column 711 , an array of gaps 713 are arranged on the surface of the sealing box 71 , and the baffle 712 is in contact with the bottom frame 72 .

[0037] The column 711 serves as the rotation center of the baffle 712. The size and number of the baffle 712 and the gap 713 correspond to each other. When the baffle 712 and the gap 713 are separated, the gap 713 serves as a filter to block the tin mud. When the baffle 712 and the gap 713 are attached, the filtering function of the funnel 7 is closed.

[0038] See also Figure 6 As shown, a cover 722 is provided at the center of the base frame 72 , and the outer side of the column 711 is surrounded by a second spring 721 and the second spring 721 is connected to the cover 722 .

[0039] The sealing cover 722 is moved upward by the force of the rotating shaft 74 and connects the discharge hole 73 and the inside of the sealing box 71. At this time, the waste liquid is discharged from the funnel 7. When the rotating shaft 74 stops applying force to the sealing cover 722, the second spring 721 is used to quickly pull the sealing cover 722 back to its original position to quickly stop filtering.

[0040] See also Figure 5 and Figure 6 As shown, a cam 741, a cone wheel set 742 and a knob 743 are provided on the rotating shaft 74. The cone wheel set 742 is installed in the middle of the rotating shaft 74 and is located in the funnel 7. The cam 741 is fixed on the rotating shaft 74 and contacts the bottom of the sealing box 71. The knob 743 is installed at one end of the rotating shaft 74.

[0041] The knob 743 is used to facilitate the rotation of the shaft 74. When the shaft 74 rotates to a certain angle, the cam 741 lifts the cover 722, and at the same time the cone wheel group 742 drives the baffle 712 to rotate to start filtering. When the shaft 74 is rotated again, the cover 722 falls back and the baffle 712 closes the gap 713 again.

[0042] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A system for recycling and regenerating tin-extracting tin from a waste circuit board tin-stripping liquid, comprising a platform (1), a reaction cylinder (2) mounted on the platform (1) for mixing the tin-stripping liquid and tin-extracting raw materials, a funnel (7) for discharging waste liquid, and a storage box (8) for storing the tin-extracting raw materials; It is characterized in that The reaction cylinder (2) is provided with a top cover (3), a delivery pipe (4) for transporting tin extraction raw materials, a meter (5) for monitoring the flow of the delivery pipe (4), and a pump (6) for delivering the tin extraction raw materials into the delivery pipe (4); the platform (1) is a rectangular structure with a transparent bottom and an opening on one side; the reaction cylinder (2) is placed on the upper surface of the platform (1); the funnel (7) is installed at the top center of the platform (1); a storage box (8) is arranged outside the platform (1); the top cover (3) is installed at the upper end of the reaction cylinder (2); one end of the two delivery pipes (4) is connected to the top cover (3), and the other end is connected to the top of the corresponding pump (6); the meter (5) is arranged on the delivery pipe (4), and the side of the pump (6) is connected to the storage box (8).

2. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 1, characterized in that: A ball valve (41) and a one-way valve (42) are arranged on the delivery pipe (4). The ball valve (41) is arranged in a section of the delivery pipe (4) parallel to the ground, and the one-way valve (42) is arranged at the pipe mouth of the delivery pipe (4) and above the top cover (3).

3. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 2, characterized in that: A handle (411) is installed at the top end of the ball valve (41), and a positioning platform (421), a first spring (422) and a top ball (423) are provided in the one-way valve (42). The positioning platform (421) is installed at the pipe mouth of the delivery pipe (4), and one end of the first spring (422) is connected to the positioning platform (421), and the other end is connected to the top ball (423).

4. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 1, characterized in that: The meter (5) is provided with a sensing probe (51) and an indicator (52). The sensing probe (51) is installed at the bottom of the meter (5) and is located in the delivery pipe (4) and is aligned with the top of the pump (6). The indicator (52) is installed directly above the meter (5).

5. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 1, characterized in that: The funnel (7) is provided with a sealing box (71), a bottom frame (72), a discharge hole (73) and a rotating shaft (74); the sealing box (71) is installed at the center of the funnel (7); the bottom frame (72) is arranged at the bottom of the sealing box (71); the discharge hole (73) is installed at the bottom of the funnel (7); and the rotating shaft (74) passes through the side wall of the platform (1) and is connected to the funnel (7).

6. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 5, characterized in that: A column (711) is installed at the inner center of the sealing box (71), a baffle (712) is rotatably connected to the column (711), an array of gaps (713) is arranged on the surface of the sealing box (71), and the baffle (712) is fitted with the bottom frame (72).

7. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 6, characterized in that: A cover (722) is provided at the center of the base frame (72), the outer side of the column (711) is surrounded by a second spring (721), and the second spring (721) is connected to the cover (722).

8. A waste circuit board tin stripping liquid recycling and tin extraction system according to claim 5, characterized in that: A cam (741), a cone wheel group (742) and a knob (743) are arranged on the rotating shaft (74); the cone wheel group (742) is installed in the middle of the rotating shaft (74) and is located in the funnel (7); the cam (741) is fixed on the rotating shaft (74) and contacts the bottom of the sealing box (71); and the knob (743) is installed at one end of the rotating shaft (74).

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