Circuit board pickling equipment and pickling method thereof

Abstract

The invention discloses circuit board pickling equipment and a pickling method, and belongs to the technical field of waste water recycling treatment.The pickling equipment comprises a sedimentation tank and further comprises a mixing assembly and a pickling assembly, the mixing assembly comprises a mixing cavity, the mixing cavity is communicated with an air pipe and a spraying pipe, and a liquid outlet is formed in the bottom of the mixing cavity; the driving assembly comprises a columnar cavity and a first driving rod arranged at one end of the columnar cavity in a guiding mode, the columnar cavity comprises a liquid inlet and a liquid outlet, and the liquid inlet communicates with the liquid outlet; the heat exchange assembly is arranged in the sedimentation tank and is connected with the upper end part of the first driving rod, and a heat exchange runner communicated with the liquid outlet is formed in the heat exchange assembly; the driving assembly is configured to be capable of driving the first driving rod to reciprocate in the axial direction when liquid flows through the columnar cavity from the mixing assembly so as to drive the heat exchange assembly to move, through the arrangement mode, acid mist treatment is utilized for acid-base neutralization to generate heat to exchange heat with waste water, the heat exchange assembly is driven to reciprocate in the vertical direction to disturb the waste water, and the heat exchange efficiency is improved. The wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater recycling and treatment, in particular to a circuit board pickling device and a pickling method thereof. Background Art

[0002] During the pickling process of circuit boards, pickling wastewater is generated. The pickling wastewater contains metal ions, and direct discharge of the wastewater causes serious environmental pollution. At present, the commonly used method is to add chemicals to the wastewater to react with metal ions to generate precipitates, thereby achieving the effect of wastewater treatment.

[0003] Sedimentation tanks are commonly used equipment for settling sediments in wastewater. Improving sedimentation efficiency is a key and effective means to improve the efficiency and treatment effect of wastewater treatment in sedimentation tanks. Therefore, there are a large number of technologies in the prior art to improve sedimentation efficiency. For example, Chinese invention patent application number 2024116427513 discloses a pickling wastewater treatment device, which adopts a technology to reduce short-flow and turbulence of water flow in the sedimentation tank and improve the mixing uniformity of flocculant and wastewater by mixing means to improve the sedimentation effect, which is beneficial to the flocculation of sediment in the wastewater. However, it is only achieved by improving the mixing uniformity of the agent and wastewater and increasing the residence time of the wastewater in the first sedimentation tank, and has little effect on the reaction rate between the agent and the metal ions in the wastewater.

[0004] During the wastewater flocculation process, appropriately increasing the wastewater temperature and performing appropriate stirring and disturbance can help enhance the reaction between the reagent and the wastewater, thereby effectively increasing the flocculation rate within the wastewater. During the actual pickling process of circuit boards, a large amount of acid mist is generated above the pickling tank. Currently, the acid mist is mostly treated by suctioning it with a negative pressure fan and removing it from the exhaust gas by spraying alkali solution. Since the acid mist reacts with the alkali solution after being sprayed, it generates heat, which is currently directly lost. Therefore, how to use the heat generated by the acid mist removal to heat the sedimentation tank and improve the flocculation effect is of great significance. Summary of the Invention

[0005] The object of the present invention is to solve the above problems and provide a circuit board pickling device and a pickling method thereof.

[0006] To achieve the above object, the technical solution of the present invention is: a circuit board pickling device, including a sedimentation tank, and also including: The mixing assembly includes a mixing chamber, the mixing chamber is connected to an air pipe and a spray pipe, and a drain port is provided at the bottom; A drive assembly includes a cylindrical cavity and a first drive rod guided at one end of the cylindrical cavity, wherein the cylindrical cavity includes a liquid inlet and a liquid outlet, and the liquid inlet is connected to the liquid outlet; a heat exchange assembly disposed in the sedimentation tank and connected to the upper end of the first driving rod, wherein a heat exchange flow channel communicating with the liquid outlet is formed inside the heat exchange assembly; The driving assembly is configured to drive the first driving rod to reciprocate along the axial direction when the liquid flows from the mixing assembly through the cylindrical cavity, thereby driving the heat exchange assembly to move.

[0007] Furthermore, the columnar cavity and the first driving rod are both arranged vertically, an internal channel is provided in the first driving rod, and the liquid outlet is a port of the internal channel.

[0008] Furthermore, the driving assembly further includes: A driving plate is slidingly guided and arranged in the cylindrical cavity, connected to the first driving rod, and a channel is provided through the driving plate; an elastic member, disposed between the cylindrical cavity and the driving plate, for providing a downward elastic force to the driving plate; The communication component is arranged between the columnar cavity and the liquid inlet, and cooperates with the driving plate to change the flow area when the driving plate reciprocates.

[0009] Furthermore, the liquid inlet is arranged below the driving plate, and the first driving rod guide is arranged at the upper end of the cylindrical cavity; the elastic member is a compression spring, and its two ends are respectively in contact with the driving plate and the upper end of the cylindrical cavity.

[0010] Furthermore, the connectivity component includes: The second driving rod is connected to the lower surface of the driving plate, and is provided with a second port and a third port at both ends, and a flow channel connecting the second port and the third port is provided inside; The matching piece is provided at the lower end of the cylindrical cavity, and is provided with a chamber in communication with the liquid inlet. The upper end of the chamber is provided with a guide hole for sealing and guiding the second driving rod; The shielding member is arranged on the second driving rod and can be switched between the state of opening and shielding the second opening or the third opening.

[0011] Furthermore, the matching piece is a columnar piece, which is plugged into and matched with the lower end of the columnar cavity, and at least one of the first driving rod and the second driving rod is detachably fixedly connected to the driving plate.

[0012] Furthermore, the liquid outlet is arranged on the side wall of the columnar member, a second liquid pipe corresponding to the liquid outlet is provided on the columnar cavity, an edge plate is provided at the lower end of the columnar member, the edge plate is provided with at least one positioning portion, and the side wall of the columnar cavity is provided with a second positioning portion corresponding to the positioning portion.

[0013] Furthermore, a groove body is provided at the upper end portion of the columnar member, an opening of the groove body is detachably sealed and fitted with a flange plate, and the second driving rod is guide-plugged and fitted with the flange plate.

[0014] Furthermore, the heat exchange component includes: a connecting pipe, rigidly arranged and connected to the first driving rod; a support frame connected to the connecting pipe; The heat exchange tubes are connected to a support frame, the heat exchange tubes are connected to the connecting pipe, and the density of the support frame is less than the density of the pickling liquid.

[0015] Furthermore, the present application also provides a circuit board pickling method, which is performed using any of the circuit board pickling equipment described above, comprising the following steps: Step 1: pickling the parts, and collecting the pickling waste gas containing acid mist during the pickling process; Step 2: The waste gas is transported to the mixing component of the pickling tank, and the waste gas is mixed with the alkali solution through the mixing component, and heat is released during the mixing process; Step 3: The liquid in the mixing component is transported through the driving component to the heat exchange component. The driving component is driven by the liquid to reciprocate, driving the heat exchange component to reciprocate, disturbing the wastewater in the sedimentation tank. The liquid exchanges heat with the wastewater through the heat exchange component.

[0016] The circuit board pickling equipment and pickling method disclosed in the present invention have the following beneficial effects compared with the prior art: the acid mist generated during pickling is passed into the mixing component, and the mixed fluid is then passed through the driving component and the heat exchange component in sequence. The acid and alkali in the fluid are neutralized to generate heat, and heat is exchanged with the wastewater through the heat exchange tube. When flowing through the driving component, the first driving rod can be driven to reciprocate in the axial direction, and the heat exchange component can be driven to reciprocate in the vertical direction to disturb the wastewater, thereby improving the efficiency of flocculation in the wastewater, improving the wastewater treatment efficiency, and effectively utilizing the waste heat generated during the treatment of acid mist waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a circuit board pickling device according to the present invention.

[0018] Figure 2 The figure is a bottom view structural schematic diagram of a circuit board pickling equipment according to the present invention.

[0019] Figure 3 This is a structural schematic diagram of a hidden liquid tank in a circuit board pickling equipment according to the present invention.

[0020] Figure 4 The figure is a schematic top view of the structure of a circuit board pickling equipment according to the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the connection between the heat exchange component, the drive component, and the mixing component in one embodiment of the circuit board pickling equipment of the present invention. Figure 1 .

[0022] Figure 6This is a schematic diagram of the structure of the connection between the heat exchange component, the drive component, and the mixing component in one embodiment of the circuit board pickling equipment of the present invention. Figure 2 .

[0023] Figure 7 This is a schematic cross-sectional structural diagram of the connections among a heat exchange component, a drive component, and a mixing component in one embodiment of a circuit board pickling device of the present invention.

[0024] Figure 8 This is a schematic diagram of the internal structure of the mixing components connected in one embodiment of a circuit board pickling equipment of the present invention.

[0025] Figure 9 This is a schematic structural diagram of a drive assembly in an embodiment of a circuit board pickling device of the present invention.

[0026] Figure 10 A schematic diagram of the cross-sectional structure of a drive assembly in an embodiment of a circuit board pickling device of the present invention Figure 1 .

[0027] Figure 11 A schematic diagram of the cross-sectional structure of a drive assembly in an embodiment of a circuit board pickling device of the present invention Figure 2 .

[0028] Figure 12 This is a schematic diagram of the connection structure of a matching piece, a driving plate, a first driving rod and a second driving rod in an embodiment of a circuit board pickling device of the present invention.

[0029] Figure 13 This is a structural schematic diagram of a second driving rod, a flange plate and a driving plate in a first state in an embodiment of a circuit board pickling equipment of the present invention.

[0030] Figure 14 This is a structural schematic diagram of a second driving rod, a flange plate and a driving plate in a second state in an embodiment of a circuit board pickling equipment of the present invention.

[0031] Figure 15 This is a schematic diagram of the connection structure of the second driving rod, the flange plate and the driving plate end in an embodiment of a circuit board pickling equipment of the present invention.

[0032] Figure 16 This is a schematic structural diagram of an end plate in an embodiment of a circuit board pickling device of the present invention.

[0033] Figure 17 The figure is a schematic structural diagram of a valve component in a circuit board pickling device according to the present invention.

[0034] In the figure: 1, sedimentation tank; 10, tank body; 2, liquid tank; 20, first liquid pipe; 21, pump body; 3, drive assembly; 30, housing; 300, columnar cavity; 31, first drive rod; 310, first flange joint; 311, internal channel; 3110, liquid outlet; 312, first port; 313, valve member; 3130, flow groove; 3131, first cone; 32, fitting; 320, flange plate; 321, tank body; 322, liquid inlet; 323, positioning part; 33, compression spring; 34, drive plate; 340, channel; 35, first Two driving rods; 350, second port; 351, third port; 36, end plate; 360, receiving groove; 361, permanent magnet; 37, sleeve; 38, second elastic member; 4, mixing assembly; 40, mixing chamber; 401, drain port; 41, spray pipe; 410, spray head; 42, air pipe; 43, second liquid pipe; 5, heat exchange assembly; 50, output pipe; 51, flexible pipe; 52, heat exchange pipe; 520, first annular pipe; 5201, core pipe; 521, second annular pipe; 522, connecting pipe; 5220, second flange joint; 53, support frame. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0036] Example 1 Please refer to Figure 1-7 The technical solution of the present invention is: a circuit board pickling device, including a sedimentation tank 1, and also including: The mixing assembly 4 includes a mixing chamber 40 , which is connected to an air pipe 42 and a spray pipe 41 , and has a drain port 401 at the bottom; The drive assembly 3 includes a cylindrical cavity 300 and a first drive rod 31 provided at one end of the cylindrical cavity 300. The cylindrical cavity 300 includes a liquid inlet 322 and a liquid outlet 3110. The liquid inlet 322 is connected to the liquid outlet 401. The heat exchange component 5 is disposed in the sedimentation tank 1 and connected to the upper end of the first driving rod 31. A heat exchange channel is formed inside the heat exchange component 5 and is connected to the liquid outlet 3110. The driving assembly 3 is configured to drive the first driving rod 31 to reciprocate along the axial direction when the liquid flows from the mixing assembly 4 through the cylindrical cavity 300, thereby driving the heat exchange assembly 5 to move.

[0037] Specifically, as a specific embodiment, the pickling equipment provided in the present application includes: an acid mist collection unit (not shown in the figure) is arranged above the pickling tank, wherein the acid mist collection unit is a technology commonly used in the pickling field, which adopts the principle of negative pressure suction to collect the acid mist above the pickling tank. In the present application, the acid mist collection unit (not shown in the figure) adopts the technology commonly used in the field, which will not be described in detail here, and should be understood by those skilled in the art.

[0038] refer to Figure 1-Figure 4 The structure of the sedimentation tank 1 is basically the same as that of the prior art. Both adopt partitions to separate and form multiple tank bodies 10. Multiple tank bodies 10 form a multi-stage sedimentation zone. In this application, a mixing component 4, a driving component 3 and a heat exchange component 5 are set in the tank body 10 corresponding to the first-stage sedimentation zone. Figure 5 、 Figure 8 The heat exchange component 5 is driven by the drive component 3, and the mixing component 4 includes a vertically arranged body, a mixing chamber 40 is formed in the body, a spray head 410 is provided on the top of the mixing chamber 40, the spray head 410 is connected to the spray pipe 41, and the side wall of the mixing chamber 40 is connected to the air pipe 42, and the air pipe 42 is connected to the acid mist collection unit. Figure 1 、 Figure 2 , also includes a liquid tank 2, the interior of the liquid tank 2 is used to configure alkali solution, the liquid tank 2 is connected to a pump body 21 through a first liquid pipe 20, and the output end of the pump body 21 is connected to the spray pipe 41. When working, the sedimentation tank 1 processes the pickling waste liquid of the previous batch. During the treatment process, when the circuit board is pickled, the acid mist collected by the acid mist collection unit (not shown in the figure) can be pumped to the mixing component 4. When the exhaust gas is pumped to the mixing component 4, the pump body 21 also starts to work, pumping alkali solution to the mixing component 4. The alkali solution is sprayed by the spray head 410 and mixed with the exhaust gas, and contacts with the acid mist and mixes with the acid to undergo a preliminary reaction, releasing a certain amount of heat. Due to the pumping pressure of the pump body 21 and the gas pressure of the airflow, the mixing chamber 40 has a pressure greater than The positive pressure of atmospheric pressure can discharge the mixed liquid and airflow together from the drain port 401, and then transport them to the drive component 3, enter from the liquid inlet 322 of the drive component 3, pass through the columnar cavity 300 and be discharged from the liquid outlet 3110, the alkali solution and the acid further react to release heat, and then flow into the heat exchange component 5, and further react to release heat after mixing in the heat exchange component 5, and exchange heat with the wastewater through the heat exchange tube 52. When flowing through the drive component 3, it can drive the first drive rod 31 to reciprocate in the axial direction, and drive the heat exchange component 5 to reciprocate in the vertical direction to disturb the wastewater, thereby improving the efficiency of flocculation in the wastewater and improving the wastewater treatment efficiency. The specific structure of the drive component 3 and its working principle are referred to below.

[0039] Further, as a specific implementation method, refer to Figure 7 、 Figures 9-11The columnar cavity 300 and the first driving rod 31 are both vertically arranged. An internal channel 311 is provided in the first driving rod 31 , and the liquid outlet 3110 is a port of the internal channel 311 .

[0040] Specifically, the drive assembly 3 includes a vertically arranged shell 30, with a cylindrical cavity 300 formed inside, a first drive rod 31 coaxially guided and arranged at the upper end of the shell 30, the upper end of the first drive rod 31 is provided with an internal channel 311, the lower end of the internal channel 311 is connected to a first port 312, the first port 312 passes through the side wall of the first drive rod 31 and is connected to the cylindrical cavity 300, the upper end of the first drive rod 31 is provided with a first flange joint 310, and the heat exchange assembly 5 is provided with a second flange joint 5220, which is detachably fixedly connected to the upper end of the first drive rod 31, and can be connected to the upper port of the internal channel 311 while being connected. This connecting structure is simpler and more convenient, facilitates the assembly and disassembly of the drive assembly 3 and the heat exchange assembly 5, and also facilitates the connection of the liquid circuit.

[0041] Further, as a specific implementation method, continue to refer to Figures 8-11 , the driving component 3 also includes: The driving plate 34 is slidingly guided and disposed in the cylindrical cavity 300 and connected to the first driving rod 31. A channel 340 is provided through the driving plate 34. an elastic member, disposed between the cylindrical cavity 300 and the driving plate 34 , for providing a downward elastic force to the driving plate 34 ; The communication component is disposed between the columnar cavity 300 and the liquid inlet 322 and is linked with the driving plate 34 to change the flow area when the driving plate 34 reciprocates.

[0042] Specifically, the housing 30 is arranged at the bottom of the sedimentation tank 1, and the internal guide is matched with a driving plate 34, the driving plate 34 is connected to the lower end of the first driving rod 31, the liquid inlet 322 is located below the driving plate 34, and a channel 340 is provided on the driving plate 34, wherein the flow area S0 of the channel 340 is smaller than the cross-sectional area S1 of the internal channel 311, and the elastic member can provide a downward elastic force to the driving plate 34. When working, the fluid is transported from the mixing component 4 to the liquid inlet 322 through the second liquid pipe 43, and then flows through the connecting component into the columnar cavity 300, wherein the connecting component is linked with the driving plate 34. Under the elastic force of the elastic member, when the driving plate 34 is in the initial state of contact with the bottom of the columnar cavity 300, the connecting component is in the state S2 with the largest flow area, where S2 ≥ S1. At this time, the fluid flows through the connecting component. When working, it is ensured that the supply flow of the flow component is greater than or equal to the rated flow volume when the flow area of ​​the connecting component is in the largest state. At this time, after entering the columnar cavity 300, the fluid passes through the channel 340 of the driving plate 34. Since S2> S0, the flow rate of the fluid flowing into the bottom of the driving plate 34 is greater than the flow rate passing through the driving plate 34, thereby increasing the pressure below the driving plate 34. The driving plate 34 is subjected to increased pressure from the fluid, and under the action of the pressure, the driving plate 34 moves upward against the elastic force of the elastic member. When the driving plate 34 moves upward, it pushes the first driving rod 31 to move upward, thereby achieving an upward driving effect. The fluid flowing through the channel 340 will flow out of the columnar cavity 300 through the internal channel 311 and the liquid outlet 3110 and flow into the heat exchange component 5. During the movement, the flow area of ​​the connecting component changes and switches to the minimum state S3, where S3 is smaller than the flow area S0 of the channel 340, thereby reducing the fluid flow rate flowing into the columnar cavity 300. At this time, the driving plate The speed at which the fluid below 34 flows to the top through the channel 340 is greater than the speed of the fluid flowing from the liquid inlet 322 to the bottom of the driving plate 34. Therefore, the pressure difference on both sides of the driving plate 34 is reduced. At this time, under the elastic force of the elastic member, the driving plate 34 moves downward. During the downward movement, the flow area of ​​the connecting component changes again to the maximum state S2, and so on and so forth, achieving the effect of reciprocating driving of the driving plate 34. In this way, during the reciprocating driving process, the fluid in the columnar cavity 300 will be disturbed and mixed, further improving the mixing effect of the fluid, so that the alkali solution and the acid mist can fully react and release heat.

[0043] Further, refer to Figure 10 、 Figure 11The liquid inlet 322 is positioned below the drive plate 34, and the first drive rod 31 is guided and positioned at the upper end of the columnar cavity 300. The elastic member is a compression spring 33, with its ends abutting the drive plate 34 and the upper end of the columnar cavity 300, respectively. Specifically, as a preferred embodiment, the elastic member is a compression spring 33, which is positioned above the drive plate 34 and sleeved onto the exterior of the first drive rod 31. This arrangement makes the drive assembly 3 compact, facilitating miniaturization.

[0044] Further, refer to Figure 10 、 Figure 17 A blind groove is provided coaxially with the internal channel 311 at the upper end of the first driving rod 31, and a valve member 313 is provided in the blind groove. By providing the valve member 313, the valve member 313 can be placed at the bottom of the blind groove under the action of its own gravity. At this time, the first conical surface 3131 of the valve member 313 fits with the conical surface of the bottom of the blind groove, which can prevent the fluid from passing through the internal channel 311 from top to bottom. When the fluid flows through the internal channel 311 from bottom to top, the fluid pushes the valve member 313 upward to leave the conical surface of the bottom of the blind groove. At this time, the fluid can flow through the flow groove 3130 on the side wall of the valve member 313, forming a unidirectional conduction effect. In addition, this method further facilitates the mixing of liquids and the acid-base mixing reaction when the fluid flows through the flow groove.

[0045] Example 2 Please refer to Figure 12-16 The present invention provides a circuit board pickling device. Furthermore, the specific structure of the connecting component is as follows: the connecting component includes: The second driving rod 35 is connected to the lower surface of the driving plate 34, and has a second port 350 and a third port 351 at both ends, and a flow channel connecting the second port 350 and the third port 351; The fitting 32 is provided at the lower end of the cylindrical cavity 300 and has a chamber in communication with the liquid inlet 322. The upper end of the chamber has a guide hole for sealing and guiding the second driving rod 35. The shielding member is provided on the second driving rod 35 and can switch between opening and shielding the second opening 350 or the third opening 351 .

[0046] Specifically, refer to Figures 9-11The lower part of the shell 30 is open, and the bottom is plugged into a cylindrical fitting 32. The outer circumference of the fitting 32 is sealed with the inner circumference of the cylindrical cavity 300, and a cylindrical chamber is formed inside the fitting 32. The second driving rod 35 is arranged on the lower surface of the driving plate 34, and the lower end is plugged into the interior of the chamber. The interior of the second driving rod 35 is hollow, and a second port 350 is provided at the upper end and below the driving plate 34. A third port 351 is provided at the lower end extending into the chamber. The flow area of ​​the third port 351 and the second port 350 is equal. A liquid inlet 322 is provided on the side wall of the chamber. As a specific embodiment, the shielding member corresponds to the third port 351 and is arranged inside the chamber. When the driving plate 34 moves axially, it can drive the second driving rod 35 to move, so that the shielding member can switch between the two states of opening the third port 351 and shielding the third port 351. Figure 10 、 Figure 13 , the state at this time is that the blocking member blocks the third port 351, refer to Figure 14 At this time, the blocking member leaves the third opening 351 and opens the third opening 351 .

[0047] Specifically, the shielding member is set as follows: an end plate 36 is set at the lower end of the second driving rod 35, and a permanent magnet 361 is set on the side of the end plate 36 close to the shielding member, and the shielding member is a sleeve 37 that is slidably sleeved on the outside of the second driving rod 35. The sleeve 37 adopts a magnetic attraction with the permanent magnet 361 or is provided with a magnet that magnetically cooperates with the permanent magnet 361. When the permanent magnet 361 magnetically attracts the shielding member, the shielding member abuts against the end plate 36. At this time, the third port 351 can be completely or partially blocked. At this time, the flow area of ​​the connecting component is in a minimum state. A receiving groove 360 ​​is provided on the end plate 36, and the permanent magnet 361 is provided in the receiving groove 360.

[0048] Specifically, a second elastic member 38 is provided between the upper end of the chamber and the shielding member, and the second elastic member 38 can provide an upward elastic force to the shielding member; when the shielding member is separated from the permanent magnet 361, the shielding member is in the state of being ... Figure 14In the state shown, the flow area is the largest at this time. During operation, the fluid flows through the third port 351 and the second port 350 into the cylindrical cavity 300, pushing the drive plate 34 to move upward, and the drive plate 34 drives the second drive rod 35 to move upward. The distance between the end plate 36 and the shielding member is getting closer and closer, and the magnetic attraction between the permanent magnet 361 and the shielding member increases. The shielding member gradually blocks the third port 351, and the magnetic attraction between the permanent magnet 361 and the shielding member is controlled to ensure that when the third port 351 is about 1 / 2 blocked , where 1 / 2S2≥S0, under the action of magnetic attraction, the shielding member can be pulled to stretch the second elastic member 38 toward the end plate 36, and the shielding member abuts against the end plate 36 so that the permanent magnet 361 and the shielding member are magnetically attracted. At this time, the shielding member blocks the third port 351, and the connecting component is in a state of minimum flow. At this time, the elastic force of the compression spring 33 pushes the driving plate 34 downward. During the downward movement, the shielding member is driven to move together under the magnetic force of the permanent magnet 361 until it moves to the position as shown in the figure. Figure 10 As shown in the position, the shielding member remains in the state of shielding the third opening 351, and the second elastic member 38 is stretched to increase the elastic force of the second elastic member 38. At this time, the driving plate 34 is spaced a certain distance from the end of the matching member 32. At this time, the second elastic member 38 reaches the maximum stretching amount or the elastic force of the second elastic member 38 is equal to the magnetic attraction between the permanent magnet 361 and the shielding member. As the driving plate 34 continues to move, the shielding member is separated from the end plate 36 and returns to the position under the action of the elastic force. Figure 14 In the state shown, the connecting component is switched to the state with the largest flow area, and the driving plate 34 moves upward, and so on.

[0049] As a specific implementation, the second elastic member 38 can be a tension spring made of acid- and alkali-resistant alloy materials such as 0Cr17Mn13N, 0Cr20Ni24Si4Ti, 1Cr12Ni4Mn5Mo3Al, or a rubber ring made of fluororubber or EPDM rubber to adapt to the working environment.

[0050] As a specific embodiment, refer to Figure 11 The drive plate 34 is detachably connected to the first drive rod 31 through a threaded connection, the second drive rod 35 is integrally arranged with the drive plate 34 by welding, and the end plate 36 is connected to the lower end of the second drive rod 35 by a threaded connection. Through the above-mentioned setting method, the matching piece 32 and the shell 30 are detachably plugged in at the same time, which is convenient for the assembly of the drive component 3. The overall structure is reasonable and conducive to use and subsequent maintenance.

[0051] Further, as a preferred embodiment, refer to 10, Figure 12The liquid outlet 3110 is provided on the side wall of the columnar member, and a second liquid pipe 43 corresponding to the liquid outlet 3110 is provided on the columnar cavity 300. The lower end of the columnar member is provided with an edge plate, and the edge plate is provided with at least one positioning portion 323. The side wall of the columnar cavity 300 is provided with a second positioning portion 323 corresponding to the positioning portion 323. Specifically, by providing the fitting 32 as a columnar structure that plugs into the columnar cavity 300, the fitting 32 and the columnar cavity 300 can be detachably plugged in, thereby facilitating subsequent maintenance of the drive assembly 3. Adaptively, the liquid inlet 322 on the side wall of the fitting 32 is connected to the second liquid pipe 43 on the side wall of the housing 30. In order to ensure the corresponding fit between the liquid inlet 322 and the second liquid pipe 43, reference is made to FIG. Figure 11 、 Figure 12 A lip plate is provided at the end of the fitting 32, and a positioning protrusion is provided on the lip plate. A positioning groove is provided on the fitting 32 to be plugged into the positioning protrusion, so that the fitting 32 and the housing 30 can be positioned by the positioning protrusion to ensure that the liquid inlet 322 corresponds to the second liquid pipe 43.

[0052] Further, as a preferred embodiment, refer to Figure 10 、 Figure 11 To ensure the stability of the columnar member, a groove 321 is provided at the upper end of the columnar member. The opening of the groove 321 is removably and sealedly engaged with a flange plate 320. The second drive rod 35 is guided and plugged into the flange plate 320. By providing the groove 321 at the end of the columnar member and removably and fixedly connecting the end of the groove 321 to the flange plate 320, a cavity is formed between the flange plate 320 and the groove 321. The second drive rod 35 is guided and sealed in the through hole in the middle of the flange plate 320. This arrangement facilitates assembly and subsequent maintenance.

[0053] Specifically, hooks are provided on both the flange plate 320 and the shielding member, and both ends of the second elastic member 38 are engaged with the two hooks.

[0054] Further, refer to Figure 10 A through hole is provided at the bottom of the groove body 321 of the fitting 32. In specific use, the through hole can be connected to an external pipeline. A control valve is also provided on the pipeline. The control valve is in a normally closed state. When there is no acid mist treatment, the accumulated liquid in the groove body 321 can be discharged by opening the control valve.

[0055] Furthermore, the fitting member 32 is a columnar member, which is plugged into and matched with the lower end of the columnar cavity 300 , and at least one of the first driving rod 31 and the second driving rod 35 is detachably fixedly connected to the driving plate 34 .

[0056] Example 3 Please refer to Figure 5-Figure 7 The present invention provides a circuit board pickling device. As an embodiment, the heat exchange component 5 includes: The connecting pipe 522 is rigidly provided and connected to the first guide rod; Support frame 53, connected to connecting pipe 522; The heat exchange tubes 52 and the support frame 53 connect the plurality of heat exchange tubes 52 . The heat exchange tubes 52 are connected to the connecting pipe 522 . The density of the support frame 53 is less than the density of the pickling liquid.

[0057] Specifically, a first ring tube 520 and a second ring tube 521 are evenly provided on the upper and lower sides of the connecting tube 522, and a plurality of heat exchange tubes 52 are arranged between the first ring tube 520 and the second ring tube 521. The two ends of the heat exchange tube 52 are respectively connected to the first ring tube 520 and the second ring tube 521. The connecting tube 522 is a U-shaped structure, and a second flange joint 5220 is provided in the middle area, which is connected to the upper end of the first driving rod 31. The connecting tube 522 is welded with a hollow tube body to form a support frame 53. The hollow tube is not connected to the inside of the heat conduction tube. Through this arrangement, the hollow tube can float in the wastewater, and the heat exchange component 5 does not provide buoyancy, thereby reducing the upward driving force of the driving component 3, ensuring that the driving component 3 can effectively drive the heat exchange component 5 to move upward.

[0058] Further, refer to Figure 7 The first annular tube 520 and the second annular tube 521 are made of corrosion-resistant heat-conducting material. A hollow core tube 5201 is provided inside the first annular tube 520 and the second annular tube 521 along the extension direction. The core tube 5201 is a thin-walled part. In this way, the core tube 5201 occupies the internal space of the annular tube. When the fluid flows, the space occupied by the fluid in the annular tube is reduced, so that the buoyancy of the entire heat exchange component 5 is smaller than its own gravity, and the difference is small, which is more conducive to the driving component 3 to drive the heat exchange component 5 to move. In addition, through this setting, when the heat exchange component 5 reciprocates up and down, it is subject to the resistance of the wastewater, so that the reciprocating motion frequency is low, thereby generating a small disturbance effect, which can effectively avoid the problem of excessive disturbance that is not conducive to flocculation.

[0059] Furthermore, the second ring pipe 521 is connected to a corrugated flexible pipe 51 , and the other end of the flexible pipe 51 is connected to an output pipe 50 . The output pipe 50 extends out of the side wall of the sedimentation tank and communicates with the liquid tank 2 .

[0060] It should be noted that the above-mentioned specific structure of the heat exchange component 5 is merely exemplary. In actual application, the structure can be modified according to the flow characteristics of the fluid and the internal space of the sedimentation tank.

[0061] Example 4 The present application also provides a circuit board pickling method, which is performed using any one of the circuit board pickling devices of Example 1, Example 2, and Example 3, and includes the following steps: Step 1: pickling the parts, and collecting the pickling waste gas containing acid mist during the pickling process; Step 2: The waste gas is transported to the mixing component 4 of the pickling tank, and the waste gas is mixed with the alkali solution through the mixing component 4, and heat is released during the mixing process; Step three: transport the liquid in the mixing component 4 through the driving component 3 to the heat exchange component 5. The driving component 3 is driven by the liquid to reciprocate, driving the heat exchange component 5 to reciprocate, disturbing the wastewater in the sedimentation tank 1. The liquid exchanges heat with the wastewater through the heat exchange component 5.

[0062] Through the above method, the heat generated during the pickling acid mist treatment can be effectively utilized to promote the precipitation efficiency in the precipitation tank, and energy can also be effectively utilized, which has the beneficial effect of saving energy.

[0063] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A circuit board pickling device, comprising a sedimentation tank (1), characterized in that: Also includes: A mixing assembly (4) includes a mixing chamber (40), the mixing chamber (40) is connected to an air pipe (42) and a spray pipe (41), and a liquid discharge port (401) is provided at the bottom; A drive assembly (3) comprising a columnar cavity (300) and a first drive rod (31) guided and arranged at one end of the columnar cavity (300), wherein the columnar cavity (300) comprises a liquid inlet (322) and a liquid outlet (3110), and the liquid inlet (322) is communicated with the liquid outlet (401); A heat exchange component (5) is disposed in the sedimentation tank (1) and is connected to the upper end of the first driving rod (31). A heat exchange flow channel communicating with the liquid outlet (3110) is formed inside the heat exchange component (5); The driving assembly (3) is configured to drive the first driving rod (31) to reciprocate along the axial direction when the liquid flows from the mixing assembly (4) through the columnar cavity (300), thereby driving the heat exchange assembly (5) to move.

2. A circuit board pickling equipment according to claim 1, characterized in that: The columnar cavity (300) and the first driving rod (31) are both arranged vertically; an internal channel (311) is provided in the first driving rod (31); and the liquid outlet (3110) is a port of the internal channel (311).

3. A circuit board pickling equipment according to claim 1, characterized in that: The driving assembly (3) further comprises: A driving plate (34) is provided in a sliding guide fit within the columnar cavity (300) and is connected to the first driving rod (31). A channel (340) is provided through the driving plate (34); an elastic member, disposed between the columnar cavity (300) and the drive plate (34), and configured to provide a downward elastic force to the drive plate (34); The communication component is arranged between the columnar cavity (300) and the liquid inlet (322), and is linked with the driving plate (34), and can change the flow area when the driving plate (34) reciprocates.

4. A circuit board pickling equipment according to claim 3, characterized in that: The liquid inlet (322) is arranged below the driving plate (34), and the first driving rod (31) is guided and arranged at the upper end of the columnar cavity (300); the elastic member is a compression spring (33), and its two ends are respectively in contact with the driving plate (34) and the upper end of the columnar cavity (300).

5. A circuit board pickling equipment according to claim 4, characterized in that: The connectivity component includes: A second driving rod (35) is connected to the lower surface of the driving plate (34), and is provided with a second port (350) and a third port (351) at both ends, and a flow channel communicating with the second port (350) and the third port (351) is provided inside; A matching piece (32) is provided at the lower end of the columnar cavity (300), and is provided with a chamber in communication with the liquid inlet (322) therein, and a guide hole is provided at the upper end of the chamber for sealing and guiding the second driving rod (35); The shielding member is provided on the second driving rod (35) and can switch between the state of opening and shielding the second opening (350) or the third opening (351).

6. A circuit board pickling equipment according to claim 5, characterized in that: The mating piece (32) is a columnar piece that is plugged into and mated with the lower end of the columnar cavity (300). At least one of the first driving rod (31) and the second driving rod (35) is detachably fixedly connected to the driving plate (34).

7. A circuit board pickling equipment according to claim 6, characterized in that: The liquid outlet (3110) is provided on the side wall of the columnar member, a second liquid pipe (43) corresponding to the liquid outlet (3110) is provided on the columnar cavity (300), an edge plate is provided at the lower end of the columnar member, the edge plate is provided with at least one positioning portion (323), and a second positioning portion (323) corresponding to the positioning portion (323) is provided on the side wall of the columnar cavity (300).

8. A circuit board pickling equipment according to claim 7, characterized in that: A groove body (321) is provided at the upper end of the columnar member, and an opening of the groove body (321) is detachably sealed and fitted with a flange plate (320), and the second driving rod (35) is guide-plugged and fitted with the flange plate (320).

9. A circuit board pickling equipment according to claim 1, characterized in that: The heat exchange component (5) comprises: A connecting pipe (522), rigidly arranged and connected to the first driving rod (31); A support frame (53) connected to the connecting pipe (522); The heat exchange tubes (52) are connected to a support frame (53) for connecting the plurality of heat exchange tubes (52). The heat exchange tubes (52) are connected to the connecting pipe (522). The density of the support frame (53) is less than the density of the pickling liquid.

10. A circuit board pickling method, characterized in that: The circuit board pickling device according to any one of claims 1 to 9 is used, comprising the following steps: Step 1: pickling the parts, and collecting the pickling waste gas containing acid mist during the pickling process; Step 2: The waste gas is transported to the mixing assembly (4) of the pickling tank, and the waste gas is mixed with the alkali solution through the mixing assembly (4), and heat is released during the mixing process; Step 3: The liquid in the mixing component (4) is transported through the driving component (3) to the heat exchange component (5). The driving component (3) is driven by the liquid to reciprocate, driving the heat exchange component (5) to reciprocate, thereby disturbing the wastewater in the sedimentation tank (1). The liquid exchanges heat with the wastewater through the heat exchange component (5).

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