An oil removal device for electroplated workpieces

Abstract

The present invention belongs to pre - electroplating treatment equipment, specifically referring to a degreasing device for electroplated workpieces, which includes a degreasing tank for storing liquid and degreasing electroplated workpieces; a liquid - level partitioning device located in the degreasing tank, which divides the liquid level in the degreasing tank into a degreasing area and an oil - collecting area, and makes the liquid levels in the degreasing area and the oil - collecting area not communicate with each other; and a floating oil remover located in the degreasing area of the degreasing tank, floating on the liquid surface of the degreasing area, collecting the floating oil in the degreasing area, and transporting the floating oil to the oil - collecting area through a first hose, only treating the liquid surface of the workpiece degreasing area, reducing the area of the degreasing liquid surface, improving the accuracy of removing floating oil, and enhancing the degreasing efficiency; the components removed in the degreasing area still remain in the degreasing tank, and the active agent removed by the floating oil remover can still be reused.

Description

Technical Field

[0001] The invention belongs to electroplating pre-treatment equipment, in particular to electroplating workpiece degreasing equipment. Background Art

[0002] Before electroplating, the workpiece must be degreased on its surface. Generally, it is soaked in a solution prepared with an active agent. The grease is emulsified and dispersed in the solution by the active agent. The alkaline degreaser and the emulsified oil droplets in the solution are mixed to form water-soluble fatty acids. Then clean water is used to soak and wash away the solution attached to the surface of the workpiece.

[0003] When using surfactants for cleaning, adding too much surfactant to the solution may cause the surfactant to precipitate on the surface of the solution, or the solution may be used for a long time and floating oil may appear on the surface, which will adhere to the surface of the workpiece when it is taken out. In general, unused ingredients such as degreasers and emulsifiers may appear on the surface of the solution.

[0004] The prior art often uses a steel belt skimmer or a floating suction device to directly remove the floating oil on the surface of the liquid medicine, but this may cause the components used to remove grease, such as the precipitated active agent, to also be removed.

[0005] In addition, when demulsifying the wastewater after oil removal, the unemulsified dispersed oil in the wastewater will compete with the emulsified oil for the demulsifier, resulting in the need to use more demulsifier when treating more saturated wastewater. Summary of the invention

[0006] The object of the present invention is to provide an electroplating workpiece degreasing device, which can improve the removal efficiency of the surface substances of the degreasing tank solution and does not waste the precipitated degreasing agent.

[0007] The present invention provides an electroplating workpiece degreasing device, comprising a degreasing tank for storing liquid and performing degreasing treatment on the electroplating workpiece;

[0008] The liquid level separation device is located in the degreasing tank, and divides the liquid level in the degreasing tank into a degreasing area and an oil collecting area, and prevents the liquid levels in the degreasing area and the oil collecting area from communicating with each other;

[0009] and a floating oil remover, which is located in the oil removal area in the oil removal tank, floats on the liquid surface of the oil removal area, collects floating oil in the oil removal area, and transports the floating oil to the oil collection area through a first hose.

[0010] Furthermore, the liquid level separation device also includes a delivery pipeline, and both ends of the delivery pipeline are respectively located below the liquid levels of the oil removal area and the oil collection area.

[0011] Furthermore, a first hose connects the floating oil remover and the delivery pipeline, and the floating oil collected by the floating oil remover is delivered to the delivery pipeline through the first hose, and then the floating oil is delivered to the oil collection area through the delivery pipeline.

[0012] Furthermore, the portion of the liquid level separation device located below the liquid level is provided with a gate connecting the oil removal area and the oil collection area, and a gate is provided on the gate, and the separation of the oil removal area and the oil collection area is controlled by the gate.

[0013] Furthermore, the gate is divided into a blocking portion and a connecting portion. When the gate moves downward, the blocking portion gradually overlaps with the gate opening, thereby completely separating the oil removal area and the oil collection area.

[0014] Furthermore, a sealing protrusion is provided on the gate;

[0015] When the gate stops moving, the sealing protrusion forms a seal with the gate;

[0016] The gate is operated by a pneumatic cylinder.

[0017] Furthermore, when the electroplating drum is immersed in the degreasing area, the sealing part and the gate are in an overlapping state, and the floating degreasing device causes the pressure at the outlet of the conveying pipeline to change as the liquid level rises, thereby sending the floating oil and the degreasing solution into the oil collecting area.

[0018] Furthermore, after the oil removal is completed, the cylinder drives the gate to move upward to release the separation between the oil removal area and the oil collection area.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows:

[0020] (1) Only the liquid surface in the degreasing area of the workpiece is processed to reduce the area of the degreasing liquid surface, improve the accuracy of removing floating oil, and improve the degreasing efficiency;

[0021] (2) The components removed from the degreasing area are still present in the degreasing tank, and the active agent removed by the floating degreasing device can still be reused;

[0022] (3) Collect the unemulsified floating oil first, then demulsify the waste liquid containing emulsified oil to reduce the use of demulsifier and flocculant;

[0023] (4) Continuously accumulate the floating oil in the degreasing tank to increase the thickness of the unemulsified grease layer, making it easier to collect the unemulsified grease;

[0024] (5) Taking advantage of the fact that the density of oil is lower than that of water, a bracket that floats with the floating oil remover is provided to support the second hose at a position higher than the floating oil remover, thereby realizing a floating oil collection method that is adaptive to the liquid level height; BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the oil removal device of the present invention;

[0026] Figure 2 It is a schematic diagram of the partition structure of the present invention;

[0027] Figure 3Schematic diagram of the oil removal state of the present invention;

[0028] Figure 4 Liquid level state diagram of the oil removal tank of the present invention;

[0029] Figure 5 Schematic diagram of the wastewater treatment structure of the present invention;

[0030] Figure 6 Schematic diagram of the floating oil suction structure of the present invention;

[0031] Among them, 1. Oil removal tank; 2. Liquid surface separation device; 201. Delivery pipeline; 202. First hose; 203. Gate; 204. Gate valve; 205. Blocking part; 206. Connecting part; 207. Sealing protrusion; 208. Cylinder; 3. Floating oil remover; 4. Lifting device; 5. Gantry; 6. Electroplating drum; 7. Air flotation unit; 8. Square frame; 9. Second hose; 10. Bracket.

[0032] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 the present invention 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 cannot be understood as a limitation to the present invention.

[0035] Embodiment 1

[0036] As Figures 1 to 4 shown, an oil removal device for electroplated workpieces used in the present invention includes an oil removal tank 1, a liquid surface separation device 2, and a floating oil remover 3.

[0037] The liquid surface separation device 2 is located inside the oil removal tank 1. The liquid surface separation device 2 divides the liquid surface in the oil removal tank 1 into an oil removal area and an oil collection area, so that the liquid surfaces in the oil removal area and the oil collection area do not communicate with each other, and the floating oil in the oil collection area cannot diffuse to the oil removal area through the liquid surface.

[0038] The floating oil separator 3 is located in the oil removal area within the oil removal tank 1. The floating oil separator 3 floats on the liquid surface of the oil removal area and collects the floating oil in the oil removal area.

[0039] The liquid level separating device 2 is also provided with a conveying pipeline 201. The conveying pipeline 201 is located below the liquid level near the bottom of the oil removal tank 1. One end of the conveying pipeline 201 is located below the oil removal area, and the other end of the conveying pipeline 201 is located below the oil collection area. Through the conveying pipeline 201, the liquid in the oil removal area can be conveyed to the oil collection area.

[0040] The conveying pipeline 201 and the floating oil separator 3 are connected through a first hose 202. After the floating oil separator 3 collects the floating oil in the oil removal area, it is transported to the conveying pipeline 201 through the first hose 202, and then the floating oil is sent from the oil removal area to the oil collection area through the conveying pipeline 201.

[0041] After the floating oil enters the oil collection area, it first enters below the liquid level of the oil collection area. Because the specific gravity of the floating oil is smaller than that of water, the floating oil will float upward from below the liquid level and gather on the surface of the oil collection area.

[0042] When the floating oil separator 3 separates the floating oil, it will not only collect the floating oil, but also collect the precipitated surfactant / emulsifier and part of the liquid containing surfactant / emulsifier. By sending it below the liquid level through the conveying pipeline 201, this part of the precipitated surfactant / emulsifier and part of the liquid containing surfactant / emulsifier and the liquid medicine can be remixed.

[0043] The part of the liquid level separating device 2 located below the liquid level is also provided with a sluice 203 connecting the oil removal area and the oil collection area, and a gate 204 is also provided.

[0044] Such as Figure 3 、 4 As shown, the gate 204 is divided into two parts, namely a blocking part 205 and a connecting part 206. When the gate 204 moves downward, the blocking part 205 gradually coincides with the sluice 203. At this time, the water areas of the oil removal area and the oil collection area are completely separated.

[0045] After the oil removal area and the oil collection area are separated, in the absence of external interference, because the pressure on both sides at the outlet of the conveying pipeline 201, that is, the end located in the oil collection area, is the same, the liquid collected in the floating oil separator 3 is always stored in the first hose 202;

[0046] Such as Figure 1 and Figure 3As shown, the lifting device 4 supports the electroplating drum 6 and travels along the gantry 5 to above the degreasing tank 1. At this time, the blocking part 205 and the gate opening 203 are in a coincident state. The lifting device 4 descends, and the electroplating drum 6 is sent and rolled into the degreasing tank 1. After the electroplating drum 6 is immersed in the degreasing area, the liquid level in the degreasing area rises. The floating oil remover 3 rises with the liquid level, driving the liquid level in the first hose 202 to rise, resulting in the pressure balance at the outlet of the conveying pipeline 201 being broken, and the liquid in the first hose 202 starts to enter the oil collecting area.

[0047] At the same time, part of the oil stains on the surface of the workpiece float to the liquid level in the degreasing area, forming floating oil. The floating oil and part of the degreasing liquid medicine are collected by the floating oil remover 3, sent into the oil collecting area through the first hose 202, and after entering the oil collecting area, the degreasing liquid medicine is mixed with the liquid medicine in the oil collecting area again, while the floating oil floats above the liquid level in the oil collecting area.

[0048] There are also two sealing protrusions 207 on the blocking part 205. When the gate 204 moves downward, the lower sealing protrusion 207 and the lower part of the gate opening 203 form a seal. When the gate 204 moves upward, the upper sealing protrusion 207 and the upper part of the gate opening 203 form a seal.

[0049] When the degreasing of the workpiece is completed, the air cylinder 208 retracts, the gate 204 moves upward, and the connecting part 206 gradually coincides with the gate opening 203. The lower parts of the liquid levels in the degreasing area and the oil collecting area are connected again, and the pressures in the degreasing area and the oil collecting area are synchronized again. The floating oil remover 3 stops collecting floating oil, and the drum 6 is lifted by the lifting device 4 again, and the liquid levels in the degreasing area and the oil collecting area drop synchronously.

[0050] Embodiment 2

[0051] As Figure 5 shown, the present invention also provides a treatment process for electroplating oily wastewater, including the following steps:

[0052] Step 1, use the degreasing tank in Embodiment 1 to store the floating oil in the oil collecting area and continuously increase the floating oil content on the liquid level in the oil collecting area. At the same time, perform air flotation on the degreasing liquid medicine in the oil collecting area through the air flotation unit 7 to reduce the dispersed oil droplets not emulsified in the liquid medicine. Preferably, the above steps are carried out when the degreasing liquid medicine is used.

[0053] Step 2, pump out the floating oil not emulsified in the oil collecting area. Similarly, this step can also be carried out when the degreasing liquid medicine is used.

[0054] The floating oil remover 3 can continuously transport the floating oil to the oil collection area during oil removal. When the connecting part 206 overlaps with the gate 203, the oil collection area contains emulsified oil, oil removal solution and floating oil, while the oil removal area contains only emulsified oil and oil removal solution. The density of emulsified oil and oil removal solution is similar to that of water, while the density of floating oil is lower than that of water. This means that when the oil collection area and the oil removal area are connected, the liquid level in the oil collection area is higher than that in the oil removal area because the upper layer is floating oil.

[0055] Preferably, Figure 6 As shown, two floating oil removers 3 are connected by a square frame 8, and a bracket 10 for supporting a second hose 9 is provided on the square frame 8. The bracket 10 moves with the floating oil remover 3, and the second hose 9 on the bracket 10 also moves up and down with the floating oil remover 3. The relative height of the liquid inlet of the second hose 9 is greater than the relative height of the liquid inlet of the floating oil remover 3.

[0056] Step 3, extracting the wastewater containing the emulsified oil in the de-oiling tank to break the emulsion. It should be noted that before extracting the liquid containing the emulsified oil in the de-oiling tank, the air flotation unit 7 is used to reduce the dispersed oil droplets in the wastewater that are not emulsified as much as possible;

[0057] Step 4: adding a pH regulator to the wastewater after demulsification to lower the pH value of the wastewater. The pH regulator is 10% sulfuric acid, which is used to neutralize the alkaline substances in the wastewater. The pH value of the wastewater is between 6 and 8.

[0058] Step 5, adding a flocculant and stirring, and obtaining a treated liquid after separation;

[0059] Step six, using ultrafiltration membrane / reverse osmosis membrane to filter the treated liquid to obtain qualified water. The wastewater after preliminary treatment such as flocculation, sedimentation or flotation is filtered through ultrafiltration membrane or reverse osmosis membrane.

[0060] Ultrafiltration membranes have larger pore sizes and can remove suspended particles, some dissolved matter, and organic matter in water, so that wastewater can meet discharge standards;

[0061] The reverse osmosis membrane has a smaller pore size and needs to be pressurized to allow the treated liquid to pass through. The resulting qualified water can be recycled;

[0062] In addition, the ultrafiltration membrane and the reverse osmosis membrane can also be combined so that the treated liquid first passes through the ultrafiltration membrane and then passes through the reverse osmosis membrane to obtain qualified water, thereby increasing the service life of the reverse osmosis membrane.

[0063] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0065] The present invention and its implementation manners have been described above. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. An oil removal device for electroplated workpieces, characterized in that, include: A degreasing tank (1), used for storing liquid and degreasing the electroplated workpiece; The liquid level separation device (2) is located in the oil removal tank (1) and divides the liquid level in the oil removal tank (1) into an oil removal area and an oil collection area, and prevents the liquid levels in the oil removal area and the oil collection area from communicating with each other; and a floating oil remover (3), located in the oil removal area in the oil removal tank (1), floating on the liquid surface of the oil removal area, collecting floating oil in the oil removal area, and transporting the floating oil to the oil collection area through a first hose (202); The liquid level separation device (2) further comprises a delivery pipeline (201), wherein two ends of the delivery pipeline (201) are respectively located below the liquid levels of the oil removal area and the oil collection area; The first hose (202) connects the floating oil remover (3) and the delivery pipeline (201); the floating oil collected by the floating oil remover (3) is delivered to the delivery pipeline (201) through the first hose (202); and the floating oil is then delivered to the oil collection area through the delivery pipeline (201); The portion of the liquid level separation device (2) located below the liquid level is provided with a gate (203) connecting the oil removal area and the oil collection area, and a gate (204) is provided on the gate (203). The gate (204) controls the separation of the oil removal area and the oil collection area.

2. The degreasing equipment for electroplated workpieces according to claim 1, characterized in that, The gate (204) is divided into a blocking portion (205) and a connecting portion (206). When the gate (204) moves downward, the blocking portion (205) gradually overlaps with the gate (203), thereby completely separating the oil removal area and the oil collection area.

3. An oil removal device for electroplated workpieces according to claim 1, characterized in that, A sealing protrusion (207) is provided on the gate (204); When the gate (204) stops moving, the sealing protrusion (207) forms a seal with the gate (203); The gate (204) is operated by a cylinder (208).

4. An oil removal device for electroplated workpieces according to claim 1, characterized in that, When the electroplating drum (6) is immersed in the degreasing area, the sealing portion (205) and the gate (203) are in an overlapping state, and as the liquid level of the floating degreasing device (3) rises, the pressure at the outlet of the conveying pipeline (201) changes, thereby sending the floating oil and the degreasing solution into the oil collection area.

5. The degreasing device for electroplated workpieces according to claim 1, characterized in that, After the oil removal is completed, the cylinder (208) drives the gate (204) to move upward, thereby removing the separation between the oil removal area and the oil collection area.

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