Filtering and deslagging device for pickling and phosphating tank liquid

Abstract

The utility model relates to a pickling and phosphating tank liquid filtering and deslagging device which comprises a box body, a filtering plate, an input pipe, a return pipe and a deslagging pipe, and the interior of the box body is divided into a separation chamber and a buffer chamber through an annular partition plate; the separation chamber is vertically divided into a supernatant chamber and a settling chamber by the filter plate; an overflow port is formed in the side wall of the supernatant chamber and is connected with a return pipe, so that the phosphating solution in the supernatant chamber flows back to the phosphating tank through the return pipe; a slag discharging opening is formed in the bottom of the settling chamber, an input opening is formed in the top of the buffer chamber, and the input opening is connected with an input pipe for extracting a phosphating solution from the phosphating tank. According to the device, a filtering method and a precipitation method are combined, online circulation of a phosphating solution can be realized, shutdown treatment is not needed, filtered phosphating residues cannot be accumulated on the upper surface of the filter plate, the cleaning period of the filter plate can be effectively prolonged, the input phosphating solution enters the buffer chamber firstly and then enters the precipitation chamber, and therefore the phosphating solution can be recycled. The settling effect of the settling chamber is ensured.

Description

Technical Field

[0001] This utility model relates to the field of steel surface phosphating treatment technology, specifically to a filtration and slag removal device for pickling and phosphating tank solution. Background Technology

[0002] Pickling and phosphating tanks are commonly used equipment in electroplating and coating processes, primarily for surface pretreatment of metals such as steel and aluminum alloys to form a dense phosphating film. With prolonged use, phosphating slag gradually forms in the phosphating solution. This slag covers the metal surface, forming an uneven film, resulting in a loose or uneven phosphating film and affecting the process outcome. The presence of phosphating slag reduces the frequency of tank replacement, increasing process costs. Therefore, removing phosphating slag not only ensures a uniform and dense phosphating film on the metal surface, improving coating adhesion and corrosion resistance, but also extends the service life of the tank solution.

[0003] Existing technologies typically employ filtration and sedimentation methods to remove slag from phosphating solutions. Filtration uses filter plates to isolate the phosphating slag, but the filtration efficiency gradually decreases as slag accumulates on the filter plates, requiring frequent cleaning. Sedimentation involves diverting the phosphating solution to an external settling tank for sedimentation, separating the phosphating slag by gravity. However, sedimentation has a long cycle and requires all the phosphating solution to be withdrawn from the phosphating tank, often necessitating a shutdown for treatment.

[0004] Therefore, it is necessary to study a filtration and slag removal device for pickling and phosphating tank solutions. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a filtration and slag removal device for pickling and phosphating tank solutions, which can effectively solve the problems of existing filtration methods requiring frequent cleaning of filter plates, and sedimentation methods having long cycles and requiring shutdown for maintenance.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A filtration and slag removal device for pickling and phosphating bath solution includes a housing, a filter plate, an inlet pipe, a return pipe, and a slag discharge pipe.

[0008] The box is fixed with an annular partition to divide the interior of the box into a separation chamber in the middle and a buffer chamber surrounding the separation chamber.

[0009] The filter plate is horizontally arranged in the middle of the separation chamber, dividing the separation chamber into a supernatant chamber and a sedimentation chamber.

[0010] The side wall of the supernatant chamber is provided with an overflow port, which is connected to a return pipe so that the phosphating solution in the supernatant chamber can be returned to the phosphating tank through the return pipe.

[0011] The bottom of the sedimentation chamber is provided with a residue discharge port, the residue discharge port is connected with a residue discharge pipe and provided with a residue discharge valve;

[0012] The top of the buffer chamber is provided with an input port, the input port is connected with an input pipe for pumping phosphating solution from the phosphating tank, a pump body is arranged on the input pipe, and the height of the input port is higher than that of the overflow port;

[0013] The bottom of the annular partition plate is provided with a communication port in a spaced manner, which communicates the buffer chamber and the sedimentation chamber.

[0014] Further, the middle part of the inner wall of the separation chamber is provided with a bracket in a spaced manner, and a cover body is detachably mounted on the top of the separation chamber;

[0015] The edge of the filter plate is arranged on the bracket, and a supporting rod is connected between the filter plate and the cover body.

[0016] Further, a threaded sleeve is detachably mounted on the upper surface of the cover body, the upper end of the supporting rod is threadedly connected with the threaded sleeve, and the lower end of the supporting rod is rotationally connected with the filter plate.

[0017] Further, two limiting members are fixedly sleeved on the lower end of the supporting rod in an up-down spaced manner, and the two limiting members are located on the upper side and the lower side of the filter plate respectively.

[0018] Further, the reflux pipe horizontally passes through the buffer chamber and is connected downward to the phosphating tank.

[0019] Further, the bottom of the inner wall of the box body is conical in shape, the residue discharge port is arranged at the center of the conical shape.

[0020] Further, a pressure sensor is arranged on the bottom of the inner wall of the box body, and the pressure sensor, the pump body and the residue discharge valve are all in control connection with the controller.

[0021] Further, a liquid level sensor is arranged on the inner wall of the buffer chamber and in control connection with the controller.

[0022] The beneficial effects of the above technical scheme are:

[0023] (1) The box body is divided into a separation chamber located in the middle and a buffer chamber surrounding the separation chamber by an annular partition plate, and the separation chamber is divided into an upper clear chamber and a sedimentation chamber by a filter plate, the bottom of the annular partition plate is provided with a communication port in a spaced manner, which communicates the buffer chamber and the sedimentation chamber, so that the phosphating solution pumped from the input pipe first enters the buffer chamber, then the relatively stable phosphating solution at the bottom of the buffer chamber enters the sedimentation chamber through the communication port, the disturbance caused by the input of the phosphating solution to the sedimentation chamber can be reduced, and the sedimentation effect of the sedimentation chamber can be ensured.

[0024] (2) The phosphating liquid is first input into the buffer chamber, and then enters the sedimentation chamber through the communication port, the phosphating liquid enters the supernatant from the lower to the upper through the filter screen, the filter plate filters the phosphating liquid from the lower to the upper, can block the phosphating slag, and the phosphating slag is blocked in the sedimentation chamber, so that the phosphating liquid in the supernatant chamber is filtered and the slag is removed, and the phosphating liquid in the supernatant is returned to the phosphating tank through the overflow port and the reflux pipe, and the filtering cycle is completed.

[0025] In summary, the utility model discloses the filter method and the sedimentation method are combined, relative to the traditional filter method, the phosphating slag of being filtered will not be accumulated on the upper surface of the filter plate, can effectively prolong the cleaning period of filter plate, relative to the sedimentation method, the phosphating liquid of the utility model can circulate on line, does not need to be all introduced from the phosphating tank, does not need to stop handling, effectively solve the problem that the existing filter method needs frequently cleaning filter plate, and the sedimentation method is long and needs to stop handling, effectively improve the efficiency and flexibility of separating the phosphating slag in the phosphating liquid. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a cross-sectional schematic view of the utility model;

[0027] Figure 2 It is Figure 1 It is a local enlarged view of A in the middle;

[0028] Figure 3 It is Figure 1 It is a local enlarged view of B in the middle.

[0029] Fig. 1 is a box body, 2 is a filter plate, 3 is an input pipe, 4 is a reflux pipe, 5 is a residue discharge pipe, 6 is an annular partition, 7 is a separation chamber, 8 is a buffer chamber, 9 is a supernatant chamber, 10 is a sedimentation chamber, 11 is a residue discharge valve, 12 is a pump body, 13 is a bracket, 14 is a cover body, 15 is a supporting rod, 16 is a threaded sleeve, 17 is a limiting piece, 18 is a pressure sensor, 19 is a liquid level sensor, 101 is an overflow port, 102 is a residue discharge port, 103 is an input port, and 104 is a communication port. DETAILED DESCRIPTION

[0030] The utility model will be described in further detail in combination with the drawings and specific implementation:

[0031] The embodiment aims to provide a pickling phosphating tank liquid filtering and slag removing device, which is mainly used for filtering and removing phosphating slag in a pickling phosphating tank liquid in a metal pickling phosphating process, and solves the problems that the existing filter method needs to frequently clean the filter plate 2, and the sedimentation method is long and needs to stop handling.

[0032] A pickling phosphating tank liquid filtering and slag removing device, such as Figure 1, including the box 1, filter plate 2, input pipe 3, backflow pipe 4 and slag discharge pipe 5. Box 1 is cylindrical structure, bottom provided with a leg, inside has inner cavity. The bottom of the inner cavity is welded with annular partition 6, to divide the box 1 inside into the middle separation chamber 7 and buffer chamber 8 around the side of the separation chamber 7.

[0033] Filter plate 2 is horizontally arranged in the middle of the separation chamber 7, which divides the separation chamber 7 into supernatant chamber 9 and sedimentation chamber 10. The filter plate 2 filters the phosphating liquid from bottom to top, which can block the phosphating slag and make the phosphating slag blocked in the sedimentation chamber 10, so that the phosphating liquid in the supernatant chamber 9 is filtered and the slag is removed. The specific structure and working principle of the filter plate 2 are all adopted in the prior art, which will not be described here.

[0034] The side wall of the supernatant chamber 9 is provided with overflow port 101, and the overflow port 101 is connected with backflow pipe 4, so as to realize the backflow of the phosphating liquid in the supernatant chamber 9 to the phosphating tank through the backflow pipe 4. Specifically, the backflow pipe 4 horizontally passes through the buffer chamber 8 and is connected downward to the phosphating tank. When the liquid level rises to the overflow port 101, the phosphating liquid will flow out from the overflow port 101 and overflow downward to the phosphating tank through the backflow pipe 4, forming a cycle.

[0035] The bottom of the sedimentation chamber 10 is provided with slag discharge port 102, which is connected with slag discharge pipe 5 and provided with slag discharge valve 11. The slag discharge valve 11 is opened regularly to discharge the phosphating slag deposited at the bottom of the box 1. The slag discharge pipe 5 is connected to the next stage of phosphating slag treatment equipment for further separation and purification of the phosphating slag.

[0036] The top of the buffer chamber 8 is provided with input port 103, which is connected with input pipe 3 for pumping phosphating liquid from the phosphating tank. The input pipe 3 is provided with pump body 12 for providing power to the input pipe 3. The height of the input port 103 is higher than that of the overflow port 101, so as to avoid the overflow of the phosphating liquid from the input port 103.

[0037] The bottom of the annular partition 6 is provided with communication port 104 for communication between the buffer chamber and the sedimentation chamber 10, so that the phosphating liquid pumped from the input pipe 3 first enters the buffer chamber 8, and then the relatively stable phosphating liquid at the bottom of the buffer chamber 8 enters the sedimentation chamber 10 through the communication port 104, which can reduce the disturbance to the sedimentation chamber 10 when the phosphating liquid is input, and ensure the sedimentation effect of the sedimentation chamber 10.

[0038] In this embodiment, in order to facilitate the disassembly and maintenance of the filter plate 2, such as Figure 1A bracket 13 is provided at intervals in the middle of the inner wall of the separation chamber 7 to support the filter plate 2. A cover 14 is detachably installed on the top of the separation chamber 7. The edge of the filter plate 2 rests on the bracket 13, avoiding the use of connectors for connection. A support rod 15 connects the filter plate 2 and the cover 14. The support rod 15 allows the upper part of the filter plate 2 to be limited, preventing it from shifting due to water flow disturbance. When it is necessary to remove the filter plate 2, the cover 14 can be removed from bottom to top, and then the filter plate 2 can be taken out through the support rod 15.

[0039] Furthermore, such as Figure 2 A threaded sleeve 16 is detachably mounted on the upper surface of the cover 14. The upper end of the support rod 15 is threadedly connected to the threaded sleeve 16, and the lower end of the support rod 15 is rotatably connected to the filter plate 2. Specifically, as shown... Figure 3 Two limiting members 17 are fixedly fitted at the lower end of the support rod 15 at an interval. The two limiting members 17 are located on the upper and lower sides of the filter plate 2, respectively, to limit the vertical displacement between the support rod 15 and the filter plate 2. The distance between the two limiting members 17 is greater than the thickness of the filter plate 2 to prevent the support rod 15 from being unable to rotate relative to the filter plate 2 due to the clamping force generated by the two limiting members 17. By rotating the support rod 15, the support rod 15 can move up and down, and the filter plate 2 will move up and down accordingly. When the filter plate 2 moves downward, it will gradually approach the bracket 13 and form prestress to prevent the filter plate 2 from shifting during use.

[0040] Furthermore, the bottom of the inner wall of the box 1 is a cone shape with a larger top and a smaller bottom, and the slag discharge port 102 is located in the center of the cone shape, so that the phosphating slag deposited at the bottom of the buffer chamber 8 can gradually enter the sedimentation chamber 10 through the connecting port 104, and the phosphating slag in the sedimentation chamber 10 can be effectively discharged through the slag discharge port 102.

[0041] Further, the bottom of the inner wall of the box 1 is provided with a pressure sensor 18 for detecting the weight of the phosphating slag accumulated at the bottom of the box 1. The pressure sensor 18, the pump body 12 and the slag discharge valve 11 are all connected to the controller. A liquid level sensor 19 is arranged on the inner wall of the buffer chamber 8 for detecting the liquid level in the box 1, and the liquid level sensor 19 is connected to the controller. The controller is a single-chip microcomputer and is arranged outside the box 1. The controller obtains the accumulated amount of phosphating slag in real time through the pressure sensor 18, and when the accumulated amount of phosphating slag reaches a threshold value, the controller opens the slag discharge valve 11, and the liquid level in the box 1 decreases. When the liquid level sensor 19 feeds back that the liquid level has decreased to a lower expected value, the slag discharge valve 11 is closed. Then the input pipe 3 continuously inputs phosphating liquid until the liquid level reaches the overflow port 101 again and performs reflux circulation until the phosphating slag is accumulated again to the threshold value. In other embodiments, an empirical value of a slag discharge valve 11 opening and closing cycle can also be obtained and set through experiments, so that the slag discharge valve 11 is opened and closed according to a fixed rule to achieve periodic slag discharge, so that the pressure sensor 18 does not need to be arranged.

Claims

1. A filtration and slag removal device for pickling and phosphating tank solutions, characterized in that: The box, the filter plate, the input pipe, the backflow pipe and the residue discharge pipe, The annular partition plate is fixed in the box to divide the box into the separation chamber in the middle and the buffer chamber around the separation chamber; The filter plate is horizontally arranged in the middle of the separation chamber to divide the separation chamber into the supernatant chamber and the sedimentation chamber; The side wall of the supernatant chamber is provided with the overflow port, and the overflow port is connected with the backflow pipe to realize the backflow of the phosphating liquid in the supernatant chamber to the phosphating tank through the backflow pipe; The bottom of the sedimentation chamber is provided with the residue discharge port connected with the residue discharge pipe and provided with the residue discharge valve; The top of the buffer chamber is provided with the input port connected with the input pipe for extracting the phosphating liquid from the phosphating tank, and the pump body is arranged on the input pipe, and the height of the input port is higher than that of the overflow port; The bottom of the annular partition plate is provided with the communication port for communicating the buffer chamber and the sedimentation chamber.

2. The slag removing device for pickling and phosphating tank solution according to claim 1, characterized in that: The middle of the inner wall of the separation chamber is provided with the bracket, and the top of the separation chamber is detachably provided with the cover body; The edge of the filter plate is arranged on the bracket, and the filter plate is connected with the support rod between the cover body.

3. The device for filtering and removing slag from the pickling and phosphating tank solution according to claim 2, characterized in that: The upper surface of the cover body is detachably provided with the threaded sleeve, the upper end of the support rod is threadedly connected with the threaded sleeve, and the lower end of the support rod is rotationally connected with the filter plate.

4. The device for filtering and removing slag from a pickling and phosphating tank solution according to claim 3, characterized in that: The lower end of the support rod is fixedly sleeved with two limiting members upward and downward, and the two limiting members are respectively located on the upper side and the lower side of the filter plate.

5. The device for filtering and slagging of pickling and phosphating tank solutions according to any of claims 1 - 4, characterized in that: The backflow pipe horizontally passes through the buffer chamber and downwardly communicates with the phosphating tank.

6. The slag filtering device for pickling and phosphating tank solution according to any one of claims 1-4, characterized in that: The bottom of the inner wall of the box is conical from large to small, and the residue discharge port is arranged at the center of the conical shape.

7. The device for filtering and slagging of pickling and phosphating tank solutions according to any of claims 1 - 4, characterized in that: The bottom of the inner wall of the box is provided with the pressure sensor, and the pressure sensor, the pump body and the residue discharge valve are connected with the controller.

8. The device according to claim 7, characterized in that: The liquid level sensor is arranged on the inner wall of the buffer chamber and connected with the controller.

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