Automatic skimming device for clarifying basin

Abstract

This utility model relates to the field of defoaming technology in clarifiers, specifically an automatic defoaming device for clarifiers. It includes an overflow annular groove, a foam annular groove, and a skimming mechanism. The overflow annular groove and the foam annular groove are fixedly arranged outside the clarifier from the inside out. An annular wire mesh demister is installed inside the overflow annular groove, with the top of the clarifier, the top of the annular wire mesh demister, and the top of the foam annular groove flush. The skimming mechanism includes a support frame, a scraper arm, and multiple scrapers. The support frame is fixedly arranged outside the foam annular groove. The scraper arm is rotatably mounted on the support frame and positioned above the clarifier. Multiple scrapers are evenly inclined and arranged on the scraper arm, with the lower part of each scraper located at the top of the clarifier, the top of the annular wire mesh demister, and the top of the foam annular groove. This automatic defoaming device for clarifiers replaces manual defoaming. The scrapers and the annular wire mesh demister work together to efficiently remove foam from the surface of the liquid in the clarifier.

Description

Technical Field

[0001] This utility model relates to the field of defoaming technology in clarifiers, specifically to an automatic defoaming device for clarifiers. Background Technology

[0002] In the zinc smelting purification and cooling process, the purified zinc sulfate solution enters the clarification tank via a cooling tower. After clarification in the clarification tank, it is sent to the electrolysis process. During production, a large amount of foam accumulates on the surface of the clarification tank. This foam contains a large amount of impurities such as organic matter, calcium, and magnesium. The clarification tanks used in production are generally 11 meters in diameter, making manual foam removal impossible. This results in large clumps of foam being sent to electrolysis along with the new solution, causing problems such as plate burning during electrolysis and resulting in significant economic losses. Furthermore, the foam reduces the heat dissipation performance of the clarification tank, leading to high temperatures in the new solution sent to electrolysis and poor electrolysis stability. Therefore, an automatic defoaming device for the clarification tank is urgently needed to solve these problems. Utility Model Content

[0003] To address the technical problems of large amounts of foam accumulating on the surface of the clarification tank, which cannot be cleaned manually and results in large clumps of foam being sent to electrolysis along with the new liquid, and the reduced heat dissipation performance of the clarification tank due to foam, this utility model provides an automatic defoaming device for the clarification tank. This device replaces manual defoaming, and the scraper and annular wire mesh demister work together to efficiently remove foam from the surface of the liquid in the clarification tank, effectively preventing foam from flowing into the electrolysis process and improving the heat dissipation performance of the clarification tank.

[0004] This utility model provides an automatic defoaming device for a clarifier, including an overflow annular groove, a foam annular groove, and a foam scraping mechanism. The overflow annular groove and the foam annular groove are fixedly arranged outside the clarifier from the inside to the outside. An annular wire mesh demister is arranged inside the overflow annular groove. The top of the clarifier, the top of the annular wire mesh demister, and the top of the foam annular groove are flush. The foam scraping mechanism includes a lifting frame, a scraper arm, and multiple scrapers. The lifting frame is fixedly arranged outside the foam annular groove. The scraper arm is rotatably arranged on the lifting frame and located above the clarifier. The multiple scrapers are evenly inclined and arranged on the scraper arm. The lower part of each scraper is located at the top of the clarifier, the top of the annular wire mesh demister, and the top of the foam annular groove.

[0005] Furthermore, the scraper arm includes a rotating shaft and multiple support arms fixedly connected to the rotating shaft. A bearing seat is fixedly installed at the center of the erecting frame. The rotating shaft passes through a bearing in the bearing seat and is rotatably connected to the bearing. A motor is fixedly installed on the erecting frame. The output shaft of the motor is fixedly connected to the top of the rotating shaft and can drive it to rotate. The multiple support arms are arranged in a ring, and the multiple scrapers are respectively inclinedly installed on the multiple support arms. The erecting frame supports the motor, scraper arm, and multiple scrapers. Each support arm supports and fixes one scraper. When the motor starts, it drives the rotating shaft to rotate. The rotating shaft rotates relative to the bearing, thereby driving the multiple support arms and scrapers to rotate.

[0006] Furthermore, an annular guide rail is fixedly installed on the erecting frame, located above multiple support arms. The annular guide rail has an annular guide groove and an opening communicating with the groove. Multiple sliders are installed within the annular guide groove, and each slider is fixedly equipped with a synchronizing rod. Each synchronizing rod passes through the opening and is fixedly connected to a support arm. When the support arm rotates, it drives the synchronizing rod to rotate, which in turn causes the slider to slide within the annular guide groove. The synchronizing rod, sliders, and annular guide groove further support the support arms, improving the stability of the rotation of the multiple support arms and scraper.

[0007] Furthermore, it also includes a cleaning mechanism, which comprises a circular spray frame and multiple nozzles. The circular spray frame is fixedly mounted on the support frame, and its outer diameter is the same as that of the foam ring groove. The circular spray frame is located above multiple support arms, and a through hole is provided at the center of the circular spray frame. The top of the rotating shaft passes through the through hole and is fixedly connected to the output shaft of the motor. The multiple nozzles are evenly fixedly mounted on the circular spray frame, and their outlets face the clarification tank, the annular wire mesh demister, and the foam ring groove, respectively. The through hole, the center of the support frame, and the center of the clarification tank are all aligned in a straight line.

[0008] Furthermore, each of the scrapers has a downwardly extending, inclined scraper strip located inside the clarification tank at a position corresponding to the scraper blade. When the scraper blade rotates, it drives the scraper strip to rotate, and the scraper strip extends into the liquid. The scraper blade and scraper strip work together to push the (small amount) of liquid and the foam on the liquid surface toward the overflow annular groove.

[0009] Furthermore, a fixing part is provided inside the overflow annular groove. The fixing part includes two fixing frames symmetrically arranged inside the overflow annular groove, and the annular wire mesh demister is placed between the two fixing frames. When the annular wire mesh demister is placed between the two fixing frames, the annular wire mesh demister is fixed inside the overflow annular groove.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention relates to an automatic defoaming device for clarifiers. When the motor starts, it drives the scraper arm and multiple scrapers to rotate. The scrapers, positioned corresponding to the top of the clarifier, come into contact with a (small amount) of liquid and foam on the liquid surface. Because the scrapers are tilted, they push the (small amount) of liquid and foam towards the overflow annular groove as they rotate. The foam first contacts the annular wire mesh demister. The liquid, due to gravity, passes through the mesh of the annular wire mesh demister and falls into the overflow annular groove, while the foam is blocked by the annular wire mesh demister. The foam continues to be pushed by the scrapers towards the foam annular groove, ultimately achieving the purpose of defoaming. This automatic defoaming device replaces manual defoaming. The combined use of the scrapers and the annular wire mesh demister efficiently removes foam from the liquid surface in the clarifier, effectively preventing foam from flowing into the electrolysis process and improving the heat dissipation performance of the clarifier. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural schematic diagram of an automatic defoaming device for a clarifier according to the present invention;

[0013] Figure 2 This is a top view schematic diagram of the scraper arm and scraper blade of this utility model;

[0014] Figure 3 This is a top view schematic diagram of the annular guide rail of this utility model;

[0015] Figure 4 This is a schematic diagram of the cleaning mechanism of this utility model;

[0016] The numbers in the attached diagram are:

[0017] 1. Clarifying tank; 2. Overflow ring groove; 21. Fixing frame; 3. Foam ring groove; 4. Annular wire mesh demister; 5. Lifting frame; 51. Annular guide rail; 52. Slider; 53. Synchronizing rod; 6. Scraper arm; 61. Rotating shaft; 62. Support arm; 7. Scraper blade; 71. Scraper strip; 8. Motor; 9. Circular spray frame; 91. Spray head. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-4As shown, an automatic defoaming device for a clarifier includes an overflow annular groove 2, a foam annular groove 3, and a skimming mechanism. The overflow annular groove 2 and the foam annular groove 3 are fixedly arranged outside the clarifier 1 from the inside to the outside. An annular wire mesh demister 4 is arranged inside the overflow annular groove 2. The top of the clarifier 1, the top of the annular wire mesh demister 4, and the top of the foam annular groove 3 are flush. The skimming mechanism includes a lifting frame 5, a scraper arm 6, and multiple scrapers 7. The lifting frame 5 is fixedly arranged outside the foam annular groove 3. The scraper arm 6 is rotatably arranged on the lifting frame 5 and located above the clarifier 1. The multiple scrapers 7 are evenly inclined and arranged on the scraper arm 6. The lower part of each scraper 7 is located at the top of the clarifier 1, the top of the annular wire mesh demister 4, and the top of the foam annular groove 3. That is, the length of the scraper 7 is equal to the sum of the radius of the clarifier 1, the width of the annular wire mesh demister 4, and the width of the foam annular groove 3. Preferably, the outer peripheral surface of the clarifier 1 and the inner peripheral surface of the overflow ring groove 2 can be integrated, and the outer peripheral surface of the overflow ring groove 2 and the inner peripheral surface of the foam ring groove 3 can be integrated, which saves manufacturing costs and facilitates defoaming.

[0020] Preferably, the overflow annular groove 2 has a depth of 600 mm; the foam annular groove 3 has a depth of 600 mm and a groove width of 200 mm. The annular wire mesh demister 4 has a height of 300 mm and is made of plastic. The structure of the annular wire mesh demister 4 is existing technology and will not be described in detail here. In this embodiment, a 10 mm wide and 3 mm thick thin plastic filament can be used to coil the filament into an annular wire mesh with a width of 300 mm and a thickness of 300 mm. This annular wire mesh has mesh openings, and the annular wire mesh constitutes the annular wire mesh demister 4.

[0021] The clarifier tank 1 is filled with liquid. During the production process, a large amount of foam (in clumps) accumulates on the surface of the clarifier tank 1. The defoaming process of the automatic defoaming device in the clarifier tank is as follows: The motor 8 starts, driving the scraper arm 6 and multiple scrapers 7 to rotate. The scraper 7, corresponding to the position in the clarifier tank 1, will come into contact with a (small amount) of liquid and the foam on the liquid surface. Since the scraper 7 is in an inclined state, when the scraper 7 rotates, it pushes the (small amount) of liquid and the foam on the liquid surface towards the overflow ring groove 2. The foam first comes into contact with the annular wire mesh demister 4. The liquid falls into the overflow ring groove 2 through the mesh of the annular wire mesh demister 4 due to gravity (reducing liquid waste), while the foam is blocked by the annular wire mesh demister 4 (the foam has tension, and the foam is larger than the mesh of the wire mesh demister, so it cannot fall down). The foam continues to be pushed by the scraper 7 towards the foam ring groove 3, where the foam falls into the foam ring groove 3, ultimately achieving the purpose of defoaming. Among them, the annular wire mesh demister 4 plays the role of separating foam and liquid, and also reduces liquid waste.

[0022] The automatic defoaming device for the clarification tank in this embodiment replaces manual defoaming. The scraper 7 and the annular wire mesh demister 4 work together to efficiently remove foam from the liquid surface of the clarification tank 1, effectively preventing foam from flowing into the electrolysis process and improving the heat dissipation performance of the clarification tank 1.

[0023] In one possible implementation, the scraper arm 6 includes a rotating shaft 61 and multiple support arms 62 fixedly connected to the rotating shaft 61. A bearing seat is fixedly installed at the center of the lifting frame 5. The rotating shaft 61 passes through a bearing in the bearing seat and is rotatably connected to the bearing. A motor 8 is fixedly installed on the lifting frame 5. The output shaft of the motor 8 is fixedly connected to the top of the rotating shaft 61 and can drive it to rotate. The multiple support arms 62 are arranged in a ring. Multiple scraper blades 7 are respectively inclinedly installed on the multiple support arms 62, and the scraper blades 7 can be locked and fixed to the support arms 62. The lifting frame 5 supports the motor 8, the scraper arm 6, and the multiple scraper blades 7. Each support arm 62 supports and fixes one scraper blade 7. When the motor 8 is started, it drives the rotating shaft 61 to rotate. The rotating shaft 61 rotates relative to the bearing, thereby driving the multiple support arms 62 and scraper blades 7 to rotate.

[0024] Preferably, the support arm 62 is provided with an inclined surface, and the scraper 7 is fixedly mounted on the inclined surface by nuts and bolts. The scraper 7 is inclined on the support arm 62, and the scraper 7 is also inclined relative to the liquid surface.

[0025] In one possible implementation, an annular guide rail 51 is fixedly mounted on the erecting frame 5. The annular guide rail 51 is located above multiple support arms 62. The annular guide rail 51 has an annular guide groove and an opening communicating with the annular guide groove. Multiple sliders 52 are arranged in the annular guide groove, and each slider 52 is fixedly mounted with a synchronizing rod 53. Each synchronizing rod 53 passes through the opening and is fixedly connected to a support arm 62. When the support arm 62 rotates, it drives the synchronizing rod 53 to rotate, which in turn drives the slider 52 to slide in the annular guide groove. The synchronizing rod 53, slider 52, and annular guide groove further support the support arm 62, improving the stability of the rotation of the multiple support arms 62 and the scraper 7.

[0026] As one possible implementation, a cleaning mechanism is also included. This cleaning mechanism comprises a circular spray frame 9 and multiple nozzles 91. The circular spray frame 9 is fixedly mounted on the support frame 5. The outer diameter of the circular spray frame 9 is the same as the outer diameter of the foam ring groove 3. The circular spray frame 9 is located above multiple support arms 62. A through hole is provided at the center of the circular spray frame 9. The top of the rotating shaft 61 passes through the through hole and is fixedly connected to the output shaft of the motor 8. The multiple nozzles 91 are evenly fixedly mounted on the circular spray frame 9, and their outlets face the clarifier 1, the annular wire mesh demister 4, and the foam ring groove 3, respectively. The through hole, the center of the support frame 5, and the center of the clarifier 1 are aligned in a straight line. After long-term use, the clarifier 1 stops working, allowing for the cleaning of the clarifier 1, the annular wire mesh demister 4, the foam ring groove 3, the multiple support arms 62, and the scraper 7. If a cleaning mechanism and annular guide rail 51 are installed at the same time, the circular spray frame 9 is set above the annular guide rail 51, and the position of the nozzle 91 needs to avoid the annular guide groove.

[0027] An external pipe connects to the nozzle 91, allowing high-pressure water to enter through the pipe. The nozzle 91 sprays high-pressure water to wash the clarifier 1, the annular wire mesh demister 4, the foam ring trough 3, and multiple support arms 62 and scrapers 7. Specifically, some of the high-pressure water directly washes the clarifier 1, some directly washes the annular wire mesh demister 4, and some directly washes the foam ring trough 3. Furthermore, the high-pressure water also washes the support arms 62 and scrapers 7 as it passes through them. The wastewater flows into the clarifier 1, the overflow ring trough 2, and the foam ring trough 3, awaiting further treatment.

[0028] In one possible implementation, each scraper 7 is provided with a downwardly extending, inclined scraper strip 71 at a position corresponding to the clarification tank 1, and the scraper strip 71 is located inside the clarification tank 1. When the scraper 7 rotates, it drives the scraper strip 71 to rotate, and the scraper strip 71 extends into the liquid. The scraper 7 and the scraper strip 71 work together to push (a small amount) of liquid and foam on the liquid surface toward the overflow annular groove 2. The purpose of the scraper strip 71 is to ensure that the foam is completely scraped away. Even if the scraper strip 71 scrapes away some liquid, the liquid will eventually flow into the overflow annular groove 2, and no liquid will be wasted. Moreover, generally, the height of the scraper strip 71 is limited so that the scraper strip 71 extends into the liquid by 1mm to 2mm, so that the scraper strip 71 scrapes away as little liquid as possible while carrying away all the foam.

[0029] In one possible implementation, the overflow annular groove 2 is provided with a fixing part, and multiple fixing parts can be provided. The fixing part includes two fixing frames 21 symmetrically arranged inside the overflow annular groove 2, and the annular wire mesh demister 4 is placed between the two fixing frames 21. The fixing frames 21 are fixed inside the overflow annular groove 2 and have strong stability, thereby keeping the annular wire mesh demister 4 stable. The annular wire mesh demister 4 can be hoisted between the two fixing frames 21 using external lifting equipment. At this time, the annular wire mesh demister 4 is fixed inside the overflow annular groove 2, and the top of the annular wire mesh demister 4 is flush with the top of the overflow annular groove 2. Finally, the top of the clarifier 1, the top of the annular wire mesh demister 4, and the top of the foam annular groove 3 are flush.

[0030] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A clarifier automatic skimming device, characterized by, The system includes an overflow ring groove (2), a foam ring groove (3), and a skimming mechanism. The overflow ring groove (2) and the foam ring groove (3) are fixedly arranged outside the clarifier (1) from the inside to the outside. An annular wire mesh demister (4) is installed inside the overflow ring groove (2). The top of the clarifier (1), the top of the annular wire mesh demister (4), and the top of the foam ring groove (3) are flush. The skimming mechanism includes a lifting frame (5), a scraper arm (6), and multiple scrapers (7). The lifting frame (5) is fixedly arranged outside the foam ring groove (3). The scraper arm (6) is rotatably arranged on the lifting frame (5) and located above the clarifier (1). Multiple scrapers (7) are evenly inclined and arranged on the scraper arm (6). The lower part of each scraper (7) is located at the top of the clarifier (1), the top of the annular wire mesh demister (4), and the top of the foam ring groove (3).

2. The automatic defoaming device for a clarifier according to claim 1, characterized in that, The scraper arm (6) includes a rotating shaft (61) and multiple support arms (62) fixedly connected to the rotating shaft (61). A bearing seat is fixedly provided at the center of the lifting frame (5). The rotating shaft (61) passes through the bearing in the bearing seat and is rotatably connected to the bearing. A motor (8) is fixedly provided on the lifting frame (5). The output shaft of the motor (8) is fixedly connected to the top of the rotating shaft (61) and can drive it to rotate. The multiple support arms (62) are arranged in a ring. The multiple scrapers (7) are respectively inclinedly arranged on the multiple support arms (62).

3. The automatic defoaming device for a clarifier according to claim 2, characterized in that, An annular guide rail (51) is fixedly installed on the erecting frame (5). The annular guide rail (51) is located above multiple support arms (62). The annular guide rail (51) is provided with an annular guide groove and an opening communicating with the annular guide groove. Multiple sliders (52) are provided in the annular guide groove. Each slider (52) is fixedly provided with a synchronizing rod (53). Each synchronizing rod (53) passes through the opening and is fixedly connected to the support arm (62).

4. The automatic defoaming device for a clarifier according to claim 2, characterized in that, It also includes a cleaning mechanism, which includes a circular spray frame (9) and multiple nozzles (91). The circular spray frame (9) is fixedly mounted on the erector (5). The outer diameter of the circular spray frame (9) is the same as the outer diameter of the foam ring groove (3). The circular spray frame (9) is located above multiple support arms (62). A through hole is provided at the center of the circular spray frame (9). The top of the rotating shaft (61) passes through the through hole and is fixedly connected to the output shaft of the motor (8). The multiple nozzles (91) are evenly fixedly mounted on the circular spray frame (9). The outlets of the multiple nozzles (91) are respectively facing the clarifier (1), the annular wire mesh demister (4), and the foam ring groove (3).

5. The automatic defoaming device for a clarifier according to claim 1, characterized in that, Each of the scrapers (7) is provided with a scraper (71) extending downward at a position corresponding to the clarification tank (1), and the scraper (71) is located inside the clarification tank (1).

6. The automatic defoaming device for a clarifier according to claim 1, characterized in that, The overflow ring groove (2) is provided with a fixing part, which includes two fixing frames (21) symmetrically arranged inside the overflow ring groove (2), and the annular wire mesh demister (4) is placed between the two fixing frames (21).

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