Maintenance-free remote mechanical defoaming equipment, alkaline solution circulation tanks, and oil and grease separation systems.

Abstract

This invention relates to the field of defoaming technology, providing a maintenance-free, remote mechanical defoaming device, comprising a housing, a defoaming impeller for removing foam, and a motor for driving the impeller. The defoaming impeller is located inside the housing, which has a suction section for foam to enter. It also includes a impeller shaft, with the defoaming impeller mounted on the shaft. The impeller shaft is coaxially connected to the motor shaft via a coaxial sealing assembly. Near the suction section, a maintenance-free sealing assembly is also provided. It also provides a circulating alkaline solution tank, including the aforementioned maintenance-free, remote mechanical defoaming device. Furthermore, it provides a grease separation system, including the aforementioned maintenance-free, remote mechanical defoaming device. This invention utilizes a maintenance-free sealing assembly and a coaxial sealing assembly to simultaneously seal the motor, ensuring effective sealing performance.

Description

Remote maintenance-free mechanical defoaming device, alkali circulation tank and degreasing system Technical Field

[0001] The invention relates to the technical field of defoaming, in particular to a remote maintenance-free mechanical defoaming device, an alkali solution circulation tank and a degreasing system. Background Art

[0002] In the steel, chemical, pharmaceutical, and food industries, the chemical media used in production processes are prone to producing harmful foam. If the foam is not promptly and effectively addressed, it can harm production processes and equipment, damaging equipment, affecting product quality, and even reducing production capacity. For example, in the steel strip processing industry, a degreasing section is required to clean the strip surface after rolling, free of contaminants such as grease, scale powder, iron powder, and carbon dust. Because the degreasing agent contains surfactants, under the influence of agitation and temperature, it can trap air and produce large amounts of foam. Overflowing the container can damage surrounding motors and pollute the environment. If the foam overflows into the strip cleaning tank, it can compromise the strip cleaning effect.

[0003] Currently, most industries use chemical defoamers to eliminate foam in media by changing the surface tension and reducing the thickness of the foam film. However, chemical defoamers themselves are expensive and have a limited duration of effectiveness, necessitating regular additions during production, resulting in high production costs. Furthermore, chemical defoamers are difficult to degrade, and direct discharge can easily pollute the environment, resulting in high disposal costs.

[0004] Initial attempts in the industry to utilize mechanical defoaming devices, particularly centrifugal defoaming devices, have proven highly efficient. However, since centrifugal defoaming utilizes a motor and impeller, high-speed impeller operation can damage the motor if liquid-laden fluid enters the motor. Prolonged impeller operation or a long impeller shaft can lead to instability, ultimately rendering the centrifugal defoaming method ineffective or even damaging the equipment. The device's main components in contact with the media are susceptible to wear due to prolonged exposure to the high pressure, high-speed fluid flow, and foam generated by the impeller, resulting in frequent maintenance.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a remote maintenance-free mechanical defoaming device, an alkali solution circulation tank and a degreasing system, which can at least solve some of the defects in the prior art.

[0007] To achieve the above-mentioned purpose, an embodiment of the present invention provides the following technical solution: a remote maintenance-free mechanical defoaming device, comprising a shell, a defoaming impeller for eliminating foam, and a motor for driving the defoaming impeller to rotate, the defoaming impeller being arranged in the shell, the shell having a suction section for foam to enter the shell, and also comprising an impeller connecting shaft, the defoaming impeller being arranged on the impeller connecting shaft, the impeller connecting shaft and the motor shaft of the motor being coaxially connected through a coaxial sealing assembly, and a maintenance-free sealing assembly being also provided on the side of the coaxial sealing assembly close to the suction section.

[0008] Furthermore, the coaxial sealing assembly includes a coupling, and the impeller connecting shaft and the motor shaft are coaxially connected through the coupling.

[0009] Furthermore, the coaxial sealing assembly also includes bearings for supporting the motor shaft and the impeller connecting shaft.

[0010] Furthermore, the coaxial sealing assembly further includes a bearing cover for fixing the axial position of the bearing, and the bearing cover is located between the coupling and the bearing.

[0011] Furthermore, a bearing sealing box is provided outside the impeller connecting shaft.

[0012] Furthermore, the maintenance-free sealing assembly includes a dynamic and static ring and a gravity block that can drive the dynamic and static ring to be close to the motor shaft when stationary.

[0013] Furthermore, it also includes an auxiliary impeller that can generate pressure in the opposite direction to the defoaming impeller, and the auxiliary impeller is installed on the motor shaft.

[0014] Furthermore, a sliding bearing is provided at one end of the impeller connecting shaft away from the motor.

[0015] An embodiment of the present invention provides another technical solution: an alkaline solution circulation tank, comprising the above-mentioned remote maintenance-free mechanical defoaming device.

[0016] An embodiment of the present invention provides another technical solution: a degreasing system, comprising the above-mentioned remote maintenance-free mechanical defoaming device.

[0017] Compared with the prior art, the present invention has the beneficial effect of using a maintenance-free sealing component and a coaxial sealing component in combination to achieve sealing of the motor, thereby ensuring sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic cross-sectional view of a defoaming device (with a self-flushing structure) provided by an embodiment of the present invention from a front view perspective;

[0019] FIG2 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention from a front view perspective (the motor shaft is lengthened and has a self-flushing structure);

[0020] FIG3 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention (with a maintenance-free sealing function) from a front perspective;

[0021] FIG4 is a schematic cross-sectional view of a defoaming device provided by an embodiment of the present invention from a front view perspective (having a long-distance defoaming function);

[0022] FIG5 is a schematic cross-sectional view from a front perspective of a defoaming device provided by an embodiment of the present invention (having a maintenance-free sealing function and a remote defoaming function);

[0023] FIG6 is a schematic diagram of a defoaming device provided by an embodiment of the present invention from a top view;

[0024] FIG7 is a functional block diagram of an online detection system for alkali solution concentration of an alkali solution circulation tank provided by an embodiment of the present invention;

[0025] FIG8 is a schematic side view of the structure of an electromagnetic filter provided in an embodiment of the present invention;

[0026] FIG9 is a schematic diagram of a top view of the electromagnetic filter provided in an embodiment of the present invention;

[0027] FIG10 is a schematic diagram of the front structure of an electromagnetic filter provided in an embodiment of the present invention;

[0028] FIG11 is a schematic structural diagram of an iron sludge processing subsystem according to an embodiment of the present invention;

[0029] FIG12 is a top view of FIG11;

[0030] FIG13 is a schematic structural diagram of an iron sludge collection box provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1:

[0033] Referring to Figures 1, 2, and 6, an embodiment of the present invention provides a self-flushing structure comprising a flow guide 200 extending to the flushed part and a drive element for driving flushing liquid along the flow guide 200 to the flushed part. The flow guide 200 is hood-shaped, with the cover of the flow guide 200 serving as a flow guide surface. The drive element is located within the cover of the cover. In this embodiment, the hood-shaped flow guide 200 allows the flushed part to be located in the center of the flow guide 200. This allows the flushing liquid driven by the drive element to flow along the cover toward the flushed part, thereby flushing the flushed part. Furthermore, the use of a cover allows for a wider flow guide surface, resulting in a more effective flushing effect. The purpose of flushing can be either decontamination or cooling. Placing the drive element within the cover makes the structure more compact and facilitates the design of a variety of drive types.

[0034] Referring to Figures 1, 2, and 6, the drive element includes a suction-generating impeller 14, mounted directly below the cover. In this embodiment, when the impeller 14 rotates, a certain suction is generated within the cover, drawing the flushing liquid upward. When the rotational speed is high, the drawn-up flushing liquid flows along the direction of the cover and onto the items to be flushed. Of course, this is only one method of driving the flushing liquid. Alternatively, a pump or other suction-generating structure could be used to draw the flushing liquid toward the items to be flushed, which is also feasible and not limited in this embodiment.

[0035] 1, 2 and 6, the cover body includes an arc-shaped plate, which forms the guide surface with a smooth curved surface. In this embodiment, the arc-shaped guide surface can facilitate the flushing liquid to "climb" onto the flushed parts.

[0036] As a further optimization of the above solution, referring to Figures 1, 2, and 6, the curved plate bends away from the drive member. In this embodiment, the curved plate is generally outwardly flared, like a pot lid, facilitating the upward flow and diversion of the rinse liquid. Of course, a reverse curvature is also feasible, and this embodiment does not limit this.

[0037] As an optimized solution for an embodiment of the present invention, please refer to Figures 1, 2, and 6. The curved plates are multiple in number, with adjacent curved plates spliced ​​together. In this embodiment, the housing can be constructed from multiple panels, for example, by welding or other methods of splicing to facilitate transportation and assembly. The housing is preferably sealed during assembly. Of course, a single, integrally formed panel would provide even better results. The splicing methods can include welding, bonding, and other methods.

[0038] As an optimized solution of an embodiment of the present invention, referring to Figures 1, 2, and 6, the cover includes an inclined flat plate, the inclined surface of which serves as the guide surface. In this embodiment, in addition to using a curved plate, an inclined flat plate is also feasible, which can also facilitate the flushing liquid to "climb" up the flat plate to the items to be flushed.

[0039] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6, the flat plate has multiple pieces, and two adjacent flat plates are spliced ​​together. In this embodiment, the flat plate can also be multiple pieces, which can be spliced ​​together or integrally formed.

[0040] As an optimized solution of the embodiment of the present invention, referring to Figures 1, 2, and 6, the housing further includes a liquid reservoir 201, into which the other end of the housing extends. In this embodiment, when the defoaming impeller 13 draws foam into the housing 5 and defoams, some of the liquid medium that strikes the inner wall of the housing 5 enters the liquid reservoir 201, thereby facilitating the supply of liquid medium to the flow guide 200.

[0041] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6. The auxiliary impeller 14 has a flow channel for the liquid medium to pass through. In this embodiment, the auxiliary impeller 14 is also designed with a flow channel for the liquid medium to pass through, which facilitates the rise of the liquid medium.

[0042] Example 2:

[0043] Please refer to Figures 1, 2 and 6. An embodiment of the present invention provides a defoaming device, comprising a housing 5 and a defoaming impeller 13 for eliminating foam. The defoaming impeller 13 is arranged in the housing 5. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. It also includes the above-mentioned self-flushing structure 20, which is arranged in the housing 5. In this embodiment, the above-mentioned self-flushing structure 20 is arranged in the housing 5, so that the defoaming device has the ability to self-flushed the components that drive the defoaming impeller 13 to rotate, and no external pipeline is required for flushing, which reduces the difficulty of installation and saves energy. Preferably, the housing 5 can be cylindrical or rectangular. Preferably, the defoaming impeller 13 can be one or more combined impellers, and the impeller can be an axial flow type impeller or a fan type impeller. In addition, the impeller can be a plate-type welded impeller or a cast impeller. The suction section 17 is welded with a bell mouth below the suction pipe to expand the suction area and improve the suction efficiency.

[0044] As an optimized solution of an embodiment of the present invention, please refer to Figures 1, 2, and 6. The motor 10 further includes a motor 10 disposed on the housing 5. The motor shaft 100 of the motor 10 extends into the housing 5, and the defoaming impeller 13 is mounted on the motor shaft 100. In this embodiment, when the driving member is a secondary impeller 14, the secondary impeller 14 is also mounted on the motor shaft 100. The component that drives the defoaming impeller 13 to rotate can be the motor 10, and both the secondary impeller 14 and the defoaming impeller 13 can be driven to rotate by the motor 10. After the defoaming impeller 13 removes foam, the secondary impeller 14 also draws the liquid medium upward to the guide member 200. The liquid medium on the guide member 200 flows onto the items to be rinsed, then flows down again, and then remixes with the defoamed liquid medium below, which is drawn up again, thereby achieving self-circulating rinsing of the items to be rinsed. Preferably, the motor 10 can be one of an industrial frequency motor 10, a variable frequency motor 10, an explosion-proof or non-explosion-proof type, or a high-efficiency or standard type. The motor shaft 100 is clamped in one step and the whole shaft is machined in one step. This part successfully solves the problem of reliable connection between the motor 10 and the defoaming impeller 13, with good concentricity and reliable and stable operation of the device.

[0045] 1, 2 and 6, the embodiment of the present invention further includes a sealing structure 18 for sealing the motor shaft 100. In this embodiment, the sealing structure 18 is used to seal the motor 10 to prevent liquid from entering the motor 10 and causing damage to the motor 10.

[0046] To further optimize the above technical solution, referring to Figures 1, 2, and 6, the sealing structure 18 is a mechanical sealing structure 18, and the flow guide 200 extends to the mechanical sealing structure 18. In this embodiment, the sealing method can adopt the mechanical sealing structure 18. The mechanical sealing structure 18 is the most effective and stable sealing method. However, mechanical seals require flushing and cooling. In this embodiment, the defoamed medium can be flowed along the flow guide 200 to the mechanical sealing structure 18 for cooling. The aforementioned flushed part can be the mechanical sealing structure 18. This eliminates the need for fresh water for cooling, significantly saving production costs. In addition, the flow guide 200 covers the medium and can also cooperate with the sealing structure 18 to provide a certain sealing effect. Because it not only achieves self-circulating flushing, but also guides the liquid to flow downward, completely isolating the foam flow and liquid flow in the container from the motor 10. The foam flow or liquid flow caused by the positive or negative pressure generated by the foaming medium in the container will not damage the motor 10. Preferably, the mechanical seal can include a non-container mechanical seal or a container mechanical seal. Its function is to effectively seal and isolate the foam flow and the medium flow from entering the motor 10 or the external environment along the shaft.

[0047] To further optimize the above technical solution, referring to Figures 1, 2 and 6, a sealing box 19 is provided outside the mechanical sealing structure 18, and the flow guide 200 passes through the sealing box 19 to the mechanical sealing structure 18. Using the sealing box 19 outside the mechanical sealing structure 18 can improve the sealing effect.

[0048] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. A guide box 16 is provided at the bottom of the shell 5. In this embodiment, the motor 10 drives the defoaming impeller 13 to rotate through the motor shaft 100, the sealing structure 18 and the auxiliary impeller 14. After the defoaming impeller 13 rotates, a suction force is formed. The foam generated on the surface of the container is sucked into the inlet of the defoaming impeller 13 by the suction section 17 arranged along the shape of the container. The defoaming impeller 13 utilizes the shear force and compression effect generated by the impeller to break the bubbles, separate the gas and liquid, and the liquid is thrown toward the shell 5 by the inertial force. The liquid generated after defoaming flows along the shell 5 into the guide box 16. The guide box 16 further dissipates the energy of the fluid after defoaming and disperses it into the container to avoid conflict with the foam flow. Preferably, the guide box 16 is a plate-type welded multi-block threaded structure. A circle of cylinders is welded on the upper surface of the suction section 17, and the cylinder is connected to the shell 5 by threads.

[0049] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. The above-mentioned liquid storage tank 201 is arranged on the shell 5. When the defoaming impeller 13 attracts foam into the shell 5 and defoams, some of the liquid medium that hits the inner wall of the shell 5 will enter the liquid storage tank 201. This part of the liquid medium will flow along the guide member 200 to the sealing structure 18 to flush and cool the sealing structure 18.

[0050] As an optimized solution of the embodiment of the present invention, please refer to Figures 1, 2 and 6, which also includes a mouth ring 15 provided at the suction section 17. In this embodiment, the mouth ring 15 is added between the suction port and the inner cavity of the defoaming impeller 13, thereby improving the sealing of the suction port of the defoaming impeller 13, reducing wear, improving the suction force of the defoaming impeller 13, preventing internal circulation, and increasing the efficiency of the defoaming impeller 13.

[0051] As an optimized solution for an embodiment of the present invention, referring to Figures 1, 2, and 6, the motor 10 is mounted on a mounting base 11, which is located above the housing 5. Mounting base 11 is mounted on the top of the container, sized to match the container. The motor 10 is directly connected to mounting base 11, reducing the weight and volume of the device. Preferably, mounting base 11 can be a circular flange, a square flange, or a steel frame.

[0052] As an optimization scheme of an embodiment of the present invention, please refer to Figures 1, 2 and 6. The end of the motor shaft 100 away from the motor 10 is provided with a sliding bearing 6. In this embodiment, when the foam to be absorbed is in a deeper position, it is necessary to lengthen the motor shaft 100 or lengthen the impeller connecting shaft 12, and a sliding bearing 6 can be provided at the shaft end to ensure that the shaft and the parts on the shaft operate stably and reliably. Preferably, the sliding bearing 6 includes a housing, a wear-resistant bushing and a shaft sleeve, and the sliding friction between the bushing and the shaft sleeve realizes the functions of shock absorption and support, and balances the radial force generated during operation or unstable rotation of the long shaft. This part is fixed by welding a bracket in the suction section 17.

[0053] Example 3:

[0054] Referring to Figures 3 and 6, an embodiment of the present invention provides a maintenance-free defoaming device. This device is modified from the above-mentioned defoaming device by eliminating the self-flushing structure 20 and adding a maintenance-free sealing assembly 30. Specifically, the device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is disposed within the housing 5 and is coaxially connected to a motor shaft 100 of the motor 10. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. The device also includes a maintenance-free sealing assembly 30 for sealing the motor shaft 100. The maintenance-free sealing assembly 30 is disposed on a side of the defoaming impeller 13 away from the suction section 17. In this embodiment, the use of the maintenance-free sealing assembly 30 can prevent liquid medium from entering the motor 10 and burning the motor 10.

[0055] As an optimized solution of an embodiment of the present invention, referring to Figures 3 and 6 , the maintenance-free seal assembly 30 includes a dynamic and static ring and a weight block that can drive the dynamic and static rings to contact the motor shaft 100 when at rest. In this embodiment, when the device stops operating, the weight block can force the dynamic and static rings to contact the motor shaft 100 to achieve a stop seal.

[0056] Further optimizing the above solution, referring to Figures 3 and 6, further includes an auxiliary impeller 14 capable of generating pressure in a direction opposite to that of the defoaming impeller 13, and the auxiliary impeller 14 is mounted on the motor shaft 100. In this embodiment, when the device is operating, the gravity block rotates and drives the dynamic and static rings, causing the dynamic and static rings to separate from the motor shaft 100. At this time, the auxiliary impeller 14 operates. Since its pressure direction is opposite to that generated by the defoaming impeller 13, it prevents high-pressure medium from leaking into the sealed chamber where the maintenance-free sealing device is located during device operation. The auxiliary impeller 14 used in conjunction with the auxiliary impeller 14 also serves to balance the axial force.

[0057] As for other structures of the defoaming device, please refer to the above embodiments and will not be described again here.

[0058] Example 4:

[0059] Please refer to Figures 4 and 6. An embodiment of the present invention provides a long-distance defoaming device, including a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate, wherein the defoaming impeller 13 is arranged in the housing 5, and the housing 5 has a suction section 17 for foam to enter the housing 5, and further includes an impeller connecting shaft 12, wherein the defoaming impeller 13 is arranged on the impeller connecting shaft 12, and the impeller connecting shaft 12 is coaxially connected to the motor shaft 100 of the motor 10 through a coaxial sealing component 40. In this embodiment, when the defoaming distance is relatively far, an impeller connecting shaft 12 can be added for the installation of the defoaming impeller 13, thereby achieving a better defoaming effect. At this time, the impeller connecting shaft 12 needs to be coaxially connected to the motor shaft 100, and the coaxial sealing component 40 can play a sealing role to prevent the liquid medium from entering the motor 10 and burning the motor 10.

[0060] As an optimized solution of an embodiment of the present invention, referring to Figures 4 and 6 , the coaxial seal assembly 40 includes a coupling 400, through which the impeller connecting shaft 12 and the motor shaft 100 are coaxially connected. In this embodiment, the coupling 400 connects the motor shaft 100 and the impeller connecting shaft 12, transmitting the power and torque of the motor 10 to the shaft and its components. It also serves as a safety device, preventing liquid media from flowing along the shaft into the motor 10 and causing burns.

[0061] To further optimize the above solution, see Figures 4 and 6 . The coaxial seal assembly 40 also includes a bearing 401 for supporting the motor shaft 100 and the impeller connecting shaft 12. In this embodiment, the bearing 401 can be an angular contact ball bearing 401 or a deep groove ball bearing 401, capable of balancing both axial and radial forces. This component supports the shaft, reduces friction and wear, and reduces noise.

[0062] As a further optimization of the above solution, referring to Figures 4 and 6 , the coaxial seal assembly 40 further includes a bearing gland 402 for securing the axial position of the bearing 401. The bearing gland 402 is located between the coupling 400 and the bearing 401. In this embodiment, the gland is equipped with an oil cup or oil filling line and valve to facilitate lubricating oil replenishment. The inner bore is equipped with one or a combination of a packing seal, a skeleton oil seal, a labyrinth seal, and a dry gas seal to prevent oil leakage.

[0063] As an optimized solution of the embodiment of the present invention, referring to Figures 4 and 6 , a bearing sealing housing 403 is provided outside the impeller connecting shaft 12. In this embodiment, the bearing sealing housing 403 cooperates with the bearing gland 402 to isolate the bearing 401 from the external environment to form a sealed space, while also supporting the bearing 401 to enable stable and reliable operation. The bearing sealing housing 403 can be located inside the container, in contact with the medium and effectively isolating it, or it can be located outside the container.

[0064] As an optimized solution of the embodiment of the present invention, referring to Figures 4 and 6 , a sealing structure 18 is also included for sealing. The sealing structure 18 is disposed on a side of the coaxial sealing assembly 40 near the suction section 17. In this embodiment, in addition to the coaxial sealing assembly 40 described above, the sealing structure 18 can also be used for sealing. The specific sealing sequence is that the sealing structure 18 performs the sealing first. If the coaxial sealing assembly 40 fails to block the liquid medium, the sealing structure 18 can also block the liquid medium from the motor 10.

[0065] To further optimize the above solution, please refer to FIG. 4 and FIG. 6 . The sealing structure 18 may adopt the sealing structure 18 in the above embodiment 2, and its specific structure will not be described in detail here.

[0066] As for other structures of the defoaming device, please refer to the above embodiments and will not be described again here.

[0067] Embodiment 5:

[0068] Referring to Figures 5 and 6, an embodiment of the present invention provides a remote maintenance-free mechanical defoaming device, which is composed of the maintenance-free seal of Example 3 and the remote defoaming of Example 5, forming a defoaming device with maintenance-free sealing and remote defoaming functions. Specifically, the device includes a housing 5, a defoaming impeller 13 for removing foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is arranged in the housing 5, and the housing 5 has an intake section 17 for allowing foam to enter the housing 5. The motor 10 also includes an impeller connecting shaft 12, and the defoaming impeller 13 is arranged on the impeller connecting shaft 12. The impeller connecting shaft 12 is coaxially connected to the motor shaft 100 of the motor 10 via a coaxial sealing assembly 40. A maintenance-free sealing assembly 30 is also provided on the side of the coaxial sealing assembly 40 near the intake section 17. In this embodiment, when the defoaming distance is relatively long, an additional impeller connecting shaft 12 can be provided for the defoaming impeller 13 to be installed, thereby achieving a better defoaming effect. At this time, the impeller connecting shaft 12 needs to be coaxially connected to the motor shaft 100. The coaxial sealing assembly 40 can play a sealing role to prevent the liquid medium from entering the motor 10 and burning the motor 10. At the same time, the maintenance-free sealing assembly 30 is also used to achieve a double sealing effect, thereby greatly improving the sealing performance and making the device maintenance-free.

[0069] As an optimization solution of the embodiment of the present invention, please refer to Figures 5 and 6. The coaxial sealing assembly 40 and the maintenance-free sealing assembly 30 can be referred to in Example 3 and Example 4, and will not be described in detail here.

[0070] Example 6:

[0071] Please refer to Figures 1 to 6. An embodiment of the present invention provides a defoaming device. The defoaming device of this embodiment is a variation of the embodiment 2. A good sealing effect can also be achieved by removing the self-flushing structure 20. Specifically, the defoaming device includes a housing 5, a defoaming impeller 13 for eliminating foam, and a motor 10 for driving the defoaming impeller 13 to rotate. The defoaming impeller 13 is arranged in the housing 5. The housing 5 has a suction section 17 for allowing foam to enter the housing 5. It also includes an auxiliary impeller 14 that can generate a pressure direction opposite to that of the defoaming impeller 13. The auxiliary impeller 14 is mounted on the motor shaft 100, and the auxiliary impeller 14 is located on the side of the defoaming impeller 13 close to the motor 10. In this embodiment, since the pressure direction of the auxiliary impeller 14 is opposite to the pressure direction generated by the defoaming impeller 13 when it is working, it can prevent the high-pressure medium from leaking into the motor 10 and burning the motor 10. In addition, the auxiliary impeller 14 can also play a role in balancing the axial force.

[0072] As for other structures of the defoaming device, please refer to the above-mentioned embodiment 2, which will not be described here in detail.

[0073] Embodiment seven:

[0074] Please refer to FIG7 . An embodiment of the present invention provides an alkali solution circulation tank, and the defoaming device in the above embodiments is used to defoam the reaction medium in the alkali solution circulation tank.

[0075] As an optimization solution of an embodiment of the present invention, please refer to FIG7 , the alkali solution circulation tank also includes an alkali solution concentration online detection system and an alkali solution concentration online detection method corresponding to the system. Specifically:

[0076] As shown in FIG7 , an online detection method for alkali solution concentration includes the following steps:

[0077] S1, obtain the alkali solution concentration and the corresponding alkali solution surface tension, take the alkali solution concentration as the dependent variable y, the corresponding alkali solution surface tension as the independent variable x, and establish the alkali solution concentration prediction model y=a0+a1x+a2x 2 +…+a n x n ; Among them, a0, a1 to a n are model parameters;

[0078] S2, training the alkali solution concentration prediction model until the predicted alkali solution concentration deviation is controlled within an allowable range;

[0079] S3, obtain the real-time alkali solution surface tension as the independent variable x s , substitute the trained alkali solution concentration prediction model to obtain the corresponding real-time alkali solution concentration prediction value y s ;

[0080] S4, according to the real-time alkali solution concentration predicted value y s , adjust the real-time alkali solution concentration to the alkali solution concentration set value.

[0081] In some embodiments, the supply end may specifically be a compressed air station.

[0082] Different from the off-line sampling and testing method used in the related art for alkali solution concentration detection, the technical solution disclosed in the present invention realizes online detection of alkali solution concentration. On the basis of online detection of alkali solution concentration, automatic control of alkali solution concentration is realized to ensure the stability of alkali solution concentration, the cleaning quality of strip steel is guaranteed, and hysteresis is small. The cleaning ability of alkali solution is represented by the surface tension of alkali solution, which has good representativeness. The relationship between alkali solution concentration and alkali solution surface tension is established by soft measurement method, and the alkali solution concentration prediction model can continuously learn through training, thereby achieving very high accuracy. In addition, the original alkali solution, desalted water or waste alkali solution can be replenished based on the alkali solution concentration, and the alkali solution concentration fluctuates little.

[0083] It should be noted that the technical solution of the present disclosure does not limit the order of steps S1, S2, S3, and S4. That is, step S1 can be executed before steps S2, S3, and S4, or after steps S2, S3, and S4, or simultaneously with steps S2, S3, and S4. The order of the steps is also not limited.

[0084] In a specific implementation scenario:

[0085] First, the surface tension data of alkali solution at different alkali solution concentrations are collected and stored in the alkali solution concentration online detection and automatic control computer. The alkali solution concentration data are collected through offline sampling and testing. The alkali solution concentration is used as the dependent variable y and the alkali solution surface tension is used as the independent variable x. The alkali solution concentration prediction model y = a0 + a1x + a2x is established. 2 +…+a n x n After accumulating a certain amount of sample data of alkali solution concentration and alkali solution surface tension, the least squares method is used to perform regression training based on the sample data of alkali solution concentration and alkali solution surface tension until the deviation of the predicted alkali solution concentration is controlled within the allowable range.

[0086] Secondly, the real-time data of the alkali solution surface tension is collected through the alkali solution surface tension online detector, and the trained alkali solution concentration prediction model is called to calculate the real-time alkali solution concentration.

[0087] Finally, the alkali solution concentration automatic control module is run. This module compares the set alkali solution concentration data with the real-time alkali solution concentration data. Using the electrolyte circulation tank level and the alkali solution circulation tank level as constraints, it replenishes desalted water if the real-time alkali solution concentration is too high. If the real-time alkali solution concentration is too low, it replenishes the original alkali solution. If the real-time alkali solution concentration falls below a certain threshold, the alkali solution is discharged, achieving automatic alkali solution concentration control. This ensures a stable alkali solution concentration and guarantees the strip cleaning quality.

[0088] The present disclosure also provides an online detection system for alkali solution concentration, which can be used to implement any of the above-mentioned online detection methods for alkali solution concentration. The online detection system for alkali solution concentration includes:

[0089] The modeling module is configured to obtain the alkali solution concentration and the corresponding alkali solution surface tension, with the alkali solution concentration as the dependent variable y and the corresponding alkali solution surface tension as the independent variable x, and establish the alkali solution concentration prediction model y=a0+a1x+a2x 2 +…+a n x n ; Among them, a0, a1 to a n are model parameters;

[0090] a training module configured to perform regression training on the alkali solution concentration prediction model using a least squares method until the deviation of the predicted alkali solution concentration is controlled within an allowable range;

[0091] The detection module is configured to obtain the real-time alkali solution surface tension as an independent variable xs, and substitute it into the trained alkali solution concentration prediction model to obtain the corresponding real-time alkali solution concentration prediction value ys;

[0092] The alkali solution concentration automatic control module is configured to adjust the real-time alkali solution concentration to the alkali solution concentration set value according to the real-time alkali solution concentration predicted value ys.

[0093] As shown in Figure 7, the alkali solution concentration automatic control module includes an online alkali solution concentration detection and automatic control computer, industrial Ethernet, the alkali wash process section PLC, and shut-off valves 1, 2, 3, 4, 5, and 6. The detection module includes liquid level gauges 1 and 2, and online alkali solution surface tension detectors 1 and 2. The online alkali solution concentration detection and automatic control computer communicates with the alkali wash process section PLC via industrial Ethernet.

[0094] The alkali concentration online detection and automatic control computer communicates with the alkali wash process PLC to collect data and issue commands for the alkali wash process. The alkali wash process PLC is connected to liquid level gauges 1 and 2, online alkali surface tension detectors 1 and 2, shut-off valves 1, 2, 3, 4, 5, and 6, collecting real-time information such as the electrolyte circulation tank alkali level, the electrolyte circulation tank alkali level, the electrolyte circulation tank alkali surface tension, and the electrolyte circulation tank alkali surface tension. The alkali concentration automatic control module compares the set alkali concentration data with the real-time alkali concentration data. Using the electrolyte circulation tank level and the alkali circulation tank level as constraints, the module replenishes desalted water if the real-time alkali concentration is too high, and replenishes original alkali water if the real-time alkali concentration is too low. If the real-time alkali concentration falls below a certain threshold, the waste alkali is discharged, achieving automatic alkali concentration control. This ensures stable alkali concentration and guaranteed strip cleaning quality.

[0095] Embodiment 8:

[0096] As shown in FIG8-FIG10 , this embodiment provides an electromagnetic filter 100 , which can be used in the above-mentioned embodiment 1 as the magnetic filter 15 therein.

[0097] The electromagnetic filter 100 includes a filter tank 101, a filter disc 102 and an impurity collector 103. The filter disc 102 includes an annular bracket 1021, multiple electromagnetic suction cups 1022 and an electronic control unit for controlling the power supply and loss of each electromagnetic suction cup 1022. Each electromagnetic suction cup 1022 is installed on the annular bracket 1021 and is distributed in an annular shape along the circumference of the annular bracket 1021. The annular bracket 1021 is equipped with a rotating drive mechanism 105 for driving its rotation; the annular bracket 1021 is partially located in the filter tank 101, and the impurity collector 103 is arranged outside the filter tank 101 and includes an impurity removal part for driving impurities from the electromagnetic suction cup 1022.

[0098] In one embodiment, the above-mentioned annular bracket 1021 includes an inner ring frame and an outer ring frame, and the inner ring frame and the outer ring frame are connected by a plurality of spokes. Each spoke divides the annular area between the inner ring frame and the outer ring frame into a plurality of suction cup mounting positions, and each suction cup mounting position is installed with an electromagnetic suction cup 1022.

[0099] Optionally, as shown in FIG11 , the spokes are distributed along the radial direction of the annular support 1021 , and the inner ring frame-spoke-outer ring frame are connected to form a hub shape.

[0100] The electromagnetic chuck 1022 is preferably detachably mounted on the annular bracket 1021 , including but not limited to methods such as fixing with screws.

[0101] The disk surface of the electromagnetic suction cup 1022 is preferably coplanar with the corresponding side surface of the annular bracket 1021. This not only facilitates the removal of impurities on the electromagnetic suction cup 1022, but also prevents the formation of some corners between the electromagnetic suction cup 1022 and the annular bracket 1021, which may cause dirt to accumulate.

[0102] Preferably, the annular bracket 1021 is connected to the rotation drive mechanism 105 via the bracket shaft 104 , and the rotation drive mechanism 105 drives the bracket shaft 104 to rotate, thereby driving the annular bracket 1021 and the electromagnetic suction cup 1022 on the annular bracket 1021 to rotate.

[0103] In one embodiment, the above-mentioned rotation drive mechanism 105 adopts a motor + transmission component structure, and the transmission component can be a sprocket drive, a pulley drive, etc.; the motor is preferably a variable frequency motor, which can control the rotation speed of the annular bracket 1021.

[0104] Preferably, the electric control unit includes a plurality of electric control cables and an electric control module. The number of the electric control cables is the same as the number of the electromagnetic suction cups 1022 and they are connected one-to-one. Each of the electric control cables is electrically connected to the electric control module.

[0105] In one embodiment, the support shaft 104 is a hollow shaft, and each of the electrical cables is routed through the hollow cavity of the support shaft 104. This approach facilitates the routing of the electrical cables and provides increased safety and reliability. Preferably, a wiring hole is provided in the annular support 1021 (e.g., an inner ring frame) to facilitate the entry of the electrical cables into the support shaft 104; a wiring channel is also provided in the electromagnetic chuck 1022 to connect the electrical cables to the coil within the electromagnetic chuck 1022.

[0106] Preferably, the annular bracket 1021 is detachably mounted on the bracket shaft 104. In one embodiment, the bracket shaft 104 is designed in sections, with the annular bracket 1021 clamped between two shaft segments 1041 of the bracket shaft 104 (generally, the inner ring bracket is clamped between the two shaft segments 1041 of the bracket shaft 104); optionally, a shaft shoulder is machined on the shaft segment 1041, and both ends of the inner hole of the inner ring bracket adopt a stepped hole structure. The shaft neck portion of the shaft segment 1041 is inserted into the large-diameter hole segment of the corresponding side stepped hole structure, and the shaft shoulder of the shaft segment 1041 abuts against the corresponding side end face of the inner ring bracket, and the two are fixed by screws.

[0107] Furthermore, when the rotating shaft segment 1041 and the inner ring frame are assembled, the electromagnetic suction cup 1022 can be further clamped between the two. For example, the outer ring wall of the inner ring frame adopts a stepped shaft structure, and a clamping groove is formed between the shaft shoulder of one rotating shaft segment 1041 and the large diameter wall of the stepped shaft outer ring wall. The corresponding side end of the electromagnetic suction cup 1022 is clamped in the clamping groove. This method can improve the stability and reliability of the installation of the electromagnetic suction cup 1022. In particular, when the electric control cable needs to enter the electromagnetic suction cup 1022 through the bracket rotating shaft 104, the above structure can ensure the alignment accuracy between the wiring hole on the annular bracket 1021 and the wiring channel in the electromagnetic suction cup 1022, thereby avoiding damage to the electric control cable and other faults.

[0108] In one embodiment, the electronic control module includes a central controller and conductive slip rings. Each of the electronic control cables is connected to the rotor portion of the conductive slip rings, and the central controller is connected to the stator portion of the conductive slip rings. The rotor portion of the conductive slip rings is preferably mounted on the bracket shaft 104. This structure ensures reliable control of the power supply and loss of each electromagnetic chuck 1022 while the electromagnetic chuck 1022 rotates normally.

[0109] The above-mentioned central controller includes but is not limited to a PLC controller.

[0110] When the annular bracket 1021 drives each electromagnetic suction cup 1022 to rotate, some electromagnetic suction cups 1022 are immersed in the filter tank 101 from outside the filter tank 101, and some electromagnetic suction cups 1022 leave the filter tank 101 and swing upward; for the electromagnetic suction cups 1022 that swing upward, ferromagnetic impurities are adsorbed on their surfaces, and the liquid that is carried up and the liquid in the adsorbed impurities can leave the electromagnetic suction cups 1022 under the action of gravity, so that the effect of gravity dehydration can be achieved. The impurities collected in the impurity collector 103 have a low water content, which not only facilitates the subsequent treatment of the impurities, but also reduces the loss of liquid in the filter tank 101.

[0111] In one embodiment, as shown in Figures 9 and 10, the filter disc 102 further includes a water retaining ring 1023, which is coaxially mounted on the support shaft 104 and abuts against the surface of each electromagnetic suction cup 1022. An annular water retaining edge is protruded from the outer ring wall of the water retaining ring 1023, and the annular water retaining edge and the electromagnetic suction cup 1022 form a water retaining groove. The provision of the water retaining ring 1023 can effectively guide the liquid, preventing it from entering places such as the support shaft 104 and affecting the normal operation of the electronic control unit.

[0112] Preferably, there are two water retaining rings 1023 and they are arranged on both sides of the annular bracket 1021.

[0113] Preferably, a sealing gasket can be sandwiched between the water retaining ring 1023 and the electromagnetic suction cup 1022 to improve the water retaining effect.

[0114] At the impurity collection station, impurities on the surface of the electromagnetic chuck 1022 may be scraped off, or the surface of the electromagnetic chuck 1022 may be flushed with high-pressure water or high-pressure gas.

[0115] In one embodiment, as shown in Figures 8-10 , the impurity removal unit includes a scraper 1031, the working end of which contacts the surface of the electromagnetic chuck 1022 in the impurity collection position; the impurity collector 103 also includes an impurity collection trough 1032, which is connected to the bottom of the scraper 1031. This method has low energy consumption and high working reliability.

[0116] Generally, both sides of the electromagnetic suction cup 1022 can absorb impurities. Therefore, it is preferred to set a scraper 1031 and an impurity collection groove 1032 on both sides of the annular bracket 1021 respectively; the distance between the working ends of the scrapers 1031 on both sides is preferably the same as the thickness of the electromagnetic suction cup 1022.

[0117] Preferably, as shown in FIG9 and FIG10 , the scraper blade 1031 is arranged at an angle to facilitate the scraped impurities to fall into the impurity collecting trough 1032 .

[0118] Optionally, the working end of the scraper 1031 is its top end, and the working end is preferably parallel to the horizontal plane, that is, the contact line between the scraper 1031 and the electromagnetic suction cup 1022 is parallel to the horizontal plane. This method can facilitate the arrangement of the scraper 1031, the impurity collection trough 1032, etc. and facilitate the collection of impurities.

[0119] Preferably, the scraper 1031 adopts a grooved plate, and the length direction of the scraper 1031 is defined as the direction from its working end to the impurity collection groove 1032. Wing plates are extended from the two lateral ends of the scraper 1031 to better restrain and guide the scraped impurities.

[0120] As a preferred embodiment of this invention, as shown in Figures 9 and 10, there are multiple groups of filter discs 102, and each of the annular brackets 1021 is sequentially mounted on the same bracket shaft 104, and the bracket shaft 104 is connected to the rotary drive mechanism 105. Providing multiple groups of filter discs 102 can improve the filtration efficiency and filtration effect.

[0121] As shown in FIG. 9 , two adjacent filter discs 102 may share a common impurity collection tank 1032 .

[0122] Preferably, as shown in FIG9 , a plurality of partitions are provided in the filter tank 101 , each partition dividing the filter tank 101 into a plurality of liquid storage tanks 1011 , preferably each liquid storage tank 1011 is respectively provided with a filter disc 102 ; wherein, the number of filter discs 102 and liquid storage tanks 1011 is preferably the same and they are arranged in one-to-one correspondence.

[0123] In one embodiment, upstream sewage can be allowed to enter each liquid storage tank 1011 at the same time.

[0124] In another embodiment, the liquid storage tanks 1011 can be connected in series, with upstream sewage first entering the first liquid storage tank 1011. The sewage then overflows between the upstream and downstream liquid storage tanks 1011. This allows for streamlined sewage treatment, enabling continuous treatment and ensuring treatment effectiveness and efficiency. As shown in Figure 9, in the first liquid storage tank 1011, the filter disc 102 is preferably positioned near the sewage inlet to immediately capture ferromagnetic impurities in the sewage and improve electromagnetic filtration effectiveness. In the tail liquid storage tank 1011, the filter disc 102 is preferably positioned near the filtrate outlet to improve the cleanliness of the discharged filtrate.

[0125] In particular, based on the segmented design of the bracket shaft 104, the installation and arrangement of each filter disc 102 can be facilitated; the number of filter discs 102 can be increased or decreased as needed, so the flexibility is very high; and it can facilitate equipment maintenance, for example, the filter disc 102 at the corresponding liquid storage tank 1011 can be disassembled and assembled without affecting the filtration process in other liquid storage tanks 1011.

[0126] The method of using the electromagnetic filter 100 includes:

[0127] The electromagnetic chucks 1022 are driven to rotate by the annular bracket 1021, so that the electromagnetic chucks 1022 can move cyclically between the working position, the dehydration position and the impurity removal position.

[0128] In the working position, the electromagnetic chuck 1022 is energized and at least partially immersed in the filter tank 101 to absorb ferromagnetic impurities in the filter tank 101;

[0129] In the dehydration position, the electromagnetic chuck 1022 remains energized;

[0130] In the impurity removal position, the electromagnetic chuck 1022 loses power, and the impurities are driven away from the electromagnetic chuck 1022 by the impurity removal unit and collected.

[0131] Embodiment 9:

[0132] The alkali solution circulation tank 11 in Example 7 is equipped with an iron sludge processing subsystem for online cleaning of iron sludge impurities in the alkali solution circulation tank 11, thereby improving the system's operational stability and reliability, as well as the cleaning quality of steel, and reducing downtime and frequency for desilting.

[0133] Preferably, the iron sludge processing subsystem is connected to the circulation area 111 .

[0134] As shown in Figures 11 and 12, the iron sludge processing subsystem includes an intermediate medium circulation mechanism and an iron sludge recovery mechanism. The intermediate medium circulation mechanism includes a plurality of intermediate media 330 capable of extracting iron sludge from the bottom of the alkali liquid circulation tank 11, and a medium conveying unit 331, a medium transfer unit 332 and a medium reflux unit 333 connected in sequence. The medium conveying unit 331 is connected to the intermediate medium outlet of the alkali liquid circulation tank 11, and the medium reflux unit 333 is connected to the intermediate medium inlet of the alkali liquid circulation tank 11; the iron sludge recovery mechanism includes a flushing unit arranged above the medium transfer unit 332 and an iron sludge collection box 321 arranged below the medium transfer unit 332.

[0135] In one embodiment, the intermediate medium 330 includes steel balls for entraining iron sludge, which facilitates the removal of iron sludge from the bottom of the container. Iron sludge at the bottom of the container is entrained by the cascading flow of steel balls and carried out of the alkali solution circulation tank 11 via the medium conveying unit 331. The surface roughness of the steel balls is designed to enhance the entrainment of iron sludge. In one embodiment, the surface roughness of the steel balls is Ra ≥ 0.8 μm, and more preferably, Ra ≤ 12 μm.

[0136] In one embodiment, as shown in FIG11 , a slope is provided at the bottom of the alkali solution circulation tank 11 , and the slope slopes from the intermediate medium inlet to the intermediate medium outlet, so as to facilitate the circulation of the intermediate medium 330 in the container. For example, the medium steel balls can rely on gravity to run from the intermediate medium inlet to the intermediate medium outlet, and the medium steel balls at a high position exert an extrusion and driving effect on the medium steel balls at a low position and the iron mud on the slope. Based on the circulation of the medium steel balls, the bottom of the container is always in motion, which can reduce the accumulation of iron mud, thereby saving the intervention of power equipment. At the same time, the design of the slope is also conducive to the deposition of iron mud at the intermediate medium outlet, thereby facilitating the intermediate medium 330 to bring the iron mud out.

[0137] In one embodiment, the medium conveying unit 331 adopts a screw pump or a screw conveyor. According to the relative position relationship between the intermediate medium outlet and the medium transfer unit 332, the screw pump or the screw conveyor can be arranged tilted or horizontally.

[0138] In one embodiment, as shown in FIG11 and FIG12 , the medium transfer unit 332 is a chain conveying unit, such as a chain plate conveyor or a drag chain conveyor. Accordingly, the medium transfer unit 332 includes an upper chain layer 3321 and a lower chain layer 3322 .

[0139] The gap between the chain plates of the chain conveying unit is smaller than the size of the intermediate medium 330 , for example, smaller than the diameter of the medium steel ball.

[0140] Among them, the medium conveying unit 331 is connected with the upper chain layer 3321. For example, the medium output port of the medium conveying unit 331 is located directly above the upper chain layer 3321, and the intermediate medium 330 can be conveyed to the upper chain layer 3321; optionally, a hopper is arranged above the upper chain layer 3321, and the intermediate medium 330 output by the medium conveying unit 331 is received by the hopper and transferred to the upper chain layer 3321, which can avoid the intermediate medium 330 from popping out of the upper chain layer 3321 due to excessive falling distance.

[0141] The medium return unit 333 is arranged at the outlet side of the chain conveyor unit. Optionally, the medium return unit 333 uses a conveyor roller to transport the cleaned intermediate medium 330 back to the alkali liquid circulation tank 11.

[0142] The flushing unit is used to flush the intermediate medium 330 on the medium transfer unit 332, thereby separating the iron sludge from the intermediate medium 330. In one embodiment, as shown in Figure 12, the flushing unit includes a flushing pipe 351. At least one set of spray structures can be arranged at the bottom of the flushing pipe 351. When there are multiple sets of spray structures, the spray structures are arranged sequentially along the conveying direction of the intermediate medium 330. Each set of spray structures includes at least one nozzle. When there are multiple nozzles in the spray structure, the nozzles in the spray structures are preferably arranged sequentially along the width direction of the medium transfer unit 332.

[0143] Furthermore, as shown in Figure 12, the flushing unit further includes a flushing liquid supply pipe 352, which is connected to the flushing pipe 351 and is used to supply flushing liquid. Preferably, surface water from the alkali liquid circulation tank 11 is used as the flushing liquid. Accordingly, the flushing liquid supply pipe 352 is connected to the upper portion of the alkali liquid circulation tank 11.

[0144] The flushing liquid can exit through both sides of the medium transfer unit 332, and / or, if the medium transfer unit 332 is a hollow conveying device, it can exit through the gaps between the chain plates of the chain conveyor unit. In one embodiment, as shown in Figures 11 and 13, the iron sludge recovery mechanism also includes a drainage unit 322, which is arranged between the upper chain layer 3321 and the lower chain layer 3322 of the medium transfer unit 332. The top inlet of the drainage unit 322 is located directly below the flushing unit, and the bottom outlet of the drainage unit 322 is located directly above the iron sludge collection box 321. Based on this design, the flushing liquid can be reliably drained into the iron sludge collection box 321, making the on-site environment cleaner. At the same time, it prevents flushing water carrying iron sludge from contaminating the lower chain layer 3322, thereby improving the operating reliability of the medium transfer unit 332 and reducing its maintenance frequency.

[0145] Preferably, as shown in Figures 11 and 13, the above-mentioned drainage unit 322 has an inverted Y-shaped structure, forming one drainage inlet pipe and two drainage outlet pipes; the two drainage outlet pipes can ensure the drainage efficiency and effect of the flushing fluid on the one hand, and on the other hand, it is also convenient for the arrangement of the lower chain layer 3322, for example, the lower chain layer 3322 is located between the two drainage outlet pipes.

[0146] The upper chain layer 3321 may be arranged in the drainage inlet pipe, so as to better capture the intermediate medium 330 and iron mud splashed by the high-pressure jet.

[0147] Preferably, as shown in Figures 11 and 13, the above-mentioned drainage unit 322 is connected to the iron mud collection box 321 to form an integrated structure. For example, for the above-mentioned inverted Y-shaped drainage unit 322, its outer frame 3221 is integrally formed with the iron mud collection box 321 to form a top-closed box body, and an inverted V-shaped mudguard 3222 is arranged in the box body, which correspondingly constitutes the inner frame of the drainage unit 322.

[0148] In one embodiment, a protective net 323 is further arranged around the upper chain layer 3321 of the medium transfer unit 332. The protective area of ​​the protective net 323 at least covers the flushing area of ​​the upper chain layer 3321. The provision of the protective net 323 can prevent the high-pressure jet from spraying the intermediate medium 330 out of the medium transfer unit 332.

[0149] Among them, the protective net 323 can provide side protection. Optionally, the protective net 323 includes two side mesh panels 3231, and the two side mesh panels 3231 are arranged on both sides of the conveying channel of the medium transfer unit 332; the side mesh panels 3231 preferably do not move together with the medium transfer unit 332, for example, they are installed through mesh panel brackets. For the above-mentioned solution with a drainage unit 322, the side mesh panels 3231 can also be installed on the outer frame 3221 of the drainage unit 322.

[0150] And / or, the protective net 323 can provide upper protection. Optionally, the protective net 323 includes a top mesh panel 3232, which is installed above the medium transfer unit 332; the top mesh panel 3232 preferably does not move with the medium transfer unit 332, and its installation method can refer to the installation method of the side mesh panel 3231.

[0151] The iron sludge processing subsystem is further optimized. As shown in FIG11 and FIG12 , the iron sludge recovery mechanism further includes a filtering unit, and the iron sludge collection box 321 is provided with a flushing liquid recovery pipe connected to the filtering unit.

[0152] Optionally, the filtrate produced by the filtration unit can be reused as a flushing liquid. For example, the filtrate outlet pipe of the filtration unit is connected to a flushing liquid storage tank, and the flushing liquid supply pipe 352 is also connected to the flushing liquid storage tank. When the flushing liquid is surface water from the alkali liquid circulation tank 11, the filtrate produced by the filtration unit can be returned to the alkali liquid circulation tank 11. Accordingly, the filtrate outlet pipe of the filtration unit is connected to the alkali liquid circulation tank 11.

[0153] The iron sludge collection box 321 can control the direction of the flushing liquid by overflowing, and the flushing liquid recovery pipe is connected to the overflow level of the iron sludge collection box 321. Heavier impurities are deposited at the bottom of the iron sludge collection box 321 and can be cleaned regularly or irregularly.

[0154] In one embodiment, the filtering unit includes an electromagnetic filtering device for removing ferromagnetic impurities in the flushing liquid, which can reliably adsorb and remove ferromagnetic impurities suspended in the flushing liquid; the electromagnetic filtering device preferably adopts the electromagnetic filter 100 provided in the above embodiment 3.

[0155] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A remote maintenance-free mechanical defoaming device, comprising a housing, a defoaming impeller for eliminating foam, and a motor for driving the defoaming impeller to rotate, wherein the defoaming impeller is arranged in the housing, and the housing has a suction section for allowing foam to enter the housing, characterized in that: It also includes an impeller connecting shaft, the defoaming impeller is arranged on the impeller connecting shaft, the impeller connecting shaft is coaxially connected to the motor shaft of the motor through a coaxial sealing assembly, and a maintenance-free sealing assembly is also provided on the side of the coaxial sealing assembly close to the suction section.

2. The remote maintenance-free mechanical defoaming device according to claim 1, characterized in that: The coaxial sealing assembly comprises a coupling, and the impeller connecting shaft and the motor shaft are coaxially connected via the coupling.

3. The remote maintenance-free mechanical defoaming device according to claim 2, characterized in that: The coaxial seal assembly further comprises bearings for supporting the motor shaft and the impeller connecting shaft.

4. The remote maintenance-free mechanical defoaming device according to claim 3, characterized in that: The coaxial seal assembly further comprises a bearing cover for fixing the axial position of the bearing, wherein the bearing cover is located between the coupling and the bearing.

5. The remote maintenance-free mechanical defoaming device according to claim 1, characterized in that: A bearing sealing box is arranged outside the impeller connecting shaft.

6. The remote maintenance-free mechanical defoaming device according to claim 1, characterized in that: The maintenance-free sealing assembly comprises a dynamic and static ring and a gravity block which can drive the dynamic and static ring to be close to the motor shaft when stationary.

7. The remote maintenance-free mechanical defoaming device according to claim 6, characterized in that: It also includes an auxiliary impeller which can generate pressure in the opposite direction to the defoaming impeller, and the auxiliary impeller is installed on the motor shaft.

8. The remote maintenance-free mechanical defoaming device according to claim 1, characterized in that: A sliding bearing is arranged at one end of the impeller connecting shaft away from the motor.

9. A lye circulation tank, characterized in that: It comprises a remote maintenance-free mechanical defoaming device as described in any one of claims 1 to 8.

10. A degreasing system, characterized in that: It comprises a remote maintenance-free mechanical defoaming device as described in any one of claims 1 to 8.

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