Defoaming device of magnetic filtration system

Abstract

The utility model discloses a defoaming device of a magnetic filtration system, which comprises a tubular spray beam, a plurality of nozzles, a water pipe, a manual water valve, a water flow regulating valve and a foam liquid level detector, the spray beam is fixed above a magnetic filtration roller, one end of the spray beam is sealed by a screwed plug, the other end of the spray beam is connected with an outlet end of the water pipe, and the nozzles are arranged along the spray beam. Each nozzle is installed on the spraying beam and is opposite to the magnetic filtering roller, the inlet end of the water pipe is connected with a desalted water pipeline, the manual water valve and the water flow regulating valve are installed on the water pipe, and the foam liquid level detector is installed on a circulating box of the magnetic filtering system. And a signal output end of the foam liquid level detector is connected with a controller of the water flow regulating valve. The spray nozzle is used for spraying water mist to the magnetic filtering roller, alkali liquor foam is eliminated through the water mist, the situation that a large amount of foam is accumulated and then scattered on the ground of a cleaning section is avoided, alkali liquor foam generated by a magnetic filtering system can be effectively restrained, consumption of alkali liquor is reduced, and environmental pollution is eliminated.

Description

Technical Field

[0001] This utility model relates to a device used in the magnetic filtration system of a cold rolling mill galvanizing line, which can eliminate alkaline foam generated at the magnetic filter roller, and belongs to the technical field of cold rolling equipment. Background Technology

[0002] Magnetic filtration systems are indispensable equipment in the cleaning section of galvanizing lines in cold rolling mills. They consist of a circulation tank, magnetic filter rollers, and piping. Using alkaline solution stored in the circulation tank as the magnetic filter medium, the solution is sprayed to clean the strip and then flows back to the circulation tank through the pipes. After filtration, it is reused. The magnetic filter rollers are installed at the front end of the circulation tank to adsorb impurities in the alkaline solution. Due to the unique properties of alkaline solution, a large amount of foam is generated at the magnetic filter rollers when it flows back into the filter tank. When the foam accumulates to a certain extent, it spills onto the floor of the cleaning section, increasing alkaline solution consumption and causing serious environmental pollution. Therefore, designing a device to effectively suppress alkaline foam is essential. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a defoaming device for a magnetic filtration system, which effectively suppresses alkaline foam generated by the magnetic filtration system, reduces the consumption of alkaline solution, and eliminates environmental pollution.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A defoaming device for a magnetic filtration system includes a tubular spray beam, nozzles, a water pipe, a manual water valve, a water flow regulating valve, and a foam level detector. The spray beam is fixed above the magnetic filter roller of the magnetic filtration system. One end of the spray beam is sealed with a threaded plug, and the other end is connected to the outlet end of the water pipe. Multiple nozzles are arranged along the spray beam, and each nozzle is installed on the spray beam by its own thread and is opposite to the magnetic filter roller. The inlet end of the water pipe is connected to a demineralized water pipeline. The manual water valve and the water flow regulating valve are installed on the water pipe. The foam level detector is installed on the circulation tank of the magnetic filtration system, and the signal output end of the foam level detector is connected to the controller of the water flow regulating valve.

[0006] The defoaming device of the above-mentioned magnetic filtration system also includes an air pipe, a manual air valve, and an air flow regulating valve. The inlet end of the air pipe is connected to compressed air, and the outlet end is connected to the connection end of the spray beam and the water pipe. The manual air valve and the air flow regulating valve are installed on the air pipe, and the control end of the air flow regulating valve is connected to the controller of the water flow regulating valve.

[0007] The defoaming device of the aforementioned magnetic filtration system includes a demineralized water check valve installed on the water pipe and a pneumatic check valve installed on the air pipe.

[0008] The defoaming device of the aforementioned magnetic filtration system has a pressure regulating valve installed on the air pipe.

[0009] The defoaming device of the aforementioned magnetic filtration system has a water baffle plate installed at the end of the spray beam near the water pipe and air pipe.

[0010] In the defoaming device of the aforementioned magnetic filtration system, the nozzle's spray port faces downward and is inclined towards the inside of the circulation tank, with the angle α between the nozzle's axis and the vertical line being 30°.

[0011] In the defoaming device of the aforementioned magnetic filtration system, the nozzle has an elongated spray opening, and the angle β between the length direction of the spray opening and the axis of the spray beam is 15°.

[0012] This invention utilizes nozzles to spray water mist onto the magnetic filter roller, thereby eliminating alkaline foam and preventing it from accumulating and spilling onto the ground in the cleaning section. While ensuring stable production operation, it can effectively suppress alkaline foam generated by the magnetic filtration system, reduce the consumption of alkaline solution, and eliminate environmental pollution. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the spray beam installation;

[0016] Figure 3 This is a schematic diagram of nozzle installation.

[0017] Figure 4 This is a schematic diagram of nozzle spraying.

[0018] The following are the labels in the diagram: 1. Spray beam, 2. Nozzle, 3. Plug, 4. Pipe clamp, 5. Bolt, 6. Water baffle, 7. Water pipe, 8. Air pipe, 9. T-joint, 10. Demineralized water check valve, 11. Manual water valve, 12. Pneumatic check valve, 13. Manual air valve, 14. Pressure regulating valve, 15. Air flow regulating valve, 16. Water flow regulating valve, 17. Foam level detector. Detailed Implementation

[0019] This invention provides a defoaming device for a magnetic filtration system. The device sprays water mist generated by combining a demineralized water system and a pneumatic system onto the magnetic filter roller. The water mist eliminates alkaline foam, preventing the foam from accumulating and falling onto the ground of the cleaning section, ensuring stable production, and eliminating environmental pollution. The device has a simple structure, low cost, and reliable operation, resulting in significant economic benefits and effectively solving the problems existing in the background technology.

[0020] See Figures 1-4This utility model mainly includes a spray beam 1, nozzles 2, plugs 3, pipe clamps 4, bolts 5, a baffle plate 6, a water pipe 7, an air pipe 8, a tee 9, a demineralized water check valve 10, a manual water valve 11, a pneumatic check valve 12, a manual air valve 13, a pressure regulating valve 14, an air flow regulating valve 15, a water flow regulating valve 16, and a foam level detector 17. The spray beam 1 is tubular and located above the magnetic filter roller. Straight pipe sections are provided at both ends, and it is fixedly connected to the circulation box of the magnetic filtration system via pipe clamps 4 and bolts 5. One end of the spray beam 1 is sealed by a plug 3 to facilitate cleaning of the inside of the spray beam 1. The other end of the spray beam 1 is connected to the outlet ends of the water pipe 7 and the air pipe 8 via a tee 9. Multiple nozzles 2 are arranged along the spray beam 1 at certain intervals. Each nozzle 2 is installed on the spray beam 1 by its own thread. The spray nozzle 2's spray port faces downwards and is inclined towards the inside of the circulation box. The angle α between the axis of the nozzle 2 and the vertical line is 30° (e.g., ...). Figure 2 As shown), the nozzle 2 has an elongated spray opening, and the angle β between the length direction of the spray opening and the axis of the spray beam 1 is 15° (as shown). Figure 3 , Figure 4 As shown, a baffle plate 6 is installed at one end of the spray beam 1 near the water pipe 7 and the air pipe 8 to prevent water on the spray beam 1 from flowing onto the water pipe 7 and the air pipe 8. The inlet end of the water pipe 7 is connected to the demineralized water pipeline. A demineralized water check valve 10, a manual water valve 11, and a water flow regulating valve 16 are installed on the water pipe 7, with the water flow regulating valve 16 located at the inlet end of the water pipe 7. The function of the demineralized water check valve 10 is to prevent liquid backflow. The inlet end of the air pipe 8 is connected to compressed air (or other high-pressure air source). A pneumatic check valve 12, a manual air valve 13, a pressure regulating valve 14, and an air flow regulating valve 15 are installed on the air pipe 8. The function of the pneumatic check valve 12 is to ensure that the liquid in the water pipe 7 does not flow back into the air pipe 8.

[0021] The foam level detector 17 is installed on the body of the circulation tank to detect the height of the foam. The signal output terminal of the foam level detector 17 is connected to the controller of the water flow regulating valve 16. The controller of the water flow regulating valve 16 is also the controller of the air flow regulating valve 15. The controller is a PLC.

[0022] The working process of this utility model is as follows: The alkaline solution recovered by the magnetic filtration system reaches the circulation tank through pipelines. The foam level detector 17 detects the foam height in real time. When the foam height reaches the set value, the water flow regulating valve 16 opens, and the demineralized water in the water pipe 7 enters the spray beam 1, then forms a water mist from the nozzle 2 for defoaming. When the amount of foam is large and the defoaming effect of the water mist is insufficient, the air flow regulating valve 15 opens, and compressed air in the air pipe 8 enters the spray beam 1, increasing the pressure inside the spray beam 1 and increasing the water mist spraying speed. That is, when there is little foam, demineralized water is used alone for defoaming, and when there is a lot of foam, demineralized water and compressed air are used together for defoaming.

[0023] The concentration of alkali solution can also be detected by the alkali solution concentration detector in the circulation tank. When the concentration of alkali solution is high, the opening of the water flow regulating valve 16 is increased and the opening of the gas flow regulating valve 15 is decreased. When the concentration of alkali solution is low, the opening of the water flow regulating valve 16 is minimized and the opening of the gas flow regulating valve 15 is increased.

[0024] This invention utilizes water mist defoaming and simultaneously uses compressed air to regulate the water mist spray pressure. The pressure and flow rate of compressed air and demineralized water can be manually adjusted, or automatically adjusted according to the amount of foam and the concentration of alkali solution. This effectively eliminates foam overflow in the magnetic filtration system, ensuring stable production operation and a clean production environment.

Claims

1. A defoaming device for a magnetic filtration system, characterized in that, The system includes a tubular spray beam (1), nozzles (2), a water pipe (7), a manual water valve (11), a water flow regulating valve (16), and a foam level detector (17). The spray beam (1) is fixed above the magnetic filter roller of the magnetic filtration system. One end of the spray beam (1) is sealed by a plug (3), and the other end is connected to the outlet end of the water pipe (7). Multiple nozzles (2) are arranged along the spray beam (1). Each nozzle (2) is installed on the spray beam (1) by its own thread and is opposite to the magnetic filter roller. The inlet end of the water pipe (7) is connected to the demineralized water pipeline. The manual water valve (11) and the water flow regulating valve (16) are installed on the water pipe (7). The foam level detector (17) is installed on the circulation box of the magnetic filtration system. The signal output end of the foam level detector (17) is connected to the controller of the water flow regulating valve (16).

2. A defoaming device for a magnetic filtration system according to claim 1, characterized in that It also includes an air pipe (8), a manual air valve (13) and an air flow regulating valve (15). The inlet end of the air pipe (8) is connected to compressed air, and the outlet end is connected to the connection end of the spray beam (1) and the water pipe (7). The manual air valve (13) and the air flow regulating valve (15) are installed on the air pipe (8). The control end of the air flow regulating valve (15) is connected to the controller of the water flow regulating valve (16).

3. A defoaming device for a magnetic filtration system according to claim 2, characterized in that A desalination check valve (10) is installed on the water pipe (7), and a pneumatic check valve (12) is installed on the air pipe (8).

4. The defoaming device of a magnetic filtration system according to claim 2, characterized in that, A pressure regulating valve (14) is installed on the air pipe (8).

5. The defoaming device of a magnetic filtration system according to claim 2, characterized in that, A water baffle (6) is installed at one end of the spray beam (1) near the water pipe (7) and the air pipe (8).

6. The defoaming device of a magnetic filtration system according to claim 1, characterized in that, The nozzle (2) has its spray port facing downwards and tilted towards the inside of the circulation tank. The angle α between the axis of the nozzle (2) and the vertical line is 30°.

7. The defoaming device of a magnetic filtration system according to claim 1, characterized in that, The nozzle (2) has a long strip-shaped spray opening, and the angle β between the length direction of the spray opening and the axis of the spray beam (1) is 15°.

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