A multi-stage filtering device for sulfuric acid production

Abstract

This utility model relates to a multi-stage filtration device for sulfuric acid production, applied in the field of sulfuric acid production filtration technology. It enables the injection of liquid sulfuric acid into a filter tank through an inlet, where it undergoes initial filtration through an inner filter screen. The filtered sulfuric acid then passes through an outer filter screen for secondary filtration. Simultaneously, a controller activates a servo motor to drive a second rotating shaft, which in turn rotates a connecting plate on the first rotating shaft. This indirectly rotates a clamping block, scraping the inner walls of the inner and outer filter screens to remove impurities clogging them. During this process, an electric slide rail drives a sliding plate to move a beater bar horizontally back and forth, striking the outer walls of the inner and outer filter screens. This vibrates down impurities on the screens, increasing the cleaning force. By using multiple layers of filter screens for multi-stage filtration of sulfuric acid, the filtration effect is enhanced. The addition of a scraper and beater bar further cleans impurities from the filter screens.

Description

Technical Field

[0001] This utility model relates to a filtration device, and more particularly to a multi-stage filtration device for sulfuric acid production applied in the field of sulfuric acid production filtration technology. Background Technology

[0002] Sulfuric acid is an important industrial raw material that can be used to manufacture fertilizers, pharmaceuticals, explosives, nitrocellulose, pigments, detergents, sulfonating agents, and storage batteries. It is also widely used in industries such as petroleum purification, metal smelting, and dyeing. The production of sulfuric acid is a process of converting sulfur or sulfur-containing ores into sulfuric acid through a chemical reaction. After the sulfuric acid production is completed, a filter is needed to remove impurities contained in the sulfuric acid.

[0003] Chinese patent CN212067986U discloses a dilute sulfuric acid filtration device, which includes a top coating tank, a first filter tank, a second filter tank, a third filter tank, a buffer tank, and a compressed air tank. This utility model has a simple structure, is easy to operate, and can perform circulating filtration of dilute sulfuric acid.

[0004] In the existing technology, concentrated sulfuric acid produced is generally filtered using a leaf filter. However, leaf filters typically only have one type of filter cloth with the same pore size. When larger impurities adhere to the filter cloth, the filtration resistance increases, resulting in poor filtration efficiency. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the concentrated sulfuric acid produced is generally filtered by a leaf filter. However, the leaf filter is generally equipped with only one type of filter cloth with the same pore size. When larger impurities adhere to the filter cloth, the filtration resistance increases and the filtration effect is poor.

[0006] To address the aforementioned problems, this utility model provides a multi-stage filtration device for sulfuric acid production, comprising a base frame, a filter barrel fixedly connected to the top of the base frame, a sealing cap with a liquid injection port installed at the top of the filter barrel, an inner filter screen installed inside the filter barrel, an outer filter screen covering the inner filter screen, a second rotating shaft rotatably connected to the bottom wall of the filter barrel located inside the inner filter screen, a support plate fixedly connected to the bottom of the base frame, a servo motor fixedly connected to the top of the support plate, and the output end of the servo motor connected to the second rotating shaft, a first rotating shaft detachably connected to the top of the second rotating shaft, a connecting plate fixedly connected to the side wall of the first rotating shaft, scrapers respectively located inside the outer filter screen and the inner filter screen detachably connected to the connecting plate, and the scrapers respectively adhering to the inner walls of the outer filter screen and the inner filter screen, an electric slide rail fixedly connected to the side end of the connecting plate, a sliding plate slidably connected to the electric slide rail, and a detachably connected flap rod adhering to the outer walls of the outer filter screen and the inner filter screen respectively.

[0007] In the above-mentioned filtration device, sulfuric acid is filtered in multiple layers by setting up multiple filter screens (inner filter screen and outer filter screen), which can enhance the filtration effect. At the same time, scraper and beater are set up to clean impurities on the filter screen and prevent the filter screen from clogging.

[0008] As a further improvement of this application, a slot is provided at the top of the second rotating shaft, and a block is fixedly connected to the bottom of the first rotating shaft, with the slot and the block engaging. The first rotating shaft is rotatably connected to the bottom of the sealing cover.

[0009] As a further improvement to this application, two screw holes are provided on the connecting plate, and a screw rod is threadedly connected to the screw hole through a nut, and the scraper is fixedly connected to the screw rod.

[0010] As a further improvement of this application, two limiting grooves are provided on the side of the skateboard, and the racket arm is installed by engaging the limiting grooves with the limiting block.

[0011] As another improvement of this application, the structures inside the filter barrel are all made of highly corrosion-resistant materials.

[0012] As a further improvement to this application, the inner diameter of the filter holes on the inner filter screen is larger than the inner diameter of the filter holes on the outer filter screen.

[0013] As a further improvement to this application, a controller for controlling the servo motor and the electric slide rail is fixedly connected to the base frame.

[0014] In summary, sulfuric acid liquid is injected into the filter tank through the injection port and enters the inner filter screen for initial filtration. The filtered sulfuric acid then undergoes secondary filtration through the outer filter screen. Simultaneously, the controller activates the servo motor to drive the second rotating shaft, which in turn rotates the connecting plate on the first rotating shaft. This indirectly causes the clamping block to rotate, scraping the inner walls of the inner and outer filter screens and removing impurities that clog their inner walls. During this process, the electric slide rail is simultaneously activated, driving the sliding plate to move the batter horizontally back and forth, thereby striking the outer walls of the inner and outer filter screens and vibrating down the impurities on them, thus enhancing the cleaning effect. Attached Figure Description

[0015] Figure 1 This is an isometric view of the sulfuric acid filtration device according to the first embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the internal structure of the filtration device according to the first embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the cleaning mechanism installation structure according to the first embodiment of this application;

[0018] Figure 4 This is a schematic diagram of the inner and outer filter screens according to the first embodiment of this application;

[0019] Figure 5 This is a schematic diagram of the scraper and the handle mounting structure according to the second embodiment of this application;

[0020] Figure 6 For this application Figure 5 Enlarged view of point A in the middle.

[0021] Explanation of the labels in the diagram:

[0022] 1. Base frame; 2. Filter barrel; 3. Support plate; 4. Servo motor; 5. Sealing cover; 6. First rotating shaft; 7. Inner filter screen; 8. Outer filter screen; 9. Connecting plate; 10. Screw; 11. Slide plate; 12. Patting rod; 13. Nut; 14. Second rotating shaft; 15. Slot; 16. Locking block; 17. Screw hole; 18. Electric slide rail; 19. Scraper; 20. Liquid injection port. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figures 1-4 A multi-stage filtration device for sulfuric acid production is shown, comprising a base frame 1, a filter barrel 2 fixedly connected to the top of the base frame 1, a sealing cap 5 with a liquid injection port 20 installed at the top of the filter barrel 2, an inner filter screen 7 installed inside the filter barrel 2, an outer filter screen 8 covering the inner filter screen 7, a second rotating shaft 14 rotatably connected to the bottom wall of the filter barrel 2 within the inner filter screen 7, a support plate 3 fixedly connected to the bottom of the base frame 1, a servo motor 4 fixedly connected to the top of the support plate 3, and the output end of the servo motor 4 connected to the second rotating shaft 14. The top of the shaft 14 is detachably connected to a first rotating shaft 6. A connecting plate 9 is fixedly connected to the side wall of the first rotating shaft 6. Scrapers 19 located inside the outer filter screen 8 and the inner filter screen 7 are detachably connected to the connecting plate 9. The scrapers 19 are respectively attached to the inner wall of the outer filter screen 8 and the inner wall of the inner filter screen 7. An electric slide rail 18 is fixedly connected to the side end of the connecting plate 9. A slide plate 11 is slidably connected to the electric slide rail 18. A tack rod 12 that is attached to the outer wall of the outer filter screen 8 and the inner filter screen 7 is detachably connected to the side end of the slide plate 11.

[0026] The structures inside the filter barrel 2 are all made of highly corrosion-resistant materials. The inner diameter of the filter holes on the inner filter screen 7 is larger than that on the outer filter screen 8. A controller for controlling the servo motor 4 and the electric slide rail 18 is fixedly connected to the base frame 1.

[0027] Working principle: Liquid sulfuric acid is injected into the filter tank 2 through the injection port 20 and enters the inner filter screen 7 for initial filtration. The filtered sulfuric acid then passes through the outer filter screen 8 for secondary filtration. At the same time, the controller activates the servo motor 4 to drive the second rotating shaft 14 to rotate the connecting plate 9 on the first rotating shaft 6, thereby indirectly driving the clamping block 16 to rotate and scrape the inner walls of the inner filter screen 7 and the outer filter screen 8, cleaning the impurities clogging the inner walls of the inner filter screen 7 and the outer filter screen 8. During this period, the electric slide rail 18 is activated simultaneously to drive the sliding plate 11 to drive the beater 12 to move horizontally back and forth, thereby striking the outer walls of the inner filter screen 7 and the outer filter screen 8, which can vibrate down the impurities on the inner filter screen 7 and the outer filter screen 8, thereby enhancing the cleaning effect.

[0028] This invention uses an inner filter 7 and an outer filter 8 to filter sulfuric acid in multiple layers, which can enhance the filtration effect. At the same time, a scraper 19 and a beater 12 are provided to clean impurities on the filter screen and prevent the filter screen from clogging.

[0029] Second implementation method:

[0030] Figures 5-6 The second rotating shaft 14 has a slot 15 at its top end. The first rotating shaft 6 is fixedly connected to a block 16 at its bottom end, and the slot 15 engages with the block 16. The first rotating shaft 6 is rotatably connected to the bottom end of the sealing cover 5. The connecting plate 9 has two screw holes 17. The screw holes 17 are threadedly connected to the screw rod 10 through the nut 13. The scraper 19 is fixedly connected to the screw rod 10. The side end of the slide plate 11 has two limiting grooves. The clapper 12 is installed by engaging the limiting block with the limiting groove.

[0031] Working principle: Even though the cleaning structure inside the filter bucket 2 is made of highly corrosion-resistant materials, it is inevitable that it will be damaged after being soaked in sulfuric acid for a long time. At this time, the sealing cover 5 can be opened and the first rotating shaft 6 can be pulled out from the slot 15 to remove it from the filter bucket 2. Then, the nut 13 can be turned to remove the scraper 19 on the screw 10 from the connecting plate 9 for replacement. Similarly, the tweezers 12 can be pulled out from the limiting slot for replacement. The cleaning tools can be quickly and conveniently disassembled and replaced.

[0032] By designing the filter's cleaning structure for easy disassembly and assembly, convenient replacement can be achieved.

[0033] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A multi-stage filtration device for sulfuric acid production, comprising a base frame (1), characterized in that: A filter bucket (2) is fixedly connected to the top of the base frame (1). A sealing cap (5) with a liquid injection port (20) is installed on the top of the filter bucket (2). An inner filter screen (7) is installed inside the filter bucket (2). An outer filter screen (8) is provided on the outer sleeve of the inner filter screen (7). A second rotating shaft (14) is rotatably connected to the bottom wall of the filter bucket (2) inside the inner filter screen (7). A support plate (3) is fixedly connected to the bottom of the base frame (1). A servo motor (4) is fixedly connected to the top of the support plate (3). The output end of the servo motor (4) is connected to the second rotating shaft (14). The top of the second rotating shaft (14) is detachable. A first rotating shaft (6) is detachably connected to the first rotating shaft (6), and a connecting plate (9) is fixedly connected to the side wall of the first rotating shaft (6). A scraper (19) located inside the outer filter screen (8) and the inner filter screen (7) is detachably connected to the connecting plate (9), and the scraper (19) is in contact with the inner wall of the outer filter screen (8) and the inner wall of the inner filter screen (7) respectively. An electric slide rail (18) is fixedly connected to the side end of the connecting plate (9), and a sliding plate (11) is slidably connected to the electric slide rail (18). A flap (12) is detachably connected to the side end of the sliding plate (11) and is in contact with the outer wall of the outer filter screen (8) and the inner filter screen (7) respectively.

2. The multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The second rotating shaft (14) has a slot (15) at its top end, and the first rotating shaft (6) has a fixed block (16) at its bottom end, and the slot (15) and the block (16) engage with each other. The first rotating shaft (6) is rotatably connected to the bottom end of the sealing cover (5).

3. The multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The connecting plate (9) has two screw holes (17), and a screw rod (10) is threadedly connected to the screw hole (17) through a nut (13), and the scraper (19) is fixedly connected to the screw rod (10).

4. A multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The slide plate (11) has two limiting grooves on its side, and the lever (12) is installed by locking the limiting block with the limiting groove.

5. A multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The structures located inside the filter barrel (2) are all made of highly corrosion-resistant materials.

6. A multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The inner diameter of the filter holes on the inner filter screen (7) is larger than the inner diameter of the filter holes on the outer filter screen (8).

7. A multi-stage filtration device for sulfuric acid production according to claim 1, characterized in that: The base frame (1) is fixedly connected to a controller that controls the servo motor (4) and the electric slide rail (18).

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