Bag-type iron removal filter

Abstract

A bag filter for removing iron includes a tank, a perforated bag plate, several filter bag assemblies, a tank cover, a guide pipe, and a first iron removal assembly. The guide pipe extends vertically through the perforated bag plate, maintaining a sealed connection, and its lower end is connected to the feed pipe on the tank. The first iron removal assembly extends from top to bottom through the tank cover and into the guide pipe. Using this design, most magnetic ferrous materials are removed when material flows in through the feed pipe. Its advantages include the addition of iron removal filtration to the existing bag filter, improving filtration performance and integrating the bag filter and iron removal filter into a single, compact structure with a small footprint. Furthermore, the first iron removal assembly can be removed directly without opening the tank cover for cleaning and replacement, reducing operation time and minimizing the impact of cleaning and replacing the iron removal assembly on production line efficiency.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and specifically to a bag filter for removing iron. Background Technology

[0002] Bag filters, as a highly efficient solid-liquid separation device, are widely used in various industrial fields such as water treatment due to their advantages of wide filtration accuracy range, large processing capacity, and simple operation and maintenance. During filtration, liquid material is injected into the filter container through the inlet and then enters each filter bag. As the pressure increases, clean liquid can permeate through the filter bags, while particulate impurities are trapped inside, thus achieving filtration. When a large amount of particulate impurities remain in the filter bags, simply replace the filter bags to continue use. Bag filters have advantages such as large processing capacity, small size, large dirt holding capacity, high operating pressure, low pressure loss, low operating costs, and significant energy-saving effects, therefore, they have a wide range of applications.

[0003] The function of a demagnetizing filter is to filter out magnetic ferrous substances in slurry. Existing magnetic rod filters typically include a cylinder with multiple magnetic rods arranged in parallel inside. When the material passes through the cylinder, its magnetic ferrous substances are attracted away by the magnetic rods, thereby achieving demagnetizing filtration.

[0004] Currently, for filtration applications with a high concentration of magnetic ferromagnetic substances, two sets of filters are typically used: a demagnetizing filter and a bag filter connected in series. During filtration, the material first passes through the demagnetizing filter to remove most of the magnetic ferromagnetic substances, and then passes through the bag filter for further filtration of non-ferromagnetic particles. However, setting up two sets of filters is not only costly but also takes up a lot of space.

[0005] For example, Chinese invention patent application CN 104645689 A discloses a multi-bag filter device, which has an inner frame in the filter bag and a magnetic rod inside the inner frame. In this way, particulate impurities can be filtered through the filter bag, and magnetic iron substances can be adsorbed by the magnetic rod.

[0006] However, in filtration conditions with a high content of magnetic ferrous materials, the surface of the magnetic rod will quickly adsorb a large amount of magnetic ferrous materials, thus requiring frequent cleaning / replacement. The aforementioned multi-bag filter device places the magnetic rod inside the filter bag, which can make the structure more compact and reduce the floor space. However, when replacing the magnetic rod, it is often necessary to open the filter cover for cleaning and replacement, which is very inconvenient, time-consuming and labor-intensive. Moreover, the frequency of cleaning and replacing the magnetic rod is significantly higher than the frequency of replacing the filter bag. Such a setup will greatly affect the production line efficiency. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a bag-type iron removal filter.

[0008] The technical solution adopted in this invention is: a bag-type iron removal filter, comprising: The tank has an opening at the top, a feed pipe on its side wall, and a discharge hole at the bottom. A bag-type perforated plate is fixedly installed on the upper end of the tank body, and the bag-type perforated plate has a plurality of filter bag mounting holes; Several filter bag assemblies are fixedly installed on filter bag mounting holes on a bag-type tube sheet; The can lid is sealed to the upper part of the can body; A guide pipe is installed through the bag-type tube sheet from top to bottom. The guide pipe is sealed and fixed to the bag-type tube sheet, and its lower end is connected to the feed pipe. The first iron removal component passes through the tank cover from top to bottom and extends into the guide pipe.

[0009] The can lid has a mounting base corresponding to the guide pipe; The first iron removal assembly includes: A sealing cap that is sealed to the mounting base; Several first magnets are fixedly connected to the bottom of the sealing cover; The handle is fixedly mounted on the upper end face of the sealing cover.

[0010] During filtration, after the material enters through the feed pipe, it first passes through the guide pipe. As the material passes through the guide pipe, a large amount of its magnetic ferrous material is attracted away by the first iron removal component inside the guide pipe. The material passing through the guide pipe will gather in the cavity on the upper side of the bag plate and flow into the filter bag assembly through the filter bag installation hole. Then, it will be separated and filtered by the filter bag assembly. The filtered clean material will flow out through the discharge hole at the bottom of the tank, while particulate impurities will be trapped inside the filter bag assembly.

[0011] Preferably, the filter bag assembly is provided with a second iron removal component inside.

[0012] The filter bag assembly includes: The support basket is fixedly connected at its upper end to the filter bag mounting hole; The filter bag is placed inside the support basket. The second iron removal assembly includes: The support frame is placed inside the filter bag; Several second magnets are evenly arranged on the support frame.

[0013] During filtration, when the filter bag is full of material, the second iron removal component will further adsorb the small amount of magnetic iron remaining in the filter bag to further ensure the iron removal filtration effect.

[0014] Furthermore, the support frame includes: Multiple support rings are arranged at intervals in the vertical direction, and the multiple support rings are connected into an integral structure by multiple U-shaped connecting ribs. A handle is provided on the support ring at the top. Multiple positioning units are fixedly installed inside the support ring, and each positioning unit includes multiple positioning rings for positioning and installing the second magnet.

[0015] The support frame provides overall support and is composed of only multiple support rings connected by several U-shaped connecting ribs. This simple structure allows it to work in conjunction with the filter bag's support basket, ensuring stable installation. The handle facilitates easy assembly and disassembly of the support frame. The positioning unit is used for positioning and installing the second magnet, using multiple concentric positioning rings to ensure stable installation.

[0016] Preferably, a flow guiding layer is formed on the outer side of the tank body, the discharge hole is connected to the flow guiding layer, and a discharge pipe is also connected to the flow guiding layer, with the discharge pipe located near the top of the tank body; a drain outlet is also provided at the bottom of the flow guiding layer.

[0017] The filtered material does not flow directly out through the discharge hole, but further passes through the guide jacket and then through the discharge pipe at the top of the guide jacket. Setting the discharge pipe at a high position makes it easier to install and connect the filter and the pipe. At the same time, it can further play a settling role, allowing small particles of impurities that are not completely filtered out to settle at the bottom, further improving the filtration effect, especially the primary filtration effect.

[0018] The beneficial effects of this invention are as follows: Using the above scheme, a guide pipe connected to the feed pipe is provided on the bag filter plate. The first iron removal component is directly installed on the tank cover and extends into the guide pipe. This allows most of the magnetic ferrous material to be removed when the material flows in through the feed pipe. Thus, iron removal filtration is added to the existing bag filter, improving filtration performance and integrating the bag filter and iron removal filter into one filter. This results in a compact and reasonable structure with a small footprint. Furthermore, the first iron removal component can be removed directly for cleaning and replacement without opening the tank cover, making cleaning and replacement more convenient and reducing operation time. This reduces the impact of cleaning and replacing the iron removal component on the production line's efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a bag filter for removing iron according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The diagram shows the structure of the bag filter after the bottom support has been removed.

[0021] Figure 3 for Figure 1The diagram shows a partially enlarged structural schematic of the guide pipe in the bag filter.

[0022] Figure 4 for Figure 1 The diagram shows a partially enlarged structural schematic of the connecting seat in the bag filter.

[0023] Figure 5 This is a schematic diagram of the structure of the first iron removal component in an embodiment of the present invention.

[0024] Figures 6-7 This is a schematic diagram of the structure of the second iron removal component according to an embodiment of the present invention. Detailed Implementation

[0025] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0026] As shown in the figure, a bag-type iron removal filter includes a tank body 1, a bag-type perforated plate 2, several filter bag assemblies 3, a tank cover 4, a first iron removal assembly 6, and a second iron removal assembly 7.

[0027] The tank body 1 is a cylindrical pressure-bearing structure with an open top. A feed pipe 11 is provided on the side wall of the tank body 1, and the feed pipe 11 extends into the inner cavity of the tank body 1. A base support 9 is connected to the side wall of the tank body 1.

[0028] A flow guiding layer 8 is also formed on the outside of the tank body 1. The bottom of the tank body 1 is provided with a discharge hole 12, and the discharge hole 12 is connected to the flow guiding layer 8. A discharge pipe 81 is connected to the flow guiding layer 8, and the discharge pipe 81 is located near the top of the tank body 1. A sewage outlet 82 is provided at the bottom of the flow guiding layer 8.

[0029] The bag-type perforated plate 2 is fixedly installed inside the tank body 1 near the upper end. The bag-type perforated plate 2 and the inner wall of the tank body 1 are reliably fixed and sealed by welding. The bag-type perforated plate 2 has three filter bag mounting holes 21 and one through hole distributed circumferentially. A guide pipe 5 is provided in the through hole of the bag-type perforated plate 2. The guide pipe 5 passes through the through hole of the bag-type perforated plate 2 from top to bottom and is sealed and fixed to the bag-type perforated plate 2 by welding. The lower end of the guide pipe 5 is connected to and conducts through the feed pipe 11.

[0030] The filter bag assembly 3 is fixedly installed on each filter bag mounting hole 21 on the bag-type tube sheet 2. The filter bag assembly 3 includes a support basket and filter bags. The upper end of the support basket is engaged with the upper limit of the filter bag mounting hole 21, and the filter bags are placed inside the support basket. The support basket and the upper end of the filter bags are fixed and locked together by a pressure ring. Of course, the structure and installation structure of the filter bag assembly itself are existing conventional technologies, and only a brief description is given here.

[0031] The can lid 4 is sealed to the upper end of the can body 1, wherein the can lid 4 has a mounting seat 41 corresponding to the guide pipe 33.

[0032] The first iron removal assembly 6 includes a sealing cover 61, a plurality of first magnets 62, and a handle 63. The first magnets 62 are evenly distributed at the bottom of the sealing cover 61, and the first magnets 62 are threadedly connected to the sealing cover 61 for easy assembly and disassembly. The handle 63 is fixedly installed on the upper surface of the sealing cover 61. The first iron removal assembly 6 is installed on the mounting base 41 of the can cover 4, and the sealing cover 61 is sealed to the mounting base 41 by a flange. The first magnets 62 pass through the can cover 4 from top to bottom and extend into the guide pipe 5.

[0033] The second iron removal component 7 is disposed inside the filter bag assembly 3, and includes a support frame 71 and a plurality of second magnets 72.

[0034] The support frame 71 includes multiple circular support rings 711 arranged at intervals in the vertical direction. The support rings are connected into a single structure by 2-3 circumferentially distributed U-shaped connecting ribs 712. A handle 714 is provided on the top support ring for easy assembly and disassembly of the support frame within the filter. Each of the remaining support rings has a set of positioning units on its inner side. Each positioning unit includes three positioning rings 713 for positioning and installing the second magnet 72. The positioning rings are connected as a single unit by connecting rods and are connected to the support rings. There are three second magnets 72, which are positioned and installed on the support frame 71 by the positioning units. Of course, the number of positioning rings and the number of second magnets in each positioning unit are only examples and are not actually limited to three.

[0035] The working process of the bag filter is as follows: The material is fed into the feed pipe 11. The material first passes through the guide pipe 5. When the material passes through the guide pipe 5, a large amount of magnetic iron in the material will be attracted away by the first magnet 62 that extends into the guide pipe 5. After passing through the guide pipe 5, the material will gather in the cavity on the upper side of the bag plate 2 and flow into the filter bag through the filter bag installation hole. At this time, the second magnet 72 will adsorb the small amount of residual magnetic iron in the material in the filter bag. As the material continues to be fed, the pressure in the filter bag gradually increases. Under the action of pressure, the material in the filter bag will be filtered through the filter bag. Most of the large particles of impurities will be trapped in the filter bag, while the relatively clean material will pass through the filter bag and enter the guide jacket 8 through the bottom discharge hole 12. As the liquid level continues to rise, the clean material in the guide jacket 8 flows out through the discharge pipe.

[0036] When the bag filter is in operation, the first magnet 62 of the first iron removal component 6 will quickly attract a large amount of magnetic ferrous material. At this time, simply close the valves on the inlet and outlet pipes, and then remove the first iron removal component 6 directly from the tank cover 4 for cleaning or replacement. There is no need to remove the tank cover, making the operation very simple. The tank cover only needs to be removed when the bag filter requires overall cleaning after prolonged operation. At this time, the second iron removal component and the filter bag assembly can be completely removed for cleaning or replacement.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] Please note to all technical personnel: Although the present invention has been described according to the specific embodiments above, the inventive concept of the present invention is not limited to this invention. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. A bag filter for removing iron, comprising: The tank (1) has an opening at its upper end, a feed pipe (11) on its side wall, and a discharge hole (12) at its bottom. A bag-type tube sheet (2) is fixedly installed on the upper end of the tank body (1), and a plurality of filter bag mounting holes (21) are formed on the bag-type tube sheet (2). Several filter bag assemblies (3) are fixedly installed on filter bag mounting holes (21) on the bag-type tube sheet (2); The lid (4) is sealed to the upper end of the tank body (1); Its characteristic is that it further includes: The guide pipe (5) is installed through the bag-type tube sheet (2) from top to bottom. The guide pipe (5) is sealed and fixed to the bag-type tube sheet (2), and its lower end is connected to the feed pipe (11). The first iron removal assembly (6) passes through the tank cover (4) from top to bottom and extends into the guide pipe (5).

2. The bag filter for removing iron according to claim 1, characterized in that: The can lid (4) has a mounting seat (41) corresponding to the guide tube (33). The first iron removal assembly (6) includes: A sealing cap (61) is sealed to the mounting base (41); Several first magnets (62) are fixedly connected to the bottom of the sealing cover (61); The handle (63) is fixedly mounted on the upper end face of the sealing cover (61).

3. The bag filter for removing iron according to claim 1 or 2, characterized in that: The filter bag assembly (3) is equipped with a second iron removal assembly (7).

4. The bag filter for removing iron according to claim 3, characterized in that: The filter bag assembly (3) includes: The support basket is fixedly connected at its upper end to the filter bag mounting hole (21); The filter bag is placed inside the support basket. The second iron removal assembly (7) includes: A support frame (71) is placed inside the filter bag (32); Several second magnets (72) are evenly arranged on the support frame (71).

5. The bag filter for removing iron according to claim 4, characterized in that: The support frame (71) includes: Multiple support rings (711) are arranged at intervals in the vertical direction, and the multiple support rings are connected into an integral structure by multiple connecting ribs (712); Multiple positioning units are fixedly installed inside the support ring (711), and each positioning unit includes multiple positioning rings (713) for positioning and installing the second magnet (72).

6. The bag filter for removing iron according to claim 5, characterized in that: The connecting rib (712) has a U-shaped structure.

7. The bag filter for removing iron according to claim 5, characterized in that: A handle (714) is provided on the support ring located at the top.

8. The bag filter for removing iron according to claim 1, characterized in that: A flow guide jacket (8) is formed on the outside of the tank body (1). The discharge hole (12) is connected to the flow guide jacket (8). A discharge pipe (81) is also connected to the flow guide jacket (8), and the discharge pipe (81) is close to the top of the tank body (1).

9. The bag filter for removing iron according to claim 8, characterized in that: The bottom of the flow guide interlayer (8) is provided with a drain outlet (82).

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