Overflow slurry soft impurity filtering device of two-stage filter screen type limestone cyclone

Abstract

The utility model provides a two-stage filter screen type limestone cyclone overflow slurry soft impurity filtering device which comprises a filtering box body, a first filter screen and a second filter screen are sequentially arranged in the filtering box body in the slurry flowing direction, the first filter screen is arranged at the one-third position of an inlet section of the filtering box body, and the second filter screen is arranged at the other-third position of an outlet section of the filtering box body. The filter screen II is arranged at the two-thirds position of the inlet section of the filter box body; an inlet pipeline and an outlet pipeline are respectively arranged at the lower parts of the two side surfaces of the filtering box body. By adopting the two-stage filter screen, the filtering effect can be effectively improved, the cleaning and maintenance process can be simplified, and when the filter screen is blocked, the slurry circulation can still be ensured not to be influenced, the continuity and the stability of production can be ensured, the system fault can be avoided, and the production efficiency can be improved.

Description

A two-stage limestone hydrocyclone overflow slurry soft debris filtration device Technical Field

[0001] This utility model relates to the field of filtration equipment technology, and in particular to a two-stage limestone hydrocyclone overflow slurry soft debris filtration device. Background Technology

[0002] In industrial processes involving limestone slurry applications, such as limestone-gypsum wet desulfurization, limestone ball mills grind limestone blocks into a slurry. However, during the grinding process, softer impurities such as sawdust, cloth, and mesh may become mixed in. These impurities are relatively light and mostly float within the mill, making them difficult to grind evenly by the steel balls. Consequently, some impurities are discharged from the mill's slag outlet, while others, especially finer impurities, enter the limestone slurry tank through the limestone hydrocyclone. Once these impurities enter the desulfurization system, they can cause numerous serious problems.

[0003] Currently, limestone hydrocyclones are widely used in desulfurization systems. However, existing filtration devices often rely solely on a single filter screen for filtering impurities, and the screen pore size is relatively large, resulting in poor filtration of irregularly shaped or soft impurities. Single-screen filters are prone to clogging and are difficult to clean, severely impacting production continuity and efficiency. To address this issue, a more efficient, convenient, and continuous production filtration device is needed. Summary of the Invention

[0004] The purpose of this invention is to provide a two-stage filter-type limestone hydrocyclone overflow slurry soft impurities filtration device, which can effectively filter soft impurities in the overflow slurry of limestone hydrocyclones, solving the problems of poor filtration effect, inconvenient cleaning and maintenance, and inability to guarantee production continuity in existing technologies. This device adopts a two-stage filter structure design, combined with a reasonable filter pore size and installation position design, to achieve high-efficiency filtration, while also featuring a simple filter disassembly and cleaning method, ensuring that production continuity is not affected.

[0005] According to the purpose of this utility model, this utility model provides a two-stage filter screen type limestone hydrocyclone overflow slurry soft impurity filtration device, including a filter box, in which filter screen one and filter screen two are arranged sequentially along the slurry flow direction. Filter screen one is located at one-third of the inlet section of the filter box, and filter screen two is located at two-thirds of the inlet section of the filter box. Inlet pipe and outlet pipe are respectively provided on the lower part of both sides of the filter box.

[0006] Furthermore, the filter box has a rectangular parallelepiped structure, and the inner wall of the filter box is provided with a filter screen slot one and a filter screen slot two.

[0007] Furthermore, the first filter screen has a pore size of 10mm; the second filter screen has a pore size of 5mm.

[0008] Furthermore, both the first filter slot and the second filter slot adopt a stainless steel guide rail structure that is fixed to the filter box.

[0009] Furthermore, the top edges of filter screen one and filter screen two have an overflow space from the top surface of the filter box.

[0010] Furthermore, the mounting planes of the first and second filter screens form an angle of 85-90° with the direction of slurry flow.

[0011] Furthermore, the inner walls of the first filter slot and the second filter slot are provided with rubber sealing strips.

[0012] Furthermore, the bottom of the filter box is provided with an inclined base plate, the inclined angle of which is 3-5°, and a drain outlet is provided at the lowest point of the inclined base plate.

[0013] Furthermore, the top of the filter housing is provided with an openable maintenance cover.

[0014] Furthermore, the inner wall of the filter box is coated with a thick wear-resistant epoxy resin coating.

[0015] The technical solution of this utility model can effectively improve the filtration effect and simplify the cleaning and maintenance process by using a two-stage filter screen. Even when the filter screen is clogged, it can still ensure that the flow of slurry is not affected, thus ensuring the continuity and stability of production, avoiding system failures, and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 is a front view of an embodiment of the present utility model;

[0018] Figure 2 is a top view of an embodiment of the present utility model;

[0019] Figure 3 is a cross-sectional view of AA in Figure 2 of the embodiment of this utility model;

[0020] Figure 4 is a side view of an embodiment of the present utility model;

[0021] In the diagram: 1. Filter box; 2. Filter screen one; 3. Filter screen two; 4. Filter screen slot one; 5. Filter screen slot two; 6. Inlet pipe; 7. Outlet pipe; 8. Inspection cover; 9. Inclined base plate; 10. Drain outlet. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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; 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 utility model based on the specific circumstances.

[0025] Example 1

[0026] As shown in Figures 1-4:

[0027] A dual-stage limestone hydrocyclone overflow slurry soft debris filtration device includes a filter housing 1. The filter housing 1 contains two stages of filters: filter screen 2 and filter screen 3. Filter screen 2 is positioned at one-third of the inlet of the filter housing 1, while filter screen 3 is positioned at two-thirds of the inlet. Filter screen 2 is used for coarse filtration, and filter screen 3 is used for fine filtration. This differentiated filter screen pore size and installation position design enables graded and efficient filtration of soft debris of different sizes, such as wood chips, fabrics, and mesh, significantly improving the filtration effect compared to a single filter screen.

[0028] This utility model adopts a two-stage filter design, in which filter one performs coarse filtration to intercept larger debris; filter two performs fine filtration to further intercept smaller debris.

[0029] Example 2

[0030] This embodiment is basically the same in structure as Embodiment 1, except that in this embodiment, filter screen 2 and filter screen 3 are installed via filter screen slots. The width of the filter screen slots is 12mm, which facilitates the disassembly and installation of the filters. The filter screen slots include filter screen slot 4 and filter screen slot 5. Filter screen slot 4 is used to fix filter screen 1, ensuring the stability of the filter screen during the filtration process and facilitating the extraction and installation of the filter screen. Both filter screen slots 4 and 5 adopt a stainless steel guide rail structure welded and fixed to the filter housing 1. Rubber sealing strips are provided on the inner walls of filter screen slots 4 and 5.

[0031] Filter slot 25 is used to fix filter 23, and also facilitates the removal and installation of the filter. This design makes filter removal and installation extremely simple. Operators can easily pull out the filter to clean debris, and then put it back into the slot after cleaning, greatly reducing the difficulty and time cost of filter cleaning and maintenance.

[0032] The filter screen is installed via a slot, which facilitates easy removal and installation, improving cleaning and maintenance efficiency. The filter screen is lower than the filter housing, ensuring that in the event of filter clogging, the slurry can overflow into the limestone slurry tank through the space above the filter screen, guaranteeing continuous production.

[0033] Example 3

[0034] This embodiment is basically the same in structure as Embodiment 1, except that in this embodiment, the filter box 1 has a cuboid structure with dimensions of 800mm in length, 400mm in width, and 800mm in height, providing sufficient space for filtration. The filter box 1 is made of carbon steel with a thickness of 3mm. The inlet pipe 6 inside the filter box 1 has a diameter of 200mm and is located on the side of the filter box 1 at one-third of the distance from the bottom. This location helps the slurry to flow evenly into the filter box 1.

[0035] The inlet pipe 6 contains a flange, which is connected to the overflow pipe of the limestone hydrocyclone.

[0036] The outlet pipe 7 inside the filter housing 1 has a size of 200mm. The outlet pipe 7 is located on the side of the filter housing 1 at one-third of the distance from the bottom, symmetrically arranged with the inlet pipe 6. The outlet pipe 7 has a flange for easy connection to the limestone slurry tank. The size of the outlet pipe 7 is 200mm to ensure smooth slurry flow. The material selected is carbon steel.

[0037] Both the inlet pipe 6 and the outlet pipe 7 are DN200 steel pipes, with their center axis at a height of 267mm from the bottom of the filter box 1, and flanges are provided for pipe connection.

[0038] Example 4

[0039] This embodiment is basically the same as the structure of embodiment 1. The difference is that in this embodiment, the height of the filter screen inside the filter box 1 is lower than that of the filter box. Specifically, the top edges of filter screen 1 and filter screen 2 have an overflow space of ≥100mm from the top surface of the filter box 1.

[0040] When the filter screen becomes clogged, the slurry can overflow into the limestone slurry tank through the space above the filter screen. The design of the filtration device ensures that the slurry can continue to flow even when the filter screen is clogged, thus avoiding disruption to production continuity.

[0041] The top of the filter box 1 is equipped with an openable maintenance cover 8. The maintenance cover 8 can be placed directly on the top of the filter box 1. The maintenance cover 8 is made of lightweight plastic sheet, which is easy to open and prevents the overflow slurry of the limestone hydrocyclone from splashing out.

[0042] The filter housing design effectively improves filtration efficiency and reduces the risk of debris entering the subsequent system and causing blockages. The filter unit features a convenient filter screen removal method; after cleaning, the screen can be directly replaced in the slot without stopping the machine.

[0043] The bottom of the filter housing 1 is provided with an inclined base plate 9, the inclination angle of which is 3-5°, and a drain port 10 is provided at the lowest point of the inclined base plate 9. A drain valve is provided on the drain port 10. The inner wall of the filter housing 1 is coated with a 3mm thick wear-resistant epoxy resin coating.

[0044] In the above embodiments, both filter screen 2 and filter screen 3 are made of 304 stainless steel. Filter screen 2 has a pore size of 10mm, and filter screen 3 has a pore size of 5mm, enabling efficient filtration of soft debris of different sizes. The frame structure of filter screen 2 and filter screen 3 is formed by welding 10mm thick 304 stainless steel square tubing, with a mesh wire diameter of 2mm.

[0045] Specifically, the mounting planes of filter screens 1 (2) and 2 (3) form an angle of 85-90° with the direction of slurry flow. Filter screen 1 (2) is 400mm wide and 400mm high, with a 10mm aperture. It is positioned at one-third of the inlet of filter chamber 1 and is used for coarse filtration to intercept larger impurities. The filter screen is made of 304 stainless steel. Filter screen 2 (3) is 400mm wide and 600mm high, with a 5mm aperture. It is positioned at two-thirds of the inlet of filter chamber 1 and is used for further fine filtration to intercept smaller impurities. The filter screen is also made of 304 stainless steel.

[0046] When using this invention, if debris accumulates on the filter screen and needs cleaning, the filter screen can be pulled out along the filter screen slot, cleaned, and then directly put back in, making installation simple. If too much debris accumulates on the filter screen and is not cleaned in time, the slurry can overflow into the limestone slurry tank through the space above the filter screen, ensuring continuous production.

[0047] This invention offers superior filtration: Single-layer filter devices rely on only a single filter layer, resulting in poor filtration of soft, irregularly shaped debris such as wood chips, fabrics, and mesh. Debris easily tangles, and small particles can easily penetrate the filter. This invention, however, employs a two-stage filter design. The first filter, with a 10mm pore size, performs coarse filtration, intercepting larger debris. The second filter, with a 5mm pore size, performs fine filtration. This multi-stage, highly efficient filtration effectively intercepts various types of debris, significantly improving filtration efficiency and reducing the risk of blockages caused by debris entering subsequent systems.

[0048] This invention offers significantly improved maintenance convenience: With single-screen filtration devices, cleaning accumulated debris requires stopping the machine and disassembling the screen, a complex and time-consuming process. In this invention, the screen is installed within the filter housing via a screen clip, making disassembly and installation quick and easy. When there is a large amount of debris on the screen, operators can easily pull it out for cleaning and then simply return it to the clip without stopping the machine. This greatly reduces maintenance difficulty and costs, and improves maintenance efficiency.

[0049] This invention ensures continuous production: In a single-screen filtration device, the machine must be stopped and cleaned when the screen becomes clogged; otherwise, the slurry flow will be obstructed, severely impacting production continuity. Because the screen height is lower than the filter housing, in this invention, when debris on the screen causes clogging, the slurry can overflow into the limestone slurry tank through the space above the screen, ensuring that production is not interrupted due to screen clogging. This guarantees the continuous and stable operation of industrial production and effectively improves production efficiency.

[0050] This utility model relates to a soft debris filtration device for overflow slurry from a limestone hydrocyclone, specifically a two-stage filter screen filtration device, used to effectively filter soft debris such as sawdust, cloth, and mesh in the overflow slurry of a limestone hydrocyclone, solving the problems of poor filtration effect, inconvenient cleaning and maintenance, and inability to guarantee continuous production in the prior art.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus, characterized by, The filter includes a filter housing, in which filter screen one and filter screen two are arranged sequentially along the slurry flow direction. Filter screen one is located at one-third of the inlet section of the filter housing, and filter screen two is located at two-thirds of the inlet section of the filter housing. Inlet pipes and outlet pipes are respectively provided on the lower part of both sides of the filter housing.

2. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 1, wherein, The filter box has a rectangular parallelepiped structure, and the inner wall of the filter box is provided with filter screen slot one and filter screen slot two.

3. The dual-stage limestone hydrocyclone overflow slurry soft impurity filtration device according to claim 1, characterized in that, The first filter screen has a pore size of 10 mm; the second filter screen has a pore size of 5 mm.

4. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 2 wherein, Both the first and second filter slots adopt a stainless steel guide rail structure that is fixed to the filter box.

5. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 1 wherein, The top edges of filter screen one and filter screen two have an overflow space from the top surface of the filter box.

6. The dual-stage limestone hydrocyclone overflow slurry soft impurity filtration device according to claim 1, characterized in that, The mounting planes of filter screen one and filter screen two form an angle of 85-90° with the direction of slurry flow.

7. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 2 wherein, The inner walls of the filter slot one and the filter slot two are provided with rubber sealing strips.

8. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 1 wherein, The bottom of the filter box is provided with an inclined base plate with an inclination angle of 3-5°, and a drain outlet is provided at the lowest point of the inclined base plate.

9. The dual-stage limestone hydrocyclone overflow slurry soft impurity filtration device according to claim 1, characterized in that, The filter housing is equipped with an openable inspection cover on the top.

10. The dual stage screen limestone cyclone overflow slurry soft tramp material filter apparatus as claimed in claim 1 wherein, The inner wall of the filter box is coated with a 3mm thick wear-resistant epoxy resin coating.

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