Multi-stage filtering device

Abstract

The utility model discloses a multistage filtering device which comprises a shell, the shell is cylindrical, the bottom of the shell is open, a bottom cover is attached to the bottom of the shell, a liquid inlet pipe is fixedly connected to the bottom end of the side wall of the shell, a liquid outlet pipe is fixed to the middle of the top wall of the shell, and a plurality of filtering net cylinders are arranged in the shell. The multiple filter screen cylinders are different in diameter, meshes of the multiple filter screen cylinders are sequentially enlarged from inside to outside, connecting assemblies are fixed to the two sides of the upper surface of the bottom cover, and two connecting plates connected with the connecting assemblies in a matched and clamped mode are fixed to the bottom end of the outer side wall of the shell. According to the utility model, the shell, the bottom cover, the liquid inlet pipe, the liquid outlet pipe and the plurality of filter screen cylinders are arranged, the plurality of filter screen cylinders which are mutually sleeved are utilized to realize graded filtration of mother liquor, the filter screen cylinders are prevented from being quickly blocked, and the mother liquor can be more thoroughly filtered and the filtering effect is better by adopting a graded filtration mode.

Description

Technical Field

[0001] This utility model relates to the field of mother liquor filtration technology, and in particular to a multi-stage filtration device. Background Technology

[0002] Mother liquor filtration refers to the process of separating insoluble solids or impurities from a liquid (mother liquor) obtained after a chemical reaction, crystallization, or precipitation using physical methods. It is a common operation in chemical experiments and industrial production. Its core purpose is to purify the target product, recover the solvent, or remove unreacted raw materials. Mother liquor filtration is widely used in pharmaceuticals, chemicals, and environmental protection, such as drug purification and wastewater treatment. During operation, attention must be paid to safety (e.g., ventilation, explosion protection) and efficiency (avoiding filter media clogging) to ensure separation effectiveness and experimental safety.

[0003] Existing filtration devices for mother liquor recovery typically have only one layer of filtration structure. When the mother liquor passes through the filtration structure, a large amount of crystallization, regardless of particle size, quickly covers the surface of the filtration structure, causing blockage. This slows down the subsequent filtration speed, requiring frequent cleaning of the filtration structure and affecting filtration efficiency. Furthermore, each disassembly of the device for cleaning the internal filtration structure is time-consuming, impacting the efficiency of subsequent device maintenance. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-stage filtration device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage filtration device, comprising a housing, the housing being cylindrical in shape and having an open bottom, a bottom cover being fitted to the bottom of the housing, an inlet pipe being fixedly connected to the bottom end of the side wall of the housing, an outlet pipe being fixed to the middle of the top wall of the housing, multiple filter cylinders being provided inside the housing, the multiple filter cylinders having different diameters, and the mesh size of the multiple filter cylinders increasing sequentially from the inside to the outside, connecting components being fixed to both sides of the upper surface of the bottom cover, and two connecting plates that match and snap onto the connecting components being fixed to the bottom end of the outer side wall of the housing, the bottom cover being fixed to the connecting plates through the connecting components.

[0006] Furthermore, both the inlet pipe and the outlet pipe are fixedly connected to flanges at the ends away from the outer casing, and the inlet pipe is located on the tangent of the outer casing.

[0007] Furthermore, multiple annular plates are fixed to the inner top wall of the outer shell, and the tops of the multiple filter cylinders are respectively sleeved on the surfaces of the multiple annular plates.

[0008] Furthermore, a sealing gasket is fixedly connected to the upper surface of the bottom cover, and the bottom ends of the multiple filter cylinders and the bottom end of the outer shell are all in contact with the upper surface of the sealing gasket.

[0009] Furthermore, the connecting plate has an insertion hole in the middle, and the connecting assembly includes an insertion block fixed to the upper surface of the bottom cover. The top of the insertion block passes through the insertion hole and has a groove on its side wall. A spring is fixedly connected to the inner side wall of the groove, and a locking tooth is fixedly connected to the other end of the spring. The end of the locking tooth away from the spring is engaged with the upper surface of the connecting plate, and the top of the end of the locking tooth away from the spring is designed with a slope.

[0010] Furthermore, a sampling tube is fixedly connected to the middle of the bottom cover, and a valve is fixedly connected to the middle of the sampling tube.

[0011] Furthermore, a transparent viewing window is fixedly connected to the side wall of the outer casing.

[0012] The beneficial effects of this utility model are:

[0013] 1. In use, this utility model is a multi-stage filtration device, which includes a shell, a bottom cover, an inlet pipe, an outlet pipe, and multiple filter cylinders. Multiple interlocking filter cylinders are used to achieve graded filtration of the mother liquor, avoiding rapid clogging of the filter cylinders. The graded filtration method ensures more thorough filtration of the mother liquor and better filtration effect.

[0014] 2. In use, this utility model is a multi-stage filtration device, which includes an outer shell, a bottom cover, a connecting component, and a connecting plate. The bottom cover is quickly fixed to the connecting plate through the connecting component, so that the bottom cover can be quickly fixed to the bottom of the outer shell and can also be quickly disassembled, making it easy to remove the filter screen from the inside of the outer shell for cleaning, thus improving the maintenance efficiency of the device in the later stages. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : Overall sectional view of this utility model;

[0017] Figure 2 : A perspective view of the outer shell of this utility model;

[0018] Figure 3 : A three-dimensional view of the filter cylinder of this utility model;

[0019] Figure 4 The present utility model Figure 1 Enlarged view of point A in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Outer shell; 2. Bottom cover; 3. Inlet pipe; 4. Outlet pipe; 5. Filter screen cylinder; 6. Annular plate; 7. Connecting assembly; 71. Insert block; 72. Groove; 73. Spring; 74. Clamping tooth; 8. Connecting plate; 81. Insertion hole; 9. Sealing gasket; 10. Sampling tube; 11. Valve; 12. Viewing window; 13. Flange. Detailed Implementation

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

[0023] like Figures 1-4 As shown, a multi-stage filtration device is disclosed, comprising a housing 1, which is cylindrical in shape and has an open bottom. A bottom cover 2 is fitted to the bottom of the housing 1. An inlet pipe 3 is fixedly connected to the bottom of the side wall of the housing 1, and an outlet pipe 4 is fixedly connected to the middle of the top wall of the housing 1. Multiple filter cylinders 5 are provided inside the housing 1. The multiple filter cylinders 5 have different diameters, and the mesh size of the multiple filter cylinders 5 increases sequentially from the inside to the outside. Connecting components 7 are fixed on both sides of the upper surface of the bottom cover 2. Two connecting plates 8 are fixed to the bottom of the outer side wall of the housing 1 and are matched and snapped with the connecting components 7. The bottom cover 2 is fixed to the connecting plates 8 through the connecting components 7.

[0024] Both the inlet pipe 3 and the outlet pipe 4 are fixedly connected to flanges 13 at the ends away from the outer casing 1, and the inlet pipe 3 is located on the tangent of the outer casing 1.

[0025] In this embodiment, the mother liquor is connected to the mother liquor delivery pipeline via the inlet pipe 3 and the outlet pipe 4. The mother liquor enters the interior of the outer shell 1 through the inlet pipe 3, and then passes through multiple filter cylinders 5 in sequence before being discharged from the outlet pipe 4, thus achieving filtration of the mother liquor. By placing the inlet pipe 3 on the tangent of the outer shell 1, when the mother liquor enters the interior of the outer shell 1, it will rotate as it enters the interior of the outer shell 1, thereby causing the mother liquor inside the outer shell 1 to rotate. Because the mother liquor rotates continuously, the crystallizing liquid is less likely to adhere to and get stuck on the surface of the filter cylinders 5, thereby improving the service life of the filter cylinders 5.

[0026] Multiple annular plates 6 are fixed to the inner top wall of the outer casing 1, and the tops of multiple filter cylinders 5 are respectively fitted onto the surfaces of the multiple annular plates 6.

[0027] In this embodiment, the filter cylinder 5 can be positioned by setting the annular plate 6. During installation, the top of the filter cylinder 5 is directly placed on the surface of the annular plate 6, which realizes the rapid positioning of the filter cylinder 5 and avoids the filter cylinder 5 from shifting inside the outer shell 1.

[0028] A sealing gasket 9 is fixedly connected to the upper surface of the bottom cover 2, and the bottom ends of multiple filter cylinders 5 and the bottom end of the outer shell 1 are all in contact with the upper surface of the sealing gasket 9.

[0029] When the bottom cover 2 is attached to the bottom of the outer shell 1, the bottom cover 2 presses the bottom of the filter cylinder 5, thereby fixing the filter cylinder 5 inside the outer shell 1. This makes the installation and fixing of the filter cylinder 5 simpler and more convenient, and also makes the subsequent disassembly of the filter cylinder 5 easier and faster.

[0030] The connecting plate 8 has a socket 81 in the middle. The connecting component 7 includes a plug 71 fixed to the upper surface of the bottom cover 2. The top of the plug 71 passes through the socket 81 and the side wall has a groove 72. A spring 73 is fixedly connected to the inner side wall of the groove 72. A locking tooth 74 is fixedly connected to the other end of the spring 73. The end of the locking tooth 74 away from the spring 73 is engaged with the upper surface of the connecting plate 8, and the top of the end of the locking tooth 74 away from the spring 73 is designed with a slope.

[0031] In this embodiment, when installing the bottom cover 2, the inserts 71 on both sides of the bottom cover 2 are aligned with the insertion holes 81 on the two connecting plates 8 and inserted. The retaining teeth 74 are first pressed back into the grooves 72 by the inner walls of the insertion holes 81. After the retaining teeth 74 have completely passed through the insertion holes 81, the spring 73 presses the retaining teeth 74 to pop out from the grooves 72, and the retaining teeth 74 will then lock onto the upper surface of the connecting plate 8. This achieves a quick and secure connection between the bottom cover 2 and the connecting plate 8, thus fixing the bottom cover 2 to the bottom of the outer shell 1. When disassembling, the retaining teeth 74 are pressed back into the grooves 72, and then the inserts 71 can be pulled out from the insertion holes 81 to disassemble the bottom cover 2.

[0032] A sampling tube 10 is fixedly connected to the middle of the bottom cover 2, and a valve 11 is fixedly connected to the middle of the sampling tube 10.

[0033] In this embodiment, after setting up the sampling tube 10, the valve 11 is opened to facilitate the discharge of the mother liquor that has passed through multiple filter cylinders 5 from the sampling tube 10. The presence of crystal particles in the discharged mother liquor is observed, thereby determining whether the filter cylinder 5 has failed.

[0034] A transparent viewing window 12 is fixedly connected to the side wall of the outer casing 1. This allows for easy observation of the mother liquor filtration process through the viewing window 12.

[0035] Working principle: The inlet pipe 3 and outlet pipe 4 are connected to the mother liquor delivery pipeline via flange 13. The mother liquor enters the interior of the outer casing 1 through the inlet pipe 3, passes through multiple filter cylinders 5 in sequence, and exits through the outlet pipe 4. Crystallized particles in the mother liquor are blocked on the outside of the filter cylinders 5. When it is necessary to clean the crystallized particles on the outer wall of the filter cylinders 5, the bottom cover 2 is removed from the bottom of the outer casing 1, and then the multiple filter cylinders 5 inside the outer casing 1 can be removed for cleaning. After cleaning, the filter cylinders 5 are reinstalled inside the outer casing 1, and the bottom cover 2 is then fixed.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage filtration device, comprising a housing (1), characterized in that: The outer shell (1) is cylindrical and has an open bottom. A bottom cover (2) is attached to the bottom of the outer shell (1). An inlet pipe (3) is fixedly connected to the bottom of the side wall of the outer shell (1). An outlet pipe (4) is fixed in the middle of the top wall of the outer shell (1). Multiple filter cylinders (5) are provided inside the outer shell (1). The multiple filter cylinders (5) have different diameters and the mesh size of the multiple filter cylinders (5) increases from the inside to the outside. Connecting components (7) are fixed on both sides of the upper surface of the bottom cover (2). Two connecting plates (8) that match and snap together with the connecting components (7) are fixed at the bottom of the outer side wall of the outer shell (1). The bottom cover (2) is fixed to the connecting plates (8) through the connecting components (7).

2. The multi-stage filtration device according to claim 1, characterized in that: The inlet pipe (3) and outlet pipe (4) are both fixedly connected to flanges (13) at the ends away from the outer shell (1), and the inlet pipe (3) is located on the tangent of the outer shell (1).

3. The multi-stage filtration device according to claim 1, characterized in that: Multiple annular plates (6) are fixed to the inner top wall of the outer shell (1), and the tops of the multiple filter cylinders (5) are respectively sleeved on the surface of the multiple annular plates (6).

4. The multi-stage filtration device according to claim 1, characterized in that: A sealing gasket (9) is fixedly connected to the upper surface of the bottom cover (2), and the bottom ends of the multiple filter cylinders (5) and the bottom end of the outer shell (1) are all in contact with the upper surface of the sealing gasket (9).

5. A multi-stage filtration device according to claim 1, characterized in that: The connecting plate (8) has a socket (81) in the middle. The connecting assembly (7) includes a plug (71) fixed to the upper surface of the bottom cover (2). The top of the plug (71) passes through the socket (81) and the side wall has a groove (72). A spring (73) is fixedly connected to the inner side wall of the groove (72). A locking tooth (74) is fixedly connected to the other end of the spring (73). The end of the locking tooth (74) away from the spring (73) is engaged with the upper surface of the connecting plate (8), and the top of the end of the locking tooth (74) away from the spring (73) is designed with a slope.

6. A multi-stage filtration device according to claim 1, characterized in that: A sampling tube (10) is fixedly connected to the middle of the bottom cover (2), and a valve (11) is fixedly connected to the middle of the sampling tube (10).

7. A multi-stage filtration device according to claim 1, characterized in that: A transparent viewing window (12) is fixedly connected to the side wall of the outer shell (1).

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