A filter disc device with micro-vibration elastic diaphragm and its use method

Abstract

The present invention relates to a filter disc device with a micro-vibration elastic diaphragm and a method of using the same. The filter disc device with a micro-vibration elastic diaphragm comprises: an outer frame, a filter cloth, a filter screen, a supporting grille, a filter bucket, and a connecting pipe, and is characterized in that a supporting grille is installed on the upper half of the outer frame, a filter screen is provided on the supporting grille, and a filter cloth is provided on the filter screen; a filter bucket is provided in the middle position of the outer frame, and a connecting pipe is fixedly connected below the filter bucket; a frame-shaped plate of a corresponding shape is provided along the inner circle of the outer frame, an elastic diaphragm is installed on the frame-shaped plate, and the elastic diaphragm is connected to a clamping frame and a frame-shaped plate through fasteners, and the shape of the clamping frame is consistent with the inner circle of the outer frame; a central pressure ring and an annular gasket are provided on the connecting pipe, and the elastic diaphragm is pressed onto the annular gasket through the central pressure ring; the present invention has an excellent structure, a low risk of scaling on the surface of the filter bucket, more convenient cleaning and maintenance, and a higher start-up rate of the filter machine.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum filtering equipment, in particular to a filter disc device with a micro-vibration elastic diaphragm and a use method thereof. Background Art

[0002] Traditional vacuum filtration equipment such as rotary disc filters and flip disc filters all use filter disc devices similar to the filter bucket shape, and their main structural forms include filter cloth, filter screen, supporting grid, filter bucket, and pipe. The filter cloth serves to intercept solid particles in the slurry, the filter screen supports the filter cloth, the grid supports the filter cloth and filter screen, the filter bucket is used to collect the filtrate, and the pipe is used to discharge the filtrate.

[0003] Assuming that the filter cloth, filter bucket and outer frame form a space P2, P1 is the external atmospheric pressure zone, when the vacuum filter works in P2, a certain vacuum is formed in the P2 zone under the action of the vacuum pump, and P1 is the atmospheric pressure zone, so a certain pressure difference is formed on the upper and lower sides of the filter cloth 1, and the particles are retained on the surface of the filter cloth to form a filter cake. The filtrate flows through the filter cloth into P2 and converges along the surface of the filter bucket to the center pipe, thereby realizing the solid-liquid separation process.

[0004] The shortcomings of the existing design are: in order to withstand a certain degree of vacuum, the filter must have sufficient mechanical strength. The vibration amplitude of the filter during actual operation is extremely low. Although the surface of the filter is sometimes brushed or polished, its surface still cannot achieve the anti-sticking effect similar to that of polytetrafluoroethylene materials. Especially when the filtrate is prone to cooling and crystallization, scaling is particularly obvious. In severe cases, the scaling will quickly cover the entire filter cavity and cause blockage, greatly reducing the start-up rate of the equipment and making cleaning very difficult. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a filter having a better structure, slight vibration, lower risk of scaling on the filter bucket surface, more convenient cleaning and maintenance, and a higher start-up rate of the filter.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a filter disc device with a micro-vibration elastic diaphragm, comprising: an outer frame, a filter cloth, a filter screen, a support grille, a filter bucket, and a connecting pipe, characterized in that a support grille is installed on the upper half of the outer frame, a filter screen is provided on the support grille, and a filter cloth is provided on the filter screen; a filter bucket is provided in the middle position of the outer frame, and a connecting pipe is fixedly connected below the filter bucket; a frame-shaped plate of corresponding shape is provided along the inner circle of the outer frame, an elastic diaphragm is installed on the frame-shaped plate, and the elastic diaphragm is connected to the clamping frame and the frame-shaped plate through fasteners, and the shape of the clamping frame is consistent with the inner circle of the outer frame; a central pressure ring and an annular gasket are provided on the connecting pipe, and the elastic diaphragm is pressed on the annular gasket through the central pressure ring; the outer frame, the filter cloth and the elastic diaphragm form a space P2, and the outer frame, the elastic diaphragm and the filter bucket form a closed space P3.

[0007] Preferably, the connecting pipe is provided with a connecting pipe, and the connecting pipe can connect the space P2 and the enclosed space P3.

[0008] Preferably, a sealing ring is provided between the supporting grid and the outer frame.

[0009] Preferably, the elastic diaphragm is made of elastic rubber material.

[0010] Preferably, the central pressure ring is a detachable structure.

[0011] Preferably, the center pressure ring is provided with a protrusion, the elastic diaphragm is provided with a groove matching the protrusion, and the elastic diaphragm matches the shape of the center pressure ring and the annular gasket and fits completely, and the center pressure ring can lock the elastic diaphragm on the annular gasket through fasteners.

[0012] A method for using a filter disc device with a micro-vibration elastic diaphragm, using the above-mentioned filter disc device, the method comprises the following steps: A. When in use, the vacuum pump is operated to first extract the air in the P2 area, the filter cloth (1) starts filtering, the elastic diaphragm (9) vibrates with the fluctuation of the airflow in the P2 area, and the air in the P3 area is extracted through the connecting pipe (11), and the elastic diaphragm (9) vibrates under the action of the airflow flowing between the P2 area and the P3 area. B. When cleaning, first remove the filter cloth (1), the filter screen (2), and the support grid (3), then remove the center pressure ring (10) and the connecting pipe (11), and then lift the elastic diaphragm (9) upward along the center position and raise it to a horizontal or convex state for cleaning, and if necessary, remove the pressing frame (6) and the fastener (7), and take out the elastic diaphragm (9) for cleaning.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention provides a structure in which a certain cavity P3 is formed between the elastic diaphragm and the surface of the filter bucket, thereby blocking the direct contact between the filtrate and the filter bucket. Since the connecting pipe connects the air pressure between P2 and P3, only a very small air pressure difference will be generated on the two sides of the elastic diaphragm, and this air pressure difference avoids the diaphragm from being greatly deformed or damaged. When the filter is working, the vacuum degree in the P2 area will produce slight fluctuations at all times under the action of the vacuum pump, and the vacuum degree in the P3 area will change with the change of the vacuum degree in the P2 area, but because its response speed will be delayed for a certain time, a relatively small air pressure difference will be generated between the P2 and P3 areas, and the elastic diaphragm will produce a certain vibration under the action of this small air pressure difference, and when the filtrate flows through the surface of the diaphragm, it is not easy for the scale to be deposited and attached on its surface, thereby achieving a certain anti-sticking effect.

[0014] In addition, the heat transfer effect of the elastic diaphragm is worse than that of the metal filter bucket. To a certain extent, it hinders the heat transfer between the filtrate and the outside atmosphere, and has a certain insulation effect on the filtrate, which reduces the risk of scaling caused by crystallization due to temperature drop.

[0015] The filter disc is easier to clean. When a certain amount of attachment is generated on the surface of the elastic diaphragm, you can first remove the cloth, filter screen, support grille, then remove the center pressure ring and the connecting pipe, and then lift the elastic diaphragm upward along the center position and raise it to a horizontal or convex state. In this state, the elastic diaphragm is easier to clean and can be more thorough. If necessary, you can also remove the fasteners and the compression frame, take out the entire elastic diaphragm and clean it outside the filter bucket. At the same time, you can quickly reload the pre-cleaned elastic diaphragm into the filter bucket, and the filter will soon resume operation. While the filter is running, you can clean the replaced elastic diaphragm by vibration and water flushing. This cleaning method can save a lot of downtime and greatly improve the start-up rate of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a filter disc device with a micro-vibration elastic diaphragm.

[0017] Figure 2 Schematic diagram of the connection between the elastic diaphragm and the outer frame.

[0018] Figure 3 Partial schematic diagram of the elastic diaphragm and the connecting pipe.

[0019] Figure 4 Filter disc cleaning status diagram.

[0020] Explanation of reference numerals: 1 filter cloth, 2 filter screen, 3 support grid, 4 filter bucket, 5 connecting pipe, 6 pressing frame, 7 fastener, 8 frame plate, 9 elastic diaphragm, 10 center pressure ring, 11 connecting pipe, 12 annular gasket, 13 outer frame, 14 protrusion, 15 groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] As shown in the figure, the present invention provides the following technical solution: a filter disc device with a micro-vibration elastic diaphragm, comprising: an outer frame 13, a filter cloth 1, a filter screen 2, a support grille 3, a filter bucket 4, and a pipe 5, characterized in that the upper part of the outer frame 13 is equipped with a support grille 3, and a sealing ring is provided between the support grille 3 and the outer frame 13. A filter screen 2 is provided on the support grille 3, and a filter cloth 1 is provided on the filter screen 2; a filter bucket 4 is provided in the middle position of the outer frame 13, and a pipe 5 is fixedly connected below the filter bucket 4; the pipe 5 is provided with a connecting pipe 11, and the connecting pipe 11 can connect the space P2 and the closed space P3. A frame-shaped plate 8 of a corresponding shape is provided along the inner circle of the outer frame 13, and an elastic diaphragm 9 is installed on the frame-shaped plate 8, and the elastic diaphragm 9 is made of elastic rubber. The elastic diaphragm 9 is connected to the pressing frame 6 and the frame-shaped plate 8 through the fastener 7. The shape of the pressing frame 6 is consistent with the inner circle of the outer frame 13. The connecting pipe 5 is provided with a central pressing ring 10 and an annular gasket 12. The central pressing ring 10 is a detachable structure. The elastic diaphragm 9 is pressed on the annular gasket 12 through the central pressing ring 10. The outer frame 13, the filter cloth 1 and the elastic diaphragm 9 form a space P2. The outer frame 13, the elastic diaphragm 9 and the filter bucket 4 form a closed space P3.

[0023] The center pressure ring 10 is provided with a protrusion 14, and the elastic diaphragm 9 is provided with a groove 15 matching the protrusion 14. The elastic diaphragm 9 matches the shape of the center pressure ring 10 and the annular gasket 12 and fits completely. The center pressure ring 10 can lock the elastic diaphragm 9 on the annular gasket 12 through the fastener 7.

[0024] In summary, the surface of the filter 4 is equipped with an elastic diaphragm 9 and a certain cavity P3 is formed between the surface of the filter 4, blocking the direct contact between the filtrate and the filter 4. Since the connecting pipe 11 connects the air pressure between P2 and P3, only a very small air pressure difference will be generated on the two sides of the elastic diaphragm 9, and this air pressure difference will not cause the diaphragm 9 to be significantly deformed or damaged. When the filter is working, the vacuum degree in the P2 area will always produce slight fluctuations, and the vacuum degree in the P3 area will change with the vacuum degree in the P2 area. However, since its response speed will be delayed for a certain period of time, a relatively small air pressure difference will be generated between the P2 and P3 areas. Under the action of this small air pressure difference, a certain airflow will be generated, thereby causing the elastic diaphragm 9 to vibrate. Under the transmission and action of this energy, it is not easy for scale to deposit and adhere on the surface of the diaphragm when the filtrate flows through the surface of the diaphragm, thereby achieving a certain anti-sticking effect.

[0025] In addition, the elastic diaphragm 9 has a poorer heat transfer effect than the metal filter 4, which hinders the heat transfer between the filtrate and the outside atmosphere to a certain extent, and has a certain insulation effect on the filtrate, thereby reducing the risk of scaling caused by crystallization of the filtrate due to temperature drop.

[0026] When cleaning the filter disc, when a certain amount of attachments are generated on the surface of the elastic diaphragm 9, the cloth 1, filter screen 2, support grid 3 can be removed first, and then the center pressure ring 10 and the connecting pipe 11 can be removed, and then the elastic diaphragm 9 can be lifted upward along the center position and raised to a horizontal or convex state. In this state, the elastic diaphragm 9 can be cleaned more conveniently and thoroughly. If necessary, the fastener 7 and the clamping frame 6 can be disassembled, and the entire elastic diaphragm 9 can be taken out of the filter bucket 4 for cleaning. At the same time, the elastic diaphragm 9 that has been cleaned in advance can be quickly reinstalled into the filter bucket 4, and the filter can be quickly restored to operation. While the filter is running, the replaced elastic diaphragm can be cleaned by vibration and water flushing. This cleaning method can save a lot of downtime, and the start-up rate of the filter will be greatly improved.

[0027] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the appended claims and their equivalents.

Claims

1. A filter disc device with a micro-vibration elastic diaphragm, comprising: An outer frame (13), a filter cloth (1), a filter screen (2), a support grille (3), a filter bucket (4), and a connecting pipe (5), characterized in that the upper part of the outer frame (13) is provided with a support grille (3), a filter screen (2) is provided on the support grille (3), and a filter cloth (1) is provided on the filter screen (2); a filter bucket (4) is provided in the middle of the outer frame (13), and a connecting pipe (5) is fixedly connected below the filter bucket (4); a frame plate (8) of a corresponding shape is provided along the inner circle of the outer frame (13), and an elastic diaphragm (9) is installed on the frame plate (8) The elastic diaphragm (9) is connected to a pressing frame (6) and a frame-shaped plate (8) via a fastener (7); the shape of the pressing frame (6) is consistent with the inner ring of the outer frame (13); a central pressing ring (10) and an annular gasket (12) are provided on the connecting pipe (5); the elastic diaphragm (9) is pressed onto the annular gasket (12) via the central pressing ring (10); the outer frame (13), the filter cloth (1) and the elastic diaphragm (9) form a space P2; the outer frame (13), the elastic diaphragm (9) and the filter bucket (4) form a closed space P3.

2. A filter disc device with a micro-vibration elastic diaphragm according to claim 1, characterized in that: The connecting pipe (5) is provided with a connecting pipe (11), and the connecting pipe (11) can connect the space P2 and the enclosed space P3.

3. A filter disc device with a micro-vibration elastic diaphragm according to claim 1, characterized in that: A sealing ring is provided between the supporting grille (3) and the outer frame (13).

4. A filter disc device with a micro-vibration elastic diaphragm according to claim 1, characterized in that: The elastic diaphragm (9) is made of elastic rubber material.

5. A filter disc device with a micro-vibration elastic diaphragm according to claim 1, characterized in that: The central pressure ring (10) is a detachable structure.

6. A filter disc device with a micro-vibration elastic diaphragm according to claim 1, characterized in that: The central pressure ring (10) is provided with a protrusion (14), the elastic diaphragm (9) is provided with a groove (15) matching the protrusion (14), and the elastic diaphragm (9) matches the shape of the central pressure ring (10) and the annular gasket (12) and fits completely together, and the central pressure ring (10) can lock the elastic diaphragm (9) on the annular gasket (12) through a fastener (7).

7. A method for using a filter disc device with a micro-vibration elastic diaphragm, characterized in that: Using the filter disc device according to claim 2, the method comprises the following steps: A. When in use, the vacuum pump works to first draw out the air in the P2 region, the filter cloth (1) starts filtering, the elastic diaphragm (9) vibrates with the fluctuation of the airflow in the P2 region, and the air in the P3 region is drawn out through the connecting pipe (11), and the elastic diaphragm (9) vibrates under the action of the airflow flowing between the P2 region and the P3 region; B. When cleaning, first remove the filter cloth (1), filter screen (2), and support grid (3), then remove the center pressure ring (10) and the connecting pipe (11), and then lift the elastic diaphragm (9) upward along the center position and raise it to a horizontal or convex state for cleaning. If necessary, remove the pressing frame (6) and fasteners (7), and take out the elastic diaphragm (9) for cleaning.

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