A cleaning device for disc filters

Abstract

The utility model relates to a kind of cleaning device for disc filter, it is characterized by, including: pressure vessel and the rotation setting of several layers of disc in pressure vessel inside, several layers of disc are rotation setting in pressure vessel inside by the rotation shaft at the center of pressure vessel, the gas cleaning structure, liquid cleaning structure and heating device for promoting gas bubble for being used to clean disc are also set in pressure vessel inside, the gas cleaning structure includes central cleaning structure, spiral cleaning structure and umbrella cleaning structure.Gas cleaning structure, liquid cleaning structure and heating main device are combined and set on disc filter device ontology, the automatic cleaning process of disc filter device is realized without disc filter device disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of disc cleaning, and specifically relates to a cleaning device for disc filters. Background Technology

[0002] Disc filters are a common filtration structure that filters products through multiple layers of rotating discs. When used in the polymerization reaction of PET film production, many impurities from the polyester remain on the discs after filtration. If these impurities are not cleaned promptly, they will affect the filtration efficiency in subsequent applications. Current technology typically cleans these impurities by disassembly. This requires opening the pressure vessel containing the discs, disassembling them layer by layer, cleaning them, and then reinstalling them in the pressure vessel. This cleaning method involves repeated disassembly and reassembly of the pressure vessel and discs, requiring multiple workers and repeated operations, resulting in significant waste of manpower and resources. Furthermore, this repeated disassembly and reassembly can cause wear and tear on the disassembly points of the disc filter, reducing its lifespan. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model proposes a cleaning device for disc filters that incorporates a cleaning structure on the main body of the disc filter and achieves automatic cleaning through connection with an external cleaning agent.

[0004] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, a cleaning device for a disc filter is proposed, comprising a pressure vessel, a rotating shaft disposed inside the pressure vessel, and several layers of discs spaced apart along the axial direction of the pressure vessel on the rotating shaft. The pressure vessel also includes a gas cleaning structure, a liquid cleaning structure, and a heating device for promoting gas bubble formation for cleaning the discs. The gas cleaning structure and the liquid cleaning structure are respectively provided with an air inlet and a liquid inlet connecting a gas supply device and a liquid supply device. The gas cleaning structure includes a central cleaning structure, a spiral cleaning structure, and an umbrella-shaped cleaning structure.

[0005] As an improvement to the above technical solution, the connection between the rotating shaft and the bottom of the pressure vessel is further provided with a first air inlet for communication with a nitrogen generator via a rotary sealing joint.

[0006] As a further improvement to the above technical solution, the central cleaning structure consists of several first air vents located on the shaft at positions where no discs are installed.

[0007] As an improvement to the above technical solution, the spiral cleaning structure is a spirally wound gas supply pipe installed on the inner wall of the pressure vessel and a number of second gas outlets installed on the gas supply pipe. The gas supply pipe is also provided with a second gas inlet that is connected to a nitrogen generator.

[0008] As an improvement to the above technical solution, the umbrella-shaped cleaning structure is an inverted umbrella-shaped structure at the bottom of the pressure vessel and a number of third air outlets provided on the umbrella-shaped structure and facing the disc. The umbrella-shaped cleaning structure is also provided with a third air inlet that is connected to a nitrogen generator.

[0009] As a further improvement to the above technical solution, the center of the umbrella-shaped cleaning structure is provided with a through hole for the shaft to pass through, and the umbrella-shaped cleaning structure body is mounted on the inner wall of the pressure vessel by a bracket.

[0010] As an improvement to the above technical solution, the three air inlets of the gas cleaning structure and the liquid inlet of the liquid cleaning structure are all located at the bottom of the pressure vessel, and the top of the pressure vessel is also provided with an outlet for discharging gas and liquid.

[0011] As a further improvement to the above technical solution, nitrogen gas is introduced through three air inlets in the gas cleaning structure, and triethylene glycol is introduced through a liquid inlet in the liquid cleaning structure.

[0012] As an improvement to the above technical solution, the bottom of the pressure vessel is also provided with a drain trough for removing cleaning agents and impurities after cleaning.

[0013] The beneficial effects of this utility model through the above technical solution are:

[0014] 1. This utility model combines a gas cleaning structure, a liquid cleaning structure, and a heating device on the disc filter body, thereby achieving an automated cleaning process for the disc filter without disassembling it.

[0015] 2. This utility model combines a central cleaning structure, a spiral cleaning structure, and an umbrella-shaped cleaning structure inside the disc device, and achieves a highly efficient cleaning process for the front of the disc by combining the three cleaning methods.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, preferred embodiments are given below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is an isometric drawing of the disc cleaning device of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal cleaning structure of the disc cleaning device of this utility model.

[0019] Figure 3 This is a perspective view of the pressure vessel of the disc cleaning device of this utility model.

[0020] In the picture:

[0021] 1. Pressure vessel; 2. Disc; 3. Rotating shaft; 4. Heating device; 5. Central cleaning structure; 6. Spiral cleaning structure; 7. Umbrella-shaped cleaning structure; 8. Nitrogen generator; 9. First vent; 10. Second vent; 11. Third vent; 12. First inlet; 13. Second inlet; 14. Third inlet; 15. Through hole; 16. Discharge port; 17. Liquid inlet; 18. Drainage tank. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0023] In the description of this utility model, it should be understood that the terms "center," "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 solely for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "first," "second," etc., 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.

[0024] Reference Figure 1 , Figure 3 This invention designs a cleaning device for the automated cleaning of disc filters. During the polymerization reaction of PET film production, many polyester impurities remain on the disc filters used to filter polyester. Cleaning these impurities on the discs is quite troublesome; this cleaning device can be used for automated cleaning. Specifically, the disc filter includes a pressure vessel 1 and several layers of discs 2 rotatably arranged inside the pressure vessel 1. A driving device located at the top of the pressure vessel 1 drives a central rotating shaft 3 to rotate, thereby causing the layers of discs 2 to rotate with the shaft 3 inside the pressure vessel 1. The pressure vessel is generally placed vertically to the ground, with the end closest to the installation position being the bottom and the end furthest from the installation position being the top.

[0025] For this rotating, multi-layered disc structure spaced axially along the axis of rotation, a bottom-to-top cleaning direction is preferred during cleaning. Therefore, a cleaning agent inlet is provided at the bottom of the pressure vessel 1. The cleaning agent cleans the discs 2 inside the pressure vessel 1 using a gas cleaning structure, a liquid cleaning structure, and a heating device 4 that promotes gas bubble formation. The combination of gas and liquid, combined with heating, forms bursting bubbles, enabling a more thorough and effective automated cleaning process for polyester impurities. In this embodiment, nitrogen bubbles are used in the gas cleaning structure, and triethylene glycol is used in the liquid cleaning structure. Nitrogen gas is injected into the gas cleaning structure via a power structure, then enters the pressure vessel 1 and mixes with the triethylene glycol directly introduced into the pressure vessel 1. This mixes with the impurities on the discs 2, and then, through heating by a heating structure located outside the pressure vessel 1, nitrogen bubbles are formed on the discs 2, thereby removing the impurities from the discs 2.

[0026] Reference Figure 2 When cleaning the disc 2 structure using bubbles, the large number of stacked disc 2 layers results in a high height of disc 2 within the pressure vessel 1. When using bottom air and liquid inlet, it is difficult to evenly distribute the gas across all discs 2. Therefore, the gas cleaning structure includes a central cleaning structure 5, a spiral cleaning structure 6, and an umbrella-shaped cleaning structure 7. These three different cleaning structures deliver nitrogen gas to discs 2 at different locations, achieving comprehensive cleaning of disc 2.

[0027] First, targeting the most difficult-to-clean areas—the connections between each disc 2 and the shaft 3—a first vent 9 is provided on the shaft 3 at a location not connected to a disc 2. A first inlet 12 is also provided at the connection between the shaft 3 and the bottom of the pressure vessel 1 via a rotary sealing joint. The nitrogen generator 8 is connected to the shaft 3 through the first inlet 12. Nitrogen enters the shaft 3 through the first inlet 12, forming a central cleaning structure 5 by ejecting nitrogen from several vents distributed on the shaft 3. The nitrogen in the central cleaning structure 5 flows upward along the shaft 3 with the injection from the nitrogen generator 8, and simultaneously ejects along the first vent 9 on the shaft 3 from bottom to top. This sprays nitrogen around the connection between each disc 2 and the shaft 3, and, combined with triethylene glycol flowing in from the bottom, cleans the disc 2 at that location after heating. Of course, besides the area around the connection between the disc 2 and the shaft 3, the sprayed nitrogen will also be directed to other locations, achieving a larger area of ​​nitrogen coverage on the disc 2.

[0028] However, when the nitrogen density in the pressure vessel is low, the nitrogen sprayed through the central cleaning structure 5 will first fall around the connection between the disc 2 and the rotating shaft 3, resulting in poor cleaning effects in other areas. Therefore, a spiral cleaning structure 6 can be provided on the inner wall of the pressure vessel 1. The spiral cleaning structure 6 includes a gas supply pipe spirally distributed on the inner wall of the pressure vessel 1, and the gas supply pipe is provided with several second gas outlets 10 distributed along the length of the gas supply pipe, with the second gas outlets facing the rotating shaft. The spiral gas supply pipe spirally wound on the inner wall of the pressure vessel is relatively close to the edge area of ​​the disc 2 located at the center of the pressure vessel 1. Therefore, most of the nitrogen sprayed from the second gas outlets 10 facing the rotating shaft 3 will fall at the edge of the disc 2, with a small portion falling at other locations, and combined with the triethylene glycol flowing in from the bottom, after heating, will clean the disc 2 at that location. This increases the nitrogen cleaning area and compensates for the shortcomings of the central cleaning structure 5 during cleaning. The gas supply pipe of the spiral cleaning structure 6 extends spirally from the bottom to the top of the pressure vessel 1. Therefore, a second gas inlet 13 is provided at the contact position between the bottom of the gas supply pipe and the pressure vessel 1. The gas supply pipe is connected to the nitrogen generator through the second gas inlet 13, thereby realizing the delivery of nitrogen to the spiral cleaning structure 6.

[0029] In addition, to further ensure the scope and efficiency of nitrogen cleaning, an inverted umbrella-shaped cleaning structure 7 is provided at the bottom of the pressure vessel 1. Several third vent holes are provided on the open surface of the umbrella-shaped cleaning structure 7, and a third inlet 14 connected to the nitrogen generator 8 is provided on the side without the third vent holes. The nitrogen ejected from the third vent holes 11 extends to multiple locations, filling the pressure vessel 1 and spraying nitrogen into areas not reached by the central cleaning structure 5 and the spiral cleaning structure 6, ensuring that all areas of the disc 2 inside the pressure vessel 1 are cleaned efficiently, further guaranteeing the cleaning effect on the disc 2.

[0030] Furthermore, since the umbrella-shaped cleaning structure 7 is located at the bottom of the pressure vessel 1, it interferes with the central rotating shaft 3 that passes through the pressure vessel 1. Therefore, a through hole 15 for the rotating shaft 3 to pass through is also provided at the center of the umbrella-shaped cleaning structure 7. The rotating shaft 3 passes through the through hole 15 and rotates within the through hole 15, thus avoiding interference between the two. However, since the umbrella-shaped cleaning structure with the through hole 15 is difficult to fix at the rotating shaft, a fixing member is also provided at the bottom of the umbrella-shaped cleaning structure to fix it to the inner wall of the pressure vessel 1.

[0031] The combination of the three cleaning structures not only ensures comprehensive cleaning of disc 2 but also accelerates the nitrogen spraying efficiency, increasing the cleaning efficiency of disc 2. In the gas cleaning structure, nitrogen is introduced through the first air inlet 12, the second air inlet 13, and the third air inlet 14. In the liquid cleaning structure, triethylene glycol is introduced through the liquid inlet 17. The three air inlets of the gas cleaning structure and the liquid inlet 17 of the liquid cleaning structure are located at the bottom of the pressure vessel 1. The gas and liquid entering through the first air inlet 12, the second air inlet 13, the third air inlet 14, and the liquid inlet 17 gradually accumulate at the bottom before being discharged through the outlet 16 at the top of the pressure vessel 1, which removes air bubbles and liquid. This ensures that the discharged gas and liquid also pass through each layer of disc 2, avoiding waste of gas and liquid.

[0032] The bottom of the pressure vessel 1 is also provided with a drain trough 18, which is used to remove the remaining nitrogen, triethylene glycol and impurities in the pressure vessel 1 after cleaning.

[0033] The heating device 4 is a jacketed space or a heat tracing coil spirally distributed on the outer wall of the pressure vessel 1.

[0034] The above description is merely a preferred embodiment of this utility model. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments without departing from the technical scope of this utility model and based on its technical essence shall still fall within the scope of this utility model.

Claims

1. A cleaning device for a disc filter, characterized in that, include: The pressure vessel includes a rotating shaft located inside the pressure vessel and several layers of discs spaced apart along the axial direction of the pressure vessel. The pressure vessel also includes a gas cleaning structure, a liquid cleaning structure, and a heating device for cleaning the discs, as well as a device for promoting gas bubble formation. The gas cleaning structure and the liquid cleaning structure are respectively provided with an air inlet and a liquid inlet that connect to the gas supply device and the liquid supply device. The gas cleaning structure includes a central cleaning structure, a spiral cleaning structure, and an umbrella-shaped cleaning structure.

2. The cleaning device for a disc filter according to claim 1, characterized in that, The connection between the rotating shaft and the bottom of the pressure vessel is also provided with a first air inlet for communication with a nitrogen generator via a rotary sealing joint.

3. A cleaning device for a disc filter according to claim 2, characterized in that, The central cleaning structure consists of several first air vents located on the shaft at positions where no discs are installed.

4. A cleaning device for a disc filter according to claim 1, characterized in that, The spiral cleaning structure consists of a spirally wound gas supply pipe installed on the inner wall of the pressure vessel and several second gas outlets installed on the gas supply pipe. The gas supply pipe is also provided with a second gas inlet connected to a nitrogen generator.

5. A cleaning device for a disc filter according to claim 1, characterized in that, The umbrella-shaped cleaning structure is an inverted umbrella-shaped structure at the bottom of the pressure vessel and several third air outlets provided on the umbrella-shaped structure and facing the disc. The umbrella-shaped cleaning structure is also provided with a third air inlet connected to a nitrogen generator.

6. A cleaning device for a disc filter according to claim 5, characterized in that, The umbrella-shaped cleaning structure also has a through hole at its center for the shaft to pass through, and the umbrella-shaped cleaning structure body is mounted on the inner wall of the pressure vessel by a bracket.

7. A cleaning device for a disc filter according to claim 1, characterized in that, The air inlet of the gas cleaning structure and the liquid inlet of the liquid cleaning structure are both located at the bottom of the pressure vessel, and the top of the pressure vessel is also provided with an outlet for discharging gas and liquid.

8. A cleaning device for a disc filter according to claim 7, characterized in that, Nitrogen gas is introduced through the gas inlet in the gas cleaning structure, and triethylene glycol is introduced through the liquid inlet in the liquid cleaning structure.

9. A cleaning device for a disc filter according to claim 1, characterized in that, The bottom of the pressure vessel is also provided with a drain trough to remove cleaning agents and impurities after cleaning.

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