Self-cleaning disc filter

Abstract

The utility model provides a self-cleaning disc filter which comprises a tank body, a central shaft arranged in the tank body, a motor for driving the central shaft to rotate, a plurality of filter discs arranged on the central shaft, a scraper shaft, a plurality of distribution pipes connected to the scraper shaft, scrapers connected to the distribution pipes, a cleaning shaft and a plurality of cleaning pipes connected to the cleaning shaft, the nozzle is connected to the cleaning pipe; the hydraulic swing cylinder drives the scraper shaft and the cleaning shaft to rotate; and the scraper and the nozzle can rotate to the surface of the filter disc. The self-cleaning disc filter provided by the utility model can automatically control the thickness of a filter cake on the surface of the filter disc, realizes the purpose of protecting the disc with residues, reduces the abrasion of the filter disc, prolongs the service life, maintains the thickness of the filter cake to be constant, ensures high filtering flux, can realize the self-cleaning regeneration of the filter disc, saves time and labor, and improves the working efficiency. The problems that traditional equipment is fast in flux attenuation, serious in filter disc abrasion and tedious in operation are solved.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a self-cleaning disc filter. Background Technology

[0002] Disc filters are widely used filtration equipment for solid-liquid separation, especially suitable for handling large-flow, low-concentration suspensions. They are applicable to continuous and efficient solid-liquid separation in industries such as chemical, mining, and food processing. Disc filters use vacuum suction or pressurization to force the liquid in a suspension through the filter discs, while solid particles are trapped to form a filter cake, thus achieving solid-liquid separation.

[0003] Traditional disc filters often employ a single filtration method, such as surface filtration or depth filtration, which suffers from problems such as easy clogging of the filter discs, thickening of the filter cake layer leading to decreased throughput, severe wear of the filter discs, and the need for frequent shutdowns for cleaning. In view of this, this application designs a self-cleaning disc filter to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to disclose a self-cleaning disc filter, which can automatically control the thickness of the filter cake on the surface of the filter disc, realize "protecting the disc with slag", reduce filter disc wear, extend service life, maintain constant filter cake thickness, ensure high filtration throughput, and realize self-cleaning and regeneration of the filter disc, saving time and effort, and solving the problems of rapid throughput decay, severe filter disc wear and cumbersome operation of traditional equipment.

[0005] To achieve the above objectives, this utility model provides a self-cleaning disc filter, comprising a tank, a central shaft installed inside the tank, a motor driving the central shaft to rotate, a plurality of filter discs installed on the central shaft, a scraper shaft, a plurality of distribution pipes connected to the scraper shaft, scrapers connected to the distribution pipes, a cleaning shaft, a plurality of cleaning pipes connected to the cleaning shaft, nozzles connected to the cleaning pipes, and a hydraulic swing cylinder driving the scraper shaft and the cleaning shaft to rotate; the scrapers and nozzles are rotatable to the surface of the filter discs.

[0006] In some implementations, a bottom scraper connected to the central shaft is also included.

[0007] In some embodiments, the central shaft is hollow and has a clear liquid outlet. Liquid is filtered through a filter plate, enters the central shaft, and then flows out from the clear liquid outlet.

[0008] In some embodiments, the gap between the scraper and the filter disc surface is 1-10 mm.

[0009] In some embodiments, the scraper shaft and the cleaning shaft are positioned close to the side wall of the tank.

[0010] In some embodiments, the tank is provided with a slag discharge port.

[0011] In some embodiments, the filter disc is a double-sided filter disc.

[0012] In some embodiments, the nozzle is a fan-shaped nozzle.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The self-cleaning disc filter provided by this utility model can automatically control the thickness of the filter cake on the surface of the filter disc, realize "protecting the disc with slag", reduce filter disc wear, extend service life, maintain constant filter cake thickness, ensure high filtration throughput, and realize self-cleaning and regeneration of the filter disc, saving time and effort, and solving the problems of rapid throughput decay, severe filter disc wear and cumbersome operation of traditional equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the internal structure of the self-cleaning disc filter shown in this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the self-cleaning disc filter shown in this utility model. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0017] like Figure 1 and 2 The self-cleaning disc filter shown includes a tank 1, a central shaft 2 rotatably mounted inside the tank 1, a motor 6 driving the central shaft 2, and several filter discs 3 mounted on the central shaft 2. The central shaft 2 is hollow and has a clear liquid outlet 7. The filter discs 3 are double-sided filter discs, which effectively increase the filtration area and extend the filtration cycle.

[0018] Material enters tank 1, motor 6 drives central shaft 2 to rotate, filter disc 3 rotates synchronously at a constant speed, solid particles form dynamic filter cake layer on the surface of filter disc 3, dynamic filter cake layer as filter medium intercepts fine particles, realizes "protecting the disc with slag", reduces wear of filter disc 3 and extends service life, clear liquid penetrates dynamic filter cake layer and filter disc 3 into central shaft 2 and is discharged from clear liquid outlet 7.

[0019] It also includes a scraper shaft 9, several distribution pipes 11 connected to the scraper shaft 9, scrapers 10 connected to the distribution pipes 11, a cleaning shaft 12, several cleaning pipes 13 connected to the cleaning shaft 12, nozzles 14 connected to the cleaning pipes 13, and two hydraulic swing cylinders 8 that drive the scraper shaft 9 and the cleaning shaft 12 to rotate respectively. The scraper shaft 9 and the cleaning shaft 12 are located near the side wall of the tank body 1.

[0020] Each distribution pipe 11 is equipped with two scrapers 10, one for the upper surface and one for the lower surface of adjacent filter discs 3, thus ensuring that each filter disc 3 has scrapers 10 on both its upper and lower surfaces. The scrapers 10 rotate to the surface of the filter disc 3 under the drive of the hydraulic cylinder 8. The gap between the scraper 10 and the surface of the filter disc 3 is 1-10 mm, set as needed, preferably 5 mm. When the dynamic filter cake layer thickens to the point of contact with the scraper 10, the scraper 10 continuously scrapes off the excessively thick filter cake, maintaining a constant filter cake thickness and ensuring high filtration throughput.

[0021] After filtration, the scraper 10 rotates to the side wall of the tank 1 under the drive of the hydraulic swing cylinder 8. Then, the central shaft 2 rotates at high speed to remove the residual filter cake and discharge the slag. Next, driven by the hydraulic swing cylinder 8, the cleaning shaft 12 drives the nozzle 14 on the cleaning pipe 13 to enter the surface of the filter disc 3, spraying and cleaning to regenerate the filter disc 3, saving time and effort. The nozzle 14 is a fan-shaped nozzle, and the spray angle covers the entire surface of the filter disc 3.

[0022] It also includes a bottom scraper 4 connected to the central shaft 2. The bottom scraper 4 rotates synchronously with the central shaft 2 to scrape up the residue at the bottom of the tank 1 and prevent it from sticking. The tank 1 is provided with a slag discharge port 5 for slag discharge.

[0023] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-cleaning disc filter, characterized in that, It includes a tank body, a central shaft installed inside the tank body, a motor that drives the central shaft to rotate, several filter discs installed on the central shaft, a scraper shaft, several distribution pipes connected to the scraper shaft, scrapers connected to the distribution pipes, a cleaning shaft, several cleaning pipes connected to the cleaning shaft, nozzles connected to the cleaning pipes, and a hydraulic swing cylinder that drives the scraper shaft and the cleaning shaft to rotate; the scrapers and nozzles can rotate to the surface of the filter discs.

2. The self-cleaning disc filter according to claim 1, characterized in that, It also includes a bottom scraper connected to the central axis.

3. The self-cleaning disc filter according to claim 1, characterized in that, The central shaft is hollow and has a clear liquid outlet. The liquid is filtered through a filter plate, enters the central shaft, and then flows out from the clear liquid outlet.

4. The self-cleaning disc filter according to claim 1, characterized in that, The gap between the scraper and the filter disc surface is 1-10mm.

5. The self-cleaning disc filter according to claim 1, characterized in that, The scraper shaft and the cleaning shaft are located near the side wall of the tank.

6. The self-cleaning disc filter according to claim 1, characterized in that, The tank is equipped with a slag discharge port.

7. The self-cleaning disc filter according to claim 1, characterized in that, The filter disc is a double-sided filter disc.

8. The self-cleaning disc filter according to claim 1, characterized in that, The nozzle is a fan-shaped nozzle.

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