Sewage pretreatment device with stable treatment

Abstract

The utility model relates to the technical field of sewage pretreatment, in particular to a sewage pretreatment device with stable treatment, which comprises a bottom plate, a treatment tank is fixedly mounted at the top of the bottom plate through support legs, the top of the treatment tank is connected with a top cover through a flange, and a filter component is arranged on the inner side wall of the top cover. A cleaning assembly is arranged on the outer side wall of the top cover; the filtering assembly comprises a rotating disc, the rotating disc penetrates through the top of the top cover and is rotationally connected with the top cover through a bearing, the bottom of the rotating disc is connected with a filter cartridge through a flange, a port which is coaxially distributed with the filter cartridge and has the diameter smaller than that of the filter cartridge is formed in the top of the rotating disc in a penetrating manner, and a water outlet pipe is arranged in the filter cartridge; waste water is filtered through the filter cartridge, high-pressure washing is conducted, the scraper is matched with the filter cartridge to rotate to remove slag, and the device has the advantages of efficient solid-liquid separation, blockage prevention, easy maintenance and long-term stable operation.

Description

Technical Field

[0001] This utility model relates to the field of wastewater pretreatment technology, and specifically discloses a wastewater pretreatment device for stable treatment. Background Technology

[0002] In the field of wastewater treatment, pretreatment is a crucial step in removing large particulate pollutants such as suspended solids and colloidal impurities from wastewater, and its treatment effect directly affects the stability of subsequent biological treatment, membrane filtration, and other processes. Currently, most common wastewater pretreatment devices employ structures such as fixed filter cartridges, filter screens, or grids to achieve solid-liquid separation through physical interception.

[0003] However, common wastewater pretreatment devices are prone to filter clogging and have low cleaning efficiency. When treating wastewater with high suspended solids, impurities easily adhere to the filter screen surface and form a filter cake, leading to increased filtration resistance and decreased treatment efficiency. Frequent shutdowns are required for manual rinsing or filter screen replacement, resulting in high maintenance costs and affecting continuous system operation. The problem of impurity deposition on the tank wall is also prominent: the lack of an effective tank wall cleaning mechanism allows suspended solids to easily deposit on the inner wall and bottom of the treatment tank, forming dead corners and breeding microorganisms. This not only reduces the effective volume of the device but may also lead to secondary pollution. Utility Model Content

[0004] This utility model proposes a stable wastewater pretreatment device that filters wastewater through a filter cartridge, performs high-pressure rinsing, and uses a scraper to remove sludge by rotating the filter cartridge. It features efficient solid-liquid separation, anti-clogging, easy maintenance, and long-term stable operation.

[0005] This utility model is implemented as follows: a pretreatment device for stable sewage treatment includes a base plate, a treatment tank is fixedly installed on the top of the base plate by means of support legs, a top cover is connected to the top of the treatment tank by means of a flange, a filter assembly is provided on the inner side wall of the top cover, and a cleaning assembly is provided on the outer side wall of the top cover.

[0006] The filter assembly includes a rotating disk that passes through the top of the top cover and is rotatably connected to the top cover via a bearing. A filter cylinder is connected to the bottom of the rotating disk via a flange. A port coaxially distributed with the filter cylinder and having a diameter smaller than that of the filter cylinder is opened through the top of the rotating disk. A water outlet pipe is provided inside the filter cylinder.

[0007] The cleaning assembly includes a flushing pipe, a scraper, and a second vertical plate. The flushing pipe is located inside the filter cartridge and is L-shaped. Multiple nozzles are connected to the side of the flushing pipe near the inner wall of the filter cartridge. The scraper is located inside the treatment tank and is attached to the inner wall of the treatment tank. The second vertical plate is fixedly installed on the outer wall of the top cover.

[0008] As a preferred embodiment of the present invention for a stable wastewater pretreatment device, the filter assembly further includes a first vertical plate, which is vertically fixed to the top of the top cover, and a water pump is fixedly installed on one side of the first vertical plate. The other end of the outlet pipe passes through the port and extends to the outside of the filter cartridge. The input end of the water pump is connected to the outlet pipe through a pipe.

[0009] As a preferred embodiment of the present invention, a worm gear motor is fixedly installed on the outer wall of the first vertical plate. The output end of the worm gear motor passes through the first vertical plate and is fixedly installed with a first bevel gear. The first bevel gear is meshed with a second bevel gear fixedly installed on the top of the rotating disk.

[0010] As a preferred embodiment of the present invention, a booster pump is fixedly installed on the outer wall of the second vertical plate, and the output end of the booster pump is connected to the flushing pipe through a pipeline.

[0011] As a preferred embodiment of the present invention for a stable wastewater pretreatment device, a connecting rod is fixedly installed at the bottom of the rotating disk, and the other end of the connecting rod is fixedly connected to the scraper.

[0012] As a preferred embodiment of the present invention, a pretreatment device for treating stable wastewater is provided, wherein the bottom of the treatment tank is connected to a slag discharge pipe with a valve, and the outer wall of the treatment tank is connected to a water inlet pipe.

[0013] As a preferred embodiment of the present invention, a stable wastewater pretreatment device is provided on the top of the top cover, and the sensor of the level gauge extends into the interior of the treatment tank and is located on the outside of the filter cartridge.

[0014] The beneficial effects of this utility model are:

[0015] 1. A water pump creates a pressure difference through the outlet pipe to quickly extract clean water from the filter cartridge, ensuring a stable, continuous, and efficient solid-liquid separation process and preventing filtrate retention from affecting processing efficiency.

[0016] 2. The booster pump drives the nozzle of the flushing pipe to spray high-pressure water. Combined with the rotation of the filter cartridge, it achieves 360° flushing of the inner wall without dead angles, effectively removing sticky impurities, restoring the water permeability of the filter screen, and extending the service life of the filter cartridge. The rotating disc drives the scraper to rotate against the tank wall through the connecting rod, scraping off the deposited sludge and impurities and pushing them to the slag discharge pipe, avoiding manual tank cleaning and reducing maintenance frequency and labor intensity. Attached Figure Description

[0017] 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. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is an overall structural diagram of a stable wastewater pretreatment device according to the present invention.

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 This is a structural diagram of the filter cartridge and scraper of this utility model.

[0021] Figure 4 This is a top view of the rotating disk of this utility model.

[0022] The markings in the diagram are: 1. Base plate; 2. Processing tank; 201. Top cover; 202. Slag discharge pipe; 203. Level gauge; 204. Water inlet pipe; 3. Rotating disc; 301. Port; 4. Filter cartridge; 5. First vertical plate; 501. Water pump; 502. Water outlet pipe; 6. Worm gear motor; 601. First bevel gear; 602. Second bevel gear; 7. Second vertical plate; 701. Booster pump; 702. Flushing pipe; 8. Connecting rod; 801. Scraper. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-4 A pretreatment device for treating stable wastewater includes a base plate 1, a treatment tank 2 fixedly installed on the top of the base plate 1 by means of support legs, a top cover 201 connected to the top of the treatment tank 2 by means of a flange, a filter assembly provided on the inner side wall of the top cover 201, and a cleaning assembly provided on the outer side wall of the top cover 201.

[0025] The filter assembly includes a rotating disk 3, which passes through the top of the top cover 201 and is rotatably connected to the top cover 201 via a bearing. The bottom of the rotating disk 3 is connected to a filter cylinder 4 via a flange. The top of the rotating disk 3 has a port 301 that is coaxially distributed with the filter cylinder 4 and has a diameter smaller than that of the filter cylinder 4. The filter cylinder 4 has an outlet pipe 502 inside.

[0026] The cleaning assembly includes a flushing pipe 702, a scraper 801, and a second vertical plate 7. The flushing pipe 702 is located inside the filter cartridge 4 and is L-shaped. Multiple nozzles are connected to the side of the flushing pipe 702 near the inner wall of the filter cartridge 4. The scraper 801 is located inside the treatment tank 2 and is attached to the inner wall of the treatment tank 2. The second vertical plate 7 is fixedly installed on the outer wall of the top cover 201.

[0027] In this embodiment: wastewater enters the treatment tank 2 through the inlet pipe 204, enters the filter cylinder 4 through the filter screen, and is pumped out by the water pump 501 through the outlet pipe 502. Impurities are trapped on the outside of the filter cylinder 4, achieving preliminary solid-liquid separation. The booster pump 701 delivers high-pressure water to the L-shaped flushing pipe 702 inside the filter cylinder 4, sprays it out through the nozzle, and through the worm gear motor 6, the filter cylinder 4 rotates to fully cover and flush its inner wall, peel off the attached impurities, and prevent the filter screen from clogging. The rotating disk 3 drives the scraper 801 to rotate through the connecting rod 8, pushing the deposited sludge to the bottom sludge discharge pipe 202, realizing automatic cleaning of the inner wall and bottom of the tank.

[0028] As a technical optimization of this utility model, the filter assembly also includes a first vertical plate 5, which is vertically fixed to the top of the top cover 201, and a water pump 501 is fixedly installed on one side of it. The other end of the water outlet pipe 502 passes through the port 301 and extends to the outside of the filter cartridge 4. The input end of the water pump 501 is connected to the water outlet pipe 502 through a pipe.

[0029] In this embodiment: after the water pump 501 is started, a negative pressure is formed inside it and connected to the water outlet pipe 502. Since the water outlet pipe 502 is located inside the filter cartridge 4 and the other end extends through the port 301 to the outside of the filter cartridge 4, under the action of the water pump 501, the sewage that has been initially filtered inside the filter cartridge 4 will be drawn out through the water outlet pipe 502 and transported to the subsequent treatment stage, thereby realizing the function of the filter assembly in filtering and transporting sewage.

[0030] As a technical optimization of this utility model, a worm gear motor 6 is fixedly installed on the outer wall of the first vertical plate 5. The output end of the worm gear motor 6 passes through the first vertical plate 5 and is fixedly installed with a first bevel gear 601. The first bevel gear 601 is meshed with a second bevel gear 602 fixedly installed on the top of the rotating disk 3.

[0031] In this embodiment: After the worm gear motor 6 starts, its output end drives the first bevel gear 601 to rotate. The first bevel gear 601 meshes with the second bevel gear 602 fixed on the top of the rotating disk 3. Through gear transmission, the power of the motor is transmitted to the rotating disk 3, so that the rotating disk 3 rotates around the connection point with the bearing on the top of the top cover 201. The rotation of the rotating disk 3 drives the filter cartridge 4 connected to it to rotate, so that the sewage can contact the filter cartridge 4 more evenly.

[0032] As a technical optimization of this utility model, a booster pump 701 is fixedly installed on the outer wall of the second vertical plate 7, and the output end of the booster pump 701 is connected to the flushing pipe 702 through a pipe.

[0033] In this embodiment: After the booster pump 701 is started, it pressurizes the incoming water. The pressurized water is then transported to the flushing pipe 702 through a pipeline. Since the flushing pipe 702 is L-shaped and located inside the filter cartridge 4, and there are multiple nozzles on the side near the inner wall of the filter cartridge 4, high-pressure water will spray out from the nozzles to flush the inner wall of the filter cartridge 4, remove impurities attached to it, and ensure the filtration performance of the filter cartridge 4.

[0034] As a technical optimization of this utility model, a connecting rod 8 is fixedly installed at the bottom of the rotating disk 3, and the other end of the connecting rod 8 is fixedly connected to the scraper 801.

[0035] In this embodiment: when the rotating disk 3 rotates under the drive of the worm gear motor 6 and the bevel gear transmission, the connecting rod 8 will rotate accordingly, thereby driving the scraper 801 to make a circular motion around the central axis of the processing tank 2 inside the processing tank 2. Since the scraper 801 is in contact with the inner wall of the processing tank 2, during its rotation, it can scrape off the impurities attached to the inner wall of the processing tank 2, causing them to settle to the bottom of the processing tank 2, thus cleaning the inner wall of the processing tank 2.

[0036] As a technical optimization of this utility model, the bottom of the treatment tank 2 is connected to a slag discharge pipe 202 with a valve, and the outer side wall of the treatment tank 2 is connected to a water inlet pipe 204.

[0037] In this embodiment: the inlet pipe 204 is connected to the outer wall of the treatment tank 2. The sewage to be treated flows into the treatment tank 2 through the inlet pipe 204, providing raw materials for the entire sewage pretreatment process. The slag discharge pipe 202 at the bottom of the treatment tank 2 is equipped with a valve. During the sewage pretreatment process, the impurities intercepted by the filter cartridge 4 and the impurities scraped off by the scraper 801 will settle to the bottom of the treatment tank 2. When it is necessary to discharge these impurities, the valve on the slag discharge pipe 202 is opened, and the impurities will be discharged from the treatment tank 2 through the slag discharge pipe 202 under the action of gravity, thereby realizing the periodic cleaning of impurities.

[0038] As a technical optimization of this utility model, a liquid level gauge 203 is provided on the top of the top cover 201. The sensor of the liquid level gauge 203 extends into the interior of the processing tank 2 and is located on the outside of the filter cartridge 4.

[0039] In this embodiment, the sensor of the level gauge 203 can monitor the liquid level of the sewage in the treatment tank 2 in real time.

[0040] The working principle and usage process of this utility model are as follows: The device is electrically connected to an external power supply and a PLC controller. When in use, sewage enters the treatment tank 2 through the inlet pipe 204. The level gauge 203 monitors the sewage level outside the filter cartridge 4 in real time and can control the inlet water volume to prevent sewage overflow. The sewage is filtered through the filter screen of the filter cartridge 4. The filtered clean water enters the filter cartridge 4 and is pumped out by the water pump 501 through the outlet pipe 502 to complete the solid-liquid separation.

[0041] When cleaning the filter cartridge 4, the water inlet pipe 204 stops supplying water, and the sludge discharge pipe 202 valve is opened to discharge the sludge accumulated at the bottom of the treatment tank 2. Driven by the worm gear motor 6, the filter cartridge 4 drives the rotating disk 3 to rotate through the first bevel gear 601 and the second bevel gear 602, so that the filter cartridge 4 rotates synchronously. The booster pump 701 sprays high-pressure water into the inner wall of the filter cartridge 4 through the flushing pipe 702. The nozzle washes off the impurities attached to the inner wall of the filter cartridge 4. The continuous rotation of the filter cartridge 4 makes the flushing cover the entire inner surface. The connecting rod 8 at the bottom of the rotating disk 3 rotates synchronously with the filter cartridge 4, driving the scraper 801 to scrape along the inner wall of the treatment tank 2. The scraper 801 pushes the sludge and impurities deposited at the bottom of the treatment tank 2 to the bottom sludge discharge pipe 202 to avoid accumulation and affect the treatment effect, and ensure the stable operation of the wastewater treatment.

[0042] The top cover 201 integrates filtration and cleaning components, and the flange connection design facilitates disassembly and maintenance, ensuring long-term stable operation of the device.

[0043] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0044] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A pretreatment device for treating stable wastewater, comprising a base plate (1), characterized in that: The top of the base plate (1) is fixedly installed with a treatment tank (2) by a support leg. The top of the treatment tank (2) is connected to a top cover (201) by a flange. The inner side wall of the top cover (201) is provided with a filter assembly, and the outer side wall of the top cover (201) is provided with a cleaning assembly. The filter assembly includes a rotating disk (3), which passes through the top of the top cover (201) and is rotatably connected to the top cover (201) via a bearing. The bottom of the rotating disk (3) is connected to a filter cylinder (4) via a flange. The top of the rotating disk (3) has a port (301) that is coaxially distributed with the filter cylinder (4) and has a diameter smaller than that of the filter cylinder (4). The filter cylinder (4) has an outlet pipe (502) inside. The cleaning assembly includes a flushing pipe (702), a scraper (801), and a second vertical plate (7). The flushing pipe (702) is located inside the filter cartridge (4) and is L-shaped. Multiple nozzles are connected to the side of the flushing pipe (702) near the inner wall of the filter cartridge (4). The scraper (801) is located inside the treatment tank (2) and is attached to the inner wall of the treatment tank (2). The second vertical plate (7) is fixedly installed on the outer wall of the top cover (201).

2. The wastewater pretreatment device for stable treatment according to claim 1, characterized in that: The filter assembly also includes a first vertical plate (5), which is vertically fixed to the top of the top cover (201) and a water pump (501) is fixedly installed on one side of it. The other end of the water outlet pipe (502) passes through the port (301) and extends to the outside of the filter cartridge (4). The input end of the water pump (501) is connected to the water outlet pipe (502) through a pipe.

3. The wastewater pretreatment device for stable treatment according to claim 2, characterized in that: A worm gear motor (6) is fixedly installed on the outer wall of the first vertical plate (5). The output end of the worm gear motor (6) passes through the first vertical plate (5) and is fixedly installed with a first bevel gear (601). The first bevel gear (601) is meshed with a second bevel gear (602) fixedly installed on the top of the rotating disk (3).

4. The wastewater pretreatment device for stable treatment according to claim 1, characterized in that: A booster pump (701) is fixedly installed on the outer wall of the second vertical plate (7), and the output end of the booster pump (701) is connected to the flushing pipe (702) through a pipe.

5. A pretreatment device for treating stable wastewater according to claim 1, characterized in that: A connecting rod (8) is fixedly installed at the bottom of the rotating disk (3), and the other end of the connecting rod (8) is fixedly connected to the scraper (801).

6. The wastewater pretreatment device for stable treatment according to claim 1, characterized in that: The bottom of the treatment tank (2) is connected to a slag discharge pipe (202) with a valve, and the outer side wall of the treatment tank (2) is connected to a water inlet pipe (204).

7. A pretreatment device for treating stable wastewater according to claim 1, characterized in that: A level gauge (203) is provided on the top of the top cover (201), and the sensor of the level gauge (203) extends into the interior of the processing tank (2) and is located on the outside of the filter cartridge (4).

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