A back-flushable industrial wastewater filter device

Abstract

The utility model relates to sewage treatment technical field especially, more particularly to an industrial sewage filtering device of backflushing, including support, filter jar, controller, water inlet, first valve body, water outlet, second valve body, mounting plate and filter cartridge etc. The utility model discloses the cooperation of air compressor and pulse solenoid valve, realizes the pulse type backflush of compressed air to filter cartridge from inside to outside, has reached the effect of high -efficient backflush, the recovery filter cartridge permeability.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a backwashable industrial wastewater filtration device. Background Technology

[0002] Industrial wastewater filtration devices are key equipment in industrial water treatment systems, widely used in industries such as chemical, pharmaceutical, printing and dyeing, metallurgy, and food processing. They are used to remove suspended particles, impurities, and some colloidal substances from wastewater to achieve water purification, reuse, or discharge that meets standards. With increasingly stringent environmental standards and rising demands for water resource recycling, higher requirements are being placed on the filtration efficiency and operational stability of filtration devices. Traditional filtration equipment often uses a single filter screen or filter cartridge structure, which is prone to clogging, requiring frequent shutdowns for cleaning or component replacement. This not only increases maintenance costs but also affects production continuity.

[0003] Currently, while some filtration devices on the market have incorporated backwashing technology, problems such as incomplete cleaning and limited cleaning methods still exist. Most devices rely on water backwashing, which is insufficient to effectively remove stubborn dirt adhering to the inner wall of the filter cartridge, resulting in limited cleaning effectiveness and inadequate restoration of the filter cartridge's flow capacity. Furthermore, existing devices lack a dynamic self-cleaning mechanism for the filter cartridge during operation, allowing impurities to accumulate continuously on the filter surface, accelerating clogging and shortening the normal filtration cycle. Although some devices attempt to add mechanical scraper structures, these are often complex in structure, lack coordinated operation, or lack elastic buffer design, leading to poor fit between the scraper and the filter cartridge, posing a risk of uneven scraping or damage to the filter cartridge.

[0004] Therefore, it is necessary to design a backwashable industrial wastewater filtration device to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of existing industrial wastewater filtration devices, such as easy clogging, incomplete cleaning, poor backwashing effect and frequent maintenance, this utility model provides an industrial wastewater filtration device that can be backwashed.

[0006] The technical solution is as follows: A backwashable industrial wastewater filtration device includes a support frame, a filter tank, a controller, an inlet, a first valve body, an outlet, a second valve body, a mounting plate, a filter cartridge, an air compressor, an air tank, a transmission pipe, a third valve body, a connecting pipe, a pulse solenoid valve, a drain outlet, and a fourth valve body. The filter tank is fixedly connected to the front top of the support frame. The controller is located on the front of the filter tank. Mounting plates are fixedly connected to the upper and lower sides of the filter tank. The lower mounting plate and the lower part of the filter tank form a lower cavity. The lower left side of the lower cavity is connected to and communicates with the inlet. The first valve body is located at the left end of the inlet. The upper right side of the filter tank is connected to and communicates with the outlet. The second valve body is located at the outlet. Multiple connecting pipes are fixedly connected between the two mounting plates. The filter cartridges are arranged in a ring around the center. An air compressor is fixedly connected to the top rear side of the support. The output port of the air compressor is connected to the input port of the air tank. The top of the air tank is connected to and connected to a transmission pipe. The transmission pipe extends upward and connects to and connects to the top of the filter tank. A third valve body is provided at the connection between the transmission pipe and the filter tank. The transmission pipe passes through the top of the filter tank and is connected to and connected to a connecting pipe. A pulse solenoid valve is provided at the top of the upper mounting plate corresponding to the position of each filter cartridge. The output port of the pulse solenoid valve is connected to the inside of the corresponding filter cartridge through a through hole on the upper mounting plate. A drain port is connected to and connected to the bottom of the lower cavity. A fourth valve body is provided on the drain port. The first valve body, the second valve body, the third valve body, the fourth valve body, the air compressor, and the pulse solenoid valve are all electrically connected to the controller.

[0007] Optionally, it also includes mounting blocks and guide rods. Mounting blocks are fixedly connected to the outer side of the upper and lower mounting plates at the corresponding filter cartridge openings, and guide rods are fixedly connected between the upper and lower mounting blocks.

[0008] Optionally, it also includes a fixing ring and a guide ring. A fixing ring is fixedly connected to the inner wall of the middle part of each filter cartridge, and two guide rings are slidably sleeved on the guide rod, one of which is located above the fixing ring and the other is located below the fixing ring.

[0009] Optionally, it also includes a cleaning scraper, with the cleaning scraper connected to the outer periphery of the guide ring via a connecting rod, and the cleaning scraper slidingly contacting the inner wall of the filter cartridge.

[0010] Optionally, it also includes a guide plate, which is fixedly mounted on the connecting rod of the guide ring and the cleaning scraper, and the guide plate is inclined in the direction of the water flow.

[0011] Optionally, it also includes springs, with springs provided between the retaining ring and the guide ring above it, and between the lower mounting plate and the guide ring below it.

[0012] The beneficial effects of this utility model are: 1. This utility model coordinates the opening and closing of the first valve body, the second valve body, the third valve body and the fourth valve body through the controller, and in combination with the cooperation of the air compressor and the pulse solenoid valve, to realize the pulse backwashing of the filter cartridge from the inside to the outside by compressed air. Combined with the pressure difference change inside and outside the filter cartridge, it quickly removes the attached dirt, and achieves the effect of efficient backwashing and restoring the permeability of the filter cartridge.

[0013] 2. This utility model utilizes the force of water flow on the guide plate during the filtration process to drive the guide ring to slide back and forth along the guide rod, thereby driving the cleaning scraper to continuously and slightly scrape the inner wall of the filter cartridge, preventing impurities from accumulating and clogging, thus achieving the effect of online self-cleaning and extending the continuous operation cycle.

[0014] 3. This utility model, by setting a spring between the fixed ring and the guide ring, and combining the sliding cooperation between the guide rod and the guide ring, enables the cleaning scraper to generate an impact scraping action under the propulsion of airflow during the backwashing stage, thereby enhancing the ability to remove stubborn dirt and achieving the effect of improving the thoroughness of cleaning and the stability of equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a partial cross-sectional view of the components of this utility model, including the support, filter tank, and controller.

[0017] Figure 3 This is a partial cross-sectional view of the components of this utility model, including the water inlet, connecting pipe, and mounting plate.

[0018] Figure 4 This is a schematic diagram of the filter cartridge, pulse solenoid valve, and mounting block of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the cleaning scraper, guide plate, and spring components of this utility model.

[0020] The components in the attached diagram are labeled as follows: 1_Bracket, 2_Filter tank, 3_Controller, 4_Inlet, 5_First valve body, 6_Outlet, 7_Second valve body, 8_Mounting plate, 9_Filter cartridge, 91_Fixing ring, 10_Air compressor, 11_Air tank, 12_Transmission pipe, 13_Third valve body, 14_Connecting pipe, 15_Pulse solenoid valve, 16_Drain outlet, 17_Fourth valve body, 18_Mounting block, 19_Guide rod, 20_Guide ring, 21_Cleaning scraper, 22_Baffle plate, 23_Spring. Detailed Implementation

[0021] Example: A backwashable industrial wastewater filtration device, such as Figures 1-5As shown, the system includes a bracket 1, a filter tank 2, a controller 3, a water inlet 4, a first valve body 5, a water outlet 6, a second valve body 7, a mounting plate 8, filter cartridges 9, an air compressor 10, an air tank 11, a transmission pipe 12, a third valve body 13, a connecting pipe 14, a pulse solenoid valve 15, a drain outlet 16, and a fourth valve body 17. The filter tank 2 is bolted to the top front of the bracket 1. The controller 3 is located on the front of the filter tank 2. Mounting plates 8 are integrally formed on the upper and lower sides of the filter tank 2. The lower mounting plate 8 and the lower part of the filter tank 2 form a lower cavity. The lower left side of the lower cavity is connected to and communicates with the water inlet 4. The first valve body 5 is located at the left end of the water inlet 4. The upper right side of the filter tank 2 is connected to and communicates with the water outlet 6. The second valve body 7 is located at the water outlet 6. Multiple filter cartridges 9 arranged around the center are bolted between the two mounting plates 8. An air compressor 10 is bolted to the top rear side of the air tank 11. The output port of the air compressor 10 is connected to the input port of the air tank 11. The top of the air tank 11 is connected to and connected to a transmission pipe 12. The transmission pipe 12 extends upward and is connected to and connected to the top of the filter tank 2. A third valve body 13 is provided at the connection between the transmission pipe 12 and the filter tank 2. The transmission pipe 12 passes through the top of the filter tank 2 and is connected to and connected to a connecting pipe 14. A pulse solenoid valve 15 is provided at the top of the upper mounting plate 8 corresponding to the position of each filter cartridge 9. The output port of the pulse solenoid valve 15 is connected to the interior of the corresponding filter cartridge 9 through a through hole on the upper mounting plate 8. A drain port 16 is connected to and connected to the bottom of the lower cavity. A fourth valve body 17 is provided on the drain port 16. The first valve body 5, the second valve body 7, the third valve body 13, the fourth valve body 17, the air compressor 10, and the pulse solenoid valve 15 are all electrically connected to the controller 3.

[0022] like Figure 4 and Figure 5 As shown, it also includes mounting blocks 18, guide rods 19, fixing rings 91, guide rings 20, cleaning scrapers 21, flow guides 22, and springs 23. The upper mounting plate 8 and the lower mounting plate 8 are both connected to the mounting blocks 18 by bolts at the outer sides of the corresponding openings of the filter cartridge 9. The upper and lower mounting blocks 18 are connected to the guide rods 19 by welding. The inner wall of the middle part of each filter cartridge 9 is connected to the fixing ring 91 by welding. Two guide rings 20 are slidably sleeved on the guide rods 19, one of which is located above the fixing ring 91 and the other is located below the fixing ring 91. The outer periphery of the guide rings 20 is connected to the cleaning scrapers 21 by connecting rods. The cleaning scrapers 21 slide in contact with the inner wall of the filter cartridge 9. The flow guides 22 are fixed on the connecting rods of the guide rings 20 and the cleaning scrapers 21. The flow guides 22 are inclined towards the direction of water flow. Springs 23 are provided between the fixing ring 91 and the guide ring 20 above it, and between the lower mounting plate 8 and the guide ring 20 below it.

[0023] Operators can apply the corresponding technical solutions in this device to industrial wastewater treatment and recycling technologies according to specific circumstances. When this device is needed to assist in the efficient filtration and cleaning of wastewater, firstly, the wastewater to be treated is introduced into the filter tank 2 through the inlet 4. At this time, the controller 3 controls the first valve body 5 and the second valve body 7 to open, while the third valve body 13 and the fourth valve body 17 are in the closed state, entering the normal filtration operation mode.

[0024] Under pressure, wastewater flows upward through multiple filter cartridges 9 inside the filter tank 2. Suspended solids and particulate impurities in the water are trapped on the inner wall surface of the filter cartridges 9, while clean water passes through the internal structure of the filter cartridges 9 and is discharged from the outlet 6, achieving a continuous and stable water purification process. As the water flows continuously through the filter cartridges 9, the water flow creates a thrust on the guide plate 22, causing the guide ring 20 connected to it to slide slightly back and forth along the guide rod 19. This movement is transmitted to the cleaning scraper 21, causing it to adhere to the inner wall of the filter cartridge 9 for dynamic scraping, effectively inhibiting the accumulation of impurities on the surface of the filter cartridge 9, delaying clogging, and thus maintaining a high filtration efficiency.

[0025] As the operating time increases, a certain amount of dirt gradually accumulates on the inner wall of the filter cartridge 9, causing the filtration resistance to rise. The operator can start the backwashing program through the controller 3. First, the first valve body 5 and the second valve body 7 are closed to cut off the inlet and outlet water flow. Then, the fourth valve body 17 is opened to prepare for sewage discharge. Subsequently, the air compressor 10 is started and compressed air is charged into the air tank 11. When the air pressure reaches the set value, the third valve body 13 is opened, and the compressed air enters the connecting pipe 14 through the transmission pipe 12 and is distributed to each pulse solenoid valve 15.

[0026] Under the command of controller 3, pulse solenoid valve 15 opens sequentially or synchronously, and high-pressure gas is rapidly injected into the internal space of the corresponding filter cartridge 9, forming an instantaneous high-pressure airflow from the inside out. This reverse airflow impacts the scale on the inner wall of the filter cartridge 9, causing it to loosen and fall off. At the same time, the airflow pressure pushes the guide ring 20 down rapidly along the guide rod 19, compressing the spring 23 and driving the cleaning scraper 21 to perform a powerful scraping action on the inner wall of the filter cartridge 9, further removing stubborn deposits. The removed impurities fall into the bottom area of ​​the filter tank 2 with the airflow and residual liquid, and are finally discharged from the tank through the opened drain port 16, completing an efficient cleaning process.

[0027] After backwashing is completed, pulse solenoid valve 15 closes, air compressor 10 stops running, third valve body 13 and fourth valve body 17 close in succession, returning to the initial state, and the inlet and outlet water channels are reopened, and the device enters the next stage of filtration operation.

Claims

1. A backwashable industrial wastewater filtration device, characterized in that, The system includes a bracket (1), a filter tank (2), a controller (3), an inlet (4), a first valve body (5), an outlet (6), a second valve body (7), a mounting plate (8), a filter cartridge (9), an air compressor (10), an air tank (11), a transmission pipe (12), a third valve body (13), a connecting pipe (14), a pulse solenoid valve (15), a drain outlet (16), and a fourth valve body (17). The filter tank (2) is fixedly connected to the front top of the bracket (1), and the front of the filter tank (2) is equipped with a controller. The filter tank (2) is fixedly connected to the upper and lower sides of the filter tank (2). The lower mounting plate (8) and the lower part of the filter tank (2) form a lower cavity. The lower left side of the lower cavity is connected to and communicates with an inlet (4). The left end of the inlet (4) is provided with a first valve body (5). The upper right side of the filter tank (2) is connected to and communicates with an outlet (6). The outlet (6) is provided with a second valve body (7). Multiple filter cylinders (9) arranged around the center are fixedly connected between the two mounting plates (8). (1) An air compressor (10) is fixedly connected to the rear of the top. The output port of the air compressor (10) is connected to the input port of the air tank (11). The top of the air tank (11) is connected to and connected to a transmission pipe (12). The transmission pipe (12) extends upward and is connected to and connected to the top of the filter tank (2). A third valve body (13) is provided at the connection between the transmission pipe (12) and the filter tank (2). The transmission pipe (12) passes through the top of the filter tank (2) and is connected to and connected to a connecting pipe (14). The top of the mounting plate (8) on the upper side is aligned with the top of the filter tank (2). A pulse solenoid valve (15) is provided at the position of each filter cartridge (9). The output port of the pulse solenoid valve (15) is connected to the interior of the corresponding filter cartridge (9) through the through hole on the upper mounting plate (8). The bottom of the lower cavity is connected to and connected to a drain port (16). A fourth valve body (17) is provided on the drain port (16). The first valve body (5), the second valve body (7), the third valve body (13), the fourth valve body (17), the air compressor (10) and the pulse solenoid valve (15) are all electrically connected to the controller (3).

2. The backwashable industrial wastewater filtration device according to claim 1, characterized in that, It also includes mounting blocks (18) and guide rods (19). The upper mounting plate (8) and the lower mounting plate (8) are fixedly connected to the mounting blocks (18) on the outside of the corresponding filter cartridge (9) openings. The guide rods (19) are fixedly connected between the upper and lower mounting blocks (18).

3. A backwashable industrial wastewater filtration device according to claim 2, characterized in that, It also includes a fixing ring (91) and a guide ring (20). The fixing ring (91) is fixedly connected to the inner wall of the middle part of each filter cylinder (9). Two guide rings (20) are slidably sleeved on the guide rod (19), one of which is located above the fixing ring (91) and the other is located below the fixing ring (91).

4. A backwashable industrial wastewater filtration device according to claim 3, characterized in that, It also includes a cleaning scraper (21), and the outer periphery of the guide ring (20) is connected to the cleaning scraper (21) via a connecting rod. The cleaning scraper (21) slides in contact with the inner wall of the filter cartridge (9).

5. A backwashable industrial wastewater filtration device according to claim 4, characterized in that, It also includes a guide plate (22), and the guide plate (22) is fixed on the connecting rod of the guide ring (20) and the cleaning scraper (21). The guide plate (22) is inclined towards the direction of water flow.

6. A backwashable industrial wastewater filtration device according to claim 5, characterized in that, It also includes springs (23), with springs (23) provided between the fixing ring (91) and the guide ring (20) above it, and between the lower mounting plate (8) and the guide ring (20) below it.

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