Sewage filtering system

Abstract

The utility model discloses a sewage filtering system which comprises a water inlet pipeline and a water outlet pipeline, at least two filtering tanks are connected between the water inlet pipeline and the water outlet pipeline in parallel, a water inlet pipe communicated with the water inlet pipeline is arranged at the upper end of each filtering tank, and a water outlet pipe communicated with the water outlet pipeline is arranged at the bottom end of each filtering tank. The upper ends of the filtering tanks are provided with drainage pipes located on one sides of the water inlet pipes, the water inlet pipes and the water outlet pipes are provided with three-way valves, and the three-way valves located on the same filtering tank are in bypass communication. The at least two filtering tanks are connected between the water inlet pipeline and the water outlet pipeline in parallel, the three-way valves are arranged on the filtering tanks and used for switching the communication relation among the water inlet pipeline, the water outlet pipeline and the filtering tanks, the filtering tanks can be cleaned in sequence, shutdown is avoided, operation is convenient, and meanwhile the filtering efficiency is improved. The problem that the backwash tank needs to be shut down during backwash at present is effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of filtration equipment, and specifically relates to a sewage filtration system. Background Technology

[0002] The textile industry is a well-known water consumer, typically requiring 100 to 200 tons of water to process one ton of textiles. Taking shirts as an example, it takes about 150 tons of water to produce one ton of cotton fabric from cotton to finished garment, with the dyeing and printing process using as much as 98 tons of water, accounting for 65% of the total water consumption, making it the largest water-consuming stage.

[0003] Therefore, in order to save costs and conserve water resources, textile companies generally install filtration equipment to filter wastewater after use, so that the wastewater meets the standards for reuse after filtration, which effectively reduces costs and saves water resources.

[0004] Currently, wastewater from textile production is generally filtered through multiple stages before it can be reused. In the primary filtration process, quartz sand is typically used for filtration. The impurities in the water are trapped through the pores between the sand particles. After a period of use, the impurities between the sand particles are discharged through the drain pipe by backwashing, and the sand particles become clean again, thus enabling long-term use. This type of tank is generally called a backwash tank.

[0005] However, in actual production, since filtration is a complete system, when the backwash tank needs to be backwashed, it will cause a shutdown, affecting the progress of wastewater filtration and hindering subsequent work.

[0006] Meanwhile, the quartz sand filter layer will churn during the backwashing process, and after the backwashing is completed, the quartz sand filter layer is often no longer flat, resulting in different filtration effects in different locations and increasing the burden on subsequent filtration equipment.

[0007] Publication document CN201420609537.3 discloses an easy-to-backwash quartz sand filter, including a tank with supporting feet at the bottom, a water inlet at the top, a water outlet at the bottom, an air outlet pipe on one side of the water inlet, a viewing window on the upper side wall of the tank, a quartz sand filter media layer inside the tank, and a corresponding discharge port on the side wall. The tank has a backwash outlet and a backwash inlet above and below the quartz sand filter media layer, respectively. The backwash inlet is connected to a water collection pipe located at the lower end of the quartz sand filter media layer, with multiple water outlets evenly distributed on the water collection pipe. An air collection pipe is horizontally arranged inside the quartz sand filter media layer, with several air nozzles evenly distributed on the air collection pipe. One end of the air collection pipe extends out of the tank and is equipped with an air valve. This utility model has a simple and reasonable structure, allowing for convenient backwashing of the quartz sand filter media layer during cleaning. It provides good cleaning effect, is fast, and prevents dirt residue, effectively improving work efficiency.

[0008] Public document CN201521016920.9 discloses a backwashing quartz sand filter, mainly composed of a tank, an upper conveying pipe, a lower conveying pipe, an exhaust pipe, a manhole, a water inlet, a water outlet, a backwash inlet, a backwash outlet, a discharge port, a forward wash inlet, and a pressure gauge. The upper conveying pipe is located in the upper part of the tank, with an exhaust pipe on one side. An inlet is located on one side of the bottom of the upper conveying pipe, and a backwash outlet is located on the other side. The lower conveying pipe is located in the lower part of the tank, with a forward wash inlet on the left side of the middle of the lower conveying pipe, an outlet on one side of the upper part of the lower conveying pipe, and a backwash inlet on the other side. A discharge port is located on the lower left side of the tank. Manholes are located on the side walls and bottom of the tank. Pressure gauges are located in the upper, middle, and lower parts of the tank. This utility model has a simple and reasonable structure, is easy to install and use, has good cleaning effect, is fast, and does not easily leave dirt residue, effectively improving work efficiency.

[0009] However, the two documents mentioned above still contain the issue of needing to stop the machine during cleaning. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a sewage filtration system to solve the problem of needing to stop the backwash tank during backwashing.

[0011] To solve the above problems, the present invention adopts the following technical solution:

[0012] A wastewater filtration system includes an inlet pipe and an outlet pipe, with at least two filter tanks connected in parallel between the inlet pipe and the outlet pipe. The upper end of each filter tank is provided with an inlet pipe connected to the inlet pipe, and the lower end of each filter tank is provided with an outlet pipe connected to the outlet pipe. A drain pipe is provided on one side of the inlet pipe at the upper end of each filter tank. Both the inlet pipe and the outlet pipe are provided with three-way valves, and the three-way valves on the same filter tank are connected in a bypass manner.

[0013] Furthermore, a bottom filter screen is installed inside the filter tank, on which a quartz sand filter layer is installed. An agitation mechanism is installed inside the filter tank on the quartz sand filter layer to level the quartz sand filter layer.

[0014] Furthermore, the mixing mechanism includes a fixed component disposed above the quartz sand filter layer and a mixing component rotatably connected below the fixed component. The mixing component has a conical frame structure and includes a rotating column rotatably connected to the fixed component and a fixed ring disposed below the rotating column. The rotating column and the fixed ring are connected by inclined tie rods, and the number of tie rods is at least three. A horizontal scraper is disposed inside the fixed ring, and the fixed ring is located inside the quartz sand filter layer.

[0015] Furthermore, each tie rod is equipped with a deflector plate that is tilted in one direction.

[0016] Furthermore, the fixing component includes an upper filter screen horizontally arranged inside the filter tank, a cylindrical connecting column at the bottom center of the upper filter screen, a rotating column rotatably connected inside the connecting column, and a long strip protrusion on the inner wall of the connecting column that connects to the outer side of the rotating column. The number of the long strip protrusions is at least three and they are evenly distributed inside the connecting column.

[0017] Furthermore, a nylon rope is provided at the bottom of the upper filter screen inside the connecting column. The end of the nylon rope away from the upper filter screen is connected to the rotating column, and the connecting column is threadedly connected to the center of the bottom of the upper filter screen.

[0018] Furthermore, both the upper and lower filter screens are detachably connected to the filter tank.

[0019] Furthermore, the filter tank is equipped with two distributors that are respectively connected to the inlet pipe and the outlet pipe.

[0020] The significant beneficial effects achieved by this utility model are as follows:

[0021] 1. This application features at least two filter tanks connected in parallel between the inlet and outlet water pipes. Each filter tank is equipped with a three-way valve to switch the connection between the inlet and outlet water pipes and the filter tanks. The filter tanks can be cleaned sequentially without downtime. This design is convenient to operate and effectively solves the problem of downtime required for backwashing tanks during backwashing.

[0022] 2. The agitation mechanism allows the backwashed quartz sand filter layer to become smooth again, achieving the best filtration effect. At the same time, the agitation mechanism can further improve the backwashing effect by stirring the quartz sand during the backwashing process, which can better separate impurities from the quartz sand.

[0023] 3. The nylon rope allows the rotating column to have a certain amount of room to move within the connecting column without opening it. When leveling the quartz sand filter layer, leveling can be done from top to bottom, reducing resistance during leveling. Attached Figure Description

[0024] Appendix Figure 1 This is a schematic diagram of the main structure of this utility model;

[0025] Appendix Figure 2 This is a schematic diagram of the stirring mechanism in this utility model;

[0026] Appendix Figure 3 This is a schematic cross-sectional view of the connecting column in this utility model;

[0027] Appendix Figure 4 This is a cross-sectional view of the filter tank in this utility model;

[0028] Appendix Figure 5This is a top view of the stirring mechanism in this utility model;

[0029] Appendix Figure 6 This is a side view of the tie rod in the horizontal state of this utility model.

[0030] In the attached diagram, 1. Inlet pipe; 2. Outlet pipe; 3. Filter tank; 4. Inlet pipe; 5. Outlet pipe; 6. Drain pipe; 7. Three-way valve; 8. Bottom filter screen; 9. Quartz sand filter layer; 10. Rotating column; 11. Fixing ring; 12. Tie rod; 13. Guide plate; 14. Upper filter screen; 15. Connecting column; 16. Long strip protrusion; 17. Nylon rope; 18. Distributor; 19. Scraper. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] Example 1

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, a wastewater filtration system includes an inlet pipe 1 and an outlet pipe 2. At least two filter tanks 3 are connected in parallel between the inlet pipe 1 and the outlet pipe 2. In this embodiment, there are three filter tanks 3. Each filter tank 3 has an inlet pipe 4 connected to the inlet pipe 1 installed at its upper end, and an outlet pipe 5 connected to the outlet pipe 2 installed at its lower end. A drain pipe 6 located on one side of the inlet pipe 4 is installed at the upper end of the filter tank 3. An electric ball valve is installed on the drain pipe 6, which is used to connect to the outlet pipe 2. A three-way valve 7 is installed on both the inlet pipe 4 and the outlet pipe 5. The three-way valve 7 located on the same filter tank 3 is connected in a bypass manner.

[0034] Specifically, all three filter tanks 3 are fixedly connected to the base. The inlet pipe 1 is located above the filter tank 3 and is connected to the inlet pipe 4 in the filter tank 3. The outlet pipe 2 is located below the filter tank 3 and is connected to the outlet pipe 5 in the filter tank 3. The three-way valve 7 on the same filter tank 3 is connected to the bypass pipe. The other end of the electric ball valve installed on the drain pipe 6 is connected to the drain pipe 6 through a pipe.

[0035] The filter tank 3 is equipped with two distributors 18 that are respectively connected to the inlet pipe 4 and the outlet pipe 5. The distributors 18 are designed to make the water flow through the quartz sand filter layer 9 more comprehensive and stable.

[0036] Working principle: During normal filtration, the three-way valve 7 on the inlet pipe 4 of the three filter tanks 3 is operated to connect the inlet pipe 1 to the filter tank 3. The three-way valve 7 on the outlet pipe 5 of the three filter tanks 3 is operated to connect the filter tank 3 to the outlet pipe 2. At this time, the water entering the filter tank 3 through the inlet pipe 1 can be discharged through the outlet pipe 2. The pipeline between the two three-way valves in the same filter tank 3 is closed.

[0037] When backwashing is required for filter tank 3, one or two three-way valves 7 in filter tank 3 can be operated to connect the bypass between the three-way valves 7. At this time, the water inlet pipe 1 is connected to the filter tank 3 through the water outlet pipe 5. Open the electric ball valve on the drain pipe 6. With the continuous water inlet pipe 1, the water flow washes the quartz sand filter layer from below. Under the impact of the water flow, the gaps between the quartz sand in the quartz sand filter layer 9 become larger. The impurities blocked by the quartz sand are discharged from the drain pipe 6 under the drive of the water flow. After rinsing for a period of time or after observing that there are no obvious impurities in the water discharged from the drain pipe 6, the rinsing is over.

[0038] Close the bypass between the two three-way valves 7 on filter tank 3, and operate the three-way valve 7 on filter tank 3 to reconnect the inlet pipe 1 to the outlet pipe 2 through filter tank 3; then repeat the above operation to backwash filter tank 3 that has not been backwashed.

[0039] During the backwashing process of filter tank 3, one or two filter tanks 3 are always connected between the inlet pipe 1 and the drain pipe 6. Although the flow rate is reduced, the machine will not stop and the progress will not be affected.

[0040] In summary, this application addresses the issue of having at least two filter tanks 3 connected in parallel between the inlet pipe 1 and the outlet pipe 2. Each filter tank 3 is equipped with a three-way valve 7 to switch the connection between the inlet pipe 1, the outlet pipe 2, and the filter tank 3. Furthermore, the filter tanks 3 can be cleaned sequentially without causing downtime. This approach is convenient to operate and effectively solves the problem of needing to stop the current backwashing tank during backwashing.

[0041] Example 2

[0042] like Figures 1-6 As shown, the structure of this embodiment is roughly the same as that of embodiment 1. This embodiment is further optimized based on embodiment 1. When backwashing the quartz sand filter layer 9, the quartz sand in the quartz sand filter layer 9 will surge upward. After backwashing, due to the surge of quartz sand, the surface of the quartz sand filter layer 9 will be uneven, resulting in uneven filtration of the quartz sand filter layer 9, reduced filtration effect, and increased burden on subsequent filtration devices.

[0043] Therefore, in this embodiment, a bottom filter screen 8 is installed inside the filter tank 3, and a quartz sand filter layer 9 is located on the bottom filter screen 8. A stirring mechanism is installed on the quartz sand filter layer 9 in the filter tank 3. The stirring mechanism is used to scrape the quartz sand filter layer 9 flat.

[0044] Specifically, the mixing mechanism includes a fixed component installed above the quartz sand filter layer 9 and a mixing component rotatably connected below the fixed component. The mixing component has a conical frame structure and includes a rotating column 10 rotatably connected to the fixed component and a fixed ring 11 located below the rotating column 10. The rotating column 10 and the fixed ring 11 are connected by an inclined tie rod 12. The number of tie rods 12 is at least three. A horizontal scraper 19 is fixedly installed inside the fixed ring 11. The fixed ring 11 is located inside the quartz sand filter layer 9.

[0045] The scraper 19 inside the fixing ring 11 is used to smooth the uneven surface of the quartz sand filter layer 9.

[0046] When the quartz sand filter layer 9 is leveled, the fixing ring 11 penetrates 1-3 cm into the quartz sand filter layer 9. At the same time, the flow rate is set according to the fixing ring 11 so that the fixing ring 11 and the scraper 19 can both level the quartz sand filter layer 9 and prevent it from being moved by the water flow after the quartz sand filter layer 9 is leveled. When it is necessary to level the quartz sand filter layer 9, the flow rate of the filter tank 3 can be increased, and after leveling, it returns to the appropriate flow rate to prevent the fixing ring 11 and the scraper 19 from continuing to rotate.

[0047] Each of the tie rods 12 has a guide plate 13 that is tilted to one side.

[0048] The fixing component includes an upper filter screen 14 horizontally installed inside the filter tank 3. A cylindrical connecting column 15 is installed at the bottom center of the upper filter screen 14. A rotating column 10 is rotatably connected inside the connecting column 15. An elongated protrusion 16 connected to the outer side of the rotating column 10 is installed on the inner wall of the connecting column 15. There are at least three elongated protrusions 16, which are evenly distributed inside the connecting column 15. The elongated protrusions 16 are arc-shaped protrusions.

[0049] In this embodiment, the upper end of the rotating column 10 is conical. The conical shape of the upper end of the rotating column 10 can prevent the accumulation of quartz sand, which would affect the rotation of the rotating column 10. The long strip protrusion 16 can reduce the friction between the rotating column 10 and the connecting column 15.

[0050] In this embodiment, the stirring mechanism installed in the stirring tank can level the uneven surface of the quartz sand filter layer 9 after it has surged, which can ensure that the filtration effect reaches the best. Secondly, the stirring mechanism can also stir the quartz sand that has surged up during the backwashing process, so that the impurities between the quartz sand can be smoothly removed.

[0051] Example 3

[0052] like Figures 1-6 As shown, the structure of this embodiment is roughly the same as that of embodiment 2. This embodiment is further optimized based on embodiment 2. In this embodiment, in order to facilitate the maintenance of the filter tank 3, a nylon rope 17 located in the connecting column 15 is installed at the bottom of the upper filter screen 14. The end of the nylon rope 17 away from the upper filter screen 14 is connected to the rotating column 10. The connecting column 15 is threadedly connected to the bottom center of the upper filter screen 14.

[0053] Specifically, both the upper filter screen 14 and the lower filter screen 8 are mesh plates. The pore size of both the upper filter screen 14 and the lower filter screen 8 is smaller than the particle size of the quartz sand. A connecting sleeve is fixedly installed at the bottom center of the upper filter screen 14. The outer circumferential surface of the connecting sleeve is threaded. A hanging ring for connecting to the nylon rope 17 is provided inside the connecting sleeve. The connecting column 15 is threaded onto the connecting sleeve. A hanging ring for connecting to the nylon rope 17 is provided at the upper end of the rotating column 10.

[0054] The nylon rope 17 allows for easy disassembly of the upper filter screen 14 and the rotating column 10, while also providing the rotating column 10 with sufficient space to rise and fall, enabling it to rotate better under the action of water flow. When leveling the quartz sand filter layer 9, it can also be leveled by gradually descending from a high position, reducing the resistance encountered during leveling.

[0055] Two sets of ring-shaped connecting ears are installed on the inner wall of the filter tank 3. The two sets of connecting ears are connected to the upper filter screen 14 and the lower filter screen 8 respectively. Each set of connecting ears has at least three connecting ears. When installing the lower filter screen 8, the edge is folded up and connected to the lower connecting ear through the upper connecting ear. The upper filter screen 14 is connected to the upper connecting ear.

Claims

1. A wastewater filtration system, comprising an inlet pipe (1) and an outlet pipe (2), characterized in that: At least two filter tanks (3) are connected in parallel between the water inlet pipe (1) and the water outlet pipe (2). The upper end of the filter tank (3) is provided with a water inlet pipe (4) connected to the water inlet pipe (1), and the lower end of the filter tank (3) is provided with a water outlet pipe (5) connected to the water outlet pipe (2). The upper end of the filter tank (3) is provided with a drain pipe (6) located on one side of the water inlet pipe (4). Both the water inlet pipe (4) and the water outlet pipe (5) are provided with three-way valves (7), and the three-way valves (7) located on the same filter tank (3) are connected by a bypass.

2. The wastewater filtration system according to claim 1, characterized in that: The filter tank (3) is provided with a bottom filter screen (8), and a quartz sand filter layer (9) is provided on the bottom filter screen (8). A stirring mechanism is provided in the filter tank (3) on the quartz sand filter layer (9) to level the quartz sand filter layer (9).

3. The wastewater filtration system according to claim 2, characterized in that: The stirring mechanism includes a fixing member disposed above the quartz sand filter layer (9) and a stirring member rotatably connected below the fixing member. The stirring member has a conical frame structure. The stirring member includes a rotating column (10) rotatably connected to the fixing member and a fixing ring (11) disposed below the rotating column (10). The rotating column (10) and the fixing ring (11) are connected by inclined tie rods (12). The number of tie rods (12) is at least three. A horizontal scraper (19) is disposed inside the fixing ring (11). The fixing ring (11) is located inside the quartz sand filter layer (9).

4. A wastewater filtration system according to claim 3, characterized in that: Each of the pull rods (12) is equipped with a guide plate (13) that is inclined in one direction.

5. A wastewater filtration system according to claim 3, characterized in that: The fixing component includes an upper filter screen (14) horizontally arranged inside the filter tank (3). A cylindrical connecting column (15) is provided at the bottom center of the upper filter screen (14). The rotating column (10) is rotatably connected inside the connecting column (15). The inner wall of the connecting column (15) is provided with a long strip protrusion (16) that connects to the outside of the rotating column (10). The number of the long strip protrusions (16) is at least three and they are evenly distributed inside the connecting column (15).

6. A wastewater filtration system according to claim 5, characterized in that: The bottom of the upper filter screen (14) is provided with a nylon rope (17) located inside the connecting post (15). The end of the nylon rope (17) away from the upper filter screen (14) is connected to the rotating post (10). The connecting post (15) is threadedly connected to the bottom center of the upper filter screen (14).

7. A wastewater filtration system according to claim 6, characterized in that: Both the upper filter (14) and the lower filter (8) are detachably connected to the filter tank (3).

8. A wastewater filtration system according to claim 1, characterized in that: The filter tank (3) is equipped with two distributors (18) that are respectively connected to the water inlet pipe (4) and the water outlet pipe (5).

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