Sedimentation tank for industrial wastewater treatment

Abstract

The utility model discloses a sedimentation tank for industrial wastewater treatment, and solves the problems that a sedimentation tank in the prior art is inconvenient to clean and the sedimentation effect is influenced. The sewage treatment device comprises a tank body, an upper suspension tank is detachably connected in the tank body, a buffer area and a sludge removal assembly corresponding to the buffer area are arranged on the lower portion of the tank body, and a filter assembly is installed on the upper portion of the tank body and located in the upper suspension tank. According to the utility model, the upper suspension tank is arranged in the sedimentation tank, wastewater flows from the lower part of the sedimentation tank to be settled and then enters the upper suspension tank again to be settled, the structure is simple, the installation is convenient, the standing time of water in the sedimentation tank in the tank is prolonged by the upper suspension tank, the sedimentation effect is improved, and meanwhile, the occupied area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a sedimentation tank for industrial wastewater treatment. Background Technique

[0002] High-COD, high-ammonia-nitrogen and high-salt wastewater is an inevitable pollutant in industrial production. It has a wide range of sources, complex characteristics and extremely difficult treatment. High-COD wastewater mainly comes from the chemical industry. As a traditional industry in China, it occupies an important position in the national economy. However, with the development of the chemical industry, the ecological environment has been severely affected. The chemical wastewater produced has a high COD concentration, high toxicity and poor biodegradability. When treating industrial wastewater with high COD, high ammonia nitrogen and high salt, it is crucial to adopt appropriate treatment technologies. Such wastewater contains a high concentration of organic matter, and the types and chemical properties vary greatly. The content of salt substances in the wastewater is relatively high, mainly including Cl - , SO 4 2- , Na + , Ca 2+ and other salt substances. In addition, the content of ammonia nitrogen in the wastewater is also very high, which requires special attention to the removal of ammonia nitrogen during the wastewater treatment process. These characteristics greatly increase the difficulty of treating high-salt, high-COD and high-ammonia-nitrogen wastewater.

[0003] For the treatment of high-salt, high-COD and high-ammonia-nitrogen wastewater, process flows such as pretreatment, physicochemical treatment, biological treatment, advanced oxidation and desalination treatment are usually adopted. Flocculation and sedimentation are essential methods for removing high-COD, high-ammonia-nitrogen and high-salt industrial wastewater. A flocculant is used to help organic matter and particulate matter aggregate together to form larger particulate matter, and then a sedimentation tank is used to settle them. Sedimentation is one of the most basic methods in water treatment. It utilizes the sedimentation performance of suspended particles in water to sink under the action of the gravity field to achieve a process of solid-liquid separation.

[0004] Existing sedimentation tanks are widely used in wastewater treatment. Due to insufficient residence time of the sedimentation water flow, the wastewater flowing out of the water flow still contains sediment. During the use of the sedimentation tank, to avoid insufficient sedimentation time, multiple sedimentation tanks need to be installed and used in combination for flocculent sedimentation of wastewater. Although the sedimentation effect is improved, the floor area is large, and the combined use of multiple sedimentation tanks is required to ensure the sedimentation effect, and the usage method is complex. Content of the Utility Model

[0005] In view of the deficiencies in the above background technique, the utility model proposes a sedimentation tank for industrial wastewater treatment, which solves the problem of poor sedimentation effect caused by insufficient residence time of water flow in the sedimentation tank in the prior art.

[0006] The technical solution of the present utility model is realized as follows: A sedimentation tank for industrial wastewater treatment includes a tank body, in which a suspended tank is detachably connected. A buffer zone and a sludge removal component corresponding to the buffer zone are provided at the lower part of the tank body, and a filtering component is installed at the upper part of the tank body, and the filtering component is located in the suspended tank.

[0007] Further, a water inlet pipe and a water outlet pipe are provided on the side wall of the tank body. The water outlet end of the water inlet pipe is located inside the suspended tank, and the water inlet end of the water inlet pipe is located outside the suspended tank.

[0008] Further, the suspended tank is of an L-shaped structure, and a water outlet corresponding to the sludge removal component is provided on the L-shaped structure.

[0009] Further, a grid baffle is installed in the suspended tank.

[0010] Further, the buffer zone is an inclined buffer bottom plate.

[0011] Further, a sludge trough cooperating with the sludge removal component is provided at one end of the buffer bottom plate.

[0012] Further, the sludge removal component includes a rotating shaft, the rotating shaft is rotatably arranged in the sludge trough, a spiral blade is provided on the rotating shaft, and the rotating shaft passes through the sludge trough and is connected to a driving member arranged on the outer wall.

[0013] Further, the driving member is a driving motor, and a mechanical seal cooperating with the rotating shaft is installed at the output end of the driving motor.

[0014] Further, the filtering component includes at least one filtering plate. One end of the filtering plate is connected with a U-shaped clamping plate that is clamped and matched with the side wall of the tank body. The other end of the filtering plate is clamped in a groove on the tank body, and a limiting plate cooperating with the groove is further provided at the end of the filtering plate.

[0015] Further, the filtering plate includes a bottom plate, a first side plate and a second side plate. The first side plate and the second side plate are respectively connected to both sides of the bottom plate and are connected into a U-shaped structure, and the height of the first side plate is lower than the height of the second side plate.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The present utility model installs a suspended tank in the sedimentation tank. After the wastewater flows and precipitates from the lower part of the sedimentation tank, it enters the suspended tank again for precipitation. The structure is simple and the installation is convenient. The suspended tank increases the residence time of the water in the sedimentation tank, improves the precipitation effect, and also reduces the land area.

[0018] 2. The water inlet pipe is located outside the upper suspension tank, and the water outlet pipe is located inside the upper suspension tank, ensuring that the water flow first passes through the tank body for the first stage of sedimentation and then enters the upper suspension tank for secondary sedimentation, resulting in good sedimentation effect. Moreover, the upper suspension tank is detachably connected to the tank body, facilitating the cleaning of the upper suspension tank and the tank body.

[0019] 3. The buffer zone at the lower part of the tank body is a buffer bottom plate with an inclined setting, facilitating the downward settlement of the wastewater sediment and allowing it to reach the sludge tank along the water flow direction for discharge through the sludge removal component. The grid baffle is used to prevent the settled sediment from floating up to the upper suspension tank along with the water flow.

[0020] 4. The sludge removal component is located in the sludge tank and uses a spiral conveyor blade for transportation, which can prevent sludge accumulation and also avoid the floating of sludge sediment along with the water flow within a certain range.

[0021] 5. The wastewater enters the upper suspension tank from the tank body, causing the wastewater to oscillate sufficiently. The filtering component is used to remove the floating substances in the sedimentation tank, facilitating the next step of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a top view of the present invention.

[0024] Figure 2 It is a side view of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the filtering component.

[0026] In the figure: 1. Water inlet pipe, 2. Tank body, 3. Upper suspension tank, 4. Water outlet pipe, 5. Drainage tank, 6. Rotating shaft, 7. Spiral blade, 8. Driving member, 9. Sludge pipe, 10. Sludge tank, 11. Buffer bottom plate, 12. Water outlet, 13. Grid baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] Such as Figures 1 to 3As shown in the figure, in Embodiment 1, a sedimentation tank for industrial wastewater treatment includes a tank body 2. An upper suspended tank 3 is detachably connected inside the tank body 2. A buffer zone and a sludge removal component corresponding to the buffer zone are provided at the lower part of the tank body 2. A filtering component is installed at the upper part of the tank body 2, and the filtering component is located inside the upper suspended tank 3. An upper suspended tank 3 is installed in the sedimentation tank. After the wastewater flows and precipitates from the lower part of the sedimentation tank, it enters the upper suspended tank 3 again for precipitation. The wastewater enters the upper suspended tank 3 from the tank body 2, causing the wastewater to oscillate fully. The filtering component is used to remove the floating substances in the sedimentation tank, further ensuring that the wastewater discharged from the sedimentation tank contains no or less sediment or floating residues, facilitating the next-step wastewater treatment. The structure is simple and the installation is convenient. The upper suspended tank 3 increases the residence time of the water in the sedimentation tank, improves the sedimentation effect, and also reduces the land area. It is applicable to large, medium and small sewage treatment plants or areas with relatively high groundwater level and poor geology.

[0029] In this embodiment, a water inlet pipe 1 and a water outlet pipe 4 are provided on the side wall of the tank body 2. The water outlet end of the water inlet pipe 1 is located inside the upper suspended tank 3, and the water inlet end of the water inlet pipe 1 is located outside the upper suspended tank 3. The water outlet end of the water inlet pipe 1 is located inside the upper suspended tank 3, and the water inlet end of the water outlet pipe 4 is located inside the upper suspended tank 3, ensuring that the water flow first undergoes the first-step precipitation in the tank body 2 and then enters the upper suspended tank 3 for secondary precipitation. The sedimentation effect is good, and the upper suspended tank 3 is detachably connected to the tank body 2, facilitating the cleaning of the upper suspended tank 3 and the tank body 2. The upper suspended tank 3 is of an L-shaped structure, and a water outlet 12 corresponding to the sludge removal component is provided on the L-shaped structure. An installation plate is provided at the upper part of the L-shaped structure, and the installation plate is fixed to the tank body 2 by screws. When cleaning the sedimentation tank, only the screws need to be removed to remove the upper suspended tank 3, facilitating the cleaning work of the sedimentation tank. A baffle 13 is installed inside the upper suspended tank 3. The wastewater entering the sedimentation tank flows into the side of the upper suspended tank 3 close to the baffle 13 from the water outlet 12. The L-shaped structure and the baffle 13 form an inner tank. Under the state of water pressure balance, the water flow enters the inner tank and then flows out from the water outlet 12. The baffle 13 is used to prevent the suspended sediment generated during the sludge removal process of the sludge removal component from entering the upper suspended tank 3 from the water outlet 12. The L-shaped structure is installed inside the tank body 2, which can increase the flow time of the wastewater in the water tank, control the flow rate of the wastewater in the sedimentation tank and the residence time of the wastewater in the tank, improve the sedimentation effect, and reduce the land area.

[0030] In this embodiment, the buffer is a buffer bottom plate 11 arranged obliquely. One end of the buffer bottom plate 11 is provided with a silt tank 10 that cooperates with the silt removal component. The buffer area at the lower part of the pool body 2 is the buffer bottom plate 11 arranged obliquely, which is convenient for the wastewater sediment to settle downward and reach the silt tank 10 along the water flow direction and be discharged through the silt removal component. The baffle 13 is used to prevent the settled sediment from floating up to the upper suspension pool 3 along with the water flow. One end of the buffer bottom plate 11 close to the water inlet pipe 1 is higher than the side where the silt removal component is installed, which is convenient for the wastewater containing sediment to sink and then fall into the silt tank 10 along with the water flow, avoiding the situation where sediment accumulates and is not easy to clean up.

[0031] As Figures 1 to 3 shown, in Embodiment 2, a sedimentation tank for industrial wastewater treatment, the silt removal component includes a rotating shaft 6. The rotating shaft 6 is rotatably arranged in the silt tank 10. A spiral blade 7 is provided on the rotating shaft 6. The rotating shaft 6 passes through the silt tank 10 and is connected to a driving member 8 arranged on the outer wall. Both ends of the rotating shaft 6 are rotatably connected in the silt tank 10. The rotating shaft 6 passes through the silt tank 10 and is connected to a driving motor. The driving member 8 is a driving motor. A mechanical seal cooperating with the rotating shaft 6 is installed at the output end of the driving motor. The mechanical seal is used to ensure that silt does not leak out from the rotating shaft 6 when the rotating shaft 6 rotates. The silt removal component is located in the silt tank 10 and uses a spiral conveyor blade for conveying, which can avoid silt accumulation and also avoid silt sediment floating up along with the water flow within a certain range. The feeding end of the spiral blade 7 is at the lower part of the buffer bottom plate 11. A silt pipeline 9 is provided at the discharging end of the spiral blade 7. The spiral blade 7 discharges the silt from the silt pipeline 9, avoiding the sediment clogging at the bottom of the sedimentation tank and affecting the sedimentation effect.

[0032] In this embodiment, the filtering component includes at least one filter plate. One end of the filter plate is connected with a U-shaped clamping plate 14 that is clamped and matched with the side wall of the pool body 2. The other end of the filter plate is clamped in a groove on the pool body 2, and a limiting plate 15 cooperating with the groove is further provided at the end of the filter plate. The U-shaped clamping plate 14 and the limiting plate 15 cooperate to install the filtering component in the sedimentation tank for removing the sediment in the wastewater. The filter plate includes a bottom plate 16, a first side plate 17 and a second side plate 18. The first side plate 17 and the second side plate 18 are respectively connected to both sides of the bottom plate 16 and connected into a U-shaped structure, and the height of the first side plate 17 is lower than that of the second side plate 18. The filter plate is installed on the pool body 2. The height of the first side plate 17 is 0.5 - 3 cm lower than the wastewater surface, which is convenient for the sediment in the wastewater to enter the filter plate. The water outlet end of the filter plate cooperates with a sewage discharge groove 5 installed on the side wall of the sedimentation tank to discharge the floating matter. The second side plate 18 is 10 - 20 cm higher than the water surface and higher than the height of the water outlet pipe 4, avoiding all the water in the wastewater pool flowing out from the filter plate.

[0033] All other structures are the same as those in Embodiment 1.

[0034] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sedimentation tank for industrial wastewater treatment, characterized in that: The invention comprises a tank body (2), an upper suspension tank (3) being detachably connected to the tank body (2), a buffer zone and a sludge removal component corresponding to the buffer zone being provided at the lower part of the tank body (2), a filter component being installed at the upper part of the tank body (2), and the filter component being located in the upper suspension tank (3); A baffle (13) is installed in the upper suspension pool (3); The buffer zone is a buffer bottom plate (11) arranged obliquely.

2. The sedimentation tank for industrial wastewater treatment according to claim 1, characterized in that: A water inlet pipe (1) and a water outlet pipe (4) are provided on the side wall of the pool body (2); the water outlet end of the water inlet pipe (1) is located inside the upper suspended pool (3), and the water inlet end of the water inlet pipe (1) is located outside the upper suspended pool (3).

3. The sedimentation tank for industrial wastewater treatment according to claim 1 or 2, characterized in that: The upper hanging pool (3) is an L-shaped structure, and a water outlet (12) corresponding to the sludge removal component is provided on the L-shaped structure.

4. The sedimentation tank for industrial wastewater treatment according to claim 3, characterized in that: One end of the buffer bottom plate (11) is provided with a sludge groove (10) that cooperates with the sludge removal assembly.

5. The sedimentation tank for industrial wastewater treatment according to claim 4, characterized in that: The sludge removal assembly comprises a rotating shaft (6), the rotating shaft (6) being rotatably arranged in the sludge trough (10), a spiral blade (7) being arranged on the rotating shaft (6), and the rotating shaft (6) passing through the sludge trough (10) and being connected to a driving member (8) arranged on the outer wall.

6. The sedimentation tank for industrial wastewater treatment according to claim 5, characterized in that: The driving member (8) is a driving motor, and a mechanical seal that cooperates with the rotating shaft (6) is installed at the output end of the driving motor.

7. The sedimentation tank for industrial wastewater treatment according to claim 6, characterized in that: The filter assembly comprises at least one filter plate, one end of the filter plate is connected to a U-shaped clamping plate (14) that is clamped with the side wall of the pool body (2), the other end of the filter plate is clamped in a groove on the pool body (2), and the end of the filter plate is also provided with a limit plate (15) that is matched with the groove.

8. The sedimentation tank for industrial wastewater treatment according to claim 7, characterized in that: The filter plate comprises a bottom plate (16), a first side plate (17) and a second side plate (18); the first side plate (17) and the second side plate (18) are respectively connected to two sides of the bottom plate (16) and connected to form a U-shaped structure; and the height of the first side plate (17) is lower than the height of the second side plate (18).

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