A wastewater treatment device for chlorinated amine production

Abstract

This utility model relates to a wastewater treatment device for chloroamine production, belonging to the field of wastewater treatment technology. It includes a treatment tower with a dividing funnel in the upper middle part that separates it into an upper aerobic zone and a lower anoxic zone. The upper aerobic zone contains multiple fluidized bed packings, and an effluent weir is located at the top of the upper aerobic zone. An overflow pipe is located on the outer side of the bottom of the effluent weir on the treatment tower, connecting to the lower anoxic zone. The lower anoxic zone consists of a biological packing layer, a filter layer, and a filter plate from top to bottom. An effluent pipe is located at the bottom of the treatment tower. This utility model integrates the upper aerobic zone and the lower anoxic zone vertically within the treatment tower, significantly saving floor space. After entering the treatment tower, the wastewater first undergoes nitrification in the upper aerobic zone under aeration, and then overflows through the effluent weir into the lower anoxic zone, where denitrification occurs due to the anaerobic bacteria on the biological packing layer. This ensures more thorough contact between microorganisms and water, resulting in higher wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to a wastewater treatment device for chloroamine production, belonging to the field of wastewater treatment technology. Background Technology

[0002] Wastewater from chloroamine production contains chloroamines and their derivatives, unreacted raw materials, and reaction byproducts. Biological treatment is a common method for treating this wastewater. It involves feeding the wastewater into a pretreatment tank where sedimentation and filtration occur. The supernatant is then pumped into a hydrolysis and acidification tank, where large organic molecules are hydrolyzed and acidified, transforming them into smaller organic molecules. After pretreatment, the wastewater is then fed into a biological treatment unit. However, existing biological treatment units suffer from insufficient contact between microorganisms and wastewater, resulting in low treatment efficiency; furthermore, these units require a large footprint. Utility Model Content

[0003] This invention provides a wastewater treatment device for chloroamine production, which solves the problems existing in the background art.

[0004] This utility model relates to a wastewater treatment device for chloroamine production, including a treatment tower. The upper part of the treatment tower is provided with a dividing funnel that divides it into an upper aerobic zone and a lower anoxic zone. The upper aerobic zone is connected to an inlet pipe. Two guide plates symmetrical about the center line are provided in the upper aerobic zone. The guide plates are inclined with the outer side lower and the inner side higher. An aeration pipe is provided at the lower part between the two guide plates. Multiple fluidized packing materials are provided in the upper aerobic zone. An effluent weir is provided at the upper part of the upper aerobic zone. An overflow pipe is provided on the treatment tower outside the bottom of the effluent weir. The overflow pipe connects to the lower anoxic zone. The lower anoxic zone is provided with a biological packing layer, a filter layer and a filter plate from top to bottom. An effluent pipe is provided at the bottom of the treatment tower.

[0005] As a preferred embodiment, the effluent weir includes a support ring plate fixed to the upper part of the treatment tower. An overflow cylinder is provided in the inner hole of the support ring plate. A conical guide net is fixed to the bottom of the overflow cylinder. The guide net can prevent the fluidized packing from entering the overflow cylinder and can guide the fluidized packing, so that the fluidized packing can flow better to both sides of the guide plate for backflow. A drain pipe is fixed to the bottom of the dividing funnel for convenient sewage discharge.

[0006] As a preferred embodiment, a water distribution weir is fixed to the inner wall of the treatment tower at the upper part of the lower anoxic zone, and an overflow pipe is connected to the treatment tower outside the water distribution weir. The water distribution weir allows the wastewater entering the lower anoxic zone through the overflow pipe to be distributed more evenly.

[0007] As a preferred option, the treatment tower outside the distribution weir is also equipped with a backwash outlet pipe, and the lower part of the treatment tower is fixed with a backwash water inlet pipe and a backwash air inlet pipe. The biological packing layer and filter layer can be backwashed by backwashing air and water intake to restore the treatment effect.

[0008] As a preferred option, the bottom outer side of the overflow cylinder is fixed with an installation flange, which is fixed to the support ring plate by bolts, so that the overflow cylinder can be easily removed and the fluidizing packing can be filled and replaced.

[0009] As a preferred embodiment, the filter plate is evenly provided with filter holes, and each filter hole is provided with a distribution tube. The bottom of the distribution tube passes through the filter plate and is connected to a locking nut. The top of the distribution tube passes through the filter plate and is fixedly connected to a hemispherical distribution ball. The distribution ball is evenly provided with distribution holes, which makes the water and air distribution more uniform, the flow area larger, and better prevents clogging.

[0010] As a preferred embodiment, the treatment tower has a multi-section structure, with adjacent sections fixedly connected by connecting flanges. Sealing gaskets are provided at the connecting flanges. The top of the treatment tower has an open structure, and the bottom of the treatment tower is funnel-shaped, with the outlet pipe located in the middle of the bottom of the treatment tower.

[0011] This utility model has the following beneficial effects:

[0012] The treatment tower is vertically integrated with an upper aerobic zone and a lower anoxic zone, which can greatly save the floor space. After the wastewater enters the treatment tower, it first undergoes nitrification in the upper aerobic zone under aeration. Then, it overflows through the effluent weir into the lower anoxic zone, where the anoxic bacteria on the biological packing layer undergo denitrification. The microorganisms have more sufficient contact with the water, resulting in higher wastewater treatment efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0014] Figure 2 for Figure 1 Partial structural diagram Figure 1 ;

[0015] Figure 3 for Figure 1 Partial structural diagram Figure 2 ;

[0016] Figure 4 for Figure 1 Enlarged structural diagram at point A;

[0017] In the diagram: 1. Treatment tower; 2. Inlet pipe; 3. Dividing funnel; 4. Backwash outlet pipe; 5. Distribution weir; 6. Fluidized packing; 7. Guide plate; 8. Overflow pipe; 9. Support ring plate; 10. Overflow cylinder; 11. Aeration pipe; 12. Sewage pipe; 13. Biological packing layer; 14. Filter layer; 15. Filter plate; 16. Backwash air inlet pipe; 17. Backwash water inlet pipe; 18. Outlet pipe; 19. Distribution pipe; 20. Distribution ball; 21. Locking nut; 22. Guide net. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example 1, such as Figures 1 to 4 As shown, this utility model is a wastewater treatment device for chloroamine production, including a treatment tower 1. The upper part of the treatment tower 1 is equipped with a dividing funnel 3 that divides it into an upper aerobic zone and a lower anoxic zone. The upper aerobic zone is connected to an inlet pipe 2. Two symmetrical guide plates 7 about the center line are installed in the upper aerobic zone. The guide plates 7 are inclined with the outer side lower than the inner side. An aeration pipe 11 is installed at the lower part between the two guide plates 7. Multiple fluidized packing materials 6 are installed in the upper aerobic zone. The fluidized packing materials 6 can be suspended in the water. The treatment tower 1 is mostly filled with aerobic bacteria, with a small portion being anaerobic bacteria. The upper aerobic zone is equipped with an outlet weir, and an overflow pipe 8 is installed on the outer side of the bottom of the outlet weir on the treatment tower 1. The overflow pipe 8 connects to the lower anaerobic zone. The lower anaerobic zone consists of a biological packing layer 13, a filter layer 14, and a filter plate 15 from top to bottom. The upper one-fifth of the biological packing layer 13 is filled with aerobic and anaerobic bacteria or only aerobic bacteria, while the remaining lower biological packing layer 13 is filled with anaerobic bacteria. An outlet pipe 18 is installed at the bottom of the treatment tower 1.

[0020] During operation, the raw water to be treated enters the lower part of the upper aerobic zone through the inlet pipe 2. Utilizing the force generated by the water entering through the inlet pipe 2 and the gas force generated by the aeration pipe 11, the raw water moves upward between the two guide plates 7. Simultaneously, the aerobic bacteria on the fluidized packing 6 undergo nitrification with the raw water. A portion of the raw water flows to the outside of the guide plates 7, where oxygen levels continuously decrease. At this point, the anoxic bacteria on the fluidized packing 6 begin to work, undergoing denitrification with the raw water. Because there is no water or oxygen force acting on the outside of the guide plates 7, the water... The water begins to move downwards, passing through the lower end of the guide plate 7 and re-entering the area between the two guide plates 7. Another part of the raw water enters the overflow pipe 8 through the outlet weir, and then enters the lower anoxic zone. The remaining oxygen in the water is consumed by the aerobic bacteria in the upper biological packing layer 13. As the raw water descends, the anoxic bacteria on the biological packing layer 13 begin to work and carry out denitrification with the raw water. Then, the treated raw water passes through the filter layer 14 to filter out the solid suspended matter, colloids, and detached biofilm in the wastewater, and then is discharged from the outlet pipe 18.

[0021] In Example 2, based on Example 1, the effluent weir includes a support ring plate 9 fixed to the upper part of the treatment tower 1. An overflow cylinder 10 is provided in the inner hole of the support ring plate 9. A conical guide net 22 is fixed to the bottom of the overflow cylinder 10. A sewage pipe 12 is fixed to the bottom of the dividing funnel 3. The raw water flowing from between the two guide plates 7 will block the fluidized packing 6 when passing through the guide net 22, so that the fluidized packing 6 is diverted to the outside of the two guide plates 7 for easy return.

[0022] The lower anoxic zone is equipped with a water distribution weir 5 fixed to the inner wall of the treatment tower 1, and an overflow pipe 8 is connected to the treatment tower 1 outside the water distribution weir 5. The filter layer 14 can be a multi-layered pebble layer or ceramic ball layer, with the particle size of the pebble layer or ceramic ball decreasing from top to bottom. The lateral distance between the inner end outlet of the inlet pipe 2 and the aeration pipe 11 is not less than 30 cm, and the height distance is not less than 20 cm.

[0023] A backwash outlet pipe 4 is also provided on the treatment tower 1 outside the water distribution weir 5. The lower part of the treatment tower 1 is fixed with a backwash water inlet pipe 17 and a backwash air inlet pipe 16. When backwashing is required, the water inlet pipe 2 and the water outlet pipe 18 are closed, the backwash outlet pipe 4 is opened, and then the backwash air inlet pipe 16 is opened to introduce gas to backwash the filter layer 14, loosen the compacted filter layer 14, and evenly distribute the gas through the gaps in the filter layer 14. Then, the solids trapped and generated in the biological packing layer 13 are cleaned. Then, the backwash water inlet pipe 17 is opened to simultaneously introduce air and water. The combined air and water cleaning further discharges the solids trapped and generated in the filter layer 14 and the biological packing layer 13. The backwash water and pollutants are discharged from the backwash outlet pipe 4.

[0024] An installation flange is fixed to the bottom outer side of the overflow cylinder 10, and the installation flange is fixed to the support ring plate 9 by bolts.

[0025] The filter plate 15 is evenly provided with filter holes, and each filter hole is provided with a distribution tube 19. The bottom of the distribution tube 19 passes through the filter plate 15 and is connected to a locking nut 21. The top of the distribution tube 19 passes through the filter plate 15 and is fixedly connected to a hemispherical distribution ball 20. The distribution ball 20 is evenly provided with distribution holes. When installing the distribution tube 19, it is inserted into the filter hole from the top and then the locking nut 21 is screwed on.

[0026] The treatment tower 1 has a multi-section structure, with adjacent sections fixedly connected by connecting flanges. The connecting flanges are equipped with sealing gaskets for easy manufacturing and installation. The top of the treatment tower 1 has an open structure for easy maintenance. The bottom of the treatment tower 1 is funnel-shaped, with the water outlet pipe 18 located in the middle of the bottom of the treatment tower 1. The treatment tower 1 has multiple observation ports along the vertical direction, with maintenance covers at the observation ports and sealing rings between the maintenance covers and the observation ports.

[0027] 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.

[0028] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", 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 do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A chloroamine production wastewater treatment apparatus comprising a treatment tower (1), characterized by: The upper part of the treatment tower (1) is provided with a dividing funnel (3) that divides it into an upper aerobic zone and a lower anoxic zone. The upper aerobic zone is connected to an inlet pipe (2). The upper aerobic zone is provided with two guide plates (7) that are symmetrical about the center line. The guide plates (7) are inclined with the outer lower and inner higher. An aeration pipe (11) is provided between the two guide plates (7). The upper aerobic zone is provided with multiple fluidized packing materials (6). The upper aerobic zone is provided with an outlet weir. An overflow pipe (8) is provided on the treatment tower (1) outside the bottom of the outlet weir. The overflow pipe (8) is connected to the lower anoxic zone. The lower anoxic zone is provided with a biological packing layer (13), a filter layer (14) and a filter plate (15) from top to bottom. The bottom of the treatment tower (1) is provided with an outlet pipe (18).

2. The apparatus for treating wastewater from chloroamine production according to claim 1, characterized in that: The effluent weir includes a support ring plate (9) fixed on the upper part of the treatment tower (1), an overflow cylinder (10) is provided in the inner hole of the support ring plate (9), a conical guide net (22) is fixed at the bottom of the overflow cylinder (10), and a sewage pipe (12) is fixed at the bottom of the dividing funnel (3).

3. The apparatus for treating wastewater from chloroamine production according to claim 1, characterized in that: The lower anoxic zone is provided with a water distribution weir (5) fixed on the inner wall of the treatment tower (1), and an overflow pipe (8) is connected to the treatment tower (1) outside the water distribution weir (5).

4. The wastewater treatment device for chloroamine production according to claim 3, characterized in that: The treatment tower (1) outside the water distribution weir (5) is also equipped with a backwash outlet pipe (4), and the lower part of the treatment tower (1) is fixed with a backwash water inlet pipe (17) and a backwash air inlet pipe (16).

5. The wastewater treatment device for chloroamine production according to claim 2, characterized in that: An installation flange is fixed to the bottom outer side of the overflow cylinder (10), and the installation flange is fixed to the support ring plate (9) by bolts.

6. The wastewater treatment device for chloroamine production according to claim 1, characterized in that: The filter plate (15) is uniformly provided with filter holes, and each filter hole is provided with a distribution tube (19). The bottom of the distribution tube (19) passes through the filter plate (15) and is connected to a locking nut (21). The top of the distribution tube (19) passes through the filter plate (15) and is fixedly connected to a hemispherical distribution ball (20). The distribution ball (20) is uniformly provided with distribution holes.

7. The wastewater treatment device for chloroamine production according to claim 1, characterized in that: The treatment tower (1) has a multi-section structure. Adjacent sections are fixedly connected by connecting flanges. A sealing gasket is provided at the connecting flange. The top of the treatment tower (1) is an open structure, and the bottom of the treatment tower (1) is funnel-shaped. The water outlet pipe (18) is located in the middle of the bottom of the treatment tower (1).

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