Medical sewage a / o treatment device

Abstract

This utility model proposes an AO treatment device for medical wastewater, relating to the technical field of medical wastewater treatment devices. It includes a tank, an equalization tank, an anaerobic tank, an aerobic tank, a sedimentation tank, an aeration coil, and a blower. The tank is equipped with an inlet pipe and a dosing pipe connected to the equalization tank. A drain outlet at the bottom of the equalization tank's partition connects to the anaerobic tank. A packing layer is installed in the anaerobic tank. A drain outlet at the top of the anaerobic tank's partition connects to the aerobic tank. A packing frame is installed in the aerobic tank, and packing balls are movably filled within the frame. The aeration coil is located below the packing frame. A drain outlet at the aerobic tank's partition connects to the sedimentation tank. This application solves the problems of existing AO treatment devices, such as the need for regular backwashing of biological packing, cumbersome and costly maintenance, and the shedding of fine biofilm fragments from the biological packing, resulting in high suspended solids concentration in the effluent, which is detrimental to subsequent disinfection treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of medical wastewater treatment devices, specifically to a medical wastewater AO treatment device. Background Technology

[0002] Hospital wastewater has complex sources and compositions, containing acids, alkalis, suspended solids, BOD, COD, and pathogenic microorganisms. After treatment, hospital wastewater needs to be disinfected before discharge. AO treatment equipment connects an anaerobic stage upstream and an aerobic stage downstream. In the anaerobic stage, heterotrophic bacteria hydrolyze suspended pollutants and soluble organic matter in the wastewater, converting insoluble organic matter into soluble organic matter. When these anaerobic hydrolysis products enter the aerobic tank for aerobic treatment, the biodegradability and oxygen efficiency of the wastewater are improved, completing the C, N, and O cycle in the ecosystem and achieving harmless treatment of the wastewater.

[0003] Currently, medical wastewater AO treatment equipment has the following problems in use: First, the aerobic stage uses biological packing material to replace activated sludge to avoid the problem of activated sludge loss and maintain a high biomass in the aerobic stage. However, the current biological packing material requires regular backwashing, which is cumbersome and costly to maintain. Second, some fine biofilm fragments are shed from the biological packing material. These fine biofilm fragments have poor sedimentation performance, resulting in a high concentration of suspended solids in the effluent, which is not conducive to subsequent disinfection treatment. Therefore, this application proposes a medical wastewater AO treatment device. Utility Model Content

[0004] To overcome the problems in the background technology, this utility model provides a medical wastewater AO treatment device, which solves the problems of the biological packing material requiring regular backwashing, which is cumbersome and costly to maintain, and the biological packing material shedding some fine biofilm fragments, resulting in poor biofilm sedimentation performance and high suspended solids concentration in the effluent, which is not conducive to subsequent disinfection treatment.

[0005] A medical wastewater AO treatment device includes a tank, an equalization tank, an anaerobic tank, an aerobic tank, a sedimentation tank, an aeration coil, and a blower. The tank is equipped with an inlet pipe and a dosing pipe connected to the equalization tank. A drain outlet at the bottom of the equalization tank's partition connects to the anaerobic tank. The anaerobic tank contains a packing layer. A drain outlet at the top of the anaerobic tank's partition connects to the aerobic tank. The aerobic tank contains a packing frame, which is movably filled with packing balls. The aeration coil is located below the packing frame and connects to the blower installed at the top of the tank. A drain outlet at the aerobic tank's partition connects to the sedimentation tank. The tank is equipped with a drain pipe and a sludge discharge pipe connected to the sedimentation zone.

[0006] Furthermore, the aerobic tank is equipped with a baffle at the top, and the bottom of the baffle is a channel. The aerobic tank on both sides of the baffle is equipped with a packing frame and packing balls. The drain outlet is located on the upper part of the baffle of the aerobic tank and connected to the sedimentation tank.

[0007] Furthermore, the top and bottom plates of the packing frame are grid plates, and the top and bottom plates are connected by partition columns. The packing balls are longitudinally and movably filled in the small partitions formed by the partition columns, and the diameter of the packing balls is larger than the spacing between the partition columns.

[0008] Furthermore, a second baffle is provided at the top of the sedimentation tank. One side of the second baffle is a suspended zone adjacent to the aerobic tank, and the other side is a sedimentation zone. The bottom of the second baffle is a second channel. A slag discharge pipe is provided on the upper part of the box of the suspended zone. The drainage pipe and sludge discharge pipe are respectively located at the upper and lower parts of the sedimentation zone.

[0009] Furthermore, a filter plate is installed in the upper middle part of the suspension zone, and an inclined filter plate is provided in the lower part of the sedimentation zone.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This application features a packing frame with movable packing balls inside. Microorganisms grow permanently on the packing balls. Under aeration, the packing balls move up and down, colliding with each other, and excess biofilm on the packing surface can be washed away. This reduces the frequency of backwashing maintenance, solving the problem of current biological packing requiring regular backwashing, which is cumbersome and costly. The sedimentation tank in this application is divided into a suspended zone and a sedimentation zone by baffles. The suspended zone collects biofilm that may detach from the biological packing, preventing it from entering the sedimentation zone and being discharged into the subsequent disinfection process. This solves the problem of poor sedimentation performance of fine biofilm produced by current equipment, resulting in high suspended solids concentration in the effluent, which is detrimental to subsequent disinfection. Attached Figure Description

[0012] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

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

[0014] Figure 2 This is a schematic diagram of the internal assembly structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the packing frame structure of this utility model.

[0017] 1-Box body, 11-Sewage inlet pipe, 12-Dosing pipe, 13-Drainage pipe, 14-Sludge discharge pipe, 15-Slag discharge pipe, 2-Equalization tank, 21-Drainage outlet one, 3-Anaerobic tank, 31-Catalyst layer, 32-Drainage outlet two, 4-Aerobic tank, 41-Baffle one, 42-Channel one, 43-Drainage outlet three, 5-Sedimentation tank, 51-Baffle two, 52-Channel two, 53-Filter plate, 54-Inclined filter plate, 6-Aeration coil, 7-Blower, 8-Catalyst frame, 81-Grid plate, 82-Divider column, 9-Catalyst ball. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0019] This utility model discloses a medical wastewater AO treatment device, see reference. Figure 1-4 A medical wastewater AO treatment device includes a tank 1, an equalization tank 2, an anaerobic tank 3, an aerobic tank 4, a sedimentation tank 5, an aeration coil 6, and a blower 7. The tank 1 is equipped with an inlet pipe 11 and a dosing pipe 12 connected to the equalization tank 2 inside the tank 1. A drain outlet 21 at the bottom of the partition of the equalization tank 2 is connected to the anaerobic tank 3. The anaerobic tank 3 is equipped with a packing layer 31. A drain outlet 32 ​​at the top of the partition of the anaerobic tank 3 is connected to the aerobic tank 4. The aerobic tank 4 is equipped with a packing frame 8, and packing balls 9 are movably filled in the packing frame 8. The aeration coil 6 is located below the packing frame 8 and connected to the blower 7 installed at the top of the tank 1. A drain outlet 43 at the partition of the aerobic tank 4 is connected to the sedimentation tank 5. The tank 1 is equipped with a drain pipe 13 and a sludge discharge pipe 14 connected to the sedimentation zone.

[0020] Wastewater treated by the screen enters the equalization tank 2 through the inlet pipe 11. After chemical dosing through the dosing pipe 12, it undergoes equalization treatment. The equalization tank 2 is equipped with an overflow plate. The wastewater and chemical mixture overflows through the overflow plate and enters the anaerobic tank 3 through the discharge port 21 at the bottom of the equalization tank 2. In the anaerobic tank 3, after passing through the packing layer 31, it enters the aerobic tank 4 through the discharge port 32. In the aerobic tank, the wastewater comes into contact with the packing balls 9 in the packing frame 8 for oxidation. The packing balls 9 flow up and down and collide with each other under the aeration of the aeration coil 6. Excess biofilm on the surface of the packing balls 9 can be washed away, reducing the number of times the packing needs to be backwashed for maintenance. The wastewater treated in the aerobic tank 4 enters the sedimentation tank 5 through the discharge port 43 for sedimentation and separation. The upper effluent is discharged through the drain pipe 13, and the lower sludge can be discharged through the sludge discharge pipe 14.

[0021] See Figure 1-4The aerobic tank 4 is equipped with a baffle 41 at the top and a channel 42 at the bottom. The aerobic tank 4 on both sides of the baffle 41 is equipped with a packing frame 8 and a packing ball 9. The drain outlet 43 is located at the upper part of the baffle of the aerobic tank 4 and connected to the sedimentation tank 5. This can increase the flow of sewage and allow the pollutants in the sewage to fully contact and oxidize with the packing ball 9, thereby improving the removal rate.

[0022] See Figure 1-4 The top and bottom plates of the packing frame 8 are grid plates 81, and the top and bottom plates are connected by partition columns 82. The packing balls 9 are longitudinally and movably filled in the small partitions formed by the partition columns 82, and the diameter of the packing balls 9 is larger than the spacing of the partition columns 82. This allows the packing balls 9 to be evenly distributed during the up-and-down flow, avoiding uneven distribution of the packing balls 9 during aeration, which would affect the uniformity of contact oxidation and the quality of pollutant treatment.

[0023] See Figure 1-4 The sedimentation tank 5 is equipped with a baffle 51 at the top. One side of the baffle 51 is a suspended zone adjacent to the aerobic tank 4, and the other side is a sedimentation zone. The bottom of the baffle 51 is a channel 52. A slag discharge pipe 15 is installed on the box 1 above the suspended zone. The drain pipe 13 and sludge discharge pipe 14 are respectively installed at the upper and lower parts of the sedimentation zone. The suspended zone can collect the biofilm that will fall off the biological packing and discharge it through the slag discharge pipe 15 to prevent it from entering the sedimentation zone and affecting the subsequent disinfection treatment.

[0024] See Figure 1-4 The upper and middle parts of the suspended zone are equipped with filter plates 53, and the lower part of the sedimentation zone is equipped with inclined filter plates 54, which can improve the separation effect of suspended solids and sludge.

[0025] Work process:

[0026] Wastewater treated by the bar screen enters the equalization tank 2 through the inlet pipe 11. After being mixed and regulated with chemicals, the wastewater enters the anaerobic tank 3. In the anaerobic tank 3, the wastewater is treated by the packing layer 31 and then enters the aerobic tank 4 through the outlet 32. It comes into contact with the packing balls 9 in the packing frame 8 for oxidation. After the blower 7 is started, the packing balls 9 move up and down and collide with each other under the aeration of the aeration coil 6. The excess biofilm on the surface of the packing balls 9 is washed away. The wastewater treated in the aerobic tank 4 enters the sedimentation tank 5. The suspended solids remain in the upper layer of the suspended zone and are periodically discharged by the sludge discharge pipe 15. The remaining wastewater enters the sedimentation zone for sedimentation and separation. The upper effluent is discharged from the drain pipe 13, and the lower sludge is periodically discharged from the sludge discharge pipe 14. Alternatively, it can be pumped back to the anaerobic tank 3 for reuse through the return pipe.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A medical wastewater AO treatment device, characterized in that: The system includes a housing (1), an equalization tank (2), an anaerobic tank (3), an aerobic tank (4), a sedimentation tank (5), an aeration coil (6), and a blower (7). The housing (1) is equipped with a sludge inlet pipe (11) and a dosing pipe (12) that connect to the equalization tank (2) inside the housing (1). The drain outlet (21) at the bottom of the partition of the equalization tank (2) is connected to the anaerobic tank (3). The anaerobic tank (3) is equipped with a packing layer (31). The upper part of the partition of the anaerobic tank (3) has a... There is a second drain outlet (32) connected to the aerobic tank (4). The aerobic tank (4) is equipped with a packing frame (8). The packing frame (8) is filled with packing balls (9). The aeration coil (6) is located below the packing frame (8) and connected to the blower (7) installed on the top of the box (1). The partition of the aerobic tank (4) is provided with a third drain outlet (43) connected to the sedimentation tank (5). The box (1) is equipped with a drain pipe (13) and a sludge discharge pipe (14) connected to the sedimentation area.

2. The medical wastewater AO treatment equipment according to claim 1, characterized in that: The aerobic tank (4) is equipped with a baffle (41) at the top and a channel (42) at the bottom. The aerobic tank (4) on both sides of the baffle (41) is equipped with a packing frame (8) and a packing ball (9). The drain outlet (43) is located on the upper part of the partition of the aerobic tank (4) and connected to the sedimentation tank (5).

3. The medical wastewater AO treatment equipment according to claim 1, characterized in that: The top and bottom plates of the packing frame (8) are grid plates (81), and the top and bottom plates are connected by partition columns (82). The packing balls (9) are longitudinally and movably filled in the small partitions divided by each partition column (82), and the diameter of the packing balls (9) is larger than the spacing of the partition columns (82).

4. The medical wastewater AO treatment equipment according to claim 1, characterized in that: The sedimentation tank (5) is equipped with a baffle plate (51) at the top. One side of the baffle plate (51) is a suspended zone adjacent to the aerobic tank (4), and the other side is a sedimentation zone. The bottom of the baffle plate (51) is a channel (52). A slag discharge pipe (15) is installed on the box (1) above the suspended zone. The drainage pipe (13) and sludge discharge pipe (14) are respectively installed at the upper and lower parts of the sedimentation zone.

5. The medical wastewater AO treatment equipment according to claim 4, characterized in that: A filter plate (53) is installed in the upper middle part of the suspension zone, and an inclined filter plate (54) is provided in the lower part of the sedimentation zone.

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