Nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure

Abstract

The utility model belongs to the technical field of medical wastewater treatment equipment, and particularly relates to a nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure. Through reasonable arrangement of a contact tank, a detention tank, a closed circulation type oxidation ditch, a mud-water separation tank, an ozone generation device, a wastewater pump, a wastewater cooler, a microporous rubber membrane tube aerator and other matched devices, the overall structure is compact, use and maintenance are convenient, and the medical wastewater treatment efficiency of a nitrification-denitrification oxidation ditch can be greatly improved; the service life of wastewater treatment equipment can be effectively prolonged through the cooperation of the microporous rubber membrane tube aerator, the aeration detection device and the water temperature detection device which are optimally designed in the closed circulation type oxidation ditch, and meanwhile, the service life of the wastewater treatment equipment can be effectively prolonged through the connection of the microporous rubber membrane tube aerator and the air blast system and the reasonable arrangement of the air blower group and the electromagnetic valve group. Air can be uniformly distributed, and the medical wastewater treatment efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical wastewater treatment equipment, and particularly relates to a structure of a nitrification-denitrification oxidation ditch medical wastewater treatment equipment. Background Art

[0002] At present, in the process of removing organic nitrogen and ammonia nitrogen in medical wastewater, the nitrification-denitrification oxidation ditch adopts the method of alternating aeration and submersible stirring to maintain the circulation flow of wastewater, operates alternately under aerobic and anoxic conditions, and can effectively reduce the nitrate concentration in medical wastewater.

[0003] The existing oxidation ditch medical wastewater treatment equipment usually adopts a horizontal surface aerator, which is easy to cause sludge deposition; and due to the lack of measures to inhibit fungi, there will be a large number of filamentous bacteria in the wastewater; at the same time, the existing technology lacks effective oxygen injection means and temperature control means, resulting in a relatively low overall nitrification-denitrification reaction efficiency. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the deficiencies of the prior art, to provide a structure of a nitrification-denitrification oxidation ditch medical wastewater treatment equipment, which is compact in structure, convenient to arrange and install, and can effectively improve the efficiency of treating medical wastewater by the nitrification-denitrification oxidation ditch.

[0005] The technical solution adopted by the utility model to solve the above technical problem is:

[0006] A structure of a nitrification-denitrification oxidation ditch medical wastewater treatment equipment, including a contact tank 1 and a closed-loop oxidation ditch 7. The closed-loop oxidation ditch 7 is divided into an aerobic reaction area and an anoxic reaction area by a microporous rubber membrane tube aerator 10; an ozone generating device 2 is arranged at the bottom of the contact tank 1, a retention tank 3 is arranged at the outlet of the contact tank 1, the retention tank 3 is connected to the aerobic reaction area of the closed-loop oxidation ditch 7 through a connecting pipe 1, a wastewater pump 5, a wastewater cooler 6 and a reflux valve 4 are arranged in sequence on the connecting pipe 1, a reflux pipeline is arranged between the reflux valve 4 and the inlet end of the wastewater cooler 6, and the anoxic reaction area of the closed-loop oxidation ditch 7 is connected to a sludge separation tank 14 through a connecting pipe 2;

[0007] A stirrer 8, an aeration detection device 11 and a water temperature detection device 12 are arranged in the closed-loop oxidation ditch 7, and the microporous rubber membrane tube aerator 10 is connected to a blower system.

[0008] Furthermore, the air inlet end of the microporous rubber membrane tube aerator 10 is installed on a fixed base 15 in the closed-loop oxidation ditch 7, and a connection hole 16 is opened on the side of the air inlet end. The connection hole 16 is connected to the blower system through an air inlet pipe 17.

[0009] Further, a filter 19 and a check valve 21 are provided in the middle of the microporous rubber membrane tube aerator 10. The check valve 21 is installed on the check valve seat 18 inside the microporous rubber membrane tube aerator 10, and a sealing gasket 20 is provided between the check valve 21 and the check valve seat 18.

[0010] Further, the orientation of the air outlet end of the microporous rubber membrane tube aerator 10 is consistent with the flow direction of the wastewater in the closed-loop oxidation ditch 7, and a rubber membrane 24 is provided at the air outlet end. The rubber membrane 24 is fixed to the air outlet end of the microporous rubber membrane tube aerator 10 through a threaded gland 22.

[0011] Further, the aeration detection device 11 is arranged in the anoxic reaction zone of the closed-loop oxidation ditch 7, and the water temperature detection device 12 is arranged in the aerobic reaction zone of the closed-loop oxidation ditch 7.

[0012] Further, the blower system includes a blower group 27, and a solenoid valve group 26 is provided on the intake pipe 17 between the blower group 27 and the microporous rubber membrane tube aerator 10.

[0013] Further, the aeration detection device 11 is electrically connected to the solenoid valve group 26, and the water temperature detection device 12 is electrically connected to the reflux valve 4.

[0014] Further, the contact tank 1 specifically includes two connected contact tank units, and an ozone generating device 2 is provided at the bottom of each contact tank unit.

[0015] Further, the agitator 8 is arranged along the flow direction of the wastewater in the closed-loop oxidation ditch 7 to drive the wastewater in the closed-loop oxidation ditch 7 to form a circulation.

[0016] The present utility model has the following main advantages compared with the prior art:

[0017] 1. The present utility model provides a structure of a nitrification-denitrification oxidation ditch medical wastewater treatment device. Through the reasonable arrangement of a contact tank, a retention tank, a closed-loop oxidation ditch, a sludge-water separation tank, and supporting devices such as an ozone generating device, a wastewater pump, a wastewater cooler, and a microporous rubber membrane tube aerator, the overall structure is compact, easy to use and maintain, and can greatly improve the efficiency of treating medical wastewater by the nitrification-denitrification oxidation ditch;

[0018] 2. The present utility model can effectively improve the service life of the wastewater treatment device through the cooperation of the microporous rubber membrane tube aerator, the aeration detection device, and the water temperature detection device with optimized design inside the closed-loop oxidation ditch. At the same time, by connecting the microporous rubber membrane tube aerator with the blower system and the reasonable setting of the blower group and the solenoid valve group, the air can be evenly distributed, further improving the efficiency of treating medical wastewater. Description of the Drawings

[0019] Figure 1 This is the overall schematic diagram of the structure of the nitrification-denitrification oxidation ditch medical wastewater treatment equipment of the present utility model;

[0020] Figure 2 This is the schematic diagram of the structure of the microporous rubber membrane tube aerator of the present utility model;

[0021] Figure 3 This is the schematic diagram of the blower system of the present utility model.

[0022] In the figure: 1, contact tank; 2, ozone generating device; 3, retention tank; 4, reflux valve; 5, wastewater pump; 6, wastewater cooler; 7, closed-loop oxidation ditch; 8, agitator; 10, microporous rubber membrane tube aerator; 11, aeration detection device; 12, water temperature detection device; 14, sludge-water separation tank; 15, fixed base; 16, connection hole; 17, intake pipe; 18, check valve seat; 19, filter; 20, sealing gasket; 21, check valve; 22, threaded gland; 23, air guide groove; 24, rubber membrane; 25, deflector; 26, solenoid valve group; 27, blower group. Detailed Embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] It should be noted that according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present utility model.

[0025] Embodiment 1, this embodiment provides a structure of a nitrification-denitrification oxidation ditch medical wastewater treatment equipment, as Figures 1 to 3As shown in the figure, it mainly includes a contact tank 1 and a closed-loop oxidation ditch 7. The closed-loop oxidation ditch 7 is divided into an aerobic reaction zone and an anoxic reaction zone by a microporous rubber membrane tube aerator 10; an ozone generation device 2 is provided at the bottom of the contact tank 1, and a retention tank 3 is provided at the outlet of the contact tank 1. The retention tank 3 is connected to the aerobic reaction zone of the closed-loop oxidation ditch 7 through a connecting pipe 1. A wastewater pump 5, a wastewater cooler 6 and a reflux valve 4 are arranged in sequence on the connecting pipe 1. A reflux pipeline is arranged between the reflux valve 4 and the inlet end of the wastewater cooler 6. The anoxic reaction zone of the closed-loop oxidation ditch 7 is connected to a sludge separation tank 14 through a connecting pipe 2;

[0026] A stirrer 8, an aeration detection device 11 and a water temperature detection device 12 are arranged in the closed-loop oxidation ditch 7, and the microporous rubber membrane tube aerator 10 is connected to a blower system.

[0027] Furthermore, the intake end of the microporous rubber membrane tube aerator 10 is installed on a fixed base 15 in the closed-loop oxidation ditch 7, and a connection hole 16 is provided on the side of the intake end. The connection hole 16 is connected to the blower system through an intake pipe 17.

[0028] Furthermore, a filter 19 and a check valve 21 are arranged in the middle of the microporous rubber membrane tube aerator 10. The check valve 21 is installed on a check valve seat 18 inside the microporous rubber membrane tube aerator 10, and a sealing gasket 20 is arranged between the check valve 21 and the check valve seat 18.

[0029] Furthermore, the orientation of the outlet end of the microporous rubber membrane tube aerator 10 is consistent with the flow direction of the wastewater in the closed-loop oxidation ditch 7, and a rubber membrane 24 is provided at the outlet end. The rubber membrane 24 is fixed to the outlet end of the microporous rubber membrane tube aerator 10 through a threaded gland 22.

[0030] Furthermore, the aeration detection device 11 is arranged in the anoxic reaction zone of the closed-loop oxidation ditch 7, and the water temperature detection device 12 is arranged in the aerobic reaction zone of the closed-loop oxidation ditch 7.

[0031] Furthermore, the blower system includes a blower group 27, and a solenoid valve group 26 is arranged on the intake pipe 17 between the blower group 27 and the microporous rubber membrane tube aerator 10.

[0032] Furthermore, the aeration detection device 11 is electrically connected to the solenoid valve group 26, and the water temperature detection device 12 is electrically connected to the reflux valve 4.

[0033] Furthermore, the contact tank 1 specifically includes two connected contact tank units, and an ozone generation device 2 is provided at the bottom of each contact tank unit.

[0034] Further, the agitator 8 is arranged along the flow direction of the wastewater in the closed-loop oxidation ditch 7 for driving the wastewater in the closed-loop oxidation ditch 7 to form a circulation.

[0035] Embodiment 2: A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure provided in this embodiment includes a contact tank, a closed-loop oxidation ditch, a microporous rubber membrane tube aerator, an agitator, a water temperature detection device, a wastewater cooler, an aeration detection device, a sludge separation tank, and a blower system. The closed-loop oxidation ditch is divided into an anoxic reaction zone and an aerobic reaction zone. The anoxic reaction zone is connected to the sludge separation tank, and the aerobic reaction zone is fed with the medical wastewater to be treated. The microporous rubber membrane tube aerator is arranged at the connection between the anoxic reaction zone and the aerobic reaction zone and is connected to the blower system. The blower system uses a set of air generating devices corresponding to a single tank body. The outlet direction of the microporous rubber membrane tube aerator is consistent with the flow direction of the wastewater in the closed-loop oxidation ditch. The aeration detection device is located behind the microporous rubber membrane tube aerator at the inlet end of the anoxic reaction zone, and the water temperature detection device is located behind the microporous rubber membrane tube aerator at the outlet end of the anoxic reaction zone. The wastewater cooler is located in the pipeline between the closed-loop oxidation ditch and the contact tank. The agitator is located in the middle of the aerobic reaction zone. Through the reasonable arrangement of each structure, the efficiency of treating medical wastewater by the nitrification-denitrification oxidation ditch can be effectively improved.

[0036] Specifically: The agitator 8 is located in the closed-loop oxidation ditch 7. The closed-loop oxidation ditch 7 is connected to the sludge separation tank 14 and the contact tank 1 through pipelines. The microporous rubber membrane tube aerator 10 is connected to the blower system. The blower system uses a set of air generating devices corresponding to a single tank body. A sludge separation tank 14 is arranged behind the closed-loop oxidation ditch 7, and part of the sludge is refluxed to the closed-loop oxidation ditch 7. The wastewater pump 5, the wastewater cooler 6, and the reflux valve 4 are located in the pipeline between the closed-loop oxidation ditch 7 and the contact tank 1. An ozone generating device 2 and a retention tank 3 are arranged in the contact tank 1.

[0037] Further, an agitator 8 is arranged in the closed-loop oxidation ditch 7, and the agitator 8 stirs to make the water flow circulation speed in the closed-loop oxidation ditch 7 slightly higher than 0.3 m / s.

[0038] Further, a microporous rubber membrane tube aerator 10 is arranged in the closed-loop oxidation ditch 7, and the microporous rubber membrane tube aerator 10 uses a tubular aerator with a microporous rubber membrane tube.

[0039] Further, the reflux valve 4 is located in the pipeline between the closed-loop oxidation ditch 7 and the contact tank 1.

[0040] Further, a contact tank 1 is provided in front of the closed-loop oxidation ditch 7.

[0041] Further, the blower system uses a set of air generating devices corresponding to a single tank body.

[0042] Further, the closed-loop oxidation ditch 7 is divided into an anoxic reactor and an aerobic reaction zone, and the microporous rubber membrane tube aerator 10 is arranged at the connection between the anoxic reaction zone and the aerobic reaction zone.

[0043] Furthermore, a contact tank 1 is provided in front of the closed-loop oxidation ditch 7, and an ozone gas 2 aerator is arranged in the contact tank; after the wastewater flows into the contact tank 1, it contacts the ozone gas at the bottom of the contact tank 1, then flows into the second co-current contact tank to contact the ozone gas at the bottom, and finally enters the retention tank to increase the reaction time.

[0044] Furthermore, a reflux valve 4, a wastewater cooler 6, and a wastewater pump 5 are provided in front of the closed-loop oxidation ditch 7, and a water temperature detection device 12 is arranged in the closed-loop oxidation ditch 7, and the water temperature detection device 12 is electrically connected to the reflux valve 4;

[0045] Furthermore, an aeration detection device 11 is arranged in the closed-loop oxidation ditch 7, and a solenoid valve group 26 is arranged between the blower and the aeration system 27; the aeration detection device 11 is electrically connected to the solenoid valve group 26;

[0046] Furthermore, the water temperature detection device 12 and the aeration detection device 11 are specifically water temperature detection sensors and aeration detection sensors.

[0047] Furthermore, a check valve 20, a filter 19, a threaded gland 22, and a rubber membrane 24 are arranged in the microporous rubber membrane tube aerator 10; oxygen flows into the microporous rubber membrane tube aerator 10 from the inlet pipe 17, enters the filter 19 and reaches the bottom of the check valve. The pressure at the top of the check valve 20 is less than the pressure at the bottom, the check valve 20 opens, and oxygen flows to the rubber membrane 24. The rubber membrane 24 is provided with microporous slits, and the slit diameter is Φ0.8mm. Oxygen diffuses in the form of microbubbles through the elastic rubber membrane 24 with many slits. When aeration stops, the slit will close immediately, effectively preventing sludge from flowing back into the aerator. If the rubber membrane 24 fails, the check valve 20 can prevent wastewater from entering the system pipeline.

[0048] Furthermore, a solenoid valve group 26 and three blowers are arranged in the blower system; the blower system uses a set of air generating devices corresponding to a single tank body to ensure uniform air distribution.

[0049] Further, the parts not detailed in this application are the same as the prior art or are implemented using the prior art.

[0050] In summary:

[0051] 1. The present utility model provides a structure of a nitrification-denitrification oxidation ditch medical wastewater treatment device. Through the reasonable arrangement of a contact tank, a retention tank, a closed-loop oxidation ditch, a sludge-water separation tank, and supporting devices such as an ozone generator, a wastewater pump, a wastewater cooler, and a microporous rubber membrane tube aerator, the overall structure is compact, easy to use and maintain, and can greatly improve the efficiency of treating medical wastewater by the nitrification-denitrification oxidation ditch;

[0052] 2. The present utility model, through the cooperation of the microporous rubber membrane tube aerator, the aeration detection device, and the water temperature detection device with optimized design inside the closed-loop oxidation ditch, can effectively improve the service life of the wastewater treatment device. At the same time, by connecting the microporous rubber membrane tube aerator to the air blowing system and cooperating with the reasonable setting of the blower group and the solenoid valve group, the air can be evenly distributed, further improving the efficiency of treating medical wastewater.

[0053] The above embodiments are only used to illustrate the design concept and characteristics of the present utility model, and their purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. The protection scope of the present utility model is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design ideas disclosed by the present utility model are within the protection scope of the present utility model.

Claims

1. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure, characterized in that: The invention comprises a contact tank (1) and a closed circulation oxidation ditch (7), wherein the closed circulation oxidation ditch (7) is divided into an aerobic reaction zone and an anoxic reaction zone by a microporous rubber membrane tube aerator (10); an ozone generator (2) is provided at the bottom of the contact tank (1); a retention tank (3) is provided at the outlet of the contact tank (1); the retention tank (3) is connected to the aerobic reaction zone of the closed circulation oxidation ditch (7) through a connecting pipe 1; a wastewater pump (5), a wastewater cooler (6) and a reflux valve (4) are provided on the connecting pipe 1 in sequence; a reflux pipeline is provided between the reflux valve (4) and the inlet end of the wastewater cooler (6); and the anoxic reaction zone of the closed circulation oxidation ditch (7) is connected to a mud-water separation tank (14) through a connecting pipe 2; The closed circulation oxidation ditch (7) is provided with a stirrer (8), an aeration detection device (11) and a water temperature detection device (12), and the microporous rubber membrane tube aerator (10) is connected to an air blowing system.

2. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 1, characterized in that: The air inlet end of the microporous rubber membrane tube aerator (10) is installed on a fixed base (15) in the closed circulation oxidation ditch (7), and a connecting hole (16) is opened on the side of the air inlet end. The connecting hole (16) is connected to the blowing system through an air inlet pipe (17).

3. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 2, characterized in that: A filter (19) and a check valve (21) are provided in the middle of the microporous rubber membrane tube aerator (10). The check valve (21) is installed on a check valve seat (18) inside the microporous rubber membrane tube aerator (10), and a sealing gasket (20) is provided between the check valve (21) and the check valve seat (18).

4. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 3, characterized in that: The direction of the air outlet end of the microporous rubber membrane tube aerator (10) is consistent with the flow direction of the wastewater in the closed circulation oxidation ditch (7), and the air outlet end is provided with a rubber diaphragm (24), and the rubber diaphragm (24) is fixed to the air outlet end of the microporous rubber membrane tube aerator (10) through a threaded gland (22).

5. The nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 1 is characterized by: The aeration detection device (11) is arranged in the anoxic reaction zone of the closed circulation oxidation ditch (7), and the water temperature detection device (12) is arranged in the aerobic reaction zone of the closed circulation oxidation ditch (7).

6. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 1, characterized in that: The air blowing system comprises an air blower group (27), and an electromagnetic valve group (26) is provided on the air inlet pipe (17) between the air blower group (27) and the microporous rubber membrane tube aerator (10).

7. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 6, characterized in that: The aeration detection device (11) is electrically connected to the electromagnetic valve group (26), and the water temperature detection device (12) is electrically connected to the return valve (4).

8. The nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 1 is characterized by: The contact pool (1) specifically comprises two interconnected contact pool units, and an ozone generating device (2) is provided at the bottom of each contact pool unit.

9. A nitrification-denitrification oxidation ditch medical wastewater treatment equipment structure according to claim 6, characterized in that: The agitator (8) is arranged along the flow direction of the wastewater in the closed circulation oxidation ditch (7) and is used to drive the wastewater in the closed circulation oxidation ditch (7) to form a circulation.

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