Oily wastewater settling tank

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses an oily wastewater settling tank which comprises a tank body, a round hole is formed in the outer wall surface of the tank body, a liquid inlet pipe is fixedly connected in the round hole, an oil outlet is formed in the outer wall surface of the tank body, a round hole is formed in the outer wall surface of the tank body, and the liquid inlet pipe is fixedly connected in the round hole. According to the waste water treatment device, the gas bin can rotate clockwise under the mutual cooperative use of the fixed rod, the exhaust pipe and the bearing, bubbles can be more effectively attached to oil drops of waste water, the floating speed of the oil drops is increased, and through the mutual cooperative use of the exhaust pipe, the fixed column, the fixed ring and the fixed strip, the waste water treatment effect is improved. According to the oil separation device, oil drops and bubbles in waste water can be fully mixed through the exhaust pipe and the blades at the same time, it is guaranteed that more bubbles can make contact with the oil drops, the air flotation efficiency is improved, oil in the waste water can be discharged through the oil outlet pipe under the mutual cooperative use of the liquid level meter, the flow guide frame and the overflow weir, and the oil separation effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically to a settling tank for oily wastewater. Background Technology

[0002] An oily wastewater settling tank is a device used to treat oily wastewater. Its main function is to separate oil, water and solid impurities through gravity settling and the density difference between oil and water. Oily wastewater settling tanks are widely used in the treatment of oily wastewater in industries such as oil extraction, petrochemicals, and oil refineries. They can effectively reduce the oil content in wastewater and facilitate subsequent treatment.

[0003] Most current oily wastewater settling tanks are ordinary storage tanks with a design of intermediate feeding, upper oil discharge, and lower water discharge. The level gauge indicates the overall liquid level inside the tank and cannot determine the amount of oil phase in the settling tank. As a result, the oil separated during the oil separation operation contains a large amount of water, requiring secondary settling treatment. Since the oil separation operation is not carried out periodically, the oil phase accumulates in the settling tank, which is not conducive to the settling of wastewater and results in poor oil separation effect. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an oily wastewater settling tank to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution:

[0006] An oily wastewater settling tank includes: a tank body, a circular hole on the outer wall of the tank body, an inlet pipe fixedly connected to the circular hole, an oil outlet on the outer wall of the tank body, a water outlet fixedly connected to the circular hole on the outer wall of the tank body, a level gauge on one side of the tank body, the level gauge being connected to the tank body via a pipe and a flange, and an oil separation component inside the tank body;

[0007] The oil separating component includes: an overflow weir, which is sealed and installed on the inner wall of the tank body; a guide frame is fixedly connected inside the overflow weir; the bottom surface of the overflow weir is higher than the bottom surface of the guide frame; an oil collecting hole is opened at the center of the guide frame; an oil outlet pipe is fixedly connected inside the oil collecting hole; the oil outlet pipe is fixedly connected to the oil outlet; the oil outlet pipe is located above the liquid inlet pipe; the water outlet is located below the liquid inlet pipe; a rotating component is provided below the oil separating component; an air inlet is provided on the outer wall of the tank body; and the air inlet is connected to the rotating component.

[0008] Furthermore, the rotating component includes: an air chamber located inside the tank body; a fixing rod fixedly connected to the bottom surface of the air chamber; a bearing embedded in the inner bottom wall of the tank body; the fixing rod fixedly connected to the inner ring of the bearing; and several circular holes opened on the outer wall surface of the air chamber. A one-way air valve is fixedly connected inside the circular holes, and an exhaust pipe is fixedly connected inside the one-way air valve.

[0009] Furthermore, the rotating component also includes: a fixing ring, which is respectively disposed at one end of the exhaust pipe. A plurality of fixing posts are fixedly connected to one end of the fixing ring, and the fixing posts are fixedly connected to one end of the exhaust pipe. A fixing strip is fixedly connected to the other end of the fixing ring, and a blade is rotatably connected to one side of the fixing strip.

[0010] Furthermore, the air intake component includes: an air pump, which is fixedly connected to the outer wall of the tank, and an air intake pipe is fixedly connected to the exhaust port of the air pump, with one end of the air intake pipe fixedly connected to the air inlet of the air chamber.

[0011] Furthermore, the level gauge is a magnetic float level gauge with remote transmission. The float inside the level gauge can float normally in water but cannot float in oil.

[0012] Furthermore, the top surface of the flow guide is an overflow surface, and the overflow surface of the flow guide is lower than the upper interface of the level gauge.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] During the settling process of oily wastewater in the tank, the air pump, air inlet pipe, air chamber, air valve, and exhaust pipe work together to allow gas to enter the exhaust pipe and squeeze out the wastewater, forming bubbles. The fixed rod, exhaust pipe, and bearing work together to rotate the air chamber clockwise, allowing the bubbles to more effectively adhere to the oil droplets in the wastewater, increasing the rise speed of the oil droplets. The exhaust pipe, fixed column, fixed ring, and fixed strip work together to ensure that the exhaust pipe and blades thoroughly mix the oil droplets and bubbles in the wastewater. To ensure more air bubbles can contact oil droplets and improve flotation efficiency, the oil in wastewater can be discharged through the oil outlet pipe by using a combination of a level gauge, a guide frame, and an overflow weir. Compared with existing technologies, this application can maintain stable water and oil levels in the tank, preventing water from entering the overflow surface of the guide frame and separating with the oil. It can continuously discharge oil from wastewater, reducing oil accumulation in the tank, and is easy to operate. At the same time, during wastewater settling, the agitation of the wastewater and the cutting of air bubbles allow the air bubbles to mix more effectively with the oil droplets, improving the efficiency of wastewater and oil separation and accelerating the settling process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the tank structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the air chamber structure of this utility model;

[0019] Figure 5 This utility model Figure 3 A partial structural diagram of A in the middle;

[0020] Figure 6 This utility model Figure 3 A schematic diagram of the partial structure of B in the diagram;

[0021] Figure 7 This utility model Figure 4 A schematic diagram of the local structure of C.

[0022] The attached diagram is labeled as follows: 1. Tank body; 2. Oil outlet pipe; 3. Water outlet; 4. Air pump; 5. Air inlet pipe; 6. Oil outlet; 7. Liquid inlet pipe; 8. Level gauge; 9. Oil collection hole; 10. Flow guide frame; 11. Overflow weir; 12. Air chamber; 13. Bearing; 14. Fixing rod; 15. One-way air valve; 16. Exhaust pipe; 17. Fixing column; 18. Fixing ring; 19. Blade; 20. Fixing strip. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0024] Figures 1-7 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 ~Appendix Figure 7 The present invention will be further described below.

[0025] An oily wastewater settling tank includes: a tank body 1, a circular hole on the outer wall of the tank body 1, an inlet pipe 7 fixedly connected to the circular hole, an oil outlet 6 on the outer wall of the tank body 1, a water outlet 3 fixedly connected to the circular hole on the outer wall of the tank body 1, a level gauge 8 on one side of the tank body 1, the level gauge 8 being connected to the tank body 1 via a pipe and a flange, and an oil separation component inside the tank body 1.

[0026] The oil separating component includes: an overflow weir 11, which is sealed and installed on the inner wall of the tank body 1. A guide frame 10 is fixedly connected inside the overflow weir 11. The bottom surface of the overflow weir 11 is higher than the bottom surface of the guide frame 10. An oil collecting hole 9 is opened at the center of the guide frame 10. An oil outlet pipe 2 is fixedly connected inside the oil collecting hole 9. The oil outlet pipe 2 is fixedly connected to the oil outlet 6. The oil outlet pipe 2 is located above the liquid inlet pipe 7, and the water outlet 3 is located below the liquid inlet pipe 7. A rotating component is provided below the oil separating component. An air inlet is provided on the outer wall of the tank body 1. The air inlet is connected to the rotating component.

[0027] Specifically, the rotating component includes: an air chamber 12, which is located inside the tank body 1. A fixing rod 14 is fixedly connected to the bottom surface of the air chamber 12. A bearing 13 is embedded in the inner bottom wall of the tank body 1. The fixing rod 14 is fixedly connected to the inner ring of the bearing 13. Several circular holes are opened on the outer wall of the air chamber 12. A one-way air valve 15 is fixedly connected inside the circular holes. An exhaust pipe 16 is fixedly connected inside the one-way air valve 15. The exhaust pipe 16 is evenly arranged around the air chamber 12 and is a curved pipe. The rotating component also includes: a fixing ring 18, which is located at one end of the exhaust pipe 16. Several fixing posts 17 are fixedly connected to one end of the fixing ring 18. The fixing posts 17 are fixedly connected to one end of the exhaust pipe 16. A fixing strip 20 is fixedly connected to the other end of the fixing ring 18. A blade 19 is rotatably connected to one side of the fixing strip 20. The three sides of the blade 19 are all pointed.

[0028] In this embodiment, through the gas chamber 12, when gas enters the gas chamber 12, the gas enters the exhaust pipe 16 through the one-way valve 15. Since the one-way valve 15 can only release gas and not allow water to enter, the gas enters the exhaust pipe 16 and squeezes out the wastewater in the exhaust pipe 16, forming bubbles. At this time, multiple exhaust pipes 16 exhaust gas into the wastewater. Since the gas chamber 12 is connected to the bearing 13 through the fixing rod 14, and since the exhaust pipes 16 are evenly arranged around the gas chamber 12 and are curved, multiple exhaust pipes 16 drive the gas chamber 12 to rotate clockwise during exhaust. When the bubbles pass through the blades 19, they are divided into smaller bubbles, thereby increasing the surface area and number of bubbles. The smaller bubbles have a larger specific surface area, which allows the bubbles to attach more effectively to the oil droplets in the wastewater and increase the floating speed of the oil droplets.

[0029] Specifically, the air intake component includes: an air pump 4, which is fixedly connected to the outer wall of the tank 1. An air intake pipe 5 is fixedly connected to the exhaust port of the air pump 4, and one end of the air intake pipe 5 is fixedly connected to the air inlet of the air chamber 12.

[0030] In this embodiment, the air pump 4 is installed so that during the sedimentation of wastewater, air is drawn in from the outside and injected into the air chamber 12 through the air inlet pipe 5.

[0031] Specifically, the level gauge 8 is a magnetic float level gauge. The float inside the level gauge 8 can float normally in water, but cannot float in oil.

[0032] In this implementation scheme, the liquid level gauge 8 is set up so that the float inside the liquid level gauge 8 can float normally in water but cannot float in oil, thereby achieving the effect of distinguishing wastewater from oil.

[0033] Specifically, the top surface of the flow guide 10 is the overflow surface, and the overflow surface of the flow guide 10 is lower than the upper interface of the level gauge 8.

[0034] In this embodiment, the overflow surface of the guide frame 10 is lower than the upper interface of the level gauge 8, which facilitates the level gauge 8 to monitor the oil level inside the tank 1.

[0035] The working principle and usage process of this utility model are as follows: During use, oily wastewater can enter the tank 1 through the inlet pipe 7. During the settling process, the air pump 4 draws air from the outside and injects it into the air chamber 12 through the air inlet pipe 5. At this time, the gas enters multiple exhaust pipes 16 through the one-way valve 15. Since the one-way valve 15 can only release air and not allow water to enter, the gas enters the exhaust pipes 16 and squeezes out the wastewater in the exhaust pipes 16, forming bubbles. At this time, multiple exhaust pipes 16 exhaust gas into the wastewater. Since the air chamber 12 is connected to the bearing 13 through the fixing rod 14, and the exhaust pipes 16 are evenly arranged around the air chamber 12 and are curved, the reaction force of the gas discharged from multiple exhaust pipes 16 during exhaust drives the air chamber 12 to rotate clockwise. When the bubbles pass through the blades 19, they are divided into... Smaller bubbles increase the surface area and number of bubbles, and their larger specific surface area allows them to adhere more effectively to oil droplets in the wastewater, increasing the rising speed of the oil droplets. Simultaneously, the water flow stirred by the rotating exhaust pipe 16 causes the blades 19 to rotate. Both the exhaust pipe 16 and the blades 19 simultaneously agitate the wastewater, ensuring thorough mixing of oil droplets and bubbles, guaranteeing more bubbles can contact the oil droplets and improving flotation efficiency. Then, the operator can observe the level gauge 8 and adjust the inflow and outflow of water in the tank 1 to ensure the water level in the tank 1 does not exceed the overflow surface of the guide frame 10 and maintains a stable level. As oil gradually rises from the wastewater and accumulates on the surface, when the oil level exceeds the overflow surface of the guide frame 10, the oil is discharged through the oil outlet pipe 2, ensuring the effective oil separation.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A settling tank for oily wastewater, characterized in that, include: Tank (1), the outer wall of the tank (1) is provided with a circular hole, the inlet pipe (7) is fixedly connected in the circular hole, the outer wall of the tank (1) is provided with an oil outlet (6), the outer wall of the tank (1) is provided with a circular hole, the outlet pipe (3) is fixedly connected in the circular hole, a level gauge (8) is provided on one side of the tank (1), the level gauge (8) is connected to the tank (1) through a pipe and a flange, and an oil separator is provided inside the tank (1); The oil separating component includes: an overflow weir (11), which is sealed and installed on the inner wall of the tank (1). A guide frame (10) is fixedly connected inside the overflow weir (11). The bottom surface of the overflow weir (11) is higher than the bottom surface of the guide frame (10). An oil collecting hole (9) is opened at the center of the guide frame (10). An oil outlet pipe (2) is fixedly connected inside the oil collecting hole (9). The oil outlet pipe (2) is fixedly connected to the oil outlet (6). The oil outlet pipe (2) is located above the liquid inlet pipe (7). The water outlet (3) is located below the liquid inlet pipe (7). A rotating component is provided below the oil separating component. An air inlet is provided on the outer wall of the tank (1). The air inlet is connected to the rotating component.

2. The settling tank for oily wastewater according to claim 1, characterized in that, The rotating component includes: an air chamber (12), which is located inside the tank (1). A fixing rod (14) is fixedly connected to the bottom surface of the air chamber (12). A bearing (13) is embedded in the inner bottom wall of the tank (1). The fixing rod (14) is fixedly connected to the inner ring of the bearing (13). Several circular holes are opened on the outer wall of the air chamber (12). A one-way air valve (15) is fixedly connected inside the circular holes. An exhaust pipe (16) is fixedly connected inside the one-way air valve (15).

3. The settling tank for oily wastewater according to claim 2, characterized in that, The rotating component further includes: a fixing ring (18), which is respectively disposed at one end of the exhaust pipe (16). A plurality of fixing posts (17) are fixedly connected to one end of the fixing ring (18), and the fixing posts (17) are fixedly connected to one end of the exhaust pipe (16). A fixing strip (20) is fixedly connected to the other end of the fixing ring (18), and a blade (19) is rotatably connected to one side of the fixing strip (20).

4. The settling tank for oily wastewater according to claim 2, characterized in that, The air intake component includes an air pump (4), which is fixedly connected to the outer wall of the tank (1). An air intake pipe (5) is fixedly connected to the exhaust port of the air pump (4), and one end of the air intake pipe (5) is fixedly connected to the air inlet of the air chamber (12).

5. The settling tank for oily wastewater according to claim 1, characterized in that, The level gauge (8) is a magnetic float level gauge with remote transmission. The float inside the level gauge (8) can float normally in water but cannot float in oil.

6. The settling tank for oily wastewater according to claim 1, characterized in that, The top surface of the guide frame (10) is the overflow surface, and the overflow surface of the guide frame (10) is lower than the upper interface of the level gauge (8).

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