A wastewater oil separation treatment and purification sedimentation tank

Abstract

The utility model discloses a wastewater oil separation treatment purification sedimentation tank is equipped with oil tank on one side of sedimentation tank, is equipped with aeration mechanism in the sedimentation tank, is equipped with oil scraping mechanism on the top of sedimentation tank, is equipped with oil scraping mouth on one side top of sedimentation tank, and the oil scraping mechanism is scraped to oil tank along the oil scraping mouth with floating oil, is equipped with water inlet and drain outlet on the sedimentation tank, and is equipped with the desilting mouth for the desilting treatment after drainage on the bottom, and aeration mechanism includes motor, gas collection bin, aeration pipe, air inlet pipe, support plate, isolation protection cover, and oil scraping mechanism includes electric push rod, scraper, guide shaft, the utility model discloses through the rotation effect of the oblique aeration pipe and aeration pipe, makes its bubble always keep a certain distance in the movement process, avoids the distance between adjacent bubbles too close, reduces the probability of bubble fusion phenomenon, guarantees floating oil treatment effect.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and specifically relates to a wastewater oil separation and purification sedimentation tank. Background Technology

[0002] In the treatment of oily wastewater, oil removal is a crucial part of the treatment process. Depending on the type of wastewater and its oil content, the methods for oil removal also vary, including the form in which oil exists in the water, such as floating oil, dispersed oil, and emulsified oil. Floating oil can be treated using oil separators and centrifugal separation methods; dispersed oil and emulsified oil can be treated using methods such as air flotation and adsorption.

[0003] A search revealed a novel oil-containing heavy metal wastewater treatment system with the existing technology announcement number CN 218910081 U. When using this utility model, the oil can first be separated, and then it can be quickly mixed with the reactants when passing between various baffles. Moreover, the oil can be settled in the purification tank before being discharged. It is simple to operate and convenient to use.

[0004] In addition, aeration heads were installed at the bottom for auxiliary aeration treatment; however, the aeration technology also has certain drawbacks, namely, the drawback that bubbles will merge again during the ascent. Furthermore, after bubbles merge into a large bubble, their overall surface area will be significantly reduced. Therefore, the amount of oil carried by the bubbles to the water surface is reduced, and the reduction in surface area directly leads to a decrease in oil flocculation efficiency.

[0005] The main reasons for bubble merging are as follows: 1. Initial state and path randomness: The size and rising path of the bubble swarm generated from the aerator are not completely uniform; they have size differences when they leave the orifice, and small disturbances during the rising process will cause their paths to change randomly, thereby increasing the probability of collision; 2. The rising bubbles will form a low-pressure wake region behind them. If smaller, faster bubbles behind them enter this wake region, they will be accelerated and "captured", catch up with the bubbles in front and merge with them; this is a very important fluid dynamic mechanism that leads to merging.

[0006] Secondly, a wastewater treatment aeration device with announcement number CN 221644692 U uses an aeration pump to draw in outside air from several air inlets and then transmits it into an aeration box through two aeration pipes. Simultaneously, the air is transmitted to two L-shaped rotating pipes, and finally, through several aeration holes, the filtered and oil-removed kitchen waste wastewater inside the aeration box undergoes an aeration reaction. Furthermore, the four L-shaped rotating pipes rotate around the top of the aeration pipes due to the airflow, accelerating the airflow and improving the efficiency of the aeration reaction. The arrangement of the aeration pipes in this design precisely meets the aforementioned conditions for bubble fusion. Because the bubbles generated by aeration are continuously produced at the same location, and the distance between the bubbles is too close, the condition that the low-pressure wake zone easily captures and fuses small bubbles is met.

[0007] To address the aforementioned issues, the applicant provides an oil separation solution that increases the distance between adjacent bubbles, reduces the bubble fusion rate, and ensures the effectiveness of oil spill removal. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a wastewater oil separation and purification sedimentation tank. Through the inclined aeration pipes and the rotation effect of the aeration pipes, the bubbles are kept at a certain distance during the movement, avoiding the distance between adjacent bubbles being too close, reducing the probability of bubble merging, and ensuring the effect of oil removal.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A wastewater oil separation and purification sedimentation tank is provided, with an oil storage tank on one side of the sedimentation tank, an aeration mechanism inside the sedimentation tank, and an oil scraping mechanism at the top of the sedimentation tank; an oil scraping port is provided at the top of one side of the sedimentation tank, and the oil scraping mechanism scrapes the floating oil along the oil scraping port to the oil storage tank; the sedimentation tank is provided with a water inlet and a water outlet, and a sludge removal port at the bottom for sludge removal after drainage.

[0011] The aeration mechanism includes a motor, an air collection chamber, an aeration pipe, an air inlet pipe, a support plate, and an isolation protective cover. The support plate is fixedly connected to the inner wall of the sedimentation tank at both ends, and the isolation protective cover is fixedly connected to the bottom of the support plate to form a protective cavity. The protective cavity is connected to a pre-set through hole on the outer wall of the sedimentation tank. The motor is fixed to the outer wall of the sedimentation tank, and a pulley is provided at the end of the motor shaft. A through pipe is provided on the air collection chamber, rotatably connected to the support plate, and a pulley is provided on the through pipe, connected to the pulley at the end of the motor shaft via a belt. The pulley and belt are located inside the isolation protective cover. A rotary joint is provided at the end of the through pipe, and one end of the air inlet pipe is connected to the rotary joint, while the other end is connected to an air supply device located outside the sedimentation tank. Several aeration pipes are provided and evenly fixedly connected to the air collection chamber, and evenly arranged aeration nozzles are provided on the aeration pipes. The aeration pipes are angled to create a height difference between adjacent aeration nozzles on each aeration pipe, ensuring sufficient distance between adjacent bubbles during aeration and reducing the probability of bubble re-merging.

[0012] The support plate and the gas collection chamber are equipped with conical covers, which can reduce the amount of debris deposited on the support plate and the gas collection chamber.

[0013] The oil storage tank is equipped with an oil drain port at the bottom.

[0014] The oil scraping mechanism includes an electric actuator, a scraper, and a guide shaft. The electric actuator is fixed to the outer wall of the sedimentation tank. The scraper is provided with a guide shaft, which is slidably connected to the side wall of the sedimentation tank. The end of the guide shaft is provided with a rotating shaft, which is rotatably connected to a fixed block preset on the scraper. The scraper is provided with an obliquely arranged limiting frame. The top end of the electric actuator is provided with a fixedly connected control rod, and both ends of the control rod are located within the limiting frame.

[0015] Furthermore, the scraper is provided with a limiting plate, which is located below the rotating shaft. The width of the limiting plate extends to one side of the rotating shaft so that it can cooperate with the guide shaft to limit the rotation angle of the scraper.

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] 1) This solution includes an aeration mechanism, in which the aeration pipes are angled, resulting in different heights of the aeration nozzles on each aeration pipe. This height difference creates a height difference between the bubbles ejected from adjacent aeration nozzles, and in the vertical direction, it creates a distance between the bubbles, thereby reducing the phenomenon of re-merging during the ascent of adjacent bubbles. Furthermore, the motor can also drive the aeration pipes to rotate, thus changing the distance between bubbles in the horizontal direction. By creating distance between bubbles in both the horizontal and vertical directions, the probability of re-merging between adjacent bubbles is reduced, thereby ensuring the efficiency of the bubbles carrying oil upward.

[0018] Compared to dispersed bubbles, the total area of ​​the merged bubbles is significantly smaller, which reduces the aeration efficiency of the bubbles for oil flotation. Furthermore, the rising speed of large bubbles is much higher than that of small bubbles, meaning that the contact time between the bubbles and the water is shorter, further reducing the oil flotation efficiency. The above-mentioned aeration device configuration can effectively change these problems and greatly improve the aeration effect.

[0019] 2) Furthermore, the electric actuator pushes the scraper along the guide shaft to scrape the floating oil on the surface of the wastewater into the oil storage tank through the scraper port. When the electric actuator retracts, it presses the limit frame through the control shaft, causing the scraper to rotate a certain angle around the pivot, thereby causing the end of the scraper to lift up and detach from the wastewater surface, thus avoiding the drawback of scraping the surface oil back. When the electric actuator pushes out again, it will push the scraper back flat under the action of the limit frame, and then push it along the guide shaft. At this time, the use of the limit plate can prevent the scraper from rotating too much, and finally keep the limit plate in a vertical state to scrape the oil smoothly. Attached Figure Description

[0020] Appendix Figure 1 This utility model discloses a structural schematic diagram of a wastewater oil separation and purification sedimentation tank. Figure 1 ;

[0021] Appendix Figure 2 This utility model discloses a structural schematic diagram of a wastewater oil separation and purification sedimentation tank. Figure 2 ;

[0022] Appendix Figure 3 This is a schematic diagram of the internal structure of a sedimentation tank. Figure 1 ;

[0023] Appendix Figure 4 This is a schematic diagram of the internal structure of a sedimentation tank. Figure 2 ;

[0024] Appendix Figure 5 This is a schematic diagram of the aeration mechanism;

[0025] Appendix Figure 6 This is a schematic diagram of the scraper's structure;

[0026] Appendix Figure 7 This is a schematic diagram of the oil scraping mechanism;

[0027] Appendix Figure 8 This is a schematic diagram of the aeration pipe.

[0028] In the diagram: 1. Sedimentation tank; 11. Oil skimmer; 12. Drain; 13. Water inlet; 14. Sludge removal outlet;

[0029] 2. Oil reservoir; 21. Oil drain port;

[0030] 3. Oil scraping mechanism; 31. Electric actuator; 311. Control lever; 32. Scraper; 321. Limiting plate; 322. Limiting frame; 33. Guide shaft; 331. Rotating shaft;

[0031] 4. Aeration mechanism; 41. Motor; 42. Air collection chamber; 421. Through pipe; 43. Aeration pipe; 431. Aeration nozzle; 44. Air inlet pipe; 45. Rotary joint; 46. Support plate; 461. Conical cover; 47. Isolation protective cover. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-8 The technical solution of this utility model will be further described in detail below.

[0033] A wastewater oil separation and purification sedimentation tank is provided. The sedimentation tank 1 has an oil storage tank 2 on one side, an aeration mechanism 4 inside the sedimentation tank 1, and an oil skimming mechanism 3 on the top of the sedimentation tank 1. An oil skimming port 11 is provided on the top of one side of the sedimentation tank 1. The oil skimming mechanism 3 scrapes the floating oil along the oil skimming port 11 to the oil storage tank 2. The sedimentation tank 1 has a water inlet 13 and a water outlet 12 on the top, and a sludge removal port 14 at the bottom for sludge removal after drainage. The water inlet and drainage technologies adopt existing technologies to ensure normal drainage.

[0034] The aeration mechanism 4 includes a motor 41, an air collection chamber 42, an aeration pipe 43, an air inlet pipe 44, a support plate 46, and an isolation protective cover 47. The support plate 46 is fixedly connected to the inner wall of the sedimentation tank 1 at both ends, and the isolation protective cover 47 is fixedly connected to the bottom of the support plate 46 to form a protective cavity. The protective cavity is connected to a pre-set through hole on the outer wall of the sedimentation tank 1. The motor 41 is fixed to the outer wall of the sedimentation tank 1, and a pulley is provided at the shaft end of the motor 41. A through pipe 421 is provided on the air collection chamber 42, which is rotatably connected to the support plate 46. A pulley is provided on the through pipe 421 and connected to the support plate 46 via a belt. The motor 41 shaft pulley is connected to the belt; the pulley and belt are located inside the isolation protective cover 47; the end of the through pipe 421 is provided with a rotary joint 45, one end of the air inlet pipe 44 is connected to the rotary joint 45, and the other end is connected to the air supply equipment set outside the sedimentation tank 1; the aeration pipe 43 is provided with several evenly fixed and connected to the air collection chamber 42, and the aeration pipe 43 is provided with evenly arranged aeration nozzles 431; the aeration pipe 43 is set at an angle; so that a height difference is formed between adjacent aeration nozzles on each aeration pipe 43, so that the distance between adjacent bubbles is far enough during aeration, thereby reducing the probability of bubble re-merging.

[0035] The support plate 46 and the gas collection chamber 42 are provided with a conical cover 461, which can reduce the amount of debris deposited on the support plate 46 and the gas collection chamber 42.

[0036] The oil storage tank 2 is provided with an oil drain port 21 at the bottom.

[0037] The oil scraping mechanism 3 includes an electric actuator 31, a scraper 32, and a guide shaft 33. The electric actuator 31 is fixed to the outer wall of the sedimentation tank 1. The scraper 32 is provided with a guide shaft 33, which is slidably connected to the side wall of the sedimentation tank 1. The end of the guide shaft 33 is provided with a rotating shaft 331, which is rotatably connected to a fixed block preset on the scraper 32. The scraper 32 is provided with an obliquely arranged limiting frame 322. The top end of the electric actuator 31 is provided with a fixedly connected control rod 311, and both ends of the control rod 311 are located within the limiting frame 322.

[0038] Furthermore, the scraper 32 is provided with a limiting plate 321, which is located below the rotating shaft 331. The width of the limiting plate 321 extends to one side of the rotating shaft 331 so that it can cooperate with the guide shaft 33 to limit the rotation angle of the scraper 32.

[0039] A wastewater oil-water separation and purification sedimentation tank operates as follows:

[0040] Wastewater enters through inlet 13 and is then aerated by aeration mechanism 4 to raise the floating oil in the water. During aeration, motor 41 drives the air collection chamber 42 and aeration pipe 43 to rotate around the through pipe 421. During rotation, the bubbles sprayed from aeration nozzle 431 can move away from each other, creating a distance difference in both the horizontal and vertical directions. This reduces the probability of adjacent bubbles merging again, thus ensuring the efficiency of the bubbles carrying oil to the surface.

[0041] Furthermore, the electric actuator 31 pushes the scraper 32 along the guide shaft 33 to scrape the floating oil on the surface of the wastewater along the oil scraping port 11 to the oil storage tank 2. When the electric actuator 31 retracts, it presses the limit frame 322 through the control rod 311, causing the scraper 32 to rotate a certain angle around the pivot 331, thereby causing the end of the scraper 32 to lift up and detach from the wastewater surface, thus avoiding the drawback of scraping the surface floating oil back. When the electric actuator 31 pushes out again, it will push the scraper 32 back flat under the action of the limit frame 322, and then push it along the guide shaft 33. At this time, the use of the limit plate 321 can prevent the scraper 32 from rotating too much, so that the scraper 32 can keep in a vertical state and scrape the oil smoothly.

[0042] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.

[0044] In summary, the electronic or electrical components, including but not limited to electric actuators and motors, are existing components that are custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art and are not within the scope of protection of this invention.

[0045] In summary, the power systems, including but not limited to motors, electric actuators, and their respective transmission systems, are equipped with protective covers according to their actual installation locations to prevent wear or damage to the power and transmission systems caused by the external environment, thereby ensuring the normal operation of the power and transmission systems.

[0046] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A wastewater oil-water separation and purification sedimentation tank, wherein an oil storage tank is provided on one side of the sedimentation tank, characterized in that... The sedimentation tank is equipped with an aeration mechanism inside and an oil skimming mechanism at the top. An oil skimming port is located on the top side of the sedimentation tank, through which the oil skimming mechanism scrapes the floating oil to the oil storage tank. The sedimentation tank is equipped with a water inlet and a water outlet, and a sludge removal port at the bottom for sludge removal after drainage. The aeration mechanism includes a motor, an air collection chamber, an aeration pipe, an air inlet pipe, a support plate, and an isolation protective cover. The support plate is fixedly connected to the inner wall of the sedimentation tank at both ends, and the isolation protective cover is fixedly connected to the bottom of the support plate to form a protective cavity. The protective cavity is connected to a pre-set through hole on the outer wall of the sedimentation tank. The motor is fixed to the outer wall of the sedimentation tank, and a pulley is provided at the end of the motor shaft. A through pipe is provided on the air collection chamber, rotatably connected to the support plate, and a pulley is provided on the through pipe, connected to the pulley at the end of the motor shaft via a belt. The pulley and belt are located inside the isolation protective cover. A rotary joint is provided at the end of the through pipe, and one end of the air inlet pipe is connected to the rotary joint, while the other end is connected to an air supply device located outside the sedimentation tank. Several aeration pipes are provided and evenly fixedly connected to the air collection chamber, and evenly arranged aeration nozzles are provided on the aeration pipes. The aeration pipes are arranged at an angle, creating a height difference between adjacent aeration nozzles on each aeration pipe.

2. The wastewater oil-water separation and purification sedimentation tank according to claim 1, characterized in that... The support plate and the gas collection chamber are equipped with conical covers, which can reduce the amount of debris deposited on the support plate and the gas collection chamber.

3. The wastewater oil-water separation and purification sedimentation tank according to claim 1, characterized in that... The oil storage tank is equipped with an oil drain port at the bottom.

4. The wastewater oil-water separation and purification sedimentation tank according to claim 1, characterized in that... The oil scraping mechanism includes an electric actuator, a scraper, and a guide shaft. The electric actuator is fixed to the outer wall of the sedimentation tank. The scraper is provided with a guide shaft, which is slidably connected to the side wall of the sedimentation tank. The end of the guide shaft is provided with a rotating shaft, which is rotatably connected to a fixed block preset on the scraper. The scraper is provided with an obliquely arranged limiting frame. The top end of the electric actuator is provided with a fixedly connected control rod, and both ends of the control rod are located within the limiting frame.

5. A wastewater oil-water separation and purification sedimentation tank according to claim 4, characterized in that... The scraper is provided with a limiting plate, which is located below the rotating shaft. The width of the limiting plate extends to one side of the rotating shaft so that it can cooperate with the guide shaft to limit the rotation angle of the scraper.

Images