Oil-water separation device for sewage

Abstract

The invention discloses an oil-water separation device for sewage, and belongs to the technical field of sewage and oil stain separation, the oil-water separation device comprises a cooling precipitation tank and an oil-water separation assembly, and the cooling precipitation tank is communicated with the oil-water separation assembly through a connecting pipe; the cooling precipitation box is configured to reduce the temperature of the sewage for oil precipitation, and the stirring assembly is arranged on the cooling precipitation box and used for stirring in the cooling precipitation box. Through the synergistic effect of a cold water pipe of the condensation assembly and the low-temperature box, the temperature of sewage in the cooling precipitation box is reduced, oil is efficiently precipitated at a low temperature, meanwhile, the sewage is fully stirred through the stirring assembly, the precipitated oil is uniformly suspended in the sewage, oil drop aggregation is avoided, and the subsequent oil-water separation efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage and oil separation, in particular to an oil-water separation device for sewage. Background Art

[0002] In the traditional sewage treatment process, oil-water separation is an important link, because oil pollutants are extremely destructive to the environment and ecosystem. Existing oil-water separation technologies mainly rely on physical, chemical or biological methods to achieve the separation of oil and water. Physical methods include centrifugal separation, filtration and sedimentation; chemical methods involve the use of chemical reagents to change the surface tension of oil and water to promote separation; biological methods use microorganisms to degrade oil substances.

[0003] However, these methods are often costly and complicated to operate. In particular, the separation of oil-water mixtures in industrial wastewater and catering wastewater is particularly difficult because these wastewaters contain a large amount of grease, suspended matter and other pollutants, making oil-water separation more complicated. Therefore, in order to reduce the cost of oil-water separation and simplify the process of oil-water separation, an oil-water separation device for wastewater is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an oil-water separation device for sewage to solve the problem mentioned in the above background technology that traditional oil-water separation devices for sewage treatment are often costly and complicated to operate, especially in industrial sewage and catering sewage, where separation of oil-water mixtures is particularly difficult.

[0005] To achieve the above object, the present invention provides the following technical solution: an oil-water separation device for sewage, comprising a cooling precipitation box and an oil-water separation component, wherein the cooling precipitation box and the oil-water separation component are connected through a connecting pipe;

[0006] The cooling and precipitation tank is configured to reduce the temperature of the wastewater to precipitate oil, and includes:

[0007] The condensation assembly is passed through and fixedly installed on the cooling precipitation box, and is used to cool the sewage in the cooling precipitation box, including a condensation pipe for passing cold water and a low-temperature box for cooling the condensation pipe;

[0008] A stirring assembly is arranged on the cooling precipitation box and is used to stir the cooling precipitation box, comprising a main shaft and a rotating shaft rotating on the cooling precipitation box, a stirring blade 1 is fixedly connected to the main shaft, and a stirring blade 2 is fixedly connected to the rotating shaft;

[0009] As a further preferred embodiment of the present technical solution: the condenser comprises a cold water pipe, the cold water pipe is fixedly mounted on the cooling precipitation box, the cold water pipe is respectively provided with a water inlet and a water outlet, cold water is introduced into the water inlet, the low temperature box is fixedly mounted on the cooling precipitation box, a shunt box is fixedly mounted on the low temperature box, an air inlet is provided on the shunt box, and the air inlet is connected to an external air conditioning device for introducing cool air;

[0010] As a further preferred embodiment of the technical solution: a driving wheel is fixedly mounted on the main shaft, a driven wheel is fixedly mounted on the rotating shaft, and a transmission belt is provided between the driving wheel and the driven wheel;

[0011] As a further preferred embodiment of the present technical solution: the first stirring blade and the second stirring blade are staggered with the cold water pipe;

[0012] As a further preferred embodiment of the present technical solution: the oil-water separation assembly comprises a separation box and a filter plate, the filter plate is fixedly installed inside the separation box and is arranged at an angle, the filter plate divides the separation box into a flocculation chamber and a sewage chamber, a feed port is provided at the top of the flocculation chamber, and a drain port is provided at the sewage chamber;

[0013] As a further preferred embodiment of the technical solution: the separation box is provided with a cleaning door, the cleaning door is arranged on one side of the flocculation chamber, and the separation box is provided with a transparent through observation window;

[0014] As a further preferred embodiment of the technical solution: the cooling and precipitation box is provided with a sewage inlet on a side away from the oil-water separation component;

[0015] As a further preferred embodiment of the technical solution: the diverter box is connected to the cryogenic box via a plurality of pipes, and an exhaust port is provided on the cryogenic box;

[0016] As a further preferred embodiment of the present technical solution: the middle portion of the cold water pipe runs through the interior of the cooling precipitation box, the two ends of the cold water pipe are respectively exposed on both sides of the cooling precipitation box, and the low temperature box is arranged at both ends of the cold water pipe and wraps and isolates the cold water pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the temperature of the sewage in the cooling and precipitation box is reduced through the synergistic effect of the cold water pipe of the condensing assembly and the low temperature box, so that the oil is efficiently precipitated at a low temperature. At the same time, the sewage is fully stirred by the stirring assembly, so that the precipitated oil is evenly suspended in the sewage to avoid the aggregation of oil droplets, which greatly improves the efficiency of subsequent oil-water separation;

[0019] 2. The stirring blades on the main shaft and the rotating shaft fully stir the sewage under the drive of the transmission belt, so that the precipitated oil can be evenly suspended in the sewage to form a suspension, and the two sets of stirring blades are staggered with the cold water pipe to avoid interference during the stirring process, making the stirring more uniform, which can effectively improve the efficiency of oil-water separation and make the oil-water separation more thorough;

[0020] 3. In addition, the filter plate in the oil-water separation component is fixedly installed inside the separation box and is set at an angle, which divides the separation box into a flocculation chamber and a sewage chamber, making it easier for oil to gather under the action of gravity, making it easier for staff to clean up the oil, and reducing the difficulty and workload of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of an oil-water separation device for sewage according to the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of a cooling and precipitation box of an oil-water separation device for sewage according to the present invention;

[0023] Figure 3 It is a structural schematic diagram of a condensation assembly of an oil-water separation device for sewage according to the present invention;

[0024] Figure 4 It is a structural schematic diagram of a condensation assembly of an oil-water separation device for sewage according to the present invention;

[0025] Figure 5 It is a structural schematic diagram of the oil-water separation component;

[0026] Figure 6 Schematic diagram of the internal structure of the oil-water separation component.

[0027] In the figure: 1. Cooling and precipitation box; 2. Oil-water separation component; 3. Stirring assembly; 4. Condensation assembly; 21. Separation box; 22. Filter plate; 23. Flocculation chamber; 24. Sewage chamber; 25. Feed inlet; 26. Drain outlet; 27. Cleaning door; 28. Observation window; 31. Main shaft; 32. Rotating shaft; 33. Driving wheel; 34. Driven wheel; 35. Transmission belt; 36. Stirring blade one; 37. Stirring blade two; 41. Low temperature box; 42. Condenser; 421. Cold water pipe; 422. Water inlet; 423. Water outlet; 43. Diverter box; 44. Air inlet; 45. Exhaust outlet; 5. Connecting pipe; 6. Sewage inlet. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example

[0030] See also Figure 1-Figure 6 As shown, the present invention provides a technical solution: an oil-water separation device for sewage, comprising a cooling precipitation box 1 and an oil-water separation component 2, wherein the cooling precipitation box 1 and the oil-water separation component 2 are connected via a connecting pipe 5;

[0031] The cooling and precipitation tank 1 is configured to reduce the temperature of the wastewater and precipitate the oil, and includes:

[0032] The condensation assembly 4 is passed through and fixedly mounted on the cooling precipitation box 1, and is used to cool the sewage in the cooling precipitation box 1, and includes a condensation pipe 42 for passing cold water and a low-temperature box 41 for cooling the condensation pipe 42;

[0033] The stirring assembly 3 is arranged on the cooling precipitation box 1 for stirring the cooling precipitation box 1, including a main shaft 31 and a rotating shaft 32 rotating on the cooling precipitation box 1, a stirring blade 1 36 is fixedly connected to the main shaft 31, and a stirring blade 2 37 is fixedly connected to the rotating shaft 32.

[0034] In this embodiment, specifically: the condenser 42 includes a cold water pipe 421, the cold water pipe 421 is fixedly installed in the cooling precipitation box 1, and the cold water pipe 421 is respectively provided with a water inlet 422 and a water outlet 423, and cold water is introduced into the water inlet 422. The low-temperature box 41 is fixedly installed on the cooling precipitation box 1, and a diversion box 43 is fixedly installed on the low-temperature box 41. The diversion box 43 is provided with an air inlet 44, and the air inlet 44 is connected to an external air-conditioning device for introducing cool air. The cold water pipe 421 of the condenser 42 is made of a copper tube with good thermal conductivity.

[0035] In this embodiment, specifically: a driving wheel 33 is fixedly mounted on the main shaft 31 , a driven wheel 34 is fixedly mounted on the rotating shaft 32 , and a transmission belt 35 is provided between the driving wheel 33 and the driven wheel 34 .

[0036] In this embodiment, specifically: the stirring blade 1 36 and the stirring blade 2 37 are both staggered with respect to the cold water pipe 421 .

[0037] In this embodiment, specifically: the oil-water separation component 2 includes a separation box 21 and a filter plate 22, the filter plate 22 is fixedly installed inside the separation box 21 and is inclined, the filter plate 22 divides the separation box 21 into a flocculation chamber 23 and a sewage chamber 24, a feed port 25 is provided at the top of the flocculation chamber 23, and a drain port 26 is provided at the sewage chamber 24, the interior is divided into the flocculation chamber 23 and the sewage chamber 24 by the inclined filter plate 22, the feed port 25 at the top of the flocculation chamber 23 is used to receive sewage from the cooling and precipitation box 1 and add flocculants, the drain port 26 of the sewage chamber 24 is used to discharge the treated sewage, the inclined structure of the filter plate 22 facilitates the accumulation of oil and dirt to the cleaning door 27, the observation window 28 is made of high-strength organic glass coated with an anti-fog coating, and the sealing is ensured by a sealing rubber strip, so as to facilitate the observation of the oil and dirt deposition in the flocculation chamber 23.

[0038] In this embodiment, specifically: a cleaning door 27 is provided on the separation box 21 , and the cleaning door 27 is arranged on one side of the flocculation chamber 23 ; and a transparent through observation window 28 is provided on the separation box 21 .

[0039] In this embodiment, specifically: the cooling and precipitation box 1 is provided with a sewage inlet 6 on a side away from the oil-water separation component 2 .

[0040] In this embodiment, specifically: the diverter box 43 is connected to the low temperature box 41 via a plurality of pipes, and an exhaust port 45 is provided on the low temperature box 41. .

[0041] In this embodiment, specifically: the middle part of the cold water pipe 421 runs through the interior of the cooling and precipitation box 1, and the two ends of the cold water pipe 421 are respectively exposed on both sides of the cooling and precipitation box 1. The low-temperature box 41 is arranged at both ends of the cold water pipe 421 and wraps and isolates the cold water pipe 421. The low-temperature box 41 introduces cool air from the external air-conditioning equipment through the diverter box 43. After the cool air enters the diverter box 43 through the air inlet 44, it is evenly dispersed and enters the low-temperature box 41 through multiple pipes under the action of the guide structure (431) in the diverter box 43. The low-temperature box 41 is wrapped around the two ends of the cold water pipe 421 of the condenser 42 to cool the water in the cold water pipe 421 to ensure the temperature of the cool water.

[0042] Working principle or structural principle: when separating oil and water in sewage treatment, first connect the sewage pipe to the sewage inlet 6, which is arranged on one side of the cooling precipitation box 1 near the bottom, so that the sewage enters the cooling precipitation box 1 through the sewage inlet 6, and cool water is introduced into the water inlet 422, and the cool water flows out from the water outlet 423 after passing through the tortuous pipe of the cold water pipe 421. At the same time, connect the air outlet of the external air-conditioning equipment to the air inlet 44, and the cool air enters the low-temperature box 41 through the multiple connecting pipes 5 between the diverter box 43 and the low-temperature box 41. Since there are multiple connecting pipes 5 between the low-temperature box 41 and the condenser pipe 42, the cool air can be evenly dispersed when entering the low-temperature box 41, and the cool air further ensures the low temperature of the water in the cold water pipe 421. When the sewage enters the cooling precipitation box 1, the sewage and the condenser pipe 42 exchange heat and the temperature is reduced. At this time, under the effect of the low temperature, the oil is precipitated from the sewage;

[0043] The main shaft 31 is driven to rotate by an external driving device (not shown) such as a motor, and the main shaft 31 drives the rotating shaft 32 to rotate through the transmission belt 35. At this time, the stirring blade 1 36 and the stirring blade 2 37 stir the sewage in the cooling and precipitation box 1, so that the precipitated oil can be suspended in the sewage;

[0044] After cooling and precipitation, the sewage enters the separation box 21 through the connecting pipe 5, and the flocculant is added to the separation box 21 through the feed port 25, so that the suspended oil block particles can be flocculated into larger flocs and sink to the bottom. The filter plate 22 filters the flocculated sewage, so that the deoiled sewage is discharged through the drain port 26, and the oil is deposited in the flocculation chamber 23. The staff observes the deposition state of the oil in the flocculation chamber 23 through the observation window 28, and cleans the oil in the separation box 21 by opening the cleaning door 27, thereby completing the oil-water separation of the sewage.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-water separation device for sewage, characterized in that: It comprises a cooling and precipitation box (1) and an oil-water separation component (2), wherein the cooling and precipitation box (1) and the oil-water separation component (2) are connected via a connecting pipe (5); The cooling and precipitation tank (1) is configured to reduce the temperature of the wastewater to precipitate oil, and comprises: A condensation assembly (4) is passed through and fixedly mounted on the cooling precipitation box (1) and is used to cool the sewage in the cooling precipitation box (1), and comprises a condensation pipe (42) for introducing cold water and a low-temperature box (41) for cooling the condensation pipe (42); The stirring assembly (3) is arranged on the cooling precipitation box (1) and is used for stirring the cooling precipitation box (1). The stirring assembly (3) comprises a main shaft (31) and a rotating shaft (32) rotating on the cooling precipitation box (1). The main shaft (31) is fixedly connected to a stirring blade 1 (36), and the rotating shaft (32) is fixedly connected to a stirring blade 2 (37).

2. The oil-water separation device for sewage according to claim 1, characterized in that: The condenser (42) comprises a cold water pipe (421), the cold water pipe (421) is fixedly mounted on the cooling precipitation box (1), a water inlet (422) and a water outlet (423) are respectively arranged on the cold water pipe (421), and cold water is introduced into the water inlet (422); the low temperature box (41) is fixedly mounted on the cooling precipitation box (1), a diversion box (43) is fixedly mounted on the low temperature box (41), and an air inlet (44) is provided on the diversion box (43), and the air inlet (44) is connected to an external air conditioning device for introducing cool air.

3. The oil-water separation device for sewage according to claim 2, characterized in that: A driving wheel (33) is fixedly mounted on the main shaft (31), a driven wheel (34) is fixedly mounted on the rotating shaft (32), and a transmission belt (35) is provided between the driving wheel (33) and the driven wheel (34).

4. The oil-water separation device for sewage according to claim 3, characterized in that: The first stirring blade (36) and the second stirring blade (37) are both staggered with respect to the cold water pipe (421).

5. The oil-water separation device for sewage according to claim 4, characterized in that: The oil-water separation component (2) comprises a separation box (21) and a filter plate (22). The filter plate (22) is fixedly installed inside the separation box (21) and is arranged at an angle. The filter plate (22) divides the separation box (21) into a flocculation chamber (23) and a sewage chamber (24). A feed inlet (25) is provided at the top of the flocculation chamber (23), and a drain outlet (26) is provided at the sewage chamber (24).

6. The oil-water separation device for sewage according to claim 5, characterized in that: The separation box (21) is provided with a cleaning door (27), and the cleaning door (27) is arranged on one side of the flocculation chamber (23). The separation box (21) is provided with a transparent through-going observation window (28).

7. The oil-water separation device for sewage according to claim 6, characterized in that: The cooling and precipitation box (1) is provided with a sewage inlet (6) on a side away from the oil-water separation component (2).

8. The oil-water separation device for sewage according to claim 7, characterized in that: The diverter box (43) is connected to the low-temperature box (41) via a plurality of pipes, and an exhaust port (45) is provided on the low-temperature box (41).

9. The oil-water separation device for sewage according to claim 8, characterized in that: The middle portion of the cold water pipe (421) passes through the interior of the cooling and precipitation box (1), and both ends of the cold water pipe (421) are respectively exposed on both sides of the cooling and precipitation box (1). The low-temperature box (41) is arranged at both ends of the cold water pipe (421) and wraps and isolates the cold water pipe (421).

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