An oil-water separator

Abstract

The utility model discloses an oil-water separator, including a tank body arranged underground, a water inlet and a water outlet are arranged on the tank body, a primary sewage pool, a deep purification pool and a clean water pool are arranged in sequence between the water inlet and the water outlet, a first partition is arranged between the primary sewage pool and the deep purification pool, a second partition is arranged between the deep purification pool and the clean water pool, a first water pipe connecting the primary sewage pool and the deep purification pool is arranged on the first partition, a second water pipe connecting the deep purification pool and the clean water pool is arranged between the second partitions, the lower end of the second water pipe is located in the deep purification pool, an oil overflow hole is arranged on the deep purification pool, and the higher end of the second water pipe in the clean water pool is located at the same height as the oil overflow hole. Compared with the prior art, the utility model removes heavy oil with a relative density greater than 1 and suspended oil with a particle size greater than 100um by gravity separation, and can also remove solid suspended matter. The overall structure is simple, and the manufacturing difficulty and cost are low.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-water separation, in particular to an oil-water separator. Background Art

[0002] Grease trap is a wastewater pretreatment structure that uses the density difference between oil droplets and water to produce a flotation effect to remove floating oil substances in oily wastewater. Grease traps are mostly constructed in a horizontal flow type. Oily wastewater enters the rectangular grease trap through a water distribution tank and flows slowly in a horizontal direction. During the flow, the oil floats to the surface of the water and is pushed into the oil collection pipe by an oil collection pipe or an oil scraper installed on the surface of the tank and flows into the dewatering tank. The wastewater treated by the oil trap overflows into the drainage channel and is discharged outside the tank for subsequent treatment to remove emulsified oil and other pollutants. The patent with publication number CN213012089U discloses a glass fiber reinforced plastic grease trap, including a glass fiber reinforced plastic tank body, a sewage inlet is arranged at the front end of the glass fiber reinforced plastic tank body, a residue filter box is arranged at the end where the sewage inlet extends, and a plurality of partitions are arranged at a certain interval behind the residue filter box, the bottom of the partition is connected to the bottom of the glass fiber reinforced plastic tank body, and a distance is reserved between the top and the top of the glass fiber reinforced plastic tank body, the partition divides the interior of the glass fiber reinforced plastic tank body into a plurality of oil-trapping tanks, and divides the last section of the glass fiber reinforced plastic tank body into a water purification chamber, and an oil floating area is formed between the top of the partition and the top of the glass fiber reinforced plastic tank body, a drain pipe is arranged at the lower part of the partition, the drain pipe is an L-shaped elbow, one end of the drain pipe is opened downward and arranged in the previous oil-trapping tank, and the other end of the drain pipe is arranged in the next oil-trapping tank or the water purification chamber, a purification device is arranged in the water purification chamber, a drain outlet is arranged at the rear end of the glass fiber reinforced plastic tank body, one end of the drain outlet is connected to the upper end of the purification device, the overall structure is relatively complex, and the manufacturing cost is high. Utility Model Content

[0003] The utility model provides an oil-water separator, which is used to solve the problems of complex structure and high cost of the existing grease trap.

[0004] The utility model provides an oil-water separator, comprising a tank body arranged underground, a water inlet and a water outlet being arranged on the tank body, a primary sewage pool, a deep purification pool and a clean water pool being arranged in sequence between the water inlet and the water outlet, a first partition being arranged between the primary sewage pool and the deep purification pool, a second partition being arranged between the deep purification pool and the clean water pool, a first water pipe communicating with the primary sewage pool and the deep purification pool being arranged on the first partition, a second water pipe communicating with the deep purification pool and the clean water pool being arranged between the second partitions, a lower end of the second water pipe being located in the deep purification pool, an oil overflow hole being arranged on the deep purification pool, and a higher end of the second water pipe in the clean water pool being located at the same height as the oil overflow hole.

[0005] Preferably, an inspection hole is provided at the upper end of the primary sewage tank.

[0006] Preferably, the deep purification tank and the clean water tank are both provided with cleaning holes.

[0007] Preferably, the diameter of the inspection hole is larger than the diameter of the cleaning hole.

[0008] Preferably, there are two of each of the first water conduit and the second water conduit.

[0009] Preferably, the second water conduit is a curved pipe, and the opening of the lower end of the curved pipe faces downward.

[0010] Preferably, the first water conduit is a horizontal pipe arranged at the lower end of the first partition.

[0011] Preferably, the water inlet is located 10 to 30 cm below the top of the tank body.

[0012] Preferably, there are two water inlets, which are located at both ends of the tank body, there are two primary sewage tanks and two deep purification tanks, and the clean water tank is arranged between the two deep purification tanks.

[0013] Preferably, there are two water outlets, and the two water outlets are distributed on both sides of the clear water tank.

[0014] Compared with the prior art, the utility model sets up a primary sewage pool, a deep purification pool and a clear water pool, and cooperates with the first water conduit, the second water conduit and the oil overflow hole to form a floating oil area, a clear water area, a sedimentation area and a sediment area in the deep purification pool, removes heavy oil with a relative density greater than 1 and suspended oil with a particle size greater than 100um by gravity separation, and can also remove solid suspended matter with a larger density. The overall structure is simple, and the manufacturing difficulty and cost are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a front view of the first embodiment of the present utility model;

[0017] Figure 2 It is a top view of the first embodiment of the utility model;

[0018] Figure 3 It is a left side view of the first embodiment of the utility model;

[0019] Figure 4 It is a right side view of the first embodiment of the utility model;

[0020] Figure 5 This is a front view of the second embodiment of the present utility model;

[0021] Figure 6 It is a top view of the second embodiment of the utility model;

[0022] Figure 7 It is a left side view of the second embodiment of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the deep purification pool of the utility model.

[0024] Reference numerals:

[0025] 1. Tank body, 2. Water inlet pipe, 3. Water outlet pipe, 4. Primary sewage tank, 5. Deep purification tank, 6. Clean water tank, 7. First baffle, 8. Second baffle, 9. First water pipe, 10. Second water pipe, 11. Oil overflow hole, 12. Inspection hole, 13. Cleaning hole, 01. Floating oil area, 02. Clean water area, 03. Sedimentation area, 04. Sediment area. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See attached Figure 1 and attached Figure 2This embodiment provides an oil-water separator, including a tank body 1 arranged underground, which can minimize the impact on the surrounding environment, and secondly, it is also conducive to protecting the tank body 1 from damage. The tank body 1 is provided with a water inlet and a water outlet, and a primary sewage pool 4, a deep purification pool 5 and a clean water pool 6 are arranged in sequence between the water inlet and the water outlet. A first partition 7 is arranged between the primary sewage pool 4 and the deep purification pool 5, and a second partition 8 is arranged between the deep purification pool 5 and the clean water pool 6. A first water pipe 9 connecting the primary sewage pool 4 and the deep purification pool 5 is arranged on the first partition 7, and a second water pipe 10 connecting the deep purification pool 5 and the clean water pool 6 is arranged between the second partition 8. The lower end of the second water pipe 10 is located in the deep purification pool 5, and an oil overflow hole 11 is arranged on the deep purification pool 5. The higher end of the second water pipe 10 in the clean water pool 6 is located at the same height as the oil overflow hole 11. The oil-water separator is mainly used for removing heavy oil with a relative density greater than 1 and suspended oil with a particle size greater than 100um by gravity separation. At the same time, it can also be used as a sedimentation tank to remove solid suspended matter with high density. The oily water enters the primary sewage tank 4 from the water inlet, undergoes primary sedimentation and oil separation in the primary sewage tank 4, and then enters the deep purification tank 5 through the first water pipe 9, undergoes horizontal oil separation and sedimentation in the deep purification tank 5, and finally enters the clean water tank 6 through the second water pipe 10. The clean water is discharged through the water outlet on the clean water tank 6, and the floating oil is discharged through the oil overflow hole 11 on the deep purification tank 5. For details, refer to the attached Figure 8 The deep purification tank 5 is divided into an oil floating area 01, a clean water area 02, a sedimentation area 03 and a sedimentation area 04 from top to bottom. The oil overflow hole 11 is arranged in the oil floating area 01, and is used to discharge the oil floating area 01. The lower end of the second water pipe 10 is arranged in the clean water area 02, and is used to discharge the clean water to the clean water tank 6. The first water pipe 9 is located between the sedimentation area 03 and the sedimentation area 04. The sedimentation area 03 is mainly used to precipitate heavy oil and suspended solids, and the heavy oil and suspended solids will eventually accumulate in the sedimentation area 04.

[0029] Specifically, the water inlet is connected to the water inlet pipe 2, and the water outlet is connected to the water outlet pipe 3. Clean water is discharged to the ditch through the water outlet pipe 3. The water inlet pipe 2 and the water outlet pipe 3 are both buried underground.

[0030] As another implementation mode of the present utility model: an inspection hole 12 is provided at the upper end of the primary sewage tank 4 , and the inspection hole 12 is used to check and clean the primary sewage tank 4 .

[0031] As another embodiment of the present utility model: the deep purification tank 5 and the clean water tank 6 are both provided with cleaning holes 13 , and the heavy oil and suspended solids in the sediment area 04 are cleaned out from the cleaning holes 13 at regular intervals.

[0032] Specifically, the diameter of the inspection hole 12 is larger than the diameter of the cleaning hole 13 .

[0033] As another embodiment of the present invention: Figure 3 and attached Figure 4 There are two first water pipes 9 and two second water pipes 10 . The two first water pipes 9 are distributed laterally along the symmetry line of the tank body 1 , and the two second water pipes 10 are distributed laterally along the symmetry line of the tank body 1 .

[0034] An implementation manner of the second water conduit 10: the second water conduit 10 is a curved pipe, and the opening of the lower end of the curved pipe faces downward.

[0035] Another implementation manner of the second water conduit 10: the second water conduit 10 is an inclined tube, and the opening of the lower end of the inclined tube faces downward.

[0036] As another embodiment of the present invention: the first water pipe 9 is a horizontal pipe arranged at the lower end of the first partition 7. Specifically, the center of the horizontal pipe is about 30 cm from the bottom, so as to ensure that the vertical distance of the sedimentation area 03 is high enough to ensure the sedimentation effect.

[0037] As another embodiment of the present utility model: the water inlet is located 10 to 30 cm below the top of the tank body 1, and the water outlet is located 10 to 30 cm below the top of the tank body 1. This structural design is used to ensure the structural strength of the interface.

[0038] The tank body 1 is made of glass fiber reinforced plastic and has an ellipsoidal structure. The water inlet and the water outlet are respectively arranged at two ends of the tank body 1.

[0039] As another embodiment of the present invention: the bottom of the tank body 1 is provided with a bottom plate made of concrete.

[0040] Specifically, the length of the deep purification tank 5 is greater than the length of the primary sewage tank 4 and the length of the clean water tank 6 , and the oily water is mainly removed from the floating oil and the sediment in the deep purification tank 5 .

[0041] Embodiment 2

[0042] Refer to the attached Figure 5-6 This embodiment is basically the same as the first embodiment, except that:

[0043] There are two water inlets, which are located at both ends of the tank body 1 . There are two primary sewage tanks 4 and two deep purification tanks 5 . The clean water tank 6 is arranged between the two deep purification tanks 5 .

[0044] Refer to the attached Figure 7 As another embodiment of the present utility model: there are two water outlets, which are distributed on both sides of the clear water tank 6.

[0045] The oil-water separator provided by the utility model is applied under a bridge. There are many existing bridges. The oil-water separator provided by the utility model has a simple structure and low cost, and can reduce the difficulty of installation and use.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An oil-water separator, characterized in that: It comprises a tank body arranged underground, wherein the tank body is provided with a water inlet and a water outlet, a primary sewage pool, a deep purification pool and a clean water pool are arranged in sequence between the water inlet and the water outlet, a first partition is arranged between the primary sewage pool and the deep purification pool, a second partition is arranged between the deep purification pool and the clean water pool, a first water pipe connecting the primary sewage pool and the deep purification pool is arranged on the first partition, a second water pipe connecting the deep purification pool and the clean water pool is arranged between the second partitions, a lower end of the second water pipe is located in the deep purification pool, an oil overflow hole is arranged on the deep purification pool, and a higher end of the second water pipe in the clean water pool is located at the same height as the oil overflow hole.

2. The oil-water separator according to claim 1, characterized in that: An inspection hole is provided at the upper end of the primary sewage tank.

3. The oil-water separator according to claim 2, characterized in that: The deep purification tank and the clean water tank are both provided with cleaning holes.

4. The oil-water separator according to claim 3, characterized in that: The diameter of the inspection hole is larger than the diameter of the cleaning hole.

5. The oil-water separator according to claim 1, characterized in that: There are two first water conduits and two second water conduits.

6. The oil-water separator according to claim 5, characterized in that: The second water conduit is a curved pipe, and the opening of the lower end of the curved pipe faces downward.

7. The oil-water separator according to claim 6, characterized in that: The first water conduit is a horizontal pipe arranged at the lower end of the first partition plate.

8. The oil-water separator according to claim 1, characterized in that: The water inlet is located 10 to 30 cm below the top of the tank body.

9. The oil-water separator according to claim 8, characterized in that: There are two water inlets, which are located at two ends of the tank body. There are two primary sewage tanks and two deep purification tanks, and the clean water tank is arranged between the two deep purification tanks.

10. The oil-water separator according to claim 9, characterized in that: There are two water outlets, which are distributed on both sides of the clear water tank.

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