Vertical flow labyrinth grid oil-water separation tank

Abstract

The utility model discloses a perpendicular flow maze grid oil storage formula oil -water separation tank relates to oil -water separation technical field, including container, a plurality of baffle, oil collecting groove and water collecting tank, and the inside of container is equipped with the cavity, a plurality of baffle vertical setting in the cavity, and a plurality of baffle divide the cavity and separate the liquid inlet area, several separation zones and water outlet area that communicate in turn, and liquid can turn back and flow through liquid inlet area, separation zone and water outlet area, and the bottom of separation zone and water outlet area communicates, oil collecting groove sets up in the upper portion of separation zone, and overflow communication between oil collecting groove and separation zone, water collecting tank sets up in the upper portion of water outlet area, and overflow communication between water collecting tank and water outlet area, wherein, the overflow liquid level between oil collecting groove and separation zone is higher than the overflow liquid level between water collecting tank and water outlet area, the perpendicular flow maze grid oil storage formula oil -water separation tank of the utility model can improve the separation effect of oil -water mixture, and the separated grease is difficult to mix with waste water again.

Description

Technical Field

[0001] This utility model relates to the field of oil-water separation technology, and in particular to a vertical flow labyrinth oil-water separator. Background Technology

[0002] The catering industry frequently generates wastewater containing grease, i.e., oil-water mixtures. Animal fats tend to solidify upon cooling, and if this mixture is directly discharged into sewers, the solidified grease can cause blockages. Furthermore, the high organic content of these mixtures can negatively impact the treatment efficiency of downstream wastewater treatment plants. Therefore, it is often necessary to separate the oil-water mixture into grease and wastewater in the initial stages.

[0003] Gravity separation is a common method for separating grease and wastewater. However, many gravity oil-water separators have simple structures and insufficient oil-water residence time, resulting in less than ideal separation effects. Furthermore, after oil-water separation, the grease remaining in the upper layer of the separator may cool and clump, affecting subsequent separation. Additionally, the separated grease is impacted by the newly entering oil-water mixture and will remix with the wastewater. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a vertical flow labyrinth oil-water separator, which can improve the separation effect of oil-water mixtures, making it difficult for the separated grease to be remixed with wastewater.

[0005] A vertical flow labyrinth oil-water separator according to an embodiment of the present invention includes: a container, wherein the container has an internal cavity; Multiple partitions are vertically arranged in the cavity, dividing the cavity into a liquid inlet area, several separation areas and a water outlet area that are connected in sequence. The liquid can flow back and forth through the liquid inlet area, the separation area and the water outlet area. The bottom of the separation area and the water outlet area are connected. An oil collection tank is provided above the separation zone, and the oil collection tank and the separation zone are in overflow communication. A water collection trough is provided above the water outlet area, and the water collection trough and the water outlet area are in overflow communication. The overflow liquid level between the oil collection tank and the separation zone is higher than the overflow liquid level between the water collection tank and the water outlet zone.

[0006] The vertical flow labyrinth oil-water separator according to the embodiments of this utility model has at least the following beneficial effects: the oil-water mixture enters from the inlet area, and after flowing back and forth through several separation zones, the flow speed gradually slows down, making it easier for the oil-water mixture to separate into layers by gravity; the back and forth flow of the oil-water mixture in several separation zones greatly prolongs its flow path, increases the residence time of the oil-water mixture, and also facilitates the separation of the oil-water mixture; since the density of grease is less than that of wastewater, grease floats on the upper layer of wastewater, and grease can overflow into the oil collection tank in the separation zone, while wastewater enters from below into the outlet area and finally overflows from the outlet area into the water collection tank. The oil collection tank and the water collection tank are independent of each other, making it difficult for the separated grease to remix with the wastewater; the overflow liquid level between the oil collection tank and the separation zone is higher than the overflow liquid level between the water collection tank and the outlet area, which can minimize the possibility of wastewater entering the oil collection tank.

[0007] According to some embodiments of this utility model, the container is barrel-shaped, the water outlet area is located at the center of the container, the side closer to the center of the container is defined as the inner side, and the opposite side is the outer side, the separation area surrounds the outer side of the water outlet area, and an overflow channel for oil flow is formed between the outer wall of the water collection tank and the inner wall of the oil collection tank, and the inner wall of the oil collection tank gradually approaches the water collection tank from bottom to top.

[0008] According to some embodiments of the present invention, it also includes an oil storage tank, which is connected to the oil collection tank and has an oil storage space.

[0009] According to some embodiments of the present invention, the oil storage tank is disposed below the oil collection tank, and the oil storage tank is located in the separation zone.

[0010] According to some embodiments of the present invention, the oil storage tank is connected to an oil drain pipe, and the oil drain pipe is equipped with a valve.

[0011] According to some embodiments of this utility model, the water collection tank is connected to a drain pipe.

[0012] According to some embodiments of the present invention, the liquid inlet area is provided with a filter assembly, which is located at the upper part of the liquid inlet area, so that the liquid first flows through the filter assembly and then enters the liquid inlet area.

[0013] According to some embodiments of the present invention, the filter assembly includes a filter cake bucket, and the bucket wall of the filter cake bucket has a plurality of filter holes.

[0014] According to some embodiments of the present invention, it also includes a liquid inlet pipe, the outlet end of which extends into the interior of the filter cake bucket.

[0015] According to some embodiments of the present invention, the filter cake bucket has an opening at the top.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a first-view sectional view of the vertical flow labyrinth oil-water separator of this utility model embodiment; Figure 2 This is a schematic diagram of the vertical flow labyrinth oil-water separator according to an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the oil-water separation principle in an embodiment of this utility model; Figure 4 This is a partial cross-sectional view of a vertical flow labyrinth oil-water separator according to an embodiment of the present invention. Figure 5 This is a second-view sectional view of the vertical flow labyrinth oil-water separator of this utility model embodiment.

[0018] Icon labels: Container 100, liquid inlet area 110, separation area 120, water outlet area 130, baffle 200, oil collection tank 300, water collection tank 400, drain pipe 410, oil storage tank 500, oil discharge pipe 510, filter assembly 600, filter residue bucket 610, liquid inlet pipe 700. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] As described in the background section, common gravity-type oil-water separators have only one separation chamber. After the oil-water mixture enters the chamber, it remains still until the grease floats to the top of the wastewater, completing the stratification process. The grease on top is then extracted. If new oil-water mixture is added to the separation chamber, the water flow disturbs the existing grease and wastewater, easily causing the grease to remix with the wastewater, resulting in poor separation. Furthermore, if the grease remains on the top of the wastewater and cannot be extracted promptly, it will gradually cool and solidify, further affecting subsequent oil-water separation.

[0024] Reference Figure 1 and Figure 2 As shown, an embodiment of the vertical flow labyrinth oil-water separator of this utility model includes a container 100, multiple baffles 200, an oil collection tank 300, and a water collection tank 400. Figure 2 This is a plan view of a vertical flow labyrinth oil-water separator, not a direct sectional view.

[0025] The container 100 has an internal cavity; multiple partitions 200 are vertically arranged in the cavity, dividing the cavity into a liquid inlet zone 110, several separation zones 120, and a water outlet zone 130 that are connected in sequence. The liquid can flow back and forth through the liquid inlet zone 110, the separation zone 120, and the water outlet zone 130. The bottoms of the separation zone 120 and the water outlet zone 130 are connected. An oil collection tank 300 is arranged above the separation zone 120, and there is an overflow connection between the oil collection tank 300 and the separation zone 120. A water collection tank 400 is arranged above the water outlet zone 130, and there is an overflow connection between the water collection tank 400 and the water outlet zone 130. The overflow liquid level between the oil collection tank 300 and the separation zone 120 is higher than the overflow liquid level between the water collection tank 400 and the water outlet zone 130.

[0026] The container 100 can be barrel-shaped or a square pool, etc., as long as it has a cavity. Multiple baffles 200 are installed in the cavity, arranged vertically. The flow of liquid can be controlled by adjusting the height of the baffles 200. Specifically, the bottom of the baffle 200 is connected to the bottom of the cavity, allowing liquid to overflow only from the top of the baffle 200; a channel is provided between the baffle 200 and the bottom of the cavity, allowing liquid to flow from the bottom of the baffle 200. When two adjacent baffles 200 are arranged one above the other, the liquid can flow in both directions. The multiple baffles 200 also divide the cavity into multiple areas, defined as the inlet area 110, the separation area 120, and the outlet area 130. The oil-water mixture is fed into the cavity from the inlet area 110, with the flow direction sequentially from the inlet area 110, the separation area 120, and the outlet area 130. The baffle 200 divides the cavity into multiple regions. The first region is the liquid inlet zone 110, the last region is the water outlet zone 130, and the multiple intermediate regions are all separation zones 120. After the oil-water mixture undergoes multiple up-and-down flow cycles in the separation zones 120, the flow velocity gradually slows down and tends to stabilize. Furthermore, the long up-and-down flow paths and durations are conducive to the settling of wastewater and the floating of grease, i.e., gravity separation of oil and water.

[0027] In separation zone 120, grease floats on top of the wastewater. An oil collection tank 300 is located above separation zone 120, allowing grease to overflow into it. Separation zone 120 and effluent zone 130 are connected at the bottom, allowing wastewater from the bottom of separation zone 120 to enter effluent zone 130, while grease has difficulty entering from the bottom. A water collection tank 400 is located above effluent zone 130, allowing wastewater to overflow into it. It should be understood that during the initial operation of the vertical flow labyrinth oil-water separator, as the chamber fills, some grease may enter effluent zone 130 and subsequently effluent tank 400. Therefore, during the initial operation, the mixture in water collection tank 400 requires additional treatment. After the vertical flow labyrinth oil-water separator has been running for a period of time, the liquid level in the cavity rises, making it difficult for grease to enter the outlet zone 130 from the bottom. At this time, the water collection tank 400 can collect wastewater, and the oil collection tank 300 can collect grease. The grease and wastewater are difficult to mix again, resulting in a good separation effect.

[0028] The overflow level between the oil collection tank 300 and the separation zone 120 is higher than the overflow level between the water collection tank 400 and the water outlet zone 130. Even if the separation zone 120 does not contain grease, wastewater in the separation zone 120 will not overflow into the oil collection tank 300. The separation zone 120 and the water outlet zone 130 are connected. According to the principle of communicating vessels, wastewater will enter the water collection tank 400 from the lower overflow level between the water collection tank 400 and the water outlet zone 130.

[0029] Although the overflow level between the oil collection tank 300 and the separation zone 120 is higher than the overflow level between the water collection tank 400 and the outlet zone 130, grease can still overflow into the oil collection tank 300. This is because the density of grease is less than that of wastewater; under the same pressure, the oil level is greater than the water level. Figure 3 As shown, the interface between grease and wastewater in separation zone 120 (the dotted line in the diagram) has the same pressure as the wastewater surface at the same height in effluent zone 130. Furthermore, according to the liquid pressure formula P=ρgh, since ρ... 油 <ρ 水 If the pressure P remains constant, then h 油 >h 水 That is, the liquid level in the separation zone 120 must be higher than the liquid level in the outlet zone 130. Even when the overflow liquid level between the oil collecting tank 300 and the separation zone 120 is higher than the overflow liquid level between the water collecting tank 400 and the outlet zone 130, the upper layer of grease in the separation zone 120 can still overflow into the oil collecting tank 300. Of course, to allow more grease to overflow into the oil collecting tank 300, the overflow liquid level between the oil collecting tank 300 and the separation zone 120 should be as close as possible to the overflow liquid level between the water collecting tank 400 and the outlet zone 130. Preferably, the overflow liquid level between the oil collecting tank 300 and the separation zone 120 is 1 cm higher than the overflow liquid level between the water collecting tank 400 and the outlet zone 130.

[0030] It is understood that the container 100 is barrel-shaped, the water outlet area 130 is located in the center of the container 100, the side closer to the center of the container 100 is defined as the inner side, and the opposite side is the outer side. The separation area 120 surrounds the outer side of the water outlet area 130. An overflow channel for grease to flow is formed between the outer wall of the water collection tank 400 and the inner wall of the oil collection tank 300. From bottom to top, the inner wall of the oil collection tank 300 gradually approaches the water collection tank 400.

[0031] Reference Figure 4 As shown, the inner wall of the oil collecting tank 300 gradually approaches the water collecting tank 400, reducing the volume of the overflow channel. With the same volume of grease, the reduced volume of the overflow channel will increase the liquid level of the grease layer, thereby increasing the amount of grease overflowing into the oil collecting tank 300 and improving the grease separation effect.

[0032] Reference Figure 5 As shown, it can be understood that it also includes an oil storage tank 500, which is connected to the oil collection tank 300 and has an oil storage space.

[0033] Compared to the oil collection tank 300, the oil storage tank 500 can be set with a larger oil storage space, which is beneficial for storing grease and reduces the number of times grease is discharged from the vertical flow labyrinth oil-water separator, thus reducing the workload.

[0034] It is understandable that the oil storage tank 500 is located below the oil collection tank 300 and is located in the separation zone 120.

[0035] The oil storage tank 500 is located below the oil collection tank 300. Multiple through holes can be directly opened at the bottom of the oil collection tank 300 to allow grease to enter the oil storage tank 500. Furthermore, since the oil collection tank 300 is located above the separation zone 120, and the grease in the separation zone 120 overflows into the oil collection tank 300, the oil storage tank 500 must be submerged in the liquid of the separation zone 120. Because the temperature of the oil-water mixture discharged from the catering industry is generally higher than the ambient temperature, the contact between the liquid in the separation zone 120 and the oil storage tank 500 provides insulation, slowing down the solidification rate of the grease within the oil storage tank 500.

[0036] It is understandable that the oil storage tank 500 is connected to the oil drain pipe 510, and the oil drain pipe 510 is equipped with a valve.

[0037] Furthermore, the oil storage tank 500 is more airtight than the oil collection tank 300, and a valve is installed on the oil drain pipe 510 to control the discharge of grease and prevent it from being maliciously removed.

[0038] Understandably, the water collection tank 400 is connected to the drain pipe 410.

[0039] Wastewater collected in the collection tank 400 can be discharged through the drain pipe 410. Optionally, the drain pipe 410 can be connected to a downstream sewage treatment facility. It should be understood that even if the collection tank 400 is not connected to the drain pipe 410, a water pump can be used to actively remove the wastewater from the collection tank 400.

[0040] It is understandable that the liquid inlet area 110 is equipped with a filter assembly 600, which is located at the top of the liquid inlet area 110, so that the liquid flows through the filter assembly 600 before entering the liquid inlet area 110.

[0041] Oil-water mixtures often contain food residue. Although large pieces and large quantities of food residue can be filtered and separated in the early stages, a small amount of small residue still enters the vertical flow labyrinth oil-water separator along with the oil-water mixture, reducing the space of container 100. To further filter the residue, a filter assembly 600 is installed in the liquid inlet area 110.

[0042] It is understood that the filter assembly 600 includes a filter cake container 610, and the wall of the filter cake container 610 has multiple filter holes.

[0043] The filter assembly 600 can adopt a simple filter structure, such as a filter cake container 610 with multiple filter holes.

[0044] Understandably, it also includes an inlet pipe 700, the outlet end of which extends into the interior of the filter cake tank 610.

[0045] To reduce splashing of the oil-water mixture after it exits the inlet pipe 700, it is preferable that the outlet end of the inlet pipe 700 extends into the interior of the filter cake container 610. Since the filter cake container 610 filters the oil-water mixture, it reduces the flow velocity of the mixture. The filter cake container 610 will retain the oil-water mixture, which will submerge the outlet end of the inlet pipe 700, achieving a dynamic equilibrium. The fact that the oil-water mixture submerges the outlet end of the inlet pipe 700 further reduces splashing.

[0046] Furthermore, when the filter cake container 610 is clogged with accumulated filter cake, it may cause a rise in the hydraulic pressure of the inlet pipe 700, resulting in equipment damage. To reduce the risk of equipment damage, it is understandable that the filter cake container 610 has an opening at the top. When the filter cake container 610 is clogged, the oil-water mixture can still overflow from the opening at the top of the filter cake container 610, preventing a rise in the hydraulic pressure of the inlet pipe 700.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A vertical flow labyrinth oil-water separator, characterized in that, include: A container (100) having an internal cavity; Multiple partitions (200) are vertically arranged in the cavity. The multiple partitions (200) divide the cavity into a liquid inlet area (110), several separation areas (120) and a water outlet area (130) that are connected in sequence. The liquid can flow back and forth through the liquid inlet area (110), the separation area (120) and the water outlet area (130). The bottom of the separation area (120) is connected to the bottom of the water outlet area (130). An oil collection tank (300) is provided on the upper part of the separation zone (120), and the oil collection tank (300) and the separation zone (120) are in overflow communication. A water collection tank (400) is provided above the water outlet area (130), and the water collection tank (400) and the water outlet area (130) are in overflow communication. The overflow liquid level between the oil collection tank (300) and the separation zone (120) is higher than the overflow liquid level between the water collection tank (400) and the water outlet zone (130).

2. The vertical flow labyrinth oil-water separator according to claim 1, characterized in that, The container (100) is barrel-shaped, and the water outlet area (130) is located at the center of the container (100). The side closer to the center of the container (100) is defined as the inner side, and the side further away is defined as the outer side. The separation area (120) surrounds the outer side of the water outlet area (130). An overflow channel for oil flow is formed between the outer wall of the water collection tank (400) and the inner wall of the oil collection tank (300). From bottom to top, the inner wall of the oil collection tank (300) gradually approaches the water collection tank (400).

3. The vertical flow labyrinth oil-water separator according to claim 1, characterized in that, It also includes an oil storage tank (500), which is connected to the oil collection tank (300) and has an oil storage space.

4. The vertical flow labyrinth oil-water separator according to claim 3, characterized in that, The oil storage tank (500) is located below the oil collection tank (300), and the oil storage tank (500) is located in the separation zone (120).

5. The vertical flow labyrinth oil-water separator according to claim 3, characterized in that, The oil storage tank (500) is connected to an oil drain pipe (510), and the oil drain pipe (510) is equipped with a valve.

6. The vertical flow labyrinth oil-water separator according to claim 1, characterized in that, The water collection tank (400) is connected to a drain pipe (410).

7. The vertical flow labyrinth oil-water separator according to claim 1, characterized in that, The liquid inlet area (110) is provided with a filter assembly (600), which is located at the upper part of the liquid inlet area (110), so that the liquid flows through the filter assembly (600) before entering the liquid inlet area (110).

8. The vertical flow labyrinth oil-water separator according to claim 7, characterized in that, The filter assembly (600) includes a filter cake container (610), and the wall of the filter cake container (610) has a plurality of filter holes.

9. The vertical flow labyrinth oil-water separator according to claim 8, characterized in that, It also includes an inlet pipe (700), the outlet end of which extends into the interior of the filter cake container (610).

10. The vertical flow labyrinth oil-water separator according to claim 9, characterized in that, The upper opening of the filter cake bucket (610).

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