Oil-water separation device

Abstract

The invention belongs to the technical field of oil-water separation, and discloses an oil-water separation device, which comprises: a pool body, the pool body comprises a water inlet pipe for introducing an oil-water mixture, and an oil outlet pipe and a water outlet pipe for discharging separated oil and water, and the water outlet pipe is arranged on a wall surface opposite to a wall surface where the water inlet pipe is located; each oil-water separation plate is provided with a wave-shaped bent surface, the wave shape extends in a bent mode in the direction from the wall face where the water inlet pipe is located to the wall face where the water outlet pipe is located, and oil passing holes are formed in the protruding positions of the wave shapes. Through the wave-shaped oil-water separation plates, oil and water can be rapidly separated, and meanwhile grease transfer between all layers is achieved.

Description

Technical Field

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

[0002] In the metallurgical field, gear oil, hydraulic oil and lubricating oil are used in steel rolling and steelmaking processes. During the production process, some oil will enter the vortex well along with the turbid ring cooling water. As time goes by, the floating oil in the vortex well accumulates more and more, which leads to a large increase in the oil content in the turbid ring water, increasing the operating load and operating cost of the turbid ring water treatment system. In severe cases, the effluent quality of the turbid ring water treatment system cannot meet the production process requirements, resulting in a decline in the quality of the products produced, and even affecting production. With the application of more and more oil collection devices, the floating oil in the vortex well is collected, but the oil collection device does not separate oil and water. The collected floating oil has a high water content and has no reuse value. It can only be treated as hazardous waste, resulting in waste of resources and economic losses. If the water content of the recovered floating oil can be reduced, this oil will have recovery value.

[0003] Floating oil can also be collected by using a grease trap, which has a fixed water outlet weir and oil retaining weir. However, this treatment process occupies a large area, the floating oil accumulates in a large area on the top surface, and the long residence time makes it easy for it to form waste such as oil residue with other impurities.

[0004] At present, centrifugal oil-water separators can be used for oil-water separation. They rely on high-speed rotation and utilize the density difference between oil and water to separate oil and water. However, this method has high energy consumption. When centrifugal oil-water separators are used for sedimentation separation, the concentration of the feed must be within a certain range. Too high or too low concentrations will affect the separation effect. This means that in some cases, pretreatment or concentration adjustment is required before centrifugal separation can be performed. Since centrifugal oil-water separators require high-speed rotation to achieve separation, their systems are highly complex and fragile. Therefore, during the production process, complex system debugging and maintenance are required to ensure the stability and reliability of the system. The high-speed rotation of the centrifugal oil-water separator requires a high degree of balance and stability. Therefore, once foreign matter or particles appear, the equipment may become unbalanced, thereby affecting the separation effect or even damaging the equipment.

[0005] Therefore, there is an urgent need for a low-energy consumption device that can effectively separate oil and water. Summary of the invention

[0006] In order to solve the above problems, the present application provides an oil-water separation device, comprising:

[0007] The tank body includes a water inlet pipe for introducing the oil-water mixture, and an oil outlet pipe and a water outlet pipe for discharging the separated oil and water, wherein the water outlet pipe is arranged on a wall surface opposite to the wall surface where the water inlet pipe is located;

[0008] A plurality of stacked oil-water separation plates are provided, each of which has a wavy curved surface, and the wavy shape is curved and extended along the direction from the wall where the water inlet pipe is located to the wall where the water outlet pipe is located, and oil holes are provided at the wavy protrusions.

[0009] Optionally, an oil separator extending downward from the top of the pool body is provided on the side of the oil-water separation plate close to the water outlet pipe.

[0010] Optionally, an oil collecting plate is further provided above the oil-water separation plate, and the oil collecting plate extends obliquely upward from the oil separation plate toward the wall surface where the water inlet pipe is located, and then extends vertically upward.

[0011] Optionally, a water distribution plate is provided in the pool body, the water distribution plate is vertically arranged between the water inlet pipe and the oil-water separation plate, and has a plurality of water holes evenly distributed on the water distribution plate.

[0012] Optionally, both sides of the wave-shaped extension direction of the oil-water separation plate are horizontal sections.

[0013] Optionally, the lower end of the water distribution plate is connected to the bottom of the pool body, and the upper end extends upward to the horizontal section of the uppermost oil-water separation plate.

[0014] Optionally, a water retaining plate is connected between the horizontal section of the uppermost oil-water separation plate and the top of the water distribution plate.

[0015] Optionally, an oil outlet weir is extended upward from the upper end of the water distribution plate.

[0016] Optionally, the oil outlet pipe is on the same wall as the water inlet pipe and is higher than the water inlet pipe. A guide plate is connected between the water distribution plate and the wall where the water inlet pipe is located to guide the separated grease to flow to the oil outlet pipe.

[0017] Optionally, a water outlet weir is provided beside the water outlet pipe, and the water outlet weir comprises a support plate extending horizontally from the wall surface below the water outlet pipe, and a baffle extending upward from the end surface of the support plate.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] (1) The wavy oil-water separation plate can achieve rapid separation of oil and water, while also enabling the transfer of grease between layers.

[0020] (2) The inclined oil collecting plate can quickly gather the floating oil near the oil outlet weir to form an oil layer of a certain thickness, which can be quickly discharged, thus reducing the residence time and avoiding the deterioration of the oil and further pollution and deterioration.

[0021] (3) Complete oil-water separation reduces the water content of the recovered oil.

[0022] (4) The water distribution plate can quickly and evenly distribute incoming water, improving the stability of equipment operation.

[0023] (5) The oil-water separation device can quickly separate oil and water, greatly increase the processing capacity, and occupy a small area overall. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the oil-water separation device according to an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of a water distribution plate described in an embodiment of the present invention.

[0026] Reference numerals:

[0027] Pool body 10, water inlet pipe 101, water outlet pipe 102, oil outlet pipe 103, water distribution plate 104, water through hole 1041, oil separator 105, water outlet weir 106, support plate 1061, baffle 1062, oil outlet weir 107, guide plate 108, oil-water separation plate 20, oil through hole 201, water baffle 202, oil gathering plate 30, oil gathering area 40. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inside", "outside", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0030] The oil-water separation device of this embodiment includes a tank body 10, which is used to pass the oil-water mixture to be separated and output the separated oil and water respectively; an oil-water separation plate 20, which separates the oil-water mixture through a wave-shaped structure; and an oil collecting plate 30, which is used to collect the separated oil.

[0031] The tank body 10 is box-shaped and includes a water inlet pipe 101 at the bottom for introducing the oil-water mixture to be separated. The water inlet pipe 101 is as close to the bottom of the tank body 10 as possible to reduce the falling impact of the incoming oil-water mixture so that the incoming liquid can flow smoothly. A gate can be provided on the water inlet pipe 101 to control the opening and closing of the water inlet pipe 101.

[0032] An outlet pipe 102 is arranged on the wall opposite to the wall where the water inlet pipe 101 is located. The outlet pipe 102 is arranged at a higher position of the wall so that more water can flow out after accumulating. A gate can be arranged on the outlet pipe 102 to control the opening and closing of the outlet pipe 102.

[0033] A plurality of stacked oil-water separation plates 20 are arranged in the tank body 10. The oil-water separation plates 20 can achieve rapid separation of oil and water, and at the same time achieve the transfer of grease between layers. Each oil-water separation plate 20 has a wavy curved surface, and its wavy shape is curved and extended along the direction from the wall where the water inlet pipe is located to the wall where the water outlet pipe is located. The protrusions of each oil-water separation plate 20 are arranged correspondingly, and the recessed parts are also arranged correspondingly.

[0034] The wave-shaped protrusion is provided with an oil hole 201 for achieving oil-water separation. Since the density of oil is smaller than that of water, it floats in water, and when the oil-water mixture flows through the protrusion, the grease will naturally float to the protrusion, so the grease in the oil-water mixture will gather at the wave-shaped protrusion, the water will flow to the right, and the grease will naturally float through the oil hole and pass through the oil-water separation plate 20, thereby achieving the purpose of separating oil and water.

[0035] In some embodiments, both sides of the wavy extension direction of the oil-water separation plate 20 are horizontal sections. The left side can facilitate the oil-water mixture to enter the gap of the oil-water separation plate 20, and the right side can facilitate the water separated by oil and water to flow toward the outlet pipe.

[0036] A water distribution plate 104 is provided in the tank body 10. The water distribution plate 104 is vertically arranged between the water inlet pipe and the oil-water separation plate. The lower end of the water distribution plate 104 is fixedly connected to the bottom plate of the tank body 10, and the upper end extends upward to the uppermost oil-water separation plate. The water distribution plate 104 has a plurality of evenly distributed water holes 1041. The oil-water mixture passes through the evenly distributed water holes, thereby achieving the purpose of evenly distributing and flowing to the oil-water separation plate.

[0037] A water baffle 202 is also connected between the topmost oil-water separation plate 20 and the top of the water distribution plate 104, one end of the water baffle 202 is fixedly connected to the water distribution plate 104, and the other end is fixedly connected to the horizontal section of the oil-water separation plate 20. The water baffle 202 can prevent the oil-water mixture entering from the water inlet pipe 101 from exceeding the oil-water separation plate during the rising process, thereby preventing the liquid that has not been separated from the oil and water from entering the oil gathering area 40.

[0038] After passing through the water distribution plate 104, the oil-water mixture enters between the oil-water separation plates 20 and flows toward the water outlet pipe. During the flow, the grease floats up through the oil holes 201 at the protrusions and is separated from the water flow. For example, for the oil-water mixture flowing through the bottom oil-water separation plate 20, the oil-water mixture first passes through the first oil-water separation plate 20, and the grease gathers at the wave-shaped protrusions and floats up between the two oil-water separation plates through the oil holes at the protrusions, and mixes with the oil-water mixture flowing in from the left side. The grease that floats between the two oil-water separation plates will still float on the water, so the grease will enter between the second and third oil-water separation plates 20, and the water will flow to the right. By analogy, after the oil-water mixture passes through multiple oil-water separation plates, the separated grease passes through and gathers from the top oil-water separation plate 20, and the water can flow out from the right side of the oil-water separation plate 20.

[0039] An oil separator 105 is provided on the side of the oil-water separation plate close to the water outlet pipe. The oil separator 105 is a baffle that can prevent grease from flowing away with the outlet water. The floating oil after oil-water separation is blocked by the oil separator 105 and will not flow toward the water outlet pipe 102.

[0040] An oil collecting plate 30 is also provided above the oil-water separation plate 20, one end of the oil collecting plate 30 extends to the oil separation plate 105, and may be fixedly connected to the oil separation plate 105. The other end extends upwardly at an angle to all protrusions beyond the oil-water separation plate 20. Moreover, the other end also extends vertically upward. An oil weir 107 also extends upward from the upper end of the water distribution plate 104, and an area for floating oil to gather is formed between the oil weir 107 and the oil collecting plate 30. By the inclined setting of the oil collecting plate 30, the floating oil can be quickly gathered near the oil weir to form an oil layer of a certain thickness, and quickly discharged, thereby reducing the residence time and avoiding the deterioration and further contamination of the oil. The oil weir 107 allows the floating oil to gather to a certain extent before flowing out, thereby controlling the oil level.

[0041] In some embodiments, the angle between the oil collecting plate 30 and the horizontal plane is optimally in the range of 3 to 15 degrees.

[0042] A guide plate 108 is also connected between the water distribution plate 104 and the wall where the water inlet pipe 101 is located. The guide plate 108 can be arranged horizontally. Grease exceeding the oil outlet weir 107 will flow onto the guide plate 108 and flow into the oil outlet pipe 103 from the guide plate 108.

[0043] In some embodiments, a water outlet weir 106 is provided beside the water outlet pipe 102. The water outlet weir 106 includes a support plate 1061 extending horizontally from the wall surface where the water outlet pipe 102 is located, and a baffle 1062 extending upward from the end surface of the support plate 1061. Through the obstruction of the water outlet weir 106, the outlet water can rise to a certain level before flowing out, thereby controlling the water level of the outlet water.

[0044] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations shall fall within the protection scope of the claims of the present invention.

Claims

1. An oil-water separation device, characterized in that: include: The tank body comprises a water inlet pipe for introducing the oil-water mixture, and an oil outlet pipe and a water outlet pipe for discharging the separated oil and water, wherein the water outlet pipe is arranged on a wall surface opposite to the wall surface where the water inlet pipe is located; A plurality of stacked oil-water separation plates are provided, each of which has a wavy curved surface, and the wavy shape is curved and extended along the direction from the wall where the water inlet pipe is located to the wall where the water outlet pipe is located, and oil holes are provided at the wavy protrusions.

2. The oil-water separation device according to claim 1, characterized in that: An oil separator extending downward from the top of the pool body is arranged on one side of the oil-water separation plate close to the water outlet pipe.

3. The oil-water separation device according to claim 2, characterized in that: An oil collecting plate is also arranged above the oil-water separation plate. The oil collecting plate extends obliquely upward from the oil separation plate toward the wall surface where the water inlet pipe is located, and then extends vertically upward.

4. The oil-water separation device according to claim 1, characterized in that: A water distribution plate is arranged in the pool body, and the water distribution plate is vertically arranged between the water inlet pipe and the oil-water separation plate. The water distribution plate is provided with a plurality of water holes evenly distributed.

5. The oil-water separation device according to claim 4, characterized in that: Both sides of the wave-shaped extension direction of the oil-water separation plate are horizontal sections.

6. The oil-water separation device according to claim 5, characterized in that: The lower end of the water distribution plate is connected to the bottom of the pool body, and the upper end thereof extends upward to the horizontal section of the uppermost oil-water separation plate.

7. The oil-water separation device according to claim 6, characterized in that: A water retaining plate is also connected between the horizontal section of the uppermost oil-water separation plate and the top of the water distribution plate.

8. The oil-water separation device according to claim 4, characterized in that: An oil outlet weir is also extended upward from the upper end of the water distribution plate.

9. The oil-water separation device according to claim 8, characterized in that: The oil outlet pipe is on the same wall surface as the water inlet pipe and is higher than the water inlet pipe. A guide plate is connected between the water distribution plate and the wall surface where the water inlet pipe is located to guide the separated grease to flow to the oil outlet pipe.

10. The oil-water separation device according to claim 1, characterized in that: A water outlet weir is also arranged beside the water outlet pipe, and the water outlet weir comprises a support plate horizontally extending from the wall surface below the water outlet pipe, and a baffle plate extending upward from the end surface of the support plate.

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