An oil-water separation device

Abstract

The application belongs to the technical field of oil-water separation, and discloses an oil-water separation device, which comprises a pool body, a water inlet pipe for feeding an oil-water mixture, an oil outlet pipe and a water outlet pipe for discharging 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; and a plurality of oil-water separation plates arranged in layers, each of which has a wave-shaped curved surface, and the wave shape extends in a direction from the wall surface where the water inlet pipe is located to the wall surface where the water outlet pipe is located, and an oil passing hole is arranged at the convex part of the wave shape. The oil-water separation device can realize rapid separation of oil and water and transmission of grease between layers through the wave-shaped oil-water separation plates.

Description

Technical Field

[0001] This invention belongs to the field of oil-water separation technology, and more specifically, relates to an oil-water separation device. Background Technology

[0002] In the metallurgical field, gear oil, hydraulic oil, and lubricating oil are used in steel rolling and steelmaking processes. During production, some of these oils enter the vortex well along with the circulating cooling water. Over time, the floating oil in the vortex well accumulates, leading to a significant increase in the oil content of the circulating water. This increases the operating load and cost of the circulating water treatment system, and in severe cases, the effluent quality may fail to meet production process requirements, resulting in a decline in product quality and even production disruptions. With the increasing use of oil recovery devices, the floating oil in the vortex well is collected. However, these devices do not perform oil-water separation, resulting in high water content and no reuse value. The oil must be treated as hazardous waste, causing resource waste and economic losses. If the water content of the recovered floating oil could be reduced, it would have recycling value.

[0003] Oil separators can also be used to collect floating oil, with fixed effluent weirs and oil-blocking weirs. However, this treatment process requires a large area, the floating oil accumulates on the top surface over a large area, and the long residence time makes it easy to form waste such as oil sludge with other impurities.

[0004] Currently, centrifugal oil-water separators can be used for oil-water separation, relying on high-speed rotation and the density difference between oil and water to separate them. However, this method is energy-intensive. During sedimentation separation, the concentration of the feed material in a centrifugal oil-water separator must be within a certain range; too high or too low a concentration will affect the separation effect. This means that in some cases, pretreatment or concentration adjustment is necessary before centrifugal separation. Because centrifugal oil-water separators require high-speed rotation to achieve separation, their systems are highly complex and vulnerable. Therefore, complex system debugging and maintenance are required during production to ensure system stability and reliability. The high-speed rotation of a centrifugal oil-water separator requires a high degree of balance and stability; therefore, the presence of foreign objects or particles can cause equipment imbalance, 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] To address the above problems, this application provides an oil-water separation device, comprising:

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

[0008] Multiple oil-water separation plates are stacked in layers. Each oil-water separation plate has a wavy curved surface. The wavy shape extends along the direction from the wall where the water inlet pipe is located to the wall where the water outlet pipe is located. Oil passage holes are provided at the protrusions of the wavy shape.

[0009] Optionally, an oil separator extending downward from the top of the tank is provided on the side of the oil-water separator plate facing the outlet pipe.

[0010] Optionally, an oil-collecting plate is also provided above the oil-water separator plate. The oil-collecting plate extends upwards at an angle from the oil separator plate toward the wall where the water inlet pipe is located, and then extends vertically upwards.

[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 the water distribution plate has a plurality of water passage holes evenly distributed.

[0012] Optionally, both sides of the wavy extension direction of the oil-water separator plate are horizontal sections.

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

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

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

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

[0017] Optionally, a water outlet weir is also provided next to the water outlet pipe. The water outlet weir includes a support plate extending horizontally from the wall below the water outlet pipe and a baffle extending upward from the end of the support plate.

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

[0019] (1) Through the corrugated oil-water separation plate, oil and water can be separated quickly, and grease can be transferred between layers.

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

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

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

[0023] (5) This oil-water separation device can quickly separate oil and water, greatly increase the processing capacity, and has a small overall footprint. Attached Figure Description

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

[0025] Figure 2 This is a schematic diagram of the water distribution plate according to an embodiment of the present invention.

[0026] Figure label:

[0027] Pool body 10, inlet pipe 101, outlet pipe 102, oil outlet pipe 103, water distribution plate 104, water passage hole 1041, oil separator plate 105, water outlet weir 106, support plate 1061, baffle 1062, oil outlet weir 107, guide plate 108, oil-water separation plate 20, oil passage hole 201, water baffle 202, oil collection plate 30, oil collection zone 40. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. 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. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this application, such as "up," "down," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to 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 the embodiments of this application.

[0030] The oil-water separation device of this embodiment includes a tank 10 for introducing the oil-water mixture to be separated and outputting the separated oil and water separately; an oil-water separation plate 20 for separating the oil-water mixture through a corrugated structure; and an oil-gathering plate 30 for gathering the separated grease.

[0031] The tank body 10 is box-shaped and includes a water inlet pipe 101 located at the bottom for introducing the oil-water mixture to be separated. The water inlet pipe 101 is positioned as close as possible to the bottom of the tank body 10 to reduce the impact of the falling oil-water mixture, allowing the liquid to flow smoothly. A gate may be installed on the water inlet pipe 101 to control its opening and closing.

[0032] A water outlet pipe 102 is installed on the wall opposite to the wall where the water inlet pipe 101 is located. The water outlet pipe 102 is located at a higher position on the wall so that it can flow out after a large amount of water has accumulated. A gate can be installed on the water outlet pipe 102 to control the opening and closing of the water outlet pipe 102.

[0033] Multiple layered oil-water separation plates 20 are arranged within the pool body 10. These plates enable rapid separation of oil and water, while simultaneously facilitating the transfer of grease between layers. Each oil-water separation plate 20 has a wavy, curved surface, with the wavy shape extending along the direction from the wall containing the inlet pipe to the wall containing the outlet pipe. The protrusions and recesses of each oil-water separation plate 20 are correspondingly arranged.

[0034] An oil passage hole 201 is provided at the wavy protrusion to achieve oil-water separation. Since oil is less dense than water, it floats in water. When the oil-water mixture flows through the protrusion, the grease will naturally float towards the protrusion. Therefore, the grease in the oil-water mixture will accumulate at the wavy protrusion, the water will flow to the right, and the grease will naturally float up through the oil passage 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 separator 20 are horizontal sections. The left side facilitates the oil-water mixture to enter the gap of the oil-water separator 20, while the right side facilitates the flow of water that has undergone oil-water separation towards the outlet pipe.

[0036] A water distribution plate 104 is installed inside the pool body 10. The water distribution plate 104 is vertically positioned 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 pool 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 passage holes 1041. The oil-water mixture flows evenly towards the oil-water separation plate by passing through the evenly distributed water passage holes.

[0037] Furthermore, a baffle plate 202 is connected between the top of the uppermost oil-water separator plate 20 and the top of the water distribution plate 104. One end of the baffle plate 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 separator plate 20. This baffle plate 202 can prevent the oil-water mixture entering from the water inlet pipe 101 from exceeding the oil-water separator plate during its continuous rise, thus preventing unseparated liquid from entering the oil accumulation zone 40.

[0038] After passing through the water distribution plate 104, the oil-water mixture enters the space between the oil-water separation plates 20 and flows towards the outlet pipe. During this flow, the grease rises and passes through the oil passage holes 201 on the protrusions, separating from the water flow. For example, if the oil-water mixture flows through the bottommost oil-water separation plate 20, it first passes through the first oil-water separation plate 20. The grease gathers at the wavy protrusions and rises through the oil passage holes to the space between the two oil-water separation plates, mixing with the oil-water mixture flowing in from the left. The grease that rises to the space between the two oil-water separation plates remains on the water, so it enters the space between the second and third oil-water separation plates 20, while the water flows to the right. This process continues, and after passing through multiple oil-water separation plates, the separated grease passes through and gathers at the topmost oil-water separation plate 20, while the water flows 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 separator plate facing the water outlet pipe. It is a baffle that can prevent grease from flowing away with the water outlet. The floating oil after oil-water separation is blocked by the oil separator 105 and will not flow towards the water outlet pipe 102.

[0040] Above the oil-water separator plate 20, an oil-gathering plate 30 is also provided. One end of the oil-gathering plate 30 extends to the oil-separating plate 105 and may be fixedly connected to the oil-separating plate 105. The other end extends upward at an angle beyond all the protrusions of the oil-water separator plate 20. Furthermore, the other end also extends vertically upward. An oil weir 107 extends upward from the upper end of the water distribution plate 104, forming an area for floating oil to accumulate between the oil weir 107 and the oil-gathering plate 30. By tilting the oil-gathering plate 30, floating oil can be quickly gathered near the oil weir to form an oil layer of a certain thickness, which is then quickly discharged, reducing the residence time and preventing oil deterioration and further contamination. The oil weir 107 allows the floating oil to accumulate to a certain extent before flowing out, thereby controlling the oil level.

[0041] In some embodiments, the angle between the oil-coated plate 30 and the horizontal plane is preferably in the range of 3 to 15°.

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

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

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

Claims

1. An oil-water separation device, characterized in that, include: The pool body includes an inlet pipe for introducing an oil-water mixture, and an oil outlet pipe and a water outlet pipe for discharging separated oil and water, wherein the water outlet pipe is disposed on a wall surface opposite to the wall surface where the inlet pipe is located. Multiple oil-water separator plates are stacked in layers. Each oil-water separator plate has a wavy, curved surface. The wavy shape extends along the direction from the wall where the water inlet pipe is located to the wall where the water outlet pipe is located. Oil passage holes are provided at the protrusions of the wavy shape. On the side of the oil-water separator plate facing the outlet pipe, an oil-water separating plate is provided that extends downward from the top of the tank. An oil-collecting plate is also provided above the oil-water separator plate. The oil-collecting plate extends upwards at an angle from the oil separator plate toward the wall where the water inlet pipe is located, and then extends vertically upwards. The end of the oil-collecting plate that is close to the water outlet pipe is fixedly connected to the oil separator plate. ， A water distribution plate is installed inside the pool, vertically positioned between the water inlet pipe and the oil-water separator plate. An oil outlet weir extends upward from the upper end of the water distribution plate. The wavy extension direction of the oil-water separator plate has horizontal sections on both sides. A baffle plate is also connected between the horizontal section of the uppermost oil-water separator plate and the top of the water distribution plate.

2. The oil-water separation device according to claim 1, characterized in that, The water distribution plate has a plurality of water passage holes evenly distributed.

3. The oil-water separation device according to claim 1, characterized in that, The lower end of the water distribution plate is connected to the bottom of the pool, and the upper end extends upwards to the horizontal section of the uppermost oil-water separation plate.

4. The oil-water separation device according to claim 1, characterized in that, The oil outlet pipe and the water inlet pipe are on the same wall surface, and the oil outlet pipe is higher than the water inlet pipe. A guide plate is also connected between the water distribution plate and the wall surface where the water inlet pipe is located to guide the separated oil to flow to the oil outlet pipe.

5. The oil-water separation device according to claim 1, characterized in that, A water outlet weir is also provided next to the water outlet pipe. The water outlet weir includes a support plate extending horizontally from the wall below the water outlet pipe and a baffle extending upward from the end of the support plate.

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