Oil-water separation device

Abstract

The invention provides an oil-water separation device, which comprises a settling zone and a separation zone, the separation zone comprises a sludge storage hopper, an oil storage zone, an ascending zone, a descending zone and a water storage zone, the ascending zone and the descending zone are provided with a filler with a certain angle, and the ascending zone is provided with the filler with a certain angle by using a shallow pool theory. An oil-water mixture flows from bottom to top through a flow channel between filler gaps, oil-water separation is achieved, the flow channel design of the descending area is basically the same as that of the ascending area, the directions of the descending area and the ascending area are opposite, oil which is not separated out of the mixture can be separated again through the arrangement of the descending area, space is saved to the maximum degree, and meanwhile the oil-water separation efficiency is improved. Oil and water can be separated under the condition of low operation cost, recycling can be achieved, and the device has the advantages of being wide in applicable water quality, low in operation cost, small in occupied area, capable of saving energy, resistant to corrosion, stable in long-term operation and the like.

Description

Technical Field

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

[0002] Oil-water separation technology originated from the natural sedimentation method in the early 20th century, which uses physical principles to separate oil and water. Later, artificial separation technology was developed, which can more effectively separate the oil from the oil-water mixture through a series of special equipment. However, the natural sedimentation process requires a large space, the artificial separation technology equipment is expensive, the process route is complicated, and the introduction of new reagents is not conducive to the treatment of sewage.

[0003] The existing patent application (CN215711938U) discloses an oily wastewater treatment device, including a tank body, a liquid inlet pipe connected to the side of the tank body, a liquid discharge pipe connected to the side wall of the tank body opposite to the liquid inlet pipe, a coalescing plate packing layer installed on the inner side of the tank body adjacent to the liquid inlet pipe, a guide channel formed between the lower part of the coalescing plate packing layer and the lower wall of the tank body, an inclined tube packing layer installed inside the tank body, a plurality of sand flushing devices installed on the inner side of the lower wall of the tank body, a plurality of oil collecting tanks installed on the inner side of the upper wall of the tank body, the plurality of oil collecting tanks are interconnected, an oil bag is connected to the upper wall of the tank body, and the oil bag is connected to the upper part of an oil collecting tank. By coordinating the coalescing plate packing layer and the inclined tube packing layer, the shallow pool theory is used to increase the contact area of ​​fine oil droplets, create a good laminar flow state, prevent fine oil droplets from being carried out in a turbulent state, provide conditions for small water droplets to accumulate into large water droplets, and thus achieve better oil-water separation, and meet the treatment needs of various sewage. Summary of the invention

[0004] In order to solve the problem of separating oil from water at low operating costs, the present invention provides an oil-water separation device, comprising a sedimentation zone and a separation zone, wherein the sedimentation zone and the separation zone are connected via a connecting pipe;

[0005] A water inlet is provided above the sedimentation area, and a slag discharge port is provided below the sedimentation area;

[0006] The separation area includes a mud storage hopper, an oil storage area, an ascending area, a descending area and a water storage area. The mud storage hopper, the oil storage area, the ascending area, the descending area and the water storage area are separated by baffles. The mud storage hopper is located below the oil storage area and is used to store suspended matter that has not been filtered out of the oil-water mixture. A mud discharge pipe is provided inside the mud storage hopper. A first filler for oil-water separation is provided inside the ascending area, and a second filler for oil-water separation is provided inside the descending area. The ascending area and the descending area are the main oil-water separation process sections, and the oil-water mixture is efficiently separated in this area. Using the shallow pool theory, fillers at a certain angle are arranged in the ascending area, and the oil-water mixture flows from bottom to top through the flow channel between the gaps of the fillers to achieve oil-water separation. The flow channel design of the descending area is basically the same as that of the ascending area, but in the opposite direction. Through the setting of the descending area, the unseparated oil in the mixture can be separated again, saving space to the greatest extent, while improving the oil-water separation efficiency.

[0007] The separation area is mainly divided into the ascending area, descending area, oil storage area and water storage area. At the same time, multiple sections can be spliced ​​and combined according to the processing volume, presenting multiple flow channels and areas to achieve a larger processing volume and better separation effect.

[0008] The flow channels in the ascending and descending areas are specially designed to shorten the separation distance, increase the separation area, and improve the separation efficiency.

[0009] Since the density of oil is relatively small, the oil storage area is arranged at the upper position to reasonably utilize the remaining space for arranging the flow channel; the water storage area is the same as the oil storage area. A mud storage hopper is arranged at the bottom of the separation area to regularly discharge the sediment brought in by the oil-water mixture.

[0010] The oil-water separation device described in the present invention is preferably provided with an oil discharge port below the oil storage area and a first liquid level gauge in the middle.

[0011] The oil-water separation device described in the present invention is preferably provided with a drain outlet below the water storage area and a second liquid level gauge in the middle.

[0012] In the oil-water separation device described in the present invention, as a preferred embodiment, the longitudinal section of the mud storage hopper is trapezoidal.

[0013] In the oil-water separation device described in the present invention, as a preferred embodiment, the gaps inside the first filler form a first flow channel from top to bottom, and the angle between the first flow channel and the horizontal plane is 5 to 85 degrees.

[0014] In the oil-water separation device described in the present invention, as a preferred embodiment, the gaps inside the second filler form a second flow channel from top to bottom, and the angle between the second flow channel and the horizontal plane is 5 to 85 degrees.

[0015] In the oil-water separation device described in the present invention, as a preferred embodiment, the first filler and the second filler are used to reduce the emulsion interface film strength of the oil-water mixture flowing through the first filler or the second filler.

[0016] The oil-water separation device described in the present invention has the following working process:

[0017] The oil-water mixture first enters the sedimentation area, where the suspended matter in the mixture is settled, purifying the water while protecting the equipment in the back-end process section.

[0018] The oil-water mixture after the suspended matter is settled enters the separation zone. In the ascending zone, the oil-water mixture flows from bottom to top through the flow channel between the filler gaps. The shallow pool theory is used to increase the contact area of ​​fine oil droplets and create a good laminar flow state, so that the fine oil droplets can avoid turbulent flow. This provides conditions for the accumulation of fine water droplets into large water droplets, forming oil-water stratification. The upper oil enters the oil storage area, and the water with trace oil droplets enters the descending zone for secondary separation, thereby achieving oil-water separation.

[0019] A mud storage hopper is arranged at the bottom of the separation zone to regularly discharge the sediment brought in by the oil-water mixture.

[0020] The present invention provides an oil-water separation device, which can separate oil from water at low operating cost and can be reused. The device has the advantages of wide application of water quality, low operating cost, small footprint, energy saving, corrosion resistance, long-term stable operation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic structural diagram of an oil-water separation device of the present invention.

[0022] Reference numerals:

[0023] 1. Sedimentation area; 11. Water inlet; 12. Slag outlet; 2. Separation area; 21. Mud storage hopper; 211. Mud discharge pipe; 22. Oil storage area; 221. Oil discharge outlet; 222. First liquid level gauge; 23. Rising area; 231. First filler; 232. First channel; 24. Descending area; 241. Second filler; 242. Second channel; 25. Water storage area; 251. Drain outlet; 252. Second liquid level gauge; 3. Connecting pipe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example 1

[0026] like Figure 1As shown, an oil-water separation device comprises a sedimentation zone 1 and a separation zone 2, wherein the sedimentation zone 1 and the separation zone 2 are connected via a connecting pipe 3;

[0027] A water inlet 11 is provided above the sedimentation area 1, and a slag discharge port 12 is provided below the sedimentation area 1;

[0028] The separation area 2 includes a mud hopper 21, an oil storage area 22, an ascending area 23, a descending area 24 and a water storage area 25, and the mud hopper 21, the oil storage area 22, the ascending area 23, the descending area 24 and the water storage area 25 are separated by baffles; the mud hopper 21 is located below the oil storage area 22, and the mud hopper 21 is provided with a mud discharge pipe, the ascending area 23 is provided with a first filler 231 for oil-water separation, and the descending area 24 is provided with a second filler 241 for oil-water separation. The first filler 231 and the second filler 241 are made of PP, PVC or FRP, and are used to reduce the emulsion interface film strength of the oil-water mixture flowing through the first filler 231 or the second filler 241.

[0029] An oil discharge port 221 is provided below the oil storage area 22, and a first liquid level gauge 222 is provided in the middle.

[0030] A drain outlet 251 is provided below the water storage area 25, and a second liquid level gauge 252 is provided in the middle.

[0031] The longitudinal section of the mud storage bucket 21 is trapezoidal.

[0032] A second flow channel 232 extending from top to bottom is formed between gaps inside the first filler 231 , and an angle between the second flow channel 232 and a horizontal plane is 5 to 85 degrees.

[0033] A second flow channel 242 extending from top to bottom is formed between gaps inside the second filler 241 , and an angle between the second flow channel 242 and a horizontal plane is 5 to 85 degrees.

[0034] When in use, the oil-water mixture first enters the sedimentation area 1, and the suspended matter in the mixture is settled in this area, which purifies the water quality and protects the equipment in the back-end process section.

[0035] The oil-water mixture after the suspended matter is settled enters the separation zone 2 and moves back and forth in the flow channel. Due to the difference in density between oil and water, separation is achieved during the movement.

[0036] The separation area 2 is mainly divided into a mud storage hopper 21, an oil storage area 22, an ascending area 23, a descending area 24 and a water storage area 25. At the same time, multiple sections can be spliced ​​and combined according to the processing volume, presenting multiple flow channels and areas to achieve a larger processing volume and better separation effect.

[0037] The flow channels in the ascending area 23 and the descending area 24 are specially designed to shorten the separation distance, increase the separation area, and improve the separation efficiency.

[0038] Since the density of oil is relatively small, the oil storage area 22 is arranged at the upper position to reasonably utilize the remaining space for arranging the flow channel, and at the same time, it can ensure that the oil content in the oil storage area 22 is high; the water storage area 25 has the same principle as the oil storage area 22. A mud storage hopper 21 is arranged at the bottom of the separation area 2 to regularly discharge the sediment brought in by the oil-water mixture.

[0039] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that any modification, change or equivalent that can be made without departing from the spirit and scope defined by the claims will fall within the protection scope of the present invention.

Claims

1. An oil-water separation device, characterized in that: It comprises a precipitation zone (1) and a separation zone (2), wherein the precipitation zone (1) and the separation zone (2) are connected via a connecting pipe (3); A water inlet (11) is provided above the sedimentation area (1), and a slag discharge port (12) is provided below the sedimentation area (1); The separation area (2) comprises a mud storage hopper (21), an oil storage area (22), an ascending area (23), a descending area (24) and a water storage area (25); the mud storage hopper (21), the oil storage area (22), the ascending area (23), the descending area (24) and the water storage area (25) are separated by a baffle; the mud storage hopper (21) is located below the oil storage area (22); a mud discharge pipe (211) is provided inside the mud storage hopper (21); a first filler (231) for oil-water separation is provided inside the ascending area (23); and a second filler (241) for oil-water separation is provided inside the descending area (24).

2. The oil-water separation device according to claim 1, characterized in that: An oil discharge port (221) is provided below the oil storage area (22), and a first liquid level gauge (222) is provided in the middle of the oil storage area (22).

3. The oil-water separation device according to claim 1, characterized in that: A drainage outlet (251) is provided below the water storage area (25), and a second liquid level gauge (252) is provided in the middle of the water storage area (25).

4. The oil-water separation device according to claim 1, characterized in that: The longitudinal section of the mud storage bucket (21) is trapezoidal.

5. The oil-water separation device according to claim 1, characterized in that: A first flow channel (232) extending from bottom to top is formed between gaps inside the first filler (231), and the angle between the first flow channel (232) and a horizontal plane is 5 to 85 degrees.

6. The oil-water separation device according to claim 1, characterized in that: A second flow channel (242) extending from top to bottom is formed between gaps inside the second filler (241), and the angle between the second flow channel (242) and a horizontal plane is 5 to 85 degrees.

7. The oil-water separation device according to claim 1, characterized in that: The first filler (241) and the second filler (242) are used to reduce the emulsion interface film strength of the oil-water mixture flowing through the first filler (241) or the second filler (242).

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