Oily sewage treatment device

Abstract

The oily sewage treatment device comprises a treatment tank, a first partition plate and a second partition plate, a water inlet is formed in one side of the treatment tank and connected with a sewage pool through a water inlet pipe, an overflow tank is arranged on the other side of the treatment tank, the upper portion of the overflow tank is communicated with the upper portion of the treatment tank, and the lower portion of the overflow tank is connected with a standing tank through a first water outlet pipe; the first partition plate is vertically mounted on one side of the treatment tank, the upper part of the first partition plate is flush with the upper end of the treatment tank, and the distance between the lower part of the first partition plate and the bottom of the treatment tank is 30cm to 50cm; the second partition plate is vertically mounted in the treatment tank; the bottom of the second partition plate is connected with the bottom of the treatment tank. According to the utility model, the first aeration head is arranged at the bottom between the first partition plate and the second partition plate, and bubbles rise to drive sewage to flow upwards during aeration, so that the flowing speed of the sewage is increased, the rising small bubbles can accelerate the floating speed of oil beads in the sewage, and the sewage treatment efficiency of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical production wastewater treatment, in particular to an oily wastewater treatment device. Background Art

[0002] Trimethylpentane, commonly known as isooctane, is an isomer of octane. Isooctane can be obtained from petroleum refining or by synthetic methods. In the production process of isooctane, some oily wastewater will be produced. If these waters are discharged directly without treatment, they will cause great pollution to the water body. For this reason, people have studied some oily wastewater treatment devices. For example, the Chinese patent application number 201821923437.2 discloses an industrial wastewater recovery and separation device for isooctane production, including a separation tank, an inlet pipe and an outlet pipe. The inlet pipe is installed on the wall of one side of the separation tank and has a sleeve. The outlet pipe is inserted into the sleeve. On the other side wall of the separation tank, a surface oil separation structure is installed in the separation tank. A filtering separation structure is installed in the separation tank and on one side of the surface oil separation structure. The application uses a partition to block the upper oil in the sewage to achieve separation between the oil layer and water. In actual production, since the first partition blocks the upper layer of the sewage, the sewage can only flow from the lower part of the first partition. The power of the sewage flow mainly comes from the height difference between the sewage on both sides of the first partition, and the liquid level height difference in the separation tank is usually small, the spontaneous flow speed of the sewage is slow, which affects the treatment efficiency of the oily sewage. Therefore, an oily sewage treatment device is needed, which has an aeration head on one side of the partition, and uses small bubbles to float up to drive the flow of sewage, thereby increasing the flow speed of the sewage, and accelerating the floating speed of oil droplets through aeration, thereby improving the sewage treatment efficiency of the equipment. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an oily wastewater treatment device, which provides an aeration head on one side of the partition, utilizes small bubbles to float up to drive the flow of sewage, thereby increasing the flow rate of sewage, and accelerates the floating speed of oil droplets through aeration, thereby improving the efficiency of the equipment in treating sewage.

[0004] The utility model proposes an oily wastewater treatment device, comprising: a treatment tank, a first baffle, and a second baffle. A water inlet is provided on one side of the treatment tank, and the water inlet is connected to the sewage tank through an inlet pipe. An overflow tank is provided on the other side of the treatment tank, the upper part of the overflow tank is communicated with the upper part of the treatment tank, and the lower part of the overflow tank is connected to the static tank through a first outlet pipe; the first baffle is vertically installed on one side of the treatment tank, the upper part of the first baffle is flush with the upper end of the treatment tank, and the distance between the lower part of the first baffle and the bottom of the treatment tank is 30 cm to 50 cm; the second baffle is vertically installed in the treatment tank, the bottom of the second baffle is connected to the bottom of the treatment tank, and the upper part of the second baffle is 10 cm to 20 cm lower than the liquid level in the treatment tank; a first aeration head is provided at the bottom of the treatment tank, and the first aeration head is installed between the first baffle and the second baffle.

[0005] Furthermore, a grid plate is provided between the treatment tank and the upper portion of the first partition plate, and the grid plate is 15 cm to 30 cm higher than the water inlet.

[0006] Furthermore, a second water outlet pipe is provided above the grid plate, and the second water outlet pipe and the grid plate are 10 cm to 20 cm high. The treatment tank is provided with a third water outlet pipe on the side away from the water inlet, and the third water outlet pipe is connected to the bottom of the treatment tank.

[0007] Furthermore, the water inlet is trumpet-shaped.

[0008] Furthermore, a second aeration head is installed at the bottom of the treatment tank, and the first aeration head and the second aeration head are connected to the air source through an air pipe.

[0009] Furthermore, the lower end of the first partition is bent in a direction away from the first aeration head.

[0010] The beneficial effects of the utility model are as follows: by arranging the first aeration head at the bottom between the first partition plate and the second partition plate, the bubbles rise during aeration and drive the sewage to flow upward, thereby increasing the flow rate of the sewage. The rising small bubbles can accelerate the floating speed of the oil droplets in the sewage, thereby improving the sewage treatment efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] In the figure: 1-treatment tank, 2-first partition, 3-second partition, 4-water inlet, 5-water inlet pipe, 6-overflow tank, 7-first water outlet pipe, 8-first aeration head, 9-grid plate, 10-second aeration head, 11-second water outlet pipe, 12-third water outlet pipe, 13-trachea. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0014] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0015] Furthermore, terms such as "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of the aforementioned features. Furthermore, the technical solutions of various embodiments may be combined, but only if they are achievable by persons of ordinary skill in the art. If a combination of technical solutions contradicts or is unachievable, such combination shall be deemed non-existent and outside the scope of protection claimed by this utility model.

[0016] like Figure 1 As shown, an embodiment of the present invention provides an oily wastewater treatment device, comprising: a treatment tank 1, a first baffle 2, and a second baffle 3. A water inlet 4 is provided on one side of the treatment tank 1, and the water inlet 4 is connected to the sewage pool through an inlet pipe 5. An overflow tank 6 is provided on the other side of the treatment tank 1. The upper part of the overflow tank 6 is connected to the upper part of the treatment tank 1, and the lower part of the overflow tank 6 is connected to the static tank through a first outlet pipe 7; the first baffle 2 is vertically installed on one side of the treatment tank 1, the upper part of the first baffle 2 is flush with the upper end of the treatment tank 1, and the distance between the lower part of the first baffle 2 and the bottom of the treatment tank 1 is 30 cm to 50 cm; the second baffle 3 is vertically installed in the treatment tank 1, the bottom of the second baffle 3 is connected to the bottom of the treatment tank 1, and the upper part of the second baffle 3 is 10 cm to 20 cm lower than the liquid level in the treatment tank 1; a first aeration head 8 is provided at the bottom of the treatment tank 1, and the first aeration head 8 is installed between the first baffle 2 and the second baffle 3.

[0017] When treating oily wastewater, the wastewater flows from the sewage pool through the water inlet pipe 5 into the water inlet 4. The water inlet 4 is trumpet-shaped. The flow rate of the wastewater will drop significantly after entering. At this time, some oil droplets in the water will float to the upper part of the first partition 2 under the action of buoyancy. After compressed air is introduced into the first aeration head 8, the first aeration head 8 will generate many small bubbles in the treatment tank 1. When these bubbles float, they can drive the wastewater between the first partition 2 and the second partition 3 to flow upward, thereby accelerating the flow of wastewater from the left to the right of the first partition 2. The small bubbles in the wastewater The oil droplets are also driven to float upward, and the oil droplets come into contact with the oil layer on the upper part of the treatment tank 1, so that the oil in the sewage remains on the water surface, thereby forming stratification. The water at the bottom of the treatment tank 1 flows out through the third outlet pipe 12, while the oil layer on the upper part of the treatment tank 1 flows into the static tank through the first outlet pipe 7 after passing through the overflow tank 6. After the sewage is treated by the treatment tank 1, most of the water in the original sewage flows out from the third outlet pipe 12, so that the oil content of the treated sewage is increased. After standing in the static tank, the oil and water layers can be further separated, thereby achieving efficient oil-water separation.

[0018] The device forms a vertical channel by separating the sewage into two parts by the first partition 2 and the second partition 3, and utilizes the first aeration head 8 to stir the sewage during aeration, so that the liquid level is raised while the sewage is aerated, thereby accelerating the flow to the right side of the treatment tank 1.

[0019] The trumpet-shaped water inlet 4 can slow down the flow rate of the oily wastewater, so that a part of the oil droplets in the oily wastewater floats to the space between the first partition 2 and the side wall of the treatment tank 1. The space is relatively narrow, which is conducive to concentrating the oil layer. The oil layer on the upper layer of the space is sucked away through the second water outlet pipe 11 and discharged into the static tank for static standing, thereby improving the efficiency of oil-water separation.

[0020] In a preferred embodiment, a grille plate 9 is provided between the treatment tank 1 and the upper portion of the first partition 2. The grille plate 9 is 15 cm to 30 cm higher than the water inlet 4. The grille plate 9 can slow down the impact of the water flow, preventing the water flow entering the water inlet 4 from impacting the oil layer upward, and facilitating the concentration of oil droplets between the treatment tank 1 and the upper portion of the first partition 2.

[0021] Preferably, a second outlet pipe 11 is provided above the grid plate 9, and the second outlet pipe 11 is 10 cm to 20 cm higher than the grid plate 9, so that the concentrated oil layer between the treatment tank 1 and the upper part of the first partition plate 2 can be discharged through the second outlet pipe 11. The treatment tank 1 is provided with a third outlet pipe 12 on the side away from the water inlet 4. The third outlet pipe 12 is connected to the bottom of the treatment tank 1. After the sewage on the right side of the treatment tank 1 is aerated, the oil droplets are carried to the upper layer of the sewage by the bubbles. At this time, the sewage is led out at the lower layer of the sewage through the third outlet pipe 12 to achieve oil-water separation, thereby increasing the oil content of the sewage in the treatment tank 1, so that it can flow into the static tank for centralized treatment after passing through the overflow tank 6.

[0022] In a preferred embodiment, the water inlet 4 is trumpet-shaped, so that after the sewage enters the water inlet 4, the diameter increases and the flow rate slows down, which makes it easier for oil droplets in the sewage to float up under the action of buoyancy.

[0023] In a specific embodiment, a second aeration head 10 is further installed at the bottom of the treatment tank 1. The first aeration head 8 and the second aeration head 10 are connected to the air source through an air pipe 13. After the air source inputs compressed air, it is discharged from the first aeration head 8 and the second aeration head 10 into the treatment tank 1. When the bubbles rise, they drive the small oil droplets to float up, thereby accelerating the oil-water separation speed and concentrating the oil droplets in the upper layer of the treatment tank 1.

[0024] Specifically, the lower end of the first baffle 2 is bent away from the first aeration head 8, thereby guiding the bubbles generated by the first aeration head 8 to float upward from between the first baffle 2 and the second baffle 3, thereby accelerating the flow of sewage during aeration.

[0025] Of course, the present invention may have many other implementations. Based on this implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present invention.

Claims

1. An oily wastewater treatment device, characterized in that: include: A treatment tank (1), a first partition (2), and a second partition (3); a water inlet (4) is provided on one side of the treatment tank (1); the water inlet (4) is connected to the sewage tank through a water inlet pipe (5); an overflow tank (6) is provided on the other side of the treatment tank (1); the upper part of the overflow tank (6) is communicated with the upper part of the treatment tank (1); the lower part of the overflow tank (6) is connected to the static tank through a first water outlet pipe (7); the first partition (2) is vertically installed on one side of the treatment tank (1); the upper part of the first partition (2) is connected to the treatment tank (1) The upper end of the first partition (2) is flush with the bottom of the treatment tank (1), and the distance between the lower part of the first partition (2) and the bottom of the treatment tank (1) is 30 cm to 50 cm; the second partition (3) is vertically installed in the treatment tank (1), the bottom of the second partition (3) is connected to the bottom of the treatment tank (1), and the upper part of the second partition (3) is 10 cm to 20 cm lower than the liquid level in the treatment tank (1); the bottom of the treatment tank (1) is provided with a first aeration head (8), and the first aeration head (8) is installed between the first partition (2) and the second partition (3).

2. The oily wastewater treatment device according to claim 1, characterized in that: A grid plate (9) is provided between the treatment tank (1) and the upper portion of the first partition plate (2), and the grid plate (9) is 15 cm to 30 cm higher than the water inlet (4).

3. The oily wastewater treatment device according to claim 2, characterized in that: A second water outlet pipe (11) is provided above the grid plate (9), and the height between the second water outlet pipe (11) and the grid plate (9) is 10 cm to 20 cm. The treatment tank (1) is provided with a third water outlet pipe (12) on a side away from the water inlet (4), and the third water outlet pipe (12) is communicated with the bottom of the treatment tank (1).

4. The oily wastewater treatment device according to claim 1, characterized in that: The water inlet (4) is trumpet-shaped.

5. The oily wastewater treatment device according to claim 1, characterized in that: A second aeration head (10) is also installed at the bottom of the treatment tank (1), and the first aeration head (8) and the second aeration head (10) are connected to an air source via an air pipe (13).

6. The oily wastewater treatment device according to claim 1, characterized in that: The lower end of the first partition (2) is bent in a direction away from the first aeration head (8).

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