Air float oil removal system

Abstract

The utility model discloses a kind of air floatation oil removal systems, including the conical shell of vertical structure, coaxially arranged center cylinder is fixedly installed in conical shell inner cavity top, cyclone chamber is formed between center cylinder and conical shell, cyclone chamber bottom is communicated with the middle part of conical shell inner cavity, water inlet pipe is installed on the lateral wall of cyclone chamber, water inlet pipe is set along the tangent direction of cyclone chamber;Center cylinder inner wall is fixedly installed with drainage shell, and the top of drainage shell is equipped with circular opening, annular slag-collecting chamber is formed between the outer wall of drainage shell and the inner wall of center cylinder, and scraper is installed above the circular opening of drainage shell.The air floatation oil removal system provided by the utility model is compact and reasonable in structure, and can improve the mixing flocculation efficiency and oil removal efficiency.

Description

Technical Field

[0001] This utility model relates to an air flotation oil removal system, belonging to the field of wastewater treatment technology. Background Technology

[0002] Air flotation oil removal devices are widely used in the treatment of oily wastewater. The core principle of air flotation oil removal is to introduce a large number of microbubbles into the water, causing them to adhere to oil droplets and suspended solids, forming flocs with an overall density less than water. Under the action of buoyancy, the flocs quickly float to the water surface, thus forming scum, which is removed by a scum scraper, achieving the purpose of oil-water separation.

[0003] Traditional air flotation oil removal devices typically use horizontal, rectangular tanks, usually divided into mixing, reaction, and separation zones. They suffer from loose structures and large floor space requirements, making them generally unsuitable for space-constrained applications.

[0004] The mixing zone requires a separate mechanical agitator or pipeline mixer, and mixing and flocculation take a relatively long time. In the separation zone, the water flow is basically horizontal or slow, and the oil droplets float mainly due to the static buoyancy of the bubbles, making them easily affected by water flow disturbances.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] This invention addresses the shortcomings of the prior art by providing an air flotation oil removal system with a compact and reasonable structure, which can improve mixing and flocculation efficiency as well as oil removal efficiency.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: The air flotation oil removal system includes a vertical conical shell. A central cylinder, coaxially arranged with the conical shell, is fixedly installed at the top of the conical shell's inner cavity. A swirling cavity is formed between the central cylinder and the conical shell. The bottom of the swirling cavity is connected to the middle of the conical shell's inner cavity. An inlet pipe is installed on the side wall of the swirling cavity, and the inlet pipe is arranged along the tangential direction of the swirling cavity. A guide shell is fixedly installed on the inner wall of the central cylinder. The guide shell has a circular opening at its top. An annular slag collection cavity is formed between the outer wall of the guide shell and the inner wall of the central cylinder. A scraper is installed above the circular opening of the guide shell.

[0008] Furthermore, the water inlet pipe is connected to the bottom of the flocculant storage tank via a reagent addition pipe.

[0009] Furthermore, an air distribution head is installed at the bottom of the inner cavity of the conical shell, and the air distribution head adopts an inverted conical structure.

[0010] Furthermore, the bottom of the air distribution head is connected to the air intake pipe.

[0011] Furthermore, a drain pipe is installed at the bottom of the inner cavity of the conical shell, and a drain valve is installed on the drain pipe.

[0012] Furthermore, the scraper is fixed horizontally to the end of the output shaft of the geared motor.

[0013] Furthermore, the geared motor is fixedly mounted above the central cylinder via a support base.

[0014] Furthermore, the output shaft of the geared motor is set vertically downwards.

[0015] Furthermore, a slag discharge pipe connected to the annular slag collection chamber is fixedly installed on the side wall of the chamber.

[0016] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: Adopting a vertical conical integrated design, multiple processing units are highly integrated, achieving single-tank processing, which greatly reduces the size of the equipment and is particularly suitable for space-constrained occasions; High-intensity swirling is used to achieve instantaneous mixing, allowing the reagent to collide fully with, destabilize, and coagulate with oil droplets and suspended matter in an instant. The resulting flocs are larger and denser, which greatly shortens the pretreatment time and reduces the amount of reagent used. After undergoing cyclone pretreatment, the water flows downward into the main separation zone of the conical shell. At the same time, bubbles move upward from the bottom center, forming a high-concentration collision zone in the central area, which significantly increases the adhesion probability between bubbles and flocs, thereby improving the oil removal efficiency.

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram showing the flow of oily wastewater during the treatment process.

[0019] In the diagram, 1-conical shell, 2-water inlet pipe, 3-flocculating agent storage tank, 4-dosage addition pipe, 5-central cylinder, 6-vortex chamber, 7-air distribution head, 8-air inlet pipe, 9-drainage pipe, 10-gear motor, 11-scraper, 12-drainage shell, 13-annular slag collection chamber, 14-slag discharge pipe. Detailed Implementation

[0020] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0021] like Figures 1-3 As shown in the figure, this utility model provides an air flotation oil removal system, including a vertical conical shell 1. A central cylinder 5 is fixedly installed on the top of the inner cavity of the conical shell 1 and is coaxially arranged therewith. A vortex cavity 6 is formed between the central cylinder 5 and the conical shell 1. The bottom of the vortex cavity 6 is connected to the middle of the inner cavity of the conical shell 1. A water inlet pipe 2 is installed on the side wall of the vortex cavity 6 and is arranged along the tangential direction of the vortex cavity 6.

[0022] The inlet pipe 2 is connected to the bottom of the flocculant storage tank 3 via the reagent addition pipe 4. The reagent addition pipe 4 delivers the reagent from the flocculant storage tank 3 to the inlet pipe 2. The oily wastewater delivered by the inlet pipe 2 and the reagent delivered by the reagent addition pipe 4 are collected and then enter the vortex chamber 6 and the inner cavity of the conical shell 1 in sequence for thorough mixing. This causes the fine oil droplets and suspended solids to coagulate into larger flocs, which are more easily captured by air bubbles, greatly improving the oil removal efficiency.

[0023] An air distribution head 7 is installed at the bottom of the inner cavity of the conical shell 1. The air distribution head 7 adopts an inverted conical structure. The top of the air distribution head 7 is used to generate microbubbles, and the bottom of the air distribution head 7 is connected to the air inlet pipe 8. The microbubbles generated by the air distribution head 7 can contact and adhere to oil droplets and suspended particles in the wastewater, causing the oil droplets and suspended particles to rise.

[0024] A drain pipe 9 is installed at the bottom of the inner cavity of the conical shell 1, and a drain valve is installed on the drain pipe 9.

[0025] A flow-guiding shell 12 is fixedly installed on the inner wall of the central cylinder 5. The top of the flow-guiding shell 12 is provided with a circular opening, and an annular slag collection cavity 13 is formed between the outer wall of the flow-guiding shell 12 and the inner wall of the central cylinder 5.

[0026] A scraper 11 is installed above the circular opening of the drainage shell 12. The scraper 11 is fixed horizontally to the end of the output shaft of the geared motor 10. The geared motor 10 is fixedly installed above the central cylinder 5 by a support base, and the output shaft of the geared motor 10 is vertically downward. The geared motor 10 drives the scraper 11 to rotate, scraping off the scum on the liquid surface and scraping it into the annular scum collection chamber 13.

[0027] A slag discharge pipe 14 is fixedly installed on the side wall of the annular slag collection chamber 13 and communicates with it for outputting slag.

[0028] The specific working principle of this utility model is as follows: Oily wastewater and flocculant from the storage tank are initially mixed at the inlet of the inlet pipe. The mixed liquid enters the vortex chamber at high speed along the tangential direction. The strong vortex motion allows the flocculant to fully and quickly contact and react with the wastewater and oil droplets, forming larger flocs that are more easily captured by bubbles. The water pretreated by the vortex flows downward into the main separation zone of the conical shell. At the same time, gas enters the air distribution head through the air inlet pipe. The air distribution head generates a large number of microbubbles. As the microbubbles slowly rise, they collide with the flocs. Under the action of buoyancy, the flocs quickly float to the liquid surface, forming a layer of scum. The scum is scraped into the annular scum collection chamber by a scraper. Finally, it is continuously or intermittently discharged from the system through the scum discharge pipe. After the above steps, the water in the lower part of the conical shell is purified water and is discharged from the system through the bottom drain pipe.

[0029] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. An air flotation oil removal system, characterized in that: The conical shell (1) with a vertical structure is fixedly installed at the top of the inner cavity of the conical shell (1) and a central cylinder (5) is coaxially arranged therewith. A swirling cavity (6) is formed between the central cylinder (5) and the conical shell (1). The bottom of the swirling cavity (6) is connected to the middle of the inner cavity of the conical shell (1). A water inlet pipe (2) is installed on the side wall of the swirling cavity (6) and the water inlet pipe (2) is arranged along the tangential direction of the swirling cavity (6). A flow guide shell (12) is fixedly installed on the inner wall of the central cylinder (5). The top of the flow guide shell (12) has a circular opening. An annular slag collection chamber (13) is formed between the outer wall of the flow guide shell (12) and the inner wall of the central cylinder (5). A scraper (11) is installed above the circular opening of the flow guide shell (12).

2. The air flotation oil removal system as described in claim 1, characterized in that: The water inlet pipe (2) is connected to the bottom of the flocculant storage tank (3) via the reagent addition pipe (4).

3. The air flotation oil removal system as described in claim 1, characterized in that: An air distribution head (7) is installed at the bottom of the inner cavity of the conical shell (1), and the air distribution head (7) adopts an inverted conical structure.

4. The air flotation oil removal system as described in claim 3, characterized in that: The bottom of the air distribution head (7) is connected to the air inlet pipe (8).

5. The air flotation oil removal system as described in claim 1, characterized in that: A drain pipe (9) is installed at the bottom of the inner cavity of the conical shell (1), and a drain valve is installed on the drain pipe (9).

6. The air flotation oil removal system as described in claim 1, characterized in that: The scraper (11) is fixed to the end of the output shaft of the geared motor (10) in the horizontal direction.

7. The air flotation oil removal system as described in claim 6, characterized in that: The geared motor (10) is fixedly installed above the central cylinder (5) via a support base.

8. The air flotation oil removal system as described in claim 7, characterized in that: The output shaft of the geared motor (10) is set vertically downward.

9. The air flotation oil removal system as described in claim 1, characterized in that: A slag discharge pipe (14) connected to the annular slag collection chamber (13) is fixedly installed on its side wall.

Images