Air flotation machine for oil-water separation

Abstract

The invention relates to the technical field of air flotation equipment, and provides an air flotation machine for oil-water separation, the air flotation machine comprises a box body, an oil discharge hole and a water discharge pipe, a floating unit is arranged in the box body, and the floating unit comprises a floating rod, a floater and a contraction spring arranged on the floating rod in a sleeving manner; the vertical oscillator is arranged at the bottom of the box body and drives the upper baffle and the lower baffle to periodically vibrate up and down, so that the water surface generates annular diffusion oscillation. Through the synergistic effect of the floating unit and the oscillator, the water surface vibrates up and down, in combination with elastic resonance of the floating unit, annular diffusion oscillation of the water surface is remarkably enhanced, vertical layering of oil drops and suspended particles is accelerated, and the separation efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air flotation equipment, and in particular to an air flotation machine for oil-water separation. Background Art

[0002] Among existing oil-water separation technologies, the reference document CN115093038A proposes a water-oil separation device and method for treating oily wastewater. This device uses a buoy to control the wastewater level, a second motor to drive the horizontal reciprocating motion of a moving box to achieve wastewater oscillation, and a scraper to remove grease adhering to the inner wall of a settling tank. However, this solution has significant drawbacks:

[0003] Limited separation efficiency: The horizontal oscillation mode cannot fully stimulate the oil-water interfacial tension, resulting in insufficient vertical separation of oil and suspended particles, resulting in a long separation cycle. To address this issue, we propose an air flotation machine for oil-water separation. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present invention provides an air flotation machine for oil-water separation, which overcomes the deficiencies of the prior art, has a reasonable design and a compact structure, and solves the problems raised in the background art.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A flotation machine for oil-water separation includes a housing, an oil drain hole, and a drain pipe. A floating unit is provided in the housing, including a floating rod, a float, and a contraction spring sleeved on the floating rod. The bottom of the float is a streamlined conical structure, which is elastically connected to the upper baffle via the contraction spring. A vertical oscillator is provided at the bottom of the housing to drive the upper and lower baffles to vibrate periodically up and down, causing annular diffusion oscillations on the water surface.

[0009] Preferably, a one-way valve in which a wedge-shaped slide rod and a lifting rod are linked is provided in the drain pipe. The lifting rod triggers the displacement of the wedge-shaped slide rod through the wedge block at the end of the vertical rod, thereby realizing adaptive opening and closing of the drain valve.

[0010] Preferably, a flap mechanism is provided in the inclined groove at the bottom of the box, comprising an L-shaped vertical plate, a horizontal plate and a flap shaft. The flap is linked to the driving rod through an inclined rod to periodically disturb the deposited particles.

[0011] Preferably, the upper baffle and the lower baffle are cross-fixed to the inner wall of the box, and the distance between the two is adjustable to adapt to the separation requirements of sewage with different viscosities.

[0012] Preferably, the contact surface between the wedge block and the wedge-shaped slide bar is a complementary inclined plane, and the wedge-shaped slide bar abuts against the trigger shaft of the one-way valve to ensure that the one-way valve can be opened.

[0013] Preferably, the flap shaft is hinged to the inner wall of the inclined groove, and the vertical plate is provided with an opening.

[0014] Preferably, the oil drain holes are arranged in a ring at the highest oscillating water level line of the box body, and their apertures are gradually distributed in the circumferential direction to match the dynamic change of the oil layer thickness.

[0015] (III) Beneficial Effects

[0016] The embodiment of the present invention provides a dissolved air flotation machine for oil-water separation, which has the following beneficial effects:

[0017] 1. Through the synergistic effect of the floating unit and the oscillator, the water surface vibrates up and down, and combined with the elastic resonance of the floating unit, the annular diffusion oscillation of the water surface is significantly enhanced, accelerating the vertical stratification of oil droplets and suspended particles, and significantly improving the separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic diagram inside the box body of the structure of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of the floating unit of the present invention;

[0021] Figure 4 is of the present invention Figure 2 partial schematic diagram.

[0022] In the figure: 1. Box body; 11. Oil drain hole; 12. Drain pipe; 2. Upper baffle; 3. Lower baffle; 31. Guide rod; 32. Tension spring; 4. Floating unit; 41. Floating rod; 42. Abuting plate; 43. Float; 44. Limit ring; 45. Compression spring; 5. Lifting rod; 51. Inclined rod; 52. Rotating rod; 53. Rotating shaft; 54. Driving rod; 55. Vertical plate; 56. Horizontal plate; 57. Flap shaft; 6. Vertical rod; 61. Wedge block; 62. Wedge-shaped slide bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Referring to the attached Figures 1-4 , a dissolved air flotation machine for oil-water separation, includes a box body 1. An oil discharge hole 11 is annularly provided at the upper part of the box body 1, and the oil discharge holes 11 are at the same height. A sewage pipe is connected to the box body 1 to accommodate sewage, and an air flotation pipe is also connected to convey air into the water to remove suspended particles, so that the particulate matter in the sewage floats on the surface of the water. At the same time, since the density of oil is less than that of water, both the oil and the particulate matter in the sewage will gather on the surface of the water, and the heavier particulate matter will settle at the bottom of the box body 1. An inclined groove for guiding the heavier particulate matter is also provided at the bottom of the box body 1, and a drain pipe 12 is connected to the side wall of the box body 1 and extends inward;

[0025] An oscillator is also provided on the bottom of the box body 1 for vibrating the box body 1 and driving the water to oscillate. Since an upper baffle 2 and a lower baffle 3 are also connected inside the box body 1, the upper baffle 2 and the lower baffle 3 are cross-fixed on the inner wall of the box body 1, and a distance is left between the upper baffle 2 and the lower baffle 3 to facilitate accommodating the floating unit 4, that is, the oscillator will drive the upper baffle 2 and the lower baffle 3 thereon to oscillate;

[0026] The floating unit 4 is located at the central part of the box body 1. The floating unit 4 includes a floating rod 41, a supporting plate 42, a float 43, a limiting ring 44, and a compression spring 45. The floating rod 41 is vertically penetrated through the upper baffle 2, the float 43 is connected to the upper end of the floating rod 41, the supporting plate 42 is connected to the lower section of the floating rod 41. The limiting ring 44 is sleeved on the floating rod 41, and a compression spring 45 is sleeved on the floating rod 41 between the limiting ring 44 and the upper baffle 2. Both ends of the compression spring 45 are fixed on the upper baffle 2 and the floating rod 41 respectively. Due to the buoyancy of the water, the float 43 will float upward, stretching the compression spring 45 to move upward. At the same time, the oscillator drives the upper baffle 2 to vibrate, which will further cause the floating unit 4 to stretch the compression spring 45 upward. And the compression spring 45 is fixed to the upper baffle 2, and the upper baffle 2 will pull the compression spring 45 to make the compression spring 45 contract and quickly rebound the floating rod 41. At this time, the floating unit 4 forms an impact force downward, and upward it will further improve the oscillation effect of the water surface. Since the floating unit 4 is located at the central position of the box body 1, the water surface will oscillate in a circular shape around the box body 1, and the water surface at the highest point of the oscillation will overflow through the oil discharge hole 11 and be discharged;

[0027] In order to better increase the downward impact force of the floating unit 4, the bottom of the float 43 is made into a conical structure, so that the bottom of the float 43 is streamlined to reduce the acting force of water on the bottom of the float 43;

[0028] The lower baffle 3 is also provided with a lifting guide rod 31, a tension spring 32 is sleeved on the guide rod 31, and a lifting rod 5 is connected to the top of the guide rod 31, so that the tension spring 32 is located between the guide rod 31 and the lifting rod 5 to form an elastic fixation. One side of the lifting rod 5 is vertically connected to a vertical rod 6, and the outer end of the vertical rod 6 is connected to a wedge 61. A wedge-shaped sliding rod 62 is also provided in the drain pipe 12, and the inner wall of the drain pipe 12 is provided with a sliding groove for accommodating the wedge-shaped sliding rod 62, and the wedge sliding rod 62 extends in the direction of the vertical rod 6 and corresponds to the wedge 61, that is, the wedge surface of the wedge 61 is aligned with the wedge sliding rod. The wedge surfaces of the rod 62 correspond to each other, and the outer end of the wedge-shaped slide rod 62 is connected to a one-way valve. When the abutting plate 42 abuts on the lifting rod 5, the lifting rod 5 drops as a whole. At this time, the wedge block 61 pushes the wedge-shaped slide rod 62 to slide along the slide groove of the drain pipe 12 until the wedge-shaped slide rod 62 abuts on the trigger shaft of the one-way valve. At this time, the one-way valve is in the open state, and the purified water is discharged outward through the drain pipe 12. When the abutting plate 42 is not abutted, the spring at the one-way valve core rebounds, pushing the trigger shaft of the one-way valve to reset and abut the wedge-shaped slide rod 62, thereby closing the one-way valve and preventing the purified water from being discharged.

[0029] The other side of the lifting rod 5 is hinged with an inclined rod 51, and a protrusion is provided at the hinge to allow the inclined rod 51 to rotate in one direction only, limiting the counterclockwise rotation of the inclined rod 51. A rotating shaft 53 and a flap are provided in the inclined groove for guiding heavier particles. A rotating rod 52 is sleeved on the rotating shaft 53 and the rotating rod 52 is hinged to the end of the inclined rod 51. A driving rod 54 is also connected to the end of the inclined rod 51. The inclined rod 51 rotates around the rotating shaft 53, that is, the driving rod 54 can abut the flap, causing the flap to shake, thereby realizing the convenient discharge of particles.

[0030] The flap includes an L-shaped vertical plate 55 and a horizontal plate 56. A flap shaft 57 is provided at the connection between the vertical plate 55 and the horizontal plate 56, and the flap shaft 57 is installed in the inclined groove so that it can be flipped. The vertical plate 55 is open and will not block heavier particles.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air flotation machine for oil-water separation, comprising a box body (1), an oil discharge hole (11), and a drain pipe (12), characterized in that: A floating unit (4) is arranged in the box body (1), including a floating rod (41), a float (43), and a compression spring (45) sleeved on the floating rod. The bottom of the float (43) is a streamlined conical structure, and it is elastically connected to the upper baffle (2) through the compression spring (45); A vertical oscillator is arranged at the bottom of the box body (1) to drive the upper baffle (2) and the lower baffle (3) to vibrate up and down periodically, causing annular diffusion oscillation on the water surface.

2. The air flotation machine for oil-water separation according to claim 1, characterized in that: A one-way valve with a wedge-shaped slide rod (62) linked to a lifting rod (5) is arranged in the drain pipe (12). The lifting rod (5) triggers the displacement of the wedge-shaped slide rod (62) through a wedge block (61) at the end of a vertical rod (6) to realize the adaptive opening and closing of the drain valve.

3. The air flotation machine for oil-water separation according to claim 1, characterized in that: A flap mechanism is arranged in the inclined groove at the bottom of the box body (1), including an L-shaped vertical plate (55), a horizontal plate (56), and a flap shaft (57). The flap is linked to a driving rod (54) through an inclined rod (51) to periodically disturb the deposited particles.

4. The air flotation machine for oil-water separation according to claim 1, wherein: The upper baffle (2) and the lower baffle (3) are cross-fixed on the inner wall of the box body, and the distance between them is adjustable to adapt to the separation requirements of sewage with different viscosities.

5. The air flotation machine for oil-water separation according to claim 1, characterized in that: The contact surface between the wedge block (61) and the wedge-shaped slide rod (62) is a complementary inclined plane, and the wedge-shaped slide rod (62) abuts against the trigger shaft of the one-way valve to ensure that the one-way valve can be opened.

6. The air flotation machine for oil-water separation according to claim 3, characterized in that: The flap shaft (57) is hinged to the inner wall of the inclined groove, and the vertical plate (55) is provided with openings.

7. An air flotation machine for oil-water separation according to claim 1, characterized in that: The oil discharge hole (11) is arranged in a ring at the highest oscillation water level line of the box body (1), and its aperture is distributed with a gradual change along the circumferential direction to match the dynamic change of the oil layer thickness.

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