Device for carrying out air flotation test on oily sludge

Abstract

The utility model discloses a device for carrying out an air flotation test on oily sludge, and belongs to the technical field of mineral oily sludge test devices. The device comprises a box body with a hollow interior and an open top, the box body is of a rectangular structure, and an inner cavity of the box body is sequentially divided into a first air flotation area, a second air flotation area, an oxidation area and an oil collection area through three overflow plates; a transverse lapping plate is also arranged at the top of the box body corresponding to the first air floatation area and the second air floatation area; an air flotation machine is arranged on the transverse lapping plate; a feeding pipe is arranged on the side wall of the box body; one end of the feeding pipe is inserted into the first air floatation area; a mud discharging pipe, a water discharging pipe and an oil discharging pipe are further arranged on the lower side of the box body; according to the utility model, the problems that the layering effect and the oil phase recovery rate are influenced and the stability of the air flotation efficiency is difficult to guarantee due to incomplete oil-water separation in the current conventional air flotation equipment are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of testing devices for oily sludge, and specifically to a device for conducting air flotation tests on oily sludge. Background Technology

[0002] Oily sludge, a typical hazardous waste generated by industries such as petroleum extraction, refining, and machining, has always presented a technical challenge in the environmental protection field in terms of its harmless treatment and resource utilization. Air flotation, due to its high efficiency in separating oil, water, and solid phases, is widely used in oily sludge treatment processes. However, traditional air flotation equipment often employs a single-box structure, but researchers have found that insufficient residence time for the oily sludge and inadequate bubble contact efficiency lead to incomplete oil-water separation, affecting the stratification effect and oil phase recovery rate. Furthermore, it struggles to adapt to the bubble distribution requirements of sludge with different viscosities, easily resulting in bubble aggregation or uneven distribution, thus impacting flotation efficiency. Therefore, a flotation testing device is needed that combines high-efficiency separation, anti-clogging performance, and flexible adjustment capabilities to meet the refined testing needs of complex oily sludge treatment scenarios. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a device for conducting air flotation tests on oily sludge, so as to solve the problem that current conventional air flotation equipment has incomplete oil-water separation, which affects the stratification effect and oil phase recovery rate, and makes it difficult to ensure stable air flotation efficiency.

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] An apparatus for conducting air flotation tests on oily sludge includes a hollow, open-top box. The box has a rectangular structure, and its interior is divided into a first air flotation zone, a second air flotation zone, an oxidation zone, and an oil collection zone by three overflow plates. A horizontal ramp is provided at the top of the box corresponding to the first and second air flotation zones. An air flotation machine is installed on the ramp. A feed pipe is provided on the side wall of the box, with one end of the feed pipe inserted into the first air flotation zone. A sludge discharge pipe, a drain pipe, and an oil discharge pipe are also provided on the lower side of the box.

[0006] Preferably, starting from the first air flotation zone, the height of the three overflow plates decreases sequentially; the bottom areas of the first air flotation zone and the second air flotation zone are the same; the bottom area of ​​the oil collecting zone is larger than the bottom area of ​​the oxidation zone, but smaller than the bottom area of ​​the first air flotation zone.

[0007] Preferably, a telescopic support rod is provided on the outer end face of the box near the feed pipe; the telescopic support rod is arranged vertically, and a pipe clamp is rotatably installed on the top of the telescopic support rod; the pipe clamp is a U-shaped groove component.

[0008] Preferably, a pair of extension plates are provided on the top of the housing; the extension plates extend outward; positioning holes are provided at corresponding positions on the extension plates and the cross plate, and the two are detachably connected at the positioning holes by bolt assembly.

[0009] Preferably, a cantilevered support plate is provided on the side end face of the box; a control switch is provided on the support plate; the control switch is connected to the air flotation machine through a wire, and the control switch can control the operation state of the air flotation machine.

[0010] Preferably, several handles are also provided on the side end face of the box.

[0011] Preferably, a pair of positioning blocks installed at different heights are respectively provided on the overflow plates located in the first and second air flotation zones; a rotatable screw and a guide rod are installed between the upper and lower positioning blocks; one end of the screw extends from the top of the housing; a manual turn head is installed on the top of the screw, and a nut movable block is installed on the screw and the guide rod; the nut movable block can move along the height direction of the screw through threaded engagement; the air outlet pipe of the air flotation machine is correspondingly set on the nut movable block.

[0012] Preferably, a through hole is opened in the middle of the horizontal slab, and several pipe clamps are provided at the bottom of the horizontal slab; the air outlet pipe of the air flotation machine passes through the through hole and is arranged along the pipe clamps.

[0013] The beneficial effects of this utility model are reflected in the following aspects:

[0014] 1. By connecting the first flotation zone, the second flotation zone, and the oxidation zone in series with overflow plates of successively decreasing height, a liquid level gradient difference is formed, which slows down the oil phase flow rate, prolongs the residence time of oil sludge, promotes the enrichment of floating oil, and enhances the contact efficiency between air bubbles and oil sludge, thus solving the problem of incomplete separation in traditional single-zone flotation; reducing secondary pollution and achieving efficient separation of oil, water, and sludge.

[0015] 2. By manually rotating the head to move the nut movable block relative to the screw, the position and height of the air outlet pipe of the air flotation machine can be precisely adjusted to adapt to the bubble distribution requirements of sludge with different viscosities, and to avoid bubble aggregation or uneven distribution; at the same time, the pipe clamp is placed along the bottom of the horizontal plate to further increase the position range of the air outlet pipe and meet the diverse needs of different test scenarios.

[0016] 3. The detachable cross plate allows the air flotation machine to be disassembled and maintained independently, improving maintenance efficiency; at the same time, the pipe clamp and feed pipe can be connected with the dual discharge structure of the bio-fermentation tube, reducing malfunctions caused by interface blockage.

[0017] 4. The control switch is integrated on the pallet, which can start and stop the air flotation machine with one button, reducing the risk of misoperation; the handle is set on the box for easy handling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention in an embodiment;

[0019] Figure 2 This is a side sectional view of the overflow plate location of the box body in this embodiment;

[0020] Figure 3 This is an installation diagram of the positioning block, screw, guide rod, manual rotary head, and nut movable block in this embodiment;

[0021] Figure 4 This is a bottom view of the horizontal ramp in this embodiment;

[0022] Explanation of reference numerals in the attached drawings: 1. Box body, 2. First air flotation zone, 3. Second air flotation zone, 4. Oxidation zone, 5. Oil collection zone, 6. Horizontal plate, 7. Air flotation machine, 8. Feed pipe, 9. Overflow plate, 10. Sludge discharge pipe, 11. Drainage pipe, 12. Oil discharge pipe, 13. Telescopic support rod, 14. Pipe clamp, 15. Extension plate, 16. Support plate, 17. Control switch, 18. Handle, 19. Positioning block, 20. Screw, 21. Guide rod, 22. Manual rotary head, 23. Nut movable block, 24. Pipe clamp. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] Example:

[0025] Reference Figure 1 This embodiment provides an apparatus for conducting air flotation tests on oily sludge. It includes a hollow, open-top box 1. The box 1 has a rectangular structure, and its interior is divided into a first air flotation zone 2, a second air flotation zone 3, an oxidation zone 4, and an oil collection zone 5 by three overflow plates 9. A horizontal ramp 6 is also provided at the top of the box 1 corresponding to the positions of the first air flotation zone 2 and the second air flotation zone 3. An air flotation machine 7 is mounted on the ramp 6. A feed pipe 8 is provided on the side wall of the box 1, with one end inserted into the first air flotation zone 2. A sludge discharge pipe 10, a drain pipe 11, and an oil discharge pipe 12 are also provided on the lower side of the box 1. In this embodiment, two sludge discharge pipes 10 are provided, corresponding to the first air flotation zone 2 and the second air flotation zone 3, respectively. The drain pipe 11 and the oil discharge pipe 12 are corresponding to the oxidation zone 4 and the oil collection zone 5, respectively.

[0026] Starting from the first air flotation zone 2, the heights of the three overflow plates 9 decrease sequentially; the bottom areas of the first air flotation zone 2 and the second air flotation zone 3 are the same; the bottom area of ​​the oil collecting zone 5 is greater than that of the oxidation zone 4, but smaller than that of the first air flotation zone 2.

[0027] A telescopic support rod 13 is provided on the outer end face of the housing 1 near the feed pipe 8; the telescopic support rod 13 is arranged vertically, and a pipe clamp 14 is rotatably installed on the top of the telescopic support rod 13; the pipe clamp 14 is a U-shaped groove component. In this embodiment, the feed pipe is used to connect the incoming material introduced from the bio-fermentation tank, and the pipe clamp is used to position and cooperate with another discharge pipe of the bio-fermentation tank.

[0028] A pair of extension plates 15 are provided on the top of the housing 1; the extension plates 15 extend outward; positioning holes are provided at corresponding positions on the extension plates 15 and the cross plate 6, and the two are detachably connected at the positioning holes by bolt assembly.

[0029] A cantilevered support plate 16 is provided on the side end face of the housing 1; a control switch 17 is provided on the support plate 16; the control switch 17 is connected to the air flotation machine 7 through a wire, and the control switch 17 can control the operation state of the air flotation machine 7.

[0030] Several handles 18 are also provided on the side end face of the box body 1.

[0031] A pair of positioning blocks 19 installed at different heights are respectively provided on the overflow plate 9 located in the first air flotation zone 2 and the second air flotation zone 3; a rotatable screw 20 and a guide rod 21 are installed between the upper and lower positioning blocks 19; one end of the screw 20 extends from the top of the housing 1; a manual rotating head 22 is installed on the top of the screw 20, and a nut movable block 23 is installed on the screw 20 and the guide rod 21; the nut movable block 23 can move along the height direction of the screw 20 through threaded engagement; the air outlet pipe of the air flotation machine 7 is correspondingly set on the nut movable block 23.

[0032] A through hole is opened in the middle of the horizontal plate 6, and several pipe clamps 24 are provided at the bottom of the horizontal plate 6; the air outlet pipe of the air flotation machine 7 passes through the through hole and is arranged along the pipe clamps 24.

[0033] During operation, oily sludge is injected into the first flotation zone 2 via the feed pipe 8. Microbubbles generated by the flotation machine 7 flow through the outlet pipe into the mixture. The oil phase, carried by the bubbles, rises to the surface and overflows through the overflow plate 9 to the oil collection zone 5. The catalytic packing in the oxidation zone 4 degrades residual organic matter. The sludge-water mixture is then collected via a bottom sloping structure into the sludge discharge pipe 10 and drain pipe 11. Operators can adjust the flotation machine height, aeration intensity, and drain valve opening in real time. This design is particularly suitable for comparative experimental studies of different oily sludge ratios and reagent dosages under laboratory conditions.

Claims

1. An apparatus for conducting air flotation tests on oily sludge, characterized in that: It includes a hollow box (1) with an open top; the box (1) has a rectangular structure, and the inner cavity of the box (1) is divided into a first air flotation zone (2), a second air flotation zone (3), an oxidation zone (4) and an oil collection zone (5) in sequence by three overflow plates (9); a horizontal plate (6) is also provided at the top of the box (1) corresponding to the positions of the first air flotation zone (2) and the second air flotation zone (3); an air flotation machine (7) is provided on the horizontal plate (6); a feed pipe (8) is provided on the side wall of the box (1); one end of the feed pipe (8) is inserted into the first air flotation zone (2); a sludge discharge pipe (10), a drain pipe (11) and an oil discharge pipe (12) are also provided on the lower side of the box (1).

2. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: Starting from the first air flotation zone (2), the heights of the three overflow plates (9) decrease sequentially; the bottom areas of the first air flotation zone (2) and the second air flotation zone (3) are the same; the bottom area of ​​the oil collection zone (5) is greater than that of the oxidation zone (4), but smaller than that of the first air flotation zone (2).

3. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: A telescopic support rod (13) is provided on the outer end face of the box (1) near the feed pipe (8); the telescopic support rod (13) is arranged vertically, and a pipe clamp (14) is rotatably installed on the top of the telescopic support rod (13); the pipe clamp (14) is a U-shaped groove component.

4. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: A pair of extension plates (15) are provided on the top of the housing (1); the extension plates (15) extend outward; positioning holes are provided at corresponding positions on the extension plates (15) and the cross plate (6), and the two are detachably connected at the positioning holes by bolt assembly.

5. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: A cantilevered support plate (16) is provided on the side end face of the box (1); a control switch (17) is provided on the support plate (16); the control switch (17) is connected to the air flotation machine (7) through a wire, and the control switch (17) can control the operation state of the air flotation machine (7).

6. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: Several handles (18) are also provided on the side end face of the box (1).

7. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: A pair of positioning blocks (19) installed at different heights are respectively provided on the overflow plate (9) located in the first air flotation zone (2) and the second air flotation zone (3); a rotatable screw (20) and a guide rod (21) are installed between the upper and lower positioning blocks (19); one end of the screw (20) extends from the top of the box (1); a manual turn head (22) is installed on the top of the screw (20), and a nut movable block (23) is installed on the screw (20) and the guide rod (21); the nut movable block (23) can move along the height direction of the screw (20) through threaded engagement; the air outlet pipe of the air flotation machine (7) is correspondingly set on the nut movable block (23).

8. The apparatus for conducting air flotation tests on oily sludge according to claim 1, characterized in that: A through hole is opened in the middle of the horizontal plate (6), and several pipe clamps (24) are provided at the bottom of the horizontal plate (6); the air outlet pipe of the air flotation machine (7) is arranged along the pipe clamps (24) after passing through the through hole.

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