Compact rotational flow air flotation device suitable for offshore platform

Abstract

The utility model discloses a compact cyclone air flotation device suitable for an offshore platform, which comprises a shell, a quick separation component and a secondary separation component, a mixing cutter is arranged on the inner side of the shell, the quick separation component is positioned on the inner side of the shell, and the secondary separation component is positioned on the outer side of the shell. The rapid separation assembly comprises a first mixing cylinder, a second mixing cylinder, a guide plate and coalescence filler, the first mixing cylinder is fixed to the upper end of the mixing cutter, the second mixing cylinder is connected to the upper end of the first mixing cylinder through bolts, and the guide plate is welded to the upper end of the first mixing cylinder; the coalescence filler is arranged on the outer side of the second mixing barrel, the secondary separation assembly is located on the left side of the first mixing barrel, and the secondary separation assembly comprises a water pipe, a circulating water pump and a gas-liquid mixer. The separation speed can be increased, and meanwhile the conditions that the rotational flow strength is dissipated, the collision and adhesion efficiency of bubbles and oil drops is low, and the air flotation generator is prone to being blocked can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cyclone flotation devices, in particular to a compact cyclone flotation device suitable for offshore platforms. Background Art

[0002] Offshore platforms use cyclone flotation to remove oil and suspended matter from water. Some existing flotation devices have problems such as poor bubble generation and unclear flotation effect. As an important part of oil-water treatment, if the flotation equipment does not have a good treatment effect, it will increase the pressure of subsequent equipment. For example, the patent document with application number CN202110287145.4 discloses a device and method for treating oily wastewater. After mixing with a water ejector, it enters the purification chamber. The guide rotor blades in the chamber enhance the centrifugal effect, causing the oil droplets to gather and merge toward the center. At the same time, the release of bubbles accelerates the collision probability and floating speed of the oil droplets.

[0003] However, in order to increase the separation speed, the above-mentioned similar schemes make the diameter of the cyclone area wider, which leads to the dissipation of the cyclone intensity, low efficiency of collision and adhesion between bubbles and oil droplets, and easy clogging of the flotation generator. In addition, as the oily wastewater swirls upward, the bubble adsorption capacity is limited, and a large amount of oil in the oily wastewater is not adsorbed, so that the water and oil are not completely separated.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a compact cyclone flotation device suitable for offshore platforms is proposed. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model provides a compact cyclone flotation device suitable for offshore platforms, which solves the above-mentioned similar solutions proposed in the above-mentioned background technology. In order to increase the separation speed, the diameter of the cyclone area is made wider, which leads to the dissipation of the cyclone intensity, low efficiency of collision and adhesion between bubbles and oil droplets, and easy clogging of the flotation generator. In addition, as the oily wastewater swirls upward, the bubble adsorption capacity is limited, and a large amount of oil in the oily wastewater is not adsorbed, thereby causing the water and oil to not be completely separated.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a compact cyclone flotation device suitable for an offshore platform, comprising an outer shell, a quick separation assembly and a secondary separation assembly, a mixing cutter is arranged on the inner side of the outer shell, and the quick separation assembly is located on the inner side of the outer shell, and the quick separation assembly comprises a first mixing cylinder, a second mixing cylinder, a guide plate and a coalescing filler, and the first mixing cylinder is fixed to the upper end of the mixing cutter, and the second mixing cylinder is bolted to the upper end of the first mixing cylinder, and the guide plate is welded to the upper end of the first mixing cylinder, and the coalescing filler is arranged on the outer side of the second mixing cylinder, the secondary separation assembly is located on the left side of the first mixing cylinder, and the secondary separation assembly comprises a water pipe, a circulating water pump and a gas-liquid mixer, the water pipe is penetrated through the left side of the outer shell, and the circulating water pump is fixed to the upper end of the water pipe, and the gas-liquid mixer is arranged below the circulating water pump.

[0007] Furthermore, a water inlet is provided through the right end of the mixing cutter, and the blade of the mixing cutter is disc-type.

[0008] Furthermore, a plurality of groups of through holes are equidistantly arranged at the bottom of the second mixing cylinder, and the diameter of the first mixing cylinder is smaller than the diameter of the second mixing cylinder.

[0009] Furthermore, an arc-shaped plate is fixed to the upper end of the second mixing cylinder, and an oil cylinder is arranged at the center of the inner side of the first mixing cylinder.

[0010] Furthermore, the upper end of the water pipe is located outside the first mixing cylinder, and the lower end of the water pipe is located outside the second mixing cylinder.

[0011] Furthermore, a drain outlet is provided on the right side of the shell, and both ends of the drain outlet and the water pipe are tangent to the shell.

[0012] The utility model provides a compact cyclone flotation device suitable for offshore platforms, which has the following beneficial effects:

[0013] It can improve the separation speed while avoiding the dissipation of swirl intensity, low efficiency of bubble and oil droplet collision and adhesion, and easy clogging of the flotation generator. In addition, as the oily wastewater swirls upward, the amount of bubbles can be increased to avoid the limited adsorption capacity of bubbles, and the large amount of oil in the oily wastewater is not adsorbed, thereby avoiding the incomplete separation of water and oil, which is beneficial to improve the separation quality. The specific contents are as follows:

[0014] The oily sewage enters the outer shell through the mixing cutter and swirls upward along the two sets of mixing barrels. Due to the different diameters of the two sets of mixing barrels, the swirl intensity is large when the oily sewage first enters, so that the bubbles and oil droplets can collide and adsorb quickly. Then the diameter swirl weakens, which can separate the oil droplets from the water. The oily sewage that is not completely separated is then pumped out by a water pump, mixed with new gas, and re-enters the circulation separation, thereby improving the separation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the lattice printing structure of a compact cyclone flotation device suitable for offshore platforms of the utility model;

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of a compact cyclone flotation device suitable for offshore platforms according to the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a breathable net of a compact cyclone air flotation device suitable for an offshore platform according to the utility model;

[0018] Figure 4 The utility model is a compact cyclone flotation device suitable for offshore platforms. Figure 2 Enlarged structural diagram at A in the middle.

[0019] In the figure: 1. outer shell; 2. water inlet; 3. mixing cutter; 4. quick separation component; 401. first mixing cylinder; 402. second mixing cylinder; 403. guide plate; 404. agglomeration filler; 421. through hole; 5. oil cylinder; 6. secondary mixing component; 601. water pipe; 602. circulating water pump; 603. gas-liquid mixer; 7. drain outlet; 8. arc plate. Implementation

[0020] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0021] like Figures 1 to 4 As shown, a compact cyclone flotation device suitable for offshore platforms includes a housing 1, a quick separation component 4 and a secondary separation component 6. A mixing cutter 3 is arranged on the inner side of the housing 1. A water inlet 2 is arranged through the right end of the mixing cutter 3. A drain port 7 is arranged on the right side of the housing 1. Both ends of the drain port 7 and a water pipe 601 are tangent to the housing 1, and can quickly merge with the water flow to avoid interfering with the original cyclone of the water. The blade of the mixing cutter 3 is a disc type, which can cut and mix bubbles and is not easy to be blocked.

[0022] The quick separation component 4 is located on the inner side of the housing 1, and the quick separation component 4 includes a first mixing cylinder 401, a second mixing cylinder 402, a guide plate 403 and a coalescing filler 404, and the first mixing cylinder 401 is fixed to the upper end of the mixing cutter 3, and the upper end of the first mixing cylinder 401 is bolted to the second mixing cylinder 402. Because the diameter of the first mixing cylinder 401 is smaller than the diameter of the second mixing cylinder 402, the width of the oily sewage flow area is different. When the oily sewage is in a narrow area, the bubbles and oil droplets can collide and adsorb quickly, and when passing through a loose area, the flow rate is slow, which can separate the oil droplets and the clean water into two layers, thereby facilitating the separation. The second mixing cylinder 402 has a plurality of through holes 421 equidistantly arranged at the bottom thereof, which can deliver the uppermost layer of oil into the oil cylinder 5 to avoid blockage at the top. A guide plate 403 is welded at the upper end of the first mixing cylinder 401, and an arc plate 8 is fixed at the upper end of the second mixing cylinder 402. Both the guide plate 403 and the arc plate 8 are annular weir guide plates, which can reduce the oil phase carrying effect of the water phase over the weir plate and prevent the oil content at the water outlet from fluctuating. A coalescing filler 404 is arranged on the outer side of the second mixing cylinder 402. The coalescing filler 404 can coalesce the oil droplets in the water phase into large oil droplets, which is beneficial to separation and has a certain defoaming effect.

[0023] An oil cylinder 5 is provided at the center of the inner side of the first mixing cylinder 401 for collecting oil droplets to prevent the oil droplets from flowing back into the housing 1. The secondary separation component 6 is located on the left side of the first mixing cylinder 401. The secondary separation component 6 includes a water pipe 601, a circulating water pump 602 and a gas-liquid mixer 603. The left side of the housing 1 is penetrated by the water pipe 601. Because the upper end of the water pipe 601 is located on the outside of the first mixing cylinder 401, and the lower end of the water pipe 601 is located on the outside of the second mixing cylinder 402, the upper end buffer area is filled with water through the water pipe 601. The semi-dirty clean water that has been precipitated is pumped to the outside of the second mixing cylinder 602 for rapid cyclone separation, and a circulating water pump 602 is fixed to the upper end of the water pipe 601, and a gas-liquid mixer 603 is arranged below the circulating water pump 602 to inject air into the semi-dirty clean water again, and cause the internal oil droplets to collide and adsorb with the bubbles again, which can increase the amount of bubbles and avoid the limited adsorption capacity of the bubbles. The large amount of oil in the oily wastewater is not adsorbed, thereby avoiding the incomplete separation of water and oil, which is beneficial to improving the separation quality.

[0024] In summary, when this compact cyclone flotation device suitable for offshore platforms is used, first, the oily sewage enters the housing 1 through the water inlet 2, the mixing cutter 3 is started, and the mixing cutter 3 rotates quickly to cut and mix the bubbles, and then the oily sewage swirls upward along the first mixing cylinder 401. During the swirl process, the oily sewage is adsorbed by the bubbles and moves to the uppermost layer, and then passes through the through hole 421 from the guide plate 403 into the inner side of the oil cylinder 5, and the remaining large amount of oily sewage moves upward to the outer side of the second mixing cylinder 402 under the influence of centrifugal force. At this time, due to the swirl area The oily sewage in the upper layer contacts the coalescing filler 404, causing the oil droplets in the water to coalesce into large oil droplets, which then pass through the arc plate 8 and enter the inner side of the oil cylinder 5. Then, the incompletely separated oily sewage on the outer side of the second mixing cylinder 402 is pumped out through the circulating water pump 602, along the water pipe 601 and into the inner side of the gas-liquid mixer 603, so that the incompletely separated oily sewage is mixed with the new gas and then re-enters the outer side of the first mixing cylinder 401, and then is separated again, thereby improving the separation quality. The separated clean water flows out from the drain port 7.

Claims

1. A compact cyclone flotation device suitable for an offshore platform, comprising a housing (1), a rapid separation component (4) and a secondary separation component (6), characterized in that: A mixing cutter (3) is arranged on the inner side of the housing (1), and the quick separation assembly (4) is located on the inner side of the housing (1), and the quick separation assembly (4) comprises a first mixing cylinder (401), a second mixing cylinder (402), a guide plate (403) and an agglomeration filler (404), and the first mixing cylinder (401) is fixed to the upper end of the mixing cutter (3), and the second mixing cylinder (402) is bolted to the upper end of the first mixing cylinder (401), and the guide plate is welded to the upper end of the first mixing cylinder (401). (403), and the agglomerating filler (404) is arranged on the outer side of the second mixing cylinder (402), the secondary separation component (6) is located on the left side of the first mixing cylinder (401), and the secondary separation component (6) includes a water pipe (601), a circulating water pump (602) and a gas-liquid mixer (603), the water pipe (601) is penetrated on the left side of the shell (1), and the circulating water pump (602) is fixed to the upper end of the water pipe (601), and the gas-liquid mixer (603) is arranged below the circulating water pump (602).

2. A compact cyclone flotation device suitable for offshore platforms according to claim 1, characterized in that: A water inlet (2) is provided through the right end of the mixing cutter (3), and the blade of the mixing cutter (3) is disc-type.

3. A compact cyclone flotation device suitable for offshore platforms according to claim 1, characterized in that: The bottom of the second mixing cylinder (402) is provided with a plurality of groups of through holes (421) at equal intervals, and the diameter of the first mixing cylinder (401) is smaller than the diameter of the second mixing cylinder (402).

4. A compact cyclone flotation device suitable for offshore platforms according to claim 3, characterized in that: An arc-shaped plate (8) is fixed to the upper end of the second mixing cylinder (402), and an oil cylinder (5) is arranged at the center of the inner side of the first mixing cylinder (401).

5. A compact cyclone flotation device suitable for offshore platforms according to claim 4, characterized in that: The upper end of the water pipe (601) is located outside the first mixing cylinder (401), and the lower end of the water pipe (601) is located outside the second mixing cylinder (402).

6. A compact cyclone flotation device suitable for offshore platforms according to claim 5, characterized in that: A drain port (7) is provided on the right side of the outer shell (1), and both ends of the drain port (7) and the water pipe (601) are tangent to the outer shell (1).

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