Multi-phase mixing equipment and multi-phase mixing equipment group

Abstract

The utility model discloses multiphase mixing equipment and a multiphase mixing equipment group. The multi-phase mixing equipment comprises a cylinder, a gas inlet is formed in the upper end of the cylinder, and a mixed outlet is formed in the lower end of the cylinder; the oil-water mixture inlet is tangentially connected to the middle upper part of the cylinder and is also communicated with the medicament inlet; a gas acceleration cone is arranged on the upper portion in the cylinder, a contraction cone is arranged below the gas acceleration cone at a certain distance, and the bottom end of the contraction cone is connected with a diffusion cone through a throat pipe. The multi-phase mixing equipment disclosed by the utility model can be used for uniformly mixing gas, a water treatment agent and an oil-water mixture, and is simple in structure and convenient to mount.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil-containing wastewater treatment technical field, especially a kind of multiphase mixing equipment and multiphase mixing equipment group. BACKGROUND

[0002] With the sustained development of offshore oilfield, produced fluid water cut rises year by year, resulting in production water treatment scale is larger and larger. Dissolved air flotation is a kind of commonly used water treatment technology on offshore platform, by the water after dissolved air flotation treatment, part of pressurized dissolved air is backflow to dissolved air flotation inlet, flows into air flotation tank body, pressure reduces, gas decompression releases and produces fine bubbles in water. At the same time, add water treatment agent in oily sewage, agent flocculation is captured, wrapped, bridged to capture and adhere oil droplets and bubbles, form air-entraining flocculation, its apparent density is far less than water, so air-entraining flocculation is quickly floated to the surface and scraped off by scraper, so as to realize oil-water separation.

[0003] But dissolved air flotation and supporting equipment have the disadvantages of large floor area and large amount of agent, and part of backflow water is always circulating in air flotation system, which not only increases equipment energy consumption, but also reduces the actual treatment capacity of air flotation equipment. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to solve above-mentioned technical problem, provide a kind of multiphase mixing equipment and multiphase mixing equipment group, it can complete the dissolution of high-pressure gas and the generation of fine bubble, simultaneously realize water treatment agent, bubble and oily sewage are uniformly mixed, oily sewage is pretreated, can significantly enhance the effect of air flotation oil removal, reduce the size of air flotation equipment and the amount of agent, optimize air flotation selection dissolved air flow process.

[0005] Firstly, the utility model provides a kind of multiphase mixing equipment, which is realized by the following technical solutions.

[0006] A kind of multiphase mixing equipment, including cylinder, gas inlet is equipped in the upper end of the cylinder, and mixing outlet is equipped in the lower end of the cylinder;Oil-water mixture inlet is tangentially connected in the upper middle part of the cylinder, and the oil-water mixture inlet is also communicated with the agent inlet;Gas acceleration cone is equipped in the upper part in the cylinder, and contraction cone is equipped at the lower part of gas acceleration cone with a certain distance interval, and the bottom end of contraction cone is connected with diffusion cone through throat pipe.

[0007] Further, the top of the cylinder is provided with a cover plate, and the cover plate is connected with the gas inlet.

[0008] Further, the bottom of the cylinder is provided with a bottom plate, and the bottom plate is connected with the mixing outlet.

[0009] Further, the upper and lower ends of the cylinder are provided with flanges, and the flanges are connected with the cover plate and the bottom plate by connecting pieces.

[0010] Further, the center line of the oil-water mixture inlet is perpendicular to the center line of the cylinder; and the medicament inlet is located on a connecting pipe of the oil-water mixture inlet.

[0011] Further, the top end of the gas accelerating cone is flush with the top end of the cylinder, and the lower end of the gas accelerating cone is located above the connecting point of the oil-water mixture inlet and the cylinder; the upper end of the gas accelerating cone has a larger diameter than the lower end.

[0012] Further, the upper end of the converging cone is located below the connecting point of the oil-water mixture inlet and the cylinder; and the upper end of the converging cone has a larger diameter than the lower end.

[0013] Further, the bottom end of the diffusing cone is flush with the bottom end of the cylinder; and the upper end of the diffusing cone has a smaller diameter than the lower end.

[0014] In a second aspect, the utility model provides a multi-phase mixing equipment group, which is achieved by adopting the following technical scheme.

[0015] The multi-phase mixing equipment group comprises a plurality of the above multi-phase mixing equipment connected in series or in parallel.

[0016] The application has the following beneficial effects.

[0017] (1) The utility model integrates gas dissolving and medicament flocculation, simultaneously enhances the coupling effect of water treatment medicament and bubbles, can make oil-containing sewage fully perform high-pressure gas dissolving and fine bubble generation, medicament molecule stretching and efficiency improvement, air entraining flocculation body generation and the like before entering the air flotation box, saves the reflux booster pump, gas dissolving tank and the like of the air dissolving type air flotation supporting equipment and the water treatment medicament consumption, effectively reduces the investment and operation cost of the air dissolving type air flotation equipment.

[0018] (2) The utility model is provided with standard flanges on the inlet and outlet pipelines and the cylinder body, facilitates quick connection and installation, and has compact structure and small floor area. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structural schematic view of the utility model;

[0020] Fig. 2 is a sectional view of the utility model along the line A-A'.

[0021] 1. gas inlet, 2. cover plate, 3. gas accelerating cone, 4. cylinder, 5. converging cone, 6. throat pipe, 7. bottom plate, 8. mixing outlet, 9. medicament inlet, 10. oil-water mixture inlet, 11. diffusing cone, 12. flange, 13. connecting piece, Ⅰ. gas accelerating zone, Ⅱ. gas-liquid collection zone, Ⅲ. accelerating zone, Ⅳ. diffusing zone. DETAILED DESCRIPTION

[0022] The present patent application will be further described below with reference to the embodiments.

[0023] like Figs. 1-2 As shown, a multiphase mixing device includes a cylinder 4 with internal components, and flanges 12 are welded to both the upper and lower ends of the cylinder 4.

[0024] A cover plate 2 is provided at the upper end of the cylinder 4, and a bottom plate 7 is provided at the lower end of the cylinder 4. The cover plate 2 and the bottom plate 7 are respectively connected to the flange 12 by a connector 13. The purpose is to facilitate the opening of the bottom plate 7 or the cover plate 2 by disassembling the connector 13, so as to install or inspect the internal components.

[0025] The cover plate 2 is connected to a gas inlet 1, and the bottom plate 7 is connected to a mixing outlet 8. Specifically, the gas inlet 1 is welded to the cover plate 2 and is located at the center of the cover plate 2; the mixing outlet 8 is welded to the bottom plate 7 and is located below the bottom plate 7 to ensure that the gas-liquid mixture can be discharged from the mixing outlet 8.

[0026] The oil-water mixture inlet 10 is tangentially connected to the cylinder 4, with the connection point located in the upper middle part of the cylinder 4. The centerline of the oil-water mixture inlet 10 is perpendicular to the centerline of the cylinder 4. The oil-water mixture inlet 10 is also connected to the reagent inlet 9, which is located on the connecting pipe of the oil-water mixture inlet 10, ensuring that the oil-water mixture is collected with the water treatment reagent before entering the gas-liquid collection zone II.

[0027] Inside the cylinder 4, from top to bottom, there are a gas acceleration cone 3, a contraction cone 5, a throat 6, and a diffusion cone 11. The top of the gas acceleration cone 3 is flush with the top of the cylinder 4. The lower end of the gas acceleration cone 3 is close to the gas-liquid collection area II and is located above the connection point between the pipe of the oil-water mixture inlet 10 and the cylinder 4. The upper diameter of the gas acceleration cone 3 is larger than the lower diameter. The purpose is to accelerate the gas to form a gas core inside the cylinder 4, thereby increasing the mass transfer with the oil-water mixture.

[0028] The contraction cone 5 is located one distance below the gas acceleration cone 3. The upper end of the contraction cone 5 is located below the interface between the inlet pipe of the oil-water mixture inlet 10 and the cylinder 4. The upper end of the contraction cone 5 is connected to the cylinder 4, and the lower end of the contraction cone 5 is connected to the throat 6. The diameter of the upper end of the contraction cone 5 is larger than that of the lower end. The purpose is to collect the oil-gas-water mixture, gradually accelerate it during the flow, reduce the swirling radius, and enhance the swirling intensity.

[0029] The upper and lower ends of the throat pipe 6 are connected with the contraction cone 5 and the diffusion cone 11 respectively.

[0030] The lower end of the diffusion cone 11 is connected with the bottom of the cylinder 4 in a flush manner.

[0031] In some embodiments, the multiphase mixing device can be connected in series or in parallel in multiple stages to adapt to different processing occasions and processing capacities.

[0032] The working principle of the utility model is as follows:

[0033] The oil-water mixture with a certain pressure is tangentially introduced into the cylinder 4 through the oil-water mixture inlet 10 on the side of the cylinder 4, and after being mixed with the water treatment agent introduced through the agent inlet 9, the mixture enters the gas-liquid collection area II to form a cyclone. After the gas is introduced into the device through the gas inlet 1 at the top at a high pressure, the gas is accelerated through the gas accelerating cone 3 and then forms a gas core in the gas-liquid collection area II. Under the radial shear effect of the cyclone, on the one hand, the water treatment agent is stretched and activated under the action of the cyclone, and at the same time, the oil droplets are captured to form a drug-oil droplet adhesion body; on the other hand, the gas core and the contact surface of the cyclone exchange mass, and the high-pressure gas is gradually dissolved in the oil-water mixture. When the oil-water mixture passes through the contraction cone 5 and enters the acceleration area III, the radius of the throat pipe 6 is significantly reduced, the cyclone intensity is increased, and the stretching and activation effect of the water treatment agent is enhanced. At the same time, due to the reduction of the flow space, the capture effect of the water treatment agent on the oil droplets is enhanced. After entering the diffusion area IV, the pressure of the oil-water mixture is reduced, and part of the dissolved gas is gradually separated in the form of a small bubble inside the drug-oil droplet adhesion body. After several stages of mixing and gas dissolution, the oil-containing sewage, the agent flocculation body and the dissolved gas are discharged through the mixing outlet 8, so as to realize the pretreatment of the oil-containing sewage.

[0034] The embodiments of the specific embodiment are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A multiphase mixing device comprising a cylinder (4), characterised in that: A gas inlet (1) is arranged at the upper end of the cylinder (4), and a mixing outlet (8) is arranged at the lower end of the cylinder (4); an oil-water mixture inlet (10) is tangentially connected to the middle upper part of the cylinder (4), and the oil-water mixture inlet (10) is also in communication with a medicament inlet (9); a gas accelerating cone (3) is arranged in the upper part of the cylinder (4), and a contraction cone (5) is arranged below the gas accelerating cone (3) with a certain distance, and the bottom end of the contraction cone (5) is connected to a diffusion cone (11) through a throat (6).

2. A multiphase mixing device according to claim 1, wherein: A cover plate (2) is arranged at the top of the cylinder (4), and the cover plate (2) is connected with the gas inlet (1).

3. A multiphase mixing device according to claim 1, wherein: A bottom plate (7) is arranged at the bottom of the cylinder (4), and the bottom plate (7) is connected with the mixing outlet (8).

4. A multiphase mixing device according to claim 1, wherein: Flanges (12) are arranged at the upper and lower ends of the cylinder (4), and the flanges (12) are connected with the cover plate (2) and the bottom plate (7) by using connecting pieces (13).

5. A multiphase mixing device according to claim 1, wherein: The center line of the oil-water mixture inlet (10) is perpendicular to the center line of the cylinder (4); and the medicament inlet (9) is arranged on the connecting pipe of the oil-water mixture inlet (10).

6. A multiphase mixing device according to claim 1, wherein: The top end of the gas accelerating cone (3) is flush with the top end of the cylinder (4), and the lower end of the gas accelerating cone (3) is located above the connecting point of the oil-water mixture inlet (10) and the cylinder (4); and the diameter of the upper end of the gas accelerating cone (3) is larger than that of the lower end.

7. A multiphase mixing device according to claim 1, wherein: The upper end of the contraction cone (5) is located below the connecting point of the oil-water mixture inlet (10) and the cylinder (4); and the diameter of the upper end of the contraction cone (5) is larger than that of the lower end.

8. A multiphase mixing device according to claim 1, wherein: The bottom end of the diffusion cone (11) is flush with the bottom end of the cylinder (4); and the diameter of the upper end of the diffusion cone (11) is smaller than that of the lower end.

9. A set of multiphase mixing devices, characterized in that: The multi-phase mixing device of any one of claims 1-8 in series or in parallel. The multi-phase mixing device of any one of claims 1-8 in series or in parallel.

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