Horizontal air flotation coalescence degassing and oil removal separation device

Abstract

The utility model relates to the technical field of oil removal and separation devices, in particular to a horizontal air flotation coalescence degassing oil removal and separation device which comprises a separator, a gas-liquid mixer is arranged on the outer side of the separator, the gas inlet end of the gas-liquid mixer is connected with a material gas inlet pipe, the gas outlet end of the gas-liquid mixer is connected with a feeding inlet pipe, and the feeding inlet pipe is arranged in the separator; the gas mixer is adopted for mixing materials to generate bubbles, then rotational flow is formed, oil stain molecules are attached to the surfaces of the bubbles more easily and float upwards quickly, the retention time is shortened, the production efficiency is high, the treatment capacity is large, meanwhile, the air flotation generation unit is compact in structure, needed equipment is small, and occupied space is small. Bubble media capable of enabling oil stain molecules to be attached are generated in the air floatation generation unit.

Description

Technical Field

[0001] This utility model relates to the technical field of oil removal and separation devices, and in particular to a horizontal air flotation coalescence degassing and oil removal separation device. Background Technology

[0002] In many industrial sectors such as oil extraction, refining, chemical processing, and metal processing, a large amount of oily wastewater is generated during the production process. With increasingly stringent environmental protection requirements and the continuous expansion of industrial production scale, higher demands are placed on the efficiency, stability, and economy of oily wastewater treatment technology. Therefore, oil separation devices are needed to separate and purify the wastewater.

[0003] Existing traditional horizontal coalescing degassing and oil removal tanks mainly rely on inlet dispersion devices, water-oil baffles, coalescing units, orifice plates or weir plates, etc., to remove oil and degas through a certain residence time. This results in low oil separation efficiency, incomplete oil removal, high oil content in the effluent, large device size, and large space occupation. In particular, it fails to meet the design requirements for working conditions with high inlet oil density and high requirements for effluent oil content.

[0004] Therefore, in response to the problems of low oil separation efficiency, incomplete oil removal, high oil content in effluent, large device size, and large space occupation caused by the traditional horizontal coalescence degassing and oil removal tank, a horizontal air flotation coalescence degassing and oil removal separation device can be designed. Utility Model Content

[0005] In order to overcome the problems of traditional horizontal coalescing degassing and oil removal tanks, which result in low oil separation efficiency, incomplete oil removal, high oil content in effluent, large device size, and large space occupation.

[0006] The technical solution of this utility model is as follows: a horizontal air flotation coalescence degassing and oil removal separation device, including a separator; a gas-liquid mixer is provided on the outside of the separator, the air inlet end of the gas-liquid mixer is connected to a material gas inlet pipe, the air outlet end of the gas-liquid mixer is connected to a feed inlet pipe, and the feed inlet pipe is located inside the separator.

[0007] Preferably, gas is introduced into the material gas inlet pipe, and the gas-liquid mixer uniformly mixes the gas to form microbubbles. The gas-liquid mixer is either a static mixer or a dynamic mixer, and is installed outside or inside the tank.

[0008] Preferably, the gas-liquid mixer has a mixing material inlet at the feed end and a gas phase outlet at the side of the gas-liquid mixer or at the upstream mixing pipe.

[0009] Preferably, an aqueous phase outlet is installed on one side of the liquid outlet end of the separator, and an oil phase outlet is installed on the other side of the liquid outlet end of the separator.

[0010] Preferably, the separator is equipped with an air flotation unit inside, and the outlet end of the air flotation unit is symmetrically connected with a distribution branch pipe.

[0011] Preferably, the top of the air flotation unit is provided with a perforated plate, and the bottom of the air flotation unit is connected to a slag discharge port.

[0012] Preferably, the separator is equipped with a water-oil baffle, which can be replaced with a water-oil weir plate.

[0013] Preferably, the gas-liquid mixer is a static mixer or a dynamic mixer, and is installed inside the separator.

[0014] The beneficial effects of this invention are as follows: By using a gas mixer to mix materials and generate bubbles, which then form a vortex, oil molecules can more easily adhere to the surface of the bubbles and float up quickly, reducing residence time and resulting in high production efficiency and large processing capacity. At the same time, the air flotation unit has a compact structure, requires small equipment, and occupies little space. Because the air flotation unit can generate bubble media that allows oil molecules to adhere, it can process water containing heavy oil or water with low oil content. Considering the overall performance of this equipment, it can process water containing both high and low oil content materials, and the purity after separation can reach the ppm level. Attached Figure Description

[0015] Figure 1 The diagram shown is a second structural schematic of the horizontal air flotation coalescence degassing and oil removal separation device of this utility model.

[0016] Figure 2 The diagram shown is a top view of the horizontal air flotation coalescence degassing and oil separation device of this utility model.

[0017] Figure 3 The diagram shown is a top view of the multi-stage air flotation unit in the horizontal air flotation coalescence degassing and oil separation device of this utility model.

[0018] Figure 4 The diagram shown is a schematic diagram of the arrangement of the air flotation unit in the horizontal air flotation coalescence degassing and oil separation device of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Separator; 201. Gas-liquid mixer; 202. Material gas inlet pipe; 203. Feed inlet pipe; 204. Mixed material inlet; 205. Gas phase outlet; 206. Aqueous phase outlet; 207. Oil phase outlet; 208. Slag discharge port; 301. Air flotation generating unit; 302. Distribution branch pipe; 303. Perforated plate; 304. Water-oil baffle. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment of a horizontal air flotation coalescence degassing and oil removal separation device, which includes a separator 1; a gas-liquid mixer 201 is provided on the outside of the separator 1, the air inlet end of the gas-liquid mixer 201 is connected to a material gas inlet pipe 202, the air outlet end of the gas-liquid mixer 201 is connected to a feed inlet pipe 203, and the feed inlet pipe 203 is located inside the separator 1.

[0022] Please see Figures 2-4 In this embodiment, the gas-liquid mixer 201 is provided with a mixed material inlet 204 at the feed end, and a gas phase outlet 205 is provided on the side of the gas-liquid mixer 201 or at the upstream mixing pipe; a water phase outlet 206 is installed on one side of the liquid outlet end of the separator 1, and an oil phase outlet 207 is installed on the other side of the liquid outlet end of the separator 1. The oil phase and water phase are separated after the swirling is eliminated. The oil phase moves upward along the axial direction, and the water phase moves radially to the outside of the cone. When it reaches the outside of the cone, the water phase moves downward along the outer wall of the cone due to gravity, and finally converges and is discharged from the water phase outlet 206. The oil phase, due to its low density, accumulates at the top and flips over the water-oil baffle to the other side and is discharged from the oil phase outlet 207.

[0023] Please see Figures 3-4 In this embodiment, the separator 1 is equipped with an air flotation generating unit 301. The outlet end of the air flotation generating unit 301 is symmetrically connected to a distribution branch pipe 302. The top of the air flotation generating unit (301) is provided with a perforated plate 303, and the bottom of the air flotation generating unit 301 is connected to a slag discharge port 208. The separator 1 is equipped with a water-oil baffle 304, which can be replaced with a water-oil weir plate. When the height of the accumulated oil layer exceeds the water-oil baffle 304, it will flip over the baffle and be discharged from the oil phase outlet 207 after accumulation. The remaining gas phase is discharged from the gas phase outlet 205.

[0024] During operation, before the oily water to be treated enters the flotation unit 301, gas is introduced into the gas inlet pipe 202. The gas-liquid mixer 201 uniformly mixes the water to form microbubbles. The gas-liquid mixer 201 can be a static or dynamic mixer, located outside or inside the tank. After mixing, the water enters the flotation unit 301 and flows through evenly distributed branch pipes 302, swirling along the inner cylinder tangentially, forming a mixture that swirls upwards from the bottom of the flotation unit 301. Oil adhering to the bubbles can quickly rise to the surface. The flotation separation process has low residence time requirements. Upon reaching the top of the cone, a vortex elimination device is installed, and the oil and water phases are separated after the vortex is eliminated. The oil phase moves upward along the axial direction, while the water phase moves radially outward from the cone. When it reaches the outside of the cone, the water phase moves downward along the outer wall of the cone due to gravity and finally converges and is discharged from the water phase outlet 206. Due to its lower density, the oil phase accumulates at the top. When the height of the accumulated oil layer exceeds the water-oil baffle 304, it will flip over the baffle and be discharged from the oil phase outlet 207 after accumulation. The remaining gas phase is discharged from the gas outlet 205.

[0025] Through the above steps, the gas-liquid mixer 201 mixes the materials to generate bubbles, which then form a vortex, making it easier for oil molecules to adhere to the bubble surface and float quickly, reducing residence time and resulting in high production efficiency and large processing capacity. At the same time, the air flotation generating unit 301 has a compact structure, requires small equipment, and occupies little space. Because the air flotation generating unit 301 generates a bubble medium that allows oil molecules to adhere, it can treat materials containing heavy oil or materials with low oil content. Considering the overall performance of this equipment, it solves the problems of low oil separation efficiency, incomplete oil removal, high oil content in effluent, large device size, and large space occupation caused by traditional horizontal coalescence degassing and oil removal tanks.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A horizontal air flotation coalescence degassing and oil separation device, comprising a separator (1); characterized in that: A gas-liquid mixer (201) is provided on the outside of the separator (1). The gas inlet end of the gas-liquid mixer (201) is connected to a material gas inlet pipe (202), and the gas outlet end of the gas-liquid mixer (201) is connected to a feed inlet pipe (203). The feed inlet pipe (203) is located inside the separator (1).

2. The horizontal air flotation coalescence degassing and oil separation device according to claim 1, characterized in that: The gas-liquid mixer (201) is provided with a mixed material inlet (204) at the feed end, and a gas phase outlet (205) is provided on the side of the gas-liquid mixer (201) or at the upstream mixing pipe.

3. The horizontal air flotation coalescence degassing and oil separation device according to claim 1, characterized in that: A water phase outlet (206) is installed on one side of the liquid outlet end of the separator (1), and an oil phase outlet (207) is installed on the other side of the liquid outlet end of the separator (1).

4. The horizontal air flotation coalescence degassing and oil separation device according to claim 1, characterized in that: The separator (1) is equipped with an air flotation generating unit (301), and the outlet end of the air flotation generating unit (301) is symmetrically connected with a distribution branch pipe (302).

5. The horizontal air flotation coalescence degassing and oil separation device according to claim 4, characterized in that: The top of the air flotation generating unit (301) is provided with a perforated plate (303), and the bottom of the air flotation generating unit (301) is connected to a slag discharge port (208).

6. The horizontal air flotation coalescence degassing and oil separation device according to claim 1, characterized in that: The separator (1) is equipped with a water-oil baffle (304).

7. The horizontal air flotation coalescence degassing and oil separation device according to claim 1, characterized in that: The gas-liquid mixer (201) is a static mixer or a dynamic mixer, and is installed inside the separator (1).

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