Oil-water separation device for industrial wastewater

Abstract

The utility model relates to an oil-water separation device for industrial wastewater, and relates to the field of environmental protection engineering. The industrial wastewater treatment device comprises a separation tank, a filter assembly mounted in the separation tank and used for removing solid impurities in industrial wastewater, an oil-water separation assembly used for separating water and oil in the industrial wastewater, and an air flotation assembly used for assisting the oil-water separation assembly. The device can integrate three technical means of filtration, oil-water separation and air floatation, so that the integrated treatment of the oil-containing industrial wastewater is realized, the treatment flow is simplified, and the device has the remarkable advantages of improving the treatment efficiency and optimizing the oil-water separation effect at the same time.

Description

Technical Field

[0001] This application relates to the field of environmental protection engineering, and particularly to an oil-water separation device for industrial wastewater. Background Art

[0002] In modern industrial production, especially in industries such as petroleum, chemical, steel, coking, household appliances, machinery manufacturing, and food processing, the generation of a large amount of oily wastewater has become an increasingly prominent problem. This type of wastewater contains a large amount of oil. If directly discharged into the environment without proper treatment, it will cause serious pollution to the soil, water body, and ecological environment. Oil pollution not only damages the natural landscape but may also lead to a decline in soil quality, water eutrophication, and the death of aquatic organisms, thus having a long-term adverse impact on the entire ecosystem.

[0003] To solve this problem, existing traditional oil-water separation technologies usually require auxiliary complex demulsification processes, such as adding chemical flocculants for flocculation sedimentation or using methods such as electrolysis. However, these methods exhibit some significant disadvantages in practical applications. First, the operation procedures are quite cumbersome and require professional technicians for operation, increasing the operating costs and time costs of enterprises. Second, due to the need to add various chemical substances, not only does it increase the treatment cost, but it may also cause secondary pollution to the environment and ecology. Moreover, these traditional methods have high energy consumption and unsatisfactory treatment efficiency, resulting in an increase in overall costs and affecting the economic benefits of enterprises.

[0004] In addition to the above-mentioned chemical and physical methods, some studies have also attempted to use biological methods to treat oily wastewater. However, biological methods usually require longer treatment times and more complex operation management, and the treatment effect is affected by various environmental and operating conditions, so they are not widely used in practical applications.

[0005] In summary, existing oily wastewater treatment technologies have problems such as complex operation, high cost, low treatment efficiency, and potential environmental pollution risks. Based on this situation, there is an urgent need to provide an oil-water separation device for industrial wastewater with high treatment efficiency and good separation effect to better meet the needs of environmental protection and sustainable development. Utility Model Content

[0006] In order to improve the treatment efficiency while optimizing the oil-water separation effect, this application provides an oil-water separation device for industrial wastewater.

[0007] An oil-water separation device for industrial wastewater provided by this application adopts the following technical solutions:

[0008] An oil-water separation device for industrial wastewater, comprising a separation tank and a filtration component installed inside the separation tank for removing solid impurities in industrial wastewater, an oil-water separation component for separating water and oil in industrial wastewater, and a flotation component for assisting the oil-water separation component.

[0009] By adopting the above technical solution, after the industrial wastewater enters the separation tank, it will first pass through the filtration component, which can effectively remove particulate matter in the industrial wastewater. Secondly, the industrial wastewater will pass through the oil-water separation component, where effective separation of the oil phase and the water phase can be achieved. During the separation process, the flotation component can produce the effect of microbubbles adhering to the oil droplets in the oil phase, thereby assisting the oil-water separation component in performing oil-water separation treatment. Therefore, the device of the present application can integrate three technical means of filtration, oil-water separation, and flotation, thereby realizing the integrated treatment of oily industrial wastewater, simplifying the treatment process, improving the treatment efficiency, and optimizing the oil-water separation effect at the same time.

[0010] Optionally, the filtration component includes a water inlet, a filtration part, and a water outlet, and the filtration part is arranged between the water inlet and the water outlet.

[0011] By adopting the above technical solution, the filtration component can preliminarily purify the wastewater. After the industrial wastewater enters from the water inlet, the large particulate solid impurities in the water will be filtered out by the filtration part, protecting the subsequent treatment units from being blocked or worn, ensuring the long-term stable operation of the treatment units, providing good conditions for the subsequent oil-water separation, and improving the efficiency and service life of the oil-water separation device.

[0012] Optionally, the filtration part includes a plurality of filter meshes arranged in the water flow direction and successively from front to back, with the mesh diameters decreasing in sequence.

[0013] By adopting the above technical solution, the industrial wastewater will flow through a plurality of filter meshes with decreasing mesh diameters in sequence, thereby realizing multi-stage filtration treatment. In actual use, in order to adapt to different filtration requirements, different filtration effects can be achieved by adjusting the number of filter meshes. When the number of filter meshes decreases, the filtration efficiency may decrease slightly, but the treatment speed will increase; when the number of filter meshes increases, finer solid impurities in the industrial wastewater can be further removed, improving the filtration quality.

[0014] Optionally, the oil-water separation component includes an oil-phase separation plate and a water-phase diversion plate located below the oil-phase separation plate.

[0015] Optionally, the top of the water-phase diversion is higher than the bottom of the oil-phase separation plate.

[0016] Optionally, there are two groups of corresponding oil-phase separation plates, which are respectively arranged on both sides of the water-phase diversion plate.

[0017] By adopting the above technical solution, the oil-phase separator plate and the water-phase drainage plate located below the oil-phase separator plate can form a specific flow channel, enabling the oil-water mixture to achieve natural stratification when flowing through. This characteristic benefits from the specific flow channel design, which promotes the natural separation of the oil phase and the water phase, thereby enhancing the oil-water separation effect. Utilizing the principle of natural stratification, efficient oil-water separation can be achieved without additional energy consumption, optimizing the oil-water separation effect on the premise of reducing the treatment cost and improving the treatment efficiency.

[0018] Optionally, the oil-phase separator plate is composed of several corrugated sheets for adsorbing oil.

[0019] By adopting the above technical solution, the setting of the corrugated sheets not only increases the contact area with the oil-water mixture but also enhances the adsorption capacity of the separator plate for oil. This structure provides more attachment points for oil droplets by increasing the contact area, thereby effectively improving the removal efficiency of oil droplets and further optimizing the oil-water separation effect of this application.

[0020] Optionally, the air flotation assembly includes a bubble generator and a ventilation port. The bubble generator is installed at the bottom of the separation tank and is used to generate microbubbles, and the ventilation port is opened at the top of the separation tank.

[0021] By adopting the above technical solution, the bubble generator generates microbubbles to carry the oil droplets upward, and the ventilation port is used to ensure the stability of the water pressure and air pressure in the separation tank. Through this combined design, the oil-water separation effect is further strengthened, ensuring that the oil can be completely removed from the wastewater.

[0022] Optionally, the bubble generator adopts a Venturi tube structure to facilitate the generation of microbubbles by compressed air.

[0023] By adopting the above technical solution, the Venturi tube structure physically enhances the floating effect of the oil droplets, making the separation process faster and more thorough and reducing the residual amount of oil in the wastewater.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Through a unique structural design, integrating various technical means such as filtration, oil-water separation, and air flotation, the integrated and efficient treatment of oily industrial wastewater is achieved, simplifying the traditional wastewater treatment process and reducing the operation difficulty.

[0026] 2. By setting up the filtration component, solid impurities in the wastewater can be effectively removed, providing good conditions for subsequent treatment and increasing the service life of the overall device.

[0027] 3. Through the specific structural design of the oil-water separation component, the contact area is increased and the adsorption effect of the separation plate on oil is enhanced. Under multiple effects, the oil-water separation effect is significantly improved;

[0028] 4. The combined use of the oil-water separation component and the air flotation component significantly enhances the oil-water separation effect and further improves the thoroughness and efficiency of wastewater treatment. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of an embodiment of the present application;

[0030] Figure 2 is Figure 1 a partial enlarged view of part A in

[0031] Figure 3 is a schematic diagram of the water flow direction of the present application.

[0032] Description of the reference numerals: 1, separation tank; 11, water phase outlet; 2, filtration component; 21, water inlet; 22, filtration part; 221, filter mesh; 23, water outlet; 3, oil-water separation component; 31, oil phase separation plate; 311, corrugated sheet; 32, water phase diversion plate; 4, air flotation component; 41, bubble generator; 42, ventilation port. Detailed Embodiments

[0033] The following will Figures 1-3 further describe the present application in detail with reference to the attached

[0034] An embodiment of the present application discloses an oil-water separation device for industrial wastewater.

[0035] Referring to Figures 1-2 , an oil-water separation device for industrial wastewater includes a separation tank 1. Inside the separation tank 1, a filtration component 2, an oil-water separation component 3, and an air flotation component 4 are arranged. The filtration component 2 includes a water inlet 21 opened on the side wall of the separation tank 1, a filtration part 22 communicated with the water inlet 21, and a filtration part 22 connected to the filtration part 22. The filtration part 22 is arranged between the water inlet 21 and the water outlet 23. The oily industrial wastewater enters the filtration part 22 from the water inlet 21, is filtered by the filtration part 22, and after removing large particle solid impurities, it flows out from the water outlet 23 and flows to the oil-water separation component 3.

[0036] The filtering part 22 includes a filter screen 221 arranged in the water flow direction and successively from top to bottom. The mesh diameter of the filter screen 221 decreases successively according to the height order, so as to realize multi-stage filtering treatment. In actual use, in order to adapt to different filtering requirements, different filtering effects can be achieved by adjusting the number of the filter screens 221. When the number of the filter screens 221 decreases, the filtering efficiency may decrease slightly, but the processing speed will increase; when the number of the filter screens 221 increases, finer solid impurities in the industrial wastewater can be further removed, and the filtering quality can be improved. In the specific implementation manner of this application, there are four filter screens 221 in total, but the number of the filter screens 221 can also be increased or decreased according to different water qualities.

[0037] The oil-water separation component 3 is arranged on the side of the filtering component 2 away from the water inlet 21, and includes two relatively arranged oil-phase separation plates 31 and a water-phase diversion plate 32 located below the oil-phase separation plates 31. The water-phase diversion plate 32 is located in the middle position between the two oil-phase separation plates 31, and the vertical height of the top of the water-phase separation plate is higher than the vertical height of the bottom of the oil-phase separation plate 31, forming a specific flow channel, so that the oil-water mixture realizes natural stratification when flowing through. This characteristic benefits from the specific flow channel design, which promotes the natural separation of the oil phase and the water phase, thereby enhancing the oil-water separation effect. Using the principle of natural stratification, efficient separation of oil and water can be achieved without additional energy consumption, which optimizes the oil-water separation effect on the premise of reducing the treatment cost and improving the treatment efficiency. And, the oil-phase separation plate 31 is composed of several corrugated sheets 311 for adsorbing oil. The setting of the corrugated sheets 311 not only increases the contact area with the oil-water mixture, but also enhances the adsorption capacity of the separation plate for oil. This structure provides more attachment points for oil droplets by increasing the contact area, thereby effectively improving the removal efficiency of oil droplets and further optimizing the oil-water separation effect of this application.

[0038] An air flotation component 4 is arranged between the water-phase diversion plate 32 and an oil-phase separation plate 31 away from the filtering component 2. The air flotation component 4 includes a bubble generator 41 installed at the bottom of the separation tank 1 and a ventilation opening 42 opened at the top of the separation tank 1. The bubble generator 41 can generate tiny bubbles to carry the oil droplets to rise, and the ventilation opening 42 is used to ensure the stability of the water pressure and air pressure in the separation tank 1. And the bubble generator 41 adopts a Venturi tube structure, so as to generate tiny bubbles through compressed air, enhancing the floating effect of the oil droplets physically, making the separation process faster and more thorough, and reducing the residual amount of oil in the wastewater. And, multiple bubble generators 41 can be added according to the actual situation to optimize the air flotation effect. A water-phase outlet 11 for discharging water is opened on the side wall of the separation tank 1 on the side of the air flotation component 4 away from the filtering component 2.

[0039] The implementation principle of the oil-water separation device for industrial wastewater in the embodiment of this application is as follows: Refer to Figure 3, after the industrial wastewater enters the filtration section 22 from the water inlet 21, it will sequentially pass through four filter meshes 221 with gradually decreasing pore sizes. After removing impurity particles, it flows into the space between the first oil-phase separation plate 31 and the water-phase diversion plate 32 from the water outlet 23. As the water volume increases, the water surface continuously rises, and the density difference between the oil and water phases begins to appear. The oil phase gradually floats to the top layer, forming an oil layer, and part of the oil phase will be adsorbed by the corrugated sheet 311 and separated from the water body. When the wastewater passes over the highest point of the water-phase diversion plate 32, it enters the oil-water separation area formed by the corresponding arrangement of the two oil-phase separation plates 31. At this time, the bubble generator 41 starts, continuously emitting tiny bubbles to drive the remaining oil fractions that have not yet floated in the water body to float to the oil layer, making the oil-water separation process very rapid and thorough. The lower water phase will be discharged from the water-phase outlet 11, realizing the rapid separation of oil and water, achieving the integrated and efficient treatment of oily industrial wastewater, simplifying the traditional wastewater treatment process and reducing the operation difficulty.

[0040] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An oil-water separation device for industrial wastewater, characterized in that: It includes a separation tank (1) and a filtration component (2) installed inside the separation tank (1) for removing solid impurities in industrial wastewater, an oil-water separation component (3) for separating water and oil in industrial wastewater, and a flotation component (4) for assisting the oil-water separation component (3).

2. The oil-water separation device for industrial wastewater according to claim 1, characterized in that: The filtration component (2) includes a water inlet (21), a filtration part (22), and a water outlet (23), and the filtration part is arranged between the water inlet (21) and the water outlet (23).

3. The oil-water separation device for industrial wastewater according to claim 2, wherein: The filtration part (22) includes a number of filter meshes (221) arranged in the water flow direction and in sequence from front to back, with the mesh diameters decreasing in sequence.

4. An oil-water separation device for industrial wastewater according to claim 1, characterized in that: The oil-water separation component (3) includes an oil-phase separation plate (31) and a water-phase diversion plate (32) located below the oil-phase separation plate (31).

5. An oil-water separation device for industrial wastewater according to claim 4, characterized in that: The top end of the water-phase diversion plate (32) is higher than the bottom end of the oil-phase separation plate (31).

6. An oil-water separation device for industrial wastewater according to claim 4, characterized in that: Two groups of the oil-phase separation plates (31) are correspondingly arranged and are respectively arranged on both sides of the water-phase diversion plate (32).

7. An oil-water separation device for industrial wastewater according to claim 4, characterized in that: The oil-phase separation plate (31) is composed of a number of corrugated sheets (311) for adsorbing oil.

8. An oil-water separation device for industrial wastewater according to claim 1, characterized in that: The flotation component (4) includes a bubble generator (41) and a ventilation opening (42). The bubble generator (41) is installed at the bottom of the separation tank (1) and is used for generating microbubbles, and the ventilation opening (42) is opened at the top of the separation tank (1).

9. An oil-water separation device for industrial wastewater according to claim 8, characterized in that: The bubble generator (41) adopts a Venturi tube structure to facilitate the generation of microbubbles by compressed air.

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