A water-oil separation treatment device for industrial wastewater

Abstract

The utility model provides a kind of water-oil separation treatment device of industrial wastewater, including water treatment part, oil removal part and backwashing part, the input end of dissolved air pump in the oil removal part is connected with nitrogen gas delivery pipe, the output end of dissolved air pump is connected with the air inlet end of condensation tank and filter tank in water treatment part respectively;The top of the condensation tank and the filter tank is equipped with air outlet, and the air outlet of the condensation tank and the filter tank is connected with oil outlet pipe;The clean water output end of water treatment part is connected with the input end of backwashing pump in backwashing part, and the output end of backwashing pump is connected with the filter tank in water treatment part, the utility model can transport nitrogen into condensation tank and filter tank, the oil separated by filter core from industrial wastewater is attached to the membrane surface of water-oil separation membrane, nitrogen in tank is transported from the lower part of tank, and the oil attached to the membrane surface is blown off, and is discharged from the top air outlet of tank, to realize the oil attached to the membrane surface to be removed, greatly enhance water treatment effect.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment technology, specifically to a water-oil separation treatment device for industrial wastewater. Background Technology

[0002] In the oil extraction and chemical industries, wastewater involves industrial wastewater treatment. This type of industrial wastewater contains large amounts of organic matter, heavy metals, and other harmful substances. Emulsified oil and fine suspended solids can be removed using air flotation. The principle of air flotation is that microbubbles of hydrogen and oxygen are generated at the anode and cathode, causing pollutant particles or flocs formed through pre-coagulation treatment in the wastewater to adhere and float to the surface, forming a foam layer. The foam is then scraped off, thus removing the pollutants. However, this treatment method requires complex equipment and consumes a lot of electricity, increasing treatment costs.

[0003] Another method involves coagulation to remove suspended solids, colloids, heavy metal salts, organic matter, oil, and color pollutants, ensuring the water meets discharge standards. Coagulation is a chemical treatment method that requires the addition of coagulants to coagulate and separate colloidal particles in the wastewater. While this chemical treatment method may leave chemical residues in the water, it still allows for a high degree of recycling.

[0004] Furthermore, while filter cartridges with oil-water separation membranes are currently used to remove oil from industrial wastewater, the oil filtered through the membrane adheres to its surface, significantly reducing the separation efficiency. Therefore, there is an urgent need to design an oil-water separation treatment device for industrial wastewater. Utility Model Content

[0005] In view of this, the problem to be solved by this utility model is to provide a water-oil separation treatment device for industrial wastewater.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a water-oil separation and treatment device for industrial wastewater, comprising a water treatment unit, an oil removal unit, and a backwashing unit. The input end of the dissolved air pump in the oil removal section is connected to the nitrogen delivery pipe, and the output end of the dissolved air pump is connected to the air inlet of the condensation tank and the filter tank in the water treatment section, respectively. The condensation tank and the filter tank are provided with air outlets, and the air outlets of the condensation tank and the filter tank are connected to the oil outlet pipe. The clean water output end of the water treatment unit is connected to the input end of the backwash pump in the backwash unit, and the output end of the backwash pump is connected to the filter tank in the water treatment unit.

[0007] Furthermore, the air inlet ends on the condenser and the filter are located on the lower side of the condenser and the filter, respectively, and the air outlet ends on the condenser and the filter are located on the top of the condenser and the filter, respectively.

[0008] Furthermore, the water treatment unit also includes an inlet pump, the input end of which is connected to an industrial wastewater conveying pipe, the output end of which is connected to an inlet located on the lower side of a condensation tank, the top of which has an outlet, the outlet of which is connected to an inlet located on the lower side of a filter tank, and the outlet located on the upper part of the filter tank is a clean water output end.

[0009] Furthermore, there are multiple condensation tanks, which are connected in series, with the outlets and inlets of adjacent condensation tanks connected together.

[0010] Furthermore, filter elements are installed in the condensation tank and the filter tank. The filter elements are filter elements with water-oil separation membranes, and the water outlet of the filter elements is connected to the water outlet of the condensation tank and the water outlet of the filter tank, respectively.

[0011] Furthermore, both the condensation tank and the filter tank are provided with drain ports at the bottom, and the drain ports are connected to drain pipes.

[0012] Furthermore, an exhaust port is provided on the oil outlet pipe.

[0013] Furthermore, the filter tank is equipped with a spare backwash port.

[0014] The advantages and positive effects of this utility model are: (1) This utility model delivers nitrogen gas into the condensation tank and the filter tank. The oil separated by the filter element in the industrial wastewater adheres to the surface of the water-oil separation membrane. The nitrogen gas delivered from the bottom of the tank blows off the oil adhering to the membrane surface and is discharged from the top outlet of the tank, thereby achieving the removal of the oil adhering to the membrane surface and greatly enhancing the water treatment effect.

[0015] (2) In this utility model, the clean water after being treated by the condensation tank and the filter tank is connected to the input end of the backwash pump, so that the treated clean water is used to backwash the filter element in the condensation tank and the filter tank, thereby realizing recycling. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the flow frame structure of an industrial wastewater oil-water separation and treatment device according to the present invention; Figure 2 This is a front view of an industrial wastewater oil-water separation and treatment device according to the present invention; Figure 3This is a side view of an industrial wastewater oil-water separation and treatment device according to the present invention; In the diagram: 1. Dissolved air pump; 2. Nitrogen delivery pipe; 3. Condensation tank; 31. Water inlet; 32. Water outlet; 4. Filter tank; 41. Water inlet; 42. Water outlet; 43. Backup backwash port; 51. Air inlet; 52. Air outlet; 6. Water inlet pump; 7. Oil outlet pipe; 8. Backwash pump; 9. Sewage outlet; 10. Exhaust outlet; 11. Industrial wastewater delivery pipe; 12. Filter element; 13. Clean water output port; 14. Sewage pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] like Figures 1 to 3 As shown, this utility model provides a water-oil separation and treatment device for industrial wastewater, including a water treatment unit, an oil removal unit, and a backwashing unit. The water treatment unit consists of an inlet pump 6, a condensation tank 3, and a filter tank 4. The input end of the inlet pump 6 is connected to the industrial wastewater conveying pipe 11, and the output end of the inlet pump 6 is connected to the inlet 31 located on the lower side of the condensation tank 3. The top of the condensation tank 3 is provided with an outlet 32, which is connected to the inlet 41 located on the lower side of the filter tank 4. The outlet 42 located on the upper part of the filter tank 4 is connected to the clean water output end 13. When there are multiple condensation tanks 3, they are connected in series. The outlets 32 and inlets 31 of two adjacent condensation tanks 3 are connected, and the outlet 32 ​​of the last condensation tank 3 is connected to the inlet 41 of the filter tank 4. Furthermore, filter elements 12 are installed in the condensation tank 3 and the filter tank 4. The filter elements 12 are filter elements with water-oil separation membranes. The water outlet of the filter elements 12 is connected to the water outlet 32 ​​of the condensation tank 3 and the water outlet 42 of the filter tank 4, respectively. The bottom of the condensation tank 3 and the filter tank 4 are provided with drain ports 9, and the drain ports 9 are connected to the drain pipe 14. It should be noted that the filter elements 12 are existing commercially available components. The filter elements are installed in the condensation tank 3 and the filter tank 4 by fixing them with mounting flanges and bolts. The installation method is a conventional existing technical method. Therefore, the specific structure and installation method of the filter elements 12 will not be described in detail in this application. Industrial wastewater enters from the industrial wastewater delivery pipe 11 and is sequentially sent to the condensation tank 3 and the filter tank 4 by the inlet pump 6. The water and oil are separated by the water-oil separation membrane on the filter element 12. The oil in the wastewater is separated by the membrane and adheres to the membrane surface, while the water enters the membrane and is discharged through the outlet of the filter element 12 and enters the next tank. The water filtered by the filter tank 4 is discharged from the outlet 42 to the clean water output end 13.

[0021] The input end of the dissolved air pump 1 in the oil removal section is connected to the nitrogen delivery pipe 2. The output end of the dissolved air pump 1 is connected to the air inlet 51 of the condensation tank 3 and the filter tank 4 in the water treatment section. The air inlet 51 of the condensation tank 3 and the filter tank 4 are located on the lower side of the condensation tank 3 and the filter tank 4, respectively. The air outlet 52 is provided on the top of the condensation tank 3 and the filter tank 4, respectively. The air outlet 52 of the condensation tank 3 and the filter tank 4 is connected to the oil outlet pipe 7. Nitrogen is delivered to the dissolved air pump 1 through the nitrogen delivery pipe 2. After passing through the dissolved air pump 1, the nitrogen is delivered to the condensation tank 3 and the filter tank 4, respectively. The nitrogen in the tank is delivered from the bottom of the tank to blow off the oil attached to the membrane surface and is discharged from the air outlet at the top of the tank. The cleaned oil is discharged through the water outlet pipe 7 and the nitrogen used for cleaning is discharged through the exhaust port 10. This realizes the operation of removing the oil attached to the membrane surface and greatly enhances the water treatment effect.

[0022] The clean water output terminal 13 of the water treatment unit is connected to the input terminal of the backwash pump 8 in the backwash unit. The output terminal of the backwash pump 8 is connected to the water outlet terminal 42 of the filter tank 4. The treated clean water is delivered into the filter tank 4 and the condensation tank 3 to backwash the filter element 12 in the tank. Because the filter element 12 will become clogged due to oil adhesion after long-term filtration, backwashing can wash away the oil on the membrane surface of the filter element 12 to reduce the clogging. The filtered clean water is used to backwash the filter element 12 in the tank to improve the water recycling rate.

[0023] Furthermore, the filter tank 4 is equipped with a spare backwash port 43, through which external water can be supplied to the filter tank 4 for cleaning.

[0024] The working principle and process of this utility model are as follows: Industrial wastewater is input from the industrial wastewater delivery pipe 11 and sequentially sent to the condensation tank 3 and the filter tank 4 by the inlet pump 6. The wastewater is separated into oil and water by the oil-water separation membrane on the filter element 12. The oil in the wastewater is separated out and adheres to the membrane surface. The water can pass through the oil-water separation membrane on the filter element 12 and enter the membrane. It is discharged from the outlet 32 ​​at the top of the tank and enters the next tank. The water that has passed through the condensation tank 3 enters the filter tank 4 from the inlet end 41. Similarly, the water that has been filtered by the filter element 12 in the filter tank 4 is discharged from the outlet end 42 to the clean water output end 13. During oil removal, dissolved air pump 1 is turned on and water inlet pump 6 is stopped. Nitrogen is delivered to dissolved air pump 1 through nitrogen delivery pipe 2. After passing through dissolved air pump 1, the nitrogen is delivered to condensation tank 3 and filter tank 4 respectively. The nitrogen in the tank is delivered from the bottom to blow off the oil attached to the membrane surface and discharged from the top air outlet of the tank. The cleaned oil is discharged through water outlet pipe 7 and the nitrogen used for cleaning is discharged through exhaust port 10. This achieves the removal of oil attached to the membrane surface and greatly enhances the water treatment effect. During backwashing, dissolved air pump 1 and inlet water pump 6 are both stopped, and backwash pump 8 is turned on. The filtered clean water is sent by backwash pump 8 to filter tank 4 and condensation tank 3 to backwash the filter element 12 in the tank. This not only improves the water recycling rate, but also greatly reduces the clogging problem of filter element 12, thus extending the service life of filter element 12.

[0025] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A water-oil separation and treatment device for industrial wastewater, characterized in that, Includes a water treatment section, an oil removal section, and a backwashing section. The input end of the dissolved air pump (1) in the oil removal section is connected to the nitrogen delivery pipe (2), and the output end of the dissolved air pump (1) is connected to the air inlet (51) of the condensation tank (3) and the filter tank (4) in the water treatment section, respectively. The condensation tank (3) and the filter tank (4) are provided with an air outlet (52), and the air outlet (52) of the condensation tank (3) and the filter tank (4) is connected to the oil outlet pipe (7). The clean water output end (13) of the water treatment unit is connected to the input end of the backwash pump (8) in the backwash unit, and the output end of the backwash pump (8) is connected to the filter tank (4) in the water treatment unit.

2. The water-oil separation and treatment device for industrial wastewater according to claim 1, characterized in that, The air inlet (51) on the condenser (3) and the filter (4) are located on the lower side of the condenser (3) and the filter (4), respectively, and the air outlet (52) on the condenser (3) and the filter (4) are located on the top of the condenser (3) and the filter (4), respectively.

3. The water-oil separation and treatment device for industrial wastewater according to claim 1, characterized in that, The water treatment unit also includes an inlet pump (6), the input end of which is connected to an industrial wastewater conveying pipe (11), the output end of which is connected to an inlet (31) provided on the lower side of the condensation tank (3), the top of the condensation tank (3) is provided with an outlet (32), the outlet (32) of the condensation tank (3) is connected to an inlet (41) provided on the lower side of the filter tank (4), and the outlet (42) provided on the upper part of the filter tank (4) is connected to a clean water output end (13).

4. The water-oil separation and treatment device for industrial wastewater according to claim 3, characterized in that, The number of condensation tanks is multiple, and the multiple condensation tanks (3) are connected in series. The outlet (32) and inlet (31) of two adjacent condensation tanks (3) are connected.

5. An industrial wastewater oil-water separation and treatment device according to claim 3 or 4, characterized in that, The condensation tank (3) and the filter tank (4) are equipped with filter elements (12), which are filter elements with water-oil separation membranes. The water outlet of the filter element (12) is connected to the water outlet (32) of the condensation tank (3) and the water outlet (42) of the filter tank (4), respectively.

6. The water-oil separation and treatment device for industrial wastewater according to claim 5, characterized in that, Both the condensation tank (3) and the filter tank (4) are provided with a drain port (9) at the bottom, and the drain port (9) is connected to the drain pipe (14).

7. The water-oil separation and treatment device for industrial wastewater according to claim 1, characterized in that, An exhaust port (10) is provided on the oil outlet pipe (7).

8. The water-oil separation and treatment device for industrial wastewater according to claim 1, characterized in that, The filter tank (4) is equipped with a spare backwash port (43).

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