Continuous air floatation separation device for oil-containing wastewater

Abstract

The utility model relates to wastewater treatment technical field discloses continuous air floatation separation device of oily wastewater, including separation pond, the inside fixed connection of separation pond has upper baffle and lower baffle, the outside fixed connection of separation pond has the water pipe, the top fixed connection of separation pond has the water inlet pipe and the feeding pipe, the inside setting of separation pond has stirring assembly, the top of separation pond is equipped with the residue discharge port, the outside fixed connection of separation pond has pressure tank, the bottom fixed connection of pressure tank has the conveying pipe, the bottom mounting of conveying pipe has quick -detach assembly, the bottom mounting of quick -detach assembly has the connecting pipe. In the utility model, through the cooperation of the clamp one and the clamp two, the cooperation fixed block, the support block, the rotating rod, the fixed rod and the knob structure, the quick assembly and disassembly between the conveying pipe and the connecting pipe are realized, when the release ware is blocked or needs maintenance, only need to rotate the knob to separate the connection quickly, reduce maintenance difficulty and downtime.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a continuous air flotation separation device for oily wastewater. Background Technology

[0002] The continuous air flotation separator for oily wastewater is a highly efficient and environmentally friendly device for treating oily wastewater. It introduces a large number of microbubbles into the wastewater, causing the bubbles to adhere to oil droplets or suspended solids in the water, forming a complex of "bubbles, oil droplets and suspended solids" with a density less than that of water. This complex then floats to the surface to form scum, which is then removed by a scraper or other device, thus achieving the separation of oil, water and solids.

[0003] When existing continuous air flotation separation devices for oily wastewater are in operation, demulsifiers and flocculants are first added, and then the air flotation separation equipment is used to inject saturated dissolved air water into the wastewater to form a saturated dissolved air solution. The oil and solid pollutants are separated by floating using micro bubbles, thereby achieving efficient and continuous oil-water separation.

[0004] However, the release device of the existing device is fixedly connected to the outlet pipe interface of the air compressor by flange and screw. When the release device is damaged or blocked and needs to be replaced, the efficiency is low and long-term shutdown maintenance is required, which affects the working efficiency. In addition, when the air flotation separation is carried out at room temperature, the impurities have high viscosity and poor fluidity, resulting in low efficiency of air flotation separation. Therefore, a continuous air flotation separation device for oily wastewater is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a continuous air flotation separation device for oily wastewater, which aims to improve the problems of slow maintenance of the release device and the impact of low water temperature on the air flotation separation efficiency in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A continuous air flotation separation device for oily wastewater includes a separation tank, an upper baffle and a lower baffle fixedly connected inside the separation tank, an outlet pipe fixedly connected outside the separation tank, an inlet pipe and a feed pipe fixedly connected to the top of the separation tank, a stirring assembly inside the separation tank, a slag discharge port at the top of the separation tank, a pressure tank fixedly connected outside the separation tank, a conveying pipe fixedly connected to the bottom of the pressure tank, a quick-release assembly installed at the bottom of the conveying pipe, a connecting pipe installed at the bottom of the quick-release assembly, and a heating assembly inside the separation tank.

[0008] The quick-release assembly includes a clamp one, which is disposed at the bottom of the delivery pipe. A clamp two is rotatably connected to the outside of the clamp one. The delivery pipe and the connecting pipe are both located between the clamp one and the clamp two. A fixing block is fixedly connected to the outside of the clamp one, and a support block is fixedly connected to the outside of the clamp two. A rotating rod is rotatably connected to the inside of the support block, and a fixing rod is slidably connected to the outside of the rotating rod. The fixing rod and the fixing block are interlocked.

[0009] As a further description of the above technical solution:

[0010] The heating assembly includes a heating water tank, which is fixedly connected to the outside of the separation tank. A heating pipe is fixedly connected inside the separation tank. A return water pipe is fixedly connected to the top of the heating water tank. The end of the return water pipe away from the heating water tank is fixedly connected to the outlet end of the heating pipe. A water injection pipe is fixedly connected to the bottom of the heating water tank. The end of the water injection pipe away from the heating water tank is fixedly connected to the inlet end of the heating pipe. A water pump is fixedly connected between the water injection pipe and the heating pipe.

[0011] As a further description of the above technical solution:

[0012] A sealing ring is fixedly connected to the top of the connecting pipe, and a sealing groove is opened at the bottom of the conveying pipe, with the sealing ring and the sealing groove engaging with each other;

[0013] As a further description of the above technical solution:

[0014] The outer side of the fixing block is provided with a groove, and the rotating rod is located inside the groove;

[0015] As a further description of the above technical solution:

[0016] A knob is threaded onto the outer side of the rotating rod, and the knob is located on the outer side of the fixed rod;

[0017] As a further description of the above technical solution:

[0018] A motor is fixedly connected to the top of the separation tank, and a stirring rod is fixedly connected to the output end of the motor. The stirring rod is rotatably connected inside the separation tank.

[0019] As a further description of the above technical solution:

[0020] The heating tube and the conveying tube are located between the upper baffle and the lower baffle, and a release device is fixedly connected to the bottom of the connecting tube;

[0021] As a further description of the above technical solution:

[0022] A water supply pipe is fixedly connected to the outside of the separation tank, and the other end of the water supply pipe is fixedly connected to the outside of the pressure tank.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by using clamp one and clamp two together, along with a fixing block, support block, rotating rod, fixing rod and knob, quick assembly and disassembly between the conveying pipe and the connecting pipe can be achieved. When the release device is blocked or needs maintenance, there is no need to disassemble the entire pipeline system. Simply rotate the knob to quickly separate the connection, which facilitates the inspection and replacement of the equipment and reduces the difficulty of maintenance and downtime.

[0025] 2. In this utility model, hot water is driven by a water pump to circulate between the heating pipe and the heating water tank to heat the wastewater in the separation tank. Increasing the water temperature can effectively reduce the viscosity of oil droplets and the surface tension of water, enhance the adhesion ability of bubbles and oil droplets, and improve the flotation efficiency. It is suitable for the treatment of low-temperature environments or high-viscosity oily wastewater, and enhances the adaptability and treatment stability of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the continuous air flotation separation device for oily wastewater proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the pressure tank of the continuous air flotation separation device for oily wastewater proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the stirring rod of the continuous air flotation separation device for oily wastewater proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the release device of the continuous air flotation separation device for oily wastewater proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the quick-release component of the continuous air flotation separation device for oily wastewater proposed in this utility model;

[0031] Figure 6 This is a schematic diagram of the heating component structure of the continuous air flotation separation device for oily wastewater proposed in this utility model.

[0032] Legend:

[0033] 1. Separation tank; 2. Upper baffle; 3. Lower baffle; 4. Slag discharge port; 5. Water outlet pipe; 6. Water inlet pipe; 7. Feeding pipe; 8. Water conveying pipe; 9. Pressure tank; 10. Heating water tank; 11. Return water pipe; 12. Motor; 13. Conveying pipe; 14. Connecting pipe; 15. Heating pipe; 16. Release device; 17. Stirring rod; 18. Clamp one; 19. Clamp two; 20. Sealing ring; 21. Sealing groove; 22. Fixing block; 23. Support block; 24. Rotating rod; 25. Knob; 26. Fixing rod; 27. Groove; 28. Water injection pipe; 29. ​​Water pump. Detailed Implementation

[0034] 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.

[0035] Reference Figure 1 , Figure 4 and Figure 5 This utility model provides an embodiment of a continuous air flotation separation device for oily wastewater, including a separation tank 1. The separation tank 1 is the core processing unit of the entire device, with an internal layered structure to achieve oil-water separation. An upper baffle 2 and a lower baffle 3 are fixedly connected inside the separation tank 1. The upper baffle 2 has a certain distance from the bottom of the tank, allowing water to flow out from the bottom for easy mixing when water is added. The lower baffle 3 seals the bottom of the tank, allowing water to flow out from the upper part for easy air flotation separation. A water outlet pipe 5 is fixedly connected to the outside of the separation tank 1, through which the water after air flotation separation is discharged. An inlet pipe 6 and a feed pipe 7 are fixedly connected to the top of the separation tank 1. The inlet pipe 6 is used to add water to be filtered, and the feed pipe 7 can add cleaning chemicals to the water. The separation tank 1 is equipped with a stirring component, which mechanically mixes the reagent and wastewater to accelerate the oil-water separation process. The top of the separation tank 1 has a slag discharge port 4, from which the slag after air flotation is discharged. A pressure tank 9 is fixedly connected to the outside of the separation tank 1. The pressure tank 9 provides a compressed air source for the air flotation system to maintain a stable working pressure. A conveying pipe 13 is fixedly connected to the bottom of the pressure tank 9. The conveying pipe 13 conveys the pressurized water inside the pressure tank 9. A quick-release component is installed at the bottom of the conveying pipe 13. A connecting pipe 14 is installed at the bottom of the quick-release component. The connecting pipe 14 is connected to the release device 16 to form a gas release channel. A heating component is installed inside the separation tank 1. The heating component can improve the oil-water separation effect by adjusting the temperature.

[0036] The quick-release assembly includes clamp 18, which is located at the bottom of the delivery pipe 13. Clamp 18 is a semi-circular stainless steel clamp that fits tightly against the flange end face of the delivery pipe 13. Clamp 29 is rotatably connected to the outside of clamp 18. Clamp 29 and clamp 18 form a rotary quick-release structure, which is opened and closed by a hinge. The delivery pipe 13 and the connecting pipe 14 are both located between clamp 18 and clamp 29. The two clamps fix and seal the delivery pipe 13 and the connecting pipe 14 to prevent gas leakage. A fixing block 22 is fixedly connected to the outside of clamp 18. The fixing block 22 is a limiting structure. A support block 23 is fixedly connected to the outside of clamp 29. A rotating rod 24 is rotatably connected to the inside of the support block 23. The rotating rod 24 can rotate through the support block 23. A fixing rod 26 is slidably connected to the outside of the rotating rod 24. The fixing rod 26 is located at one end of the rotating rod 24. The fixing rod 26 and the fixing block 22 are interlocked. When one end of the rotating rod 24 reaches the side of the fixing block 22, the fixing rod 26 and the fixing block 22 are interlocked to fix the two clamps. The top of the connecting pipe 14 is fixedly connected to a sealing ring 20. The sealing ring 20 is made of nitrile rubber, which has good oil resistance and sealing performance. The bottom of the conveying pipe 13 is provided with a sealing groove 21. The sealing ring 20 and the sealing groove 21 are interlocked. The sealing groove 21 and the sealing ring 20 form an interference fit to ensure the sealing effect. The outer side of the fixing block 22 is provided with a groove 27. The groove 27 provides space for the rotating rod 24 to avoid interference. The rotating rod 24 is located inside the groove 27 to realize the interlocking and fixing of the fixing rod 26 and the fixing block 22. The outer side of the rotating rod 24 is threaded with a knob 25. The knob 25 is located outside the fixing rod 26. The knob 25 is convenient for applying torque manually and can be quickly disassembled and assembled through manual operation. The surface is provided with anti-slip texture.

[0037] Reference Figure 2 , Figure 3 and Figure 6 The heating assembly includes a heating water tank 10, which is fixedly connected to the outside of the separation tank 1. The heating water tank 10 is equipped with an electric heating element and a temperature sensor to achieve constant temperature control. A heating pipe 15 is fixedly connected inside the separation tank 1. The heating pipe 15 adopts a serpentine coil structure to increase the heat exchange area. A return water pipe 11 is fixedly connected to the top of the heating water tank 10. The return water pipe 11 transports the cooled hot water back to the heating water tank 10 to form a closed-loop circulation system. The end of the return water pipe 11 away from the heating water tank 10 is fixedly connected to the outlet end of the heating pipe 15. The return water pipe 11 connects the heating water tank 10 and the heating pipe 15. A water injection pipe 28 is fixedly connected to the bottom of the heating water tank 10. The end of the water injection pipe 28 away from the heating water tank 10 is fixedly connected to the inlet end of the heating pipe 15. The water injection pipe 28 injects a high-temperature medium into the heating pipe 15. A water pump 29 is fixedly connected between the water injection pipe 28 and the heating pipe 15. The water pump 29 adjusts the flow rate through frequency conversion control to achieve precise temperature control.

[0038] Reference Figures 1-4A motor 12 is fixedly connected to the top of the separation tank 1. The motor 12 is explosion-proof and suitable for industrial environments. A stirring rod 17 is fixedly connected to the output end of the motor 12. The motor 12 drives the stirring rod 17 to rotate. The stirring rod 17 is rotatably connected inside the separation tank 1. The stirring rod 17 is equipped with propeller blades on its outside to generate radial and axial flow, which stirs and mixes the water in the separation tank 1. The heating pipe 15 and the conveying pipe 13 are located between the upper baffle 2 and the lower baffle 3. The upper baffle 2 and the lower baffle 3 divide the separation tank 1 into different areas for different operations. A release device 16 is fixedly connected to the bottom of the connecting pipe 14. The release device 16 releases air bubbles into the water to form floating matter. A water supply pipe 8 is fixedly connected to the outside of the separation tank 1. The other end of the water supply pipe 8 is fixedly connected to the outside of the pressure tank 9. The water supply pipe 8 provides water to the pressure tank 9 to maintain stable system pressure.

[0039] Working principle: First, wastewater is transported into the separation tank 1 through the inlet pipe 6. Then, the prepared raw materials are added to the water through the feed pipe 7. Then, the motor 12 is started, which drives the stirring rod 17 at the output end to rotate. The stirring rod 17 mixes the internal solution, which is convenient for subsequent work.

[0040] Secondly, after the mixed water flows through the upper baffle 2, the water pump 29 is started. The water pump 29 transports the high-temperature liquid inside the heating water tank 10 to the heating pipe 15 through the water injection pipe 28. The water inside the separation tank 1 is heated through the bend of the heating pipe 15 to improve the efficiency of air flotation. At the same time, the liquid through the heating pipe 15 returns to the heating water tank 10 through the return water pipe 11 to form a cycle, avoiding heat loss and water waste. After the air flotation is completed, the scum scraper is started to discharge the floating scum from the scum discharge port 4.

[0041] Then, when it is necessary to repair or replace the release device 16, simply turn the knob 25 to loosen the knob 25 from the fixing rod 26. Then, fix the rod 26 along one end of the rotating rod 24 and move the fixing rod 26 out from one side of the fixing block 22. Then, by rotating the rotating rod 24, the clamp 18 and clamp 29 can be separated. After separation, the connecting pipe 14 can be taken out, and the release device 16 at the bottom of the connecting pipe 14 can be replaced. After completion, reverse the operation to fix it.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A continuous air flotation separation device for oily wastewater, comprising a separation tank (1), characterized in that: The separation tank (1) is fixedly connected to an upper baffle (2) and a lower baffle (3). The separation tank (1) is fixedly connected to an outlet pipe (5). The separation tank (1) is fixedly connected to an inlet pipe (6) and a feeding pipe (7) at the top. The separation tank (1) is equipped with a stirring assembly. The separation tank (1) is opened with a slag discharge port (4) at the top. The separation tank (1) is fixedly connected to a pressure tank (9). The pressure tank (9) is fixedly connected to a conveying pipe (13) at the bottom. The conveying pipe (13) is equipped with a quick-release assembly at the bottom. The quick-release assembly is equipped with a connecting pipe (14) at the bottom. The separation tank (1) is equipped with a heating assembly. The quick-release assembly includes a clamp one (18), which is located at the bottom of the delivery pipe (13). A clamp two (19) is rotatably connected to the outside of the clamp one (18). The delivery pipe (13) and the connecting pipe (14) are both located between the clamp one (18) and the clamp two (19). A fixing block (22) is fixedly connected to the outside of the clamp one (18). A support block (23) is fixedly connected to the outside of the clamp two (19). A rotating rod (24) is rotatably connected to the inside of the support block (23). A fixing rod (26) is slidably connected to the outside of the rotating rod (24). The fixing rod (26) and the fixing block (22) are interlocked.

2. The continuous air flotation separation device for oily wastewater according to claim 1, characterized in that: The heating assembly includes a heating water tank (10), which is fixedly connected to the outside of the separation tank (1). A heating pipe (15) is fixedly connected inside the separation tank (1). A return water pipe (11) is fixedly connected to the top of the heating water tank (10). One end of the return water pipe (11) away from the heating water tank (10) is fixedly connected to the outlet end of the heating pipe (15). A water injection pipe (28) is fixedly connected to the bottom of the heating water tank (10). One end of the water injection pipe (28) away from the heating water tank (10) is fixedly connected to the inlet end of the heating pipe (15). A water pump (29) is fixedly connected between the water injection pipe (28) and the heating pipe (15).

3. The continuous air flotation separation device for oily wastewater according to claim 1, characterized in that: A sealing ring (20) is fixedly connected to the top of the connecting pipe (14), and a sealing groove (21) is opened at the bottom of the conveying pipe (13). The sealing ring (20) and the sealing groove (21) are interlocked.

4. The continuous air flotation separation device for oily wastewater according to claim 1, characterized in that: The fixing block (22) has a groove (27) on its outer side, and the rotating rod (24) is located inside the groove (27).

5. The continuous air flotation separation device for oily wastewater according to claim 4, characterized in that: A knob (25) is threaded onto the outside of the rotating rod (24), and the knob (25) is located outside the fixed rod (26).

6. The continuous air flotation separation device for oily wastewater according to claim 1, characterized in that: A motor (12) is fixedly connected to the top of the separation tank (1), and a stirring rod (17) is fixedly connected to the output end of the motor (12). The stirring rod (17) is rotatably connected inside the separation tank (1).

7. The continuous air flotation separation device for oily wastewater according to claim 2, characterized in that: The heating tube (15) and the conveying tube (13) are located between the upper baffle (2) and the lower baffle (3), and a release device (16) is fixedly connected to the bottom of the connecting tube (14).

8. The continuous air flotation separation device for oily wastewater according to claim 1, characterized in that: A water supply pipe (8) is fixedly connected to the outside of the separation tank (1), and the other end of the water supply pipe (8) is fixedly connected to the outside of the pressure tank (9).

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