CN220485383U - Integrated partial reflux pressurized dissolved air flotation experimental device - Google Patents

Abstract

The utility model relates to an integrated partial reflux pressurized dissolved air floatation experiment device which comprises an air floatation separation system, a reflux water pressure dissolved air floatation system, a test bed, a power control box, a sewage box and a clean water box, wherein the air floatation separation system is arranged on the test bed; the air flotation separation system is fixed on the left side of the upper end platform of the test bed and is provided with a slag scraper, a water inlet pipe, a water outlet pipe, a blow-down pipe and a slag discharge pipe; the power control box is fixed on the right side of the upper end platform of the test bed and is used for controlling the start and stop of the water pump, the air compressor and the slag scraper; the sewage tank and the clean water tank are fixed on the supporting leg at the lower end of the test bed, and the middle of the sewage tank and the clean water tank are separated by a partition plate; the backflow water pressure air dissolving system is fixed on the right side of the lower end of the test bed, is connected with a water inlet pipe and an air pipe, and is connected with the air floatation separation system through an air dissolving water outlet pipe. The utility model has the advantages of simple structure, high intensification degree, convenient operation control and high practicability, and is suitable for wastewater pretreatment of teaching and scientific research experiments.

Description

Integrated partial reflux pressurized dissolved air flotation experimental device

Technical field

The utility model relates to a wastewater treatment experimental device, in particular to an integrated partial reflux pressurized dissolved air flotation experimental device.

Background technique

Air flotation is an effective solid-liquid and liquid-liquid separation method, often used for the separation of fine particles whose particle density is close to or smaller than water. The air flotation treatment technology forms tiny bubbles in the water, which adsorb the tiny bubbles to the particles suspended in the water to form a water-air-particle three-phase mixed system. After the particles adhere to the bubbles, they form floating floccules with an apparent density smaller than that of water. The floc floats to the water surface and forms a scum layer that is scraped off to achieve solid-liquid separation. In wastewater treatment projects, air flotation treatment technology has been widely used in the oil-water separation of oily wastewater in petroleum, chemical and machinery manufacturing industries, the recovery of pulp fibers and fillers in papermaking wastewater, and industries containing suspended solids with a relative density close to 1. Pretreatment of wastewater, etc.

Among various types of air flotation technology, pressurized dissolved air flotation is currently a commonly used air flotation treatment method. This method makes air dissolve in water under pressurized conditions, and then releases the pressure to normal pressure to make the process Saturated dissolved air is released in the form of fine bubbles. The pressurized dissolved air flotation method can be divided into full pressurized dissolved air process, partial pressurized dissolved air process and partial reflux pressurized dissolved air process according to the different sources of pressurized dissolved air water. Among them, the partial reflux pressurized dissolved air process is Pressurized air-dissolved water is clarified water that has undergone air flotation treatment, which is more beneficial to the dissolved air and decompression release processes. It is currently the most commonly used air flotation treatment process. At present, the existing partial reflux pressurized dissolved air flotation experimental device has insufficient equipment structure, complete sets, and low degree of integration, which affects the experimental results and is inconvenient for users to operate. Therefore, the development of a complete, integrated partial reflux pressurized dissolved air flotation experimental device is of great significance to small-scale teaching and scientific research experimental operations.

Utility model content

In order to solve the problems of insufficient structure, complete sets, and low integration level of the experimental device equipment proposed in the above background technology, the present invention provides an integrated partial reflux pressurized dissolved air flotation experimental device.

The technical solution adopted by this utility model to solve its technical problems is:

Integrated partial reflux pressurized dissolved air flotation experimental device, including an air flotation separation system, a reflux water pressure dissolved air system, a test bench, a power control box, a sewage tank and a clean water tank; the air flotation separation system is fixed on the top of the test bench The left side of the platform; the power control box is fixed on the right side of the upper platform of the test bench and is used to control the start and stop of the sewage pump, return water pressure pump, air compressor and slag scraper; the sewage tank and clean water tank are fixed on On the lower end leg of the test bench, the sewage tank and the clean water tank are separated by a partition; the return water pressure dissolved gas system is fixed on the right side of the lower end of the test bench and is connected to the air flotation separation system through the dissolved gas water outlet pipe.

As a preferred technical solution, the air flotation separation system is fixed on the left side of the upper platform of the test bench and includes a sewage pump, a sewage inlet pipe, a sewage inlet pipe valve, a sewage inlet flow meter, a slag scraper, a slag collecting tank, and a discharge pipe. Slag pipe, semi-vent pipe, semi-vent valve, perforated water collection pipe, outlet water level controller, outlet water collection tank, outlet pipe, outlet valve, air flotation tank contact chamber, air flotation tank separation chamber and vent valve, vent pipe; all The sewage water pump is connected to the sewage inlet pipe valve, the sewage inlet flow meter and the sewage inlet pipe. The sewage inlet pipe is connected to the left middle position of the separation chamber of the air flotation tank for system sewage inlet; the slag collecting tank is connected with the slag discharge The pipes are connected, and the slag discharge pipe is connected to the upper left side of the separation chamber of the air flotation tank for system slag collection and discharge; the perforated water collection pipe is located in the middle of the air flotation tank and is connected from the right side of the air flotation tank to the outlet water collection tank. And the outlet water level is controlled by the outlet water level controller, which is used to discharge the clean water in the air flotation tank to the water collection tank; the water outlet water tank is located at the outer top position on the right side of the air flotation tank, and is connected to the water outlet pipe and the water outlet valve at the same time. The water outlet pipe is connected to the clean water tank. box for system water discharge.

As a preferred technical solution, the return water pressure dissolved gas system is fixed on the right side of the lower end of the test bench, including a return water pressure pump, a return water inlet pipe, a return water inlet valve, a return water inlet flow meter, and a pressure dissolved gas system. Tank, pressure gauge, pressure relief pipe, pressure relief valve, air compressor, air pipe, dissolved gas water drainage valve, dissolved gas water outlet pipe, dissolved gas water outlet valve, dissolved gas water outlet flow meter, dissolved gas releaser; The return water pressure pump is connected to the return water inlet pipe, the return water inlet valve and the return water inlet flow meter. The return water inlet pipe is connected to the top of the pressure dissolved gas tank for the return water to the pressure dissolved gas tank. ; The upper right side of the pressure dissolved gas tank is connected to a pressure gauge for monitoring the pressure in the pressure dissolved gas tank; the upper left side of the pressure dissolved gas tank is connected to a pressure relief pipe and a pressure relief valve for pressure relief in the pressure dissolved gas tank ; The lower left side of the pressure-dissolved gas tank is connected to an air compressor through an air pipe, which is used to pressurize the pressure-dissolved gas tank to dissolve air in the water; the bottom of the pressure-dissolved gas tank is connected to a dissolved gas water drainage valve and a dissolved gas water The outlet pipe, the dissolved gas water outlet pipe is connected to the dissolved gas water outlet valve, the dissolved gas water outlet flow meter and the dissolved gas releaser. The dissolved gas water outlet pipe and the dissolved gas releaser are connected to the inside of the contact chamber of the air flotation separation system. The pressure in the dissolved gas water is reduced, so that the gas in the dissolved gas water is released in the form of micro bubbles and adheres to the suspended particles in the water.

As a preferred technical solution, the power control box is fixed on the right side of the upper platform of the test bench and is equipped with a main power switch, a sewage pump power supply, a return water pressure pump power supply, an air compressor power supply, a slag scraper power supply, and a slag scraper power supply. Machine speed regulator; the power control box is connected to the sewage pump, return water pressure pump, air compressor and slag scraper through the control circuit to control their start and stop.

As a preferred technical solution, the sewage tank and the clean water tank are fixed on the lower end legs of the test bench, and the sewage tank and the clean water tank are separated by a partition; the left lower part of the sewage tank is connected to the sewage pump, and the right side of the clean water tank is connected to the sewage pump. The lower part is connected to a return water pressure pump; the semi-vent pipe and vent pipe sewage are connected to the sewage tank, and the clean water from the outlet pipe of the air flotation separation system is connected to the clean water tank.

As a preferred technical solution, the test bench is made of stainless steel plate, which has good corrosion resistance and is easy to clean; the air flotation tank, sewage tank and clean water tank of the air flotation separation system are made of organic glass plate, which is easy to clean; The pressure dissolved gas tank of the return water pressure dissolved gas system is made of stainless steel and has good corrosion resistance and pressure resistance.

Due to the adoption of the above technical solution, the utility model has the following beneficial effects: an integrated partial reflux pressurized dissolved air flotation experimental device, which lifts sewage to the air flotation tank of the air flotation separation system through a sewage pump, and adds reflux water to the air flotation tank. The pressure pump lifts the treated clean water to the pressure dissolved gas tank of the return water pressure dissolved gas system. The air is sent to the pressure dissolved gas tank at a certain pressure through the air compressor, so that the air dissolves in the clean water and passes through the dissolved gas water outlet pipe. The dissolved gas water is sent to the air flotation tank contact chamber of the air flotation separation system, and the pressure of the dissolved gas water is decompressed through the dissolved gas releaser, so that the gas in the dissolved gas water is released in the form of microbubbles and mixes with the suspended particles in the water It adheres and floats to the water surface, forming a scum layer that is scraped off. The sewage pump, return water pressure pump, air compressor and slag scraper are started and stopped through the control circuit of the power control box. The utility model has a simple structural design. , high degree of integration, easy to move and highly practical.

Description of the drawings

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes:

Figure 1 is a schematic diagram of the device structure of the present utility model.

The specific identification in the picture is:

1. Test bench, 2. Power control box, 3. Sewage tank, 4. Clean water tank, 5. Sewage pump, 6. Sewage inlet pipe valve, 7. Sewage inlet flow meter, 8. Sewage inlet pipe, 9. Slag scraper, 10. Return water pressure pump, 11. Return water inlet valve, 12. Return water inlet pipe, 13. Pressure dissolved gas tank, 14. Pressure gauge, 15. Pressure relief pipe, 16. Pressure relief valve , 17. Air pipe, 18. Air compressor, 19. Dissolved air water drainage valve, 20. Dissolved air water outlet pipe, 21. Dissolved air water outlet valve, 22. Dissolved air water outlet flow meter, 23. Dissolved air release 24. Slag collecting tank, 25. Slag discharge pipe, 26. Semi-vent pipe, 27. Semi-vent valve, 28. Perforated water collecting pipe, 29. Water outlet level controller, 30. Water outlet valve, 31. Water outlet pipe , 32. Outlet water collection tank, 33. Vent valve, 34. Air flotation tank contact chamber, 35. Air flotation tank separation chamber, 36. Return water inlet flow meter, 37. Main power switch, 38. Slag scraper speed regulator, 39. Power supply for sewage pump, 40. Power supply for return water pressure pump, 41. Power supply for air compressor, 42. Power supply for slag scraper, 43. Vent pipe, 44. Partition plate.

Detailed ways

The utility model will be further described below in conjunction with specific implementation modes:

Example 1

As shown in Figure 1, the integrated partial reflux pressurized dissolved air flotation experimental device includes an air flotation separation system, a reflux water pressure dissolved air system, a test bench 1, a power control box 2, a sewage tank 3 and a clean water tank 4; The air flotation separation system is fixed on the left side of the upper platform of the test bench 1; the power control box 2 is fixed on the right side of the upper platform of the test bench 1 and is used to control the sewage pump 5, the return water pressure pump 10, and the air compressor 18 And the slag scraper 9 starts and stops; the sewage tank 3 and the clean water tank 4 are fixed on the lower end legs of the test bench, and the sewage tank 3 and the clean water tank 4 are separated by a partition 44; the return water pressure dissolved gas system is fixed On the right side of the lower end of the test bench 1, it is connected to the air flotation separation system through the dissolved air water outlet pipe 20.

Further, the air flotation separation system is fixed on the left side of the upper platform of the test bench 1 and includes a sewage pump 5, a sewage inlet pipe 8, a sewage inlet pipe valve 6, a sewage inlet flow meter 7, a slag scraper 9, and a slag collector. Tank 24, slag discharge pipe 25, semi-vent pipe 26, semi-vent valve 27, perforated water collection pipe 28, outlet water level controller 29, outlet water collection tank 32, outlet pipe 31, outlet valve 30, air flotation tank contact chamber 34, The air flotation tank separation chamber 35 and the vent valve 33 and the vent pipe 43; the sewage water pump 5 is connected to the sewage inlet pipe valve 6, the sewage inlet flow meter 7 and the sewage inlet pipe 8, and the sewage inlet pipe 8 is connected to the air flotation tank separation The left middle position of the chamber 35 is used for system sewage water inflow; the slag collecting tank 24 is connected to the slag discharge pipe 25, and the slag discharge pipe 25 is connected to the left upper position of the air flotation tank separation chamber 35 for system slag collection and slag discharge. ; The perforated water collecting pipe 28 is located in the middle position inside the air flotation tank, and is connected from the right side of the air flotation tank to the outlet water collection tank 32, and controls the outlet water level through the outlet water level controller 29, which is used to discharge the clean water in the air flotation tank to the water collection tank. Sink; the water outlet water collection tank 32 is located at the outer top position on the right side of the air flotation tank, and is connected to the outlet pipe 31 and the outlet valve 30. The outlet pipe 31 is connected to the clean water tank 4 for system water outlet.

Further, the return water pressure dissolved gas system is fixed on the right side of the lower end of the test bench 1 and includes a return water pressure pump 10, a return water inlet pipe 12, a return water inlet valve 11, a return water inlet flow meter 36, a pressure Dissolved gas tank 13, pressure gauge 14, pressure relief pipe 15, pressure relief valve 16, air compressor 18, air pipe 17, dissolved gas water drainage valve 19, dissolved gas water outlet pipe 20, dissolved gas water outlet valve 21, dissolved gas water outlet valve Gas and water outlet flow meter 22, dissolved gas releaser 23; the return water pressure pump 10 is connected to the return water inlet pipe 12, the return water inlet valve 11 and the return water inlet flow meter 36, and the return water inlet pipe 12 is connected to The top of the pressure-dissolved gas tank 13 is connected for reflux water to the pressure-dissolved gas tank 13; the upper right side of the pressure-dissolved gas tank 13 is connected to a pressure gauge 14 for monitoring the pressure in the pressure-dissolved gas tank 13; the pressure The upper left side of the dissolved gas tank 13 is connected to a pressure relief pipe 15 and a pressure relief valve 16 for pressure relief of the pressure dissolved gas tank 13; the lower left side of the pressure dissolved gas tank 13 is connected to the air compressor 18 through an air pipe 17 for use The pressure dissolved air tank 13 is pressurized to dissolve air in water; the bottom of the pressure dissolved air tank 13 is connected to a dissolved air water drainage valve 19 and a dissolved air water outlet pipe 20, and the dissolved air water outlet pipe 20 and the dissolved air water outlet valve 21 are connected , the dissolved gas water outlet flow meter 22 is connected to the dissolved gas releaser 23. The dissolved gas water outlet pipe 20 and the dissolved gas releaser 23 are connected to the inside of the air flotation pool contact chamber 34 of the air flotation separation system for decompression of the pressure dissolved gas water. , causing the gas in the dissolved gas water to be released in the form of microbubbles and adhere to the suspended particles in the water.

Further, the power control box 2 is fixed on the right side of the upper platform of the test bench 1 and is provided with a main power switch 37, a sewage pump power supply 39, a return water pressure pump power supply 40, an air compressor power supply 41, and a slag scraper power supply. 42. Slag scraper speed regulator 38. The power control box 2 is connected to the sewage pump 5, the return water pressure pump 10, the air compressor 18 and the slag scraper 9 through a control circuit to control their start and stop.

Further, the sewage tank 3 and the clean water tank 4 are fixed on the lower end legs of the test bench, and the sewage tank 3 and the clean water tank 4 are separated by a partition 44; the left lower part of the sewage tank 3 is connected to the sewage pump 5 and the clean water tank. 4. The lower part on the right side is connected to the return water pressure pump 10; the semi-vent pipe 26 and the vent pipe 43 are connected to the sewage tank 3, and the air flotation separation system outlet pipe 31 is connected to the clean water tank 4 for clean water.

Furthermore, the test bench 1 is made of stainless steel plate, which has good corrosion resistance and is easy to clean; the air flotation tank, sewage tank 3 and clean water tank 4 of the air flotation separation system are made of organic glass plate, which is easy to clean; The pressure dissolved gas tank 13 of the return water pressure dissolved gas system is made of stainless steel and has good corrosion resistance and pressure resistance.

When the device of the utility model is working, the sewage pump 5 is turned on through the sewage pump power supply 39 on the power control box 2, and the sewage inlet pipe valve 6 is opened, and the sewage in the sewage tank 3 is pumped into the air flotation tank through the sewage inlet pipe 8 for separation. Inside the chamber 35; turn on the return water pressure pump 10 through the return water pressure pump power supply 40 on the power control box 2, and open the return water inlet valve 11, and pump the clean water in the clean water tank 4 through the return water inlet pipe 12 In the pressure dissolved air tank 13, the air compressor 18 is opened at the same time to send air to the pressure dissolved air tank 13 through the air pipe 17 to form pressure dissolved air water. The water inlet speed and pressure dissolved air are controlled by adjusting the return water inlet flow meter 36. The pressure in the tank 13; open the dissolved gas water outlet valve 21, adjust the dissolved gas water outlet flow meter 22 so that the pressure dissolved gas water enters the air flotation pool contact chamber 34 at a certain flow rate through the dissolved gas water outlet pipe 20, and passes through the dissolved gas releaser 23 The function of the pressure-dissolved water is to depressurize the dissolved gas water, so that the gas in the dissolved gas water is released in the form of micro bubbles. The micro bubbles fully contact and adhere to the suspended particles in the water in the contact chamber 34 of the air flotation tank and float to the liquid surface to form a scum layer. , open the slag scraper 9 to scrape the scum to the slag collecting tank 24, and discharge the scum through the slag discharge pipe 25. The lower clean water enters the outlet water collection tank 32 through the perforated water collection pipe 28, and is finally discharged to the clean water tank through the water outlet pipe 31. 4. The sinkable particles settle in the cone at the bottom of the separation chamber 35 of the air flotation tank. Open the vent valve 33 to discharge the sediment.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. The above embodiments and descriptions only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, The present utility model will also have various changes and improvements, and these changes and improvements will fall within the scope of the claimed utility model. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. Integrated partial reflux pressurized dissolved air flotation experimental device, including air flotation separation system, reflux water pressure dissolved air system, test bench (1), power control box (2), sewage tank (3) and clean water tank ( 4), characterized in that: the air flotation separation system is fixed on the left side of the upper platform of the test bench (1); the power control box (2) is fixed on the right side of the upper platform of the test bench (1) and is used to control sewage pumping. The water pump (5), return water pressure pump (10), air compressor (18) and slag scraper (9) start and stop; the sewage tank (3) and the clean water tank (4) are fixed on the lower end legs of the test bench on the test bench (1), the sewage tank (3) and the clean water tank (4) are separated by a partition (44); the return water pressure dissolved gas system is fixed on the right side of the lower end of the test bench (1), and passes through the dissolved gas water outlet pipe ( 20) Connected to the air flotation separation system. 2. The integrated partial reflux pressurized dissolved air air flotation experimental device according to claim 1, characterized in that: the air flotation separation system is fixed on the left side of the upper platform of the test bench (1) and includes a sewage pump (5 ), sewage inlet pipe (8), sewage inlet pipe valve (6), sewage inlet flow meter (7), slag scraper (9), slag collecting tank (24), slag discharge pipe (25), semi-empty Pipe (26), semi-venting valve (27), perforated water collection pipe (28), outlet water level controller (29), outlet water collection tank (32), outlet pipe (31), outlet valve (30), air flotation tank contact chamber (34), air flotation tank separation chamber (35), vent valve (33), and vent pipe (43); among them, the sewage pump (5), the sewage inlet pipe valve (6), and the sewage inlet flow meter (7 ) is connected to the sewage inlet pipe (8), the slag collecting tank (24) is connected to the slag discharge pipe (25), the perforated water collecting pipe (28) is connected to the outlet water collecting tank (32), and passes through the outlet water level controller (29) ) controls the outlet water level, and the outlet water collection tank (32) is connected to the outlet pipe (31) and the outlet valve (30) at the same time. 3. The integrated partial reflux pressurized dissolved air flotation experimental device according to claim 1, characterized in that: the reflux water pressure dissolved air system is fixed on the right side of the lower end of the test bench (1) and includes reflux water pressurization. Pump (10), return water inlet pipe (12), return water inlet valve (11), return water inlet flow meter (36), pressure dissolved gas tank (13), pressure gauge (14), pressure relief pipe ( 15), pressure relief valve (16), air compressor (18), air pipe (17), dissolved gas water drainage valve (19), dissolved gas water outlet pipe (20), dissolved gas water outlet valve (21), Dissolved gas water outlet flow meter (22), dissolved gas releaser (23); among them, the return water pressure pump (10), the return water inlet pipe (12), the return water inlet valve (11) and the return water inlet The flow meter (36) is connected, the return water inlet pipe (12) is connected to the top of the pressure dissolved gas tank (13), the pressure gauge (14) is connected to the upper right side of the pressure dissolved gas tank (13), and the pressure gauge (14) is connected to the left side of the pressure dissolved gas tank (13). The pressure relief pipe (15) and pressure relief valve (16) are connected to the upper side, the air compressor (18) is connected to the lower left side of the pressure dissolved gas tank (13) through the air pipe (17), and the bottom of the pressure dissolved gas tank (13) is connected Dissolved gas water drainage valve (19) and dissolved gas water outlet pipe (20), dissolved gas water outlet pipe (20) and dissolved gas water outlet valve (21), dissolved gas water outlet flow meter (22) and dissolved gas releaser (23) are connected, and the dissolved gas water outlet pipe (20) and the dissolved gas releaser (23) are connected to the inside of the air flotation pool contact chamber (34) of the air flotation separation system. 4. The integrated partial reflux pressurized dissolved air flotation experimental device according to claim 1, characterized in that: the power control box (2) is fixed on the right side of the upper platform of the test bench (1) and is equipped with a power supply main unit. Switch (37), sewage pump power supply (39), return water pressure pump power supply (40), air compressor power supply (41), slag scraper power supply (42), slag scraper speed regulator (38), so The power control box (2) is connected to the sewage pump (5), return water pressure pump (10), air compressor (18) and slag scraper (9) through a control circuit. 5. The integrated partial reflux pressurized dissolved air flotation experimental device according to claim 2, characterized in that: the sewage tank (3) and the clean water tank (4) are fixed on the lower end legs of the test bench, and the sewage tank (3) and the clean water tank (4) are separated by a partition (44); the left lower part of the sewage tank (3) is connected to the sewage pump (5), and the lower right side of the clean water tank (4) is connected to the return water pressure pump ( 10); The sewage from the semi-vent pipe (26) and the vent pipe (43) is connected to the sewage tank (3), and the clean water from the outlet pipe (31) of the air flotation separation system is connected to the clean water tank (4). 6. The integrated partial reflux pressurized dissolved air air flotation experimental device according to any one of claims 1 to 3, characterized in that: the test bench (1) is made of stainless steel plate, and the air flotation separation The system air flotation tank, sewage tank (3), and clean water tank (4) are made of organic glass plates, and the pressure dissolved gas tank (13) of the return water pressure dissolved gas system is made of stainless steel.