Efficient dissolved air flotation device

Abstract

The utility model provides a high-efficiency dissolved air flotation device which is characterized in that an air dissolving tank body and an air flotation box are arranged at the upper end of a base, and the bottom of the air dissolving tank body is communicated with the air flotation box at the bottom end part of the air flotation box through a plurality of groups of ejection pipes; a water level sensor used for detecting the upper liquid level in the box is arranged in the air floatation box, and an impurity scraping assembly, an impurity removing assembly and a stirring assembly are further arranged in the air floatation box; the impurity scraping assembly is used for cleaning impurities in the box through an impurity scraping plate; the impurity removing assembly is used for removing impurities on the right side plate face of the impurity scraping plate through a pair of impurity removing plates. In the stirring assembly, stirring blades are arranged at the bottom end of an electric telescopic rod, are suspended in the air floating box, and are driven by a stirring driving mechanism to rotate. According to the utility model, the manufacturing cost can be reduced while gas-liquid mixing and pressurizing are realized, the device is not easy to block and has a certain self-cleaning function, and the aim of improving the impurity removal efficiency while the sewage treatment efficiency is not influenced is fulfilled.

Description

Technical Field

[0001] The utility model relates to a high-efficiency dissolved air flotation device. Background Art

[0002] Dissolved air flotation equipment is widely used in the fields of industrial wastewater, high-concentration organic wastewater pretreatment, printing and dyeing and leather wastewater treatment. It uses the dissolved air pump to suck a certain amount of air from the water inlet through negative pressure, mix with water, pressurize and store in the dissolved air tank, and quickly release it through the releaser to generate a large number of fine bubbles that adhere to the alum flocs in the wastewater after the coagulation reaction, so that the flocs float, thereby quickly removing pollutants in the wastewater and achieving the purpose of water purification. The existing dissolved air flotation equipment has the following technical problems:

[0003] Dissolved air flotation equipment uses dissolved air pumps to pressurize gas-liquid mixing, but dissolved air pumps are expensive and prone to clogging. The scrapers used to clean floating impurities in the equipment are prone to residues on the surface after long-term use. Currently, they are usually cleaned manually after shutdown, which is time-consuming and labor-intensive and affects the efficiency of sewage treatment. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a high-efficiency dissolved air flotation device, in order to reduce the construction cost while realizing gas-liquid mixing and pressurization. At the same time, it is not easy to be blocked and has a certain self-cleaning function, so as to achieve the goal of improving the cleaning efficiency without affecting the sewage treatment efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-efficiency dissolved air flotation device, the structural features of which are:

[0007] A dissolved air tank is set up on the front side of the upper end of the base, and an air flotation box is set up on the rear side. The dissolved air tank is filled with air by a silent air compressor through an air delivery component, and water is added by a pipeline pump through a water delivery component. The bottom is connected to the air flotation box at the bottom end of the air flotation box through multiple groups of spray pipes. A third valve is set at one end of the spray pipe connected to the dissolved air tank, and a releaser is set at one end connected to the air flotation box.

[0008] The flotation tank is provided with a water level sensor for detecting the upper liquid level in the tank, and is also equipped with a scraping assembly, a cleaning assembly and a stirring assembly; in the scraping assembly, the scraping plate is located in the flotation tank, above the water level sensor, spanning between the front and rear side walls of the flotation tank, and driven by the scraping drive mechanism to slide back and forth horizontally in the left and right directions in the tank, and a debris discharge port with the same height and size as the scraping plate is provided on the right side of the flotation tank, and the scraping plate can slide to the right to the debris discharge port, and the right side of the plate surface is adaptively exposed through the debris discharge port; the cleaning assembly In the component, a cleaning box is arranged outside the right side of the air flotation box, and the impurity discharge port is arranged inside. A pair of cleaning plates driven by a cleaning drive mechanism and capable of horizontally reciprocating and sliding toward or away from each other in the front and rear directions are arranged inside the box. The left plate end of the cleaning plate can contact the right plate surface of the scraping plate exposed at the impurity discharge port, and the impurities on the right plate surface of the scraping plate are cleaned by sliding. In the stirring component, a stirring blade is arranged at the bottom end of the electric telescopic rod and is suspended in the air flotation box, and the upper end is exposed above the air flotation box and is driven by the stirring drive mechanism to rotate.

[0009] The structural features of the utility model also lie in:

[0010] In the scraper assembly, the scraper drive mechanism includes a fixed seat, a second motor, and a screw-nut assembly. The screw-nut assembly and the second motor are externally arranged at the rear end of the flotation tank through the fixed seat. The screw is horizontally arranged in the left and right directions and can be rotated by the second motor. The nut is connected to the rear end of the scraper plate, and the scraper plate can be slidably arranged between the front and rear side walls of the flotation tank.

[0011] In the debris cleaning component, the debris cleaning driving mechanism includes a guide column, a bidirectional screw, a connecting frame, a rotating shaft, a transmission belt, a first bevel gear, a third motor, and a second bevel gear. The third motor drives the rotating shaft coaxially connected to the first bevel gear through the meshing second bevel gear and the first bevel gear, and the rotating shaft is driven to rotate. The rotating shaft is rotatably arranged on the connecting frame, and the two ends are respectively connected to the two ends of the bidirectional screw through the transmission belt to drive the bidirectional screw to rotate. A pair of debris cleaning plates are respectively connected to a pair of nuts sleeved on the bidirectional screw. The guide column is a fixed component, which is horizontally arranged in the front-rear direction and passes through a pair of debris cleaning plates. The pair of debris cleaning plates can slide along the guide column.

[0012] In the stirring assembly, the stirring drive mechanism includes a first motor, a first spur gear, and a second spur gear, which are integrally installed on the top plate at the upper end of the flotation tank and are driven by the first motor. The second spur gear is meshed with the first spur gear to drive the electric telescopic rod coaxially connected to the first spur gear to rotate synchronously with the first spur gear.

[0013] The dissolved gas tank body is filled with gas by a silent air compressor through an air delivery component, and the air delivery component includes an air delivery pipe. The output end of the silent air compressor is connected to the dissolved gas tank body through the air delivery pipe. A pressure regulating valve is provided at one end of the air delivery pipe connected to the silent air compressor, and an electromagnetic valve is provided at one end connected to the dissolved gas tank body. A gas flow meter is also provided between the pressure regulating valve and the electromagnetic valve.

[0014] The dissolved air tank body is filled with water by a pipeline pump through a water delivery assembly. The water delivery assembly includes a drainage pipe connected to the drainage port of the pipeline pump and a water suction pipe connected to the water suction port of the pipeline pump. The other end of the drainage pipe is connected to the dissolved air tank body, and a second valve is provided at one end connected to the pipeline pump. A first valve is provided at one end of the water suction pipe connected to the pipeline pump, and the other end is connected to the water outlet of the basket filter, and receives external water source through the water inlet of the basket filter.

[0015] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0016] The utility model adopts the overall structural coordination design, so that the high-efficiency dissolved air flotation device can realize gas-liquid mixing and pressurizing, greatly reduce the construction cost, and is not easy to be blocked. At the same time, the debris cleaning component facilitates the automatic cleaning of the scraping plate in the scraping component, so there is no need to stop the machine for manual cleaning, thereby improving the cleaning efficiency without affecting the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0019] Figure 3 It is a partial structural schematic diagram of the dissolved gas tank in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the scraping component and the stirring component provided by the utility model;

[0021] Figure 5 It is a structural schematic diagram of the debris removal component in the utility model.

[0022] In the figure, 1, base; 2, support; 3, dissolved gas tank; 4, air flotation tank; 5, top plate; 6, silent air compressor; 7, pipeline pump; 8, gas pipeline; 9, pressure regulating valve; 10, solenoid valve; 11, gas flow meter; 12, water pump; 13, first valve; 14, drain pipe; 15, second valve; 16, basket filter; 17, ejection pipe; 18, third valve; 19, releaser; 20, electric telescopic rod; 21, stirring Blade; 22. first flat gear; 23. first motor; 24. second flat gear; 25. water level sensor; 26. fixing seat; 27. second motor; 28. threaded rod; 29. ​​scraper plate; 30. debris removal box; 31. guide column; 32. bidirectional screw; 33. debris removal plate; 34. connecting frame; 35. rotating shaft; 36. transmission belt; 37. first bevel gear; 38. third motor; 39. second bevel gear; 40. debris removal port. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Please refer to Figures 1 to 5 The structure of the high-efficiency dissolved air flotation device of this embodiment is as follows:

[0025] The front side of the upper end of the base 1 is provided with a dissolved gas tank body 3 through a support 2, and a flotation tank 4 is arranged at the rear side. The dissolved gas tank body 3 is filled with gas by a silent air compressor 6 through an air delivery assembly, and water is added by a pipeline pump 7 through a water delivery assembly. The bottom is connected to the flotation tank 4 at the bottom end of the flotation tank 4 through multiple groups of ejection pipes 17, so that when water and gas are mixed in the dissolved gas tank body 3, they are easily released quickly, thereby achieving the purpose of water purification. A third valve 18 is arranged at one end of the ejection pipe 17 connected to the dissolved gas tank body 3, which is used to balance the flow of multiple releasers 19, and a releaser 19 is arranged at one end connected to the flotation tank 4;

[0026] The flotation tank 4 is provided with a water level sensor 25 for detecting the upper liquid level in the tank, and is also equipped with a scraping assembly, a cleaning assembly and a stirring assembly; in the scraping assembly, a scraping plate 29 is located in the flotation tank 4 and above the water level sensor 25, spanning between the front and rear side walls of the flotation tank 4, and driven by a scraping drive mechanism to slide back and forth horizontally in the left and right directions in the tank. A debris discharge port 40 of the same height and size as the scraping plate 29 is provided on the right side of the flotation tank 4, and the scraping plate 29 can slide to the right to the debris discharge port 40, and the right side of the plate surface is adaptively exposed through the debris discharge port 40; in the cleaning assembly The cleaning box 30 is placed outside the right side of the flotation box 4, and the impurity discharge port 40 is surrounded inside. A pair of cleaning plates 33 driven by a cleaning drive mechanism and capable of sliding back and forth horizontally toward or away from each other in the front and rear directions are arranged inside the box. The left plate end of the cleaning plate 33 can contact the right plate surface of the scraping plate 29 exposed at the impurity discharge port 40, and the impurities on the right plate surface of the scraping plate 29 are cleaned by sliding; in the stirring assembly, a stirring blade 21 is provided at the bottom end of the electric telescopic rod 20 and is suspended in the flotation box 4, and the upper end is exposed above the flotation box 4 and is driven by the stirring drive mechanism to rotate.

[0027] In a specific implementation, the corresponding structural setting of the device also includes:

[0028] In the scraper assembly, the scraper drive mechanism includes a fixed base 26, a second motor 27, a screw 28 and a nut assembly. The screw 28 and the nut assembly and the second motor 27 are externally arranged at the rear end of the flotation tank 4 through the fixed base 26. The screw 28 is horizontally arranged in the left and right directions and can be rotated by the second motor 27. The nut is connected to the rear end of the scraper plate 29, and the scraper plate 29 can be slidably arranged between the front and rear side walls of the flotation tank 4.

[0029] In the debris cleaning component, the debris cleaning drive mechanism includes a guide column 31, a bidirectional screw 32, a connecting frame 34, a rotating shaft 35, a transmission belt 36, a first bevel gear 37, a third motor 38, and a second bevel gear 39. It is driven by the third motor 38 and is driven by the meshing second bevel gear 39 and the first bevel gear 37, driving the rotating shaft 35 coaxially connected with the first bevel gear 37 to rotate. The rotating shaft 35 is rotatably arranged on the connecting frame 34, and its two ends are respectively connected to the two ends of the bidirectional screw 32 through a transmission belt 36 to drive the bidirectional screw 32 to rotate. A pair of debris cleaning plates 33 are respectively connected to a pair of nuts sleeved on the bidirectional screw 32. The guide column 31 is a fixed component, which is horizontally arranged in the front-rear direction and passes through a pair of debris cleaning plates 33. The pair of debris cleaning plates 33 can slide along the guide column 31.

[0030] In the stirring assembly, the stirring drive mechanism includes a first motor 23, a first flat gear 22, and a second flat gear 24, which are integrally mounted on the top plate 5 at the upper end of the flotation tank 4, and are driven by the first motor 23. The second flat gear 24 is meshed with the first flat gear 22 to drive the electric telescopic rod 20 coaxially connected to the first flat gear 22 to rotate synchronously with the first flat gear 22.

[0031] The dissolved gas tank body 3 is filled with gas by a silent air compressor 6 through an air delivery component, and the air delivery component includes an air delivery pipe 8. The output end of the silent air compressor 6 is connected to the dissolved gas tank body 3 through the air delivery pipe 8. A pressure regulating valve 9 is provided at the end of the air delivery pipe 8 connected to the silent air compressor 6, which is convenient for adjusting the output pressure. An electromagnetic valve 10 is provided at the end connected to the dissolved gas tank body 3, which is convenient for adjusting the air intake in the dissolved gas tank body 3 so that the gas-water ratio in the dissolved gas tank body 3 can be kept stable. A gas flow meter 11 is also provided between the pressure regulating valve 9 and the electromagnetic valve 10.

[0032] The dissolved gas tank body 3 is filled with water by the pipeline pump 7 through the water delivery assembly. The water delivery assembly includes a drainage pipe 14 connected to the drainage port of the pipeline pump 7 and a water suction pipe 12 connected to the water suction port of the pipeline pump 7. The other end of the drainage pipe 14 is connected to the dissolved gas tank body 3. The end connected to the pipeline pump 7 is provided with a second valve 15. The end of the water suction pipe 12 connected to the pipeline pump 7 is provided with a first valve 13, and the other end is connected to the water outlet of the basket filter 16. The external water source is received through the water inlet of the basket filter 16, which effectively reduces the blockage of the water delivery assembly.

[0033] The top of the cleaning box 30 is open, which is convenient for timely cleaning.

[0034] Compared with the traditional method of stopping the machine and then manually removing impurities, this device has a certain self-cleaning function and is more advantageous in wastewater treatment. Its self-cleaning mainly includes:

[0035] First, use the scraping component to clean the impurities in the flotation box 4;

[0036] A water level sensor 25 is provided in the air flotation box 4 to detect the water level in the box in real time to prevent the water level from exceeding the upper liquid level. The scraper plate 29 of the scraper assembly is located above the water level sensor 25. Driven by the scraper drive mechanism, the scraper plate 29 can slide back and forth in the box along the left and right directions, so that the impurities quickly released into the box by the releaser 19 and slowly floating up are scraped off by the scraper plate 29, and the scraped impurities are discharged into the cleaning box 30 through the impurity discharge port 40;

[0037] Second, use the debris cleaning component to clean the scraping plate 29 of the scraping component;

[0038] When the scraper plate 29 slides to the debris discharge port 40, the pair of cleaning plates 33 can slide back and forth in the front and rear directions in the cleaning box 30 through the cleaning drive mechanism, and contact with the exposed right side of the scraper plate 29 during the sliding, so as to clean the residual impurities on the right side of the scraper plate 29;

[0039] Third, use the stirring component to assist in the cleaning of the scraping component;

[0040] The purpose of providing the stirring assembly is to form a vortex in the water in the flotation tank 4 through the extension and retraction of the telescopic electric telescopic rod 20 and the rotation of the stirring blade 21 carried by the electric telescopic rod 20, so as to concentrate the impurities and facilitate the centralized cleaning of the scraper plate 29.

[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high-efficiency dissolved air flotation device, characterized by: A dissolved air tank is set up on the front side of the upper end of the base, and an air flotation box is set up on the rear side. The dissolved air tank is filled with air by a silent air compressor through an air delivery component, and water is added by a pipeline pump through a water delivery component. The bottom is connected to the air flotation box at the bottom end of the air flotation box through multiple groups of spray pipes. A third valve is set at one end of the spray pipe connected to the dissolved air tank, and a releaser is set at one end connected to the air flotation box. The flotation tank is provided with a water level sensor for detecting the upper liquid level in the tank, and is also equipped with a scraping assembly, a cleaning assembly and a stirring assembly; in the scraping assembly, the scraping plate is located in the flotation tank, above the water level sensor, spanning between the front and rear side walls of the flotation tank, and driven by the scraping drive mechanism to slide back and forth horizontally in the left and right directions in the tank, and a debris discharge port with the same height and size as the scraping plate is provided on the right side of the flotation tank, and the scraping plate can slide to the right to the debris discharge port, and the right side of the plate surface is adaptively exposed through the debris discharge port; the cleaning assembly In the component, a cleaning box is arranged outside the right side of the air flotation box, and the impurity discharge port is arranged inside. A pair of cleaning plates driven by a cleaning drive mechanism and capable of horizontally reciprocating and sliding toward or away from each other in the front and rear directions are arranged inside the box. The left plate end of the cleaning plate can contact the right plate surface of the scraping plate exposed at the impurity discharge port, and the impurities on the right plate surface of the scraping plate are cleaned by sliding. In the stirring component, a stirring blade is arranged at the bottom end of the electric telescopic rod and is suspended in the air flotation box, and the upper end is exposed above the air flotation box and is driven by the stirring drive mechanism to rotate.

2. The high-efficiency dissolved air flotation device according to claim 1 is characterized in that: In the scraper assembly, the scraper drive mechanism includes a fixed seat, a second motor, and a screw-nut assembly. The screw-nut assembly and the second motor are externally arranged at the rear end of the flotation tank through the fixed seat. The screw is horizontally arranged in the left and right directions and can be rotated by the second motor. The nut is connected to the rear end of the scraper plate, and the scraper plate can be slidably arranged between the front and rear side walls of the flotation tank.

3. The high-efficiency dissolved air flotation device according to claim 1 is characterized in that: In the debris cleaning component, the debris cleaning driving mechanism includes a guide column, a bidirectional screw, a connecting frame, a rotating shaft, a transmission belt, a first bevel gear, a third motor, and a second bevel gear. The third motor drives the rotating shaft coaxially connected to the first bevel gear through the meshing second bevel gear and the first bevel gear, and the rotating shaft is driven to rotate. The rotating shaft is rotatably arranged on the connecting frame, and the two ends are respectively connected to the two ends of the bidirectional screw through the transmission belt to drive the bidirectional screw to rotate. A pair of debris cleaning plates are respectively connected to a pair of nuts sleeved on the bidirectional screw. The guide column is a fixed component, which is horizontally arranged in the front-rear direction and passes through a pair of debris cleaning plates. The pair of debris cleaning plates can slide along the guide column.

4. The high-efficiency dissolved air flotation device according to claim 1 is characterized in that: In the stirring assembly, the stirring drive mechanism includes a first motor, a first spur gear, and a second spur gear, which are integrally installed on the top plate at the upper end of the flotation tank and are driven by the first motor. The second spur gear is meshed with the first spur gear to drive the electric telescopic rod coaxially connected to the first spur gear to rotate synchronously with the first spur gear.

5. The high-efficiency dissolved air flotation device according to claim 1 is characterized in that: The dissolved gas tank body is filled with gas by a silent air compressor through an air delivery component, and the air delivery component includes an air delivery pipe. The output end of the silent air compressor is connected to the dissolved gas tank body through the air delivery pipe. A pressure regulating valve is provided at one end of the air delivery pipe connected to the silent air compressor, and an electromagnetic valve is provided at one end connected to the dissolved gas tank body. A gas flow meter is also provided between the pressure regulating valve and the electromagnetic valve.

6. The high-efficiency dissolved air flotation device according to claim 1 is characterized in that: The dissolved air tank body is filled with water by a pipeline pump through a water delivery assembly. The water delivery assembly includes a drainage pipe connected to the drainage port of the pipeline pump and a water suction pipe connected to the water suction port of the pipeline pump. The other end of the drainage pipe is connected to the dissolved air tank body, and a second valve is provided at one end connected to the pipeline pump. A first valve is provided at one end of the water suction pipe connected to the pipeline pump, and the other end is connected to the water outlet of the basket filter, and receives external water source through the water inlet of the basket filter.

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