Multi-vortex efficient air flotation treatment device

Abstract

The utility model relates to a multi-vortex efficient air floatation treatment device, which relates to the technical field of sewage treatment, and comprises a bubble generation system, a three-phase vortex mixing system, a buffer pool, a reaction pool and an air floatation pool, the bubble generation system inputs a water body with bubbles into the three-phase vortex mixing system; the three-phase vortex mixing system is connected with the water inlet end of the device and the output end of the bubble generation system and is used for carrying out three-phase vortex mixing on the sewage to generate a flocculating constituent; and the reaction tank is connected with the output end of the three-phase eddy current mixing system. According to the air floatation treatment device provided by the invention, a solid-liquid-gas three-state mixture is formed under a high-pressure state, and the formed floc is high in solid content and relatively low in water content, so that the floc can be quickly floated and separated, and the solid-liquid separation efficiency in wastewater is improved.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and particularly to a multi-vortex high-efficiency air flotation treatment device. Background Art

[0002] In daily life and production, high-concentration wastewater is often generated. This type of wastewater usually has a high salt content, a large amount of organic matter, a high content of suspended solids, etc., and the water quality components are complex. Such high-concentration wastewater causes greater pollution to the environment and has a long-lasting impact. If not properly treated, it will not only damage the ecological environment but also harm humans themselves. Moreover, people's awareness of environmental protection is constantly increasing, and the country also pays increasing attention to environmental issues. The water quality requirements for wastewater discharge are more stringent than before. Therefore, it is particularly important to select a suitable and reasonable method and solution for treatment to make the wastewater quality meet the specified discharge standards, and the treatment technology method is crucial.

[0003] Since this type of wastewater cannot be directly subjected to biochemical treatment, in the actual wastewater treatment process, especially for wastewater with a high content of pollutants such as suspended solids and oil, pretreatment is first required. For this, air flotation treatment technology is widely used. Its principle is to add a flocculant to the wastewater to make it evenly mixed with the wastewater, and then use highly dispersed microbubbles as carriers to adhere to the pollutants in the wastewater, so that their buoyancy is greater than the gravity and the upward floating resistance, so that the pollutants float to the water surface to form foam, and then the foam is scraped off by a slag scraping device to achieve solid-liquid or liquid-liquid separation, so as to achieve the purpose of water purification.

[0004] However, the existing air flotation equipment still has the following problems. First, most of them use mechanical stirring for the flocculation reaction. Second, the dissolution efficiency of the microbubbles generated by traditional dissolved air flotation is low. When performing solid-liquid separation, the rising speed of the bubbles is slow, resulting in low working efficiency of the entire purification system. Summary of the Utility Model

[0005] To solve the above technical problems, this application provides a multi-vortex high-efficiency air flotation treatment device, adopting the following technical solutions:

[0006] A multi-vortex high-efficiency air flotation treatment device includes a bubble generation system, a buffer tank, a reaction tank, an air flotation tank, and an effluent tank; the buffer tank, the reaction tank, the air flotation tank, and the effluent tank are connected in sequence. A three-phase vortex mixing system is provided at the air flotation tank. The bubble generation system is connected to the three-phase vortex mixing system. The bubble generation system is used to input a water body with bubbles into the three-phase vortex mixing system. The three-phase vortex mixing system is connected to an inlet water system, and the reaction tank is connected to the output end of the three-phase vortex mixing system.

[0007] By adopting the above technical solution, compressed air can be dissolved in water through a bubble generation system, and then the water dissolved with air is transported into a three-phase vortex mixing system. At the same time, wastewater is input into the three-phase vortex mixing system through a water inlet system for three-phase vortex reaction to form flocs of three-phase mixture.

[0008] Subsequently, the formed flocs of three-phase mixture then enter the reaction tank and are mixed and released simultaneously with part of the wastewater from the water inlet system. At this time, the dissolved gas in the flocs is released and rapidly expands and rises, driving pollutants such as suspended solids and oils in the water to float. The floating flocs continue to grow and have a low moisture content, greatly improving the removal effect while reducing the sludge production compared with traditional air flotation equipment. Subsequently, the wastewater then enters the air flotation tank, and substances such as suspended solids and oils in the wastewater float above the tank body and are separated. The separated wastewater enters the outlet tank through the outlet pipe and is discharged.

[0009] Therefore, in this application, by setting a multi-vortex three-phase mixing system, the number of dissolved bubbles in the flocs can be more, which can carry more pollutants to float. At the same time, the increase in pressure makes the separation speed more rapid, thereby improving the separation effect of the entire device and enhancing the purification effect of the wastewater.

[0010] Optionally, the bubble generation system includes a dissolved air pump, a compressor and a gas-liquid mixing device; the input end of the dissolved air pump is connected to the outlet tank, the input end of the gas-liquid mixing device is connected to both the output end of the dissolved air pump and the output end of the compressor, and the output end of the gas-liquid mixing device is connected to the three-phase vortex mixing system.

[0011] By adopting the above technical solution, the external water can be pumped into the gas-liquid mixing device through the dissolved air pump, and gas-liquid mixing occurs in the mixing device.

[0012] Optionally, the water inlet system includes a first water inlet pipe and a second water inlet pipe. The first water inlet pipe is connected to the input end of the three-phase vortex mixing system, and the second water inlet pipe is connected to the buffer tank.

[0013] By adopting the above technical solution, wastewater can be transported into the three-phase vortex mixing system through the first water inlet pipe, and wastewater can be transported into the buffer tank through the second water inlet pipe.

[0014] Optionally, a stirring device is arranged in the buffer tank, an outlet pipe is connected to the outlet tank, and a sleeve valve for adjusting the water output of the outlet tank is arranged above the outlet tank.

[0015] By adopting the above technical solution, the water in the buffer tank can be stirred by the stirring device to reduce the sedimentation and accumulation of suspended solids.

[0016] Optionally, a slag scraping system for removing the floating slag in the air flotation tank is arranged above the air flotation tank.

[0017] By adopting the above technical solution, the scum on the air flotation tank can be collected and centralized through the slag discharge system.

[0018] Optionally, a scum trough is provided in the air flotation tank, and a slag discharge port is provided on the scum trough.

[0019] By adopting the above technical solution, the scum removed by the scum scraping system can be temporarily collected through the scum trough, and the scum trough can be regularly cleaned through the slag discharge port.

[0020] Optionally, a sludge hopper is provided at the lower end of the air flotation tank, and a sludge discharge port for discharging the deposited sludge is provided at the lower end of the sludge hopper.

[0021] By adopting the above technical solution, the sludge accumulated in the air flotation tank can be centralized by setting the sludge hopper, and can be regularly cleaned through the sludge discharge port.

[0022] By adopting the above technical solution, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The setting of the three-phase eddy current reaction system makes the mixing of wastewater and compressed air more sufficient, the flocculation reaction more stable and reliable, the bubbles expand rapidly after release, and the bubbles attached with solid pollutants are pushed to rise rapidly, forming suspended sludge with a higher solid content rate, and the purification efficiency is greatly improved;

[0024] 2. The setting of the multi-eddy current reaction system enhances the mutual restraint ability of the eddy current reaction system after release, and has a higher removal efficiency for impurities;

[0025] 3. The setting of the buffer tank can reduce the impact of large fluctuations in water volume and water quality on the air flotation system during actual operation, flexibly allocate the inlet water ratio, and ensure the stability and reliability of the entire air flotation device;

[0026] 4. The setting of the outlet sleeve valve can adjust the outlet water flow rate, thereby controlling the reaction time of the entire system, further simplifying the later operation management, and improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a multi-eddy current high-efficiency air flotation treatment device in the embodiment;

[0028] Figure 2 It is a schematic diagram of the structure of an operation platform of a multi-eddy current high-efficiency air flotation treatment device in the embodiment.

[0029] In the figure, 1 is a buffer pool; 2 is a reaction pool; 3 is a flotation tank; 4 is an effluent tank; 5 is an effluent sleeve valve; 6 is an effluent pipe; 7 is a three-phase eddy current mixing system; 71 is the output end of the three-phase eddy current mixing system; 8 is a bubble generation system; 81 is a dissolved air pump; 82 is a compressor; 83 is a gas-liquid mixing device; 831 is the output end of the bubble generation system; 9 is an inlet water system; 91 is a first inlet water pipe; 92 is a second inlet water pipe; 10 is a stirring device; 11 is a slag scraping system; 12 is a scum trough; 13 is a slag discharge port; 14 is a sludge hopper; 15 is a sludge discharge port; 16 is an operation platform. Detailed implementation mode

[0030] Referring to Figure 1 , an embodiment of the present application discloses a multi-eddy current high-efficiency flotation treatment device, including a buffer pool 1, a reaction pool 2, a flotation tank 3, and an effluent tank 4. The buffer pool 1, the reaction pool 2, the flotation tank 3, and the effluent tank 4 are connected in sequence.

[0031] A stirring device 10 is arranged in the buffer pool 1. The stirring device 10 is any device that can actively stir the water flow. In this embodiment, the stirring device 10 is composed of a stirring motor and an impeller fixedly connected to the output shaft of the stirring motor. An effluent pipe 6 is communicated with the effluent tank 4, and a sleeve valve for adjusting the water output of the effluent tank 4 is arranged above the effluent tank 4.

[0032] Referring to Figure 1 and Figure 2 , a bubble generation system 8 and an operation platform 16 are arranged on one side of the flotation tank 3. The bubble generation system 8 includes a dissolved air pump 81, a compressor 82, and a gas-liquid mixing device 83. The gas-liquid mixing device 83 is any chamber for mixing gas and liquid. The input end of the dissolved air pump 81 is connected to the bottom of the effluent tank 4, and the input end of the gas-liquid mixing device 83 is communicated with the output end of the dissolved air pump 81 and the output end of the compressor 82. The side of the gas-liquid mixing device 83 away from the dissolved air pump 81 is the output end 831 of the bubble generation system.

[0033] The output end of the gas-liquid mixing device 83 is communicated with a three-phase eddy current mixing system 7. The bubble generation system 8 is used to input a water body with bubbles into the three-phase eddy current mixing system 7. Specifically, in the dissolved air pump 81 and the compressor 82, the compressed air in the gas-liquid mixing device 83 is dissolved in the water source, so that the air dissolved in the water source forms bubbles, and then the water dissolved with bubbles enters the three-phase eddy current mixing system 7 for eddy current reaction.

[0034] The three-phase eddy current mixing system 7 is placed on the air flotation tank 3. In order to make the water distribution of the system uniform and the reaction more sufficient, in this embodiment, the three-phase eddy current mixing system 7 is set as two groups and the two groups of three-phase eddy current mixing systems 7 are arranged in parallel. The three-phase eddy current mixing system 7 in this embodiment is a three-phase eddy current mixer, which generally includes a reactor. The lower end of the reactor is connected with a releaser, and the releaser is the output end 71 of the three-phase eddy current mixing system. The releaser is placed inside the reaction tank 2. A plurality of cuts are arranged inside the reactor, and at the same time, a spiral structure and a layered structure are added to form a vortex flow field, increasing the intensity and stability of the eddy current; in the reactor, the reactants collide in the form of fine particles. Under the action of the eddy current, these particles begin to aggregate and settle, gradually forming large flocs. The eddy current reactor cleverly utilizes the flow field of the eddy current, enhances the aggregation force, inhibits the action of the dispersion force, and thus promotes the smooth progress of the flocculation reaction. When reaching the release port of the output end 71 of the three-phase eddy current mixing system, the dissolved air bubbles are quickly released and grow, driving the pollutant flocs to float up and separate quickly.

[0035] The output end 71 of the three-phase eddy current mixing system is connected with the reactor in the three-phase eddy current mixing system 7. The catalyst such as additives and liquid medicines can be directly added into the buffer tank 1, or the catalyst such as additives and liquid medicines can be actively added into the reactor in the three-phase eddy current mixing system 7 to improve the water purification capacity of this system, so that the catalyst such as additives and liquid medicines is mixed with the water body, saving the process of stirring and dissolving again, and having the effect of energy saving.

[0036] The three-phase eddy current mixing system 7 is connected with a water inlet system 9. The water inlet system 9 includes a first water inlet pipe 91 and a second water inlet pipe 92. The first water inlet pipe 91 corresponds to the three-phase eddy current mixing system 7 one by one and the first water inlet pipe 91 is connected with the input end of the three-phase eddy current mixing system 7, and the second water inlet pipe 92 is connected with the upper part of the buffer tank 1.

[0037] Thus, the wastewater can be conveyed into the three-phase eddy current mixing system 7 through the first water inlet pipe 91, and the wastewater can be conveyed into the buffer tank 1 through the second water inlet pipe 92.

[0038] A slag scraping system 11 for removing the floating slag on the air flotation tank 3 is arranged above the air flotation tank 3. The slag scraping system 11 in this embodiment is composed of a driving motor, two sprockets, a chain sleeved on the two sprockets, and a rubber scraper fixedly connected to the chain. A floating slag tank 12 is arranged in the air flotation tank 3. The floating slag tank 12 is placed below the slag scraping system 11, and a slag discharge port 13 is opened on the side wall of the bottom of the floating slag tank 12.

[0039] Thus, through the driving motor, the sprockets can drive the chain to rotate, and then the rubber scraper moves together with the chain, so that the floating slag suspended on the liquid surface of the air flotation tank 3 moves to one side of the floating slag tank 12, and the floating slag on the air flotation tank 3 is collected and concentrated through the floating slag tank 12.

[0040] A sludge hopper 14 is provided at the lower end of the air flotation tank 3. There are two sludge hoppers 14, and the lower ends of the sludge hoppers 14 gradually contract and are provided with sludge discharge ports 15 for discharging the deposited sludge.

[0041] The implementation principle of a multi-vortex high-efficiency air flotation treatment device according to an embodiment of the present application is as follows: Compressed air is dissolved in water through a bubble generation system 8 and then transported to a three-phase vortex mixing system 7. At the same time, wastewater is input into the three-phase vortex mixing system 7 through a first water inlet pipe 91 to form a flocculant mixed with three phases. And there are a large number of dissolved bubbles in the flocculant, which can carry more pollutants to float. At the same time, the increase in pressure makes the separation speed more rapid. Then it enters the reaction tank 2 and is mixed and released simultaneously with part of the wastewater from a second water inlet pipe 92. At this time, the dissolved air in the flocculant is released and rapidly expands and rises, driving pollutants such as suspended solids and oil in the water to float. The floating flocculant continuously grows and has a low water content, greatly improving the removal effect compared with traditional air flotation equipment while reducing the sludge production.

[0042] Subsequently, the wastewater then enters the air flotation tank 3. Substances such as suspended solids and oil in the wastewater float above the tank body and are scraped into the scum trough 12 by a scum scraping system 11 and then discharged outside. The separated wastewater enters the water outlet tank 4 through a water outlet pipe 6 and is discharged.

[0043] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-vortex high-efficiency flotation treatment device, characterized in that: The invention comprises a bubble generating system (8), a buffer tank (1), a reaction tank (2), an air flotation tank (3), and a water outlet tank (4); the buffer tank (1), the reaction tank (2), the air flotation tank (3), and the water outlet tank (4) are connected in sequence; a three-phase vortex mixing system (7) is provided at the air flotation tank (3); the bubble generating system (8) is connected to the three-phase vortex mixing system (7); the bubble generating system (8) is used to input water containing bubbles into the three-phase vortex mixing system (7); the three-phase vortex mixing system (7) is connected to a water inlet system (9); and the reaction tank (2) is connected to an output end (71) of the three-phase vortex mixing system.

2. A multi-vortex high-efficiency flotation treatment device according to claim 1, characterized in that: The bubble generating system (8) comprises an air dissolving pump (81), a compressor (82) and a gas-liquid mixing device (83); the input end of the air dissolving pump (81) is connected to the water outlet pool (4), the input end of the gas-liquid mixing device (83) is connected to both the output end of the air dissolving pump (81) and the output end of the compressor (82), and the output end of the gas-liquid mixing device (83) is connected to the three-phase vortex mixing system (7).

3. The multi-vortex high-efficiency flotation treatment device according to claim 1, characterized in that: The water inlet system (9) comprises a first water inlet pipe (91) and a second water inlet pipe (92); the first water inlet pipe (91) is connected to an input end of the three-phase vortex mixing system (7); and the second water inlet pipe (92) is connected to the buffer tank (1).

4. A multi-vortex high-efficiency flotation treatment device according to claim 3, characterized in that: The three-phase vortex mixing system (7) is provided in at least two groups, and the two groups of the three-phase vortex mixing system (7) are connected in parallel.

5. The multi-vortex high-efficiency flotation treatment device according to claim 1, characterized in that: The buffer tank (1) is provided with a stirring device (10), the water outlet tank (4) is connected with a water outlet pipe (6), and a sleeve valve (5) for adjusting the water outlet volume of the water outlet tank (4) is provided above the water outlet tank (4).

6. The multi-vortex high-efficiency flotation treatment device according to claim 1, characterized in that: A scraping system (11) for removing scum on the flotation tank (3) is provided above the flotation tank (3).

7. The multi-vortex high-efficiency flotation treatment device according to claim 6, characterized in that: A slag trough (12) is provided in the air flotation tank (3), and a slag discharge port (13) is provided on the slag trough.

8. The multi-vortex high-efficiency flotation treatment device according to claim 1, characterized in that: A mud hopper (14) is provided at the lower end of the air flotation tank (3), and a mud discharge port (15) for discharging deposited mud is provided at the lower end of the mud hopper (14).

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