Air floatation equipment for efficiently cleaning suspended matters and wastewater treatment system

Abstract

The invention discloses air floatation equipment capable of efficiently cleaning suspended matters and a wastewater treatment system. The air floatation equipment comprises a dissolved air water conveying mechanism, an air floatation tank arranged in an air floatation equipment body, a sewage conveying mechanism, a waste discharge conveying mechanism and the wastewater treatment system corresponding to the air floatation equipment, wherein the sewage conveying mechanism and the waste discharge conveying mechanism are respectively communicated and connected to the air floatation equipment body. The sewage treatment device is provided with the air floatation discharging and feeding structure which is communicated and connected, so that micro-bubbles around suspended matters are not easily damaged when sewage flows, the suspended matters can normally move upwards under the action of a large number of micro-bubbles, the suspended matters in the sewage can be fully collected, and the treatment efficiency is improved; moreover, waste residues and sewage can be further treated through the correspondingly arranged waste water treatment system, so that recycling and reusing are facilitated, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment equipment, in particular to an air flotation device and a wastewater treatment system for efficiently cleaning suspended matter. Background Art

[0002] Wastewater treatment is the process of purifying sewage so that it meets the water quality requirements for discharge into a water body or reuse. It is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, catering, etc., and is increasingly entering the daily lives of ordinary people.

[0003] According to the source of sewage, sewage treatment is generally divided into industrial sewage treatment and domestic sewage treatment. Industrial sewage includes industrial sewage, agricultural sewage and medical sewage, while domestic sewage is sewage generated in daily life. It refers to a complex mixture of various forms of inorganic and organic matter, including: floating and suspended solid particles of different sizes, colloidal and gelatinous diffusions and pure solutions. Or according to the nature of water pollution, there are two types of water pollution: one is natural pollution; the other is man-made pollution. Currently, man-made pollution poses the greatest threat to water bodies. Water pollution can be divided into three categories according to the different impurities: chemical pollution, physical pollution and biological pollution. The main pollutants are: (1) untreated industrial sewage; (2) untreated domestic sewage; (3) agricultural sewage from large amounts of fertilizers, pesticides and herbicides; (4) industrial waste and domestic garbage piled up by the river; (5) soil erosion; (6) mining sewage. There are many ways to treat sewage, which can generally be summarized as physical, chemical and biological methods.

[0004] In the process of urban sewage treatment, flotation is often used to treat slightly polluted water. The working principle of flotation is a solid-liquid and liquid-liquid separation process. It mainly uses the microbubbles in the dissolved air water generated by the dissolved air system to bond with the suspended flocs in the water, so that they adhere to the solid or liquid particles in the sewage with a density close to that of water, resulting in a state where the overall density is less than that of water, and relies on buoyancy to make the suspended matter rise to the water surface with the microbubbles, forming scum, so that the suspended flocs in the water are removed. The main steps are to first flocculate the debris in the sewage and then pass through the dissolved air zone, while the tiny bubbles in the dissolved air zone are adsorbed on the flocs and then driven to the surface of the treated water by buoyancy, and finally the scum is separated from the clean water by the scraping device to achieve water treatment of the sewage.

[0005] However, the existing flotation equipment easily destroys the microbubbles around the suspended matter when the sewage flows, so that the suspended matter cannot move upward normally and cannot be fully collected in the sewage. In response to this, we propose an air flotation equipment and wastewater treatment system for efficiently cleaning suspended matter to overcome the above problems. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention aims to provide an air flotation device and a wastewater treatment system for efficiently cleaning suspended matter.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: an air flotation device for efficiently cleaning suspended matter, including an air flotation device body, the air flotation device body including a grille, a sunshade, a dissolved air water conveying mechanism, a partition plate, an air flotation tank, a first drive shaft, a fixing pin, a first chain, a second chain, a second drive shaft, a drive motor, a motor frame, a sewage conveying mechanism and a waste discharge conveying mechanism, the grille is installed inside the air flotation device body, the sunshade is installed on the surface of the air flotation device body in the form of a rolling curtain, the dissolved air water conveying mechanism is connected to one side of the bottom corner of the air flotation device body, and the plurality of partition plates are fixed to the air flotation device body. The flotation tank is arranged inside the flotation equipment body, the first drive shaft and the second drive shaft are installed in sequence inside the flotation equipment body, the first chain and the second chain are respectively connected to the first drive shaft and the second drive shaft through gear transmission, the fixing pin is arranged at one end of the first drive shaft, the driving motor is fixed to the outer wall of the flotation equipment body through the motor frame, the output end of the driving motor is electrically connected to the second drive shaft, the scraper structure can be movably connected through the first chain and the second chain, and the sewage conveying mechanism and the waste conveying mechanism are respectively connected to the flotation equipment body.

[0008] As a further improvement of the above technical solution, a plurality of groups of upward conveying channels are defined on the flotation tank, and the conveying channels include a lower water tank, a connecting part and an upper water tank from bottom to top, and the connecting part connects the lower water tank and the upper water tank.

[0009] As a further improvement of the above technical solution, a dissolved air water inlet is provided on one side of the dissolved air water conveying mechanism, and the dissolved air water inlet is communicated with a lower water tank provided in the air flotation tank.

[0010] As a further improvement of the above technical solution, a sewage inlet is provided on one side of the sewage conveying mechanism, and the sewage inlet is connected to the upper water tank for conveying sewage to the lower water tank.

[0011] As a further improvement of the above technical solution, a waste outlet is provided on one side of the waste discharge and conveying mechanism, the waste outlet is connected to the upper water bin, and the projection of the connecting part along the vertical direction is separated from the projection of the waste outlet along the vertical direction.

[0012] As a further description of the above technical solution, the first drive shaft and the second drive shaft are set to the same model parameters, the first chain and the second chain are set to the same model parameters, and a plurality of mounting frames are fixed between a pair of the first chain and the second chain.

[0013] The present invention also provides a wastewater treatment system of an air flotation device for efficiently cleaning suspended solids. The wastewater treatment system comprises a sedimentation module, an air flotation module, a sewage anaerobic treatment module, an ultrafiltration membrane treatment module and a centralized recovery module which are connected in sequence.

[0014] Wherein, the precipitation module is used to precipitate and statically treat impurities;

[0015] Wherein, the air flotation module is used to separate and process the suspended flocs in the scum;

[0016] The sewage anaerobic treatment module is used to concentrate and disinfect the sewage, and dehydrate the output to obtain impurities and water.

[0017] Wherein, the ultrafiltration membrane treatment module is used for fine treatment of sewage;

[0018] Wherein, the centralized recovery module is used for recycling recycled water.

[0019] In order to further improve the usability of the wastewater treatment system of the flotation equipment for efficiently cleaning suspended matter, the present invention adopts a solution that the sedimentation module is used to maintain a reflux ratio of sludge returning to the sewage anaerobic treatment module of 150% to 280%.

[0020] In order to further improve the ease of use of the wastewater treatment system of the flotation equipment for efficiently cleaning suspended matter, the present invention adopts a solution: the ultrafiltration membrane treatment module is used to remove fine suspended matter, fine sludge and some difficult-to-degrade organic particles in the sewage passing through the sewage anaerobic treatment module until the total concentration of solid particles in the sewage is less than 20 mg / L.

[0021] In order to further improve the ease of use of the wastewater treatment system of the flotation equipment for efficiently cleaning suspended matter, the solution adopted by the present invention is: the centralized recovery module includes a heating unit, a cooling unit and a heat energy recovery unit, the heating unit is used for heating treatment of recycled water, the cooling unit is used for cooling treatment of the recycled water, and the heat energy recovery unit is used for recycling and reusing the waste energy generated by the centralized recovery module.

[0022] The beneficial effects of the present invention are as follows: the air flotation equipment for efficiently cleaning suspended matter is provided with a connected air flotation discharge inlet structure, so that the microbubbles around the suspended matter are not easily destroyed when the sewage flows, so that the suspended matter can move upward normally under the action of a large number of microbubbles, and then the suspended matter in the wastewater can be fully collected, thereby improving the treatment efficiency; moreover, the waste residue and sewage can be further treated through the corresponding wastewater treatment system for recycling and reuse, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an air flotation device for efficiently cleaning suspended matter according to the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of an air flotation device for efficiently cleaning suspended matter according to the present invention;

[0025] Figure 3 It is a framework diagram of the wastewater treatment system of the present invention.

[0026] In the figure: 1 air flotation equipment body, 2 grille, 3 sunshade, 4 dissolved air and water conveying mechanism, 5 partition plate, 6 air flotation tank, 7 first drive shaft, 8 fixing pin, 9 first chain, 10 second chain, 11 second drive shaft, 12 drive motor, 13 motor frame, 14 sewage conveying mechanism, 15 waste discharge conveying mechanism. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-2 , an air flotation device and wastewater treatment system for efficiently cleaning suspended matter, comprising an air flotation device body 1, the air flotation device body 1 comprising a grille 2, a sunshade 3, a dissolved air water conveying mechanism 4, a partition plate 5, an air flotation pool 6, a first drive shaft 7, a fixing pin 8, a first chain 9, a second chain 10, a second drive shaft 11, a drive motor 12, a motor frame 13, a sewage conveying mechanism 14 and a waste discharge conveying mechanism 15, the grille 2 is installed inside the air flotation device body 1, the sunshade 3 is installed on the surface of the air flotation device body 1 in the form of a rolling curtain, the dissolved air water conveying mechanism 4 is connected to one side of the bottom corner of the air flotation device body 1, and the plurality of partition plates 5 are fixed inside the air flotation device body 1 and away from its water inlet end.

[0029] In the present invention: the flotation pool 6 is arranged inside the flotation equipment body 1, the first drive shaft 7 and the second drive shaft 11 are installed inside the flotation equipment body 1 in sequence, the first chain 9 and the second chain 10 are respectively connected to the first drive shaft 7 and the second drive shaft 11 through gear transmission, the fixing pin 8 is arranged at one end of the first drive shaft 7, the drive motor 12 is fixed to the outer wall of the flotation equipment body 1 through the motor frame 13, the output end of the drive motor 12 is electrically connected to the second drive shaft 11, the scraper structure can be movably connected through the first chain 9 and the second chain 10, and the sewage conveying mechanism 14 and the waste conveying mechanism 15 are respectively connected to the flotation equipment body 1.

[0030] Preferably, the flotation tank 6 is defined with a plurality of groups of upward conveying channels, and the conveying channels include a lower water tank, a connecting portion and an upper water tank from bottom to top, and the connecting portion connects the lower water tank and the upper water tank.

[0031] Preferably, a dissolved air water inlet is provided on one side of the dissolved air water conveying mechanism 4 , and the dissolved air water inlet is communicated with a lower water tank provided in the air flotation tank 6 .

[0032] Preferably, a sewage inlet is provided on one side of the sewage conveying mechanism 14, and the sewage inlet is connected to the upper water tank for conveying sewage to the lower water tank.

[0033] Preferably, a waste outlet is provided on one side of the waste discharge and conveying mechanism 15, the waste outlet is connected to the upper water bin, and the projection of the connecting portion along the vertical direction is separated from the projection of the waste outlet along the vertical direction.

[0034] Preferably, the first drive shaft 7 and the second drive shaft 11 are set to the same model parameters, the first chain 9 and the second chain 10 are set to the same model parameters, and a plurality of mounting frames are fixed between a pair of the first chain 9 and the second chain 10.

[0035] The working principle of the present invention is: when in use, wastewater and waste are input into the flotation tank 6 through the dissolved air water conveying mechanism 4, and the wastewater and waste are sequentially conveyed to the lower water tank or the upper water tank through a plurality of groups of upward conveying channels defined on the flotation tank 6. The waste outlet is connected to the upper water tank, and the projection of the connecting part along the vertical direction is separated from the projection of the waste outlet along the vertical direction to achieve waste separation; the sewage is conveyed to the lower water tank through the sewage inlet of the sewage conveying mechanism 14, and finally filtered and purified by the wastewater treatment system.

[0036] The invention discloses a wastewater treatment system of an air flotation device for efficiently cleaning suspended matter. The wastewater treatment system comprises a sedimentation module, an air flotation module, a sewage anaerobic treatment module, an ultrafiltration membrane treatment module and a centralized recovery module which are connected in sequence.

[0037] Specifically, the precipitation module is used to perform precipitation and static treatment on impurities;

[0038] Specifically, the air flotation module is used to separate and process the suspended flocs in the scum;

[0039] Specifically, the sewage anaerobic treatment module is used to perform concentration treatment and anaerobic disinfection treatment on the sewage, and dehydrate the output to obtain impurities and water;

[0040] Specifically, the ultrafiltration membrane treatment module is used for fine treatment of sewage;

[0041] Specifically, the centralized recovery module is used for recycling recycled water.

[0042] Furthermore, the sedimentation module is used to maintain a return ratio of sludge returning to the sewage anaerobic treatment module of 150% to 280%.

[0043] Furthermore, the ultrafiltration membrane treatment module is used to remove fine suspended matter, fine sludge and some difficult-to-degrade organic particles in the sewage passing through the sewage anaerobic treatment module until the total concentration of solid particles in the sewage is less than 20 mg / L, thereby providing purification efficiency.

[0044] Furthermore, the centralized recovery module includes a heating unit, a cooling unit and a heat recovery unit. The heating unit is used for heating the recycled water, the cooling unit is used for cooling the recycled water, and the heat recovery unit is used for recycling and reusing the waste energy generated by the centralized recovery module to save heat energy.

[0045] The present invention is provided with a connected air flotation discharge inlet structure, so that the sewage is not easy to destroy the microbubbles around the suspended matter when flowing, so that the suspended matter can move upward normally under the action of a large number of microbubbles, and then the suspended matter in the wastewater can be fully collected, thereby improving the treatment efficiency; moreover, the waste residue and sewage can be further treated by the wastewater treatment system for recycling and reuse, saving costs.

[0046] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air flotation device for efficiently cleaning suspended matter, comprising an air flotation device body (1), the air flotation device body (1) comprising a grille (2), a sunshade (3), a dissolved air water conveying mechanism (4), a partition plate (5), an air flotation tank (6), a first drive shaft (7), a fixing pin (8), a first chain (9), a second chain (10), a second drive shaft (11), a drive motor (12), a motor frame (13), a sewage conveying mechanism (14) and a waste discharge conveying mechanism (15), the grille (2) being installed inside the air flotation device body (1), the sunshade (3) being installed on the surface of the air flotation device body (1) in the form of a rolling curtain, the dissolved air water conveying mechanism (4) being connected to one side of the bottom corner of the air flotation device body (1), the plurality of partition plates (5) being fixed inside the air flotation device body (1) and away from its water inlet end, characterized in that: The flotation pool (6) is arranged inside the flotation equipment body (1); the first drive shaft (7) and the second drive shaft (11) are sequentially installed inside the flotation equipment body (1); the first chain (9) and the second chain (10) are respectively connected to the first drive shaft (7) and the second drive shaft (11) through gear transmission; the fixing pin (8) is arranged at one end of the first drive shaft (7); the driving motor (12) is fixed to the outer wall of the flotation equipment body (1) through a motor frame (13); the output end of the driving motor (12) is electrically connected to the second drive shaft (11); the scraper structure can be movably connected through the first chain (9) and the second chain (10); the sewage conveying mechanism (14) and the waste discharge conveying mechanism (15) are respectively connected to the flotation equipment body (1).

2. The air flotation device for efficiently cleaning suspended matter according to claim 1, characterized in that: The flotation tank (6) is defined with a plurality of groups of upward conveying channels, the conveying channels comprising, from bottom to top, a lower water tank, a connecting portion and an upper water tank, the connecting portion connecting the lower water tank and the upper water tank.

3. The air flotation device for efficiently cleaning suspended matter according to claim 1 is characterized in that: A dissolved air water inlet is provided on one side of the dissolved air water conveying mechanism (4), and the dissolved air water inlet is connected to a lower water tank provided in the air flotation tank (6).

4. The air flotation device for efficiently cleaning suspended matter according to claim 1 is characterized in that: A sewage inlet is provided on one side of the sewage conveying mechanism (14), and the sewage inlet is connected to the upper water tank and is used to convey sewage to the lower water tank.

5. The air flotation device for efficiently cleaning suspended matter according to claim 1 is characterized in that: A waste outlet is provided on one side of the waste discharge and conveying mechanism (15), the waste outlet is connected to the upper water tank, and the projection of the communication portion along the vertical direction is separated from the projection of the waste outlet along the vertical direction.

6. The air flotation device for efficiently cleaning suspended matter according to claim 1, characterized in that: The first drive shaft (7) and the second drive shaft (11) are set to have the same model parameters, the first chain (9) and the second chain (10) are set to have the same model parameters, and a plurality of mounting frames are fixed between a pair of the first chain (9) and the second chain (10).

7. The wastewater treatment system of the air flotation equipment for efficiently cleaning suspended matter according to claim 1 is characterized by: The wastewater treatment system comprises a sedimentation module, an air flotation module, a sewage anaerobic treatment module, an ultrafiltration membrane treatment module and a centralized recovery module which are connected in sequence; Wherein, the precipitation module is used to perform precipitation and static treatment on impurities; The air flotation module is used to separate the suspended flocs in the scum; The sewage anaerobic treatment module is used to perform concentration treatment and anaerobic disinfection treatment on the sewage, and dehydrate the output material to obtain impurities and water; The ultrafiltration membrane treatment module is used for fine treatment of sewage; The centralized recovery module is used for recycling recycled water.

8. The wastewater treatment system of the air flotation equipment for efficiently cleaning suspended matter according to claim 7 is characterized by: The sedimentation module is used to maintain the return ratio of the sludge to the sewage anaerobic treatment module at 150% to 280%.

9. The wastewater treatment system of the air flotation equipment for efficiently cleaning suspended matter according to claim 7, characterized in that: The ultrafiltration membrane treatment module is used to remove fine suspended matter, fine sludge and some difficult-to-degrade organic particles in the sewage that has passed through the sewage anaerobic treatment module until the total concentration of solid particles in the sewage is less than 20 mg / L.

10. The wastewater treatment system of the air flotation equipment for efficiently cleaning suspended matter according to claim 7, characterized in that: The centralized recovery module includes a heating unit, a cooling unit and a heat recovery unit. The heating unit is used for heating the recycled water, the cooling unit is used for cooling the recycled water, and the heat recovery unit is used for recovering and reusing the surplus energy generated by the centralized recovery module.

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