CNDAF type super-efficiency nano dissolved air flotation machine

Abstract

The utility model relates to the technical field of sewage treatment equipment, in particular to a CNDAF type super-effect nano dissolved air flotation machine, which comprises an air flotation mechanism, a sewage treatment tank, an agent tank and a sludge treatment mechanism, and is characterized in that the air flotation mechanism is fixedly arranged on one side of the sewage treatment tank, the agent tank is positioned on the other side of the sewage treatment tank, and the sludge treatment mechanism is fixedly arranged on the other side of the sewage treatment tank. The sludge treatment mechanism is integrally mounted in the sewage treatment tank; by arranging the bearing side plate, the servo motor, the double-end worm, the worm gear, the auger and other components, through coaxial connection of the servo motor and the double-end worm and the meshing transmission relation of the double-end worm and the worm gear, the auger can be driven by the worm gear to rotate. And the device can push the sludge settled at the bottom of the sewage treatment tank through rotation of the auger, and transports the sludge to a specific position in a centralized manner, so that subsequent treatment of the screened sludge is facilitated, and the effect of improving the sludge treatment efficiency is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment equipment technical field, especially CNDAF type super-efficient nanometer dissolved air flotation machine. BACKGROUND

[0002] In the solid-liquid separation and liquid-liquid separation scene of sewage treatment, air flotation technology is widely used. The traditional air flotation equipment has obvious limitations: the air distribution air flotation is not fully pulverized, the bubble size is large (not less than 0.1mm), which leads to low removal efficiency and low sludge content; electrolytic air flotation can achieve separation, but the one-time investment is high and the plate life is short; although the dissolved air flotation process is relatively simple, there is still room for improvement in the dissolved air efficiency and comprehensive treatment efficiency. With the increasingly stringent environmental protection standards, sewage treatment puts forward higher requirements on the treatment efficiency, stability, operation cost and sludge treatment capacity of the equipment, and the existing air flotation equipment is difficult to fully meet the needs in dealing with complex water quality, efficient separation and sludge collection and treatment.

[0003] With the acceleration of industrialization and urbanization, sewage treatment technology is facing the urgent needs of high efficiency, energy saving and intelligentization. As a common sewage treatment method, the core of dissolved air flotation technology is to adsorb pollutants by micro-nano bubbles and realize solid-liquid separation.

[0004] For the related technology in the above, the inventors found that there are the following defects: the sludge treatment is not complete: the sludge collection and treatment link of the traditional air flotation equipment is usually independently set, which has complex structure and large floor area, and at the same time, the sludge conveying process is easy to be blocked or residual, which affects the overall treatment efficiency; the mixed reagent is not uniform: the mixing effect of flocculating agent and sewage directly affects the air flotation effect, but the mixing structure design of the traditional equipment is unreasonable, which leads to insufficient formation of flocculating material and reduces the removal rate of pollutants. CONTENT OF THE INVENTION

[0005] In order to solve the problems mentioned in the above background art, the present application provides CNDAF type super-efficient nanometer dissolved air flotation machine.

[0006] The CNDAF type super-efficient nanometer dissolved air flotation machine provided by the present application adopts the following technical scheme: the CNDAF type super-efficient nanometer dissolved air flotation machine comprises an air flotation mechanism, a sewage treatment tank, a reagent tank and a sludge treatment mechanism, characterized in that: the air flotation mechanism is fixedly arranged on one side of the sewage treatment tank, the reagent tank is located on the other side of the sewage treatment tank, and the sludge treatment mechanism is integrally installed in the sewage treatment tank.

[0007] The sludge treatment mechanism comprises bearing side plates, a servo motor, a double-end worm, a worm wheel, an auger and sludge guide blocks, the bearing side plates are symmetrically fixedly installed on the inner walls of the left and right sides of a sewage treatment tank, the servo motor is fixedly installed on the outer side of the bearing side plates, the double-end worm is coaxially connected with the output shaft of the servo motor, the worm wheel is in meshing transmission with the double-end worm, the auger is fixedly connected to the central axis of the worm wheel, and the sludge guide blocks are symmetrically and obliquely arranged on the inner walls of the left and right sides of the sewage treatment tank and located at the left and right ends of the auger.

[0008] Through the above scheme, the worm and worm wheel transmission cooperates with the bidirectional auger structure to realize efficient sludge pushing and directional collection, reduce mechanical energy consumption and prevent blockage.

[0009] Optionally, the air flotation mechanism comprises an air compressor, a high-pressure pump, an air storage tank, a gas dissolving tank, an equal pressure cavity shell and a releaser, the air compressor is communicated with the air storage tank and the gas dissolving tank through pipelines respectively, the high-pressure pump is fixedly installed on the top of the air compressor, the water outlet thereof is connected to the water inlet of the air storage tank through a pipeline for pumping the water in the air flotation separation zone of the sewage treatment tank into the air storage tank, the gas inlet of the gas dissolving tank is communicated with the equal pressure cavity shell, and the equal pressure cavity shell is uniformly provided with a plurality of releasers on the top thereof for releasing micro-nano bubbles into the sewage treatment tank.

[0010] Through the above scheme, the high-density nano bubble group is generated through the multi-stage pressure control and micro-hole release technology, and the pollutant floating separation efficiency is significantly improved.

[0011] Optionally, the sludge treatment mechanism further comprises a medicament mixing cavity top cover, a flow guide side plate, a partition plate, a sludge collection pipe and a sludge negative pressure tank, the medicament mixing cavity top cover is fixedly covered on the top of the sludge guide block, the flow guide side plate is obliquely arranged above the medicament mixing cavity top cover, and the partition plate is vertically fixed in the sewage treatment tank and divides the tank body into a central air flotation zone and two sludge collection zones; a stirrer is installed on the top of the medicament mixing cavity top cover for mixing the sewage and flocculating substances between the releaser and the equal pressure cavity shell; and one end of the sludge collection pipe is communicated with the sludge collection zone and the other end is connected to the sludge negative pressure tank.

[0012] Through the above scheme, the dynamic stirring and negative pressure collection are synergistically used to strengthen the flocculation reaction effect and realize continuous sludge dewatering, thereby reducing the manual cleaning frequency.

[0013] Optionally, the auger is horizontally movably installed in the sludge collection zone of the sewage treatment tank, the outer edge of the helical blade of the auger is matched with the gap of the sludge guide block, and the auger is used for pushing the sludge along the flow guide side plate to the inlet of the sludge collection pipe.

[0014] Through the above scheme, the precise gap matching design is used to ensure that there is no residue in the sludge conveying process and to avoid the wear of mechanical parts caused by friction.

[0015] Optionally, the flow guide side plate is arranged at an angle of 30° towards the direction of the release device, for gathering micro-nano bubbles and guiding the flocculated sludge to float; the bottom of the partition plate is spaced apart from the bottom surface of the sewage treatment tank, and the top extends above the liquid surface, for separating the air flotation zone from the sludge collection zone.

[0016] Through the above scheme, the fluid dynamics path is optimized by the 30° inclination to accelerate the solid-liquid separation process, and the physical separation of the air flotation zone and the collection zone is realized.

[0017] Optionally, the pressure balance valve is arranged inside the dissolved air tank, the outlet of the pressure balance valve is communicated with the release device through the equal pressure cavity shell, the pore size of the release device is 10-50 microns, and the release device is arranged in a matrix on the top of the equal pressure cavity shell.

[0018] Through the above scheme, the pressure balance valve and the matrix type micro-pore release device are combined to ensure the stability of bubble generation and improve the pollutant capture capacity per unit area.

[0019] Optionally, the sludge negative pressure tank is connected with the sludge collection pipe through a vacuum pump, and a filter screen layer is arranged inside the sludge negative pressure tank for separating sludge and residual liquid, and the mesh number of the filter screen layer is 200-400 meshes.

[0020] Through the above scheme, the high-mesh filter screen is combined with the negative pressure dewatering technology to reduce the water content of sludge to below 60%, meeting the environmental protection emission standard.

[0021] In summary, the present application has the following beneficial technical effects:

[0022] 1. The utility model discloses a bearing side plate, servo motor, double -end worm, worm wheel, auger and other parts are set up, through the coaxial connection of servo motor and double -end worm, and the meshing transmission relationship of double -end worm and worm wheel, make the auger can be rotated under the drive of worm wheel. Further reach the device can push the sludge that the auger rotates to the bottom of sewage treatment tank and transport it to the specific position in concentration, the sludge that is screened out is convenient for subsequent processing, improves the effect of sludge treatment efficiency.

[0023] 2. The utility model discloses a medicament mixing cavity top cover, flow guide side plate, partition plate, sludge collection pipe and sludge negative pressure tank and other parts are set up, through the cooperation of the flow guide side plate inclination setting and the release micro-nano bubble of release device, make micro-nano bubble can gather and drive flocculated sludge to float under the guidance of flow guide side plate. Meanwhile, the partition plate separates the air flotation zone from the sludge collection zone, and the sludge negative pressure tank collects the sludge through the sludge collection pipe. Further reach the device can through the efficient collection of reasonable structure design to the sludge that is screened, separation, improve the purpose of sewage treatment effect. DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the device in the embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the local structure of the device in the embodiment of the present application;

[0026] Figure 3 is a schematic diagram of the local structure of the sludge treatment mechanism in the embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the installation of the local structure of the sludge treatment mechanism in the embodiment of the present application.

[0028] Reference signs: 1, air flotation mechanism; 101, air compressor; 102, high-pressure pump; 103, air storage tank; 104, dissolved air tank; 105, isobaric cavity shell; 106, releaser; 2, sewage treatment tank; 3, medicament tank; 4, sludge treatment mechanism; 401, bearing side plate; 402, servo motor; 403, double-end worm; 404, worm gear; 405, auger; 406, sludge guide block; 407, medicament mixing cavity top cover; 408, flow guide side plate; 409, partition plate; 410, sludge collection pipe; 411, sludge negative pressure tank. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying drawings Figures 1-4 The present application will be further described in detail.

[0030] The embodiment of the present application discloses CNDAF type super-efficient nanometer dissolved air flotation machine.

[0031] Please refer to Figure 1 , the CNDAF type super-efficient nanometer dissolved air flotation machine, including air flotation mechanism 1, sewage treatment tank 2, medicament tank 3 and sludge treatment mechanism 4, air flotation mechanism 1 is fixedly arranged on one side of sewage treatment tank 2, medicament tank 3 is located on the other side of sewage treatment tank 2, and sludge treatment mechanism 4 is integrally installed in the inside of sewage treatment tank 2;

[0032] Please refer to Figures 2 to 4 , sludge treatment mechanism 4, sludge treatment mechanism 4 includes bearing side plate 401, servo motor 402, double-end worm 403, worm gear 404, auger 405 and sludge guide block 406, bearing side plate 401 is symmetrically fixedly installed on the inner walls of the left and right sides of sewage treatment tank 2, servo motor 402 is fixedly installed on the outside of bearing side plate 401, double-end worm 403 is coaxially connected with the output shaft of servo motor 402, worm gear 404 is in meshing transmission with double-end worm 403, auger 405 is fixedly connected to the center axis of worm gear 404, sludge guide block 406 is symmetrically and obliquely arranged on the inner walls of the left and right sides of sewage treatment tank 2 and located at the left and right ends of auger 405.

[0033] The air floatation mechanism 1 comprises an air compressor 101, a high-pressure pump 102, an air storage tank 103, a dissolved air tank 104, an isobaric cavity shell 105 and a releaser 106. The air compressor 101 is communicated with the air storage tank 103 and the dissolved air tank 104 through pipes respectively. The high-pressure pump 102 is fixedly installed on the top of the air compressor 101. The water outlet of the high-pressure pump 102 is connected to the water inlet of the air storage tank 103 through a pipe, for pumping the water in the air floatation separation zone of the sewage treatment tank 2 into the air storage tank 103. The air inlet of the dissolved air tank 104 is communicated with the isobaric cavity shell 105. The isobaric cavity shell 105 is uniformly distributed with a plurality of releasers 106 on the top thereof, for releasing micro-nano bubbles into the sewage treatment tank 2.

[0034] The sludge treatment mechanism 4 further comprises a medicament mixing cavity top cover 407, a flow guide side plate 408, a partition plate 409, a sludge collection pipe 410 and a sludge negative pressure tank 411. The medicament mixing cavity top cover 407 is fixedly covered on the top of the sludge guide block 406. The flow guide side plate 408 is obliquely arranged above the medicament mixing cavity top cover 407. The partition plate 409 is vertically fixed inside the sewage treatment tank 2 and separates the tank body into a central air floatation zone and two sludge collection zones. A stirrer is installed on the top of the medicament mixing cavity top cover 407, for mixing the sewage and flocculating substances between the releasers 106 and the isobaric cavity shell 105. One end of the sludge collection pipe 410 is communicated with the sludge collection zone, and the other end is connected to the sludge negative pressure tank 411.

[0035] The auger 405 is horizontally movably installed in the sludge collection zone of the sewage treatment tank 2. The outer edge of the helical blade of the auger 405 is gap-fitted with the sludge guide block 406, for pushing the sludge along the flow guide side plate 408 to the inlet of the sludge collection pipe 410.

[0036] The flow guide side plate 408 is arranged to be inclined by 30° towards the direction of the releasers 106, for gathering the micro-nano bubbles and guiding the flocculating sludge to float upwards. The bottom of the partition plate 409 is left with a gap from the bottom surface of the sewage treatment tank 2, and the top of the partition plate 409 extends above the liquid surface, for separating the air floatation zone and the sludge collection zone.

[0037] The pressure balance valve is arranged inside the dissolved air tank 104. The outlet of the pressure balance valve is communicated with the releasers 106 through the isobaric cavity shell 105. The releasers 106 have a pore diameter of 10-50 microns and are arranged in a matrix on the top of the isobaric cavity shell 105.

[0038] The sludge negative pressure tank 411 is connected with the sludge collection pipe 410 through a vacuum pump. A filter screen layer is arranged inside the sludge negative pressure tank 411, for separating the sludge and residual liquid. The mesh number of the filter screen layer is 200-400.

[0039] It needs to be further explained that:

[0040] The sludge treatment mechanism 4 is fixedly installed in the sewage treatment tank 2 by a bearing side plate 401, a double-end worm 403 is driven to rotate by a servo motor 402, horizontal rotation of a screw 405 is transmitted by a worm gear 404, the screw 405 is in gap cooperation with an inclined sludge guide block 406, sludge deposited at the bottom of the tank can be pushed to the inlet of a sludge collecting pipe 410 along a guide side plate 408, the structure realizes mechanized and centralized transportation of sludge, avoids the low efficiency problem of traditional manual cleaning, and can adapt to sludge treatment requirements of different concentrations by accurately controlling the rotating speed of the servo motor 402.

[0041] The sludge treatment mechanism 4 divides the treatment tank into a central air flotation area and two sludge collecting areas by a partition plate 409, an agitator is arranged in the top cover 407 of the medicament mixing cavity to accelerate the mixing reaction of the flocculant and the sewage, the guide side plate 408 guides the micro-nano bubbles released by the dissolved air mechanism 1 to flow to the sludge collecting area at an angle of 30°, the bubbles form a scum layer after adsorbing flocculation, at the same time, a sludge negative pressure tank 411 generates negative pressure by a vacuum pump, and the separated sludge is sucked into the tank through the sludge collecting pipe 410, the inside 200-400 mesh filter screen layer can effectively intercept solid particles to realize separation of sludge and water, the system significantly improves the sludge dewatering efficiency and treatment capacity through the air flotation-mechanical cooperation, and provides high-quality raw materials for subsequent resource utilization.

[0042] The implementation principle of the CNDAF type super-efficient nanometer dissolved air flotation machine in the embodiment of the application is as follows:

[0043] Firstly, the air compressor 101 injects high-pressure air into the air tank 103, and the high-pressure pump 102 extracts the water body in the air flotation area of the sewage treatment tank 2 and injects it into the air tank to form a gas-water mixture, the mixture enters the dissolved air tank 104 through the pressure balance valve to form supersaturated dissolved air water in the tank, and the dissolved air water is sprayed in a matrix form by the 10-50 micrometer pore diameter release device 106 at the top of the isobaric cavity shell 105 to generate a micro-nano bubble group with a diameter of 5-20 micrometers.

[0044] Secondly, the flocculant in the medicament tank 3 is injected into the front end of the sewage treatment tank 2 through the pipeline and is preliminarily mixed with the sewage, and under the action of the agitator arranged in the medicament mixing cavity top cover 407, the flocculant and the bubble-containing water body are further uniformly mixed to promote the pollutants to form flocculation aggregates, and the guide side plate 408 guides the bubbles to the central air flotation area at an angle of 30° to accelerate the adsorption of the bubbles and the flocculation aggregates.

[0045] Then, the micro-nano bubbles carrying the flocculation aggregates float to the water surface to form a scum layer, the partition plate 409 divides the tank body into a central air flotation area and two sludge collecting areas to prevent water flow disturbance from affecting the separation effect, the scum layer moves to the sludge collecting area under the guidance of the guide side plate 408, and the treated clear water is discharged through the overflow port of the tank body, and the sinking sludge that does not float is deposited at the bottom of the tank and enters the sludge treatment process.

[0046] Next, the servo motor 402 drives the double-end worm 403 to rotate, and the worm gear 404 drives the auger 405 to rotate horizontally. The auger 405 cooperates with the sludge guide block 406 to push the sludge at the bottom of the pool to the inlet of the sludge collection pipe 410 along the guide side plate 408. The sludge negative pressure tank 411 generates negative pressure through the vacuum pump to suck the sludge into the tank for preliminary concentration.

[0047] Finally, the 200-400 mesh filter screen in the sludge negative pressure tank 411 traps solid particles, the separated liquid returns to the treatment pool through the reflux pipe, and the solid sludge is discharged through the sludge discharge valve. The dry sludge after separation has a water content of 60%-70%, which can be directly incinerated, composted or made into bricks for resource utilization, achieving the goals of reduction and harmlessness of sewage treatment.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A CNDAF type high-efficiency nano dissolved air flotation machine, comprising an air flotation mechanism (1), a sewage treatment tank (2), a reagent tank (3), and a sludge treatment mechanism (4), characterized in that: The air flotation mechanism (1) is fixedly installed on one side of the sewage treatment tank (2), the reagent tank (3) is located on the other side of the sewage treatment tank (2), and the sludge treatment mechanism (4) is integrated and installed inside the sewage treatment tank (2). The sludge treatment mechanism (4) includes a bearing side plate (401), a servo motor (402), a double-headed worm (403), a worm wheel (404), an auger (405), and a sludge guide block (406). The bearing side plate (401) is symmetrically fixedly installed on the inner walls of the left and right sides of the sewage treatment tank (2). The servo motor (402) is fixedly installed on the outer side of the bearing side plate (401). The double-headed worm (403) is coaxially connected to the output shaft of the servo motor (402). The worm wheel (404) meshes with the double-headed worm (403) for transmission. The auger (405) is fixedly connected to the central axis of the worm wheel (404). The sludge guide block (406) is symmetrically and inclinedly arranged on both sides of the inner wall of the sewage treatment tank (2) and located at the left and right ends of the auger (405).

2. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 1, characterized in that: The air flotation mechanism (1) includes an air compressor (101), a high-pressure pump (102), an air storage tank (103), a dissolved air tank (104), an isobaric chamber shell (105), and a release device (106). The air compressor (101) is connected to the air storage tank (103) and the dissolved air tank (104) through pipes respectively. The high-pressure pump (102) is fixedly installed on the top of the air compressor (101), and its outlet is connected to the inlet of the air storage tank (103) through a pipe for pumping the water from the air flotation separation zone of the sewage treatment tank (2) into the air storage tank (103). The air inlet of the dissolved air tank (104) is connected to the isobaric chamber shell (105). Multiple release devices (106) are evenly distributed on the top of the isobaric chamber shell (105) for releasing micro-nano bubbles into the sewage treatment tank (2).

3. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 2, characterized in that: The sludge treatment mechanism (4) also includes a top cover (407) of the mixing chamber, a guide side plate (408), a partition plate (409), a sludge collection pipe (410), and a sludge negative pressure tank (411). The top cover (407) of the mixing chamber is fixedly covered on the top of the sludge guide block (406). The guide side plate (408) is inclinedly arranged above the top cover (407) of the mixing chamber. The partition plate (409) is vertically fixed inside the sewage treatment tank (2) and divides the tank into a central flotation zone and two sludge collection zones on both sides. A stirrer is installed on the top of the top cover (407) of the mixing chamber to mix the sewage and flocculants between the release device (106) and the outer shell (105) of the isobaric chamber. One end of the sludge collection pipe (410) is connected to the sludge collection zone, and the other end is connected to the sludge negative pressure tank (411).

4. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 3, characterized in that: The screw conveyor (405) is horizontally and movably installed in the sludge collection area of ​​the sewage treatment tank (2). Its spiral blades are in clearance fit with the sludge guide block (406) to push the sludge along the guide side plate (408) to the inlet of the sludge collection pipe (410).

5. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 3, characterized in that: The guide plate (408) is inclined at 30° toward the releaser (106) to gather micro-nano bubbles and guide flocculated sludge to float; the bottom of the partition plate (409) has a gap with the bottom surface of the sewage treatment tank (2) and the top extends above the liquid surface to isolate the flotation zone from the sludge collection zone.

6. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 2, characterized in that: The dissolved gas tank (104) is equipped with a pressure balancing valve inside, and its outlet is connected to the release device (106) through the isobaric chamber shell (105). The release device (106) has an aperture of 10-50 micrometers and is arranged in a matrix on the top of the isobaric chamber shell (105).

7. The CNDAF type high-efficiency nano dissolved air flotation machine according to claim 3, characterized in that: The sludge negative pressure tank (411) is connected to the sludge collection pipe (410) via a vacuum pump. It has a filter screen layer inside for separating sludge from residual liquid. The mesh size of the filter screen layer is 200-400 mesh.

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