CN216764382U - Micro-nano air supporting machine - Google Patents

Abstract

The utility model discloses a micro-nano air flotation machine, wherein a pool body of the air flotation machine comprises a flocculation reaction area, a contact area, a separation area and a clear water area according to the flowing direction of liquid to be treated; the liquid firstly enters a flocculation reaction zone, a contact zone is communicated with the flocculation reaction zone only through a water distribution pipe at the bottom of a pool, and the flocculated liquid enters the contact zone from the water distribution pipe and is fully contacted with the micro-nano bubbles; the contact zone is communicated with the separation zone only at the upper part, a scum layer formed by the contact zone enters the separation zone, the scum layer is discharged from the upper part of the separation zone through a slag scraper, and clear water below the separation zone enters a clear water zone; part of clear water is supplied for producing micro-nano bubbles, and the rest clear water is filtered into high-definition water and flows out from a water outlet for utilization. The utility model not only overcomes the problems of poor water quality effect, complex operation, blockage and the like of the traditional air floatation water outlet, but also greatly improves the working efficiency, the sewage outlet effect, the water recycling effect, the economic benefit and the safety factor, and reduces the operation and construction cost.

Description

Micro-nano air supporting machine

Technical Field

The utility model relates to a solid-liquid separation treatment technology, in particular to a micro-nano air flotation machine.

Background

At present, in the aspect of water supply and drainage, except for some raw water bodies containing more sand and sewage containing heavier mechanical impurities, most of pretreated water is light suspended particles with the specific gravity very close to that of water, such as: algae in lakes, reservoirs, and some rivers; plant residues and fine colloidal impurities; dye granules in the printing and dyeing industry; short fibers in the paper and chemical fiber industries; microdroplets of petroleum and organic solvents in the oil refining and chemical industries; heavy metal ions in the electroplating and pickling wastewater; electrophoretic paint waste water, and the like. For these raw water, if the conventional precipitation method is used, the effect is poor, and especially under the low temperature condition in winter, the treatment effect is more difficult to guarantee due to the deterioration of coagulation and hydraulic conditions. For the flocs which are difficult to precipitate, the flocs need to sink, and air bubbles need to be artificially introduced into the water body to be adhered to the flocs, so that the overall density of the flocs is greatly reduced, and the flocs are forced to float upwards by virtue of the rising speed of the air bubbles, thereby realizing rapid solid-liquid separation. Therefore, the emergence of the air flotation technology is a revolution to the gravity sedimentation method, and a new field of solid-liquid separation technology is developed. For example, the publication date is 2019, 9, 17 and the publication number is CN209396935U, and the disclosure document discloses a sealed dissolved air flotation machine, which comprises an air flotation machine body, a water inlet pipe and a water outlet pipe, wherein a fixed plate is installed at the top end inside the air flotation machine body, a storage battery, a PLC controller, a fan and a smell filter box are sequentially installed at the top of the fixed plate, rotating shafts are evenly hinged inside the air flotation machine body below the fixed plate, a transport chain is installed between the rotating shafts, the water inlet pipe and the water outlet pipe are respectively installed at two ends outside the air flotation machine body, a dissolved air tank is installed at the other side of the air flotation machine body through a fixed frame, a noise reduction case is installed below the dissolved air tank, and an air compressor is installed inside the noise reduction case.

Along with the increasing requirements on the air flotation machine, the traditional air flotation machine has the following problems:

1. a certain amount of suspended matters, colloids and grease still exist in the effluent, and the removal effect is low.

2. The removal rate of suspended matters, colloid and grease in effluent can increase the burden of the post-treatment section.

3. And an air compressor system is required, the equipment cost is increased, and the noise of the air compressor is high.

4. The generated bubbles are large, and the amount of bubbles in a unit volume is small, so that the air floatation efficiency is influenced.

5. The traditional air floatation is difficult to adjust, and has high requirement on the professional degree of operators.

6. The operation cost is high, and higher medicament is required to be used.

7. The installation and maintenance are complex, the maintenance time is long, and the maintenance cost is relatively high.

8. It cannot be sterilized.

9. The effluent is poor in decolorization.

10. Can clog the release, require maintenance downtime in the event of a clog, increase maintenance costs, and cause operational costs in production.

Therefore, there is a need for an improvement to existing air flotation machines that overcomes the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model provides a micro-nano air flotation machine which is used for solid-liquid separation of water treatment, can greatly overcome the problems of poor water quality effect, complex operation, blockage and the like of the traditional air flotation effluent, also greatly improves the working efficiency, the sewage effluent effect and the water recycling effect, has high safety and can greatly reduce the operation and construction cost.

The utility model aims to be realized by the following technical scheme:

a micro-nano air flotation machine comprises a flocculation reaction area, a contact area, a separation area and a clear water area in a pool body of the air flotation machine according to the flowing direction of liquid to be treated; the flocculation reaction zone is positioned at the water inlet end, a water inlet is formed in the side wall of the tank body of the flocculation reaction zone, a first partition plate is arranged between the contact zone and the flocculation reaction zone, the contact zone is communicated with the flocculation reaction zone only through a water distribution pipe at the bottom of the tank body, liquid enters the contact zone from the water distribution pipe, a second partition plate is arranged between the contact zone and the separation zone, the second partition plate partitions the contact zone and the lower area of the separation zone, the contact zone is communicated with the upper area of the separation zone for liquid to flow, the separation zone and the clean water zone are partitioned through a third partition plate, and the clean water zone is positioned at the water outlet end;

the flocculation reaction zone is provided with a stirring device for fully stirring the liquid and the medicament;

the flocculation reaction zone is provided with a micro-nano system for generating micro-nano bubbles, and the micro-nano system comprises a plurality of anti-clogging micro-nano bubble releasers arranged at the upper ends of the water distribution pipes;

a filtering device is arranged above the clear water area, a slag discharge port II is formed in the position, corresponding to a slag discharge position of the filtering device, of the tank wall, a clear water tank is arranged below the clear water area, a water outlet is formed in the side wall of the tank body on the clear water tank, a plurality of emptying ports are formed in the side wall of the tank body, and the emptying ports are abutted against the bottom of the tank body;

in the separation area, a first slag discharge groove is arranged on a third partition plate, a slag scraper is arranged at the top of the separation area corresponding to the first slag discharge groove, a first slag discharge port is formed in the position, corresponding to the pool wall, of the first slag discharge groove, a plurality of horizontal water collecting pipes communicated with the clean water area are arranged below the first slag discharge groove, the water collecting pipes are close to the bottom of the separation area, and water in the separation area enters the clean water area through the water collecting pipes;

and a filtering device is arranged above the clear water area, a slag discharge port II is formed in the position, corresponding to the slag discharge position of the filtering device, of the tank wall, a clear water tank is arranged below the clear water area, a water outlet is formed in the side wall of the tank body on the clear water tank, a plurality of emptying ports are formed in the side wall of the tank body, and the emptying ports are close to the bottom of the tank body.

Furthermore, the stirring device comprises a stirring driving device, a stirring shaft and stirring blades, the stirring driving device drives the stirring shaft, and the stirring shaft is provided with a plurality of stirring blades.

Further, micro-nano system still includes gas-liquid separation jar, gas-liquid pump and supporting valve and pipeline, gas-liquid separation jar, gas-liquid pump arrange in the cell body outside, and the one end of release pipeline is connected to gas-liquid separation jar one end, and the other end of release pipeline extends to the water distributor upper end in the cell body from the cell body upper end and connects micro-nano bubble releaser, and gas-liquid separation jar's the other end loops through the pipe connection who is provided with stop valve two, check valve to one side of gas-liquid pump, and the opposite side of gas-liquid pump is through the return water pipeline and the clear water district intercommunication that set gradually Y type filter, stop valve one. The micro-nano bubble system can also be provided with an ozone machine.

Further, scrape the sediment machine and including scraping sediment drive arrangement, scraper blade, transmission shaft, sprocket and chain, scrape sediment drive arrangement cooperation transmission shaft, sprocket and chain drive scraper blade work, scrape the impurity to slag discharge groove two through the scraper blade, through a discharge cell body from slag discharge opening.

Furthermore, be provided with baffle four in the clear water district, baffle four cuts off the latter half of clear water district, and the upper end that clear water district upper end is close to the disengagement zone is provided with liquid level adjusting device, and filter equipment is located the upper end that the disengagement zone was kept away from to clear water district upper end.

Furthermore, the first slag discharging groove takes the pool wall and the third partition plate as three side walls, the top of the side wall far away from the clear water area in the fourth side is provided with a foam guide plate with an inclination angle, the foam guide plate can be effectively used for guiding impurity foam scraped to the first slag discharging groove by the scraping plate, and the bottom of the first slag discharging groove is higher than the water collecting pipe.

Furthermore, the filtering device comprises a rack, a rotary drum filter screen, a rotary drum driving device and a second slag discharge groove, the rotary drum driving device is installed on the outer wall of the tank body in the clean water area and connected with the rotary drum filter screen, the rotary drum filter screen is horizontally arranged in the tank body in a direction perpendicular to the flowing direction of liquid through the rack, the second slag discharge groove is located in the axial direction of the rotary drum filter screen, the second slag discharge groove corresponds to the second slag discharge port, and impurities filtered by the rotary drum filter screen are discharged out of the tank body from the second slag discharge port.

For the drum filter screen, the design is further as follows:

the drum filter screen comprises a spiral filter screen and a plurality of metal fixing strips which are uniformly welded on the outer surface of the metal wedge-shaped strip filter screen along the axial direction, and the spiral filter screen is formed by spirally winding the metal wedge-shaped strips.

The width of the gap of the drum filter screen is 10-1000 microns.

The sharp-angled end of the cross section of the metal wedge-shaped strip faces outwards.

And a protruding strip is arranged on one side surface of the metal fixing strip and is welded with the inner surface of the filter screen through the protruding strip.

The metal wedge-shaped strips and the metal fixing strips can be made into wires with different cross-sectional shapes by adopting round wires made of different materials according to requirements.

Further, still install the washing subassembly above the filter equipment, the washing subassembly includes scavenge pipe, nozzle and scavenging pump, and the nozzle is installed in rotary drum filter screen top, and the scavenging pump is installed in the cell body outside, and the nozzle passes through the scavenge pipe and is connected to the scavenging pump, and the scavenging pump passes through pipeline and clear water district intercommunication, utilizes the clear water in clear water district to spray the washing.

Furthermore, the size of the pool body can be properly configured according to the sewage quantity to be treated.

The working principle of the utility model is as follows:

firstly, feeding raw water to be treated into a flocculation reaction zone through a water inlet, feeding a prepared medicament into the flocculation reaction zone, and fully stirring and flocculating the raw water;

secondly, the flocculated raw water enters a contact zone through a water distribution pipe to be fully contacted and mixed with the micro-nano bubbles released by the micro-nano releaser, so that suspended matters or oil in the water fully absorb the adhered micro-nano bubbles and then enter a separation zone;

thirdly, in the separation zone, suspended matters or oils in water float out of the water surface under the action of micro-nano bubble buoyancy to form a scum layer, and the scum layer is scraped to a first slag discharge groove by a slag scraper; the clean water in the lower layer is collected to the clean water tank through the water collecting pipe, one part of the clean water can be used for pump dissolved air water, the other part of the residual clean water can be filtered through the filtering device, the filtered high-definition water flows out from the water outlet, and the filter residue is discharged from the residue discharge groove II through the residue discharge port II.

Through the structure, the utility model has the following beneficial effects:

1. SS, COD and the like of the effluent are greatly reduced, the effluent is clearer, the COD can be effectively reduced, the burden of subsequent processes is greatly solved, and the MBR blockage problem can be effectively reduced;

2. the micro-nano air floatation machine is more stable in air dissolving; the traditional air floatation dissolved air is not easy to adjust, and has high requirement on the professional degree of operators;

3. the micro-nano air floatation machine adopts micro-nano bubbles, has all the characteristics of the micro-nano bubbles, such as large specific surface area, generation of a large amount of free radicals, electrification and other special physical and chemical characteristics, and has better treatment efficiency and effect than the traditional air floatation;

4. the treatment effect on the light oil is good, and the removal rate reaches over 95 percent;

5. the operation cost is low: the agent is reduced, and the sterilization can be realized, and particularly in leather factories, the agent can not be added;

6. for the common process, a large amount of civil engineering is needed subsequently, such as a biochemical pond and other civil engineering ponds, a large amount of civil engineering cost is needed, and the novel using product can greatly reduce the civil engineering cost;

7. the integrated integral design is adopted, the design is compact, the operation is simple, the automation degree is high, the maintenance is light and simple, and the maintenance time is short;

8. a filtering system: the filtering system adopts a special structure mode, and the drum filter screen is made of stainless steel materials, so that the filtering capacity is stronger, the blockage is not easy to cause, the cleaning is easy, the service life is longer, the filtering recovery/separation effect is greatly improved, the working time effect is increased, and the working efficiency is greatly improved; the drum filter screen can also adopt a woven mesh;

9. the continuous automatic operation is realized, the continuous water discharge can reach more than 95% for removing SS, grease and the like, and the burden of subsequent processes is greatly reduced, so that the area of a civil engineering pond and the civil engineering cost of the subsequent processes are reduced;

10. the equipment can be integrated with a screw stacking machine, can directly treat the scum, and the mud content of the discharged mud reaches more than 5 percent.

Drawings

Fig. 1 is a partial sectional structural view of the present invention.

Fig. 2 is a schematic front view of the present invention.

Fig. 3 is a schematic top view of the present invention.

Fig. 4 is a schematic perspective view of the present invention.

Fig. 5 is a schematic diagram of the micro-nano bubble system of the present invention.

Fig. 6-8 are schematic structural views of the drum screens of the present invention.

Wherein the reference numerals are: 1. a water inlet, 2, a stirring driving device, 3, a release pipeline, 4, a return water pipeline, 5, a chain wheel, 6, a scraper, 7, a slag scraping driving device, 8, a rotary drum driving device, 9, a cleaning pump, 10, a cleaning pipe, 11, a one-way valve, 12, a first stop valve, 13, a Y-shaped filter, 14, a gas-liquid pump, 15, a second stop valve, 16, a gas-liquid separation tank, 17, a pressure gauge, 18, a safety valve, 19, a first slag discharge port, 20, a water outlet, 21, a vent, 22, a second slag discharge port, 23, a transmission shaft, 24, a chain, 25, a liquid level adjusting device, 26, a rotary drum filter screen, 27, a micro-nano bubble releaser, 28, a water collecting pipe, 29, a second partition plate, 30, a water distribution pipe, 31, a stirring shaft, 32, stirring blades, 33, a foam guide plate, 34, a first slag discharge tank, 35, a flocculation reaction zone, 36, a separation zone, 37, 38, a clean water zone, 39. and a second slag discharge groove, 40, a nozzle, 41, an exhaust valve, 42, a metal wedge strip, 43, a metal fixing strip and 44, wherein the gap is formed between the two slag discharge grooves.

Detailed Description

The structure and operation of the present invention will be described with reference to the accompanying drawings.

Example 1

As shown in fig. 5, a micro-nano air flotation machine includes a flocculation reaction zone 35, a contact zone 36, a separation zone 37 and a clean water zone 38 in a tank body of the air flotation machine according to a flow direction of a liquid to be treated. Wherein: the flocculation reaction zone 35 is positioned at a water inlet end, a water inlet 1 is arranged on the side wall of the flocculation reaction zone 35, a first partition plate is arranged between a contact zone 36 and the flocculation reaction zone 35, the contact zone 36 is communicated with the flocculation reaction zone 35 only through a water distribution pipe 30 at the bottom of the tank body, liquid enters the contact zone 36 from the water distribution pipe 30, a second partition plate 29 is arranged between the contact zone 36 and a separation zone 37, the second partition plate 29 partitions the lower area of the contact zone 36 and the lower area of the separation zone 37, the contact zone 36 is communicated with the upper area of the separation zone 37 for liquid flow, water in the contact zone 36 can enter the separation zone 37 only when the height of the second partition plate 29 is higher than that of the separation zone 37, the separation zone 37 and a clean water zone 38 are partitioned through a third partition plate, and the clean water zone 38 is positioned at a water outlet end.

As shown in fig. 1, 2 and 5, the flocculation reaction zone 35 is provided with a stirring device for sufficiently stirring the liquid and the medicament in the zone.

As shown in fig. 1-3 and 5, the flocculation reaction zone 35 is configured with a micro-nano system for generating micro-nano bubbles, and the micro-nano system includes a plurality of anti-clogging micro-nano bubble releasers 27 disposed at the upper end of the water distribution pipe 30.

As shown in fig. 2 and 5, a filtering device is arranged above the clean water area 38, a second slag discharge port 22 is formed in a position of the tank wall corresponding to a slag discharge position of the filtering device, a clean water tank is arranged below the clean water area 38, a water outlet 20 is formed in the tank body side wall of the clean water tank, a plurality of vent ports 21 are formed in the tank body side wall, and the vent ports 21 are close to the bottom of the tank body;

as shown in fig. 1, 2 and 5, the separation region 37 is provided with a slag scraper mounted at the top of the separation region 37 and a slag discharge groove i 34 mounted on a partition plate iii, the slag discharge groove i 34 is located below the slag scraper, a slag discharge port i 19 is formed in the position of the slag discharge groove i 34 corresponding to the tank wall, a plurality of horizontal water collecting pipes 28 communicated with the clean water region 38 are arranged below the slag discharge groove i 34, the water collecting pipes 28 are close to the bottom of the separation region 37, and water in the separation region 37 enters the clean water region 38 through the water collecting pipes 28.

The working principle of the utility model is as follows:

firstly, raw water to be treated is fed into a flocculation reaction zone 35 through a water inlet 1, and a prepared medicament is fed into the flocculation reaction zone 35 to be fully stirred and flocculated with the raw water;

secondly, the flocculated raw water enters the contact zone 36 through the water distribution pipe 30 and is fully contacted and mixed with the micro-nano bubbles released by the micro-nano releaser 27, so that suspended matters or oil in the water fully absorb the adhered micro-nano bubbles, and then the flocculated raw water enters the separation zone 37;

thirdly, in the separation area 37, after a scum layer on the water surface accumulates along with time and is gathered to a certain thickness, suspended matters or oils in the water float out of the water surface under the action of micro-nano bubble buoyancy to form a scum layer, and the scum layer is scraped to a first slag discharge groove 34 by a slag scraper; the clean water of lower floor collects the flow to the clean water pond through collector pipe 28, and partly can supply the micro-nano system pump to dissolve gas water and use, and partly remaining clear water accessible filter equipment filters, and the high clear water after the filtration flows out from delivery port 20, and the filter residue is discharged through row cinder notch two 22 to realize getting rid of purposes such as aquatic SS, grease.

As shown in fig. 1 and 3-5, the protein separation tank is configured with a micro-nano bubble system, and the micro-nano bubble system comprises a micro-nano releaser 27 arranged in the protein separation tank, a gas-liquid separation tank 16 arranged outside the protein separation tank, a gas-liquid pump 14 and a valve matched with a filter. Clear water and air are sent into a gas-liquid separation tank 16 by a gas-liquid pump 14, air and water dissolution is carried out in the gas-liquid separation tank 16, dissolved gas water generated after gas dissolution is sent to a micro-nano releaser 27, and micro-nano bubbles are released by the micro-nano releaser 27.

One side of the gas-liquid separation tank 16 is connected with the nanometer releaser 27 through a pipeline, the other side of the gas-liquid separation tank 16 is connected to one end of a gas-liquid pump 14 through a valve and a pipeline, and the other end of the gas-liquid pump 14 is connected to a clear water area 38 in the protein separation tank through a filter, a valve and a pipeline.

Correspondingly, the workflow of this embodiment is:

firstly, raw water conveying: raw water to be treated is sent into the protein separation tank through the water inlet 1.

Secondly, generating micro-nano bubbles: clear water and air are sent into the gas-liquid separation tank 16 by the gas-liquid pump 14, the air and the water are dissolved in the gas-liquid separation tank 16, the dissolved water generated after the dissolution is sent to the micro-nano releaser 27 in the protein separation tank, and micro-nano bubbles are released in the protein separation tank by the micro-nano releaser 27.

Thirdly, collecting and separating: the raw water enters the protein separation tank to be fully contacted and mixed with the micro-nano bubbles, suspended matters or oil in the water are fully absorbed and adhered to the micro-nano bubbles, the suspended matters or the oil in the water float out of the water surface to form a scum layer under the action of the buoyancy of the micro-nano bubbles, and the scum layer overflows into the protein collector; the clean water in the lower layer can be discharged through the water outlet 20 for reuse.

Fourthly, treating scum: when the amount of micro-nano bubbles with impurities in the protein collector reaches a certain degree, a cleaning spraying system is started, clean water at the bottom of the protein separation tank is pumped by a cleaning pump, the clean water is pumped to a nozzle 40 positioned in the protein collector through a cleaning pipe 10, the clean water is sprayed by the nozzle 40 to clean the protein collector and scum is discharged.

In practical application, the pool body can be configured into a proper size according to the sewage quantity to be treated.

Example 2

Based on the structure of embodiment 1, the stirring device includes stirring drive device 2, stirring shaft 31 and stirring vane 32, stirring drive device 2 drives stirring shaft 31, and stirring shaft 31 is provided with a plurality of stirring vanes 32.

Example 3

Based on embodiment 1 or 2's structure, micro-nano system still includes gas-liquid separation jar 16, gas-liquid pump 14 and supporting valve and pipeline, gas-liquid separation jar 16, gas-liquid pump 14 arrange outside the cell body, and the one end of release pipeline 3 is connected to the one end of gas-liquid separation jar 16, and the other end of release pipeline 3 extends to the water distributor 30 upper end in the cell body from the cell body upper end and connects micro-nano bubble releaser 27, and the other end of gas-liquid separation jar 16 loops through the pipeline that is provided with stop valve two 15, check valve 11 and is connected to one side of gas-liquid pump 14, and the opposite side of gas-liquid pump 14 is through being provided with Y type filter 13 in proper order, the backward flow water pipeline 4 and the clear water district 38 intercommunication of stop valve one 12.

The gas-liquid separation tank 16 is also provided with a pressure gauge 17, a safety valve 18 and an exhaust valve 41.

The specific generation of the dissolved gas water: part of clear water and air in the clear water area 38 are sent into the gas-liquid separation tank 16 by the gas-liquid pump 14 to be dissolved by air and water, and dissolved air water generated after air dissolution is sent to the micro-nano releaser 27 to be released in the contact area 36 to generate micro-nano bubbles.

Example 4

Based on any structure of above-mentioned embodiment, scrape the sediment machine and include scraping sediment drive arrangement 7, scraper blade 6, transmission shaft 23, sprocket 5 and chain 24, scrape sediment drive arrangement 7 cooperation transmission shaft 23, sprocket 5 and chain 24 drive scraper blade 6 work, scrape the impurity to slag discharge groove two 39 through scraper blade 6, through discharging the cell body from slag discharge opening one 19.

Furthermore, a fourth partition plate is arranged in the clean water area 38, the fourth partition plate partitions the lower half portion of the clean water area 38, a liquid level adjusting device 25 is arranged at the upper end of the clean water area 38 close to the separation area 37, and a filtering device is arranged at the upper end of the clean water area 38 far away from the upper end of the separation area 37.

Furthermore, the first slag discharging groove 34 takes the pool wall and the third partition plate as three side walls, the top of the fourth side wall far away from the clean water area 38 is provided with a foam guide plate 33 with an inclined angle, the foam guide plate 33 can be effectively used for guiding impurity foam scraped towards the first slag discharging groove 34 by the scraping plate 6, and the bottom of the first slag discharging groove 34 is obviously higher than the bottom of the clean water groove and higher than the water collecting pipe 28.

Example 5

Based on any structure of the above embodiment, the filtering device includes a frame, a drum filter screen 26, a drum driving device 8 and a second slag discharge groove 39, the drum driving device 8 is installed on the outer wall of the tank body in the clean water area 38 and connected with the drum filter screen 26, the drum filter screen 26 is horizontally arranged in the tank body through the frame in a direction perpendicular to the flow direction of the liquid, the second slag discharge groove 39 is located in the axial direction of the drum filter screen 26, the second slag discharge groove 39 corresponds to the second slag discharge port 22, and impurities filtered by the drum filter screen 26 are discharged out of the tank body from the second slag discharge port 22.

As shown in fig. 6-8, the drum screen 26 includes a spiral filter screen formed by spirally winding a metal wedge bar 42 and a plurality of metal fixing bars 43 uniformly welded to the outer surface of the filter screen along the axial direction of the metal wedge bar 42. In actual production, the drum screen 26 is formed by welding a metal fixing strip 43 in the spiral screen and then rolling the strip back.

The width of the slots 44 of the rotary screen 26 may be 10-1000 microns.

The sharp ends of the cross-section of the metal wedge strip 42 face outwardly.

And a protruding strip is arranged on one side surface of the metal fixing strip 43 and is welded with the inner surface of the filter screen through the protruding strip.

The metal wedge-shaped strips 42 and the metal fixing strips 43 can be made of round wires made of different materials into wires with different cross-sectional shapes according to requirements.

Example 6

Based on any structure of above-mentioned embodiment, the cleaning assembly is still installed to the filter equipment top, cleaning assembly includes scavenge pipe 10, nozzle 40 and scavenging pump 9, and nozzle 40 is installed in rotary drum filter screen 26 top, and scavenging pump 9 is installed outside the cell body, and nozzle 40 is connected to scavenging pump 9 through scavenge pipe 10, and scavenging pump 9 passes through pipeline and clear water district 38 intercommunication, utilizes the clear water in clear water district 38 to spray the washing.

During operation, the cleaning device can automatically clean the drum filter screen 26 continuously or intermittently, and the cleaning can be automatically controlled or manually controlled through liquid level and time. When the liquid level/time reaches a set value, the cleaning assembly starts to automatically clean the drum filter screen 26, the drum driving device 8 drives the drum filter screen 26 to rotate for 360 degrees during cleaning, filtered clean water is pumped into the nozzle 40 by the cleaning pump 9, and the drum filter screen 26 is backwashed through the nozzle 40.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, but rather as the subject matter of the utility model is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the utility model are therefore intended to be embraced therein.

Claims (10)

1. A micro-nano air supporting machine is characterized in that: the tank body of the air flotation machine comprises a flocculation reaction zone (35), a contact zone (36), a separation zone (37) and a clear water zone (38) according to the flowing direction of liquid to be treated; the flocculation reaction zone (35) is positioned at a water inlet end, a water inlet (1) is formed in the side wall of the flocculation reaction zone (35), a first partition plate is arranged between the contact zone (36) and the flocculation reaction zone (35), the contact zone (36) is communicated with the flocculation reaction zone (35) only through a water distribution pipe (30) at the bottom of the tank body, liquid enters the contact zone (36) from the water distribution pipe (30), a second partition plate (29) is arranged between the contact zone (36) and the separation zone (37), the second partition plate (29) partitions the lower area of the contact zone (36) and the lower area of the separation zone (37), the contact zone (36) is communicated with the upper area of the separation zone (37) for liquid to flow, the separation zone (37) and the clear water zone (38) are partitioned through a third partition plate, and the clear water zone (38) is positioned at a water outlet end;

the flocculation reaction zone (35) is provided with a stirring device for stirring liquid and medicament;

the flocculation reaction zone (35) is provided with a micro-nano system for generating micro-nano bubbles, and the micro-nano system comprises a plurality of anti-clogging micro-nano bubble releasers (27) arranged at the upper ends of the water distribution pipes (30);

in the separation area (37), a first slag discharge groove (34) is arranged on a third partition plate, a slag scraper is arranged at the top of the separation area (37) corresponding to the first slag discharge groove (34), a first slag discharge opening (19) is formed in the position, corresponding to the pool wall, of the first slag discharge groove (34), a plurality of horizontal water collecting pipes (28) communicated with the clean water area (38) are arranged below the first slag discharge groove (34), the water collecting pipes (28) are close to the bottom of the separation area (37), and water in the separation area (37) enters the clean water area (38) through the water collecting pipes (28);

a filtering device is arranged above the clean water area (38), a slag discharge port II (22) is formed in the position, corresponding to a slag discharge position, of the filtering device, a clean water tank is arranged below the clean water area (38), a water outlet (20) is formed in the side wall of the tank body on the clean water tank, a plurality of emptying ports (21) are formed in the side wall of the tank body, and the emptying ports (21) are close to the bottom of the tank body.

2. The micro-nano air flotation machine according to claim 1, characterized in that: the stirring device comprises a stirring driving device (2), a stirring shaft (31) and stirring blades (32), wherein the stirring driving device (2) drives the stirring shaft (31), and the stirring shaft (31) is provided with a plurality of stirring blades (32).

3. The micro-nano air flotation machine according to claim 1, characterized in that: the micro-nano system further comprises a gas-liquid separation tank (16), a gas-liquid pump (14) and matched valves and pipelines, the gas-liquid separation tank (16) and the gas-liquid pump (14) are arranged outside the tank body, one end of the gas-liquid separation tank (16) is connected with one end of a release pipeline (3), the other end of the release pipeline (3) extends from the upper end of the tank body to the upper end of a water distribution pipe (30) in the tank body to be connected with a micro-nano bubble releaser (27), the other end of the gas-liquid separation tank (16) is connected to one side of the gas-liquid pump (14) through a pipeline provided with a second stop valve (15) and a one-way valve (11) in sequence, and the other side of the gas-liquid pump (14) is communicated with a clean water area (38) through a backflow water pipeline (4) provided with the Y-shaped filter (13) and the first stop valve (12) in sequence.

4. The micro-nano air flotation machine according to claim 1, characterized in that: the micro-nano bubble system is provided with an ozone machine.

5. The micro-nano air flotation machine according to claim 1, characterized in that: the slag scraper comprises a slag scraping driving device (7), a scraper (6), a transmission shaft (23), a chain wheel (5) and a chain (24), wherein the slag scraping driving device (7) is matched with the transmission shaft (23), the chain wheel (5) and the chain (24) to drive the scraper (6) to work.

6. The micro-nano air flotation machine according to claim 1, characterized in that: a fourth partition plate is arranged in the clean water area (38), the fourth partition plate partitions the lower half portion of the clean water area (38), a liquid level adjusting device (25) is arranged at the upper end, close to the separation area (37), of the upper end of the clean water area (38), and the filtering device is located at the upper end of the clean water area (38) and far away from the upper end of the separation area (37).

7. The micro-nano air flotation machine according to claim 1, characterized in that: and the top of the side wall of the first slag discharging groove (34) far away from the clear water area (38) is provided with a foam guide plate (33) with an inclined angle, and the bottom of the first slag discharging groove (34) is higher than the water collecting pipe (28).

8. The micro-nano air flotation machine according to claim 1 or 6, characterized in that: the filter device comprises a rack, a rotary drum filter screen (26), a rotary drum driving device (8) and a slag discharge groove II (39), wherein the rotary drum driving device (8) is installed on the outer wall of the tank body of the clear water area (38) and connected with the rotary drum filter screen (26), the rotary drum filter screen (26) is horizontally arranged in the tank body in a direction perpendicular to the flowing direction of liquid through the rack, the slag discharge groove II (39) is positioned on the axial direction of the rotary drum filter screen (26), the position of the slag discharge groove II (39) corresponds to the position of the slag discharge port II (22), and impurities filtered by the rotary drum filter screen (26) are discharged out of the tank body from the slag discharge port II (22).

9. The micro-nano air flotation machine according to claim 8, characterized in that: the drum filter screen (26) comprises a spiral filter screen and a plurality of metal fixing strips (43) which are uniformly welded on the outer surface of the metal wedge-shaped strip (42) along the axial direction, and the spiral filter screen is formed by spirally winding the metal wedge-shaped strip (42); the width of a gap (44) of the drum filter screen (26) is 10-1000 microns, the sharp-angled end of the section of the metal wedge-shaped strip (42) faces outwards, a protruding strip is arranged on one side surface of the metal fixing strip (43), and the protruding strip is welded with the inner surface of the filter screen; the metal wedge-shaped strips (42) and the metal fixing strips (43) are made of different materials and are made into wires with different cross-sectional shapes.

10. The micro-nano air flotation machine according to claim 1, characterized in that: the cleaning assembly is further installed above the filtering device and comprises a cleaning pipe (10), a nozzle (40) and a cleaning pump (9), the nozzle (40) is installed at the top of the rotary drum filter screen (26), the cleaning pump (9) is installed outside the tank body, the nozzle (40) is connected to the cleaning pump (9) through the cleaning pipe (10), the cleaning pump (9) is communicated with the clean water area (38) through a pipeline, and the clean water in the clean water area (38) is utilized for spraying and cleaning.

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