CN110776129A - Vertical flow type precipitation and air floatation device for water treatment and working method thereof - Google Patents
Vertical flow type precipitation and air floatation device for water treatment and working method thereof Download PDFInfo
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- CN110776129A CN110776129A CN201910817899.9A CN201910817899A CN110776129A CN 110776129 A CN110776129 A CN 110776129A CN 201910817899 A CN201910817899 A CN 201910817899A CN 110776129 A CN110776129 A CN 110776129A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
Abstract
The invention discloses a vertical flow type precipitation and air floatation device for water treatment and a working method thereof, and the technical key points are as follows: the device comprises a tank body, wherein the middle upper part of the tank body is cylindrical, and a sludge discharge area, a water inlet and distribution area, a sedimentation water outlet stable flow area, an air flotation contact area and a slag-water separation area are vertically distributed in the tank body from bottom to top; the sedimentation zone is internally provided with filler, a partition plate is arranged between the sedimentation water steady flow zone and the air flotation contact zone, the bottom of the air flotation contact zone penetrates through the middle of the partition plate, the top of the sedimentation water steady flow zone is provided with a plurality of radial communicating pipes and an annular water collecting pipe which are positioned on the same plane, the radial communicating pipes and the annular water collecting pipe are provided with a plurality of groups of through holes, upward water flows pass through the annular water collecting pipe to be communicated with the radial communicating pipes, the radial communicating pipes are communicated with the air flotation contact zone, the radial communicating pipes are provided with a flocculating agent supplementing device, and the sedimentation zone has the advantages of reasonable structure, definite function partition, no mutual influence.
Description
Technical Field
The invention relates to the field of environmental protection and sewage treatment, in particular to a high-efficiency solid-liquid separation device, which is a vertical flow type precipitation and air flotation device for water treatment and a working method thereof.
Background
The suspended matters are blackening factors of the water body and are also inducing factors of the water body smelling. The problem of blackening of the water body can be effectively solved by removing suspended matters in the water body, and the odorous environmental pressure is relieved. The existing solid-liquid separation technology cannot simultaneously solve the solid-liquid separation of suspended matters with large specific gravity and small specific gravity in flow state and flow.
However, the existing design scheme is that the tank body is generally designed to be square, and the volume utilization rate of the separation area is low. In the prior art, an air flotation technology and a precipitation technology are generally superposed, air flotation or precipitation is carried out independently by adjusting a valve, but the air flotation and precipitation cannot be operated simultaneously, otherwise the flow state of the system is disordered, and dissolved air flotation water is released in a precipitation area, so that the solid-liquid separation effect is seriously influenced. Or the water power flow state is unreasonable, the good operation of the air floatation process and the sedimentation process cannot be effectively ensured, and the effluent quality cannot be guaranteed. In addition, the nano bubbles float upwards, the release process of the nano bubbles in water is very slow, after the bubbles are adhered to the flocs, the density is reduced, the settling speed is slowed down, and the surface load of the sedimentation tank is reduced.
Chinese patent publication No. CN208747821U discloses a reaction, precipitation, air flotation integrated water treatment device, including reaction tank, sedimentation tank, sludge hopper, air flotation tank, wherein the sedimentation tank below is provided with the sludge hopper, and the reaction tank is located the top of sedimentation tank and connects through the connecting pipe, and the connecting pipe extends to the sedimentation tank lower part, and the sedimentation tank top is equipped with the collecting chamber, and the collecting chamber top is provided with the air flotation chamber, and the air flotation chamber comprises contact chamber and separation chamber, the contact chamber is hollow pipeline structure, and on the contact chamber lower extreme was fixed in the collecting chamber, the contact chamber upper end inserted dissolved air water, the lower extreme of separation chamber was provided with the air flotation delivery port, air flotation chamber upper portion was provided with row sediment device, and row sediment device comprises slag scraping device and row sediment collection device, and the dross of formation was scraped into row sediment collection device through the slag scraping device.
According to the scheme, the vertical series connection of the sedimentation and the air flotation is realized, the air flotation is carried out after the sedimentation, the top water collection is conical, the water outlet is positioned in the center of the device, and the sedimentation effect is influenced due to the short flow during the operation. And a flocculating agent is not supplemented in the air floatation stage, and SS (suspended solid) in the effluent of the sedimentation tank is not enough to form flocs, so that the air floatation effect is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vertical flow type precipitation and air flotation device for water treatment and a working method thereof, and the vertical flow type precipitation and air flotation device has the advantages of reasonable structure, clear functional partition, no influence of the previous process on the subsequent process, stable operation, high solid-liquid separation efficiency, excellent effluent quality and the like.
The invention aims at realizing the above purpose through the following technical scheme that the vertical flow type sedimentation and air flotation device for water treatment comprises a tank body, wherein the middle upper part of the tank body is cylindrical, and a sludge discharge area, a water inlet and distribution area, a sedimentation water outlet stable flow area, an air flotation contact area and a slag-water separation area are vertically arranged on the tank body from bottom to top;
the middle part of the tank body is provided with a water inlet pipe communicated with a water inlet and distribution area, the water inlet pipe penetrates through a sedimentation water outlet stable area and penetrates through the center of the sedimentation area, and the tail end of the water inlet pipe is connected with a flow guide cone positioned in the center of the water inlet and distribution area;
the interior of the settling zone is provided with a filler for intercepting flocs in the upstream water flow;
a partition plate is arranged between the sedimentation water-outlet steady flow region and the air flotation contact region, the bottom of the air flotation contact region penetrates through the middle of the partition plate, a plurality of radial communicating pipes and annular water collecting pipes which are positioned on the same plane are arranged at the top of the sedimentation water-outlet steady flow region, a plurality of groups of through holes are arranged on the radial communicating pipes and the annular water collecting pipes, an ascending water flow is communicated with the radial communicating pipes through the annular water collecting pipes, the radial communicating pipes are communicated with the air flotation contact region, and a dissolved air water pipe communicated with;
the radial communicating pipe is provided with a flocculating agent supplementing device;
and a water outlet pipe communicated with the outside of the tank body is arranged at the bottom of the slag-water separation zone, and a slag scraping plate and a slag skimming machine driving device are arranged at the top of the slag-water separation zone.
By adopting the technical scheme, sewage after mixing and flocculation is radially distributed by the central diversion cone, flocs with large specific gravity sink to the mud discharge area, flocs with small specific gravity flow through the sedimentation area along with water flow, are intercepted on the filler and accumulate to a certain degree, naturally slide to the mud discharge area, the rest flocs flow into the annular water collecting pipe at the upper part of the sedimentation water steady flow area along with the water flow, the annular water collecting pipe is communicated with the radial communicating pipe, the water flow is connected with the bottom of the air flotation contact area through the middle part of the radial communicating pipe, a small amount of flocculant is supplemented on one side of the radial communicating pipe through a flocculant supplementing device, and the refluxed dissolved air water is converged with the effluent of the sedimentation tank in the air flotation contact area and releases the dissolved; the floc floats to the surface of the slag-water separation zone and is scraped off by a slag scraping plate at the top and discharged, and the clear water is discharged through a perforated pipe at the bottom of the air floatation tank.
Preferably, the lower part of the air floatation contact area is a vertical contact mixing section, the upper part of the air floatation contact area is an inclined diffusion section with a diffusion angle of 40 degrees, and the height of the inclined diffusion section is larger than that of the vertical contact mixing section.
By adopting the technical scheme, the design of the air flotation contact area is convenient for the air, water and flocs to be fully mixed in the contact area, the air is adhered to the flocs, the density is reduced, and scum is formed on the surface.
Preferably, the connecting cone angle of the diversion cone is 150 degrees, the diameter of the bottom circle is not less than 4 times of that of the water inlet pipe, and the water distribution is horizontal and annular and radial.
By adopting the technical scheme, the water distribution is as horizontal as possible and is annular and radial, and the radial-flow-type sedimentation tank has the advantages that the flow state of the radial-flow-type.
Preferably, the filler is a plastic inclined pipe or a plastic inclined plate, the installation angle is 65-70 degrees, the vertical height is not lower than 1.0m, and the top of the filler is provided with a steel bar net sheet for jacking and resisting floating.
Through adopting above-mentioned technical scheme, the pipe diameter 50mm is adopted to the pipe chute that packs, or the swash plate, and the interval of swash plate is 50mm, and its material is plastics, and the installation angle is the optimum 65 ~ 70, and vertical height can optimize to 1.0m, and the top adopts reinforcing bar net piece to press a top anti-floating, and the advantage lies in: the sludge accumulated on the filler can smoothly slide off, and the risk of sludge floating caused by anaerobic reaction generated when the sludge is accumulated on the filler is reduced.
Preferably, the flocculating agent supplementing device comprises a chemical feeding pipe located at the starting end of the radial communicating pipe, the chemical feeding pipe is obliquely arranged, and a lengthened pipeline mixer is connected behind the chemical feeding pipe.
By adopting the technical scheme, the chemical adding pipe is used for supplementing the flocculating agent required by air floatation, and the lengthened pipeline mixer is connected after the chemical adding point, so that the flocculation reaction of the flocs and the medicament is promoted.
Preferably, the dosing pipe is annular in the tank, and a plurality of interfaces are uniformly distributed and connected with the radial communicating pipe.
Through adopting above-mentioned technical scheme, the radial communicating pipe of multiunit that arranges along the center of air supporting contact zone all need fully to add the flocculating agent, and the medicine that adds that can high efficiency high degree of consistency through the pencil that adds of multiunit interface adds the medicine and fuses.
Preferably, the scraper plate is of a surface rotating type, one end of the scraper plate is connected with a slag skimming machine driving device, a slag hopper is arranged below one side of the scraper plate, the bottom of the slag hopper is inclined, the inclination angle is not smaller than 11.25 degrees, and the inclined tail end of the slag hopper is connected with a slag discharge pipe.
Through adopting above-mentioned technical scheme, after the mud had been gathered at the top of sediment water disengagement zone, drive the scum board through skimming machine drive arrangement and carry out horizontal rotation motion, be convenient for scrape into the sediment fill with the mud on surface, the sediment fill of slope utilizes mud self gravity to get into the scum pipe and flows out, has further optimized the structure.
Preferably, the aperture of the annular water collecting pipe is 10 mm-30 mm, 2 holes are formed in each section, and the distance between the sections of the holes is 10 cm-50 cm.
Through adopting above-mentioned technical scheme, porous interval sets up and is convenient for upward rivers can be abundant even entering annular collector pipe to even and radial communicating pipe and air supporting contact zone contact.
Preferably, one side of the water outlet pipe is connected with a water level regulator.
Through adopting above-mentioned technical scheme, there is the water level control valve water level regulator inside, through the degree of opening of adjustment water level control valve, controls the water level in the sediment water disengagement zone.
A vertical flow type precipitation and air flotation working method for water treatment comprises the following steps:
(1) the sewage after mixing and flocculation is radially distributed with water by a central diversion cone, and flocs with large specific gravity sink to a sludge hopper;
(2) the flocs with small specific gravity pass through the settling zone along with the water flow, are intercepted on the filler, are accumulated to a certain degree and naturally slide to a sludge hopper;
(3) the residual floc enters through a perforation of an annular water collecting pipe at the upper part of the precipitated effluent steady flow region along with water flow, and is connected with a contact region of the air flotation tank through a radial communicating pipe, and a small amount of flocculant is supplemented on the radial pipe;
(4) the refluxed dissolved gas water is converged with the effluent of the sedimentation tank in a contact zone, and the dissolved gas is released; the flocs float up to the surface of the separation area, are scraped to a slag hopper by a slag skimmer at the top and are discharged through a slag discharge pipe, and clear water is discharged through a perforated pipe at the bottom of the air floatation tank.
In conclusion, the beneficial effects of the invention are as follows:
1. the invention has high utilization rate of the tank volume and small occupied area, and reduces the processing difficulty of equipment by adopting assembled processing;
2. the invention has the advantages that the sewage containing different severe suspended matters is treated without switching, and the operation is simple;
3. the center of the sediment part of the invention is filled with water, and the periphery is filled with water, thereby prolonging the hydraulic flow and improving the sediment treatment effect;
4. the air flotation part of the invention supplements flocculating agent before entering the contact area, and mixes in the radial communicating pipe, fully reacts, forms floc again in the contact area, and improves the air flotation effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is an upper schematic view of the overall structure of the present embodiment;
FIG. 3 is a schematic diagram showing the arrangement of pipes in the present embodiment;
FIG. 4 is a schematic view for showing the arrangement of fillers in the present embodiment;
fig. 5 is a schematic bottom structure diagram of the present embodiment.
Reference numerals: 1. a tank body; 2. a water inlet pipe; 3. a dissolved air water pipe; 4. a releaser; 5. a flow guide cone; 6. a water inlet and distribution area; 7. a sludge hopper; 8. a sludge discharge pipe; 9. a settling zone; 10. precipitating a water steady flow area; 11. a radial communicating pipe; 12. an annular water collection pipe; 13. a medicine feeding pipe; 14. an air flotation contact area; 16. a slag hopper; 17. a slag-water separation zone; 18. a water outlet pipe; 19. a water level regulator; 20. a slag scraping plate; 21. a slag skimmer drive; 22. A slag discharge pipe; 23. a separator.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Example 1: as shown in figure 1, the vertical flow type sedimentation and air flotation device for water treatment comprises a tank body 1, wherein the tank body 1 is made of reinforced concrete, anti-corrosion carbon steel, stainless steel plates or plastic plates. The middle upper part of the tank body 1 is cylindrical, and a sludge discharge area, a water inlet and distribution area 6, a sedimentation area 9, a sedimentation water outlet stable flow area 10, an air flotation contact area 14 and a slag-water separation area 17 are vertically arranged on the tank body 1 from bottom to top.
As shown in figure 1, the middle part of the tank body 1 is provided with a water inlet pipe 2 communicated with a water inlet and distribution area 6, the water inlet pipe 2 passes through a sedimentation water outlet stable area 10 and passes through the center of a sedimentation area 9, the tail end of the water inlet pipe 2 is connected with a flow guide cone 5 positioned at the center of the water inlet and distribution area 6, the connection cone angle of the flow guide cone 5 is 150 degrees, the diameter of a bottom circle is not less than 4 times of that of the water inlet pipe 2, the water distribution is horizontal and annular and radial, the water distribution is horizontal as much as possible and annular and radial, and the advantage is that the tank type of a vertical flow sedimentation tank is utilized to create the flow state of.
As shown in figures 1 and 5, the sludge discharge area comprises a sludge hopper 7 positioned at the bottom, the sludge hopper 7 is an inverted hollow frustum, the included angle between the side wall of the inverted hollow frustum and the horizontal plane is 50 degrees, and the bottom of the sludge hopper 7 is connected with a sludge discharge pipe 8 for discharging sludge with large specific gravity for the first time.
As shown in fig. 1 and 4, the settling zone 9 is internally provided with a filler for intercepting flocs in the ascending water flow, the filler is a plastic inclined tube or a plastic inclined plate, the installation angle is 65-70 degrees, the vertical height is not lower than 1.0m, the top of the settling zone is provided with a reinforcing steel mesh sheet for jacking and resisting floating, the inclined tube of the filler is 50mm in pipe diameter or the inclined plate, the distance between the inclined plates is 50mm, the inclined plate is made of plastic, the optimal installation angle is 65-70 degrees, the vertical height can be optimized to be 1.0m, the top of the settling zone is provided with the reinforcing steel mesh sheet for jacking and resisting floating, the sludge piled up on the filler can smoothly slide, and the risk that the sludge is piled up on the filler and is subjected.
As shown in fig. 1 and 3, a partition 23 is disposed between the settling water steady flow region 10 and the air flotation contact region 14, the lower portion of the air flotation contact region 14 is a vertical contact mixing section, the upper portion is an inclined diffusion section, and the height of the inclined diffusion section is greater than that of the vertical contact mixing section. In the embodiment, the height of the vertical section is 30cm, the diffusion angle of the diffusion section is 40 degrees, and the height of the diffusion section is 50 cm. The height of the precipitated water stable flow area 10 is not less than 700mm, and the centers of the annular water collecting pipe 12 and the radial communicating pipe 11 are not lower than the center of the precipitated water stable flow area 10. The design of the air flotation contact zone 14 facilitates the sufficient mixing of air, water and flocs in the contact zone, the adhesion of air to flocs, the reduction of density and the formation of scum on the surface.
The bottom of the air flotation contact area 14 penetrates through the middle of the partition plate 23, the top of the precipitated water stable flow area 10 is provided with a plurality of radial communicating pipes 11 and annular water collecting pipes 12 which are positioned on the same plane, a plurality of groups of perforations are arranged on the radial communicating pipes 11 and the annular water collecting pipes 12, the ascending water flow is communicated with the radial communicating pipes 11 through the annular water collecting pipes 12, the radial communicating pipes 11 are communicated with the air flotation contact area 14, the aperture of the annular water collecting pipes 12 is 10-30 mm, 2 holes are formed in each section, and the section interval of each hole is 10. The plurality of holes are arranged at intervals, so that the upward water flow can sufficiently and uniformly enter the annular water collecting pipe 12, and then uniformly contacts the radial communicating pipe 11 and the air floatation contact area 14. The middle part of the tank body 1 is provided with a dissolved air water pipe 3 communicated with an air flotation contact zone 14, and the reflowing dissolved air water is converged with the effluent of the sedimentation tank in the air flotation contact zone 14 and releases the dissolved air.
As shown in fig. 1 and 3, the radial communicating pipe 11 is provided with a flocculant replenishing device, the flocculant replenishing device includes a chemical feeding pipe 13 located at the starting end of the radial communicating pipe 11, the chemical feeding pipe 13 is obliquely arranged, and an elongated pipe mixer is connected behind the chemical feeding pipe 13. The dosing pipe 13 is used for supplementing a flocculating agent required by air floatation, and is connected with a lengthened pipeline mixer after dosing points to promote flocculation reaction of flocs and a medicament. The dosing pipe 13 is annular in the tank, and a plurality of interfaces which are uniformly distributed are connected with the radial communicating pipe 11. The multiple groups of radial communicating pipes 11 radially arranged along the center of the air floatation contact zone 14 need to be fully added with flocculating agents, and the dosing pipes 13 with multiple groups of interfaces can be used for dosing and fusing with high efficiency and high uniformity.
As shown in fig. 1 and 2, a water outlet pipe 18 communicated with the outside of the tank body 1 is arranged at the bottom of the slag-water separation zone 17, the water outlet pipe 18 is provided with a plurality of through holes uniformly formed in one section in the slag-water separation zone 17 for allowing clean water to flow in, one side of the water outlet pipe 18 is connected with a water level regulator 19, a water level regulating valve is arranged in the water level regulator 19, and the water level in the slag-water separation zone 17 is controlled by regulating the opening degree of the water level regulating valve. The top of the slag-water separation zone 17 is provided with a slag scraping plate 20 and a slag skimming machine driving device 21. The scraper plate 20 is of a surface rotating type, one end of the scraper plate 20 is connected with a slag skimming machine driving device 21, a slag hopper 16 is arranged below one side of the scraper plate 20, the bottom of the slag hopper 16 inclines, the inclination angle is not less than 11.25 degrees, and the inclined tail end of the slag hopper 16 is connected with a slag discharge pipe 22. The skimmer drive 21 rpm of this example was set to 1.5 r/min. When the sludge is accumulated at the top of the slag-water separation zone 17, the slag skimming plate 20 is driven by the slag skimming machine driving device 21 to horizontally rotate, so that the sludge on the surface can be conveniently scraped into the slag hopper 16, and the inclined slag hopper 16 enters the slag discharge pipe 22 by utilizing the self gravity of the sludge to flow out.
The working process is as follows: the sewage after mixing and flocculation is radially distributed by a central diversion cone 5, flocs with large specific gravity sink to a mud discharge area, flocs with small specific gravity flow through a sedimentation area 9 along with water flow, are intercepted on a filler, accumulate to a certain degree and naturally slide to the mud discharge area, the rest flocs flow into an annular water collecting pipe 12 at the upper part of a sedimentation water stabilizing area 10 along with the water flow, the annular water collecting pipe 12 is communicated with a radial communicating pipe 11, the water flow is connected with the bottom of an air flotation contact area 14 through the middle part of the radial communicating pipe 11, a small amount of flocculant is supplemented on one side of the radial communicating pipe 11 through a flocculant supplementing device, and the refluxed dissolved air water is converged with the effluent of a sedimentation tank in the air flotation contact area 14 and the dissolved air; the floc floats to the surface of the slag-water separation zone 17, is scraped off and discharged by a slag scraping plate 20 at the top, and clear water is discharged through a water outlet pipe 18 at the bottom of the slag-water separation zone 17, so that the operation effect is good under the conditions of different water qualities. The SS concentration of the suspended matters in the raw water is 80-100 mg/L, the ammonia nitrogen concentration is 12-15 mg/L, after the treatment of the raw water by the vertical sedimentation-air floatation device, the SS concentration is stabilized below 8mg/L, and the ammonia nitrogen concentration is stabilized below 7.5 mg/L.
A vertical flow type precipitation and air flotation working method for water treatment comprises the following steps:
(1) the sewage after mixing and flocculation is radially distributed with water by a central diversion cone, and flocs with large specific gravity sink to a sludge hopper;
(2) the flocs with small specific gravity pass through the settling zone along with the water flow, are intercepted on the filler, are accumulated to a certain degree and naturally slide to a sludge hopper;
(3) the residual floc enters through a perforation of an annular water collecting pipe at the upper part of the precipitated effluent steady flow region along with water flow, and is connected with a contact region of the air flotation tank through a radial communicating pipe, and a small amount of flocculant is supplemented on the radial pipe;
(4) the refluxed dissolved gas water is converged with the effluent of the sedimentation tank in a contact zone, and the dissolved gas is released; the flocs float up to the surface of the separation area, are scraped to a slag hopper by a slag skimmer at the top and are discharged through a slag discharge pipe, and clear water is discharged through a perforated pipe at the bottom of the air floatation tank.
The invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and the modifications or substitutions include all types of sedimentation (regardless of the type of sedimentation tank) + flotation (regardless of the type of flotation tank), i.e., first sedimentation followed by flotation. All such equivalent modifications and substitutions are intended to be included within the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. The utility model provides a vertical flow formula deposits and air supporting device for water treatment which characterized in that: the device comprises a tank body (1), wherein the middle upper part of the tank body (1) is cylindrical, and a sludge discharge area, a water inlet and distribution area (6), a sedimentation area (9), a sedimentation water outlet stable flow area (10), an air flotation contact area (14) and a slag-water separation area (17) are vertically arranged on the tank body (1) from bottom to top;
the middle part of the tank body (1) is provided with a water inlet pipe (2) communicated with a water inlet and distribution area (6), the water inlet pipe (2) penetrates through a sedimentation water outlet stable area (10) and penetrates through the center of a sedimentation area (9), and the tail end of the water inlet pipe (2) is connected with a flow guide cone (5) positioned in the center of the water inlet and distribution area (6);
the interior of the settling zone (9) is provided with a filler for intercepting flocs in the upstream water flow;
a partition plate (23) is arranged between the precipitated water stable flow area (10) and the air flotation contact area (14), the bottom of the air flotation contact area (14) penetrates through the middle of the partition plate (23), a plurality of radial communicating pipes (11) and annular water collecting pipes (12) which are positioned on the same plane are arranged at the top of the precipitated water stable flow area (10), a plurality of groups of through holes are arranged on the radial communicating pipes (11) and the annular water collecting pipes (12), upward water flows are communicated with the radial communicating pipes (11) through the annular water collecting pipes (12), the radial communicating pipes (11) are communicated with the air flotation contact area (14), and a dissolved air water pipe (3) communicated with the air flotation contact area (14) is arranged at the middle;
the radial communicating pipe (11) is provided with a flocculating agent supplementing device;
the bottom of the slag-water separation zone (17) is provided with a water outlet pipe (18) communicated with the outside of the tank body (1), and the top of the slag-water separation zone (17) is provided with a slag scraping plate (20) and a slag skimming machine driving device (21).
2. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the lower part of the air floatation contact zone (14) is a vertical contact mixing section, the upper part of the air floatation contact zone is an inclined diffusion section with a diffusion angle of 40 degrees, and the height of the inclined diffusion section is larger than that of the vertical contact mixing section.
3. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the connecting cone angle of the diversion cone (5) is 150 degrees, the diameter of the bottom circle is not less than 4 times of that of the water inlet pipe (2), and the water distribution is horizontal and annular and radial.
4. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the filler is a plastic inclined pipe or a plastic inclined plate, the installation angle is 65-70 degrees, the vertical height is not less than 1.0m, and the top of the filler is provided with a steel bar net sheet for jacking and resisting floating.
5. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the flocculating agent supplementing device comprises a chemical feeding pipe (13) located at the starting end of the radial communicating pipe (11), the chemical feeding pipe (13) is obliquely arranged, and a lengthened pipeline mixer is connected behind the chemical feeding pipe (13).
6. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 5, wherein: the dosing pipe (13) is annular in the tank, and a plurality of interfaces which are uniformly distributed are connected with the radial communicating pipe (11).
7. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the slag scraping plate (20) is of a surface rotating type, one end of the slag scraping plate (20) is connected with a slag skimmer driving device (21), a slag hopper (16) is arranged below one side of the slag scraping plate (20), the bottom of the slag hopper (16) is inclined, the inclination angle is not less than 11.25 degrees, and the inclined tail end of the slag hopper (16) is connected with a slag discharge pipe (22).
8. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: the aperture of the annular water collecting pipe (12) is 10-30 mm, 2 holes are formed in each section, and the distance between the sections is 10-50 cm.
9. The vertical flow type precipitation and air flotation device for water treatment as claimed in claim 1, wherein: one side of the water outlet pipe (18) is connected with a water level regulator (19).
10. A vertical flow type precipitation and air flotation working method for water treatment comprises the following steps:
(1) the sewage after mixing and flocculation is radially distributed with water by a central diversion cone, and flocs with large specific gravity sink to a sludge hopper;
(2) the flocs with small specific gravity pass through the settling zone along with the water flow, are intercepted on the filler, are accumulated to a certain degree and naturally slide to a sludge hopper;
(3) the residual floc enters through a perforation of an annular water collecting pipe at the upper part of the precipitated effluent steady flow region along with water flow, and is connected with a contact region of the air flotation tank through a radial communicating pipe, and a small amount of flocculant is supplemented on the radial pipe;
(4) the refluxed dissolved gas water is converged with the effluent of the sedimentation tank in a contact zone, and the dissolved gas is released; the flocs float up to the surface of the separation area, are scraped to a slag hopper by a slag skimmer at the top and are discharged through a slag discharge pipe, and clear water is discharged through a perforated pipe at the bottom of the air floatation tank.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910817899.9A CN110776129B (en) | 2019-08-30 | 2019-08-30 | Vertical flow type precipitation and air floatation device for water treatment and working method thereof |
| PCT/CN2020/098068 WO2021036459A1 (en) | 2019-08-30 | 2020-06-24 | Vertical-flow type precipitation and air floatation device for water treatment and working method therefor |
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| WO2021036459A1 (en) * | 2019-08-30 | 2021-03-04 | 中清信益环境(南京)有限公司 | Vertical-flow type precipitation and air floatation device for water treatment and working method therefor |
| CN113844598A (en) * | 2021-09-29 | 2021-12-28 | 中清生态环境(宁波)有限公司 | Unmanned ship of collecting of surface of water floater |
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| Publication number | Publication date |
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| CN110776129B (en) | 2021-11-19 |
| WO2021036459A1 (en) | 2021-03-04 |
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