CN106731060A - Level stream sand filter and its water treatment technology - Google Patents
Level stream sand filter and its water treatment technology Download PDFInfo
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- CN106731060A CN106731060A CN201611109076.3A CN201611109076A CN106731060A CN 106731060 A CN106731060 A CN 106731060A CN 201611109076 A CN201611109076 A CN 201611109076A CN 106731060 A CN106731060 A CN 106731060A
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- water
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- sand filter
- pipe
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The present invention relates to a kind of level stream sand filter and its water treatment technology.Level stream sand filter includes pond body, raw water water inlet component, sand filter bed, filter water outlet component, aeration component and backwash component, raw water water inlet component includes water inlet pipe and raw water is sent into the water-distributing device in sand filter bed, water inlet pipe is connected with water-distributing device, water-distributing device is evenly distributed with multiple water outlet ducts in sand filter bed on the facade of water-distributing device；Filter water outlet component includes water collector and outlet pipe, and water collector has water inlet duct with the side of sand filter bed adjoining, and outlet pipe is connected with water collector；Backwash component includes backwash tube and blow-off pipe, and backwash tube is connected with outlet pipe, and blow-off pipe is connected with the water-distributing device.Level stream sand filter filter area of the invention is big, sand grains cleaning thoroughly, save water and energy, and expanded application is various, filter plant can be not only purely by way of to use, can also turn into the aerobic/hypoxic-ischemic brain-damage for integrating bio-contact oxidation and suspension filter bed retention functions.
Description
Technical field
The present invention relates to water treatment facilities, more particularly to a kind of level stream sand filter and its water treatment technology.
Background technology
Sand filter is typical filtering layer filter plant, the surface area provided using filtering layer bulk material, in trap water
Solid particle and colloid, make clarification of water.Sand filter can retain the particle diameter impurities in water small more than filtrate space, main by contact
Flocculation, is secondly sieving effect and precipitation.Because sand filter has, dirt-removing power is big, the work period is long, operation can
By many advantages, such as, thus be widely used in Water purification or sewage through the advanced treating after two stage treatment.
The operation of sand filter, mainly filters and backwashes two circulations of process.Existing sand filter, raw water filtration mistake
Journey is only carried out in vertical direction, and filter area is limited to the horizontal sectional area of equipment, and layer of sand is using insufficient；Sand grains is flushed
Journey, whole sand grains mixing are carried out, it is impossible to which the degree of fouling for sand grains carries out classification treatment.
The content of the invention
It is an object of the present invention to provide a kind of level stream sand filter, to solve layer of sand filtering surface in existing sand filtration technology
Product is limited, layer of sand utilizes insufficient blending rinsed problem of the filter sand different with degree of fouling.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of level stream sand filter, the level stream sand filter includes pond body, raw water water inlet component, sand filter bed, filter water water outlet group
Part, aeration component and backwash component,
Sand filter bed is made up of in pond body filter sand；
Raw water water inlet component includes water inlet pipe and raw water is sent into the water-distributing device in sand filter bed, water inlet pipe and water-distributing device phase
Even, water-distributing device is distributed with multiple water outlet ducts in sand filter bed on the facade of water-distributing device；
Filter water outlet component, including water collector and outlet pipe, water collector have water inlet duct with the side of sand filter bed adjoining, go out
Water pipe is connected with water collector；
Backwash component includes backwash tube and blow-off pipe, and backwash tube is connected with outlet pipe, blow-off pipe and the water-distributing device
It is connected.
Preferably, the water-distributing device is arranged on the axis direction of pond body；Or, being arranged on sand filter bed outer wall.
Preferably, the pond body material is concrete.According to different process demand, pond body can also use other materials,
Such as steel, acrylic.
Preferably, water-distributing device is the water distribution standpipe with water outlet duct.It may further be preferable that the water-distributing device
It is to be formed with the sieve plate system of enclosing with wedge shaped wires filtering surface, or the one kind in perforated pipe, wedge wire screen, or groups several above
Close；The water collector is formed with the sieve plate system of enclosing with wedge shaped wires filtering surface, or perforated pipe, wedge wire screen, microfiltration membranes, ultrafiltration
One kind in film, or combinations several above.
Preferably, the layout of the water-distributing device is using various configurations such as rectangle, circle, annular or linear, or with
Upper several combination.
Preferably, the water collector includes sieve plate and the cover plate positioned at sieve plate upper and lower ends, sieve plate and two cover plates exist
Collecting space is formed in pond body.
Preferably, when the water-distributing device is distributed along sand filter bed outer wall, the water collector is arranged on the axle of sand filter bed
On line direction.
Preferably, sieve plate described in water collector is arc piece that is continuous along pond body inwall or being intervally arranged, halfpace piece, bending
The laminated structure of piece, plain film or other geometric formats, sieve plate it is raised towards in pond body；Or, the sieve plate is that water distribution is distributed with
The cylinder in hole.According to different process demand, sieve plate may be alternatively provided as other forms, such as full wafer continuous type, rectangular sheet cabinet-type.
Preferably, the water collector is provided with the branch header of at least one and pond body ft connection, each Bifurcation Set
The outlet of water pipe is connected outside pond body with outlet pipe.
Preferably, aeration component is made up of aeration tube and the multiple aerators being connected with aeration tube, aeration component peace
Mounted in pond body bottom.
Preferably, each on water inlet pipe, outlet pipe, backwash tube, blow-off pipe set valve.
Preferably, backwash component sets up backwash tank, for storage part filter water, filter water is used as flushing water
For flushing process, clean water consumption can be greatly reduced.
Preferably, the aerator is the sieve plate with wedge shaped wires filtering surface.According to different process demand, aeration dress
Put and may be alternatively provided as other forms, such as perforated pipe, wedge wire screen or the appropriate hard distribution device of form/intensity, or its
Combining form.
A kind of water treatment technology of level stream sand filter, the technique includes following two processes；
（1）Filter process：Raw water enters level stream sand filter via water inlet pipe, and the water outlet duct by water-distributing device is uniformly gentle
Ground enters sand filter bed, and from inside to outside or from outside to inside flows through filter sand along pond body horizontal direction；In filter process, suspension in water
Grain or pollutant are intercepted by sand grains, and radial filter makes the efficiency of filter sand reach maximization；Finally, filter water is received by water collector
Collection, converges to outlet pipe discharge；
（2）Backwash process：Flushing water enters back into sand filter bed via backwash tube into water collector；Compressed air is passed through aeration
Pipe, through in entrance sand filter bed of the aerator of pond body bottom in the form of the bubble from bottom to top, the agitation of gas phase, current are cut
Collision friction between shear force effect and sand grains, makes foreign-matter contamination depart from from sand grain surface, into rinse water；Adjustment gas
Mutually agitation degree, controls sand grains rolling, by the reverse cleaning of rinse water, the dirty sand difference of different degree of foulings in different zones
Cleaned, will not be mixed；After a period of time, the rinse water with pollutant is imported in water-distributing device, is discharged via blow-off pipe
Level stream sand filter.
The water treatment technology of another level stream sand filter, the technique includes following two processes；
（1）Biofiltration process：Under suitable condition of culture, filter sand Surface Creation layer of gel shape biomembrane, raw water via
Water inlet pipe enters level stream sand filter, and sand filter bed is uniformly gently entered by the water outlet duct of water-distributing device, and along pond body water
Square to from inside to outside or from outside to inside flowing through filter sand；Aeration component open, compressed air through be aerated component, with the shape of minute bubbles
Formula being discharged into sand filter from bottom to top, is sufficiently fed oxygen；It is solvable in raw water when raw water flows through along filter sand surface
Property, colloidality and suspension material absorption be decomposed by the microorganisms on biomembrane；Finally, filter water is collected by water collector and converged extremely
Outlet pipe is discharged；
（2）Backwash process：Flushing water enters back into sand filter bed via backwash tube into water collector；Compressed air is passed through aeration
Pipe, through in entrance sand filter bed of the aerator of pond body bottom in the form of the bubble from bottom to top, the agitation of gas phase, current are cut
Collision friction between shear force effect and sand grains, makes foreign-matter contamination depart from from sand grain surface, into rinse water；Adjustment gas
Mutually agitation degree, controls sand grains rolling, by the reverse cleaning of rinse water, the dirty sand difference of different degree of foulings in different zones
Cleaned, will not be mixed；After a period of time, the rinse water with pollutant is imported in water-distributing device, is discharged via blow-off pipe
Level stream sand filter.
Preferably, Partial filtration water can keep in backwash tank, reuse is flushing in follow-up backwash process
Water.
Level stream sand filter of the present invention can be implemented function such as：
（1）Simple sand filtration, solid particle and colloidal suspended substance in removal raw water；
（2）Filter process opens aeration component, builds aerobic biofilter, and sand filter blanket makes bubble to the dissection of bubble in filter
Extended residence time in pond, improves the utilization rate of oxygen.
（3）Filter process closes aeration component, builds anoxic bacteria bed, due to the fabulous retaining power in filter tank, subsequently
Without setting secondary sedimentation tank again.
Beneficial effects of the present invention：
1. filter area is increased.Existing fixed sand filter or continuous sand filtration apparatus, raw water enter sand filtration from bottom water-locator
Bed, bottom-up to be filtered, filter area is only sand filter bed horizontal sectional area.And water-distributing device of the invention is used, raw water
Level stream filter bed, filter area is greatly increased, and can both improve effluent quality, and filter sand consumption can be reduced again.
2. subregion washed-out sand.With filtering carrying out, solid pollutant gradually sand grain surface deposit, from water-distributing device to
The degree of fouling of water collector sand grains gradually weakens.During reverse washed-out sand, the dirty sand difference of different degree of foulings in different zones
Cleaned, will not be mixed, washed-out sand process is more thorough.
3. save water and energy.By setting up backwash tank, can storage part filter water, filter water as rinse Water circulation
In flushing process, clean water consumption can be greatly reduced.The raising of filter sand efficiency so that backwashing period extends, washed-out sand frequency
Reduce, washed-out sand energy consumption is reduced.
4. level stream sand filter of the present invention can not only be purely by way of filter plant and use, under proper culture conditions, can
Using sand grains filtrate fixed biofilm, as the biological respinse for integrating bio-contact oxidation and suspension filter bed retention functions
Pond, the solid suspension that can effectively go in water removal reduces COD, BOD, turbidity, colourity etc..
Brief description of the drawings
Fig. 1 is a kind of schematic front view of level stream sand filter of the present invention.
Fig. 2 is a kind of left view schematic diagram of level stream sand filter of the present invention.
Fig. 3 is a kind of schematic top plan view of level stream sand filter of the present invention.
Fig. 4 is another schematic top plan view of level stream sand filter of the present invention.
In figure：1. pond body, 2. water inlet pipe, 3. water-distributing device, 4. sand filter bed, 5. water collector, 51. sieve plates, 52. cover plates, 6.
Branch header, 7. outlet pipe, 8. backwash tube, 9. blow-off pipe, 10. aeration tube, 11. aerators.
Specific embodiment
Below by specific embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.Should
Work as understanding, implementation of the invention is not limited to the following examples, any formal accommodation done to the present invention and/or
Change falls within the scope of the present invention.
Embodiment 1
A kind of level stream sand filter as shown in Figure 1, Figure 2 and Figure 3, is by pond body 1, raw water water inlet component, sand filter bed 4, filtering
Water outlet component, aeration component and backwash component composition.The effect of raw water water inlet component is that raw water is sent into sand filter bed simultaneously
It is uniformly distributed,
Pond body 1 is rectangle, and material is concrete；
Raw water water inlet component is made up of water inlet pipe 2 and the water-distributing device 3 being connected with water inlet pipe, and valve is set on the water inlet pipe 2,
For raw water to be introduced into level stream sand filter；The water-distributing device 3 is 4 water distribution standpipes, is evenly distributed with out on water distribution standpipe
Water hole road, each water distribution standpipe is vertically set in sand filter bed 4 and is uniformly distributed.Water distribution standpipe can use with wedge shaped wires filtering surface
The sieve plate system of enclosing is formed, and raw water uniformly gently enters sand filter bed 4 by the screen slot of sieve plate.The cloth water-bound of water distribution standpipe of the present invention
It is not limited thereto, this example is only preferred.
Sand filter bed 4, is made up of filter sand, extends in pond body 1 and from the bottom up of pond body 1, for filtering raw water；Filter sand
It is the material of main part of purificating raw water filtering, can select the filter mediums such as quartz sand, activated carbon, anthracite, glass marble, haydite, should
Water quality requirement according to raw water quality and filter water selects the classification and grain composition of filter sand.
Filter water outlet component, is made up of water collector 5, branch header 6 and outlet pipe 7；The water collector 5, including tool
There are the sieve plate 51 and the cover plate 52 positioned at sieve plate upper and lower ends of wedge shaped wires filtering surface, sieve plate and two cover plates are formed in pond body inwall
Collecting space, water collector 5 is provided with the branch header 6 with pond body ft connection, and the outlet of each branch header 6 is outside pond body
Wall is connected with outlet pipe 7.Filter water through sand filter bed 4 enters in water collector 5 through the screen slot of sieve plate, as shown in figure 3, this implementation
The sieve plate of example is arc plate shape, sieve plate it is raised towards in pond body, the both sides inwall of pond body 1 respectively sets 4 arc pieces along pond body 1
Wall uniform intervals are arranged, and the sieve plate of arc piece shape is used to preferably collect the filter water from the filtering of the sand filter bed 4；The Bifurcation Set
Water pipe 6, is connected with water collector 5；The filter water discharge pond body 1 that the outlet pipe 7 will be filtrated to get through the sand filter bed 4.
Backwash component, including backwash tube 8 and blow-off pipe 9, valve is set on backwash tube 8, is connected with outlet pipe 7,
Valve is set on blow-off pipe 9 and is connected with the bottom of 4 water distribution standpipes, backwashing water enters in water collector through backwash tube, row
Dirty pipe is by washed-out sand sewage discharge horizontal quicksand filter tank.
Aeration component, is made up of aeration tube 10 and the multiple aerators 11 being connected with aeration tube, in sand filter backwash
During, compressed air through being aerated component, in being discharged into sand filter in the form of the minute bubbles；Aeration component is arranged on pond body bottom
Portion.
A kind of level stream sand filter water treatment technology, including following two processes：
（1）Filter process.The valve of water inlet pipe 2 is opened, and the valve of outlet pipe 7 is opened, the valve closing of backwash tube 8, the valve of blow-off pipe 9
Close.Raw water enters level stream sand filter via water inlet pipe 2, and sand filter bed 4 is uniformly gently entered by water distribution standpipe, and along pond
The horizontal direction of body 1 from inside to outside flows through filter sand.In filter process, the large scale suspended particulate or pollutant in water are by internal layer sand grains
Interception is got off, and small size pollutant is deposited between outer layer sand grains, and from inside to outside filtering makes the efficiency of filter sand reach maximization.Most
Eventually, filter water is collected by the equally distributed water collector 5 of the inwall of pond body 1, flows through branch header 6, is converged to the row of outlet pipe 7
Go out.
（2）Backwash process.The valve closing of water inlet pipe 2, the valve closing of outlet pipe 7, the valve of backwash tube 8 is opened, blowdown
The valve closing of pipe 9.Temporary Partial filtration water enters the water collector 5 of the inwall of pond body 1, warp via backwash tube as flushing water
The duct on the surface of water collector 5 enters sand filter bed 4.Compressed air is passed through aeration tube 10, through the aerator 11 of the bottom of pond body 1 with gas
In the form of bubble entrance sand filter bed 4 from bottom to top, the collision between the agitation of gas phase, the shearing force of current and sand grains
Friction, makes foreign-matter contamination depart from from sand grain surface, into rinse water.In level stream filter process, the degree of fouling of sand grains
Nearby gradually weakened to pool wall from water distribution standpipe.Adjustment gas stirring degree, controllable sand grains rolls, passes through within the specific limits
The reverse cleaning of rinse water, the dirty sand of different degree of foulings respectively obtains cleaning in different zones, will not mix.For a period of time
Afterwards, the valve of blow-off pipe 9 is opened, and the valve of backwash tube 8 is persistently opened, and the rinse water with pollutant is imported in water distribution standpipe, warp
By the discharge horizontal quicksand filter tank of blow-off pipe 9.
Level stream sand filter of the invention can also realize the function of biofilter.Biofilter is to original using aerobic microbiological
The method that water carries out biological oxidation treatment.Another level stream biofilter water treatment technology, including following two processes：
（1）Biofiltration process.Under proper culture conditions, filter sand Surface Creation layer of gel shape biomembrane.Raw water via
Water inlet pipe 2 enter level stream sand filter, by water distribution standpipe uniformly gently enter sand filter bed 4, and along the horizontal direction of pond body 1 from
Filter sand is flowed through from inside to outside.Aeration component is opened, compressed air through being aerated component, being discharged into from bottom to top in the form of minute bubbles
In sand filter, oxygen is sufficiently fed.When raw water flows through along filter sand surface, solubility, colloidality and suspension material in raw water
Absorption is decomposed by the microorganisms on biomembrane.Finally, filter water is collected by the water collector 5 of the inwall of pond body 1, is flowed through point
Branch collector pipe 6, converges to outlet pipe 7 and discharges.
（2）Backwash process.Ibid.
Embodiment 2
A kind of level stream sand filter, including pond body 1, raw water water inlet component, sand filter bed 4, filter water outlet component, backwash component
And aeration component, with embodiment 1, difference is the concrete structure of level stream sand filter：
As shown in figure 4, being divided into 4 border circular areas in pond body 1,4 water-distributing devices 3, rectangular point of border circular areas are corresponded to respectively
Cloth, sets a sand filter bed and a water-distributing device in a border circular areas；Water inlet pipe 2 in raw water water inlet component is connected respectively
4 water-distributing devices 3；Water-distributing device is a water distribution standpipe, and water distribution standpipe can be formed with the wedge wire screen system of enclosing.4 water distribution standpipes
Bottom is connected with blow-off pipe respectively.
Filter water outlet component, is made up of water collector 5 and outlet pipe 7；Sieve plate 51 described in water collector 5 is columnar
Wedge wire screen, sieve plate is fixed on the inwall of pond body 1, and projection configuration of the cover plate 52 according to sieve plate and pond body inwall in the horizontal plane is true
Fixed, sieve plate and upper and lower two cover plates form collecting space together with the inwall of pond body 1, and whole pond body 1 shares a collecting space, should
Collecting space can keep in filter water；The outlet pipe 7 is connected with above-mentioned collecting space.
With embodiment 1, difference is the water treatment technology of the level stream sand filter of the present embodiment：
Filter water enters the collecting space that water collector 5 is constituted with the inwall of pond body 1, and unification is discharged through outlet pipe 7.The above-mentioned sky that catchments
Between can play a part of temporary filter water.
Embodiment described above is two kinds of the invention preferably schemes, not makees any formal to the present invention
Limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (10)
1. a kind of level stream sand filter, it is characterised in that：The equipment includes that pond body, raw water water inlet component, sand filter bed, filter water go out
Water assembly, aeration component and backwash component,
Sand filter bed is made up of in pond body filter sand；
Raw water water inlet component includes water inlet pipe and raw water is sent into the water-distributing device in sand filter bed, water inlet pipe and water-distributing device phase
Even, water-distributing device is distributed with multiple water outlet ducts in sand filter bed on the facade of water-distributing device；
Filter water outlet component, including water collector and outlet pipe, water collector have water inlet duct with the side of sand filter bed adjoining, go out
Water pipe is connected with water collector；
Backwash component includes backwash tube and blow-off pipe, and backwash tube is connected with outlet pipe, blow-off pipe and the water-distributing device
It is connected.
2. level stream sand filter according to claim 1, it is characterised in that：The water-distributing device is arranged on the axle of sand filter bed
On line direction, or it is distributed along sand filter bed outer wall.
3. level stream sand filter according to claim 1 and 2, it is characterised in that：The water collector includes sieve plate and is located at
The cover plate of sieve plate upper and lower ends, sieve plate and two cover plates form collecting space in pond body.
4. continuous sand filtration apparatus of level stream according to claim 1, it is characterised in that：When the water-distributing device is along sand filter bed
When outer wall is distributed, the water collector is arranged on the axis direction of sand filter bed.
5. level stream sand filter according to claim 1, it is characterised in that：The water-distributing device is with wedge shaped wires mistake
The sieve plate system of enclosing of filtering surface is formed, or the one kind in perforated pipe, wedge wire screen, or combinations several above；The water collector is
Formed with the sieve plate system of enclosing with wedge shaped wires filtering surface, or the one kind in perforated pipe, wedge wire screen, microfiltration membranes, milipore filter, or
Several combination above.
6. level stream sand filter according to claim 1, it is characterised in that：The layout of the water-distributing device using rectangle,
It is circular, annular or linear, or combinations several above.
7. level stream sand filter according to claim 5, it is characterised in that：Sieve plate described in water collector is along pond body inwall
The laminated structure of arc piece, halfpace piece, bent sheet, plain film or other geometric formats that is continuous or being intervally arranged, the raised court of sieve plate
To in pond body；Or, the sieve plate is the cylinder that water distributing pore is distributed with.
8. level stream sand filter according to claim 1, it is characterised in that：The water collector is provided with least one and pond body
The branch header of ft connection, the outlet of each branch header is connected outside pond body with outlet pipe.
9. a kind of water treatment technology of level stream sand filter, it is characterised in that：The technique includes following two processes；
（1）Filter process：Raw water enters level stream sand filter via water inlet pipe, and the water outlet duct by water-distributing device is uniformly gentle
Ground enters sand filter bed, and from inside to outside or from outside to inside flows through filter sand along pond body horizontal direction；In filter process, suspension in water
Grain or pollutant are gradually intercepted by sand grains, and radial filter makes the efficiency of filter sand reach maximization；Finally, filter water passes through water collector
Collect, converge to outlet pipe discharge；
（2）Backwash process：Flushing water enters back into sand filter bed via backwash tube into water collector；Compressed air is passed through aeration
Pipe, through in entrance sand filter bed of the aerator of pond body bottom in the form of the bubble from bottom to top, the agitation of gas phase, current are cut
Collision friction between shear force effect and sand grains, makes foreign-matter contamination depart from from sand grain surface, into rinse water；Adjustment gas
Mutually agitation degree, controls sand grains rolling, by the reverse cleaning of rinse water, the dirty sand difference of different degree of foulings in different zones
Cleaned, will not be mixed；After a period of time, the rinse water with pollutant is imported in water-distributing device, is discharged via blow-off pipe
Level stream sand filter.
10. a kind of water treatment technology of level stream sand filter, it is characterised in that：The technique includes following two processes；
（1）Biofiltration process：Under suitable condition of culture, filter sand Surface Creation layer of gel shape biomembrane, raw water via
Water inlet pipe enters level stream sand filter, and sand filter bed is uniformly gently entered by the water outlet duct of water-distributing device, and along pond body water
Square to from inside to outside or from outside to inside flowing through filter sand；Aeration component open, compressed air through be aerated component, with the shape of minute bubbles
Formula being discharged into sand filter from bottom to top, is sufficiently fed oxygen；It is solvable in raw water when raw water flows through along filter sand surface
Property, colloidality and suspension material absorption be decomposed by the microorganisms on biomembrane；Finally, filter water is collected by water collector and converged extremely
Outlet pipe is discharged；
（2）Backwash process：Flushing water enters back into sand filter bed via backwash tube into water collector；Compressed air is passed through aeration
Pipe, through in entrance sand filter bed of the aerator of pond body bottom in the form of the bubble from bottom to top, the agitation of gas phase, current are cut
Collision friction between shear force effect and sand grains, makes foreign-matter contamination depart from from sand grain surface, into rinse water；Adjustment gas
Mutually agitation degree, controls sand grains rolling, by the reverse cleaning of rinse water, the dirty sand difference of different degree of foulings in different zones
Cleaned, will not be mixed；After a period of time, the rinse water with pollutant is imported in water-distributing device, is discharged via blow-off pipe
Level stream sand filter.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109076.3A CN106731060A (en) | 2016-12-06 | 2016-12-06 | Level stream sand filter and its water treatment technology |
| US16/467,488 US11180395B2 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration pool and water treatment process thereof |
| ES17878216T ES2955163T3 (en) | 2016-12-06 | 2017-11-23 | Horizontal flow sand filtration basin and water treatment procedure thereof |
| AU2017372226A AU2017372226B2 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration pool and water treatment process thereof |
| EP17878216.5A EP3552679B1 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration basin and water treatment process thereof |
| PCT/CN2017/112605 WO2018103537A1 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration pool and water treatment process thereof |
| FIEP17878216.5T FI3552679T3 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration basin and water treatment process thereof |
| PL17878216.5T PL3552679T3 (en) | 2016-12-06 | 2017-11-23 | Horizontal-flow sand filtration basin and water treatment process thereof |
| JP2019531247A JP6797303B2 (en) | 2016-12-06 | 2017-11-23 | Horizontal quicksand filtration pool and water treatment process |
| DK17878216.5T DK3552679T3 (en) | 2016-12-06 | 2017-11-23 | HORIZONTAL FLOW-THROUGH SAND FILTER POOL AND WATER TREATMENT METHOD THEREOF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109076.3A CN106731060A (en) | 2016-12-06 | 2016-12-06 | Level stream sand filter and its water treatment technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106731060A true CN106731060A (en) | 2017-05-31 |
Family
ID=58879101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611109076.3A Pending CN106731060A (en) | 2016-12-06 | 2016-12-06 | Level stream sand filter and its water treatment technology |
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| RU2717522C1 (en) * | 2019-09-23 | 2020-03-23 | Федеральное государственное бюджетное научное учреждение "Российский научно-исследовательский институт проблем мелиорации" (ФГБНУ "РосНИИПМ") | Method of groundwater treatment for agricultural use |
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