CN100564280C - But the high-rate filter of back flushing - Google Patents
But the high-rate filter of back flushing Download PDFInfo
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- CN100564280C CN100564280C CNB2007101704191A CN200710170419A CN100564280C CN 100564280 C CN100564280 C CN 100564280C CN B2007101704191 A CNB2007101704191 A CN B2007101704191A CN 200710170419 A CN200710170419 A CN 200710170419A CN 100564280 C CN100564280 C CN 100564280C
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- back flushing
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- 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
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Abstract
But the present invention relates to a kind of high-rate filter of back flushing of environmental protection technical field, wherein: the back flushing overflow groove is arranged on one week of top, filter tank and exceeds Chi Ding, and a side is provided with the back flushing water port at the bottom of the back flushing overflow groove.Filter tank one side is provided with water-in below the top, filter tank, and what pass that the filter tank wall is connected with water-in is the water distributor that is fixed on top, filter tank, sets gradually intensified water-layout layer, filter material layer under the water distributor, and the filter material layer bottom is a supporting layer.The back flushing inlet pipe is embedded in the supporting layer bottom.Supporting layer, filter material layer and intensified water-layout layer are by the supporting plate support of supporting layer bottom.The supporting plate below was evenly distributed with along one week of column filter tank pool wall can open closeable ventilation opening.Filter tank, ventilation opening below one side is a water outlet, and filter tank, ventilation opening below opposite side is the back flushing water inlet pipe.The present invention can overcome the treatment effect that exists in the prior art effectively and be subjected to shortcomings such as hydraulic load influences greatly, the easy obstruction in filter tank.
Description
Technical field
The present invention relates to a kind of device of technical field of sewage, but specifically be a kind of high-rate filter of back flushing.
Background technology
In recent years, along with development economic and society, environmental problem becomes increasingly conspicuous, and sewage disposal is not only also very urgent in the city but also in the area, small towns.Numerous township and village enterprises are because of small scale, and the position disperses, and the waste water disposal facility investment is big, and enterprise wastewater is not appropriately handled and arbitrarily discharging.With the activated sludge process is the traditional technology of representative, as aerobic/anaerobic technology (A/O), anaerobism/double oxygen/aerobic process (A
2/ O), sequencing batch activated sludge technology (SBR) etc., though technology comparative maturity, but the widespread use that expensive cost and operational and administrative expenses have limited them is particularly in the scattered settlement area, small towns that lacks sewage collection system and the application of vertical how medium and small township and village enterprises.The biological filter has energy efficient, is easy to build and move advantages such as convenient as a kind of traditional sewage water treatment method, is applicable to very much the water pollution control of samll cities and towns in China.But poor processing effect when this method hydraulic load is excessive, the filter tank that treatment effect is good usually is subjected to the puzzlement of sludge blockage in service again.
Find through literature search prior art, existing technology of disposing of sewage with BAF, as Chinese patent application numbers 98252187.1, patent name is a BAF, this patent readme is: " the utility model relates to a kind of BAF; be used for Treating Municipal Sewage; sanitary sewage and trade effluent; it comprises: pond; water-in; packing layer, the aeration grid, supporting layer, water outlet, back-purge system, water-in and water outlet stagger mutually in vertical direction, water perpendicular flow from top to bottom or from bottom to top when the packing layer, packing layer is distributed on the supporting layer with particulate filler." though this BAF has the processing efficiency height, effluent quality is good, characteristics such as small accommodation area, it need continue aeration, the energy consumption height, back flushing is frequent, and management is got up comparatively complicated, and operator are had relatively high expectations.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, but provide a kind of high-rate filter of back flushing, be the urban residence sub-district, small towns five equilibrium live scattered residence district and township and village enterprises, the rural and urban industry garden provides a kind of device, can overcome the treatment effect that exists in the prior art effectively on the one hand influenced greatly by hydraulic load, shortcomings such as the easy obstruction in filter tank, improve processing efficiency greatly and improve operational conditions, make it have energy efficient (, using) on the other hand but this filter tank can be used as BAF because of adopting natural ventilation rather than aeration, management is simple, the characteristics that capital construction and working cost are low.
The present invention is achieved through the following technical solutions, the present invention includes: water-in, water distributor, supporting plate, back flushing inlet pipe, back flushing water inlet pipe, water outlet, ventilation opening, back flushing water port, back flushing overflow groove, intensified water-layout layer, filter material layer, supporting layer.Annexation is: the back flushing overflow groove is arranged on one week of top, filter tank and exceeds Chi Ding, and a side is provided with the back flushing water port at the bottom of the back flushing overflow groove.Filter tank one side is provided with water-in below the top, filter tank, and what pass that the filter tank wall is connected with water-in is the water distributor that is fixed on top, filter tank, sets gradually intensified water-layout layer, filter material layer under the water distributor, and the filter material layer bottom is a supporting layer.The back flushing inlet pipe is embedded in the supporting layer bottom.Supporting layer, filter material layer and intensified water-layout layer are by the supporting plate support of supporting layer bottom.The supporting plate below was evenly distributed with along one week of column filter tank pool wall can open closeable ventilation opening.Filter tank, ventilation opening below one side is a water outlet, and filter tank, ventilation opening below opposite side is the back flushing water inlet pipe.
Described back flushing overflow groove is ring-type back flushing overflow groove.
Described supporting plate is the glass epoxy of strip grid.
Described intensified water-layout layer is the horse hair rope, and corrosion-resistant and secular water erosion carries out distributing the second time to sewage.
Described filter material layer, its top is provided with the anti-clogging plug layer.
Described anti-clogging plug layer, its material are the multiaspect hollow ball fillers that extensively adopts in the water treating equipment.Can make hydraulic flow to changing, avoid the whole compacting of filter material layer, porosity reduces.
Described filter material layer, its main filtrate is the volcanics biofilter material, specific surface area is big.
Described ventilation opening is eight, and eight ventilation openings are along filter tank wall uniform distribution.Can open under the normal condition of natural ventilation, be beneficial to air admission, replenish the oxygen that biological metabolism consumes in the filter tank; Can be closed during back flushing, be beneficial to the inner enclosed space that forms in filter tank, backwashing water and backwash gas are entered.
When the present invention works, entered by water-in through pretreated sewage, by water distributor, evenly be sprayed onto on the intensified water-layout layer of filter tank topmost, this material can play the intensified water-layout effect.Through the quadratic distribution of intensified water-layout layer, water inlet arrives filter material layer.Biofilter material specific surface area in the filter material layer is big, and biofilm speed is fast, microbial film difficult drop-off during back flushing, and has porousness and suitable physical strength and proportion, suitable zoogloea apposition growth is withstood the hydraulic shear effect of varying strength, suspends easily during back flushing and does not run material.In this process, eight ventilation openings all are in open mode, and air is constantly added in the filtrate of filter tank.Can be added with the anti-clogging plug layer in the filter material layer middle and upper part, help improving filter tank venting and water permeable performance, be of value to microorganism aerobic growth, can well prevent the obstruction in filter tank, prolong filter tank working time, reduce the energy waste of back flushing repeatedly.When sewage filters from top to bottom, constantly be fixed on the filter tank in filter material layer contact, thereby microorganism is bred at filter material surface, form so-called microbial film.The biology community structure that microbial film is made up of multiple microorganism and microfauna, it utilizes organic pollutant in the sewage as nutritive substance, carries out katabolism and obtains energy, and form new microorganism body.Sewage also is purified in this process.Water outlet through main filter material layer is discharged by water outlet by behind the supporting layer.When filter tank operation for some time, solid matter and the biomembranous accumulation that comes off in the sewage appear in filtrate inside, stop up water stream channel, and the filter tank hydraulic load reduces, and just need carry out back flushing this moment.During back flushing, close eight ventilation openings and filter tank water-in and water outlet.Sewage of handling or clean water enter from filter tank bottom back flushing water inlet pipe, wash filtrate in the filter tank from top to bottom with bigger flow.After open back flushing inlet pipe ventilation, water-through and ventilating simultaneously.Close the back flushing inlet pipe afterwards, water flowing.This backwash process can carry out repeatedly, stops up in the filter tank and eliminates, and also keeps suitable microbial film simultaneously.The back flushing water outlet is overflowed the top, filter tank and is entered the back flushing overflow groove, discharges through the back flushing water port.The filter tank can normally be moved again afterwards.
The present invention compared with prior art has the following advantages and beneficial effect: overcome effectively that filter tank water outlet treatment effect is influenced greatly by hydraulic load, the filter tank is easily stopped up, the low inferior shortcoming of processing efficiency; Simultaneously, this system is subjected to environmental influence little, can not distribute unpleasant odor, does not influence ground landscape.For the processing of middle-size and small-size town domestic sewage, the present invention and traditional active sludge treatment process and other biological treatment comparative management are simple, can save capital cost and operational and administrative expenses more than 30%; Compare with BAF, can save energy consumption more than 30%.Have COD clearance, the total tp removal rate more than 60% and 30% above nitrogen removal efficiency more than 60%, treat effluent water quality is good, water reuse in promptly can be used for after conventional liquid chlorine sterilization.The backwashing function of the suitable collocation of filtrate, system can prevent effectively that the filter tank from stopping up and the appearance in dead band in the filter tank, has strengthened intrasystem water distribution uniformity effect, also helps the filter tank and ventilates and the biology aerobic effect.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is can closed ventilation opening layout drawing
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises water-in 1, water distributor 2, back flushing inlet pipe 3, back flushing water inlet pipe 4, water outlet 5, ventilation opening 6, back flushing water port 7, back flushing overflow groove 8, supporting plate 9, intensified water-layout layer 10, filter material layer 11, anti-clogging plug layer 12 and supporting layer 13.Back flushing overflow groove 8 is arranged on one week of top, filter tank and exceeds Chi Ding, and 8 end one of back flushing overflow groove side is provided with back flushing water port 7.Below the top, filter tank, filter tank one side is provided with water-in 1, what pass that the filter tank wall is connected with water-in 1 is the water distributor 2 that is fixed on top, filter tank, water distributor sets gradually intensified water-layout layer 10, filter material layer 11 for 2 times, filter material layer 11 bottoms are supporting layer 13.Back flushing inlet pipe 3 is embedded in supporting layer 13 bottoms.Supporting layer 13, filter material layer 11 and intensified water-layout layer 10 are by supporting plate 9 supports of supporting layer 13 bottoms.Supporting plate 9 belows were distributed with along one week of column filter tank pool wall can open closeable ventilation opening 6.Filter tank, ventilation opening 6 below one side is a water outlet 5, and filter tank, ventilation opening 6 below opposite side is a back flushing water inlet pipe 4.
As shown in Figure 2, eight can closed ventilation opening 6 along column filter tank pool wall one all uniform distribution.Open ventilation opening 6 during normal the operation, natural ventilation does not need aeration, saves energy consumption.Closure during back flushing forms enclosed space in the filter tank.Simultaneously under water inlet hydraulic load increase situation, can closed ventilation opening 6, back flushing inlet pipe 3 can be used as the aeration inlet pipe and uses, and device adopts the operation of BAF form.
Described water-in 1, its diameter are 3cm～8cm, are 20cm～30cm apart from the filter tank distance from top.
Described ventilation opening 6 is eight, and eight ventilation openings 6 are along filter tank wall uniform distribution.
Described back flushing water port 7, its diameter are 5cm.
Described back flushing overflow groove 8 is ring-type back flushing overflow groove, exceeds top, pond, filter tank 5cm～10cm.
Described supporting plate 9 is the glass epoxy of strip grid.
Described intensified water-layout layer 10 is horse hair ropes of 15cm, and corrosion-resistant and secular water erosion carries out distributing the second time to sewage.
Described filter material layer 11, its top is provided with anti-clogging plug layer 12, and anti-clogging plug layer 12 is 15cm～40cm with the distance on filter material layer 11 tops.
Described anti-clogging plug layer 12, its thickness are 25cm.
Described filter material layer 11, its main filtrate is the volcanics biofilter material, apparent density 1.66g/cm
3, specific surface area 12.8m
2/ g, porosity 73.84%, particle diameter 4-6mm.
Described supporting layer 13, its thickness are 15～30cm.
Enter by water-in 1 through pretreated sewage, by water distributor 2, evenly be sprayed onto on the intensified water-layout layer 10 of filter tank topmost, quadratic distribution through intensified water-layout layer 10, water inlet arrives filter material layer 11, in this process, eight ventilation openings 6 all are in open mode, and air is constantly added in the filtrate of filter tank.Be added with the anti-clogging plug layer in filter material layer 11 middle and upper parts, the distance on anti-clogging plug layer and filter material layer top is 15cm～40cm, to improve filter tank venting and water permeable performance, to be of value to the microorganism aerobic growth, when filtering from top to bottom, sewage contacts with filtrate, thereby microorganism is bred at filter material surface, form so-called microbial film, thereby sewage is purified in this process.Water outlet through main filter material layer 11 is discharged by water outlet 5 by supporting layer 13 backs.During back flushing, close eight ventilation openings 6 and filter tank water-in 1 and water outlet 5.Sewage of handling or clean water enter from filter tank bottom back flushing water inlet pipe 4, wash filtrate in the filter tank from top to bottom with bigger flow, after open 3 ventilations of back flushing inlet pipe, water-through and ventilating simultaneously.Close back flushing inlet pipe 3 afterwards, water flowing.This backwash process can carry out repeatedly, stops up in the filter tank and eliminates, and also keeps suitable microbial film simultaneously.The back flushing water outlet is overflowed the top, filter tank and is entered back flushing overflow groove 8, discharges through back flushing water port 7.The filter tank can normally be moved again afterwards.
Application example: with water jet loom waste water is process object, handles.
The intensified water-layout layer is the horse hair rope of 15cm, and filter material layer is the volcanics biofilter material, and the anti-clogging plug layer is 25cm plastics Ball-type packings, and supporting layer is a 15cm Nanjing Yuhua stone.System's hydraulic load is 9.8m
3/ m
2D, filtering velocity 0.4m/h, natural ventilation, sewage adopts the mode of batching continuously to stream down to intake.Water inlet is the water jet loom textile waste, and COD, ammonia nitrogen and total phosphorus concentration are respectively 200～400.0mg/L, 5.2～12.0mg/L, 0.2～0.9mg/L.
Effect: after aforesaid method was handled, all more than 80%, the ammonium nitrogen removal efficiency reached 35% to the clearance of COD and total phosphorus in system, and the COD in the water outlet, ammonia nitrogen and total phosphorus concentration are lower than 50mg/L, 7.0mg/L and 0.2mg/L respectively." miscellaneous domestic water quality standard " that satisfy promulgated by the ministries or commissions of the Central Government of nation-building (CJ/T48-1999).System's recoil cycle was 3 months～2 years.In this example, when system moved about 6 months, efficient descended to some extent, closes ventilation opening, filtrate has been carried out air water united recoil, and the recoil regenerative process is as follows: (1) closes into water; (2) water washes separately; (3) air washes separately; (4) air water is united flushing; (5) at last once with water rinse.Pollutant removal recovers substantially after the recoil.
Claims (10)
1. but the high-rate filter of a back flushing, comprise: water-in, supporting plate, the back flushing inlet pipe, the back flushing water inlet pipe, water outlet, the back flushing water port, the back flushing overflow groove, filter material layer, supporting layer, it is characterized in that, also comprise water distributor, ventilation opening, the intensified water-layout layer, the back flushing overflow groove is arranged on one week of top, filter tank and exceeds Chi Ding, a side is provided with the back flushing water port at the bottom of the back flushing overflow groove, filter tank one side is provided with water-in below the top, filter tank, what pass that the filter tank wall is connected with water-in is the water distributor that is fixed on top, filter tank, set gradually the intensified water-layout layer under the water distributor, filter material layer, the filter material layer bottom is a supporting layer, the back flushing inlet pipe is embedded in the supporting layer bottom, supporting layer, filter material layer and intensified water-layout layer are by the supporting plate support of supporting layer bottom, the supporting plate below was distributed with along one week of column filter tank pool wall can open closeable ventilation opening, filter tank, ventilation opening below one side is a water outlet, and filter tank, ventilation opening below opposite side is the back flushing water inlet pipe.
2. but the high-rate filter of back flushing according to claim 1, it is characterized in that: described water-in, its diameter are 3cm～8cm, are 20cm～30cm apart from the filter tank distance from top.
But 3. the high-rate filter of back flushing according to claim 1, it is characterized in that: described ventilation opening is eight, eight ventilation openings are along filter tank wall uniform distribution.
4. but the high-rate filter of back flushing according to claim 1, it is characterized in that: described back flushing water port, its diameter are 5cm.
5. but the high-rate filter of back flushing according to claim 1, it is characterized in that: described back flushing overflow groove is a ring-type back flushing overflow groove, exceeds top, pond, filter tank 5cm～10cm.
6. but the high-rate filter of back flushing according to claim 1 is characterized in that: the horse hair rope that described intensified water-layout layer is 15cm.
7. but the high-rate filter of back flushing according to claim 1 is characterized in that: described filter material layer, and its middle and upper part is added with the anti-clogging plug layer, and the distance between anti-clogging plug layer and the filter material layer top is 15cm～40cm.
8. but the high-rate filter of back flushing according to claim 7, it is characterized in that: described anti-clogging plug layer, its thickness are 25cm.
9. but according to the high-rate filter of claim 1 or 7 described back flushinges, it is characterized in that described filter material layer, its filtrate is the volcanics biofilter material, and apparent density is 1.66g/cm
3, specific surface area is 12.8m
2/ g, porosity is 73.84%, particle diameter is 4mm-6mm.
10. but the high-rate filter of back flushing according to claim 1, it is characterized in that: described supporting layer, its thickness are 15～30cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101704191A CN100564280C (en) | 2007-11-15 | 2007-11-15 | But the high-rate filter of back flushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101704191A CN100564280C (en) | 2007-11-15 | 2007-11-15 | But the high-rate filter of back flushing |
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| Publication Number | Publication Date |
|---|---|
| CN101182068A CN101182068A (en) | 2008-05-21 |
| CN100564280C true CN100564280C (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101704191A Expired - Fee Related CN100564280C (en) | 2007-11-15 | 2007-11-15 | But the high-rate filter of back flushing |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870519B (en) * | 2010-05-06 | 2012-07-25 | 同济大学 | Nitrogen and phosphorus removal bio-trickling filter by artificially strengthening natural ventilation |
| CN104003507B (en) * | 2014-05-23 | 2016-05-25 | 广州市金龙峰环保设备工程有限公司 | Quick bio filtered water treatment reactor and construction method thereof |
| CN104291466B (en) * | 2014-09-27 | 2016-08-24 | 吴玲玲 | Water treatment facilities |
| CN105152482A (en) * | 2015-09-15 | 2015-12-16 | 张家港市紫东机械科技有限公司 | Sewage treatment equipment |
| CN117623490B (en) * | 2023-12-29 | 2024-07-26 | 中铁八局集团有限公司 | Wastewater treatment and back flushing method for micro-aerobic aeration biochemical filter tank |
| CN117566900A (en) * | 2023-12-29 | 2024-02-20 | 中铁八局集团有限公司 | Micro-oxygen aeration biochemical filter tank for wastewater treatment |
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2007
- 2007-11-15 CN CNB2007101704191A patent/CN100564280C/en not_active Expired - Fee Related
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| CN101182068A (en) | 2008-05-21 |
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